A discontinuous air guide tube for an axial flow fan

Abstract

The invention relates to a discontinuous air guiding cylinder of an axial flow fan, comprising a motor (1) and an air guiding cylinder (5). A rotating disk (2) is fixedly connected to the rotating shaft of the motor (1), and a There are several fan blades (3) connected by bolts, and the fan blades (3) are placed in the air guide tube (5), and the upper and lower ends of the air guide tube (5) are formed with outwardly extending flanges (54). Bolt holes (55) are formed on (54), and annular slits (53) are formed on the wall of the air guide tube (5) facing the outer end of the fan blade (3), and the cut grooves (53) divide the air guide tube (5) be shaped into two cylinders up and down the air outlet tube (51) and the air inlet tube (51). The slots on the air guide tube facilitate convection between the positive and negative pressure areas formed by the rotation of the fan blades and the atmosphere, thereby reducing the loss of air volume and wind pressure, improving the working efficiency of the fan, and reducing the noise of the fan.

Description

Technical field: [0001] The present invention relates to the technical field of axial flow fans, and more specifically relates to a discontinuous air guide tube of axial flow fans. Background technique: [0002] The air guide tube has the function of guiding the flow direction of the wind, and is often used in conjunction with the fan. The wall of the existing air guide tube is generally continuous, that is, there is no channel for dividing the air guide tube on the wall, and its simple structure is as follows: figure 1 As shown: when the fan is working, the blades 3 in the air guide tube 5 rotate, and the wind direction a is upward, so that a positive pressure area b is generated at the outlet section of the air guide tube 5, and a negative pressure area is generated at the inlet section of the air guide tube 5 c, the airflow passes through the gap between the tip of the fan blade 3 (or the vane 4 at the tip of the vane) and the air guide tube 5 from the positive pressure ...

AI Technical Summary

Problems solved by technology

The wall of the existing air guide tube is generally continuous, that is, there is no channel for dividing the air guide tube on the wall, and its simple structure is as follows: figure 1 As shown: when the fan is working, the blades 3 in the air guide tube 5 rotate, and the wind direction a is upward, so that a positive pressure area b is generated at the outlet section of the air guide tube 5, and a negative pressure area is generated at the inlet section of the air guide tube 5 c, the airflow passes through the gap between the tip of the fan blade 3 (or the vane 4 at the tip of the vane) and the air guide tube 5 from the positive pressure zone b to the negative pressure zone c, that is, the phenomenon of internal leakage, and at the same time it will flow on the vane 4 Vortex is generated at the tail, which increases the resistance of the wind wheel. This not only reduces the efficiency of the fan, but also increases the noise of the fan

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