Control system and method for automatically adjusting moving speed of cutting arm of cantilever type heading machine

Abstract

The invention belongs to the technical field of engineering machinery, and discloses a control system and method for automatically adjusting the moving speed of a cutting arm of a cantilever type heading machine. The control system is provided with a ship-shaped double-position button for adjusting the moving speed gear of the cutting arm, a double-shaft operating rod arranged on a remote controller and used for adjusting the moving speed of the cutting arm, and a cutting arm moving speed gear selecting knob arranged on the remote controller; a signal vehicle-mounted mobile controller which isarranged in a control cabinet and is used for processing signals acquired by a current acquisition system with high performance and high protection level is connected with a hydraulic proportional electromagnetic valve which is arranged in a hydraulic valve bank and is driven by a current signal output by applying a PWMI technology through a mobile vehicle PWMI output module in a valve junction box; and four electro-hydraulic proportional pressure regulating valves of ascending-descending hydraulic cylinders and left-right rotary hydraulic cylinders in the hydraulic valve bank are actuating mechanisms for controlling the hydraulic cylinders to move up and down and left and right. According to the control system and method, the service life of equipment is prolonged, and the production efficiency is improved. The problem of frequent shutdown caused by heavy current overload is reduced, and the use is more humanized and intelligent.

Description

technical field [0001] The invention belongs to the technical field of construction machinery, and in particular relates to a control system and method for automatically adjusting the moving speed of a cutting arm of a cantilever roadheader. Background technique [0002] The cantilever roadheader is an important part of tunnel excavation engineering machinery, which can realize continuous cutting, loading and transportation. The rock composition inside the tunnel is not uniform, and the hardness of the different rock composition areas is not the same. When the cutting arm moves at a constant speed to cut rocks with high hardness, the load on the cutting part will increase, resulting in overloading of the cutting motor and drive cylinder, and damage to electrical components and mechanical structures. [0003] The roadheader is divided into cab control mode and remote control mode. In the cab control mode, because the operator is close to the cutting arm, the operator manuall...

AI Technical Summary

Problems solved by technology

When the cutting arm moves at a constant speed to cut rocks with high hardness, the load on the cutting part will increase, resulting in overloading of the cutting motor and drive cylinder, and damage to electrical components and mechanical structures

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