The invention provides a lifting system of a crane, and belongs to the technical field of hydraulic pressure. The lifting system comprises an execution oil cylinder, a pump set, a lifting module and acompensation module, wherein the lifting module comprises a three-position four-way reversing valve, the pump set communicates with the execution oil cylinder through the three-position four-way reversing valve, the compensation module comprises a two-position three-way reversing valve, a first overflow valve, an energy accumulator, a first one-way valve, a hydraulic control one-way valve, a cartridge valve and a second overflow valve, a second oil port of the first overflow valve communicates with a control oil port of the first overflow valve and an oil port of the energy accumulator, the first one-way valve communicates between the energy accumulator and a rod cavity of the execution oil cylinder, an oil outlet and a control oil port of the hydraulic control one-way valve communicate with the rod cavity of the execution oil cylinder and a working oil port of the two-position three-way reversing valve respectively, a first oil port and a control oil port of the cartridge valve communicate with an oil inlet of the hydraulic control one-way valve respectively, and a second oil port of the cartridge valve communicates with a rodless cavity of the execution oil cylinder and the oiltank. According to the lifting system, the wave compensation effect can be achieved.
本公开提供了一种起重机的升降系统,属于液压技术领域。该升降系统包括执行油缸、泵组、升降模组和补偿模组;升降模组包括三位四通换向阀,泵组通过三位四通换向阀与执行油缸连通;补偿模组包括二位三通换向阀、第一溢流阀、蓄能器、第一单向阀、液控单向阀、插装阀和第二溢流阀,第一溢流阀的第二油口与自身的控制油口和蓄能器的油口连通,第一单向阀连通在蓄能器与执行油缸的有杆腔之间,液控单向阀的出油口和控制油口分别与执行油缸的有杆腔和二位三通换向阀的工作油口连通,插装阀的第一油口和自身的控制油口分别与液控单向阀的进油口连通,插装阀的第二油口分别与执行油缸的无杆腔和油箱连通。本公开能够具有波浪补偿的作用。
Lifting system of crane
起重机的升降系统
26.02.2021
Patent
Elektronische Ressource
Chinesisch
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