| Issue |
MATEC Web Conf.
Volume 188, 2018
5th International Conference of Engineering Against Failure (ICEAF-V 2018)
|
|
|---|---|---|
| Article Number | 04005 | |
| Number of page(s) | 8 | |
| Section | Design of Components and Engineering Elements, Coatings, Failure Analysis | |
| DOI | https://doi.org/10.1051/matecconf/201818804005 | |
| Published online | 07 August 2018 | |
Integrity Analysis of the Rainwater Pump Impeller
1
Politehnica University of Timisoara,
1 Mihai Viteazul Blvd.,
300222,
Timisoara,
Romania
2
Romanian Academy – Timisoara Branch,
24 Mihai Viteazul Blvd.,
300223,
Timisoara,
Romania
3
Aquatim S.A. Timisoara,
11/A Gheorghe Lazăr Street,
300081,
Timisoara,
Romania
* Corresponding author: sergiu.galatanu@upt.ro
The purpose of this paper is to examine the failure problems encountered during the operation of the rainwater pump impellers installed in a wastewater station. The rainwater pumps are specially designed to operate in wastewater plants. The fibbers and wastes are discharged together with rainwater during storms with this type of pumps to avoid the flood of the wastewater station. Several problems have occurred in service due to the fibbers clog the gap between the impeller blades and the pump casing. The analysis of the catastrophic events associated to the rainwater pumps installed in a wastewater station is performed. As a result, it has been identified that the catastrophic events are due to the brittle fracture of the fasten bolts connecting the impeller blades and the pump hub, respectively. Analytical and numerical analysis were perform in order to determine the maximum shear stress on the fasten bolts. As a conclusion the partial clogging of the gap between one impeller blade and pump casing, inducing the lock of the blade and leading to catastrophic failure.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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