Mechanical Properties; Shaft Sealing Ring - Siemens SINAMICS S120M Manual

S120M

4.3 Mechanical properties

4.3 Mechanical properties
4.3.1

Shaft sealing ring

Protection against water alone is not adequate for cooling-lubricating mediums that contain
oil, can creep and/or are aggressive. The S120M component must be protected by using
suitable covers. Attention must be paid to providing suitable sealing of the motor shaft for the
selected degree of protection for the motor.
Table 4- 1
Degree of
protection at
shaft sealing
ring acc.
to EN 60034-5
IP65
IP67
72
Sealing of the motor shaft
Shaft sealing
Radial shaft sealing ring
without annular spring
Radial shaft sealing ring
Area of application
Shaft outlet seal to protect against spray water
and cooling-lubricating medium. It is permissible
that the radial shaft sealing ring runs dry.
Service life: approx. 25000 h (nominal value).
It is not permissible for liquid to collect in the
flange.
Version, shaft outlet + flange: IP67 (optional)
For gearbox mounting (for gearboxes that are not
sealed) to seal against oil.
The sealing lip must be adequately cooled and
lubricated by the gearbox oil in order to guarantee
reliable function.
Service life: approx. 10000 h (nominal value)
If a radial shaft sealing ring runs dry, then this has
a negative impact on its functionality and the
lifetime.
SINAMICS S120M Distributed Drive Technology
Manual, (GH12), 12/2014, 6SL3097-4AW00-0BP3