Solution for Unsealed and High Temperature Resistant Pump Bearings
Introduction
Pump bearings are an important component of pumps and are used to support the running of the pump and reduce mechanical friction. Mechanical friction causes heat and wear and tear, which can lead to pump failure and ultimately increase costs. Poor sealing and high temperature resistance are two common problems associated with pump bearings. The former could cause leakage, leading to leakage of lubrication and wear and tear, while the latter could cause a shortening of bearing life due to thermal expansion and damage of its components.
Lubrication
The best way to improve the sealing performance of pump bearings is to select the proper lubricant. Lubricants should be chosen based on the application and the temperature of the work environment. Lubricants that are designed to resist wear, oxidation and corrosion are ideal. They should also have higher viscosity to provide better sealing performance even under high temperature. They can be specially modified to provide superior sealing performance.
Bearing Construction
To improve the wear resistance of pump bearings and make them work under high temperatures, their construction should be improved. Changing the geometry of bearing and the use of better material can help achieve this purpose. The typical materials primarily used in pump bearings are steel, special alloys and ceramic based bearing materials. Steel and alloys provide superior strength and wear and corrosion resistance, as well as a higher temperature range, but are more expensive. Ceramics offer excellent wear, heat and corrosion resistance but are also significantly more expensive.
Housing
Another important consideration for enhancing temperature resistance of pump bearings is the design of their housings. The housing should be designed to dissipate or minimize the heat generated by the pump, and some housings can be specially constructed to cool down bearings, by using a cooling medium such as air or oil.
Sealing
Sealing is a key factor for reducing wear and achieving a long-term, reliable performance of pump bearings, especially when operating at high temperature. The right seal can protect bearings by keeping off contaminants and preventing the loss of lubricants and thereby prolonging the life of pump bearings. Seals include static seals, such as O-rings, and dynamic seals, such as labyrinth seals and others.
Conclusion
In conclusion, pump bearings need to be designed specifically to improve their performance under high temperature. Selecting the right lubricant and materials, and improving their housings and sealing, can drastically improve their wear, heat and corrosion resistance and help them operate reliably and longer at high temperatures.
