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Hydro-pneumaticspring floating piston

A technology of floating pistons and oil-gas springs, applied in the direction of springs, spring/shock absorbers, gas-hydraulic shock absorbers, etc., can solve problems such as shortened service life, poor lubrication environment of sealing rings, and reduced reliability of oil-gas springs

Inactive Publication Date: 2017-05-31
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high working pressure and the large difference in molecular volume between gas and oil, it is often necessary to use multiple sealing rings. Although this improves the sealing effect, it results in a poor lubricating environment for the middle sealing ring and the sealing ring on the gas side. It is easy to cause early wear of the sealing ring, which greatly shortens the service life and reduces the reliability of the oil and gas spring

Method used

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  • Hydro-pneumaticspring floating piston
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  • Hydro-pneumaticspring floating piston

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0012] figure 1 It is a diagram of the working principle of the oil-gas spring. The inner cavities of the oil cylinder 2 and the cylinder 7 are connected together through the oil passage. The damping valve 4 and the main piston 1 are installed in the oil cylinder 2. A high-pressure combined oil seal is arranged on the main piston 1 for Seal the high-pressure oil 3 in the inner cavity, specific plan 1: a combination of two seals, in which the Ster seal is used as the first oil seal 25, which is arranged on the side close to the hydraulic oil, has a one-way sealing capability, and the sealing direction faces the oil side, the second oil seal 26 close to the side of the oil-gas spring annular chamber can use a gray ring, which has two-way sealing ability, and can also use a step seal with one-way sealing ability, and the sealing direction is towards the oil side....

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Abstract

The invention aims at providing a hydro-pneumaticspring floating piston. The hydro-pneumaticspring floating piston is installed in an air cylinder and used for separating hydraulic oil from high-pressure nitrogen; two seals are arranged on the floating piston, wherein the oil seal is close to the side of high-pressure oil, and the air seal is close to the side of the high-pressure nitrogen; and a three-seal structure can also be adopted, wherein an oil seal is close to the side of the high-pressure oil, a glyd ring is adopted as the oil seal, a main air seal is arranged in the middle of three seals and is a pneumatic sealing type AQ seal, and a vice air seal is arranged on the side of the high-pressure nitrogen and is a step seal with the one-way sealing capacity with the sealing direction facing the high-pressure nitrogen.

Description

technical field [0001] The invention relates to a floating piston used for oil and gas springs, and belongs to the field of hydraulic machinery and vehicles. Background technique [0002] The oil-gas spring is a shock-absorbing device that uses inert gas (nitrogen) as the elastic medium, oil as the force transmission medium, and integrates elastic elements and damping elements. It exhibits very good nonlinear characteristics, and after installing the hydraulic electronic control system, it can also realize functions such as vehicle attitude adjustment and suspension rigid locking. Compared with other suspension systems, oil-pneumatic suspension can fully improve the vehicle's maneuverability, comfort and handling stability, especially to meet the index requirements of special vehicles, engineering vehicles and military vehicles, and has a good development prospect. [0003] The high-pressure combined seal is an important part of the oil-gas spring, and its main function is ...

Claims

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Application Information

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IPC IPC(8): F16F9/06F16F9/34F16F9/36F16F9/32
CPCF16F9/061F16F9/3214F16F9/341F16F9/368
Inventor 毛明陈轶杰桂鹏高晓东杜甫张旭张亚峰韩小玲徐梦岩鞠海洁宁丹
Owner CHINA NORTH VEHICLE RES INST
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