The invention discloses a highway-railway dual-purpose vehicle and a highway-railway dual-purpose vehicle hydraulic control system and method, and relates to the technical field of hydraulic control. The problem that a hydraulic system cannot ensure stable pressure between a guide wheel and a rail is solved. The system comprises an energy storage assembly, an oil cylinder, a first reversing valve and a proportional pressure reducing valve. The proportional pressure reducing valve comprises a pressure reducing valve body and a proportional overflow valve. The pressure reducing valve body is provided with an oil inlet, an oil outlet and a control port. The energy storage assembly is communicated with the oil inlet, the first reversing valve is communicated with the oil outlet, and the proportional overflow valve is communicated with the control port. According to the highway-railway dual-purpose vehicle and the highway-railway dual-purpose vehicle hydraulic control system and method, the proportional pressure reducing valve is arranged between the energy storage assembly and the first reversing valve, and when the pressure of the oil outlet of the pressure reducing valve body is low, the energy storage assembly can supplement oil to the oil inlet of the pressure reducing valve body so as to increase the pressure of the oil outlet of the pressure reducing valve body. And when the pressure of the oil outlet of the pressure reducing valve body is high, the proportional overflow valve overflows oil through the control port of the pressure reducing valve body so as to reduce the pressure of the oil outlet of the pressure reducing valve body, and therefore the oil pressure of the oil cylinder is kept in dynamic balance all the time.
本发明公开了一种公铁两用车、公铁两用车液压控制系统及方法,涉及液压控制技术领域,解决了液压系统无法保证导向轮与轨道之间压力稳定的问题。该系统包括蓄能组件、油缸、第一换向阀和比例减压阀,比例减压阀包括减压阀与比例溢流阀,减压阀设置有进油口、出油口和控制口,蓄能组件连通进油口,第一换向阀连通出油口,比例溢流阀连通控制口。本发明通过在蓄能组件与第一换向阀之间设置比例减压阀,当减压阀出油口的压力较低时,蓄能组件对减压阀的进油口补充油液,以提高减压阀出油口的压力;当减压阀出油口的压力较高时,比例溢流阀通过减压阀的控制口溢出油液,以降低减压阀出油口的压力,从而使油缸的油液压力始终保持动态的平衡。
Highway-railway dual-purpose vehicle and highway-railway dual-purpose vehicle hydraulic control system and method
一种公铁两用车、公铁两用车液压控制系统及方法
2021-04-20
Patent
Elektronische Ressource
Chinesisch
Europäisches Patentamt | 2021
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