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Overgreasing can lead to high operating temperatures, collapsed seals and in the case of greased electric motors, energy loss and failures. The best ways to avoid these problems are to establish a maintenance program, use calculations to determine the correct lubricant amount and frequency of relubrication, and utilize feedback instruments.
- Too Much or Too Little Lubricant: Which Is the Bigger Problem?
If you want to minimize the risk of over- and...
- Electric Motor Bearing Greasing and Lubrication
Most electric motors are designed with grease-lubricated,...
- Too Much or Too Little Lubricant: Which Is the Bigger Problem?
If you want to minimize the risk of over- and under-lubricating your bearings, look no further than the UE Systems OnTrak SmartLube. This automatic single-point lubricator uses ultrasound technology to measure friction and dispense the correct amount of grease.
Most electric motors are designed with grease-lubricated, antifriction, rolling-element bearings. Grease is the lifeblood of these bearings because it provides an oil film that prevents the harsh metal-to-metal contact between the rotating element and races.
18 oct. 2017 · When filled completely with grease, an electric motor bearing will generate excessive heat due to churning, resulting in energy loss as well as an accelerated rate of oil bleed and hardening of the grease thickener.
Proper lubrication is important to avoid premature bearing failure and in some cases to maximize bearing life beyond the calculated expectation. Bearing faults are the most frequent failures in electric motors (41%), according to a motor reliability study for large motors above 200 HP [1].
Determining the correct amount of grease for an electric motor bearing is one of the most important steps in initial greasing and in regreasing of the bearings. An insufficient amount of grease could lead to bearing failure due to lack of lubrication. On the other hand, over-lubrication can also lead to bearing
Over lubrication can cause the grease or oil to get into the windings. This will cause the insulation to deteriorate around the winding, resulting in arcing and shorting inside the motor to the case. Over lubricaiton will also cause excessive heat and wear on the rotor and stator.
