CN202040156U - Resistance reduction and noise reduction device capable of automatically regulating direction - Google Patents
Resistance reduction and noise reduction device capable of automatically regulating direction Download PDFInfo
- Publication number
- CN202040156U CN202040156U CN2011201490955U CN201120149095U CN202040156U CN 202040156 U CN202040156 U CN 202040156U CN 2011201490955 U CN2011201490955 U CN 2011201490955U CN 201120149095 U CN201120149095 U CN 201120149095U CN 202040156 U CN202040156 U CN 202040156U
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- resistance
- resistance reduction
- drag reduction
- pole
- reduction
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- 230000009467 reduction Effects 0.000 title claims abstract description 50
- 230000001105 regulatory effect Effects 0.000 title abstract 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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Abstract
The utility model discloses a resistance reduction and noise reduction device capable of automatically regulating the direction, which comprises an asymmetrical airfoil resistance reduction shell and a rotating device. The asymmetrical airfoil resistance reduction shell is sleeved on the outer periphery of a strut. The rotating device is arranged between the asymmetrical airfoil resistance reduction shell and the strut, so that the asymmetrical airfoil resistance reduction shell can rotate around the strut. The resistance reduction and noise reduction device can be used on a strut of a wind driven generator, an exposed supporting structure of an underwater vehicle, external supporting structures of a bridge, a vehicle, a train and an airplane and the like. The resistance reduction and noise reduction device has a simple structure, is easy to use and has the obvious effect of reducing resistance. The service lives of the strut and the bridge can be prolonged. When the resistance reduction and noise reduction device is used on the vehicle or an aircraft, little weight is increased, the resistance can be reduced, energy can be saved, and the aerodynamic noise is reduced. The resistance reduction and noise reduction device has the obvious resistance reduction effect and low manufacturing cost and is convenient to process.
Description
Technical field
The utility model relates to a kind of device that can reduce object resistance in the wind field according to wind direction automatic control tegulatingdevice direction, the drag reduction denoising device of a kind of automatic adjustment direction of specific design especially is applicable to the drag reduction at the objects such as utility pole in the area that wind-force is bigger throughout the year.
Background technique
Along with the development of technology and the shortage of world energy sources, wind energy is as a kind of green energy resource now, and the people that utilize of wind energy more and more pay attention to, and the application of wind generating technology is more and more general, and the installation amount of wind power generating set increases year by year.But wind-force wind-powered electricity generation unit generally all is positioned at the big place of plateau wind, and wind power generating set and power transmission facility are subjected to the wind-force effect of strong wind throughout the year in the big place of wind, happens occasionally because wind blows the incident of broken hair group of motors pole and transmission pole greatly.
Common generator set pole and utility pole generally all are the cylinder type cross sections, when air flow stream is crossed pole, can form separated flow in the back of cylindrical pole and produce the trailing vortex that periodically comes off, the separation zone static pressure ratio is lower, formed a thrust just because of the huge difference of cylindrical pole windward side and lee face static pressure to pole, this thrust is one of main active force of fractureing of pole, when the wind speed of incoming flow is enough big, about the trailing vortex meeting that pole forms later, periodically come off and make the static pressure left and right sides cyclically-varying of pole lee face, the cyclically-varying of this static pressure is equivalent to periodically variable active force in the left and right sides of pole, and this active force is one of major reason of pole fatigue fracture.The pole trailing vortex periodically comes off about lee face and can produce aerodynamic noise simultaneously.
Summary of the invention
The purpose of this utility model is in order to address the above problem, and original electric power is being provided with under the little situation of change, can reduce aerodynamic noise simultaneously by install the resistance that a simple outside plant reduces the suffered air-flows of parts such as pole additional to pole.Guarantee the life-span and the influence that reduces surrounding environment of pole.
A kind of drag reduction denoising device of automatic adjustment direction comprises asymmetric airfoil drag reduction shell and slewing gear;
Asymmetric airfoil drag reduction shell is enclosed within the pole periphery, is provided with slewing gear in the middle of asymmetric airfoil drag reduction shell and the pole, makes asymmetric airfoil drag reduction shell to rotate around pole.
Described asymmetric airfoil drag reduction shell is divided into head and afterbody two-part, and the length of afterbody is greater than the length of head.
Described slewing gear is ball bearing or can freedom installs in relative rotation.
Advantage of the present utility model is:
The utility model can be used in the pole of wind-driven generator, submarine navigation device expose supporting structure, bridge, the external support structure of automobile, train, aircraft etc.This is simple in structure, and is easy-to-use, and drag-reduction effect is obvious, can increase the life-span of pole, bridge, be used in gain in weight on the traffic tool such as automobile or the aircraft few, can also drag-reduction energy-saving, reduce aerodynamic noise.Drag-reduction effect is obvious, and low cost of manufacture is easy to process.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure:
1-asymmetric airfoil drag reduction shell; The 2-ball bearing; 3-pole; The 4-head; The 5-afterbody.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model is a kind of drag reduction denoising device of automatic adjustment direction, as shown in Figure 1, comprises asymmetric airfoil drag reduction shell 1 and slewing gear 2.
Asymmetric airfoil drag reduction shell 1 is enclosed within pole 3 peripheries, be provided with slewing gear 2 in the middle of asymmetric airfoil drag reduction shell 1 and the pole 3, make asymmetric airfoil drag reduction shell 1 to rotate around pole 3, asymmetric airfoil drag reduction shell 1 is divided into head 4 and afterbody 5 two-part, and the length of afterbody 5 is greater than the length of head 4.Slewing gear 2 can freedom install in relative rotation for ball bearing or similar bearing.
Cross an object when air flow stream and can boundary layer separation take place at the object rear later on, form whirlpool, form pressure reduction in object upstream and downstream both sides, this pressure reduction makes object be subjected to the active force of air-flow just.The utility model becomes aerofoil profile (asymmetric airfoil drag reduction shell 1) with original object cross section by circle, air-flow is not allowed to separate at the rear of object, reduced the trailing vortex of object back, the pressure reduction of object upstream and downstream diminishes, thereby makes the effect of the air-flow that object is subjected to reduce.In addition when the direction of airflow direction and asymmetric airfoil drag reduction shell 1 is inconsistent, because asymmetric airfoil drag reduction shell 1 is that head 4 is shorter, afterbody 5 is long, the head 4 and the afterbody 5 of asymmetric airfoil drag reduction shell 1 are subjected to wind action power, because moment of torsion M of the asymmetric formation of shape of head 4 and afterbody 5 makes head 4 turn to flow path direction, afterbody 5 turns to downstream direction.Thereby realize that damping device is according to coming flow path direction to regulate the purpose of direction automatically.What the utility model provided can adjust pole 3 exterior contours automatically according to the direction of incoming flow, makes it and comes flow path direction consistent, improves air velocity distribution around the pole 3, thereby reduces the purpose of the aerodynamic noise of pole 3 resistance of receiving and reduction pole.
Claims (4)
1. a drag reduction denoising device of adjusting direction automatically is characterized in that, comprises asymmetric airfoil drag reduction shell and slewing gear;
Asymmetric airfoil drag reduction shell is enclosed within the pole periphery, is provided with slewing gear in the middle of asymmetric airfoil drag reduction shell and the pole, makes asymmetric airfoil drag reduction shell to rotate around pole.
2. the drag reduction denoising device of a kind of automatic adjustment direction according to claim 1 is characterized in that, described asymmetric airfoil drag reduction shell is divided into head and afterbody two-part, and the length of afterbody is greater than the length of head.
3. the drag reduction denoising device of a kind of automatic adjustment direction according to claim 1 is characterized in that, described slewing gear is a ball bearing.
4. the drag reduction denoising device of a kind of automatic adjustment direction according to claim 1 is characterized in that described slewing gear is for can freedom installing in relative rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201490955U CN202040156U (en) | 2011-05-11 | 2011-05-11 | Resistance reduction and noise reduction device capable of automatically regulating direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201490955U CN202040156U (en) | 2011-05-11 | 2011-05-11 | Resistance reduction and noise reduction device capable of automatically regulating direction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202040156U true CN202040156U (en) | 2011-11-16 |
Family
ID=44967602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201490955U Expired - Fee Related CN202040156U (en) | 2011-05-11 | 2011-05-11 | Resistance reduction and noise reduction device capable of automatically regulating direction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202040156U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020106A (en) * | 2015-08-14 | 2015-11-04 | 厦门大学 | Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing |
| CN106824531A (en) * | 2017-01-20 | 2017-06-13 | 美的集团股份有限公司 | Fume purifying module and fume extractor |
| CN107219302A (en) * | 2017-05-26 | 2017-09-29 | 河海大学 | Pillarwork and surrounding riverbed medium appearance delection device and application method under water |
| CN112922537A (en) * | 2021-03-02 | 2021-06-08 | 太原理工大学 | Drill rod |
-
2011
- 2011-05-11 CN CN2011201490955U patent/CN202040156U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020106A (en) * | 2015-08-14 | 2015-11-04 | 厦门大学 | Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing |
| CN106824531A (en) * | 2017-01-20 | 2017-06-13 | 美的集团股份有限公司 | Fume purifying module and fume extractor |
| CN107219302A (en) * | 2017-05-26 | 2017-09-29 | 河海大学 | Pillarwork and surrounding riverbed medium appearance delection device and application method under water |
| CN112922537A (en) * | 2021-03-02 | 2021-06-08 | 太原理工大学 | Drill rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20120511 |