A boom luffing hydraulic system and a crane
A hydraulic system and boom technology, applied in the field of construction machinery, can solve the problems of violent shaking of the boom, affecting the control stability and fretting.
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[0020] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0021] Combine below figure 1 , the preferred embodiment of the present invention will be further described in detail. The boom luffing hydraulic system in this preferred embodiment, one is to solve the problem that the boom often shakes violently during the lowering process of the boom, which seriously affects the control stability and micro Mobility issue.
[0022] Such as figure 1 As shown, the jib luffing hydraulic system specifically includes: the main pump 5, the main valve 4, the luffing cylinder 1, the fuel tank, the first oil circuit, the second oil circuit, the first oil circuit and the first cavity of the luffing cylinder 1 The oil port is connected, the second oil circuit is connec...
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