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Dual Drive Fan

  • Application: Copper Mine Process Air Fan, Dual Drive system / Overrunning clutch for dual drive Fan application / Turning Operation for Induced Draft Fan
  • Model Name:
    • Shaft Mounted: NSO, NR C1C8C9 / NFRC, NHBU E1E8E9, NHBUFC & NSOFC
    • Foot Mounted: NDU & NHFC
  • Product Name: Overrunning Clutch / Freewheel clutch / Freewheel clutch coupling
  • Freewheel one way clutch is used as: Overrunning
  • Function: Freewheel one-way clutch disengages automatically when the driven member rotates faster than the driving member.

Fans are used in copper ore processing facilities to exhaust hot air generated by equipment. Fans dealing with high temperature gases need to rotate continuously at low speed when turned off during cooling periods. When the fan's main drive stops, the overrunning clutch engages, secondary motor/gear reducer drivetrain that rotates the fan very slowly. This cooling period is necessary to reduce the temperature of the large squirrel cage fans and 4" diameter shafts, protecting them from sagging and warping damage due to their weight and exposure to elevated temperatures.

The overrunning clutch will automatically disengage the low-speed drive when the main high-speed motor starts, preventing possible damage to the low-speed drive.