The wing and the blade are bent, the transverse section is kept to be a two-dimensional airfoil profile, a vertical line OO is drawn from a midpoint O of the full-length AB straight line of the longitudinal section L downwards parallel to the equal-length CD, and a plurality of equidistant vertical lines are drawn from the point O to the left and right sides of the straight line to two points C and D respectively. The point O is used as an angular point, different angles are sequentially made towards two sides and intersect at corresponding vertical line intersection points, beta is larger than 20 degrees and alpha is smaller than 12 degrees, then the corresponding intersection points on the left and right sides of the point O are smoothly connected to form vortex curves, the vortex curves are connected with two lower ends, and the two vortex curves form a bent wing and a blade. Four longitudinal and transverse curves are back-and-forth interwoven in a three-dimensional space, so that the strength and the rigidity are superior to those of a straight-blade wing and a propeller blade which is deformed and bent. A fan and a propeller which are successfully designed and developed according to a longitudinal two-vortex curve are tested by an authoritative department. The invention has the advantages of high thrust, energy conservation, delay of attack angle and vibration and noise reduction, is a superexcellent method for solving the cavitation problem of airplanes, warships and the like, and achieves the purpose of reducing the rotation loss to the minimum. The method is widely applied to the fields of aircraft wings, rotors, propellers, fans and axial-flow type blades, and the national defense strength is enhanced.
弯曲机翼、叶片保有横向截面为二维翼型,仅将纵向截面L全长AB直线向下平行等长CD的中点O,作垂线OO,以O点向直线左右各作等距离若干垂线至C、D两点。以O点为角点,向两边依次作不同角交于对应垂线交点,β<20°>α<12°,然后包括O点左右各对应交点圆滑连接成涡曲线,又以涡曲线连接下面两端,两涡曲线组成弯曲机翼及叶片。纵横四条曲线背道而驰交织三维空间,强度和刚度优于直叶机翼、螺旋桨桨叶变形弯曲桨叶。按纵向两涡曲线设计研制成功的风扇和螺旋桨经权威部门试验。推力大,节能,推迟攻角,减振降噪,是飞机、军舰等解决空化难题绝佳方法,使转动损失降到最低的目的。本发明广泛应用飞机机翼、旋翼、螺旋桨、风扇及轴流式叶片多个领域,具有增强国防实力。
Bent wing, blade and bent propeller
弯曲机翼、叶片及弯曲螺旋桨
2023-08-29
Patent
Elektronische Ressource
Chinesisch
British Library Conference Proceedings | 1996
|British Library Online Contents | 1996
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