CN207454347U - A kind of noise elimination efficient centrifugal wind turbine - Google Patents
A kind of noise elimination efficient centrifugal wind turbine Download PDFInfo
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- CN207454347U CN207454347U CN201721361506.0U CN201721361506U CN207454347U CN 207454347 U CN207454347 U CN 207454347U CN 201721361506 U CN201721361506 U CN 201721361506U CN 207454347 U CN207454347 U CN 207454347U
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Abstract
The utility model is related to a kind of noise elimination efficient centrifugal wind turbines, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor, back shroud of impeller for it is circular and with the output axis connection of motor, after the impeller on cover board, front shroud of impeller separates blade circle distribution with blade；The inside edge of front shroud of impeller is connected with air inlet, and outer ledge is connected with the cylinder being fixed on air inlet, front shroud of impeller, air inlet and cylinder form an inner wall for smooth surface and it is interior without leave among to the gradual increased hollow cylinder in both ends；It is cavity between the inner wall and outer wall of hollow cylinder；Micropore, punching rate≤3% are provided on the surface of hollow cylinder and air flow contacts.The utility model separates blade with front shroud of impeller, reduces difficulty of processing, and blade and back shroud of impeller are integrally machined shaping, improve blower pressure；Micropore is opened up on the surface of hollow cylinder and air flow contacts, forms reactive muffler, gas-flow resistance is small, and the pressure loss is small, excellent noise reduction effect.
Description
Technical field
The utility model belongs to universal machine field of ventilation equipment, is related to a kind of noise elimination efficient centrifugal wind turbine.
Background technology
Centrifugal blower is the pressure energy and kinetic energy that gas is converted to using the mechanical energy of draught fan impeller rotation, and gas is defeated
It sees off, gas is rotated through impeller and generates air energy along the streamlined air inlet air inlet through hollow shaft of wind turbine, along screw type housing by gas
Body radially exports, then is sent out from shell air outlet.In centrifugal blower, gas is from axially into impeller, when gas flows through impeller
It is radially redirected, subsequently into diffuser.In diffuser, the gas and changing flow direction and increase of conduit section area makes
Flow slowing down, this decelerating effect convert kinetic energy into pressure energy.Pressure, which increases, to be occurred mainly in impeller, next is happened at expansion
Press through journey.
Centrifugal blower essential structure is as shown in Figure 1, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller
And motor, in the manufacture of existing Small Centrifugal Fan, blade, front shroud of impeller and back shroud of impeller are often integrally machined,
Complicated integral structure, difficulty of processing is big, and generally requiring five axis and more than machining center could process, and processing cost is higher, and by
Material properties limit, and integral strength is poor, is only capable of meeting the slow-speed of revolution and the requirement of low-pressure；And, collection high for matching requirements
Stream device and impeller assembling gap cross conference and cause pressure leakage, it is difficult to ensure fan outlet pressure.
Centrifugal blower work noise main source rotates the electromagnetic noise of the aerodynamic noise brought and motor for wind turbine.
When centrifugal blower works, by driving motor moving blade, air is sucked vertically and radially excludes air, can be produced at work
Raw noise and vibration, particularly small-sized high speed centrifugal blower fan rotating speed are high, can generally reach 15000 turns, blower air power is made an uproar
Sound is very big；And the electromagnetic noise of this high-speed electric expreess locomotive is equally very high, this noise can seriously affect the physical and mental health of staff.
Therefore, a kind of processing of exploitation is simple, of low cost, matching requirements are low, good integral strength can meet high-revolving want
It asks and the great realistic meaning of noise elimination efficient centrifugal wind turbine of excellent noise reduction effect.
Utility model content
The purpose of the utility model is to overcome prior art centrifugal blower difficulty of processing is big, processing cost is low, matching requirements
High, the defects of integral strength difference and noise is big, provide a kind of processing is simple, of low cost, matching requirements are low, good integral strength,
Low noise and rotating speed and the higher noise elimination efficient centrifugal wind turbine of efficiency.
To achieve the above object, the utility model is solved by the following technical programs：
A kind of noise elimination efficient centrifugal wind turbine, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and electricity
Machine, the back shroud of impeller for it is circular and with the output axis connection of motor, the blade circle distribution is after the impeller on cover board；
The front shroud of impeller is separated with blade, simplifies the structure of prophyll piece integral piece, reduces difficulty of processing, is reduced
Processing cost；And due to the reduction of difficulty of processing, available material is more, and selecting intensity, more preferably material is added
Work can promote integral strength；
The inside edge of the front shroud of impeller is connected with air inlet, and outer ledge and the cylinder being fixed on air inlet connect
It connects, the front shroud of impeller, air inlet and cylinder form an inner wall and gradually increase to both ends for smooth surface and interior centre without leave
Hollow cylinder；
It is cavity between the inner wall and outer wall of the hollow cylinder；
It is provided with micropore on the surface of the hollow cylinder and air flow contacts, punching rate≤3%, aperture≤1mm of micropore,
Re-sistance silencer is formed, microperforated panel punching rate is low, any surface finish, and the resistance of air-flow is small, and the pressure loss is very small, while it
The also characteristics such as high temperature resistant, oil resistant, waterproof, fire prevention and anticorrosion.
As preferred technical solution：
The material on the surface of a kind of noise elimination efficient centrifugal wind turbine as described above, the hollow cylinder and air flow contacts is thickness
Metallic plate of the degree less than 1mm；
The micropore is uniformly distributed on the surface of hollow cylinder and air flow contacts；
The punching rate is 1~3%；
The aperture of the micropore is 0.5~1mm；
The blade is circular arc type or airfoil type, and circular arc type vane efficiency is general, but processes relatively simple, wing blades
Efficiency is relatively high, but processes more complicated；
The distance between the front shroud of impeller two faces opposite with blade≤1mm, front shroud of impeller are opposite with blade
The distance between two faces be usually what is determined according to machining accuracy, it is theoretically the smaller the better, be easy to cause leaf apart from excessive
Top leakage loss is larger, experiments have shown that, distance often increases 1mm, and pressure about reduces by 5%.
A kind of noise elimination efficient centrifugal wind turbine as described above, the front shroud of impeller are provided around on the face opposite with blade
The annular projection of blade, the annular projection can substantially reduce leaf top leakage loss, raised shape be not limited to it is annular or
Before the impeller on cover board circumference uniform distribution multiple protrusions, as long as raised position can play the role of reducing the leakage loss of leaf top i.e.
It can；
The annular projection is 0mm along itself axial spacing with blade, before annular projection outer rim just wraps up blade
End, you can to reduce the leakage loss of leaf top, and do not stop that gas flows, the annular projection is along itself radially spacing with blade
For 1~2mm, which set conference to cause certain atmospheric pressure lost, and setting is too small to cause process and assemble difficulty excessive, shadow
Ring yields；
The annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping are welded with iron plate.
A kind of noise elimination efficient centrifugal wind turbine as described above is fixed on the blade face opposite with front shroud of impeller and adds
Qiang Huan, the outer ledge of the reinforcing ring intersect with the outer ledge of blade, wherein, outer ledge refers to apart from motor output shaft
Central axis apart from farthest edge.
A kind of noise elimination efficient centrifugal wind turbine as described above, the reinforcing ring are laminated structure, the width of the reinforcing ring
For 2~5mm, reinforcement ring width is excessive, can stop that gas flows, the too small then stiffening effect of width is bad；The reinforcing ring, blade
With back shroud of impeller entirety milling.
A kind of noise elimination efficient centrifugal wind turbine as described above, the edge of the back shroud of impeller and the outer ledge phase of blade
It hands over, the outer ledge of the blade refers to central axis apart from motor output shaft apart from farthest edge；
Annular diffuser is fixed on the back side panel of the casing, the two surrounds circular groove；
The back shroud of impeller is sunk in the circular groove, and diffuser is fixed on casing back side panel, impeller protecgulum
Plate forms impeller outlet diffuser together with diffuser, and this structure can reduce impeller weight, and reduce the rotation of diffuser
Turn friction loss, reduce the centrifugal force that impeller is generated due to high speed rotation, enhance impeller intensity.
A kind of noise elimination efficient centrifugal wind turbine as described above, the one side of the back shroud of impeller are located in the slot of circular groove
Space, another side are flushed with the opening face of circular groove, if do not flush either back shroud of impeller part sink to or impeller after
Cover board is excessively sunk in circular groove, when the out-of-date easy generation vortex of gas stream, increases loss；The back shroud of impeller and circle
The distance between the center overlapping of axles of groove, the edge and circular groove inner wall of the back shroud of impeller be 1~2mm, the distance
It is mainly configured according to machining accuracy and assembly precision, distance set conference to cause certain atmospheric pressure lost, and distance was set
It is small that larger challenge can be brought to process and assemble.
A kind of noise elimination efficient centrifugal wind turbine as described above, the back side panel of the casing are bolted to connection in motor
Installing plate on；
The back side panel one side of the casing is covered with muffler plate I, and another side is covered with muffler plate II；
The muffler plate I between back shroud of impeller and the back side panel of casing, around circular groove and with impeller rear cover
There are gaps, muffler plate I between plate mainly to absorb aerodynamic noise in casing；
The muffler plate II is connected with arc muffler plate III, and arc muffler plate III is sleeved on outside motor, muffler plate II and arc
Muffler plate III mainly absorbs noise of motor.
A kind of noise elimination efficient centrifugal wind turbine as described above, the muffler plate I, muffler plate II and arc muffler plate III it is interior
Portion filling glass cotton, the thickness of filler is identical or different, and the thickness of filler is 10~20mm, and filler thickness can be according to gas
The actual size of moving noise and noise of motor is configured, when noise is larger, it is possible to increase the thickness of filler, the thicker meeting of filler
Cost is influenced to a certain extent；
The size in the gap be 4~6mm, too small then more demanding to the installation accuracy of muffler plate, the meeting of gap setting
Production efficiency is influenced, gap setting is excessive, is equivalent to the covert volume for increasing wind turbine, it is convenient to affect to a certain extent
Property；
The arc muffler plate III is semi-cylindrical shaped, and semicircular cylinder here can be that the plane of cylinder center axis will circle
Cylinder be divided into the semicircular cylinder that is formed after two halves or only cylinder center axis by cylinder it is non-be divided into formed after two halves half
Cylinder, the rectangular aperture face of the semicircular cylinder and the central shaft of motor are in the same plane, the rectangular aperture of the semicircular cylinder
The central shaft of face and semicircular cylinder is in the same plane, and the relative position of semicircular cylinder and motor such setting is not only improved installation
It is also beneficial to eliminate noise；
The muffler plate II is attached by welding with arc muffler plate III.
A kind of noise elimination efficient centrifugal wind turbine as described above, rotating speed >=10000rpm of noise elimination efficient centrifugal wind turbine eliminate the noise
Efficiency >=65% of efficient centrifugal wind turbine.
Utility model mechanism：
The utility model is by the way that air inlet, impeller cover and cylinder integration are processed into before hollow cylinder realizes impeller
Cover board is separated with blade, at the same open up on the surface of hollow cylinder and air flow contacts (perforated plate) that size is smaller and punching rate compared with
Low micropore achieves the preferable effect for reducing noise, improving fan efficiency and blower pressure.First, hollow cylinder with
The micropore that size is smaller and punching rate is relatively low is opened up on the surface of air flow contacts and forms re-sistance silencer, air-flow flows through hollow
Resistance is small during cylinder, and the pressure loss is very small, can effectively reduce noise, and perforated plate and below cavity form an acoustic resonator, it has
One intrinsic frequency when frequency of sound wave is consistent with the resonant frequency, resonates, and the acoustic vibration in system generates strong amplification,
If there is appropriate deadener in cavity, then sound energy consumption that can be strong reaches good noise elimination effect, when Acoustic Wave Propagation arrives
On perforated microstructure, due to aperture very little, punching rate is low, and so the flow resistance of itself can be with the characteristic impedance of surrounding air
Match somebody with somebody, it is not necessary to which separately plus deadener can form good broad resonance sound absorption structure, for the higher sound wave of frequency, micropunch
Structure is equivalent to sound-absorbing porous material consume acoustic energy, and for the relatively low sound wave of frequency, microperforated panel is equivalent to resonance thin plate again
Acoustic energy is consumed, thus with excellent broadband sound absorbing performance；Secondly, by the separation of front shroud of impeller and blade, reduce
Air inlet component, and anti-vortex ring can be played the role of, after gas outflow impeller enters spiral case, slow down along spiral case diffusion and flow
It is dynamic, flow field dynamics are improved, reduce vortex, reduce large scale whirlpool in casing, improve fan efficiency, are overcome existing
Have existing for technology that area of space is larger between front shroud of impeller and case front, can be generated after gas outflow impeller in this space
The problem of vortex causes energy loss, reduces fan efficiency；Finally, the separation of front shroud of impeller and blade is passed through so that wind
Stress greatly reduces suffered by machine, and rotation speed of fan can be increased to more than 10000rpm, can effectively improve blower pressure.In addition, this
Utility model is also by the way that diffuser is fixed on casing back side panel so that front shroud of impeller forms annular flow together with diffuser
The impeller outlet diffuser of road structure, increases runner circulation area, plays the role of deceleration diffusion, which can be reduced
Impeller weight further through stationary diffuser, reduces the spin friction loss of diffuser, reduces what impeller was generated due to high speed rotation
Centrifugal force enhances impeller intensity.The front shroud of impeller upper end of the utility model is equipped with an annular projection, it is possible to reduce reveals on leaf top
Loss.The utility model can reduce pneumatically making an uproar in volute of blower by installing deadener before and after the back side panel of casing
Sound simultaneously absorbs noise of motor, and better noise elimination effect is obtained with reactive muffler mutual cooperation.
Advantageous effect：
(1) a kind of noise elimination efficient centrifugal wind turbine of the utility model, blade with front shroud of impeller is separated, is significantly reduced
Difficulty of processing and processing cost, blade and back shroud of impeller are integrally machined shaping, and stress suffered by wind turbine, which greatly reduces, can meet wind
The high-revolving requirement of machine, improves blower pressure；
(2) a kind of noise elimination efficient centrifugal wind turbine of the utility model, is provided on the surface of hollow cylinder and air flow contacts
Micropore forms re-sistance silencer, and microperforated panel punching rate is low, any surface finish, and the resistance of air-flow is small, and the pressure loss is very small,
Noise can effectively be reduced；
(3) a kind of noise elimination efficient centrifugal wind turbine of the utility model, diffuser is fixed on casing back side panel, with leaf
Take turns front shroud composition impeller outlet diffuser, you can to reduce impeller weight, and reduce spin friction loss and the leaf of diffuser
The centrifugal force generated due to high speed rotation is taken turns, significantly enhances impeller intensity；
(4) a kind of noise elimination efficient centrifugal wind turbine of the utility model, front shroud of impeller, air inlet and cylinder are integrally machined into
Type had both reduced air inlet component, and it can play the role of anti-vortex ring again, reduce large scale whirlpool in casing, improve wind
Engine efficiency reduces fan noise；
(5) a kind of noise elimination efficient centrifugal wind turbine of the utility model, by installing muffler plate additional inside and outside casing, both reduced
Aerodynamic noise in casing, and the electromagnetic noise of motor is reduced, whole noise reduction is apparent, and the design of arc muffler plate
It is easy for installation；
(6) there is a kind of noise elimination efficient centrifugal wind turbine of the utility model simple processing, low processing cost, assembling to want
It seeks low, excellent noise reduction effect and good integral strength can meet high-revolving the characteristics of requiring.
Description of the drawings
Fig. 1 is the structure diagram of the centrifugal blower of the prior art；
Fig. 2 is a kind of structure diagram of noise elimination efficient centrifugal wind turbine of the utility model；
Fig. 3 is the partial enlarged view of B in Fig. 2；
Fig. 4 is the schematic diagram of the hollow cylinder of front shroud of impeller, air inlet and the cylinder composition of the utility model；
Fig. 5 is a kind of possible structure diagram of noise elimination efficient centrifugal wind turbine of the utility model；
Fig. 6 is the partial enlarged view of B in Fig. 5；
Fig. 7 is the partial enlarged view of C in Fig. 5；
Wherein 1- casings, 2- air inlets, 3- blades, 4- motors, 5- front shroud of impeller, 6- back shroud of impeller, 7- micropores, 8-
Reinforcing ring, 9- diffusers, 10- muffler plates I, 11- muffler plate II, 12- arc muffler plate III, 13- cylinder, 14- annular projections.
Specific embodiment
The following further describes the utility model with specific embodiments.It is to be understood that these embodiments are merely to illustrate
The utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, it is reading in the utility model instruction
After appearance, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this
Apply for the appended claims limited range.
Embodiment 1
A kind of noise elimination efficient centrifugal wind turbine, as shown in Fig. 2, including casing 1, air inlet 2, blade 3, front shroud of impeller 5, leaf
Take turns back shroud 6 and motor 7.
Casing 1 is the cored screw shape unsymmetric structure of a bottom opening, and back side panel, that is, not opening face of casing 1 passes through spiral shell
Bolt is fixedly connected on the installing plate of motor 4, and aperture position corresponds to cone arc air inlet 2, air inlet 2 and annular impeller front shroud
The impeller that blade 3 is formed, impeller diameter 200mm is completely covered in 5 connections, front shroud of impeller 5, and blade 3 is arc-shaped, impeller
Front shroud 5 and blade 3 are that the distance between separated structure, two faces opposite with blade 3 of front shroud of impeller 5 is 1mm, before impeller
The annular projection 14 of blade is provided around on the face opposite with blade 3 of cover board 5, annular projection 14 is vertically with the spacing of blade
0mm, annular projection 14 are radially 1mm with the spacing of blade, and the inside edge of front shroud of impeller 5 is connected with air inlet 2, outside
Edge is connected with the cylinder 13 being fixed on air inlet 2, and it is smooth that front shroud of impeller 5, air inlet 2 and cylinder 13, which form an inner wall,
Curved surface and it is interior without leave among to both ends gradually increased hollow cylinder as shown in figure 4, hollow cylinder inner wall and outer wall between be
Cavity, as shown in figure 3, being evenly distributed with micropore, punching rate 3%, the hole of micropore on the surface of hollow cylinder and air flow contacts
Footpath is 0.5mm, and the material on the surface of hollow cylinder and air flow contacts is the metallic plate that thickness is 0.9mm；3 opposite side of blade is arranged
There is back shroud of impeller 6,6 center of back shroud of impeller is provided with the output axis connection of through hole and motor 4.
Blade 3 and the whole milling of back shroud of impeller 6, annular projection 14,13 one of front shroud of impeller 5, air inlet 2 and cylinder
Casting, the back side panel of casing 1 are bolted to connection on the installing plate of motor 4.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 10200rpm, efficiency 70.2%.Empirical tests, the utility model disappear
Sound pitch effect centrifugal blower difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable,
Matching requirements are low；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 2
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 1, difference be its before the impeller cover board with
There is no annular projection on the opposite face of blade, front shroud of impeller, air inlet and cylinder are welded with iron plate, front shroud of impeller and blade
The distance between two opposite faces are 0.9mm, and blade is airfoil type, plate thickness 0.95mm, and punching rate 1% is micro-
The aperture in hole is 0.8mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 15000rpm, efficiency 70%.Empirical tests, the noise elimination of the utility model
Efficient centrifugal wind turbine difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable, dress
It is low with requiring；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 3
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 2, and difference is it before blade and impeller
Sheet reinforcing ring is fixed on the opposite face of cover board, the outer ledge of reinforcing ring intersects with the outer ledge of blade, wherein outside
Edge refers to central axis apart from motor output shaft apart from farthest edge, and the width of reinforcing ring is 5mm, reinforcing ring, blade
With back shroud of impeller entirety milling, the distance between front shroud of impeller two faces opposite with blade be 0.8mm, plate thickness
For 0.85mm, punching rate 2%, the aperture of micropore is 0.6mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 10500rpm, efficiency 68.5%.Empirical tests, the utility model disappear
Sound pitch effect centrifugal blower difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable,
Matching requirements are low；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 4
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 1, and difference is it before blade and impeller
Sheet reinforcing ring is fixed on the opposite face of cover board, the outer ledge of reinforcing ring intersects with the outer ledge of blade, wherein outside
Edge refers to central axis apart from motor output shaft apart from farthest edge, and the width of reinforcing ring is 2mm, reinforcing ring, blade
With back shroud of impeller entirety milling, annular projection is radially 2mm with the spacing of blade, and the punching rate of metallic plate is 2.5%, micro-
The aperture in hole is 1mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 11000rpm, efficiency 69%.Empirical tests, the noise elimination of the utility model
Efficient centrifugal wind turbine difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable, dress
It is low with requiring；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 5
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 3, and difference is that the width of reinforcing ring is
3.5mm；Intersect with the outer ledge of blade at the edge of back shroud of impeller；It is fixed with annular diffuser on the back side panel of casing, two
Person surrounds circular groove, and the one side of back shroud of impeller is located at the opening in space in the slot of circular groove, another side and circular groove
Face flushes, the center overlapping of axles of back shroud of impeller and circular groove, between the edge of back shroud of impeller and circular groove inner wall
Distance is 1mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 10800rpm, efficiency 67.5%.Empirical tests, the utility model disappear
Sound pitch effect centrifugal blower difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable,
Matching requirements are low；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 6
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 5, and difference is that the width of reinforcing ring is
4mm；The distance between edge and circular groove inner wall of back shroud of impeller are 2mm；Cover board is opposite with blade before the impeller for it
Be provided around the annular projection of blade on face, annular projection is 0mm with the spacing of blade vertically, annular projection radially with leaf
The spacing of piece be 1.5mm, annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 11050rpm, efficiency 67%.Empirical tests, the noise elimination of the utility model
Efficient centrifugal wind turbine difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable, dress
It is low with requiring；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 7
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 5, and difference is the edge of back shroud of impeller
The distance between circular groove inner wall is 1.5mm；The back side panel of casing is two-sided covered with muffler plate, that is, muffler plate I and muffler plate
II, wherein muffler plate I are between back shroud of impeller and the back side panel of casing, in annular shape, internal filling glass cotton, and filler
Gap of the thickness between 20mm, with back shroud of impeller be 4mm, the back side panel of casing is completely covered；Muffler plate II
On the outside of casing, in annular shape, internal filling glass cotton, the thickness of filler is 10mm, and part covers the rear side of casing
Plate, II opposite side of muffler plate are welded with arc muffler plate III, and arc muffler plate III is the semi-cylindrical shaped of rectangular surfaces opening, positioned at electricity
The surface of machine, internal filling glass cotton, the thickness of filler are central shaft, the electricity of 20mm, rectangular aperture face and semicircular cylinder
The central shaft of machine is respectively positioned in same level.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 11000rpm, efficiency 65%.Empirical tests, the noise elimination of the utility model
Efficient centrifugal wind turbine difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable, dress
It is low with requiring；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 8
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 7 as shown in Fig. 5,6 and 7, and difference is
The distance between edge and circular groove inner wall of back shroud of impeller are 1.8mm；Its cover board face opposite with blade before the impeller
On be provided around the annular projection of blade, annular projection is 0mm with the spacing of blade vertically, annular projection radially with blade
Spacing for 1.2mm, annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping；Muffler plate I and impeller rear cover
Gap between plate is 6mm, and the thickness of muffler plate I inner stuffings is 10mm, and the thickness of muffler plate II inner stuffings is 20mm, is disappeared
The thickness of sound plate III inner stuffings is 10mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 12000rpm, efficiency 66.2%.Empirical tests, the utility model disappear
Sound pitch effect centrifugal blower difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable,
Matching requirements are low；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 9
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 2, and difference is that the back side panel of casing is two-sided
Covered with muffler plate, that is, muffler plate I and muffler plate II, wherein muffler plate I between back shroud of impeller and the back side panel of casing,
In annular shape, internal filling glass cotton, the gap of the thickness of filler between 16mm, with back shroud of impeller is 5mm, will
The back side panel of casing is completely covered；Muffler plate II is located on the outside of casing, in annular shape, internal filling glass cotton, and the thickness of filler
It spends for 15mm, part covers the back side panel of casing, and II opposite side of muffler plate is welded with arc muffler plate III, arc muffler plate III
For the semi-cylindrical shaped of rectangular surfaces opening, positioned at the surface of motor, internal filling glass cotton, the thickness of filler is 15mm,
The central shaft of rectangular aperture face and semicircular cylinder, the central shaft of motor are respectively positioned in same level.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 10010rpm, efficiency 68%.Empirical tests, the noise elimination of the utility model
Efficient centrifugal wind turbine difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable, dress
It is low with requiring；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 10
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 2, and difference is on the back side panel of casing solid
Surely there is annular diffuser, the two surrounds circular groove, and the one side of back shroud of impeller is located at space in the slot of circular groove, another side
It is flushed with the opening face of circular groove, the center overlapping of axles of back shroud of impeller and circular groove, the edge and circle of back shroud of impeller
The distance between connected in star inner wall is 1.4mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 10200rpm, efficiency 68.5%.Empirical tests, the utility model disappear
Sound pitch effect centrifugal blower difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable,
Matching requirements are low；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 11
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 9, and difference is on the back side panel of casing solid
Surely there is annular diffuser, the two surrounds circular groove, and the one side of back shroud of impeller is located at space in the slot of circular groove, another side
It is flushed with the opening face of circular groove, the center overlapping of axles of back shroud of impeller and circular groove, the edge and circle of back shroud of impeller
The distance between connected in star inner wall is 1.8mm；Gap between muffler plate I and back shroud of impeller is 4.5mm, is filled out in muffler plate I
The thickness of object is filled for 15mm, and the thickness of muffler plate II inner stuffings is 18mm, and the thickness of muffler plate III inner stuffings is 14mm.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 10500rpm, efficiency 69%.Empirical tests, the noise elimination of the utility model
Efficient centrifugal wind turbine difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable, dress
It is low with requiring；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Embodiment 12
A kind of noise elimination efficient centrifugal wind turbine, structure is substantially the same manner as Example 11, and difference is its cover board before the impeller
The annular projection of blade is provided around on the face opposite with blade, annular projection is vertically 0mm with the spacing of blade, annular convex
It is radially 1.7mm with the spacing of blade to rise, annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping.
The rotating speed of the noise elimination efficient centrifugal wind turbine be 11200rpm, efficiency 69.5%.Empirical tests, the utility model disappear
Sound pitch effect centrifugal blower difficulty of processing is low, low processing cost, and integral strength high energy meets high-revolving requirement, and design is reasonable,
Matching requirements are low；It is apparent and simple in structure compared to conventional centrifugal wind turbine noise reduction, it is easy to assembly.
Claims (10)
1. a kind of noise elimination efficient centrifugal wind turbine, including casing, air inlet, blade, front shroud of impeller, back shroud of impeller and motor,
The back shroud of impeller for it is circular and with the output axis connection of motor, the blade circle distribution is special after the impeller on cover board
Sign is：
The front shroud of impeller is separated with blade；
The inside edge of the front shroud of impeller is connected with air inlet, and outer ledge is connected with the cylinder being fixed on air inlet,
The front shroud of impeller, air inlet and cylinder form an inner wall for smooth surface and it is interior without leave among to the gradual increased sky in both ends
Heart cylinder；
It is cavity between the inner wall and outer wall of the hollow cylinder；
Micropore, punching rate≤3%, aperture≤1mm of micropore are provided on the surface of the hollow cylinder and air flow contacts.
2. a kind of noise elimination efficient centrifugal wind turbine according to claim 1, which is characterized in that the hollow cylinder connects with air-flow
The material on tactile surface is less than the metallic plate of 1mm for thickness；
The micropore is uniformly distributed on the surface of hollow cylinder and air flow contacts；
The punching rate is 1~3%；
The aperture of the micropore is 0.5~1mm；
The blade is circular arc type or airfoil type；
The distance between the front shroud of impeller two faces opposite with blade≤1mm.
3. a kind of noise elimination efficient centrifugal wind turbine according to claim 2, which is characterized in that the front shroud of impeller and blade
The annular projection of blade is provided around on opposite face；
The annular projection is 0mm with the spacing of blade vertically, the annular projection radially with the spacing of blade for 1~
2mm；
The annular projection, front shroud of impeller, air inlet and cylinder integrally casting shaping are welded with iron plate.
4. a kind of noise elimination efficient centrifugal wind turbine according to claim 2, which is characterized in that the blade and front shroud of impeller
Reinforcing ring is fixed on opposite face, the outer ledge of the reinforcing ring intersects with the outer ledge of blade, wherein, outer ledge
Refer to the central axis apart from motor output shaft apart from farthest edge.
5. a kind of noise elimination efficient centrifugal wind turbine according to claim 4, which is characterized in that the reinforcing ring is sheet knot
Structure, the width of the reinforcing ring is 2~5mm；The reinforcing ring, blade and back shroud of impeller entirety milling.
A kind of 6. noise elimination efficient centrifugal wind turbine according to claim 1, which is characterized in that the edge of the back shroud of impeller
Intersect with the outer ledge of blade, the outer ledge of the blade refers to that central axis distance apart from motor output shaft is farthest
Edge；
Annular diffuser is fixed on the back side panel of the casing, the two surrounds circular groove；
The back shroud of impeller is sunk in the circular groove.
A kind of 7. noise elimination efficient centrifugal wind turbine according to claim 6, which is characterized in that the one side of the back shroud of impeller
The space in the slot of circular groove, another side are flushed with the opening face of circular groove；The back shroud of impeller and circular groove
Center overlapping of axles, the distance between the edge and circular groove inner wall of the back shroud of impeller are 1~2mm.
8. a kind of noise elimination efficient centrifugal wind turbine according to claim 1, which is characterized in that the back side panel of the casing passes through
Bolt is fixedly connected on the installing plate of motor；
The back side panel one side of the casing is covered with muffler plate I, and another side is covered with muffler plate II；
The muffler plate I between back shroud of impeller and the back side panel of casing, around circular groove and with back shroud of impeller it
Between there are gaps；
The muffler plate II is connected with arc muffler plate III, and arc muffler plate III is sleeved on outside motor.
9. a kind of noise elimination efficient centrifugal wind turbine according to claim 8, which is characterized in that the muffler plate I, muffler plate II
With the inside filling glass cotton of arc muffler plate III, the thickness of filler is identical or different, and the thickness of filler is 10~20mm；
The size in the gap is 4~6mm；
The arc muffler plate III is semi-cylindrical shaped, and the rectangular aperture face of the semicircular cylinder and the central shaft of motor are located at same
In plane, the rectangular aperture face of the semicircular cylinder and the central shaft of semicircular cylinder are in the same plane；
The muffler plate II is attached by welding with arc muffler plate III.
10. according to a kind of noise elimination efficient centrifugal wind turbine of claim 1~9 any one of them, which is characterized in that eliminate the noise efficiently from
Rotating speed >=10000rpm of heart wind turbine, efficiency >=65% of noise elimination efficient centrifugal wind turbine.
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| CN201721361506.0U CN207454347U (en) | 2017-10-23 | 2017-10-23 | A kind of noise elimination efficient centrifugal wind turbine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559223A (en) * | 2017-10-23 | 2018-01-09 | 上海瑞晨环保科技有限公司 | A kind of noise elimination efficient centrifugal blower fan |
| CN109099006A (en) * | 2018-07-20 | 2018-12-28 | 中车唐山机车车辆有限公司 | impeller, blower and rail vehicle |
-
2017
- 2017-10-23 CN CN201721361506.0U patent/CN207454347U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559223A (en) * | 2017-10-23 | 2018-01-09 | 上海瑞晨环保科技有限公司 | A kind of noise elimination efficient centrifugal blower fan |
| CN107559223B (en) * | 2017-10-23 | 2024-03-19 | 上海瑞晨环保科技股份有限公司 | High-efficient centrifugal fan of noise elimination |
| CN109099006A (en) * | 2018-07-20 | 2018-12-28 | 中车唐山机车车辆有限公司 | impeller, blower and rail vehicle |
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Address after: 201818 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Patentee after: Shanghai Rui Chen environmental protection Polytron Technologies Inc Address before: 201818 2, 1501, 1519, 1533, Chengliu Middle Road, Jiading District, Shanghai. Patentee before: Shanghai Richen Environmental Technology Co., Ltd. |
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