TRAINING OBJECTIVES
• Characteristic curves of the turbine with constant values of H and Q:
– Torque – speed (M -n)*
– Brake power – rotational speed (Pe-n)*
– Performance – rotational speed (ƞ- n)*
• Curves of Iso-yield.
The braking system is composed of dynamometers that allow that allow the running at different speed depending on the applied braking force.
This force can be easily read on the dynamometers included in the didactic trainer.
TECHNICAL DATA
Manometer
• Bourdon type with glycerin 0-25 M WC
Turbine
• Number of fixed fins: 12.
• Number of inlet guide fins: 6 (from 0 to 100% adjustable)
• Impeller diameter 124 mm.
• Material: bronze
• Rated speed 2,000 rpm
Dynamometers
• 2 x dynamometers: 2kg x 10g
Inner diameters:
• Discharge pipe: Inner Ø=27.2mm
• Suction pipe: Inner Ø=27.2mm
FRANCIS TURBINE – BRAKE FRICTION
This trainer can simulate a small scale Francis turbine, especially designed for educational purposes. It grants the possibility to constantly observe the system operation and its main components.
The turbine housing is partially transparent so that it can be seen how the water flow rotates the impeller.
Moreover the movement of the fins guide of the distributor can be observed with which the flow regulation of the inlet turbine is achieved.
In addition, it can be visualized the impact of the fluid on the fins and perform specific measurements.
The module has an inlet regulating valve allowing the working with different flow rates and granting the performing of many exercises.
The inlet pressure of the turbine can be studied in the given manual, by using a Bourdon gauge included in the equipment.
