The invention discloses a full-hydraulic steering system of a wide-body dump truck, and belongs to the technical field of off-highway dump trucks. The hydraulic control system is characterized in that the priority valve is used as a hydraulic control reversing valve, a CF oil port of the priority valve is connected with an oil inlet of the steering gear, an EF port is connected with an energy accumulator, an LS port is connected with an LS port of the full-hydraulic steering gear, a P port is connected with an oil outlet of the gear pump, and a T port returns to an oil tank; the flow direction of hydraulic oil is controlled through LS oil, when steering is conducted, a P port is communicated with a CF port, a certain amount of oil enters a steering gear and then is connected into a booster cylinder through the steering gear, steering is achieved, when the steering gear does not conduct steering, the P port is communicated with an EF port, the hydraulic oil enters an energy accumulator, and when the pressure of the energy accumulator reaches the set pressure of a priority valve, the pressure of the priority valve is relieved, and the hydraulic oil flows back to an oil tank through a T port; the service life of the gear pump is guaranteed through oil way pressure relief of the priority valve, the emergency steering function can be achieved, and the cost of the system is reduced.
本发明公开了一种宽体自卸车的全液压转向系统,属于非公路自卸车技术领域;其特点是,优先阀当作液控换向阀使用,优先阀的CF油口与转向器进油口连接,EF口与蓄能器连接,LS口与全液压转向器的LS口连接,P口与齿轮泵的出油口连接,T口回流油箱;通过LS油控制液压油流向,转向时,P口与CF口连通,一定数量的油进入转向器,再通过转向器接入助力缸,实现转向,转向器不转向时,P口与EF口连通,液压油进入蓄能器,蓄能器压力达到优先阀设定压力时,优先阀卸压,液压油通过T口回流油箱;通过优先阀的油路卸压,保证了齿轮泵的使用寿命,既可以实现应急转向的功能,又降低了系统的成本。
Full-hydraulic steering system of wide-body dumper
一种宽体自卸车的全液压转向系统
2022-11-18
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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