公开(公告)号：US06726445B2

公开(公告)日：2004-04-27

申请号：US10220061

申请日：2002-08-28

申请人： Naoki Tsuchiya ,  Ryou Umeyama ,  Dai Kato

发明人： Naoki Tsuchiya ,  Ryou Umeyama ,  Dai Kato

IPC分类号： F01D904

CPC分类号： F04D29/324 ,  F01D5/10 ,  F01D5/141 ,  F02K3/06 ,  F04D29/544 ,  F05D2220/327 ,  F05D2250/70 ,  F05D2260/96 ,  Y02T50/673

摘要： A low noise fan stationary blade, wherein a negative lean angle &thgr;L in the reverse direction of a rotating direction is provided near a hub and a positive lean angle &thgr;L in the rotating direction is provided on the other tip side, the negative lean angle &thgr;L is −10°±3° in a high loss area near the hub and the positive lean angle &thgr;L is 30°±3° on the tip side, a positive sweep angle &thgr;s is provided, and the positive sweep angle &thgr;s is 20°±3° on the hub side and 20°±3° also on the tip side, whereby a total pressure loss on both hub and tip sides can be reduced, noise can be reduced on both hub and tip sides, and thus noise can be reduced without lowering an aerodynamic performance.

摘要翻译： 低噪声风扇固定叶片，其中在轮毂附近提供沿旋转方向的相反方向的负倾斜角度θL，并且在另一个尖端侧设置旋转方向的正倾斜角度θL，负倾斜角度θL为 在轮毂附近的高损耗区域为-10°±3°，尖端侧的正倾角θL为30°±3°，提供正扫掠角度，正扫描角度为20°±3° 轴向侧为20°，尖端侧为20°±3°，从而可以减小轮毂和前端两侧的总压力损失，同时在轮毂和轮毂两侧可以减少噪音，从而可以降低噪音，无需 降低空气动力性能。