Hydraulic system of excavator

Abstract

The invention provides a hydraulic system of an excavator, belonging to the technical field of engineering machinery and solving the technical problems of high energy consumption, low use stability and the like of the traditional hydraulic system of the excavator. The hydraulic system of the excavator comprises a main oil way subsystem and a pilot oil way subsystem, wherein the main oil way subsystem comprises a main pump and a main oil way communicated with the main pump; the pilot oil way subsystem comprises a pilot valve assembly and an electromagnetic valve assembly communicated with the pilot valve assembly; and an oil inlet of the electromagnetic valve assembly is communicated with the main oil way through an oil supply pipeline. The invention has the advantages of low cost, high stability, low energy consumption, energy saving and emission reduction and the like.

Description

technical field

[0001] The invention belongs to the technical field of engineering machinery, and relates to an excavator, in particular to an excavator hydraulic system. Background technique

[0002] An excavator is an earth-moving machine that uses a bucket to excavate materials above or below the bearing surface, and loads them into transport vehicles or unloads them to the stockyard. The excavated materials are mainly soil, coal, silt, and pre-loosened soil and rock. Judging from the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators are one of the most important construction machinery in engineering construction.

[0003] As the power system of the excavator, the hydraulic system plays a vital role in the overall performance of the excavator. like figure 1 As shown, at present, the hydraulic system of the excavator is composed of the engine, the main pump 2, the pilot pump 1, the control valve and t...

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