Gear Speed Reducer for Wind Turbines Planetary Gearbox

Superior PerformanceThe replacement of the NB700L4 yaw drive gearbox and pitch drive gearbox is 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, a planetary gear unit with an 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 Features1. Output torque range: 1000-80000 N.m2. Gear Ratios: i=300-20003. Support: slew support (with flange-mounted)4. Electric Brake: DC and AC type5. Output shaft: splined or with integral pinion; output shafts supported by heavy-duty capacity bearings6. Applicable motors: IEC electric motorsProduct Identification Scheme

1	2	3	4	5	6
NB	706	L	4	1671	IEC80B5

1. NB: Ningbo planetary gearbox2. 706: Gearbox size, 700, 701, 703…7153. L: L series slew drive4. 4: Number of stages, 4…four stage5. 1671: Ratio6. IEC80B5: Motor typeedited by CX

Type	Nominal Output Torque (N.m )	Peak Static Output Torque (N.m )	Ratio (i)
NB700L	1000	2000	297--2153
NB701L	2000	4000	297--2153
NB703AL	2500	5000	278--1866
NB705AL	5000	10000	278--1866
NB706BL4	8000	15000	203--2045
NB707AL4	12000	25000	278--1856
NB709AL4	18000	30000	278--1856
NB711BL4	35000	80000	256--1606
NB710L4	25000	50000	329--1420
NB711L4	35000	80000	256--1606
NB713L4	50000	100000	250--1748
NB715L4	80000	140000	269--1390