Method for controlling rising velocity of movable arm of excavator, control system and excavator

Abstract

The invention discloses a method for controlling the rising velocity of a movable arm of an excavator, a control system for realizing the method and an excavator containing the control system. The control system comprises an engine, a first hydraulic pump, a second hydraulic pump, a movable arm oil cylinder, a main control valve, an operating handle, a controller and a plurality of detecting devices. The movable arm is provided with a limit position detecting zone. The controller judges whether the movable arm rises to the limit position detecting zone according to signals fed back from the detecting devices, calculates and outputs a control signal to the first hydraulic pump, adjusts the output power of the first hydraulic pump in time, and reduces the stretching velocity of the movable arm oil cylinder until the action terminal velocity is zero so as to effectively realize the buffer function, increase the service life of the movable arm oil cylinder and enhance the reliability of the complete machine. When the excavator works in a worksite with complex working condition, the accident rate can be effectively reduced, and the efficiency of construction operation is increased; andmoreover, the control system has simple structure, and the control method is convenient to realize.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for the lifting speed of the arm of the excavator. The invention also relates to a control system for realizing the method and an excavator including the control system. Background technique [0002] At present, excavators are widely used in earthwork construction projects. During the working process of the excavator, the excavator arm is driven by manipulating the operating handle. Skilled operators can precisely operate the operating handle and operate the excavator arm smoothly, making it possible to To reduce the impact on the actuator, on the contrary, an unskilled operator who has less experience in operation cannot delicately operate the operating handle, but tends to operate the joystick suddenly, so that the boom and its upper part will be damaged due to the sudden operation. The working device causes impact due to inertia, thereby reducing work efficiency. In respon...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and a control system for controlling the lifting speed of the excavator arm to solve the problem caused by the rapid rise of the excavator arm to the limit position. The whole excavator vibrates back and forth in the horizontal direction, so as to improve the working efficiency of the excavator and improve the safety of production

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