Research And Design Of Shearer Leakage Protector

The coal mining machine is one of the key equipment for coal mining equipment of coal production enterprises.It is called "big three machine" with hydraulic support and scraper conveyor.The "big three machine" is the core equipment for coal mining,and the subject of reliability and safety of coal mining electrical control system is an important part of the research of some institutions today.At present,China's coal production equipment has developed rapidly.As the technical level of production equipment in the coal industry is lagging behind the development of other industries,the technological content of its equipment is relatively low,and the stability and safety of equipment operation need to be improved.Leakage protection is one of the basic protection functions of mining electrical equipment.It is an important measure to ensure the safe power supply of underground electrical equipment and prevent personal electric shock.Increasing the leakage protection function in the shearer electrical system and improving the leakage protection performance can greatly improve the safety of the shearer and the operator.Leakage fault is a common type of fault in the power system of the shearer electrical system.If the leakage protection measures are improper,it will cause a major safety accident in the coal mine.The coal mining machine is the main equipment for coal mine production.Whether the coal mining machine is safe and reliable is crucial to the personal safety of the underground workers and the property safety of the coal enterprises.This paper introduces the basic principle of leakage protection in coal mining electrical control system.In view of the problems existing in the design and detection methods of leakage protection in this system,the improved design of leakage protection device is proposed.On the basis of the scheme,the shearer-loaded leakage protection and the no-load leakage protector of the coal mining machine are upgraded and improved respectively.The feasibility of the scheme is verified by further simulation analysis,which can improve the reliability of the leakage protection of the coal mining electrical control system.Sex and safety.According to the application characteristics of three-stage longitudinal power supply,the principle of leakage protection is determined according to the application characteristics of the three-stage longitudinal power supply.The combination of the fluctuation of the load in the system and the high harmonic content in the power supply circuit,leakage The protector has systematically designed the hardware and software parts,and tested the function of the device through the test platform provided by the shearer manufacturer.It verified the reliability of the function of the leakage protector and can be applied to existing ones.Coal mining electrical control system.