Circulating fan-drive motors

Exemplary design

Brief description

The surface-air-cooled or water-cooled AC asynchronous motors with squirrel-cage rotor are constructed with a water- or air-cooled chamber in front of the DE-bearing shield. In addition, very long shafts of large diameter, made from special shaft material resistant to heat and chemicals, ensure resistance to heat (up to 1200 °C at the impeller) and aggressive media.

Application

The motors are used as fan drives for industrial furnaces.

Specifications

  • Shaft height: 80 to 355 mm
  • Power: up to 160 kW
  • Speed range: 0 to 3.000 rpm
  • Duty cycle: S1
  • Efficiency classes: IE 2 / IE 3
  • Cooling: IC 411 (self-ventilated)
  • Cooling: IC 70W (water cooling)
  • Voltage: 400 V / 50 Hz
  • Insulation class: F
  • Mounting: IM B5
  • SDegree of protection: IP 54
  • Vibration severity grade: A
  • Ambient temperature: -20 to 40 °C
  • Installation altitude: up to 1.000 m

Details of standard design

  • Shaft end made from C-45
  • Balancing with half key
  • Housing made from steel
  • Water- or air-cooled chamber drive end side
  • Lifetime lubricated rolling bearings
  • Bearing temperature monitoring with Pt 100
  • Primer RAL 7031

Options of electrical design

  • Optimized for frequency converter operation
  • Insulation class H
  • Winding temperature monitoring by thermo switch, PTC resistor or Pt100
  • With external fan (axial or radial)
  • Dimensioning as 2, 4, 6, 8, 10, 12, 24 or 36- pole motors (167 to 3000 rpm at a 50 Hz-mains)
  • Pole-changing motors (Dahlander) 4/2, 8/4, 12/6 –pole
  • Pole-changing motors (separate winding) 4/2 to 36/2, 6/4 to 36/4, 12/4/2 to 36/4/2

Options of mechanical design

  • Other mountings acc. to IEC 60034-7
  • Special shaft material (chemically - or heat-resistant)
  • Special bearings for high radial and axial loads
  • Vacuum-tight, evacuation connection
  • Manuel or automatic regreasing device
  • Protection class up to IP 55
  • Vibration severity grade B
  • Housing, bearing shields and terminal box made from ductile cast iron or steel
  • Construction to company standards
  • Different lacquer qualities , RAL- color at customers option

Options of built-on components

  • Brake
  • Optical or magnetic speed sensors

Options of certificates, special approvals, e.g..

  • GOST
  • Germanischer Lloyd
  • Diverse company standards
  • etc.

Example: motor 8WF280XS-06

  • Voltage: 400 V 50Hz, inverter-operation
  • Power: 55 kW S1 (continuous operation)
  • Speed: 985 rpm
  • Shaft height: 280 mm
  • water cooling with water chamber in front of drive end side

Application-specific technical details

  • Special shaft acc. to customer drawings (with key and castle nut)
  • Vacuum-tight design
  • Thread for vibration monitoring DE and NDE
  • Mounting V1 (vertical installation, shaft end downward)
  • Manual regreasing