Industrial shaft seals

gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21,
Industrial
факс
shaft seals
(495) 22
Wear sleeves
To seal efficiently, radial shaft seals must run
against a smooth round surface – the seal
counterface. If the counterface becomes worn,
and it usually does, then the seal will no longer
be able to fulfil its function, which is to retain
lubricant and to exclude contaminants – solid
particles, liquids as well as moisture.
Normally, the counterface will become
grooved as a contaminant particle is caught
under the seal lip and generates a track as the
shaft rotates. As this continues, the seal will
allow more particles to pass or get stuck, and
seal efficiency deteriorates, eventually leading
to malfunction of the component the seal is
meant to protect. To rectify the situation it is
necessary to repair the counterface on the
shaft – a simple seal replacement will not be
sufficient.
To repair the shaft it is usually necessary to
dismantle the machine in order to be able to
handle the shaft and then to grind down the
counter face until it is smooth again. If the
grooves are deep the original size of seal will
no longer function properly – a seal with a
smaller shaft diameter has to be found to
match it.
Now there is an easy way to repair the
counter face with the shaft still in position and
without having to look for a different size of
seal. The answer is wear sleeves from SKF.
SKF wear sleeves are available in two different
designs, depending on size. One is the
extremely thin-walled ”Speedi-Sleeve” (fig 75),
which allows replacement seals of the same
size as the original seals to be used. These
Speedi-Sleeves are produced for shaft
diameters up to and including 203 mm.
For larger shafts, up to approximately
1.150 mm in diameter, SKF produces the
LDSLV wear sleeves in two designs:
the LDSLV3 (fig 76) with a flange, and the
LDSLV4 (fig 77) without a flange.
Fig 75 Fig 76 Fig 77
gab.ru Берг АБ bergab@ya.ru Тел. (495)-228-06-21, факс 281 (495) 22