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A centrifugal volute outlet structure

A technology of outlet structure and volute, which is applied in the direction of non-variable pumps, pump components, components of pumping devices for elastic fluids, etc., and can solve the problems of fan air volume and noise performance deterioration

Active Publication Date: 2021-05-04
GUANGDONG SUNWILL PRECISING PLASITC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the overall air volume and noise of the fan deteriorates

Method used

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  • A centrifugal volute outlet structure
  • A centrifugal volute outlet structure
  • A centrifugal volute outlet structure

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Embodiment Construction

[0039] The invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] see Figure 1-Figure 4 , a centrifugal volute outlet structure, including a volute 1 and its air outlet 2, a transition surface 3 is provided at the connection between the air outlet 2 and the volute 1, and the distance between the transition surfaces 3 on the left and right sides of the volute 1 faces outward The tuyeres 2 gradually decrease to narrow the joint between the air outlet 2 and the volute 1 and form a section of accelerating air passage 4 in the volute 1 .

[0041] The air inlet passage 5 and the air outlet 2 of the volute 1 communicate with the acceleration air passage 4 respectively, and the inner diameter of the acceleration air passage 4 gradually decreases toward the air outlet 2 to gradually increase the velocity of the fluid in the acceleration air passage 4 .

[0042] The distance H between the left and right sides of the volute 1 >...

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Abstract

A centrifugal volute outlet structure, including the volute and its air outlet, the connection between the air outlet and the volute is provided with a transition surface, and the distance between the transition surfaces on the left and right sides of the volute gradually decreases toward the air outlet to narrow the air outlet. The connection between the tuyere and the volute, and a section of accelerated air duct is formed in the volute. The invention narrows the connection between the air outlet of the fan and the volute, and the acceleration trend in the radial direction of the flow channel at the air outlet end is enhanced, and the flow channel in the volute is accelerated along the narrowed wall surface to solve the original problem on the wall surface of the air outlet. The larger vortex area, and through the changed air outlet, the fluid flows to the accelerating air channel to the larger air outlet, that is, the fluid gradually accelerates in the accelerating air channel, and then flows to the larger air outlet, and the fluid accelerates to flow at the air outlet The accelerated flow channel is formed inside. After the accelerated flow channel, the kinetic energy in the radial direction is increased, the original vortex range is effectively reduced, and the occurrence of vortex is significantly improved, which is finally reflected in the improvement of the air volume and noise reduction of the fan.

Description

technical field [0001] The invention relates to a centrifugal fan, in particular to a centrifugal volute outlet structure. Background technique [0002] The working principle of centrifugal fan: In the centrifugal fan, Coriolis force, centrifugal force, lateral pressure and viscous force interact, the flow in the impeller is very complicated, and there are unstable flow phenomena such as boundary layer separation, secondary flow, and jet wake. The unsteady flow inside the impeller, geometric asymmetry, and the interaction of the flow path caused by the relative motion of the impeller and the volute's dynamic and static parts determine the unsteady flow characteristics inside the centrifugal fan, and this unsteady flow characteristic The existence of is the important cause of energy loss, reduced stability, noise and vibration. [0003] see Figure 6 , the conventional volute adopts the overall rectangular air duct setting, the wall thickness at the air outlet is consistent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/42F04D29/66
CPCF04D29/4226F04D29/667
Inventor 刘阳明李嘉盛罗伟乐王汉波覃万翔
Owner GUANGDONG SUNWILL PRECISING PLASITC CO LTD