Influence of loading regimes and operational environment on fatigue state of components of turbine and hydromechanical equipment at hydropower
Апстракт
Horizontal Kaplan turbines, were installed in 10 generating sets units at „DJERDAP 2“. After 163.411 hours of operation, the fracture of the hydro-electric generating set A6 turbine shaft in the area of high stress concentration occurred, at the transition radius between the flange and the runner hub. In this paper the results of the analytical calculation regarding the strength of the turbine shaft are presented and influence of the corrosive environment, as well as tests regarding the fatigue. Tensile tests under constant amplitude loading were carried out on smooth specimens in order to determine fatigue properties of the base material, as well as bending tests on notched specimens in order to determine fracture mechanics parameters, or correlation between the crack growth rate da/dN and the stress intensity factor ΔK. It has been established that stress values were higher than allowable values, which led to the occurence of many cracks due to fatigue corrosion. One of those cracks ...caused the fracture.
Кључне речи:
turbine shaft / stress concentration / corrosion / fatigue / crackИзвор:
International Conference Power Plants 2012, 2012, 1-10Издавач:
- Društvo termičara Srbije
Финансирање / пројекти:
- Одрживост и унапређење машинских система у енергетици и транспорту применом форензичког инжењерства, еко и робуст дизајна (RS-MESTD-Technological Development (TD or TR)-35006)
- Развој нових методологија ревитализације турбинске и хидромеханичке опреме хидроелектрана у зависности од узрока деградације материјала (RS-MESTD-Technological Development (TD or TR)-35002)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Arsić, Miodrag AU - Bošnjak, Srđan AU - Međo, Bojan AU - Burzić, Meri AU - Vistać, Brane AU - Savić, Zoran PY - 2012 UR - https://machinery.mas.bg.ac.rs/handle/123456789/5253 AB - Horizontal Kaplan turbines, were installed in 10 generating sets units at „DJERDAP 2“. After 163.411 hours of operation, the fracture of the hydro-electric generating set A6 turbine shaft in the area of high stress concentration occurred, at the transition radius between the flange and the runner hub. In this paper the results of the analytical calculation regarding the strength of the turbine shaft are presented and influence of the corrosive environment, as well as tests regarding the fatigue. Tensile tests under constant amplitude loading were carried out on smooth specimens in order to determine fatigue properties of the base material, as well as bending tests on notched specimens in order to determine fracture mechanics parameters, or correlation between the crack growth rate da/dN and the stress intensity factor ΔK. It has been established that stress values were higher than allowable values, which led to the occurence of many cracks due to fatigue corrosion. One of those cracks caused the fracture. PB - Društvo termičara Srbije C3 - International Conference Power Plants 2012 T1 - Influence of loading regimes and operational environment on fatigue state of components of turbine and hydromechanical equipment at hydropower EP - 10 SP - 1 UR - https://hdl.handle.net/21.15107/rcub_machinery_5253 ER -
@conference{ author = "Arsić, Miodrag and Bošnjak, Srđan and Međo, Bojan and Burzić, Meri and Vistać, Brane and Savić, Zoran", year = "2012", abstract = "Horizontal Kaplan turbines, were installed in 10 generating sets units at „DJERDAP 2“. After 163.411 hours of operation, the fracture of the hydro-electric generating set A6 turbine shaft in the area of high stress concentration occurred, at the transition radius between the flange and the runner hub. In this paper the results of the analytical calculation regarding the strength of the turbine shaft are presented and influence of the corrosive environment, as well as tests regarding the fatigue. Tensile tests under constant amplitude loading were carried out on smooth specimens in order to determine fatigue properties of the base material, as well as bending tests on notched specimens in order to determine fracture mechanics parameters, or correlation between the crack growth rate da/dN and the stress intensity factor ΔK. It has been established that stress values were higher than allowable values, which led to the occurence of many cracks due to fatigue corrosion. One of those cracks caused the fracture.", publisher = "Društvo termičara Srbije", journal = "International Conference Power Plants 2012", title = "Influence of loading regimes and operational environment on fatigue state of components of turbine and hydromechanical equipment at hydropower", pages = "10-1", url = "https://hdl.handle.net/21.15107/rcub_machinery_5253" }
Arsić, M., Bošnjak, S., Međo, B., Burzić, M., Vistać, B.,& Savić, Z.. (2012). Influence of loading regimes and operational environment on fatigue state of components of turbine and hydromechanical equipment at hydropower. in International Conference Power Plants 2012 Društvo termičara Srbije., 1-10. https://hdl.handle.net/21.15107/rcub_machinery_5253
Arsić M, Bošnjak S, Međo B, Burzić M, Vistać B, Savić Z. Influence of loading regimes and operational environment on fatigue state of components of turbine and hydromechanical equipment at hydropower. in International Conference Power Plants 2012. 2012;:1-10. https://hdl.handle.net/21.15107/rcub_machinery_5253 .
Arsić, Miodrag, Bošnjak, Srđan, Međo, Bojan, Burzić, Meri, Vistać, Brane, Savić, Zoran, "Influence of loading regimes and operational environment on fatigue state of components of turbine and hydromechanical equipment at hydropower" in International Conference Power Plants 2012 (2012):1-10, https://hdl.handle.net/21.15107/rcub_machinery_5253 .