Motor bearings causes of fever and make fat and fat exchange experience

Motor bearings causes of fever and make fat and fat exchange experience

Motor bearing temperature has mainly the following reasons: 1, grease grade inappropriate. 2, poor quality or deterioration of grease. 3, bearing indoor grease too much or too little. 4, inner grease debris. 5, the bearing outer or inner ring run. 7, bearing the wrong type or poor quality. 8, coupling misalignment. 9, the belt pulled too tightly. 10, motor vibration is too large.

Motor grease type

name

  Owned motor series

Blew 7014-1 grease (-40 ~ + 200 ℃)

High temperature applications

LGHP2

SKF grease

No small motor bearing grease 2

General Motor

HTHS

2-pole motors

7025 blew high and low temperature grease (-30 ~ + 300 ℃)

High temperature applications

SHC220 Mobil

Lithium complex grease, low loss

Low temperature grease / Kunlun on the 2nd (-60 ~ + 120 ℃)

Occasional low

Most motor bearing temperature is too high because of too much or too little greasing. For motor bearing greasing summarize a few points of experience:

1, the motor bearing grease should not be mixed. Oil mix could produce oil hardening or lumps, causing the motor bearings fever. The motor bearing grease at the factory, the grease is substantially ordinary lithium grease, and called for new motor bearings were put into use before oil change, fill oil treatment.

2. When replacing the grease, fat Chen should remove and wash bearings and bearing cap, and then add a new grease, the added amount of grease to the bearing chamber space to add 1 / 2-2 / 3 is appropriate (2-pole motor oil capacity of the cavity 1/2, 4-pole, 6-pole, 8-pole motor bearing not fat content of the cavity 2/3). The grease too much or too little, will make the bearing fever, caused by the decomposition of grease deterioration.

3, the use of the motor should be regularly refuel. Time required on the motor housing plate press require regular refueling, no time required by the motor specification requirements for regular charge on the nameplate. Motor bearings are generally required to run up the oil from 2000 to 3000 hours, and fill the oil is 20 to 50 grams. Equipment high-load operation, refueling frequency can be appropriately increased equipment a long time, the amount of fuel so do not need much, just a little supplement can.

4, motor bearings fill oil requirements at runtime, requires first refueling nozzle wipe clean up the oil can not be a plus too much, otherwise bearings easy to heat, more harm than good when you fill the oil. You can add a little first, whether the change was observed after the bearing temperature, sound, etc. together, bearing sound, vibration should be change after refueling, to observe.

5, the high-voltage motors and some high-power low-voltage motors, the bearing cap has a drain hole underneath for discharging excess oil in the bearing and after use emulsified oil after deterioration, periodic discharge principle. Fill motor oil is recommended before and after the meeting should be to clean up the oil inside the oil drain hole.

6, use of the environment is dusty or humid, high temperature environment, the grease should be changed frequently. First bearing should be replaced with kerosene, gasoline clean grease before injection. After bearing lubricant injection, the rotor should be easily pulled by hand.

7, the motor bearings are lifetime limit. In the normal complement of oil, oil change, the motor bearings fever, abnormal sound, etc., should consider whether it is to the life of the motor bearings. Motor recommend running a three-year replacement bearings for high load on the motor or dust easily into the bearing of the motor this time should be shortened to one year a proposal to change the bearing.

8, no filling hole for motor (typically low-power motors) used bearing closed bearing, which need not be replaced during the life of the bearing grease, bearing replacement can be carried out in accordance with the motor bearing replacement time.

Motor bearings up the oil, the oil change should be based on the use of the site to the correct treatment, it is not static, to do ground inspection, identify problems in time to make the motor is always kept in good working condition.