This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...of a set of stationary and of rotating blades. Part of the expansion of the steam takes place in the stationary blades and part in the moving blades. In the impulse turbine the pressure on both sides of the moving wheel is very nearly the same; in the reaction turbine the pressure at the inlet to the ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...of a set of stationary and of rotating blades. Part of the expansion of the steam takes place in the stationary blades and part in the moving blades. In the impulse turbine the pressure on both sides of the moving wheel is very nearly the same; in the reaction turbine the pressure at the inlet to the wheel blade is greater than the pressure at the outlet. The Parsons Turbine.--The principle of the single flow Parsons reaction turbine is illustrated in Fig. 129. The steam enters a governor valve, reaches the chamber I and passes out to the right through the turbine blades, eventually arriving at the exhaust chamber E. The areas of the passages increase progressively in volume, corresponding with the expansion of the steam. The rotating part of the turbine consists of a long drum upon which are mounted the moving blades. The stationary or guide blades are fitted in rings fastened to the turbine casing. On the left of the steam inlet are shown the revolving balancing pistons, one corresponding to each cylinder or section of the turbine. The steam at I presses against the turbine and goes through doing work. It also presses in the reverse direction, but cannot pass the piston, thus equalizing the pressure and reducing end thrust on the shaft. In most designs of Parsons turbines all the balancing pistons are at the pressure end of the turbine. In the Allis-Chalmers Parsons turbine the largest balancing piston is placed at the low pressure end of the rotating element behind the last row of blades. At T is shown a thrust bearing which serves to maintain the correct adjustment of the balancing pistons. Q is a pipe connecting the back of the balancing piston at S with the exhaust chamber E', to insure that the pressure at this point should be the...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.