Guide vane of hydraulic machinery and hydraulic machine

• US 10,590,904 B2
• Filed: 10/11/2016
• Issued: 03/17/2020
• Est. Priority Date: 03/10/2016
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Narikawa, Madoka, Kawajiri, Hideyuki, Ohtake, Norio, Kubo, Koichi, Kurokawa, Toshifumi, Noda, Nobuaki
• Primary Examiner(s): Bomberg, Kenneth
• Assistant Examiner(s): Hunter, Jr., John S
• Application Number:
  US15/290,314
• Publication Number:
  US 20170260958A1
• Time in Patent Office: 1,253 Days
• CPC Class Codes: F03B 13/10 Submerged units incorporating electric generators or motors
• CPC Class Codes: F03B 3/02 with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines rotors per se F03B3/125
• CPC Class Codes: F03B 3/183 Adjustable vanes, e.g. wicket gates
• CPC Class Codes: F03B 3/186 Spiral or volute casings
• CPC Class Codes: F05B 2250/182 crenellated, notched
• CPC Class Codes: Y02E 10/20 Hydro energy

Abstract

A vane body of a guide vane includes a leading edge, and a trailing edge which is located closer to a runner than the leading edge, when located radially outside the runner. A projection extending in a direction from the trailing edge toward the leading edge is provided on an internal-diameter side blade face of the vane body, at least in any one of one side area of the internal-diameter side blade face and the other side area thereof in an axial direction of a guide vane rotation shaft, the internal-diameter side blade face being disposed on a side of the runner. The projection has a projection rear end of an arcuate shape, which projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft.

Claims

1. A guide vane of a hydraulic machine, comprising a vane body and a guide vane rotation shaft connected to the vane body, the guide vane rotation shaft being configured to rotate the entire vane body by a rotation of the guide vane rotation shaft,

the guide vane being located radially outside a runner of the hydraulic machine to be rotatable about the guide vane rotation shaft, with the guide vane rotation shaft being in parallel to a rotation axis of the runner,

wherein:

the vane body includes a leading edge, a trailing edge which is located closer to the runner than the leading edge when located radially outside the runner, an internal-diameter side blade face being disposed on a first side of the runner, and an external-diameter side blade face being disposed on a second side opposed to the first side of the runner;

an inner-side projection extending in a direction from the trailing edge toward the leading edge is provided on the internal-diameter side blade face of the vane body;

an outer-side projection extending in a direction from the leading edge toward the trailing edge is further provided on the external-diameter side blade face of the vane body;

the inner-side projection extending in the direction from the trailing edge toward the leading edge and the outer-side projection extending in the direction from the leading edge toward the trailing edge are provided in at least any one of an upper side area of the guide vane and a lower side area of the guide vane in an axial direction of the guide vane rotation shaft;

the inner-side projection in the direction from the trailing edge toward the leading edge has a first projection rear end of an arcuate shape, wherein the first projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft;

the outer-side projection extending in the direction from the leading edge toward the trailing edge has a projection front end, wherein the projection front end is formed to extend along an extension of camber line of the vane body;

when the guide vane is in a full closed condition, the external-diameter side blade face of the guide vane and an adjacent internal-diameter side blade face of a first adjacent guide vane are in contact with each other, and the internal-diameter side blade face of the guide vane and an adjacent external-diameter side blade face of a second adjacent guide vane are in contact with each other; and

the inner-side projection and the outer-side projection are disposed in positions at which the inner-side projection does not interfere with an adjacent outer-side projection of the second adjacent guide vane, and the outer-side projection does not interfere with an adjacent inner-side projection of the first adjacent guide vane when the guide vane is moved from a full open condition to the full closed condition.

2. The guide vane of a hydraulic machine according to claim 1, wherein a relationship between a chord length of the vane body and a projection width of at least one of the inner-side projection and the outer-side projection is represented by:

2≤

(Lg/Ls)×

100≤

10,

wherein Ls is the chord length of the vane body and Lg is the projection width.

3. The guide vane of a hydraulic machine according to claim 1, wherein an outer face of at least one of the inner-side projection and the outer-side projection, which faces outside in the axial direction of the guide vane rotation shaft, is coplanarly continuous with an end face of the vane body on which the at least one of the inner-side projection and the outer-side projection is provided.

4. A hydraulic machine comprising:

a runner configured to rotate about a rotation axis; and

the guide vane according to claim 1, wherein the guide vane is located radially outside the runner.

5. A guide vane of a hydraulic machine, comprising a vane body and a guide vane rotation shaft connected to the vane body, the guide vane rotation shaft being configured to rotate the entire vane body by a rotation of the guide vane rotation shaft,

the guide vane being located radially outside a runner of the hydraulic machine to be rotatable about the guide vane rotation shaft, with the guide vane rotation shaft being in parallel to a rotation axis of the runner,

wherein:

the vane body includes a leading edge, a trailing edge which is located closer to the runner than the leading edge when located radially outside the runner, an internal-diameter side blade face being disposed on a first side of the runner, and an external-diameter side blade face being disposed on a second side opposed to the first side of the runner;

an inner-side projection extending in a direction from the trailing edge toward the leading edge is provided on the internal-diameter side blade face of the vane body;

an outer-side projection extending in a direction from the leading edge toward the trailing edge is further provided on the external-diameter side blade face of the vane body;

the inner-side projection extending in the direction from the trailing edge toward the leading edge and the outer-side projection extending in the direction from the leading edge toward the trailing edge are provided in at least any one of an upper side area of the guide vane and a lower side area of the guide vane in an axial direction of the guide vane rotation shaft;

the inner-side projection in the direction from the trailing edge toward the leading edge has a first projection rear end of an arcuate shape, wherein the first projection rear end is formed to extend along a rotation trajectory which is drawn by the trailing edge when the vane body is rotated about the guide vane rotation shaft; and

the outer-side projection extending in the direction from the leading edge toward the trailing edge has a projection front end, wherein the projection front end is formed to extend along an extension of camber line of the vane body.