Small motor bearings are special rolling bearings specially used in motors or motors. The rolling bearing used in the motor is a supporting point shaft part, which can correctly guide the rotation of the shaft, and can also withstand the rotation of the shaft. The definition of the bearing is very broad. The production line often encounters oil leakage from high-power motors, which is likely to be due to oil leakage from the electric spindle bearings. In the repair and maintenance link, small motor bearings can be directly repaired. Usually there are the following situations: 1. The pressure difference between the inside and outside of the small motor bearing is large. For forced lubricated piston pins, the grease itself has a certain working pressure, and the oil will also generate bubbles when the shaft is running, thereby generating a certain working pressure. The motor will also generate a certain negative pressure due to the fan effect during operation, thereby expanding the pressure difference between the inside and outside of the oil chamber, resulting in oil leakage. In order to balance the pressure difference inside and outside the oil chamber, the oil chamber and the outside are equipped with ventilation pipes to balance the pressure difference, but it will also be blocked during use, which will increase the gas pressure in the oil chamber and cause oil leakage. Solution: Regularly check whether the balance pipe is loose and deal with the oil tank ventilation pipe in time. 2. Inadequate implementation of steam pressure adjustment leads to obstruction of oil return. If the oil pressure is too high or too low, the oil return will be blocked. If the oil pressure is too low, the oil stays in the oil chamber for too long, which will cause the temperature to rise during the operation of the shaft, and even welding smoke will appear, resulting in too high working pressure; if the oil pressure is too high, the oil return capacity will be insufficient, causing the oil chamber to There is too much oil stored in the middle, the oil volume is too high and the gas pressure is enlarged. Solution: adjust the forced lubrication working pressure at 0.1 ~ 0.8MPa, so that the oil level in the oil chamber is at the position of 1/2 ~ 1/3 of the rearview mirror, and maintain the return Smooth oil is the most suitable. 3. The unreasonable design of the oil return pipeline will also lead to the obstruction of the oil return and the expansion of the gas pressure in the oil chamber. The oil return pipeline contains debris or the pipeline is not clean, etc., which will cause the filter device to be blocked and the oil return to be blocked. Solution: The inlet and outlet of the oil chamber of the oil return line should be at the same level as the oil inlet hole, and the entire oil return line is inclined at 15° to the oil return tank, so that the oil return line can return oil naturally. At the same time, the filter and the entire lubricating oil line should be cleaned regularly. The above methods can effectively solve the oil leakage situation of common small motor bearings.
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