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a hollow leaf

A hollow vane, vane technology, applied in non-variable displacement pumps, pump components, components of pumping devices for elastic fluids, etc., can solve the wake loss, damage the aerodynamic and acoustic performance of the vane, and aggravate the airflow boundary Layer separation and other issues to achieve the effect of reducing wake loss

Active Publication Date: 2021-04-06
FANS TECH ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the blades in the prior art are usually made by bending one plate, and the two ends of the plate are welded to each other, which will damage the aerodynamic performance and acoustic performance of the blade, aggravate the separation of the boundary layer of the airflow, and cause excessive wake loss

Method used

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Please refer to Figure 1 to Figure 4 , figure 1 It is a structural schematic diagram of the first specific embodiment of the hollow blade provided by the present invention; figure 2 It is a schematic stru...

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PUM

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Abstract

The invention discloses a hollow blade used for a centrifugal fan impeller, comprising a first blade forming a pressure surface and a second blade forming a suction surface, the rear end of the first blade and / or the second blade has a With the connecting parts connected to each other, the thickness of the connecting parts gradually decreases from front to back. The rear end of at least one of the first blade plate and the second blade plate of the hollow blade provided by the present invention is provided with a connecting portion, and the thickness of the rear end of the connecting portion is relatively thin, so that after the first blade plate is connected with the second blade plate, the rear end of the hollow blade The thickness of the edge is thinner, thereby reducing the wake loss of the hollow blade.

Description

technical field [0001] The invention relates to the technical field of fluid machinery, in particular to a hollow blade. Background technique [0002] The blades of the hollow structure have the advantages of light weight and high strength, which can reduce the weight of the fan and reduce the energy consumption of the fan. However, the blades in the prior art are usually made by bending a plate, and the two ends of the plate are welded to each other, which will damage the aerodynamic performance and acoustic performance of the blade, aggravate the separation of the boundary layer of the airflow, and cause excessive wake loss. [0003] Therefore, how to reduce the wake loss of the hollow blade is a technical problem to be solved by those skilled in the art. Contents of the invention [0004] It is an object of the present invention to provide a hollow blade with a thinner trailing edge and less wake loss. [0005] To achieve the above object, the present invention provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/30F04D29/28F04D29/66
CPCF04D29/281F04D29/30F04D29/666
Inventor 陈宗华袁小永
Owner FANS TECH ELECTRIC CO LTD
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