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Hydraulic system of loader-digger, control method of hydraulic system of loader-digger and loader-digger

A backhoe loader and hydraulic system technology, applied to earth movers/shovels, construction, etc., can solve problems such as high fuel consumption, difference in engine power utilization, and low power utilization at the excavation end, so as to improve power utilization efficiency, reducing fuel consumption and noise

Inactive Publication Date: 2020-08-18
SANY HEAVY MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, when the backhoe loader is working, the speed, pressure, and flow of the working pump are constant, and the power is also constant. However, when the loading end and the excavation end of the backhoe loader work separately, there is a huge difference in the power utilization of the engine. Among them, the excavation Lowest end power utilization, resulting in extremely high fuel consumption

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  • Hydraulic system of loader-digger, control method of hydraulic system of loader-digger and loader-digger
  • Hydraulic system of loader-digger, control method of hydraulic system of loader-digger and loader-digger

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...

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Abstract

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.

Description

technical field [0001] The invention relates to the technical field of backhoe loaders, in particular to a hydraulic system of the backhoe loader, a control method and the backhoe loader. Background technique [0002] At present, when the backhoe loader is working, the speed, pressure, and flow of the working pump are constant, and the power is also constant. However, when the loading end and the excavation end of the backhoe loader work separately, there is a huge difference in the power utilization of the engine. Among them, the excavation The terminal power utilization is the lowest, resulting in extremely high fuel consumption. Contents of the invention [0003] The object of the present invention is to provide a hydraulic system of a backhoe loader, a control method and the backhoe loader, so as to improve the utilization rate of engine power to a certain extent. [0004] The invention provides a hydraulic system of a backhoe loader, which includes an engine, a hydra...

Claims

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Application Information

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IPC IPC(8): E02F9/20E02F9/22
CPCE02F9/20E02F9/22E02F9/2246E02F9/2267
Inventor 蓝强崔鹏飞周聪
Owner SANY HEAVY MACHINERY
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