Digital electric-hydraulic synchronous control system

Abstract

The invention discloses a digital electric-hydraulic synchronous control system, which comprises a hydraulic actuating mechanism, a digital synchronous control mechanism for performing synchronous control on the hydraulic actuating mechanism, an electric-hydraulic power source for providing power oil for the hydraulic actuating mechanism and the digital synchronous control mechanism, and an electric-hydraulic control system for controlling the power source and the synchronous control mechanism. The hydraulic actuating mechanism is a hydrocylinder; the electric-hydraulic power source comprises an oil storage tank, a double-acting hydraulic oil pump and a driving motor; the electric-hydraulic control system comprises a detector for detecting the oil pressure of the hydraulic oil pump and the rotating speed of the motor respectively and a variable frequency speed regulator and a controller for controlling the motor; and the digital synchronous control mechanism comprises a digital synchronization valve, a digital synchronization controller and a displacement transducer for detecting the displacement of an output shaft of the hydrocylinder. The digital electric-hydraulic synchronous control system has the advantages of simple structure, simple and convenient use and operation, good use effect, energy conservation and no oil leakage, and can achieve the aims of stepless speed regulation and high-precision synchronization according to operating characteristic requirements of different types of controlled objects.

Description

technical field [0001] The invention belongs to the technical field of hydraulic synchronous control, and in particular relates to a digital electro-hydraulic synchronous control system which uses a valve-pump composite electro-hydraulic control system to control the synchronization of double cylinders (multi-cylinders) and the running direction, speed and position of each oil cylinder. Background technique [0002] High-load, high-power, and long-stroke systems usually require the use of multiple actuators to complete its functions and actions, such as the lifting of reservoir gates, the lifting of large containers, and the lifting of some large presses and testing machines, etc. In the above-mentioned large-load system, improving energy utilization efficiency and solving the synchronization problem of hydraulic systems of multiple actuators has become a key technology to ensure the economy, safety and reliability of engineering construction. [0003] Nowadays, there are th...

AI Technical Summary

Problems solved by technology

Because there is no throttling loss and overflow loss in the hydraulic system, the flow and pressure matching are realized, energy is effectively saved, oil heating is reduced, and the service life is prolonged, but the volume of the hydraulic cylinder with large capacity and long working stroke is synchronized Difficult to control and high cost

[0006] In the invention patent CN101033758 published on September 12, 2007, a synchronous control device for a hydraulic hoist that can automatically control the synchronous operation of two cylinders during the gate opening and closing process and has high synchronization accuracy is disclosed, which belongs to the throttling (valve-controlled ) control scheme, its biggest deficiency is that there is a large throttling loss and overflow loss, the system energy efficiency is low and it causes heat

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