Oil and gas spring type self-lubricating compensation floating piston

Abstract

The invention aims at providing an oil and gas spring type self-lubricating compensation floating piston. The oil and gas spring type self-lubricating compensation floating piston comprises a small piston, an automatic lubricating floating piston, a small piston sealing ring and a clamp spring, wherein the small piston is sheathed in a center weight reducing groove of the automatic lubricating floating piston; lubricating oil or lubricating grease is arranged into an oil storage cavity surrounded by the small piston and the automatic lubricating floating piston; the small piston sealing ring is arranged in the small piston in the radial direction, and is matched with the inner wall of a weight reducing hole to form radial sealing; the clamp spring is arranged at the upper end of the weight reducing hole, so as to prevent the small piston from falling down from the automatic lubricating floating piston during high-speed movement; the side surface of the automatic lubricating floating piston is processed with a radial lubricating oil passage and a peripheral lubricating oil passage, a lubricating oil groove is arranged between a sealing ring at the oil side and a sealing ring at the gas side, and the lubricating oil passage is used for guiding the lubricating oil in the oil storage cavity into the lubricating oil tank and a radial gap between the automatic lubricating floating piston and a cylinder body.

Description

technical field [0001] The invention relates to a self-lubricating and compensating floating piston for an oil-gas spring, which 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 spri...

AI Technical Summary

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

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