CN117382938A - Negative pressure and thrust dual-purpose propeller structure - Google Patents
Negative pressure and thrust dual-purpose propeller structure Download PDFInfo
- Publication number
- CN117382938A CN117382938A CN202311485410.5A CN202311485410A CN117382938A CN 117382938 A CN117382938 A CN 117382938A CN 202311485410 A CN202311485410 A CN 202311485410A CN 117382938 A CN117382938 A CN 117382938A
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- radius
- small
- negative pressure
- blade
- paddles
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- 230000009977 dual effect Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 20
- 238000001179 sorption measurement Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U30/00—Means for producing lift; Empennages; Arrangements thereof
- B64U30/20—Rotors; Rotor supports
- B64U30/29—Constructional aspects of rotors or rotor supports; Arrangements thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60F—VEHICLES FOR USE BOTH ON RAIL AND ON ROAD; AMPHIBIOUS OR LIKE VEHICLES; CONVERTIBLE VEHICLES
- B60F5/00—Other convertible vehicles, i.e. vehicles capable of travelling in or on different media
- B60F5/02—Other convertible vehicles, i.e. vehicles capable of travelling in or on different media convertible into aircraft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D57/00—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track
- B62D57/02—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members
- B62D57/024—Vehicles characterised by having other propulsion or other ground- engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members specially adapted for moving on inclined or vertical surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/70—Convertible aircraft, e.g. convertible into land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Remote Sensing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of unmanned aircrafts, in particular to a negative pressure and thrust dual-purpose propeller structure. The propeller comprises a shaft core of the propeller, wherein the propeller used by a flying robot which is arranged on an adsorbable vertical wall surface is provided with two large-radius paddles and a plurality of first small-radius paddles on the outer wall of the shaft core, and the two large-radius paddles are symmetrically arranged at 180 degrees along the shaft core. The design is optimized by adding a plurality of first small-radius paddles, and compared with the traditional propeller, the design improves the air flow distribution and eliminates the problem of low air flow speed near the shaft core under the negative pressure adsorption and flight state; the air suction effect is enhanced, and particularly, better air circulation is realized in the semi-closed negative pressure cavity.
Description
Technical Field
The invention relates to the technical field of unmanned aircrafts, in particular to a negative pressure and thrust dual-purpose propeller structure.
Background
Conventional aircraft propeller designs are typically focused on providing propulsion without particularly emphasizing the suction effect or performance within the negative pressure cavity. Because the linear velocity of the area near the shaft core is lower than that of other areas, the thrust is weaker than that of other areas, and the air suction effect is poor.
1. The air flow distribution is uneven: near the axis, the lower airflow velocity may result in uneven airflow distribution, thereby affecting the thrust of the aircraft.
2. The air draft effect is not enough: conventional designs may not provide adequate suction within the negative pressure chamber, particularly in semi-enclosed environments, and may not achieve good airflow circulation.
3. Performance balancing problem: as an amphibious flying robot, the special pneumatic and power requirements may require more innovative designs that traditional designs may not meet.
Disclosure of Invention
First, the technical problem to be solved
The invention mainly aims at the problems and provides a negative pressure and thrust dual-purpose propeller structure, which aims to solve the problems of uneven airflow distribution, insufficient air suction effect and performance balance of the traditional propeller.
(II) technical scheme
In order to achieve the purpose, the invention provides a negative pressure and thrust dual-purpose propeller structure, which comprises a shaft core of a propeller, wherein the propeller used by a flying robot arranged on an adsorbable vertical wall surface is provided with two large-radius paddles and a plurality of first small-radius paddles on the outer wall of the shaft core, and the two large-radius paddles are symmetrically arranged along the shaft core at 180 degrees.
Further, holes are formed in the roots, close to the shaft cores, of the large-radius paddles.
Further, the shaft core is provided with a second small-radius blade along the same axis, and the second small-radius blade is positioned at the lower end of the first small-radius blade.
Further, the large-radius blade, the first small-radius blade and the second small-radius blade are made of light abrasion-resistant materials.
Further, the first small-radius blade has a leading edge serration structure including a recess and a protrusion at an outermost position of a leading edge of the first small-radius blade, the recess continuously extending from a root portion near the shaft core to the protrusion position along the first small-radius blade extension direction, the recess accounting for 3/2 of the first small-radius blade extension, and the protrusion accounting for 3/1 of the first small-radius blade extension.
Further, the holes are circular, and the number of the holes is an array.
Further, the shape of the large-radius blade and the first small-radius blade is flat or curved.
Further, the pitch of the large radius blade and the first small radius blade is in the range of 10 to 50 millimeters.
Further, the pitch value between the first small radius blade and the second small radius blade ranges from 20 to 60 millimeters.
Further, the number of the first small-radius paddles is 10-15, and the first small-radius paddles take between one fourth and one half of the radius of the large-radius paddles.
(III) beneficial effects
The invention provides a negative pressure and thrust dual-purpose propeller structure, which is designed optimally by adding a plurality of first small-radius blades. Compared with the traditional propeller, the design realizes the following effects in the negative pressure adsorption and flight state: the air flow distribution is improved, and the problem of low air flow speed near the shaft core is solved; the air suction effect is enhanced, and particularly, better air circulation is realized in the semi-closed negative pressure cavity; the propulsion force and the air draft effect are balanced, so that different pneumatic and power requirements are met; the cruising ability is improved, and the requirement on the adsorption rotating speed is reduced. The innovative design provides stronger air draft effect and performance optimization for the operation environment of the adsorption amphibious flying robot, and has obvious differentiation and application value.
Drawings
Fig. 1 is a practical effect diagram of a negative pressure and thrust dual-purpose propeller structure disclosed in the application.
Fig. 2 is a top view of a negative pressure and thrust dual-purpose propeller structure disclosed in the present application.
Fig. 3 is a front view of a negative pressure and thrust dual-purpose propeller structure disclosed in the present application.
Fig. 4 is a schematic view of a first small radius blade disclosed herein.
Reference numerals shown in the drawings: 1. a shaft core; 2. a large radius blade; 3. a first small radius blade; 4. a second small radius blade; 5. a leading edge serration structure; 101. a hole; 501. a recess; 502. a protrusion.
Detailed Description
The following detailed description of the present invention, taken in conjunction with the accompanying drawings, will clearly and fully describe the technical solutions of the embodiments of the present invention, it being evident that the described embodiments are only some, but not all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 2-3, a structure diagram of a dual-purpose propeller for negative pressure and thrust is provided in a preferred embodiment of the present application. In the embodiment shown in fig. 2-3, a propeller 1 is included, and two large-radius blades 2 and a plurality of first small-radius blades 3 are distributed on the outer wall of the propeller 1, wherein the two large-radius blades 2 are symmetrically arranged along the shaft core at 180 degrees, and the propeller is used for a flying robot installed on an adsorbable vertical wall surface.
In the effect diagram shown in fig. 1, the vertical speed of the air flow passing through the two propellers in the hovering state and the vertical speed of the air flow passing through the two propellers in the suction state are represented, the curve represents the air flow direction, and the curve length represents the air flow speed. The conventional propeller may cause uneven air flow distribution, especially in the vicinity of the shaft core 1. According to the scheme, through the combination of the blades with different sizes, the air flow distribution is adjusted, and the aerodynamic performance of the whole aircraft is improved. By adding the first small radius blade 3 to the propeller, this solution can significantly enhance the suction effect in the vicinity of the shaft core 1. The robot can realize better airflow circulation in the environments such as a semi-closed negative pressure cavity, is beneficial to maintaining a high negative pressure state and improves the adsorption strength of the robot. In addition, the scheme can provide enough propelling force and strengthen the air suction effect. This balance of properties allows the robot to achieve better overall performance in both propulsion and airflow circulation. Because this scheme has better convulsions effect and air current circulation for the adsorption strength of robot can promote, has reduced the adsorption rotation speed requirement, has promoted duration.
The above-described components will be specifically described below.
Two large-radius paddles 2 and a plurality of first small-radius paddles 3 are arranged on the outer wall of the propeller shaft core 1. The blades are symmetrically arranged by 180 degrees, wherein holes 101 are formed in the root of the large-radius blade 2 close to the shaft core 1. Part of the air flow can directly enter the inside of the propeller through the holes 101, so that the flow speed of the air flow near the shaft core 1 can be increased, and the air flow distribution is improved; for the negative pressure cavity, the hole 101 can allow more air to enter, so as to enhance the air suction effect of the area near the shaft core 1 and help to create a stable low-pressure environment.
In addition to the large radius blade 2 and the first small radius blade 3, the shaft core 1 is provided with a second small radius blade 4 along the same axis and located at the lower end of the first small radius blade 3. The second small radius blade 4 further enhances the suction effect, enhancing the aerodynamic forces, particularly in the vicinity of the hub 1. The robot can improve air flow circulation in the environments of a semi-closed negative pressure cavity and the like, and maintain a high negative pressure state, so that the adsorption strength of the robot is improved.
The large-radius blade 2, the first small-radius blade 3, and the second small-radius blade 4 are all made of a lightweight abrasion-resistant material to ensure strength and durability thereof.
Furthermore, as shown in fig. 4, the first small radius blade 3 has a leading edge serration structure 5, specifically, the leading edge serration structure 5 is at the outermost position of the leading edge of the first small radius blade 3, and it is understood that the outermost position is a tip region in the spanwise direction, and includes a recess 501 and a protrusion 502, the recess 501 continuously extends from the root near the shaft core 1 to the protrusion 502 position along the spanwise direction of the first small radius blade 3, the recess 501 occupies 3/2 of the spanwise length of the first small radius blade 3, and the protrusion 502 occupies 3/1 of the spanwise length of the first small radius blade 3.
In this embodiment, the projection 502 portion provides an obstacle between the flying airflow and the surface of the first small radius blade 3, causing turbulence and changing the direction and speed of the airflow. They may take on sharp, rounded or other shapes to create the desired turbulent effect. The portion of the recess 501 is connected to the portion of the protrusion 502 to help create a turbulent flow region. The purpose of this is to induce turbulence in the air flow entering the first small radius blade 3 and to change its direction and flow rate. By introducing turbulence, the leading edge serration structure 5 is able to effectively attenuate the effect of the side-to-side airflow on the first small radius blade 3, improving flight stability and control performance.
The pitch between the large radius blade 2 and the first small radius blade 3 is typically in the range of 10 to 50 mm, while the pitch between the first small radius blade 3 and the second small radius blade 4 is typically in the range of 20 to 60 mm. Furthermore, the number of first small radius blades 3 is typically 10 to 15, the length of which is about one quarter to one half of the radius of the large radius blade 2. The design can provide enough propelling force and optimize the air flow circulation effect, so that the balance of the whole performance is realized.
Through the design characteristics, the propeller of the flying robot can improve air flow distribution, enhance the air draft effect and improve the adsorption strength, and has good propulsion and air flow circulation performance, thereby reducing the requirement on adsorption rotating speed and improving the cruising ability.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. Several of the units or means recited in the apparatus claims may also be embodied by one and the same unit or means, either in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present application.
Claims (10)
1. The utility model provides a negative pressure, dual-purpose screw structure of thrust, its characterized in that includes the axle core of screw for install the screw that flying robot that can adsorb vertical wall used has laid two big radius paddles and several first small radius paddles at the axle core outer wall, wherein, two big radius paddles are 180 degrees symmetry settings along the axle core.
2. The negative pressure and thrust dual-purpose propeller structure of claim 1, wherein the large-radius blade is provided with a hole near the root of the shaft core.
3. The negative pressure and thrust dual-purpose propeller structure according to claim 2, wherein the shaft core is provided with a second small-radius blade along the same axis, and the second small-radius blade is located at the lower end of the first small-radius blade.
4. A negative pressure and thrust dual-purpose propeller structure according to claim 3, wherein the large-radius blades and the first small-radius blades and the second small-radius blades are made of light wear-resistant materials.
5. The negative pressure, thrust dual purpose propeller arrangement of claim 1, wherein the first small radius blade has a leading edge serration arrangement at an outermost location of the leading edge of the first small radius blade, comprising a recess and a protrusion, the recess continuously extending from a root near the shaft core along the first small radius blade span to the protrusion location, the recess being 3/2 of the first small radius blade span and the protrusion being 3/1 of the first small radius blade span.
6. The structure of the negative pressure and thrust dual-purpose propeller according to claim 2, wherein the holes are circular and the number of the holes is an array.
7. The negative pressure and thrust dual-purpose propeller structure of claim 1, wherein the large-radius blades and the first small-radius blades are flat or curved in shape.
8. The negative pressure and thrust dual purpose propeller structure of claim 1, wherein the pitch of the large radius blade and the first small radius blade is in the range of 10 to 50 mm.
9. The negative pressure and thrust dual purpose propeller structure of claim 1, wherein the distance between the first small radius blade and the second small radius blade ranges from 20 to 60 mm.
10. The negative pressure and thrust dual-purpose propeller structure of claim 1, wherein the number of the first small-radius paddles is 10-15, and the first small-radius paddles take a majority of between one quarter and one half of the radius of the passing paddles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311485410.5A CN117382938A (en) | 2023-11-07 | 2023-11-07 | Negative pressure and thrust dual-purpose propeller structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311485410.5A CN117382938A (en) | 2023-11-07 | 2023-11-07 | Negative pressure and thrust dual-purpose propeller structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117382938A true CN117382938A (en) | 2024-01-12 |
Family
ID=89471889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311485410.5A Pending CN117382938A (en) | 2023-11-07 | 2023-11-07 | Negative pressure and thrust dual-purpose propeller structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117382938A (en) |
-
2023
- 2023-11-07 CN CN202311485410.5A patent/CN117382938A/en active Pending
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