Projects / Programmes
Study of procesess in mechanical driven shot-blasting machines to use them for shot-penning proceses
| Code |
Science |
Field |
Subfield |
| 2.03.01 |
Engineering sciences and technologies |
Energy engineering |
Efficient energy usage |
| Code |
Science |
Field |
| T130 |
Technological sciences |
Production technology |
velocity, distribuition, particles, shot-blasting, two phase flow solid-gas, shot-penning
Researchers (1)
| no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
| 1. |
19096 |
PhD Gorazd Bombek |
Metrology |
Head |
2008 - 2010 |
137 |
Organisations (1)
Abstract
Project is next step in collaboration between Gostol TST and Laboratory for thermal engines and technical measurements on Faculty of Mechanical engineering in Maribor which started in 2001. One of the results was the measurement system for velocity measurements of particles in flow expanding into space which was presented in PhD thesis. The collaboration continued with the study dedicated to find the influence of geometry of parts in "turbine" to validate their influence on mass flow and efficiency of particle acceleration. One goal of the project is to upgrade existing measurement system to enable simultaneous velocity measurements in several points and to give information regarding the mass flow. Existing system enables measurements in one spot and is vulnerable to sensor orientation. For mass flow measurements mechanical device for trapping particles was used. With a new concept of measurement system consisting of higher number of sensors in two layers we want to decrease measurement time and gather information about mass flow too. New system will be used for testing of changes on "turbine" with the purpose of achieving as uniform distribution as possible. Statistical distribution according to Gauss which occurs on existing devices is not desired, because it is not possible to achieve the same effect on surface in the same time interval. This fact is not convenient for shot-blasting and even more problematic for shot penning. Uniform mass flow and known particles velocity are essential to use mechanical driven acceleration devices instead of pneumatically driven which consume a lot more energy. One of the goals is to study the effect of particles size and rotational speed of the wheel on velocity to gather the data for achieving desired velocity and other properties of the flow.
Significance for science
Measurement system which was upgraded during the project enables measurements of the velocities of particles in two-phase (solid-gas) flow. The flow has abrasive properties due to the nature of particle's acceleration and particle's material which makes it very complicated from measurement point of view. The method is independent from material properties but depends on pulse nature of the flow characteristic for turbo machinery with finite number of blades. That kind of flow is quite common in real life. The measurement system gives some ideas of the process in the particle acceleration device. I would like to finish with the opinion of the referees and the Board member form the journal from the field of measuring technology that we developed and presented a unique measurement method.
Significance for the country
In cooperation with the producer of shot-blasting machinery we improved the design of the wheel and improved the efficiency of the particle acceleration process for 10 %. Modified design in serial production would result in lower energy consumption and some technological advantage (incrase in mass flow can result in lower cycle time and higher machine capacity). This improves the position Gostol TST as the shot-blasting equipment producer too.
The implementation of cast shields offers new design possibilities since the thickness and shape of the shield are not limited by standard plate thickness dimensions. The material waste from cutting is reduced and the energy toxic substances consumption from heat treatment reduced as well. It has to be sterssed that the waste shields are suitable for recycling. The production and recycling is scheduled to be in Livarna Vuzenica.
Most important scientific results
Annual report
2008,
final report,
complete report on dLib.si
Most important socioeconomically and culturally relevant results
Annual report
2008,
final report,
complete report on dLib.si
