CN208119410U - propeller - Google Patents

Abstract

The utility model provides a kind of propeller, it includes fixing seat and blade, blade includes the petiole close to fixing seat, the interconnecting piece of blade tip and connection petiole and blade tip far from fixing seat, petiole, blade tip and interconnecting piece include blade back, the blade face being oppositely arranged with blade back, blade face is connected with the leading edge of blade back a side and connect the rear on blade face and another side of blade back, blade further includes the first protruding portion extended from the rear of blade tip toward the leading edge direction far from blade tip, the second protruding portion extended from the rear of petiole toward the leading edge direction far from petiole and the third protruding portion extended from the leading edge of petiole toward the rear direction far from petiole, blade rotates a circle to form paddle disk as origin using the center of fixing seat；It is at the 40% of the radius of paddle disk at the center apart from fixing seat, the angle of attack of blade is 14.61 ° ± 2.5 °, and the chord length of blade is 73.47mm ± 5mm.Compared with the relevant technologies, the working efficiency of propeller provided by the utility model is higher.

Description

Propeller

【Technical field】

The utility model relates to aircraft field more particularly to a kind of propellers.

【Background technique】

Propeller is the important component of aircraft, is used to convert thrust or lift for the rotation of motor output shaft with reality Landing, steering, the hovering etc. of existing unmanned plane.

The propeller of the prior art, outer shape are usually in rectangle, since the propeller resistance using rectangle is big, efficiency It is low so that motor output shaft be converted into thrust or the transmission efficiency of lift is affected, so as to cause aircraft fly Scanning frequency degree is small, endurance distance is short, is unable to satisfy the demand of expected thrust or lift at work.

Therefore, it is necessary to provide a kind of improved propeller to solve the above problems.

【Utility model content】

The technical problem to be solved by the present invention is to provide a kind of propellers that can improve working efficiency.

In order to solve the above technical problems, the utility model provides a kind of propeller comprising：Fixing seat and blade, institute It states blade to be connected in the fixing seat, the blade includes close to the petiole of the fixing seat side, far from the fixing seat The blade tip of side and the interconnecting piece of the connection petiole and the blade tip, the petiole, the blade tip and the interconnecting piece wrap It includes blade back, the blade face being oppositely arranged with the blade back, connect described in the leading edge and connection of the blade face and described blade back a side The rear on blade face and another side of the blade back, the blade further include the rear from the blade tip toward far from before the blade tip The first protruding portion that edge direction extends to form is extended to form toward the leading edge direction far from the petiole from the rear of the petiole Second protruding portion and the third protruding portion extended to form from the leading edge of the petiole toward the rear direction far from the petiole, it is described Blade rotates a circle to form a circular paddle disk using the center of the fixing seat as origin；It is at the center apart from the fixing seat At the 40% of the radius of the paddle disk, the angle of attack of the blade is 14.61 ° ± 2.5 °, the chord length of the blade be 73.47mm ± 5mm。

Preferably, the blade rotate a circle the paddle disk to be formed diameter be 918mm ± 50mm, apart from the fixing seat Center 183.6mm at, the angle of attack of the blade is 14.61 ° ± 2.5 °, and the chord length of the blade is 73.47mm ± 5mm.

Preferably, the center apart from the fixing seat be the paddle disk radius 70% at, the angle of attack of the blade It is 8.66 ° ± 2.5 °, the chord length of the blade is 55.66mm ± 5mm.

Preferably, the blade rotate a circle the paddle disk to be formed diameter be 918mm ± 50mm, apart from the fixing seat Center 321.3mm at, the angle of attack of the blade is 8.66 ° ± 2.5 °, and the chord length of the blade is 55.66mm ± 5mm.

Preferably, the center apart from the fixing seat be the paddle disk radius 97% at, the angle of attack of the blade It is 6.01 ° ± 2.5 °, the chord length of the blade is 33.81mm ± 5mm.

Preferably, the blade rotate a circle the paddle disk to be formed diameter be 918mm ± 50mm, apart from the fixing seat Center 445.23mm at, the angle of attack of the blade is 6.01 ° ± 2.5 °, and the chord length of the blade is 33.81mm ± 5mm.

Preferably, the thickness of first protruding portion is from the leading edge direction close to the blade tip toward far from before the blade tip Edge direction is gradually reduced, and the thickness of second protruding portion is from the leading edge direction close to the petiole toward far from before the petiole Edge direction is gradually reduced, and the thickness of the third protruding portion is from the rear direction close to the petiole toward far from after the petiole Edge direction is gradually reduced.

Preferably, there are two the blade is set, center symmetric setting of two blades about the fixing seat.

Preferably, the fixing seat is structure as a whole with the blade.

Preferably, the blade is to fold blade.

Compared with the relevant technologies, the propeller of the utility model passes through the shape for rationally designing blade, so that using the paddle The propeller of leaf can reduce air drag, to improve the working efficiency of propeller, and then increase the continuation of the journey of aircraft Distance and the flying quality for improving aircraft.

【Detailed description of the invention】

It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Other attached drawings are obtained, wherein：

Fig. 1 is the first angled arrangement schematic diagram of the utility model propeller；

Fig. 2 is second of angled arrangement schematic diagram of the utility model propeller；

Fig. 3 is the third angled arrangement schematic diagram of the utility model propeller；

Fig. 4 is the cross-sectional view of the A-A section at the center 183.6mm in propeller shown in Fig. 1 apart from fixing seat；

Fig. 5 is the cross-sectional view of the B-B section at the center 321.3mm in propeller shown in Fig. 1 apart from fixing seat；

Fig. 6 is the cross-sectional view of the C-C section at the center 445.23mm in propeller shown in Fig. 1 apart from fixing seat.

【Specific embodiment】

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work All other embodiment obtained, fall within the protection scope of the utility model.

Present embodiments provide for a kind of propellers 100, can be positive paddle either anti-paddle.So-called positive paddle, refers to from driving Part such as motor tail portion is seen to motor head direction, is rotated clockwise to generate the propeller of lift；So-called anti-paddle refers to from motor tail Portion is seen to motor head direction, is rotated to produce the propeller of lift counterclockwise.The knot of the structure of the positive paddle and the anti-paddle Mirror symmetry between structure.

In addition, the positional terms such as upper and lower occurred in embodiment are to be installed on spiral shell after aircraft with the propeller 100 The normal operational attitude for revolving paddle and aircraft is reference, and be should not be considered as restrictive.

Fig. 1 to Fig. 3 is please referred to, the utility model provides a kind of propeller 100 comprising fixing seat (not shown) And blade 10.

The blade 10 is set as two, center symmetric setting of two blades 10 about the fixing seat.

The propeller 100 can be self-tightening paddle or folding paddle.The folding paddle is referred to by by 10 folding of blade It is laminated to parallel with aircraft fuselage or sticks on aircraft fuselage to reduce the volume of entire aircraft with convenient transportation and deposit It puts.

The blade 10 is connected to the fixing seat.In present embodiment, two blades 10 are distinguished with the fixing seat Machine-shaping is fixedly mounted integral.Certainly, two blades 10 can be integrated machine-shaping with the fixing seat and be integrated knot Structure.

When the propeller 100 work, the blade 10 rotates to form paddle disk around the center of the fixing seat, Lift is generated with rough air or thrust drives the movement of aircraft.The embodiment of the present invention blade 10 can use the prior art In arbitrary material manufactured, including but not limited to steel, aluminium alloy, plastics, carbon fiber etc..During fabrication, it can also adopt With the processing technology for including the various prior arts such as molding, punching press, forging.

It should be noted that blade 10 described in the present embodiment and the fixing seat are machine-shaping respectively, it is fixedly mounted It is into a single integrated structure, so the blade 10 is provided with and fixing seat installation close to the fixing seat side in the present embodiment Fixed attachment base 20, the blade 10 are fixed by the attachment base 20 and fixing seat installation, and driving device is inserted into institute The central point of fixing seat is stated, to drive 100 rotary work of propeller.It is understood that when paddle in other embodiments When leaf 10 and fixing seat are integrated machine-shaping and are structure as a whole, blade 10 will not need setting attachment base 20 and fixing seat is installed It is fixed.It even can be understood as the fixing seat in as the present embodiment of attachment base 20 of blade 10 in other embodiments, Driving device can be inserted directly into 20 center of attachment base, to drive 100 rotary work of propeller.

The blade 10 includes 10 petioles 11 close to the fixing seat side, the blade tip 12 far from the fixing seat side And the interconnecting piece 13 of the connection petiole 11 and the blade tip 12.

The petiole 11, the blade tip 12 and the interconnecting piece 13 include the leaf that blade back and the blade back are oppositely arranged Face, the connection blade face are with the leading edge of described blade back a side and connect the rear on the blade face Yu another side of the blade back. Wherein, the blade back is aircraft in flight course, and the blade 10 (works upward for the propeller 100 herein upward When thrust direction) one side；The blade face be aircraft in flight course, the blade 10 downward (herein downward for institute State blade back opposite side) one side；The rear is located at the up-front lower section, and (the i.e. described leading edge is for the rear Closer to thrust direction when the propeller 100 work).

That is the petiole 11, the blade tip 12 and the interconnecting piece 13 are by the blade back, blade face, described Four faces of leading edge and the rear are enclosed.The blade back of the i.e. described petiole 11, the blade face of the petiole 11, the petiole 11 The rear of leading edge and the petiole 11 surrounds the petiole；The blade back of the blade tip 12, the blade face of the blade tip 12, the blade tip The rear of 12 leading edge and the blade tip 12 surrounds the blade tip 12；The leaf of the blade back of the interconnecting piece 13, the interconnecting piece 13 The rear in face, the leading edge of the interconnecting piece 13 and the interconnecting piece 13 surrounds the interconnecting piece 13.

Highest point on the blade back and the blade face is respectively positioned on the intermediate local of the blade back and the blade face and close Minimum point on the leading edge side, the blade back and the blade face is the rear position.I.e. from the leading edge toward institute State rear direction, the height on the blade back and the blade face first can be in rising trend, rise to it is on a declining curve again behind highest point, So that the blade back is arc-shaped with the blade back and opening direction (pushes away when working downward for the propeller 100 herein downward The opposite direction in power direction).

The blade back and the blade face are curved surface and are smooth transition, and the position that do not reverse sharply has lesser Stress.

From the petiole 11 toward 12 direction of blade tip, the thickness-tapered of the blade 10.The i.e. described petiole 11 is described The thicker side of thickness in blade 10, and the blade tip 12 is the side of thinner thickness in the blade 10.

The blade 10 further includes extending shape toward the leading edge direction far from the blade tip 12 from the rear of the blade tip 12 At the first protruding portion 14, from the rear of the petiole 11 toward far from the petiole 11 leading edge direction extend to form second Protruding portion 15 and the third protruding portion extended to form from the edge of the petiole 11 toward the rear direction far from the petiole 11 16。

First protruding portion 14 is from the leading edge direction close to the blade tip 12 toward the leading edge direction far from the blade tip 12 Thickness be gradually reduced.

Specifically, the farthest one end of first protruding portion 14 from the blade tip 12 apart from the fixing seat is toward far from described The blade back direction inclination of the leading edge direction of blade tip 12 and the separate blade tip 12 extends to form.

First protruding portion 14 can be reduced the vortex that 12 part of blade tip is formed and reduce by 12 part of blade tip Vortex intensity weakens the air pressure change degree near the blade tip 12, so that the air drag that the blade 10 is subject to is reduced, into And increase the blade 10 has more preferably thrust or lift when rotated.

Second protruding portion 15 is from the leading edge direction close to the petiole 11 toward the leading edge direction far from the petiole 11 Thickness be gradually reduced.The third protruding portion 16 is from the rear direction close to the petiole 11 toward far from after the petiole 11 The thickness in edge direction is gradually reduced.

Second protruding portion 15 can preferably reduce the sky that 11 part of petiole is subject to the third protruding portion 16 Atmidometer, so that the blade 10 has more preferably thrust or lift when rotated.

Preferably, the propeller 100 further includes the protection being covered on the blade tip 12 and first protruding portion 14 Layer (not shown), the protective layer are made of metal material.

At work, the protective layer can effectively prevent the blade tip 12 of the propeller 100 to the propeller 100 It is damaged and corrodes with first protruding portion 14.The propeller 100 when running at high speed for a long time, 12 He of blade tip The strike easy to operate blade tip 12 and institute of first protruding portion, 14 long-time by solid matters such as sandstones in air When it is impaired to state the first protruding portion 14, and working under the conditions of special weather, the blade tip 12 and first protruding portion 14 hold Vulnerable to corrosion, strong influence is generated to security performance, so that the protective layer is arranged in the present embodiment makes the blade tip 12 and first protruding portion 14 have longer service life.

Preferably, the protective layer is structure as a whole with the blade 10 by injection molding.

More preferably, the protective layer can be set to the leading edge of petiole 11 and rear, the leading edge of the blade tip 12 and rear, described The leading edge and rear of interconnecting piece 13, the edge of first protruding portion 14, the edge of second protruding portion 15 and the third The edge of protruding portion 16.The protective layer is set in the side of the blade 10, avoids the side of the blade 10 by corruption It loses and impaired.That is, if regard the blade 10 as an entirety, and the blade 10 is by blade back, blade face, preceding If edge, rear composition, the protective layer is just set in the leading edge and rear of the blade 10, described in the protective layer covering The leading edge and rear of blade 10, to increase the service life and security performance of the blade 10.

Please refer to Fig. 4.At the radius 40% of the paddle disk is in the center apart from the fixing seat, the blade The angle of attack is 14.61 ° ± 2.5 °, and the chord length of the blade is 73.47mm ± 5mm；

In the present embodiment, specifically, the blade 10 rotates a circle, the diameter for the paddle disk to be formed is 918mm ± 50mm, At the fixing seat center 183.6mm, the angle of attack of the blade 10 is 14.61 ° ± 2.5 °, the chord length of the blade 10 For 73.47mm ± 5mm.

Please refer to Fig. 5.It is the blade 10 at the radius 70% of the paddle disk at the center apart from the fixing seat The angle of attack be 8.66 ° ± 2.5 °, the chord length of the blade 10 is 55.66mm ± 5mm；

In the present embodiment, specifically, the blade 10 rotates a circle, the diameter for the paddle disk to be formed is 918mm ± 50mm, At the fixing seat center 321.3mm, the angle of attack of the blade 10 is 8.66 ° ± 2.5 °, and the chord length of the blade 10 is 55.66mm±5mm。

Please refer to Fig. 6.It is the blade 10 at the radius 97% of the paddle disk at the center apart from the fixing seat The angle of attack be 6.01 ° ± 2.5 °, the chord length of the blade 10 is 33.81mm ± 5mm.

In the present embodiment, specifically, the diameter of the blade 10 1 weeks paddle disks formed is 918mm ± 50mm, in distance At the fixing seat center 445.23mm, the angle of attack of the blade is 6.01 ° ± 2.5 °, and the chord length of the blade is 33.81mm ±5mm。

Wherein, chord length refers to that at the section, the leading edge is located at the endpoint of the rightmost side on the section and is located at the rear The distance of the endpoint of the leftmost side in the horizontal direction on the section；The angle of attack refers to that the leading edge is located at the end of the rightmost side on the section Point and the rear are located at the connecting line between the endpoint of the section leftmost side and angle or the angle of attack between horizontal direction (rightmost side and the leftmost side are with reference to Fig. 4 to the wing chord and the angle of gas direction of flow that can be understood as the blade 10 herein To the direction Fig. 6).

It is changed by the angle of attack at each position on the blade 10 to the propeller 100 with chord length, so that described Propeller 100 has more preferably flight effect, improves the thrust or lift when flight.

Refer to table 1, table 1 be paddle disk in the present embodiment, the angle of attack, chord length design parameter data.

【Table 1】

Table 2 is referred to, the comparison of the test structure of propeller 100 described in the present embodiment and traditional propeller, by table 2 As can be seen that, to reduce kwh loss, increasing cruising ability, so that using the flight of the propeller 100 in identical pulling force Device can have better thrust or lift, and have longer cruise duration.

【Table 2】

Compared with the relevant technologies, the propeller of the utility model passes through the shape for rationally designing blade, so that using the paddle The propeller of leaf can reduce air drag, to improve the working efficiency of propeller, and then increase the continuation of the journey of aircraft Distance and the flying quality for improving aircraft.

Above-described is only the embodiments of the present invention, it should be noted here that for the ordinary skill of this field For personnel, without departing from the concept of the present invention, improvement can also be made, but these belong to it is practical Novel protection scope.

Claims (10)

1. a kind of propeller, including：Fixing seat and blade, the blade are connected in the fixing seat, it is characterised in that：It is described Blade includes the petiole close to the fixing seat side, the blade tip far from the fixing seat side and the connection petiole and described The interconnecting piece of blade tip, the petiole, the blade tip and the interconnecting piece include the leaf that blade back and the blade back are oppositely arranged Face, the connection blade face are with the leading edge of described blade back a side and connect the rear on the blade face and another side of the blade back, The blade further include the first protruding portion extended to form from the rear of the blade tip toward the leading edge direction far from the blade tip, from The second protruding portion that the leading edge direction of the rear of the petiole toward the separate petiole extends to form and the leading edge from the petiole The third protruding portion extended to form toward the rear direction far from the petiole, the blade is using the center of the fixing seat as origin It rotates a circle to form a circular paddle disk；The center apart from the fixing seat be the paddle disk radius 40% at, it is described The angle of attack of blade is 14.61 ° ± 2.5 °, and the chord length of the blade is 73.47mm ± 5mm.

2. propeller according to claim 1, it is characterised in that：The rotate a circle diameter of the paddle disk to be formed of the blade is 918mm ± 50mm, at the center 183.6mm apart from the fixing seat, the angle of attack of the blade is 14.61 ° ± 2.5 °, described The chord length of blade is 73.47mm ± 5mm.

3. propeller according to claim 1, it is characterised in that：It is the paddle disk at the center apart from the fixing seat At the 70% of radius, the angle of attack of the blade is 8.66 ° ± 2.5 °, and the chord length of the blade is 55.66mm ± 5mm.

4. propeller according to claim 3, it is characterised in that：The rotate a circle diameter of the paddle disk to be formed of the blade is 918mm ± 50mm, at the center 321.3mm apart from the fixing seat, the angle of attack of the blade is 8.66 ° ± 2.5 °, described The chord length of blade is 55.66mm ± 5mm.

5. propeller according to claim 1, it is characterised in that：It is the paddle disk at the center apart from the fixing seat At the 97% of radius, the angle of attack of the blade is 6.01 ° ± 2.5 °, and the chord length of the blade is 33.81mm ± 5mm.

6. propeller according to claim 5, it is characterised in that：The rotate a circle diameter of the paddle disk to be formed of the blade is 918mm ± 50mm, at the center 445.23mm apart from the fixing seat, the angle of attack of the blade is 6.01 ° ± 2.5 °, described The chord length of blade is 33.81mm ± 5mm.

7. propeller according to claim 1, it is characterised in that：The thickness of first protruding portion is from close to the blade tip Leading edge direction be gradually reduced toward far from the leading edge direction of the blade tip, the thickness of second protruding portion is from close to the petiole Leading edge direction be gradually reduced toward far from the leading edge direction of the petiole, the thickness of the third protruding portion is from close to the petiole Rear direction be gradually reduced toward far from the rear direction of the petiole.

8. propeller according to claim 1, it is characterised in that：There are two the blade is set, two blades are about institute State the center symmetric setting of fixing seat.

9. propeller according to claim 8, it is characterised in that：The fixing seat is structure as a whole with the blade.

10. propeller according to claim 1, it is characterised in that：The blade is to fold blade.