Shaft sealing assembly

摘要

A shaft sealing assembly (11) seals a rotary shaft (15) of a refrigerant compressor with a first sealing member (21), which is a lip seal. The first sealing member (21) has a hollow portion. As the pressure in the interior space of the compressor housing (13) increases, an outer wall surrounding the hollow portion (51) is elastically deformed. Accordingly, a lip portion of the first sealing member (21) receives a tension that weakens a force pressing the lip portion against the rotary shaft (15). Therefore, the sealing assembly (11) improves the durability of the lip portion and maintains a satisfactory property of the lip portion to follow displacement of the rotary shaft (15) at the same time. <IMAGE>