Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
GENERATOR ROTOR REMOVAL PLATFORM
- Thread starter amper
- Start date
- Thread starter
- #21
hi scotty well space around is limited the machine is over 10k working hours you righ we want to try rail out there our requesting question is were to find a more fear price on a rail system some company pretend to charge over 120K us dollars is ridiculous prices just only for the removal rail system . which only will be use every 10k hours .
In the days of steam power ststions (i.e. before the 70's) all large power stations had a station crane. (also known as a travelling crane). This would be sized to lift any part of the station plant, turbine casings, rotors, generator rotor, stator etc. This resulted in the crane and its supports being designed to accomodate the forces.
So you had a large, costly "power station" building.
Along come the 70's and gas turbines. Salesman "You do not need those big power station buildings, we have these simple packaged units, so cheap, lightweight turbines etc etc". Everyone forgot that the generator parts had the same mass. No station crane........ Also, some had the bright idea of not using water (via heat exchangers) to cool the generator air. No water for the gas turbine, so why not save even more money and open ventilate the generator. Dust in the air? Filters, they take all the dirt out!
So we went from generators that ran on base load, closed air circuit. To gas turbine driven units, on peaking or cyclic duty, open air circuit.
So we have the guys in the field, like the OP, who have to clean out the generator every 10,000 hours, not every 10 years!
Sorry for the whinge!
We devised a skid method of putting curved plates between the rotor and the stator bore, to minimise the use of a crane when pulling out the rotor. Find an expert company and talk to them.
Finally, lift the rotor as Scotty shows, by the body NEVER by the end caps (end bells)
So you had a large, costly "power station" building.
Along come the 70's and gas turbines. Salesman "You do not need those big power station buildings, we have these simple packaged units, so cheap, lightweight turbines etc etc". Everyone forgot that the generator parts had the same mass. No station crane........ Also, some had the bright idea of not using water (via heat exchangers) to cool the generator air. No water for the gas turbine, so why not save even more money and open ventilate the generator. Dust in the air? Filters, they take all the dirt out!
So we went from generators that ran on base load, closed air circuit. To gas turbine driven units, on peaking or cyclic duty, open air circuit.
So we have the guys in the field, like the OP, who have to clean out the generator every 10,000 hours, not every 10 years!
Sorry for the whinge!
We devised a skid method of putting curved plates between the rotor and the stator bore, to minimise the use of a crane when pulling out the rotor. Find an expert company and talk to them.
Finally, lift the rotor as Scotty shows, by the body NEVER by the end caps (end bells)
Whinge away! You wanna try running an outage in the rainy North-East of England where if the rain stops it gets windy: perfect conditions to pull the rotor out of a hydrogen-cooled machine and lift it down 20m to grade using a mobile crane. Massive bad-weather stand-down costs? Check. Wet generator? Check. Outage programme in tatters? Check. Gotta love power plants designed by accountants.
----------------------------------
If we learn from our mistakes I'm getting a great education!
----------------------------------
If we learn from our mistakes I'm getting a great education!
- Thread starter
- #24
- Status
Similar threads
- Locked
- Question
- Question
- Locked
- Question