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公开(公告)号:US20110142614A1
公开(公告)日:2011-06-16
申请号:US12967196
申请日:2010-12-14
申请人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
发明人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
CPC分类号: F04D29/663 , F04D19/002 , F04D19/007 , F04D19/024 , F04D29/526 , F04D29/542 , F04D29/547 , F04D29/667 , F04D29/681
摘要: A counter-rotating axial flow fan with reduced noise at the target operating point achieved without modifying a front impeller, a rear impeller, or a middle stationary portion is provided. An annular rib including a projecting surface for generating turbulent flow is formed on an inner wall portion of a casing at a position off from the middle stationary portion to a side of the rear impeller, the projecting surface extending radially inwardly of the inner wall portion and extending continuously in the circumferential direction of the inner wall portion. A fluid striking the projecting surface for generating turbulent flow is partially disturbed to form a turbulent flow before entering an area in which the rear impeller is provided. The turbulent flow suppresses flow separation of a fluid flowing along the surfaces of rear blades of the rear impeller from the surfaces of the rear blades.
摘要翻译: 提供了在不改变前叶轮,后叶轮或中间静止部分的情况下实现在目标操作点处具有降低的噪声的反向旋转轴流风扇。 在从中间静止部分到后部叶轮的一侧的位置处,在壳体的内壁部分上形成包括用于产生湍流的突出表面的环形肋,所述突出表面沿着内壁部分的径向向内延伸, 在内壁部的圆周方向上连续延伸。 撞击突出表面以产生湍流的流体在进入其中设置后叶轮的区域之前部分地被扰动以形成湍流。 湍流抑制沿着后叶片的后叶的表面流动的流体与后叶片的表面的流动分离。
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公开(公告)号:US20110142612A1
公开(公告)日:2011-06-16
申请号:US12967200
申请日:2010-12-14
申请人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
发明人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
CPC分类号: F04D29/544 , F04D19/007 , F04D19/024 , F04D29/663
摘要: A counter-rotating axial flow fan in which the shape of stationary blades of a middle stationary portion is optimized to reduce noise is provided. Defining the maximum axial chord length of front blades as Lf, the maximum axial chord length of rear blades as Lr, and the maximum axial chord length of stationary blades as Lm, a relationship of Lm/(Lf+Lr) 5.8.
摘要翻译: 提供了一种反向旋转轴流风扇,其中中间静止部分的固定叶片的形状被优化以降低噪声。 将前刀片的最大轴向长度定义为Lf,后刀片的最大轴向弦长度为Lr,固定刀片的最大轴向弦长为Lm,满足Lm /(Lf + Lr)<0.14的关系。 定义固定叶片下表面的叶片和下表面之间的最大尺寸为K1,固定叶片的最大轴向弦长Lm满足Lm / K1> 5.8的关系。
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公开(公告)号:US08807919B2
公开(公告)日:2014-08-19
申请号:US12967196
申请日:2010-12-14
申请人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka, Sr. , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
发明人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka, Sr. , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
CPC分类号: F04D29/663 , F04D19/002 , F04D19/007 , F04D19/024 , F04D29/526 , F04D29/542 , F04D29/547 , F04D29/667 , F04D29/681
摘要: A counter-rotating axial flow fan with reduced noise at the target operating point achieved without modifying a front impeller, a rear impeller, or a middle stationary portion is provided. An annular rib including a projecting surface for generating turbulent flow is formed on an inner wall portion of a casing at a position off from the middle stationary portion to a side of the rear impeller, the projecting surface extending radially inwardly of the inner wall portion and extending continuously in the circumferential direction of the inner wall portion. A fluid striking the projecting surface for generating turbulent flow is partially disturbed to form a turbulent flow before entering an area in which the rear impeller is provided. The turbulent flow suppresses flow separation of a fluid flowing along the surfaces of rear blades of the rear impeller from the surfaces of the rear blades.
摘要翻译: 提供了在不改变前叶轮,后叶轮或中间静止部分的情况下实现在目标操作点处具有降低的噪声的反向旋转轴流风扇。 在从中间静止部分到后部叶轮的一侧的位置处,在壳体的内壁部分上形成包括用于产生湍流的突出表面的环形肋,所述突出表面沿着内壁部分的径向向内延伸, 在内壁部的圆周方向上连续延伸。 撞击突出表面以产生湍流的流体在进入其中设置后叶轮的区域之前部分地被扰动以形成湍流。 湍流抑制沿着后叶片的后叶的表面流动的流体与后叶片的表面的流动分离。
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公开(公告)号:US20110142611A1
公开(公告)日:2011-06-16
申请号:US12967192
申请日:2010-12-14
申请人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
发明人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
CPC分类号: F04D29/663 , F04D19/007 , F04D19/024 , F04D29/38 , F04D29/544
摘要: A counter-rotating axial flow fan with improved characteristics and reduced noise compared to the related art can be provided. Defining the number of front blades as N, the number of stationary blades as M, and the number of rear blades as P, and defining the maximum axial chord length of the front blades as Lf, the maximum axial chord length of the rear blades as Lr, the outside diameter of the front blades as Rf, and the outside diameter of the rear blades as Rr, the counter-rotating axial flow fan satisfies the following two relationships: N≧P>M; and Lf/(Rf×π/N)≧1.25 and/or Lr/(Rr×π/P)≧0.83.
摘要翻译: 可以提供与现有技术相比具有改进的特性和降低的噪声的反向旋转轴流风扇。 将前刀片的数量定义为N,固定刀片的数量为M,后刀片的数量为P,并将前刀片的最大轴向弦长定义为Lf,后刀片的最大轴向弦长度为 Lr,前叶片的外径为Rf,后刀片的外径为Rr,反向旋转轴流风扇满足以下两种关系:N≥P> M; Lf /(Rf×&pgr; / N)≥1.25和/或Lr /(Rr×&pgr; / P)≥0.83。
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公开(公告)号:US08764375B2
公开(公告)日:2014-07-01
申请号:US12967192
申请日:2010-12-14
申请人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
发明人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
IPC分类号: F04D19/02
CPC分类号: F04D29/663 , F04D19/007 , F04D19/024 , F04D29/38 , F04D29/544
摘要: A counter-rotating axial flow fan with improved characteristics and reduced noise compared to the related art can be provided. Defining the number of front blades as N, the number of stationary blades as M, and the number of rear blades as P, and defining the maximum axial chord length of the front blades as Lf, the maximum axial chord length of the rear blades as Lr, the outside diameter of the front blades as Rf, and the outside diameter of the rear blades as Rr, the counter-rotating axial flow fan satisfies the following two relationships: N≧P>M; and Lf/(Rf×π/N)≧1.25 and/or Lr/(Rr×π/P)≧0.83.
摘要翻译: 可以提供与现有技术相比具有改进的特性和降低的噪声的反向旋转轴流风扇。 将前刀片的数量定义为N,固定刀片的数量为M,后刀片的数量为P,并将前刀片的最大轴向弦长定义为Lf,后刀片的最大轴向弦长度为 Lr,前叶片的外径为Rf,后刀片的外径为Rr,反向旋转轴流风扇满足以下两种关系:N≥P> M; Lf /(Rf×&pgr; / N)≥1.25和/或Lr /(Rr×&pgr; / P)≥0.83。
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公开(公告)号:US08690528B2
公开(公告)日:2014-04-08
申请号:US12967200
申请日:2010-12-14
申请人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka, Sr. , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
发明人: Chisachi Kato , Atsushi Yamaguchi , Akira Ueda , Kazuhiro Nitta , Akihiro Otsuka, Sr. , Tadashi Katsui , Masahiro Suzuki , Yoshihiko Aizawa , Honami Oosawa
IPC分类号: F04D29/44
CPC分类号: F04D29/544 , F04D19/007 , F04D19/024 , F04D29/663
摘要: A counter-rotating axial flow fan in which the shape of stationary blades of a middle stationary portion is optimized to reduce noise is provided. Defining the maximum axial chord length of front blades as Lf, the maximum axial chord length of rear blades as Lr, and the maximum axial chord length of stationary blades as Lm, a relationship of Lm/(Lf+Lr) 5.8.
摘要翻译: 提供了一种反向旋转轴流风扇,其中中间静止部分的固定叶片的形状被优化以降低噪声。 将前刀片的最大轴向长度定义为Lf,后刀片的最大轴向弦长度为Lr,固定刀片的最大轴向弦长为Lm,满足Lm /(Lf + Lr)<0.14的关系。 定义固定叶片下表面的叶片和下表面之间的最大尺寸为K1,固定叶片的最大轴向弦长Lm满足Lm / K1> 5.8的关系。
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