GE: FRAME 9E LIFT OIL PUMP TROUBLE EVERY SHUTDOWN TURNING GEAR NOT ENGUAGE DUE TO LOW PRESSURE AND CHANGEOVER AGAIN AND AGAIN.

Good Evening to all experts,

Dear CSA, as you know lift oil pump just running in startup of gas turbine and if power plant continuously running in production mode , we cant able to test run 88QB lift oil pump.
previously we just did trial run after any mechanical outage like( CI AND HGPI ).

we face problem in one unit thrice that after shutdown when turbine reach turning gear speed lift oil pump again and again changeover .

you know turning gear is very very important after shutdown and some time we haven't any maintenance team in night shift.

so what you advice what we can do to not face this trouble and this key equipment for turning gear.

is this normal when turbine running on base load and we can run 88QB for trial run. is this have any effects on vibration?
 
Good Evening to all experts,

Dear CSA, as you know lift oil pump just running in startup of gas turbine and if power plant continuously running in production mode , we cant able to test run 88QB lift oil pump.
previously we just did trial run after any mechanical outage like( CI AND HGPI ).

we face problem in one unit thrice that after shutdown when turbine reach turning gear speed lift oil pump again and again changeover .

you know turning gear is very very important after shutdown and some time we haven't any maintenance team in night shift.

so what you advice what we can do to not face this trouble and this key equipment for turning gear.

is this normal when turbine running on base load and we can run 88QB for trial run. is this have any effects on vibration?
Good evening,

Without be able to check the specific site/unit application code or CSP ...( you did not mentioned Turrbine controls systems type Mark*** or other??).

Are you saying that Jacking oil pump motor 88QB can be running on Base load ?? or you want /can test 88QB during Base load?

You can try to share app code/csp file regarding Lube oil/jacking oil pump operations , and we can then try to add some notes for helping you to solve this issue.

Controls Guy25.
 
Good Evening,

dear we have mark6e control system, we have GE FRAME 9E DLN gasturbine. 88QB LIFT OIL PUMP.

Yes is we can trial run manually lift oil pump on baseload and is this effect on machine vibration, i want because of long standstill this pump due to turbine running on baseload.
is good whenever we plan shutdown a day before we can start this pump manually for check discharge pressure and all alarms of filters dp.

whats your suggestion ?
 
Good Evening,

dear we have mark6e control system, we have GE FRAME 9E DLN gasturbine. 88QB LIFT OIL PUMP.

Yes is we can trial run manually lift oil pump on baseload and is this effect on machine vibration, i want because of long standstill this pump due to turbine running on baseload.
is good whenever we plan shutdown a day before we can start this pump manually for check discharge pressure and all alarms of filters dp.

whats your suggestion ?
Thank you for the response and clarifications...

My advise would be to follow OEM instructions on such operations with jacking oil pump...

I have been told that philosophy on "88BQ online testing" should be done according to GE specifications in occurence.


Your suggestion is good , by planing a shutdown you can do the mentioned testing and check the differents parameters to make sure that the system is working properly.

Can you tell us if you get alarms annunciated during change over ..

Again without check the P&ID , it would be difficult to give more advises.

Are you suspecting a Pressure drop in lube oil system ...

You can also have a search on this wonderful forum for any similars issue ...

Controls Guy25.
 
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