GE Energy Motors GEEP-427-I Copyright 2009, The General Electric Company, USA
39
GEEP-427-I Pegasus, Horizontal Induction Motor
TEWAC, Sleeve Bearing
Machine Assembly
General
The machine assembly consists of the frame, end
shields, end-shield covers, air deflectors, stator core and
coils, rotor, power terminal box, accessory terminal box,
and bearings.
The frame fabrication has been designed to deliver
the weight of the unit and the reaction torque to the
foundation.
The assembly also directs the cooling air through
the active parts of the machine.
In a top-cover machine, cooling air from the top
cover enters the top of the frame at the two ends. The air
is then directed by the air deflectors into the two fans on
each end of the rotor, where the pressure is increased.
This causes the air to flow through the air passages in the
rotor and stator. The cool air removes the heat from the
core and coils as it passes over the surface of these active
parts. Finally, the heated air is discharged around the
periphery of the stator core, where it is directed upward
into the top cover.
In a dripproof machine, cooling air enters the
frame through openings in the end shields. The air is then
directed by the air
deflectors into the
two fans on each
end of the rotor,
where the pressure
is increased. This
causes the air to
flow through the
air passages in the
rotor and stator.
The cool air
removes the heat
from the core and
coils as it passes
over the surface of
these active parts.
Finally, the heated
air is discharged
around the periphery of the stator core, and then through
the side frame openings.
Frame
The fabricated rectangular frame holds the other
various parts of the unit in proper position during
operation and positions the drive and in the correct
vertical ad axial alignment with the driven equipment.
The frame includes:
4 lifting lugs - 2 on each side - near the ends of
the frame.
4 ground pads - 2 on each lower side - near the
ends of the frame.
On top-cover enclosures: 2 gasketed access-cover
plates, one on each lower-side of the frame. The
plates run the full length of the frame and cover
the access holes to the foundation bolts, dowels
and space heaters.
Fig. 1 Dripproof Machine Assembly
Summary of Contents for Pegasus MHV EP-427-I
Page 46: ...GE Energy Motors 46 ...
