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
CN1439814AInactive Publication Date: 2003-09-03ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2003-09-03
Estimated Expiration
Not applicable · inactive patent

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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.
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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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