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Blade of axial flow fan and manufacturing method of blade

An axial flow fan, fan blade technology, applied in mechanical equipment, machine/engine, liquid fuel engine, etc., can solve problems such as noise increase, performance degradation, fan blade deformation, etc., to improve service life and improve wear resistance. Ability, stable effect of aerodynamic performance

Inactive Publication Date: 2016-02-03
WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a high-reliability axial flow fan blade, which can effectively solve the deformation of the blade, increase the noise, and reduce the performance caused by the stress release of the steel blade. problems, thereby improving the performance and operational reliability of mine axial flow fans, and prolonging the service life of fan blades

Method used

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  • Blade of axial flow fan and manufacturing method of blade
  • Blade of axial flow fan and manufacturing method of blade
  • Blade of axial flow fan and manufacturing method of blade

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Embodiment 1

[0029] Such as Figure 1-3 As shown: the high-reliability fan blade used in the mine axial flow fan of the present invention includes a steel fan blade casing 1 with a shuttle-shaped cross section, and corresponding rivets are arranged on the P surface and the S surface of the casing 1 hole 5, such as figure 2 As shown, the maximum height part of the inner cavity of the shuttle-shaped housing 1, that is, the thickest part of the fan blade, is biased towards the windward side a of the fan blade and away from the leeward side b, forming a left-right asymmetrical shuttle-shaped cross section. The body 1 is filled with a foam filling body 2, and the windward side of the fan blade, that is, the centrifugal end of the side edge a in the figure, has a partial surfacing structure 3, and the joint of the surfacing structure 3 and the shell 1 has a side a The slope structure 4 with a certain included angle, and the other joint surface is parallel to the side a, that is, the surfacing ...

Embodiment 2

[0038] The difference between this embodiment and the first embodiment lies in that the joint between the surfacing structure 3 and the casing 1 is a zigzag structure, the length of its long side is 150 mm, accounting for 1 / 2 of the length of the fan blade, and the width is 3 mm. The weight ratio of isocyanate and polyether in the foaming agent is 1:1.5, and the filling amount thereof is such that the foaming volume of the foaming agent is 6 times the volume of the inner cavity of the leaf shell. The working pressure of the molding die after filling the blowing agent is 180 tons.

[0039] The difference between this embodiment and the first embodiment lies in that the joint between the surfacing structure 3 and the casing 1 is a zigzag structure, the length of its long side is 180 mm, accounting for 1 / 3 of the length of the fan blade, and the width is 4 mm. The weight ratio of isocyanate and polyether in the foaming agent is 1:1.2, and the filling amount thereof is such that t...

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Abstract

The invention discloses a blade of an axial flow fan and a manufacturing method of the blade. The blade comprises a housing of which the cross section is shuttle-shaped, wherein the highest part of the shuttle shape, namely, the thickest part of the blade, is deviated to a windward side of the blade; the housing is filled with a foaming filling body. According to the blade of the axial flow fan, the shuttle-shaped housing is adopted and meets the airflow theory; meanwhile, the housing is filled with a foaming agent which can expand in the closed housing and fully fill a cavity in the closed housing, and the solidified foaming agent can form a solid-core body through which a molded line of the blade can be solidified and a large force for outwards supporting the housing can be applied to the housing, so that the blade cannot be deformed when the fan runs, and as a result, the stability of pneumatic performances of the fan can be effectively ensured, the noise can be reduced, and the service life of the blade can be protected. The blade is simple in structure, simple and convenient to construct, stable and reliable in performances, and long in service life. The manufacturing method of the blade is simple and convenient, and the operation is easily carried out.

Description

technical field [0001] The invention belongs to the technical field of axial flow fans, and in particular relates to a fan blade of an axial flow fan and a manufacturing method thereof. Background technique [0002] At present, solid dust and vibration are common in the operation of mine axial flow fans. Due to dust friction and equipment environment vibration and other harsh conditions, after 2 to 3 years of fan operation, the steel fan blades often have blade head edge welding. Due to problems such as seam wear and cracking, stress release deformation, etc., the noise of the fan increases, the performance changes, and the reliability decreases, which seriously affects the safety and stability of the fan operation. Contents of the invention [0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a high-reliability axial flow fan blade, which can effectively solve the deformation of the blade, increase the n...

Claims

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Application Information

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IPC IPC(8): F04D29/38F04D29/66B23P15/04
Inventor 邢印白照昊庞浩磊秦红河左燕峰张海红焦华勇
Owner WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD