CN110685956A - Fan blade with unequal outer diameters - Google Patents
Fan blade with unequal outer diameters Download PDFInfo
- Publication number
- CN110685956A CN110685956A CN201911044382.7A CN201911044382A CN110685956A CN 110685956 A CN110685956 A CN 110685956A CN 201911044382 A CN201911044382 A CN 201911044382A CN 110685956 A CN110685956 A CN 110685956A
- Authority
- CN
- China
- Prior art keywords
- blade
- blades
- motor shell
- fan blade
- fan
- 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.)
- Pending
Links
- 239000007787 solid Substances 0.000 claims description 4
- 241000883990 Flabellum Species 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F04D29/66—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
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 fan blade with unequal outer diameters, which comprises a motor shell and blades, wherein a plurality of blades extend outwards from the outer side wall of the circumference of the motor shell, the distance from the end surface of each blade to the center of the motor shell is different.
Description
Technical Field
The invention relates to a fan, in particular to fan blades with unequal outer diameters.
Background
In general fan blade designs, the outermost ends of the blades are at the same diameter. The air sweeping quantity of each blade of the fan blade is the same, so that energy under certain frequency is easily concentrated to generate larger noise, and troubles are caused when the fan blade is used in a quiet environment.
Disclosure of Invention
In order to overcome the defects, the invention provides the fan blades with unequal outer diameters, and the fan blades with unequal outer diameters greatly reduce the noise generated by the operation of the fan.
The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides an external diameter flabellum varies, includes motor shell and blade, and a plurality of blades outwards extend from motor shell circumference lateral wall, the distance that every blade terminal surface to motor shell center is different.
As a further improvement of the invention, the length of each blade on the outer side of the circumference of the motor shell fluctuates in length along a sine curve-shaped wavy line within a set range.
As a further improvement of the invention, the fluctuation value of the blade length of one circle of the motor shell at least forms two groups of sine curve-shaped wavy lines.
As a further development of the invention, the respective blade ends are located on a ring concentric with the motor housing, the diameter of which ring is calculated as follows:
wherein:
a is the diameter of a ring where the end part of a reference blade designed by the fan blade is located;
n is the total number of blades on the fan blade;
n is the 1 st to the N blades;
x is the group number of the peak values of the blades on the sine curve-shaped wavy line formed by the distribution of one circle of the fan blades.
As a further improvement of the invention, the motor is further provided with a fixed ring, the fixed ring is arranged concentrically with the motor shell, and the side wall of each blade is fixedly connected with the fixed ring.
As a further improvement of the invention, the blades are in a spiral outward radiation structure and are uniformly distributed on the outer side wall of the motor shell.
The invention has the beneficial effects that: the blades in the circle of the fan blade are designed into structures with different lengths, the length of each blade fluctuates within a certain range according to the quasi-sinusoidal wave line, so that the fan blade can keep balance when in operation, the wind sweeping vibration frequency of the blades is kept consistent, the wind sweeping areas of the blades are different, energy concentration under single frequency is avoided, noise generated by fan operation is greatly reduced, the lengths of the blades can be calculated according to a formula, the obtained lengths of the blades are different and are uniformly distributed, and the operation balance of the fan is kept.
Drawings
FIG. 1 is a front view of a first construction of the present invention;
FIG. 2 is a data diagram of the first embodiment;
FIG. 3 is a data diagram of a second embodiment;
FIG. 4 is a front view of a second construction of the present invention;
fig. 5 is a rear view of a second configuration of the present invention.
Detailed Description
Example (b): the utility model provides an external diameter flabellum varies, includes motor shell 2 and blade 1, and a plurality of blades 1 outwards extend from 2 circumference lateral walls of motor shell, the distance of 1 terminal surface of every blade to motor shell center is different.
Because the length of each blade 1 is different, the wind sweeping area of each blade 1 is different, and the wind sweeping area variation of each blade 1 is not too large to cause unbalanced operation by controlling the length difference of the blades 1 to change in a smaller range, so that balanced operation can be kept, energy concentration under a single frequency can be avoided, and noise generated by fan operation is greatly reduced.
The length of each blade 1 on the outer side of the circumference of the motor shell 2 fluctuates along a sine curve-shaped wavy line within a set range. A reference value is designed on the length of the fan blade 1, the length of each fan blade 1 fluctuates in a certain range above and below the reference value, and the fluctuation value forms a wavy line shape relative to the reference value, so that the fan blades of the fan are balanced in the running process of the fan.
The length fluctuation value of the blades 1 at one circle of the motor shell 2 at least forms two groups of sine curve-shaped wavy lines. Through the distribution state of a plurality of groups of sine curve-shaped wavy lines, the length fluctuation of the blades 1 forms uniform balanced state distribution, and the running stability of the fan is greatly improved.
The ends of the individual blades 1 are each located on a circular ring concentric with the motor housing 2, the diameter of which is calculated as:
wherein:
a is the diameter of a ring where the end part of a reference blade designed by the fan blade is located;
n is the total number of blades on the fan blade;
n is the 1 st to the N blades;
x is the group number of the peak values of the blades on the sine curve-shaped wavy line formed by the distribution of one circle of the fan blades.
Still be equipped with solid fixed ring 3, gu fixed ring 3 sets up with motor shell 2 is concentric, and 1 lateral wall of each blade all links firmly with solid fixed ring 3. The fixed ring 3 is connected with each blade 1 side wall, the strength of the blade 1 is greatly enhanced, the blade 1 is prevented from being deformed and broken and damaged, the fixed ring 3 is close to each blade 1 end as much as possible, the blade 1 is long in length and can extend out of the fixed ring 3 for a certain distance, and the end part of the blade 1 which is short in length is just aligned with the fixed ring 3.
The blades 1 are of a spiral outward radiation structure and are uniformly distributed on the outer side wall of the motor shell 2. The fan obtains a larger air sweeping area in a smaller range, and then forms stronger air quantity, and the structure can gather air and has higher strength.
Example 1: a reference blade having a diameter of 40mm and a number of 61 blades has the following blade length:
example 2: a reference blade with 40mm diameter and 37 blades has the following blade length:
| basic diameter | A | 40 |
| Number of blades | N | 37 |
| Number of Sine | |
3 |
| Blade number | Increment of | Outer diameter of blade Phin |
| 1 | 0.22 | 40.22 |
| 2 | 0.58 | 40.58 |
| 3 | 0.73 | 40.73 |
| 4 | 0.62 | 40.62 |
| 5 | 0.29 | 40.29 |
| 6 | -0.18 | 39.82 |
| 7 | -0.68 | 39.32 |
| 8 | -1.07 | 38.93 |
| 9 | -1.26 | 38.74 |
| 10 | -1.20 | 38.80 |
| 11 | -0.90 | 39.10 |
| 12 | -0.44 | 39.56 |
| 13 | 0.06 | 40.06 |
| 14 | 0.48 | 40.48 |
| 15 | 0.71 | 40.71 |
| 16 | 0.69 | 40.69 |
| 17 | 0.42 | 40.42 |
| 18 | -0.01 | 39.99 |
| 19 | -0.52 | 39.48 |
| 20 | -0.96 | 39.04 |
| 21 | -1.22 | 38.78 |
| 22 | -1.25 | 38.75 |
| 23 | -1.02 | 38.98 |
| 24 | -0.61 | 39.39 |
| 25 | -0.11 | 39.89 |
| 26 | 0.35 | 40.35 |
| 27 | 0.65 | 40.65 |
| 28 | 0.72 | 40.72 |
| 29 | 0.54 | 40.54 |
| 30 | 0.15 | 40.15 |
| 31 | -0.35 | 39.65 |
| 32 | -0.82 | 39.18 |
| 33 | -1.16 | 38.84 |
| 34 | -1.27 | 38.73 |
| 35 | -1.13 | 38.87 |
| 36 | -0.77 | 39.23 |
| 37 | -0.28 | 39.72 |
Claims (6)
1. The utility model provides an external diameter flabellum varies, includes motor shell and blade, and a plurality of blades (1) outwards extend its characterized in that from motor shell (2) circumference lateral wall: the distance from the end face of each blade to the center of the motor shell is different.
2. The unequal outer diameter fan blade of claim 1, wherein: the length of each blade on the outer side of the circumference of the motor shell fluctuates along the length of a sine curve-shaped wavy line within a set range.
3. The unequal outer diameter fan blade of claim 2, wherein: the blade length fluctuation value of one circle of the motor shell at least forms two groups of sine curve-shaped wavy lines.
4. The unequal outer diameter fan blade of claim 2, wherein: the ends of the blades are respectively arranged on a circular ring concentric with the motor shell, and the diameter of the circular ring is calculated according to the following formula:
wherein:
a is the diameter of a ring where the end part of a reference blade designed by the fan blade is located;
n is the total number of blades on the fan blade;
n is the 1 st to the N blades;
x is the group number of the peak values of the blades on the sine curve-shaped wavy line formed by the distribution of one circle of the fan blades.
5. The unequal outer diameter fan blade of claim 1, wherein: still be equipped with solid fixed ring (3), gu fixed ring sets up with the motor shell is concentric, and each blade lateral wall all links firmly with solid fixed ring.
6. The unequal outer diameter fan blade of claim 1, wherein: the blades are of a spiral outward radiation structure and are uniformly distributed on the outer side wall of the motor shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044382.7A CN110685956A (en) | 2019-10-30 | 2019-10-30 | Fan blade with unequal outer diameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044382.7A CN110685956A (en) | 2019-10-30 | 2019-10-30 | Fan blade with unequal outer diameters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110685956A true CN110685956A (en) | 2020-01-14 |
Family
ID=69114926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911044382.7A Pending CN110685956A (en) | 2019-10-30 | 2019-10-30 | Fan blade with unequal outer diameters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110685956A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396371A (en) * | 2020-03-24 | 2020-07-10 | 联想(北京)有限公司 | Fan and electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06193401A (en) * | 1992-12-24 | 1994-07-12 | Hitachi Ltd | Turbine wheel |
| JP2013130150A (en) * | 2011-12-22 | 2013-07-04 | Yaichi Obara | Suction compression high-pressure blower |
| CN105351219A (en) * | 2015-11-26 | 2016-02-24 | 联想(北京)有限公司 | Fan device and electronic device |
| US20170002836A1 (en) * | 2015-07-02 | 2017-01-05 | Apple Inc. | Fan having a blade assembly with different chord lengths |
| CN206617363U (en) * | 2017-03-01 | 2017-11-07 | 讯凯国际股份有限公司 | Impeller |
| CN206943083U (en) * | 2017-03-31 | 2018-01-30 | 中达电子零组件(吴江)有限公司 | Centrifugal fan and its impeller |
| US20180066667A1 (en) * | 2016-09-06 | 2018-03-08 | Macroair Technologies, Inc. | Low aspect ratio fan |
| CN109707647A (en) * | 2017-10-26 | 2019-05-03 | 台达电子工业股份有限公司 | Fan |
| CN211288224U (en) * | 2019-10-30 | 2020-08-18 | 太仓市华盈电子材料有限公司 | Fan blade with unequal outer diameters |
-
2019
- 2019-10-30 CN CN201911044382.7A patent/CN110685956A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06193401A (en) * | 1992-12-24 | 1994-07-12 | Hitachi Ltd | Turbine wheel |
| JP2013130150A (en) * | 2011-12-22 | 2013-07-04 | Yaichi Obara | Suction compression high-pressure blower |
| US20170002836A1 (en) * | 2015-07-02 | 2017-01-05 | Apple Inc. | Fan having a blade assembly with different chord lengths |
| CN105351219A (en) * | 2015-11-26 | 2016-02-24 | 联想(北京)有限公司 | Fan device and electronic device |
| US20180066667A1 (en) * | 2016-09-06 | 2018-03-08 | Macroair Technologies, Inc. | Low aspect ratio fan |
| CN206617363U (en) * | 2017-03-01 | 2017-11-07 | 讯凯国际股份有限公司 | Impeller |
| CN206943083U (en) * | 2017-03-31 | 2018-01-30 | 中达电子零组件(吴江)有限公司 | Centrifugal fan and its impeller |
| CN109707647A (en) * | 2017-10-26 | 2019-05-03 | 台达电子工业股份有限公司 | Fan |
| CN211288224U (en) * | 2019-10-30 | 2020-08-18 | 太仓市华盈电子材料有限公司 | Fan blade with unequal outer diameters |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396371A (en) * | 2020-03-24 | 2020-07-10 | 联想(北京)有限公司 | Fan and electronic equipment |
| CN111396371B (en) * | 2020-03-24 | 2021-06-15 | 联想(北京)有限公司 | Fan and electronic equipment |
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