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。

公开(公告)号：US07101145B2

公开(公告)日：2006-09-05

申请号：US10796065

申请日：2004-03-10

申请人： Naoki Tsuchiya ,  Dai Kato

发明人： Naoki Tsuchiya ,  Dai Kato

IPC分类号： F01D5/12

CPC分类号： F01D5/141 ,  F04D29/544 ,  Y02T50/671 ,  Y02T50/673

摘要： A fan of an aircraft engine is provided with a rotating fan rotor for feeding air aftward as a spiral flow and a stator vane for rectifying the spiral flow to be an axial flow. The fan stator vane is provided with a hub end portion extending radially relative to a rotating axis of the fan rotor and a tip end portion leaning toward a suction side. Leading edges of the hub end portion and the tip end portion have sweepback angles of from 27 degrees to 33 degrees relative to a radial direction defined by the rotating axis.

摘要翻译： 飞机发动机的风扇设置有用于将空气向后输送为螺旋流的旋转风扇转子和用于将螺旋流整流为轴流的定子叶片。 风扇定子叶片设置有相对于风扇转子的旋转轴线径向延伸的轮毂端部和向吸力侧倾斜的前端部。 轮毂端部和前端部的前缘具有相对于由旋转轴限定的径向方向为27度至33度的回扫角。

公开(公告)号：US20050008494A1

公开(公告)日：2005-01-13

申请号：US10796065

申请日：2004-03-10

申请人： Naoki Tsuchiya ,  Dai Kato

发明人： Naoki Tsuchiya ,  Dai Kato

IPC分类号： F01D5/14 ,  F04D29/54 ,  F04D29/66 ,  B63H1/26

CPC分类号： F01D5/141 ,  F04D29/544 ,  Y02T50/671 ,  Y02T50/673

摘要： A fan of an aircraft engine is provided with a rotating fan rotor for feeding air aftward as a spiral flow and a stator vane for rectifying the spiral flow to be an axial flow. The fan stator vane is provided with a hub end portion extending radially relative to a rotating axis of the fan rotor and a tip end portion leaning toward a suction side. Leading edges of the hub end portion and the tip end portion have sweepback angles of from 27 degrees to 33 degrees relative to a radial direction defined by the rotating axis.

摘要翻译： 飞机发动机的风扇设置有用于将空气向后输送为螺旋流的旋转风扇转子和用于将螺旋流整流为轴流的定子叶片。 风扇定子叶片设置有相对于风扇转子的旋转轴线径向延伸的轮毂端部和向吸力侧倾斜的前端部。 轮毂端部和前端部的前缘具有相对于由旋转轴限定的径向方向为27度至33度的回扫角。

公开(公告)号：US06292376B1

公开(公告)日：2001-09-18

申请号：US09638462

申请日：2000-08-14

申请人： Dai Kato

发明人： Dai Kato

IPC分类号： H02M3335

CPC分类号： H02M3/33507

摘要： An improved switching power supply which saves power when under a small to no load, wherein a transformer is provided comprising a primary winding to which a DC current is supplied by turning ON and OFF a switching device and a secondary winding for supplying an output signal to the load; an ON state control circuit turns ON the switching device by using the output signal induced at the secondary winding; an OFF state control circuit turns OFF the switching device using a current control signal obtained from the output signal from the secondary winding and a reference signal; and wherein a delay circuit prolongs the time at which the switching device makes the OFF to ON transition.

摘要翻译： 一种改进的开关电源，其在小到无负载时节省功率，其中提供变压器，其包括通过接通和断开开关装置而提供直流电流的初级绕组和用于提供输出信号的次级绕组 负载; 接通状态控制电路通过使用在次级绕组处感应的输出信号来接通开关器件; OFF状态控制电路使用从次级绕组的输出信号获得的电流控制信号和参考信号来关断开关装置; 并且其中延迟电路延长了开关器件进入OFF到ON转换的时间。