SIEMENS
Introduction
General technical data
1/9
Siemens D 86.2 · 2007
1
■
Mechanical design
Rotor construction
The rotor is fitted with permanent magnets. The magnets are
integrated in the rotor and potted in resin.
For rotors
installed
in motors, a magnetic field cannot be
detected externally.
Bearings and lubrication
The HT-direct motors are equipped as standard with one deep-
groove ball bearing at DE and NDE installed in the bearing hous-
ing.
The DE bearing is responsible for axial guiding of the rotor
(so-called fixed bearing).
The NDE bearing is installed as a floating bearing with axial
clearance in the electrically insulated bearing housing. Axial
pressure springs that act on the outer ring of the deep-groove
ball bearing ensure backlash-free and smooth running of the
motor.
The roller bearings are greased and are equipped with a re-
greasing device. The grease type, quantity and relubrication
intervals are stated on the lubrication plate of the motor.
The calculated bearing lifetime is 60000 operating hours in S1
duty provided that the instructions for lubrication on the lubrica-
tion plate of the motor are complied with. In practice, however,
the bearing lifetime is frequently longer than this.
The compartment for storing the old grease must be sufficiently
large to allow an operating time of > 60000 hours.
The requirements of the marine classification societies (Germa-
nischer Lloyd, DNV, BV, LRS,ABS, CCS) are fulfilled, i.e. angular
displacement is permitted in every direction up to 15° static and
22° dynamic. The requirement must be ordered with the appro-
priate E.. order code.
Measuring nipples are screwed into the bearing housing as
standard for bearing monitoring based on the shock-pulse
method.
Bearing at DE (fixed bearing)
Bearing at NDE (floating bearing):
Electrically insulated bearing cartridge, backlash-free adjusted deep-
groove ball bearing
Standard bearing arrangement
Changing the bearing
It is possible to change the bearings on site. Please contact your
local Siemens sales representative regarding this.
Max. motor speed
The motors can be operated up to 20% above the rated speed.
Danger:
The magnetic field from a
disassembled
rotor can cause
injury or damage to health if inappropriate tools are used.
Installation and disassembly of the rotor is therefore only per-
mitted to be performed at the manufacturer site.
G_D086_XX_00008
Frame size
Drive end
DE bearing
Non-drive end
NDE bearing
40.
6232 C3
6228 C3
45.
6236 C3
6232 C3
50.
6240 C3
6236 C3
Insulating washer
Insulating tube
Insulating ring
Plain washer
of insulating material
G_D086_EN_00009