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Zero-friction air cylinder with air bearing

A technology of frictionless cylinders and air bearings, applied in the direction of fluid pressure actuators, etc., can solve the problems of low friction, large stroke, radial load sensitivity, etc., and achieve the effects of reduced friction, simple structure and convenient maintenance

Inactive Publication Date: 2011-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a frictionless cylinder with an air bearing, which not only solves the complex structure, difficult processing and maintenance, radial load and Sensitivity and other defects, but also has the characteristics of large stroke and ultra-low friction

Method used

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Embodiment Construction

[0024] The present invention designs the piston part of the cylinder according to the principle of the air bearing on the basis of the ordinary cylinder, so that it forms a static pressure air bearing journal bearing with the inner wall of the cylinder barrel, and the contact part between the piston rod and the front end cover of the cylinder is the same The air bearing is used to connect, so that the non-contact connection between the movable part and the immovable part of the cylinder is realized, and the friction force is greatly reduced. The cylinder piston designed according to the principle of air bearings sprays compressed air from the inside of the piston to the tiny gap between the piston and the cylinder barrel through the orifices distributed in the circumferential direction of the piston, so that a high-pressure air film is formed in the gap Keep the piston out of contact with the cylinder barrel. When the piston is subjected to a certain radial force, such as a ve...

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Abstract

The invention discloses a zero-friction air cylinder with an air bearing. The zero-friction air cylinder comprises the air bearing and a piston, wherein the air bearing is matched with the piston rod; the piston is designed according to an air-float principle; and the zero-friction support of a moving part and a fixed part of the air cylinder can be realized by the air-float bearing and the piston, namely a high-pressure air film is formed at a contact surface to isolate two surfaces which are supported mutually. Air is provided for the piston in the inner part of the air cylinder by the zero-friction air cylinder through the hollow piston rod and a soft pipe, and spherical hinge connection is applied, thus the zero-friction air cylinder can bear certain radial loading, and the piston is not stuck in the air cylinder; by the zero-friction air cylinder provided by the invention, the friction of the air cylinder is reduced greatly, greater stroke can be realized without lubrication and sealing, the radial force in a certain range can be borne, and the structure is simple and is convenient to maintain.

Description

technical field [0001] The invention relates to a cylinder, in particular to a frictionless cylinder with an air bearing. Background technique [0002] The friction force of the cylinder is generated by contact friction, specifically the friction between the rubber seal ring and the cylinder barrel and the friction between the piston rod and the dust ring. [0003] In order to reduce the friction force, a well-known method is to reduce the friction force of the cylinder by improving the machining accuracy of the cylinder, using special grease, and using materials with a small friction coefficient. This traditional low-friction cylinder reduces friction by improving the smoothness of the contact surface and improving lubrication conditions on the basis of ordinary cylinders. This traditional method reduces the frictional force of the cylinder to a certain extent, but has the defects of difficult processing, high cost, difficult maintenance and short service life. [0004] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/20
Inventor 陶国良朱晓刘昊
Owner ZHEJIANG UNIV
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