CN111734685B - Ventilation device - Google Patents
Ventilation device Download PDFInfo
- Publication number
- CN111734685B CN111734685B CN202010644511.2A CN202010644511A CN111734685B CN 111734685 B CN111734685 B CN 111734685B CN 202010644511 A CN202010644511 A CN 202010644511A CN 111734685 B CN111734685 B CN 111734685B
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- China
- Prior art keywords
- section
- flow guide
- arc
- flow
- outer edge
- 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.)
- Expired - Fee Related
Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F04D29/66—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
- F04D29/665—Sound attenuation by means of resonance chambers or interference
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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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/025—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal comprising axial flow and radial flow stages
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a ventilation device, which comprises an oblique flow fan, wherein the oblique flow fan comprises a plurality of blades (1), a shell (2) and a flow guide part (3), and is characterized in that: the outer edge of the blade comprises a first outer edge section (14) and a second outer edge section (15), which are arc-shaped sections, and the arc-shaped bending directions of the first outer edge section and the second outer edge section are opposite; the flow guide part comprises a first flow guide section (4), a second flow guide section (5), a third flow guide section (6) and a flow guide tail section (7), the first flow guide section, the second flow guide section and the first outer edge section are arranged in parallel, and the third flow guide section and the second outer edge section are arranged in parallel. The impeller can reduce the turbulence at the inlet of the blade, reduce the pressure loss of the oblique flow impeller and reduce the noise.
Description
Technical Field
The invention relates to the technical field of ventilation (fans), in particular to a ventilation device, and specifically relates to an oblique flow fan.
Background
The diagonal flow fan as a ventilation device is widely applied to various fields of production and life, and has great market demand. However, the existing diagonal flow fan has the problems of inlet turbulent flow, large pressure loss and large noise.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a ventilation device, through the structural design of the flow guide part and the outer edge of the blade, the turbulence at the inlet of the blade can be reduced, and the pressure loss of an oblique flow impeller can be reduced; through the structural design of the resonant cavity, the noise can be effectively reduced.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a ventilation and air exchange device, its includes the diagonal flow fan, the diagonal flow fan includes a plurality of blades (1), shell (2), water conservancy diversion portion (3), and the shell is located the radial periphery of blade, and the internal perisporium of shell is provided with water conservancy diversion portion, and the blade has leading edge (11), trailing edge (12), outer fringe (13), its characterized in that: the outer edge comprises a first outer edge section (14) and a second outer edge section (15), the first outer edge section and the second outer edge section are sequentially connected and are arc-shaped sections, and the arc-shaped bending directions of the first outer edge section and the second outer edge section are opposite; the flow guide part comprises a first flow guide section (4), a second flow guide section (5), a third flow guide section (6) and a flow guide tail section (7), the first flow guide section, the second flow guide section, the third flow guide section and the flow guide tail section are sequentially connected and are arc-shaped sections, the second flow guide section is arranged in a manner of being substantially parallel to the first outer edge section, and the third flow guide section is arranged in a manner of being substantially parallel to the second outer edge section.
Further, first water conservancy diversion section is connected in the upper reaches side of second water conservancy diversion section, and the arc bump portion of water conservancy diversion tail section sets up towards the outside of the backward flow chamber that constitutes between water conservancy diversion portion and the shell, and the arc bump portion of second water conservancy diversion section sets up towards the blade, and the arc bump portion of third water conservancy diversion section sets up towards the shell.
Further, the arc salient point part of the first outer edge section is arranged towards the radial inner side of the blade, and the arc salient point part of the second outer edge section is arranged towards the flow guide part.
Furthermore, the arc-shaped salient point part of the first flow guide section is arranged towards the radial inner side of the blade, a first backflow hole (8) is formed in the first flow guide section, one end of the first backflow hole is communicated with the backflow cavity, and the other end of the first backflow hole is communicated with the front edge and/or the outer edge of the blade; and a second backflow hole (9) is formed in the flow guide tail section, one end of the second backflow hole is communicated with the backflow cavity, and the other end of the second backflow hole is communicated with the rear edge of the blade and/or the outlet end of the blade.
Furthermore, a fourth flow guide section (10) is arranged on the outer side of the first flow guide section, the fourth flow guide section is an arc-shaped section, the fourth flow guide section and the first flow guide section are integrally or separately connected and formed, the arc bending direction of the fourth flow guide section is consistent with that of the first flow guide section, an inlet backflow channel is formed between the fourth flow guide section and the first flow guide section, the inlet backflow channel is adjacently communicated with the first backflow hole, and one end, which is not connected with the first flow guide section, of the fourth flow guide section extends to the position near the connection position of the front edge and the outer edge of the blade.
Furthermore, a resonance section (16) and an arc section (17) are arranged in the reflux cavity, the resonance section and the arc section are sequentially connected, the resonance section is a horizontal section, one end of the resonance section is connected with the third flow guide section, and the other end of the resonance section is a free end.
Furthermore, a resonant cavity is formed among the resonant section, the arc-shaped section and the flow guide part, the resonant cavity is communicated with the reflux cavity, one or more communicating holes (18) are formed in the second flow guide section and are communicated with the resonant cavity, and air flow can enter the resonant cavity from the outer side of the second flow guide section.
According to the ventilation and air exchange device, the turbulence at the inlet of the blade can be reduced and the pressure loss of the oblique flow impeller can be reduced through the structural design of the flow guide part and the outer edge of the blade; through the structural design of the resonant cavity, the noise can be effectively reduced.
Drawings
Fig. 1 is a schematic structural view of an oblique flow fan of the present invention.
In the figure: (oblique flow) blade 1, outer shell/outer cylinder 2, flow guiding part 3, first flow guiding section 4, second flow guiding section 5, third flow guiding section 6, flow guiding tail section 7, first backflow hole 8, second backflow hole 9, fourth flow guiding section 10, front edge 11, rear edge 12, outer edge 13, first outer edge section 14, second outer edge section 15, resonance section 16, arc section 17 and communication hole 18; "→" airflow direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a ventilation device, it includes the diagonal flow fan, the diagonal flow fan includes a plurality of blades 1, a housing 2, water conservancy diversion portion 3, housing 2 is located the radial periphery of blade 1, the internal perisporium of housing 2 is provided with water conservancy diversion portion 3, blade 1 has leading edge 11, trailing edge 12, outer fringe 13 includes first outer fringe section 14, second outer fringe section 15, first outer fringe section 14, second outer fringe section 15 connect gradually, and all be the arc section, the arc bending direction of first outer fringe section 14, second outer fringe section 15 is opposite, specifically the arc bump portion of first outer fringe section 14 sets up towards the radial inboard of blade 1, the arc bump portion of second outer fringe section 15 sets up towards water conservancy diversion portion 3. The flow guide part 3 comprises a first flow guide section 4, a second flow guide section 5, a third flow guide section 6 and a flow guide tail section 7, the first flow guide section 4, the second flow guide section 5, the third flow guide section 6 and the flow guide tail section 7 are sequentially connected and are arc-shaped sections, the second flow guide section 5 is arranged in a manner of being substantially parallel to the first outer edge section 14, the third flow guide section 6 is arranged in a manner of being substantially parallel to the second outer edge section 15, the first flow guide section 4 is connected to the upstream side of the second flow guide section 5, and the arc-shaped convex point part of the flow guide tail section 7 is arranged towards the outer side of a backflow cavity formed between the flow guide part 3 and the shell 2; the arc bump portion of the second guide section 5 is arranged towards the blade 1, and the arc bump portion of the third guide section 6 is arranged towards the shell 2.
The arc convex point part of the first flow guide section 4 is arranged towards the radial inner side of the blade 1, a first backflow hole/communication port 8 is arranged on the first flow guide section 4, one end of the first backflow hole 8 is communicated with the backflow cavity, and the other end of the first backflow hole is communicated with the front edge 11 and/or the outer edge 13 of the blade 1; and a second backflow hole/communication port 9 is formed in the flow guide tail section 7, one end of the second backflow hole 9 is communicated with the backflow cavity, and the other end of the second backflow hole is communicated with the rear edge 12 of the blade 1 and/or the outlet end of the blade. Through the structural design of the flow guide part and the outer edge of the blade, the turbulence at the inlet of the blade can be reduced, and the pressure loss of the oblique flow impeller is reduced.
Further, a fourth flow guide section 10 is arranged on the outer side of the first flow guide section 4, the fourth flow guide section 10 is an arc-shaped section, the fourth flow guide section 10 and the first flow guide section 4 are integrally formed, the arc-shaped bending direction of the fourth flow guide section 10 and the arc-shaped bending direction of the first flow guide section 4 are consistent, an inlet backflow channel is formed between the fourth flow guide section 10 and the first flow guide section 4, the inlet backflow channel is adjacently communicated with the first backflow hole 8, and one end, which is not connected with the first flow guide section 4, of the fourth flow guide section 10 extends to the position near the connection of the front edge 11 and the outer edge 13 of the blade 1. Through the structural design of the fourth guide flow section, the turbulence at the inlet of the blade can be further reduced, and the pressure loss of the oblique flow impeller is reduced.
Furthermore, a resonance section 16 and an arc section 17 are arranged in the reflux cavity, the resonance section 16 and the arc section 17 are sequentially connected, the resonance section 16 is a horizontal section, one end of the resonance section 16 is connected with the third flow guide section 6, the other end of the resonance section is a free end, a resonant cavity is formed among the resonance section 16, the arc section 17 and the flow guide part 3, and the resonant cavity is communicated with the reflux cavity; one or more communicating holes 18 are formed in the second flow guide section 5, the communicating holes 18 are communicated with the resonant cavity, and air flow can enter the resonant cavity from the outer side of the second flow guide section 5. Through the structural design of the resonant cavity, the noise can be effectively reduced.
According to the ventilation and air exchange device, the turbulence at the inlet of the blade can be reduced and the pressure loss of the oblique flow impeller can be reduced through the structural design of the flow guide part and the outer edge of the blade; through the structural design of the resonant cavity, the noise can be effectively reduced.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (3)
1. The utility model provides a ventilation and air exchange device, its includes the diagonal flow fan, the diagonal flow fan includes a plurality of blades (1), shell (2), water conservancy diversion portion (3), and the shell is located the radial periphery of blade, and the internal perisporium of shell is provided with water conservancy diversion portion, and the blade has leading edge (11), trailing edge (12), outer fringe (13), its characterized in that: the outer edge comprises a first outer edge section (14) and a second outer edge section (15), the first outer edge section and the second outer edge section are sequentially connected and are arc-shaped sections, and the arc-shaped bending directions of the first outer edge section and the second outer edge section are opposite; the flow guide part comprises a first flow guide section (4), a second flow guide section (5), a third flow guide section (6) and a flow guide tail section (7), the first flow guide section, the second flow guide section, the third flow guide section and the flow guide tail section are sequentially connected and are arc-shaped sections, the second flow guide section is arranged in parallel with the first outer edge section, and the third flow guide section is arranged in parallel with the second outer edge section;
the first flow guide section is connected to the upstream side of the second flow guide section, the arc-shaped convex point part of the flow guide tail section is arranged towards the outer side of a backflow cavity formed between the flow guide part and the shell, the arc-shaped convex point part of the second flow guide section is arranged towards the blades, and the arc-shaped convex point part of the third flow guide section is arranged towards the shell; the arc-shaped convex point part of the first outer edge section is arranged towards the radial inner side of the blade, and the arc-shaped convex point part of the second outer edge section is arranged towards the flow guide part; the arc-shaped salient point part of the first flow guide section is arranged towards the radial inner side of the blade, a first backflow hole (8) is formed in the first flow guide section, one end of the first backflow hole is communicated with the backflow cavity, and the other end of the first backflow hole is communicated with the front edge and/or the outer edge of the blade; a second backflow hole (9) is formed in the flow guide tail section, one end of the second backflow hole is communicated with the backflow cavity, and the other end of the second backflow hole is communicated with the rear edge of the blade and/or the outlet end of the blade; the backflow cavity is internally provided with a resonance section (16) and an arc section (17), the resonance section and the arc section are sequentially connected, the resonance section is a horizontal section, one end of the resonance section is connected with the third flow guide section, and the other end of the resonance section is a free end.
2. A ventilation device as claimed in claim 1, wherein a fourth flow guiding section (10) is disposed outside the first flow guiding section, the fourth flow guiding section is an arc-shaped section, the fourth flow guiding section is integrally or separately connected and formed with the first flow guiding section, the arc-shaped bending direction of the fourth flow guiding section is the same as that of the first flow guiding section, an inlet return channel is formed between the fourth flow guiding section and the first flow guiding section, the inlet return channel is adjacently communicated with the first return hole, and one end of the fourth flow guiding section, which is not connected with the first flow guiding section, extends to the vicinity of the connection between the leading edge and the outer edge of the vane.
3. A ventilation device according to claim 1 or 2, wherein a resonant cavity is formed between the resonant section, the arc-shaped section and the flow guide portion, the resonant cavity is communicated with the return cavity, one or more communication holes (18) are formed in the second flow guide section, the communication holes are communicated with the resonant cavity, and the air flow can enter the resonant cavity from the outer side of the second flow guide section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010644511.2A CN111734685B (en) | 2020-07-07 | 2020-07-07 | Ventilation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010644511.2A CN111734685B (en) | 2020-07-07 | 2020-07-07 | Ventilation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111734685A CN111734685A (en) | 2020-10-02 |
| CN111734685B true CN111734685B (en) | 2021-11-02 |
Family
ID=72654322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010644511.2A Expired - Fee Related CN111734685B (en) | 2020-07-07 | 2020-07-07 | Ventilation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111734685B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI774627B (en) * | 2021-12-28 | 2022-08-11 | 元山科技工業股份有限公司 | Noise suppression fan |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU926369A1 (en) * | 1978-10-19 | 1982-05-07 | Предприятие П/Я Р-6131 | Fan casing |
| US5308225A (en) * | 1991-01-30 | 1994-05-03 | United Technologies Corporation | Rotor case treatment |
| GB2413158B (en) * | 2004-04-13 | 2006-08-16 | Rolls Royce Plc | Flow control arrangement |
| CN104514737A (en) * | 2013-10-04 | 2015-04-15 | 德昌电机(深圳)有限公司 | Ventilation assembly |
| CN107191412A (en) * | 2017-07-24 | 2017-09-22 | 北京航空航天大学 | A kind of multi stage axial flow compressor of the adaptive blowing suction of front stage stator |
| CN107989804A (en) * | 2017-11-24 | 2018-05-04 | 深圳福世达动力科技有限公司 | Birotor is to turning punching press compressor |
| US20190226350A1 (en) * | 2018-01-22 | 2019-07-25 | Gecheng Zha | Turbomachines That Include a Casing Treatment |
-
2020
- 2020-07-07 CN CN202010644511.2A patent/CN111734685B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU926369A1 (en) * | 1978-10-19 | 1982-05-07 | Предприятие П/Я Р-6131 | Fan casing |
| US5308225A (en) * | 1991-01-30 | 1994-05-03 | United Technologies Corporation | Rotor case treatment |
| GB2413158B (en) * | 2004-04-13 | 2006-08-16 | Rolls Royce Plc | Flow control arrangement |
| CN104514737A (en) * | 2013-10-04 | 2015-04-15 | 德昌电机(深圳)有限公司 | Ventilation assembly |
| CN107191412A (en) * | 2017-07-24 | 2017-09-22 | 北京航空航天大学 | A kind of multi stage axial flow compressor of the adaptive blowing suction of front stage stator |
| CN107989804A (en) * | 2017-11-24 | 2018-05-04 | 深圳福世达动力科技有限公司 | Birotor is to turning punching press compressor |
| US20190226350A1 (en) * | 2018-01-22 | 2019-07-25 | Gecheng Zha | Turbomachines That Include a Casing Treatment |
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| Publication number | Publication date |
|---|---|
| CN111734685A (en) | 2020-10-02 |
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Effective date of registration: 20211018 Address after: 330000 No. 333, Xinwei Avenue, Xiaolan economic and Technological Development Zone, Nanchang County, Nanchang City, Jiangxi Province Applicant after: JIANGXI LEFU MILITARY EQUIPMENT Co.,Ltd. Address before: 330000 No. 899 Torch Five Road, Nanchang High-tech Industrial Development Zone, Nanchang City, Jiangxi Province Applicant before: JIANGXI ZIXUAN TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20211102 |