離(lí)心泵在(zài)啓動(dòng)前，首(shǒu)先要(yào)充(chōng)滿水，以排出(chū)泵殼内的空氣(qì)。由 離心泵(bèng) 的工作原理可知，葉(yè)輪旋轉時(shí)，水受(shòu)離心力作用而(ér)被甩向葉輪外(wài)緣，葉輪中心處(chù)形成真(zhēn)空，水被(bèi)吸入(rù)，形成(chéng)水泵的連續工(gōng)作過(guò)程。如果啓(qǐ)動時(shí)泵體内不(bú)是充滿水，而是充滿(mǎn)空氣，由于(yú)空氣(qì)密(mì)度遠遠(yuǎn)小于水的密(mì)度，在葉(yè)輪以同樣(yàng)的速度旋轉時，空氣(qì)産生(shēng)的(de)離(lí)心力(lì)将遠小于水的(de)離心力(lì)。這(zhè)樣會(huì)集聚在葉(yè)輪中(zhōng)心，使葉輪(lún)中心不能(néng)形成(chéng)足夠(gòu)的真空，妨(fáng)礙水(shuǐ)的吸入(rù)，影響(xiǎng)水(shuǐ)泵連續工(gōng)作過(guò)程的形成。因此(cǐ)， 離心泵(bèng) 在啓動前，必(bì)須首先充(chōng)滿水(shuǐ)，排(pái)淨(jìng)泵(bèng)體(tǐ)内的(de)空氣(qì)，才能(néng)維持水泵(bèng)的正(zhèng)常工(gōng)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.