Independent controllable large rotating angle electrohydraulic servo oscillating hydraulic cylinder

Abstract

The invention relates to an independent controllable large rotating angle electrohydraulic servo oscillating hydraulic cylinder, comprising a hydraulic cylinder, a screw cylinder and a control system. The hydraulic cylinder comprises a left cylinder cover, a hydraulic cylinder and a piston; the screw cylinder comprises a screw cylinder barrel, a right cylinder cover and a screw piston; a connecting transparent cover is arranged between the hydraulic cylinder barrel and the screw cylinder barrel; an output screw passes through the middle parts of the hydraulic cylinder and the screw cylinder; a photoelectric encoder installed at the end part of the output screw is arranged on the left side of the hydraulic cylinder; an output end shaft of the output screw is arranged on the right side of the screw cylinder; the piston of the hydraulic cylinder is sleeved on the screw and a small end of the piston passes through the connecting transparent cover; the screw piston is sleeved at the right end of the piston of the hydraulic cylinder through an axial limiting device; a wearproof screw bushing is embedded in the screw cylinder barrel; the rotating direction of the wearproof screw bushing is opposite to that of the output screw; and the output screw in the screw cylinder barrel is provided with a roll ball screw nut which is fixedly connected with a small end of the screw piston. By adopting two sections of screw output, the independent controllable large rotating angle electrohydraulic servo oscillating hydraulic cylinder has compact structure, high low-speed stability and large output torque.

Description

technical field [0001] The invention relates to a hydraulic actuator, in particular to an independently controllable large-angle electro-hydraulic servo swing hydraulic cylinder. Background technique [0002] The swing hydraulic cylinder is a hydraulic actuator that can output reciprocating swing motion, so it is also called a swing hydraulic motor. This hydraulic cylinder is often used in indexing mechanisms, indexing devices, manipulators, and various metallurgical machinery, petrochemical machinery, and mining machinery. At present, there are two main types of swing hydraulic cylinders used in China: vane type and piston combined type. The vane type swing hydraulic cylinder is divided into single vane type and double vane type. The biggest disadvantage is that the hydraulic cylinder has a large structural size, small output torque, output rotation angle less than 360°, poor sealing performance, and changes in internal leakage will affect the servo system. performance. ...

AI Technical Summary

Problems solved by technology

The main disadvantages of this type of swing hydraulic cylinder are that the structure is not compact, the low-speed performance is poor, the screw pair has large leakage, and the efficiency is low.

Images