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工作在低温和11,000磅/吋~2(773公斤/厘米~2)压力下的径向密封件对任何工程设计人员都存在一个难以解决的设计问题。在设计航天飞机主发动机涡轮泵组合件的耐低温试验设备时,解决耐低温、高压、径向密封问题己迫在眉捷。市售的密封件产品是不适用的,为此制定了研制这种密封件的计划。鉴定表明,至少有两种密封结构能满足使用部门某些要求或全部要求。其中一种是皮碗氟塑料密封,另一种是三角形聚四氟乙烯密封。两种密封都装有预载弹簧用于初始密封并在工作中施加压力。这两种结构,以三角形聚四氖乙烯密封较为理想。本报告将讨论密封设计参数,试验方法及其结果。
Radial seals that operate at low temperatures and pressures of 11,000 psi (773 kg / cm 2) have a hard-to-find design problem for any engineering designer. In the design of the space shuttle main engine turbo pump assembly low temperature test equipment, to solve the low temperature, high pressure, radial seal problem has been imminent. Commercially available seal products are not applicable and a plan was developed to develop such a seal. Identification shows that there are at least two types of seal structures that meet certain or all of the requirements of the service department. One of them is a cup of fluorine plastic seal, the other is a triangular PTFE seal. Both seals are equipped with a preloaded spring for initial sealing and pressure during operation. Both of these structures are ideal for triangular polytetrafluoroethylene sealing. This report will discuss seal design parameters, test methods and their results.