Mining machinery and equipment is a kind of special large-scale machinery and equipment in coal mining, transmission and transportation, including mining machine, conveyor, roadway excavation equipment, underground auxiliary transportation, vehicle equipment, mine winch, ventilation and dust removal equipment, coal washing equipment, crane, special vehicles, etc.

The mechanical equipment in mine production has the following characteristics:

1. The working environment is bad, and the equipment is surrounded by dust, water vapor and harmful gas all the time;

2. The working conditions are harsh. Most of the mechanical equipment works under the working conditions of high speed, heavy load, vibration, impact, friction and medium corrosion;

3. The operation time is long, most of the machinery and equipment work continuously day and night for many years;

4. Poor lubrication conditions. Due to the harsh environment, harsh working conditions and short downtime, mechanical parts can not get good lubrication and maintenance.

Therefore, the annual economic loss is amazing. Only by choosing the right bearing, regular maintenance, timely maintenance, improving the quality of maintenance, and ensuring that all production equipment runs in a good state, can we reduce the wear and tear of coal mine machinery, extend its service life, and realize the effective measures of high yield and high efficiency of coal production and safe production, and the mining operators can ensure the safety of production High productivity makes the equipment reach the expected service life.