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Digital hydraulic control valve and control method thereof

A technology of hydraulic control valves and hydraulic valves, which is applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problems of low cost performance and high failure rate of analog hydraulic valves, and achieve low cost, easy fault diagnosis, Effects with a high degree of freedom of control

Inactive Publication Date: 2015-09-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high failure rate and low cost performance of analog hydraulic valves in the prior art, and to design a digital hydraulic control valve and its control method, which can accurately control the flow and pressure in the passage, and realize closed loop Control, with high reliability, flexible and diverse control methods, strong fault tolerance and low cost

Method used

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  • Digital hydraulic control valve and control method thereof
  • Digital hydraulic control valve and control method thereof

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the digital hydraulic valve of the present invention includes 5 groups of flow control units with the same structure, and each group of flow control units is formed by parallel connection of 8 groups of electromagnetic switch valves with orifices. The throttle area of ​​the orifice is encoded by the Fibonacci sequence. By controlling the combined state of the electromagnets of each electromagnetic switching valve, the control of output flow (size and direction) and pressure can be realized, and the resolution and maximum flow of the valve can be determined according to actual needs.

[0020] The function and connection relationship of each component in the digital hydraulic valve are as follows:

[0021] Similar to the interface of traditional analog hydraulic valve, digital hydraulic valve also has oil supply port P, oil return po...

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Abstract

The invention relates to a digital hydraulic control valve, and belongs to the technical field of hydraulic driving and controlling. The digital hydraulic control valve comprises five groups of flow control units which are same in structure. Each flow control unit is composed of connecting of eight sets of electro-magnetic switch valves with throttling openings in parallel. The drift diameters of the electro-magnetic switch valves are totally same. The throttling areas of the throttling openings are coded by adopting the Fibonacci sequence. By controlling the combining state of electro-magnets of the electro-magnetic switch valves, the control over the output flow (the size and the direction) and the pressure can be achieved. The resolution ratio and the maximum flow of the valves can be confirmed according to the actual needs. The digital hydraulic control valve is formed by the regular electro-magnetic switch valves and the throttling openings, the structure is simple, the cost is low, the advantages of the switch valves are continued, the reliability is high, the anti-pollution capacity is strong, the all-digital control is achieved, multiple control modes and working modes are achieved, the control freedom degree is high, the flexibility is high, the fault diagnosis is easy to carry out, and the great fault-tolerant capability is achieved.

Description

technical field [0001] The invention relates to a digital hydraulic control valve, which can adjust the flow and pressure in the channel according to specific coding rules, has multiple control modes and working modes, and belongs to the technical field of hydraulic drive and control. Background technique [0002] In prior art servo valves or proportional valves, the drive control method is usually analog control. The analog hydraulic valve has a complex structure, is very sensitive to oil pollution, and has a high failure rate. In recent years, although a variety of new digital valve technologies based on stepping motors or servo motors have emerged, they are still essentially spool valve-controlled analog components, which cannot fundamentally overcome the disadvantages of traditional analog hydraulic valves. The present invention designs a digital hydraulic control valve. Compared with the traditional analog hydraulic valve, the digital hydraulic control valve is compose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B13/044
CPCF15B13/02F15B13/044
Inventor 汪首坤吴建王军政赵江波沈伟马立玲李金仓
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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