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離心泵在啓(qǐ)動(dòng)時(shí)爲什麽要充滿水？

離心泵(bèng)在啓動前，首先要(yào)充滿水(shuǐ)，以排出泵殼内(nèi)的空氣。由 離心泵 的工作原理可知，葉輪旋(xuán)轉時，水受離心力作用而被(bèi)甩向葉輪外緣，葉輪中心處形成真空，水被(bèi)吸入，形成水泵的連續工作(zuò)過程。如果啓動時泵體内不是充滿水，而是充滿空氣，由(yóu)于空氣密度(dù)遠(yuǎn)遠小于水的密(mì)度，在葉輪(lún)以同樣的速度旋轉時，空(kōng)氣産生的離心力将遠小于水(shuǐ)的離心力。這樣會集聚在葉輪中心，使葉輪中心不能形成足夠的真空，妨礙水的吸入，影響水泵連續工作過程的形成。因此， 離心泵 在啓動(dòng)前，必須首先充滿水，排淨泵體内的空(kōng)氣，才能維持水泵的正常工作(zuò)(圖\文 xiaojikuaipao.top/ )。
中譯英：
Centrifugal pump before starting, must first be filled with water, to remove the pump casing of air. By the principle of centrifugal pump impeller rotates, the water that, by centrifugal force and is thrown to the outer edge of the impeller, the impeller center of vacuum, the water is sucked into the pump, forming a continuous working process. If you start the pump body is filled with water, but is filled with air, the air density is much less than the density of the water, the impeller to rotate at the same speed, air to generate centrifugal force is far less than that of water by centrifugal force. It will gather in the center of the impeller, the impeller center of the vacuum can not form enough, the way of water suction pump, continuous working process of formation. Therefore, the centrifugal pump before starting, must first be filled with water, drain the air inside the pump body pump, to maintain the normal work.

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