Mavel Kaplan BULB Turbine
Technical Specification
The gears and bearings are designed for more than 100,000 hours of service life under full load
continuous operation. The bearings are equipped with Pt100 temperature sensors. The gearbox design
considers a 2.0 operational factor.
1.9.1 Lubrication and Cooling System of the Gearbox
This system ensures the lubrication and cooling of the bearings and gears of the gearbox. This system is
placed on the turbine floor. The heat generated by the gearbox is removed by means of oil/air heat
exchanger. The system ensures the following functions:
- Cooling and lubrication of the gears and bearings of the gearbox.
- Filtration of the lubrication oil.
- Cooling of the heated lubrication oil.
The lubrication and cooling system is closed loop. There is a oil/air heat exchanger, which part of
lubrication unit.
1.10 Shaft Couplings
Couplings between the turbine and gearbox shaft, and the gearbox generator shaft will be friction clutch
type. This will allow slippage of one shaft with respect to the other in the event of overload of design
torque (short circuit load).
1.11 Brake
The unit is supplied with a single hydraulically controlled disk brake. The braking disk is placed on the
generator shaft, being firmly attached to the shaft with the necessary bolts and screws.
2 GUARANTEED PARAMETERS
2.1 Guaranteed power
MAVEL guarantees that the maximum power on turbine shaft shall not be lower than that one specified
in the List of Guaranteed parameters, corresponding to its given net head and discharge taking into
account p-g value. If necessary, corrections in the power for variations in head or discharge will be
performed in accordance with the IEC 60041.
The guaranteed power can be verified in tests performed on the unit to be supplied in accordance with
recommendations of IEC Code, Publication 62006, Class A. “Hydraulic machines — acceptance tests of
Small Hydroelectric Installation”.
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