CN201874879U - Cross flow wind wheel and air equipment with same - Google Patents
Cross flow wind wheel and air equipment with same Download PDFInfo
- Publication number
- CN201874879U CN201874879U CN2010202711804U CN201020271180U CN201874879U CN 201874879 U CN201874879 U CN 201874879U CN 2010202711804 U CN2010202711804 U CN 2010202711804U CN 201020271180 U CN201020271180 U CN 201020271180U CN 201874879 U CN201874879 U CN 201874879U
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- impeller
- vanes
- tubular wine
- wine wheel
- wind wheel
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Abstract
The utility model discloses a cross flow wind wheel and air equipment with same. The cross flow wind wheel comprises a rotating shaft and an impeller. The impeller comprises two or more than two medium knots of the impeller, which are fixedly connected in sequence along the coaxial direction of the rotating shaft; each medium knot of the impeller comprises a plurality of vanes which are arranged into an annular shape according to set mounting intervals along the circumference directions; the end parts of the vanes are provided with end plates which fix the vanes; the impeller is at least provided with two neighboring medium knots of the impeller; and the vane numbers on the medium knots of the impeller are different. In the cross flow wind wheel, the medium knots of vanes of different numbers are crossly distributed; therefore, the vanes are effectively avoided passing through clearances between the front flange of a volute tongue and the vanes as well as between a wind wheel shell and the vanes in the same time interval; and the pressure variation generated in the clearances between the medium knots of the impeller with different vane numbers and the front flange of the volute tongue as well as between the medium knots of the impeller and the wind wheel shell can be staggered; meanwhile, the rotating frequency noises of the vanes are staggered; therefore, the rotating noises of the cross flow wind wheel can be reduced; ultraharmonics noises caused by overlapping noises of the same frequency can be avoided; and harsh whistlers can also be avoided.
Description
Technical field
The utility model relates to a kind of tubular wine wheel and corresponding air device, particularly a kind of tubular wine wheel that helps improving tonequality, reduces the air-supply noise is applicable to that air devices such as split-type air conditioner air conditioner indoor machine, mobile air conditioner, air cleaner, dehumidifier, low static pressure wind pipe machine, Balkh fan, window air conditioner use.
Background technique
The air conditioner that is assembled with tubular wine wheel is usually as shown in Figure 1: set on the front 2a of the housing 2 of indoor set 1 and suck grid 3 and discharge grid 4, make these suck grids 3 and discharge grid 4 by the ventilation channels 6 in the blower-casting 5 to be communicated with.Be provided as the tubular wine wheel 8 of indoor fan at the downwind side of indoor side heat exchanger 7, make from sucking grid 3 and suck indoor airs in the housings 2 and carry out heat exchange at indoor side heat exchanger 7 and become cold wind or warm braw, by tubular wine wheel 8 cold wind or warm braw are blown to indoor once more from discharging grid 4, constitute hot and cold air-conditioning.
Above-mentioned air conditioner is employed to be the tubular wine wheel 8 of traditional form, its structure is as shown in Figure 2: a plurality of linear leaf 8c that will be parallel to running shaft 10 circumferentially are arranged between the discoideus end plate 8a of pairing left and right, 8b by required uniformly-spaced crossbearer, at axial intermediate portion vertically by the required annular partition plate 8d that uniformly-spaced is set up in parallel, thereby form in the multistage impeller and save 29, the blade quantity of joint 29 is identical in each section impeller.
In addition, blower-casting 5 and snail tongue leading edge 9 common formation gas fans are divided into wind and suck part and wind discharge section among tubular wine wheel 8 and Fig. 1 at snail tongue leading edge 9, blower- casting 5 and 18 two ends, tubular wine wheel 8 formed gaps.Especially at the gap portion 18 at this two place since relatively the flow velocity direction of each linear leaf 8c of tubular wine wheel 8 take a turn for the worse, therefore big pressure oscillation takes place, become the main sound source of air-supply noise.
In number of blade impellers such as tradition employing in the gas fan of joint 29 tubular wine wheel 8, because the blade quantity of the linear leaf 8c of joint 29 equates in each conventional impellers, each linear leaf 8c is also identical by the frequency BPF (Blade Passing-by Frequency) in the gap 18 that constitutes with leading edge 9 and blower-casting 5, pressure oscillation when passing through gap 18, each linear leaf 8c takes place, the pressure oscillation amplitude that it produces in the space is identical with frequency, causes the pressure waveform distortion to strengthen.As shown in Figure 3, pulsation of the waveform of same frequency and distortion are superimposed as and have bigger higher harmonics.The result of higher harmonics stack has just produced ear-piercing howling like this, has a strong impact on the tonequality of air conditioner, and has significantly improved the air-supply noise.The noise that identical component and blade passing frequency cause takes place shown in Fig. 3 noise waveform N, multiply by frequency (Hz) the noise Pa that rotating speed (rps) expression, frequency are called as sound insulation between blade with the number of the linear leaf 8c of tubular wine wheel 8, and because of the pressure oscillation waveform is precipitous, so have the characteristic of easy generation as the higher harmonics (homophonic Pb) of first-harmonic.
What Fig. 3 represented is: when the diameter of tubular wine wheel 8 is 94mm, total length is 610mm, the number of linear leaf 8c is 35, linear leaf is parallel with running shaft 10, with the rotating speed be 1140rpm (rev/min) during running, blade passing frequency BPF is the analysis chart of the gas fan noise N of 35*1140/60=665Hz (one times fundamental frequency Pa=665Hz, twice fundamental frequency Pb=1330Hz).The noise stack that produces owing to identical blade passing frequency (BPF), cause at the noise peak at blade one times of fundamental frequency 665HZ of rotation and two times of fundamental frequency places bigger, thereby produce howling, also cause the overall noise value bigger than normal simultaneously.
The model utility content
The technical problems to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, provides to make rotation sound and higher harmonics thereof lower, make noise to lower the tubular wine wheel that sense of hearing is improved.
Another purpose of the present utility model provides a kind of air device with this tubular wine wheel, thereby improves the noise and the service behaviour of air device.
The technical solution of the utility model is: a kind of tubular wine wheel, save in the two or more impellers that comprise running shaft, axially are fixedly connected sequentially along running shaft, joint comprises the circumferential arranged spaced in some edges blade circlewise in each impeller, the end of blade is provided with the end plate of stator blade, it is characterized in that: have at least in the described tubular wine wheel in two adjacent impellers and save the lobe numbers difference on it.
The lobe numbers difference that saves in any adjacent two impellers of described tubular wine wheel.
Perhaps, described tubular wine wheel comprises in two groups or more the impeller and saving, and has that joint is one group in the impeller of identical lobe numbers, and joint is not staggered in the impeller on the same group.
Perhaps, described tubular wine wheel comprises in two groups or more the impeller and saving, and has that joint is one group in the impeller of identical lobe numbers, and joint is arranged in together in the impeller on the same group.
One of them end plate that saves in the described impeller is provided with the hub portion that engages with running shaft.
The utility model also provides a kind of air device with above-mentioned tubular wine wheel.
Tubular wine wheel provided by the utility model is fixed on a plurality of blades to form in the impeller between a pair of round shape or ring-type end plate and saves along circumferentially being configured to the ring-type crossbearer by required installation interval, and the number of blade that saves in each section impeller is incomplete same.Make simultaneously to save in the above-mentioned impeller and stack gradually the fixedly connected whole section impeller that be integrally formed into vertically, fixed charge method end plate forms rotary shaft on above-mentioned each blade tip of a side that saves in the impeller at these stacked two ends, on the end plate of the other end, form the hub portion that engages with running shaft, after running shaft engages, thereby form one whole tubular wine wheel.
Therefore, because tubular wine wheel provided by the utility model is made of joint in the impeller of two or more blade quantity at least, the middle joint of varying number blade is interspersed, thereby avoided effectively each blade in the identical time lag by and snail tongue leading edge and and the wind wheel housing between the gap, joint and snail tongue leading edge are reached and the wind wheel housing between the gap in the pressure oscillation that produces stagger, blade speed noise staggers simultaneously, thereby can reduce the Rotation Noise of tubular wine wheel, avoid the noise stack of same frequency and cause the higher harmonics noise, avoid producing ear-piercing howling.The crest frequency of lowered rotation sound is disperseed, thereby ear-piercing sense reduction, sense of hearing are improved.
Description of drawings
Below with reference to embodiment of the present utility model and accompanying drawing, above-mentioned and other aspects of the present utility model are described, it is more clear that these contents can become.
Fig. 1 is the sectional arrangement drawing of indoor set one example of conventional air conditioner;
Fig. 2 is the stereogram of traditional tubular wine wheel shown in Fig. 1;
Fig. 3 is traditional tubular wine wheel noise spectrum distribution map; Wherein transverse axis is represented frequency noise, and the longitudinal axis is represented level of noise;
Fig. 4 is the utility model tubular wine wheel embodiment's a stereogram;
Fig. 5 is an exploded perspective view embodiment illustrated in fig. 4;
Fig. 6 is the utility model embodiment tubular wine wheel noise spectrum distribution map; Wherein transverse axis is represented frequency noise, and the longitudinal axis is represented level of noise.
In Fig. 1～6, same or suitable part is used same label.
Embodiment
Below, couple the utility model embodiment describes according to Fig. 4～6.Fig. 4 is the stereogram of the utility model tubular wine wheel embodiment main assembly, and Fig. 5 is the exploded perspective view of Fig. 4, and tubular wine wheel 21 is assembled in the air conditioner indoor machine shown in Figure 11 as indoor fan.Tubular wine wheel 21 as shown in Figure 4 comprises in two groups of impellers with different numbers of blade and saves 29a, 29b.The blade quantity that saves 29a, 29b in the impeller is inequality, save 29a, 29 in the impeller of different blade quantities and be configured to concentric annular successively alternately, vertically crossbearer is fixed between pairing left and right end plate 8a, 8b, set demarcation strip 8d by required axially spaced-apart in the middle of the tubular wine wheel 21, blade is fixedlyed connected with demarcation strip 8d, and formed impeller forms the through-flow air-supply rotatably around running shaft 10.
As shown in Figure 5, tubular wine wheel 21 forms multistage respectively that joint 29a is fixedly connected sequentially into concentric shape vertically with 29b in the different impeller of the blade quantity of one, in Fig. 5 on the outside as the end plate 8b that saves 29a (or 29b) in the impeller or discoideus or ring-type demarcation strip 8d of right-hand member, be concentric shape and form to make with the running shaft 10 of this illustrated motor etc. with retaining screw etc. and can freely dismantle the hub portion (axle sleeve) 27 that combines.
Next, with reference to Fig. 3 and Fig. 6 the noise of present embodiment being lowered effect describes.Represent as Fig. 3, the size of tubular wine wheel 8, for example diameter is 94mm, total length is 610mm, the number of linear leaf 8c is 35, and linear leaf is parallel with running shaft 10, with the rotating speed be 1140rpm (rev/min) when running, blade passing frequency BPF is the analysis chart of the gas fan noise N of 35*1140/60=665Hz (one times fundamental frequency Pa=665Hz, twice fundamental frequency Pb=1330Hz).The noise stack that produces owing to identical blade passing frequency (BPF), cause at the noise peak at blade one times of fundamental frequency 665HZ of rotation and two times of fundamental frequency places bigger, thereby produce howling, also cause the overall noise value bigger than normal simultaneously.
In the utility model, as shown in Figure 6, when the middle joint of forming tubular wine wheel respectively by 43,30, when constituting Deng two kinds of different numbers of blade, when this tubular wine wheel with 1200rpm (rev/min) when rotation, the middle joint of the different numbers of blade is by snail tongue leading edge and with the wind wheel body clearance and the rotation fundamental frequency BPF of product is respectively: BPF1=43*1200/60=860Hz; BPF2=30*1200/60=600Hz.Like this, save the blade rotation fundamental frequency that produces in two kinds of different numbers of blade and differ 260Hz, can effectively avoid the noise stack of identical frequency and produce resonance and the bat noise that shakes, thereby ear-piercing howling and buzz that conventional tubular wine wheel is easy to generate have been eliminated, improve tonequality and sense of hearing, and reduced noise.Noise can reduce about 2 decibels, and can ensure air quantity effectively.
Because with the tubular wine wheel 21 of present embodiment middle joint 29a by different blade quantities, 29b forms, the pressure that produces in the gap delta of snail tongue leading edge 9 shown in tubular wine wheel 21 and Fig. 3 and blower-casting 5 is changed continuously, and blade passing frequency BPF (Blade Passing-by Frequency) is inequality, and rotation sound peak value Pa and its overtone peak value Pb are reduced.The utility model embodiment's noise spectrum as shown in Figure 6.The crest frequency composition of rotation sound N is disperseed, improve sense of hearing thereby can reduce ear-piercing sense.
Though present embodiment has only provided the tubular wine wheel example of joint combination in the wind wheel of two kinds of different blade quantities, the utility model comprises joint combination in the wind wheel of two kinds and two or more blade quantities.Simultaneously, the combination that saves in the different blade quantity wind wheels can be the end that joint (as 29a) is positioned at tubular wine wheel 21 in a kind of wind wheel of blade quantity, joint (as 29b) is positioned at the other end of tubular wine wheel in the wind wheel of another kind of blade quantity, or save 29a in the wind wheel of different blade quantities, 29b is interspersed.Or the combination that saves in the wind wheel of blade quantity more than three kinds or three kinds, with the noise of effective reduction tubular wine wheel, improve tonequality and sense of hearing.
For example, when the middle joint of forming tubular wine wheel respectively by 43,30, when three kinds of different numbers of blade such as 35 grades constitute, when this tubular wine wheel with 1200rpm (rev/min) when rotation, the middle joint of the different numbers of blade is by snail tongue leading edge and with the wind wheel body clearance and the rotation fundamental frequency BPF of product is respectively: BPF1=43*1200/60=860Hz; BPF2=30*1200/60=600Hz; BPF3=35*1200/60=700Hz.Like this, the blade rotation fundamental frequency that joint produces in three kinds of different numbers of blade differs 260Hz, 100Hz, 160Hz, can effectively avoid the noise stack of same frequency and produces resonance and the bat noise that shakes, and improves tonequality and sense of hearing, and reduces noise.
Claims (6)
1. tubular wine wheel, comprise running shaft and impeller, described impeller comprises in the two or more impellers that axially are fixedly connected sequentially along running shaft and saving, joint comprises the circumferential arranged spaced in some edges blade circlewise in each impeller, the end of blade is provided with the end plate of stator blade, it is characterized in that: have at least in the described impeller in two adjacent impellers and save the lobe numbers difference on it.
2. tubular wine wheel according to claim 1 is characterized in that: the lobe numbers difference that saves in any adjacent two impellers of described impeller.
3. tubular wine wheel according to claim 1 is characterized in that: described impeller comprises in two groups or more the impeller and saving, and has that joint is one group in the impeller of identical lobe numbers, and joint is not staggered in the impeller on the same group.
4. tubular wine wheel according to claim 1 is characterized in that: described impeller comprises in two groups or more the impeller and saving, and has that joint is one group in the impeller of identical lobe numbers, and joint is arranged in together in the impeller on the same group.
5. according to each described tubular wine wheel of claim 1 to 4, it is characterized in that: one of them end plate that saves in the described impeller is provided with the hub portion that engages with running shaft.
6. air device with tubular wine wheel, it is characterized in that: described tubular wine wheel is aforesaid right requirement 1～5 each described tubular wine wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202711804U CN201874879U (en) | 2010-07-23 | 2010-07-23 | Cross flow wind wheel and air equipment with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202711804U CN201874879U (en) | 2010-07-23 | 2010-07-23 | Cross flow wind wheel and air equipment with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201874879U true CN201874879U (en) | 2011-06-22 |
Family
ID=44162797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202711804U Expired - Lifetime CN201874879U (en) | 2010-07-23 | 2010-07-23 | Cross flow wind wheel and air equipment with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201874879U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644622A (en) * | 2012-04-17 | 2012-08-22 | 广东美的制冷设备有限公司 | Cross flow wind wheel and air treatment device with same |
-
2010
- 2010-07-23 CN CN2010202711804U patent/CN201874879U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644622A (en) * | 2012-04-17 | 2012-08-22 | 广东美的制冷设备有限公司 | Cross flow wind wheel and air treatment device with same |
| CN102644622B (en) * | 2012-04-17 | 2015-08-19 | 广东美的制冷设备有限公司 | Tubular wine wheel and there is the air processor of tubular wine wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |