Impeller - runner

Japanese: 羽根車 - はねぐるま(英語表記)impeller; runner
Impeller - runner
A rotating part with blades used in pumps, water turbines, etc. The impeller of a pump gives pressure and kinetic energy to a liquid by rotating, while the runner of a water turbine obtains mechanical energy by passing water with pressure and kinetic energy through it. Generally, the blades are set between two disks, but the shape varies depending on the purpose and is determined by the specific speed.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
ポンプや水車などに用いられる羽根をもった回転部品。ポンプの羽根車 impellerはこれが回転することにより液体に圧力および運動エネルギーを与えるもので,水車の羽根車 runner (ランナ) は圧力および運動エネルギーをもった水を通過させることにより,機械的エネルギーを得るものである。一般には2個の円板の間に羽根が設けられているが,その形状は目的によって異なり,比速度によって決る。

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