Author Topic: Triple expansion double acting steam engine conundrum  (Read 1068 times)

Offline ChuckKey

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Re: Triple expansion double acting steam engine conundrum
« Reply #15 on: September 06, 2019, 12:11:18 AM »
The River Don engine is 3-cylinder high pressure, but the Bratch & Kempton Park engines are triple expansion.

Offline steamer

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Re: Triple expansion double acting steam engine conundrum
« Reply #16 on: September 06, 2019, 01:43:52 AM »
In many engines, HP cylinder have piston valve and slide valves in the IP & LP cylinders, hence valve settings are obviously different.
And some engines don't have a receiver in its own, but simply large piping and steam chest !

The combined volume of the steam pipes and steam chests all add to the overall receiver volume.  A receiver is simply a connecting enclosed chamber.

Just because the valve concept is different,   slide valve, piston valve, Corliss valve, ect...doesn't mean the timing is necessarily different.   What controls the cut off between the HP and the next cylinder is the cylinder ratio, and the cut off of the HP cylinder.

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline steam guy willy

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Re: Triple expansion double acting steam engine conundrum
« Reply #17 on: September 06, 2019, 03:06:03 AM »
Hi All ,with the Beeleigh mill Woolf compound beam engine  the pistons reciprocated together as well as the valve rods. the HP exhaust entered directly into the LP steam chest.  It worked really well with steam but not so well with air...

Willy