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日本人设计的立式往复式真空泵采用较小的相对余隙容积（ａ＝０．０１５～０．０２５），不采用平衡道；我国温州工业泵厂研制生产的ＷＬ型泵采用了平衡通道，但取了较大的相对余隙容积（ａ＝０．０７）。本文从理论上分析了上述二种方法对往复式真空泵真空度的影响，并提出了既开平衡通道、又尽可能减小余隙容积来提高真空度的设计方法，经对所设计的ＬＶＰ型泵的测试，真空度为１３０６Ｐａ，达到国内外先进水平
Japanese-designed vertical reciprocating vacuum pump with a relatively small clearance volume (a = 0.015 ~ 0.025), do not use balance Road; China’s industrial pump plant in Wenzhou, developed and developed by WL pump balanced channel, But took a larger relative clearance volume (a = 0.07). In this paper, the influence of the above two methods on the vacuum degree of the reciprocating vacuum pump is theoretically analyzed, and a design method is proposed to increase the degree of vacuum by opening a balanced channel and reducing the clearance volume as much as possible. After designing the LVP Pump test, the degree of vacuum 1306Pa, reached the advanced level at home and abroad