Digital electric-hydraulic synchronous control system

A technology of synchronous control and synchronous controller, which is applied in the direction of fluid pressure actuation system components, fluid pressure actuation devices, mechanical equipment, etc., and can solve the problems of difficult synchronous control of hydraulic cylinder volume, large throttling loss and overflow loss, and system Low energy efficiency and other issues, to achieve the effect of improving safety and reliability, response speed, volume control, energy saving, and high energy efficiency

Inactive Publication Date: 2009-11-04
薛国光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Effect test

Embodiment 1

[0056] like figure 1 As shown, the present invention includes a hydraulic actuator, a digital synchronous control mechanism that directly performs synchronous control on the hydraulic actuator, and an electro-hydraulic power source that provides power oil for the hydraulic actuator and the digital synchronous control mechanism, And an electro-hydraulic control system for comprehensively controlling the electro-hydraulic power source and the digital synchronous control mechanism.

[0057] The hydraulic actuators are two or four hydraulic cylinders. In this embodiment, the hydraulic actuators are two and specifically hydraulic cylinder one 1-1 and hydraulic cylinder two 1-2.

[0058] The electro-hydraulic power source includes an oil storage tank, two double-acting hydraulic oil pumps 12 connected to the oil storage tank through hydraulic pipelines, and an electric motor 15 for driving the double-acting hydraulic oil pump 12 . Two hydraulic pipelines between the oil storage tan...

Embodiment 2

[0074] The difference between this embodiment and Embodiment 1 is that: the spool 20 of the digital synchronous valve, that is, the spool valve, is a single boss structure, and a boss capable of laterally blocking the valve cavity is arranged in the middle, and passes through the valve core. The left and right outer ends of the boss respectively adjust the openings of the two diverter ports 22, and the boss is set facing the oil inlet 21, and the oil inlet 21 and the two diverter ports 22 form two about The boss is a symmetrical confluence-distribution oil passage. In this embodiment, the structures, control methods and functions of other parts are the same as those in Embodiment 1.

Embodiment 3

[0076]The difference between this embodiment and Embodiment 1 is that: the spool 20 of the digital synchronous valve, that is, the spool valve, has a three-boss structure, on which three bosses capable of laterally blocking the valve cavity are arranged and three From left to right, the bosses are left boss, middle boss and right boss. The middle boss is set facing the oil inlet 21 and the openings of the two diverter ports 22 are adjusted through the inner ends of the left boss and the right boss respectively. The oil inlet 21 and the two diverter ports 22 are respectively Between the left boss and the middle boss, and between the middle boss and the right boss, two left and right symmetrical converging and diverging oil passages are formed. In this embodiment, the structures, control methods and functions of other parts are the same as those in Embodiment 1.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B21/08
Inventor 薛国光
Owner 薛国光
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