WO2024045946A1

WO2024045946A1 - Elastic torsional damper

Info

Publication number: WO2024045946A1
Application number: PCT/CN2023/108595
Authority: WO
Inventors: 汪国胜; 陈博; 汪林昕; 戴巨川; 陈哲吾
Original assignee: 潜山天柱盛唐机电科技发展有限公司; 湖南科技大学
Priority date: 2022-08-31
Filing date: 2023-07-21
Publication date: 2024-03-07
Also published as: CN115435045A

Abstract

An elastic torsional damper, comprising: an input part (4), an output part (1), and a plurality of elastic parts connected to the input part and the output part. The input part is located in the output part, one end of each elastic part is rotatably connected to the outer side of the input part, and the other end of the elastic part is rotatably connected to the inner side of the output part, each elastic part comprises a plurality of leaf spring groups (6), and the plurality of leaf spring groups are circumferentially arranged between the input part and the output part at equal intervals. The input part and the output part of the elastic torsional damper can swap functions; an engine (or a prime motor) drives the input part to move, the input part drives the output part to move, and when the revolution speed of the engine (or the prime motor) is uneven, the elastic parts generate elastic deformation to realize the torsional damping effect; and when the rigidity of the elastic torsional damper needs to be changed, only the number or the thickness of the elastic parts needs to be changed, such that the size of the elastic torsional damper is not changed, and the elastic torsional damper is not destabilized.

Description

An elastic torsional buffer

Technical field

The present invention relates to the technical field of torsional buffers, and in particular to an elastic torsional buffer.

Background technique

Torsional buffers are widely used in the connection between the prime mover (or engine) and the transmission box or output box to buffer the torsional vibration or impact of the prime mover (or engine). For example, in wind turbines, wind gusts cause torsional vibration of the wind turbine impeller. This torsional vibration causes impact between the transmission gears in the speed increase box, causing pitting corrosion and fatigue damage, and reducing the service life; for high-power large-scale devices , the torque vibration and impact output by the prime mover (or engine) are large, and rubber torsion buffers or torsion buffers with multiple metal shrapnel stacked together are often used. However, rubber torsion buffers have poor temperature adaptability and short lifespan; when using For metal laminated spring torsion buffers, the number of laminations can be increased or reduced to obtain the required stiffness. However, increasing the number will easily cause changes in its installation dimensions, and when the number is small, the entire buffer will be thinner and prone to instability. .

Contents of the invention

The object of the present invention is to provide an elastic torsional buffer to solve the above-mentioned problems existing in the prior art.

In order to achieve the above object, the present invention provides the following solution: the present invention provides an elastic torsion buffer, including: an input part and an output part, and a plurality of elastic parts connecting the input part and the output part, the input part is located in the output part, one end of the elastic part is rotatably connected to the outside of the input part, and the other end of the elastic part is connected to the output part. The elastic part includes a plurality of leaf spring groups, and the plurality of leaf spring groups are arranged at equal intervals in the circumferential direction between the input part and the output part.

Preferably, the output part includes a first flange, an installation cavity is provided on one side of the first flange, and a first installation groove is provided in the circumference of the side wall of the installation cavity, and the input part It is arranged in the installation cavity, and one end of the elastic part is rotationally connected in the first installation groove.

Preferably, the input part includes a second flange, the second flange is rotatably installed in the installation cavity and is coaxially arranged with the first flange, and the second flange is A second installation groove is circumferentially formed on the outer edge, and the other end of the elastic part is rotatably connected in the second installation groove.

Preferably, the leaf spring group includes two leaf springs, the two leaf springs are arranged symmetrically about the center, the leaf springs are installed along the rotational driving direction of the second flange, and the leaf springs bear tensile force, Both ends of the leaf spring are fixed with mounting rings, the mounting ring at one end of the leaf spring is rotatably connected in the first mounting groove, and the mounting ring at the other end of the leaf spring is rotatably connected in the first mounting groove. into the second installation slot.

Preferably, a plurality of first mounting holes are circumferentially opened at the outer edge of the first flange, and the axis of the first mounting hole is parallel to the axis of the first flange. The first mounting holes Penetrating the first mounting groove, a first leaf spring pin is passed through the first mounting hole, and a mounting ring located in the first mounting groove is sleeved on the outside of the first leaf spring pin and connected with the first leaf spring pin. The first leaf spring pin is rotatably connected.

Preferably, a plurality of second mounting holes are circumferentially opened at the outer edge of the second flange, and the axis of the second mounting hole is parallel to the axis of the second flange. The hole penetrates the second mounting slot, and a second leaf spring pin is passed through the second mounting hole. A mounting ring located in the second mounting slot is sleeved on the outside of the second leaf spring pin and connected with the second leaf spring pin. The second leaf spring pin is rotationally connected.

Preferably, the first mounting hole is a step hole, and an end with a larger diameter of the first mounting hole is circumferentially opened in a retaining ring mounting groove, and an elastic retaining ring for the hole is provided in the retaining ring mounting groove, and the The top end of the first leaf spring pin is provided with a shoulder. The shoulder is located at the end of the first mounting hole with a larger diameter. The shoulder is located away from the opening of the first mounting hole using a resilient retaining ring. side.

Preferably, the number of the first mounting holes, the second mounting holes and the leaf springs is the same.

Preferably, power is input from the output part and output from the input part.

Preferably, the leaf spring group includes leaf springs, the leaf springs are installed along the rotational driving direction of the second flange, and the leaf springs bear tensile force.

The invention discloses the following technical effects:

In the present invention, the input part is arranged inside the output part and is connected to the output part through an elastic part; the engine (or prime mover) drives the input part to rotate, and the input part drives the output part to rotate. When the engine (or prime mover) rotates at an uneven speed, , the elastic part produces elastic deformation to achieve the function of torsion buffering; when it is necessary to change the stiffness of the elastic torsion buffer of the present invention, it is only necessary to change the number of elastic parts or the thickness of the elastic part, and the size of the elastic torsion buffer will not be changed. changes without destabilizing the elastic torsional buffer. At the same time, the input part and the output part in the present invention can be interchanged. When workers use the device of the present invention, the input part can be used as the output part and the output part can be used as the input part according to actual needs.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the drawings of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a front view of an elastic torsional buffer according to the present invention;

Figure 2 is a rear view of an elastic torsional buffer according to the present invention;

Figure 3 is a cross-sectional view along the A-A direction in Figure 2;

Figure 4 is a cross-sectional view along the C-C direction in Figure 3;

Figure 5 is a partial enlarged view of position A in Figure 3;

Figure 6 is a force diagram of the leaf spring 6 in the present invention;

Figure 7 is a schematic structural diagram of Embodiment 2 of the present invention;

Among them, 1. First flange; 2. Installation cavity; 3. First installation groove; 4. Second flange; 5. Second installation groove; 6. Leaf spring; 7. Installation ring; 8. One mounting hole; 9. The first leaf spring pin; 10. The second mounting hole; 11. The second leaf spring pin; 12. The elastic retaining ring for the hole; 13. The first shaft body; 14. The second shaft body; 15 , end cap.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts, All belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Referring to Figures 1-6, the present invention provides an elastic torsion buffer, including: an input part and an output part, and several elastic parts connecting the input part and the output part. The input part is located in the output part, and one end of the elastic part is connected to the input part. The outside of the elastic part is rotatably connected, and the other end of the elastic part is rotatably connected with the inside of the output part. The elastic part includes a plurality of leaf spring groups, and several leaf spring groups are arranged at equal intervals in the circumferential direction between the input part and the output part.

In this device, the input part is arranged in the output part and is connected to the output part through an elastic part; the engine (or prime mover) drives the input part to rotate, and the input part drives the output part to rotate. When the engine (or prime mover) rotates unevenly, , the leaf spring group produces elastic deformation to realize the torsion buffering function; when it is necessary to change the stiffness of the elastic torsion buffer of the present invention, only the number of leaf spring groups needs to be changed, and the size of the elastic torsion buffer will not be changed. At the same time, the elastic torsion buffer will not be unstable.

To further optimize the solution, the output part includes a first flange 1. An installation cavity 2 is provided on one side of the first flange 1. A first installation groove 3 is provided in the circumferential direction of the side wall of the installation cavity 2. The input part is provided on In the installation cavity 2, one end of the elastic part is rotatably connected in the first installation groove 3.

To further optimize the solution, the input part includes a second flange 4. The second flange 4 is rotatably installed in the installation cavity 2 and is coaxially arranged with the first flange 1. The outer edge of the second flange 4 is located around A second installation groove 5 is opened in the direction, and the other end of the elastic part is rotatably connected in the second installation groove 5 .

To further optimize the solution, the leaf spring group includes two leaf springs 6, and the two leaf springs 6 are arranged symmetrically about the center. The leaf spring 6 is installed along the rotational driving direction of the second flange 4. The leaf spring 6 bears the tensile force. Both ends of the leaf spring 6 are fixedly connected with mounting rings 7. The mounting ring 7 at one end of the leaf spring 6 is rotatably connected to the In the first mounting groove 3 , the mounting ring 7 at the other end of the leaf spring 6 is rotatably connected in the second mounting groove 5 . Two adjacent leaf springs 6 form a leaf spring group, and several leaf spring groups are arranged at equal intervals in the circumferential direction between the outer wall of the second flange 4 and the inner wall of the first flange 1, so that the second flange 4. When rotating forward or reverse in the first flange 1, the force on the entire device is exactly the same.

In a further optimization solution, the connection method between the leaf spring 6 and the second flange 4 and the first flange 1 is preferably pin connection.

To further optimize the solution, a number of first mounting holes 8 are circumferentially opened at the outer edge of the first flange 1. The axis of the first mounting holes 8 is parallel to the axis of the first flange 1. The first mounting holes 8 penetrate through the first flange 1. A mounting slot 3. A first leaf spring pin 9 is inserted through the first mounting hole 8. The mounting ring 7 located in the first mounting slot 3 is sleeved on the outside of the first leaf spring pin 9 and connected with the first leaf spring pin. 9 Turn the connection.

To further optimize the solution, a number of second mounting holes 10 are circumferentially opened at the outer edge of the second flange 4. The axis of the second mounting hole 10 is parallel to the axis of the second flange 4. The second mounting holes 10 penetrate through the second flange 4. The second mounting slot 5 has a second leaf spring pin 11 passing through the second mounting hole 10. The mounting ring 7 located in the second mounting slot 5 is sleeved on the outside of the second leaf spring pin 11 and connected with the second leaf spring pin. 11 Turn the connection.

To further optimize the solution, the first mounting hole 8 is a step hole, and the end with a larger diameter of the first mounting hole 8 is circumferentially opened in the retaining ring mounting groove, and a resilient retaining ring 12 for the hole is provided in the retaining ring mounting groove, and the first leaf spring The top of the pin 9 is provided with a shoulder. The shoulder is located at the larger diameter end of the first mounting hole 8 . The shoulder is located on the side of the hole elastic retaining ring 12 away from the opening of the first mounting hole 8 .

In a further optimized solution, the number of the first mounting holes 8 , the second mounting holes 10 and the leaf springs 6 are the same.

When this device is in use, the staff can decide to use the first flange 1 as the output flange, the second flange 4 as the input flange, or the first flange 1 as the input method according to actual needs. The second flange 4 is used as the output flange.

To further optimize the solution, an end cover 15 is provided at the opening of the installation cavity 2. The end cover 15 is fixed to one side of the first flange 1 through bolts, and a sealing gasket is provided between the end cover 15 and the first flange 1. , so arranged that the second flange 4 can only rotate around the axis in the installation cavity 2; annular grooves are provided on both sides of the second flange 4, the two annular grooves are coaxially arranged, and the annular groove is close to the second method A lubrication groove is provided on the side wall of the outer edge of the orchid plate 4, a first swivel is fixed on the inner edge of the end cover 15, and a second swivel is fixed on the bottom wall of the installation cavity 2. The two swivel rings and the annular groove are coaxially arranged. The outer walls of the first swivel ring and the second swivel ring are in sliding contact with the inner walls of the two annular grooves respectively, and the lubricating groove is closed. The lubricating groove is filled with hydraulic oil, so set so that the second flange 4 can rotate more smoothly in the installation cavity 2; the side of the first flange 1 away from the end cover 15 is connected with a second shaft 14 through bolts, and the second shaft 14 is connected to the first The flange 1 is arranged coaxially, and a number of first limiting teeth are provided at equal intervals in the circumferential direction on the inner edge of the second flange 4. A first shaft 13 is installed on the inner edge of the second flange 4. The outer wall of the shaft body 13 is provided with a number of second limiting teeth. The first limiting teeth mesh with the second limiting teeth. The first shaft body 13 and the second flange 4 are coaxially arranged. The end passes through the end cover 15. In this device, the first shaft 13, the second shaft 14, the first flange 1 and the second flange 4 are all coaxially arranged. The device passes through the first shaft 13 And the second shaft body 14 is connected with external equipment.

In the present invention, the second flange 4 is installed in the installation cavity 2 on the first flange 1. The second flange 4 and the first flange 1 are connected through a plurality of leaf springs 6. The leaf springs 6 Mounting rings 7 are fixedly connected to both ends of the same leaf spring 6. The mounting ring 7 at one end of the same leaf spring 6 is pinned in the first mounting groove 3 through the first leaf spring pin 9, and the other mounting ring 7 is pinned through the second leaf spring pin 11. Connected in the second mounting slot 5, the leaf spring 6 is a typical two-force rod part. The engine (or prime mover) outputs power to the second flange 4, and the second flange 4 outputs power to the first flange 1 through the leaf spring 6. In this process, due to the installation direction of the leaf spring 6 Along the rotation direction of the second flange 4, the leaf spring 6 is always in a stretched state during the power transmission process. Refer to Figure 6. In Figure 6, F is the tensile force exerted by the leaf spring 6, and h is the mounting ring 7. The vertical distance from the protruding point of the leaf spring 6. When the leaf spring 6 is in the maximum tensile state, h is close to 0. When the tension of the leaf spring 6 decreases, the leaf spring 6 returns to its original arc or continues to bend, and h becomes larger. ; In this device, the leaf spring 6 will not undergo negative deformation with h less than 0, and always maintains a positive bending deformation state, preventing the leaf spring 6 from undergoing positive and negative alternating deformation, and improving the fatigue life of the leaf spring 6 .

Beneficial effects of the present invention: The present invention can effectively slow down the torsional vibration transmitted from the input end to the output end. For example, the torsional vibration of the impeller caused by wind gusts in a wind turbine is transmitted to the torsional vibration of the speed increase box and the generator, and the engine periodic forced torsional vibration transmission Torsional vibrations to the transmission case.

Example 2

Referring to Figure 7, the difference from Embodiment 1 is that in this embodiment, the first mounting holes 8 are opened at equal intervals in the circumferential direction at the outer edge of the first flange 1, and the second mounting holes 10 are opened at equal intervals in the circumferential direction. At the outer edge of the second flange 4, a number of leaf springs 6 are arranged at equal intervals in the circumferential direction. Between one flange 1 and the second flange 4.

In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation and is therefore not to be construed as a limitation of the invention.

The above-described embodiments only describe the preferred modes of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, those of ordinary skill in the art can make various modifications to the technical solutions of the present invention. All deformations and improvements shall fall within the protection scope determined by the claims of the present invention.

Claims

An elastic torsion buffer, characterized in that it includes: an input part and an output part, and several elastic parts connecting the input part and the output part, the input part is located in the output part, and the elastic part One end of the elastic part is rotatably connected to the outside of the input part, and the other end of the elastic part is rotatably connected to the inside of the output part. The elastic part includes a plurality of leaf spring groups, and a plurality of the leaf spring groups are arranged at equal intervals in the circumferential direction. between the input part and the output part.
The elastic torsional buffer according to claim 1, characterized in that: the output part includes a first flange (1), and an installation cavity (2) is opened on one side of the first flange (1). , a first installation groove (3) is opened in the circumferential direction of the side wall of the installation cavity (2), the input part is arranged in the installation cavity (2), and one end of the elastic part is rotationally connected to the into the first mounting slot (3).
The elastic torsional buffer according to claim 2, characterized in that: the input part includes a second flange (4), and the second flange (4) is rotatably installed in the installation cavity (2) Inside and coaxially arranged with the first flange (1), a second mounting groove (5) is circumferentially opened at the outer edge of the second flange (4), and the other end of the elastic part Rotatingly connected in the second installation groove (5).
The elastic torsion buffer according to claim 3, characterized in that: the leaf spring group includes two leaf springs (6), the two leaf springs (6) are arranged symmetrically about the center, and the leaf springs (6) follow the The second flange (4) is installed in the rotational driving direction, and the leaf spring (6) bears the tensile force. Both ends of the leaf spring (6) are fixedly connected with mounting rings (7). The mounting ring (7) at one end of the leaf spring (6) is rotatably connected in the first mounting groove (3), and the mounting ring (7) at the other end of the leaf spring (6) is rotatably connected in the first mounting groove (3). Second mounting slot (5)Within.
The elastic torsion buffer according to claim 4, characterized in that: a plurality of first mounting holes (8) are circumferentially opened at the outer edge of the first flange (1), and the first mounting holes (8) The axis of 8) is parallel to the axis of the first flange (1), the first mounting hole (8) penetrates the first mounting groove (3), and the first mounting hole (8) passes through A first leaf spring pin (9) is provided, and a mounting ring (7) located in the first mounting groove (3) is sleeved on the outside of the first leaf spring pin (9) and connected with the first plate. The spring pin (9) is connected by rotation.
The elastic torsion buffer according to claim 5, characterized in that: a plurality of second mounting holes (10) are circumferentially opened at the outer edge of the second flange (4), and the second mounting holes (10) The axis of 10) is parallel to the axis of the second flange (4), the second mounting hole (10) penetrates the second mounting groove (5), and the second mounting hole (10) passes through A second leaf spring pin (11) is provided, and a mounting ring (7) located in the second mounting groove (5) is sleeved on the outside of the second leaf spring pin (11) and connected with the second plate spring pin (11). The spring pin (11) is connected by rotation.
The elastic torsional buffer according to claim 6, characterized in that: the first mounting hole (8) is a step hole, and an end with a larger diameter of the first mounting hole (8) is circumferentially opened for mounting the retaining ring. groove, the retaining ring installation groove is provided with a hole elastic retaining ring (12), the top end of the first leaf spring pin (9) is provided with a shoulder, and the shoulder is located in the first installation hole (8 ) at the end with a larger diameter, the shoulder is located on the side of the hole elastic retaining ring (12) away from the opening of the first mounting hole (8).
The elastic torsional buffer according to claim 6, characterized in that: the first mounting holes (8), the second mounting holes (10) and the leaf springs (6) are in equal numbers. same.
The elastic torsion buffer according to claim 1, wherein power is input from the output part and output from the input part.
The elastic torsional buffer according to claim 1, characterized in that: the leaf spring group includes a leaf spring (6), and the leaf spring (6) is driven along the rotation of the second flange (4). When installed in the direction, the leaf spring (6) bears tensile force.