• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an epicyclic gear train, advantageously for a servomotor system, of the type comprising, disposed in a housing (18), a planet carrier (24) carrying a plurality of satellites (26), a ring gear (28) and a solar (30), the epicyclic train is characterized in that it comprises means (40) for changing the speed ratio between input and output, which are operable from outside the housing (18). The invention can be used in servomotor systems.
    公开号:FR3072746A1
    申请号:FR1759946
    申请日:2017-10-20
    公开日:2019-04-26
    发明作者:Etienne Bernard；Remy Lepan
    申请人:Bernard Controls；
    IPC主号:
    专利说明:

    The invention relates to a planetary gear train, advantageously for a servomotor system, of the type comprising, enclosed in a casing between an input shaft and an output shaft, a planet carrier, a crown and a solar, as well as 'A control method including a valve and a servomotor system using such a planetary gear train and equipped with a manual steering wheel control mechanism.
    It is known that the effort required to close a valve is not constant and varies depending on the stroke of the movable member, as illustrated in Figure 2. During the long phase d approach to the movable member, that is to say before the arrival on the valve sealing seat, the effort required is relatively constant and low and increases only considerably in the short tightening phase until the valve closes, the duration of which is generally less than 10% of the duration of the total stroke. However, in the servo-actuated systems with manual control handwheel, which are known, the manual control mechanism of the valve is designed solely as a function of the short phase of high forces without taking into account the much longer approach phase.
    The invention aims to overcome this drawback.
    To achieve this object, the invention proposes the use of a planetary gear train for transmitting the speed between the input and the output, which is characterized in that it comprises means for changing the transmission ratio. gears, which can be operated from the outside.
    According to an advantageous feature of the invention, the planetary gear is characterized in that the crown is rotatably mounted in the housing and in that the control means are adapted to impose on the crown a determined speed of rotation for the production of a first gear ratio and to secure in rotation the crown and the planet carrier to produce a second gear ratio.
    In another feature, the planetary gear is characterized in that the crown is capable of being locked in rotation by the control means.
    According to yet another feature, the planetary gear is characterized in that the crown and the planet carrier are each provided with an external toothing and in that the control means comprise a pinion which is movable between a position d 'meshing only of the external toothing of the crown and a position in which the crown and the planet carrier rotate in rotation by meshing the external teeth of the crown and the planet carrier.
    According to yet another feature, the planetary gear is characterized in that it produces, in the locking position only of the crown, a multiplication of the speed transmitted between the input and the output and in its fastening position in rotation of the crown and the planet carriers, a speed transmission between the input and the output at the ratio 1: 1.
    According to yet another feature, the planetary gear is characterized in that the pinion is mounted on a rod which is axially displaceable in the housing, parallel to the axis of the planetary gear, and in that the rod comprises at its outer end a member for controlling the change of the gear ratio and for selecting the desired gear.
    According to yet another feature, the planetary gear train is characterized in that the change and selection of a gear ratio is done by driving the control member into the housing or by pulling this member from the housing.
    According to yet another particularity, the planetary gear train is characterized in that the planet carrier constitutes the input member and the solar, the output member.
    The method of controlling a rotary actuator member of a device such as a valve, by displacement of the rotary member by rotation of a manual actuation flywheel between an open position of the valve and a valve closed position, the movement from the open position to the closed position comprising a first phase of approaching the closed position in which the torque applied to the flywheel is relatively low and a second embodiment of the closure, in which the torque to be applied to the steering wheel increases strongly, is characterized in that, during the first approach phase, with respect to the second phase, a multiplication of the number of turns is provided between the steering wheel and the rotary organ.
    According to an advantageous feature, the method is characterized in that a planetary gear train according to the invention is used for the change of transmission speed. .
    According to another advantageous feature, the method is characterized in that one uses, during the second phase (b) of the race, the planetary gear in its configuration in which the crown and the planet carrier are integral in rotation and during the first phase (a) in the configuration of the separation of the crown.
    The servomotor system for controlling an actuator member of a valve for opening and closing a flow path of a fluid, such as a pipe, and provided with a control wheel manual of the actuator member, is characterized in that it comprises a planetary gear train according to the invention.
    According to an advantageous feature, the system is characterized in that it implements the method according to the invention.
    The invention will be better understood, and other objects, characteristics, details and advantages thereof will appear more clearly in the explanatory description which follows, made with reference to the appended drawings given solely by way of example illustrating a embodiment of the invention and in which:
    - Figure 1 is a schematic view of a booster system according to the invention;
    - Figure 2 is a diagram of the operation of a valve, and illustrates the relationship between the valve closing torque and the valve stroke;
    - Figures 3 and 4 are perspective views of a first embodiment of a planetary gear train according to the invention, showing it respectively in its speed multiplication configuration and in its configuration of a ratio of 1: 1 gear transmission;
    - Figures 5 and 6 are functional schematic illustrations of a first version of a second embodiment of a planetary gear train according to the invention, showing it respectively in its speed multiplication configuration and in its configuration 1: 1 speed transmission ratio, and
    - Figures 7 and 8 are functional schematic illustrations of a second version of the second embodiment of the planetary gear train, showing it respectively in its speed multiplication configuration and in its configuration of a speed transmission ratio 1: 1.
    The invention will be described below, by way of nonlimiting example, in its application to a multi-turn servomotor system as shown in FIG. 1.
    According to the functional block diagram of this figure, the system comprises, mounted in series, a motor 1, a planetary gear train 3, a force limiter 5 and a reduction device 7 comprising a worm 8 and a toothed wheel 9 driven by the screw 8 and integral in rotation with the output shaft 14 intended to drive an actuator member such as the rotary member of a valve for closing and opening a conduit. The figure also shows, also mounted in series with the worm 8, a flywheel 11 for manual actuation of the actuator and a clutch system 13 and in accordance with the invention, a planetary gear 16 provided with a control unit 17.
    FIG. 2 shows the characteristic curve of the torque C of the movable actuator member of the valve as a function of the stroke of this member between its open position O on the right of the diagram and its closed position F on the left. It can be seen that the curve has two parts each defining a step in the process of closing the valve, namely a first phase a during which the torque C is relatively low and substantially constant and which is the approach phase of the rotary member before coming into contact with the valve seat, and phase b tightening until the valve closes.
    When it comes to closing the valve manually, by actuating the flywheel 11, the force required to close the valve and the effort that the operator must apply to the flywheel is relatively low in the phase approach a but increases sharply during phase b during which the actuated member, namely the cover, is engaged on the valve seat.
    According to the invention, it is proposed to optimize the use of manual control by adapting it to the curve of Figure 2. This object is achieved by providing between the two elements which are the steering wheel and the rotary member for closing and opening the valve, during the approach phase a where the torque is approximately constant and low, an increase in the speed of transmission between the two elements, i.e. the number of turns, compared to the transmission speed between the two elements in phase b where the operator, to ensure closure, must provide a much higher effort.
    In fact, in phase a where the torque is low, the invention makes it possible to reduce the number of turns to be applied to the steering wheel for a given valve stroke. A multiplication is carried out for this purpose between the flywheel and the rotary member. Of course, since there is a multiplication, the effort at the wheel must be greater compared to a direct torque transmission, without multiplication. But, since the required torque is relatively low, by choosing an appropriate multiplication value, the increase in effort may now be at a value which is not inconvenient for the operator. In phase b where the torque to be supplied increases, the invention plans to revert to direct transmission, which is equivalent to an increase in the number of turns to be given to the steering wheel, compared to phase a. But by increasing the number of turns to be applied to the steering wheel, you reduce the effort required for the steering wheel.
    To implement this objective, the invention proposes placing a planetary gear train with two speed transmission ratios between the flywheel 11 and the worm gear 8. Such a planetary gear train is shown, by way of example not limiting, in FIGS. 3 and 4. The planetary gear train according to the invention, denoted 16, comprises, enclosed in a casing 18 between the input shaft 20 and the output 22, a planet carrier 24, integral in rotation with the 'shaft 20 and carrier of three satellites 26 rotating each around an axis 27 of the planet carrier, a ring 28 with internal teeth meshing the satellites 26 and a sun 30 which the satellites drive and which is intended to be integral in rotation of the output shaft not shown.
    In this configuration, when the crown is blocked, that is to say immobilized in rotation in the housing, according to Figure 3, the satellites 26 cause the rotation of the sun 30 and the planetary gear, between its entry and its output, produces a multiplication in the transmission of speed, which is determined by the teeth of the components constituting the train.
    The speed of rotation of the output shaft and therefore of the worm 8 is thus multiplied with respect to the speed of rotation that the operator applies to the flywheel 11, by the multiplication ratio of the planetary gear.
    According to the invention, the planetary gear is used in this configuration of Figure 3, in phase a where the torque to be supplied to the actuator member is low.
    By cons, to ensure the lower speed of rotation during phase b which requires a higher torque and therefore a greater effort on the part of the operator, the planetary gear 16 is provided with means which ensure transmission speed between input and output at a 1: 1 ratio.
    To this end, the planetary gear train, in accordance with the invention, is provided with a device 40 which allows the planetary gear train to operate in the two gear ratios, and to select the desired ratio. In order for the device to be able to perform these functions, the crown is freely rotatably mounted in the casing and an external toothing 36 is provided on the radially outer surface of the crown and on the outer peripheral surface of the planet carrier 38. The device 40 for selective control of the two operating modes with different speed transmission ratios, comprises a rod 42 which is movable in the casing 18 in the radially outer part relative to the planet carrier and to the crown and carries a pinion 44. The rod 42 is movable parallel to the axis of the planetary gear train between the position shown in FIG. 3 in which the pinion 44 meshes only with the external toothing 36 of the crown and is locked in rotation in the casing 18 by engagement in a toothing 45 of the latter (Figure 4), and the position according to Figure 4 in which the pinion 44 meshes with both the has external teeth 36 of the crown and external teeth 38 of the planet carrier.
    It should be noted that in its position of engagement only of the toothing 36 of the crown and the locking in rotation of the pinion, the crown is also immobilized in rotation. In this configuration, the planetary gear train therefore operates in the first mode of multiplication of the output speed relative to the input speed. In its second position, according to FIG. 4, in which the pinion is freely rotatable in the casing and engages both the toothing 36 of the crown and the toothing 38 of the planet carrier, thus securing in rotation the crown and the carrier satellites, the planetary gear train operates in the second mode of the 1: 1 ratio. Indeed, since the crown and the planet carrier are integral in rotation and therefore have the same rotational movement, the satellites 26 cannot rotate about their axis. Consequently, since the satellites are fixed relative to the planet carriers, the solar is also fixed relative to the latter, which has the consequence that the speed of entry is identical to the speed of exit and the planetary gear train thus produced 1: 1 transmission ratio.
    To be able to select the desired report mode, the rod has at its free outer end a member, here by way of example an actuation button which constitutes the control member 17 in Figure 1 and allows therefore the order and selection from the outside.
    As can be seen from the figures, the planetary gear train with two-speed control can be brought from its configuration in FIG. 4, for securing in rotation the crown and the planet carrier, in its configuration for blocking the rotation of the crown, according to FIG. 3, by pressing the rod into the casing by pressing the button 17. By pulling the rod, the train returns to its configuration of FIG. 4.
    It appears from the above description, that the method of controlling the actuator member, by actuation of the flywheel 11, involves two operating phases, with different speed transmission ratios, namely a first phase which is characterized by a speed multiplication ratio and a second phase b characterized by the 1: 1 ratio.
    Of course, this method is not limited to the control of a valve and can be applied to the control of any other suitable actuator.
    As regards the planetary gear train, as described and shown in the figures, its use in the process and the system mentioned above is given by way of example and is not limiting and it can be used in any other field. technique where two speed operation is desirable.
    It should be noted that the planetary gear itself, as described and shown, is only an exemplary embodiment. Indeed, instead of providing a crown locked in rotation in the casing in its mode of multiplication of the speed, that is to say of the number of revolutions, between the entry and the exit of the planetary gear, one could also consider that the crown rotates at a given speed which could for example be imposed by an appropriate speed of rotation of the pinion, which would make it possible to modify the multiplication ratio. This modification could be carried out from the outside, for example by applying to the outside end of the pinion carrier rod with an appropriate rotary movement.
    Another example of implementation of the invention could be to remove the selector pinion by mounting the crown in the casing so that it is sliding between a position in which it is locked in rotation in an imprint of the casing , which makes it possible to obtain multiplication, and a position in which it meshes with the external toothing of the planet carrier, which secures in rotation the crown and the satellite carriers in order to be able to obtain the 1: 1 ratio.
    Figures 5 to 8 give the diagram of two versions of this implementation of the invention using a sliding crown in translation. In these figures, the components already present in the first embodiment according to Figures 3 and 4 are designated by the same references.
    Figures 5 and 6 illustrate a first version of implementation of this second embodiment of a planetary gear train according to the invention, in which the ring 28 is mounted, as indicated by arrows, axially displaceable in the housing 18 by sliding at 47 on a guide piece 48 which coaxially surrounds the input shaft 20 and is mounted fixed in the housing. In FIG. 5, the crown 28 is in its position for blocking in rotation in the casing 18, only driving the satellites 26 of the planet carrier 24. As explained above, in this configuration the planetary gear train operates in its multiplication mode of the speed between its inlet 20 and its outlet 22, in a manner corresponding to FIG. 3. In the case of FIG. 6, the ring 28 is moved axially in translation in its position for driving only the external toothing 38 of the door -satellites 24. In this rotational securing position of the crown 28 and the planet carrier 24, the planetary gear train operates in its transmission mode according to the 1: 1 ratio, in accordance with FIG. 4.
    In the second version of implementation of the second embodiment of the invention, in Figures 7 and 8, the crown 28 and the axis of the flywheel, that is to say the shaft inlet 20 form an assembly which is axially movable in the casing 18, as indicated by the arrows. The connection in rotation between the input shaft 20 and the satellite carriers 24 is made by sliding grooves indicated schematically by the reference 51. FIG. 7 shows the crown 28 in its position of blocking in rotation in the casing 18, and the FIG. 8 in its position of fastening in rotation with the satellite carriers 24.
    It is also conceivable within the framework of the invention, to reverse the structure of the planetary gear train by placing the solar at the entry and the planet carrier at the exit, which would make it possible to obtain an epicyclic train giving , in one configuration, a 1: 1 transmission ratio, and in another configuration a ratio where the output speed is lower than the input speed.
    权利要求:
    Claims (13)
    [1" id="c-fr-0001]
    1. planetary gear train, advantageously for a servomotor system, of the type comprising, disposed in a casing (18), a planet carrier (24) carrying a plurality of satellites (26), a crown (28) and a solar ( 30), characterized in that it comprises means (40) for changing the input and output speed ratio, which can be actuated from outside the casing (18).
    [2" id="c-fr-0002]
    2. planetary gear according to claim 1, characterized in that the crown (28) is rotatably mounted in the housing (18) and in that the control means (40) are adapted to impose on the crown (28) a speed of rotation determined for the production of a first gear ratio and for securing in rotation the crown (28) and the planet carrier (24) to produce a second gear ratio.
    [3" id="c-fr-0003]
    3. planetary train according to claim 2, characterized in that the crown (28) is capable of being locked in rotation by the control means (40).
    [4" id="c-fr-0004]
    4. planetary gear according to one of claims 2 or 3, characterized in that the crown (28) is movably mounted in the casing between a position in which it is locked in rotation in the casing and a position in which it is integral in rotation of the planet carrier (24).
    [5" id="c-fr-0005]
    5. planetary gear train according to one of claims 2 or 3, characterized in that the crown (28) and the planet carrier (24) are each provided with an external toothing (36, 38) and in that the means control (40) comprise a pinion (44) which is movable between a position of engagement only of the external toothing (36) of the crown and a position of fastening in rotation of the crown (28) and the satellite carriers (24) by meshing of the external teeth (36, 38) of the crown and of the planet carrier.
    [6" id="c-fr-0006]
    6. planetary gear train according to claim 5, characterized in that it produces, in the gear position only of the crown (28), a multiplication of the speed transmitted between the input and the output, and in its position securing in rotation of the crown (28) and the planet carrier (24), a transmission of the speed between the input and the output at the ratio 1: 1.
    [7" id="c-fr-0007]
    7. planetary gear according to one of claims 5 or 6, characterized in that the pinion (44) is mounted on a rod (42) which is axially displaceable in the housing (18), parallel to the axis of the planetary gear , and in that the rod (42) comprises at its outer end a member (17) for controlling the change of the speed ratio and for selecting the desired ratio.
    [8" id="c-fr-0008]
    8. planetary train, according to claim 7, characterized in that the change and the selection of a gear ratio is done by driving the control member (17) into the housing (18) or by pulling the member of the casing (18).
    [9" id="c-fr-0009]
    9. planetary gear train according to one of claims 1 to 8, characterized in that the satellite carriers constitute the input member and the solar (30), the output member.
    [10" id="c-fr-0010]
    10. Method for controlling a rotary actuator member of a device such as a valve, by displacement of the rotary member by rotation of a manual actuation flywheel (11), between an open position (O ) of the valve and a closed position (F) of the valve, the displacement from the open position into the closed position comprising a first phase of approach (a) to the closed position in which the torque required for closing the valve is relatively low and a second phase (b) of making the closure, in which the required torque increases sharply, characterized in that provision is made during the first approach phase (a) by compared to the second phase (b), a multiplication of the number of turns between the flywheel and the rotary member, using a planetary gear (16) according to one of claims 1 to 9.
    [11" id="c-fr-0011]
    11. Method according to claim 10, characterized in that one uses during the second phase (b) of the race, the planetary gear in its configuration in which the crown (28) and the planet carrier (24) are secured in rotation by the pinion (44) of the control means (40) and during the first phase (a) in its configuration in which the crown (28) is detached from the planet carrier (24).
    [12" id="c-fr-0012]
    12. Servomotor system for controlling an actuator member of a valve for opening and closing a pipe, by means of a worm device (18) driving a toothed wheel (9), which is provided with a manual control flywheel (11) of the actuating member, characterized in that it comprises a planetary gear (16) according to one of claims 1 to 9 which is interposed between the flywheel (11) and the worm (8).
    [13" id="c-fr-0013]
    13. System according to claim 12, characterized in that it implements the method according to one of claims 10 and 11.
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    FR3072746B1|2021-02-12|
    KR20190044479A|2019-04-30|
    EP3473888B1|2020-11-18|
    US20190120330A1|2019-04-25|
    KR102193391B1|2020-12-21|
    RU2694876C1|2019-07-17|
    CN109695684A|2019-04-30|
    ES2847830T3|2021-08-04|
    EP3473888A1|2019-04-24|
    US10655708B2|2020-05-19|
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    法律状态:
    2019-04-26| PLSC| Publication of the preliminary search report|Effective date: 20190426 |
    2019-10-23| PLFP| Fee payment|Year of fee payment: 3 |
    2020-10-15| PLFP| Fee payment|Year of fee payment: 4 |
    2021-10-05| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1759946|2017-10-20|
    FR1759946A|FR3072746B1|2017-10-20|2017-10-20|EPICYCLOIDAL TRAIN ADVANTAGEALLY FOR A SERVOMOTOR SYSTEM, PROCESS AND SERVOMOTOR SYSTEM USING SUCH EPICYCLOIDAL TRAIN|FR1759946A| FR3072746B1|2017-10-20|2017-10-20|EPICYCLOIDAL TRAIN ADVANTAGEALLY FOR A SERVOMOTOR SYSTEM, PROCESS AND SERVOMOTOR SYSTEM USING SUCH EPICYCLOIDAL TRAIN|
    US15/846,355| US10655708B2|2017-10-20|2017-12-19|Epicyclic gear train, advantageously for a servomotor system, method and servomotor system using such an epicyclic gear train|
    ES17209649T| ES2847830T3|2017-10-20|2017-12-21|Epicyclic train advantageously for a servomotor system, method and servomotor system using said epicyclic train|
    EP17209649.7A| EP3473888B1|2017-10-20|2017-12-21|Planetary gearset, advantageously for a servo system, and servo system and method using such a planetary gearset|
    RU2018101170A| RU2694876C1|2017-10-20|2018-01-14|Planetary tooth gear, mainly for servo motor system, method and system of servo motor using such planetary gear transmission|
    KR1020180027025A| KR102193391B1|2017-10-20|2018-03-07|Epicycle gear train, advantageously for a servomotor system, method and servomotor system using such an epicyclic gear train|
    CN201810369023.8A| CN109695684A|2017-10-20|2018-04-23|It is advantageously used in planetary gear train, method and the servo electrical machinery system using the planetary gear train of servo electrical machinery system|
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