The invention relates to a steering system and aims to solve the problems that a steering emergency pump on an existing loader is low in utilization rate and braking heating of a brake is large, provides a steering hydraulic system and a loading machine. The steering hydraulic system comprises a steering control device, a steering pump, an emergency pump, a PTO assembly for driving the emergency pump and a control valve, wherein a pump opening of the emergency pump is connected with an oil opening P of the control valve, and an oil opening O of the control valve and a pump opening output oil way of the steering pump are both connected with the steering control device. An oil port T of the control valve is communicated with the hydraulic oil tank; and when the braking and/or steering pump cannot supply oil normally, the P oil port and the O oil port of the control valve are communicated, and when the braking action does not exist and the steering pump is normal, the P oil port and the T oil port of the control valve are communicated. During braking, the emergency pump and the steering system are used for auxiliary braking.
本发明涉及转向系统,为解决现有装载机上转向应急泵利用率低而制动器制动发热大的问题;提供一种转向液压系统和装载机,其中转向液压系统包括转向控制装置、转向泵和应急泵,驱动应急泵的PTO组件、控制阀,应急泵的泵口与控制阀的P油口连接,控制阀的O油口与转向泵的泵口输出油路均与转向控制装置连接,控制阀的T油口与液压油箱连通;当制动和/或转向泵不能正常供油时控制阀的P油口与O油口导通,没有制动动作且转向泵正常时控制阀的P油口与T油口导通。本发明在进行制动时,利用应急泵和转向系统,进行辅助制动。
Steering hydraulic system and loading machine
转向液压系统和装载机
2021-06-04
Patent
Electronic Resource
Chinese
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