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A Method for Modeling and Production Forming of Axial Fan Blades Based on Hollow Machine Airfoil

An axial flow fan and airfoil technology, applied in the field of 3D modeling of blades, can solve problems such as increased steps, problems, and long software calculations, and achieves the effect of convenient cleaning operation and reduced cleaning difficulty

Active Publication Date: 2020-06-26
ZHEJIANG SHANGFENG SPECIAL BLOWER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steps to establish the blade part are as follows: draw the A-A and B-B cross-sectional sketches respectively —> surface lofting —> extension surface —> closed surface —> clipping surface —> thickening —> shelling and other steps, the whole process has more steps and several steps There are often problems when generating, or the software takes a long time to calculate

Method used

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  • A Method for Modeling and Production Forming of Axial Fan Blades Based on Hollow Machine Airfoil
  • A Method for Modeling and Production Forming of Axial Fan Blades Based on Hollow Machine Airfoil
  • A Method for Modeling and Production Forming of Axial Fan Blades Based on Hollow Machine Airfoil

Examples

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Embodiment 1

[0033] A method based on the modeling and production of hollow airfoil axial flow fan blades, such as figure 1Select the newly added section of the D0 section as shown, name it C-C, and its distance from the A-A section is G, and the position of the C-C section has completely exceeded the front disk of the impeller, so the model established through the A-A and C-C sections will be completely consistent with the front disk Intersect, and complete leaves can be obtained after doing Boolean operations;

[0034] like figure 2 As shown, the data of the A-A and -B-B sections are known, and the distance between the B-B section and the A-A section is H, and the distance between the C-C section and the A-A section is G. It is also known; first calculate the F of the third section C-C, according to Triangular similarity or equal tangents yields: , where F is the desired item, which can be obtained by derivation ; After calculating the F value, the above method can be used to obtai...

Embodiment 2

[0052] A method based on the modeling and production of hollow airfoil axial flow fan blades, such as figure 1 Select the newly added section of the D0 section as shown, name it C-C, and its distance from the A-A section is G, and the position of the C-C section has completely exceeded the front disk of the impeller, so the model established through the A-A and C-C sections will be completely consistent with the front disk Intersect, and complete leaves can be obtained after doing Boolean operations;

[0053] like figure 2 As shown, the data of the A-A and -B-B sections are known, and the distance between the B-B section and the A-A section is H, and the distance between the C-C section and the A-A section is G. First calculate the F of the third section C-C, according to the triangle similarity or equal tangent value can be obtained: , where F is the desired item, which can be obtained by derivation . After calculating the F value, the above method can be used to obtai...

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Abstract

The invention discloses a modeling and production forming method based on a hollow wing type axial flow fan blade, and the method comprises the steps: a, selecting two profiles of a starting sketch ofa fan impeller, and dividing the two profiles into A-A and B-B; b, determining that the third section position is an impeller inlet D0 section as a C-C section position; c, deducing data on a C-C section through the A-A section data, the B-B section data and the section distance; and d, using the A-A and C-C section data to return the blade section sketch, and modeling.

Description

technical field [0001] The invention belongs to the technical field of blade 3D modeling, and in particular relates to a method for modeling and producing a blade of an axial flow fan based on a hollow airfoil. Background technique [0002] With the development of computer technology, the three-dimensional model of the impeller will be used to analyze the strength, stiffness, and mode when designing the impeller. The efficiency and accuracy of impeller modeling have a certain impact on the design. [0003] For 4-73 impeller modeling, the commonly used method is to model through two sections A-A and B-B. The steps to establish the blade part are as follows: draw the A-A and B-B cross-sectional sketches respectively —> surface lofting —> extension surface —> closed surface —> clipping surface —> thickening —> shelling and other steps, the whole process has more steps and several steps There are often problems when generating, or the software takes a long tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06T17/00
CPCG06T17/00
Inventor 张立平徐淑君倪忠琦
Owner ZHEJIANG SHANGFENG SPECIAL BLOWER IND CO LTD