MagnaDrive Coupling Air Preheater
Minnesota Power Upgrade to MagnaDrive Magnetic Couplings on Air Pre-Heaters.
1.0 Problem
Minnesota Power was experiencing vibration problems on their Air Pre-Heaters. In an effort to correct this problem, Minnesota Power implemented a preventative maintenance procedure that required all couplings to be re-greased during every outage.
Each re-greasing would tie up 3 Maintenance Technicians for 3 days. Worse yet, the reduction in vibration levels that was accomplished by the regreasing would only last a couple of weeks before the vibration would return.
2.0 Solution
MagnaDrive approached Minnesota Power with a proposal to replace the existing couplings with MagnaDrive Magnetic Couplings.
3.0 Result
Minnesota Power’s vibration problems on their Air Pre-Heaters have been completely eliminated. Estimated savings based on quarterly outages and 9 mandays per outage is: 4 outages X 9 man-days/outage X $600 /man-day = $21,600 annually!
Supporting Data:
Minnesota Power Cohassett, MN
Vertical Market: Power Generation
Application Type: Equipment/Machinery
Product: Magnetic Coupling, Total of 4 in use
Load Type: Air Preheater
Motor Characteristics: 40 hp 1800 rpm
MagnaDrive Advanatages:
- Thermal Shaft Expansion
- Vibration Isolation
- Reduced Maintenance
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