Excavator movable arm energy recovery system based on pressure variable energy accumulator
A technology of energy recovery and accumulators, which is applied to mechanically driven excavators/dredgers, earth movers/shovels, construction, etc., can solve the problem of inability to directly release the boom cylinder, energy cannot be recovered, and energy recovery Problems such as low utilization rate, to achieve the effect of reducing requirements, reducing energy loss, and reducing heat generation
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[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to be more readily understood by those skilled in the art, so that the scope of the invention is more clearly defined.
[0020] See figure 1 A excavator-based electric arm energy recovery system based on a pressure variable excavator, mainly including excavating motor arms control moieties and energy recovery portions. The boom control unit is mainly made of a tank 1, a relief valve 2, a hydraulic variable pump 3, an engine 4, a three-way four-way reversing valve 5, which can adjust the flow valve 6, a hydraulic one-way valve 7, a first pressure sensor 8, and The arm cylinder 9, the controller 23, the energy recovery portion is mainly mainly by the switching valve 11, the piston accumulator 12, the pneumatic servo valve 13, the second pressure sensor 14, the third pressure sensor 15, the fourth pressure sensor 16, first The pneumatic one-way valve...
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