Industrial shaft seals

gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21,
Industrial
факс
shaft seals
(495) 22
Oil retention
Lubricating oils, particularly relatively lowviscosity
oils, are much more difficult to retain
in a bearing arrangement than greases.
Therefore, spring-loaded radial shaft seals are
used almost exclusively, e.g. SKF seals of the
CRW1 (fig 4), HMS5 (fig 5) or HDS3 designs.
For very arduous conditions where
circumferential (peripheral) speeds are
relatively low the HDDF (fig 6) mechanical
seals are also suitable for oil retention.
Normally, CRW1 radial shaft seals with the
hydrodynamically formed Waveseal lip are
adequate. The Waveseal lip has a sinusoidally
formed lip edge which produces a pumping
action to the inside as well as the outside,
irrespective of the direction of rotation of the
shaft (or the housing). When it is desired to
protect the sealing position against dust or fine
solid contaminants, it is recommended to use a
radial shaft seal with a secondary (dust) lip,
e.g. of the CRWA1 design.
V-ring seals (fig 7) may also be used to
retain oil. In this case they should be arranged
on the oil side and should be axially supported
on the shaft.
Fig 4. CRW1 seal
Fig 5. HMS5 seal
Fig 6. HDDF mechanical seal
Fig 7. V-ring seal
gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс (495) 15 22