Leakage-proof pressure-bearing hydraulic cylinder

Abstract

The invention relates to a leakage-proof pressure-bearing hydraulic cylinder which comprises a left cylinder cover, a right cylinder cover, a cylinder drum, a cylinder rod, a piston and pressure bearing pieces. The cylinder drum is coaxially and fixedly arranged between the left cylinder cover and the right cylinder cover. The piston slides in the cylinder drum coaxially. The pressure bearing pieces are symmetrically arranged on the front radial face and the rear radial face of the piston respectively. The pressure bearing pieces are coaxially and fixedly arranged on the piston through clamping rings. Seals are coaxially arranged between the pressure bearing pieces and the radial faces of the piston. The leakage-proof pressure-bearing hydraulic cylinder is characterized in that two identical sealing rings are embedded in the portions, between the piston and the inner walls of the cylinder drum, of the cylindrical surface of the piston respectively, the sealing rings are groove type sealing rings, and the opening portions of the two groove type sealing rings are communicated with oil cavities formed in two sides respectively through an oil duct. The groove type sealing rings are adopted by the axial sealing rings of the hydraulic cylinder, and the two groove type sealing rings are communicated with the left oil cavity and the right oil cavity respectively, so that the sealing rings are expanded along with the changes of pressure, and the sealing performance is improved.

Description

technical field [0001] The invention belongs to the field of hydraulic machinery, and relates to a hydraulic cylinder, in particular to a leak-proof pressure-bearing hydraulic cylinder. Background technique [0002] Pressure-bearing hydraulic cylinders are used in heavy-pressure situations, so it is necessary to install pressure-bearing plates on the pistons. Due to the effect of high pressure, a higher degree of sealing is usually required. However, the existing seal usually adopts a sealing ring, and a sealing ring is also used between the pressure-bearing plate and the piston. The action of high pressure is easy to flatten the sealing ring and cause leakage. Therefore, it is very important to find a sealing structure that can continue to maintain sealing under high pressure and prevent leakage. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the prior art and provide a leak-proof pressurized hydraulic cylinde...

AI Technical Summary

Problems solved by technology

However, the existing sealing usually uses a sealing ring, and a sealing ring is also used between the pressure-bearing plate and the piston. The action of high pressure can easily flatten the sealing ring and cause leakage.

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