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利用螺旋槽轴承的“窄槽”理论,计算分析了螺旋槽上游泵送机械密封的开启力、摩擦功耗和上游泵送速率等性能,给出了可用于该类密封设计的计算式.“,”The characteristics, such as the open force, the friction power loss and the pumping rate of spiral groove upstream pumping mechanical seals are analyzed with the use of the narrow groove theory of spiral - groove bearings.The corresponent formulae that can be used for designing seals are presented in this paper.