What is the Function of External Sealing Devices for Cylindrical Roller Bearings?

The primary function of external sealing devices for cylindrical roller bearings is to provide a protective barrier, preventing contaminants such as dust, moisture, and foreign particles from entering the bearing interior. This ensures the normal operation of the bearing and extends its service life. Additionally, these sealing devices help prevent the leakage of lubricants from within the bearing, maintaining effective lubrication and further improving the bearing’s operational efficiency and stability.

The main roles of external sealing devices for cylindrical roller bearings are as follows:

1.Preventing External Contaminants from Entering

During operation, cylindrical roller bearings may be exposed to environmental factors such as dust, moisture, and foreign particles. If these contaminants enter the bearing, they can cause damage or disrupt its normal functioning. External sealing devices effectively block these contaminants, protecting the bearing from environmental damage.

2.Preventing Lubricant Leakage

Cylindrical roller bearings require lubricants to reduce friction and wear during operation, enhancing efficiency. However, poor sealing performance can lead to lubricant leakage, which not only reduces lubrication effectiveness but may also result in environmental pollution and safety issues. External sealing devices ensure proper sealing performance, preventing lubricant leakage.

3.Types of Sealing Devices

External sealing devices are categorized into two main types: non-contact seals and contact seals.

I.Non-contact Seals: These seals do not make physical contact with the rotating components and maintain an appropriate gap. They generate almost no frictional heat and experience no wear during operation, making them particularly suitable for high-speed and high-temperature applications.

II.Contact Seals: These seals make direct contact with the rotating components, providing excellent sealing performance. They are ideal for environments with significant exposure to dust, water, or other contaminants, especially under low to moderate-speed conditions.

4.Conclusion

External sealing devices play a crucial role in protecting cylindrical roller bearings from environmental damage and preventing lubricant leakage. They are essential components that ensure the reliable operation and extended lifespan of bearings.

For more information, feel free to contact QIBR