Banki - Cross Flow Hydro Turbines
IREM Ecowatt Hydro Banki (cross flow) turbines are suitable for heads from 5 m to 50 m and effective flow rates ranging from 10 l/s to 1000 l/s. The water wheel and mechanical parts are made of stainless steel. The transmission of the motion between wheel and generator is entrusted to a cogged driving belt, which ensures the necessary flexibility of the system and optimizes the transmission itself.
AISI 316/I stainless steel crossflow wheel is formed by blades, which are directly welded on the side plates. The shaft is fixed to the wheel by means of two conic section pliers. The shaft revolves on watertight ball bearings external to the turbine case. A revolution multiplier fitted with cogged driving belt transmits the motion to the generator. In these water turbines the flow rate is controlled by a special floodgate, which allows variations from 0 to 100%. The operation may be either manual or automatic through electric servomotor.
The feeding group connects the penstock to the turbine case. The throttle valve and the connection for the pressure gauge are mounted on the feeding group. The throttle valve may be operated manually or through a pneumatic or electric actuator.