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Axial flow fan

An axial flow, fan technology, applied in non-variable displacement pumps, components of pumping devices for elastic fluids, machines/engines, etc., can solve the problem of no airfoil section, no blade position and angle adjustment. problems, to achieve the effect of fewer parts and lower manufacturing costs

Inactive Publication Date: 2009-04-15
加蒂责任有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reduces cost, however it does not allow any adjustment of the position and angle of the blades relative to the hub
In addition, the blades of existing ceiling fans are flat blades without an airfoil profile

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0028] FIG. 2 shows an axial fan 30 of the present invention. The axial fan 30 includes a hub 31 on which blades 32 are mounted. The L-shaped strap 33 has a short segment 34 of concave shape which is directly bolted to the cylindrical outer surface of the hub 31 by means of bolts 35 and washers 36 . The long section 37 of the L-shaped strip 33 is partially bent and a slot-shaped opening 38 is provided. The curved portion of the long section 37 is inserted into the hollow blade 32 . It is also possible to mount long sections of the L-shaped straps on the outside of the blades. The filler member 47 is also inserted into the blade 32, and then, the bolt 39 is inserted, thereby connecting the L-shaped strap 33, the filler member 47 and the blade 32 together. The bolt 39 is fastened with a nut 40 and a washer 41 .

[0029] The hollow vanes 32 are closed with end caps 42 and 43 .

[0030] Finally, the closure plate 44 is attached to the hub 31 by means of bolts 45 and washers 4...

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PUM

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Abstract

The invention relates to an axial flow type fan which comprises a hub and a plurality of blades that are evenly distributed on the hub, wherein, the blade are provided with a wing-shaped profiles and each blade is installed on the hub by torsades, wherein, each blade is hollow; moreover, at least part of the torsade is inserted into the blade, and at least one fastener passes through a corresponding opening in the torsade and reaches an opposite blade surface from the blade surface, wherein, the corresponding opening in the torsade is a narrow groove, therefore, the inclination angle of the blade can be adjusted by rotating blades relative to the torsades and along the axial lines of the blades.

Description

technical field [0001] The invention relates to an axial flow fan, which comprises a hub and a plurality of blades evenly distributed and arranged on the hub, wherein the blades have airfoil section. Such blades typically have a diameter of 5 meters. For directing the air flow, such a fan is located in a ring, which preferably has a bell-shaped inlet. Background technique [0002] Such fans are well known and the market is highly competitive. Even a small reduction in cost can lead to an increase in market share. [0003] This known fan has a very large number of components, some of which are expensive to manufacture. [0004] Fig. 1 shows an exploded view of a fan in the prior art. The fan comprises a hub 1 on which a mounting plate 2 is mounted. The connection between the mounting plate 2 and the hub 1 is realized through six bolts 3 , washers 4 and bushings 5 ​​. Each blade 6 having an airfoil profile is mounted on the mounting plate 2 . For this connection, a cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/38F04D29/34
Inventor H·J·B·奥特霍夫G·奇佩莱蒂H·F·范德斯佩克
Owner 加蒂责任有限公司
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