72 - PVD 3622_GB_TM_January 2014.Docx
3.5. Shaft Loads
3.5.1.
Extra protection against bearings currents
An extra protection against bearings currents is available under request. That can
reduce the shaft voltages by a factor 10, reduce the bearings currents and extend the
bearings life time as well.
3.5.2.
Vibration resistance to shaft end
Frequency domain :10 to 55 Hz according to EN 60068 -2-6
Vibration resistance to the shaft end :
- radial 3 g
- axial 1 g
3.5.3.
Motors with Thrust Bearings
As standard, TM Torque Motors are equipped with integrated spherical roller thrust
bearings from SKF Explorer range.
The following tables give expected bearing lifetimes and regreasing intervals at 70°C
and at various speeds for different axial dynamic bearing load, calculated using the
following formula according to ISO281 and SKF recommendations:
3
10
6
60
10
P
C
n
Ln
Ln
= Thrust bearing life time,
hours
C
= Basic dynamic load rating,
kN
n
= Rotational speed,
r/min
P
= Equivalent dynamic bearing load,
kN
Thrust
Bearing
Availability
Basic
dynamic
load (kN)
TMW20
1 2 3 4 5 6 7 8 9 A B C
29420
S S S S S
980
29424
O O O O O
1370
TMW30
1 2 3 4 5 6 7 8 9 A B C
29422
S O O O O O
1180
29426
O S S S S S
1560
29430
O O O O O O
1860
TMW40
1 2 3 4 5 6 7 8 9 A B C
29430
S
O O
O
1860
29434
O
S S
S
2360
29440
O
O O
O
3200
S = Standard, O = Optional
For extruder application, a raw estimation of axial load can be calculated with
following formula
40
.
.
2
D
P
F
e
A
F
A
: Axial Load,
N
D
: Extruder screw diameter,
mm
P
e
: Pressure on extruder screw,
Bar
Example :
For a pressure of 300bars and an extruder diameter of 50mm, the axial
load is 58.9kN
Содержание TM Series
Страница 1: ...1 PVD 3622_GB_TM_January 2014 Docx Torque Motors TM Series Technical Manual PVD 3622...
Страница 57: ...57 PVD 3622_GB_TM_January 2014 Docx 3 3 1 2 Shaft Height 200 mm Thrust bearing 29424...
Страница 58: ...58 PVD 3622_GB_TM_January 2014 Docx 3 3 1 3 Shaft Height 200 mm Without Thrust Bearing With Ball Bearing...
Страница 59: ...59 PVD 3622_GB_TM_January 2014 Docx 3 3 1 4 Shaft Height 200 mm Without Thrust Bearing With Roller Bearing...
Страница 61: ...61 PVD 3622_GB_TM_January 2014 Docx 3 3 2 2 Shaft Height 315 mm Thrust Bearing 29426...
Страница 62: ...62 PVD 3622_GB_TM_January 2014 Docx 3 3 2 3 Shaft Height 315 mm Thrust Bearing 29430...
Страница 63: ...63 PVD 3622_GB_TM_January 2014 Docx 3 3 2 4 Shaft Height 315 mm Without Thrust Bearing With Ball Bearing...
Страница 64: ...64 PVD 3622_GB_TM_January 2014 Docx 3 3 2 5 Shaft Height 315 mm Without Thrust Bearing With Roller Bearing...
Страница 66: ...66 PVD 3622_GB_TM_January 2014 Docx 3 3 3 2 Shaft Height 400 mm Thrust Bearing 29434...
Страница 67: ...67 PVD 3622_GB_TM_January 2014 Docx 3 3 3 3 Shaft Height 400 mm Thrust Bearing 29440...
Страница 68: ...68 PVD 3622_GB_TM_January 2014 Docx 3 3 3 4 Shaft Height 400 mm Without Thrust Bearing With Ball Bearing...
Страница 69: ...69 PVD 3622_GB_TM_January 2014 Docx 3 3 3 5 Shaft Height 400 mm Without Thrust Bearing With Roller Bearing...