Hydraulic double cylinder or multi-cylinder synchronous control system

Abstract

The invention relates to a synchronous control system with two hydraulic cylinders or a plurality of the hydraulic cylinders, which is combined with a hydraulic system and mainly comprises an eddy plate, an electro-hydraulic proportional speed control valve, hydraulic cylinder stroke detectors, and a PLC controller. The eddy plate with the electro-hydraulic proportional speed control valve is coupled in an oil feed path of the hydraulic system, and oil flows through the eddy plate with the electro-hydraulic proportional speed control valve and enters into hydraulic cylinders of the hydraulic system; and each hydraulic cylinder is provided with one hydraulic cylinder stroke detector which is in charge of inputting a stroke detection signal to the PLC controller, and the PLC controller inputs a proportional speed control signal to the electro-hydraulic proportional speed control valve according to the received stroke detection signal so as to control the proportional speed control valve to adjust the oil flow rate thereof. The control system can achieve the synchronous and precise running of the two hydraulic cylinders or the plurality of the hydraulic cylinders so as to improve the reliability and the safety of the running of the hydraulic system, and has the advantages of high synchronous control precision and fast response speed.

Description

technical field [0001] The invention relates to a control system for realizing synchronous operation of double cylinders or multiple cylinders in a hydraulic system. Background technique [0002] In a hydraulic double-cylinder or multi-cylinder transmission system, the synchronous operation control system is extremely important for the safety and reliability of equipment operation. At present, most of the synchronous deviation correction control systems widely used are flow synchronous control type, because this kind of synchronous deviation correction control system has the advantages of simple structure, easy control and low cost. The flow synchronous control type correction system commonly used in the industry is a bypass oil discharge type system. This system has the defects of slow response speed and low control accuracy during the control process, especially for large loads, long strokes, and frequent scheduling. Or the underbalanced hydraulic double cylinder or multi...

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a double-cylinder or multi-cylinder synchronous control system in a hydraulic system. The system can realize the synchronous and precise operation of the double-cylinder or multi-cylinder, improve the reliability and safety of the hydraulic system operation, and overcome the existing double-cylinder or multi-cylinder synchronous control system. The flow control synchronous rectification system widely used in the cylinder hydraulic system has the defects of slow response speed, low control accuracy, and inability to adapt to large load, long stroke, and frequent dispatch of hydraulic double-cylinder or multi-cylinder systems.

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