The invention relates to the technical field of engineering machinery, in particular to a hydraulic system and engineering machinery. The hydraulic system comprises a first pumping device, a second pumping device, a two-way power output device, an emergency reversing valve bank and a two-way hydraulic lock assembly. The two-way power output device comprises a first oil port and a second oil port.In a normal state, when the emergency reversing valve bank is switched to a first position, the first pumping device communicates with the first oil port and the second oil port. In an emergency state, when the emergency reversing valve bank is switched to a second position, inlets of two one-way valves of the two-way hydraulic lock assembly communicate with the first oil port and the second oil port correspondingly, outlets of the two one-way valves of the two-way hydraulic lock assembly communicate with an oil tank, and the second pumping device communicates with the first oil port or the second oil port. The engineering machinery comprises the hydraulic system. According to the hydraulic system and the engineering machinery, under the condition that a power source fails, an emergency power source is started, it is guaranteed that a driven piece continuously acts, and the safety and the working efficiency of engineering construction are improved.
本发明涉及工程机械技术领域,尤其涉及一种液压系统和工程机械。该液压系统包括第一泵送装置、第二泵送装置、双向动力输出装置、应急换向阀组和双向液压锁组件;双向动力输出装置包括第一油口和第二油口;在正常状态下,当应急换向阀组切换至第一位,第一泵送装置连通于第一油口与第二油口;在应急状态下,当应急换向阀组切换至第二位,双向液压锁组件的两个单向阀的入口分别与第一油口和第二油口相连通,双向液压锁组件的两个单向阀的出口连通油箱,第二泵送装置连通于第一油口或第二油口。该工程机械包括该液压系统。该液压系统和工程机械,在动力源失效的情况下,启动应急动力源,保证被驱动件持续动作,提高工程施工的安全性和工作效率。
Hydraulic system and engineering machinery
液压系统和工程机械
2020-06-16
Patent
Electronic Resource
Chinese
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