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發(fā)布時間: 2012-11-4 10:55
正文摘要:水環(huán)泵的性能特 圖示為一臺水環(huán)真空泵的性能曲線 特點(diǎn): 1.Qt要取決于葉輪的尺寸和轉(zhuǎn)速,ηv一般為0.65~0.82。 2.所能達(dá)到的壓力比取決于葉輪的結(jié) ... |
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