CN102287401A - Arc plate blade with ladder-shaped variable thicknesses - Google Patents
Arc plate blade with ladder-shaped variable thicknesses Download PDFInfo
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- CN102287401A CN102287401A CN2011102321624A CN201110232162A CN102287401A CN 102287401 A CN102287401 A CN 102287401A CN 2011102321624 A CN2011102321624 A CN 2011102321624A CN 201110232162 A CN201110232162 A CN 201110232162A CN 102287401 A CN102287401 A CN 102287401A
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- 230000008719 thickening Effects 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 230000002459 sustained effect Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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Abstract
The invention relates to an arc plate blade with ladder-shaped variable thicknesses. The arc plate blade comprises a basic layer and a thickening layer, wherein the thickening layer is formed on the basis of the basic layer with the same thickness, the thickness of the blade is thickened step by step from top to root, the thickness values appear as a ladder shape, and the arc plate blades are uniformly distributed on the hub of the fan impeller. In the invention, when the impeller is running, load-stress on a unit area cannot be continuously increased when load on each section of the blade from top to root is continuously increased, thus fractures caused by excessive stress on the root of the blade in the running of the impeller can be prevented. The arc plate blade provided by the invention can be applied to an axial-flow type ventilator, especially for the axial-flow type ventilator with a large-diameter high-speed impeller.
Description
Affiliated technical field
The invention belongs to field of fluid machinery, relate to a kind of blade of propeller fan.
Background technique
Blower fan be will rotation mechanical energy convert gas pressure energy and kinetic energy to, and the general machinery equipment that gas delivery is gone out; Propeller fan converts the mechanical energy of rotation to gas pressure energy and kinetic energy, and gas is axially introduced by blower fan and the machinery from axially transferring out.Impeller is the critical component of the realization mechanical energy conversion of blower fan, is made up of blade and wheel hub.The blade profile of blade has wing blade and circular arc plate shape.
Known circular arc plate blade is a uniform thickness, i.e. consistency of thickness on any cross section of whole blade from the root to the top.When fan operation, blade high speed rotating, blade are subjected to the effect of a plurality of power such as centrifugal force, aerodynamic force, gravity.Under the comprehensive function of these power, stressed continuing to increase on the leaf cross-section from the top to the root, because of vane thickness constant, cause the stressed-stress on the unit area from the top to the root to continue to increase, stress minimum on the cross section of top as a result, big more near its stress of root more, the stress maximum on the root cross section (even the chord length of root increases to some extent than the bigger cross-section area that makes in top, normally result is still so).Therefore, blade ruptures at root easily, and is especially big at impeller diameter, rupture at root easily when rotating speed is high.
The leaf destruction problem of this situation can not solve by the method that strengthens whole blade thickness, because after the whole blade thickening, its quality increases, the centrifugal force that plays a major role increases in proportion, and the stress on the cross section is almost constant as a result.Therefore, general by changing blade material (adopting the material that intensity is higher or density is littler) or use wing blades instead and deal with problems, but this can increase product cost or increasing manufacture difficulty.
Summary of the invention
In order to overcome the deficiency of existing circular arc plate blade, the invention provides a kind of circular arc plate blade, this blade stress on each cross section from the top to the root does not continue to increase, and has avoided the stress from the top to the root progressively to strengthen, and the phenomenon from the root fracture when causing impeller operation takes place.
The present invention solves the technological scheme that its problem adopts: blade pass is crossed welding, riveted joint, mode such as bonding is connected with wheel hub, blade profile is a circular arc plate, but the thickness of blade changes from the top to the root stepped shaft, the thickness at top is little, the thickness of root is big, and its thickness is stepped increase with stressed increase.Because of from the top to the root cross section in the stressed increase, the stepped increase of cross-section area, thereby the stress on each cross section is not continued to increase, and the existing circular arc plate blade of the stress ratio of root of blade significantly reduces, and reaches the purpose that impeller diameter is big, do not rupture when rotating speed is high.
The invention has the beneficial effects as follows, the blade that has solved the circular arc plate blade profile is easy to take place from root the problem of fracture, can be under the prerequisite that does not improve Material Strength, adopt the circular arc plate blade on the impeller big at impeller diameter, that rotating speed is high, have that the cost of material is low, make easy characteristics.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is an axial fan impeller with existing circular arc plate leaf production.
Fig. 2 is first embodiment of circular arc plate blade that the thickness stepped shaft changes.
Fig. 3 is first embodiment's of circular arc plate blade of thickness stepped shaft variation a partial enlarged drawing.
Fig. 4 is the 3rd embodiment of circular arc plate blade that the thickness stepped shaft changes.
Fig. 5 is the 3rd embodiment's of circular arc plate blade of thickness stepped shaft variation a partial enlarged drawing.
Among the figure: 1. wheel hub, 2. blade, the 3. basic layer of blade, 4. the blade thickening layer one, and 5. the blade thickening layer two.
Embodiment
Embodiment 6, and vane thickness of the present invention forms the 4th kind of situation of three grades of ladders.Arrange by the order that is blade thickening layer two (5), blade thickening layer one (4), the basic layer of blade (3) from left to right, all the other are with embodiment 3.
By that analogy, vane thickness of the present invention can also form the ladder of level Four or more multistage number.
Claims (8)
1. the circular arc plate blade that changes of a thickness stepped shaft, it is uniformly distributed on the wheel hub of draught fan impeller, it is characterized in that: the thickness of blade changes from the top to the root stepped shaft, and the thickness at top is little, and the thickness of root is big.
2. the circular arc plate blade that thickness stepped shaft according to claim 1 changes, it is characterized in that: blade is made up of with thickening layer basic layer, the root of each layer is positioned on the same hub diameter, overhead height has nothing in common with each other, basic layer is the highest, thickening layer progressively increases from the top to the root with the thickness sum of basic layer, forms ladder.
3. the circular arc plate blade that thickness stepped shaft according to claim 1 and 2 changes, it is characterized in that: whole blade is processed by a whole block material.
4. the circular arc plate blade that thickness stepped shaft according to claim 1 and 2 changes, it is characterized in that: whole blade is welded by the polylith material.
5. the circular arc plate blade that thickness stepped shaft according to claim 1 and 2 changes is characterized in that: whole blade is formed by the riveted joint of polylith material.
6. the circular arc plate blade that thickness stepped shaft according to claim 1 and 2 changes, it is characterized in that: whole blade is formed by the polylith material adhesive.
7. require the circular arc plate blade of each described thickness stepped shaft variation according to aforesaid right, it is characterized in that: the shape of blade is twisted, and the established angle of root of blade is greater than the established angle of vane tip.
8. require the circular arc plate blade of each described thickness stepped shaft variation according to aforesaid right, it is characterized in that: the blade profile of basic layer and thickening layer such as is at thick circular plate, identical with blade profile thickness on the sustained height from the root to the top that thickening layer is combined into by basic layer, the blade profile of whole blade still is a circular arc plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232162 CN102287401B (en) | 2011-08-03 | 2011-08-03 | Arc plate blade with ladder-shaped variable thicknesses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232162 CN102287401B (en) | 2011-08-03 | 2011-08-03 | Arc plate blade with ladder-shaped variable thicknesses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102287401A true CN102287401A (en) | 2011-12-21 |
| CN102287401B CN102287401B (en) | 2013-02-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110232162 Expired - Fee Related CN102287401B (en) | 2011-08-03 | 2011-08-03 | Arc plate blade with ladder-shaped variable thicknesses |
Country Status (1)
| Country | Link |
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| CN (1) | CN102287401B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287959A (en) * | 2016-08-17 | 2017-01-04 | 芜湖美智空调设备有限公司 | Stator blade wind wheel, cabinet air-conditioner and air-conditioner |
| CN106678002A (en) * | 2016-11-28 | 2017-05-17 | 哈尔滨工大金涛科技股份有限公司 | Wind turbine blade and blade machining method |
| CN110118197A (en) * | 2018-02-07 | 2019-08-13 | 广东美的制冷设备有限公司 | Axial-flow windwheel and air conditioner |
| CN110966254A (en) * | 2018-09-28 | 2020-04-07 | 通用电气公司 | Metallic compliant tip fan blade |
| CN111274655A (en) * | 2020-01-18 | 2020-06-12 | 江苏大学 | Optimization design method for arc plate blade of frost prevention machine |
| CN111720348A (en) * | 2020-06-18 | 2020-09-29 | 八环科技集团股份有限公司 | Special turbine fan for breathing machine and impeller machining process |
| US10920607B2 (en) | 2018-09-28 | 2021-02-16 | General Electric Company | Metallic compliant tip fan blade |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2144724Y (en) * | 1992-11-25 | 1993-10-27 | 廖忠义 | Multistage ladder type blade structure for ceiling fan |
| WO2002075159A1 (en) * | 2001-03-15 | 2002-09-26 | Arçelik A.S. | Axial fan |
| CN2767723Y (en) * | 2005-01-14 | 2006-03-29 | 威海克莱特菲尔风机有限公司 | Axial flow fan having hyperboloidal sweepforward blade with knifes on surface |
| CN1804407A (en) * | 2002-06-25 | 2006-07-19 | 台达电子工业股份有限公司 | Heat radiation fan |
-
2011
- 2011-08-03 CN CN 201110232162 patent/CN102287401B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2144724Y (en) * | 1992-11-25 | 1993-10-27 | 廖忠义 | Multistage ladder type blade structure for ceiling fan |
| WO2002075159A1 (en) * | 2001-03-15 | 2002-09-26 | Arçelik A.S. | Axial fan |
| CN1804407A (en) * | 2002-06-25 | 2006-07-19 | 台达电子工业股份有限公司 | Heat radiation fan |
| CN2767723Y (en) * | 2005-01-14 | 2006-03-29 | 威海克莱特菲尔风机有限公司 | Axial flow fan having hyperboloidal sweepforward blade with knifes on surface |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287959A (en) * | 2016-08-17 | 2017-01-04 | 芜湖美智空调设备有限公司 | Stator blade wind wheel, cabinet air-conditioner and air-conditioner |
| CN106287959B (en) * | 2016-08-17 | 2022-03-22 | 芜湖美智空调设备有限公司 | Quiet leaf wind wheel, cabinet air conditioner and air conditioner |
| CN106678002A (en) * | 2016-11-28 | 2017-05-17 | 哈尔滨工大金涛科技股份有限公司 | Wind turbine blade and blade machining method |
| CN106678002B (en) * | 2016-11-28 | 2023-10-20 | 哈尔滨工大金涛科技股份有限公司 | Wind turbine blade and blade processing method |
| CN110118197A (en) * | 2018-02-07 | 2019-08-13 | 广东美的制冷设备有限公司 | Axial-flow windwheel and air conditioner |
| CN110966254A (en) * | 2018-09-28 | 2020-04-07 | 通用电气公司 | Metallic compliant tip fan blade |
| US10920607B2 (en) | 2018-09-28 | 2021-02-16 | General Electric Company | Metallic compliant tip fan blade |
| CN110966254B (en) * | 2018-09-28 | 2022-03-01 | 通用电气公司 | Metallic compliant tip fan blade |
| US11286807B2 (en) | 2018-09-28 | 2022-03-29 | General Electric Company | Metallic compliant tip fan blade |
| CN111274655A (en) * | 2020-01-18 | 2020-06-12 | 江苏大学 | Optimization design method for arc plate blade of frost prevention machine |
| CN111720348A (en) * | 2020-06-18 | 2020-09-29 | 八环科技集团股份有限公司 | Special turbine fan for breathing machine and impeller machining process |
| CN111720348B (en) * | 2020-06-18 | 2021-06-29 | 八环科技集团股份有限公司 | Special turbine fan for breathing machine and impeller machining process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102287401B (en) | 2013-02-13 |
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Address after: No. 272, Jiaotong Avenue, Xiaonan District, Xiaogan City, Hubei Province, 432000 Patentee after: HUBEI ENGINEERING University Address before: 432000 No. 272, Jiaotong West Road, Xiaogan City, Hubei Province Patentee before: Xiaogan University |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 |