A zero-friction cylinder with independent air supply for air-floating pistons based on porous materials

Abstract

The invention discloses a zero-friction cylinder based on a porous material air-floating piston for independent air supply, which includes a piston rod, a cylinder barrel and an air-floating piston. The two ends of the cylinder barrel are respectively provided with an upper end cover and a lower end cover. The upper end cover extends into the cylinder and is fixedly connected with the air-floating piston. The air-floating piston is located in the cylinder with a gap between it and the cylinder. The air-floating piston divides the cavity in the cylinder into the lower high-pressure chamber and the outer cavity. The upper low-pressure chamber communicated with the environment, the cylinder barrel is provided with an air inlet connected with the lower high-pressure chamber, and the air inlet communicates with external air supply equipment. The beneficial effects of the present invention are: to realize zero friction between the air-floating piston and the cylinder, the gas supply pressure of the air-floating piston can be much higher than the gas pressure in the upper low-pressure chamber, and provide a large radial bearing capacity, and the setting of the discharge channel can avoid The high-pressure gas between the air-floating piston and the cylinder can be returned to the upper low-pressure chamber, thereby reducing the pressure fluctuation in the lower high-pressure chamber, breaking the limitation of the low-friction cylinder, and improving the control accuracy of the load position and force.

Description

technical field [0001] The invention relates to the technical field of zero-friction cylinders, in particular to a zero-friction cylinder with independent air supply based on a porous material air-floating piston. Background technique [0002] The traditional low-friction cylinder needs to use special grease and materials with a small friction coefficient. The machining accuracy of the cylinder barrel is extremely high, and a one-way sealing ring needs to be installed on the piston. Precise control of position and force, and high machining accuracy of the cylinder. At the same time, the traditional cylinder pressure measurement method measures the pressure at the cylinder inlet or outlet, and cannot directly obtain the real pressure inside the cylinder cavity. SUMMARY OF THE INVENTION [0003] The invention uses a zero-friction cylinder based on a porous material that independently supplies air to an air-floating piston, and the air-floating piston based on a porous mater...

AI Technical Summary

Problems solved by technology

[0002] Traditional low-friction cylinders require the use of special grease and materials with a small friction coefficient. The machining accuracy of the cylinder barrel is extremely high, and a one-way sealing ring is required on the piston. As a result, the current traditional low-friction cylinder has a complicated structure and cannot Accurate control of position and force, and high machining accuracy of the cylinder

At the same time, the traditional cylinder pressure measurement method is to measure the pressure at the inlet or outlet of the cylinder, and cannot directly obtain the real pressure inside the cylinder cavity.

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