Preloading method and device of excavator and excavator

Abstract

The embodiment of the invention provides a preloading system and method of an excavator and the excavator, and belongs to the technical field of engineering machinery. The preloading system of the excavator comprises a main pump connected with an engine and a negative feedback regulator arranged on the main pump, the negative feedback regulator is used for controlling the displacement of the main pump, and the system further comprises a controller used for determining the working state of the excavator when it is detected that the altitude is larger than the preset height; and when the working state of the excavator is no action, the main pump and a negative feedback path of the negative feedback regulator are controlled to be disconnected, and preset pressure is provided for the negative feedback regulator so as to increase the load rate of the engine. The dynamic characteristic, the action speed and the operation efficiency of the engine in the plateau area are improved.

Description

Technical field[0001]The present invention relates to the field of construction machinery, and in particular to a preloading method, apparatus, and excavator of an excavator.Background technique[0002]Under the harsh environmental conditions in the plateau area, the research data indicates that the altitude is 1000 meters, the air density will decrease by 8-10%, under 4,000 meters above sea level, the air density is only 65% ​​of the plain area, resulting in the plateau area Excavators generally have a series of highlands adaptability issues such as holy cars, black smoke and insufficient dynamic.[0003]In order to make the excavator work normally in the plateau area, the existing excavator takes a way to reduce the absorption power of the hydraulic system in the plateau area. Although this method solves the phenomenon of the plateau vessel flameout, the dynamic is seriously reduced, resulting in action Slow speed, low work efficiency.Inventive content[0004]It is an object of the embo...

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Problems solved by technology

[0002] Under the harsh environmental conditions in plateau areas, research data show that the air density will decrease by 8-10% for every 1,000 meters above sea level. Excavators generally have a series of high-altitude adaptability problems such as car suffocation, black smoke, and insufficient power

[0003] In order to make the excavator work normally in the plateau area, the existing excavator in the plateau area adopts the method of reducing the absorbed power of the hydraulic system. Although this method solves the phenomenon of vehicle stalling and stalling in the plateau area, the power performance is seriously lower than that in the plain area, resulting in movement. Slow speed and low work efficiency

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