Patent ID: 6726442
Filing Date: 2004-04-27
Classification: F01D,F05D

Abstract:
A self-starting disc turbine comprising:a housing defining an interior space; a rotatable shaft passing through said housing and having an axis of rotation; a plurality of rotor discs mounted to said shaft for concentric rotation therewith, each said rotor disc having a circumference with a radius R generally perpendicular to said axis of rotation and defining a plurality of vents, said vents being contoured with a maximum distance r extending from the axis of rotation; and an inlet nozzle orifice that directs a working fluid into said housing generally parallel to said discs and at an angle of injection relative to the circumference of said rotor discs, wherein said angle of injection is selected from a range of angles between a minimum angle of injection &agr; and a maximum angle of injection &bgr; so that said working fluid accelerates a rotational speed of said plurality of rotor discs, wherein: said minimum angle of injection &agr; is measured between a tangent to the disc circumference at a point P and a line Ps connecting said point P with a point s on an abscissa passing through said axis of rotation, where said point P is an intersection point of said disc circumference and an ordinate perpendicular to said abscissa spaced R/3 along said abscissa from said axis of rotation, and said point s is spaced a distance (r+R)/2 from said axis of rotation, and said maximum angle of injection &bgr; is measured between a tangent to the disc circumference at a point Pâ€² and a line Pâ€²t tangent to a circle of radius r concentric with axis of rotation, where said point Pâ€² is an intersection point of said disc circumference and an ordinate perpendicular to said abscissa spaced 2R/3 along said abscissa from said axis of rotation, and point t is a tangent point of Pâ€²t on radius r.