The invention relates to the technical field of engineering machinery, and discloses a feedback current eliminating system and an overhead working truck. The elimination system includes: a hydraulic pump; the diverter valve is used for diverting hydraulic oil provided by the hydraulic pump to the motors; a balance valve; a switching device; the pressure detection device is used for detecting the pressure of the two working ports of the diverter valve; the control device is used for executing the following steps: determining the high and low conditions of the pressure of the two working ports under a normal working condition according to the walking direction of the overhead working truck, and the normal working condition is a working condition in which no feedback current is generated; and under the condition that the pressure of the two working ports is not matched with the pressure of the two working ports under the normal working condition, the switch device is controlled to act to introduce the balance valve into a loop between the hydraulic pump and the diverter valve so as to balance the oil inlet quantity and the oil outlet quantity of the diverter valve. Stable control over the rotating speed of the motor can be achieved, and generation of feedback current is avoided from the source.
本发明涉及工程机械技术领域,公开一种回馈电流的消除系统与高空作业车。所述消除系统包括:液压泵;分流阀,用于将液压泵提供的液压油分流至多个马达;平衡阀;开关装置;压力检测装置,用于检测分流阀的两个工作口的压力;以及控制装置,用于执行:根据高空作业车的行走方向,确定两个工作口的压力在正常工况下的高低情况,其中正常工况为不产生回馈电流的工况;以及在两个工作口的压力的高低情况与两个工作口的压力在正常工况下的高低情况不匹配的情况下,控制开关装置动作以将平衡阀引入液压泵与分流阀之间的回路上,以平衡分流阀的进油量与出油量。本发明可实现马达转速的稳定控制,从根源上避免回馈电流的产生。
System for eliminating feedback current and overhead working truck
回馈电流的消除系统与高空作业车
2024-07-09
Patent
Electronic Resource
Chinese
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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