STEAM TURBINE WO"NT ROTATE

Good answer Steve, If the turbine was not put up correctly then my guess is it will need to be rebuilt completely before starting it up. If it is not already gone to far and they decide to run it without rebuilding it first there is a good chance it will be ruined or damaged and it could cause the turbine and generator to wreck and get someone hurt or killed.

I witnessed a turbine wreck and come apart once and it is amazing that no one was badly hurt. The only injury was from a young kid running head on into a I-beam column trying to get away from it. The turbine started to vibrate at first and as the vibration got worse the main rear bearing gave way and ripped loose from it's base. Once the bearing was gone the shaft started to wobble around inside of the generator until it ripped loose and the turbine literally exploded sending parts through the ceiling, brick walls, and even through the shell of a tank located nearby. This all happened in a very short span of time although it seemed to be in slow motion to me.

We have an old recovery boiler that has been out of service for about 6 years now and when it was shut down it was in pretty good shape. While doing a retrofit on another boiler next to it the contractor cut off a drip leg that was sicking out of the dog house of this moth balled boiler to provide better access for a forklift to deliver parts to the other boiler rebuild. What he didn't do is to tell anyone about it and now after several years without a nitrogen purge, the inside of the tubes have corroded and pitted to the point that the boiler is ruined. It is a shame that someone would let any piece of equipment especially a large recovery boiler or steam turbine rust away like this when a simple nitrogen purge would have prevented it.

If this turbine has been out of service for this long and had no purge it may be corroded to far to be repaired. I think the minimum fix would be to break the turbine down completely, clean, inspect, repair any damaged or worn out parts, send the rotor out to be rebuilt and fitted with new bearings and reassemble. Before running I would also have a NDT thickness survey and a steam blow done on the incoming main steam pipe. If you have corrosion problems in the turbine then you will more than likely have the same problem n the steam piping that feeds it. A good long steam blow could keep you from ruining the turbine after spending all the time and money it takes to rebuild it.

I have a rebuilt rotor and new bearings, steam driven oil pump, and several other new or rebuilt parts for a Westinghouse steam turbine that I need to sell if anyone is interested. We used this type of turbine to run a couple of fans on a small boiler for years before we installed electric fan motors. I got the rotor by winning a lot of new old stock parts/equipment that was auctioned off where I work. I just couldn't seem to make myself throw it in the scrap heap without at least trying to find someone that might need it. It now sits in a crate in the back of my shop waiting for the day I either sell it for someone to use or get tired of it being in my way and just scrap it out for a few bucks.

I agree w/ Steve S. Another consideration is that after 5 years, the axis has sagged enough to make start-up impossible. Tear it down, clean it up, re balance everything. Then run the turning gear for a few days. Re-align it again. Then 24 hours on turning gear before spin up.

The generator will have to be treated likewise, because it has damn sure sagged out of alignment. And your coupling bolts are suspect as well.

my dear we opened the turning gear segment both bearings and all gov parts like pump oil relay system and shaft driven lube oil pump we opened the top cover of gear box. all above said parts found normal and clean free from rust. why you are assuming that there is to much corrosion in side the turbine. please tel me that can we check the inside the turbine like boreoscopy or any simple method

my dear with the help of God we have run the turbine now the turbine is generating power quite efficiently now you can add this story in your experiences regards and thanks to Allah and also thanks to you mr steve

Take it apart, clean it up, inspect the whole business, and run it at temperature on the turning gear for a couple of weeks. You'll be lucky if the spindle hasn't sagged into hard contact with the stationary members. I did see one unit that was shut down hot and not put on turning gear; it still isn't running.

my dear we removed the shims which we put bottom side of bearings to lift the turbine rotor check the radial runout of shaft on every exposed portion of rotor ther is not more then .005 mm runout on the rotor we checked alignment of rotor with gearbox turbine is .03mm lower then gearbox bearing radial and axial clearance are normal flange type rigid coupling is between turbine and gearbox we lift the turbine from bearing position(bump lift) internal labyrinth clearance is .4mm and after that we removed the both radial bearing to check the lower internal labyrinth clearance that was .35mm after complete box up both bearing and coupling we started the oil pump and after 8 hour put the turbine on turning gear (100rpm)we run the turbine for 3 hours on turning gear inshaallah tomorrow we shall turn the turbine on tuning gear in presence of steam for pre power generation

u have to check the radial run out of rotor ?