The rotary hydraulic system comprises a reversing valve and a rotary motor, a first working oil port A1 of the reversing valve is connected with a port A of the rotary motor, and a second working oil port B1 of the reversing valve is connected with a port B. The rotary hydraulic system is characterized in that a first back pressure valve is arranged between the working oil port A1 of the reversing valve and the port A of the rotary motor; a second back pressure valve is arranged between a second working oil port B1 of the reversing valve and a port B of the rotary motor; the first back pressure valve and the second back pressure valve are formed by connecting two one-way valves in parallel and then connecting the two one-way valves in parallel with the throttling valve, and the two one-way valves are arranged in opposite directions. According to the technical scheme, the heavy-load working condition and the no-load working condition can be considered, the rotation buffering distance and time are increased, and the rotation buffering effect is improved.
本发明公开了一种回转液压系统及起重机,包括换向阀和回转马达,所述换向阀的第一工作油口A1连接回转马达的A口,换向阀的第二工作油口B1连接回转马达的B口,其特征在于:所述换向阀的工作油口A1与回转马达的A口之间设置第一背压阀,换向阀的第二工作油口B1与回转马达的B口之间设置第二背压阀;所述第一背压阀和第二背压阀为两个单向阀并联之后再与节流阀并联连接,其中,两个单向阀设置方向相反。本发明的技术方案能够兼顾重载工况和空载工况,增大回转缓冲的距离和时间,改善回转缓冲效果。
Rotary hydraulic system and crane
一种回转液压系统及起重机
2024-03-01
Patent
Elektronische Ressource
Chinesisch