The Main Bearing - Turbine Engines: A Closer Look
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- เผยแพร่เมื่อ 20 ก.ค. 2012
- The main thrust bearing in our helicopter engine is being inspected and rebuilt. We'll look at just how all the parts stack together, and how the oil is kept around the bearing by seals on either side of it. This forms what is called a bearing sump.
Update June 2013: So far this engine has powered Unnatural Disaster #357 to a win in every race it has entered.
So yes, the effort was well worth it !
Let's not forget that the driver has a great deal to do with the boats performance.
I am lucky to be working for world champion Gord Humphrey. - ยานยนต์และพาหนะ
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Now I get it, I had always wondered and marveled at how those bearings are oiled inside a jet engine.
It's great to hear that from people who are really interested. If there is something particular you want to see, let me know. It's not always possible, but I will try !
As a parts man in the auto industry, I've spent my life looking at machines in diagram form. I've seen a vast array of jet/turbine animations and always understood basic concepts, but your videos have really helped me understand the actual goings on inside the case. Thank you!
The main bearing is a thrust bearing, which means it keeps the shaft in position axially, which means it carries loads which are parallel to its axis of rotation. The #1 and #3 bearings are roller bearings, which allow the main shaft to expand and contract as it heats up and cools down.
We use Mobil Jet1 in this engine, and it is changed very frequently. This is a race vehicle, so it's basically under constant development and maintenance.
In a helicopter, the oil level would be checked before and after every flight, and the oil would be changed every 150 hours of operation.
Like your channel very informative
The actual load on the thrust bearing in any turbine engine is a topic of much mystery and great debate. That's all I'm sayin !
The raceboat community has adopted turbine engines fairly recently, and we were approached for a bit of information, being the turbine engine professionals that we are.
I was interested, and I think what we can bring into the picture is increased engine reliability.
The Iroquois is slowly being cleaned up and assembled. As we go, we will discover which parts we need to make or find.
The mating face is flat. I don't know why they are that way... but they work.
As long as the supply of surplus T58s remains, the turbine boats will have the performance edge, and they are not much more expensive than a 1000Hp V8.
The T58 was a popular engine, built in the thousands over more than 25 years.
They still are flying, so parts availability is there, but you have to pay aircraft prices for them...
No. Thank you for explaining! Great videos man!
Really awesome video Jay! Thanks for uploading! Can't wait for more!
That's not my toolbox. Mine is much smaller. As you way have noticed, all the fasters are quite small... and then there are the special tools, which are unique to each engine.
One of your better informative videos. Very well explained. Thank you.
Really appreciate all the time and effort you put into sharing all you do. Great effort (as always!!)
Excellent video, sir.
thanks a lot
The blades form a stack of circles. They do not form a spiral, as a thread on a screw...
I'm learning a lot keep update us. getting smarter everyday
thanks, perfect example of how a picture paints a thousand word. even more, it's a video :)
Great video. I learned something tonight
Always wondered how those labyrinth "seals" worked. Great explanation, thanks!
Fascinating video...Thanks!
Fantastic stuff. It's all really clever.
Great video. I might have learned something today.
Fantastic info!
Very good video thanks!
Thanks. Very well described.
Thank you very much Sr.
It just show how much thought and calculations must go into the design when it comes to controlled air leakage.
YES! Maybe im partial, but that would be one cool ass show! Heck of an idea! Discovery, are you listening?
THANKS!!
Nice vídeo ! view 2017.
This is what I wanted to see.
Would like to see the guts of a reduction drive unit too. Have you done one on that?
Is it a new thing in the jet boat world? Hydros have run T55's for years and many offshore race and pleasure boats run T53's or T55's.
What's your thoughts on it in the jet boat world? Are there enough boats racing with turbines to keep the sport competitive? It's a problem seen in offshore racing at the moment because of the money involved running turbine cats. I believe Miss Geico has just dropped out of the turbine class due to lack of competition. Sad, I really like the turbine class boats.
Thanks for uploading this new vid, I have a question, how much is the force on this thrust bearing? I think it is just the force caused by the difference of the pressure after the last stage of compressor and the inside of the combustion chamber, because the ignited fuel will have a similar force on the turbine.
Jay, is there anything in a boating environment besides rough the rough ride and harsh rpm changes that affects reliability?
Really excited to see the unfolding story of the Iroquois! Hope you guys/gals don't have to make or find any major parts, rotor parts. Gears, lines, that kind of stuff wouldn't be so bad. Anything you know of now thats needed?
Thanks!
Can you tell me about the maker of the bearing and the reference, only for study purposes. Thanks a lot
What kind of oil does the engine need?how often it needs to be changed /i know its not a car but its very interesting
How did you land the raceboat job? Is this race boat thing your gig, or is it an S & S Turbines thing? A very cool job, very different from the usual stuff with the LM's.
Any news on the Iroquois. I'm very interested in the CF-105, so naturally also the Iroquois.
Can you explain how a A-B-C sumps are made and works in an aero-engine? If it isn t a problem anyway. Thanks for what you do man! Cheers from Italy!
ABC are just names. You could say 123. Otherwise, bearing sumps are described in several vids, including Jet Engine Lube System.
Have seen video on compressor blades.
Can see washout, but, no or minimal sweepback.
Please explain.
Those are two terms I have never encountered in discussions or reading about compressor blade design. If you are comparing to aircraft wings shape, compressor blades remain subsonic under all running conditions.
I am very interested to know about jet engine bearing
why is the rear seal tighter than the front seal?
do turbine oils contain anti wear additives ? Is it correct that turbine oils are always synthetic ? How much oil does a helicopter engine contain and how much a larger jet engine ? Thanks
When does your show on Discovery Channel start?
Don't these labyrith seals have an equally serrated outer race? How can you then simply insert them axially and still have the teeth to mesh? If there aren't groves on the outer race, then why bother with them on the inner race, since there would already be a straight path?
Can you show disassembly of Hp /Ip bearing section of trent series engine
No. We don't work on those...
Is there a jet engine or steam turbine that use air bearings?
None of the engines I have worked on use air bearings.
Why is the bearing golden?
It is not golden. It might be golden colored, but that is not the same thing, and the difference is extremely important. If you respond by saying it's "just semantics" ...
The metal parts have been stained by hot oil, so they take on a brownish or golden coloration.