Rotor system bending and torsion composite damper

Abstract

This invention relates to a vibration damper for suppressing vibrations generated during rotor system operation. Specifically, it is a combined bending-torsional vibration damper for rotor systems. It comprises a first rotor, an inner torsional damping structure, rolling bearings, an outer bending damping structure, a circular support, and a second rotor. The inner torsional damping structure is positioned above the first and second rotors, within the rolling bearings, and suppresses torsional vibrations generated during rotor system operation. The outer bending damping structure is positioned above the rolling bearings, within the circular support, and suppresses bending vibrations generated during rotor system operation. Rubber rings are incorporated within both the inner and outer torsional damping structures. These rubber rings reduce noise generated during rotor system operation and also provide some vibration damping. This invention suppresses both torsional and bending vibrations generated during rotor system operation, increasing the stability and service life of the rotor system.

Description

Technical Field

[0001] This invention belongs to the field of rotor vibration reduction technology and relates to a rotor system bending-torsional composite vibration damper. Specifically, it reduces the torsional and bending vibrations generated during the operation of the rotor system, thereby increasing the service life of the rotor system and reducing the noise generated during the operation of the rotor system. Background Technology

[0002] Rotor systems are widely used in rotating machinery in aerospace, energy, petrochemical, and transportation industries. With the development of modern industry towards higher efficiency and speed, rotating machinery is becoming increasingly powerful, complex in structure, and operates at higher speeds. Consequently, the reliability and safety of rotating machinery are receiving increasing attention. As a crucial component of large rotating machinery, the rotor system's operational status directly impacts the safety of the entire structure.

[0003] Vibration is one of the main causes of rotor system failures. Vibration not only reduces rotor operating accuracy, increases noise, and affects motion smoothness, but also leads to increased energy consumption, accelerated component wear, and in severe cases, may even cause major accidents. Therefore, effective control of rotor system vibration is of great significance for the safe and efficient operation of the rotor system. However, current rotor system vibration reduction mainly targets unidirectional torsional or bending vibrations, while research on vibration reduction combining these two types of vibration is scarce. Therefore, a combined bending-torsional vibration damper for rotor systems is proposed. Summary of the Invention

[0004] The present invention is a rotor system bending-torsional composite vibration damper, the purpose of which is to better solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: including a first rotor, a rolling bearing, a circular bracket, a second rotor, an outer bending damping structure disposed within the circular bracket, and an inner torsional damping structure disposed on the first rotor and the second rotor;

[0006] The inner torsional vibration damping structure includes: an active disc, an active disc rubber ring, an outer torsional vibration damping spring, an inner torsional vibration damping spring, a driven disc, and a driven disc rubber ring;

[0007] The outer bending damping structure includes: an outer rubber ring, a bending damping piston rod, a rubber piston, a damping oil groove, and a circular bracket;

[0008] The first rotor is connected to the driving disc via a key, and the second rotor is also connected to the driven disc via a key. An annular groove is formed on the side of the driving disc that contacts the inner ring of the rolling bearing, and a rubber ring is fitted into this groove. The driven disc is positioned after the driving disc, and an annular groove is also formed on its side that contacts the inner ring of the rolling bearing, with a rubber ring fitted into it. The driving and driven discs are disposed within the inner ring of the rolling bearing. Four driving disc drive blocks are uniformly welded to the side of the driving and driven discs that are close to each other, and four driven disc drive blocks are also uniformly welded to the side of the driven and driving discs that are close to each other. The external torsional damping spring is shorter than the internal torsional damping spring, and the internal torsional damping spring is fitted inside the external torsional damping spring. The external and internal torsional damping springs are positioned between the driving and driven disc drive blocks. The bottom of the bending vibration damping piston rod has a groove structure, and the outer ring of the rolling bearing is set in the groove. An outer rubber ring is fitted onto the outer ring of the rolling bearing, positioned between the rolling bearing and the groove of the bending vibration damping piston rod. The bending vibration damping piston rod is positioned above the outer rubber ring, and a rubber piston is fitted onto the head of the bending vibration damping piston rod. The head of the bending vibration damping piston rod extends into a damping oil groove, which is evenly distributed on the inner ring of the circular support.

[0009] In some embodiments, the inner torsional damping structure includes: an active disc, an active disc rubber ring, an outer torsional damping spring, an inner torsional damping spring, a driven disc, and a driven disc rubber ring. The first rotor is keyed to the active disc. The inner and outer torsional damping springs are arc-shaped springs, with the inner spring nested within the outer spring. The first rotor transmits power to the active disc, the active disc drive block transmits power to the inner and outer torsional damping springs, then to the driven disc drive block, and finally to the second rotor. The driven disc and the second rotor are also keyed together.

[0010] In some embodiments, the driving disc has an annular groove on its side surface, with the sides of the annular groove forming the groove walls. The annular groove is used to house the driving disc rubber ring. The driven disc also has an annular groove on its side surface, with the sides of the groove forming the groove walls. The annular groove is used to house the driven disc rubber ring. The driving and driven discs are interference-fitted with the rolling bearing.

[0011] In some embodiments, the outer bending vibration damping structure includes: an outer rubber ring, a bending vibration damping piston rod, a rubber piston, a damping oil groove, and a circular bracket. The outer rubber ring is fitted onto the outer ring of the rolling bearing, the bending vibration damping piston rod is disposed on the outer rubber ring, the rubber piston is fitted onto the head of the bending vibration damping piston rod, and the head of the bending vibration damping piston rod is disposed in the damping oil groove. When bending vibration occurs, the head of the bending vibration damping piston rod moves in the damping oil groove, and the damping oil provides a certain damping to prevent the movement of the bending vibration damping piston rod, thereby achieving the effect of vibration damping.

[0012] In some embodiments, the bottom of each bending damping piston rod is a bending damping piston rod groove, each bending damping piston rod head is fitted with a rubber piston, and each bending damping piston rod is spaced apart and independent of each other.

[0013] In some embodiments, each of the damping oil grooves is independent of each other, and there are eight damping oil grooves in total, which are evenly arranged in the inner ring of the circular bracket. Each damping oil groove is provided with an oil supply hole and an oil outlet hole.

[0014] In some embodiments, the damping oil groove is used to store damping oil. Each bending damping piston rod head is fitted with a rubber piston that extends into the damping oil groove and can slide along the inner wall of the damping oil groove.

[0015] In some embodiments, the inner ring of the circular bracket is uniformly provided with eight damping oil grooves, and the circular bracket is fixed to the rotor system platform by a fixing frame.

[0016] In summary, the present invention has the following beneficial effects:

[0017] (1) This invention can effectively suppress bending and torsional vibrations generated during the operation of the rotor system. The inner torsional damping structure can suppress torsional vibrations generated during the operation of the rotor system. The length of the inner torsional damping spring is longer than that of the outer torsional damping spring. The inner torsional damping spring is nested inside the outer torsional damping spring. The inner and outer springs are nested together to transmit motion and force. Thus, the inner and outer torsional damping springs can be connected in parallel or do not interact with each other, so that the torsional stiffness of the inner torsional damping structure changes with the working conditions and load.

[0018] (2) The damper is equipped with several rubber rings. The rubber rings have a certain damping effect and can also reduce the noise generated when the damper is working. In addition, the large friction between the rubber rings and the contact parts can also improve the stability of the entire damper.

[0019] (3) The outer bending damping structure can suppress bending vibrations in all directions in the rotor system. The bottom of the bending damping piston rod has a groove structure, and the outer ring of the rolling bearing is installed in the groove at the bottom of the bending damping piston rod. The groove wall at the bottom of the bending damping piston rod plays a fixing role and can prevent axial movement between the bending damping piston rod and the rolling bearing. The outer rubber ring is installed between the rolling bearing and the bending damping piston rod, which can increase the friction between them and the bending damping piston rod to prevent slippage, and at the same time has a certain vibration reduction and noise reduction effect. The whole device is simple and can effectively extend the service life of the rotor system. Attached Figure Description

[0020] Figure 1 This is a three-dimensional diagram of the overall invention.

[0021] Figure 2 This is an exploded view of the present invention.

[0022] Figure 3 This is a three-dimensional cross-sectional view of part of the present invention.

[0023] Figure 4 This is a schematic diagram of the active disk in this invention.

[0024] Figure 5 This is a schematic diagram of the side structure of the active disk in this invention.

[0025] Figure 6 This is a schematic diagram of the active disk rubber ring fitting into the annular groove of the active disk in this invention.

[0026] Figure 7 This is a schematic diagram of the torsional vibration damping spring in this invention.

[0027] Figure 8 This is a schematic diagram of the driven disk in the invention.

[0028] Figure 9 This is a schematic diagram of the side structure of the driven disk in the invention.

[0029] Figure 10 This is a schematic cross-sectional view of the inner torsional vibration damping section in this invention.

[0030] Figure 11 This is a schematic diagram of the active disc rubber ring and the driven disc rubber ring in this invention.

[0031] Figure 12 This is a schematic cross-sectional view of the damping oil groove in this invention.

[0032] Figure 13 This is a schematic diagram of the bending vibration damping piston rod assembly of the present invention.

[0033] Figure 14 This is a schematic diagram of the circular support in this invention.

[0034] In the diagram: 1. First rotor; 2. Driven disc; 21. Driven disc drive block; 22. Driven disc annular groove; 23. Driven disc annular groove wall; 3. Driven disc rubber ring; 4. Torsional damping outer spring; 5. Torsional damping inner spring; 6. Driven disc; 61. Driven disc drive block; 62. Driven disc annular groove; 63. Driven disc annular groove wall; 7. Driven disc rubber ring; 8. Rolling bearing; 9. Outer rubber ring; 10. Bending damping piston rod; 101. Bending damping piston rod groove; 102. Bending damping piston rod head; 11. Rubber piston; 12. Damping oil groove; 121. Oil supply hole; 122. Oil outlet hole; 123. Damping oil; 13. Circular bracket; 131. Fixing bracket; 14. Second rotor. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this embodiment, a schematic diagram of a rotor system bending-torsional composite vibration damper is shown in Figure 1. It includes an outer bending vibration damping structure disposed within a circular support 13 and an inner torsional vibration damping structure disposed above the first rotor 1 and the second rotor 14, within a rolling bearing 8.

[0040] The inner torsional vibration damping structure includes an active disc 2, an active disc drive block 21, an active disc rubber ring 3, an outer torsional vibration damping spring 4, an inner torsional vibration damping spring 5, a driven disc 6, a driven disc drive block 61, and a driven disc rubber ring 7. The active disc 2 is disposed within the inner ring of the rolling bearing 8 and mounted on the first rotor 1. The driven disc 6 is disposed after the active disc 2, within the inner ring of the rolling bearing 8, and mounted on the second rotor 14. Four active disc drive blocks 21 are evenly welded to the side of the active disc 2 and the driven disc 6 that are close to each other, and four driven disc drive blocks 61 are also evenly welded to the side of the driven disc 6 and the active disc 2 that are close to each other. The outer torsional vibration damping spring 4 is sleeved on the inner torsional vibration damping spring 5. The outer torsional vibration damping spring 4 and the inner torsional vibration damping spring 5 are disposed between the active disc 2 and the driven disc 6, and are installed within the active disc drive block 21 and the driven disc drive block 61, as shown in the schematic diagram. Figure 10 As shown.

[0041] The driving disc 2 is connected to the first rotor 1 by a key, which prevents axial movement between the driving disc 2 and the rolling bearing 8 and the first rotor 1. An annular groove 22 is formed on the side surface of the driving disc 2 for mounting the driving disc rubber ring 3. The annular groove 22 has annular groove walls 23 on both sides to fix the driving disc rubber ring 3 and prevent axial displacement. Four driving disc drive blocks 21 are evenly welded to the side of the driving disc 2 closest to the driven disc 6. The driving disc drive blocks 21 are used to fix and drive the torsional damping outer spring 4 and the torsional damping inner spring 5. A schematic diagram of the driving disc 2 is shown below. Figure 4 and Figure 5 As shown.

[0042] The driven disc 6 and the second rotor 14 are also connected by a key, which prevents axial movement between the driven disc 6 and the rolling bearing 8 and the second rotor 14. An annular groove 62 is provided on the side surface of the driven disc 6 for mounting the driven disc rubber ring 7. The annular groove 62 has walls 63 on both sides to fix the driven disc rubber ring 7 and prevent axial displacement. Four driven disc drive blocks 61 are also evenly welded to the side of the driven disc 6 closest to the driving disc 2. These drive blocks 61 receive the power transmitted from the torsional damping outer spring 4 and the torsional damping inner spring 5, and also work with the driving disc drive blocks 21 to fix the positions of the torsional damping outer spring 4 and the torsional damping inner spring 5, preventing them from shifting position or radially moving, which would affect the transmission and damping effect. A schematic diagram of the driven disc 6 is shown below. Figure 8 and Figure 9 As shown.

[0043] The inner torsional damping spring 5 is longer than the outer torsional damping spring 4. The inner spring 5 is nested within the outer spring 4, and the interlocking springs allow for motion and force transmission. Simultaneously, the inner and outer springs 5 ​​and 4 can be connected in parallel or not interacting, allowing the torsional stiffness of the inner torsional damping structure to change with operating conditions and load variations. This increases the equivalent stiffness and provides better vibration damping and absorption. The inner and outer springs also transmit power. A schematic diagram of the inner and outer torsional damping springs 5 ​​is shown below. Figure 7 As shown.

[0044] The driving disc rubber ring 3 and the driven disc rubber ring 7 are annular, and are respectively fitted into the driving disc annular groove 22 and the driven disc annular groove 62 on the sides of the driving disc 2 and the driven disc 6. Their structures are as follows: Figure 6 As shown in the diagram, the structural schematics of the driving disc rubber ring 3 and the driven disc rubber ring 7 are as follows: Figure 11 As shown.

[0045] The annular grooves 23 and 63 on the sides of the driving disc 2 and driven disc 6 are designed to prevent axial movement of the driving disc rubber ring 3 and driven disc rubber ring 7 on their side surfaces. The annular grooves 23 and 63 are interference-fitted with the inner ring of the rolling bearing 8. The driving disc rubber ring 3 and driven disc rubber ring 7 are respectively pressed into the annular grooves 22 and 62. Because the rubber rings have a certain degree of elasticity, the connection between the driving disc 2 and driven disc 6 and the rolling bearing 8 is strengthened. Simultaneously, the rubber rings reduce noise generated during equipment operation and also have a certain vibration damping effect. The greater friction between the rubber rings and their contact parts also improves the overall stability of the vibration damper.

[0046] The outer bending damping structure includes an outer rubber ring 9, a bending damping piston rod 10, a rubber piston 11, a damping oil groove 12, and a circular bracket 13. The outer rubber ring 9, which is a thin annular ring, is fitted onto the outer ring of the rolling bearing 8. The bottom of the bending damping piston rod 10 has a bending damping piston rod groove 101. The outer ring of the rolling bearing 8 is installed in the bending damping piston rod groove 101, and the outer rubber ring 9 is installed between the rolling bearing 8 and the bending damping piston rod groove 101. The elasticity of the outer rubber ring 9 reduces the vibration impact of the rolling bearing 8 on the bending damping piston rod 10, thus increasing the bending damping effect while reducing noise. The rubber piston 11 is fitted onto the bending damping piston rod head 102, with the head 102 extending into the damping oil groove 12. When the rotor system experiences bending vibration, the inner torsional damping structure transmits the vibration to the rolling bearing 8, which in turn transmits the vibration to the bending damping piston rod 10. The bending damping piston rod head 102 moves within the damping oil groove 12, and the damping oil 123 provides a certain damping to prevent the bending damping piston rod 10 from moving, thereby achieving the effect of vibration reduction.

[0047] Each bending vibration damping piston rod 10 has a bending vibration damping piston rod groove 101 at its bottom. The outer ring of the rolling bearing 8 is set in the bending vibration damping piston rod groove 101, which prevents axial displacement between the rolling bearing 8 and the bending vibration damping piston rod 10. Each bending vibration damping piston rod head 102 is fitted with a rubber piston 11. The rubber piston 11 is fitted onto the bending vibration damping piston rod head 102 and extends into the damping oil groove 12. The rubber piston 11 increases the damping between the bending vibration damping piston rod head 102 and the inner wall of the damping oil groove 12, thereby enhancing the vibration damping effect. At the same time, it prevents the damping oil 123 from leaking out of the damping oil groove 12, thus sealing the damping oil 123. There are eight bending vibration damping piston rods 10 in total. Each bending vibration damping piston rod 10 is spaced apart and independent of each other. It can receive bending vibrations transmitted to the rolling bearing in all directions during the operation of the rotor system, thereby achieving the vibration damping effect. A schematic diagram of the bending vibration damping piston rod 10 is shown below. Figure 13 As shown.

[0048] Each damping oil tank 12 is independent of the others. The damping oil tank 12 stores damping oil 123, which is a new type of damping, buffering, and stable liquid. There are eight damping oil tanks 12 in total, evenly arranged within the inner ring of the circular support 13. Figure 14As shown in the diagram. Each damping oil groove 12 is equipped with an oil supply hole 121 and an oil outlet hole 122. The oil supply hole 121 allows damping oil 123 to be added into the damping oil groove 12, and the damping oil 123 is discharged from the oil outlet hole 122 when it needs to be replaced or drained. When there is vibration, the bending damping piston rod head 102, which is fitted with a rubber piston 11, moves in the damping oil groove 12. Due to the damping effect of the damping oil 123, the movement of the bending damping piston rod 10 is prevented, thereby achieving the vibration reduction effect. A schematic diagram of the structure of the damping oil groove 12 combined with the bending damping piston rod head 102 and the rubber piston 11 is shown in the diagram. Figure 12 As shown.

[0049] The circular bracket 13 has eight damping oil grooves 12 evenly arranged on its inner ring. The circular bracket 13 serves to fix and support the entire structure. The circular bracket 13 is fixed to the rotor system platform by a fixing bracket 131. The structural diagram of the circular bracket 13 is shown below. Figure 14 As shown.

[0050] In this embodiment, a rotor system bending-torsional composite vibration damper operates as follows:

[0051] The first rotor 1 transmits power to the driving disc 2. The driving disc drive block 21 compresses the outer torsional damping spring 4 and the inner torsional damping spring 5. The outer torsional damping spring 4 and the inner torsional damping spring 5 suppress torsional vibration and transmit power to the driven disc drive block 61. The driven disc drive block 61 drives the driven disc 6 to transmit power to the second rotor 14, thereby achieving vibration reduction of torsional vibration of the rotor system.

[0052] When there is bending vibration between the rotor system of the first rotor 1 and the second rotor 14, the bending vibration is transmitted to the rolling bearing 8 through the inner torsional damping structure. The rolling bearing 8 transmits the vibration to the bending damping piston rod 10. The bending damping piston rod head 102, which is fitted with a rubber piston 11, has displacement in the damping oil groove 12. Due to the resistance, the damping oil 123 in the damping oil groove 12 prevents the bending damping piston rod head 102 from moving, thereby achieving the effect of vibration reduction.

[0053] This invention has a simple structure, improves the stability and durability of the rotor system, and provides a convenient and pollution-free method for vibration reduction of the rotor system.

[0054] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A rotor system bending-torsional composite vibration damper, characterized in that... The system includes a first rotor (1), a rolling bearing (8), a circular support (13), a second rotor (14), an outer bending damping structure disposed within the circular support (13), and an inner torsional damping structure disposed above the first rotor (1) and the second rotor (14). The inner torsional damping structure includes: a driving disc (2), a driving disc rubber ring (3), a torsional damping outer spring (4), a torsional damping inner spring (5), a driven disc (6), and a driven disc rubber ring (7). The outer bending damping structure includes: an outer rubber ring (9), a bending damping piston rod (10), a rubber piston (11), and a damping oil groove (12). The first rotor (1) is connected to the driving disk (2) by a key, and the second rotor (14) is also connected to the driven disk (6) by a key. The driving disk (2) has an annular groove (22) on its side surface that contacts the inner ring of the rolling bearing (8), and the driving disk rubber ring (3) is fitted in the annular groove (22). The driven disk (6) is located after the driving disk (2), and the driven disk (6) has an annular groove (62) on its side surface that contacts the inner ring of the rolling bearing (8), and the driven disk rubber ring (7) is fitted in the annular groove (62). The driving disc (2) and driven disc (6) are disposed in the inner ring of the rolling bearing (8). Four driving disc drive blocks (21) are uniformly welded on the side of the driving disc (2) near the driven disc (6), and four driven disc drive blocks (61) are uniformly welded on the side of the driven disc (6) near the driving disc (2). The torsional damping outer spring (4) is shorter than the torsional damping inner spring (5), and the torsional damping inner spring (5) is fitted inside the torsional damping outer spring (4). The torsional damping outer spring (4) and the torsional damping inner spring (5) are disposed between the driving disc drive block (21) and the driven disc drive block (61). The bottom of the bending vibration damping piston rod (10) is a groove structure, and the outer ring of the rolling bearing (8) is set in the groove (101). The outer rubber ring (9) is fitted on the outer ring of the rolling bearing (8) and its position is between the rolling bearing (8) and the groove (101). The bending vibration damping piston rod (10) is set on the outer rubber ring (9). The rubber piston (11) is fitted on the bending vibration damping piston rod head (102). The bending vibration damping piston rod head (102) extends into the damping oil groove (12). The damping oil groove (12) is evenly arranged on the inner ring of the circular bracket (13).

2. The rotor system bending-torsional composite vibration damper according to claim 1, characterized in that... The inner torsional damping spring (5) and the outer torsional damping spring (4) are arc-shaped springs.

3. A rotor system bending-torsional composite vibration damper according to claim 1, characterized in that... The active disk (2) has an annular groove (22) on its side surface, and the annular groove (22) is formed by walls (23) on both sides. The annular groove (22) is used to place the active disk rubber ring (3). The driven disk (6) has an annular groove (62) on its side surface, and the annular groove (62) is formed by walls (63) on both sides. The annular groove (62) is used to place the driven disk rubber ring (7). The active disk (2) and the driven disk (6) are interference-fitted with the rolling bearing (8).

4. A rotor system bending-torsional composite vibration damper according to claim 1, characterized in that... Each of the bending vibration damping piston rods (10) has a bending vibration damping piston rod groove (101) at the bottom, and each of the bending vibration damping piston rod heads (102) is fitted with a rubber piston (11). Each of the bending vibration damping piston rods (10) is spaced apart and independent of each other.

5. A rotor system bending-torsional composite vibration damper according to claim 1, characterized in that... Each of the damping oil grooves (12) is independent of each other. There are eight damping oil grooves (12) in total, which are evenly arranged in the inner circle of the circular bracket (13). Each damping oil groove (12) is provided with an oil supply hole (121) and an oil outlet hole (122).

6. A rotor system bending-torsional composite vibration damper according to claim 1, characterized in that... The damping oil groove (12) is used to store damping oil (123); each of the bending damping piston rod heads (102) is fitted with a rubber piston (11) that extends into the damping oil groove (12) and can slide along the inner wall of the damping oil groove (12).

7. A rotor system bending-torsional composite vibration damper according to claim 1, characterized in that... The circular bracket (13) has eight damping oil grooves (12) evenly arranged in the inner ring, and the circular bracket (13) is fixed on the rotor system platform by a fixing frame (131).

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