Quantcast Figure 3-9.--Brush holder and brush-rigging assembly.
 

Click here to make tpub.com your Home Page

Page Title: Figure 3-9.--Brush holder and brush-rigging assembly.
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

machine, use a throttling valve to reduce the
Keep  machines
in
good
mechanical
pressure. Always blow out any accumulation of water
condition.
in the air lines before directing the airstream on the
part or ma-chine to be cleaned. Be certain that the
The following paragraphs will discuss some of the
compressed air does not have any grit, oil, or
procedures to follow when performing maintenance
moisture content in it. Compressed air should be used
and repair on motor generators.
with  caution,  particularly  if  abrasive  particles
(carbon, and so on) are present, since these may be
Brushes
driven into the insulation or may be forced beneath
insulating tapes or other possible trouble spots. If
Brushes used in electric motors and generators are
vibration exists, check for loose parts or mounting
constructed of one or more plates of carbon, riding on a
bolts.
commutator, or collector ring (slip ring), to provide a
Motors, generators, and other electrical equipment
passage for electrical current to an internal or external
that have been wet with salt water should be flushed
circuit. The brushes are held in position by brush
out with fresh water and dried. Never let the
holders mounted on studs or brackets attached to the
equipment dry before flushing with fresh water. For
brush-mounting ring, or yoke. The brush holder studs,
complete  information  on  washing  and  drying
or brackets, and brush-mounting ring comprise the
procedures, refer to NSTM, chapter 300.
brush rigging. The brush rigging is insulated from, but
The key points in the maintenance of electric
attached to, the frame or one end bell of the machine.
generators and motors are as follows:
Flexible leads (pigtails) are used to connect the brushes
to the terminals of the external circuit. An adjustable
Keep insulation clean and dry.
spring is generally provided to maintain proper pressure
of the brush on the commutator to effect good
Keep electrical connections tight
commutation.
shows
a
typical
77.70
Figure 3-9.--Brush holder and brush-rigging assembly.

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.