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Common causes and exclusion methods of skeleton oil sealing parts

The skeleton oil seal is a dynamic seal component. The existence of the "critical oil film" is a sufficient necessary condition for the oil seal seal. The seal without leakage is not allowed or impossible. Because the existence of lubricating oil membrane is indispensable to ensure the lubricating friction lock of the oil seal, and the presence of lubricating oil membranes makes a certain amount of leakage inevitable. In the process of rotating oil seal, during the use of 50 ~ 100 hours in the early stages of running, a small amount of leakage occurs. As the operating time is growing, leaks will gradually stop, and often this oil seal life is relatively long. During the valid use period, the trace leakage is allowed. Otherwise, it must be processed according to the common causes of failure in the following oil seals.

1. Poor oil sealing of the skeleton, causing early leakage

Extinction of serial number failure analysis and exclusion method

1 Smerief oil sealing sealing parts are poorly manufactured in the mouth, the quality of the skeleton oil seal sealing parts have burrs or defects to remove the burrs or replace the skeleton oil seal sealing parts

2 Sollet Oil sealing seal sealing spring is poor quality or failure of the failure skeleton sealing sealing part of the spring manufacturing quality.

3 The radial pressure is too small and the spring is too loose, and the tightly adjusts the small adjustment of the skeleton oil seal sealing spring

2. Smercial seal sealing parts are not well -equipped, and leaks occur

Extinction of serial number failure analysis and exclusion method

1 When the skeleton seal sealing parts are obviously equipped with obvious scars, the skeleton oil seal sealing parts through the key slot or thread to scratch the lip mouth to replace the skeleton oil sealing parts; when reinstalled, use a protective cover to protect the skeleton oil seal sealing lip mouth mouth.

2 Skeleton oil seal sealing parts are butterfly -shaped deformed skeleton oil seal seal installation tools improper redesigning and manufacturing skeleton oil seal seal installation tools

3 Skeleton oil seal sealing parts of the lip inlet direction flip or springs loosely cut off the axis end chamfer, rough and too high, or excessive assembly, causing the skeleton oil seal sealing lips to flip or spring falling from fine sandpaper to polish the axis end chamfer angle chag upside angle, , Apply oil, be careful to install the skeleton oil sealing parts

4 When the lip and shaft surface are coated with too much oil assembly on the lip and axis surface, the lip and shaft surface of the skeleton sealing parts and the axis surface are applied too much for a period of operation.