The invention belongs to the hydraulic technical field of engineering machinery, and discloses a synchronous jacking hydraulic system and a tower crane. The synchronous jacking hydraulic system comprises a first oil cylinder, a second oil cylinder, an oil drainage oil way, a first pilot driving oil way and a second pilot driving oil way, a hydraulic control proportional valve is arranged in the oil drainage oil way, and a first oil inlet oil way is connected between a first oil inlet of the hydraulic control proportional valve and a high-oil-pressure oil way in a working oil way of the first oil cylinder. A second oil inlet oil way is connected between the second oil inlet and a high oil pressure oil way in the second oil cylinder working oil way. The first pilot driving oil way is connected with the first oil cylinder working oil way and the first control end of the hydraulic control proportional valve and used for driving the first valve element end of the proportional valve element to move towards the second valve element end. The second pilot driving oil way is connected with the second oil cylinder working oil way and the second control end and drives the second valve element end to move towards the first valve element end. Redundant oil in the oil cylinder working oil way with larger flow can be returned through the oil drainage oil way, so that synchronous jacking of the two oil cylinders is ensured.
本发明属于工程机械液压技术领域,公开了一种同步顶升液压系统和塔机。同步顶升液压系统包括第一、第二油缸、泄油油路及第一、第二先导驱动油路,泄油油路中设有液控比例阀,其第一进油口与第一油缸工作油路中的高油压油路之间连接有第一进油油路,第二进油口与第二油缸工作油路中的高油压油路之间连接有第二进油油路;第一先导驱动油路连接第一油缸工作油路与液控比例阀的第一控制端并用于驱动比例阀芯的第一阀芯端朝向第二阀芯端移动;第二先导驱动油路连接第二油缸工作油路与第二控制端并驱动第二阀芯端朝向第一阀芯端移动。本发明可将流量更大的一路油缸工作油路中的多余油液通过泄油油路回油,从而确保两个油缸同步顶升。
Synchronous jacking hydraulic system and tower crane
同步顶升液压系统和塔机
2022-11-29
Patent
Electronic Resource
Chinese
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