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A multi-blade centrifugal fan blade, impeller and a multi-blade centrifugal fan

A centrifugal fan and airfoil blade technology, which is applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve the problems of small separation loss of blade trailing edge, small inlet impact loss, small no bending angle, etc., and achieve reduction Inlet impact loss and blade trailing edge separation loss, effect of optimal aerodynamic performance

Active Publication Date: 2021-11-26
FANS TECH ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the application provides a multi-blade centrifugal fan blade, impeller and a multi-blade centrifugal fan, which solve the existing technical problems of blades with small bending angles, small inlet impact losses and small separation losses of blade trailing edges

Method used

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  • A multi-blade centrifugal fan blade, impeller and a multi-blade centrifugal fan
  • A multi-blade centrifugal fan blade, impeller and a multi-blade centrifugal fan
  • A multi-blade centrifugal fan blade, impeller and a multi-blade centrifugal fan

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[0034] The above is the first embodiment of a multi-blade centrifugal fan blade provided by the embodiment of the present application, and the following is the second embodiment of a multi-blade centrifugal fan blade provided by the embodiment of the present application.

[0035] see figure 1 , a structural schematic diagram of a multi-blade centrifugal fan blade in an embodiment of the present application, including: an airfoil blade part 1 and an arc-shaped blade part 2; the tail end 3 of the airfoil blade part and the head end 4 of the arc-shaped blade part connect.

[0036] In order to make the performance of the blade better, the length d of the arc-shaped blade part 2 should not be too long, and the length d of the arc-shaped blade part 2 and the length D of the airfoil blade part 1 have the following relationship: h for

[0037] Further, h is specifically

[0038] Further, the airfoil blade part 1 and the arc-shaped blade part 2 are integrally formed.

[0039] ...

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Abstract

The application discloses a multi-blade centrifugal fan blade, an impeller and a multi-blade centrifugal fan, wherein the multi-blade centrifugal fan blade includes: an airfoil blade part and an arc-shaped blade part; the tail end of the airfoil blade part and The head ends of the arc-shaped blade parts are connected. In this application, the multi-wing centrifugal fan blades are designed as airfoil blades and arc-shaped blades. By adjusting the arc-shaped blades, the blade inlet and outlet angles can be adjusted freely. The bending angle of the blade will not be too large, and the airfoil blade part can reduce the inlet impact loss and blade trailing edge separation loss of the arc-shaped blade part, thereby reducing the inlet impact loss and blade trailing edge separation loss of the entire blade, The blade satisfies the optimal aerodynamic performance, and solves the technical problems of existing blades with no small bending angle, small inlet impact loss and small separation loss of the blade trailing edge.

Description

technical field [0001] The application belongs to the technical field of fans, and in particular relates to a multi-blade centrifugal fan blade, an impeller and a multi-blade centrifugal fan. Background technique [0002] The blade angle at the inlet and outlet of the multi-blade centrifugal fan has a great influence on the performance of the fan. The impeller of the existing multi-blade centrifugal fan mostly adopts the design of equal-thickness circular arc blade. This method can adjust the angle of the inlet and outlet blades arbitrarily to meet the aerodynamic performance of different fans. . [0003] However, the equal-thickness arc blade has the disadvantages of large airflow impact loss at the inlet and severe separation loss of the blade trailing edge, which makes it difficult to obtain better aerodynamic performance. The airfoil blade structure can reduce the impact loss of the airflow at the inlet and the separation loss of the blade trailing edge, and its aerodyn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/30F04D29/28
CPCF04D29/283F04D29/30
Inventor 贾海军陈宗华
Owner FANS TECH ELECTRIC CO LTD
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