Patent ID: 9039367
Filing Date: 2015-05-26
Classification: F03D,F05B,F16C,Y02E

Abstract:
1. A propeller windmill for a small-sized power generator, comprising: a lateral support strut rotatably connected to a vertical support strut, a power generator mounted on the lateral support strut; a base blade configured as a two-wing propeller with each wing formed of a thin-plate-like sheet, the base blade having a symmetrical shape with respect to a rotational axis and being mounted behind the power generator on a rotary input shaft of the power generator by way of a hub; and a windcock stabilizing mechanism; wherein the thin-plate-like sheet has a corrugated wing shape such that a cross-sectional shape of each of the wings of the base blade in a direction perpendicular to a direction extending toward a distal end from a proximal end of that wing of the base blade is corrugated, and the base blade is exchangeable with a base blade of a different pitch angle or a different length measured between the proximal end and the distal end of each of the wings of the base blade; and wherein the weathercock stabilizing mechanism is arranged behind the base blade coaxially with the base blade, the weathercock stabilizing mechanism is constituted of a cylindrical body which is formed of a thin sheet material and has a front portion thereof closed, and a plurality of cross wind receiving wings which are continuously formed on a rear end of the cylindrical body, and the power generator, the base blade and the weathercock stabilizing mechanism are formed as an integral body in a, yawing rotatable manner.