GORMAN-RUPP VG3B3-B, Инструкция по установке, эксплуатации и обслуживанию

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Owing to the varied time and circumstances, motors are used, it is difficult to set the items and
periods for regular inspection and maintenance. However, as a guide it is recommended to be
performed periodically according to factory maintenance program. Generally, the inspection
scope determined by the following factors:
(a) Ambient temperature.
(b) Starting and stopping frequency.
(c) Troublesome parts usually affecting motor functions.
(d) Easily abraded parts.
(e) The important position of motor in the operational system of a factory should be duly
recognized. Therefore, its health and wellbeing should be fully protected especially when
it is operating in severe conditions.
5.2 Motor windings:
(a) Measurement of insulation resistance and standards to determine quality of insulation
resistance, please refer to measures stated in 3.1.2 “Measurement of insulation
resistance”.
(b) Inspection of coil-ends:
(1) Grease and dust accumulated on coils may cause insulation deterioration and poor
cooling effect.
(2) Moisture must not accumulate. Keep coils warm when motor is not in use if moisture
can be seen.
(3) Discoloring. This is mainly caused by overheating.
(c) Ensure no untoward change of wedges from original position.
(d) Ensure the binding at the coil end is in its normal position.
5.3 Clean the interior of the motor:
(a) After a motor is in operation for some time, accumulation of dust, carbon powder and
grease etc., on the inside is unavoidable, and may cause damage. Regular cleaning and
examination is necessary to assure top performance.
(b) Points to note during cleaning:
(1) If using compressed air or blower:
(a) Compressed air should be free of moisture.
(b) Maintain air pressure at 4 kg/cm², since high pressure can cause damage to coils.
(2) Vacuum
Vacuum cleaning can be used, both before and after other methods of cleaning, to
remove loose dirt and debris. It is a very effective way to remove loose surface
contamination from the winding without scattering. Vacuum cleaning tools should be
non-metallic to avoid any damage to thee winding insulation
(3) Wiping
Surface contamination on the winding can be removed by wiping using a soft, lint-free
wiping material. If the contamination is oily, the wiping material can be moistened
(not dripping wet) with a safety type petroleum solvent. In hazardous locations, a
solvent such as inhibited methyl chloroform may be used, but must be used sparingly
and immediately removed. While this solvent is non-flammable under ordinary
conditions, it is toxic and proper health and safety precautions should be followed
while using it.
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