Digital valve driven by motor

Abstract

The invention relates to a digital valve driven by a motor. The digital valve driven by the motor comprises the motor, a digital valve assembly and a controller microcomputer or a PLC (programmable logic controller), wherein the motor is connected with the digital valve assembly, receives digital pulse signals sent by the controller microcomputer or the PLC, controls product output flow magnitudeand closing, and completes multipoint and multispeed control of a single cylinder or multiple cylinders and synchronous interpolation motion of the multiple cylinders, one end of a threaded sleeve ofthe digital valve assembly is fixed on the motor, the other end of the threaded sleeve of the digital valve assembly is connected with a connection rod in a threaded mode, the connection rod, a valvecore and a positioning sleeve are connected into a whole through a positioning pin, an anti-rotating screw fixed on an end cap penetrates into a groove in the positioning sleeve, and when the motor rotates, the connection rod cannot rotate due to the action of the positioning pin, and changes motion into linear motion through threads of the threaded sleeve and the connection rod so as to enable the valve core and a valve body to perform relative linear displacement motion, thereby changing the opening degree of all oil ports of the valve body or closing the oil ports of the valve body. The digital valve driven by the motor has the advantages of being high in control accuracy, high in pollution resistance, simple in structure and low in cost.

Description

technical field [0001] The invention relates to a servo valve or a proportional valve in the hydraulic field, in particular to a motor-driven digital valve, which is applied in the hydraulic field and used to control the running direction and running speed of actuators such as hydraulic cylinders or hydraulic motors. Background technique [0002] In hydraulic fluid transmission, it is often necessary to precisely control the direction, speed and position of actuators such as cylinders. The traditional method is to use a servo valve or a proportional valve. These two valves change the opening of the valve port according to the magnitude of the control current or voltage signal, thereby controlling the passing flow, and then controlling the direction, speed and position of the cylinder. [0003] Typical proportional servo valves, such as image 3 As shown, this is a two-stage proportional servo valve, which is composed of a main stage 15, a pilot stage 16 and a displacement se...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of high cost and difficult debugging of existing servo valves or proportional valves, and provide a motor-driven digital valve with a new structure. The technical problem to be solved is to make it have direction, The digital control valve with simple structure and low cost for flow and proportional control is more suitable for practical applications

Images