Ashley Burton
Member
- Messages
- 5,122
- Location
- Northamptonhire
Can't say I would want to be involved in this type of job:
Looks like a lot of work!
Looks like a lot of work!
- Thread starter Ashley Burton
- Start date
Ashley Burton
Member
- Messages
- 5,122
- Location
- Northamptonhire
Its some serious stuff! Wouldn't want it to fall on you, That crankshaft weighed 7.5T in that video!
Ashley Burton
Member
- Messages
- 5,122
- Location
- Northamptonhire
I would dread to think how long some of these ship engines run for!
Parm
Respect The Sound System
- Messages
- 18,009
- Location
- Towcester
Depends who and where you are and how critical it all is. Some are serviced regularly and others only fixed when the break
Parm
Respect The Sound System
- Messages
- 18,009
- Location
- Towcester
I can believe that, I’ve certainly seen pictures where covers can be removed giving full access to the crank, wouldn’t want to be the “greaser”
Ashley Burton
Member
- Messages
- 5,122
- Location
- Northamptonhire
Sounds like a greasey job
gordon stephenson
Member
- Messages
- 7,473
- Location
- Skelton in Cleveland U.K.
I have worked on huge Linde compressors, But the crank was only about 14feet long, One piece casting for the crankcase, Quite a lot of a juggling act to rig it multiple times to get it out of the crankcase at the thrust end, Always a nice interesting job refitting the crank and doing all the alignment adjustments to correct any deflections etc, Been retired a long time now and I still miss the work and workmates,
jerrytug
Member
- Messages
- 1,834
- Location
- Isle of Wight
Myself never having assembled a ship engine over 1000hp...
I always wonder how they torque down the main bearing caps, big ends, cylinder head studs etc, on these motors, and bigger ones.
I've seen a 7 foot long torque wrench used in Grimsby, and even that was only on a 900hp, and it was getting a bit silly
At some point, the loads must become too big for a large gent and a BFO flogging spanner, or a multiplier.. do they use a power driven torque wrench?
I always wonder how they torque down the main bearing caps, big ends, cylinder head studs etc, on these motors, and bigger ones.
I've seen a 7 foot long torque wrench used in Grimsby, and even that was only on a 900hp, and it was getting a bit silly
At some point, the loads must become too big for a large gent and a BFO flogging spanner, or a multiplier.. do they use a power driven torque wrench?
tflnemesis
Member
- Messages
- 650
Yes they use a system like that in the steel works - they stretch a bolt - then nip up the nut - then release the tension.
I have spent a lot of time in ships engine rooms - first place I head for. I was lucky enough to travel by tanker a few times.
That video was great - but you would think they would have made access a bit easier!
Some of the biggest engines only turn over at about 120rpm so they can run a lot longer than something screaming away at 3000rpm!
Ashley Burton
Member
- Messages
- 5,122
- Location
- Northamptonhire
Very true! Diesel engines mainly run at low rpm due to their torque.
70rpm!
They build them like that so they are direct drive - gearboxes get a bit big at that bhp!
The way these things are built they are almost like steam engines - I am sure IKB or Stephenson would be well at home with them!
BTW that thing weighs over 2300 tons and is about 110,000HP!
Oh and regarding the original post the crankshaft weighs 300 tons.......
One of my colleagues used to work on boat engines years a go and they had a guy die because he was in the engine and got crushed as someone rotated the crank.
Oh God that doesn't bear thinking about! You don't get 2nd chances with stuff that size!
