The invention discloses an amplitude-changing leveling hydraulic control system for a boom type aerial work platform. The system comprises an amplitude-changing oil cylinder and a leveling oil cylinder, and further comprises a hydraulic oil tank as well as a load-sensitive pump, an emergency power unit and a rotary table control valve which are connected with the hydraulic oil tank respectively, a gravity descending valve is arranged on the amplitude-changing oil cylinder, a leveling balance valve is arranged on the leveling oil cylinder, and the leveling balance valve is connected with a platform control valve; and the power end of the load-sensitive pump is connected with a power device. The system has the advantages that when an arm support raises in an amplitude-changing mode, the stability and accuracy of amplitude changing and leveling are ensured; when the arm support falls in an amplitude-changing mode, the stability of variable changing and leveling is guaranteed, meanwhile, the problems that shaking is is prone to occur, the stability is poor and the energy consumption is large in an existing scheme are solved; the system is efficient and capable of saving energy in whole, good in amplitude-changing stability, high in leveling precision, particularly simple in emergency falling control and high in reliability; and when an electric control system and a power system of a complete machine fail, safe arm falling can still be realized on the premise of ensuring the leveling performance of the work platform.
本发明公开了一种臂架式高空作业平台变幅调平液控系统。它包括变幅油缸和调平油缸,还包括液压油箱以及分别与液压油箱连接的负载敏感泵、应急动力单元和转台控制阀,变幅油缸上安装有重力下降阀,调平油缸上安装有调平平衡阀,调平平衡阀连接有平台控制阀;负载敏感泵的动力端连接有动力装置。优点是:臂架变幅起时,保证了变幅和调平的稳定性和精确性。臂架变幅落时,在保证变幅调平的稳定性的同时,解决了现有方案中易抖动,平稳性差,能耗大的问题,其整体高效节能,变幅稳定性好,调平精度高,尤其应急下降控制简单,可靠性高,在整机电控系统以及动力系统失效时,仍可在保证工作平台调平性能的前提下安全落臂。
Amplitude-changing leveling hydraulic control system for boom type aerial work platform
一种臂架式高空作业平台变幅调平液控系统
2021-11-02
Patent
Elektronische Ressource
Chinesisch
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |
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