1. Explosion-proof shell
Shell design: The shell of Mining Electric Motor is usually made of steel plate or cast steel, with sufficient strength and thickness to withstand the pressure of internal explosion.
Explosion-proof mark: Each motor must be firmly nailed with the mark "Ex" and the coal mine safety mark "MA" in a conspicuous position on the base, and the handwriting should be clear.
2. Flameproof design
Flameproof power supply device: In addition to the battery box being a flameproof structure, the power supply device is also equipped with a catalyst to dehydrogenate the battery, ventilated with a pressure reducing device, and the box is equipped with technical measures such as monitoring the amount of hydrogen and automatic power-off alarm.
Flameproof motor: YB3 series high-voltage flameproof three-phase asynchronous motor for underground coal mines is a flameproof motor designed for underground coal mines. Its shell is a steel plate welded structure, made into a flameproof type according to the provisions of GB3836.2, and the explosion-proof mark is "Exdl".
3. Electrical clearance and creepage distance
Electrical clearance: The electrical clearance and creepage distance in the junction box must comply with the provisions of GB3836.3 to prevent arc or spark from causing explosion.
4. Grounding requirements
Grounding screw: The motor base must be equipped with a grounding screw, and a non-wearable grounding mark must be set nearby.
5. Cooling and lubrication system
Cooling system: In order to prevent the motor from damaging the electrical components due to excessive temperature and causing the motor to short-circuit and explode, Mining Electric Motor is usually equipped with a cooling system.
Lubrication system: When the motor is running normally, the corresponding lubricating oil can be added to the bearing sleeve according to the current speed of the motor to increase the lubrication effect of the bearing sleeve.
6. Monitoring and protection devices
Monitoring device: Mining Electric Motor is usually equipped with a variety of monitoring devices, such as battery over-discharge indication device, hydrogen automatic detection alarm power-off device, leakage protection device, etc.
Protection device: The electric locomotive should be equipped with overload protection, overspeed protection, odometer, leakage protection and other devices or comprehensive protection devices with equivalent functions.
7. Anti-static measures
Anti-static design: The surface and internal components of Mining Electric Motor are usually made of anti-static materials to reduce static electricity accumulation.
