米-SHAPED FAN BLADE COMBINATION FOR WINDMILL

摘要

A 米 shaped fan blade combination for a windmill is provided, whose blades (9, 10, 11) heighten toward the sky layer by layer. Each layer of the blades (9, 10, 11) is of linear shape distributed at 180 degrees on either side of a vertical axle center (4). A blade combination of upper and lower layers is of 米 shape in the top view. Namely, blade units are arranged at intervals of 45 degrees, and thus output rotation speed can be stabilized. A driving motor (18) is mounted on a protection rod (20) above or below the blades (9, 10, 11). A bearing seat (5) jointing an upper axle center (4) and a lower axle center (4) has an automatic lubricant oil circulation system to protect the axle centers (4).