Motor Overhauling

8/17/2019 Motor Overhauling

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Motor Overhauling


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Why overhauling isrequired ??


3/20

Motor details

• Plant-EC

• Tag No-P702 B

•

Mae-!ie"ens• !r# no-$%$&7

• 'W-22

•

(PM-$)*0• +,-)0


4/20

Overhauling Pro.edure

• (e.eive /or order or the "otor

– Che. i any a1nor"alities is "entioned#

• isual ins3e.tion o "otor – Note do/n the "issing4da"aged 3arts#

• Measure 5( 6P5 in T "otors8 andresistan.e4indu.tan.e o "otor#

•

Beore dis"antling 5M9 "ar :E and N:Eside#

• !tart dis"antling o "otor ro" N:E side#


5/20

IR in

megaohms(-E )00

;-E )00

B-E )00

(-; )00

;-B &00

B-( &00

Windings Resistance(ohms) Inductance(mH)

( 0#&0 2#7

; 0#)& 2#%

B 0#&0 2#7

5( at Megger voltage&00


6/20


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8/20

Bearing dis"ounting

• Methods – Cold dis"ounting

• ydrauli. 3uller

• Me.hani.al 3uller

– ot dis"ounting• =sing 5ndu.tion heater


9/20


10/20

+it > toleran.e"easure"ent• Clean :E-N:E shields o "otor /ith

diesel#

• Measure housing > shat di"ension/ith "i.ro"eter gauge#

• Mae sure they are /ithin thes3e.ied li"its#

• +or *2$042(! 1earing

Min 6""8 Ma@ 6""8 Measured

6""8

!hat6:E8

&0#002 &0#0$& &0#0$0

6N:E8

&0#002 &0#0$& &0#00&

ousing:E

A0 A0#0%& A0#002


11/20

• Clean stator9 rotor9 shat9 housing91earing inner and outer .over /ith.lean .loth#

• Clean and insert inner 1earing .a31eyond 1earing resting shoulder onshat#

• Mount 1earings on :E and N:E side#

• 33ly resh grease to ll grease.avities#


12/20

Bearing "ounting

• Methods – Cold "ounting

• With ha""er

• =sing "etal 1lo.s

– ot "ounting• 5ndu.tion heater

•

5ndu.tion 3late• Oil 1ath

• ot "ount


13/20

=sing indu.tion heater


14/20


15/20

• lign the 5nner Bearing Cover holes /ith holes o

housing 1y suita1ly su33orting the shat 1y a sot slingee3ing grease in-let hole in 1earing housing on to3#

• =se guide ring to avoid "ars on inner ra.e > rollers#

• Tighten 1earing housing 1y gradually tightening )1olts at equally o33osite lo.ation or unior" insertiono housing#

• t the sa"e ti"e 3ull the 1earing Cover as near as3ossi1le and tighten the .o"3lete 1earing asse"1ly#

• Then insert .ir.li3 and then housing on to shat#

• !i"ilarly9 asse"1le the N:E side and 3ut - seal#• t this stage the rotor should 1e ree to rotate#


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17/20

+inal tests

• No load test 6.he. 5( value 1eorethe tests8

• i1ration analysis

• Me.hani.al integrity – @ial 3lay

– (adial 3lay

– (un out


18/20

i1ration nalysis


19/20

Me.hani.al 5ntegrity .he.

• @ial 3lay- 0#02 ""

• (adial 3lay-0#02 ""

•

(un out- 0#0% ""


20/20

TN' ;O=

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Motor Overhauling