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CN-117145918-B - Multi-parameter adjustable track type rotary nonlinear energy sink with rigidity damping inertia

CN117145918BCN 117145918 BCN117145918 BCN 117145918BCN-117145918-B

Abstract

The invention relates to a track type rotary nonlinear energy sink with rigidity damping inertia and multiple parameter adjustment, which is used for transmitting energy of an input shaft to a NES disc through a connecting rod and dissipating the energy through a damper. The device drives the connecting rod to move on the track through the input rod, the other end of the connecting rod compresses the spring and the damper, nonlinear rigidity and nonlinear damping are generated, the ECU controls the deflection angle of the track through the gear, the nonlinear rigidity and nonlinear damping can be adjusted, the ECU controls the position of the rack on the NES disc, the rotational inertia can be adjusted, and the sensor is used for monitoring torsional vibration amplitude and angular speed in real time and feeding back the ECU to carry out parameter adjustment. The invention realizes the continuous adjustment of nonlinear rigidity and nonlinear damping by changing the angle of the rotating track, realizes the continuous adjustment of moment of inertia by changing the distance between the barycenter of the rack and the rotation center of the NES disc, has simple manufacture and assembly and low cost, widens the realization mode of nonlinear energy sink, and has good engineering application value.

Inventors

  • WANG YONG
  • LI JIACHEN
  • LIU YANG
  • SUN XIAODONG

Assignees

  • 江苏大学

Dates

Publication Date
20260512
Application Date
20231016

Claims (8)

  1. 1. The track type rotary nonlinear energy sink with the stiffness damping inertia and multiple parameter adjustable is characterized by comprising a first ECU (1), an inner gear shaft (2), a sensor (3), a second ECU (4), a bolt A (5), a bolt B (6), a sliding chute A (7), a track A (8), a bolt C (9), a connecting rod A (10), a bolt D (11), a spring A (12), a damper A (13), a sliding block A (14), a bolt E (15), a sliding chute B (16), NES discs (17), an input rod (18), a sliding chute C (19), a sliding block B (20), a bolt F (21), a spring B (22), a damper B (23), a bolt G (24), a bolt H (25), a connecting rod B (26), a track B (27), a first driven gear (28), an outer gear shaft (29), a gear A (30), a second driven gear (31), a gear B (32), an input shaft (33), a bearing (34), a gasket (35), a fixed ring (36), a sliding block C (42), a sliding block D (43), a J (44) and a rack (46); the damper A (13) and the damper B (23) are composed of an upper pin head (37), a piston rod (39), a shell (40) and a lower pin head (41), wherein the upper pin head (37) and the sliding chute B (16) are fixed by a bolt C (9), the lower pin head (41) and the sliding chute A (14) are fixed by a bolt D (11), the upper pin head (37) and the sliding chute C (19) are fixed by a bolt F (21) by the damper B (23), and the lower pin head (41) and the sliding chute B (20) are fixed by a bolt H (25); The gear A (30) rotates under the control of the second ECU (4), the gear A (30) drives the rack (46), the sliding block C (42) and the sliding block D (43) to move along the sliding groove A (7), and the distance between the center of mass of the rack (46) and the rotation center of the NES disc (17) is adjusted, so that the moment of inertia of the nonlinear energy sink is changed, the moment of inertia of the nonlinear energy sink is adjustable, and the nonlinear energy sink has good vibration reduction performance; The gear B (32) is controlled by the first ECU (1) to drive the first driven gear (28) and the second driven gear (31) to synchronously rotate around respective axes, the first driven gear (28) drives the track B (27) to rotate, and the second driven gear (31) drives the track A (8) to rotate, so that synchronous reverse rotation of the track A (8) and the track B (27) is realized, the included angle between the track A (8) and the input rod (18) is changed, the included angle between the track B (27) and the input rod (18) is changed, and further, the non-linear rigidity and the non-linear damping are changed; the input shaft (33) can rotate around the axis of the input shaft (33) and transmit the rotating speed and torque of an external system, and the axis of the input shaft (33) is parallel to the axes of the inner gear shaft (2) and the outer gear shaft (29); The input shaft (33) is connected with the input rod (18) on the axis of the input shaft (33), the input rod is fixed through a gasket (35) and a fixed ring (36), and the input shaft (33) can drive the input rod (18) to synchronously rotate around the axis of the input shaft (33); The NES disc (17) is fixed on the input shaft (33) through a gasket (35), and the NES disc (17) can rotate relatively around the axis of the input shaft (33); the sliding chute B (16) and the sliding chute C (19) are symmetrically arranged about the input rod, the sliding chute B (16) is fixed on the NES disc (17) by the bolt C (9) and the bolt E (15), and the sliding chute C (19) is fixed on the NES disc (17) by the bolt F (21) and the bolt G (24); The sliding block A (14) is connected with the spring A (12) and the damper A (13) through the bolt D (11) and can slide in the chute B (16), and the sliding block B (20) is connected with the spring B (22) and the damper B (23) through the bolt H (25) and can slide in the chute C (19); One end of the spring A (12) and one end of the damper A (13) are fixed with the chute B (16) through the bolt C (9), and the other end of the spring A (22) and one end of the damper B (23) are fixed with the chute C (19) through the bolt F (21), and the other end of the spring B and the damper B are fixed with the slider B (20) through the bolt H (25); One end of the connecting rod A (10) is connected with the spring A (12) and the damper A (13) through a bolt D (11), the other end of the connecting rod A is connected with the track A (8) and can slide in the track A (8), one end of the connecting rod B (26) is connected with the spring B (22) and the damper B (23) through a bolt H (25), and the other end of the connecting rod B is connected with the track B (27) and can slide in the track B (27); One end of the internal gear shaft (2) is connected with a second driven gear (31), the other end of the internal gear shaft is connected with a track A (8) and can synchronously rotate around the axis, one end of the external gear shaft (29) is connected with a first driven gear (28), and the other end of the external gear shaft is connected with a track B (27) and can synchronously rotate around the axis; the sliding chute A (7) is fixed on the NES disc (17) through a bolt I (44) and a bolt J (45), and the sliding chute A (7) is symmetrical to the input rod (18) and perpendicular to the input rod (18); the sliding block C (42) and the sliding block D (43) can freely move in the sliding groove A (7); the rack (46) is respectively connected with the sliding block C (42) and the sliding block D (43) through the bolt A (5) and the bolt B (6) The sensor (3) transmits the collected input shaft operation information data to the first ECU (1) and the second ECU (4).
  2. 2. An orbital rotary nonlinear energy sink with multi-parameter adjustable stiffness damping inertia according to claim 1, wherein the input rod (18) is held in contact with the links a (10) and B (26) in an initial state, the input rod (18) pushing the links a (10) to move on the orbit a (8) when the input rod (18) rotates clockwise with the input shaft (33), the springs a (12) and the dampers a (13) being compressed under the movement of the links a (10), the input rod (18) pushing the links B (26) to move on the orbit B (27) when the input rod (18) rotates counterclockwise with the input shaft (33), the springs B (22) and the dampers B (23) being compressed under the movement of the links B (26).
  3. 3. An orbital rotation nonlinear energy sink with multi-parameter adjustable stiffness damping inertia according to claim 1, characterized in that the first driven gear (28), the second driven gear (31) and the gear B (32) are comprised of intermeshing straight bevel gears with the same modulus, thickness, pressure angle and number of teeth, the shafts to which the straight bevel gears are connected are different, the nominal shaft diameters are different, and minimal backlash is applied to prevent shock, noise and backlash under lubrication and normal operating temperatures.
  4. 4. An orbital rotation nonlinear energy sink with stiffness damping inertia multi-parameter adjustment according to claim 1, wherein the gear a (30) and the rack (46) are gear-rack fit, and the modulus, thickness and pressure angle of the gear-rack are the same.
  5. 5. The multi-parameter adjustable track type rotary nonlinear energy sink with rigidity and damping inertia according to claim 1, wherein the hardness of the rack (46) is larger than that of the gear a (30) to ensure that the rack (46) is not weakened by the gear a (30), the rack (46) has larger mass to meet the characteristic of adjustable moment of inertia, and the rack is made of high-strength steel.
  6. 6. An orbital rotary nonlinear energy sink with multi-parameter adjustable stiffness damping inertia according to claim 1 wherein the stiffness of the nonlinear energy sink is achieved by link a (10) and link B (26) moving on track a (8) and track B (27), link a (10) compressing spring a (12) and damper a (13) at one end and link B (26) compressing spring B (22) and damper B (23) to achieve essentially nonlinear stiffness and nonlinear damping, the system transmitting energy from input rod (18) to NES disc (17) through the spring and dissipating energy through the damper.
  7. 7. An orbital rotation nonlinear energy sink with multi-parameter adjustable stiffness damping inertia according to claim 1, wherein the bolts a (5), B (6), E (15), F (21), G (24), H (25), I (44) and J (45) are in threaded engagement with the corresponding connectors, and the profile, pitch and direction of rotation are the same.
  8. 8. The multi-parameter adjustable track type rotary nonlinear energy sink with the rigidity and damping inertia according to claim 1, wherein the spring A (12), the damper A (13), the spring B (22) and the damper B (23) are characterized by high strength, stable operation and difficult abrasion.

Description

Multi-parameter adjustable track type rotary nonlinear energy sink with rigidity damping inertia Technical Field The invention belongs to the technical field of vibration noise control, and particularly relates to a track type rotary nonlinear energy sink with rigidity damping inertia and multiple parameter adjustment. Background Vibration is widely existed in the running of rotary machinery, and the damage of the rotary machinery caused by the excessive vibration amplitude is a typical hazard of the stable running of the rotary machinery. How to reduce the negative influence caused by vibration and ensure the normal operation of the rotary machine becomes an important research subject. Today, the working conditions of rotating machines are complex and vibration must be suppressed in order to ensure stable operation of the rotating machine. According to different control principles, the method for controlling vibration can be divided into three types, namely passive control, semi-active control and active control. As a Nonlinear vibration control technology, nonlinear Energy Sink (NES) has received great attention because of its advantage of wider vibration reduction frequency band. Nonlinear energy sink is a passive control technique consisting mainly of three parts, namely a lighter additional mass, a strong nonlinear stiffness and a damping element. In the passive control technology, NES has good effect on vibration suppression due to the advantages of wide vibration reduction frequency band, small additional mass, strong robustness, strong reliability and the like. For rotary machines, it is desirable to design a rotationally non-linear energy sink to dampen it. In the existing structure, the structures of the rotary nonlinear energy sink are rotary gap type nonlinear energy sink, rotary steel wire type nonlinear energy sink, rotary magnetic force type nonlinear energy sink and the like, but the rotary nonlinear energy sink structure capable of realizing continuous adjustment of nonlinear rigidity and nonlinear damping is less. Aiming at the defects of the prior art, the invention provides the track type rotary nonlinear energy sink with the rigidity damping inertia multi-parameter adjustable, wherein the angle between a track and an input rod is continuously adjusted by a gear control track deflection mechanism through an ECU (electronic control Unit), the nonlinear rigidity and the nonlinear damping are continuously adjustable, a rack is controlled to move along a chute, and the distance from the center of mass of the rack to the rotation center is changed, so that the rotational inertia of the rack is adjustable. Disclosure of Invention Aiming at the defects and shortcomings existing in the prior art, the invention provides the track type rotary nonlinear energy sink with the rigidity damping inertia and multiple parameter adjustment, which is simple in structure and easy to operate, and the nonlinear rigidity, the nonlinear damping and the moment of inertia of the device can be continuously controlled through the data of the sensor under the condition of not replacing or disassembling the structure, so that the NES related parameters reach the optimal values, and the nonlinear energy sink achieves the optimal vibration reduction effect. The rotational nonlinear energy sink is suitable for vibration suppression of a rotating machine structure, and is also suitable for vibration suppression of a rotor system. The invention provides an orbit type rotation nonlinear energy sink with rigidity damping inertia and multiple parameter adjustment, which realizes the technical purpose by using the following technical means. The utility model provides a rotatory nonlinear energy sink of track formula with rigidity damping inertia multiparameter is adjustable, including first ECU (1), internal gear axle (2), sensor (3), second ECU (4), bolt A (5), bolt B (6), spout A (7), track A (8), bolt C (9), connecting rod A (10), bolt D (11), spring A (12), attenuator A (13), slider A (14), bolt E (15), spout B (16), NES disc (17), input pole (18), spout C (19), slider B (20), bolt F (21), spring B (22), attenuator B (23), bolt G (24), bolt H (25), connecting rod B (26), track B (27), first driven gear (28), external gear axle (29), gear A (30), second driven gear (31), gear B (32), input axle (33), bearing (34), packing ring (35), retainer ring (36), upper pin head (37), piston rod (39), casing (40), lower pin head (41), slider C (42), bolt D (44), piston rod J (45) A rack (46); The input shaft (33) can rotate around an axis and transmit the rotating speed and torque of an external system, and the axis of the input shaft (33) is parallel to the axes of the inner gear shaft (2) and the outer gear shaft (29); The input shaft (33) is connected with the input rod (18) and is positioned on the same axis, the input rod is fixed through a gasket (35) and a fixed ring (36), and the input shaft (33) can drive the input rod (18) to