/ES4__Doujak

DEVELOPMENT, SIMULATION AND STRESS ANALYSIS OF A ROPE TRASH RAKE MACHINE FOR SMALL HYDROPOWER PLANTS

by Dr. E. Doujak Hidroenergia 2006

Content ¾ General Overview ¾ Construction of a 3D model based on the 2D drawings of the original model ¾ Parameterisation of the 3D model ¾ Simulation with CosmosMotion© ¾ Performance of a finite element analysis to test the feasibility of the model under different working conditions Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.2

General Overview • Trash rake cleaning • Debris handling • Additional function

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.3

General Overview

Robotic rake

Grab-and-Lift cleaner

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Coanda screen Hidroenergia 2006 06.01.4

KßnzŠ

General Overview

Hydraulic jib system

Rope trash rake machine Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.5

Advantages versus disadvantages Rope operated machines:

Hydraulic jib machines:

For a wide number of intakes due to the Intakes with difficult laying debris greater cleaning performance For narrow deck area

For extreme compacted floating debris

For intakes with inclination larger than 8 degree angle

For decks with sufficient space for rotating

On existing rail tracks

For rack inclination up to vertical

For deep intakes

Cleaning depth smaller than 32 m Deck with sufficient structure due to the forces on the rail system

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.6

Rope trash rake machine

Radhuber ConsultingŠ

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.7

3D Model

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.8

Parameterisation The question is : „Why do we have to parameterise the modell?“ The answer is : In a nonparametric modeller, the geometry drives the dimension; in a parametric modeller, the dimension drives the geometry.

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.9

Parameterisation Parameters User defined

Model defined

external

internal

Inclination of the trash rake Width & Depth of the channel

Beam size & thickness Shaft diameter & thickness Rope diameter Plate thickness

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.10

Simulation The simulation was done with CosmosMotionŠ, which is a part of the SolidWorksŠ package, to simulate the Motion, Forces and Moments of an Assembly.

Actually the tool is not fully developed for that application so that we had some bigger troubles to do the simulation.

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.11

Simulation Out of this simulation we can get for example the bending moments of the shaft.

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.12

FE-Analysis (examples) Comparison of the results Simulation

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Manual calculation

Point 21 N/mm² C

22.2 N/mm²

Point 2.8 N/mm² A

2.4 N/mm² Hidroenergia 2006 06.01.13

FE-Analysis (examples)

vonMises stress mid section [MPa] Simulation

Manual calculation

50 N/mm²

53 N/mm²

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.14

FE-Analysis (examples) Deformation analysis

Stress analysis Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.15

Thank Thank you you for for your your attention attention !!!!

Institute for Waterpower and Pumps Vienna University of Technology Karlsplatz 13/305 A-1040 Vienna / AUSTRIA Tel: +43/1/58801 – 30515 Fax: + 43/1/58801 – 30599 http://info.tuwien.ac.at/wup/ Email: eduard.doujak@tuwien.ac.at Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.16

The Institute for Waterpower and Pumps at the Vienna University of Technology (Austria) organizes this year the 14th International Seminar on Hydropower Plants

„Worldwide use of Hydropower in the future“ 22.11. – 24.11.2006 Vienna, Austria http://info.tuwien.ac.at/wup/tagung2006/

Institute for Waterpower and Pumps Karlsplatz 13/305, A-1040 Wien, Austria http://info.tuwien.ac.at/wup/

Hidroenergia 2006 06.01.17