The invention discloses a crane luffing energy recovery-recycle method and system, and a crane. The crane luffing energy recovery-recycle method comprises that a luffing oil cylinder converts gravitational potential energy generated during the luffing-down process of a crane arm of the crane into hydraulic energy; a first hydraulic power unit converts the hydraulic energy generated by the luffing oil cylinder into mechanical energy of a main transmission shaft, and the first hydraulic power unit is communicated with a main pump coaxially; the main transmission shaft drives a second hydraulic power unit to rotate through a transfer case, the transfer case is communicated with an output shaft of an engine, and the engine is connected in parallel with the second hydraulic power unit through the transfer case; the second hydraulic power unit supplements liquid to an energy accumulator, and mechanical energy of the second hydraulic power unit is converted into hydraulic energy, and the hydraulic energy is stored. During the luffing-down process, the gravitational potential energy of the sling load and the crane arm is recycled, energy saving and emission reduction are achieved, and heat generated by the system is reduced.
Crane luffing energy recovery-recycle method and system, and crane
2015-12-16
Patent
Electronic Resource
English
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