Universal double-acting gas floating frictionless cylinder

Abstract

The invention provides a universal double-acting gas floating frictionless cylinder. The universal double-acting gas floating frictionless cylinder comprises an air bearing installed on a centripetaljoint bearing through a sleeve and matched with a piston rod, and a self-designed gas floating piston. External supplied gas of the hollow piston rod enters a gap between the gas floating piston and acylinder barrel to form a gas film, and then the gas is discharged out of the hollow piston rod. In this way, a piston rod-piston assembly penetrating the air bearing can move in a frictionless manner. Due to the effects of the centripetal joint bearing, the phenomenon that because of the assembling error or the radial load, the piston-piston rod assembly is stuck in the cylinder barrel can be avoided to a certain extent. According to the universal double-acting gas floating frictionless cylinder, by means of external independent gas supply and self gas discharging, it can be guaranteed thattwo cavities of the cylinder can still achieve the frictionless movement under the lower pressure effects.

Description

technical field [0001] The invention relates to an air flotation cylinder, in particular to a general double-acting air flotation frictionless cylinder. Background technique [0002] Usually, ordinary cylinders have friction, and the friction occurs between the piston seal ring and the inner wall of the cylinder barrel, and between the piston rod and the dust seal ring of the end cover. [0003] Traditionally, methods for reducing friction in cylinders usually include improving machining accuracy to reduce surface roughness, selecting materials with low friction coefficients, adopting new types of grease, and improving sealing forms. Although the traditional method can reduce the friction of the cylinder to a certain extent, it has the disadvantages of high manufacturing cost, difficult processing and maintenance, and short service life. With the innovation of technology, the adoption of gap seal and ball guide sleeve technology greatly reduces the friction of the cylinder,...

AI Technical Summary

Problems solved by technology

However, there is such a defect in this design, that is, when the air pressure in the two chambers is relatively small, an air film that is enough to carry the piston so that the piston and the inner wall of the cylinder cannot be produced, then the frictionless cylinder will fail

Therefore, whether the above-mentioned air-floating frictionless cylinder can work normally is limited by the working air pressure of the two chambers.

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