Floating type low-friction air cylinder with sealing ring

Abstract

The invention provides a floating type low-friction air cylinder with a sealing ring. The air cylinder comprises a front cover, a rear cover, a cylinder barrel, a piston rod and a piston, the front cover, the cylinder barrel and the rear cover are connected in sequence, the piston rod penetrates through the front cover, and is partially arranged in the cylinder barrel, the piston is arranged in the cylinder barrel and is connected with the piston rod, the air cylinder further comprises one sealing ring and one piston sealing ring groove, wherein the piston sealing ring groove is an annular groove body located on the piston, the section of the piston sealing ring groove is in a Y shape, the section of the sealing ring is in a Y shape, the radial outer surface of the sealing ring is an arc-shaped sealing portion which protrudes outwards, the linear portion of the Y shape of the sealing ring comprises several protrusion sealing portions which axially symmetrically protrude, the sealing ring is sleeved with the piston sealing ring groove, and the inner ring of the sealing ring is not in contact with the groove bottom of the piston sealing ring groove. According to the air cylinder, thepressure of the sealing ring on the cylinder barrel is only generated by the sealing ring material forming supporting force, and the pressure of the sealing ring on sealing of the bottom of the piston sealing ring groove is avoided, so that the pressure is small, and the movement is fast.

Description

technical field [0001] The invention relates to the technical field of cylinders, in particular to a cylinder whose piston adopts a floating low-friction sealing ring. Background technique [0002] Low-friction cylinder refers to the cylinder with small piston sliding resistance, which is often used in the occasion of load support. When the load force value changes, it is used to support and balance the changing load force. Therefore, it is required to have extremely low frictional resistance and fast response speed when the cylinder piston moves. like figure 1 As shown, the sliding resistance of the cylinder piston is generally composed of the friction force of the guide sleeve 1, the support ring 2 and the cylinder seal ring 3. [0003] With the development of self-lubricating engineering plastics, and the application and development of industrial grease in different industries. When the cylinder piston slides, the frictional resistance of the guide sleeve 1 and the sup...

AI Technical Summary

Problems solved by technology

[0005] 1. The design interference pressure of the sealing ring is small, and the relative wear and tear movement life is short;

[0006] 2. When the sealing ring is unilaterally worn by the lateral force, the design interference pressure of the sealing ring is also small, so it cannot be effectively compensated, and it is easy to cause the sealing ring to fail

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