TKE TW45 - Gear efficiency

Technology
Mechanical data 35
TK Elevator
BA, TW45 | 6231003860 | 03/2023
TW45C with horizontal motor position
▪ Horizontal rope pull: Ft
zul-stat
= 94 kN ≤ Ft
stat-max
▪ Upward vertical rope pull: Ft
zul-stat
= 70 kN ≤ Ft
stat-max
The load Ft
stat-max
present for the static overload case is determined via the TK-
LiftDesigner, etc.
The values for upward horizontal and/or vertical rope pull directions can be
used up to +/- 45° respectively for rope pull directions between upward hori-
zontal and vertical.
45°
45°
Fig.14 ATR_2_12_0168_0
For installations on which Ft
stat-max
is > Ft
zul-stat
, the permitted load and possible
constructive measures must be clarified with TK Aufzugswerke GmbH on re-
quest.
4.1.9 Gear efficiency
The specified gear efficiencies η
G
and η
G´
are extreme values which are to be
applied for dimensioning the motor, frequency inverter and braking resistor,
etc. The rated efficiency η
n
provides information on the value η
G
that can be
achieved under optimum operating conditions.
The efficiencies η
an
and η
an'
describe the state of gear starting (overcoming
static friction or build-up of lubricating film in the gear teeth; with η
an
values <
0.5 - the gear, when stopped, must be viewed as self-inhibiting).
▪ η
g
: minimum design efficiency, driving
▪ η
g´
: maximum design efficiency, driven (braking)
▪ η
n
: rated efficiency - driving
▪ η
an
: starting efficiency – driving
▪ η
an'
: starting efficiency – driven
Ratio / η
g
η
g'
η
n
η
an
η
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