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How stuff works
Posted by Ray L (more from Ray L) on Sat, 20 Nov 2004 20:06:17
In Reply to: Turbo rpm, Lincoln Lee, Sat, 20 Nov 2004 08:02:35
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Here is a quote from "How stuff works:"
"In order to achieve this boost, the turbocharger uses the exhaust flow from the engine to spin a turbine, which in turn spins an air pump. The turbine in the turbocharger spins at speeds of up to 150,000 rotations per minute (rpm) -- that's about 30 times faster than most car engines can go. And since it is hooked up to the exhaust, the temperatures in the turbine are also very high" and "In order to handle speeds of up to 150,000 rpm, the turbine shaft has to be supported very carefully. Most bearings would explode at speeds like this, so most turbochargers use a fluid bearing. This type of bearing supports the shaft on a thin layer of oil that is constantly pumped around the shaft. This serves two purposes: It cools the shaft and some of the other turbocharger parts, and it allows the shaft to spin without much friction."
I've heard of some turbos spinning in excess of 160,000 rpm, which is why a very good oil is vital for the durability of turbocharged engines.
posted by 66.91.20...
Posts in this Thread:
- Turbo rpm, Lincoln Lee, Sat, 20 Nov 2004 08:02:35
- How stuff works, Ray L, Sat, 20 Nov 2004 20:06:17 <-- Viewing This Message
- I'm with you (and destijl) in this one...>> Link..>, PGAero , Sat, 20 Nov 2004 14:55:14
- Re: Turbo rpm, destijl, Sat, 20 Nov 2004 08:37:49
- Re: Turbo rpm, TML , Sat, 20 Nov 2004 08:27:19
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