The invention discloses a hydraulic hybrid power system of a walking engineering machine, belongs to the technical field of mechanical hydraulic hybrid power, and solves the technical problems that an existing hybrid power system is low in walking braking energy recovery efficiency and poor in energy conservation and emission reduction effect. The system comprises an engine, a generator motor, an auxiliary power hydraulic pump motor and an electro-hydraulic conversion hydraulic pump motor. The engine is connected with the drive axle through the first coupler, the first clutch, the second coupler and the gearbox. The first coupler is connected with a generator motor through a second clutch and a third coupler; the second coupler is connected with an auxiliary power hydraulic pump motor through a third clutch; an auxiliary power hydraulic pump motor is connected with an electro-hydraulic conversion hydraulic pump motor in parallel, a low-pressure oil way of the auxiliary power hydraulic pump motor is connected with a hydraulic oil tank, a high-pressure oil way of the auxiliary power hydraulic pump motor is connected with a hydraulic energy accumulator through a one-way valve, and the one-way valve is connected with an electromagnetic reversing valve in parallel. And the electro-hydraulic conversion hydraulic pump motor is connected with the third coupler through a fourth clutch.
本发明公开了一种行走工程机械液压混合动力系统,属于机械液压混合动力技术领域,解决现有混合动力系统行走制动能量回收效率较低,节能减排效果较差的技术问题,本发明包括发动机、发电电动机、辅助动力液压泵马达、电液转换液压泵马达;发动机通过第一耦合器、第一离合器、第二耦合器、变速箱连接驱动桥;第一耦合器通过第二离合器、第三耦合器连接发电电动机;第二耦合器通过第三离合器连接辅助动力液压泵马达;辅助动力液压泵马达与电液转换液压泵马达并联,辅助动力液压泵马达的低压油路连接液压油箱,辅助动力液压泵马达高压油路通过单向阀连接液压蓄能器,单向阀并联有电磁换向阀;电液转换液压泵马达通过第四离合器连接第三耦合器。
Hydraulic hybrid power system of walking engineering machinery
一种行走工程机械液压混合动力系统
2024-03-15
Patent
Electronic Resource
Chinese
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