Blade type oscillating hydraulic cylinder with fully-closed cage sealing system

Abstract

The invention discloses a blade type oscillating hydraulic cylinder with a fully-closed cage sealing system. The blade type oscillating hydraulic cylinder comprises a stator, a rotor, a cover plate and end face seals, wherein stator support bodies and rotor support bodies are arranged between the end face seals; a first rectangular tank which is used for containing a stator blade is arranged on each stator support body along the axial direction of the stator, and a stator blade seal surrounds the stator blade and is in contact type sealing connection to the bottom of the first rectangular tank, the end seal and the outer wall of the rotor; and a second rectangular tank which is used for containing a rotor blade is arranged on each rotor support body along the axial direction of the rotor, and a rotor blade seal surrounds the rotor blade and is in contact type sealing connection to the bottom of the second rectangular tank, the end seal and the inner wall of the stator. The boundaries of all oil chambers are fully sealed, so that the internal and external leakage of the oscillating hydraulic cylinder can be effectively reduced or avoided, oil pressure loss is reduced or avoided, and the working oil pressure, volumetric efficiency and reliability of the oscillating hydraulic cylinder are increased. The sealing system has the advantages of simplicity and good feasibility.

Description

technical field [0001] The invention relates to the field of vane-type swing hydraulic cylinder and its sealing technology, in particular to a vane-type swing hydraulic cylinder with a fully enclosed cage-type sealing system. Background technique [0002] The vane-type swing hydraulic cylinder (hereinafter referred to as the swing cylinder) can directly convert the oil pressure acting on the vane into torque output. It has the advantages of compact structure, no loss of mechanical transmission efficiency, stable torque output, good controllability, and easy isolation of external dust. And other advantages, it has broad application prospects in military, shipbuilding, aviation, metallurgical machinery, mechanical arms and other fields. The sealing performance, especially the internal and external leakage, has a decisive impact on the performance of the hydraulic cylinder, and there are many surfaces that need to be sealed in the swing cylinder. The sealing system is far more ...

AI Technical Summary

Problems solved by technology

The sealing performance, especially the internal and external leakage, has a decisive impact on the performance of the hydraulic cylinder. However, there are many surfaces that need to be sealed in the swing cylinder, and its sealing system is far more complicated than that of the general linear cylinder. Application critical bottlenecks

Images