A lifting hydraulic system suitable for a mining dump truck comprises a first gear pump, a second gear pump, a variable pump, a steering oil cylinder, a flow amplification valve set, a steering valve set, a lifting oil cylinder, a lifting valve set and an oil tank. Oil inlets of the first gear pump, the second gear pump and the variable pump are connected with the oil tank, an oil outlet of the first gear pump is connected to a P2 port of the lifting valve set, an oil outlet of the second gear pump is connected to a P3 port of the lifting valve set, and an oil outlet of the variable pump is connected to an HP port of the flow amplification valve set through the conversion valve set. Two working oil ports of the flow amplification valve group are respectively connected to a rodless cavity and a rod cavity of the steering oil cylinder; a port EF1 of the flow amplification valve set is connected to a port EF2 of the steering valve set, a port E of the steering valve set is connected to a port P1 of the lifting valve set, and a converging electromagnetic valve is arranged in the steering valve set and used for controlling connection and disconnection between the port EF2 and the port E of the steering valve set. And two working oil ports of the lifting valve group are respectively connected to a rodless cavity and a rod cavity of the lifting oil cylinder. The invention further relates to a mining dump truck.
一种适用于矿用自卸车的举升液压系统,包括第一齿轮泵、第二齿轮泵、变量泵、转向油缸、流量放大阀组、转向阀组、举升油缸、举升阀组和油箱;第一齿轮泵、第二齿轮泵、变量泵的入油口与油箱连接,第一齿轮泵的出油口连接至举升阀组的P2口,第二齿轮泵的出油口连接至举升阀组的P3口,变量泵的出油口经转向阀组连接至流量放大阀组的HP口,流量放大阀组的两个工作油口分别连接至转向油缸的无杆腔和有杆腔;流量放大阀组的EF1口连接至转向阀组的EF2口,转向阀组的E口连接至举升阀组的P1口,转向阀组内设有合流电磁阀用于控制转向阀组的EF2口与E口之间的通断;举升阀组的两个工作油口分别连接至举升油缸的无杆腔和有杆腔。本发明还涉及一种矿用自卸车。
Lifting hydraulic system suitable for mining dump truck and mining dump truck
适用于矿用自卸车的举升液压系统及矿用自卸车
2025-01-28
Patent
Electronic Resource
Chinese
IPC: | F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B60P Fahrzeuge zum Transport von Lasten oder zum Befördern, Tragen oder Aufnehmen besonderer Lasten oder Gegenstände , VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS |
Mining dump truck cab, control box of mining dump truck cab and mining dump truck
European Patent Office | 2020
|Mining dump truck cab interior system and mining dump truck
European Patent Office | 2021
|