gBOX4.5
Cost-efficient performance
The 4.5MW gBOX4.5 platform proves we have the knowledge, experience, and resources to develop gearboxes that optimize the torque to mass ratio. By means of its innovative modular design and technology, maximum reliability and compliance with the most demanding standards are ensured.
Design and validation concepts applied to the gBOX4.5 development, only comparable to those used in demanding industries, such as aerospace, enable us to assure gearbox reliability from the first day in operation.
The main features of the gBOX4.5 platform are:
- 2-stage (plus a high-speed module) compact drivetrain with main shaft transmitting bending
moments to the main frame - all gears1 made from high grade alloy steels
- structural castings made from high quality spheroidal graphite iron
- lubrication by splash and electrical pump injection – oil bath ensures all gears, bearings & splines are lubricated during grid loss conditions
The gBOX4.5 platform, nowadays used in the Gamesa G128 Class IIA, G132 Classes III/S wind
turbines, provides clear evidence of the platform’s reliability, ease of assembly and operation, and
state-of-the-art technologies becoming reality.
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General details
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gBOX–4.5i38
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Rated power[kW]4500
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Ratio–37.88:1
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Input torque[kNm]3926
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Input speed[rpm]11.83
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Oil type–ISO VG 320
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Oil fill quantity2[litre]700
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Dry mass3[kg]35096
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Overall dimensions4[mm]2540/2985
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Bearing arrangement5
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Low-speed shaft & intermediate-speed planet shaftTwo rows of integrated tapered (or cylindrical) roller bearings in O-configuration
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Intermediate-speed shaftDeep groove ball bearing
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High-speed shaftTwo tapered roller bearings in O-configuration
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1Two planetary stages, spur geared 1st stage and helical geared 2nd stage
2Including external oil tank
3Gearbox mass only
4Diameter/Length (gearbox only)
5Shaft designations according to IEC61400-4
