Direct-drive type high-response axial plunger type variable hydraulic motor with servo motor

Abstract

The invention discloses a direct-drive type high-response axial plunger type variable hydraulic motor with a servo motor. The variable displacement mechanism of the direct-drive type high-response axial plunger type variable hydraulic motor comprises a servo motor, a variable control lever, a displacement sensor and a servo driving controller, wherein the output end of the servo driving controller is connected with the servo motor, and a rotor of the servo motor is fixedly connected with one end of the variable control lever; the other end of the variable control lever is positioned in a sliding groove of the displacement sensor, and the variable control lever can move to and fro in the sliding groove; and the end part of a driver pin of an oil distribution disc of the hydraulic variable displacement motor is fixedly connected with the variable control lever, and the displacement sensor is connected with a first signal feedback end of the servo driving controller. The variable hydraulic motor is simple and reasonable in structure, variable displacement and high frequency response and high precision stepless adjustment of variable torque output are realized on the axial plunger type variable hydraulic motor, and the whole adjustment process is smooth and is free of vibration.

Description

technical field [0001] The invention relates to an axial piston type hydraulic variable motor, in particular to a hydraulic variable motor for realizing rapid and precise variable displacement control or torque control. Background technique [0002] As an actuator of the hydraulic system, the hydraulic motor converts the hydraulic energy of the liquid into the mechanical energy of the output shaft, and is widely used in the hydraulic transmission system. Under the action of the variable control device, the hydraulic variable motor can adjust its output characteristics within a certain range according to the needs of the work, and realize steplessly variable displacement. Variable speed motors and variable pumps are often used in open and closed loops of hydraulic systems to form volumetric speed control loops. They have high efficiency and significant energy-saving effects, and are widely used in many hydraulic equipment. The dynamic response frequency of the variable mecha...

AI Technical Summary

Problems solved by technology

[0003] The traditional hydraulic variable motor needs to convert the electric signal into the spool opening of the hydraulic valve through the proportional electromagnet to realize the variable. The stroke of the variable piston is controlled by the hydraulic valve. After three control links, the response of the variable link is slow, generally at 10Hz. The following occasions cannot meet some requirements to realize the rapid response of the output characteristics of the hydraulic variable motor

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