STAY VANE OF STAY RING FOR HYDRAULIC MACHINE

摘要

PROBLEM TO BE SOLVED: To reduce the collision loss at the inlet sections of stay vanes by specifying the inlet angle of both end sections of the stay vanes provided on a stay ring provided between guide vanes arranged on the runner outer periphery of a hydraulic machine and a spiral casing. SOLUTION: A stay ring constituted of upper and lower stay rings 9a, 9b is provided with stay vanes 10 in a hydraulic turbine or a pump hydraulic turbine adapted to hydraulic power generation, and an inlet side end edge near the connection end section of the upper and lower stay rings 9a, 9b is extended to the water inflow side along the contour of the middle section of each stay vane 10. An extension section 10a along the contour of the middle section of the stay vane 10 is integrally formed at the inlet side end edge section of the stay vane 10, and the inlet angle near the connection end section to the stay ring is made smaller than the inlet angle at the middle section, thereby the collision loss at the inlets of the stay vanes 10 is reduced, and performance is improved.