CN205349871U - Formula of making an uproar draught fan falls - Google Patents
Formula of making an uproar draught fan falls Download PDFInfo
- Publication number
- CN205349871U CN205349871U CN201521130687.7U CN201521130687U CN205349871U CN 205349871 U CN205349871 U CN 205349871U CN 201521130687 U CN201521130687 U CN 201521130687U CN 205349871 U CN205349871 U CN 205349871U
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- cover body
- connecting rod
- air
- noise
- introduced machine
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Abstract
The utility model discloses a formula of making an uproar draught fan falls, including the frame, to rotate in the frame and be connected with the pivot, pivot one end is fixed with the impeller, and the impeller outside is equipped with the cover body, is equipped with air intake and air outlet on the cover body, and cover body both sides still are equipped with the stiffener that is used for reducing the vibrations of the cover body, the inside axial connecting rod that still is equipped with connecting the fans cover both ends face of fan casing, the connecting rod equals with the distance of connecting rod to the internal wall of cover to the radial distance of flabellum side. This formula of making an uproar draught fan falls can reduce the vibrations of the induced air aircraft bonnet body effectively, reduces the noise at work of draught fan.
Description
Technical field
This utility model relates to air-introduced machine, more specifically, it relates to a kind of noise-reduction type air-introduced machine.
Background technology
Air-introduced machine is dependent on the mechanical energy of input, improves gas pressure and supplies gas side by side the machinery of body.Bigger noise pollution can be produced during air-introduced machine work, rotation that the noise of air-introduced machine is mainly derived from air-introduced machine fan and the vibrations that produce, namely the air of high speed rotating collides institute mutually with the hardware in air-introduced machine, the vibration of generation, especially the vibrations of air-introduced machine cover body.
At present, the Chinese patent that application number is 201520233613.X discloses a kind of Large Size Induced Draft Fans denoising device, including air induction mast, gas outlet, denoising pipe, the air intake vent of described denoising pipe is connected with the gas outlet of Vanes on Induced Draft Fan shell, its air outlet is connected with gas outlet, denoising pipe is the spiral wound structure with gas outlet for central authorities, being provided with material in described denoising pipe is stainless noise suppression network, duct wall is provided with the acoustical cotton that material is polyester fiber, denoising pipe total length is no less than 100 meters, diameter of section is no less than 0.6 meter, the number of turns is enclosed no less than 3.Although this Large Size Induced Draft Fans denoising device is capable of noise reduction, but owing to structure is complicated, volume is relatively big, is unfavorable for actually used, the noise simultaneously produced also without the vibrations solving electric fan shell.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is in that to provide a kind of noise-reduction type air-introduced machine, can efficiently reduce the vibrations of air-introduced machine cover body, reduce the operating noise of air-introduced machine.
For achieving the above object, this utility model provides following technical scheme: a kind of noise-reduction type air-introduced machine, including frame, being rotatably connected to rotating shaft in frame, rotating shaft one end is fixed with impeller, is provided with cover body outside impeller, cover body is provided with air inlet and air outlet, cover body both sides are additionally provided with the bracing piece for reducing cover body vibrations, are additionally provided with the axial connecting rod connecting fan guard both ends of the surface inside fan guard, and connecting rod is equal to the vertical dimension of cover body inwall with connecting rod to the radial distance of flabellum side.
Cover body end face can be fixed by bracing piece arrange better, reduce the vibration amplitude of cover body end face, when there are vibrations in cover body end face, vibrations can be directed in frame by arranging of bracing piece, to reduce amplitude, cover body both ends of the surface can be linked together by arranging of connecting rod, strengthen the bulk strength of cover body, simultaneously when impeller blade turns over a region, place, the air pressure in this region can produce periodic change, cover body both ends of the surface are produced pressure, cause vibrating, arranging of connecting rod can make the power of cover body both ends of the surface cancel out each other, reduce the chance producing vibration.Connecting rod is maximum to the radial distance of the flabellum side wind-force that is because this place equal to the distance of connecting rod to cover body inwall, and when flabellum rotates, the air pressure change amount at this place is also maximum, and connecting rod is arranged on this place can farthest reduce vibration.
This utility model is further arranged to: described connecting rod cross section is ellipse, and the direction of connecting rod elliptic cross-section major axis is parallel with the wind direction blown in connecting rod.
The air inducing face area that can reduce connecting rod is so set, reduces the stress of connecting rod during fan work, decrease the vibrations caused by connecting rod simultaneously, so arrange simultaneously and can also reduce the windage that air-introduced machine is overall, reduce energy consumption.
This utility model is further arranged to: described air inlet is located at cover body end face, and air inlet is provided with blower cover, and blower cover cross section is circular arc, and circular arc opening is towards faceshield side wall.
Blower cover arc opening is towards faceshield side wall rather than cover body axis, the area of air inlet can be increased on the one hand, it is beneficial to air intake, blower cover is evagination, during air intake, air intake resistance is less, it is internally formed, at cover body, the air channel inside contracted simultaneously, can quickly be transferred out air-introduced machine in air channel by portion in impeller inhalation mask body compressed air, be conducive to improving the efficiency of air-introduced machine.
This utility model is further arranged to: described impeller is near the end face cross section circular arc of air inlet, and circular arc opening is towards faceshield side wall.
Impeller near the end face of air inlet towards faceshield side wall rather than towards cover body axis, it is possible to form a circular arc strengthened with the side of blower cover, increase the volume in air channel further and resistance that wind flows in air channel.
This utility model is further arranged to: described fan guard side is additionally provided with observation window, and observation window is connected with cover body by pulling button.
Observation window the working condition that can observe the parts within fan guard easily is set, observation window by pull button and cover body connect, folding with convenience.
In sum, this utility model has the advantages that the vibrations that can efficiently reduce cover body, reduces noise, increases the air supplying distance of air-introduced machine simultaneously.
Accompanying drawing explanation
Fig. 1 is the outline drawing of this utility model embodiment；
Fig. 2 is the axial, cross-sectional view at this utility model embodiment cover body place；
Fig. 3 is the sectional view of this utility model embodiment cover body and end face parallel direction.
Accompanying drawing labelling: 1, frame；2, cover body；3, impeller；4, air inlet；5, connecting rod；6, air outlet；7, blower cover；8, bracing piece；9, observation window；10, rotating shaft.
Detailed description of the invention
With reference to accompanying drawing, embodiment is described further.
A kind of noise-reduction type air-introduced machine, including frame 1, frame 1 is rotatably connected to rotating shaft 10, rotating shaft 10 one end is fixed with impeller 3, the other end is connected with dynamical element, impeller 3 is externally provided with cover body 2, it is internal that impeller 3 is in cover body 2, cover body 2 is provided with air inlet 4 and air outlet 6, cover body 2 both sides are additionally provided with for increasing cover body rigidity and reducing the bracing piece 8 of cover body 2 vibrations, being additionally provided with the axial connecting rod 5 connecting fan guard both ends of the surface inside fan guard, connecting rod 5 is equal with the vertical dimension of connecting rod 5 to cover body 2 inwall to the radial distance of flabellum side.Cover body 2 end face can be fixed by bracing piece 8 arrange better, reduce the vibration amplitude of cover body 2 end face, when there are vibrations in cover body 2 end face, vibrations can be directed in frame 1 by arranging of bracing piece 8, to reduce amplitude, bracing piece 8 can select angle bar, I-steel, channel-section steel etc., and bracing piece 8 one end is connected in frame 1, one side posts and fixes with fan guard end face, to increase contact area.Cover body 2 both ends of the surface can be linked together by internal the arranging of connecting rod 5 of cover body 2, strengthen the bulk strength of cover body 2, simultaneously when impeller 3 blade turns over a region, place, the air pressure in this region can produce periodic change, cover body 2 both ends of the surface are produced periodically variable pressure, causing that cover body vibrates, arranging of connecting rod 5 can make the power of cover body 2 both ends of the surface cancel out each other, and reduces the chance producing vibration.Connecting rod 5 is maximum to the radial distance of the flabellum side wind-force that is because this place equal to the radial distance of connecting rod 5 to cover body 2 inwall, and when flabellum rotates, the air pressure change amount at this place is also maximum, and connecting rod 5 is arranged on this place can farthest reduce vibration.Connecting rod 5 is preferably solid steel pole, and when keeping away use hollow steel pipe vibrations, steel duct produces echo, increases noise pollution.
Described connecting rod 5 cross section is oval, and the direction of connecting rod 5 elliptic cross-section major axis is parallel with the wind direction blown in connecting rod 5.The windward side area that can reduce connecting rod 5 is so set, the air-flow produced when reducing fan work blows to connecting rod 5 surface makes connecting rod 5 stress, decrease by the periodically variable air pressure of the generation effect to the power that connecting rod 5 is changed when rotating with flabellum simultaneously, connecting rod 5 is made to produce vibration vibrations, so arrange simultaneously and can also reduce the windage that air-introduced machine is overall, reduce energy consumption.The quantity of connecting rod 5 is preferably 3, is distributed in air outlet 6 to impeller 3 near the oblique lower end of air outlet 6, owing to the area of section of this section changes greatly, the pressure of air also changes greatly, air pressure change is comparatively frequent, it is easy to produces vibration, arranges connecting rod 5 and can play good damping noise reduction effect.
Described air inlet 4 is located at cover body 2 end face, and air inlet 4 is provided with blower cover 7, and blower cover 7 cross section is circular arc, and circular arc opening is towards cover body 2 side.Blower cover 7 arc opening is towards cover body 2 sidewall rather than cover body 2 axis, the area of air inlet 4 can be increased on the one hand, it is beneficial to air intake, blower cover 7 is evagination, during air intake, air intake resistance is less, it is internally formed, at cover body 2, the air channel inside contracted simultaneously, is sucked cover body 2 inside by impeller 3 and compressed air can quickly transfer out air-introduced machine in air channel, be conducive to improving the efficiency of air-introduced machine.
Described impeller 3 is near the end face cross section circular arc of air inlet 4, and circular arc opening is internal towards cover body 2.Impeller 3 near the end face of air inlet 4 towards cover body 2 sidewall rather than towards cover body 2 axis, it is possible to form a circular arc strengthened with the side of blower cover 7, increase the volume in air channel further and resistance that wind flows in air channel.
Described fan guard side is additionally provided with observation window 9.Observation window 9 one end and cover body 2 are hinged, and the other end is connected with cover body 2 by pulling button, observation window 9 the working condition that can observe parts fan guard within easily is set, observation window 9 connects with cover body 2 by pulling to detain, folding with convenience.
Additionally, cover body 2 and impeller 3 surface all scribble rust preventive coating, in order to protect fan guard surface, reduce wind simultaneously and produce friction when impeller 3 and cover body 2 inner surface movement with cover body 2 inner surface and impeller 3 surface, reduce noise volume.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is not limited merely to above-described embodiment, and all technical schemes belonged under this utility model thinking belong to protection domain of the present utility model.It should be pointed out that, for those skilled in the art, without departing from the some improvements and modifications under this utility model principle premise, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (5)
1. a noise-reduction type air-introduced machine, including frame (1), frame (1) is rotatably connected to rotating shaft (10), rotating shaft (10) one end is fixed with impeller (3), the other end is connected with dynamical element, impeller (3) outside is provided with cover body (2), cover body (2) is provided with air inlet (4) and air outlet (6), it is characterized in that: cover body (2) both sides are additionally provided with for reducing the bracing piece (8) that cover body (2) shakes, the axial connecting rod (5) connecting fan guard both ends of the surface it is additionally provided with inside fan guard, connecting rod (5) is equal to the vertical dimension of cover body (2) inwall with connecting rod (5) to the radial distance of flabellum side.
2. noise-reduction type air-introduced machine according to claim 1, is characterized in that: described connecting rod (5) cross section is ellipse, and the direction of connecting rod (5) elliptic cross-section major axis is parallel with the wind direction blown in connecting rod (5).
3. noise-reduction type air-introduced machine according to claim 2, is characterized in that: described air inlet (4) is located at cover body (2) end face, and air inlet (4) is provided with blower cover (7), and blower cover (7) cross section is circular arc, and circular arc opening is towards cover body (2) sidewall.
4. noise-reduction type air-introduced machine according to claim 3, is characterized in that: described impeller (3) is circular arc near the end face cross section of air inlet (4), and circular arc opening is towards cover body (2) sidewall.
5. noise-reduction type air-introduced machine according to claim 3, is characterized in that: described fan guard side is additionally provided with observation window (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521130687.7U CN205349871U (en) | 2015-12-30 | 2015-12-30 | Formula of making an uproar draught fan falls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521130687.7U CN205349871U (en) | 2015-12-30 | 2015-12-30 | Formula of making an uproar draught fan falls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205349871U true CN205349871U (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521130687.7U Expired - Fee Related CN205349871U (en) | 2015-12-30 | 2015-12-30 | Formula of making an uproar draught fan falls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205349871U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425461A (en) * | 2020-04-10 | 2020-07-17 | 台州市杰龙风机厂 | Fan volute with observation window |
-
2015
- 2015-12-30 CN CN201521130687.7U patent/CN205349871U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425461A (en) * | 2020-04-10 | 2020-07-17 | 台州市杰龙风机厂 | Fan volute with observation window |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20181230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |