Self-pressure-regulating gas-liquid coupling type fluid pulsation damping device

A technology of gas-liquid coupling and pressure regulating device, which is applied in the direction of fluid pressure actuating device, fluid pressure actuating system components, fluid pressure actuating system testing, etc. Good vibration damping effect, improved reliability and improved maintainability

Active Publication Date: 2022-08-09
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the present is concerned, the existing vibration elimination devices can achieve a good attenuation effect on the pulsation of a specific system to a certain extent, but they are mainly designed for constant pressure systems, and cannot achieve good elimination for variable pressure systems. vibration effect

Method used

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  • Self-pressure-regulating gas-liquid coupling type fluid pulsation damping device
  • Self-pressure-regulating gas-liquid coupling type fluid pulsation damping device
  • Self-pressure-regulating gas-liquid coupling type fluid pulsation damping device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] figure 1 Shown is a preferred embodiment of the self-regulating gas-liquid coupling fluid pulsation vibration damping device. The vibration damping device includes a housing 1, a bladder 2 and a piston 3. There are a liquid chamber 5 and an air chamber 4 isolated by the bladder 2 and the piston 3. The piston can move with the pressure of the liquid chamber 5, and the pressure of the air chamber 4 is adjusted to keep the bladder 2 elastic. The pressure pulsation of the absorbing liquid chamber 5 expands and contracts between the chambers 4 .

[0040] Preferably, the piston 3 can move between the liquid chamber 5 and the air chamber 4 to change the volume of the liquid chamber 5 and the air chamber 4 , and the bladder 2 can expand and contract between the liquid chamber 5 and the air chamber 4 to change the liquid chamber 5 and the air chamber 4 volume.

[0041] Preferably, the housing 1 includes a shock absorber 11 and a pressure regulating device 12 , the shock absorb...

Embodiment 2

[0068] Image 6 Shown is another preferred embodiment of the self-regulating gas-liquid coupling fluid pulsation vibration damping device. The difference between the vibration damping device and Example 1 is that both ends of the bladder 2 are supported on the vibration damping device. on the device 11 and has a cylindrical structure.

[0069] Preferably, the shock absorber 11 includes a first casing 111 , an air cavity joint 112 and a liquid cavity joint 113 , and the bladder 2 is located inside the first casing 111 and is connected to the air cavity joint 112 and the liquid cavity joint 113 , A first air cavity 401 is formed between the inside of the skin bag 2 and the air cavity joint 112 , and a first liquid cavity 501 is formed between the outside of the skin bag 2 and the first shell 111 , and the air cavity joint 112 is configured to communicate with the first air cavity 401 The first air port 1121 of the liquid chamber joint 113 is provided with a first oil port 1131 ...

Embodiment 3

[0078] Figure 7 Shown is another preferred embodiment of the self-regulating gas-liquid coupling fluid pulsation vibration damping device. The difference between the vibration damping device and Embodiment 1 or Embodiment 2 is that the pressure regulating device 12 It includes a second housing 121 and a housing joint 122 connected to the second housing 121 , the piston 3 is located in the second housing 121 and is slidingly fitted with the second housing 121 , and one end of the piston 3 is connected to the second housing 121 A second air cavity 402 is formed therebetween, and a second liquid cavity 502 is formed between the other end of the piston 3 and the second housing 121 , and the second housing 121 is provided with a second air port 1211 communicating with the second air cavity 402 , the housing joint 122 is provided with a second oil port 1221 communicating with the second liquid chamber 502 .

[0079] Preferably, the piston 3 is slidably fitted with the housing 1 , ...

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Abstract

The invention relates to a self-pressure-regulating gas-liquid coupling type fluid pulsation damping device which comprises a shell, a leather bag and a piston, a liquid chamber and an air chamber which are isolated from each other through the leather bag and the piston are arranged in the shell, and a liquid chamber and an air chamber which are isolated from each other through the leather bag and the piston are arranged in the shell. The piston can move along with liquid chamber pressure change caused by oil pressure change of the hydraulic system to change the volume of the liquid chamber and the volume of the air chamber, the pressure of the air chamber is adjusted till air pressure and oil pressure are balanced, and automatic pressure adjustment is achieved so that the leather bag can keep an elastic deformation state. The leather bag can expand and contract between the liquid chamber and the air chamber to absorb pressure pulsation of the liquid chamber, and the function of restraining fluid pulsation is achieved. Aiming at the variable pressure characteristic of a closed system, the device has the characteristics that the pressure of the air chamber is self-adjusted along with the pressure of the liquid chamber and the vibration is reduced according to the gas-liquid coupling principle, and can realize the weakening of fluid pulsation under the wide-range change of the pressure of a hydraulic system in a wide-temperature and wide-frequency range.

Description

1. Technical field [0001] The invention belongs to the technical field of vibration damping of fluid mechanical devices, and particularly relates to a self-regulating gas-liquid coupling type fluid pulsation damping device. 2. Background technology [0002] As the hydraulic system develops in the direction of high speed, high pressure and high power, the vibration and noise problems of the hydraulic energy pipeline system are becoming more and more serious, which has become a bottleneck restricting the development of the hydraulic system in the direction of high pressure and low noise. The vibration of the hydraulic energy pipeline system not only further increases the system noise, but also more easily causes damage to the hydraulic components and reduces the reliability of the hydraulic system. At the same time, the pressure pulsation of the hydraulic system will also cause the hydraulic pipeline to vibrate. In particular, when the pressure pulsation frequency is close to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/00F15B19/00F15B1/02
CPCF15B21/008F15B21/00F15B19/00F15B1/021
Inventor 徐远志王启帆王任源焦宗夏
Owner BEIHANG UNIV
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