1. Description
Water turbines are turbomachines which convert water energy into mechanical energy. Mostly, they are used for driving generators for power generation purposes. The Kaplan turbine is a reaction turbine with an axial through flow. It has a high specific speed and is suitable for large water Flows and small to medium heads., the Kaplan turbine is used as a "classic" water turbine in run-of-the-river power plants. The SR461 helps to investigate the characteristic behaviour of a simple-regulated Kaplan turbine during operation. The trainer is provided with a closed water circuit with tank, submersible pump and throttle valve for adjusting the flow rate. The angle of attack of the rotor, And thus the power output of the turbine, are changed by adjusting the guide vanes. The turbine is loaded with a wear-free eddy current brake.
The speed is captured by means of an inductive, non-contact position sensor at the turbine shaft. For determining the turbine power, the eddy current brake is equipped with a force sensor for torque measurement. The pressures at the inlet and outlet of the turbine 2. Technical details
Specification
Function of a Kaplan turbine
Closed water circuit with submersible pump, throttle valve and tank
Adjustment of flow rate with throttle valve
Loading the turbine by use of air-cooled eddy current brake
Rotor with fixed blades
Adjustable guide vanes for setting different angles of attack
Non-contact speed measurement at the turbine shaft and force sensor at the brake for measuring the torque
Digital display for pressures, temperature, flow rate, speed and torque
Technical data
Kaplan turbine
Max. output: 1000W
Max. speed: 3700min-1
Distributor
8 guide vanes, adjustable: -15°...45°
External Ø: 120mm,
Internal Ø: 60mm
Rotor, 4 blades, fixed
External Ø: 120mm,
Internal Ø: 60mm,
Pitch: 80mm
Submersible pump with motor
Max. flow rate: 250m3/h
Max. pump head: 11m
Nominal power: 3,1kW
Tank: approx. 350L
