An electro-hydraulic valve-controlled displacement module and its application method

Abstract

The invention relates to an electro-hydraulic valve-controlled displacement module and its use method, including a stepping motor, a transmission rod, a feedback connecting rod, a three-position three-way valve, a linear variable differential transformer, a differential cylinder and a differential cylinder liner; The stepper motor is connected to the transmission rod, the differential cylinder liner is fixedly connected to the differential cylinder, the top end of the feedback connecting rod is hinged to the three-position three-way valve, and the bottom end is hinged to the differential cylinder liner. Both sides of the feedback connecting rod are respectively connected to the Transmission rod, linear variable differential transformer hinged. The invention feeds back the motion information of the stepping motor and the differential cylinder to the single-chip microcomputer in real time through the linear variable differential transformer and the feedback connecting rod. Through the accurate calculation of the single-chip microcomputer, the displacement relationship between the stepping motor and the differential cylinder can be precisely controlled, which is convenient The operator precisely controls to achieve accurate adjustment.

Description

technical field [0001] The invention relates to an electro-hydraulic valve-controlled displacement module and a using method thereof, belonging to the technical field of hydraulic pressure. Background technique [0002] As an important part of hydraulic components, control valves are widely used in real life and construction machinery, and displacement control valves are one of the most widely used ones. However, different valves have different functions in different occasions. With the development of science and technology, electronic control systems are gradually applied to traditional purely mechanical structural components, making certain tasks easier. [0003] Chinese patent document CN203009444U discloses a new type of electronically controlled pumping oil cylinder based on magnetostrictive sensors, including two magnetostrictive sensors and two oil cylinders, and the magnetic rulers of the two magnetostrictive sensors are installed on the pistons of the two oil cylind...

AI Technical Summary

Problems solved by technology

Utilizing this characteristic, the input current of the pump can be changed, and the output flow of the pump can be reduced, so that the commutation is softer and the system impact is smaller when commutating, but the structure of the invention is complicated, and two magnetostrictive sensors are installed on two The interior of the piston rod is relatively difficult, and the present invention cannot achieve the purpose of precisely controlling the displacement

[0004] In the hydraulic system applied to construction machinery, due to the large change in the flow required by each actuator within a working cycle and the high precision required, such as the variable plunger pump of the hydraulic system in the excavator, in different working conditions, the plunger pump Different flow changes are required, and the inclination angle of the swash plate needs to be changed accordingly. In the past, it was adjusted by purely mechanical structure feedback. Its structure is complicated, its precision is low, and its maintenance is difficult.

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