CN106032810A - Fast denoising blower fan - Google Patents
Fast denoising blower fan Download PDFInfo
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- CN106032810A CN106032810A CN201510124384.2A CN201510124384A CN106032810A CN 106032810 A CN106032810 A CN 106032810A CN 201510124384 A CN201510124384 A CN 201510124384A CN 106032810 A CN106032810 A CN 106032810A
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- impeller
- tongue
- denoising
- spiral case
- blower fan
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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
The present invention relates to ventilation installation, specifically refer to a kind of fast noise reduction blower fan.
Background technology
Centrifugal fan is mainly by impeller, casing, shaft coupling, axle.Impeller is to produce blast and the main acting parts of transmission energy；Casing is mainly used to introduce gas and discharge gas, the part kinetic energy of gas is become pressure energy simultaneously；Shaft coupling is used for connecting motor and blower fan, transmits moment；Axle installs and fixes impeller, by shaft coupling and motor.
Gas between centrifugal fan blade is when impeller rotates, obtained kinetic energy (dynamic head) by centrifugal action to discharge from impeller periphery, guiding through scroll casing shape casing, it is allowed to ventilation blower output flow, thus negative pressure is formed at impeller central position, outer gas stream is made to flow into continually supplementary, so that blower fan can discharge gas.Motor passes to draught fan impeller by axle power, impeller rotates and energy is passed to air, under the effect rotated, air produces centrifugal force, air prolongs the blade of draught fan impeller and spreads to around, now, draught fan impeller is the biggest, and the energy that air is accepted is the biggest, and namely the pressure head (blast) of blower fan is the biggest.If cutting little by big impeller, not interfering with air quantity, only can reduce blast.
But while being aerated, also can bring serious sound pollution along with producing strong noise to environment.The noise that blower fan produces in the running mainly includes the Gas-solid Coupling noise that aerodynamic noise, mechanical noise and gas and Elastic Solid System interaction produce.Wherein, aerodynamic noise accounts for 45%, and mechanical noise accounts for 30%, and Gas-solid Coupling noise accounts for 25%.Aerodynamic noise mainly includes rotational noise and vortical noise, air power noise in ventilation blower is exactly the result that both are overlapped mutually, when blower fan rotates, blade path exit on rotary blade, stream pressure vertically all varies widely with air velocity, when the gap of snail tongue Yu blade exit edge part is less, when the blade path of rotation skims at snail tongue, arising that periodic pressure and velocity fluctuation, the produced noise of pulsation is referred to as rotational noise.Rotational noise not only pollutes environment, and also can affect the stability that impeller works, and the most how to solve rotational noise particularly important.
Summary of the invention
It is an object of the invention to provide a kind of fast noise reduction blower fan, the Rotation Noise produced when reducing blower fan operating, and then reach protect environment and improve the purpose of blower fan job stability.
The purpose of the present invention is achieved through the following technical solutions:
A kind of fast noise reduction blower fan, including spiral case and the impeller that is fixed in spiral case, the both sides of described spiral case offer the air inlet of horizontal direction and the air outlet of vertical direction respectively, snail tongue it is provided with between described spiral case and air outlet, the tip of the tongue of described snail tongue is to the lopsidedness near impeller,, spiral case inwall is fixed with acoustic element by adhesive-layer, and on the upper surface of described acoustic element, has the sound-absorbing blind hole that multiple longitudinal section being arranged side by side is 3/4ths circles.During blower fan work, the air speed-raising that air inlet is poured into by wheel rotation, it is made quickly to be discharged by air outlet, in the operation process of impeller, the particularly blade path exit on rotary blade, stream pressure vertically all varies widely with air velocity, when the gap of snail tongue Yu blade exit edge part is less, when the blade path rotated skims at snail tongue, arise that periodic pressure and velocity fluctuation, pulsation can produce rotational noise, and rotational noise can be discharged from air outlet with air-flow runner along spiral case, environment around severe contamination blower fan；
When the present invention works, the air that outside is poured into by impeller quickly moves the air outlet to blower fan, the rotational noise that gas shock snail tongue produces simultaneously is discharged by air outlet the most therewith, the inwall of spiral case is attached to acoustic element by adhesive-layer, described acoustic element uses special sound-absorbing material to make, the Rotation Noise produced can be carried out adsorption treatment, and on the upper surface of acoustic element, offer multiple noise reduction blind hole being arranged side by side, the longitudinal section of described noise reduction blind hole is 3/4ths circles, Rotation Noise is during transmission, constantly can turn round in spiral case with air-flow, also have substantial amounts of noise to stop in noise reduction blind hole simultaneously, by the continuous absorption to noise of 3/4ths spherical blind holes, and for the acoustic element upper surface of plane, air-flow residence time in noise reduction blind hole is longer, its erasure effect reached is the most more preferably；The tip of the tongue of snail tongue is tilted by the present invention towards near the direction of impeller simultaneously, and then the air pulse phase place being imparted on the snail tongue the tip of the tongue mutually staggers, and reaches the impulsive force reducing on snail tongue, the purpose reducing Rotation Noise.
Further, described acoustic element is sponge, tapetum fibrosum or aluminium silicate wool.As preferably, the first acoustic element and the second acoustic element all use the material that erasure effect is good, i.e. sponge, tapetum fibrosum or aluminium silicate wool, by processing the absorption of Rotation Noise at air outlet, and then reach the quiet output smoothly of the air-flow at fan outlet.
Further, the angle of inclination of the described snail tongue the tip of the tongue is 15 ° ~ 35 °.In the range of the angle of inclination of the snail tongue the tip of the tongue is arranged on 15 ° ~ 35 °, make to be applied on snail tongue by air-flow out in impeller simultaneously, i.e. achieve the impulsive force reduction that the two strands of air-flows being applied on the snail tongue the tip of the tongue produce, improve the elimination efficiency of Rotation Noise further.
Further, described snail tongue is short tongue, and the distance that snail tongue is away from impeller peak is s, and the excircle of the impeller distance away from spiral case top inwall is S, and meets 0 ＜ s ＜ S.Snail tongue refers to that the junction of centrifugal ventilator volute and gas outlet often has one to be formed by shell wall, " ligule " structure of shape such as tongue, its effect is used to placement part gas at spiral case internal circulation flow, time near the gas flow sweep snail tongue in impeller passage exit, the tip of the tongue of snail tongue breaks it into two: major part air-flow has flowed to the outlet of blower fan along passage；Small part air-flow then flows back to spiral case by the gap between snail tongue, impeller, rotates with impeller and return to, after reaching one week, the shunting that at snail tongue, participation is new in spiral case.Wherein, snail tongue includes flat tongue, short tongue, deep tongue and point tongue, the i.e. corner dimension by being formed between shell wall and the shell wall of air outlet of spiral case body judges, and angle is in the range of 0 ~ 180 °, snail tongue is set to short tongue by the present invention, because its efficiency curve is relatively flat, economic work region is wider, is therefore applicable to the blower fan carrier of stability output；And the distance that snail tongue is away from impeller peak is s, the excircle of the impeller distance away from spiral case top inwall is S, meet 0 ＜ s ＜ S simultaneously, between snail tongue and impeller, i.e. form a ventilation gap, ventilation gap width is s, in region, impeller passage exit, air-flow can produce stronger pressure fluctuation in ventilation gap, form also impeller blade and pass through effective acoustic radiation of frequency and its harmonic wave, when this ventilation gap increases, the axial VELOCITY DISTRIBUTION of air-flow is the most smooth, therefore the amplitude of the pressure fluctuation at snail tongue also can reduce, i.e. reduce Rotation Noise；This ventilation gap can not be excessive simultaneously, and after ventilation gap increases to a certain degree, noise no longer declines, and excessive ventilation gap can make the aeroperformance of blower fan reduce on the contrary, therefore the scope of s is determined in the range of 0 ~ S.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the present invention offers multiple noise reduction blind hole being arranged side by side on the upper surface of acoustic element, the longitudinal section of described noise reduction blind hole is 3/4ths circles, Rotation Noise is during transmission, constantly can turn round in spiral case with air-flow, also have substantial amounts of noise to stop in noise reduction blind hole, by the continuous absorption to noise of 3/4ths spherical blind holes, and for the acoustic element upper surface of plane simultaneously, air-flow residence time in noise reduction blind hole is longer, and its erasure effect reached is the most more preferably；The tip of the tongue of snail tongue is tilted by the present invention towards near the direction of impeller simultaneously, and then the air pulse phase place being imparted on the snail tongue the tip of the tongue mutually staggers, and reaches the impulsive force reducing on snail tongue, the purpose reducing Rotation Noise；
2, in the range of the angle of inclination of the snail tongue the tip of the tongue is arranged on 15 ° ~ 35 ° by the present invention, make to be applied on snail tongue by air-flow out in impeller simultaneously, i.e. achieve the impulsive force reduction that the two strands of air-flows being applied on the snail tongue the tip of the tongue produce, improve the elimination efficiency of Rotation Noise further；
3, the present invention is in region, impeller passage exit, air-flow can produce stronger pressure fluctuation in ventilation gap, impeller blade is by frequency and effective acoustic radiation of its harmonic wave, when this ventilation gap increases, the axial VELOCITY DISTRIBUTION of air-flow is the most smooth, therefore the amplitude of the pressure fluctuation at snail tongue also can reduce, and i.e. reduces Rotation Noise；.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of one specific embodiment of fast noise reduction blower fan of the present invention；
Fig. 2 is the sectional view of a kind of one specific embodiment of fast noise reduction blower fan of the present invention；
Fig. 3 is the structural representation of one specific embodiment of acoustic element in a kind of fast noise reduction blower fan of the present invention.
Labelling and corresponding parts title in accompanying drawing: 1, spiral case, 2, air inlet, 3, air outlet, 4, impeller, 5, snail tongue, 6, adhesive-layer, 7, sound-absorbing blind hole, 8, acoustic element.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figure 1 to Figure 3, the present embodiment includes spiral case 1 and the impeller 4 being fixed in spiral case 1, the both sides of described spiral case 1 offer the air inlet 2 of horizontal direction and the air outlet 3 of vertical direction respectively, it is provided with snail tongue 5 between described spiral case 1 and air outlet 3, the tip of the tongue of described snail tongue 5 is to the lopsidedness near impeller 4, spiral case 1 inwall is fixed with acoustic element 8 by adhesive-layer 6, and on the upper surface of described acoustic element 8, has the sound-absorbing blind hole 7 that multiple longitudinal section being arranged side by side is 3/4ths circles.During blower fan work, impeller 4 rotates the air speed-raising will poured at air inlet 2, it is made quickly to be discharged by air outlet 3, in the operation process of impeller 4, the particularly blade path exit on rotary blade 4, stream pressure vertically all varies widely with air velocity, when snail tongue 5 is less with the gap of blade exit edge part, when the blade path rotated skims at snail tongue 5, arise that periodic pressure and velocity fluctuation, pulsation can produce rotational noise, and rotational noise can be discharged from air outlet 3 with air-flow runner along spiral case 1, environment around severe contamination blower fan；
nullWhen the present invention works，The air that outside is poured into by impeller 4 quickly moves the air outlet 3 to blower fan，The rotational noise that gas shock snail tongue 5 produces simultaneously is discharged by air outlet 3 the most therewith，The inwall of spiral case 1 is attached to acoustic element 8 by adhesive-layer 6，Described acoustic element 8 uses special sound-absorbing material to make，The Rotation Noise produced can be carried out adsorption treatment，And on the upper surface of acoustic element 8, offer multiple noise reduction blind hole 7 being arranged side by side，The longitudinal section of described noise reduction blind hole 7 is 3/4ths circles，Rotation Noise is during transmission，Constantly can turn round in spiral case 1 with air-flow，Also have substantial amounts of noise to stop in noise reduction blind hole 7 simultaneously，By the continuous absorption to noise of 3/4ths spherical blind holes，And for acoustic element 8 upper surface of plane，Air-flow residence time in noise reduction blind hole 7 is longer，Its erasure effect reached is the most more preferably；The tip of the tongue of snail tongue 5 is tilted by the present invention towards near the direction of impeller 4 simultaneously, and then the air pulse phase place being imparted on snail tongue 5 the tip of the tongue mutually staggers, reach the impulsive force reducing on snail tongue 5, the purpose reducing Rotation Noise, to avoid being polluted environment by the Rotation Noise entrained by air outlet 3 air-flow, improve the efficiency that noise reduction processes, it is ensured that the quiet output smoothly of the air-flow at air outlet 3 simultaneously.
As preferably, acoustic element 8 uses the material that erasure effect is good, i.e. sponge, tapetum fibrosum or aluminium silicate wool, by processing the absorption of Rotation Noise at air outlet 3, and then reaches the quiet output smoothly of the air-flow at fan outlet 3.
As preferably, the angle of inclination of described snail tongue 5 the tip of the tongue is 15 ° ~ 35 °.In the range of the angle of inclination of snail tongue 5 the tip of the tongue is arranged on 15 ° ~ 35 °, make to be applied on snail tongue 5 by air-flow out in impeller 4 simultaneously, i.e. achieve the impulsive force reduction that the two strands of air-flows being applied on snail tongue 5 the tip of the tongue produce, improve the elimination efficiency of Rotation Noise further.
Snail tongue 5 is set to short tongue by the present invention, and because its efficiency curve is relatively flat, economic work region is wider, is therefore applicable to the blower fan carrier of stability output；And the distance that snail tongue 5 is away from impeller 4 peak is s, the excircle of impeller 4 distance away from spiral case 1 top inwall is S, meet 0 ＜ s ＜ S simultaneously, between snail tongue 5 and impeller 4, i.e. form a ventilation gap, ventilation gap width is s, in impeller 4 channel exit region, air-flow can produce stronger pressure fluctuation in ventilation gap, form also impeller 4 blade passing frequency and effective acoustic radiation of its harmonic wave, when this ventilation gap increases, the axial VELOCITY DISTRIBUTION of air-flow is the most smooth, therefore the amplitude of the pressure fluctuation at snail tongue 5 also can reduce, i.e. reduce Rotation Noise；This ventilation gap can not be excessive simultaneously, and after ventilation gap increases to a certain degree, noise no longer declines, and excessive ventilation gap can make the aeroperformance of blower fan reduce on the contrary, therefore the scope of s is determined in the range of 0 ~ S.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (4)
1. a fast noise reduction blower fan, including spiral case (1) and the impeller (4) that is fixed in spiral case (1), the both sides of described spiral case (1) offer the air inlet (2) of horizontal direction and the air outlet (3) of vertical direction respectively, it is characterized in that: between described spiral case (1) and air outlet (3), be provided with snail tongue (5), the tip of the tongue of described snail tongue (5) is to the lopsidedness near impeller (4), spiral case (1) inwall is fixed with acoustic element (8) by adhesive-layer (6), and on the upper surface of described acoustic element (8), have the sound-absorbing blind hole (7) that multiple longitudinal section being arranged side by side is 3/4ths circles.
A kind of fast noise reduction blower fan the most according to claim 1, it is characterised in that: described acoustic element (8) is sponge, tapetum fibrosum or aluminium silicate wool.
A kind of fast noise reduction blower fan the most according to claim 1, it is characterised in that: the angle of inclination of described snail tongue (5) the tip of the tongue is 15 ° ~ 35 °.
4. according to a kind of fast noise reduction blower fan described in any one in claim 1 ~ 3, it is characterized in that: described snail tongue (5) is short tongue, and the distance that snail tongue (5) is away from impeller (4) peak is s, the excircle of impeller (4) distance away from spiral case (1) top inwall is S, and meets 0 ＜ s ＜ S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510124384.2A CN106032810A (en) | 2015-03-21 | 2015-03-21 | Fast denoising blower fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510124384.2A CN106032810A (en) | 2015-03-21 | 2015-03-21 | Fast denoising blower fan |
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| CN106032810A true CN106032810A (en) | 2016-10-19 |
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| CN201510124384.2A Pending CN106032810A (en) | 2015-03-21 | 2015-03-21 | Fast denoising blower fan |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678081A (en) * | 2017-01-17 | 2017-05-17 | 浙江工业大学 | Torque flow pump capable of reducing pressure pulsation |
| CN107859656A (en) * | 2017-11-10 | 2018-03-30 | 利欧集团浙江泵业有限公司 | The pump assembly of peripheral pump |
| CN108194386A (en) * | 2018-02-07 | 2018-06-22 | 广东纽恩泰新能源科技发展有限公司 | A kind of cross flow blower |
| JP2019002392A (en) * | 2017-06-20 | 2019-01-10 | 株式会社日本クライメイトシステムズ | Blower of vehicle air conditioner |
-
2015
- 2015-03-21 CN CN201510124384.2A patent/CN106032810A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678081A (en) * | 2017-01-17 | 2017-05-17 | 浙江工业大学 | Torque flow pump capable of reducing pressure pulsation |
| JP2019002392A (en) * | 2017-06-20 | 2019-01-10 | 株式会社日本クライメイトシステムズ | Blower of vehicle air conditioner |
| CN107859656A (en) * | 2017-11-10 | 2018-03-30 | 利欧集团浙江泵业有限公司 | The pump assembly of peripheral pump |
| CN107859656B (en) * | 2017-11-10 | 2024-04-19 | 利欧集团浙江泵业有限公司 | Pump body assembly of vortex pump |
| CN108194386A (en) * | 2018-02-07 | 2018-06-22 | 广东纽恩泰新能源科技发展有限公司 | A kind of cross flow blower |
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Application publication date: 20161019 |
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| WD01 | Invention patent application deemed withdrawn after publication |