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Frequency converter volume variable speed closed hydraulic control systems

A technology of hydraulic control system and volumetric speed regulation, which is applied in the direction of fluid pressure actuators, servo motors, mechanical equipment, etc. It can solve the problems of low efficiency and high energy consumption of hydraulic systems, and achieve small impact, energy saving, and smooth switching. to the effect

Inactive Publication Date: 2003-09-03
ZHEJIANG UNIV
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Problems solved by technology

[0002] The traditional valve-controlled throttling speed regulation system is relatively mature in technology and widely used in the current hydraulic control system. It mainly uses throttling speed regulation technology to control the running speed and direction of the load. In this way, a large part of the energy of the system is consumed at the throttle valve, so this type of hydraulic system consumes a lot of energy and has low efficiency

Method used

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  • Frequency converter volume variable speed closed hydraulic control systems
  • Frequency converter volume variable speed closed hydraulic control systems
  • Frequency converter volume variable speed closed hydraulic control systems

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Embodiment Construction

[0017] As shown in Figure 1, the hydraulic control unit is composed of a main circuit 1 and an oil supply circuit 2. The relationship between the components in the main circuit 1 is as follows: the variable frequency motor 3 is connected to the two-way hydraulic pump 5 through the coupling 4 . The two-way hydraulic pump 5 is connected to the left cavity 20 and the right cavity 21 of the double-rod symmetrical hydraulic cylinder 19 through pipelines 6 and 7 respectively, and the piston rod 22 of the double-rod symmetrical hydraulic cylinder 19 is in contact with the load. The safety valve 14 is connected to the shuttle valve 17 through the pipeline 11 , the shuttle valve 17 is connected to the pipelines 6 and 7 through the pipelines 16 and 18 respectively, and the safety valve 14 is connected to the oil tank 12 through the pipeline 13 . The two oil ports of the combined combined combined valve 8 are connected to the pipelines 6 and 7 respectively through the pipelines 9 and 10 ...

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Abstract

A closed hydraulic control system with frequency-varying volumetric speed regulation for high-power and high-speed fields is composed of primary hydraulic loop and oil-supplementing loop for said primary hydraulic loop. A frequency-varying technique is used to control the rotation speed of three-phase AC asynchronous motor and in-turn the output flow of hydraulic pump or hydraulic motor. Its advantages are small volume of oil in hydraulic loop, and high energy-saving effect.

Description

technical field [0001] The invention relates to a closed hydraulic control system with variable frequency volume and speed regulation. Background technique [0002] The traditional valve-controlled throttling speed regulation system is relatively mature in technology and widely used in the current hydraulic control system. It mainly uses throttling speed regulation technology to control the running speed and direction of the load. In this way, a large part of the energy of the system is consumed at the throttle valve, so this type of hydraulic system consumes a lot of energy and has low efficiency. [0003] The hydraulic volume speed regulation method adjusts the input flow of the hydraulic pump according to the working needs of the load without overflow loss, thus reflecting a higher energy-saving effect than the valve-controlled hydraulic control system. The frequency conversion volumetric speed regulation technology adjusts the size of the pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/032
Inventor 徐兵杨华勇欧阳小平
Owner ZHEJIANG UNIV
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