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Large axial flow impeller with toothed leading edge blades

An axial flow impeller and blade technology, applied in the field of axial flow fans, can solve the problems affecting the aerodynamic performance of the impeller, impeller noise, etc., and achieve the effects of excellent aerodynamic performance, low resistance and novel structure

Active Publication Date: 2016-04-27
WEIHAI CREDITFAN VENTILATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, the existing large-scale axial flow impeller is composed of the hub and the blades around the hub. Some of the blades are variable-section blades, and some are equal-section blades. , the advantage of this structure is: when the airflow hits the blade vertically, it can achieve the effect of reducing the airflow resistance. Its disadvantage is: when the impeller rotates, the airflow deviates outward under the action of centrifugal force, so that the blade spans to meet the airflow impact. The impeller rotates to form a large airflow resistance, and at the same time, it also brings noise to the impeller, which greatly affects the aerodynamic performance of the impeller

Method used

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  • Large axial flow impeller with toothed leading edge blades
  • Large axial flow impeller with toothed leading edge blades
  • Large axial flow impeller with toothed leading edge blades

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Example: Take the impeller of φ1830, and pass the comparative test of the straight leading edge blade and the serrated blade leading edge blade, set the height of the impeller blade leading angle of attack 4 as H, the width of the blade as B, and the apex angle of the leading angle of attack as a , the angle between the leading edge and the height of the leading angle of attack is a1, and the angle between the trailing edge and the height is a2. The specific test steps are as follows: 1. Fully open the adjustment door,

[0020] 2. Turn on the power switch, adjust the power supply voltage and frequency according to the requirements of the motor, and test run the fan to ensure that the direction of operation is correct.

[0021] 3. Run the fan and observe the motor tester. When the frequency reaches the rated frequency, adjust the power supply voltage to make it reach the rated voltage. When the voltage jumps ±5V, check the current value of the motor tester.

[0022] 4. I...

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Abstract

The invention relates to the technical field of axial flow fans, in particular to a large axial flow impeller with toothed leading edge blades, including a hub and blades, characterized in that the windward side of the blade is serrated, and the windward The angles are arranged in sequence along the windward straight edge of the blade. The guide angle of attack is an isosceles triangle. The direction of the bias flow under action is corresponding, and the present invention has the advantages of novel structure, small resistance, low noise, high total pressure efficiency, and excellent aerodynamic performance due to the adoption of the above structure.

Description

technical field [0001] The invention relates to the technical field of axial flow fans, in particular to a large axial flow impeller with toothed leading edge blades. Background technique [0002] As we all know, the existing large-scale axial flow impeller is composed of the hub and the blades around the hub. Some of the blades are variable-section blades, and some are equal-section blades. , the advantage of this structure is: when the airflow hits the blade vertically, it can achieve the effect of reducing the airflow resistance. Its disadvantage is: when the impeller rotates, the airflow deviates outward under the action of centrifugal force, so that the blade spans to meet the airflow impact. As a result, the impeller rotates to form a large airflow resistance, and at the same time, it also brings noise to the impeller, which greatly affects the aerodynamic performance of the impeller. Contents of the invention [0003] The purpose of the present invention is to solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/38F04D29/32
Inventor 盛才良徐超孔宪良赵龙武
Owner WEIHAI CREDITFAN VENTILATOR
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