CN117508572A - Unmanned aerial vehicle is with displacement screw - Google Patents
Unmanned aerial vehicle is with displacement screw Download PDFInfo
- Publication number
- CN117508572A CN117508572A CN202210909390.9A CN202210909390A CN117508572A CN 117508572 A CN117508572 A CN 117508572A CN 202210909390 A CN202210909390 A CN 202210909390A CN 117508572 A CN117508572 A CN 117508572A
- Authority
- CN
- China
- Prior art keywords
- blade body
- airfoil section
- root
- unmanned aerial
- aerial vehicle
- 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
- 238000006073 displacement reaction Methods 0.000 title claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/16—Blades
- B64C11/20—Constructional features
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Toys (AREA)
Abstract
The invention relates to a propeller, in particular to a variable-pitch propeller for an unmanned aerial vehicle, which comprises a blade body formed by sequentially and smoothly transiting fourteen airfoil section distributed along the length direction of the blade, wherein the chord length c of the airfoil section is 134-57 mm; taking the first airfoil section of the root of the blade body as a reference, and the distance r from the rest airfoil sections to the first airfoil section of the root of the blade body is 48-624 mm; taking a plane A defined by a chord long line of a first airfoil section positioned at the root of the blade body and a rotation center line of the blade body as a reference, wherein an included angle beta formed by the chord long line of the rest airfoil sections and the plane A is 3.3-21.8 degrees; the distance from the front edge of each airfoil section to the rotation center of the blade body is 38% -42% of the chord length. The technical scheme solves the problems of short take-off distance and low high-altitude long-time cruising efficiency when the diameter of the propeller of the small unmanned aerial vehicle in the prior art is 1.92 m.
Description
Technical Field
The invention relates to a propeller, in particular to a variable-pitch propeller for an unmanned aerial vehicle.
Background
At present, a 100KW class power propeller is mainly used for a small-sized manned aircraft, and the flying altitude of the propeller is low. There are few propellers that are applied to small fixed wing unmanned aerial vehicles with flying heights up to 10 ㎞. In order to meet the requirements of a small unmanned aerial vehicle on high altitude and long cruising, a propeller matched with a 100KW level is necessary to design.
For example, on the premise that the diameter of the propeller of the small-sized fixed-wing unmanned aerial vehicle is on the order of 1.92 meters, the requirements of short-distance take-off and long-time high-altitude cruising of the small-sized fixed-wing unmanned aerial vehicle are guaranteed, and the requirements are the problems to be solved in the present urgent need.
Disclosure of Invention
The invention aims to provide a variable-pitch propeller for an unmanned aerial vehicle, which aims to solve the problem that the propeller of a small fixed-wing unmanned aerial vehicle in the prior art cannot realize short-distance take-off and long-time high-altitude cruising when the diameter requirement is 1.92 meters.
In order to achieve the purpose, the basic scheme of the invention provides a variable pitch propeller for an unmanned aerial vehicle, which comprises a blade body formed by sequentially and smoothly transiting fourteen airfoil section distributed along the length direction of the blade, wherein the chord length of the airfoil section is c; taking the first airfoil section of the root of the blade body as a reference, wherein the distance from the rest airfoil sections to the first airfoil section of the root of the blade body is r; taking a plane A defined by a chord long line of a first airfoil section positioned at the root of the blade body and a rotation center line of the blade body as a reference, wherein an included angle formed by the chord long line of the rest airfoil sections and the plane A is beta; the distance from the front edge of each airfoil section to the rotation center of the blade body is 38% -42% of the chord length; the parameters for each airfoil section are shown in the following table: the number of the airfoil section is sequentially from 1 to 14 from the root to the tip of the blade body,
further, the distance from the first airfoil section of the root of the blade body to the axis of rotation of the propeller is 336 millimeters.
Further, the appearance of paddle body is low-speed needle form, the oar point of paddle body is straight and takes the backswept.
Further, the paddle body is provided with three, and the contained angle between adjacent paddle bodies is 120 °.
Further, the thickness of the blade body decreases gradually from the root to the tip.
The beneficial effect of this scheme lies in: by adopting the arrangement, the requirement of short take-off distance of the small fixed wing unmanned aerial vehicle is realized on the premise that the diameter requirement of the propeller is 1.92 meters, and meanwhile, the requirement of high altitude long-endurance of the unmanned aerial vehicle can be met.
Drawings
Fig. 1 is a schematic view of an embodiment of a variable pitch propeller for an unmanned aerial vehicle according to the present invention;
FIG. 2 is a schematic view of the blade body of FIG. 1;
FIG. 3 is a schematic view of a cross-section of one of the airfoils of FIG. 2.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: root 1, airfoil section 2, leading edge 3, trailing edge 4, blade tip 5.
An embodiment is substantially as shown in figures 1 to 3 of the accompanying drawings: the utility model provides an unmanned aerial vehicle is with displacement screw, includes the paddle body, and in this embodiment, the paddle body is provided with three to contained angle between the adjacent paddle body is 120. The blade body is formed by sequentially and smoothly transiting fourteen airfoil sections 2 distributed along the length direction of the blade, and the thickness of the blade body gradually decreases from the root 1 to the blade tip 5. The chord length of the airfoil section 2 is c; taking the first airfoil section of the root 1 of the blade body as a reference, and the distance from the rest airfoil sections to the first airfoil section of the root of the blade body is r; taking a plane A defined by a chord long line of a first airfoil section positioned at the root of the blade body and a rotation center line of the blade body as a reference, wherein an included angle formed by the chord long line of the rest airfoil sections and the plane A is beta; the distance from the front edge of each airfoil section to the rotation center of the blade body is 38% -42% of the chord length, and the preferred embodiment is 40%, of course, 38%, 42% and the like can be selected; the parameters for each airfoil section are shown in the following table: the number of the airfoil section is sequentially from 1 to 14 from the root to the tip of the blade body,
in this embodiment, the distance from the first airfoil section of the root of the blade body to the axis of rotation of the propeller is 336 millimeters. In the embodiment, the appearance of the paddle body is a low-speed needle, and the paddle tip of the paddle body is straight and has backswept.
By adopting the scheme, when the diameter requirement of the propeller is on the premise of 1.92 m, the thrust generated by the propeller is larger, so that the requirement of short take-off distance of the small fixed-wing unmanned aerial vehicle is met, and meanwhile, the efficiency requirement of high-altitude long-distance navigation of the unmanned aerial vehicle can be met.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (5)
1. The utility model provides a unmanned aerial vehicle is with displacement screw which characterized in that: the blade comprises a blade body formed by sequentially and smoothly transiting fourteen airfoil sections distributed along the length direction of the blade, wherein the chord length of the airfoil sections is c; taking the first airfoil section of the root of the blade body as a reference, wherein the distance from the rest airfoil sections to the first airfoil section of the root of the blade body is r; taking a plane A defined by a chord long line of a first airfoil section positioned at the root of the blade body and a rotation center line of the blade body as a reference, wherein an included angle formed by the chord long line of the rest airfoil sections and the plane A is beta; the distance from the front edge of each airfoil section to the rotation center of the blade body is 38% -42% of the chord length; the parameters for each airfoil section are shown in the following table: the number of the airfoil section is sequentially from 1 to 14 from the root to the tip of the blade body,
2. the variable pitch propeller for an unmanned aerial vehicle according to claim 1, wherein: the first airfoil section of the root of the blade body is at a distance of 336 mm from the axis of rotation of the propeller.
3. A variable pitch propeller for an unmanned aerial vehicle according to claim 1 or 2, wherein: the appearance of paddle body is low-speed needle form, the oar point of paddle body is straight and takes the sweepback.
4. A variable pitch propeller for an unmanned aerial vehicle according to claim 3, wherein: the paddle body is provided with three, and the contained angle between adjacent paddle body is 120.
5. The variable pitch propeller for an unmanned aerial vehicle according to claim 4, wherein: the thickness of the blade body gradually decreases from the root to the tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210909390.9A CN117508572A (en) | 2022-07-29 | 2022-07-29 | Unmanned aerial vehicle is with displacement screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210909390.9A CN117508572A (en) | 2022-07-29 | 2022-07-29 | Unmanned aerial vehicle is with displacement screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117508572A true CN117508572A (en) | 2024-02-06 |
Family
ID=89763188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210909390.9A Pending CN117508572A (en) | 2022-07-29 | 2022-07-29 | Unmanned aerial vehicle is with displacement screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117508572A (en) |
-
2022
- 2022-07-29 CN CN202210909390.9A patent/CN117508572A/en active Pending
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