The invention discloses a hydraulic system for locking the neutral position of an electric control steering shaft. A P1 port of a hydraulic control selector valve is connected with a first steering oil pump, a P2 port of the hydraulic control selector valve is connected with a plunger variable pump, and a B oil port of the hydraulic control selector valve is connected with an energy accumulator; the energy accumulator is connected with the electric control axle locking hydraulic circuit and provides high-pressure oil to achieve middle-position locking of the electric control axle middle-position locking oil cylinder. An oil port 1 of the double-loop steering gear is connected with a port A of the hydraulic control selector valve; the second steering oil pump is connected with an oil port 1 of the other loop of the double-loop steering gear, and an oil port 2 of the double-loop steering gear is used for oil return. A left steering oil cylinder and a right steering oil cylinder of the mechanical steering shaft are connected with a high-pressure oil port of the double-loop steering gear, and hydraulic power-assisted steering of the steering gear is achieved. The emergency steering function of the mechanical steering shaft is preferentially guaranteed, energy consumption is reduced, and the number of oil pumps is reduced.
本发明公开了一种用于电控转向轴中位锁定的液压系统,所述液控选择阀的P1口连接有转向油泵一、P2口连接有柱塞变量泵,所述液控选择阀的B油口连接有蓄能器;所述蓄能器与电控车轴锁止液压回路连接,提供高压油实现电控车轴中位锁止油缸的中位锁定;双回路转向器的1油口与液控选择阀的A口连接;所述转向油泵二与双回路转向器的另外一个回路的1油口连接,双回路转向器的2油口均用于回油;所述机械转向轴的转向左右油缸与双回路转向器的高压油口连接,实现转向器液压助力转向,本发明通过液控选择阀,实现将机械转向轴的应急转向油源与电控转向车轴的中位锁定油源共用油泵装置,优先保证机械转向轴的应急转向功能,减少能量消耗,节约油泵数量。
Hydraulic system for locking neutral position of electric control steering shaft and crane
一种用于电控转向轴中位锁定的液压系统及起重机
2023-03-14
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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