Pressure stage

Japanese: 圧力段 - あつりょくだん
Pressure stage

...Steam turbines do not have much torque, but they can produce a lot of power by rotating at high speeds. This characteristic made them ideal as prime movers for driving generators, and their development coincided with the beginning of the use of electricity and the expansion of demand for it.
[Operating principle and format]
The basic components of a steam turbine are the nozzle, which expands the steam into a high-velocity stream, and the rotor blades, which do the work. This set is called a pressure stage, or simply a stage, and is essentially represented in Figure 1. Large turbines consist of many stages.

From [Turbine]

…The fluid expands in a passage fixed to the casing, forming a high-speed jet, which is designed to be blown just right against the rotating blades. In this way, the part fixed to the casing that creates the high-speed flow and the row of rotating blades work together to form the basic element that generates work, and are called pressure stages. Even with a large pressure difference, it is possible to extract work by successively reducing the pressure by placing multiple pressure stages. …

*Some of the terminology that refers to "pressure stage" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…蒸気タービンはトルクはあまり大きくないが,高回転数とすることにより大きい出力を出せるという特徴をもっており,この特徴が発電機駆動用原動機としてうってつけのものであったため,その進歩はまさに電力使用の始まりとその需要の拡大と軌を一にしている。
[作動原理と形式]
 蒸気タービンの基本構成要素は,蒸気を膨張させて高速気流とするノズルと,仕事を行う回転羽根であり,この1組を圧力段,あるいは単に段と呼び,本質的には図1で代表される。大型タービンは多数の段から構成される。…

【タービン】より

…流体は車室に固定して設けられた通路で膨張して高速の噴流となり,ちょうどうまく回転羽根に吹きつけるように作られている。このように,車室に固定され高速流を作る部分と回転羽根列とが1組となって仕事を発生する基本要素を構成し,圧力段と呼ばれる。大きい圧力差でも,複数の圧力段をおくことによって,圧力を順次落として仕事をとり出すことが可能である。…

※「圧力段」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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>>:  Pressure loss - Pressure loss

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