MAAG PU planetary gearbox series

Designed as speed increaser in Kaplan bulb turbines to drive a generator or as speed reducer to drive pumps

  • Description

Technical data

PU Gearboxes are purely planetary gearboxes designed for the specific use as speed increaser in Kaplan bulb turbines to drive a generator or as speed reducer to drive pumps.

Range
The actual range of PU gears is designed as single stage planetary gear unit in different sizes covering power ranges from 1 of up to 12 MW with an overall ratio (i) of approx.. 7.5 to 9:1 (adaptable at request). The APU Series (APU-74 W and 84 W) are equipped with semi hydrostatic axial sleeve bearings able to absorb thrust loads of up to 1600kN.

The alternative is the PUVA3 Series designed as speed reducer with axial sleeve bearing to absorb thrust loads from the turbine.

Features
Sun pinion and planet wheels made of alloy steel case hardened and ground with the necessary longitudinal and profile modification. Annulus made of heat-treated steel with accurately cut teeth. All shafts are bedded on abundant dimensioned hydrodynamic sleeve bearings. The sturdy design covers main requests of highest compactness, small foot print and highest longevity of gears and bearings. 

Application field

Hydro

  • Radial flow turbines
  • Water pump
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