The main function of the external sealing device of the bearing is to provide a layer of protection for the bearing to prevent dust, moisture, foreign matter and other impurities from the external environment from invading the interior of the bearing, thereby ensuring the normal operation of the bearing and extending its service life. At the same time, these sealing devices also help prevent the leakage of lubricant inside the bearing, maintain the lubrication effect of the bearing, and further improve the working efficiency and stability of the bearing.
The external sealing device of the bearing mainly plays the following functions:
1. Prevent the intrusion of external impurities: During the working process of the bearing, it may be affected by dust, moisture, foreign matter, etc. in the external environment. If these impurities enter the inside of the bearing, it may cause damage to the bearing or failure to operate normally. The external sealing device can effectively prevent these external impurities from invading the inside of the bearing and protect the bearing from damage by the external environment.
2. Prevent lubricant leakage: When the bearing is running, lubricant is needed to reduce friction and wear and improve operating efficiency. However, if the sealing performance of the bearing is poor, the lubricant may leak out, which will not only affect the lubrication effect of the bearing, but may also cause environmental pollution and safety issues. The external sealing device can ensure the sealing performance of the bearing and prevent the leakage of lubricant.
In addition, the types of external sealing devices include non-contact and contact types. The characteristic of non-contact sealing is that the seal does not come into contact with its relatively moving parts and has an appropriate gap. This form of sealing generates almost no frictional heat and no wear during operation, and is especially suitable for high-speed and high-temperature applications. Contact seals have other specific properties and application scenarios.
The external sealing device of the bearing plays an important role in protecting the bearing from external environmental damage and preventing lubricant leakage. It is one of the key components to ensure the normal operation of the bearing and extend its service life.
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