The invention provides a crawler crane tower arm working condition efficient lifting arm system and method, the system comprises a main variable amplitude/tower arm variable amplitude switching valve, a pilot handle and a tower arm variable amplitude winding unit, and the pilot handle, the main variable amplitude/tower arm variable amplitude switching valve and the tower arm variable amplitude winding unit are sequentially connected through hydraulic pipelines; the device further comprises an electric proportional pressure regulating valve set and a shuttle valve unit. Wherein the electric proportional pressure regulating valve group is connected in parallel with the main variable amplitude/tower arm variable amplitude switching valve through a hydraulic pipeline, so that the pilot handle and the tower arm variable amplitude proportional valve can control the tower arm variable amplitude winding unit to perform tower arm variable amplitude winding operation; and the shuttle valve unit is arranged on a hydraulic pipeline for parallel connection. According to the invention, the amplitude variation of the main arm and the amplitude variation of the tower arm can be controlled while the arm is automatically lifted and lowered, and the risk of overturning of the crawler crane caused by improper manual operation of a driver in the arm lifting and lowering process is avoided.
本发明提出了一种履带起重机塔臂工况高效起落臂系统及方法,该系统包括主变幅/塔臂变幅切换阀、先导手柄和塔臂变幅卷扬单元,先导手柄、主变幅/塔臂变幅切换阀和塔臂变幅卷扬单元通过液压管路依次连接;还包括电比例调压阀组和梭阀单元;其中,电比例调压阀组与主变幅/塔臂变幅切换阀通过液压管路并联,以实现先导手柄和塔臂变幅比例阀均可控制塔臂变幅卷扬单元以进行塔臂变幅卷扬操作;梭阀单元设置在并联用的液压管路上。本发明可实现在自动起落臂的同时控制主臂变幅和塔臂变幅,同时避免了起落臂过程中因驾驶员手动操作不当造成的履带起重机倾覆的风险。
Crawler crane tower arm working condition efficient lifting arm system and method
履带起重机塔臂工况高效起落臂系统及方法
2023-04-11
Patent
Elektronische Ressource
Chinesisch
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