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Fast denoising blower fan

A noise reduction and fast technology, applied in the direction of mechanical equipment, machines/engines, liquid fuel engines, etc., can solve the problems of environmental noise pollution, strong noise, etc., and achieve the effect of reducing rotating noise, improving elimination efficiency, and reducing pulse force

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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Embodiment 1

[0023] Such as Figure 1 to Figure 3 As shown, this embodiment includes a volute 1 and an 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 the tongue tip of the volute 5 is inclined to the side close to the impeller 4, and a muffler 8 is fixed on the inner wall of the volute 1 through an adhesive layer 6, and A plurality of sound-absorbing blind holes 7 with a longitudinal section of three-quarter circle arranged side by side are opened on the upper surface of the sound-absorbing member 8 . When the fan is working, the impeller 4 rotates to increase the speed of the air pouring into the air inlet 2, so that it is quickly discharged from the air outlet 3. During the operation of the impeller 4, especially at the outlet of the blade passage on the rotating impeller 4, along the The axial airflow pres...

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Abstract

The invention discloses a fast denoising blower fan comprising a spiral case and an impeller, and a second impeller; the impeller and second impeller are staggered; a worm tongue is arranged between the spiral case and the air outlet; the worm tongue tip leans to the impeller; the air outlet end is screwed with a denoising barrel; 1 / 2 inner wall, close to the worm tongue, of the denosing 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 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 fast noise reduction fan. Background technique [0002] The centrifugal fan is mainly composed of: impeller, casing, coupling and shaft. The 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 is installed and Fixed impeller, through coupling and motor. [0003] When the 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 impeller, guided by the volute-shaped casing, so that it flows to the outlet of the fan, so that it flows in the center of the impeller. Negative pressure is formed, ...

Claims

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Application Information

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