CN203906384U - Axial flow impeller of Bezier mean camber line twisted blade with low rotating speed and high pressure ratio - Google Patents
Axial flow impeller of Bezier mean camber line twisted blade with low rotating speed and high pressure ratio Download PDFInfo
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- CN203906384U CN203906384U CN201320432205.8U CN201320432205U CN203906384U CN 203906384 U CN203906384 U CN 203906384U CN 201320432205 U CN201320432205 U CN 201320432205U CN 203906384 U CN203906384 U CN 203906384U
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- 230000004323 axial length Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 11
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 2
- 230000003137 locomotive effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000008676 import Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of a draught fan and especially relates to an impeller of an axial flow fan. An axial flow impeller of a Bezier mean camber line twisted blade with low rotating speed and high pressure ratio comprises a hub and blades. The axial flow impeller is characterized in that a mean camber line in a blade shape is a secondary triangular Bezier curve based on three points; the blades are not overlapped at the root; and an installation angle of each blade root is 49-53-degree. With the secondary triangular Bezier curve-shaped blades based on three points, the installation angle and a ratio of a blade tip chord length to a blade root chord length, high static pressure in limited space can be provided; the axial flow impeller is characterized by compact structure; and cooling ventilation can be achieved.
Description
Technical field
The utility model belongs to blower fan technical field, particularly relates to a kind of axial fan impeller.
Background technique
Domestic locomotive high-speed overload, increases locomotive internally-powered equipment heating amount.For guaranteeing locomotive driving safety, the requirement of the forced convection ventilation system to locomotive internal heat generation parts improves constantly.At present, to the core component of its cooling system---cooling fan, dependence on import mostly.But the cost of import blower fan is high, procurement cycle is long, and the problem such as inconvenient maintenance makes the production domesticization of locomotive cooling blower become problem demanding prompt solution.Locomotive traction system has the features such as power is large, heater element is many, requires cooling blower to have higher static pressure liter; Limited by the motor car confined space, require the outside dimension of blower fan little.Therefore, locomotive traction system cooling blower should have the feature of compact structure, meets again harsh cooling channel requirement, has greatly increased design difficulty.
The electricity consumption frequency of China is lower, causes motor-driven rotation speed of fan also lower.Reduce at rotating speed, under constant, the non-overloading harsh conditions of power of boundary dimension, carry out the localization Design of import blower fan, keep higher outlet static pressure to there is higher design difficulty.Because operating conditions changes, the flow reduction of blower fan, and axial-flow blower is suitable for and large flow condition, ensure that stall and surge do not occur under small flow for it, and there is higher efficiency and export static pressure extremely difficult especially.The core component of ventilator is impeller, and the production domesticization of draught fan impeller is depended in the production domesticization of blower fan very major part.
Summary of the invention
For addressing the above problem, the utility model provides a kind of slow-speed of revolution high pressure ratio Bezier mean camber line strong twisted blade axial-flow blower, can be in limited space for the parts such as transformer to be cooled carry out coolingly, be specially adapted to the cooling fan in high-speed heavy loading locomotive.
For reaching above-mentioned purpose, the utility model provides a kind of slow-speed of revolution high pressure ratio Bezier mean camber line strong twisted blade axial-flow blower, comprise wheel hub and blade, it is characterized in that: the mean camber line of described vane foil is the secondary triangle Bezier based on 3, described blade is not overlapping at blade root place, 49 °-53 ° of blade root established angles.
Described blade and blade top established angle is 7-9 °.
Described blade root place axial length is the longest, and blade root place axial length is 220mm-230mm.
Described blade and blade top chord length is 1.09-1.13 with blade root chord length ratio.
Described blade root chord length 285mm-290mm.
The long 318mm-322mm of described blade and blade top chord.
Described blade has 9-11 sheet, and blade is uniformly distributed along circumference of hub.
Described blade blade tip clearance is 2mm-5mm.
A kind of propeller fan, described propeller fan comprises: strong twisted blade axial-flow blower, suction chamber, exhaustion section, drive motor, dunnage, suction chamber and the middle dunnage that is fixedly connected with of exhaustion section, in the middle of support ring, be fixedly connected with strong twisted blade axial-flow blower, in suction chamber, be fixedly connected with drive motor, drive motor connects strong twisted blade axial-flow blower by coupling, and exhaustion section exhaust outlet place is fixedly connected with thing to be cooled.
Use the utility model successful: the utility model provides a kind of slow-speed of revolution high pressure ratio Bezier mean camber line strong twisted blade axial-flow blower, be based on 3 blade, design and installation angle and the leaf top chord length of secondary triangle Bezier and ratios of blade root chord length that shape is adjustable by the mean camber line redesigning, higher static pressure liter is provided in limited little space, both there is the feature of compact structure, met again cooling channel requirement.
Brief description of the drawings
Fig. 1 is axle geodesic structure schematic diagram of the present utility model.
Fig. 2 is main TV structure schematic diagram of the present utility model.
Fig. 3 is meridian plane structural representation of the present utility model.
Fig. 4 is the long-pending folded rule schematic diagram of blade variable cross section of the present utility model.
Fig. 5 is intake and exhaust casing schematic diagram of the present utility model.
Fig. 6 is that propeller fan is specifically applied schematic diagram.
Fig. 7 is the blade Line Chart that the present invention makes according to Bezier mean camber line.
In figure: 1-blade root cross section molded line, 2-0.5 leaf eminence blade profile molded line, 3-leaf top section molded line, 4-suction chamber, 5-exhaustion section, 6-drive motor, 7-dunnage, 8-transformer, 9-blade angle, 10-blade profile leading edge direction angle, 11-blade profile trailing edge direction angle to be cooled.
Embodiment
embodiment 1
The utility model provides a kind of novel slow-speed of revolution high pressure ratio Bezier mean camber line strong twisted blade axial-flow blower, and hub diameter is 525-535mm, and blade height is 230-238mm, adopt the 9-11 sheet Bezier strong twisted blade of mean camber line variable cross section and distribute along even circumferential, blade and wheel hub adopt cast inblock design, and smooth treatment is carried out in surface, ensure surface roughness, the axial length of blade is longer, is 220-230mm, has increased the chord length of blade in the confined space, blade root chord length 285-290mm, and the long 318-322mm of leaf top chord, has increased effective acting area of blade, thereby has been issued to relatively high pressure ratio in the slow-speed of revolution, for making large chord length blade not overlapping at blade root place, blade root adopts larger established angle, is 49-53 °, degree of reaction increases along the high direction of leaf, and the acting ability that makes full use of leaf top makes its more effective static pressure liter that is converted into, and leaf top established angle is 7-9 °, the mean camber line of blade profile is that the secondary triangle Bezier based on 3 is that shape is adjustable, the mean camber line of its blade profile can be as required or the change of other data adjust shape, its describing mode as shown in Figure 7, by the blade angle 9 shown in figure, blade profile leading edge direction angle 10, blade profile trailing edge direction angle 11 is described this secondary Bezier, this curve both can have been expressed the front and rear edge direction angle of blade, and then express the bending angle of blade profile, can express again the established angle of blade, facilitate parametric modeling and optimal design, and make blade more meet flowing law, impeller is tending towards without swirl flow, improve impeller adiabatic efficiency, 3 angles are respectively 38-40 ° at blade root place, 17-18 ° and 27-28 °, 0.5 leaf eminence is respectively 59-61 °, 16-17 ° and 36-67 °, be respectively 81-82 ° at Ye Dingchu, 15-16 ° and 44-46 °, blade integral adopts and becomes circular rector design, and the air-flow deflection angle at leaf top place is large, between 60-65 °, the air-flow deflection angle at blade root place is little, between 40-45 °, make like this boosting capability of blade increase along the high direction of leaf, the circumferential speed that makes full use of Ye Ding great is realized its boosting capability, add function power for what further utilize leaf top, and consider its Security, impeller blade adopts the less blade tip clearance of 2-5mm, for meeting casting technique and requirement of strength, blade and wheel hub joint rounding, chamfering radius 12-15mm, this impeller is applicable to small flow axial-flow blower, and at normal temperature and pressure, the slow-speed of revolution of 1450rpm, under the small flow of 7.5m3/s, can reach the static pressure liter of 1350-1400Pa.
embodiment 2
As shown in Fig. 2-Fig. 4, the strong twisted blade axial-flow blower of novel slow-speed of revolution high pressure ratio Bezier mean camber line of the present utility model.Hub diameter 265mm, impeller outer diameter 500mm, adopts 10 strong twisted blades of Bezier mean camber line variable cross section and distributes along even circumferential, and blade and wheel hub adopt cast inblock design, and smooth treatment is carried out in surface, ensure surface roughness; Blade root section type line 1,0.5 leaf eminence blade profile molded line 2, leaf top section molded line 3 each height blade profile molded line for obtaining after optimizing in Fig. 4; For meeting casting technique and requirement of strength, blade and wheel hub joint rounding, chamfering radius 13mm; The axial length 223.55mm of blade, blade root chord length 286.8mm, the long 319.5mm of leaf top chord, blade root established angle is 50.9 °; Leaf top established angle is 8.8 °; The secondary Bezier of the mean camber line of blade profile, 3 angles shown in Fig. 7 are respectively 39.15 ° at blade root place, and 17.5 ° and 27.5 °, 0.5 leaf eminence is respectively 60.15 °, 16.5 ° and 36.25 °, is respectively 81.14 °, 15.5 ° and 45 ° at Ye Dingchu; Blade integral adopts and becomes circular rector design, 60.5 ° of the air-flow deflection angles at leaf top place, 45 ° of the air-flow deflection angles at blade root place, impeller blade blade tip clearance 2mm; This impeller is applicable to small flow axial-flow blower, and at normal temperature and pressure, the slow-speed of revolution of 1450rpm, under the small flow of 7.5m3/s, can reach static pressure and rise 1361Pa, isentropic efficiency 87%, and wasted work rate is 16.9kw.
When concrete enforcement, form flow passage component by casing, as shown in Figure 5.By intake duct 4 and 5 one-tenth of exhaustion section groups, the utility model assembling is in the middle of intake duct 4 and exhaustion section 5.
As shown in Figure 6, for the utility model is locomotive traction motor transformer Cooling.The utility model blower fan drives with drive motor 6, and motor is placed in the dunnage 7 of intake duct central authorities, connects the utility model impeller below by coupling.Gas enters impeller by suction chamber 4, enters transformer to be cooled 8 and carry out cooling to it in impeller after supercharging after exhaustion section 5 by kinetic transformation is further pressure energy.
Claims (9)
1. the strong twisted blade axial-flow blower of slow-speed of revolution high pressure ratio Bezier mean camber line, comprise wheel hub and blade, it is characterized in that: the mean camber line of described vane foil is the secondary triangle Bezier based on 3, and described blade is not overlapping at blade root place 49 °-53 ° of blade root established angles.
2. the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line according to claim 1, is characterized in that: described blade and blade top established angle is 7-9 °.
3. the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line according to claim 1, is characterized in that: described blade root place axial length is the longest, and blade root place axial length is 220mm-230mm.
4. the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line according to claim 1, is characterized in that: described blade and blade top chord length is 1.09-1.13 with blade root chord length ratio.
5. the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line according to claim 1, is characterized in that: described blade root chord length 285mm-290mm.
6. the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line according to claim 1, is characterized in that: the long 318mm-322mm of described blade and blade top chord.
7. according to the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line described in claim 2-6 any one, it is characterized in that: described blade has 9-11 sheet, and blade is uniformly distributed along circumference of hub.
8. the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line according to claim 7, is characterized in that: described blade blade tip clearance is 2mm-5mm.
9. a kind of propeller fan of the strong twisted blade axial-flow blower of a kind of slow-speed of revolution high pressure ratio Bezier mean camber line described in employing claim 1, it is characterized in that: described propeller fan comprises: strong twisted blade axial-flow blower, suction chamber, exhaustion section, drive motor, dunnage, suction chamber and the middle dunnage that is fixedly connected with of exhaustion section, in the middle of support ring, be fixedly connected with strong twisted blade axial-flow blower, the mean camber line of described vane foil is the secondary triangle Bezier based on 3, described blade is not overlapping at blade root place, 49 °-53 ° of blade root established angles, in suction chamber, be fixedly connected with drive motor, drive motor connects strong twisted blade axial-flow blower by coupling, exhaustion section exhaust outlet place is fixedly connected with thing to be cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320432205.8U CN203906384U (en) | 2013-07-20 | 2013-07-20 | Axial flow impeller of Bezier mean camber line twisted blade with low rotating speed and high pressure ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320432205.8U CN203906384U (en) | 2013-07-20 | 2013-07-20 | Axial flow impeller of Bezier mean camber line twisted blade with low rotating speed and high pressure ratio |
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| CN203906384U true CN203906384U (en) | 2014-10-29 |
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| CN201320432205.8U Expired - Fee Related CN203906384U (en) | 2013-07-20 | 2013-07-20 | Axial flow impeller of Bezier mean camber line twisted blade with low rotating speed and high pressure ratio |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398021A (en) * | 2013-07-20 | 2013-11-20 | 大连理工大学 | Low-speed high-pressure-ratio axial-flow impeller with highly twisted blades having Bezier camber lines |
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2013
- 2013-07-20 CN CN201320432205.8U patent/CN203906384U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398021A (en) * | 2013-07-20 | 2013-11-20 | 大连理工大学 | Low-speed high-pressure-ratio axial-flow impeller with highly twisted blades having Bezier camber lines |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20200720 |
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| CF01 | Termination of patent right due to non-payment of annual fee |