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Connecting element for connecting a blade to the hub in an industrial axial fan, and blade system comprising said connecting element

Inactive Publication Date: 2018-10-11
R E M HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a connecting element for industrial axial fans that can reduce the effects of unsteady loads on the blade system. The aim is to minimize the response of the blade system to alternated loads in general and in resonance condition in particular. The connecting element can force the blade to modify its modal properties, such as frequencies and deformation shapes, which can make the blade more resistant to unsteady loads. This results in a more stable and reliable blade system.

Problems solved by technology

These forces originate fatigue phenomena, therefore they are more dangerous for the blade life when compared to the steady forces.

Method used

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  • Connecting element for connecting a blade to the hub in an industrial axial fan, and blade system comprising said connecting element
  • Connecting element for connecting a blade to the hub in an industrial axial fan, and blade system comprising said connecting element
  • Connecting element for connecting a blade to the hub in an industrial axial fan, and blade system comprising said connecting element

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Embodiment Construction

[0090]With reference to the above mentioned Figures, the main task of the present invention is to provide a connecting element for connecting the airfoil profile to the hub of an industrial axial fan.

[0091]With reference to the above, the present invention concerns a connecting element 1 consisting of an extremely simple element, see for example FIGS. 5 to 7, having essentially a rectangular cross-section and a “L” shaped longitudinal-section comprising a first part 1a having a substantially straight develop and a second part 1b having a straight develop, said first 1a and second 1b part being connected by a linking part 1c presenting a curvature radius so that said first 1a and second 1b parts lie on substantially perpendicular planes.

[0092]Said first part 1a of the L-shaped profile, which is the shorter part, is apt to be connected to the hub 20 while said second part 1b, which is the longer part, is apt to be connected to the airfoil profile 10, said link part 1c connecting said ...

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Abstract

The present invention concerns a connecting element for connecting a blade, or airfoil profile, to the hub of an industrial axial fan, a blade system comprising said connecting element, and an industrial axial fan comprising such blade system. The connecting element (1) for connecting a blade (10) to the hub (20) of an industrial axial fan according to the present invention, is realized in a single L-shaped piece comprising a first part (1a) having a substantially straight develop and a second part (1b) having a substantially straight develop, said first (1a) and second (1b) part being connected by a linking part (1c) presenting a curvature radius, said first (1a) and second (1b) parts lying on substantially perpendicular planes. The connecting element according to the present invention allows to achieve several advantages with respect to the prior art, one of said advantages consisting of its extremely simple shape and manufacturing process, which render the connecting element economically advantageous.

Description

FIELD OF THE INVENTION[0001]The present invention concerns a connecting element for connecting a blade, or airfoil profile, to the hub of an industrial axial fan, a blade system comprising said connecting element, and an industrial axial fan comprising such blade system.[0002]The axial fans for industrial application typically comprise a hub and a plurality of airfoil profiles.[0003]A blade basically comprises two parts, the airfoil profile having the function to move the air, and the connecting element or attachment having the function to link the airfoil profile to the hub.[0004]Object of the present invention is the connecting element connecting the airfoil to the hub and the blade system comprising a blade, an hub and the connecting element according to the present invention.[0005]It is further an object of the present invention an industrial axial fan comprising such blade system.STATE OF THE ART[0006]In the field of axial fans, many different technical solutions are known for ...

Claims

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Application Information

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IPC IPC(8): F04D19/00F04D29/34F04D29/66
CPCF04D19/002F04D29/34F04D29/668F04D29/646F05B2230/24F05B2250/71F05B2270/1095F05B2280/10F05B2280/4003F05B2280/6003F05D2300/43F05D2250/71F05D2270/114F05D2300/603F05D2300/10F05D2230/24
Inventor MOSIEWICZ, ROBERTO EDUARDO
Owner R E M HLDG
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