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Volute-free centrifugal ventilator

A centrifugal fan without a volute, which is applied in the direction of mechanical equipment, machines/engines, liquid fuel engines, etc. It can solve the problems of dynamic balance correction accuracy deviation and inaccurate positioning of impeller balance pieces, so as to strengthen rigidity and prevent impeller The effect of deformation and uniform radial clearance

Pending Publication Date: 2019-07-05
浙江科贸智能机电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, when the impeller dynamic balance correction is carried out in a weighted way, it is necessary to drill holes in specific parts of the impeller disc or blades and then increase the weight, or weld the balance weight to achieve dynamic balance. , will cause the deformation of the impeller and the inaccurate positioning of the balance sheet, resulting in deviations in the accuracy of dynamic balance correction

Method used

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  • Volute-free centrifugal ventilator
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  • Volute-free centrifugal ventilator

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Experimental program
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Embodiment Construction

[0038] The number of blades of impeller 2 of centrifugal fan without volute of the present invention is 7, and its outlet diameter is: D 2 =355mm, outer diameter D of impeller 2 3 =406mm, the series of through holes 211 evenly distributed near the outer diameter of the front disc 21 of the impeller, and the series of through holes 231 evenly distributed near the outer diameter of the rear disc 23, the diameters of which are d=5.2mm, and the rivets with a diameter of 5 mm Matching, the number is 21, and the diameter of the circle where the center is located is DP 1 =DP 2 =380mm, greater than the blade outlet diameter of 355mm.

[0039] The air inlet is stretched and formed by sheet metal, the axial height is: H=64mm, and the flow stabilization section of the improved design is as follows:

[0040] The axial height is: h=12.8mm, ie h / H=0.2,

[0041] Angle J 1 =114°,

[0042] Angle J 2 =157°,

[0043] Angle J 3 =125°,

[0044] Angle J 4 =168°,

[0045] Moreover, the ang...

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Abstract

The invention aims to provide a volute-free centrifugal ventilator. The volute-free centrifugal ventilator comprises a motor, an impeller, an air inlet, a support and a panel, wherein the motor comprises a stator and a rotor, one end of the support is fixedly connected with the panel, and the other end of the support is fixedly connected with the stator of the motor; the rotor of the motor is connected with the impeller, a front disc of the impeller is matched with a sleeve opening of the air inlet, and an inlet end of the air inlet is fixedly connected with the panel; and the impeller comprises a rear disc, blades and the front disc, the blades are arranged between the front disc and the rear disc of the impeller, the rear disc, the blades and the front disc of the impeller are fixedly connected, a series of small holes used for mounting a balance piece are formed in the positions, close to the outer diameter portions, of the front disc and the rear disc, so that the balance piece isadditionally arranged on the impeller conveniently, and rapid and accurate dynamic balance correction can be realized. Meanwhile, due to the improvement of molded lines of the air inlet, especially asuction inlet, the efficiency of the ventilator is effectively improved, and the inlet noise is reduced.

Description

technical field [0001] The invention relates to the technical field of ventilators, in particular to a centrifugal ventilator without a volute. Background technique [0002] The volute backward centrifugal fan driven by the outer rotor motor is directly driven by the motor and the fan. The structure of the whole machine is compact, which can greatly save the occupied space. The structure can effectively reduce the power consumption and noise of this type of ventilator. [0003] The impeller of the low-pressure centrifugal fan has a certain axial width, and its dynamic balance correction adopts the method of double-sided correction. Usually, when the impeller dynamic balance correction is carried out in a weighted way, it is necessary to drill holes in specific parts of the impeller disc or blades and then increase the weight, or weld the balance weight to achieve dynamic balance. , it will cause the deformation of the impeller and the inaccurate positioning of the balance ...

Claims

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Application Information

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IPC IPC(8): F04D25/08F04D29/28F04D29/66F04D29/42F04D29/44
CPCF04D25/08F04D29/281F04D29/662F04D29/4213F04D29/441F04D29/666F04D29/667
Inventor 裘霖富徐天赐张职锋马杰凯刘伟
Owner 浙江科贸智能机电股份有限公司