Centrifugal fan with vane guide grooves for noise reduction

A technology of centrifugal fan and diversion groove, which is applied to components, mechanical equipment, machines/engines, etc. of pumping devices used for elastic fluids, and can solve problems such as difficulty in reducing fan noise and complex eddy current parameters, and achieve noise reduction effects Good, area and intensity reduction, eddy current noise reduction effect

Inactive Publication Date: 2015-04-22
FOSHAN HECAI TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although people have a relatively clear understanding of fan eddy current noise, due to the complexity of eddy current parameters, there is no theoretical formula or technical solution that can guide the actual fan design. Eddy current noise has always been a difficult problem to reduce fan noise

Method used

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  • Centrifugal fan with vane guide grooves for noise reduction
  • Centrifugal fan with vane guide grooves for noise reduction
  • Centrifugal fan with vane guide grooves for noise reduction

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0027] like Figure 1 to Figure 4 As shown, a centrifugal fan with blade guide grooves for noise reduction, including a base 1, a volute 2, a motor 3 and a wind wheel 4, the motor 3 is a double-extended shaft four-pole motor, and its two transmission shafts 301 are respectively fixed The wind wheel 4 in the volute 2, the volute 2 and the motor 3 are fixed on the base 1, and the installation angle A of the blade 410 of the wind wheel 4 is 30°-40°, such as Image 6 As shown, the blade 410 includes a main body 411 and mounting parts 412 arranged at both ends of the main body 411. The main body 411 is made of a rectangular raw material with one long side as the center line, and the two wide sides are reversely rotated. The length of the wide side is 90-100mm, and the length of the wide side is 18-24mm,...

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Abstract

The invention relates to the technical field of air supplying equipment, and specifically relates to a centrifugal fan with vane guide grooves for noise reduction. The centrifugal fan comprises a base, a volute, a motor and wind wheels. The motor is a double-extension-shaft quadrupole motor. Two transmission shafts of the motor are respectively fixed to the wind wheels in the volute. The volute and the motor are fixed on the base. Each vane of each wind wheel includes a main body and mounting portions arranged at two ends of the main body. The main body of the vane is made of a rectangular raw material in a manner that by the long side of the rectangular raw material is used as a central line and the two wide sides are rotated in opposite directions. A plurality of guide grooves are arranged on one side or both sides of the vane. By adopting the above structure, the guide grooves are arranged on the side faces of the vanes, where the air flow passes, of the centrifugal fan, so that the wind can be more concentrated, the area and strength of air escaping from the vortex in the vane channel are both reduced, the vortex noise is decreased, the noise reduction effect is optimized and the overall characteristic effect of the fan is optimized.

Description

technical field [0001] The invention relates to the technical field of air supply equipment, in particular to a centrifugal fan with blade guide grooves for noise reduction. Background technique [0002] The aerodynamic noise of the fan is mainly composed of rotation noise and eddy current noise. The aerodynamic compression process generated by the high-speed rotation of the blades in the volute contains strong periodic arterial airflow and wake. This time-varying pressure pulsation causes the blade to generate rotational radiating noise. With the increase of the Reynolds number, the lateral movement of fluid microgroups will appear in the wake, transitioning from a laminar flow state to a turbulent flow state, generating vortices, causing the boundary layer to separate, and the vortices formed during separation are continuously taken away by the mainstream , the wake vortex area is formed behind the blade to generate vortex noise. [0003] Although people have a relativel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/30
CPCF04D29/30F04D25/08F04D29/28F04D29/4206F04D29/441
Inventor 资凯亮黎娟郭碧燕张辉艳章艳杨云萍
Owner FOSHAN HECAI TECH SERVICE
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