CN221322825U - Series low-noise centrifugal fan impeller - Google Patents
Series low-noise centrifugal fan impeller Download PDFInfo
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- CN221322825U CN221322825U CN202322825370.6U CN202322825370U CN221322825U CN 221322825 U CN221322825 U CN 221322825U CN 202322825370 U CN202322825370 U CN 202322825370U CN 221322825 U CN221322825 U CN 221322825U
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- 238000010521 absorption reaction Methods 0.000 description 6
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- 239000012814 acoustic material Substances 0.000 description 1
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Abstract
The utility model discloses a serial low-noise centrifugal fan impeller, which comprises an outer impeller set, an inner impeller set coaxial with the outer impeller set, a sound absorbing part arranged between the outer impeller set and the inner impeller set, a fixing screw, a fixing screen plate arranged on the sound absorbing part and fixed through the fixing screw, noise reduction blades forming the inner impeller set and the outer impeller set and a connecting ring arranged at the top of the outer impeller set, wherein the noise reduction blades are arranged on the inner impeller set and the outer impeller set; the sound absorbing part is connected with the bottom connecting disc, the top is provided with the fixed screen plate, the fixed screen plate is fixed through the fixed screw, the size of fixed screen plate and the space adaptation between inside and outside impeller group through the combined application to fixed screen plate and fixed screw, for the sound absorbing part provides a stable and firm bearing structure, the sound absorbing part is filled with sound absorbing material for absorb the inside noise of spiral case, reach the effect of making an uproar of falling.
Description
Technical Field
The embodiment of the utility model belongs to the technical field of fan noise reduction, and particularly relates to a serial low-noise centrifugal fan impeller.
Background
Centrifugal fan impellers are the core components in centrifugal fans that play the role of drawing and accelerating gas to high speeds. These gases are then pushed into the outlet of the fan, so that the gases acquire a large kinetic energy, which in turn pushes the gases out of the outlet of the fan, and centrifugal fan impellers play an important role in many fields. Chinese patent CN202020698693.7 discloses a centrifugal fan impeller, a centrifugal fan and an air purifier, wherein the impeller seat is arranged, and the left impeller and the right impeller which are fixedly arranged at two sides of the impeller seat, namely, two sets of blades are connected in parallel to realize the increase of the air quantity of the fan, but there are still some problems, such as inconsistent size, number of blades and blade shape of the left impeller and the right impeller, inconsistent flow and pressure at the outer edge of the blade set, internal circulation occurs in the volute, the vortex quantity is increased, the efficiency is reduced and the control of vibration and noise is not facilitated.
Disclosure of utility model
In order to meet the above defects or improvement demands of the prior art, the utility model provides a serial low-noise centrifugal fan impeller, an inner impeller set and an outer impeller set are fixed through a bottom connecting disc, the inner impeller set and the outer impeller set are coaxially connected in series, the inner impeller set is used for improving the air inlet efficiency of the outer impeller set, meanwhile, through precompression of air flow in the inner impeller set, the air flow entering the outer impeller set is more uniform, the air compressing effect of the outer impeller set is further improved, so that the air volume of the fan is increased, and due to the coaxial serial design of the inner impeller set and the outer impeller set, a large enough low-pressure area is formed in the central area of the impeller during rotation of the inner impeller set, so that the vortex intensity of an impeller inlet is reduced, the inner impeller set sucks external air in and feeds the external impeller set in an accelerating manner, the air inlet efficiency of the external impeller set is improved, and further the power consumption of the fan is reduced.
In order to achieve the above-mentioned purpose, the present utility model provides a serial low noise centrifugal fan impeller, comprising an outer impeller set, an inner impeller set coaxial with the outer impeller set, a sound absorbing part arranged between the outer impeller set and the inner impeller set, a fixing screw, a fixing screen plate arranged on the sound absorbing part and fixed by the fixing screw, noise reduction blades forming the inner impeller set and the outer impeller set, and a connecting ring arranged at the top of the outer impeller set; wherein,
The sound absorption part bottom with the end connection pad is connected, and the top is provided with fixed otter board, fixed otter board passes through the fixed screw to be fixed, the size of fixed otter board and the space adaptation between the inside and outside impeller group are through the combined application to fixed otter board and fixed screw, provide a stable and firm bearing structure for sound absorption part.
Further, the outer impeller groups are circumferentially arrayed at equal intervals on the outer edge of the bottom connecting disc;
The outer impeller set includes a plurality of noise reduction blades.
Further, the inner impeller set is located inside the outer impeller set, and the inner impeller set and the outer impeller set are arranged in series.
Further, the bottom of the blade of the inner impeller set is provided with a notch, and the two ends of the top and bottom of the blade of the outer impeller set are provided with notches.
Furthermore, the noise reduction blades of the inner impeller set and the outer impeller set are respectively provided with stepped protrusions at the back parts.
Further, the inner impeller set of blades is shorter than the outer impeller set.
Further, the sound absorbing portion is filled with a sound absorbing material.
Further, the fixed screen plate is provided with a punching hole.
Further, the bottom connecting disc is in a shape of gradually rising around the central area and is used for accommodating noise reduction blades with different specifications.
Further, the device also comprises a shaft hole, and the inner impeller set and the outer impeller set take the shaft hole as the circle center.
In general, the above technical solutions conceived by the present utility model, compared with the prior art, enable the following beneficial effects to be obtained:
(1) According to the serial low-noise centrifugal fan impeller, the inner impeller set and the outer impeller set are fixed through the bottom connecting disc, the inner impeller set and the outer impeller set are coaxially connected in series, the inner impeller set is used for improving the air inlet efficiency of the outer impeller set, meanwhile, through precompression of air flow in the inner impeller set, the air flow entering the outer impeller set is more uniform, and further the air compression effect of the outer impeller set is improved, so that the air quantity of the fan is increased, and due to the design that the inner impeller set and the outer impeller set are coaxially connected in series, a large enough low-pressure area is formed in the central area of the impeller during rotation of the inner impeller set, so that the vortex intensity of an impeller inlet is reduced, the inner impeller set sucks external air and feeds the external impeller set in an accelerating mode, the air inlet efficiency of the outer impeller set is improved, and further the air inlet efficiency of the fan is reduced, meanwhile, the vortex of the air flow entering the outer impeller set is reduced, the noise of the fan is reduced, and the performance and the efficiency of the fan are improved
(2) According to the serial low-noise centrifugal fan impeller, the sound absorption part is arranged between the inner impeller set and the outer impeller set, so that the sound absorption area and the sound absorption volume in the whole fan cavity are increased, the sound absorption effect on the volute reflection sound is further improved, meanwhile, the vortex in the inner impeller set is peeled off from the outside, the air inlet vortex of the outer impeller set is greatly reduced, and the root of vortex noise is weakened.
(3) According to the serial low-noise centrifugal fan impeller, the fixed screen plate is arranged and fixed on the sound absorbing part through the fixed screws, so that the sound absorbing part can be effectively clamped, loosening and even falling caused by strong vortex effect in the operation process are prevented, meanwhile, the effect of adjusting dynamic balance of the impeller can be achieved by flexibly adjusting the punching diameter and the punching position, and the noise reduction effect and stability are ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a serial low noise centrifugal fan impeller according to an embodiment of the present utility model;
Fig. 2 is a cross-sectional view of a tandem low noise centrifugal fan impeller in accordance with an embodiment of the present utility model.
Like reference numerals denote like technical features throughout the drawings, in particular: 1-outer impeller group, 2-fixed screen plate, 3-inner impeller group, 4-fixed screw, 5-sound absorbing part, 6-bottom connecting disc, 7-noise reduction blade, 8-shaft hole and 9-connecting ring.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
As can be seen from fig. 1-2, the present utility model provides a serial low noise centrifugal fan impeller, which comprises an outer impeller set 1, a shaft hole 8, an inner impeller set 3 coaxial with the outer impeller set 1, a sound absorbing portion 5 arranged between the outer impeller set 1 and the inner impeller set 3, a fixing screw 4, a fixing screen 2 arranged on the sound absorbing portion 5 and fixed by the fixing screw 4, and noise reduction blades 7 forming the inner impeller set 3 and the outer impeller set 1. The impeller of this embodiment has good noise reduction effect, can effectively reduce noise when using, and the portion of inhaling sound 5 can absorb and the isolated noise simultaneously, and fixed otter board 2 and fixed screw 4 can firmly fix the portion of inhaling sound 5, and the combined application of fixed otter board 2 and fixed screw 4 provides a stable and firm bearing structure for inhaling the portion of inhaling 5, makes it can be under various operating condition steady operation, and the blade 7 of making an uproar that falls can further reduce noise, and interior impeller group 3 and outer impeller group 1 are coaxial establish ties for the vortex that two sets of inside and outside impellers produced when rotating offsets each other.
As can be seen from fig. 1, the outer impeller set 1 includes a plurality of noise reduction blades 7, each noise reduction blade 7 is circumferentially arrayed at the outer edge of the bottom connecting disc 6 at equal intervals, the noise reduction blades 7 are structurally connected with each other, and a stable structure is formed through a connecting ring 9 at the top, so that stability of the noise reduction blades 7 is ensured, and the design not only increases strength and stability of the outer impeller set 1, but also enables the noise reduction blades 7 to maintain a consistent running state in the running process, so as to achieve a better noise reduction effect.
As can be seen from fig. 1, the inner impeller set 3 is centered on the shaft hole 8, and includes a plurality of noise reduction blades 7 circumferentially spaced apart from each other, the bottoms of the noise reduction blades 7 are fixed by the bottom connecting disc 6, the inner impeller set 3 is located inside the outer impeller set 1, so that the diameter of the inner impeller set 3 is smaller than that of the outer impeller set 1, and the diameter of the inner impeller set 3 is smaller than that of the outer impeller set 1, mainly because the inner impeller set 3 is generally used for guiding the air flow to enter and exit, and the outer impeller set 1 is mainly responsible for pushing the air flow forward, and the inner impeller set 3 is located inside the outer impeller set 1, so that a circulation space is formed between the inner impeller set and the outer impeller set, which can further improve the uniformity of the air flow, and simultaneously reduce the noise generated due to the friction between the inner impeller set and the outer impeller set.
In this embodiment, the inner impeller set 3 and the outer impeller set 1 are fixed through the bottom connection disc 6, and the inner impeller set 3 and the outer impeller set 1 are coaxially connected in series, the inner impeller set 3 is used for improving the air intake efficiency of the outer impeller set 1, meanwhile, the air flow entering the outer impeller set 1 is more uniform through precompression of the air flow in the inner impeller set 3, so as to improve the air compression effect of the outer impeller set 1, so as to increase the air volume of the fan, and the design that the inner impeller set 3 and the outer impeller set 1 are coaxially connected in series can enable the inner impeller set 3 to form a sufficiently large low pressure area in the central area of the impeller during rotation, so that the vortex intensity of the impeller inlet is reduced, the inner impeller set 3 sucks external air into the outer impeller set 1, and accelerates the external air into the outer impeller set 1, so that the air intake efficiency of the outer impeller set 1 is improved, the power consumption of the fan is reduced, meanwhile, the design reduces the vortex of the air flow entering and exiting the outer impeller set 1, so that the noise of the fan is reduced, and the performance and efficiency of the fan are improved
As can be seen from fig. 2, the sound absorbing part 5 is disposed between the inner impeller set 3 and the outer impeller set 1, the bottom of the sound absorbing part 5 is connected with the bottom connecting disc 6, the top is provided with the fixed screen 2, the fixed screen 2 is fixed by the fixing screws 4, the size of the fixed screen 2 is adapted to the gap between the inner impeller set and the outer impeller set, and the fixed screen 2 is provided with punched holes.
In the present embodiment, by providing the fixing mesh plate 2 and fixing the fixing mesh plate 2 to the sound absorbing portion 5 by the fixing screws 4, the sound absorbing portion 5 can be effectively clamped by this design, and is prevented from loosening or even falling due to strong vortex action during operation.
Optionally, the sound absorbing part 5 is filled with a sound absorbing material, which may be a fiber material, a foam material or other suitable acoustic materials, for absorbing the reflected sound generated by the outer impeller set 1 and the volute after the volute is installed, and by arranging the sound absorbing part 5 at the position, the reflected sound can be effectively absorbed, so that the noise is reduced or eliminated, and the arranged position is located in the area with smaller wind speed in the volute, so that the influence on the aerodynamic performance is smaller, and a better noise control effect is provided.
In this embodiment, the sound absorbing part 5 is disposed between the inner impeller set 3 and the outer impeller set 1, so as to increase the sound absorbing area and volume in the whole fan chamber, further increase the sound absorbing effect on the volute reflected sound, and simultaneously greatly reduce the air inlet vortex of the outer impeller set 1 by stripping the vortex in the inner impeller set 3 from the outside, thereby weakening the root of the vortex noise.
As can be seen from fig. 1, the shaft hole 8 is disposed at the center of the impeller and is used for being connected with an output shaft of the motor, and the impeller and the motor are fixed by connecting the shaft with the shaft hole, so that the motor drives the impeller to rotate.
As can be seen from fig. 1 and 2, the bottom land 6 has a stepped-up shape around the central area, which shape provides better support and stability, similar to a raised platform, and this design enables the bottom land 6 to effectively support the plurality of noise-reducing blades 7 of the inner and outer impeller sets so that they are more stable during operation, thereby achieving a noise-reducing effect, while at the same time the shape of the bottom land 6 also better guides the air flow, further reducing noise.
As can be seen from fig. 1 and 2, the noise reduction blades 7 have two different specifications, which means that the noise reduction blades 7 have differences in size, shape, etc., specifically, the blades of the inner impeller set 3 of the noise reduction blades 7 are shorter and smaller than the blades of the outer impeller set 1; the blades of the inner impeller set 3 are provided with notches only at the bottom, and notches are formed at the two ends of the top and bottom of the blades of the outer impeller set 1, the design that the notches are formed at the bottom of the blades of the inner impeller set 3 is used for improving the air inlet efficiency of the turbine, when air flows enter the turbine through the notches, the direction and the speed of the air flow can be regulated due to the design of the notches, so that the air flow is more uniform, the vortex intensity is lower, the noise is further reduced, and the efficiency is improved; the purpose of forming the breach at the blade top end both ends of outer impeller group 1 is in order to improve the stability of turbine when high-speed rotation, because the breach design at top end both ends for the blade can adapt to the impact and the disturbance of air current better when high-speed rotation, thereby keep stable operating condition.
Optionally, the noise reduction blades 7 of the inner impeller and the outer impeller are provided with stepped protrusions on the back of the noise reduction blades to break the vortex on the back of the blades, so that the strength of the vortex is further reduced.
The embodiment of the utility model further comprises a connecting ring 9, wherein the connecting ring 9 is connected with the top ends of the noise reduction blades 7 of the outer impeller set 1, a certain stable support is provided for the noise reduction blades 7, the connecting ring 9 is just like a safety device, the noise reduction blades 7 can maintain the stable state under various operation conditions, and the noise reduction blades cannot displace or fall off, so that the overall performance of the outer impeller set 1 is ensured.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the utility model and is not intended to limit the utility model, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (10)
1. The serial low-noise centrifugal fan impeller is characterized by comprising an outer impeller set (1), an inner impeller set (3) coaxial with the outer impeller set (1), a sound absorbing part (5) arranged between the outer impeller set (1) and the inner impeller set (3), a fixing screw (4), a fixing screen plate (2) arranged on the sound absorbing part (5) and fixed through the fixing screw (4), noise reducing blades (7) forming the inner impeller set (3) and the outer impeller set (1) and a connecting ring (9) arranged at the top of the outer impeller set (1); wherein,
Inhale sound portion (5) bottom and end connection pad (6) and be connected, the top is provided with fixed otter board (2), fixed otter board (2) are fixed through fixed screw (4), the size of fixed otter board (2) and the inside and outside gap adaptation between the impeller group, through the combination application to fixed otter board (2) and fixed screw (4), for inhale sound portion (5) and provide a stable and firm bearing structure.
2. The serial low-noise centrifugal fan impeller according to claim 1, wherein the outer impeller group (1) is circumferentially arrayed at equal intervals on the outer edge of the bottom connecting disc (6);
The outer impeller assembly (1) comprises a plurality of noise reducing blades (7).
3. A tandem low noise centrifugal fan impeller according to claim 1, characterized in that the inner impeller set (3) is located inside the outer impeller set (1), the inner impeller set (3) and the outer impeller set (1) being arranged in series.
4. A serial low noise centrifugal fan impeller according to claim 3, characterized in that the blade bottom of the inner impeller set (3) is provided with a notch, and the two ends of the blade top and bottom of the outer impeller set (1) are provided with notches.
5. A tandem low noise centrifugal fan impeller according to any one of claims 1-4, wherein the noise reducing blades (7) of the inner impeller set (3) and the outer impeller set (1) are each provided with stepped protrusions at their back.
6. A series low noise centrifugal fan impeller according to claim 5, wherein the inner impeller set (3) has shorter blades than the outer impeller set (1).
7. A series low noise centrifugal fan impeller according to any one of claims 1-4, wherein the sound absorbing portion (5) is filled with sound absorbing material.
8. A tandem low noise centrifugal fan impeller according to any of claims 1-4, wherein said stationary screen (2) is provided with punched holes.
9. A tandem low noise centrifugal fan impeller according to any one of claims 1-4, wherein said bottom connection disc (6) is of a stepped up shape around the central area for accommodating noise reducing blades (7) of different specifications.
10. A tandem low noise centrifugal fan impeller according to any one of claims 1-4, further comprising a shaft hole (8), said inner impeller set (3) and outer impeller set (1) being centered around said shaft hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322825370.6U CN221322825U (en) | 2023-10-20 | 2023-10-20 | Series low-noise centrifugal fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322825370.6U CN221322825U (en) | 2023-10-20 | 2023-10-20 | Series low-noise centrifugal fan impeller |
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| Publication Number | Publication Date |
|---|---|
| CN221322825U true CN221322825U (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322825370.6U Active CN221322825U (en) | 2023-10-20 | 2023-10-20 | Series low-noise centrifugal fan impeller |
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| Country | Link |
|---|---|
| CN (1) | CN221322825U (en) |
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2023
- 2023-10-20 CN CN202322825370.6U patent/CN221322825U/en active Active
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