Hydraulic machine

摘要

A hydraulic machine (1) is provided with a plurality of stay vanes (10) aligned in a circumferential direction, and a rotatable guide vane (20) arranged on the inside of each stay vane (10). An exit node (11) of each stay vane (10) is tangent to a shared reference circle (12). Each guide vane (20) includes a pressure-side blade surface (21) and a negative pressure-side blade surface (22), and has a camber line (25) joining the centers of incircles (24) tangent to both blade surfaces. When each guide vane (20) is at the maximum opening degree, a center point (O) of a largest incircle (24m) having the largest diameter of the incircles (24) of the guide vane (20) is positioned on the exit side of the guide vane (20) from an intersection point (32) between the camber line (25) and a straight line constituting the shortest distance between the exit node (11) of the stay vane (10) and the negative pressure-side blade surface (22) of the corresponding guide vane (20).