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1. 发明授权

US5577888A High efficiency, low-noise, axial fan assembly 失效
标题翻译：高效率，低噪音，轴流式风机组装
公开(公告)号：US5577888A
公开(公告)日：1996-11-26
申请号：US493872
申请日：1995-06-23
申请人： Hugo Capdevila , Eric Bartlett , John Pharoah , William Gallivan
发明人： Hugo Capdevila , Eric Bartlett , John Pharoah , William Gallivan
IPC分类号： F04D19/00 , F04D29/32 , F04D29/38 , F04D29/54
CPC分类号： F04D19/002 , F04D29/325
摘要： A high efficiency fan and stator arrangement for generating an airflow through a heat exchanger is disclosed herein. The fan is rotated about its rotational axis by an electric motor, and includes eight blades extending radially from a hub to a circular band. Each fan blade has a stagger angle and chord lengths which vary along the span of the blades. Each fan blade also includes a trailing edge having a flat surface extending along the edge. The flat surfaces of each fan blade are coincident with a plane perpendicular to the rotational axis. The fan produces an airflow when rotated about the rotational axis, wherein a component of the airflow occurs at a first angle to the rotational axis. The fan support has a central bearing support and twenty elongated airfoils extending radially outward from the bearing support. Each airfoil has substantially the same length as the fan blades and includes a curved airflow guiding surface having a leading edge and a trailing edge downstream from the leading edge. The curve of the guiding surface is a generally circular arc with a tangent to the guiding surface at the leading edge substantially at the first angle to the rotational axis, and a tangent to the trailing edge at a second angle to the rotational axis less than the first angle. The fan support is located downstream of the heat exchanger to guide the airflow produced by the fan through the heat exchanger.
摘要翻译：本文公开了一种用于通过热交换器产生气流的高效率风扇和定子装置。风扇通过电动机绕其旋转轴线旋转，并且包括从轮毂径向延伸到圆形带的八个叶片。每个风扇叶片具有交错的角度和弦长度，其沿着叶片的跨度而变化。每个风扇叶片还包括具有沿边缘延伸的平坦表面的后缘。每个风扇叶片的平坦表面与垂直于旋转轴线的平面重合。当围绕旋转轴线旋转时，风扇产生气流，其中气流的分量以与旋转轴线成第一角度发生。风扇支撑件具有中心轴承支撑件和从轴承支撑件径向向外延伸的二十个细长翼型件。每个翼型件具有与风扇叶片基本相同的长度，并且包括弯曲的气流引导表面，其具有在前缘下游的前缘和后缘。引导表面的曲线是大致圆弧，其中前导边缘处的引导表面与旋转轴线基本上成第一角度的切线，并且与旋转轴线成小于第二角度的第二角度的后缘的切线第一角度风扇支撑件位于热交换器的下游，以引导由风扇产生的气流通过热交换器。

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