Importance

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Abstract

Provided is a hydraulic machine that allows water to smoothly flow in a flow path and has excellent power generation efficiency. In a hydraulic machine 1 including: a casing 2; and a runner 3 rotatably disposed in a central portion of the casing 2, at least one of a plurality of runner vanes 33 included in the hydraulic machine 1 has a pressure surface that receives pressure in an inflow direction from water flowing into the runner 3 through a fixed flow path 21, and, in a cross section of the runner vane 33 perpendicular to the direction of the rotation axis, an outlet angle is 0° or more and less than 20°, the outlet angle being formed between a tangent at a tip portion on an outlet side of the water of the pressure surface and a line segment connecting the rotation axis and the tip portion on an outlet side of the pressure surface.

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First Claim