Fuel oil system of excavator

Abstract

The invention discloses a fuel oil system of an excavator. The fuel oil system comprises a fuel oil tank, an oil-water separator, an electronic pump, a fuel oil fine filter, an engine and a fuel oil conveying pipeline. The fuel oil conveying pipeline comprises a first oil conveying pipeline, a second oil conveying pipeline, a third oil conveying pipeline, a fourth oil conveying pipeline, a first oil return pipeline and a second oil return pipeline. The fuel oil tank is connected with the oil-water separator through the first oil conveying pipeline. The oil-water separator is connected with the electronic pump through the second oil conveying pipeline. The electronic pump is connected with the fuel oil fine filter through the third oil conveying pipeline. The fuel oil fine filter is connected with the engine through the fourth fuel oil conveying pipeline. The engine is connected with the fuel oil fine filter through the first oil return pipeline. The fuel oil fine filter is connected with the fuel oil tank through the second oil return pipeline. By the adoption of the fuel oil system, the fuel oil conveying pipeline can be greatly shortened, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of excavators, in particular to an excavator fuel system. Background technique [0002] Mini excavators are widely used in various construction sites because of their small size, flexibility, convenient transportation, and convenient construction in narrow areas. The engine is one of the important parts of the excavator, and the fuel supply system is an important part of the engine. Its function is to provide fuel for the engine to work, so that the whole machine has excellent power performance, economic performance, emission and operational reliability. [0003] The existing mini-excavators are affected by their own small internal space, and most of them have the following problems: the length of the pipeline on the fuel oil road is long, the direction is complicated, the resistance of the fuel is too large, the fuel supply of the engine is not smooth, and it is easy to cause flameout; The oil inlet resist...

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Problems solved by technology

[0003] The existing mini-excavators are affected by their own small internal space, and most of them have the following problems: the length of the pipeline on the fuel oil road is long, the direction is complicated, the resistance of the fuel is too large, the fuel supply of the engine is not smooth, and it is easy to cause flameout; The oil inlet resistance of the oil circuit is large, the working intensity of the electronic pump is high, and the service life is short; the energy loss of the fuel oil circuit is large, the engine fuel consumption is high, the economy is poor, the exhaust gas emission is large, and the environmental protection performance is poor

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