| 摘要 |
<p>A mechanical seal arrangement 20 for use in association with a pump casing structure 20.1 and a drive shaft 22 for driving a pump impeller 23 which is housed in the pump casing structure, is disclosed, the seal arrangement comprising: a rotatable seal ring 24 having a seal face 25 mountable concentrically on the drive shaft 22 for rotation with the drive shaft 22; a non-rotatable seal ring 26 having a seal face 27 mountable in axial alignment with the rotatable seal ring assembly; and biassing means 38 for urging the rotatable and non-rotatable seal rings 24 and 26 axially towards each other for effecting sealing engagement of the seal faces of the respective seal rings. The biassing means 38 comprises at least two disk spring elements (29.1,34.1) spaced apart and encapsulated in an elastomeric body. The biassing means is in use in a tensioned state between either one of the seal rings and the pump casing structure.</p> |
