A bending-torsion composite vibration damper

Abstract

The present invention discloses a bending-torsion composite vibration damper, which includes an outer vibration damping body and an inner vibration damping body. The outer vibration damping body includes an outer bracket, a bearing support ring, a rolling bearing, an outer vibration damping spring, a spring guide column, a bearing outer ring limit plate and a bearing inner ring limit plate. The rolling bearing is sleeved on the inner vibration damping body. The outer vibration damping body relies on the outer vibration damping spring to suppress the lateral and vertical bending vibrations of the rotor structure. The inner vibration damping body includes a first mass flywheel, a force transmission plate, a sealing disk, a second mass flywheel and an inner vibration damping spring. One side of the first mass flywheel is connected to the first connecting shaft in the rotor system, and one side of the second mass flywheel is connected to the second connecting shaft in the rotor system. The inner vibration damping body transmits power and rotational motion through the inner vibration damping spring in the middle, and at the same time enables the rotor structure to have a vibration damping effect in the torsional direction. Based on the existing bending or torsional one-way vibration damper technology, the present invention addresses the common multi-directional and multi-type vibration problems of power transmission rotor systems under multiple vibration-inducing factors. It discloses a bending-torsion composite vibration damper structure, which has good vibration suppression effects in the lateral bending, vertical bending and torsional directions of the rotor system, can effectively reduce the vibration and noise generated during the operation of the rotating machinery, and improve the system reliability and service life.

Description

Technical Field

[0001] The present invention relates to the field of vibration control of a rotating machinery rotor system, and in particular to a bending-torsion composite vibration damper capable of suppressing multi-directional and multi-type coupled vibrations. Background Art

[0002] Power transmission rotor systems are key components widely used in rotating machinery. Vibration in rotor systems is a key factor affecting the safe and reliable operation of rotating machinery. Alleviating various forms of vibration in rotor systems is crucial for extending rotor life, ensuring safe and stable operation of machinery, and improving efficiency. Furthermore, different vibration-inducing factors can lead to single bending or torsional vibrations in the rotor system, with varying induction mechanisms and manifestations, and can also result in multiple types of vibration coupling in the rotor system.

[0003] In recent years, with the rapid development of my country's economy and the continuous improvement of its industrial level, modern industry is moving towards greater power output, higher operating speeds, more complex operating environments, and lighter and more sophisticated mechanization. Complex rotor systems may simultaneously experience multiple vibration-causing factors, which in turn leads to more complex vibration problems in the rotor system. At the same time, issues affecting its operational stability, safety, and reliability are becoming increasingly prominent. Currently, some existing vibration damper designs for rotor system vibration suppression structures often only address unilateral bending or torsional vibrations in the rotor system, and few can effectively suppress multi-directional and multi-type coupled vibrations simultaneously.

[0004] In view of the above problems, the current research and development technology of vibration suppression structure in the rotor system urgently needs a new type of vibration absorber to overcome the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to propose a bending-torsion composite vibration damper to solve the current technical barriers, so that it can simultaneously play a good vibration suppression effect on multi-directional and multi-type coupled vibrations of the rotor system.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention discloses a bending-torsion composite vibration damper, including an outer vibration damping body and an inner vibration damping body, the outer vibration damping body including an outer bracket, a bearing support ring, a rolling bearing, an outer vibration damping spring, a spring guide column, a bearing outer ring limit plate and a bearing inner ring limit plate, the bearing support ring is sleeved on the rolling bearing, the rolling bearing is sleeved on the inner vibration damping body, one end of the outer vibration damping spring is connected to the bearing support ring, the other end of the outer vibration damping spring is fitted with the outer bracket, and the outer vibration damping The vibration spring is mounted on a spring guide post. One end of the spring guide post extends into a circular hole on the raised cylindrical portion of the bearing support ring. The other end of the spring guide post is connected to the outer support. One end of the bearing outer ring stop plate is fixed to the bearing support ring and the other end is attached to the bearing outer ring. One end of the bearing inner ring stop plate is fixed to the first mass flywheel and the other end is attached to the bearing inner ring. One end of the bearing inner ring stop plate is fixed to the outer surfaces of the first and second mass flywheels, respectively, and the other end is attached to the end surfaces of the bearing inner ring. The inner layer vibration damping body includes a first mass flywheel, a second mass flywheel, a force transmission plate, a sealing disk, and an inner layer vibration damping spring. One side of the first mass flywheel is connected to the first connecting shaft, and the other side of the first mass flywheel is welded to the sealing disk. One end of the second mass flywheel is connected to the second connecting shaft, and the other end of the second mass flywheel is connected to the force transmission plate, which is disposed between the first mass flywheel and the sealing disk. The inner layer vibration damping spring is evenly distributed along the periphery of the force transmission plate, and the inner layer vibration damping spring is placed in the arc groove of the first mass flywheel. The two end faces of the inner layer vibration damping spring are in contact with the edge lug of the force transmission plate and the side face of the boss on the first mass flywheel at the same time.

[0007] Furthermore, the bearing support ring in the outer layer vibration damping structure is sleeved on the outer ring of the rolling bearing, the outer surface of the bearing support ring has a raised cylinder, a circular hole is provided in the raised cylinder and is used to compress the outer layer vibration damping spring, and a threaded hole is provided on the side of the bearing support ring.

[0008] Furthermore, one side of the bearing outer ring limit plate is fixed on the bearing support ring, and the other side is attached to the outer ring of the rolling bearing. One side of the bearing inner ring limit plate is respectively fixed on the outer surfaces of the first mass flywheel and the second mass flywheel, and the other side is attached to the inner ring of the rolling bearing.

[0009] Furthermore, the outer layer vibration damping spring is a straight spring, the outer layer vibration damping spring is sleeved on the spring guide column, the spring guide column is used to limit the radial movement of the spring, one end of the outer layer vibration damping spring is affixed to the raised cylinder of the bearing support ring, the inner diameter of the outer layer vibration damping spring is smaller than the outer diameter of the raised cylinder, and the other end of the outer layer vibration damping spring is affixed to the outer layer bracket.

[0010] Furthermore, four outer layer damping springs and four spring guide pillars are provided, and one end of the spring guide pillar is connected to the outer layer bracket.

[0011] Furthermore, the rolling bearing is sleeved on the inner layer vibration damping body, the outer ring of the rolling bearing is limited in axial movement by the bearing outer ring limit plate and the bearing inner ring limit plate, and the rolling bearing is used to connect the inner layer vibration damping body and the bearing support ring.

[0012] Furthermore, an arc-shaped groove is provided in the inner cavity of the first mass flywheel toward the second mass flywheel, and the inner layer vibration-damping spring is an arc-shaped spring. The inner layer vibration-damping spring is installed in the arc-shaped groove of the first mass flywheel, and both ends of the inner layer vibration-damping spring are attached to the side of the boss of the first mass flywheel. When the first mass flywheel rotates, the side of the boss of the first mass flywheel compresses the inner layer vibration-damping spring, and the groove wall of the arc-shaped groove can limit the radial movement of the inner layer vibration-damping spring.

[0013] Furthermore, the edge of the force transmission plate is provided with lugs, the number of the lugs is equal to the number of the inner layer vibration damping springs, the lugs are symmetrically distributed on the force transmission plate, the side surfaces of the lugs are in contact with the inner layer vibration damping springs, and the force transmission plate is fixed to the second mass flywheel by screws.

[0014] Furthermore, the sealing disk is fixed on the side of the first mass flywheel facing the second mass flywheel by welding, the inner layer vibration damping spring and the force transmission plate are between the first mass flywheel and the sealing disk, and the sealing disk is used to limit the axial movement of the inner layer vibration damping spring.

[0015] Furthermore, the number of the inner layer vibration-damping springs is four.

[0016] The implementation of the present invention has the following benefits: (1) an outer layer vibration damping spring-bearing vibration damping structure is designed as the outer layer vibration damping body, and the outer layer vibration damping spring is connected to the outer layer bracket to suppress the lateral and vertical bending vibration of the rotor system; (2) by utilizing the role of the first mass flywheel, the inner layer vibration damping spring and the second mass flywheel in suppressing torsional vibration, an inner layer vibration damping body is designed to transmit torque and is respectively connected to the two shafts in the rotor system. The inner layer vibration damping spring arranged in the circumferential direction transmits power to alleviate the torsional vibration caused by torque fluctuations, and through the regulating effect of the inner layer vibration damping spring, the noise and vibration generated during the operation of the rotating machinery can be effectively reduced, thereby improving the service life of the rotating machinery. In addition, the torsional vibration of the rotor system can be better suppressed by reasonably distributing the moment of inertia of the first mass flywheel and the second mass flywheel; (3) the outer layer vibration damping structure and the inner layer vibration damping structure are integrated to form a bending-torsion composite vibration damper that can suppress various types of vibrations in multiple directions. When the rotor system is matched with this vibration damper, compared with the existing one-way torsional vibration damper and one-way bending vibration damper, due to the presence of inner and outer vibration damping springs, it can achieve the function of suppressing multi-directional and multi-type coupled vibrations at the same time. On the one hand, the vibration damper can transmit power and motion and reduce torsional vibration. On the other hand, it can suppress multi-directional bending vibration, which can better reduce the possibility of rotating machinery failure caused by vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a bending-torsion composite vibration damper of the present invention.

[0018] Figure 2 This is an exploded view of the overall structure of a bending-torsion composite vibration damper of the present invention.

[0019] Figure 3 It is a cross-sectional view of the inner layer vibration-damping body of a bending-torsion composite vibration damper of the present invention.

[0020] Figure 4 This is a schematic diagram of the assembly position relationship of the inner layer vibration damping body of a bending-torsion composite vibration damper of the present invention.

[0021] Figure 5 This is a schematic diagram of the outer layer vibration reduction main body structure of a bending-torsion composite vibration damper of the present invention.

[0022] Figure 6 It is a schematic structural diagram of a limiting plate for the outer ring of a bending-torsion composite vibration damper bearing according to the present invention.

[0023] Figure 7 It is a structural schematic diagram of the inner ring limit plate of a bending-torsion composite vibration damper bearing of the present invention.

[0024] In the figure: 1-outer bracket; 2-bearing support ring; 3-rolling bearing; 4-outer vibration-damping spring; 5-spring guide column; 6-first mass flywheel; 7-second mass flywheel; 8-force transmission plate; 9-sealing disk; 10-inner vibration-damping spring; 11-bearing outer ring limit plate; 12-bearing inner ring limit plate; 13-first connecting shaft; 14-second connecting shaft. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more obvious and easy to understand, the specific implementation of the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In describing the present invention, it should be understood that the terms "first," "second," and the like are used to distinguish similar objects and are not intended to describe a particular order or precedence. Such similar terms are interchangeable where appropriate. For ease of presentation, the embodiments of the present invention may be implemented in an order other than that illustrated or described herein.

[0027] In the description of the present invention, unless otherwise specified or limited, the terms "connected" and "connection" are to be understood broadly. For example, they may refer to fixed connection, detachable connection, or welding; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the terms in the present invention based on specific circumstances.

[0028] In the description of the present invention, the number of the inner layer vibration damping springs 10 is four, which are symmetrically distributed on the outer periphery of the force transmission plate 8. It should be understood that the number of the inner layer vibration damping springs 10 is not limited to the above four, but can be two or six, etc., and can also be nested inside and outside to achieve multi-stiffness grading corresponding to the operation of the rotor system under different working conditions. The same function as mentioned above can be achieved by simply setting the structure reasonably.

[0029] like Figure 1-5As shown, an embodiment of the present invention provides a bending-torsion composite vibration damper, including an outer layer bracket 1, a bearing support ring 2, a rolling bearing 3, an outer layer vibration-damping spring 4, a spring guide column 5, a first mass flywheel 6, a second mass flywheel 7, a force transmission plate 8, a sealing disk 9, an inner layer vibration-damping spring 10, a bearing outer ring limit plate 11, a bearing inner ring limit plate 12, a first connecting shaft 13 and a second connecting shaft 14. The outer damping spring 4 is positioned by a spring guide 5 and then screwed between the outer bracket 1 and the bearing support ring 2. The bearing support ring 2 is mounted between the outer bracket 1 and the rolling bearing 3. The rolling bearing 3 is restrained from axial movement by a bearing outer ring stopper 11 and a bearing inner ring stopper 12 connected to the outer surfaces of the first and second mass flywheels 6 and 7. A sealing disk 9 is welded to the side of the first mass flywheel 6 facing the second mass flywheel 7. The inner damping spring 10 is installed in the arcuate groove formed between the sealing disk 9 and the first mass flywheel 6. A force transfer plate 8 is mounted between the first mass flywheel 6 and the sealing disk 9. The second mass flywheel 7 is fixedly connected to the force transfer plate 8. When the first mass flywheel 1 rotates, the inner damping spring 10 drives the force transfer plate 8, thereby driving the second mass flywheel 7. The first mass flywheel 6 is screwed to the first connecting shaft 13 of the rotor system, while the second mass flywheel 7 is screwed to the second connecting shaft 14 of the rotor system.

[0030] In one embodiment, if Figure 2 As shown, an outer damping spring-bearing structure is designed as the outer damping body, and outer damping spring 4 is connected to outer support 1 to suppress lateral and vertical bending vibrations. When the transmission rotor experiences radial vibration, outer damping spring 4 is radially positioned by spring guide post 5, which is screwed between outer support 1 and bearing support ring 2. The raised cylindrical projection on bearing support ring 2 compresses outer damping spring 4, achieving lateral and vertical buffering and vibration reduction.

[0031] In one embodiment, if Figure 3 As shown, the inner layer vibration damping body is designed by utilizing the role of the first mass flywheel, the inner layer vibration damping spring and the second mass flywheel in suppressing torsional vibration, and is respectively connected to the two shafts in the rotor system. When the power of the first connecting shaft 13 in the rotating machinery is transmitted to the first mass flywheel 6, the first mass flywheel 6 drives the inner layer vibration damping spring 10 in the arc groove to rotate, and the arc spring 10 is compressed by the boss on the first mass flywheel 6. The other end of the inner layer vibration damping spring 10 pushes the lug on the periphery of the force transmission plate 8, thereby driving the rotation of the second mass flywheel 7.

[0032] In one embodiment, a sealing disk 9 is welded to the side of the first-mass flywheel 6 facing the second-mass flywheel 7. An inner damping spring 10 is installed in an arcuate groove between the sealing disk 9 and the first-mass flywheel 6. A force transfer plate 8 is installed between the first-mass flywheel 6 and the sealing disk 9 to limit axial movement of the inner damping spring 10 and the force transfer plate 8. The circumferential arrangement of the inner damping springs 10 transmits power and motion, alleviating torsional vibrations caused by torque fluctuations. The regulating action of the inner damping springs 10 also enables the second-mass flywheel 7 to transfer power to the second connecting shaft 14 at a relatively stable speed.

[0033] The above descriptions are only some preferred embodiments of the present invention and are not intended to limit the present invention. For ordinary technicians in this technical field, any modifications, equivalent substitutions and improvements made within the design guidelines of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bending-torsion composite vibration damper, characterized in that: The bending-torsion composite vibration damper comprises an outer vibration damping body and an inner vibration damping body, the outer vibration damping body is connected to a fixed support, and both sides of the inner vibration damping body are respectively connected to the rotating shaft in the rotor system; the outer vibration damping body comprises an outer bracket, a bearing support ring, a rolling bearing, an outer vibration damping spring, a spring guide column, a bearing outer ring limit plate and a bearing inner ring limit plate, the bearing support ring is sleeved on the rolling bearing, the rolling bearing is sleeved on the inner vibration damping body, one end of the outer vibration damping spring is fitted with the bearing support ring, the other end of the outer vibration damping spring is fitted with the outer bracket, the outer vibration damping spring is sleeved on the spring guide column, one end of the spring guide column is connected to the bearing support ring, the other end of the spring guide column is connected to the outer bracket, and the bearing outer ring limit plate is fixed on the bearing support On the support ring, the bearing inner ring limit plate is respectively fixed on the outer surfaces of the first mass flywheel and the second mass flywheel; the inner layer vibration damping body includes a first mass flywheel, a second mass flywheel, a force transmission plate, a sealing disk and an inner layer vibration damping spring, one side of the first mass flywheel is connected to the first connecting shaft, and the other side of the first mass flywheel is welded to the sealing disk; one end of the second mass flywheel is connected to the second connecting shaft, and the other end of the second mass flywheel is connected to the force transmission plate, and the force transmission plate is arranged between the first mass flywheel and the sealing disk; an arc groove is provided in the first mass flywheel, and the inner layer vibration damping spring is placed in the arc groove of the first mass flywheel, and the two end faces of the inner layer vibration damping spring are in contact with the force transmission plate and the side of the boss on the first mass flywheel at the same time.

2. The bending-torsion composite vibration damper according to claim 1, characterized in that: The bearing support ring is sleeved on the outer ring of the rolling bearing. The circumferential surface of the bearing support ring has a raised cylinder. A circular hole is provided in the raised cylinder and is used to compress the outer layer vibration damping spring. The side of the bearing support ring is provided with a threaded hole connected to the bearing outer ring limit plate.

3. The bending-torsion composite vibration damper according to claim 1, characterized in that: One side of the bearing outer ring limit plate is fixed on the bearing support ring, and the other side is attached to the outer ring of the rolling bearing. One side of the bearing inner ring limit plate is fixed on the first mass flywheel, and the other side is attached to the inner ring of the rolling bearing.

4. The bending-torsion composite vibration damper according to claim 1, characterized in that: The outer layer vibration damping spring is a straight spring, and the outer layer vibration damping spring is sleeved on the spring guide column. The spring guide column is used to limit the radial movement of the spring. One end of the outer layer vibration damping spring is attached to the raised cylinder of the bearing support ring. The inner diameter of the outer layer vibration damping spring is smaller than the outer diameter of the raised cylinder. The other end of the outer layer vibration damping spring is attached to the outer layer bracket.

5. The bending-torsion composite vibration damper according to claim 1 or 4, characterized in that: Four outer layer damping springs and four spring guide pillars are provided. One end of the spring guide pillar is connected to the outer layer bracket, and the other end of the spring guide pillar extends into the circular hole on the raised cylinder of the bearing support ring.

6. The bending-torsion composite vibration absorber according to claim 1, characterized in that: The rolling bearing is sleeved on the inner vibration damping body, and the axial movement of the rolling bearing is limited by the bearing outer ring limit plate and the bearing inner ring limit plate. The rolling bearing is used to connect the inner vibration damping body and the bearing support ring.

7. The bending-torsion composite vibration damper according to claim 1, characterized in that: An arc-shaped groove is provided in the inner cavity of the first mass flywheel toward the second mass flywheel. The inner layer vibration-damping spring is an arc-shaped spring. The inner layer vibration-damping spring is installed in the arc-shaped groove of the first mass flywheel. Both ends of the inner layer vibration-damping spring are attached to the side surfaces of the boss of the first mass flywheel. When the first mass flywheel rotates, the side surfaces of the boss of the first mass flywheel compress the inner layer vibration-damping spring, and the groove wall of the arc-shaped groove can limit the radial movement of the inner layer vibration-damping spring.

8. The bending-torsion composite vibration absorber according to claim 1, characterized in that: The edge of the force transmission plate is provided with lugs, the number of the lugs is equal to the number of the inner layer vibration damping springs, the lugs are symmetrically distributed on the force transmission plate, the side surfaces of the lugs are in contact with the end faces of the inner layer vibration damping springs, and the force transmission plate is fixed to the second mass flywheel by screws.

9. The bending-torsion composite vibration absorber according to claim 1, characterized in that: The sealing disk is fixed to the side of the first mass flywheel facing the second mass flywheel by welding, the inner layer vibration damping spring and the force transmission plate are arranged between the first mass flywheel and the sealing disk, and the sealing disk is used to limit the axial movement of the inner layer vibration damping spring.

10. The bending-torsion composite vibration absorber according to claim 1, characterized in that: The number of the inner layer vibration damping springs is four.

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