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    • 专利摘要:
    The invention relates to a method for monitoring and controlling the operating conditions of a fiber web or finishing machine, which is carried out by means of a rotatable machine means (41) in the machine (10, 14), which is equipped with sensors (24) which measure temperature and where the sensing a measurement signal (25) is formed for the temperature of the machine means and a cross profile (21) of the temperature of the machine means is formed by the measurement signal. In addition, according to the method, one or more reference profiles (35) are created by the cross-sectional temperature of the machine means, the cross-profile is compared with the temperature of the machine member formed on the basis of the measurement signal and at least one for this created reference profile to find a change in the operating conditions of the fiber web or finishing machine. said change. The invention also relates to a corresponding system, rotating machine means and computer software product.
    公开号:FI20185515A1
    申请号:FI20185515
    申请日:2018-06-05
    公开日:2019-12-06
    发明作者:Tatu Pitkänen；Joe Cook；Heikki Kettunen；Gregory Vandecorput
    申请人:Valmet Technologies Oy；
    IPC主号:
    专利说明:

    METHOD, SYSTEM AND COMPUTER SOFTWARE PRODUCT FOR MONITORING AND MANAGING THE FIELD OF THE FIBERS OR THE FINISHING MACHINE
    The present invention relates to a method for monitoring and controlling the operating conditions of a fibrous web or finishing machine by means of a rotatable machine member provided with a temperature sensing device, wherein:
    - sensing generates a measurement signal from the temperature of the machine member,
    - forming a cross section profile of the machine member temperature from the measurement signal.
    In addition, the invention also relates to a corresponding system, a rotary machine member and a computer program product.
    [2] It is known that the internal water circulation of rolls of fiber web machines often causes significant internal lime buildup on the rolls and often also other contamination. These result, for example, in vibration problems of the rollers. In addition, the accumulation also affects the force profiles of the roll nipples.
    [3] In addition, the operation of the rolls, particularly in the case of deflection compensated and zone rolls, is affected by the temperature profile effects of the internal oil cycle of the roll. If, for example, due to flow disturbances, the oil circulation affects the roll such that one of the roll areas (typically one end of the roll) becomes hotter than the other area of the roll, this results in a larger line load in this roll area. Similarly, this phenomenon affects the paper profile and can even cause roll coating damage.
    [4] The operation of the rolls is also influenced by the temperature profile effects provided by the profilers provided with the rolls. Such profiling devices may include, for example, infrared dryers, induction / air profiling devices, and
    20185515 prh 05 -06- 2018 especially the press section steam box. The steam box of the press section has an effect on the profile of the press nip and thereby on the susceptibility to roll coating.
    [5] The above temperature effects can be seen, for example, from the force profile measured by the applicant's iRoll system. However, they do not, for example, directly deduce what the phenomenon is due to the temperature profile and what is due to other factors.
    It is an object of the present invention to provide a method, system, rotary machine element, and computer program product that can improve monitoring and control of operating conditions of a fiber web or finishing machine. Characteristic features of the method according to the invention are set forth in claim 1, system claim 11, rotary machine element claim 15 and computer program product claim 16.
    [7] With the invention, roller-mounted temperature sensing, by performing a temperature profile measurement and comparing the temperature profile formed from the measurement with a known, well-established temperature profile, can better detect and correct phenomena mentioned in the prior art description. Comparison of profiles can be performed, for example, in the machine control system with Run applications. They may also suggest corrective measures, for example, based on the profile of the deviation and the type of deviation.
    [8] Temperature profile monitoring of the roll casing and / or coating can determine, for example, the need for roll maintenance and cleaning, the functioning of the roll oil or other media circulation and / or feed, and any interference therein and / or profiler effects on the roll and production process. In general, the invention provides better insight into temperature-related factors and, in addition, can be used to identify and target corrective actions to better, more effective points in the process. [9] In one embodiment, temperature profile measurement and comparison can also be combined with nip force profile measurement and nip force profile of the situation found. Correlations between different profiles can also be searched. This will further facilitate the process of locating the problem and targeting the corrective actions more precisely. In this case, for example, if one of the profiles is acceptable, it excludes at least some of the potential sources of problems that have no significant impact on that profile. Other advantages of the method, system and computer program product of the invention will be apparent from the description and features of the appended claims.
    [10] The invention, which is not limited to the following embodiments, will be further described with reference to the accompanying drawings, in which:
    20185515 prh 05 -06- 2018
    Figure 1 is a rough diagram of an example of a fiber web machine and a sizer,
    Figure 2a illustrates a first example of a temperature sensing machine member which can be utilized in the invention,
    Fig. 2b shows another example of a machine element with a sensor that can be utilized in the invention,
    Figure 3 is a rough schematic view of the fiber web machine shown in Figure 1 and its associated condition control system,
    Figure 4 shows an example of a method according to the invention as a flowchart at a general level,
    Figure 5 illustrates an example of a method according to the invention as a flow chart for monitoring and controlling the operation of a roll, Figure 6 illustrates an example of a method according to the invention as a flow chart for monitoring and controlling the operation of a profiling device, Figure 7 illustrates an example of a method according to the invention in the form of a flow chart for monitoring and controlling operating conditions of a production process which utilizes temperature measurement and nip force or pressure measurement together; Figures 8a and 8b illustrate an example of a nip force profile and a temperature profile with the press section steam box off, 9a and 9b illustrate one example of a nip force profile and a temperature profile with the press section steam box on, and Picture 10 discloses information formed from temperature profile measurement data to monitor in principle the operating conditions of the roll. [11] In Figure 1 an example of an embodiment of the invention is provided
    20185515 prh 05 -06- 2018 of the tea in the form of a rough diagram, which in this case is a fiber web machine 10. In addition to the fiber web machine 10, the invention can also be utilized for example with a post-processing machine 14, also shown in FIG. Some examples of finishing machines 14 may include winding, longitudinal cutting, calendering, coating, surface sizing 14 'and rewinding.
    [12] The fiber web or finishing machine comprises one or more subassemblies 11-14. The fibrous web machine 10 may include in the running direction of web W, i.e. machine direction MD, successive subassemblies (Fig. 1 from left edge) , possibly one or more post-treatment devices 14, one of which is illustrated in Figure 1 as a Sizer or surface sizing device 14 '. The finishing device may be an integral part of a machine line (online) or its own separate part entity (offline). Of course, there may be other sections between sections 11-14. The order thus presented is not intended to limit the invention in any way. After the drying section 13 there may be, for example, calendering, coating, surface sizing 14 'and / or post-drying as shown in Figure 1, to name but a few examples before the roll (not shown).
    20185515 prh 05 -06- 2018 [13] At least some of the subassemblies 11 14 of the fibrous web machine 10 have one or more rotatable machine members 41. Some examples of rotating machine members 41 are rolls and cylinders that are in contact with or otherwise indirectly affect the web W. 15, 16, 18. At least one fabric 32, 33 may be arranged to pass through rollers and cylinders 15, 16, as is the case, for example, with subassemblies 11 to 13. The fabrics 32, 33 rotate in fabric twists 22, 23. The subassembly 14 may also be nonwoven. This is the case of the sizer 14 ', or subassembly 14, in the application example. The machine member 18, i.e. the roll, is then in direct contact with the web W. At some position, the contact of the web W with the rotating machine member can be only one-sided.
    [14] Figure 2a shows an example of a rotatable machine member 41. The machine member 41 may be, for example, a nip roll 15 forming a press nip 34, a surface sizing roll 18 on a sizer 14 or a calender roll, or even a reel winding cylinder having e.g. the cooling water circuit. More generally, the machine member may be a roll whose temperature is controlled, for example, by adjusting the medium, for example by cooling and / or heating it. On the other hand, the temperature of the machine member 41 may also be influenced by the process
    20185515 prh 05 -06- 2018 fasteners such as friction or pressure. The machine member 41 is provided with a temperature sensing sensor 24. The sensor 24 may be any sensor directly or indirectly measuring the temperature 17. The sensor 24 may include one or more temperature sensors 17. The temperature sensors 17 may be fitted, for example, on the shell 31 of the machine member 41. and / or a coating 43 applied to the casing 31. As some possible examples of sensors 17, there are mentioned thermosensitive semiconductors, resistive sensors or thermocouples. The sensing 24 may comprise, for example, a sensor strip 36 or a series of sensors formed by one or more discrete sensors 17.
    [15] The temperature sensor strip 36 may be on a roll, for example, in a spiral shape as shown in Figure 2a, or also in a straight row in the longitudinal direction of the roll. According to one embodiment, the sensor strip 36 can even rotate the roll with such a steep spiral that the roll is rotated several times with the sensor strip 36. Thus, the configuration of the temperature sensor 24 may be quite free. However, with a spiral mounting, the temperature sensor strip 36 is easy to install and has the least effect on the strength of the roll coating 43. However, the mounting geometry of the sensor strip 36 is not per se related to the operation of the sensor 17 or the method disclosed below.
    [16] According to one embodiment, each sensor 17 may have its own wire at the end of the roll, or the sensors 17 may also be connected in parallel. 2a, the sensors 17 belonging to the sensor strip 36 are preferably connected in series. The sensors 17 may be intelligent in themselves. The pulses passing through the entire array of sensors can be fed to the sensors 17 from the measuring electronics 40. As a result, each sensor 17 responds to its temperature or equivalent measurement signal 25 when it receives an excitation pulse from the measurement electronics 40. In this case, first the first sensor (mainly the measuring electronics 40) of the sensor strip 36 can respond, and then one by one each
    20185515 prh 05 -06- 2018 sensor 17 onwards until all sensors 17 have been passed. Thus, the measuring electronics 40 can receive a measuring signal 25 corresponding to the temperature reading from each sensor 17 in a sample sequence. The sample queue may be formed into a roll temperature profile 21 and displayed on a display device or used to form or calculate a reference profile 35 formed for the temperature profile 21, such as a comparison with one or more reference profiles 35 formed by the temperature. Embodiments related to the method will be described in more detail in the description below.
    [17] Yet another way compared to the pulse / serial sensor strip 36 described above is to use even more intelligent temperature sensors 17. Thus, each sensor 17 may have its own address, for example. In this case, the electronics 40 can always ask each sensor 17 for a temperature by first identifying the sensor from which the temperature is to be obtained, its address, the sensor 17 responding to the information request, and the data being transmitted through the digital bus to the measuring electronics 40. In this configuration . By knowing the position of each sensor 17 on the roll (longitudinal or transverse to the machine), a longitudinal temperature profile 21 of the roll can be formed. The spiral installation also achieves the machine or peripheral temperature profile of the roll.
    [18] The invention can utilize a temperature profile measuring system mounted on the sheath 31 of the roll 15, 16, 18 and / or under the roll cover 43, i.e. the surface of the sheath 31 and / or the roll cover 43 and / or the roll cover 43. In the applicant's case, it is marketed under the trade name iRoll Temp. It is clear that similar sensors and related measurement systems for measuring and forming a temperature profile are also known. They are equally applicable to the method and system of the invention.
    20185515 prh 05 -06-2018 [19] Measuring temperature and forming a temperature profile 21 therefrom can be performed by measuring temperature, for example, at set intervals, for example automatically. It should also be noted that the roll does not even need to be rotated and yet its temperature profile can be measured. Thus, the machine member 41 is characterized in the method by being rotatable.
    In the embodiment shown in Figure 2b, the machine member 41 is provided, in addition to the temperature sensing 24, also the force or pressure sensing 48. The sensing 48 may be formed by any of the sensors directly or indirectly measuring the pressure or force. Some examples include piezoelectric sensors, piezo-ceramic sensors, piezo-resistive sensors, power sensitive FSR sensors, capacitive sensors, inductive sensors, optical sensors, electromechanical membrane sensors, etc., which have sufficient resolution to produce the desired information. Again, the sensor 48 may consist of a sensor band 45 or a set of sensors formed by one or more discrete sensors 44.
    [21] According to one embodiment, the pressure or force sensing sensor 48 may be based, for example, on an electromechanical membrane sensor 45 known per se. The membrane sensors 45 may be provided on the roll casing 31 and / or on the coating 43. One example of such a membrane sensor 45 is the sensor known under the tradename EMF. Similarly, other sensors made of membrane materials operating on a similar basis may be considered, such as PVDF sensors. More generally, pressure sensitive membrane sensors can also be talked about. The sensor 48 may typically be mounted on the surface 31 of the shell 31 of the machine member 41. In this case, one or more surface layers, more generally a coating 43, are provided thereon. Under or inside the coating 43, the sensor 48 is protected or
    20185515 prh 05 -06- 2018 can be installed between coatings. Completely the same installation principles can also be used in case of temperature sensing 36 arranged on a roll.
    The pressure or force sensors 45 may also be inclined on the shell 31 of the machine member 41 and / or in the coating 43, as is exactly the case in Figure 2b. The sensor 48 may also be circumferentially located on the shell 31 of the machine member 41 and / or in the coating 43. In this case, the sensors 45 may be uniformly spaced apart on the roll shell 31. Then there is a sensor-free area between them. As they rise, the sensors 45 rotate the housing 31 of the machine member 41 spirally spaced apart. The angle of rotation of the sensors 45, more generally the sensor 48, on the shell 31 of the machine member 41 may be, for example, 180 to 320 degrees. The machine member 41 may have communication means 20 known per se for each of the sensors 24, 48 for transmitting the measurement signal 25, 50 formed therein to the condition control 38 included in the machine control automation. This may be implemented e.g. with a transmitter 20 adapted to the roll end. The receiver 40 may also have a transmission feature for forwarding the measurement signal 25, 50 to the receiving means 46 fitted therein to the machine control automation. The receiver 40 may also act as a transmitter in the direction of sensing 24 to collect the measuring signal 25, 50 from sensors 17, 44.
    [23] The method for monitoring and controlling the operating conditions of a fiber web or finishing machine will now be described in more detail as an exemplary embodiment with reference to Figures 3 and 4. Figure 3 illustrates a fiber web machine 10 shown in Figure 1 and a condition monitor 38 associated therewith, and Figure 4 illustrates the method in general flow diagram form. The operating conditions of the machine are monitored by a machine member 41 rotatable therein and a jacket 31 and / or coating 43 of the machine member 41 having, for example, a temperature sensor 24 or, as shown in Figure 2b, a force or pressure sensor 48.
    [24] In step 401 of the method, a machine member 41 with temperature sensing sensor 24 is rotated, for example, during production on a machine. In step 402 of the method, the sensor 24 provided with the machine member 41 generates a measurement signal 25 from the temperature of the machine member 41, to which the measurement signal 25 generated by the sensor 24 is proportional. This temperature may vary in the cross machine direction (CD), i.e. the longitudinal direction of the machine member 41. The measurement signal 25 generated by the sensor 24 can be stored. In step 403, a temperature cross section 21 of the machine member 41 is formed from the measurement signal 25.
    20185515 prh 05 -06-2018 [25] The temperature cross section profile 21 formed in step 403 can be utilized in step 404 which may have two sub-steps 404.1, 404.2. Steps 404.1 and 404.2 may be performed at least partially in parallel if required. step
    404.1 is formed on the temperature cross section profile 21 of the machine member 41 using one or more temperature reference profiles 35, for example, by reference to the measurement profile 25, and can be formed, for example, once or also in several discrete periods on a substantially continuous basis. It can be formed when it is found that the process, and in particular the associated devices, perform optimally for it and in the manner intended for it, and for example the quality of the web W formed in the process is acceptable. More generally, the reference profile may be formed by collecting a measurement signal 25 for one or more relatively long and known periods of time when the operating conditions of the fiber web or finishing machine 10, 14 and / or the quality of the product W to be formed This will determine the cross-sectional profile of the temperature under optimum production conditions. The reference profile 35 is formed, for example, by collecting a measurement signal 25 relatively long
    20185515 prh 05 -06- 2018 for a well-known period of production and quality and by calculating, for example, an average. In this case, the collection of the measurement signal 25 and the formation of the reference profile 35 may be substantially continuous.
    [26] The temperature reference profile 35 can also be formed at set time intervals. The temperature reference profile 35 can be said to be characterized by a set constant and goodness with good production and also quality. Thus, there is a tendency to form a reference profile 35 when the operating conditions of the fiber web machine 10 and / or the operation of the component of interest are known to be substantially optimal and the production to occur substantially free of interference. The temperature reference profile 35 of each machine member 41 is stored for use in machine control automation. The reference profile 35 is used to analyze the instantaneous cross section profile 21 formed from the position corresponding to the reference profile 35, which can be performed for step 404.1 in parallel to step 404.2.
    [27] In step 404.2 of the method, a temperature cross-section profile 21 of the machine member 41 formed from the measurement signal 25 is compared with at least one reference profile 35 already formed thereon in step 404.1.
    [28] The comparison in step 404.2 thus aims at finding a variation in the measured instantaneous temperature cross section profile 21 relative to the reference profile 35 in order to find a change regarding the operating conditions of the fiber web or finishing machine 10. More specifically, this comparison may be a comparison of the instantaneous temperature profile 21 and the undisturbed reference profile 35 formed over a period of time to detect a variation, difference, or equivalent change (deviation) in the temperature profile 21 relative to the at least one reference profile 35. Variation, difference or change indicates a change in the operating environment or its goodness. In general, the change is also reflected in the quality of the product being manufactured.
    [29] Step 405 generates comparison information 37, in particular visual information, to monitor the operating environment. More specifically, the comparison can be used to generate visual information from the temperature profile profile 37 of the level of variation, difference, or equivalent change / deviation determined and its occurrence in the cross machine direction (CD).
    [30] If it is determined in step 406 that a variation, difference, or change according to the set criterion has been found, proceed to step 407 to perform the change based action on the machine member 41 or associated condition or performance of the peripheral typically associated with temperature. More generally, it is possible to talk about the operations to be carried out on the basis of the modification in order to change the operating conditions of the fibrous web or finishing machine 10, 14. On the other hand, the actions to be taken on the basis of the change may also relate to the design of the machine member 41 or its peripheral.
    20185515 prh 05 -06- 2018 [31] In addition to these measures, or if no changes in the set criterion were detected at step 406, the method will continue to run. The method can be performed as a parallel continuous loop, at least for comparison purposes. The generation of the reference signal 35, i.e. step 404.1, may be intermittent according to a set criterion. It may, for example, take place on a newly introduced machine member 41. On the other hand, it may also occur, for example, in the form of a special calibration run from time to time. Here, the reference profile 35 is formed as the condition of the machine member 41 (or the functional part being measured) changes, for example due to aging or other process factors, but remains at an acceptable level.
    Fig. 5 shows an example of a method according to the invention as a flow chart now for monitoring the condition and operation of a roll 15, 16, 18 and Fig. 10 shows information 37 formed from profile measurement data 25 at a fundamental level to monitor the condition and functioning of a roll 15, 16, 18 in two different situations. Thus, the rotating machine member 41 with sensing 24 may be, for example, a nip roll 15, 16 belonging to a press nip 34, or also a roll having, for example, water or other media circulation and cooled (and / or heated) therein, such Inside the rollers 15, 16, 18, medium such as water is circulated for cooling or heating, for example, the surface sizing roll 18, or oil for loading and / or lubricating the nip roll 15, 16, for example. The roll may also be a roll with cooling and / or heating, for example, lubricating jets and / or air blowing or circulating. Similarly, a principled example of a temperature cross section profile 21 of these rolls 15, 16, 18 is shown in Figure 10. In this embodiment of the method, the partial steps follow substantially the same as previously shown in Figure 4. Steps 501 to 504.1 and
    504.2 may correspond in principle to those described in connection with Figure 4. Here again, as step 504.1, a reference profile 35.1 is formed for the temperature profile 21 of the roll 15, 16, 18.
    20185515 prh 05 -06- 2018 [33] In the embodiment shown in Figure 5, the temperature profile sensor 24 mounted on the rotating nip roll 15, 16 and / or surface sizing roll 18 can continuously monitor the temperature and profile of roll 15, 16, 18, collect data over time and view changes in original with reference to a clean roll when lime or other dirt builds up inside the roll due to water circulation. Similarly, the temperature profile sensor 24 mounted on the rotary deflection compensated or zone controlled roll 15, 16 can continuously monitor the temperature of the roll 15, 16 and its profile, collect data over a long period of time and view changes.
    20185515 prh 05 -06- 2018 to the original 15 or 16 reference or design values of the original roll in good condition.
    [34] In the comparison performed in step 504.2, according to one embodiment, a differential temperature profile of the roll can be formed. The difference profile is obtained by continuously subtracting the stored reference profile 35 from the current temperature profile 21 measured during production, in which case the temperature profile measurement and comparison is performed automatically. For example, a bar graph can be formed from the calculated difference profile for temperature.
    [35] As information 37, at step 505, an up-to-date temperature cross section profile 21 can be formed, in addition to the above calculated difference profile, minus the principal real-time temperature profile 21 from the reference profile. These can be displayed in control rooms such as profile screens and color charts. From these, one can easily see how the temperature cross-section profile 21 has changed. For example, based on the difference profile, a warning can be given when values begin to approach the set alarm limits. When the limit is exceeded, an alarm is given. Also, other skew and / or evolution in the cross-section profile, for example, according to a set criterion, can alarm the alarm.
    [36] The evolution of the temperature profile can also be compared with the corresponding measurements made and recorded during the earlier stages of production. The comparison can be done manually or automatically. By comparison, alarms can be made as the temperature profile approaches, for example, values based on empirical information that indicate a problem in the roll. In this case, even automatic alarms can be learned when the values begin to approach those indicating, for example, roll failure or contamination. This allows you to plan the correct time for roll maintenance or replacement in a controlled manner.
    [37] The above issues are analyzed in step 506 either automatically by condition monitoring or by the operator. If the set criterion is met, in step 507, the roller may be repaired, or the roller may be replaced if the control measures in its operating parameters do not yet produce the desired result, that is, a change of profile to the desired one.
    20185515 prh 05 -06-2018 [38] More particularly, in the first embodiment, i.e. the cooled water circulation roll 18 with the sizer 14 ', the method and system can be used to monitor and optimize the operation of the internal cooling water circulation of the roll 18. If the lime buildup affects the temperature profile 21 of the roll 18 very strongly, the roll 18 can be removed from the machine 14 'for cleaning when a change in the set criteria of the roll 18 is found. In a smaller case, the temperature and flow of the water recycled in the roll 18 may be varied to achieve the desired minimum cooling in each area of the roll 18.
    [39] In another embodiment, on the other hand, with an oil-circulating roll, for example, a roll 15, 16 forming a press nip 34, the method and system can be used to monitor and optimize the internal oil circulation and components of the roll 15, 16. If, for example, due to a bad oil film, the temperature of the roll 15, 16 begins to rise, the roll 15, 16 may be removed for service. Or, if the oil circulation of the roller 15, 16 is not optimal, its effect can be monitored in various situations and information may be used to improve the performance of the roller 15, 16 for example in component upgrades and / or for example flow control and / or cooling. Thus, the method makes it possible to find changes in the working condition of the rolls 15, 16, 18.
    [40] In addition, at step 506, the difference between the successive temperature profiles 21 can also be compared over time. If any (local) change is detected, for example, a sudden roll coating failure can be detected and / or predicted. The system can learn to recognize sudden damage, for example, by examining the difference between adjacent measurements of the temperature profile: an excessive difference represents a defective spot that has entered the roller coating.
    20185515 prh 05 -06-2018 [41] Fig. 6 shows an example of a method according to the invention as a flow chart for monitoring and controlling the condition and operation of a profiling device 39. Here, too, the rotating machine member 41 with the sensor 24 may be a nip roll 16 belonging to the press nip 34. In this embodiment of the method, too, the initial sub-steps follow substantially the same as previously shown in Figure 4. Steps 601 to 604.1 and
    604.2 may correspond in principle to those explained in connection with Figures 4 and 5.
    [42] The difference with this embodiment, however, is that the temperature profile 24 mounted on the rotary press or other roll 16 continuously monitors the temperature of the roll 16 and its profile and effect on these external profiling devices 39, such as an induction profiling device, air profiler, press section steam box 49. In step 604.1, a reference profile 35.1 is formed on the temperature profile 21 of the roll 16, thus including the action of the profiling device 39. In the formation of the reference profile 35.1, data is again collected in the long term. The reference profile 35.1 may represent a situation in which the profiling device 39 is closed, i.e. inoperative, or in a situation that has been found to be optimal.
    [43] Step 604.2 compares the temperature profile of the main real-time roll 16 with the reference profile, and step 605 examines the changes in the temperature profile. If, at step 606, it is determined that the change / generated information does not meet the set criterion, then proceed to step 607, where
    20185515 prh 05 -06- 2018 to change the operating environment in the desired direction. In this embodiment, the method and system can be used, for example, to optimize the operation of the profiling device 39 and the profile of the roll nip 34 and to monitor interference of the profiling device 39.
    [44] Fig. 7 shows another third example of a method according to the invention as a flow chart for monitoring and also controlling operating conditions of a production process, which now utilizes the aforementioned temperature measurement and now also nipple force or pressure measurement on nip 34, 42.1, 42.2. and about profiling it together. With respect to temperature measurement, steps 701 through 703 of the flow chart may be similar to those already described in previous embodiments. In this embodiment, the corresponding operation steps are also carried out for measuring the nip force and for forming a profile thereof, i.e., during rotation of the machine member 41, its measurement and formation of the nip force or pressure profile 28 is performed.
    [45] Step 704 monitors the effect of nip force profile and temperature profile measurement on each other. In that step 705, for example, correlation analysis is performed on profiles 21, 28. It examines whether there is a deviation according to the criteria set in the profiles 21, 28. Then, in the event of a misalignment in the force or pressure profile 28 and / or the temperature cross section profile 21, the measured force or pressure profile 28 and the temperature cross section profile 21 of the machine member 41 are analyzed to find a possible correlation between them. For example, if the nip profile measurement in step 705.1 sees 28 high loads somewhere in the nip profile,
    705.2 checks if it is also visible in the temperature profile. If it is not visible, there is some problem with the loading of the water-circulating roll 18, but the water-circulation of the roll 18 is working as desired. More generally, therefore, the cause of the anomaly in the nip force or pressure profile 28 and / or the temperature cross section profile 21 is determined based on the finding of the correlation. Furthermore, based on the finding of the correlation, actions are taken to compensate for the deviation occurring in the force or pressure profile 28 and / or the temperature profile 21 of the machine member 41.
    [46] Another application is also the monitoring and control of surface sizing on a post-processing machine 14, more particularly a sizer 14 '. Thus, in this embodiment, the sensed rotatable machine member 41 is a roll 18 of a surface sizing device 14 'through which a paper web W passes through a nip 42 formed with another roll. With the rod 19, the surface sizing agent is applied in a manner known per se to the surface of the roll 19. With the Sizer 14 ', turning on the water cycle and / or the heat provided by the web W can influence the load profile of the surface sizing nip 42.1, 42.2 or rod 19, which is now a force or pressure profile 28. Here again, or parameters and performs the steps in steps
    705.3 adjusting the loads and / or step 705.4 the water circulation to compensate for these changes, more generally, the deviation in the force or pressure profile 28 and / or the temperature cross section profile 21.
    20185515 prh 05 -06-2018 [47] Similarly, for example, deflection compensated rollers or other similar oil-rotating rollers 15, 16 can monitor the effect of nip force profile and temperature profile measurement with each other. Thus, for example, if the nip profile measurement in step 705.1 sees a high load in the nip profile 28 somewhere, it can be checked in step 705.2 whether it shows the temperature profile 21 of the roll 15, 16, if not, there is probably a problem with the load parameters (step 705.3). are working properly. Hereby, step 705.4 may be omitted and return directly to step 702.
    [48] Further, the same tracking can also be applied to the profiling devices 39. They can also monitor correlation of nip force profile and temperature profile measurement at step 705. If the nip profile measurement sees a high load at step 705.1, it can be checked at step 705.2 to see the roll 15. If not, there is probably a problem with the load parameters and you can go to step 705.3. However, if the phenomenon is also visible at temperature, there may be a reason for the effect of the profiling actuator 39, which can be improved again in step 705.4. Faults of the profiling actuator 39 can also be identified from errors in the temperature profile. An example of this is given below.
    [49] Figure 8a shows, by way of example, the nip force profile 28 measured from the roll by the sensor means 48 and the temperature profile 21 measured by the sensor means 24 provided to the roll 16, the measurement being made with the steam box 49 of the press section 12 off. The nip force profile of Figure 8a shows that the load profile 28 is rather symmetrical.
    20185515 prh 05 -06-2018 [50] Figure 9a shows, by way of example, a nip force profile 28 measured from a roll by sensor means 48 and a temperature profile from a roll corresponding to the measurement shown in Figure 8a and 8b by sensor means 24 provided to roll 16. Now the measurement has been made with the steam box 49 of the press section 12 on. It is seen that the temperature is now higher and also has a larger shape in the profile 21. The load profile 28 is now also inclined. The profile 28 is skewed by the skewing of the steam box 49. The problem may also cause roller surface damage.
    [51] Figure 10, in turn, is a graph showing the temperature cross-section 21 of the applications shown in Figure 4-6. It will be appreciated by those skilled in the art that, in reality, the shape of the profiles can vary greatly. Horizontally, there is a position axis, i.e., points from the shell 31 of the machine member 41 to the cross section of the machine
    20185515 prh 05 -06- 2018 nail CD and vertical temperature axis. Fig. 10 is a solid line showing the temperature reference profile 35. It illustrates the cross-sectional temperature profile under conditions of operation and web quality as desired. The reference profile 35 may have been formed over a longer period of time when the machine operation has been at optimum level.
    [52] The cross-sectional profile 21 shown in dashed lines in Figure 10 shows the main real-time temperature profile measured by the machine member 41.
    [53] This measured principal real-time cross-section profile 21 clearly shows a difference with the reference profile formed 35. Comparison of the measured cross section 21 with the reference profile 35 can be made online automatically. The measuring signal 25 then shows whether the measured profile changes and, if so, in what type.
    [54] The search for fluctuations, differences, changes, generally, deviations, more generally comparisons, and correlations can be performed from profiles 21, 28 on a substantially continuous basis. The information 37 may also be more refined than the profiles alone. It can be, for example, various indexes, trends and tables. The information 37 may be displayed on the display 27 of the automation system 38 on a per-position basis, for example at specific or user-defined intervals.
    In addition to the method, the invention also relates to a system for monitoring and controlling the operating conditions of a fibrous web or finishing machine adapted to be performed by a rotatable machine member 41. The machine member 41 is provided with temperature sensing 24. The system comprises temperature sensing 24 the housing 31 of the machine member 41 and / or the coating 43 for generating a measurement signal 25 from the temperature of the machine member 41. In addition, the system also includes processor means 47 arranged as supports to form a temperature signal 21 of the machine member 41, user interface means 27 for viewing said / derived information 21 or associated data, and memory means 26.
    In the system, one or more reference profiles 35 are adapted from the measuring signal 25 formed by the sensor 24 to be formed by the processor means 47 to the temperature cross section profile 21 of the machine member 41. The reference profile 35 is adapted to be stored in one reference profile 35 formed thereon for detecting a change in the operating conditions of the fiber web or finishing machine 10, 14. The user interface means 27 is adapted to provide comparison information 37 for operating conditions of the fiber web or finishing machine 10 for performing operations based on the change. By comparison, profiles are meant to find variations, differences and changes. On an even more general level, deviations can also be talked about. The system is adapted to implement the sub-steps of the method described above, e.g.
    20185515 prh 05 -06- 2018 [57] According to one embodiment of the system, the machine member 41 may further be provided with a force or pressure sensor 48 adapted to measure a force or pressure profile 28 associated with the nip 34, 42 formed by the machine member 41, in addition to the temperature profile. Here, the processor means 47 is also adapted to analyze the measured force or pressure profile 28 of the machine member 41 and the temperature cross section 21 to find a possible correlation therebetween, preferably in the event of a misalignment in a possible force or pressure profile 28 and / or temperature section. The user interface means 27 is adapted to present the results related to the correlation analysis and preferably to propose targeted or non-correlated
    20185515 prh 05 -06-2018 measures to compensate for the deviation occurring in the force or pressure profile 28 of the machine member 41 and / or in the temperature cross section profile 21.
    In addition to the method and system, the invention also relates to a rotating machine member 41. It includes a sheath 31, a coating 43 mounted on the sheath 31, and a sensor 24, e.g., spirally mounted under or inside the coating 43. The machine member 41 is used in the above described method or system for monitoring and controlling operating conditions with respect to temperature.
    The rotating machine member 41 in the system may be, for example, a nip roll 15, 16 forming a press nip 34, a water-circulating roll 18 and / or a roll 16 in the circuit of the profiler 39.
    [60] In addition to the method and system, the invention also relates to a computer program product 29. The computer program product 29, which may be, for example, downloadable on a suitable storage medium or downloaded over a computer network, is configured to provide various applications of the above method for monitoring and controlling operating conditions regarding and with respect to temperature.
    [61] The methods, systems and computer program logics 30 of the invention may be arranged, for example, as part of a machine control automation system. monitoring can be automatic and principally continuous. Another benefit is the automation, timeliness and learning of the systems.
    It is to be understood that the foregoing description and the accompanying drawings are intended only to illustrate the present invention. Thus, the invention is not limited to the embodiments set forth above or as defined in the claims, but many variations and modifications of the invention which are possible within the scope of the inventive concept defined in the appended claims will be apparent to those skilled in the art.
    权利要求:
    Claims (16)
    [1]
    A method for monitoring and controlling the operating conditions of a fibrous web or finishing machine, which is performed on the machine (10, 14) by a rotatable machine member (41) provided with a temperature sensing sensor (24), wherein:
    - generating, by sensing (24), a measurement signal (25) from the temperature of the machine member (41),
    forming from the measuring signal (25) a temperature profile (21) of the machine member (41), characterized in that the method further comprises:
    - forming one or more reference profiles (35) for the temperature section (21) of the machine member (41),
    comparing the temperature profile (21) of the machine member (41) formed by the measuring signal (25) and at least one reference profile (35) formed thereon to find a change in operating conditions of the fibrous web or finishing machine (10, 14),
    - taking action on the basis of the said change.
    [2]
    Method according to claim 1, characterized in that the sensor (24) comprises one or more temperature sensors (17) fitted to the housing (31) of the machine member (41) and / or to the coating (43) applied to the housing (31).
    [3]
    Method according to Claim 1 or 2, characterized in that one or more reference profiles (35) of temperature are formed by collecting a measuring signal (25) for one or more relatively long periods during which the operating conditions of the fibrous web or finishing machine (10, 14) the quality of the product (W) largely meets the criteria set for them.
    [4]
    Method according to one of Claims 1 to 3, characterized in that the operation is carried out on the basis of said change
    20185515 prh 05 -06- 2018 are related to changing the operating conditions of the fiber web or finishing machine (10, 14).
    [5]
    Method according to one of Claims 1 to 4, characterized in that
    - in addition to the temperature cross section profile (21), a force or pressure profile (28) associated with the nip (34, 42) formed by the machine member (41) is measured,
    - analyzing the measured force or pressure profile (28) of the machine member (41) and / or the temperature cross section (21) for a possible correlation between them, in the event of a deviation in the force or pressure profile (28),
    performing, on the basis of finding or not finding a correlation, targeted actions to compensate for the deviation in the force or pressure profile (28) and / or the temperature profile (21) of the machine member (41).
    [6]
    Method according to one of Claims 1 to 5, characterized in that the rotating machine member (41) is a roll (15, 16, 18) within which a medium, such as water, is circulated for cooling or heating the roll (18) or oil, for example. for loading and / or lubricating a roll (15, 16) or a roll equipped with cooling and / or heating lubricating jets and / or air blowing or circulating.
    [7]
    Method according to Claim 6, characterized in that after a change in the set criterion of the temperature cross section profile (21) of the roll (18), the temperature and / or flow of the medium to be recycled in the roll (18) is changed to achieve the desired effect such as cooling ) in which area or alternatively the roller is cleaned (18).
    20185515 prh 05 -06- 2018
    [8]
    Method according to one of Claims 5 to 7, characterized in that the post-processing machine (14) is a surface sizing device (14 '), in which
    - said force or pressure profile (28) is a load profile (28) of the surface sizing nip (42) and / or rod (19), said actions being made to adjust the loads and / or fluid circulation or feed in the force or pressure profile (28) and / or to compensate for the deviation in the cross section profile (21).
    [9]
    Method according to one of Claims 1 to 8, characterized in that the comparison is used to generate visual information (37) regarding the operating conditions of the fiber web or post-processing machine (10, 14).
    [10]
    Method according to one of Claims 1 to 9, characterized in that the operations performed on the basis of said change are related to the design of the machine element (41).
    [11]
    A system for monitoring and controlling the operating conditions of a fibrous web or finishing machine, adapted to be performed by a rotatable machine member (41) provided with a temperature sensing sensor (24) and comprising:
    - a temperature sensing sensor (24) fitted to the housing (31) and / or coating (43) of one or more machine members (41) to form a measuring signal (25) from the temperature of the machine member (41),
    - processor means (47) adapted to form, from the measuring signal (25), a temperature cross section profile (21) of the machine element (41), user interface means (27) for viewing said cross section profile (21),
    - memory means (26), characterized in that in the system a measuring signal formed by a sensor (24)
    20185515 prh 05 -06-2018 (25) is configured by processor means (47) to form one or more reference profiles (35) of a temperature cross section of the machine member (41) adapted to be stored in the memory means (26),
    - the processor means (47) being adapted to compare the temperature cross section (21) of the machine element (41) formed with the measuring signal (25) and at least one reference profile (35) formed thereon to detect a change in operating conditions of the fiber web or finishing machine (10, 14),
    - the user interface means (27) is adapted to generate the comparison information (37) for operating conditions of the fiber web or post-processing machine (10, 14) to perform operations on the basis of said change.
    [12]
    A system according to claim 11, characterized in that the system is adapted to carry out the sub-steps of one or more of the methods according to claims 2 to 10.
    [13]
    System according to claim 11 or 12, characterized in that
    - the machine member (41) is further provided with a force or pressure sensor (48) adapted to measure a force or pressure profile (28) associated with the nip (34, 42) formed by the machine member (41),
    - the processor means (47) is adapted to analyze the measured force or pressure profile (28) of the machine member (41) and the temperature cross section (21) to find a possible correlation between them preferably in a possible force or pressure profile (28) and / or temperature profile (21) ), the user interface means (27) is adapted to present the results of the correlation analysis and preferably to propose targeted actions based on the finding or the non-finding of the correlation in the force or pressure profile (28) and / or the temperature profile (21) .
    [14]
    System according to one of Claims 11 to 13, characterized in that the rotatable machine element (41) is an oil-circulating roll (15, 16) and / or a water-circulating roll (18) and / or cooling and / or heating lubricating jets and / or roller blown or circulated.
    [15]
    15. A rotating machine member comprising:
    - a jacket (31), a coating (43) mounted on the jacket (31) and a temperature sensor (24) mounted beneath or inside the coating (43), characterized in that the machine member (41) is used in the method of claim 1 or system for monitoring the operating conditions of the fibrous web or finishing machine (10, 14).
    [16]
    A computer program product having computer program logic (30) configured to provide a method for monitoring and controlling the operating conditions of a fiber web or finishing machine (10, 14) according to one or more of claims 1 to 10.
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    同族专利:
    公开号 | 公开日
    FI128717B|2020-10-30|
    US20190368946A1|2019-12-05|
    DE102019114770A1|2019-12-05|
    AT521326A1|2019-12-15|
    AT521326B1|2020-10-15|
    CN110567738A|2019-12-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FI119033B|2006-05-09|2008-06-30|Metso Paper Inc|Apparatus, system and method for measuring operating conditions of a body rotating on a web forming or finishing machine|
    US9540769B2|2013-03-11|2017-01-10|International Paper Company|Method and apparatus for measuring and removing rotational variability from a nip pressure profile of a covered roll of a nip press|
    FI20165145A|2016-02-25|2017-08-26|Valmet Technologies Oy|Method, system and computer program product for monitoring the fitness of a moving continuous member in a fiber web or finishing machine|
    FI20165144A|2016-02-25|2017-08-26|Valmet Technologies Oy|Method, system and computer program product for monitoring the fitness of a fiber web or finishing machine|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    FI20185515A|FI128717B|2018-06-05|2018-06-05|Method, system and computer program product for monitoring and controlling operating conditions in a fibre web or finishing machine|FI20185515A| FI128717B|2018-06-05|2018-06-05|Method, system and computer program product for monitoring and controlling operating conditions in a fibre web or finishing machine|
    ATA50503/2019A| AT521326B1|2018-06-05|2019-06-03|PROCESS, SYSTEM AND COMPUTER PROGRAM PRODUCT FOR MONITORING AND CONTROLLING OPERATING CONDITIONS OF A FIBER WEB OR PAPER FINISHING MACHINE|
    DE102019114770.0A| DE102019114770A1|2018-06-05|2019-06-03|Method, system and computer program product for monitoring and controlling operating conditions of a fibrous web or paper finishing machine|
    US16/431,037| US20190368946A1|2018-06-05|2019-06-04|Measuring Temperature for Monitoring and Control of a Fiber Web or Finishing Machine|
    CN201910488295.4A| CN110567738A|2018-06-05|2019-06-05|Method, system and program for monitoring the operation of a web or paper finishing machine|
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