The invention relates to a hoisting mechanism hydraulic system, a hoisting system and engineering machinery, and the hoisting mechanism hydraulic system comprises a hydraulic pump (1); the reversing valve (2) is arranged on an oil supply path of the hydraulic pump (1); the hydraulic motor (3) is arranged on a working oil way of the reversing valve (2) and is configured to provide driving force for a hoisting mechanism, and the hydraulic motor (3) is provided with a lifting cavity (31) and a descending cavity (32); the balance valve (4) is arranged on a working oil way between the reversing valve (2) and the lifting cavity (31); the starting control valve (5) is internally provided with a control oil way (51), and the control oil way (51) is configured to provide hydraulic oil with first preset pressure for a first oil way (41) between the lifting cavity (31) and the balance valve (4) in the process that the hoisting mechanism executes the falling action; and an accumulator (6) communicating with the first oil passage (41) through an oil passage inside the starting control valve (5).
本公开涉及一种卷扬机构液压系统、卷扬系统及工程机械,其中,卷扬机构液压系统包括:液压泵(1);换向阀(2),设在液压泵(1)的供油油路上;液压马达(3),设在换向阀(2)的工作油路上,被配置为向卷扬机构提供驱动力,液压马达(3)具有起升腔(31)和下降腔(32);平衡阀(4),设在换向阀(2)与起升腔(31)之间的工作油路上;启动控制阀(5),其内设有控制油路(51),控制油路(51)被配置为在卷扬机构执行下落动作的过程中,向起升腔(31)和平衡阀(4)之间的第一油路(41)提供第一预设压力的液压油;和蓄能器(6),通过启动控制阀(5)内部的油路与第一油路(41)连通。
Hoisting mechanism hydraulic system, hoisting system and engineering machinery
卷扬机构液压系统、卷扬系统及工程机械
2023-04-11
Patent
Electronic Resource
Chinese
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