CN104595252A - Radial annular inlet/outlet air noise eliminating device - Google Patents
Radial annular inlet/outlet air noise eliminating device Download PDFInfo
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- CN104595252A CN104595252A CN201410825932.XA CN201410825932A CN104595252A CN 104595252 A CN104595252 A CN 104595252A CN 201410825932 A CN201410825932 A CN 201410825932A CN 104595252 A CN104595252 A CN 104595252A
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- noise elimination
- cone cylinder
- going out
- enter
- noise eliminating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A radial annular inlet/outlet air noise eliminating device mainly solves the technical problems that an existing noise eliminating device is not ideal in noise reduction effect and the like. According to the technical scheme, the radial annular inlet/outlet air noise eliminating device is characterized by comprising a flow guiding disk, an outer noise eliminating cone cylinder and an inner noise eliminating cone cylinder, one end of the inner noise eliminating cone cylinder is connected with the flow guiding disk, and the other end of the inner noise eliminating cone cylinder is supported by flat steel and arranged in the outer noise eliminating cone cylinder in a sleeved mode to form an air flow channel in a defining mode, wherein the area of the air flow channel is reduced gradually, the geometrical shape of the air flow channel is changed into an axial annulus from a radial annulus in a smooth transition mode; an annular air inlet/outlet is formed between the outer noise eliminating cone cylinder and the flow guiding disk, and an annular air outlet/inlet is formed between the outer noise eliminating cone cylinder and the inner noise eliminating cone cylinder. The radial annular inlet/outlet air noise eliminating device is mainly matched with an axial flow fan or a centrifugal fan, and is widely applied to ventilation systems in mines, tunnels, industrial enterprises and other occasions.
Description
Technical field
The present invention relates to a kind of radial ringed enter (going out) wind silencer.
Background technique
Ventilator is that one is widely used in industrial and mining enterprise, mechanical energy is converted to the general machinery equipment of fluid energy, in its running, produces larger noise.In order to reduce noise and improve aeroperformance, raise the efficiency, before blower fan, all silencing apparatus is housed, before front wind silencing apparatus, also slip ring is housed.Silencing apparatus adopts drum type resistive structures, and generally by flange, outer silencing pot, interior silencing pot forms a ring runner.Filling noise elimination cotton in the annular space of shell and punched-plate inner core, and to burn-on at two ends flange at cylindrical shell, be connected in the import and export of ventilator main frame.Slip ring is made up of rectification cap and flared trumpet pipe, be arranged on before premuffler or main frame, inlet gas is played to the effect of drainage, guiding, drag reduction, the propeller fan silencer of this structural type, the noise that the radial width of reduction is penetrated is had certain effect, but, propeller fan to enter (going out) air port be open type, still quite high at the noise figure entering (going out) mouth, usually, entering noise figure that (going out) air port place records all at 95 dB(A) left and right, to the blower fan of large plane No., enter the noise figure at (going out) air port place at 110 dB(A) more than.Do not reach national departments concerned propose lower than 85dB(A) requirement.
In addition, slip ring and silencing apparatus processing and fabricating respectively, and then assemble, processing technology is complicated.
Summary of the invention
The object of the invention is by structural improvement, provide one can significantly reduce into (going out) mouth noise, and make it lower than 85dB(A) radial ringed enter (going out) wind silencer.
The technical solution adopted for the present invention to solve the technical problems is: it comprises diversion disk, outer noise elimination cone cylinder and interior noise elimination cone cylinder, interior noise elimination cone cylinder one end connects diversion disk, the other end is supported by band steel, be sleeved in outer noise elimination cone cylinder, it is tapering type for surrounding an area, geometrical shape is from radial ringed rounding off to the air-flow path of axial annular, and eliminate the noise outside between cone cylinder and diversion disk and form annular and enter (going out) air port, eliminate the noise outside cone cylinder and interior noise elimination are bored and are formed annular between cylinder and go out (entering) air port.
Described diversion disk is formed by being enclosed by front shrouding 1, straight barrel 2 and front flow guiding plate 3, is filled with muffler material in diversion disk internal cavities; Described outer noise elimination cone cylinder is enclosed by rear guide plate 5, outer noise elimination conic tube 6 and casing cylinder 8 and forms, and is filled with muffler material in outer noise elimination cone cylinder internal cavities; Described interior noise elimination cone cylinder is enclosed by interior noise elimination conic tube 7 and rear shrouding 11 and forms, and is filled with muffler material in interior noise elimination cone cylinder internal cavities.
Front flow guiding plate 3 and rear guide plate 5 are circular arc tray type structure, and the small end of front flow guiding plate 3 is connected with interior noise elimination conic tube 7 rounding off, and the small end of rear guide plate 5 is connected with outer noise elimination conic tube 6 rounding off.Front flow guiding plate 3, rear guide plate 5, outer noise elimination conic tube 6 and interior noise elimination conic tube 7 material adopt punched-plate, and the aperture of punched-plate is no more than 3mm.
At the two ends of runner with more than one round steel 4 or support band steel 10, at circumferencial direction, outer noise elimination cone cylinder is bored cylinder with diversion disk or interior noise elimination respectively and be fixedly connected with; And outer noise elimination cone cylinder and interior noise elimination cone cylinder one end are fixedly attached on flange 9.
Described annular is entered (going out) tuyere position for radial or axially, when axially entering (going out) wind, runner by the rounding off that axially goes in ring to radial ringed, then from radial ringed rounding off to axial annular..Described air-flow path has more than one bend.Enter (going out) air port at runner, be provided with spacing grid type protective net 12.
Also can enter above (going out) air port at runner, by round steel 4 or support band steel 10 and support an annular silencing pot 13, form axial inlets and putlets of ventilation in both sides, axial inlets and putlets of ventilation place, both sides is provided with spacing grid type protective net 12.
The invention has the beneficial effects as follows:
1, to the noise elimination of axial-flow blower, be all try every possible means from blower fan and suppressor case structure in the past, but, do not try every possible means to into and out of air port place noise reduction.But blower fan maximum noise is entering (going out) air port place, and much larger than the noise figure outside casing.Therefore, we are the direction of noise reduction, are placed on the architecture advances aspect of inlets and putlets of ventilation.By adopting radial ringed air inlet mode, in air inlet front end with circular arc disc type noise elimination structure, noise is stoped no longer in axial direction to be propagated.And pass through the guiding of garden arc dish, change the propagation path of noise.Circular arc dish noise elimination structure is again a sound absorbent, has certain assimilation effect to the noise that runner is outwards propagated.In addition, disc type sound absorption structure above, forms the structure of relative closure with silencing apparatus outer cylinder body, has certain sound insulation effect.Adopt the composite sound damping structure be made up of multiple de-noising mechanisms such as this noise elimination, sound absorption, sound insulation, more far better than the noise reduction of adopting merely a kind of muffler material.
2, adopt diameter less, the punched-plate that porosity ratio is lower.Reduce on the one hand the roughness of water passage surface, reduce the drag losses of air-flow, improve fan efficiency, on the other hand, according to micro silencer principle, the orifice plate that the less orifice plate diameter group of diameter is larger has better soundproof effect.
3, adopt unit weight comparatively large, the better noise elimination cotton of soundproof effect, the thickness also corresponding increase of noise elimination cotton.In circular arc disc type noise elimination structure noise elimination cotton and charging quantity much bigger relative to the thickness of blower fan casing cylinder, be more conducive to reduce noise.
4, flow passage structure is optimized, reduces pneumatic noise and eddy current crack.The outer silencing pot of silencer and interior silencing pot are all cone cylinders, make its Flow area be tapering type structure, make air-flow be acceleration mode along runner, on the other hand, make noise along conically shaped dignity guiding, project to greatest extent on circular arc disc type muffler body.
5, front and back diversion disk is designed to arcuate socket plate structure, on the one hand, after making air-flow enter runner from radial ringed direction, enters axial conic tube runner through front and back diversion disk guiding.On the other hand, make the noise of blower fan through conic tube runner out, front diversion disk stops noise in axial direction rectilinear propagation, and to after noise absorbent and decay, then reflects (refraction) and go out.Thus, make noise obtain more effective reduction.Runner carries out design of Simulation according to pneumatic principle, and make it in gradually expansion type or tapering type structure, resistance is less, and aeroperformance improves, and improves efficiency.Process carries out survey formula repeatedly to the model machine of different plane No. and product, and noise is all lower than 85dB (A).Efficiency also improves 4-8%.The requirement of " two 85 " that reach respectively or propose close to the national departments concerned of propeller fan.Meanwhile, slip ring and muffler desing integralization structure, appearance also improves.
Accompanying drawing explanation
Fig. 1 is forward structure cross-sectional schematic of the present invention.
Fig. 2 is the form structure schematic diagram of Fig. 1.
Fig. 3 is that the A of Fig. 1 is to structural representation.
Fig. 4 is embodiment's forward structure schematic diagram that silencing apparatus of the present invention and axial-flow blower assemble.
Fig. 5 is the form structure schematic diagram of Fig. 4.
Fig. 6 is the forward sectional structure schematic diagram of second embodiment of the present invention.
Fig. 7 is the form structure schematic diagram of Fig. 6.
Fig. 8 is the forward sectional structure schematic diagram of the 3rd embodiment of the present invention.
Fig. 9 is that form structure schematic diagram is looked on a left side of Fig. 8.
Figure 10 is the forward sectional structure schematic diagram of the 4th embodiment of the present invention.
Figure 11 is the form structure schematic diagram of Figure 10.
Figure 12 is that form structure schematic diagram is looked on a left side of Figure 10.
In figure: shrouding before 1-, 2-straight barrel, 3-front flow guiding plate, 4-round steel, guide plate after 5-, 6-eliminates the noise outward conic tube, noise elimination conic tube in 7-, 8-casing cylinder, 9-flange, and 10-supports band steel, shrouding after 11-, 12-protective net, 13-annular silencing pot.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details.
Embodiment 1, as Fig. 1, be of the present invention radial ringed enter the forward sectional structure schematic diagram of (going out) wind silencer.Silencing apparatus before main frame or below and slip ring are designed to integral structure by it, form front noise elimination water conservancy diversion circular arc dish, in the cavity that it surrounds, fill muffler material by front shrouding 1, straight barrel 2, front flow guiding plate 3.Form interior silencing pot by interior noise elimination conic tube 7, rear shrouding 11, in the cavity that it surrounds, fill muffler material.Form outer silencing pot by rear guide plate 5, outer noise elimination conic tube 6, casing cylinder 8, in the cavity that it surrounds, fill muffler material.It is tapering type that three muffler bodies surround an area, and geometrical shape is from radial ringed rounding off to the air-flow path of axial annular.Front and back diversion disk is designed to arcuate socket plate structure.On the one hand, after making air-flow enter runner from radial ringed direction, enter axial conic tube runner through front and back diversion disk guiding, along with the continuous minimizing of channel cross-section, speed continues to increase, and the maximum value of airspeed is in the joint with host channel.This place is also the place that in runner, gas-flow resistance is maximum, and other gas-flow resistance is everywhere all few than this place.Thus whole aeroperformance improves, and fan efficiency is improved.On the other hand, the noise of blower fan through conic tube runner out, no longer in axial direction rectilinear propagation, but under the stop of noise elimination conic tube and front guide flow noise elimination disk outside, absorbed and decay, then reflect (refraction) and go out.Meanwhile, because runner has more than one bend, the flow channel length that noise passes through also increases to some extent, also improves soundproof effect.This structure having sound absorption, noise elimination, sound insulation concurrently, has significant reduction to entering (going out) mouth noise.Because the noise of axial-flow blower is mainly entering (going out) air port place, thus, the noise of whole axial-flow blower is reduced.After tested, the axial-flow blower of all size enters the noise at 1 meter of outside (going out) air port, all lower than 85dB (A).The axial-flow blower of little plane No. enters (going out) air port lower than 80dB (A).
As Fig. 2, be of the present invention radial ringed enter the outline drawing of (going out) wind silencer, radial ringed enter (going out) wind position, adopt grid-like protective net that air port is surrounded annular, prevent the foreign matters such as large particle from entering runner.
As Fig. 3, be of the present invention radial ringed enter the A direction view of (going out) wind silencer, support with more than one band steel or round steel spoke fixing between outer noise elimination cylindrical shell and interior noise elimination cylindrical shell, and become an entirety with Flange joint, be convenient to be connected with blower fan main frame.
As Fig. 4, be of the present invention radial ringed enter the propeller fan that forms with two main frames and a noise elimination diffusion barrel of (going out) wind silencer.When blower fan runs in the mode of press-in, air-flow enters from radial ringed silencer, and from the air-out of noise elimination diffusion barrel, when blower fan runs in the mode of extracting out, air-flow enters from from noise elimination diffusion barrel, from radial ringed silencer air-out.When main frame is one, the Placement of each parts is same as described above.No matter be a main frame or multiple host, radial ringed enter (going out) wind silencer all there is identical decrease of noise functions.The urceolus of front and back silencing apparatus and long taper inner core, the gradually expansion type of composition or tapering type runner, the ring runner that main frame outer cylinder body and electric machine casing form, in its joint, axial clearance is little, inner diameter of steel flue is equal, and identical with impeller hub diameter, the runner of this structure, matches with gas dynamics, air resistance is minimum, thus reaches the object of raising the efficiency.
As Fig. 5, be of the present invention radial ringed enter the shape assumption diagram of propeller fan that forms of (going out) wind silencer and two main frames and noise elimination diffusion barrel, compare with the propeller fan main frame of conventional construction side, there is no air intake slip ring, the substitute is air intake and noise elimination integral structure radial ringed enter (going out) wind silencer, further, protective net design radial ringed enter (going out) tuyere position.
Embodiment 2, as Fig. 6, be of the present invention radial ringed enter the forward sectional structure schematic diagram of (going out) wind silencer second embodiment, according to radial ringed enter the noise-cancelling theory of (going out) wind, being designed to more than one bend in runner, when noise is outwards propagated along runner, have multiple tracks " barrier " to intercept, soundproof effect is better.All the other are with embodiment 1.
Embodiment 3, as Fig. 8, are the forward sectional structure schematic diagram of the 3rd embodiment of the present invention, will enter the design of (going out) wind direction in axis, but entering (going out) distinguished and admirable road, to have area be convergent (expansion) formula, radially annular garden is sliding is transitioned into axial structural feature for geometrical shape.
As Fig. 9, be that form structure schematic diagram is looked on a 3rd embodiment's of the present invention left side, protective net is circular ring, is arranged in the axial plane at intake grill place.All the other same above-described embodiments.
Embodiment 4, as Figure 10, are the forward sectional structure schematic diagram of the 4th embodiment of the present invention.Radial ringed enter outside (going out) air port, increase an annular silencing pot structure, runner relative closure, make pneumatic noise through annular silencing pot is many once stop after, then to enter (going out) at axial direction, sound absorption, eliminate the noise, the better effects if of sound insulation.But entering (going out) distinguished and admirable road, to have area be convergent (expansion) formula, radially annular garden is sliding is transitioned into axial structural feature for geometrical shape.
As Figure 11,12, it is the form structure schematic diagram of the 4th embodiment of the present invention.Air intake has both direction, and one is that on the circular air inlet mouth outside cylindrical shell, another is in the axial direction, and two intake grills all devise protective net.All the other same above-described embodiments.
According to radial ringed enter the principle of (wind), its flow passage structure is tapering type according to area, and geometrical shape, from radial ringed rounding off to the form of axial annular, still has other embodiment, all in protection scope of the present invention.
Claims (7)
1. one kind radial ringed enter (going out) wind silencer, it is characterized in that: it comprises diversion disk, outer noise elimination cone cylinder and interior noise elimination cone cylinder, interior noise elimination cone cylinder one end connects diversion disk, the other end is supported by band steel, be sleeved in outer noise elimination cone cylinder, it is tapering type for surrounding an area, geometrical shape is from radial ringed rounding off to the air-flow path of axial annular, and eliminate the noise outside between cone cylinder and diversion disk and form annular and enter (going out) air port, eliminate the noise outside cone cylinder and interior noise elimination are bored and are formed annular between cylinder and go out (entering) air port.
2. according to claim 1 radial ringed enter (going out) wind silencer, it is characterized in that: described diversion disk is enclosed by front shrouding (1), straight barrel (2) and front flow guiding plate (3) and formed, and is filled with muffler material in diversion disk internal cavities; Described outer noise elimination cone cylinder is enclosed by rear guide plate (5), outer noise elimination conic tube (6) and casing cylinder (8) and forms, and is filled with muffler material in outer noise elimination cone cylinder internal cavities; Described interior noise elimination cone cylinder is enclosed by interior noise elimination conic tube (7) and rear shrouding (11) and forms, and is filled with muffler material in interior noise elimination cone cylinder internal cavities.
3. according to claim 2 radial ringed enter (going out) wind silencer, it is characterized in that: front flow guiding plate (3) and rear guide plate (5) are circular arc tray type structure, the small end of front flow guiding plate (3) is connected with interior noise elimination conic tube (7) rounding off, and the small end of rear guide plate (5) is connected with outer noise elimination conic tube (6) rounding off.
4. according to claim 1 radial ringed enter (going out) wind silencer, it is characterized in that: front flow guiding plate (3), rear guide plate (5), outer noise elimination conic tube (6) and interior noise elimination conic tube (7) material adopt punched-plate, and the aperture of punched-plate is no more than 3mm.
5. according to claim 1 radial ringed enter (going out) wind silencer, it is characterized in that: at the two ends of runner with more than one round steel (4) or support band steel (10), at circumferencial direction, outer noise elimination cone cylinder is bored cylinder with diversion disk or interior noise elimination respectively and be fixedly connected with; And outer noise elimination cone cylinder and interior noise elimination cone cylinder one end are fixedly attached on flange (9).
6. according to claim 1 radial ringed enter (going out) wind silencer, it is characterized in that: described annular is entered (going out), and tuyere position is radial direction or axial, when axially entering (going out) wind, air-flow path is from axial annular rounding off to radial ringed, again from radial ringed rounding off to axial annular, described air-flow path has more than one bend, enters (going out) air port at runner, is provided with spacing grid type protective net (12).
7. according to claim 1 radial ringed enter (going out) wind silencer, it is characterized in that: also can enter above (going out) air port at runner, an annular silencing pot (13) is supported by round steel (4) or support band steel (10), formed in both sides and axially enter (going out) air port, both sides are axially entered (going out) air port place and are provided with spacing grid type protective net (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410825932.XA CN104595252A (en) | 2014-12-26 | 2014-12-26 | Radial annular inlet/outlet air noise eliminating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410825932.XA CN104595252A (en) | 2014-12-26 | 2014-12-26 | Radial annular inlet/outlet air noise eliminating device |
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| Publication Number | Publication Date |
|---|---|
| CN104595252A true CN104595252A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410825932.XA Pending CN104595252A (en) | 2014-12-26 | 2014-12-26 | Radial annular inlet/outlet air noise eliminating device |
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| CN (1) | CN104595252A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319063A (en) * | 2019-08-10 | 2019-10-11 | 山西巨龙风机有限公司 | Pull-out type environmental protection booster |
| CN117329173A (en) * | 2023-12-01 | 2024-01-02 | 南京磁谷科技股份有限公司 | Air inlet noise reduction device of high-speed centrifugal compressor |
-
2014
- 2014-12-26 CN CN201410825932.XA patent/CN104595252A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319063A (en) * | 2019-08-10 | 2019-10-11 | 山西巨龙风机有限公司 | Pull-out type environmental protection booster |
| CN117329173A (en) * | 2023-12-01 | 2024-01-02 | 南京磁谷科技股份有限公司 | Air inlet noise reduction device of high-speed centrifugal compressor |
| CN117329173B (en) * | 2023-12-01 | 2024-04-12 | 南京磁谷科技股份有限公司 | Air inlet noise reduction device of high-speed centrifugal compressor |
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Application publication date: 20150506 |