Technology
Mechanical data
45
TK Elevator
BA, TW45C | 6231003860 | 06/2022
4.1.10
Gear efficiency
The specified gear efficiencies h
G
and h
G´
are extreme values which are to be
applied for dimensioning the motor, frequency inverter and braking resistor,
etc. The rated efficiency h
n
provides information on the value h
G
that can be
achieved under optimum operating conditions.
The efficiencies han and han' describe the state of gear starting (overcoming
static friction or build-up of lubricating film in the gear teeth; at h
an
- values <
0.5 - the gear, when stopped, must be viewed as self-inhibiting).
▪
h
g
: minimum design efficiency, driving
▪
h
g´
: maximum design efficiency, driven (braking)
▪
h
n
: rated efficiency - driving
▪
h
an
: starting efficiency – driving
▪
h
an'
: starting efficiency – driven
Ratio /
h
g
h
g'
h
n
h
an
h
an
'
Speed (rpm)
800 -
1249
1250
-1800
800 -
1249
1250
-1800
1250
-1800
-
-
46:1
0.68
0.70
0.70
0.72
0.73
0.39
-0.08
32:1
0.72
0.74
0.74
0.76
0.77
0.46
0.18
41:2
0.80
0.82
0.82
0.84
0.85
0.56
0.47
40:3
0.86
0.88
0.88
0.90
0.91
0.66
0.66
32:3
0.87
0.89
0.89
0.91
0.92
0.67
0.67
4.1.11
Mass moment of inertia
Location
J
rot
Machine room
Shaft headroom
Machine
Shaft pit
Assembly, TW45C winch
1)
(kgm
2
)
0.0045
x
x
x
Motor 5.2 kW
(kgm
2
)
0.018
x
x
Motor 7.0 kW
(kgm
2
)
0.024
x
Handwinding wheel D270
(kgm
2
)
0.01
x
Assembly, entire machine
(kgm
2
)
-
0.0325
0.0225
0.0285
Tab. 15
ATR_1_21_0049_0
The following values for the machine apply to the ISIS1 versions depending on
the motor construction size:
▪
E 5.5 J
rot
= 0.028 kgm2
▪
E 7.5 J
rot
= 0.036 kgm2
▪
E 11.0 J
rot
= 0.040 kgm2
The mass moment of inertia for versions of the machine not listed in the table
is to be determined according to the details of the individual components.
