Patent ID: 6554573
Filing Date: 2003-04-29
Classification: F03B,F03D,Y02E

Abstract:
A rotor intended to rotate in a fluid flowing in a flow direction and comprising at least two and at the most four rotor blades, which are arranged to rotate about an axis of rotation,wherein each blade forms a single-curved surface, the generatrix of which extends in a plane normal to the axis of rotation, each blade having a leading edge, which is turned towards the flow direction and which extends essentially radially away from and normal to the axis of rotation and in a plane forming an inlet angle in the range of 0-10Â° relative to the axis of rotation, and a trailing edge located downstream from the leading edge and extending in a plane, which forms an outlet angle in the range of 80-100Â° relative to the axis of rotation, an imaginary plane interconnecting said leading and trailing edges forming an acute angle with the axis of rotation, and each blade is pivotally mounted for pivotal movement about a pivot shaft in order to adjust the acute angle, said pivot shaft extending in a plane that is normal to the axis of rotation and being parallel to and spaced a distance from an imaginary radius radiating from the axis of rotation.