Gearbox (Gear Speed Reducer for Wind Turbines)

Gearbox  (Gear Speed Reducer for Wind Turbines)
Gearbox  (Gear Speed Reducer for Wind Turbines)
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Superior Performance
The NB700L4 yaw drive gearbox and pitch drive gearbox are used for different components of wind energy plants. This gear speed reducer for wind turbines is primarily responsible for the transmission of the rotor and the nacelle. Our slewing planetary gear units from the yaw and pitch range are normally used to control blade pitch for the turbines. The nacelle at the top of the tower is connected to the rotor and houses the gearbox, the electrical generator, the yaw system, and the control system. To make sure that the rotor axis is constantly aligned with the wind direction for maximum energy output, large wind turbines are equipped with a yaw system that allows the nacelle to adjust its position according to the direction and force of the wind. Nacelle rotation is controlled by a yaw system, planetary gear unit with electric brake motor.

Each wind turbine must have between two and six gear units, depending on the size, and the motor can be electric or hydraulic. Two or three-stage gear units, combined with a worm gearbox on the input side, or four or five-stage gear units from the yaw and pitch drive series are normally used. Output pinions can be integrated or inserted.

Key Features
1. Output torque range: 1000-80000 N.m
2. Gear Ratios: i=300-2000
3. Support: slew support (with flange mounted)
4. Electric Brake: DC and AC type
5. Output shaft: splined or with integral pinion; output shafts supported by heavy duty capacity bearings
6. Applicable motors: IEC electric motors

Product Identification Scheme
123456
NB706L41671IEC80B5

1. NB: Ningbo planetary gearbox
2. 706: Gearbox size, 700, 701, 703…715
3. L: L series slew drive
4. 4: Number of stages, 4…four stage
5. 1671: Ratio
6. IEC80B5: Motor type

TypeNominal Output Torque (N.m )Peak Static Output Torque (N.m )Ratio (i)
NB700L10002000297--2153
NB701L20004000297--2153
NB703AL25005000278--1866
NB705AL500010000278--1866
NB706BL4800015000203--2045
NB707AL41200025000278--1856
NB709AL41800030000278--1856
NB711BL43500080000256--1606
NB710L42500050000329--1420
NB711L43500080000256--1606
NB713L450000100000250--1748
NB715L480000140000269--1390
Specific Dimensions and Technical Parameters

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