CN102635573A - Tooth-shaped trailing edge axial flow fan - Google Patents

Abstract

Translated fromChinese

本发明公开了一齿形尾缘轴流风扇。现有风扇的降噪效果不是很好。本发明包括机匣、电机固定架、电机、轮毂、齿形尾缘叶片，齿形尾缘叶片沿周向等间距安装在轮毂上，轮毂通过旋转轴与电机相连接，电机固定在电机固定架上，电机固定架固定在机匣内。本发明从整体上减少了附面层分离区，且齿形尾缘叶片上的锯齿将强集中涡分割离散成若干小涡,从而降低了边界层湍流强度,改善了边界层的湍流状况，从而达到减弱叶片尾迹和降低噪音的目的。

The invention discloses a toothed trailing edge axial flow fan. The noise reduction effect of the existing fan is not very good. The invention includes a casing, a motor fixing frame, a motor, a wheel hub, and toothed trailing edge blades, the toothed trailing edge blades are installed on the wheel hub at equal intervals along the circumference, the wheel hub is connected with the motor through a rotating shaft, and the motor is fixed on the motor fixing frame On, the motor holder is fixed in the casing. The present invention reduces the separation area of the boundary layer as a whole, and the serrations on the toothed trailing edge blades divide the strong concentrated vortex into several small vortices, thereby reducing the turbulence intensity of the boundary layer and improving the turbulent state of the boundary layer, thus To achieve the purpose of weakening the blade wake and reducing noise.

Description

Translated fromChinese

一种齿形尾缘轴流风扇A toothed trailing edge axial flow fan

技术领域technical field

本发明属于散热设备技术领域，尤其涉及一种齿形尾缘轴流风扇，该轴流风扇具有齿形化尾缘叶片。The invention belongs to the technical field of heat dissipation equipment, and in particular relates to a toothed trailing edge axial flow fan, which has toothed trailing edge blades.

背景技术Background technique

小型轴流风扇使用方便、成本低，被广泛的用于民用和商用的散热通风。近几年，由于计算机行业的飞速发展和人们生活水平的提高，高性能、低噪声的小型轴流风扇成为散热的首选，改变风扇的转子叶片形状来降噪是一种切实有效的方法，合理的叶片形状可以有效的降低风扇的噪声。Small axial flow fans are easy to use and low in cost, and are widely used in residential and commercial heat dissipation and ventilation. In recent years, due to the rapid development of the computer industry and the improvement of people's living standards, small axial fans with high performance and low noise have become the first choice for heat dissipation. Changing the shape of the fan's rotor blades to reduce noise is an effective and reasonable method. The blade shape can effectively reduce the noise of the fan.

发明内容Contents of the invention

本发明的目的是针对现有技术的不足，提供一种齿形尾缘轴流风扇，通过优化叶片的结构，改变尾缘形状而设计出一种新型的微小型轴流风扇。The purpose of the present invention is to provide a toothed trailing edge axial flow fan aimed at the deficiencies of the prior art. By optimizing the structure of the blades and changing the shape of the trailing edge, a new type of miniature axial flow fan is designed.

本发明包括机匣、电机固定架、电机、轮毂、齿形尾缘叶片，齿形尾缘叶片沿周向等间距安装在轮毂上，轮毂通过旋转轴与电机相连接，电机固定在电机固定架上，电机固定架固定在机匣内。The invention includes a casing, a motor fixing frame, a motor, a wheel hub, and toothed trailing edge blades, the toothed trailing edge blades are installed on the wheel hub at equal intervals along the circumference, the wheel hub is connected with the motor through a rotating shaft, and the motor is fixed on the motor fixing frame On, the motor holder is fixed in the casing.

所述的齿形尾缘叶片具有尾缘齿形化结构。The toothed trailing edge blade has a toothed trailing edge structure.

本发明有益效果如下：The beneficial effects of the present invention are as follows:

本发明从整体上减少了附面层分离区，且齿形尾缘叶片上的锯齿将强集中涡分割离散成若干小涡,从而降低了边界层湍流强度,改善了边界层的湍流状况，从而达到减弱叶片尾迹和降低噪音的目的。The present invention reduces the separation area of the boundary layer as a whole, and the serrations on the toothed trailing edge blades divide the strong concentrated vortex into several small vortices, thereby reducing the turbulence intensity of the boundary layer and improving the turbulent state of the boundary layer, thus To achieve the purpose of weakening the blade wake and reducing noise.

附图说明Description of drawings

图1是本发明安装示意图；Fig. 1 is a schematic diagram of installation of the present invention;

图2是本发明和普通风扇的不同时刻声压等级分布；Fig. 2 is the sound pressure level distribution of the present invention and common fan at different times;

图中，机匣1、电机固定架2、电机3、轮毂4、齿形尾缘叶片5。Among the figure, casing 1, motor fixing frame 2,motor 3, wheel hub 4, toothed trailing edge blade 5.

具体实施方式Detailed ways

下面结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.

如图1 所示，一种齿形尾缘轴流风扇，包括机匣1、电机固定架2、电机3、轮毂4、齿形尾缘叶片5，齿形尾缘叶片5沿周向等间距安装在轮毂4上，轮毂4通过旋转轴与电机3相连接，电机3固定在电机固定架2上，电机固定架2固定在机匣1内。As shown in Figure 1, a toothed trailing edge axial flow fan includes a casing 1, a motor fixing frame 2, amotor 3, a hub 4, and a toothed trailing edge blade 5, and the toothed trailing edge blades 5 are equally spaced along the circumference Installed on the wheel hub 4, the wheel hub 4 is connected with themotor 3 through the rotating shaft, themotor 3 is fixed on the motor fixing frame 2, and the motor fixing frame 2 is fixed in the casing 1.

所述的齿形尾缘叶片5具有尾缘齿形化结构。The toothed trailing edge blade 5 has a toothed trailing edge structure.

本发明工作时，气体从进风口轴向进入叶轮，与没有锯齿的叶片相比，尾缘叶片加上锯齿后变为齿形尾缘叶片5，齿形尾缘叶片5的齿根部位提前于齿尖，改变了尾缘叶片区的压力分布状态，使得齿形尾缘叶片5压力面侧的高压气流部分提前流向叶片低压面，造成局部压力升高，使得压力升高而产生的附面层分离局限在齿根部位，如图2所示，本发明从整体上减少了附面层分离区，从而达到减弱叶片尾迹和降低噪音的目的。When the present invention works, the gas axially enters the impeller from the air inlet. Compared with the blade without sawtooth, the trailing edge blade becomes a toothed trailing edge blade 5 after adding serrations, and the root position of the toothed trailing edge blade 5 is ahead of time. The tip of the tooth changes the pressure distribution state of the trailing edge blade area, so that the high-pressure air flow on the pressure surface side of the tooth-shaped trailing edge blade 5 flows to the low-pressure surface of the blade in advance, causing the local pressure to rise, and the boundary layer generated by the pressure rise The separation is limited to the root of the tooth, as shown in Figure 2, the present invention reduces the boundary layer separation area as a whole, so as to achieve the purpose of weakening the wake of the blade and reducing noise.

Claims (1)

Translated fromChinese

1. 一种齿形尾缘轴流风扇，包括机匣、电机固定架、电机、轮毂、齿形尾缘叶片，其特征在于：1. A toothed trailing edge axial flow fan, comprising casing, motor fixing frame, motor, wheel hub, toothed trailing edge blade, is characterized in that:齿形尾缘叶片沿周向等间距安装在轮毂上，轮毂通过旋转轴与电机相连接，电机固定在电机固定架上，电机固定架固定在机匣内；The toothed trailing edge blades are installed on the hub at equal intervals along the circumference, the hub is connected to the motor through the rotating shaft, the motor is fixed on the motor fixing frame, and the motor fixing frame is fixed in the casing;所述的齿形尾缘叶片具有尾缘齿形化结构。The toothed trailing edge blade has a toothed trailing edge structure.

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