Double-acting air-suspending friction-free air cylinder

Abstract

A double-acting air-suspending friction-free air cylinder comprises a cylinder barrel, a piston, a piston rod, a front end cover and a rear end cover, first blind holes axially punched from one end face of the piston form first air inlet holes, second blind holes radially punched from the piston wall are communicated with the first air inlet holes so as to form first throttling holes, third blind holes axially punched from the other end face of the piston form second air inlet holes, the second air inlet holes and the first air inlet holes on the other end face of the piston form included angles but are not communicated, fourth blind holes radially punched from the piston wall are communicated with the second air inlet holes to form second throttling holes, a circumferential groove is arranged on the middle circumferential surface of the piston and is internally punched along the radial direction of the piston to be led to the circle center so that pressure relief grooves are formed, the pressure relief grooves are uniformly distributed along the circumference direction and are communicated with the first air inlet holes, the second air inlet holes, the first throttling holes and the second throttling holes, and one end, connected with the piston rod, of the piston is punched along the axial center so to be communicated with the pressure relief grooves. The air cylinder achieves air supply by a high-pressure chamber thereof, and an air film is unaffected by high pressure.

Description

technical field

[0001] The invention relates to an air flotation cylinder. Background technique

[0002] Ordinary cylinders usually use mechanical seals, and there is contact friction between the cylinder and the piston.

[0003] Traditional low-friction cylinders rely on improving machining accuracy, using special low-friction materials or grease lubrication to reduce friction, but there are defects such as difficult processing, high cost, difficult maintenance and short life; or by improving the sealing form to reduce friction For example, the German FESTO company uses a special sealing technology to apply to the cylinder, using a one-way sealing ring, which has very small sliding resistance. Japan's SMC company adopts ball guide sleeve technology and gap sealing technology. This low-friction cylinder has made breakthroughs in uniform velocity, high and low pressure friction, high speed and high frequency. Complicated, difficult to process and manufacture, and expens...

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