27 October 2022
Bespoke Pit Fan Motors With Fin Cooling
MENZEL ELEKTROMOTOREN HAS
designed and manufactured three
powerful 6,600V squirrel cage motors
as integral components for pit fans. A
customer specified cylindrical motor
casings as compact as possible. The
greatest challenge was implementing
the required rated power of 1,700kW in
cylindrical casings. To achieve this, Menzel
designed fin-cooled motors (cooling type
IC 411) in frame size 630, an unusual
design for motors this large.
The manufacture is complex, but
the result is optimal for the constricted
installation conditions. To save additional
space, all connection cables are routed
out of the motors, and the terminal boxes
are mounted outside the fans.
Since the driven fan wheels are
mounted directly on the motor shafts,
the motor bearing must compensate for
additional high loads; radial loads up to
20700N and axial loads up to 27000N.
For the required bearing service life of 100,000 hours, Menzel implemented a
special rolling bearing setup. In addition,
the motors have a second shaft end for
a holding brake. The three-phase squirrel
cage motors are designed for operation
on a frequency converter (duty type S9) with speed changes and reversal of the
rotation direction. This allows the pit
fans to ventilate the mine and extract
dangerous firedamp if necessary.
www.menzel-motors.com
Menzel Great Britain Limited, 27 HUNT DRIVE, MELTON MOWBRAY, LE13 1PB
07944644792
More News from the AEMT
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The Winners of the 2022 AEMT Awards were announced during a Gala Presentation Ceremony in Coventry on Thursday 17th November. With a near record attendance, from right across the electrical and mechanical trades arena, the evening once again proved to be a wonderful evening of reward and celebration. Following the success of the previous four years, there was a good deal of excitement and anticipation ahead of the event with attendees eager to unite and engage with their colleagues and peers.
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Renew Mag
27 October 2022
The 5th annual Association of Electrical & Mechanical Trades (AEMT) awards returns to
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