| 摘要 |
Seal unit for enclosing a radial gap between coaxial, relatively rotatable inner and outer members, preferably a bearing in a pump. The unit comprises a seal element 30 which has an elastomeric seal body 35 comprising a radial seal lip 36 that bears against a counterface on a cylindrical portion 25 of the flinger element. The flinger element further comprises a flange portion, having a first section 26 that extends in a purely radial direction from the cylindrical portion 25 and further comprises a second section 27 that extends from the first section 26 in an axially inward direction at an angle of between 10 and 80 degrees relative to a rotation axis of the unit. The elastomeric seal body further comprises a non-contact seal portion 38, which has a first surface 41 and a second surface 42 which respectively face the first and second sections 26, 27 of the flange portion, and which present an essentially constant gap G thereto of less than 1 mm, forming a labyrinth seal. Thus hindering entry of contaminants, particularly water, and optimising expulsion of any contaminants that penetrate the seal through the gap G. |
