Introduction to Driving System and Lubrication of Ball Mill

Descripción

Driving type of the ball mill mainly use edge transmission, synchronous motor drive way ball mill has low speed, heavy load, starting torque and other characteristics. When the mill normal operate, its load is usually stable. So ball mill general use the no-load starting synchronous motor, and then use pneumatic clutch connection mill load, not only reduces the synchronous machine power, but also achieve energy-saving purposes.Sand making equipments mainly include impact crushre, jaw crusher, hammer crusher, cone crushre,roll crusher and vibrating feeder,etc.

Ball mill control principle is as follows:

Synchronous motors:

Mill motor power equipment itself mainly consider the weight of ball, ball load,feeding amount and water volume and other factors, its support equipment also include high-voltage control cabinet, excitation cabinet, start counter. these devices mainly complete the synchronous machine starts, shutdown and over-current, over-voltage, grounding, phase imbalance and under-excited synchronous machine such protection. At the same time by the PLC, also detection and protect a synchronous machine stator and a rotor bearing temperature.

Pneumatic clutch:

Ball mill motor is generally load start, and then by the pneumatic clutch contact to ball mill’s cylinder load, the motor’s starting does not represent that mill had been running, only pneumatic clutch is closed, after about 8 seconds, the ball mill drive through friction plates axis hold, so that the cylinder speed is normal, then the ball started successfully.

Lubrication system:

Mill ends of the spindle load to bear a large load, you need good lubrication, reliable, self-aligning and flexible, perfect protection requirements. Lubrication systems generally use a qualified high (low) pressure lubrication oil station, according to the working principle of ball mill main bearing different lubrication in different ways. Hydrodynamic bearing lubrication works can be started hydrodynamic lubrication hydrostatic way. Before starting the ball first by high-pressure pump to the bottom of the hollow shaft and bearing some of the oil is pumped between the shaft and the tile is formed between the layer of film, reducing the start-up resistance. After running a few minutes in a ball mill, high pressure pump to stop working. At this time the rotation of the ball mill lubricants rely on the formation of hydrodynamic lubrication. After a period of time in the start and stop before the high pressure system, with a low pressure system during normal operation. The working principle is the hydrostatic bearing lubrication at startup has been using high-pressure system around the spindle to hold up the ball mill to form a continuous film, and there is another way high pressure system as part of the thrust positioning operation, the low-pressure system has been running.

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