DAT 400 wind

Slewing drive

The slewing drive DAT 400 wind is part of the Liebherr series-production for wind turbines. The gearbox size 400 can be designed with a short output shaft (design 1) or long output shaft (design 2) and is suitable for use as yaw and pitch gearbox.

metric

imperial

Reference output torque, dynamic - 38,200 Nm
38,200 Nm
Output torque Tmax - 78,600 Nm
78,600 Nm

Reference output torque, dynamic	38,200 Nm
Output torque Tmax	78,600 Nm
Areas of application	Wind energy
Gear transmission ratios (yaw)	960.0 / 1,004.3 / 1,090.2 / 1,162.5 / 1,237.5 / 1,443.8
Gear transmission ratios (pitch)	116.4 / 132.1 / 154.2 / 165.6 / 175.0 / 185.7 / 198.0 / 212.5

Variants

Type	Design 1	Design 2
Diameter of centering seat (mm)	365	290 / 390
External diameter (mm)	440	480
Pitch circle diameter (mm)	400	440
Housing diameter (mm)	380	380
Number of bolts	24	32
Diameter of bolts (mm)	22.0	22.0
Installation depth (mm)	90	305
Height of centering seat (mm)	17.0	15.0 / 60.0
Gearbox height (mm)	560	375
Flange height (mm)	131	20
Number of teeth (output pinion)	14	12
Gear module of output pinion	20	18
Height of output pinion (mm)	160	183
Weight (three-stage model) (kg)	465	345
Diameter of output pinion (mm)	340	270

Components for Wind Turbines

Slewing Drives for Wind Turbines

Yaw systems

Yaw gearboxes, so called wind tracking mechanisms, adjust the nacelle to the particular wind direction. In order to transmit the required high adjustment forces, the use of several slewing drives is recommended.

Pitch systems

Pitch gearboxes control the angles of attack of the rotor blades and adapt them to the variable wind speeds. For highest accuracy at rotor blade positioning, Liebherr offers slewing drives with reduced play upon request.

Slewing bearings

For over 70 years Liebherr has been manufacturing top-quality large diameter slewing bearings. Depending on requirements, various dimensions are available.

Contact

Please contact us – we will answer your questions and put together an individual offer for you. If you need a component as a spare part for your Liebherr machine, please contact your local service partner.

Swivelling drives

Liebherr develops special swivelling drives for applications which are exposed to high dynamic loading during the rotating movement (e.g. excavator).