GE Verticle Induction Motor GEK-95352 Benutzerhandbuch
GEK-95352
4
I.
INTRODUCTION
General Electric high-thrust vertical mo-
tors covered by these instructions are
carefully constructed of high-quality ma-
terials and are designed to give long and
trouble-free service when properly in-
stalled and maintained. These motors are
generally used to drive pumps.
tors covered by these instructions are
carefully constructed of high-quality ma-
terials and are designed to give long and
trouble-free service when properly in-
stalled and maintained. These motors are
generally used to drive pumps.
Both HOLLOW-SHAFT and SOLID-
SHAFT motors are described in this in-
struction book. Figure 1 shows a typical
hollow-shaft high-thrust motor. The solid-
shaft construction is similar except that
the top half-coupling is omitted, and the
motor shaft extends out the bottom of the
motor. See Figure 2. 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 applica-
tions.
SHAFT motors are described in this in-
struction book. Figure 1 shows a typical
hollow-shaft high-thrust motor. The solid-
shaft construction is similar except that
the top half-coupling is omitted, and the
motor shaft extends out the bottom of the
motor. See Figure 2. 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 applica-
tions.
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 continu-
ous up-thrust. A typical high-thrust motor
with angular-contact ball bearings is
shown in Figure l. This standard con-
struction 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.
bearing arrangements for various external
thrust conditions imposed by the pump,
such as different magnitudes of down-
thrust and either momentary or continu-
ous up-thrust. A typical high-thrust motor
with angular-contact ball bearings is
shown in Figure l. This standard con-
struction 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.
Figure 3 shows a typical solid-shaft high-
thrust construction (on right side) for ap-
plications requiring continuous up-and-
down thrust capability. In this type of
motor, two or three angular-contact ball
bearings are mounted in opposed mount-
ing with one bearing oriented to carry up-
thrust construction (on right side) for ap-
plications requiring continuous up-and-
down thrust capability. In this type of
motor, two or three angular-contact ball
bearings are mounted in opposed mount-
ing with one bearing oriented to carry up-
thrust and one or two oriented to carry
down-thrust. If greater down-thrust ca-
pacity is required, motors may use one or
two standard angular-contact ball bear-
ings and one split-race bearing which
gives the capacity of two or three bear-
ings down and one bearing up. This does,
however, give more end-play than nor-
mal.
down-thrust. If greater down-thrust ca-
pacity is required, motors may use one or
two standard angular-contact ball bear-
ings and one split-race bearing which
gives the capacity of two or three bear-
ings down and one bearing up. This does,
however, give more end-play than nor-
mal.
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 car-
ries any radial load imposed by the pump.
IN-LINE motors are always of the solid-
shaft type. This construction is shown on
the left side of Figure 3.
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 car-
ries any radial load imposed by the pump.
IN-LINE motors are always of the solid-
shaft type. This construction is shown on
the left side of Figure 3.
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 2. Motors with
spherical-roller thrust bearings also re-
quire certain minimum down-thrust dur-
ing all continuous operation.
used for applications requiring extra high
down-thrust capacity and/or extra bearing
life; these bearings may require water-
cooling. See Figure 2. Motors with
spherical-roller thrust bearings also re-
quire certain minimum down-thrust dur-
ing all continuous operation.
Since overloading greatly reduces bearing
life, the amount of thrust applied should
not exceed the recommended values.
life, the amount of thrust applied should
not exceed the recommended values.
This instruction book applies to motors
with either Weather-Protected I or
Weather-Protected II enclosures as de-
fined by NEMA. Both of these are “open"
motors. (WP-II enclosure is not available
in 440 frame series.)
with either Weather-Protected I or
Weather-Protected II enclosures as de-
fined by NEMA. Both of these are “open"
motors. (WP-II enclosure is not available
in 440 frame series.)
Weather-Protected I motor construction is
shown in Figure 1 for 500 frame motors
and in Figure 3 for 440 frame motors.
shown in Figure 1 for 500 frame motors
and in Figure 3 for 440 frame motors.