Machine carried electric traction coal-mining machine with short main body

Abstract

The invention relates to a short body machine mounted electrical haulage coal cutter with advantages as safety and convenient maintenance. The technical project is: on the coal cutter body, a machine mounted transformer is arranged, one end of the transformer is connected to a power supply cable, the other end is connected to a low-voltage electric speed regulation device, and on the short body of the coal cutter, a medium voltage electric speed regulation device with power supply cable can also be mounted, suitable for different short body electrical haulage coal cutter.

Description

Technical field: [0001] The invention relates to a coal shearer, in particular to a short body electric traction coal shearer. Background technique: [0002] Short fuselage electric traction coal shearer, the fuselage is relatively short, the explosion-proof box on the machine is very small, the existing structure of the transformer and the electrical speed regulating device are placed in the roadway of the coal mining face, the output of the electric speed regulating device has been modulated The current is transmitted to the traction motor installed on the fuselage by a special towing cable, and information such as control, protection, and display is also transmitted by the cable. The low-speed performance of electric traction with this structure is poor, the control signal is susceptible to external interference, and the information transmission is complicated. , the cable failure will easily cause damage to the electrical speed control device; in view of this, the indust...

AI Technical Summary

Problems solved by technology

[0002] Short fuselage electric traction coal shearer, the fuselage is relatively short, the explosion-proof box on the machine is very small, the existing structure of the transformer and the electrical speed regulating device are placed in the roadway of the coal mining face, the output of the electric speed regulating device has been modulated The current is transmitted to the traction motor installed on the fuselage by a special towing cable, and information such as control, protection, and display is also transmitted by the cable. The low-speed performance of electric traction with this structure is poor, the control signal is susceptible to external interference, and the information transmission is complicated. , the cable failure will easily cause damage to the electrical speed control device; in view of this, the industry has proposed an improvement plan for a short-body quasi-airborne electric traction coal shearer (such as Chinese patent ZL02265918.8), and its transformer is placed on the coal mining work In the face roadway, the electric speed regulating device is installed on the coal mining machine body, and the special low-voltage dragging cable connects the transformer and the electric speed regulating device to improve its low-speed performance. The load structure still has the following problems:

[0003] 1. A special leakage protection and locking device shall be installed between the transformer and the cable in the roadway;

[0004] 2. If the shearer is also equipped with leakage protection and locking devices, the two sets of leakage protection and locking devices in the roadway and onboard are likely to interfere with each other, causing malfunctions;

[0005] 3. If there is no leakage protection and locking device on the shearer, when the contactor in front of the frequency converter is not closed, the leakage protection and locking device in the roadway cannot realize leakage locking for the frequency converter, traction motor and its connecting cables. There are security risks;

[0006] 4. The transformer, leakage protection and locking device in the roadway are bulky and inconvenient to use

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