Stay ring for the spiral casing of a rotary hydraulic machine

摘要

A stay vane ring for the spiral casing of a rotary hydraulic machine comprises two axially spaced-apart ring members disposed coaxially about the machine axis and a plurality of axially extending stay vanes connected between the ring members. Each ring member is a cast member having a substantially triangular cross section and is disposed with one wall facing the other ring member, the axial ends of the stay vanes being welded to those walls and the ends of metal plates making up the spiral casing being welded to the ring members along annular edges thereof that are located opposite the aforementioned walls.