CN114658685A - Multi-wing centrifugal machine impeller for automobile - Google Patents
Multi-wing centrifugal machine impeller for automobile Download PDFInfo
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- CN114658685A CN114658685A CN202210469175.1A CN202210469175A CN114658685A CN 114658685 A CN114658685 A CN 114658685A CN 202210469175 A CN202210469175 A CN 202210469175A CN 114658685 A CN114658685 A CN 114658685A
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- impeller
- blade
- wheel disc
- wing
- end cover
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- 238000009434 installation Methods 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 abstract description 12
- 238000013461 design Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 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
- F04D29/26—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
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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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
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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
- F04D29/667—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a multi-wing centrifugal machine impeller for an automobile, which comprises an upper end cover, a wheel disc and blades arranged between the upper end cover and the wheel disc, wherein the radius of the front edge of each blade is gradually reduced along the direction from the upper end cover to the wheel disc. The automobile high-efficiency multi-wing centrifugal fan impeller comprises arc-shaped blades and a wheel disc, wherein the chord lengths of the arc-shaped blades along the axis of the impeller are different, the front edge of each blade is a Bezier curve, the shape of the front edge of each blade is adjusted through a control point, the inner diameter of the upstream of the impeller is increased, the flow resistance at the inlet of the impeller is reduced, the vortex in a blade flow channel is reduced, and the impact loss of the impeller is reduced; the wheel disc contour line is a Bessel curve, the shape of the wheel disc contour line is adjusted through the control points, the wheel disc contour line is enabled to be more in line with the flow field characteristics inside the impeller, the efficiency of the multi-wing centrifugal fan impeller is further improved, and the impeller is integrally formed, simple and reliable in structure and convenient to popularize and apply.
Description
Technical Field
The invention relates to the technical field of fluid machinery, in particular to a centrifugal machine technology for an automobile.
Background
The multi-wing centrifugal fan has the characteristics of large flow coefficient, high pressure coefficient, compact structure, low noise and the like, and is widely applied to a vehicle-mounted air conditioning system as a gas conveying device. The multi-wing centrifugal fan consists of a multi-wing centrifugal fan impeller, a volute and a motor. The multi-wing centrifugal fan impeller is generally composed of dozens of straight blades with equal chord lengths, namely, the inlet edge and the outlet edge of each blade are parallel to the axis of the impeller, so that the blades can be conveniently machined, and the inlet and outlet installation angles of the blades can be conveniently adjusted to meet different fan performance requirements.
However, the inner diameter and the inlet installation angle of such straight blades with equal chord length are equal at each point of the leading edge of the blade, and the airflow inside the multi-blade centrifugal fan impeller and the airflow upstream and downstream are not uniformly distributed along the axial direction, which causes a large difference between the impact loss upstream and downstream of the impeller. The structural size of the straight blade with equal chord length is inconsistent with the distribution characteristics of airflow upstream and downstream of the impeller along the distribution rule of the axis of the impeller, so that the blockage of the flow channel is aggravated, the vortex is easily formed inside the flow channel, the air outlet of the fan is not smooth, the improvement of the efficiency of the fan is not facilitated, and the generation of larger noise is accompanied. However, the automobile industry is continuously turning to the electric driving and intelligent direction, which puts higher requirements on the efficiency and noise level of the multi-blade centrifugal fan, and therefore, it is particularly important to improve the performance of the multi-blade centrifugal fan for automobiles.
Disclosure of Invention
The invention aims to provide an impeller of a multi-wing centrifugal machine for an automobile, which aims to solve the problems that in the prior art, vortex is easily formed in a flow channel, and the air outlet of a fan is not smooth.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a multi-wing centrifuge impeller for car, includes upper end cover and rim plate, its characterized in that: the blade is installed between the upper end cover and the wheel disc, and the radius of the front edge of the blade is gradually reduced along the direction from the upper end cover to the wheel disc.
According to the technical means, as a large positive attack angle exists between the upstream airflow of the impeller and the blades, vortex is easy to generate, the flow channel is blocked, and the energy loss is increased, the radius of the front edge of the blade is gradually reduced along the direction from the upper end cover to the wheel disc, so that the upstream inner diameter of the impeller is increased, the flow resistance at the inlet of the impeller is reduced, the vortex in the flow channel of the blade is reduced, and the impact loss of the impeller is reduced.
Further, the inlet installation angle of the blade gradually increases along the direction from the upper end cover to the wheel disc.
According to the technical means, the entrance attack angle is reduced, the vortex in the blade flow passage is further reduced, and the impact loss of the impeller is reduced.
Further, the maximum angle of the inlet setting angle of the blade is smaller than the outlet setting angle of the blade.
Further, in a meridian plane view of the automotive multi-wing centrifuge impeller, a contour line of a leading edge of the impeller is in a bezier curve shape.
According to the technical means, the contour line shape of the front edge of the impeller can be adjusted by adjusting a plurality of control points in the design stage, so that the design complexity is reduced.
Further, the inlet installation angle of the blade is 60-90 degrees.
Further, the outlet installation angle of the blade is 150-180 degrees.
Further, the radius of the wheel disc gradually increases along the direction from the upper end cover to the wheel disc.
Further, on a meridian plane view of the automotive multi-wing centrifuge impeller, the contour line of the wheel disc is in a Bessel curve shape.
According to the technical means, the contour line shape of the front edge of the impeller can be adjusted by adjusting a plurality of control points in the design stage, so that the complexity of design is reduced.
Further, the upper end cover, the wheel disc and the blade combination structure are integrally formed.
According to the technical means, the processing steps and complexity are reduced, and the production efficiency is improved.
Further, the trailing edge of the blade is parallel to the axial direction of the multi-wing centrifugal machine impeller for the automobile.
The invention has the beneficial effects that:
the automobile high-efficiency multi-wing centrifugal fan impeller comprises arc-shaped blades and a wheel disc, wherein the chord lengths of the arc-shaped blades along the axis of the impeller are different, the front edge of each blade is a Bezier curve, the shape of the front edge of each blade is adjusted through a control point, the inner diameter of the upstream of the impeller is increased, the flow resistance at the inlet of the impeller is reduced, and meanwhile, the installation angle of the inlet of each blade close to the upper end cover side is smaller than that of the wheel disc side, so that the reduction of vortex in a blade flow channel is facilitated, and the impact loss of the impeller is reduced; the wheel disc contour line is a Bezier curve, the shape of the wheel disc contour line is adjusted through the control points, the wheel disc contour line is enabled to be more in line with the flow field characteristics inside the impeller, the efficiency of the multi-wing centrifugal fan impeller is further improved, and the impeller is integrally formed, simple and reliable in structure and convenient to popularize and apply.
Drawings
Figure 1 is a meridional view of the invention with the ordinate R being the radial coordinate of the meridian plane of the impeller and the abscissa Z being the longitudinal coordinate of the meridian plane of the impeller;
FIG. 2 is a three-dimensional view of the present invention.
Wherein, 1-upper end cover contour line; 2-a control point; 3-a control point; 4-contour line of the leading edge of the blade; 5-a control point; 6-trailing edge contour line of the blade; 7-control point; 8-control points; 9-contour line of the wheel disc; 10-a control point; 11-upper end cap; 12-a blade; 13-wheel disk.
Detailed Description
Other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein, wherein embodiments of the present invention are described below with reference to the accompanying drawings and preferred embodiments. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The embodiment provides a multi-wing centrifuge impeller for an automobile, which comprises an upper end cover 11 and a wheel disc 13, wherein the upper end cover outline 1 is positioned at the upstream of the impeller, and the wheel disc 13 is positioned at the downstream of the impeller and close to a motor, as shown in fig. 2. The blades 12 are arranged between the upper cover 11 and the disk 13, and are plural in number, arranged circumferentially along the upper cover 11. The blades 12 are forward curved blades.
Inlet setting angle beta of blade160 degrees to 90 degrees and an outlet installation angle beta2150 to 180 degrees and an inlet installation angle beta1The tangential velocity of the airflow in the portion, which is closer to the wheel disc 13, of the impeller is greater along with the rotation of the impeller, and the tangential velocity of the airflow is smaller closer to the area inside the impeller of the upper end cover 11, and the larger inlet installation angle easily forms a larger inlet attack angle, so that the flow separation is more easily generated, the energy loss is caused, and the larger the position, which is closer to the wheel disc 13, of the inlet installation angle, the larger the inlet installation angle is, so that the condition that the upstream and downstream flow fields of the impeller are uneven can be better adapted, the impact on the inside of the impeller is further reduced, and the efficiency of the multi-wing centrifugal fan is improved.
In the present embodiment, the leading edge of the blade 12 is of a variable chord length, and as shown in fig. 1, in the meridian plane of the impeller, the leading edge of the blade is not parallel to the axis of the impeller, and as is known, the leading edge of the blade is formed by the position closest to the axis of the impeller, and therefore, after entering the interior of the impeller, the air comes into contact with the leading edge of the blade 12 before it. The radius of the leading edge contour 4 of the blade gradually decreases in the direction from the upper end cover 11 to the disk 13, so that the inner diameter upstream of the impeller increases, reducing the flow resistance at the impeller inlet. And the front edge contour line 4 of the blade is a Bezier curve, and the curve is provided with a control point 2, a control point 3 and a control point 5. The trailing edge of the impeller 12 is parallel to the axis of the impeller.
On the meridian plane of the impeller, the radii at the points on the contour line 9 of the disk increase progressively along the axis from upstream to downstream of the impeller, with the trend of increasing presenting a characteristic of first rapid, then slow and then rapid. The contour line 9 of the wheel disc is a bezier curve, and the curve has a control point 7, a control point 8 and a control point 10.
In this embodiment, the contour line 9 of the wheel disc and the leading edge contour line 4 of the blade are both designed as bezier curves, the shapes of the contour line 9 of the wheel disc and the leading edge contour line 4 of the blade can be adjusted by adjusting several control points, and further, the shape of the blade is optimized by adjusting only several control points, thereby simplifying the design process and steps, specifically, the shape of the leading edge contour line 4 of the blade can be adjusted by adjusting the control points 2, 3 and 5, and the shape of the contour line 9 of the wheel disc can be adjusted by adjusting the control points 7, 8 and 10.
In this embodiment, the upper end cover 11, the wheel disc 13 and the blades 12 are integrally formed, so that the production process is saved, and the production complexity is reduced.
The method comprises the steps of carrying out simulation experiments by using STAR-CCM + commercial CFD software, carrying out comparative analysis on the working efficiency of the high-efficiency multi-wing centrifugal impeller and the straight blade impeller with equal chord length by using a readable K-Epsilon turbulence model, dispersing a control equation by using a finite volume method, and adopting a second-order difference dispersion format for a momentum equation and a turbulence diffusion equation in a dispersion equation. The calculation model is from a multi-blade centrifugal fan in an automobile air-conditioning box, the inner diameter of an impeller is 122, the outer diameter of the impeller is 147, and the number of blades is 44. In the calculation of the rotating flow of the fan impeller, a multi-reference-system model MRF is adopted, the impeller area adopts a rotating coordinate system, an upper end cover, blades and a wheel disc are rotating wall surfaces, the wall surfaces meet the condition of non-slip boundary, and other areas adopt a static coordinate system. The inlet of the fan is given a boundary condition of zero relative atmospheric pressure and the outlet is set to be the mass flow outlet boundary. Through computational analysis, the automobile high-efficiency multi-wing centrifugal fan has the advantages that the impact loss of the automobile high-efficiency multi-wing centrifugal fan at the upstream of the impeller is smaller, the vortex structure of the flow channel between the blades is less, and the flow channel is smoother. Under the air flow corresponding to the working point, after the impeller of the multi-wing centrifugal fan in the air-conditioning box is replaced by the traditional impeller to form the high-efficiency multi-wing centrifugal fan for the automobile, the static pressure efficiency of the fan is improved to 43.27 percent from the original 39.17 percent, the efficiency is improved by over 4 percent, and the static pressure of the outlet of the fan is basically kept unchanged, thereby proving the effectiveness of the invention.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention.
Claims (10)
1. The utility model provides a multi-wing centrifuge impeller for car, includes upper end cover and rim plate, its characterized in that: the blade is installed between the upper end cover and the wheel disc, and the radius of the front edge of the blade is gradually reduced along the direction from the upper end cover to the wheel disc.
2. The automotive multi-wing centrifuge impeller according to claim 1, characterized in that: the inlet mounting angle of the blade gradually increases along the direction from the upper end cover to the wheel disc.
3. The automotive multi-wing centrifuge impeller according to claim 2, characterized in that: the maximum angle of the inlet setting angle of the blade is smaller than the outlet setting angle of the blade.
4. The automotive multi-wing centrifuge impeller according to claim 1, characterized in that: on a meridian plane view of the impeller of the automotive multi-wing centrifuge, the contour line of the front edge of the impeller is in a Bessel curve shape.
5. The automotive multi-wing centrifuge impeller according to claim 3, characterized in that: the inlet installation angle of the blade is 60-90 degrees.
6. The automotive multi-wing centrifuge impeller according to claim 3, characterized in that: the outlet installation angle of the blade is 150-180 degrees.
7. The automotive multi-wing centrifuge impeller according to claim 1, characterized in that: the radius in the wheel disc increases gradually along a direction from the upper end cover to the wheel disc.
8. The automotive multi-wing centrifuge impeller according to claim 7, characterized in that: on a meridian plane view of the multi-wing centrifugal machine impeller for the automobile, the contour line of the wheel disc is in a Bessel curve shape.
9. The automotive multi-wing centrifuge impeller according to claim 1, characterized in that: the upper end cover, the wheel disc and the blade are integrally formed.
10. The automotive multi-wing centrifuge impeller according to claim 1, characterized in that: the trailing edge of the blade is parallel to the axial direction of the impeller of the multi-wing centrifugal machine for the automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469175.1A CN114658685A (en) | 2022-04-30 | 2022-04-30 | Multi-wing centrifugal machine impeller for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210469175.1A CN114658685A (en) | 2022-04-30 | 2022-04-30 | Multi-wing centrifugal machine impeller for automobile |
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| Publication Number | Publication Date |
|---|---|
| CN114658685A true CN114658685A (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210469175.1A Pending CN114658685A (en) | 2022-04-30 | 2022-04-30 | Multi-wing centrifugal machine impeller for automobile |
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| Country | Link |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240590A (en) * | 1999-02-23 | 2000-09-05 | Hitachi Ltd | Multiblade forward fan |
| JP2010090835A (en) * | 2008-10-09 | 2010-04-22 | Mitsubishi Heavy Ind Ltd | Multi-blade centrifugal fan and air conditioner using the same |
| KR20140037576A (en) * | 2012-09-19 | 2014-03-27 | 한라비스테온공조 주식회사 | Blower fan of air conditioning system for automotive vehicles |
| CN208417055U (en) * | 2018-06-01 | 2019-01-22 | 珠海格力电器股份有限公司 | Centrifugal fan blade and air purification equipment |
| CN110319054A (en) * | 2019-05-30 | 2019-10-11 | 宁波方太厨具有限公司 | A kind of impeller for forward centrifugal blower |
| US20190338782A1 (en) * | 2018-05-02 | 2019-11-07 | Regal Beloit America, Inc. | High efficiency forward curved impeller and method for assembling the same |
| CN112377457A (en) * | 2020-10-13 | 2021-02-19 | 宁波方太厨具有限公司 | Impeller, centrifugal fan applying same and range hood |
| CN113710899A (en) * | 2019-04-25 | 2021-11-26 | 三菱电机株式会社 | Impeller, multi-wing blower and air conditioning device |
-
2022
- 2022-04-30 CN CN202210469175.1A patent/CN114658685A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000240590A (en) * | 1999-02-23 | 2000-09-05 | Hitachi Ltd | Multiblade forward fan |
| JP2010090835A (en) * | 2008-10-09 | 2010-04-22 | Mitsubishi Heavy Ind Ltd | Multi-blade centrifugal fan and air conditioner using the same |
| KR20140037576A (en) * | 2012-09-19 | 2014-03-27 | 한라비스테온공조 주식회사 | Blower fan of air conditioning system for automotive vehicles |
| US20190338782A1 (en) * | 2018-05-02 | 2019-11-07 | Regal Beloit America, Inc. | High efficiency forward curved impeller and method for assembling the same |
| CN208417055U (en) * | 2018-06-01 | 2019-01-22 | 珠海格力电器股份有限公司 | Centrifugal fan blade and air purification equipment |
| CN113710899A (en) * | 2019-04-25 | 2021-11-26 | 三菱电机株式会社 | Impeller, multi-wing blower and air conditioning device |
| CN110319054A (en) * | 2019-05-30 | 2019-10-11 | 宁波方太厨具有限公司 | A kind of impeller for forward centrifugal blower |
| CN112377457A (en) * | 2020-10-13 | 2021-02-19 | 宁波方太厨具有限公司 | Impeller, centrifugal fan applying same and range hood |
| WO2022077585A1 (en) * | 2020-10-13 | 2022-04-21 | 宁波方太厨具有限公司 | Impeller, centrifugal fan using impeller, and rangehood |
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