Rotor system bending-torsion composite shock absorber structure and shock absorption method thereof

Abstract

The invention provides a bending-torsion composite shock absorber structure of a rotor system and a shock absorption method of the bending-torsion composite shock absorber structure, and relates to the technical field of bending-torsion composite shock absorption. According to the bending and twisting composite shock absorber structure of the rotor system and the shock absorption method of the bending and twisting composite shock absorber structure, the bending and twisting composite shock absorber structure of the rotor system comprises a mounting outer disc, a plurality of damping shock absorbers and an outer support, the damping shock absorbers are mounted in the mounting outer disc and distributed in a circumferential array mode, and the outer support is mounted on the inner sides of the damping shock absorbers; the driving disc assembly comprises a driving disc body, a plurality of key grooves used for being connected with a driving shaft of the rotor system are formed in the outer surface of the driving disc body, a friction plate is fixedly connected to the center of the front side wall of the driving disc body, and a connecting circular ring is fixedly connected to the position, located on the outer side of the friction plate, of the front side wall of the driving disc body. The distance between the two movable limiting blocks is adjusted, so that the relative rotation angle of the driving disc and the driven disc is changed, and then different working conditions and load changes are adapted.

Description

Technical Field

[0001] The invention relates to the technical field of bending-torsion composite vibration reduction, and in particular to a rotor system bending-torsion composite vibration reducer structure and a vibration reduction method thereof. Background Art

[0002] During the operation of the rotor system, vibration has always been a key factor affecting its performance, stability and reliability. With the continuous development of industrial technology, the application of rotor systems in many fields such as aircraft engines, power generators, industrial compressors, etc. is becoming more and more extensive, and the requirements for their operation accuracy and stability are becoming higher and higher. The bending-torsion composite vibration damper of the rotor system is mainly to deal with the bending vibration and torsional vibration during the operation of the rotor system, thereby realizing the vibration reduction function and improving the stability and reliability of the rotor system.

[0003] Among them, the bending-torsion compound shock absorber mainly relies on elastic elements such as springs on the overlapping window of the active plate and the driven plate to store elastic potential energy. When torsional vibration occurs, the active plate and the driven plate rotate relative to each other, causing the spring and other elastic elements to deform and store elastic potential energy. According to Hooke's law, the torque applied to the spring is proportional to the torsion angle. The spring stores elastic potential energy during the deformation process, thereby buffering the impact caused by torsional vibration and protecting components from damage. At the same time, it also improves the smoothness of transmission and reduces the sense of frustration during transmission. However, in order to improve the stability of power transmission and prevent excessive rotation angles from aggravating energy loss during power transmission and causing power waste, the relative rotation angle between the active plate and the driven plate is generally set to be smaller, which is also As a result, when the rotor system is subjected to high-frequency torsional vibration in a short period of time, due to the limitation of the relative rotation angle, the movement buffer space between the active disk and the driven disk is extremely limited. The limit mechanism will be under tremendous pressure in this case. The acceleration generated by the high-frequency torsional vibration will cause the limit mechanism to be subjected to a large impact force. Due to the small relative rotation angle, these impact forces cannot be dispersed and buffered through a large relative movement, causing the local stress of the limit mechanism to concentrate rapidly. As the high-frequency torsional vibration continues, the material of the limit mechanism will gradually undergo plastic deformation due to repeated stress exceeding its fatigue limit. The originally tightly fitted connection parts will have gaps or misalignments due to the deformation of the limit mechanism, which greatly reduces the connection stability between the active disk and the driven disk.

[0004] Based on the above viewpoints, the present invention provides a rotor system bending-torsion composite vibration damper structure and a vibration reduction method thereof. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a rotor system bending-torsion composite damper structure and a vibration reduction method thereof, which changes the relative rotation angle between the active disk and the driven disk by adjusting the distance between the two movable limit blocks, thereby adapting to different working conditions and load changes.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rotor system bending-torsion composite damper structure and a damping method thereof, comprising an outer plate, a plurality of damping dampers installed inside the outer plate and distributed in a circumferential array, and an outer bracket installed inside the plurality of damping dampers, an active plate assembly being rotatably connected to the inner side wall of the outer bracket, the active plate assembly comprising an active plate body, a plurality of key slots for connecting with a rotor system drive shaft being installed on the outer surface of the active plate body, a friction plate being fixedly connected to the center position of the front side wall of the active plate body, a connecting ring being fixedly connected to the front side wall of the active plate body and located outside the friction plate, and a plurality of sliding blocks being fixedly connected to the front side of the connecting ring;

[0007] A driven disc assembly is rotatably connected to the front side wall of the active disc body, the driven disc assembly comprises a driven disc body, a spline hub for connecting the transmission shaft of the rotor system is arranged at the center of the driven disc body, a plurality of connecting ring limit frames distributed in a circumferential array are fixedly connected to the rear side wall of the driven disc body, the connecting ring is rotatably connected in the connecting ring limit frame, a plurality of movable limiting slots are provided on the outer wall of the driven disc body, and both ends of each movable limiting slot are limitedly slidably connected with movable limiting blocks, and the sliding block is arranged between two movable limiting blocks;

[0008] A limit block driving mechanism for driving the movable limit block to slide on the movable limit slide groove is installed on the inner side wall of the driven disk body and on the inner side of each movable limit block. A plurality of oil filling holes are opened on the front side wall of the driven disk body, and the plurality of oil filling holes are respectively connected with a plurality of limit block driving mechanisms. A liquid injection connecting frame is fixedly connected to the front side wall of the driven disk body and located on the outer sides of the plurality of oil filling holes. A liquid injection piece is rotatably connected to the outer side wall of the liquid injection connecting frame, and the bottom of the liquid injection piece is connected to a liquid injection pump through a pipeline.

[0009] Preferably, the liquid injection component includes an oil injection fixing bracket fixedly connected to the front side wall of the outer bracket, and an oil injection connecting bracket is fixedly connected to the front side wall of the oil injection fixing bracket, and the oil injection connecting bracket is rotatably connected to the outer side wall of the liquid injection connecting bracket.

[0010] Preferably, the limit block driving mechanism includes a liquid storage box, a sliding piston is slidingly connected to the liquid storage box, a spring telescopic rod is fixedly connected to the top of the sliding piston, and the other end of the spring telescopic rod is fixedly connected to the movable limit block outside the spring telescopic rod.

[0011] Preferably, a tee is fixedly connected to the bottom of the right limit block driving mechanism of every two limit block driving mechanisms located on the same axis, and a valve stem is slidably connected to the inner limit position of each tee. A plurality of deceleration reaction mechanisms distributed in a circular array are fixedly connected to the front side wall of the active disk body, and a high-frequency vibration reaction mechanism is fixedly connected to the rear side wall of the driven disk body, and each of the high-frequency vibration reaction mechanisms is located between every two limit block driving mechanisms located on the same axis.

[0012] Preferably, a slot for providing damping fluid circulation is provided between the three-way pipe and the valve stem.

[0013] Preferably, the deceleration reaction mechanism includes a piston cylinder, the bottom of which is connected to a deceleration reaction driving plug plate via a spring, damping fluid is filled between the upper side wall of the piston cylinder and the deceleration reaction driving plug plate, and the middle position of the upper side wall of the piston cylinder is connected to the bottom pipe opening of the three-way pipe via a hose.

[0014] Preferably, the high-frequency vibration reaction mechanism includes a reactor shell, a storage chamber is provided in the lower half of the reactor shell, the bottom of the storage chamber is connected to a vibration-sensitive plug plate through a spring, the vibration-sensitive plug plate is slidingly connected in a limited position in the storage chamber, a slot hole for providing damping liquid flow is provided on the vibration-sensitive plug plate, and a one-way valve for providing one-way downward flow of damping liquid is also installed on the vibration-sensitive plug plate, the top of the vibration-sensitive plug plate is fixedly connected to a liquid plug plate, a liquid pumping chamber is provided between the liquid plug plate and the upper wall of the reactor shell, and the other two pipe openings of the three-way pipe and the limit block driving mechanism on the other side are connected to the liquid pumping chamber through a hose.

[0015] Preferably, the active disk body and the driven disk body are both provided with a plurality of overlapping windows, and an anti-torsion vibration spring is installed in each of the overlapping windows of the active disk body and the driven disk body, and the driven disk body is also provided with a plurality of fixed limiting grooves distributed in a circular array, and a plurality of limiting pins distributed in a circular array and limitedly slidably connected in the fixed limiting grooves are fixedly connected to the front side wall of the active disk body.

[0016] Preferably, a vibration reduction method of a rotor system bending-torsion composite vibration damper structure,

[0017] The following steps are involved:

[0018] S1. Before the rotor system is operated, the damping liquid is injected into the oil injection connection bracket through the injection pump. After the damping liquid is injected into the oil injection connection bracket, the damping liquid enters the liquid storage box from the oil injection hole to drive the movable limit block to slide along the movable limit slide groove, thereby adjusting the distance between the two movable limit blocks;

[0019] S2. When the rotor system is running, the drive shafts connected to the active disk assemblies are actively decelerated. At this time, the speed of the piston cylinder fixed on the active disk body will be decelerated along with the drive shaft, and the damping fluid originally stored in the piston cylinder will enter the liquid storage box, thereby pushing the movable limit block on this side to slide toward the center of the movable limit slide groove;

[0020] S3. When the drive shaft is actively decelerating and the transmission end of the rotor system is subjected to high-frequency vibration, the vibration-sensing plug plate repeatedly oscillates inside the storage chamber, and the vibration-sensing plug plate drives the liquid plug plate to continuously move downward, sucking the valve stem inside the tee outward, reducing the gap between the tee and the valve stem, and reducing the volume of the channel for providing damping liquid flow;

[0021] S4. When the drive shaft is in the process of active deceleration and the transmission end of the rotor system is subjected to long-term high-frequency vibration, when the liquid plug plate moves downward, it will also suck the damping liquid in the two limit block drive mechanisms through the hose, so that the two movable limit blocks move away from each other. Therefore, when high-frequency torsional vibration occurs in the deceleration stage, the movable limit block will first approach the sliding block. As the vibration time continues, the gap formed between the three-way pipe and the valve stem decreases, and the speed of injecting damping liquid from the deceleration reaction drive plug plate gradually decreases. When the suction speed of the liquid plug plate is greater than the injection speed of the deceleration reaction drive plug plate, the movable limit block begins to move away from the sliding block;

[0022] S5. When the high-frequency torsional vibration to which the active disk assembly is subjected lasts for a long time, the vibration-sensing plug plate moves to the bottom of the storage cavity. Due to the continuation of the vibration, the movable limit block again participates in the limiting work in a short time, and the movable limit block and the fixed limit slide groove perform the limiting work alternately.

[0023] The present invention has the following technical points and beneficial effects:

[0024] 1. It can adapt to different working conditions and load changes. Before the rotor system is operated, the damping liquid is injected into the oil injection connection bracket through the injection pump. After the damping liquid is injected into the oil injection connection bracket, the damping liquid enters the liquid storage box from the oil injection hole to drive the movable limit block to slide along the movable limit slide groove, thereby adjusting the distance between the two movable limit blocks. When the buffering and vibration reduction requirements are high, the relative rotation angle between the active disc assembly and the driven disc assembly is increased by increasing the distance between the two movable limit blocks, thereby increasing the deformable amount of the anti-torsion vibration spring, thereby absorbing more vibration energy. In the scenario where the power transmission efficiency is high, the distance between the two movable limit blocks can be reduced to ensure the accuracy of power transmission.

[0025] 2. When the rotor system is running, the drive shafts connected to several active disc assemblies will actively slow down. At this time, the speed of the piston cylinder fixed on the active disc body will slow down along with the drive shaft. The damping fluid originally stored in the piston cylinder enters the fluid storage box, thereby pushing the movable limit block on this side to slide toward the center of the movable limit slide groove. The relative rotation angle between the active disc assembly and the driven disc assembly is reduced, making the power transmission during deceleration more stable, and effectively reducing the sense of frustration caused by deceleration.

[0026] 3. When the driving shaft is in the process of active speed reduction and the transmission end of the rotor system is subjected to high-frequency vibration, the vibration-sensitive plug plate oscillates repeatedly inside the storage chamber, and the vibration-sensitive plug plate drives the liquid plug plate to move downward continuously, sucking the valve stem inside the tee outward, and the gap formed between the tee and the valve stem is reduced. The volume of the channel for providing the flow of the damping fluid is reduced, and the flow resistance of the damping fluid is significantly increased, thereby improving the damping effect of the movable limit block during the sliding process, and effectively avoiding the influence of vibration during the movement process on the movement of the movable limit block.

[0027] 4. When the driving shaft is actively decelerating and the transmission end of the rotor system is subjected to long-term high-frequency vibration, when the liquid plug plate moves downward, the damping liquid in the two limit block driving mechanisms will be sucked through the hose, so that the two movable limit blocks will move away from each other. Therefore, when high-frequency torsional vibration occurs in the deceleration stage, the movable limit block will first approach the sliding block. As the vibration time continues, the gap formed between the three-way pipe and the valve stem decreases, and the speed of injecting damping liquid into the deceleration reaction drive plug plate gradually decreases. When the suction speed of the liquid plug plate is greater than the injection speed of the deceleration reaction drive plug plate, the movable limit block begins to move away from the sliding block, so that the vibration reduction device can actively adjust the relative rotation angle of the active disk assembly and the driven disk assembly when the active disk assembly is subjected to long-term high-frequency torsional vibration during deceleration, thereby improving the buffering capacity of the vibration reduction device.

[0028] 5. When the high-frequency torsional vibration to which the active disk assembly is subjected lasts for a long time, the vibration-sensing plug plate moves to the bottom of the storage chamber. Due to the continuation of the vibration, the movable limit block again participates in the limiting work in a short time. The movable limit block and the fixed limit slide groove perform the limiting work alternately, thereby reducing the deformation problem of the limiting structure caused by long-term collision, and avoiding the problem of the active disk assembly and the driven disk assembly being loosened due to long-term vibration of the vibration reduction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 It is a schematic diagram of the back of the present invention;

[0031] Figure 3 It is a schematic diagram of the present invention after the outer plate and the damping shock absorber are hidden and installed;

[0032] Figure 4 It is a schematic diagram of the cooperation between the active disk assembly and the driven disk assembly in the present invention;

[0033] Figure 5 is a schematic diagram of an active disk assembly in the present invention;

[0034] Figure 6 It is a schematic diagram of the internal structure of the driven disk assembly and the active disk assembly and the driven disk assembly in the present invention;

[0035] Figure 7 It is a schematic diagram of the limit block driving mechanism and the valve stem in the present invention;

[0036] Figure 8 It is a cross-sectional view of the deceleration reaction mechanism in the present invention;

[0037] Fig. 9 Schematic diagram of the three-way pipe in the present invention;

[0038] Fig.10 A top view of the active disk assembly and the driven disk assembly of the present invention;

[0039] Fig.11 for Fig.10 A magnified schematic diagram of center A.

[0040] Among them, 1. Install the outer plate; 2. Damping shock absorber; 3. External bracket; 4. Active plate assembly; 5. Driven plate assembly; 6. Liquid injection part; 7. Liquid injection pump; 8. Anti-torsion vibration spring; 9. High-frequency vibration reaction mechanism; 10. Limit block driving mechanism; 11. Speed ​​reduction reaction mechanism; 12. Three-way pipe; 13. Valve stem;

[0041] 41. driving disc body; 42. keyway; 43. friction plate; 44. limit pin; 45. connecting ring; 46. sliding block;

[0042] 51. driven disc body; 52. spline hub; 53. injection connection frame; 54. oil injection hole; 55. fixed limit slide; 56. movable limit slide; 57. movable limit block; 58. connection ring limit frame;

[0043] 61. Oil filling fixing bracket; 62. Oil filling connecting bracket;

[0044] 91. Reactor housing; 92. Liquid extraction chamber; 93. Vibration sensing plug plate; 94. Storage chamber; 95. Liquid plug plate;

[0045] 101, liquid storage box; 102, sliding piston; 103, spring telescopic rod;

[0046] 111. Piston cylinder; 112. Speed ​​reduction reaction drive plug plate. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Embodiment 1

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an embodiment of the present invention provides a rotor system bending-torsion composite damper structure, comprising an installed outer disk 1, a plurality of damping dampers 2 installed inside the installed outer disk 1 and distributed in a circumferential array, and an outer bracket 3 installed inside the plurality of damping dampers 2, an active disk assembly 4 is rotatably connected to the inner side wall of the outer bracket 3, the active disk assembly 4 comprises an active disk body 41, a plurality of key slots 42 for connecting with the drive shaft of the rotor system are installed on the outer surface of the active disk body 41, a friction plate 43 is fixedly connected to the center position of the front side wall of the active disk body 41, a connecting ring 45 is fixedly connected to the front side wall of the active disk body 41 and located outside the friction plate 43, a plurality of sliding blocks 46 are fixedly connected to the front side of the connecting ring 45, a plurality of overlapping windows are opened on the active disk body 41 and the driven disk body 51, and an anti-torsion vibration spring 8 is installed in each of the overlapping windows of the active disk body 41 and the driven disk body 51, and in the driven disk body The body 51 is also provided with a plurality of fixed limiting grooves 55 distributed in a circumferential array. The front side wall of the active disk body 41 is fixedly connected with a plurality of limiting pins 44 distributed in a circumferential array and limitedly slidably connected in the fixed limiting grooves 55. When the rotor system is subjected to bending vibration, the vibration is absorbed by the damping fluid in the damping shock absorber 2. When the main shaft of the rotor system drives the active disk assembly 4 to rotate clockwise, due to the rotational connection relationship between the active disk assembly 4 and the driven disk assembly 5, the active disk assembly 4 first drives the driven disk assembly 5 to rotate until the active disk assembly 4 rotates to the limited position of the driven disk assembly 5, and then drives the driven disk assembly 5 to rotate together. The anti-torsion vibration spring 8 arranged in the active disk assembly 4 and the driven disk assembly 5 can reduce the impact on the system during the relative rotation of the active disk assembly 4 and the driven disk assembly 5. A friction gasket is also arranged between the active disk assembly 4 and the driven disk assembly 5 to consume the energy generated by the vibration.

[0050] like Figure 3 , Figure 4 and Figure 5As shown, a driven disk assembly 5 is rotatably connected to the front side wall of the active disk body 41, and the driven disk assembly 5 includes a driven disk body 51. A spline hub 52 for connecting with the drive shaft of the rotor system is arranged at the center of the driven disk body 51. A plurality of connecting ring limit frames 58 distributed in a circular array are fixedly connected to the rear side wall of the driven disk body 51. The connecting ring 45 is rotatably connected in the connecting ring limit frame 58. A plurality of movable limiting grooves 56 are provided on the outer wall of the driven disk body 51, and movable limiting blocks 57 are slidably connected at both ends of each movable limiting groove 56, and the sliding block 46 is arranged between the two movable limiting blocks 57.

[0051] like Figure 4 , Figure 6 and Figure 7As shown, a limit block driving mechanism 10 for driving the movable limit block 57 to slide on the movable limit slide groove 56 is installed on the inner side wall of the driven disk body 51 and located on the inner side of each movable limit block 57, a plurality of oil injection holes 54 are opened on the front side wall of the driven disk body 51, and the plurality of oil injection holes 54 are respectively connected to the plurality of limit block driving mechanisms 10, and a liquid injection connecting frame 53 is fixedly connected to the front side wall of the driven disk body 51 and located on the outer side of the plurality of oil injection holes 54, and a liquid injection member 6 is rotatably connected to the outer side wall of the liquid injection connecting frame 53, and the liquid injection member 6 is The bottom is connected to a liquid injection pump 7 through a pipeline, and the liquid injection member 6 includes an oil injection fixed bracket 61 fixedly connected to the front side wall of the outer bracket 3, and an oil injection connecting bracket 62 is fixedly connected to the front side wall of the oil injection fixed bracket 61, and the oil injection connecting bracket 62 is rotatably connected to the outer side wall of the liquid injection connecting bracket 53. The limit block driving mechanism 10 includes a liquid storage box 101, and a sliding piston 102 is slidably connected to the liquid storage box 101. The top of the sliding piston 102 is fixedly connected to a spring telescopic rod 103, and the other end of the spring telescopic rod 103 is connected to the movable limit type on its outer side. The block 57 is fixedly connected. Before the rotor system is operated, the damping liquid is injected into the oil injection connection bracket 62 through the injection pump 7. The damping liquid can be selected as hydraulic oil, silicone oil and other liquids with vibration reduction, buffering and movement speed control. After the damping liquid is injected into the oil injection connection bracket 62, the damping liquid enters the liquid storage box 101 from the oil injection hole 54, and then the damping liquid pushes the sliding piston 102 to move, and drives the movable limit block 57 to slide along the movable limit slide groove 56 through the telescopic characteristics of the spring telescopic rod 103, thereby adjusting the distance between the two movable limit blocks 57. Changing the spacing of the movable limit blocks 57 can directly adjust the relative rotation spacing between the active disk assembly 4 and the driven disk assembly 5, so as to adapt to different working conditions and load changes. When the buffering and vibration reduction requirements are high, the relative rotation angle between the active disk assembly 4 and the driven disk assembly 5 is increased by increasing the spacing between the two movable limit blocks 57, thereby increasing the deformable amount of the anti-torsion vibration spring 8 and absorbing more vibration energy. In scenarios where high power transmission efficiency is required, the spacing between the two movable limit blocks 57 can be reduced to ensure the accuracy of power transmission.

[0052] Embodiment 2

[0053] like Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, this embodiment provides another technical solution based on the first embodiment, for every two limit block driving mechanisms 10 located on the same axis, a three-way pipe 12 is fixedly connected below the limit block driving mechanism 10 on the right side, and a valve stem 13 is connected to the internal limiting sliding of each three-way pipe 12. A plurality of deceleration reaction mechanisms 11 distributed in a circular array are fixedly connected to the front side wall of the active disk body 41, and a high-frequency vibration reaction mechanism 9 is fixedly connected to the rear side wall of the driven disk body 51. Each high-frequency vibration reaction mechanism 9 is located between every two limit block driving mechanisms 10 located on the same axis, and a slot for providing damping fluid circulation is provided in the middle position of the three-way pipe 12 and the valve stem 13.

[0054] like Figure 8 As shown, the deceleration reaction mechanism 11 includes a piston cylinder 111, the bottom of the piston cylinder 111 is connected to a deceleration reaction drive plug plate 112 through a spring, and the upper side wall of the piston cylinder 111 and the deceleration reaction drive plug plate 112 are filled with damping fluid. The middle position of the upper side wall of the piston cylinder 111 is connected to the bottom pipe opening of the three-way pipe 12 through a hose. The hose adopts a redundant design to avoid the active disk assembly 4 and the driven disk assembly 5 from interfering with each other due to the stretching of the hose when the active disk assembly 4 and the driven disk assembly 5 rotate relative to each other. When the rotor system is running, the driving shafts connected to the active disk assemblies 4 are actively decelerated. At this time, the rotation speed of the piston cylinder 111 fixed on the active disk body 41 will be decelerated along with the driving shaft, and the deceleration fluid arranged inside the piston cylinder 111 Due to inertia, the high-speed reaction driving plug plate 112 will continue to maintain its original motion state. At this time, the deceleration reaction driving plug plate 112 slides outward. At this time, the damping fluid originally stored in the piston cylinder 111 will enter the liquid storage box 101 through the hose, the three-way pipe 12 and the valve stem 13 in the three-way pipe 12, thereby pushing the movable limit block 57 on this side to slide toward the center of the movable limit slide groove 56. At this time, since the active disk assembly 4 has just decelerated, and the driven disk assembly 5 is still rotating at a high speed, the active disk assembly 4 will rotate toward the sliding movable limit block 57. At this time, the relative rotation angle between the active disk assembly 4 and the driven disk assembly 5 is reduced, so that the power transmission during the deceleration process is smoother, and the sense of frustration caused by the deceleration is effectively reduced.

[0055] like Figure 6 , Figure 7 , Fig.10 and Fig.11As shown, when the driving shaft is in the process of active deceleration and the transmission end of the rotor system is subjected to high-frequency vibration, since the high-frequency vibration reaction mechanism 9 is installed on the driven disc assembly 5, the vibration-sensitive plug plate 93 in the driven disc assembly 5 is also subjected to the high-frequency vibration, which makes the vibration-sensitive plug plate 93 repeatedly oscillate inside the storage chamber 94. The vibration-sensitive plug plate 93 is not only provided with slots for providing the flow of damping liquid, but also provided with a one-way valve, which makes the vibration-sensitive plug plate 93 descend quickly and rise slowly when subjected to vibration. The vibration-sensitive plug plate 93 drives the liquid plug plate 95 to move downward continuously, thereby sucking the valve stem 13 inside the three-way pipe 12 outward, reducing the gap formed between the three-way pipe 12 and the valve stem 13, reducing the channel volume for providing the flow of damping liquid, and significantly improving the flow resistance of the damping liquid, thereby improving the damping effect of the movable limit block 57 during the sliding process, and effectively avoiding the movement. The process vibration affects the movement of the movable limit block 57. At the same time, when the liquid plug plate 95 moves downward, the damping liquid in the two limit block driving mechanisms 10 will be sucked through the hose, so that the two movable limit blocks 57 move away from each other. Therefore, when high-frequency torsional vibration occurs in the deceleration stage, the movable limit block 57 will first approach the sliding block 46. As the vibration time continues, the gap formed between the three-way pipe 12 and the valve stem 13 decreases, and the speed of injecting damping liquid into the deceleration reaction drive plug plate 112 gradually decreases. When the suction speed of the liquid plug plate 95 is greater than the injection speed of the deceleration reaction drive plug plate 112, the movable limit block 57 begins to move away from the sliding block 46, so that the vibration reduction device can actively adjust the relative rotation angle of the active disk assembly 4 and the driven disk assembly 5 when the active disk assembly 4 is subjected to long-term high-frequency torsional vibration during the deceleration process, thereby improving the buffering capacity of the vibration reduction device.

[0056] Embodiment 3

[0057] like Fig.10 and Fig.11As shown, this embodiment provides another technical solution based on the first and second embodiments. The high-frequency vibration reaction mechanism 9 includes a reactor shell 91. The lower half of the reactor shell 91 is provided with a storage chamber 94. The bottom of the storage chamber 94 is connected to a vibration plug plate 93 through a spring. The vibration plug plate 93 is limitedly slidably connected in the storage chamber 94. The vibration plug plate 93 is provided with a slot for providing damping liquid flow. The vibration plug plate 93 is also provided with a one-way valve for providing one-way downward flow of the damping liquid. The top of the vibration plug plate 93 is fixedly connected to a liquid plug plate. 95, a liquid pumping chamber 92 is provided between the liquid plug plate 95 and the upper wall of the reactor housing 91, the other two pipe openings of the three-way pipe 12 and the limit block driving mechanism 10 on the other side are connected to the liquid pumping chamber 92 through a hose, a plurality of overlapping windows are provided on the active disk body 41 and the driven disk body 51, and an anti-torsion vibration spring 8 is installed in each of the overlapping windows of the active disk body 41 and the driven disk body 51, and a plurality of fixed limit slide grooves 55 distributed in a circumferential array are provided on the driven disk body 51, and the front side of the active disk body 41 is provided with a plurality of fixed limit slide grooves 55 distributed in a circumferential array. A plurality of limit pins 44 are fixedly connected to the wall and are distributed in a circumferential array and are limitedly slidably connected in the fixed limit slot 55. When the high-frequency torsional vibration of the active disk assembly 4 is subjected to a long time, the vibration-sensing plug plate 93 moves to the bottom of the storage chamber 94. At this time, the active disk assembly 4 and the driven disk assembly 5 are no longer limited by the movable limit block 57 and the sliding block 46, but are limited by the limit pins 44 and the fixed limit slot 55. At this time, the deformable amount of the anti-torsion vibration spring 8 reaches the maximum value, and the buffering capacity of the vibration reduction device is improved by the deformation of the anti-torsion vibration spring 8. At the same time, due to the continuous vibration, the vibration-sensing plug plate 93 will move upward for a distance after reaching the bottom of the moving storage chamber 94. At this time, part of the damping fluid will flow back into the limit block driving mechanism 10, so that the movable limit block 57 will participate in the limiting work again in a short time. The movable limit block 57 and the fixed limit slide groove 55 are used to alternately perform the limiting work, which can reduce the deformation problem of the limiting structure caused by long-term collision, and avoid the problem of the active disk assembly 4 and the driven disk assembly 5 being loosened due to long-term vibration of the vibration reduction mechanism.

[0058] A vibration reduction method for a rotor system bending-torsion composite vibration damper structure, comprising the following steps:

[0059] S1. Before the rotor system is operated, the damping liquid is injected into the oil injection connection bracket 62 through the injection pump 7. The damping liquid can be hydraulic oil, silicone oil or other liquids with vibration reduction, buffering and movement speed control. After the damping liquid is injected into the oil injection connection bracket 62, the damping liquid enters the liquid storage box 101 from the oil injection hole 54, and then the damping liquid pushes the sliding piston 102 to move, and drives the movable limit block 57 to slide along the movable limit slide groove 56 through the telescopic characteristics of the spring telescopic rod 103, thereby adjusting the distance between the two movable limit blocks 57. By changing The spacing of the movable limit blocks 57 can directly adjust the relative rotation spacing between the active disk assembly 4 and the driven disk assembly 5, so as to adapt to different working conditions and load changes. When the buffering and vibration reduction requirements are high, the relative rotation angle between the active disk assembly 4 and the driven disk assembly 5 is increased by increasing the spacing between the two movable limit blocks 57, thereby increasing the deformability of the anti-torsion vibration spring 8, thereby absorbing more vibration energy. In the scenario where the power transmission efficiency is required to be high, the distance between the two movable limit blocks 57 can be reduced to ensure the accuracy of power transmission.

[0060] S2. When the rotor system is running, the driving shafts connected to the active disk assemblies 4 are actively decelerated. At this time, the rotation speed of the piston cylinder 111 fixed on the active disk body 41 will be decelerated together with the driving shaft, and the deceleration reaction drive plug plate 112 set inside the piston cylinder 111 will continue to maintain the original motion state due to inertia. At this time, the deceleration reaction drive plug plate 112 slides outward. At this time, the damping fluid originally stored in the piston cylinder 111 will enter the liquid storage box 101 through the hose, the three-way pipe 12 and the valve stem 13 in the three-way pipe 12, thereby pushing the movable limit block 57 on this side to slide toward the center of the movable limit slot 56. At this time, since the active disk assembly 4 has just decelerated, and the driven disk assembly 5 is still rotating at a high speed, the active disk assembly 4 will rotate toward the sliding movable limit block 57. At this time, the relative rotation angle between the active disk assembly 4 and the driven disk assembly 5 is reduced, so that the power transmission during the deceleration process is more stable, and the sense of frustration caused by the deceleration is effectively reduced;

[0061] S3. When the driving shaft is in the process of active deceleration and the transmission end of the rotor system is subjected to high-frequency vibration, since the high-frequency vibration reaction mechanism 9 is installed on the driven disc assembly 5, the vibration-sensitive plug plate 93 in the driven disc assembly 5 is also subjected to the high-frequency vibration, which makes the vibration-sensitive plug plate 93 repeatedly oscillate inside the storage chamber 94. The vibration-sensitive plug plate 93 is not only provided with slots for providing the flow of damping liquid, but also provided with a one-way valve, so that when subjected to vibration, the vibration-sensitive plug plate 93 descends quickly and rises slowly, and the vibration-sensitive plug plate 93 drives the liquid plug plate 95 to move downward continuously, thereby sucking the valve stem 13 inside the three-way pipe 12 outward, and the gap formed between the three-way pipe 12 and the valve stem 13 is reduced, and the channel volume for providing the flow of damping liquid is reduced, and the flow resistance of the damping liquid is significantly improved, thereby improving the damping effect of the movable limit block 57 during the sliding process, and effectively avoiding the influence of the vibration during the movement process on the movement of the movable limit block 57;

[0062] S4. When the driving shaft is in the process of active deceleration and the transmission end of the rotor system is subjected to long-term high-frequency vibration, the damping liquid in the two limit block driving mechanisms 10 will be sucked through the hose when the liquid plug plate 95 moves downward, so that the two movable limit blocks 57 are separated from each other. Therefore, when high-frequency torsional vibration occurs in the deceleration stage, the movable limit block 57 will first approach the sliding block 46. As the vibration time continues, the gap formed between the three-way pipe 12 and the valve stem 13 is reduced, and the speed of injecting damping liquid into the deceleration reaction drive plug plate 112 gradually decreases. When the suction speed of the liquid plug plate 95 is greater than the injection speed of the deceleration reaction drive plug plate 112, the movable limit block 57 begins to move away from the sliding block 46, so that the vibration reduction device can actively adjust the relative rotation angle between the active disk assembly 4 and the driven disk assembly 5 when the active disk assembly 4 is subjected to long-term high-frequency torsional vibration during deceleration, thereby improving the buffering capacity of the vibration reduction device;

[0063] S5. When the high-frequency torsional vibration of the active disk assembly 4 is subjected to a long time, the vibration-sensing plug plate 93 moves to the bottom of the storage chamber 94. At this time, the active disk assembly 4 and the driven disk assembly 5 are no longer limited by the movable limit block 57 and the sliding block 46, but are limited by the limit pin 44 and the fixed limit slot 55. At this time, the deformable amount of the anti-torsion vibration spring 8 reaches the maximum value, and the buffering capacity of the vibration reduction device is improved by the deformation of the anti-torsion vibration spring 8. At the same time, due to the continuous vibration, the vibration-sensing plug plate 93 will move upward for a distance after reaching the bottom of the active storage chamber 94 during vibration. At this time, part of the damping fluid flows back into the limit block driving mechanism 10, so that the movable limit block 57 participates in the limiting work again in a short time. The movable limit block 57 and the fixed limit slot 55 alternately perform the limiting work, which can reduce the deformation problem of the limiting structure caused by long-term collision, and avoid the problem of the active disk assembly 4 and the driven disk assembly 5 loosening caused by long-term vibration of the vibration reduction mechanism.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotor system bending-torsion composite vibration damper structure, comprising an outer mounting plate (1), a plurality of damping vibration dampers (2) mounted inside the outer mounting plate (1) and distributed in a circumferential array, and an outer bracket (3) mounted inside the plurality of damping vibration dampers (2), characterized in that: An active disk assembly (4) is rotatably connected to the inner side wall of the outer bracket (3), the active disk assembly (4) comprising an active disk body (41), a plurality of keyways (42) for connecting with the drive shaft of the rotor system are installed on the outer surface of the active disk body (41), a friction plate (43) is fixedly connected to the center of the front side wall of the active disk body (41), a connecting ring (45) is fixedly connected to the front side wall of the active disk body (41) and located outside the friction plate (43), and a plurality of sliding blocks (46) are fixedly connected to the front side of the connecting ring (45); A driven disk assembly (5) is rotatably connected to the front side wall of the active disk body (41), and the driven disk assembly (5) comprises a driven disk body (51), a spline hub (52) for connecting with the transmission shaft of the rotor system is arranged at the center of the driven disk body (51), a plurality of connecting ring limit frames (58) distributed in a circumferential array are fixedly connected to the rear side wall of the driven disk body (51), the connecting ring (45) is rotatably connected in the connecting ring limit frame (58), a plurality of movable limit slots (56) are provided on the outer wall of the driven disk body (51), and both ends of each movable limit slot (56) are slidably connected with movable limit blocks (57), and the sliding block (46) is arranged between two movable limit blocks (57); A limit block driving mechanism (10) for driving the movable limit block (57) to slide on the movable limit slide groove (56) is installed on the inner side wall of the driven disc body (51) and located on the inner side of each movable limit block (57). A plurality of oil injection holes (54) are opened on the front side wall of the driven disc body (51). The plurality of oil injection holes (54) are respectively connected to the plurality of limit block driving mechanisms (10). A liquid injection connecting frame (53) is fixedly connected to the front side wall of the driven disc body (51) and located outside the plurality of oil injection holes (54). A liquid injection member (6) is rotatably connected to the outer side wall of the liquid injection connecting frame (53). The bottom of the liquid injection member (6) is connected to a liquid injection pump (7) through a pipeline.

2. A rotor system bending-torsion composite damper structure according to claim 1, characterized in that: The liquid injection member (6) comprises an oil injection fixed bracket (61) fixedly connected to the front side wall of the outer bracket (3); an oil injection connecting bracket (62) is fixedly connected to the front side wall of the oil injection fixed bracket (61); and the oil injection connecting bracket (62) is rotatably connected to the outer side wall of the liquid injection connecting bracket (53).

3. The rotor system bending-torsion composite damper structure according to claim 1 is characterized in that: The limit block driving mechanism (10) comprises a liquid storage box (101), a sliding piston (102) is limitedly slidably connected inside the liquid storage box (101), a spring telescopic rod (103) is fixedly connected to the top of the sliding piston (102), and the other end of the spring telescopic rod (103) is fixedly connected to a movable limit block (57) outside the spring telescopic rod (103).

4. The rotor system bending-torsion composite damper structure according to claim 1, characterized in that: Each of the two limit block driving mechanisms (10) located on the same axis has a three-way pipe (12) fixedly connected below the limit block driving mechanism (10) on the right side, and each of the three-way pipes (12) is internally limited and slidably connected to a valve stem (13). A plurality of deceleration reaction mechanisms (11) distributed in a circular array are fixedly connected to the front side wall of the active disk body (41), and a high-frequency vibration reaction mechanism (9) is fixedly connected to the rear side wall of the driven disk body (51), and each of the high-frequency vibration reaction mechanisms (9) is located between each of the two limit block driving mechanisms (10) located on the same axis.

5. The rotor system bending-torsion composite damper structure according to claim 4, characterized in that: A slot for providing damping fluid flow is provided at the middle position between the three-way pipe (12) and the valve stem (13).

6. A rotor system bending-torsion composite damper structure according to claim 5, characterized in that: The deceleration reaction mechanism (11) comprises a piston cylinder (111), the bottom of the piston cylinder (111) is connected to a deceleration reaction drive plug plate (112) via a spring, a damping fluid is filled between the upper side wall of the piston cylinder (111) and the deceleration reaction drive plug plate (112), and the middle position of the upper side wall of the piston cylinder (111) is connected to the bottom pipe opening of the three-way pipe (12) via a hose.

7. A rotor system bending-torsion composite damper structure according to claim 6, characterized in that: The high-frequency vibration reaction mechanism (9) comprises a reactor shell (91), the lower half of which is provided with a storage chamber (94), the bottom of which is connected to a vibration-sensing plug plate (93) via a spring, the vibration-sensing plug plate (93) being limitedly slidably connected in the storage chamber (94), the vibration-sensing plug plate (93) being provided with a slot for providing damping liquid flow, and the vibration-sensing plug plate (93) being further provided with a one-way valve for providing one-way downward flow of damping liquid, the top of the vibration-sensing plug plate (93) being fixedly connected with a liquid plug plate (95), a liquid pumping chamber (92) being provided between the liquid plug plate (95) and the upper wall of the reactor shell (91), and the other two pipe openings of the three-way pipe (12) and the limit block driving mechanism (10) on the other side are both connected to the liquid pumping chamber (92) via a hose.

8. The rotor system bending-torsion composite damper structure according to claim 1, characterized in that: The active disk body (41) and the driven disk body (51) are both provided with a plurality of overlapping windows, and an anti-torsion vibration spring (8) is installed in each of the overlapping windows of the active disk body (41) and the driven disk body (51). The driven disk body (51) is also provided with a plurality of fixed limiting sliding grooves (55) distributed in a circumferential array, and a plurality of limiting pins (44) distributed in a circumferential array and limitedly slidably connected in the fixed limiting sliding grooves (55) are fixedly connected to the front side wall of the active disk body (41).

9. A vibration reduction method for a rotor system bending-torsion composite vibration damper structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Before the rotor system is operated, the damping liquid is injected into the oil injection connection bracket (62) through the injection pump (7). After the damping liquid is injected into the oil injection connection bracket (62), the damping liquid enters the liquid storage box (101) from the oil injection hole (54) to drive the movable limit block (57) to slide along the movable limit slide groove (56), thereby adjusting the distance between the two movable limit blocks (57); S2. When the rotor system is running, the driving shafts connected to the active disk assemblies (4) are actively decelerated. At this time, the rotation speed of the piston cylinder (111) fixed on the active disk body (41) is decelerated along with the driving shaft, and the damping fluid originally stored in the piston cylinder (111) enters the fluid storage box (101), thereby pushing the movable limit block (57) on this side to slide toward the center of the movable limit slide groove (56); S3. When the driving shaft is actively decelerating and the transmission end of the rotor system is subjected to high-frequency vibration, the vibration-sensing plug plate (93) repeatedly oscillates inside the storage chamber (94), and the vibration-sensing plug plate (93) drives the liquid plug plate (95) to continuously move downward, thereby sucking the valve stem (13) inside the three-way pipe (12) outward, and the gap formed between the three-way pipe (12) and the valve stem (13) is reduced, thereby reducing the volume of the channel for providing the damping liquid flow; S4. When the driving shaft is in the process of active deceleration and the transmission end of the rotor system is subjected to long-term high-frequency vibration, when the liquid plug plate (95) moves downward, it will also suck the damping liquid in the two limit block driving mechanisms (10) through the hose, so that the two movable limit blocks (57) move away from each other. Therefore, when high-frequency torsional vibration occurs in the deceleration stage, the movable limit block (57) will first approach the sliding block (46). As the vibration time continues, the gap formed between the three-way pipe (12) and the valve stem (13) decreases, and the speed of injecting damping liquid into the deceleration reaction drive plug plate (112) gradually decreases. When the suction speed of the liquid plug plate (95) is greater than the injection speed of the deceleration reaction drive plug plate (112), the movable limit block (57) begins to move away from the sliding block (46); S5. When the high-frequency torsional vibration to which the active disk assembly (4) is subjected lasts for a long time, the vibration-sensing plug plate (93) moves to the bottom of the storage chamber (94). Due to the continuation of the vibration, the movable limit block (57) again participates in the limiting operation in a short time, and the movable limit block (57) and the fixed limit slot (55) perform the limiting operation alternately.

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