| 摘要 |
<p>A shaft seal includes at least first (26) and second (28) annular land members that are located on a shaft (16) and extending toward the housing, an annular spacer member (38) positioned on the shaft between the land members (26, 28), a generally annular seal member (48) frictionally engaging the housing (12) and located between the land members. The arrangement is such that changes in axial dimension of the shaft (16) will cause the land members to reposition the seal member (48) and thus maintain an effective seal between the shaft and the housing.</p> |
