Hydraulic turbine
First Claim
Patent Images
1. A turbine, comprising:
- a plurality of blades configured to travel a path around a first axis and a second axis parallel to the first axis, the path comprising;
a first segment from the second axis to the first axis, the first segment being a first stage of the turbine,a second segment around the first axis,a third segment from the first axis to the second axis, the third segment being a second stage of the turbine, anda fourth segment around the second axis;
wherein each of the plurality of blades have an orientation relative to a vector of blade travel resulting in a blade negative stagger angle in the first stage of the turbine, and a blade positive stagger angle in the second stage of the turbine.
1 Assignment
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Accused Products
Abstract
Disclosed herein are linear hydraulic turbines in which the linear machine converts the majority of available energy in the flowing water into useful torque directly in the runner, leaving the outflow with very little velocity.
20 Citations
21 Claims
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1. A turbine, comprising:
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a plurality of blades configured to travel a path around a first axis and a second axis parallel to the first axis, the path comprising; a first segment from the second axis to the first axis, the first segment being a first stage of the turbine, a second segment around the first axis, a third segment from the first axis to the second axis, the third segment being a second stage of the turbine, and a fourth segment around the second axis; wherein each of the plurality of blades have an orientation relative to a vector of blade travel resulting in a blade negative stagger angle in the first stage of the turbine, and a blade positive stagger angle in the second stage of the turbine. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A turbine, comprising:
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a plurality of blades configured to travel a path around a first axis and a second axis parallel to the first axis, the path comprising; a first segment from the second axis to the first axis, the first segment being a first stage of the turbine, a second segment around the first axis, a third segment from the first axis to the second axis, the third segment being a second stage of the turbine, and a fourth segment around the second axis; wherein each of the plurality of blades have an orientation relative to a vector of blade travel resulting in a blade negative stagger angle in the first stage of the turbine, and a blade positive stagger angle in the second stage of the turbine, and wherein the first axis and the second axis are spaced along a horizontal plane.
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8. A turbine, comprising:
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a plurality of blades attached to a structure and traveling a path comprising a first stage substantially linear portion, a first substantially arc-shaped portion, a second stage substantially linear portion, and a second substantially arc-shaped portion; a plurality of stationary guide vanes arranged in a space enclosed by the structure; and a shroud positioned adjacent to the first substantially arc-shaped portion and conforming to a curvature of the first substantially arc-shaped portion, the turbine being configured to receive a free jet working fluid, the free jet working fluid having a flow pattern through the turbine in a plane substantially perpendicular to the first stage and the second stage, wherein each of the plurality of blades have an orientation relative to a vector of blade travel resulting in a blade negative stagger angle in the first stage substantially linear portion, and a blade positive stagger angle in the second stage substantially linear portion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A turbine, comprising:
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a plurality of blades attached to a structure and traveling a path comprising a first stage substantially linear portion, a first substantially arc-shaped portion, a second stage substantially linear portion, and a second substantially arc-shaped portion; a plurality of stationary guide vanes arranged in a space enclosed by the structure; a shroud positioned adjacent to the first substantially arc-shaped portion and conforming to a curvature of the first substantially arc-shaped portion; and a movable structure configured to have a deflection position and a non-deflection position, the turbine being configured to receive a free jet working fluid, the free jet working fluid having a flow pattern through the turbine in a plane substantially perpendicular to the first stage and the second stage, wherein when the movable structure is in the deflection position, the movable structure redirects the free jet working fluid away from the plurality of blades.
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17. A turbine, comprising:
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a plurality of blades attached to a structure and traveling a path comprising a first stage substantially linear portion, a first substantially arc-shaped portion, a second stage substantially linear portion, and a second substantially arc-shaped portion; a plurality of stationary guide vanes arranged in a space enclosed by the structure; and a shroud positioned adjacent to the first substantially arc-shaped portion and conforming to a curvature of the first substantially arc-shaped portion, the turbine being configured to receive a free jet working fluid, the free jet working fluid having a flow pattern through the turbine in a plane substantially perpendicular to the first stage and the second stage, wherein the turbine is enclosed by a chamber, the chamber being sealed and having a control valve, wherein the free jet working fluid leaving the second stage of the turbine exits the chamber through a draft chamber, the draft chamber having an outlet that is hydraulically sealed to an outlet fluid body, wherein movement of the free jet working fluid through an enclosed air space in the chamber entrains bubbles of the surrounding atmosphere, wherein momentum of free jet working fluid evacuates the entrained bubbles of the surrounding atmosphere from the chamber, and wherein the control valve is configured to allow an amount of air to enter the chamber to maintain a desired elevation of suction head inside the draft chamber without allowing the outlet fluid body to contact the plurality of blades.
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18. A turbine system comprising:
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a turbine comprising; a plurality of blades attached to a structure and traveling a path comprising a first stage substantially linear portion, a first substantially arc-shaped portion, a second stage substantially linear portion, and a second substantially arc-shaped portion; a plurality of stationary guide vanes arranged in a space enclosed by the structure; and a shroud positioned adjacent to the first substantially arc-shaped portion and conforming to a curvature of the first substantially arc-shaped portion, wherein each of the plurality of blades have a fixed orientation relative to a vector of blade travel, and wherein the plurality of blades are configured such that their curvature is asymmetric about the path of travel; and a confined flow nozzle having a rectangular cross-section, the confined flow nozzle being configured to provide a free jet working fluid to the turbine, the free jet working fluid having a flow pattern through the turbine in a plane substantially perpendicular to the first stage and the second stage.
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19. A turbine system comprising:
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a turbine comprising; a plurality of blades attached to a structure and traveling a path comprising a first stage substantially linear portion, a first substantially arc-shaped portion, a second stage substantially linear portion, and a second substantially arc-shaped portion; a plurality of stationary guide vanes arranged in a space enclosed by the structure; and a shroud positioned adjacent to the first substantially arc-shaped portion and conforming to a curvature of the first substantially arc-shaped portion; a confined flow nozzle having a rectangular cross-section, the confined flow nozzle being configured to provide a free jet working fluid to the turbine, the free jet working fluid having a flow pattern through the turbine in a plane substantially perpendicular to the first stage and the second stage, wherein the confined flow nozzle comprises two opposing movable panels configured to vary a cross-sectional area of the free jet working fluid. - View Dependent Claims (20, 21)
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Specification