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Electro-hydraulic system for recycling and releasing potential energy of engineering machinery

A technology of gravitational potential energy and engineering machinery, which is applied to fluid pressure actuating system components, mechanical equipment, fluid pressure actuating devices, etc., can solve the problems of low power density, inability to provide energy instantaneously, and high cost of super capacitors or batteries. The effect of improving efficiency, low price, and reducing the link of energy conversion

Active Publication Date: 2013-01-23
ZHEJIANG UNIV
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Problems solved by technology

However, the cost of supercapacitors or batteries used in this system is very high, and the power density is very low, which cannot provide high energy instantaneously, and is not suitable for application in the field of construction machinery with large load fluctuations and frequent movements. widely used

Method used

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  • Electro-hydraulic system for recycling and releasing potential energy of engineering machinery

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Embodiment approach

[0031] In order to improve the safety of the electro-hydraulic system of the present invention and reduce energy loss, as a preferred embodiment of the present invention, the reversing mechanism may further include a hydraulically controlled one-way valve 4 and a second hydraulically controlled two-position three-way valve 5 . Such as figure 1 As shown, port B of the hydraulically controlled one-way valve 4, port P of the second hydraulically controlled two-position three-way valve 5, and the rodless chamber of the lifting hydraulic cylinder 8 communicate with each other, and port A of the hydraulically controlled one-way valve 4 is connected to the multi-way The B port of the valve 3 is connected, the A port of the second hydraulically controlled two-position three-way valve 5 is connected with the spring cavity of the hydraulic control check valve 4, and the B port of the second hydraulically controlled two-position three-way valve 5 is connected with the oil tank 27.

[003...

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Abstract

The invention discloses an electro-hydraulic system for recycling and releasing the potential energy of an engineering machinery. The electro-hydraulic system comprises a control system, a power source, a performing mechanism, a switching mechanism and an energy recycling releasing mechanism, wherein the control system comprises a controller, a first pressure sensor, a second pressure sensor, a third pressure sensor and a fourth pressure sensor; the power source comprises an engine, a main variable pump and an oil tank; the performing mechanism comprises a lifting hydraulic cylinder; the switching mechanism comprises a multiway valve and a pilot control handle; and the energy recycling releasing mechanism comprises an energy accumulator, a first liquid control two-position three-way valve, an electromagnetic two-position three-way valve and a variable pump-motor. With the adoption of the electro-hydraulic system for recycling and releasing the potential energy of the engineering machinery, when the working condition of the engineering machinery is down, a lot of gravitational potential energies can be recycled and is used for driving the main pump, so that the consumption power of the engine is lowered, the energy waste is reduced, and the work efficiency of the engineering machinery is improved.

Description

technical field [0001] The invention relates to an energy recovery system for construction machinery, in particular to an electro-hydraulic system for recovery and release of gravitational potential energy of construction machinery. Background technique [0002] At present, energy saving and environmental protection have become common topics all over the world. Construction machinery is one of the main areas of energy consumption. Therefore, energy conservation and environmental protection are particularly important in the application of construction machinery. The most important working conditions of excavators, loaders, crawler cranes and other equipment widely used in construction machinery are lifting and slewing. However, in most of the existing construction machinery, there is no energy recovery system. A large amount of potential energy and kinetic energy are lost by overflow and throttling during the running process, which not only causes a huge waste of energy, but ...

Claims

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Application Information

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IPC IPC(8): F15B21/14
Inventor 魏建华杜晓东方锦辉胡波陈莹
Owner ZHEJIANG UNIV
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