Vaned wheel for a turbine, and power generation device
OwnerHidemi Kuritainventor
Life of this patent
Estimating the term…
Abstract
Through dividing all blades into four or more blade groups including a certain number, which is three or more, of the blades, the blade located in the rearmost portion of each blade group in a direction of rotation is selected as a main blade, and remaining blades are selected as auxiliary blades, the length of each of the auxiliary blades is set to be shorter than the length of the main blade, and corresponding inner edge portions are positioned to the front, in the direction of rotation, of a normal line that passes through an outer edge portion of the blade, and an extension line of a chord line that connects the outer edge portion and the inner edge portion of the blade to one another are made to intersect with the main blade that is adjacent to the front in the direction of rotation.
Claims17
A vaned wheel for a turbine, comprising:
- a rotation output axis configured to output rotational force;
- and
- a plurality of blades fixed at positions on the rotation output axis, and disposed at predetermined intervals in a circumferential direction around the rotation output axis, to which force of a fluid that flows through the vaned wheel for a turbine is imparted through making the plurality of blades face the fluid, each of the plurality of blades having a top edge, a bottom edge, an outer edge and an inner edge,
- wherein outer edges of each of the plurality of blades are positioned on a same circle S as seen from an axial direction of the rotation output axis, and are disposed at predetermined intervals along the circumferential direction, and, through dividing all of the blades into at least four or more blade groups that include a certain number, which is at least three or more, of the blades, the blade located in a rearmost portion of each blade group in a direction of rotation is selected as a main blade, and remaining blades are selected as auxiliary blades, the length of each of the auxiliary blades is set to be shorter than the length of the main blade, a corresponding inner edge of each of the blades is positioned to the front, in the direction of rotation, of a normal line that passes through the outer edge of each of the blades, and an extension line of a chord line that connects the outer edge and the inner edge of each of the blades to each other is set so as to intersect with the main blade that is adjacent to the front in the direction of rotation,
- wherein the plurality of blades is configured such that the shape of each of the blades as seen from the axial direction of the rotation output axis comprises a straight line, only a curved line, or a combination of a curved line and a straight line, and wherein an intermediate position thereof is expanded forward in the direction of rotation, and
- wherein the plurality of blades is configured such that the blades are disposed between a pair of opposing support plates formed into circles.
Dependencies are inferred from the claim text.