Propeller |
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| 申请号 | JP21646088 | 申请日 | 1988-09-01 | 公开(公告)号 | JPH01266095A | 公开(公告)日 | 1989-10-24 |
| 申请人 | Mtu Motoren & Turbinen Union Muenchen Gmbh; | 发明人 | HANSU BISHIYOTSUFU; NORUBERUTO HIYUUPUNAA; | ||||
| 摘要 | PURPOSE: To generate an air flow inward in the radial direction without generating bending moment by curving a propeller blade so as to generate rising static pressure on the hub side when acting force perpendicular to the surface on the pressure side and the suction side of an aerofoil is integrated on the height of a propeller, and setting the center of gravity of the blade to be on the upper side in the radial direction of a fixture. CONSTITUTION: For avoiding the problem of strength caused by bending moment, the center of gravity S of a propeller blade lies radially above the propeller blade fixture. In this case, pressure gradient is reduced inward from the radius Rx. For attaining fixing of the blade without bending moment, negative inclination (right-hand hatch) is required between sections N and M, meanwhile, as far as static pressure rises inward in all, positive inclination (left-hand hatch) is required between sections N and G. Hence the center of gravity of the whole blade is conformed to the plane center of gravity Sn of the hub section. Next, for attaining the best pressure gradient against each flight speed and rotating speed of the propeller, an inclination changing mechanism is useful. COPYRIGHT: (C)1989,JPO |
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