CN214945998U

CN214945998U - Cavity compensation damper

Info

Publication number: CN214945998U
Application number: CN202121271716.7U
Authority: CN
Inventors: 龚金宏; 赵红; 李智勇; 董树平
Original assignee: Nanjing Jiangkai Auto Parts Co ltd
Current assignee: Nanjing Jiangkai Auto Parts Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-11-30
Anticipated expiration: 2031-06-08

Abstract

The utility model belongs to the attenuator field, especially cavity compensation attenuator, including the uide bushing, the piston rod is installed to the one end of uide bushing, install damping piston, compensating piston and isolation piston in the uide bushing in proper order, and compensating piston is located between damping piston and the isolation piston, compensating piston includes retaining ring, valve block and piston, the retaining ring is installed on the piston, and the retaining ring is located one side that compensating piston is close to damping piston. The utility model discloses increase dynamic response speed, eliminate the invalid cavity in the attenuator.

Description

Cavity compensation damper

Technical Field

The utility model relates to a attenuator technical field especially relates to cavity compensation attenuator.

Background

The damper is a device for providing resistance to movement and reducing movement energy. It is not a new technology to absorb energy and shock by damping, and various dampers (or shock absorbers) have been used in the industries of aerospace, aviation, war industry, gun, automobile, etc. to reduce vibration and dissipate energy, which is a vibration control device sensitive to speed;

the hydraulic damper is mainly suitable for the vibration resistance of pipelines and equipment in nuclear power plants, thermal power plants, chemical plants, steel plants and the like. The system is often used for controlling the piping vibration of impulsive fluid vibration (such as main valve rapid closing, safety valve discharge, water hammer, broken pipe and other impact excitation) and earthquake excitation; the liquid damper cannot effectively control the vibration of low amplitude high frequency or high amplitude low frequency. However, in the existing damper, the piston rod occupies a part of space, so that hydraulic oil cannot be filled in the cavity, and the damper is slow in response.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art, and providing a cavity compensation damper.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

cavity compensation attenuator, including the uide bushing, the piston rod is installed to the one end of uide bushing, install damping piston, compensating piston and isolation piston in the uide bushing in proper order, and the compensating piston is located between damping piston and the isolation piston, the compensating piston includes retaining ring, valve block and piston, the retaining ring is installed on the piston, and the retaining ring is located one side that the compensating piston is close to the damping piston.

Preferably, a sealing ring is installed in the guide sleeve, the sealing ring is located between the damping piston and the piston rod, and the sealing ring is located on one side, far away from the compensation piston, of the damping piston.

Preferably, one end of an auxiliary spring is installed on one side, far away from the compensation piston, of the isolation piston, and the other end of the auxiliary spring is installed on the inner wall of the guide sleeve.

Preferably, the center position of the piston is provided with a damping hole, and the periphery of the piston is provided with oil return holes.

Preferably, a valve plate is installed at an opening of the oil return hole.

The utility model discloses in, cavity compensation damper increases dynamic response speed, eliminates the invalid cavity in the attenuator.

Drawings

Fig. 1 is a schematic structural diagram of a cavity compensation damper provided by the present invention;

fig. 2 is a schematic view of a compensating piston structure of the cavity compensating damper of the present invention.

In the figure: 1 piston rod, 2 guide sleeves, 3 sealing rings, 4 damping pistons, 5 compensating pistons, 6 isolating pistons, 7 auxiliary springs, 51 check rings, 52 valve plates, 53 pistons, 54 oil return holes and 55 damping holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-2, the cavity compensation damper comprises a guide sleeve 2, a piston rod 1 is installed at one end of the guide sleeve 2, a damping piston 4, a compensation piston 5 and an isolation piston 6 are sequentially installed in the guide sleeve 2, the compensation piston 5 is located between the damping piston 4 and the isolation piston 6, the compensation piston 5 comprises a check ring 51, a valve plate 52 and a piston 53, the check ring 51 is installed on the piston 53, and the check ring 51 is located on one side, close to the damping piston 4, of the compensation piston 5.

The utility model discloses in, install sealing washer 3 in the uide bushing 2, and sealing washer 3 is located between damping piston 4 and the piston rod 1, and sealing washer 3 is located one side that compensation piston 5 was kept away from to damping piston 4.

The utility model discloses in, keep apart piston 6 and keep away from one side of compensating piston 5 and install the one end of auxiliary spring 7, the other end of auxiliary spring 7 is installed on the inner wall of uide bushing 2.

The utility model discloses in, damping hole 55 has been seted up to the central point of piston 53, and oil gallery 54 has all been seted up to piston 53's position all around.

In the utility model discloses in, valve block 52 is installed to the opening part of oil gallery 54.

In the utility model, the piston rod is connected with the piston, the guide sleeve is responsible for the guide function of the piston rod, and the sealing ring is responsible for the guide and the sealing of the piston rod; the part which generates damping when the piston stretches or stretches can select unidirectional damping and bidirectional damping according to requirements; the compensating piston is a one-way valve blocking mechanism, the cylinder barrel is divided into a working cavity and an oil storage cavity, and a vacuum effect is generated in the working cavity due to small resistance below the piston during blocking and eliminating compression, so that a cavity is generated (hydraulic oil flows during compression, a valve plate is pushed to block a backflow hole, the hydraulic oil can only pass through a damping hole, blocking force is generated, and the vacuum effect caused by small resistance is eliminated); when the piston rod is stretched, a cavity generated by pulling out the piston rod can be quickly compensated through the return hole (when the piston is stretched, the piston moves upwards, hydraulic oil passes through the oil return hole to push away the valve plate, and the cavity generated by pulling out the piston rod is quickly compensated); the isolation piston is arranged below the compensation piston and is used for eliminating a cavity below the compensation piston; the auxiliary spring is used for assisting the damper to quickly reset the isolation piston when the damper is extended so as to push the hydraulic oil back to the working cavity.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. Cavity compensation damper, its characterized in that includes uide bushing (2), piston rod (1) is installed to the one end of uide bushing (2), install damping piston (4), compensating piston (5) and isolation piston (6) in proper order in uide bushing (2), and compensating piston (5) are located between damping piston (4) and the isolation piston (6), compensating piston (5) are including retaining ring (51), valve block (52) and piston (53), retaining ring (51) are installed on piston (53), and retaining ring (51) are located compensating piston (5) and are close to one side of damping piston (4).

2. Cavity compensation damper according to claim 1, characterized in that a sealing ring (3) is mounted in the guide sleeve (2), and the sealing ring (3) is located between the damping piston (4) and the piston rod (1), and the sealing ring (3) is located on the side of the damping piston (4) away from the compensation piston (5).

3. Cavity compensated damper according to claim 1, characterized in that the side of the isolating piston (6) remote from the compensating piston (5) is fitted with one end of an auxiliary spring (7), the other end of the auxiliary spring (7) being fitted on the inner wall of the guide sleeve (2).

4. The cavity compensation damper according to claim 1, wherein the center of the piston (53) is provided with a damping hole (55), and the periphery of the piston (53) is provided with oil return holes (54).

5. A cavity compensation damper according to claim 4, characterized in that a valve plate (52) is installed at the opening of the oil return hole (54).