CN1019523B - Low-noise centrifugal fan - Google Patents
Low-noise centrifugal fanInfo
- Publication number
- CN1019523B CN1019523B CN 90101052 CN90101052A CN1019523B CN 1019523 B CN1019523 B CN 1019523B CN 90101052 CN90101052 CN 90101052 CN 90101052 A CN90101052 A CN 90101052A CN 1019523 B CN1019523 B CN 1019523B
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- China
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- noise
- group
- noise elimination
- centrifugal fan
- plate
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Abstract
The present invention relates to a low noise centrifugal fan which belongs to a pneumatic device, comprising an external connection mechanism, a noise elimination throttling assembly, a noise elimination flow guiding assembly, a wind regulating mechanism, a connecting assembly, a machine casing, an impeller, an electrical machine and a wind inlet assembly. The structure design that an air flowing inlet channel is composed of two corners, and a sound-proof chamber and the external connection mechanism are arranged on the machine casing is adopted. A centrifugal fan with the advantages of good noise-reducing and anechoic effect, small size, light weight, flexibly adjusted air quantity, and the performances of an air cylinder, a pipeline and a filter device which are connected in an extended way is provided. The objective conditions for noise elimination of the centrifugal fan can be further improved and the purpose of greatly decreasing the noise of the whole centrifugal fan can be realized.
Description
A kind of low-noise centrifugal fan that is provided with noise reduction noise elimination, adjusting air quantity mechanism.
At present, the blower fan product of affiliated blower fan technical field all is that suction port opens wide basically, and fan noise is big, and directly diffusion propagates into surrounding space, causes noise pollution.Blower fan transfers wind to adopt the stepping of register throttling to transfer the wind mode more, and this accent wind mode also can produce noise because of louver except that uneconomical.Application number 87208106 disclosed low noise gas fans, though be provided with at the air intake position and comprise air inlet disk, adjustable sound absorption disk, louver, utilize its bigger sound absorption area and long air intake runner, reduce gas air intake flow velocity, reduce eddy current and eddy current crack, but reducing under the suitable condition of noise effects, because big sound absorption area and long air intake runner make it must have bigger volume and weight.Because louver is located at the outer rim of corresponding air inlet disk and adjustable sound absorption disk, has limited the extension performance of blower fan at the air intake position.The structure of this application between draught fan impeller and casing do not change, thus a large amount of noise that produces between impeller and the snail tongue do not have controlled, so it is also unsatisfactory to embody the noise reduction of complete machine.
The purpose of low-noise centrifugal fan is to overcome the defective and the deficiency of above-mentioned blower fan, take by two turnings constitute by axially to radially again to axial annular space air intake runner and the sound insulation chamber is set on casing and outside connect the structure of mechanism, provide a kind of volume with good noise reduction noise elimination effect little, in light weight be convenient to the free adjusting air quantity and have the low-noise centrifugal fan that extension is connected air duct, pipeline, filtrating equipment performance, the objective condition that makes blower fan eliminate noise is further improved, and realizes reducing significantly the purpose of complete blower noise eventually.
The object of the present invention is achieved like this: a kind of low-noise centrifugal fan, comprise the casing of being with volute casing, be arranged on the interior impeller of this casing and be fixed on the motor that this its spindle nose of casing one end is connected with impeller, the suction side of this blower fan is provided with by the air intake group, noise elimination water conservancy diversion group, noise elimination throttling group and the sound-absorbing and noise-decreasing device of transferring wind mechanism to form; Wherein air intake group one end communicates with the import of impeller, the air inlet runner that constitutes between the other end and noise elimination water conservancy diversion group and noise elimination throttling group communicates, by the circulation area of transferring wind mechanism can regulate air inlet runner, described noise elimination throttling group is arranged in the space that described noise elimination water conservancy diversion group inwall contained, thereby form by axially to radially, by radially to axial air inlet runner, described volute casing is provided with the sound insulation chamber that is made of spiral case plate and snail hyoplastron again.Guarantee the ideal effect of sound source noise reduction with said structure.
Fig. 1, low-noise centrifugal fan structural drawing
Fig. 2, low-noise centrifugal fan casing structure figure
Fig. 3, low-noise centrifugal fan noise elimination throttling group structural drawing
Fig. 4, low-noise centrifugal fan noise elimination water conservancy diversion group structural drawing
Fig. 5, low-noise centrifugal fan connection group structural drawing
Fig. 6, low-noise centrifugal fan adjustable lever structural drawing
Describe in detail below in conjunction with accompanying drawing: such as Fig. 1, low-noise centrifugal fan is made up of outer mechanism 2, noise elimination throttling group 3, noise elimination water conservancy diversion group 4, air adjustment actuator 5, connection group 6, shell 7, impeller 8, motor 9 and the air intake group 10 of connecting. Noise elimination water conservancy diversion group 4 respectively be connected group 6 and be connected connection with casing. Air intake group 10 respectively be connected group 6 and be connected connection with casing. Noise elimination throttling group 3 is passed through adjusting rod 39, the screwed pipe 36 of air adjustment actuator 5 and is connected group 6 to connect. The collar extension end face of noise elimination water conservancy diversion group 4 is provided with the outer mechanism 2 that connects. Motor 9 be connected with an end of casing 7 and in casing the spindle nose of motor 9 connect impeller 8. Such as Fig. 2, casing 7 consists of housing by side plate and spiral case plate 12, air outlet 11, the sound insulation chamber 14 that is made up of spiral case plate 12 and snail hyoplastron 13 is set to casing inner flow passage 1/4～1/3 place in air outlet 11 tops, and snail hyoplastron 13 is connected with air outlet 11, spiral case plate 12 and side plate respectively. Such as Fig. 3, noise elimination throttling group 3 is by U-shaped circle 15 connecting lateral plates 19 and acoustic board 18 and the cone 20 of eliminating the noise. Symmetrical and splicing sleeve 17, positioning sleeve 16 be set respectively on same axis on side plate 19 and the acoustic board 18. Filling sucting sound material 22 in its cavity, acoustic board 18 and the configuration armour layer 21 between cone 20 inwalls and the sound-absorbing material 22 of eliminating the noise. Acoustic board 18, the cone 20 of eliminating the noise are orifice plate or net. Such as Fig. 4, noise elimination water conservancy diversion group 4 connects cone circle acoustic board 29 by reinforcement 25, and then connects acoustic board 30, and flange 26 connects side plate and the coaming plate 32 of casing 7. Collar extension end face in noise elimination water conservancy diversion group 4 is provided with the outer mechanism 2 that connects that is made up of flange 31 and nut, and this mechanism connects acoustic board 30 and coaming plate 32 forms connector. The connector internal cavities is filled with sound-absorbing material 27, and disposes armour layer 28 between the inwall of sound-absorbing material 27 and cone circle acoustic board 29 and acoustic board 30. Cone circle acoustic board 29 is orifice plate or net with acoustic board 30. Such as Fig. 5, the connecting plate 35 of connection group 6 is annular slab, and be provided with the throttling group 3 of eliminating the noise on the splicing sleeve 17, positioning sleeve 16 of configuration at the screwed pipe 36 of same axis. One end of screwed pipe 36 is connected with hush panel 37. Such as Fig. 6, adjusting rod 39 is made of bigger diameter end, pin-and-hole 40 and the screw rod 41 with polygon counterbore 38.
Embodiment: motor 9 can directly be connected with a distolateral plate of casing 7, and connects impeller 8 at spindle nose.Noise elimination water conservancy diversion group 4 respectively be connected group 6, casing 7 and connect.Air intake group 10 respectively be connected group 6, casing 7 and connect.It is fixed that noise elimination throttling group 3 is passed supporting sleeve 17, setting sleeve 16 and passed through pin-and-hole 40 pins with pin, packing ring by adjustable lever 39, utilizes then and transfer wind rocking the 1 screw rod 41 screw-in screwed pipes 36 with adjustable lever 39.Transfer wind mechanism 5 symmetries uniform, thereby finish the formation of whole typhoon machine.Wherein the accent wind mechanism 5 of adjustable lever 39, screwed pipe 36, supporting sleeve 17, setting sleeve 16 compositions can be more than two covers.The outer rim section of U-shaped circle 15 is curve U shapes, also can be the U-shaped of broken line, also can be other arbitrary curve.It is that real plate also can be orifice plate or fine groove net.The air intake runner of being made up of noise elimination throttling group 3 and noise elimination water conservancy diversion group 4 is opening vertically, and its inner surface contour line can be that broken line constitutes also can be to be made of curve, and its runner is the ring runner at two turnings.The radial structure shape of noise elimination throttling group 3 and noise elimination water conservancy diversion group 4 can be that circle also can be polygonal.Connect mechanism's 2 symmetries outward and be distributed on the noise elimination water conservancy diversion group 4 collar extension end faces, it can connect air duct, pipeline and filtrating equipment etc. arbitrarily.Utilize and transfer wind rocking can make noise elimination throttling group 3 along intake grill axis advance and retreat, thereby adjust the air intake venturi, realize the purpose of stepless accent wind 1.Snail hyoplastron 13 can be that real plate also can be an orifice plate, and the sound insulation chamber 14 that is made of snail hyoplastron 13 and spiral case plate 12 can be a cavity, also can filling sucting sound material and configuration armour layer.Above-described sound-absorbing material can be glass wool or other fiber or expandable plastic.The material of above-described all formation housings can be steel plate or engineering plastics.Its Placement can be riveted, be threaded and Placement such as welding.
The noise elimination throttling group 3 of low-noise centrifugal fan, the structural design of noise elimination water conservancy diversion group 4, the air intake runner is made of two turnings, and noise energy produces than high attenuation in this runner, thereby increases noise reduction.Because the setting at the initial turning of air intake has reduced the blower fan radial dimension, therefore reduced the volume and weight of whole blower fan.Simultaneously spiral case plate 12 and the sound insulation chamber 14 that snail hyoplastron 13 constitutes are shielded the noise of this important noise origination point of snail tongue position and absorb, and make this blower fan embody on the whole and have low noise characteristics.
Claims (8)
1, a kind of low-noise centrifugal fan, comprise the casing (7) of being with volute casing, be arranged on the interior impeller (8) of this casing and be fixed on the motor (9) that these casing (7) one its spindle noses of end are connected with impeller (8), the suction side of this blower fan is provided with by air intake group (10), noise elimination water conservancy diversion group (4), noise elimination throttling group (3) and the sound-absorbing and noise-decreasing device of transferring wind mechanism to form, wherein air intake group (10) one ends communicate with the import of impeller (8), the air inlet runner that constitutes between the other end and noise elimination water conservancy diversion group (4) and noise elimination throttling group (3) communicates, by the circulation area of transferring wind mechanism can regulate air inlet runner, it is characterized in that: described noise elimination throttling group (3) is arranged in described noise elimination water conservancy diversion group (4) space that inwall contained, thereby form by axially to radially, by radially to axial air inlet runner, described volute casing is provided with the sound insulation chamber (14) that is made of spiral case plate (12) and snail hyoplastron (13) again.
2, low-noise centrifugal fan according to claim 1, it is characterized in that: noise elimination throttling group (3) connects side plate (19) and acoustic board (18) and the awl (20) of eliminating the noise by U-shaped circle (15), side plate (19) and acoustic board (18) are gone up symmetry and supporting sleeve (17) are set respectively on same axis, setting sleeve (16), filling sucting sound material (22) in noise elimination throttling group (3) cavity, dispose armour layer (21), the acoustic board (18) of noise elimination throttling group (3) between sound-absorbing material (22) and acoustic board (18) and noise elimination awl (20) inwall, the awl (20) of eliminating the noise is orifice plate or fine groove net.
3, low-noise centrifugal fan according to claim 1, it is characterized in that: noise elimination water conservancy diversion group (4) connects awl circle acoustic board (29) by stiffening rib (25), and then connection acoustic board (30), flange (26) connects the side plate and the coaming plate (32) of casing (7), its collar extension end face is provided with the outer mechanism (2) that connects, this mechanism connects acoustic board (30) and coaming plate (32) forms connecting body, filling sucting sound material (27) in the connecting body cavity, and between the inwall of sound-absorbing material (27) and awl circle acoustic board (29) and acoustic board (30), disposing armour layer (28), the awl circle acoustic board (29) of noise elimination water conservancy diversion group (4) is orifice plate or fine groove net with acoustic board (30).
4, low-noise centrifugal fan according to claim 1 is characterized in that: connect mechanism (2) outward and be made up of flange (31), nut, and symmetry is distributed on noise elimination water conservancy diversion group (4) the collar extension end face.
5, low-noise centrifugal fan according to claim 1, it is characterized in that: the connecting plate (35) of connection group (6) is an annular slab, and be provided with and the throttling group (3) of eliminating the noise goes up the supporting sleeve (17), setting sleeve (16) of the configuration screwed pipe (36) at same axis, an end of screwed pipe (36) is connected with hush panel (37).
6, low-noise centrifugal fan according to claim 1 and 2 is characterized in that: the U-shaped circle (15) of noise elimination throttling group (3) is real plate or orifice plate or fine groove net, and its outer rim section is curvilinerar figure or broken line shape.
7, low-noise centrifugal fan according to claim 1, it is characterized in that: casing (7) is by side plate and spiral case plate (12), exhaust outlet (11) constitutes housing, exhaust outlet (11) top to casing inner flow passage 1/4～1/3 place is provided with the sound insulation chamber (14) that is made of spiral case plate (12) and snail hyoplastron (13), snail hyoplastron (13) respectively with exhaust outlet (11), spiral case plate (12) and side plate connect, the snail hyoplastron (13) of casing (7) is real plate or orifice plate, and snail hyoplastron (13) is cavity or filling sucting sound material and armour layer is set with the sound insulation chamber (14) that spiral case plate (12) constitutes.
8, low-noise centrifugal fan according to claim 1, it is characterized in that: transfer the adjustable lever (39) that has polygonal counterbore (38), pin-and-hole (40), screw rod (41) of wind mechanism (5) to pass supporting sleeve (17), setting sleeve (16), and in pin-and-hole (40) pin calmly with pin, packing ring, screw rod (41) screws in screwed pipe (36), transfer the symmetrical uniform setting of wind mechanism (5), quantity is more than two covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101052 CN1019523B (en) | 1990-03-07 | 1990-03-07 | Low-noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101052 CN1019523B (en) | 1990-03-07 | 1990-03-07 | Low-noise centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1054651A CN1054651A (en) | 1991-09-18 |
| CN1019523B true CN1019523B (en) | 1992-12-16 |
Family
ID=4876920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101052 Expired CN1019523B (en) | 1990-03-07 | 1990-03-07 | Low-noise centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019523B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416110C (en) * | 2002-07-02 | 2008-09-03 | 科梅弗里股份公司 | Stabilizer for noise-proof and vortex-proof |
-
1990
- 1990-03-07 CN CN 90101052 patent/CN1019523B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100416110C (en) * | 2002-07-02 | 2008-09-03 | 科梅弗里股份公司 | Stabilizer for noise-proof and vortex-proof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1054651A (en) | 1991-09-18 |
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