Dust Extraction Fan

A customer faced high temperatures on a dust extraction fan application at an ore preparation plant; bearing temperature was being reduced with compressed air at high cost. An application review including thermal analysis revealed sealing problems: seal lip burning caused by high speed together with over-lubrication was driving the temperature rise. SNN Plummer Blocks and NSKHPS Spherical Roller Bearings with labyrinth seals were recommended with correct lubrication intervals and quantities; compressed air cooling was no longer needed.

• Dust extraction fan application — coal dust; 1 machine
• Bearing overheating was being compensated with expensive compressed air
• Incorrect lubrication quantity and frequency
• NSK solution: SNN Plummer Block and NSKHPS Spherical Roller Bearings with labyrinth seals
• €88,955 annual saving by eliminating the compressor requirement

Technical Features: SNN Plummer Block + NSKHPS Spherical Roller Bearing with Labyrinth Seal

• 2 lubrication holes and 1 drain hole
• Hard corners at the base for locating pins; square shape and centre marks
• High-grade casting — allows 5 different sealing arrangements (double-lip, V-ring, felt, labyrinth, taconite seals)
• High rigidity; minimises deformation of the bearing seat
• Good heat transfer; easy mounting
• The same housing can be used with double-row self-aligning ball or spherical roller bearings
• Low maintenance costs