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1. 发明申请

US20090140495A1 Shaft Seal 审中-公开
标题翻译：轴封
公开(公告)号：US20090140495A1
公开(公告)日：2009-06-04
申请号：US11887601
申请日：2006-03-30
申请人： Thomas Dreifert , Wolfgang Giebmanns , Bernhard Kliem , Heinz Thoren
发明人： Thomas Dreifert , Wolfgang Giebmanns , Bernhard Kliem , Heinz Thoren
IPC分类号： F16J15/447
CPC分类号： F16J15/406 , F04C18/16 , F04C27/009 , F04D29/104
摘要： A shaft seal which is in particular suitable for vacuum pumps, such as screw pumps, comprises an inner sealing ring (18) connectable with the shaft, and an outer sealing ring (20) surrounding said inner sealing ring (18). In the outer sealing ring (20) a circumferential groove (30) is provided into which seal gas is adapted to be fed via a feed channel (22). Further, a seal gas disk (34) is connectable with the shaft (10), the seal gas disk (34) comprising a projection (32) extending towards said groove (30). Thereby a seal gas chamber (28) is defined in the groove (30). The seal gas chamber (28) is connected with a sealing gap (40) provided between the inner and the outer sealing ring (18,20) via a chamber gap (36), through which the seal gas is adapted to flow. Adjacent to the sealing gap (40) a separating chamber (42) defined by the inner and the outer sealing ring (18,20) is arranged, the separating chamber (42) being connected with a discharge channel (44) for the purpose of discharging the seal gas.
摘要翻译：特别适用于诸如螺杆泵的真空泵的轴密封件包括可与轴连接的内密封环（18）和围绕所述内密封环（18）的外密封环（20）。在外密封环（20）中，设置有周向槽（30），密封气体适于经由供给通道（22）进给。此外，密封气盘（34）可与轴（10）连接，密封气盘（34）包括朝向所述槽（30）延伸的突起（32）。因此，在槽（30）中限定密封气室（28）。密封气室（28）通过室间隙（36）与设置在内密封环（18,20）和外密封环（18,20）之间的密封间隙（40）连接，密封气体可以通过该间隙流动。在密封间隙（40）的邻近处设置有由内密封环（18,20）和外密封环（18,20）限定的分离室（42），分离室（42）与排出通道（44）连接，排出密封气体。

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