Search results
Results From The WOW.Com Content Network
Period cutaway diagram of a triple-expansion steam engine installation, circa 1918. This particular diagram illustrates possible engine cutoff locations, after the Lusitania disaster and others made it clear that this was an important safety feature. A marine steam engine is a steam engine that is used to power a ship or boat.
Double-acting triple-expansion marine engine. High-pressure steam (red) passes through three stages, exhausting as low-pressure steam (blue) to the condenser. It is a logical extension of the compound engine (described above) to split the expansion into yet more stages to increase efficiency. The result is the multiple-expansion engine.
The image in this section shows an animation of a triple-expansion engine. The steam travels through the engine from left to right. The valve chest for each of the cylinders is to the left of the corresponding cylinder. [citation needed] Land-based steam engines could exhaust their steam to atmosphere, as feed water was usually readily available.
The solution was the triple expansion engine, in which steam was successively expanded in a high pressure, intermediate pressure and a low pressure cylinder. [ 27 ] : 89 [ 28 ] : 106-111 The theory of this was established in the 1850s by John Elder , but it was clear that triple expansion engines needed steam at, by the standards of the day ...
In a triple-expansion steam engine, the steam passes through three successive cylinders of increasing size and decreasing pressure. Such engines were the most common marine engines in the golden age of steam. These examples and compound turbines are the main but not the only uses of compounding in engines, see below.
Engine No 6, also called The Sir William Prescott, has been restored to running order and is the largest fully operational triple-expansion steam engine in the world. [4] It may be seen in steam on various weekends throughout the year, and as a static display every Sunday between March and November. [ 5 ]
The triple-expansion steam engine cylinders, located on the second story of the engine, are supported by six vertical and six diagonal columns, creating space for three vertical pistons to move up and down. The vertical rods with 6-foot (1.8 m) stroke from the engine drive a horizontal crankshaft which is also
Waverley is powered by a three-crank diagonal triple-expansion marine steam engine built by Rankin & Blackmore, Engineers, Eagle Foundry, Greenock, Scotland. [19] It is rated at 2,100 IHP and achieved a trial speed of 18.37 knots (34.02 km/h; 21.14 mph) at 57.8 rpm. Passengers can watch this engine from passageways on either side of the engine ...