Low-internal-leakage load-deflection resistance hydraulic cylinder system

Abstract

The invention relates to a low-internal-leakage load-deflection resistance hydraulic cylinder system. The system comprises a cylinder body, a piston arranged in a piston chamber of the cylinder body,and a piston rod, wherein the piston rod is connected with the piston and extends out of the cylinder body through a piston rod channel in the cylinder body. The piston chamber is divided into a leftpart and a right part by the piston. The system further comprises a static pressure supporting bearing and an oil control device, wherein the static pressure supporting bearing is fixedly arranged inthe piston rod channel and is arranged outside the piston rod in a sleeving manner, and the oil control device is connected with an oil communication hole in the cylinder body. Compared with the priorart, the low-internal-leakage load-deflection resistance hydraulic cylinder system has the advantages of being lower in internal leakage, effectively resistant to load deflection, and the like.

Description

technical field [0001] The invention relates to the field of hydraulic cylinders, in particular to a low internal leakage anti-offset load hydraulic cylinder system. Background technique [0002] As the actuator of the hydraulic system, the performance of the hydraulic cylinder directly affects the control accuracy and response speed of the system. Hydraulic cylinders used in aerospace and other fields require low friction and anti-offset load capabilities to meet heavy and off-load requirements. The piston rod and cylinder body of the hydraulic cylinder and the piston and cylinder body are usually sealed with seals, which increases the frictional resistance when the piston moves and reduces the dynamic performance of the hydraulic cylinder. At the same time, in actual working conditions, the hydraulic cylinder will bear a certain lateral partial load, and the lateral partial load will increase the friction force at the seal of the hydraulic cylinder, which will eventually ...

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent "A hinged structure anti-eccentric load heavy-duty servo hydraulic cylinder" (publication number: CN207961141U) designs a hinged structure anti-eccentric load hydraulic cylinder, which uses a hinged connection between the piston rod and the piston to effectively avoid the piston and the cylinder Cylinder eccentric load friction, thereby improving the service life of the hydraulic cylinder, but it cannot reduce the friction between the piston rod and the cylinder body

Its anti-eccentric load effect is not as good as the combination of static pressure support and forward cone structure in the present invention, and it cannot solve the impact of internal leakage on the performance of hydraulic cylinders

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