Volute

Abstract

The invention provides a volute. The volute comprises a volute rear plate and a volute front plate, wherein the volute rear plate and the volute front plate are both in volute shapes and both providedwith volute holes, the volute holes are eccentrically arranged in the volute rear plate and the volute front plate, the volute holes in the volute rear plate are fixedly provided with a motor installation rack, in order to install the motor installation rack, the strength of the volute rear plate is increased, the volute rear plate is provided with reinforcing ribs, the reinforcing ribs are in block shapes and arranged along the volute holes of the volute rear plate, the motor installation rack can be made to be steadily installed on the volute rear plate, the peripheries of the volute rear plate and the volute front plate are fixedly provided with a volute enclosing plate, the volute rear plate, the volute front plate and the volute enclosing plate form one air outlet, the air outlet isfixedly provided with a volute flange plate which is used for the volute to be connected with an external device, the volute is provided with a downward convex segment, by means of the arrangement ofthe downward convex segment, the height of a distance A from the lower edges of the volute holes to the lower surface of the volute is made to be increased, and the air amount of the air outlet is increased.

Description

technical field [0001] The invention belongs to the technical field of ventilation equipment for driving air flow, and relates to a volute used in conjunction with centrifugal fan blades. Background technique [0002] The quality and performance of the volute and centrifugal fan used in ventilation equipment are closely related to the inner cavity profile of the volute and the matching centrifugal fan blade shape. How to design the inner cavity profile of the volute is very important , the inner cavity profile design of the volute in the ideal solution will lead to an increase in the air volume of the ventilation equipment, but a reduction in the noise value; at present, the volute that matches the centrifugal fan blade generally adopts an involute helix internal cavity profile, and for the interception The selected section of helix has different parameters, resulting in uneven performance; [0003] Chinese Invention Patent No. ZL201510843424.9 discloses the structure of "a...

AI Technical Summary

Problems solved by technology

[0002] The quality and performance of the volute and centrifugal fan used in ventilation equipment are closely related to the inner cavity profile of the volute and the matching centrifugal fan blade shape. How to design the inner cavity profile of the volute is very important , the inner cavity profile design of the volute in the ideal solution will lead to an increase in the air volume of the ventilation equipment, but a reduction in the noise value; at present, the volute that matches the centrifugal fan blade generally adopts an involute helix internal cavity profile, and for the interception The parameters of which section of helix is ​​selected vary in thousands of ways, resulting in uneven performance;

[0003] Chinese Invention Patent No. ZL201510843424.9 discloses the structure of "a volute for range hood"; The second volute line, the third volute line, the fourth volute line, the fifth volute line, and the five volute lines divide the volute tongue into four sections, namely the first volute section, the The second volute section, the third volute section, and the fourth volute section, the windward area of ​​the second volute section is greater than the windward area of ​​the first volute section, and the windward area of ​​the third volute section is greater than that of the fourth volute section The windward area, so it can effectively improve the pulse vibration of the volute tongue, reduce the air vortex at the air outlet, and make the noise of the range hood lower and the vortex less; the disadvantage is that although such a structure can reduce the centrifugal fan's Noise, but such a structure will also reduce the air output of the centrifugal fan

At present, a volute with simple structure, large air volume and low noise has not been developed.

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