Elastic torsion damper

Abstract

This invention discloses an elastic torsional damper, comprising: an input section and an output section, and a plurality of elastic sections connecting the input section and the output section. The input section is located within the output section. One end of each elastic section is rotatably connected to the outer side of the input section, and the other end is rotatably connected to the inner side of the output section. Each elastic section includes a plurality of leaf spring assemblies, which are circumferentially spaced between the input section and the output section. In this invention, the functions of the input section and the output section can be interchanged. The engine (or prime mover) drives the input section to move, and the input section drives the output section to move. When the engine (or prime mover) speed is uneven, the elastic sections undergo elastic deformation, achieving the function of torsional damping. When it is necessary to change the stiffness of the elastic torsional damper, only the number or thickness of the elastic sections needs to be changed; the size of the elastic torsional damper will not change, and the elastic torsional damper will not become unstable.

Description

Technical Field

[0001] This invention relates to the field of torsion damper technology, and in particular to an elastic torsion damper. Background Technology

[0002] Torsional dampers are widely used in the connection between prime movers (or engines) and transmission or output boxes to buffer torsional vibrations or impacts of the prime mover (or engine). For example, in wind turbines, gusts of wind cause torsional vibrations in the turbine rotor, which in turn cause impacts between the transmission gears in the speed increaser, resulting in pitting and fatigue damage and reduced service life. For high-power, large-scale installations, the torque vibrations and impacts output by the prime mover (or engine) are significant, and rubber torsional dampers or torsional dampers composed of multiple metal springs stacked together are often used. However, rubber torsional dampers have poor temperature adaptability and short lifespan. When using torsional dampers with stacked metal springs, the number of stacks can be increased or decreased to obtain the required stiffness, but increasing the number can easily change the installation dimensions, and when the number is small, the overall damper thickness is thin, making it prone to instability. Summary of the Invention

[0003] The purpose of this invention is to provide an elastic torsional buffer to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides an elastic torsional buffer, comprising: an input part and an output part, and a plurality of elastic parts connecting the input part and the output part, wherein the input part is located inside the output part, one end of the 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, wherein the elastic part includes a plurality of leaf spring groups, and the plurality of leaf spring groups are circumferentially and equally spaced between the input part and the output part.

[0005] Preferably, the output part includes a first flange, a mounting cavity is formed on one side of the first flange, a first mounting groove is formed circumferentially on the side wall of the mounting cavity, the input part is disposed in the mounting cavity, and one end of the elastic part is rotatably connected in the first mounting groove.

[0006] Preferably, the input part includes a second flange, which is rotatably mounted in the mounting cavity and coaxially arranged with the first flange. A second mounting groove is circumferentially formed on the outer edge of the second flange, and the other end of the elastic part is rotatably connected in the second mounting groove.

[0007] Preferably, the leaf spring assembly includes two leaf springs, which are symmetrically arranged at the center. The leaf springs are installed along the rotational driving direction of the second flange. The leaf springs bear tensile force, and mounting rings are fixed to both ends of each leaf spring. The mounting ring at one end of the leaf spring is rotatably connected to the first mounting groove, and the mounting ring at the other end of the leaf spring is rotatably connected to the second mounting groove.

[0008] Preferably, a plurality of first mounting holes are circumferentially formed on the outer edge of the first flange, the axis of the first mounting holes is parallel to the axis of the first flange, the first mounting holes penetrate the first mounting groove, a first leaf spring pin is inserted in 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 rotatably connected to the first leaf spring pin.

[0009] Preferably, a plurality of second mounting holes are circumferentially provided on the outer edge of the second flange, the axis of the second mounting holes is parallel to the axis of the second flange, the second mounting holes penetrate the second mounting groove, a second leaf spring pin is provided in the second mounting hole, and a mounting ring located in the second mounting groove is sleeved on the outside of the second leaf spring pin and rotatably connected to the second leaf spring pin.

[0010] Preferably, the first mounting hole is a stepped hole, and the larger diameter end of the first mounting hole is circumferentially formed in the retaining ring mounting groove. A retaining ring for the hole is provided in the retaining ring mounting groove. A shoulder is provided at the top of the first leaf spring pin. The shoulder is located at the larger diameter end of the first mounting hole and is located on the side of the retaining ring for the hole away from the opening of the first mounting hole.

[0011] Preferably, the number of the first mounting hole, the second mounting hole, and the leaf spring are the same.

[0012] Preferably, power is input from the output section and output from the input section.

[0013] Preferably, the leaf spring assembly includes a leaf spring, which is installed along the rotational drive direction of the second flange, and the leaf spring bears tensile force.

[0014] The present invention discloses the following technical effects:

[0015] In this invention, the input section is located inside the output section and connected to it via an elastic section. The engine (or prime mover) drives the input section to rotate, which in turn drives the output section to rotate. When the engine (or prime mover) rotates unevenly, the elastic section undergoes elastic deformation, achieving a torsional buffering effect. When the stiffness of the elastic torsional buffer needs to be changed, only the number or thickness of the elastic sections needs to be altered; the size of the elastic torsional buffer will not change, nor will it become unstable. Furthermore, the input and output sections can be interchanged. When using the device, the operator can use the input section as the output section and the output section as the input section according to actual needs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of an elastic torsion buffer according to the present invention;

[0018] Figure 2 This is a rear view of an elastic torsion buffer according to the present invention;

[0019] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0020] Figure 4 for Figure 3 A cross-sectional view along the CC direction;

[0021] Figure 5 for Figure 3 A magnified view of a section at point A in the middle;

[0022] Figure 6 This is a schematic diagram of the forces acting on the leaf spring 6 in this invention;

[0023] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0024] Among them, 1. First flange; 2. Mounting cavity; 3. First mounting groove; 4. Second flange; 5. Second mounting groove; 6. Leaf spring; 7. Mounting ring; 8. First mounting hole; 9. First leaf spring pin; 10. Second mounting hole; 11. Second leaf spring pin; 12. Elastic retaining ring for hole; 13. First shaft; 14. Second shaft; 15. End cover. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-6 The present invention provides an elastic torsion buffer, comprising: 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 inside 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 rotatably connected to the inside of the output part. The elastic part includes a plurality of leaf spring groups, which are circumferentially and equally spaced between the input part and the output part.

[0028] In this device, the input section is located inside the output section and is connected to the output section via an elastic section; the engine (or prime mover) drives the input section to rotate, and the input section drives the output section to rotate. When the engine (or prime mover) speed is uneven, the leaf spring assembly generates elastic deformation to achieve the function of torsional buffering; when it is necessary to change the stiffness of the elastic torsional buffer of this invention, it is only necessary to change the number of leaf spring assemblies, without changing the size of the elastic torsional buffer, and without causing the elastic torsional buffer to become unstable.

[0029] The scheme is further optimized. The output part includes a first flange 1. A mounting cavity 2 is opened on one side of the first flange 1. A first mounting groove 3 is opened circumferentially on the side wall of the mounting cavity 2. The input part is set in the mounting cavity 2. One end of the elastic part is rotatably connected in the first mounting groove 3.

[0030] The design is further optimized so that the input part includes a second flange 4, which is rotatably installed in the mounting cavity 2 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 is rotatably connected in the second mounting groove 5.

[0031] Further optimization of the design involves a leaf spring assembly comprising two leaf springs 6, symmetrically arranged at their centers. The leaf springs 6 are installed along the rotational drive direction of the second flange 4, bearing tensile force. Each leaf spring 6 has a mounting ring 7 fixedly connected to both ends. One mounting ring 7 at one end of the leaf spring 6 is rotatably connected to the first mounting groove 3, and the other mounting ring 7 at the other end is rotatably connected to the second mounting groove 5. Two adjacent leaf springs 6 form a leaf spring assembly. Several leaf spring assemblies are circumferentially spaced at equal intervals between the outer wall of the second flange 4 and the inner wall of the first flange 1, ensuring that the force experienced by the entire device remains identical regardless of whether the second flange 4 rotates clockwise or counterclockwise within the first flange 1.

[0032] To further optimize the design, the preferred connection method between the leaf spring 6 and the second flange 4 and the first flange 1 is pin connection.

[0033] In a further optimized design, a plurality of first mounting holes 8 are circumferentially provided on 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 pass through the first mounting groove 3. A first leaf spring pin 9 passes through the first mounting hole 8. The mounting ring 7 located in the first mounting groove 3 is sleeved on the outside of the first leaf spring pin 9 and is rotatably connected to the first leaf spring pin 9.

[0034] In a further optimized design, a number of second mounting holes 10 are circumferentially provided on the outer edge of the second flange 4. The axis of the second mounting holes 10 is parallel to the axis of the second flange 4. The second mounting holes 10 pass through the second mounting groove 5. A second leaf spring pin 11 passes through the second mounting hole 10. The mounting ring 7 located in the second mounting groove 5 is sleeved on the outside of the second leaf spring pin 11 and is rotatably connected to the second leaf spring pin 11.

[0035] Further optimization of the scheme: the first mounting hole 8 is a stepped hole, and the larger diameter end of the first mounting hole 8 is circumferentially opened in the retaining ring mounting groove. The retaining ring mounting groove is provided with a hole elastic retaining ring 12. The top of the first leaf spring pin 9 is provided with a shoulder, which is located at the larger diameter end of the first mounting hole 8 and on the side of the hole elastic retaining ring 12 away from the opening of the first mounting hole 8.

[0036] The design was further optimized so that the number of the first mounting hole 8, the second mounting hole 10, and the leaf spring 6 were the same.

[0037] When using this device, the operator can decide, according to actual needs, whether to use the first flange 1 as the output flange and the second flange 4 as the input flange, or to use the first flange 1 as the input flange and the second flange 4 as the output flange.

[0038] Further optimizing the design, an end cap 15 is installed at the opening of the mounting cavity 2. The end cap 15 is bolted to one side of the first flange 1, and a sealing gasket is placed between the end cap 15 and the first flange 1. This arrangement ensures that the second flange 4 can only rotate around its axis within the mounting cavity 2. Annular grooves are formed on both sides of the second flange 4, and the two annular grooves are coaxially arranged. A lubrication groove is formed on the side wall of the annular groove near the outer edge of the second flange 4. A first rotating ring is fixed to the inner edge of the end cap 15, and a second rotating ring is fixed to the bottom wall of the mounting cavity 2. The first rotating ring, the second rotating ring, and the annular grooves are all coaxially arranged. The outer walls of the first and second rotating rings slide in contact with the inner walls of the two annular grooves, respectively, and seal the lubrication grooves. The lubrication grooves are filled with hydraulic oil. This arrangement ensures that... The second flange 4 rotates more smoothly within the mounting cavity 2. A second shaft 14 is bolted to the side of the first flange 1 away from the end cover 15. The second shaft 14 is coaxial with the first flange 1. Several first limiting teeth are evenly spaced around the inner edge of the second flange 4. A first shaft 13 is installed on the inner edge of the second flange 4. Several second limiting teeth are provided on the outer wall of the first shaft 13. The first limiting teeth mesh with the second limiting teeth. The first shaft 13 is coaxial with the second flange 4. The end of the first shaft 13 protrudes 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 coaxial. This device is connected to external equipment through the first shaft 13 and the second shaft 14.

[0039] In this invention, the second flange 4 is installed in the mounting cavity 2 on the first flange 1. The second flange 4 and the first flange 1 are connected by several leaf springs 6. Each end of a leaf spring 6 is fixedly connected to a mounting ring 7. One mounting ring 7 at one end of the same leaf spring 6 is pinned to the first mounting groove 3 by a first leaf spring pin 9, and the other mounting ring 7 is pinned to the second mounting groove 5 by a second leaf spring pin 11. The leaf spring 6 is a typical two-force member. 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 springs 6. During this process, because the mounting direction of the leaf springs 6 is along the rotation direction of the second flange 4, the leaf springs 6 are always in a stretched state during power transmission. (Refer to...) Figure 6 , Figure 6 In this diagram, F represents the tension force on the leaf spring 6, and h represents the vertical distance between the mounting ring 7 and the protruding point of the leaf spring 6. When the leaf spring 6 is in its maximum tension state, h is close to 0. When the tension force on the leaf spring 6 decreases, the leaf spring 6 returns to its original curvature or continues to bend, and h increases. In this device, the leaf spring 6 will not experience negative deformation with h less than 0, and will always maintain a positive bending deformation state, thus preventing the leaf spring 6 from experiencing alternating positive and negative deformation and improving the fatigue life of the leaf spring 6.

[0040] The beneficial effects of the present invention are: The present invention can effectively reduce the torsional vibration transmitted from the input end to the output end, such as the torsional vibration of the impeller caused by gusts of wind in a wind turbine being transmitted to the speed increaser and the generator, and the torsional vibration of the engine's periodic forced torsional vibration being transmitted to the transmission box.

[0041] Example 2

[0042] Reference Figure 7 The difference from Embodiment 1 is that in this embodiment, the first mounting hole 8 is circumferentially and equally spaced at the outer edge of the first flange 1, the second mounting hole 10 is circumferentially and equally spaced at the outer edge of the second flange 4, and a number of leaf springs 6 are circumferentially and equally spaced between the first flange 1 and the second flange 4.

[0043] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A resilient torsion damper, characterized by The utility model provides a kind of input and output, and a plurality of elastic parts connecting the input and the output, the input is located in the output, one end of the elastic part is rotatably connected with the outside of the input, the other end of the elastic part is rotatably connected with the inside of the output, the elastic part includes a plurality of leaf spring groups, a plurality of the leaf spring groups are circumferentially equidistantly arranged between the input and the output;The leaf spring group includes two leaf springs (6), two the leaf spring (6) center symmetry is arranged, the leaf spring (6) bears tensile force, the overall shape of the leaf spring (6) is arc, both ends of the leaf spring (6) are fixedly connected with mounting ring (7), the mounting ring (7) of the leaf spring (6) one end is rotatably connected in the first mounting groove, the mounting ring (7) of the leaf spring (6) other end is rotatably connected in the second mounting groove. The output includes a first flange plate (1), one side of the first flange plate (1) is provided with a mounting cavity (2), a first mounting groove (3) is circumferentially provided on the side wall of the mounting cavity (2), the input is arranged in the mounting cavity (2), one end of the elastic part is rotatably connected in the first mounting groove (3).

2. The elastic torsion damper according to claim 1, characterized in that: The input includes a second flange plate (4), the second flange plate (4) is rotatably mounted in the mounting cavity (2) and coaxially arranged with the first flange plate (1), a second mounting groove (5) is circumferentially provided at the outer edge of the second flange plate (4), the other end of the elastic part is rotatably connected in the second mounting groove (5).

3. The elastomeric torsion damper of claim 2, wherein: A plurality of first mounting holes (8) are circumferentially provided at the outer edge of the first flange plate (1), the axis of the first mounting hole (8) is parallel to the axis of the first flange plate (1), the first mounting hole (8) penetrates the first mounting groove (3), a first leaf spring pin (9) is arranged in the first mounting hole (8), the mounting ring (7) located in the first mounting groove (3) is arranged outside the first leaf spring pin (9) and rotatably connected with the first leaf spring pin (9).

4. The elastomeric torsion damper of claim 3, wherein: A plurality of second mounting holes (10) are circumferentially provided at the outer edge of the second flange plate (4), the axis of the second mounting hole (10) is parallel to the axis of the second flange plate (4), the second mounting hole (10) penetrates the second mounting groove (5), a second leaf spring pin (11) is arranged in the second mounting hole (10), the mounting ring (7) located in the second mounting groove (5) is arranged outside the second leaf spring pin (11) and rotatably connected with the second leaf spring pin (11).

5. The elastomeric torsion damper of claim 4, wherein: The first mounting hole (8) is a stepped hole, the end with larger diameter of the first mounting hole (8) is circumferentially provided with a check ring mounting groove, a hole elastic check ring (12) is arranged in the check ring mounting groove, the top end of the first leaf spring pin (9) is provided with a shaft shoulder, the shaft shoulder is located at the end with larger diameter of the first mounting hole (8), and the shaft shoulder is located at the side away from the hole of the hole elastic check ring (12).

6. The elastomeric torsion damper of claim 5, wherein: ​ 7. The elastomeric torsion damper of claim 5, wherein: The first mounting hole (8), the second mounting hole (10) and the leaf spring (6) are equal in number.

8. The elastomeric torsional damper of claim 1, wherein: Power is input from the output portion and output from the input portion.

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