CN104632714A - High-efficiency low-noise axial flow fan - Google Patents
High-efficiency low-noise axial flow fan Download PDFInfo
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- CN104632714A CN104632714A CN201410822340.2A CN201410822340A CN104632714A CN 104632714 A CN104632714 A CN 104632714A CN 201410822340 A CN201410822340 A CN 201410822340A CN 104632714 A CN104632714 A CN 104632714A
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- noise elimination
- noise
- air
- going out
- diameter
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Classifications
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
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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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- 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
- F04D29/664—Sound attenuation by means of sound absorbing material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A high-efficiency low-noise axial flow fan mainly solves the technical problems that an existing axial flow fan is low in efficiency, high in noise and the like. According to the technical scheme, the high-efficiency low-noise axial flow fan is characterized by comprising a main fan body (2), a radial annular inlet (outlet) air muffler device (1) and a muffling diffusion cylinder (4), wherein the two ends of the main fan body (2) are connected with the radial annular inlet (outlet) air muffler device (1) and the muffling diffusion cylinder (4) respectively. A cylindrical housing (209) of the main fan body (2) and a motor housing (215) form an airflow passage. The inner wall of the motor shell (215) is provided with an axial rib plate or a fan-shaped block to support a stator (205). The outer diameter of the motor housing (215) is consistent with the diameter of a hub of an impeller (216), the diameter of an inner cylinder of a front muffler and the diameter of an inner cylinder of a rear muffler. The two ends of the motor housing (215) are basically flush with one end of a main fan body housing. A flange fixing a rotator and an end cover are arranged on the inner side of the motor housing (215). Accordingly, resistance loss is reduced. An air inlet (outlet) flow passage is designed to be of a gradual-shrinkage structure and a gradual-expansion structure, so aerodynamic performance and efficiency are improved; by the adoption of the radial annular inlet (outlet) air muffler device and the main fan body housing muffling structure combining multiple mechanisms, the purpose of noise reduction is achieved. The high-efficiency low-noise axial flow fan can be widely applied to ventilation on various occasions such as mines, tunnels, industries and enterprises.
Description
Technical field
The present invention relates to a kind of high-efficient low-noise propeller fan.
Background technique
It is large that propeller fan has flow, and volume is little, the feature that pressure head is low, is widely used in the ventilation system of large discharge in various needs.The simplest structure is at flanged (FLGD) garden cylindrical shell intermediate arrangement motor, and an installation impeller forms a propeller fan main frame on motor-shaft extending.In order to reduce the noise of axial-flow blower and raise the efficiency, usually at main barrel external week parcel muffler material, composition noise elimination structure, before main frame, air intake direction connects the premuffler of a band inner core, connects air intake slip ring again at premuffler.After main frame, connect noise elimination diffusion barrel, air-flow is that axial direction enters (or discharge) main frame., there is following some shortcomings part in the axial-flow blower of this structural type.
1, noise is large.At main frame and the radial outside entering (going out) wind silencing apparatus, because of the effect of silencing plate, certain consumption is had to noise, but entering (going out) air port is 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 95d (B) about A, the noise figure to the blower fan of large plane No., entering (going out) air port place reaches 110d (B) A.Higher than the requirement of 85d (B) A of relative national standards.
2, efficiency is low.Detected by a large amount of prototype tests and on-the-spot operation, the efficiency of various different plane No. is mostly at about 70-75%.Far below the efficiency standard of 85% of national departments concerned proposition.
Cause the reason of inefficiency to mainly contain two aspects, one, in main frame, motor is arranged in cylindrical shell, and motor housing and silencing plate inner core form ring runner.Because the shell of motor and the diameter of impeller hub have certain difference, motor housing will be less than the length of flow blower casing cylindrical shell, and like this, in runner, air-flow is just obstructed, and eddy current loss is larger.Its two, in order to form a ring runner the same with main frame, premuffler and rear noise elimination diffusion barrel all devise inner core, but inner core is all straight tube structure, and the ring runner area along the whole length of premuffler is equally large, and gas-flow resistance is also larger.
In addition, slip ring and premuffler processing and fabricating respectively, and then assemble, processing technology is complicated.
Summary of the invention
The object of this invention is to provide a kind of high-efficient low-noise propeller fan, by structural improvement, provide a kind of efficiency more than 85%, noise is lower than the high-efficient low-noise propeller fan of 85d (B) A (realizing two 85).
The technical solution adopted for the present invention to solve the technical problems is: it comprises main frame 2 and two ends connect radial ringed air inlet/outlet silencer 1 and noise elimination diffusion barrel 4 respectively, described main frame 2 comprises the shell 209 of band noise elimination structure, shell 209 and motor housing 215 form annular air-flow path, flange arrangement is had inside motor housing 215, the front and rear cover of fixed electrical machinery and Flange joint, bearing 203 is provided with in end cap, rotor and axle 201 are supported in electric machine casing 215 by bearing 203, electric machine casing 215 inwall is provided with width and carrys out support stator 205 to gusset or sector unit, motor shaft 201 is provided with impeller 214 after stretching out motor front end cover 216, the external diameter of electric machine casing 215 and impeller 216 hub diameter and consistent with the inner diameter of steel flue of front and back silencing apparatus, electric machine casing 215 two ends are substantially concordant with host housing end, inside the flange of fixed rotor and end cap built-in motor housing 215.
When the hub diameter of impeller changes arbitrarily, electric machine casing 215 external diameter is consistent with hub diameter all the time, the internal diameter size of electric machine casing supporting stator 205, is adjusted by the width that the is arranged on inwall height to gusset or sector unit.
Electric machine casing 215 one end is substantially concordant with host housing end, the other end is connected with impeller hub, a little gap is left in its joint, the other end of wheel hub is substantially concordant with host housing end, the inner side of flange at housing cylinder of end cap is fixed before and after motor, adjust the axial distance of two fastening flanges, adapt to the length requirement installing stator.
Described radial ringed air inlet/outlet silencer 1 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 from radial ringed rounding off to the air-flow path of axial annular, and forms circular air inlet mouth between noise elimination cone cylinder and diversion disk outside, and noise elimination cone cylinder and interior noise elimination is outside bored between cylinder and formed annular exhaust outlet.
Described diversion disk is formed by being enclosed by front shrouding 101, straight barrel 102 and front flow guiding plate 103, is filled with muffler material in diversion disk internal cavities; Described outer noise elimination cone cylinder is enclosed by rear guide plate 105, outer noise elimination conic tube 106 and casing cylinder 108 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 107 and rear shrouding 111 and forms, and is filled with muffler material in interior noise elimination cone cylinder internal cavities; Front flow guiding plate 103 and rear guide plate 105 are circular arc tray type structure, and the small end of front flow guiding plate 103 is connected with interior noise elimination conic tube 107 rounding off, and the small end of rear guide plate 105 is connected with outer noise elimination conic tube 106 rounding off.Front flow guiding plate 103, rear guide plate 105, interior noise elimination conic tube, outer noise elimination cone cylinder adopt orifice plate to process.
Described annular inlets and putlets of ventilation position is radial or axially, at the inlets and putlets of ventilation of runner, be provided with spacing grid type protective net 112, described air-flow path has more than one bend.
Also above the inlets and putlets of ventilation of runner, can support an annular silencing pot 113, form axial inlets and putlets of ventilation in both sides by round steel 104 or support band steel 110, axial inlets and putlets of ventilation place, both sides is provided with spacing grid type protective net 112.
Being provided with silencing plate in described shell 209, is damping sound-deadening layer 210, air layer 218, microwell plate silencing plate 211, glass wool silencing plate 212 and punched-plate inner core 213 from outside to inside successively.
Described noise elimination diffusion barrel 4 inner core arranges growth cone.
The inner side of flange at housing cylinder of end cap is fixed in the front and back of motor.
Described main frame 2 both can be one, also can be more than two series connection.
The invention has the beneficial effects as follows:
1, the housing of motor is that width is built-in to gusset, the supporting surface of composition stator, thus, ensure external diameter and the impeller hub diameter of housing and consistent with the inner diameter of steel flue of front and back silencing apparatus.At length direction, electric machine casing afterbody is substantially concordant with main frame outer cylinder body end.The inner side of flange at housing cylinder of end cap is fixed in the front and back of motor.This structure, motor housing surface is smooth, and the flange flange of fixed electrical machinery end cap is not in runner, and the resistance of gas will lack.
2, the barrel designs of main frame become and to be combined muffler body by multiple noise elimination mechanism, the thickness of whole muffler body increases, and reduces noise by barrel wall to external radiation.Different noise elimination mechanism synergies, the noise of centering, high and low frequency can play the effect of noise reduction.
3, by the inner core of front and back silencing apparatus design growth cone, and enter the slip ring or diffuser and muffler desing integralization structure that (going out) wind silencing apparatus is connected, make runner be gradually expansion type or tapering type structure.The Front-end Design entering (going out) wind direction becomes diversion disk, stops noise in axial direction rectilinear propagation on the one hand, on the other hand, guide air-flow to enter in runner from radial direction, like this, the path of propagation of noise is changed, the flow channel length that noise passes through also increases, and noise is reduced.
4, the present invention is by improving the main frame of axial-flow blower and acoustic wave filter structure, and efficiency reaches 85% substantially, and noise is lower than 85dB (A).Meanwhile, appearance also improves.
Accompanying drawing explanation
Fig. 1 is forward structure cross-sectional schematic of the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is the forward structure schematic diagram of main frame of the present invention.
The forward sectional structure schematic diagram of Fig. 4 main frame muffler body.
Fig. 5 is the C-C sectional structure schematic diagram of Fig. 4.
Fig. 6 is the structural representation of electric machine casing of the present invention.
Fig. 7 is the B-B sectional structure schematic diagram of Fig. 4.
Fig. 8 is the another kind of structural representation that the B-B of Fig. 4 analyses and observe.
Fig. 9 be radial ringed enter the forward sectional structure schematic diagram () of (going out) wind silencer.
Figure 10 be Fig. 9 form structure schematic diagram.
Figure 11 be radial ringed enter the forward sectional structure schematic diagram (two) of (going out) wind silencer.
Figure 12 be radial ringed enter the forward sectional structure schematic diagram (three) of (going out) wind silencer.
Figure 13 be radial ringed enter the forward sectional structure schematic diagram (four) of (going out) wind silencer.
In figure: the radial ringed silencer of 1-, shrouding before 101-, 102-straight barrel, 103-front flow guiding plate, 104-round steel, guide plate after 105-, 106-eliminates the noise outward conic tube, noise elimination conic tube in 107-, 108-casing cylinder, 109-flange, 110-supports band steel, shrouding after 111-, 112-protective net, 113-annular silencing pot, 2-main frame, 201-motor shaft, 202-back end cover for motor, 203-bearing, 204-rotor, 205-stator, 206-locking nut, 207-outlet-pipe, 208-terminal box, 209-shell, 210-damping sound-deadening layer, 211-microwell plate silencing plate, 212-glass wool silencing plate, 213-punched-plate inner core, 214-impeller, 215-electric machine casing, 216-motor front end cover, 217-supports former, air layer 218, 3-adpting flange, 4-noise elimination diffusion barrel.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further details.
Embodiment 1, as Fig. 1, the present invention includes radial ringed air inlet/outlet silencer 1 and noise elimination diffusion barrel 4 that main frame 2 and two ends connect respectively.Described main frame 2 comprises the shell 209 of band noise elimination structure, forms air flow channel with motor housing 215.Electric machine casing 215 inwall arranges width and carrys out support stator 205 to gusset or sector unit, by adjusting the height of built-in width to gusset or sector unit, make it to match with stator diameter, thus, ensure external diameter and impeller 216 hub diameter of electric machine casing 215 and consistent all the time with the inner diameter of steel flue of front and back silencing apparatus, one end of electric machine casing 215 is substantially concordant with host housing end, after opposite side is connected with impeller, hub width is also concordant with host housing end, meanwhile, the flange of fixed rotor and end cap are arranged inside electric machine casing 215.Air intake runner is become tapering type and gradually expansion type structure with air-out runner design, optimizing flow passage, the eddy current loss that gap between minimizing main frame and between main frame and front and back silencing apparatus and radial error produce, thus, reach the object improving aeroperformance and efficiency, in addition, the host shell noise elimination structure of the silencer of radial ringed air intake (air-out) and the combination of multimachine reason is adopted to reach the object of noise reduction.Prove through using, this mode of structure can reach the performance requirement of " two 85 " axial-flow blower that country proposes.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, Placement and the function of each parts are same as described above.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, and the external diameter diameter of electric machine casing is consistent with impeller hub diameter, the runner of this structure, match with gas dynamics, air resistance is minimum, thus reaches the object of raising the efficiency.Air-flow is not axially enter (going out) runner, but by the guiding of front diversion disk and rear diversion disk, radial ringed enter (going out) runner.The noise of blower fan is not directly blaze abroad from runner, but by stopping, rolling over (instead) be again shot out by the muffler body on front diversion disk after being absorbed noise reduction, like this, just significantly reduces at the noise entering (going out) air port.
Fig. 2 is the appearance forrns of high-efficient low-noise counter-rotating axial fan of the present invention, radial ringed enter (going out) wind position, adopt mesh grille air port is surrounded annular, prevent foreign matter from entering runner.In addition, the axial-flow blower outward appearance with common is substantially identical.
Fig. 3 is axial-flow blower main machine structure of the present invention, main frame it be made up of motor and shell two large divisions, the part of motor housing support stator, adopt built-in width to gusset or sector unit, like this, the external diameter of electric machine casing just can be designed to consistent with the inner diameter of steel flue of impeller hub diameter and front and back silencing apparatus, and electric machine casing tail end is substantially concordant with main frame outer cylinder body end.The inner side of flange at housing cylinder of end cap is fixed in the front and back of motor.Thus, make the stop of the inner foreign of the runner of host machine part, ensure that air-flow is unobstructed logical.
Fig. 4, Fig. 5 are the muffler body structures of axial-flow blower main frame of the present invention, adopt punched-plate, noise elimination cotton, microwell plate, air layer, damping layer and shell etc. to have the material of different noise elimination mechanism, with concentric circle successively layered arrangement in cylindrical shell.Fill muffler material for convenience, whole main frame cylindrical shell is designed to split type structure.Host machine part adopts the composite sound damping structure of multimachine reason, and than adopting single muffler material, soundproof effect increases significantly, thus, reduce the noise that the outside width of host machine part is penetrated, have certain noise reduction to the noise of different frequency.
Fig. 6, Fig. 7 and Fig. 8 are the structures of motor housing, shell is smooth surface towards the side of runner, the part of shell support stator, that more than one built-in width is to gusset or more than one sector unit, width is to the height of gusset or sector unit, can change arbitrarily as required, thus ensure external diameter and the impeller hub diameter of electric machine casing and consistent with the inner diameter of steel flue of front and back silencing apparatus.
Fig. 9 to Figure 10, be radial ringed enter the internal structure of (going out) wind silencer and profile.By adopt radial ringed enter (going out) wind mode, adopt disc type noise elimination structure in blower fan air intake front end, disk noise elimination structure is a sound absorbent, has certain assimilation effect to the noise that runner is outwards propagated; Meanwhile, its arcuate surface has guide functions to air-flow again, and air-flow can be guided to enter (going out) axial annular passage from radial ringed passage.In addition, disc type sound absorption structure, forms the structure of relative closure with silencing apparatus outer cylinder body, has certain sound insulation effect.Thisly have sound absorption concurrently, eliminate the noise, the structure of sound insulation, to the rectilinear propagation vertically of minimizing noise, have very important effect.
Embodiment 2, Figure 10 to Figure 13, embody radial ringed enter the different internal structure of (going out) wind silencer, 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; Radial ringed enter (going out) mouth can be arranged on radial direction or 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.Can also radial ringed enter outside (going out) air port, increase an annular noise elimination structure of band, runner relative closure, after making pneumatic noise and once stopping with annular silencing pot is many, then enter (going out) at axial direction, absorb sound, noise elimination, the better effects if that insulates against sound.But, entering (going out) distinguished and admirable road, still to have area be convergent (expansion) formula, geometrical shape radially annular garden cunning is transitioned into axial structural feature, like this, air intake has both direction, 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 are with embodiment 1.
Claims (9)
1. a high-efficient low-noise propeller fan, it is characterized in that: it comprise main frame (2) and two ends connect respectively radial ringed enter (going out) wind silencer (1) and noise elimination diffusion barrel (4), described main frame (2) comprises the shell (209) of band noise elimination structure, shell (209) and motor housing (215) form annular air-flow path, there is flange arrangement motor housing (215) inner side, the front and rear cover of fixed electrical machinery and Flange joint, bearing (203) is provided with in end cap, rotor and axle (201) are supported in electric machine casing (215) by bearing (203), electric machine casing (215) inwall is provided with width and carrys out support stator (205) to gusset or sector unit, motor shaft (201) is provided with impeller (214) after stretching out motor front end cover (216), the external diameter of electric machine casing (215) and impeller (216) hub diameter and consistent with the inner diameter of steel flue of front and back silencing apparatus, electric machine casing (215) two ends are substantially concordant with host housing end, the flange of fixed rotor and end cap built-in motor housing (215) inner side.
2. high-efficient low-noise propeller fan according to claim 1, it is characterized in that: when the hub diameter of impeller changes arbitrarily, electric machine casing (215) external diameter is consistent with hub diameter all the time, the internal diameter size of electric machine casing supporting stator (205), is adjusted by the width that the is arranged on inwall height to gusset or sector unit.
3. high-efficient low-noise propeller fan according to claim 1, it is characterized in that: electric machine casing (215) one end is substantially concordant with host housing end, the other end is connected with impeller hub, a little gap is left in its joint, the other end of wheel hub is substantially concordant with host housing end, fix the inner side of flange at housing cylinder of end cap before and after motor, adjust the axial distance of two fastening flanges, adapt to the length requirement installing stator.
4. high-efficient low-noise propeller fan according to claim 1, it is characterized in that: described radial ringed enter (going out) wind silencer (1) comprise 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 forming circular air inlet mouth between noise elimination cone cylinder and diversion disk outside, noise elimination cone cylinder and interior noise elimination is outside bored between cylinder and is formed annular exhaust outlet.
5. high-efficient low-noise propeller fan according to claim 4, is characterized in that: described diversion disk is formed by being enclosed by front shrouding (101), straight barrel (102) and front flow guiding plate (103), is filled with muffler material in diversion disk internal cavities; Described outer noise elimination cone cylinder is enclosed by rear guide plate (105), outer noise elimination conic tube (106) and casing cylinder (108) 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 (107) and rear shrouding (111) and forms, and is filled with muffler material in interior noise elimination cone cylinder internal cavities; Front flow guiding plate (103) and rear guide plate (105) are circular arc tray type structure, and the small end of front flow guiding plate (103) is connected with interior noise elimination conic tube (107) rounding off, and the small end of rear guide plate (105) is connected with outer noise elimination conic tube (106) rounding off.
6. high-efficient low-noise propeller fan according to claim 4, it is characterized in that: described annular is entered (going out), and tuyere position is radial direction or axial, enter (going out) air port at runner, be provided with spacing grid type protective net (112), described air-flow path has more than one bend.
7. high-efficient low-noise propeller fan according to claim 4, it is characterized in that: also can enter above (going out) air port at runner, an annular silencing pot (113) is supported by round steel (104) or support band steel (110), 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 (112).
8. high-efficient low-noise propeller fan according to claim 1, it is characterized in that: described shell is provided with silencing plate in (209), is damping sound-deadening layer (210), air layer (218), microwell plate silencing plate (211), glass wool silencing plate (212) and punched-plate inner core (213) from outside to inside successively.
9. high-efficient low-noise propeller fan according to claim 1, is characterized in that: described noise elimination diffusion barrel (4) inner core arranges growth cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410822340.2A CN104632714A (en) | 2014-12-26 | 2014-12-26 | High-efficiency low-noise axial flow fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410822340.2A CN104632714A (en) | 2014-12-26 | 2014-12-26 | High-efficiency low-noise axial flow fan |
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| CN104632714A true CN104632714A (en) | 2015-05-20 |
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|---|---|---|---|
| CN201410822340.2A Pending CN104632714A (en) | 2014-12-26 | 2014-12-26 | High-efficiency low-noise axial flow fan |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486108A (en) * | 2016-12-13 | 2017-03-08 | 长沙奥邦环保实业有限公司 | Vortex type silencer |
| CN107524617A (en) * | 2017-08-24 | 2017-12-29 | 南通迪瓦特节能风机有限公司 | The cold axial flow blower of noise reduction ring |
| CN109404346A (en) * | 2018-12-20 | 2019-03-01 | 卧龙电气南阳防爆集团股份有限公司 | A kind of low noise quo of local Fan for Mine |
| CN109707645A (en) * | 2019-02-27 | 2019-05-03 | 平安电气股份有限公司 | A kind of Coal Mine Axial Flow Fan of hydraulic-driven |
| CN110219813A (en) * | 2019-04-28 | 2019-09-10 | 山西尚风科技股份有限公司 | A kind of ventilation duct power device |
| CN112377431A (en) * | 2020-11-30 | 2021-02-19 | 平安电气股份有限公司 | Ultra-low noise high-efficiency axial flow fan |
| CN112628216A (en) * | 2020-12-31 | 2021-04-09 | 江苏源憬环保科技有限公司 | High pressure positive blower silencer and control system thereof |
| 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 CN201410822340.2A patent/CN104632714A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486108A (en) * | 2016-12-13 | 2017-03-08 | 长沙奥邦环保实业有限公司 | Vortex type silencer |
| CN107524617A (en) * | 2017-08-24 | 2017-12-29 | 南通迪瓦特节能风机有限公司 | The cold axial flow blower of noise reduction ring |
| CN107524617B (en) * | 2017-08-24 | 2019-08-23 | 南通迪瓦特节能风机有限公司 | The cold axial flow blower of noise reduction ring |
| CN109404346A (en) * | 2018-12-20 | 2019-03-01 | 卧龙电气南阳防爆集团股份有限公司 | A kind of low noise quo of local Fan for Mine |
| CN109707645A (en) * | 2019-02-27 | 2019-05-03 | 平安电气股份有限公司 | A kind of Coal Mine Axial Flow Fan of hydraulic-driven |
| CN110219813A (en) * | 2019-04-28 | 2019-09-10 | 山西尚风科技股份有限公司 | A kind of ventilation duct power device |
| CN112377431A (en) * | 2020-11-30 | 2021-02-19 | 平安电气股份有限公司 | Ultra-low noise high-efficiency axial flow fan |
| CN112628216A (en) * | 2020-12-31 | 2021-04-09 | 江苏源憬环保科技有限公司 | High pressure positive blower silencer and control system thereof |
| 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: 20150520 |