CN218717646U - Axial-flow type low-noise centrifugal fan - Google Patents
Axial-flow type low-noise centrifugal fan Download PDFInfo
- Publication number
- CN218717646U CN218717646U CN202222662727.9U CN202222662727U CN218717646U CN 218717646 U CN218717646 U CN 218717646U CN 202222662727 U CN202222662727 U CN 202222662727U CN 218717646 U CN218717646 U CN 218717646U
- Authority
- CN
- China
- Prior art keywords
- fan
- axial
- main shaft
- impeller
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007664 blowing Methods 0.000 claims abstract description 24
- 230000008602 contraction Effects 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application provides an axial-flow type low noise centrifugal fan belongs to fan technical field. The axial-flow type low-noise centrifugal fan comprises an air duct assembly and a blowing assembly. The air duct assembly comprises a fan cover and a main shaft, the fan cover is divided into a contraction section and an expansion section, the main shaft is rotatably connected with the fan cover, the air blowing assembly comprises a barrel-shaped impeller and fan blades, the fan blades are uniformly distributed and fixed on the outer circle of the main shaft, and the impeller is fixedly connected with the main shaft through all the fan blades. In the application, the air blowing assembly forms two air paths by utilizing the fan blades and the barrel-shaped impeller, axial-flow air blowing of the fan blades and centrifugal air blowing of the impeller are converged to the expansion section, and the condition that the airflow section of single centrifugal air blowing is suddenly increased in the expansion section to reduce the airflow speed is complemented.
Description
Technical Field
The application relates to the technical field of fans, in particular to an axial-flow type low-noise centrifugal fan.
Background
The existing electric fan is generally divided into an axial flow fan and a centrifugal fan, an impeller of the axial flow fan drives airflow to flow along the axial direction of the fan, air inlet and air outlet quantity is large, but air pressure is relatively small, energy consumption is relatively low, and the electric fan is suitable for scenes with large ventilation quantity requirements and low air pressure requirements. The impeller of the centrifugal fan drives gas to enter the impeller space along the axial direction of the impeller and flow out in the radial direction at an accelerated speed under the action of centrifugal force, so that air flow with relatively large air pressure can be obtained, but the air inlet and outlet volume is small relative to the axial flow fan, the energy consumption is relatively high, and the centrifugal fan is suitable for scenes with low air volume requirement and high air pressure requirement.
In actual production and life, the fan is often required to provide larger axial air quantity and air pressure, the consumption of electric quantity can be reduced, the existing common axial flow fan and the centrifugal fan cannot meet the requirements at the same time, and the structure of the fan needs to be improved.
To this end, chinese patent application No. CN202121221231.7 discloses an axial flow centrifugal fan, and this scheme mainly makes the air current that enters into the centrifugal impeller space through the air inlet tube under the effect of centrifugal force by the radial propelling movement of centrifugal impeller to the conical shell in, by in the air inlet channel that a plurality of adjacent deflectors constitute, the air current enters into the air outlet tube and axial discharge through the air outlet channel axial under the common direction of the cambered inner wall of conical shell and deflector, so that the utility model discloses can utilize centrifugal impeller to provide axial air current, simultaneously, utilize conical shell and deflector to replace ordinary centrifugal fan's spiral case structure, after the air current is accelerated by centrifugal impeller, high-speed air current is derived to the air outlet channel by the cambered inner wall cisoid of deflector and conical shell after entering through the air inlet channel, and amount of wind and wind pressure loss are little, make the air current derived by the air outlet tube have the characteristics of big, high wind pressure simultaneously.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
the radial blowout of the absorptive air current of impeller leads to the excircle diameter great, and rotatory air current blows off through the axial of water conservancy diversion piece guide back, and when crossing the impeller back at high speed, negative pressure zone appears at the impeller back and the expansion effect of conical barrel leads to the air current cross-section to increase suddenly, also leads to the air current speed to slow down.
SUMMERY OF THE UTILITY MODEL
In order to make up for the above deficiencies, the present application provides an axial-flow low-noise centrifugal fan, which aims to improve the problems mentioned in the above background art.
The application provides an axial-flow type low noise centrifugal fan, including wind channel subassembly and air-blast subassembly.
The air duct assembly comprises a fan cover and a main shaft, the fan cover is divided into a contraction section and an expansion section, the main shaft is rotatably connected with the fan cover, the air blowing assembly comprises a barrel-shaped impeller and fan blades, the fan blades are uniformly distributed and fixed on the outer circle of the main shaft, and the impeller is fixedly connected with the main shaft through all the fan blades.
Furthermore, the air duct assembly further comprises two supports, the inner walls of two ends of the fan housing are fixedly connected with one support, and two ends of the main shaft are rotatably connected with the fan housing through the corresponding supports.
Furthermore, the air duct assembly further comprises a motor, the motor is fixedly connected with the corresponding support, and the output end of the motor is connected with the spindle shaft.
Furthermore, the air duct assembly further comprises a tail cone, and the tail cone is fixedly connected with the tail end of the motor.
Furthermore, the air duct assembly further comprises a protective net, and the protective net is fixedly plugged at the front end of the fan cover.
Furthermore, the air duct assembly further comprises flow deflectors which are uniformly distributed and fixed on the inner wall of the fan housing.
Furthermore, the air blowing assembly further comprises a guide fan, the guide fan is fixedly connected with the corresponding support, the main shaft movably penetrates through the guide fan, and the deflection directions of blades of the guide fan and blades of the guide fan are opposite.
Furthermore, the blowing assembly further comprises a fan, and the fan is connected with the spindle shaft.
Compared with the prior art, the beneficial effect of this application: the expansion section is used for adapting to centrifugal blast of the impeller, and the contraction section is characterized in that airflow cross sections at two ends of the fan cover are kept the same so as to reduce the reduction of the flow velocity of air caused by the difference of the flow cross sections.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic structural view of an axial flow type low noise centrifugal fan provided by an embodiment of the present application;
FIG. 2 is a schematic view of a connection relationship between a fan and a spindle according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a connection relationship between a main shaft and an impeller according to an embodiment of the present disclosure;
fig. 4 is a schematic structural view of a connection relationship between an impeller and a guide vane according to an embodiment of the present application.
In the figure: 100-an air duct assembly; 110-wind cover; 120-a main shaft; 130-a scaffold; 140-a motor; 150-caudal vertebra; 160-protective net; 170-flow deflectors; 200-a blower assembly; 210-an impeller; 220-fan blades; 230-a guide fan; 240-Fan.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Referring to fig. 1, the present application provides an axial-flow low-noise centrifugal fan including an air duct assembly 100 and a blower assembly 200.
The blower assembly 200 uses the fan blades 220 and the bucket-shaped impeller 210 to form two air paths, and axial-flow blowing of the fan blades 220 and centrifugal blowing of the impeller 210 are converged to the expansion section, so that the condition that the airflow speed is reduced due to the fact that the airflow section of single centrifugal blowing is suddenly increased in the expansion section is complemented.
Referring to fig. 1-4, the air duct assembly 100 includes a fan housing 110 and a main shaft 120, the fan housing 110 is divided into a contraction section and an expansion section, the main shaft 120 is rotatably connected to the fan housing 110, the blower assembly 200 includes a barrel-shaped impeller 210 and blades 220, the blades 220 are uniformly distributed and fixed on the outer circle of the main shaft 120, and the impeller 210 is fixedly connected to the main shaft 120 through all the blades 220. Here, the expansion section is adapted to the centrifugal blowing of the impeller 210, and the contraction section is to keep the airflow cross sections at the two ends of the fan cover 110 the same, so as to reduce the flow rate slowing due to the difference of the flow cross sections of the air, during operation, the main shaft 120 drives the impeller 210 to rotate through the fan blades 220, and drives a part of the airflow to enter the expansion section outwards by using centrifugal force, and the rotation of the fan blades 220 has an axial flow blowing effect, and directly drives a part of the airflow to the expansion section, so as to complement the airflow at the expansion section, and avoid the reduction of the airflow rate due to the expansion of the airflow, it should be noted that the gap between the front end of the impeller 210 and the fan cover 110 is small, so as to reduce the air leakage, and in summary, the blowing assembly 200 utilizes the fan blades 220 and the barrel-shaped impeller 210 to form two air paths, and converges the axial flow blowing of the fan blades 220 and the centrifugal blowing of the impeller 210 to the expansion section, thereby complementing the situation that the airflow rate is reduced due to the sudden increase of the airflow cross section of the single centrifugal blowing at the expansion section.
Referring to fig. 1-2, the air duct assembly 100 further includes two brackets 130, the two brackets 130 are disposed, the inner walls of the two ends of the fan housing 110 are fixedly connected to the brackets 130, and the two ends of the main shaft 120 are rotatably connected to the fan housing 110 through the corresponding brackets 130. The air duct assembly 100 further includes a motor 140, the motor 140 is fixedly connected to the corresponding bracket 130, and an output end of the motor 140 is connected to the spindle 120. The air duct assembly 100 further includes a tail cone 150, and the tail cone 150 is fixedly connected to the rear end of the motor 140. Here, the two brackets 130 support the main shaft 120 at the center of the fan housing 110, the motor 140 drives the main shaft 120 to rotate and further drives the fan blades 220 and the impeller 210 to rotate, in order to reduce the air flow blowing through the motor 140 and generating a vortex at the rear of the motor 140, a tail cone 150 is provided here to guide the air flow, reduce the generation of the vortex and reduce the influence on the speed of the air flow, in this embodiment, the outer end of the bracket 130 is fixedly connected with the fan housing 110 through a cushion pad to reduce the transmission of the vibration of the motor 140 and the main shaft 120 to the fan housing 110 to reduce the noise.
Referring to fig. 2, the air duct assembly 100 further includes a protective net 160, and the protective net 160 is fixedly plugged at the front end of the fan housing 110. Here, the protection net 160 is used to prevent foreign materials from entering the hood 110, which may affect the internal structure.
Referring to fig. 1-4, the air duct assembly 100 further includes a baffle 170, and the baffle 170 is uniformly distributed and fixed on the inner wall of the fan housing 110. Here, when the impeller 210 rotates, the air moves outward from the center of the impeller 210 and enters the expansion section of the shroud 110, and since the air flows out of the impeller 210 due to the rotation of the impeller 210 and also rotates, the guide fan 230 is provided to guide the rotating air flow to an axial flow state.
Referring to fig. 2-4, the blower assembly 200 further includes a guide fan 230, the guide fan 230 is fixedly connected to the corresponding bracket 130, the main shaft 120 movably penetrates through the guide fan 230, and the deflection directions of the blades of the guide fan 230 and the fan blades 220 are opposite. Here, since the wind pressure generated by the impeller 210 is large and the wind pressure generated by the fan blade 220 is small, in order to prevent the airflow from flowing backward through the fan blade 220 or the fan blade 220 from blowing the wind, the guide fan 230 is provided, the guide fan 230 has the same size and shape as the fan blade 220 but has a different deflection direction, the fan blade 220 has a larger area to increase the generated wind pressure, and the guide fan 230 is located inside the barrel-shaped impeller 210 to reduce the air leakage.
Referring to fig. 1-2, the blower assembly 200 further includes a fan 240, and the fan 240 is coupled to the spindle 120. Here, since the impeller 210 is located at the narrowest part of the fan housing 110, and the airflow section is small, in order to ensure the airflow supply, the fan 240 is provided to increase the airflow suction amount, and in this embodiment, the fan 240 has more blades to provide a larger airflow amount.
The working principle of the axial-flow type low-noise centrifugal fan is as follows: the expansion section is adapted to centrifugal blowing of the impeller 210, and the contraction section is characterized in that airflow cross sections at two ends of the fan cover 110 are kept the same to reduce the flow rate slowing due to different flow cross sections of air, when the air blower is in operation, the motor 140 drives the main shaft 120 to rotate, the impeller 210 is driven to rotate by the fan blade 220, the fan 240 simultaneously rotates to suck a large amount of air, the impeller 210 drives a part of the air to flow outwards by using centrifugal force to enter the expansion section, the rotation of the fan blade 220 has an axial flow blowing effect, and the part of the air is directly driven to the expansion section to complement the expansion of the airflow cross section of the expansion section, so that the airflow speed is reduced.
It should be noted that the specific model specifications of the spindle 120, the motor 140, the protective screening 160 and the fan 240 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art, so detailed description is omitted.
The power supply of the motor 140 and its principle will be clear to a person skilled in the art and will not be described in detail here.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An axial-flow low-noise centrifugal fan is characterized by comprising
The air duct assembly (100) comprises a fan cover (110) and a main shaft (120), the fan cover (110) is divided into a contraction section and an expansion section, and the main shaft (120) is rotatably connected with the fan cover (110);
the air blowing assembly (200) comprises a barrel-shaped impeller (210) and fan blades (220), the fan blades (220) are uniformly distributed and fixed on the excircle of the main shaft (120), and the impeller (210) is fixedly connected with the main shaft (120) through all the fan blades (220).
2. The axial-flow low-noise centrifugal fan according to claim 1, wherein the air duct assembly (100) further comprises two brackets (130), two brackets (130) are provided, one bracket (130) is fixedly connected to inner walls of two ends of the fan housing (110), and two ends of the main shaft (120) are rotatably connected to the fan housing (110) through the corresponding brackets (130).
3. The axial-flow type low-noise centrifugal fan according to claim 2, wherein the air duct assembly (100) further comprises a motor (140), the motor (140) is fixedly connected with the corresponding bracket (130), and an output end of the motor (140) is connected with the spindle (120) through a shaft.
4. The axial-flow type low-noise centrifugal fan according to claim 3, wherein the air duct assembly (100) further comprises a tail cone (150), and the tail cone (150) is fixedly connected with the tail end of the motor (140).
5. The axial-flow low-noise centrifugal fan according to claim 4, wherein the air duct assembly (100) further comprises a protective net (160), and the protective net (160) is fixedly plugged at the front end of the fan housing (110).
6. The axial-flow type low-noise centrifugal fan according to claim 5, wherein the air duct assembly (100) further comprises a baffle (170), and the baffle (170) is uniformly distributed and fixed on the inner wall of the fan housing (110).
7. The axial-flow type low-noise centrifugal fan according to claim 6, wherein the blowing assembly (200) further comprises a guide fan (230), the guide fan (230) is fixedly connected with the corresponding bracket (130), the main shaft (120) movably penetrates through the guide fan (230), and the deflection directions of the blades of the guide fan (230) and the blades (220) are opposite.
8. The axial flow, low noise centrifugal fan of claim 7, wherein said blower assembly (200) further comprises a fan (240), said fan (240) being connected to said spindle (120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222662727.9U CN218717646U (en) | 2022-10-10 | 2022-10-10 | Axial-flow type low-noise centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222662727.9U CN218717646U (en) | 2022-10-10 | 2022-10-10 | Axial-flow type low-noise centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218717646U true CN218717646U (en) | 2023-03-24 |
Family
ID=85583853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222662727.9U Active CN218717646U (en) | 2022-10-10 | 2022-10-10 | Axial-flow type low-noise centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218717646U (en) |
-
2022
- 2022-10-10 CN CN202222662727.9U patent/CN218717646U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109882426B (en) | Glass fiber reinforced plastic axial flow fan | |
| CN205101257U (en) | Cylindric centrifugal fan | |
| JP3204521U (en) | fan | |
| JP2011007147A (en) | Exhaust gas flow power plant | |
| CN110374925B (en) | Double-layer current collector and mixed flow fan assembled with same | |
| CN218717646U (en) | Axial-flow type low-noise centrifugal fan | |
| CN209180085U (en) | A kind of flow-guiding type air intake centrifugal blower | |
| CN105673559B (en) | Efficient meridionally-accelerated axial flow fan with casing | |
| CN113883099B (en) | High-efficient wind-guiding structure and fan | |
| CN212838631U (en) | Axial fan that makes an uproar falls in damping | |
| CN212177508U (en) | Stable, efficient and low-noise mixed flow ventilator | |
| CN211501080U (en) | Air inlet door structure and drying fan | |
| CN218971459U (en) | Low-noise centrifugal fan | |
| CN202789616U (en) | Axial centrifugal fan | |
| CN112065783A (en) | Ultra-low noise meridian acceleration axial flow fan | |
| CN207393563U (en) | A kind of blade of draught fan impeller | |
| CN111425459A (en) | Axial flow fan with 0.5 hub ratio | |
| JPH0822140B2 (en) | Electrically operated mechanical fan | |
| CN217206929U (en) | Accelerating type mixed flow fan at noon | |
| CN205260421U (en) | Vacuum pump motor fan wheel | |
| CN103821772A (en) | Optimized control rod drive mechanism cooling fan | |
| CN211202367U (en) | Fan structure and off-premises station | |
| CN203702665U (en) | Improved cooling fan of control bar driving mechanism | |
| CN208816359U (en) | High-efficient noise-reducing blower | |
| CN215333531U (en) | Non-equidistant radial clearance axial flow fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231011 Address after: 234000 Suzhou high tech Zone, Anhui Province Patentee after: Xingkong Intelligent Equipment (Anhui) Co.,Ltd. Address before: 214200 Gaoyong Village, Gaoyong Town, Yixing City, Wuxi City, Jiangsu Province Patentee before: Yixing XingKong Industrial Equipment Co.,Ltd. |