Summary: Edge of mill drive system all adopt gear transmission device. The cost of the drive gear pair accounts for about 10% ~ 15% of the total mill cost. Good lubrication of the large and small gears is the key to extending gear life...

Edge of mill drive system all adopt gear transmission device. The cost of the drive gear pair accounts for about 10% ~ 15% of the total mill cost. Good lubrication of the large and small gears is the key to extending gear life, ensuring a long grinding cycle, and maintaining safe and stable operation.Do a good job in mill drive gear pair lubrication, to prolong the service life, improve the utilization efficiency of mill equipment, ensure the equipment performance in good condition and reduce the maintenance cost is of great significance.

On the market at present, the ball mill drive gear pair lubrication method for small tank of oil lubrication, in using process, find that the lubrication mode has the following defects:

  • 1) Will not be able to drive gear on the effective width adequate lubrication, the lubrication effect is poorer.
  • 2) The general design of the ball mill large gear service life is 100000 h, according to the rate of 50% utilization of coal grinding equipment calculation, a big gear service life is 23 years. The large gear of a ball mill generally has a service life of 10 years, and wear on the drive gear is a very serious problem.
  • 3) There is a serious oil spill in field, and waste a large number of lubricating oil, so the environmental condition is poor.
  • 4) Each ball mill needs to be greased at least twice per shift, and the labor intensity is high.

According to the current situation of lubrication for the drive gear pair of the pulverized coal mill, combined with the wear condition of the transmission gears, selecting an appropriate lubrication method and suitable lubricating materials for the large and small drive gears is the key to achieving good lubrication.

Our experts are studying an automatic oil lubrication system. The automatic lubricating system has the following advantages:

  • 1) Due to the use of spray technology, the high-viscosity lubricant is sprayed onto the gear surface under pressure, forming a tough oil film. This ensures good lubrication of the gears and significantly prolongs their service life.
  • 2) Lubrication machine electric cabinet is the core of a programmable logic controller (PLC), it is responsible for all the control, automatic and manual work mode to the mill of the need to start the serial number to set up in advance. Has the advantage of high reliability and strong control ability; with simple and clear external connections, easy to master; the display uses an industrial-grade backlit LCD TD200, which can display Chinese with clear instructions. This is the optimal solution for automatic lubrication machine control.
  • 3) Centralized lubrication device has the mill and the interlocking function and lubrication failure alarm function.

Applying this research result to the ball mill has led to significant improvements in its performance.

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