CN-122014788-A - Vibration damper and hydraulic system

CN122014788ACN 122014788 ACN122014788 ACN 122014788ACN-122014788-A

Abstract

The application provides a vibration damper and a hydraulic system. The damping device comprises a cylinder body, a piston mechanism, an elastic reset piece and a damping mechanism, wherein a through hole communicated with the inner cavity is formed in the first end of the cylinder body in the axial direction, the piston mechanism comprises a piston plate and a piston rod, the piston plate is arranged in the inner cavity and is connected with the inner peripheral wall of the cylinder body in a sealing sliding mode, channels penetrating through two sides are formed in the piston plate along the thickness direction for enabling damping liquid to circulate, the first end of the piston rod is connected with the piston plate, the second end of the piston rod extends out of the cylinder body to support equipment to be damped, the elastic reset piece is arranged in the inner cavity of the cylinder body, the damping mechanism comprises an inserting piece extending along the axial direction of the cylinder body, the inserting piece corresponds to the channels on the piston plate, vibration energy can be converted into other forms of energy through the arrangement of the piston mechanism, damping of the damping device can be regulated regularly through the arrangement of the channels in the piston mechanism and the inserting piece in the damping mechanism, the operation is simple, and the regulation efficiency is improved.

Inventors

MING PINGZHOU
Fei Neng
CHEN TAO

Assignees

云南电力试验研究院(集团)有限公司

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. A vibration damping device, comprising: The inner cavity of the cylinder body is filled with damping fluid, and a through hole communicated with the inner cavity is formed in the first axial end of the cylinder body; the piston mechanism comprises a piston plate and a piston rod, the piston plate is arranged in the inner cavity and is in sealing sliding connection with the inner peripheral wall of the cylinder body, the piston plate is provided with channels penetrating through two sides along the thickness direction for the damping fluid to circulate, the piston rod is arranged at the through hole in a penetrating manner along the axial direction of the cylinder body, and the first end of the piston rod is connected with the piston plate, and the second end of the piston rod extends out of the cylinder body to support equipment to be damped; an elastic reset piece arranged in the inner cavity of the cylinder body, a first end of the elastic reset piece connected with one side of the piston plate, which is opposite to the piston rod, and a second end connected with the inner wall of the cylinder body, and The damping mechanism is arranged in the inner cavity of the cylinder body and is positioned at one side of the piston plate, which is opposite to the piston rod, and comprises an insertion piece extending along the axial direction of the cylinder body, and the insertion piece corresponds to the channel on the piston plate; When the piston rod is driven by external force to move the piston plate towards the second end, which is close to the cylinder body, in the axial direction, the penetrating piece penetrates through the channel to reduce the flow area of the channel, and the piston plate extrudes the elastic reset piece; when the piston rod is not acted by the external force, the elastic reset piece recovers deformation and pushes the piston plate and the piston rod to move towards a second end which is far away from the cylinder body and is in the axial direction.
2. The vibration damping device according to claim 1, wherein the damping mechanism comprises a first mounting rod and a second mounting rod, the first mounting rod is fixedly arranged in the cylinder body, the second mounting rod is connected with the first mounting rod and extends along the radial direction of the cylinder body, the penetrating piece is a plurality of inserted rods arranged on the second mounting rod, each inserted rod extends along the axial direction of the cylinder body, the channel comprises a plurality of through holes which are in one-to-one correspondence with the inserted rods, and the diameter of each through hole is larger than or equal to the maximum radial dimension of the corresponding inserted rod; The connecting part of the second mounting rod and the first mounting rod is positioned between two ends of the second mounting rod, the plurality of inserting rods are distributed on two sides of the first mounting rod, each side of the first mounting rod is provided with at least two inserting rods, the heights of all inserting rods positioned on the same side of the first mounting rod are gradually increased or gradually decreased from the direction close to the first mounting rod to the direction far away from the first mounting rod, and/or one end of each inserting rod close to the piston plate is of a cone structure.
3. The vibration damper according to claim 2, wherein the damping mechanism further comprises a connecting device and a pair of first limiting members arranged at intervals, one end of each first limiting member is connected to one side of the piston plate, which is opposite to the piston rod, the other end of each first limiting member extends along the axial direction of the cylinder body in a direction away from the piston plate, the first mounting rod is arranged between the pair of first limiting members and extends along the axial direction of the cylinder body, the outer wall of each first mounting rod is provided with an external thread, the connecting device is sleeved outside the first mounting rod and is in threaded connection with the first mounting rod, and the second mounting rod is mounted on the connecting device; The first limiting pieces are located on two opposite sides of the connecting device to limit the connecting device to rotate around the first mounting rod, the first mounting rod is rotatably arranged in the cylinder body, one end of the first mounting rod, which is far away from the piston plate, extends out of the cylinder body, and the first mounting rod is configured to be rotatable to drive the connecting device to move along the axial direction of the cylinder body.
4. The vibration damper according to claim 3, wherein the damping mechanism further comprises a pair of second stoppers disposed at intervals, one end of the second stoppers being fixed to the inner wall of the cylinder, the other end of the second stoppers extending toward the piston plate in the axial direction of the cylinder; The pair of second limiting pieces are in one-to-one correspondence with the pair of first limiting pieces, and each second limiting piece is in sliding fit with the corresponding first limiting piece.
5. The vibration damper according to claim 3, further comprising a rotating device and a mounting base, wherein the mounting base is fixedly connected to the second end of the cylinder in the axial direction, the mounting base is provided with a containing space, the rotating device is arranged in the containing space, one end of the first mounting rod, which is far away from the piston plate, penetrates through the second end of the cylinder in the axial direction and the mounting base and is connected with the rotating device, and the rotating device is used for driving the first mounting rod to rotate so as to adjust the height of the second mounting rod in the axial direction of the cylinder.
6. The vibration damping device according to any one of claims 1 to 5, wherein the piston plate is provided with a one-way return structure including an oil return hole which is a passage penetrating both sides of the piston plate and a cover plate which is provided on a side of the piston plate facing away from the piston rod and is rotatably connected to the piston plate, the cover plate covering the oil return hole, and opening and closing of the cover plate is affected by a flow direction of the damping fluid; When the piston plate moves towards the second end which is far away from the cylinder body and is in the axial direction, the cover plate is opened to enable the damping liquid to pass through, so that the damping liquid connected with one side of the piston rod by the piston plate flows to the other side of the piston plate, and the piston plate is accelerated to reset under the action of the elastic reset piece; if the piston plate moves towards the second end, which is close to the cylinder body, in the axial direction, the cover plate is closed so that the damping fluid cannot pass through.
7. The vibration damping device according to any one of claims 1-5, wherein the elastic restoring member comprises one or more spring members, and the spring members are provided on the periphery of the damping mechanism; And if the number of the spring pieces is a plurality of the spring pieces, the spring pieces are symmetrically arranged on the periphery of the damping mechanism in the circumferential direction.
8. The vibration damping device according to any one of claims 1-5, wherein the piston mechanism further comprises a support seat connected to the second end of the piston rod, the support seat being adapted to connect the device to be damped, the axial position of the support seat relative to the piston rod being adjustable for adapting the position of the device to be damped.
9. The vibration damping device according to claim 8, wherein the piston mechanism further comprises an adjusting support rod and a locking structure, the locking structure is arranged at the second end of the piston rod, one end of the adjusting support rod is fixed to the support seat, a mounting channel is formed in the end portion of the second end of the piston rod along the axial direction of the piston rod, the adjusting support rod is slidably inserted into the mounting channel, and the locking structure is used for fixing the adjusting support rod so as to fix the height of the support seat in the axial direction of the piston rod.
10. A hydraulic system comprising an oil pump, a motor and a vibration damping device according to any one of claims 1-9, wherein the oil pump is connected to the motor, and a second end of the piston rod in the vibration damping device is used for supporting the oil pump to dampen vibration of the oil pump.

Description

Vibration damper and hydraulic system Technical Field The invention relates to the technical field of vibration reduction, in particular to a vibration reduction device and a hydraulic system. Background The vibration of the equipment to be damped (such as an oil pump) is generated in the operation process, the vibration not only can influence the accuracy required to be maintained for the operation of the equipment to be damped, but also can cause the problems of loosening of joints of a plurality of devices of the equipment, fatigue damage of parts and the like, and even threatens the overall operation safety of the unit when serious. Therefore, it is important to suppress the vibration of the device to be damped. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a vibration damping device capable of effectively suppressing vibration of an apparatus to be damped, and a hydraulic system. In order to achieve the above object, the present application provides a vibration damping device comprising: The inner cavity of the cylinder is filled with damping fluid, and a through hole communicated with the inner cavity is formed in the first axial end of the cylinder; The piston mechanism comprises a piston plate and a piston rod, the piston plate is arranged in the inner cavity and is connected with the inner peripheral wall of the cylinder in a sealing sliding manner, channels penetrating through two sides of the piston plate are formed in the thickness direction of the piston plate for damping fluid to circulate, the piston rod is arranged at the through hole in a penetrating manner in the axial direction of the cylinder in a sliding manner, and the first end of the piston rod is connected with the piston plate, and the second end of the piston rod extends out of the cylinder to support equipment to be damped; an elastic reset piece arranged in the inner cavity of the cylinder body, a first end of the elastic reset piece connected with one side of the piston plate back to the piston rod, a second end connected with the inner wall of the cylinder body, and The damping mechanism is arranged in the inner cavity of the cylinder body and is positioned at one side of the piston plate, which is opposite to the piston rod, and comprises an insertion piece extending along the axial direction of the cylinder body, and the insertion piece corresponds to the channel on the piston plate; When the piston rod is not acted by external force, the elastic reset piece is restored to deform and pushes the piston plate and the piston rod to move towards the second end far away from the cylinder body in the axial direction. In one possible embodiment, the damping mechanism comprises a first mounting rod and a second mounting rod, the first mounting rod is fixedly arranged in the cylinder, and the second mounting rod is connected with the first mounting rod and extends along the radial direction of the cylinder; the penetrating insert is a plurality of inserted bars arranged on the second mounting bar, each inserted bar extends along the axial direction of the cylinder body, and the channel comprises a plurality of through holes which are in one-to-one correspondence with the inserted bars; The connecting part of the second mounting rod and the first mounting rod is positioned between two ends of the second mounting rod, a plurality of inserting rods are distributed on two sides of the first mounting rod, at least two inserting rods are respectively arranged on each side of the first mounting rod, the heights of all inserting rods positioned on the same side of the first mounting rod are gradually increased or gradually decreased from the direction close to the first mounting rod to the direction far away from the first mounting rod, and/or one end of each inserting rod close to the piston plate is in a cone structure. In one possible embodiment, the damping mechanism further comprises a connecting device and a pair of first limiting members arranged at intervals, one end of each first limiting member is connected to one side of the piston plate, which is opposite to the piston rod, the other end of each first limiting member extends along the axial direction of the cylinder body in a direction away from the piston plate, the first mounting rod is arranged between the pair of first limiting members and extends along the axial direction of the cylinder body, the outer wall of the first mounting rod is provided with an external thread, the connecting device is sleeved outside the first mounting rod and is in threaded connection with the first mounting rod, and the second mounting rod is mounted on the connecting device; the first mounting rods are rotatably arranged in the cylinder body, one ends of the first mounting rods, which are far away from the piston plate, extend out of the cylinder body, and the first mountin