• 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 elastic transition for the dynamic connection between the motor side and the head of a sliding piece adapter or between the adapter and the rollers of a rolling mill consists of a center pin (5) which is arranged perpendicular to the longitudinal axis of the adapter (3), several sliding pieces (4) which over the pin (5) are connected to the adapter (3), a block (1) attached to the flange (2) and two interfacially connected and complementary series of dampers (6) connected to the pin (5). This will ensure a reduction in the axial stresses transmitted along the adapter in response to stresses occurring during rolling.
    公开号:AT16770U1
    申请号:TGM50067/2019U
    申请日:2014-02-26
    公开日:2020-08-15
    发明作者:Donadon Andrea
    申请人:Danieli & C Officine Mecchaniche S P A；
    IPC主号:
    专利说明:

    description
    "ELASTIC TRANSITION FOR SLIDING PIECE ADAPTER"
    FIELD OF THE INVENTION
    The present invention relates to a load damping system that is applicable to slider adapters used to transmit motions generated by a motor connected thereto. Such a system is used, for example, in the transmission of the movement from the motors to the rollers of a rolling stand for flat products. In particular, the present invention relates to an elastic transition for the dynamic transition between the motor side and the adapter head or between the adapter and rollers in order to ensure the reduction of the axial stresses which are transmitted along the adapter in response to stresses occurring during the rolling.
    STATE OF THE ART
    Two types of slider adapters are known in the art: fixed adapters and telescopic adapters. The former form a rigid body, while the latter have the possibility of varying the axial extent of it. In the exemplary case of a rolling mill, this second solution enables the rolls or rolling cylinders to be moved. It is disadvantageous that both types of adapters, in particular fixed adapters, transfer the axial component of the load that occurs during rolling to the motor. For example, the rolling stand can generate axial forces due to various phenomena of the rolling process, which can be transmitted from the rolling cylinders to the motor via the adapter. The ends of the work rolls of the stand, on the side opposite the side of the adapter, are housed in a chock. There is a given clearance between the chock and the associated fixed shoulder, which as a rule has a nominal value of approx. 1 mm, while it can actually reach 3 to 4 mm, which results from the sum of tolerances and also due to possible wear results over time.
    The thrust bearings of the motors have for reasons of the intrinsic function of the motors in general on an axial play limited to +0.35 mm, which can therefore still be influenced by the axial loads generated by the roll stand, since the axial play between chocks and shoulders is greater than that of the thrust bearing of the motor.
    Thus, the axial forces occurring during rolling close such a game, and these forces are then transmitted to the motors via the adapter. These loads are detrimental to the motors, which, precisely in order to counter these loads, are usually equipped with radial or axial bearings, which are dimensioned according to the maximum load, since failure of these bearings would lead to the motor being shut down.
    In plants of this size and these characteristics, for example in rolling mills, the main motors for production are absolutely vital, and it is therefore essential to prevent the failure of these elements, which can also lead to months of downtime, because often For components of this type and size (motors in the power range of up to 10,000 kW) no spare parts are available at short notice. A plant downtime is obviously the most negative factor that a manufacturer can experience as it brings with it a loss of productivity. To avoid this, overdimensioning the thrust bearings of a motor is preferred, even if this entails a considerable increase in the overall effort: Both radial and thrust bearings are very expensive and their size has a consistent effect on the overall costs of motors. According to the state of the art, the transitions between the slide adapters and the flanges on the roll side or on the motor side essentially consist of axially rigid systems which, due to such rigidity, transfer all loads from the roll stand to the motor. That is, the adapter interfaces are generally limited by a rigid constraint on the constituent
    Parts achieved.
    A first example of such a system is provided in document US7582019B2 in which two sections of an adapter are interconnected by a system for balancing the axial forces which provides for the use of cylindrical longitudinal dampers located both inside and outside the transition . The inner cylinders consist of a guide jacket in which a slide damper element can move, the linear movement of which takes place along the longitudinal axis of the adapter. This frictional, non-rotatable connection is coupled to the outer cylindrical dampers, which absorb the axial forces and prevent the two interconnected segments of the adapter from rotating. In this way, however, this double connection has a stiffness that prevents effective absorption of the transverse and torsional stresses that usually affect the normal operation of the adapter. This gives the system a lack of elasticity precisely where the greatest stresses are generated from the rolling system.
    A second axially rigid connection system is described in document US7784380. The system comprises the use of a connection between a flange and the head of an adapter consisting of a housing block which is rigidly attached to the end of the adapter and in which a pressure beam is arranged in the longitudinal direction. The alignment and shape of the beam are designed to withstand and balance the axial thrust and traction loads, while its angular movement is limited by the structural degree of freedom of the housing block. This solution, too, is therefore impaired by the transverse rigidity and torsional rigidity, which do not allow the elastic absorption of all stresses and loads to which the adapter head is exposed.
    In document DE 26 56 257 A1, a transition point is disclosed in which sliding pieces are provided which are connected to an adapter via a center pin.
    Thus, in the cases described above, as in any other solution currently used in the art, there is a lack of a component essential for effectively reducing the loads placed on the adapter, i. E. the elastic and multidirectional response to such loads, which can effectively reduce the risk to the integrity of the transition points and especially the motors.
    SUMMARY OF THE INVENTION
    The aim of the present invention is to provide an elastic transition for sliding piece adapters with which an effective compensation and absorption of the forces transmitted by the rolling system to the motors is possible.
    Another object of the present invention is to provide a transition for slider adapters that allows the transmission of only a certain predetermined maximum force axially to the motors.
    Another object of the present invention is to provide a transition for slide adapters that allows the use of a smaller thrust bearing compared to those currently in use.
    With the present invention, the aforementioned objects can be achieved through the use of a transition point of an adapter with a flange for controlling the axial loads, which claim 1 according to a center pin arranged perpendicular to the longitudinal axis of the adapter, several Gileit pieces that over the center pin with slidably connected to the adapter, a block attached to the flange and at least two complementary and interfacially connected series of dampers connected to the center pin.
    According to a further aspect of the invention, a rolling mill is provided which, according to claim 8, comprises at least one motor, at least one adapter for transmitting the motor movement to the rolls of a rolling stand, the aforementioned elastic transition for connecting the adapter on the motor side or on the Scaffolding side or both on the
    Motor side as well as on the stand side is used, wherein the motor and / or the rolling stand comprise a flange which is designed for fastening the block of the elastic transition.
    The elastic transition for slider adapter, object of the present invention, allows the control of the axial forces that result from the operation of the rolling mill and the transfer of only a certain, clearly defined and controllable load on the corresponding motor, which is much less than the load that would be transferred by other currently known solutions to the point of almost eliminating the same load.
    The device, object of the present invention, uses the adapter in fact as an elastic element with the properties of a spring which acts in the axial direction and thus transfers known and clearly definable loads.
    The introduction of an elastic element, compared to a spring characterized by an elastic constant k, makes it possible to fix the axial loads reaching the motor at a certain value equal to Ax * k, where Ax is the clearance between the chock and shoulder.
    It is therefore possible to design the thrust bearing of the motor for this force and not for the entire axial force F that can arise during rolling.
    [0019] The dependent claims describe preferred embodiments of the invention.
    BRIEF DESCRIPTION OF THE FIGURES
    Further features and advantages of the invention will emerge from the detailed description of a preferred, but not exclusive embodiment of a transition point of an adapter to a flange, which is shown as a non-limiting example with the help of the accompanying drawings, in which:
    Fig. 1a shows a longitudinal sectional view of a transition according to the invention for connecting an adapter to the flange of a motor,
    Fig. 19 shows a sectional view along a plane A-A of the elastic transition in Fig. 1a,
    Fig. 1c shows an exploded view of an enlarged section of the flange with a hinge for the block and relative attachment points,
    Fig. 2 shows a transition according to the present invention applied to slide adapters for a rolling mill,
    Figure 3 shows a perspective view of the components of the transition according to the present invention.
    The same reference numbers in the figures identify the same elements or components.
    DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
    As shown in Fig. 1a, the device according to the present invention therefore consists of an elastic transition for connecting an adapter 3 for controlling the axial loads, consisting of the following parts:
    a block 1 which includes: a center pin 5 which is arranged perpendicular to the longitudinal axis of the adapter 3,
    - At least two complementary and interfacially connected dampers 6, which are connected with pin 5,
    Sliders 4 which are connected to the adapter 3 by means of a pin 5, the sliders 4 having sliding surfaces on corresponding, complementary shaped surfaces of the flange 2.
    In Fig. 1a only two complementary and interfacially connected series of dampers 6 are provided. In particular, two pairs of dampers 6 are provided, each accommodated in a corresponding seat in block 1 (see FIG. 1c). In each pair, the two dampers 6 are arranged along an axis and are arranged symmetrically to one another with respect to a first plane containing the longitudinal axis of the pin 5. In addition, the two pairs of dampers, one pair being arranged above the other pair, are arranged symmetrically to one another with respect to a second plane, perpendicular to the first plane, which contains the longitudinal axis of the adapter 3.
    Block 1 is provided with spring assemblies 6 which are arranged on both sides so that they act in both directions. Block 1 is fitted in the flange 2 to which the adapter 3 has to couple, and finally the adapter 3 is integrated into the block 1 by means of a pin 5.
    The sliders 4 are then connected by means of pin 5 to the flange 2 and the adapter 3 and enable the transmission of the torque from the first (flange) to the second (adapter).
    The axial stresses coming, for example, from the rolling cylinders are transmitted to the adapter 3, to the pin 5 and thus to the block 1. The spring assemblies 6 in the interior of block 1 are thus compressed on one side and correspondingly elongated on the opposite side, so that the flange 2 remains stationary when the adapter 3, pin 5 and sliding pieces 4 are moved accordingly. The device is bidirectional, i.e. it intervenes on the adapter 3 in the event of both tensile forces and thrust forces.
    The sliders 4 restricted to the pin 5 are then driven by e.g. force generated in the roll stand shifted axially, but they are in contact with the flange 2; In order to achieve this relative movement between the sliders 4 and flange 2, it is necessary to overcome the frictional forces that arise between the two elements as a result of the torque transmitted from the flange 2 to the adapter 3 by means of the sliders 4. This ensures that the device, object of the invention, is activated only when necessary, i. E. only if the loads involved exceed the frictional forces between flange 2 and sliders 4.
    Fig. 1b shows a section along the plane A-A of the elastic transition shown in Fig. 1a.
    The damper 6 can be selected from the solutions customary in the art. In the present case, spring assemblies, hydraulic dampers or a combination thereof are preferably used.
    According to the present invention, block 1 is designed for the connection between adapter 3 and flange 2 of an engine block or, distal to the engine at the opposite end of adapter 3, between adapter 3 and the rolls of a rolling stand.
    The invention also provides the alternative of combining both coupling options (FIG. 2).
    Block 1 also comprises one or more fastening means for fastening the block to the flange 2 or to the rolls of the rolling stand. 1c shows a view of the flange 2 and the joints or fastening points 21 for block 1.
    In order to anchor the pin on the adapter head, pin 5 comprises two connecting ends 5a, 5b which protrude from the sliding pieces 4. These connecting ends 5a, 5b can have a larger cross-sectional diameter than the remaining pin body and are provided with joints for attachment to the adapter 3.
    The transition for slide adapter of the present invention has the essential advantages when used in rolling plants in which the adapters are used to transmit the movement from the motor to the rolls of a rolling stand, as shown schematically in FIG.
    In this specific system configuration, the axis of the adapter 3 is tilted with respect to the longitudinal axis of the flange 2 by an angle α, which can be between 0 and 15 degrees, whereby a degree of freedom is made possible that the effective compensation of any axial load, whether it allows transverse loads or angular loads without damaging the motor side at one end and / or the roller side at the other end.
    This elastic and at the same time articulated movement of the adapter is actually ensured by the position of pin 5, which is always perpendicular to the longitudinal axis of the adapter for each position assumed. In addition, FIG. 2 also shows the alternative embodiment of the invention, according to which the block 1 is also arranged between the distal end of the adapter (distal with respect to the flange 2) and the rolls of the roll stand.
    A possible configuration of the components forming the subject of the present invention is shown in Fig. 3, in which the relative position of the block 1 with respect to the sliders 4 and the ends 5a and 5b of the pin 5 is shown. In this particular embodiment, the ends 5a and 5b of the pin 5 protrude from the upper and lower curved surfaces of the sliders 4 in order to be securely fastened in the corresponding seats of the adapter 3. This ensures that pin 5 is always perpendicular to the axis of adapter 3.
    With the aid of the device, the subject of the present invention, the loads exerted on the adapter are not completely transferred to the motor: it has been shown that they can be reduced by more than 50% compared to the previously chosen solutions, by up to too nearly completely eliminated.
    权利要求:
    Claims (8)
    [1]
    1. Transition point for connecting an adapter (3) to a flange (2) for controlling axial loads, comprising - a center pin (5) which is arranged perpendicular to the longitudinal axis of the adapter (3), - several sliders (4), which over the center pin (5) is slidably connected to the adapter (3)
    who are
    - a block (1) attached to the flange (2), characterized in that at least two interfacially connected and complementary series of dampers (6) are provided which are connected to the pin (5).
    [2]
    2. Transition according to claim 1, wherein the dampers (6) are spring assemblies, hydraulic dampers or a combination thereof.
    [3]
    3. Transition according to claim 1 or 2, wherein the block (1) is arranged for a connection between the adapter (3) and the flange (2) of an engine block or of rolls of a roll stand or of both the engine block and rolls of a roll stand.
    [4]
    4. Transition according to claim 3, wherein the block (1) comprises one or more means for fastening to the flange (2) or to the rolls of the roll stand.
    [5]
    5. Transition according to one of the preceding claims, wherein the pin (5) comprises two connecting ends (5a, 5b) which protrude from the sliders (4).
    [6]
    6. Junction according to claim 5, wherein the connecting ends (5a, 5b) have a cross-sectional diameter which is larger than the remaining pin body.
    [7]
    7. Transition according to claim 5 or 6, wherein the connecting ends (5a, 5b) are provided with joints for attachment to the adapter (3).
    [8]
    8. Rolling plant, comprising at least one motor, at least one adapter (3) for transmitting the motor movement to rolls of a rolling stand, characterized in that it also has an elastic transition according to one of claims 1 to 7 for connecting the adapter (3) to the Motor side or on the stand side or both on the motor side and on the stand side, wherein the motor and / or the rolling stand comprise a flange (2) which is designed for fastening the block (1) of the elastic connection.
    4 sheets of drawings
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    引用文献:
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    CN102817927A|2012-07-24|2012-12-12|天驰天新机电技术配套(天津）有限公司|Reinforced crossed shaft universal coupling|EP3560771B1|2018-04-24|2020-11-11|David Robertson|A roll-over protection apparatus|
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    法律状态:
    优先权:
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