Operating principle of a Pelton turbine laboratory equipment educational equipment teaching fluid mechanics lab equipment

Item No.: MR-HM 150.19
Operating principle of a Pelton turbine laboratory equipment educational equipment teaching fluid mechanics lab equipment
Description
MR-HM 150.19 Operating principle of a Pelton turbine laboratory equipment educational equipment teaching fluid mechanics lab equipment
Description
model of an impulse turbine
transparent operating area
adjustable nozzle cross-section
loading by band brake
Water turbines are turbomachines utilising water power. The Pelton turbine is a type of impulse turbine; such turbines convert the pressure energy of water into kinetic energy entirely in the distributor. During the conversion, the water jet is accelerated in a nozzle and directed onto the blades of the Pelton wheel tangentially. The water jet is redirected by approximately 180° in the blades. The impulse of the water jet is transmitted to the Pelton wheel.
MR-HM 150.19 is a model of a Pelton turbine demonstrating the function of an impulse turbine.
The experimental unit consists of the Pelton wheel, a needle nozzle used as distributor, a band brake for loading the turbine and a housing with a transparent front panel. The transparent cover enables to observe the water flow, the Pelton wheel and the nozzle during operation. The nozzle cross-section and thus the flow rate are modified by adjusting the nozzle needle.

The turbine torque is determined by force measurement on a band brake and is read on spring balances. For measuring the rotational speed, a noncontact speed sensor, e.g. MR-HM 082, is required. A manometer shows the water pressure at the turbine inlet.
The experimental unit is positioned easily and securely on the work surface of the MR-HM 150 base module. The water is supplied and the flow rate measured by MR-HM 150. Alternatively, the experimental unit can be operated by the laboratory supply.
Learning objectives/experiments
design and function of a Pelton turbine
determination of torque, power and efficiency
graphical representation of characteristic curves for torque, power and efficiency
Specification
[1] function of a Pelton turbine
[2] transparent front panel for observing the operating area
[3] loading the turbine by use of the band brake
[4] adjustable nozzle needle for setting different nozzle cross-sections
[5] marking on brake drum for non-contact speed measurement
[6] instruments: spring balances for determining the torque, manometer shows pressure at turbine inlet
[7] flow rate determination by base module MR-HM 150
[8] water supply using base module MR-HM 150 or via laboratory supply

Technical data
Pelton turbine
output: 5W at 500min-1, approx. 30L/min, H=2m
Pelton wheel
· 14 blades
· blade width: 33,5mm
· external Ø: 132mm
Needle nozzle
jet diameter: 10mm
Measuring ranges
force: 2x 0…10N
pressure: 0…1bar
LxWxH: 400x400x620mm
Weight: approx. 15kg
Required for operation
MR-HM 150 (closed water circuit) or water connection,drain
Scope of delivery
1 experimental unit
1 set of instructional material