Interested to Buy Any Domain ? << Click Here >> for more details...
Do you know the overhauling of a motor?
- 12 Answers
- 58646 Views
- EdCET, Mecon, I also Faced
- E-Mail Answers
Answer Posted / laxmikant
"¢ Disassemble the fan assembly and remove the motor to the shop for overhaul.
"¢ Disassemble the motors. Thoroughly clean and examine all parts.
"¢ Protect machined surfaces.
"¢ Inspect and dimensionally measure motor components including end bells, frame, shaft, sleeve bearings, keyways, fan and running surfaces for wear, eccentricity and other defects. Submit a condition report with readings and conditions as found.
"¢ Completely strip and clean the armature, field coils and inter-pole coils as applicable.
"¢ Rewind the motor using new wire of the proper size and type as specified by the motor manufacturer or equivalent.
"¢ Perform insulation resistance test, DC High Pot or equal, on newly rewound motor and submit report to owner's engineering representative.
"¢ Replace bearings and grease seals, or sealed bearings as original and lubricate if required.
"¢ Renew all assembly hardware and gaskets on covers and inspection plates
"¢ Reassemble and dynamically balance the rotor and motor assemblies. Owner's on site engineering rep to witness
"¢ Reassemble the motor using new contractor provided; shaft sleeves, gaskets and fasteners, bearings.
"¢ All surfaces of the fan, fan housing and motor frames exterior shall be blasted and painted with two (2) coats of primer and one (1) finish coat
"¢ Upon completion of all repairs, inspection and approval by the owner's engineering rep, return assembly to the ship.
"¢ Reinstall motor assemblies using new fasteners and gaskets as original.
"¢ Reconnect the motor and perform operational test for rotation in presence of owner's engineering representative.
"¢ Test under operational conditions for minimum of one hour after temperatures stabilize. Record current voltage, speed and frame/bearing temperature rise at 15-minute intervals. Submit all reports and prove work satisfactory to the owner's engineering representative.
"¢ All interference's and earlier removals shall be reinstalled.
As the maintenace manager (the "owner's engineering rep" eventually reports to me), I'd like to know if anyone has any suggestions for improving the QA tests in the spec to ensure that we get the motors back in as a "like new" condition as possible. Please include in your responses the reasons why a certain test should be performed. Thanks in advance.
| Is This Answer Correct ? | 22 Yes | 2 No |
Post New Answer View All Answers
We have two parts in generator, electrical & mechanical. how it works?
How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?
What is primary and backup protection?
Define average demand?
why does make gain margin and phase margin on same plot.?
What is the bundle conductor?
Anybody tell me about modbus hex address of l&t trivector meter er300p??I want to read voltage,current,kwh etc via rs485...If anybody have a manual then send on my mail..Brijeshmodi18@gmail.Com
What is difference between unity power factor wattmeter and upper power factor wattmeter? In short circuit test of transformer the wattmeter used is unity power factor type or upper power factor type wattmeter?
I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.
what happen as when voltage drop(or may decrease) ? in case of atomic base theory?
how to operate and maintenance of 1500 kva diesel generator set
why we cannot protect 100% winding of an alternator by using differential protection?
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
what is meant by k-rating in isolation transformer?what is k9, k14 stands for?
checking procedure of capacitor based motors.used in fans etc?
