Hydraulic system and control method thereof

Abstract

The invention provides a hydraulic system and a control method thereof, and relates to the hydraulic technical field. The hydraulic system includes a rotary pilot oil circuit, a lifting pilot oil circuit and a control mechanism. The control mechanism includes a controller, a rotary pressure sensor, a lifting pressure sensor and a pressure regulating component; the rotary pressure sensor is arranged on the rotary pilot oil circuit and is used for detecting a pilot pressure signal of the rotary pilot oil circuit and sending the pilot pressure signal to the controller; the lifting pressure sensoris arranged on the lifting pilot oil circuit and used for detecting a pilot pressure signal of the lifting pilot oil circuit and sending the pilot pressure signal to the controller; the pressure regulating component is arranged on the lifting pilot oil circuit and / or the rotary pilot oil circuit; the pressure regulating component is connected to the controller, and when the rotary pressure sensor and the lifting pressure sensor detect the pilot pressure signal at the same time, the controller controls the pressure regulating component to adjust the pressure of the pilot oil circuit which isin communication with the pressure regulating component. The difference between the rotating speed of a rotary motor and the lifting speed of a movable arm can be adjusted to meet the requirements ofvarious working conditions.

Description

technical field

[0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic system and a hydraulic system control method. 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.

[0003] During the working process of the excavator, the compound action of lifting the boom and turning is often used. In this compound action, the flow of the hydraulic system tends to go to the swing motor with a lighter load, resulting in the swing speed of the swing motor being greater than the lifting of the boom. speed.

[0004] During the construction process, different working conditions have different demands on the difference between the swing speed of the swing motor and the lifting speed of the boom. However, the excavator in the prior art cannot adjust the difference between the slewing ...

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