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Hydraulic system of loader-digger, control method of hydraulic system of loader-digger and loader-digger
The invention relates to the technical field of loader-diggers, in particular to a hydraulic system of a loader-digger, a control method of the hydraulic system of the loader-digger and the loader-digger. The hydraulic system of the loader-digger comprises an engine, a hydraulic pump, a loading end main valve and a digging end main valve; the engine is connected with the loading end main valve andthe digging end main valve through the hydraulic pump, and the output power of the engine and the output torque of the hydraulic pump can be adjusted so that the output power of the hydraulic pump can be matched with the output power of the engine. According to the hydraulic system, the control method and the loader-digger, when a digging device works, the rotating speed of the engine is reducedto reduce the output power of the engine, and the output torque of the hydraulic pump is increased to keep the output power of the hydraulic pump unchanged, so that the output power of the hydraulic pump is matched with the output power of the engine, the power utilization rate of the engine is increased, and the oil consumption and noise of the engine are remarkably reduced; and when a loading device works, the rotating speed of the engine is increased to enable the engine to perform full-power output, and the output torque of the hydraulic pump is reduced, so that the output power of the reactance plunger pump is kept unchanged.
本发明涉及挖掘装载机技术领域，尤其是涉及一种挖掘装载机的液压系统、控制方法及挖掘装载机。挖掘装载机的液压系统包括发动机、液压泵、装载端主阀和挖掘端主阀；发动机通过液压泵与装载端主阀和挖掘端主阀相连接，发动机的输出功率和液压泵的输出扭矩可调，以使液压泵的输出功率与发动机的输出功率相匹配。当挖掘装置作业时，降低发动机的转速，以降低其输出功率；提高液压泵的输出扭矩以维持液其输出功率不变，从而使液压泵的输出功率与发动机的输出功率相匹配，提高发动机的功率利用率，并显著降低发动机的油耗和噪音。当装载装置作业时，提高发动机的转速，使其全功率输出；降低液压泵的输出扭矩，从而维持电抗柱塞泵的输出功率不变。
Hydraulic system of loader-digger, control method of hydraulic system of loader-digger and loader-digger
The invention relates to the technical field of loader-diggers, in particular to a hydraulic system of a loader-digger, a control method of the hydraulic system of the loader-digger and the loader-digger. The hydraulic system of the loader-digger comprises an engine, a hydraulic pump, a loading end main valve and a digging end main valve; the engine is connected with the loading end main valve andthe digging end main valve through the hydraulic pump, and the output power of the engine and the output torque of the hydraulic pump can be adjusted so that the output power of the hydraulic pump can be matched with the output power of the engine. According to the hydraulic system, the control method and the loader-digger, when a digging device works, the rotating speed of the engine is reducedto reduce the output power of the engine, and the output torque of the hydraulic pump is increased to keep the output power of the hydraulic pump unchanged, so that the output power of the hydraulic pump is matched with the output power of the engine, the power utilization rate of the engine is increased, and the oil consumption and noise of the engine are remarkably reduced; and when a loading device works, the rotating speed of the engine is increased to enable the engine to perform full-power output, and the output torque of the hydraulic pump is reduced, so that the output power of the reactance plunger pump is kept unchanged.
本发明涉及挖掘装载机技术领域，尤其是涉及一种挖掘装载机的液压系统、控制方法及挖掘装载机。挖掘装载机的液压系统包括发动机、液压泵、装载端主阀和挖掘端主阀；发动机通过液压泵与装载端主阀和挖掘端主阀相连接，发动机的输出功率和液压泵的输出扭矩可调，以使液压泵的输出功率与发动机的输出功率相匹配。当挖掘装置作业时，降低发动机的转速，以降低其输出功率；提高液压泵的输出扭矩以维持液其输出功率不变，从而使液压泵的输出功率与发动机的输出功率相匹配，提高发动机的功率利用率，并显著降低发动机的油耗和噪音。当装载装置作业时，提高发动机的转速，使其全功率输出；降低液压泵的输出扭矩，从而维持电抗柱塞泵的输出功率不变。
Hydraulic system of loader-digger, control method of hydraulic system of loader-digger and loader-digger
挖掘装载机的液压系统、控制方法及挖掘装载机
LAN QIANG (author) / CUI PENGFEI (author) / ZHOU CONG (author)
2020-08-18
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
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