Installation instructions

GEI-M1011A
D. INTRODUCTION
General Electric high thrust vertical motors covered by
these instructions are carefully constructed of high quality
materials and are designed to give long and trouble-free
service when properly installed and maintained. These
motors are generally used to drive pumps.
Both HOLLOW-SHAFT and SOLID-SHAFT motors are
described in this instruction book. Hollow-shaft
construction is available in frame sizes 213 and larger
whereas solid-shaft construction is available in 182 and
larger. Figures 4-6 show typical hollow-shaft high thrust
motors and Figures 7-9 show typical solid-shaft high
thrust construction. Solid-shaft high thrust motors are not
suitable for driving loads that impose significant radial
load on the motor shaft; they should not, for example, be
used for belt drive applications.
Figure 9 shows a typical solid shaft high thrust
construction (on right side) for applications requiring
continuous up and down thrust capability. In this type of
motor, three angular contact ball bearings are mounted in
opposed mounting with one bearing oriented to carry up
thrust and two oriented to carry down thrust. If greater
down-thrust capacity is required, motors may use two
standard angular contact ball bearings and one split-race
bearing which gives the capacity of 3 bearings down and
one bearing up. This does, however, give more endplay
than normal.
Motors may be supplied with different bearing
arrangements for various external thrust conditions
imposed by the pump, such as different magnitudes of
down thrust and either momentary or continuous up thrust.
This standard construction is for high continuous down
thrust and is suitable for momentary up thrust equal to 30%
of the rated down-thrust capacity of a high thrust motor.
NOTE THAT ANGULAR CONTACT BEARINGS CAN
ONLY CARRY THRUST IN ONE DIRECTION.
IN-LINE motors (designed to be mounted on pumps which
are directly in the pipe line, and hence called IN-LINE
motors) are also covered by this instruction book. These
motors have two opposed-mounted angular contact ball
thrust bearings at the top end of the motor so they can carry
either up or down thrust. The lower guide bearing is a
radial-ball type and also carries any radial load imposed by
the pump. IN-LINE motors are always of the solid-shaft
type. This clamped construction is shown on Figures 7A
and 8A.
Spherical roller bearings are sometimes used for
applications requiring extra high down-thrust capacity
and/or extra bearing life; these bearings may require water
cooling. See Figure 10. Motors with spherical roller
thrust bearings also require a certain minimum down thrust
during all continuous operations.
Since overloading greatly reduces bearing life, the amount
of thrust applied should not exceed the recommended
values.
This instruction book applies to motors with Totally
Enclosed Fan Cooled enclosures as defined by NEMA.
Enclosed motors are characterized by an enclosure and
ventilating system that prevents the free exchange of air
between the inside and outside of the motor. The air inside
the motor is circulated by the rotor fans to carry heat to the
enclosed parts, while an external fan blows ambient air
over the motor to complete the cooling process.
E. Description of Labels and Nameplates
Motor ratings and identification data are furnished on
labels and nameplates. Labels provide basic motor
characteristics. Nameplates provide a permanent record of
motor characteristics, plant identification and date of
manufacture. Below is an example of a label that is
attached to the shipping package.
Figure 1 – Packing Label
F. Model and Serial Numbers
As discussed in Section E, every motor that is
manufactured by GE Industrial Systems will be provided
with a model and serial number, which is permanently
marked on the motor nameplate and shipping pack. These
numbers identify basic motor characteristics and pertinent
data. When contacting a GE Industrial Systems Service
Shop or representative, please refer to the model and serial
number. In the note section of this book, space has been
provided for you to record these numbers.
II. RECEIVING, HANDLING, AND STORAGE
Each motor should be carefully examined when received
and a claim filed with the carrier for any damage. The
nearest office of the General Electric Company may offer
guidance.
WARNING: The motor should be
lifted by the lugs provided. These
lugs are intended for lifting the
motor only and must not be used to
lift any additional weight. Be careful not to
touch overhead power lines with lifting
equipment. Failure to observe this warning may
result in personal injury or death.
If the motor is not to be installed immediately, it should be
stored in a clean, dry location. Precautions should be taken
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