Dual-blade denoising blower fan

A dual-blade, noise reduction technology, applied in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as environmental noise pollution, strong noise, etc., and achieve the effect of reducing rotational noise, improving efficiency, and smoothing speed distribution

Inactive Publication Date: 2016-10-19
CHONGQING DONGHONGXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the ventilation will also be accompanied by strong noise, which brings serious noise pollution to the environment.

Method used

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  • Dual-blade denoising blower fan
  • Dual-blade denoising blower fan
  • Dual-blade denoising blower fan

Examples

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Embodiment 1

[0024] Such as Figure 1 to Figure 3 As shown, this embodiment includes a volute 1 and a first impeller 4 fixed in the volute 1, and the two sides of the volute 1 are respectively provided with a horizontal air inlet 2 and a vertical air outlet 3. A volute tongue 5 is arranged between the volute 1 and the air outlet 3, and a muffler tube 6 is threadedly connected to the end of the air outlet 3, and on the half inner wall of the muffler tube 6 on the side close to the volute tongue 5 A first sound-absorbing member 7 is installed, and a second sound-absorbing member 8 is fixed on the remaining half of the inner wall of the sound-absorbing cylinder 6. The longitudinal sections of the first sound-absorbing member 7 and the second sound-absorbing member 8 are arc-shaped, and The distance between the highest point of the first silencing element 7 and the inner wall of the silencing cylinder 6 is A, and the distance between the highest point of the second silencing element 8 and the ...

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PUM

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Abstract

The invention discloses a dual-blade denoising blower fan comprising a spiral case and a first impeller; a worm tongue is arranged between the spiral case and the air outlet; the air outlet end is connected with a denoising barrel; the 1/2 inner wall, close to the worm tongue, of the denoising barrel is provided with a first denoising member; the rest 1/2 inner wall of the denoising barrel is fixedly provided with a second denoising member; the distance between the highest point of the first denoising member and the denoising barrel inner wall is A; the distance between the highest point of the second denoising member and the denoising barrel inner wall is B, and A>B. The blower fan also comprises a stop flow ring; the first impeller is provided with a leakage flow gap right opposite to the bottom of the stop flow ring. The first denoising member can denoise high db rotation noises formed by fast airflow and the worm tongue; the second denoising member can denoise low db rotation noises; airflow layers of different speeds in the spiral case can be differentially treated, thus ensuring airflow in the air outlet to quietly and stably output.

Description

technical field [0001] The invention relates to ventilation equipment, in particular to a double-blade noise reduction fan. Background technique [0002] The centrifugal fan is mainly composed of: the first impeller, the casing, the coupling, and the shaft. The first impeller is the main working part that generates wind pressure and transmits energy; the casing is mainly used to introduce gas and discharge gas, and at the same time convert part of the kinetic energy of the gas into pressure energy; the coupling is used to connect the motor and fan to transmit torque; the shaft Install and fix the first impeller, through the coupling and the motor. [0003] When the first impeller rotates, the gas between the blades of the centrifugal fan is subjected to centrifugal force to obtain kinetic energy (dynamic pressure head) and is discharged from the periphery of the first impeller, guided by the volute-shaped casing, so that it flows toward the outlet of the fan, thereby Negat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66F04D29/28F04D29/42F04D29/44
Inventor 彭君秀
Owner CHONGQING DONGHONGXIN TECH
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