公开(公告)号：WO2007140438A2

公开(公告)日：2007-12-06

申请号：PCT/US2007/070028

申请日：2007-05-31

Applicant: ROBERT BOSCH GMBH ,  STEVENS, William ,  STAIRS, Robert, W.

Inventor： STEVENS, William ,  STAIRS, Robert, W.

CPC classification number: F04D29/386 ,  F04D29/164 ,  F04D29/326

Abstract: The present invention provides an axial fan including a hub adapted for rotation about a central axis and a plurality of blades extending radially outwardly from the hub and arranged about the central axis. Each of the blades includes a root, a tip, a leading edge between the root and the tip, and a trailing edge between the root and the tip. Each of the blades defines a blade radius between the blade tips and the central axis. Each of the blades defines a decreasing skew angle within the outer 20% of the blade radius. The ratio of blade pitch to average blade pitch increases from a lowest value to a highest value within the outer 20% of the blade radius. The highest value is about 30% to about 75% greater than the lowest value.

Abstract translation: 本发明提供了一种轴流风扇，其包括适于围绕中心轴线旋转的轮毂和从轮毂径向向外延伸并围绕中心轴线布置的多个叶片。 每个叶片包括根部，尖端，根部和尖端之间的前缘以及根部和尖端之间的后缘。 每个叶片限定叶片尖端和中心轴线之间的叶片半径。 每个叶片在叶片半径的外部20％内限定了减小的倾斜角度。 叶片间距与平均叶片间距的比率在叶片半径的外部20％内从最低值增加到最高值。 最高值比最低值大约30％至大约75％。

公开(公告)号：WO0238962A3

公开(公告)日：2002-07-25

申请号：PCT/US0143969

申请日：2001-11-06

Applicant: BOSCH ROBERT CORP ,  STAIRS ROBERT W ,  GREELEY DAVID S

Inventor： STAIRS ROBERT W ,  GREELEY DAVID S

IPC: B60H1/32 ,  F01P3/18 ,  F01P5/06 ,  F01P11/10 ,  F04D29/32 ,  F04D29/38 ,  F04D29/52 ,  F04D29/58 ,  F04D29/60 ,  B63H1/16 ,  F04D29/66

CPC classification number: F04D29/384 ,  F01P5/06 ,  F01P11/10 ,  F01P2003/187 ,  F04D29/326 ,  F04D29/582

Abstract: An efficient axial flow fan (2) comprises a central hub (6), a plurality of blades (8), and a band (9), and is designed to operate in a shroud (4) and induce flow through one or more heat exchangers (5) - in an automotive engine cooling assembly, for example. The fan blades (8) have a radial distribution of pitch ratio that provides high efficiency and low noise in the non-uniform flow field created by the heat exchanger(s)(5) and shroud (4). The blade (8) has either no sweep, or is swept backward (i.e. opposite the direction of rotation) in the region between the radial location r/R=0.70 and the tip (r/R-1.00). The blade pitch ratio increases from the radial location r/R=0.85 to a radial location between r/R=0.90 and r/R=0.975, and then decreases to the blade trip.

Abstract translation: 有效的轴流风扇（2）包括中心毂（6），多个叶片（8）和带（9），并被设计成在护罩（4）中操作并且引导流过一个或多个热 交换器（5） - 例如在汽车发动机冷却组件中。 风扇叶片（8）具有在由热交换器（5）和护罩（4）产生的非均匀流场中提供高效率和低噪声的俯仰比的径向分布。 在径向位置r / R = 0.70和尖端（r / R-1.00）之间的区域中，刀片（8）没有扫过或向后扫掠（即与旋转方向相反）。 叶片间距比从径向位置r / R = 0.85增加到r / R = 0.90和r / R = 0.975之间的径向位置，然后减小到叶片跳闸。

公开(公告)号：WO2007140438A3

公开(公告)日：2008-01-24

申请号：PCT/US2007070028

申请日：2007-05-31

Applicant: BOSCH GMBH ROBERT ,  STEVENS WILLIAM ,  STAIRS ROBERT W

Inventor： STEVENS WILLIAM ,  STAIRS ROBERT W

IPC: F04D29/58 ,  F04D29/16 ,  F04D29/38

CPC classification number: F04D29/326 ,  F04D29/386 ,  F04D29/547

Abstract: The present invention provides an axial fan (26) including a hub (54) adapted for rotation about a central axis and a plurality of blades (58) extending radially outwardly from the hub and arranged about the central axis. Each of the blades includes a root (66), a tip (70), a leading edge (74) between the root and the tip, and a trailing edge (78) between the root and the tip. Each of the blades defines a blade radius (R) between the blade tips and the central axis. Each of the blades defines a decreasing skew angle within the outer 20% of the blade radius. The ratio of blade pitch to average blade pitch increases from a lowest value to a highest value within the outer 20% of the blade radius. The highest value is about 30% to about 75% greater than the lowest value.

Abstract translation: 本发明提供了一种轴流风扇（26），其包括适于围绕中心轴线旋转的轮毂（54）和从轮毂径向向外延伸并围绕中心轴线布置的多个叶片（58）。 每个叶片包括根部（66），尖端（70），在根部和尖端之间的前缘（74）以及在根部和尖端之间的后缘（78）。 每个叶片限定叶片尖端和中心轴线之间的叶片半径（R）。 每个叶片在叶片半径的外部20％内限定了减小的倾斜角度。 叶片间距与平均叶片间距的比率在叶片半径的外部20％内从最低值增加到最高值。 最高值比最低值大约30％至大约75％。