Motor bearing oil leakage causes and treatment

Motor bearing oil leakage causes and treatment

High-power motors in the course of frequent leakage significantly the performance of leakage bearing structure in the course of repair and maintenance, possible causes for the motor oil spills were analyzed and the following solutions.

1. Bearing large external pressure. Forced lubrication of bearings, lubricating oil itself has a certain pressure, the oil will produce bubbles when the axis operation to produce a certain pressure. Since the action of the fan motor will produce a certain negative pressure at runtime, thereby increasing the pressure inside and outside the oil, causing oil spills. In order to balance the pressure inside and outside the oil, the oil chamber and the outside world with a snorkel be pressure balanced, but in the course will have clogged the oil spill caused by ventricular pressure increases.

Solution: Check the balance regularly and promptly clean up loose tube tank vent.

2. The fuel pressure regulator is not in place leading to poor oil return. Oil pressure is too high or too low will cause poor oil return. Low oil pressure, cause the oil in the oil chamber extended period of time, during operation of the axis results in a temperature rise, which leads to high pressure mist appears; oil pressure is too high, will return to insufficient oil capacity, the oil chamber Excessive oil in the reservoir, the oil level is too high so as to increase the internal pressure.

Solution: Adjust forced lubrication pressure 0.1 ~ 0.8MPa, that the oil level in the oil chamber sight glass 1/2 - 1/3 position, and holding back oil unobstructed appropriate.

3. The return line back to the unreasonable design will lead to poor oil causing increased pressure oil chamber. There are impurities in the return line or the pipe cleaning without a net, and this will cause filter plugging, resulting in poor oil return.

Solution: The oil return line of the chamber outlet and the inlet should be in the same horizontal plane, the entire return line was 15 ° inclined to back to the tank, so naturally back to the oil return pipe. At the same time the filter should be cleaned regularly and the entire lubricating oil pipeline.

4. The Louvre and the shaft contact surface due to prolonged friction, wear serious, resulting in too large a gap between the shaft; the Louvre seal (Fig. 1) Fixed spring elastic coefficient changes so Louvre seal loose, causing the gap increases.

Solution: regular inspection and timely replacement.

5. gear and shaft seal oil contact surface wear so that the gap is too large; seal oil block in the back hole is too small or clogging impurities, can not meet the actual return oil.

Solution: Replace the seal oil block, for sealing oil block transformation. Seal oil change gear and shaft contact surface of the material, replace the wear-resistant materials; increase back to the hole (Figure 2) to meet the actual return oil needs (not too large).

6. Bearing installation process between the bearing housing cap tile tile covered under seal oil and seal stopper and seal oil chamber between the improper handling; long run lead to tighten loose bolts, sealants aging deterioration resulting Mifengbuyan.

Solution: Press the installation process, the contact surfaces of the use of reliable performance sealant and spread evenly, amount. Be sure to install the secondary back to the original sealant handle clean and then apply new sealant.

7. The oil change the oil in more than bubble and growing. Throughout the lubrication system, the foam occupy more space to run, causing hydraulic oil chamber increases, resulting in greater pressure lubricating oil from the shaft and the Louvre seal and seal oil block, which are in contact with the gap between the shaft sprang.

Solution: regular inspection analysis lubricants, such as oil in question must be promptly replaced.

Said motor bearing oil leakage cause analysis and solutions achieved certain results in practice, to ensure the safety and stable operation of the unit.