Knowledge! What is the lubrication and sealing system of multi-stage centrifugal fans?

In today’s industrial sector, efficiency and reliability are key objectives for businesses. Addressing this demand, ZIBO DECENT COMPANY recently showcased its advanced lubrication and sealing technology, injecting new impetus into industrial efficiency.

The multi-stage centrifugal fans provided by this leading fan manufacturer not only boast excellent performance in design but also incorporate breakthrough innovations in lubrication and sealing systems. A customer raised inquiries regarding the lubrication and sealing systems of the product and received the following comprehensive and satisfactory response:

Why adopt external bearing and splash lubrication methods?

Firstly, the fan bearings utilize SKF bearings with lubrication provided through oil splash lubrication. The independent suspension of front and rear bearings outside the casing, isolated from internal flow channels, ensures no oil mist generation during operation. This design significantly simplifies maintenance procedures, allowing lubrication, inspection, or replacement of bearings without the need for separating pipelines or disassembling blower fans.

Secondly, temperature monitoring instruments are installed on both the drive and non-drive end bearing seats of the fan. These instruments enable real-time monitoring of bearing temperature parameters, providing effective protection against bearing damage. The use of thin oil lubrication not only ensures efficient heat dissipation but also includes forced cooling fans to lower temperatures, eliminating the need for additional water cooling systems.

Why use carbon ring seal and labyrinth seal? What is the difference between the two?

Lastly, for different conveying gas media and pressures, labyrinth seals and carbon ring seals are employed at the fan shaft ends. Labyrinth seals rely on a tortuous design path to prevent fluid leakage, while carbon ring seals form a sliding seal with the shaft surface.

Labyrinth seals are used where fluid leakage at low to moderate pressures needs to be controlled. Carbon ring seals are suitable where efficient sealing is required, especially at high speeds and pressures. Both sealing methods utilize a horizontal split design, allowing seal replacement without rotor disassembly, significantly enhancing maintenance efficiency. Particularly, carbon ring seals utilize graphite rings in direct contact with the shaft, requiring no oil lubrication, while the outer spring compensates for graphite ring wear, further extending seal lifespan.

The customer expressed satisfaction with this series of advanced technologies. This not only affirms ZIBO DECENT COMPANY’s technological innovation in the industrial sector but also sets the direction for industry development. Through continuous innovation in lubrication and sealing technology, multi-stage centrifugal fans will continue to provide customers with more efficient and reliable solutions, empowering industrial enterprises to achieve greater accomplishments.