The invention discloses a steering hydraulic system of highway-railway dual-purpose engineering machinery. The steering hydraulic system comprises a load sensing steering gear, a steering priority controller, a left electromagnetic directional valve, a right electromagnetic directional valve, a left steering oil cylinder, a right steering oil cylinder, a descending oil cylinder, a working valve group and a proximity switch, an oil outlet of the load sensing steering gear is respectively connected with the left electromagnetic directional valve and the right electromagnetic directional valve, and the left electromagnetic directional valve is simultaneously connected with an oil inlet cavity of the left steering oil cylinder and an oil return cavity of the right steering oil cylinder. The right electromagnetic directional valve is simultaneously connected with an oil inlet cavity of the right steering oil cylinder and an oil return cavity of the left steering oil cylinder. According to the steering hydraulic system, the working states of the descending oil cylinder and the guide wheels are controlled through the load sensing steering gear and the working valve set, conversion between a highway mode and a railway mode is achieved, impact on the steering oil cylinder when the steering oil cylinder passes through a curve is avoided, the curve passing capacity of highway-railway machinery is improved, and meanwhile the service life of the hydraulic system is prolonged.
本发明公开了一种公铁两用工程机械的转向液压系统,包括负荷传感转向器、转向优先控制器、左电磁换向阀、右电磁换向阀、左转向油缸、右转向油缸、下降油缸、工作阀组以及接近开关;所述负荷传感转向器的出油口分别与所述左电磁换向阀和右电磁换向阀连接,所述左电磁换向阀同时与所述左转向油缸的进油腔和所述右转向油缸的回油腔连接,所述右电磁换向阀同时与所述右转向油缸的进油腔和所述左转向油缸的回油腔连接。本发明的转向液压系统通过负荷传感转向器和工作阀组控制下降油缸和导向轮的工作状态,实现了公路与铁路模式的转换,避免了转向油缸在通过曲线时所受到的冲击,提高公铁机械曲线通过能力的同时延长了液压系统的使用寿命。
Steering hydraulic system of highway-railway dual-purpose engineering machinery
一种公铁两用工程机械的转向液压系统
2021-09-03
Patent
Electronic Resource
Chinese
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