Title:
水力タービン
Document Type and Number:
Japanese Patent JP4211896
Kind Code:
B2
Abstract:
An hydraulic turbine includes a rotatable turbine runner. The turbine runner has a circumferential inlet for receiving a fluid and an axial outlet for discharging the fluid. The turbine runner also includes a conical-shaped hub rotatable about a central axis, the hub having a diameter that decreases in size from the inlet to the outlet, the conical-shaped hub including a base having a circumference adjacent the inlet and a surface sloping inwardly toward the central axis, the surface including a concave section facing the inlet when viewed in the meridional cross-section. The turbine runner also includes at least two helical turbine blades connected to the conical-shaped hub, each turbine blade having a leading edge adjacent to the inlet, a trailing edge adjacent to the outlet, a blade running length therebetween having a pitch, each turbine blade further including an outer edge, wherein each turbine blade winds at least halfway around the conical-shaped hub. The turbine runner also includes a shroud surface surrounding the rotatable hub, the shroud surface being defined by the outer edges of the turbine blades, the shroud surface and the hub defining a flow channel for the fluid between the inlet and the outlet. The circumferential inlet completely surrounds the base of the hub and is adapted for receiving a fluid flow around the circumference of the inlet that is uniform in quantity, direction and pressure, the fluid flow including a component perpendicular to the central axis when viewed in the meridional cross-section. The hub surface and the shroud surface are both non-parallel to the central axis at the inlet and parallel to the central axis at the outlet for changing the direction of the fluid passing through the turbine runner. The fluid is discharged from the turbine runner outlet in a direction that is substantially parallel to the central axis.
Inventors:
Hecker, George Yi
Jansen, Willem
Jansen, Willem
Application Number:
JP52587398A
Publication Date:
January 21, 2009
Filing Date:
November 25, 1997
Export Citation:
Assignee:
Concepts ETI Inc.
Alden Research Laboratory Inc.
Alden Research Laboratory Inc.
International Classes:
F03B3/12; F03B3/02
Domestic Patent References:
| JP50141711A | ||||
| JP219305B2 |
Attorney, Agent or Firm:
Warren G. Simor
Previous Patent: 高遮断性ポリプロピレン組成物及びそれらの包装用途における使用
Next Patent: TARGET LOCK DEVICE THAT CAN MAGNETICALLY BE RESET
Next Patent: TARGET LOCK DEVICE THAT CAN MAGNETICALLY BE RESET