CN106114850A - A kind of quiet blade and containing its rotor wing unmanned aerial vehicle - Google Patents
A kind of quiet blade and containing its rotor wing unmanned aerial vehicle Download PDFInfo
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- CN106114850A CN106114850A CN201610471833.5A CN201610471833A CN106114850A CN 106114850 A CN106114850 A CN 106114850A CN 201610471833 A CN201610471833 A CN 201610471833A CN 106114850 A CN106114850 A CN 106114850A
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- blade
- sidewall
- blade body
- side wall
- projection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/46—Blades
- B64C27/473—Constructional features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/10—Propulsion
- B64U50/19—Propulsion using electrically powered motors
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Remote Sensing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of quiet blade, including blade body；The trailing edge of blade body has multiple serrated slot not waited, and forms the sawtooth of multiple Unequal distance between multiple serrated slot and blade bodies not waited；Microarray diaphragm structure it is bonded with on the suction surface of blade body；Microarray diaphragm structure is made up of the projection that some length are different；The projection that some length are different is arranged with sinusoidal wave form at the width of blade body；Protruding in class zigzag structure, the pointed part of class zigzag structure is all towards the trailing edge of blade body；The projection of class zigzag structure includes the first side wall, the second sidewall；The first side wall and the second sidewall are at a certain angle in intersection shape.Also announcing a kind of rotor wing unmanned aerial vehicle, described rotor wing unmanned aerial vehicle comprises above-mentioned quiet blade.The invention has the beneficial effects as follows: noise reduction effect is good, expands range, improve unmanned plane efficiency, improve flight speed.
Description
Technical field
The present invention relates to unmanned plane field, particularly relate to a kind of quiet blade and the rotor wing unmanned aerial vehicle containing it.
Background technology
Society, along with the technology of unmanned plane is more and more progressive, more and more many occasions its figure visible, as military affairs are detectd
Examine, assist anti-terrorism etc., unmanned plane to play great role, reduce unnecessary loss and improve success rate.But at some
In the case of, its noise problem brings hidden danger, as military surveillance generation unmanned plane is found and fallen event to its safety.
The reason that unmanned plane is found is largely precisely due to it has bigger noise, and its low altitude flight, volume are little, are difficult to
Found by radar, but noise governs its safety.For problems, present countries in the world all start one research low noise
The upsurge of unmanned plane.
The noise of unmanned plane mostlys come from two aspects: motor and blade, and the noise level that blade sends is higher than
Motor.At present unmanned plane is substantially the battery-driven motor of employing to drive blade, and the noise level ratio of motor is relatively low,
In overall noise, proportion is little, and this noise that blade is produced is especially pronounced.And blade can produce loud noise
Reason be that the maelstrom that blade produces when rotating cannot be cut and be carded to countless little eddy current, also by existing blade effectively
The effect of guiding cannot not had, it is impossible to form desired airflow by the viscosity air-flow of blade suction surface is effectively separated, because of
This noise is big.
Additionally, the flight speed of existing rotor wing unmanned aerial vehicle is relatively slow, it is not suitable for long-range flight, and withdraws when running into attack
Speed is hacked slowly and easily.
Summary of the invention
The technical problem to be solved is to provide a kind of quiet blade and the rotor wing unmanned aerial vehicle containing it, solves existing
In technology, during flight, noise is big, the technical problem that flight speed is slow.
The technical scheme is that a kind of quiet blade, including blade body；Blade is originally
The trailing edge of body has multiple serrated slot not waited, and forms the saw of multiple Unequal distance between multiple serrated slot and blade bodies not waited
Tooth；Microarray diaphragm structure it is bonded with on the suction surface of blade body；Microarray diaphragm structure is by the different projection of some length
Constitute；Projection and this body by integral forming of blade；The different projection of some length at the width of blade body with sinusoidal wave form
Arrange；Protruding in class zigzag structure, the pointed part of class zigzag structure is all towards the trailing edge of blade body；Class sawtooth
The projection of shape structure includes that the first side wall, the second sidewall, the first side wall and the second sidewall symmetry are arranged, and one end of the first side wall
Intersect with one end of the second sidewall；The first side wall and the second sidewall are at a certain angle in intersection shape；Angle is in the range of 15
Between degree～75 degree.
The invention has the beneficial effects as follows: by offering multiple serrated slot at the trailing edge of blade body, blade can be produced
Maelstrom effectively cuts and is carded to countless little eddy current, forms desired airflow, reduces noise, and serrated slot offered into
Away from, the noise of 1dB can be reduced for equidistant serrated slot；The suction surface of blade body is arranged and is distributed in sine wave
Projection, and projection is arranged in class zigzag structure, the viscosity air-flow of blade suction surface can be effectively separated and
Change the velocity gradient of air-flow, thus serve the effect reducing noise further, expand range, improve unmanned
Engine efficiency.
On the basis of technique scheme, the present invention can also do following improvement.
Further, the projection that some length are different is arranged into zigzag at the length direction of blade body.
Use and above-mentioned further provide the benefit that: the eddy current entered further is cut, be carded to countless little
Eddy current, and then further reduce noise.
Further, the projection that some length are different is shaped as two complete weeks what the width of blade body arranged
The sine wave of phase；The sine wave of one complete cycle comprises 12 projections.
Use and above-mentioned further provide the benefit that: air-flow can be effectively separated, reduce noise.
Further, zone length blade body being arranged projection is long less than the region arranging serrated slot on blade body
Degree.
Use and above-mentioned further provide the benefit that: convenient processing.
Further, blade body is distributed the area of projection and the area ratio of blade body is between 10-40%.
Use and above-mentioned further provide the benefit that: low cost, noise reduction effect are good.
Further, between maximum height is blade body thickness to five/20th point to the two of projection.
Further, the wall thickness of the first side wall and the wall thickness of the second sidewall are equal；The wall thickness of the first side wall or the second sidewall is
Between 1st/to five/50th of blade body thickness；The wall length of the first side wall and the wall length of the second sidewall are equal；The
Between a length of the first side wall of wall of one sidewall or the second sidewall or two times to six times of the wall thickness of the second sidewall.
Further, the number of degrees of the angle that the first side wall and the second sidewall are formed in crossing place are 31 degree.
Use and above-mentioned further provide the benefit that: noise reduction effect is good.
Further, the camber line that a side is evagination of the blade tip of blade body, another side is the camber line of indent.
Use and above-mentioned further provide the benefit that: reduce the eddy current at blade tip.
The technical scheme is that a kind of rotor wing unmanned aerial vehicle, including above-mentioned quiet oar
Leaf；Also include the electric machine structure for connecting quiet blade；Electric machine structure is arranged on the horn of unmanned plane；Quiet blade is arranged
On the outfan of electric machine structure；Electric machine structure includes motor cabinet, connecting tube, two motors；Two motor output ends are respectively provided with
There is quiet blade；Motor cabinet includes holding frame, two mounting seats；The two ends being arranged on holding frame that two mounting seats are corresponding, and
It is connected together between mounting seat and holding frame；Two corresponding being arranged in two mounting seats of motor；Connecting tube includes polygon
Body, connect seat；Connect seat to be fastened in the mouth of pipe of body one end；Body is plugged on holding frame away from the one end connecting seat
In；Holding frame is provided with the installing hole matched with body；The shape of cross section of body is identical with the shape of cross section of installing hole；
The shape of cross section of body tube chamber is identical with the shape of cross section of body.
The invention has the beneficial effects as follows: use and arrange two quiet blades and two motors, improve the flight of unmanned plane
Speed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention；
Fig. 2 is enlarged drawing at A in Fig. 1；
Fig. 3 be in Fig. 1 C-C to schematic diagram；
Fig. 4 is the structural representation of Fig. 2 protrusions；
The sine waveform figure that Fig. 5 is constituted by projection；
Fig. 6 is that the first side wall and the second sidewall form angle to effect of noise graph of a relation in crossing place；
Fig. 7 is the summation of protruding floor space and the comparison effect of noise graph of a relation installing protruding region area；
Fig. 8 is the structural representation of electric machine structure of the present invention；
Fig. 9 is the side view of Fig. 8；
Figure 10 is the top view of Fig. 8；
Figure 11 is the structural representation of motor cabinet in Fig. 8；
Figure 12 is the structural representation of connecting tube in Fig. 8；
Figure 13 is the side view of Fig. 8 middle tube body.
In accompanying drawing, the list of parts representated by each label is as follows:
1, motor cabinet, 2, connecting tube, 3, motor, 11, holding frame, 12, mounting seat, 13, installing hole, 21, body, 22, even
Joint chair, 23, skewed slot, 24, connecting hole；25, end cap, 26, draw-in groove, 101, tenon portion, 102, slot, the 103, first through hole, 104,
Trip bolt, 105, trip bolt hole, 106, trip bolt cross groove, 1001, left side wall, 1002, right side wall, 1003, first prolongs
Extending portion, the 1004, second extension, the 1005, the 3rd extension, the 1006, the 4th extension, 1007, roof, 1008, diapire,
1009, routing hole, 1010, wiring groove；211, the first side wall, the 212, second sidewall, the 213, the 3rd sidewall, the 214, the 4th sidewall,
215, the 5th sidewall, the 216, the 6th sidewall, 217, heptalateral wall, the 218, the 8th sidewall, 4, protruding, 401, the first side wall, 402,
Second sidewall, 5, blade body, 501, the camber line of evagination, 502, the camber line of indent, 6, serrated slot, 7, sawtooth.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
Non-for limiting the scope of the present invention.
The present invention provides a kind of quiet blade, including blade body 5；In order to reduce blade in rotation process because cutting
The noise cutting air-flow and produce, as it is shown in figure 1, in the present embodiment, blade body 5 uses bionics--birds wing, at blade
The trailing edge of body 5 has multiple serrated slot 6 not waited, and is formed multiple between multiple serrated slot 6 and blade bodies 5 not waited
Away from sawtooth 7, and then reduce the function of noise, and use the sawtooth 7 of multiple Unequal distance to cut, on the one hand to rotary course
The maelstrom cutting of middle generation is carded to countless little eddy current, on the other hand, has the viscosity air-flow of blade body 5 suction surface
Effect separates, and guide effect causes and becomes desired airflow.Tooth pitch 7, in the gap of blade body 5 blade tip to blade body 5 leaf tail by
Dredge to close.
In order to the air-flow entering into blade body 5 suction surface is further processed, at the suction surface of blade body 5
On be bonded with microarray diaphragm structure；As in figure 2 it is shown, microarray diaphragm structure is made up of the projection 4 that some length are different；Protruding
4 is one-body molded with blade body 5.In the present embodiment, by projections 4 different for some length on blade body 5 along blade
The length direction of body 5 is arranged into some row.As it is shown on figure 3, each column comprises 24 projections 4, and 24 of each column
Protruding 4 arrange according to sinusoidal wave waveform, and 24 projections 4 of each column just constitute the sine of two complete cycles
Ripple, the direction wherein arranged is the width of blade body 5.The arrangement mode of blade body 5 length direction is as in figure 2 it is shown, front
String is separated by a distance with rear string, and its intervening gaps is between 2 times to 4 times of protruding 4 Breadth Maximums, according to many experiments
Draw, when intervening gaps is 2.2 times for optimum.In addition stagger up and down between previous column and rear string, as in figure 2 it is shown, this
Arrangement mode makes the projection 4 that some length is different constitute zigzag, this zigzag row at the length direction of blade body 5
Air-flow can be split by row mode, reduces noise.Additionally, the projection 4 of every string is all to carry out according to sinusoidal wave waveform
Arrangement, when air-flow is flowed through protruding 4 by the trailing edge of blade body 5, can form the flowing of low speed rotation between protruding 4, work as stream
Body along blade body 5 suction surface flow time, suction surface can be flow through from protruding 4 tops, form whirlpool pad effect, make nearly suction surface turbulent flow
Intensity reduces, and the loss of tubulence energy reduces；And increase the thickness of viscous sublayer on blade body 5 suction surface, reduce suction surface attached
Velocity gradient near field, thus lower the noise that blade body 5 causes when rotated because of air-flow.
In order to enable further to reduce noise, the structure of protruding 4 can be done following design: protruding 4 in class zigzag
Structure, the pointed part of class zigzag structure is all towards the trailing edge of blade body 5；As shown in Figure 4, the projection of class zigzag structure
4 include that the first side wall the 401, second sidewall 402, the first side wall 401 and the second sidewall 402 are symmetrical arranged, and the first side wall 401
One end is intersected with one end of the second sidewall 402；The first side wall 401 and the second sidewall 402 form the angle of 31 degree in intersection, this
The projection 4 planting structure can play the effect being equal to sawtooth 7, reaches the effect of noise abatement.
The first side wall 401 and the second sidewall 402 form angle to effect of noise relation as shown in Figure 6 in crossing place,
Wherein X-axis is the number of degrees, and Y-axis is noise reduction rate percentage ratio, and noise reduction rate percentage ratio is that the noise before arranging protruding 4 deducts and arranges protruding 4
Noise afterwards, again divided by the noise arranged before protruding 4, draw through many experiments, when the first side wall 401 and the second sidewall
When 402 angles formed in crossing place are 31 degree, noise reduction rate is maximum.
During as it is shown in figure 1, arrange protruding 4 on blade body 5, the zone length that blade body 5 arranges projection 4 is less than
The zone length of serrated slot 6 is set on blade body 5.
As in figure 2 it is shown, when the projection 4 arranged on blade body 5 is distributed, the projection 4 different by some length
The line space of the microarray diaphragm structure constituted is equal；The microarray diaphragm knot being made up of the projection 4 that some length are different
The column pitch of structure is equal.
The major parameter of microarray diaphragm structure includes that height, wall thickness and protruding 4 of protruding 4 are on blade body 5
Coverage density ρ, wherein, protruding 4 coverage densities ρ on blade body 5 refer to the area of distribution protruding 4 on blade body 5
With the ratio of the area of blade body 5, the span after these three parameter optimization is as follows:
Maximum height is blade body 5 thickness 1/5th of protruding 4；
The wall thickness of the first side wall 401 and the wall thickness of the second sidewall 402 are equal；The first side wall 401 or the wall of the second sidewall 402
Thickness is 1st/25th of blade body 5 thickness；The wall length of the first side wall 401 and the wall length of the second sidewall 402 are equal；First
Between a length of the first side wall of wall 401 of sidewall 401 or the second sidewall 402 or four times of the wall thickness of the second sidewall 402；
Coverage density ρ: the protruding area of 4 of distribution and the area ratio of blade body 5 are between 10-40%.
The protruding area of 4 of distribution with the area ratio of blade body 5 to effect of noise relation as it is shown in fig. 7, according to many
Secondary experiment show that the protruding area of 4 of distribution is preferably 23.5% with the area ratio of blade body 5, in coverage density ρ is
When 23.5%, its noise reduction effect is the most obvious, although coverage density ρ continues growth still can improve noise reduction effect, but
Coverage density ρ is the biggest, and production cost is the highest, when in view of both common effects, and the preferably coverage density of 23.5%.
In order to reduce blade body 5 noise when rotated, blade body 5 is done and improves as follows:
The camber line that one side is evagination 501 of the blade tip of blade body 5, another side is the camber line 502 of indent.
It is illustrated with the thickness of blade body 5 for 2.5mm:
Now, the maximum height of protruding 4 is 500um, and the wall thickness of the first side wall 401 and the second sidewall 402 is 100um, the
One sidewall 401 and a length of 400um of wall of the second sidewall 402.
The sinusoidal wave function formula of microarray diaphragm structure is: y=Asin (ω x+ φ)+b, wherein, the value of b is
The value of 250um, A be the value of 125um, ω be 1, then sinusoidal wave function formula is: y=125sin (x+ pi/2 8)+250, as
Shown in Fig. 5.
As shown in Fig. 8, Fig. 9, Figure 10, a kind of rotor wing unmanned aerial vehicle, including quiet blade；Also include for connecting quiet blade
Electric machine structure；Electric machine structure is arranged on the horn of unmanned plane；Quiet blade is arranged on the outfan of electric machine structure；Motor
Structure includes motor cabinet 1,2, two motors 3 of connecting tube, and motor cabinet 1 includes 11, two mounting seats 12 of holding frame；Two mounting seats
The two ends being arranged on holding frame 11 of 12 correspondences, and be connected together between mounting seat 12 and holding frame 11, in each mounting seat 12
On all fix motor 3；Connecting tube 2 includes body 21, connects seat 22, and wherein, the one end connecting seat 22 is fastened on body 21 one end
The mouth of pipe in, body 21 away from connect seat 22 one end be plugged on holding frame 11.
As shown in Fig. 8, Figure 12, the shape of cross section of body 21 can be hexagon, octagon or dodecagon, this enforcement
Example illustrates with body 21 shape of cross section for octagon:
As shown in figure 11, holding frame 11 is provided with the octagonal installing hole 13 identical with body 21 shape of cross section,
One end of body 21 is positioned at installing hole 13；Connection seat 22 is positioned at shape of cross section and body 21 tube chamber of the part of body 21
Shape of cross section identical, be octagon.Screw is used to carry out between body 21 and holding frame 11 in installing hole 13
It is fastenedly connected.
As shown in figure 11, the concrete structure being connected together between mounting seat 12 and holding frame 11 is: holding frame about 11 two
End is equipped with and projects outwardly of tenon portion 101 from this holding frame 11 end face, and the shape of cross section of tenon portion 101 is swallow-tail form or T-shaped,
In the present embodiment, the shape of cross section with tenon portion 101 illustrates for swallow-tail form；Corresponding being provided with and tenon portion in mounting seat 12
The slot 102 that 101 match, slot 102 is in order to suitable with tenon portion 101, and the shape of cross section of slot 102 is dovetail
Shape, tenon portion 101 snaps in the slot 102 of correspondence.
As shown in figure 11, the concrete structure of holding frame 11 is: holding frame 11 includes left side wall 1001, right side wall 1002；Left
The upper end of sidewall 1001 and right side wall 1002 bends towards the direction of its opposing sidewalls respectively and extends, and forms the first extension
1003 and second extension 1004；The bottom of left side wall 1001 and right side wall 1002 is curved towards the direction of its opposing sidewalls respectively
Folding extends, and forms the 3rd extension 1005 and the 4th extension 1006；The upper end of the first extension 1003 is towards horizontal direction
Bending extends, and is crossed to form roof 1007 with the second extension 1004；The bottom of the 3rd extension 1005 is towards level side
Extend to bending, and be crossed to form diapire 1008 with the 4th extension 1006；Left side wall 1001, right side wall 1002, first extend
Portion's the 1003, second extension the 1004, the 3rd extension the 1005, the 4th extension 1006, roof 1007 and diapire 1008 enclose
Octagonal installing hole 13 described in formation；Left side wall the 1001, first extension the 1003, the 3rd extension 1005 forms class X word
The structure of shape；Right side wall the 1002, second extension the 1004, the 3rd extension 1005 forms the structure of class X font；Tenon portion 101
On diapire 1008 and roof 1007.
As shown in figure 11, it is also possible to holding frame 11 is carried out following improvement:
First extension the 1003, second extension the 1004, the 3rd extension the 1005, the 4th extension at holding frame 11
Being respectively provided with the first through hole 103 running through this extension on 1006, the contour shape of the first through hole 103 is class triangle.
Four trip bolt holes 105 are set in mounting seat 12, and at each trip bolt hole 105, are equipped with a fastening
Groove 106 crossed by screw；Mounting seat 12 is fastenedly connected with motor 3 by four trip bolts 104, and each trip bolt 104 both passes through
Corresponding trip bolt hole 105.
Diapire 1008 and roof 1007 are equipped with a routing hole 1009, routing hole on the installed surface connecting motor 3
1009 centers being positioned at installed surface；Diapire 1008 is provided with wiring groove with on roof 1007 at the end face relative with motor 3 installed surface
1010, the setting direction of wiring groove 1010 is identical with the direction of tenon portion 101；Routing hole 1009 is connected with wiring groove 1010；Cloth
Wire casing 1010 two ends are all in opening.
Body 21 can also be carried out following improvement:
As shown in Fig. 8, Fig. 9, Figure 12, body 21 is arranged with end cap 25, body in the mouth of pipe away from the one end connecting seat 22
On 21, relevant position is provided with draw-in groove 26, and wherein one end of draw-in groove 26 is opening-like.
As shown in figure 13, body 21 is eight-sided formation, including eight sidewalls, and respectively the first side wall the 211, second sidewall
212, the 3rd sidewall 213, the 4th sidewall 214, the 5th sidewall 215, the 6th sidewall 216, heptalateral wall 217, the 8th sidewall 217；
The first side wall the 211, second sidewall 212, the 3rd sidewall 213, the 4th sidewall 214, the 5th sidewall 215, the 6th sidewall 216, the 7th
Sidewall 217, the 8th sidewall 217 is symmetrical；Body 21 is provided with on the 3rd sidewall 213 and heptalateral wall 217 and some runs through this
The skewed slot 23 of side pipe wall, the region of the skewed slot 23 that the 3rd sidewall 213 and heptalateral wall 217 are offered is equal.It is not precluded from
Arrange on the first side wall the 211, the 5th sidewall 215 and on skewed slot 23, or the second sidewall the 212, the 6th sidewall 216, skewed slot 23 be set,
Or arranging skewed slot 23 on the 4th sidewall the 214, the 8th sidewall 217, the present embodiment is preferably at the 3rd sidewall 213 and heptalateral wall
Arranging skewed slot 23 on 217, its main cause is, it is easy to processing, and area of dissipation is big.
The quantity that skewed slot 23 is arranged is directly proportional to above-mentioned coverage density ρ, and coverage density ρ is the biggest, the number that skewed slot 23 is arranged
Measuring the most, coverage density ρ is the least, and the quantity that skewed slot 23 is arranged is the fewest, and skewed slot 23 is possible not only to play above-mentioned thermolysis, also
The quiet effect matched with quiet blade can be played.
Skewed slot 23 on body 21 can also be improved as follows:
The spacing between adjacent two skewed slots 23 on same sidewall is equal, and skewed slot 23 is carried out the most in the same direction
Tilting, in the present embodiment, the incline direction of skewed slot 23 is all towards connecting seat 22, and angle of inclination is between 0-45 degree.According to repeatedly real
Test and draw, when the angle of inclination of skewed slot 23 is 15 degree for optimum, its main cause be easy to process, area of dissipation is big.
Between on same sidewall 2-4 times that spacing is skewed slot 23 groove width between adjacent two skewed slots 23.According to
Many experiments draws, for optimum during between adjacent two skewed slots 23 2.5 times that spacing is skewed slot 23 groove width, its main cause is
In same area, it is possible to more skewed slot 23 is set, improve thermal diffusivity, be the most also avoided that when body 21 uses two phases
There is fractureing or ruptures occur that fractureing or the reason ruptured are in the adjacent part between skewed slot 23, two skewed slot 23 spacing are too small,
The rigidity causing part between two skewed slots 23 is inadequate.
The groove width of skewed slot 23 is between 1-3 times of body 21 wall thickness.Drawing according to many experiments, the groove width of skewed slot 23 is pipe
Be optimum during 1.5 times of body 21 wall thickness, if its main cause is skewed slot 23 offer excessive, the body 21 rigidity at skewed slot 23
Less, body 21 frangibility or rupture, and preferably 1.5 times, be to allow the groove width of skewed slot 23 offer while guaranteeing rigidity
Maximum.
Skewed slot 23 on 3rd sidewall 213 and heptalateral wall 217 is when offering, and the length of skewed slot 23 is less than the 3rd sidewall
213 or the wall width of heptalateral wall 217, it is to avoid skewed slot 23 is offered on adjacent sidewall, facilitates the processing of skewed slot 23, it is to avoid impact
The rigidity of the junction of adjacent two sidewalls.
Body 21 uses composite to make；Described composite includes that carbon fibre composite, glass fibre are compound
Material or honeycomb sandwich composite.
Connect seat 22 for convenience to be connected with body, connect seat 22 and be provided with connecting hole 24, connect and connecting on seat 22
It is provided with yielding groove at hole 24, conveniently connection seat 22 is connected with body.
If the multiple proportion between table 1, the groove width of skewed slot and body wall thickness is on the impact of body rigidity and to thermal diffusivity
Impact.
Table 1
| Multiple between groove width and the body wall thickness of skewed slot | Body rigidity | Body thermal diffusivity |
| 0.5 times | The highest | Difference |
| 1.5 again | Higher | Good |
| 2 times | High | Very well |
| 4 times | Low | The best |
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. a quiet blade, it is characterised in that include blade body (5)；The trailing edge of described blade body (5) have multiple not
Deng serrated slot (6), form the saw of multiple Unequal distance between the plurality of serrated slot (6) and the described blade body (5) not waited
Tooth (7)；It is bonded with microarray diaphragm structure on the suction surface of described blade body (5)；Described microarray diaphragm structure is by some
The projection (4) that length is different is constituted；Described projection (4) is one-body molded with described blade body (5)；Described some length is different
Protruding (4) arrange with sinusoidal wave form at the width of described blade body (5)；Described projection (4) is tied in class zigzag
Structure, the pointed part of described class zigzag structure is all towards the trailing edge of described blade body (5)；Described class zigzag structure convex
Play (4) and include that the first side wall (401), the second sidewall (402), described the first side wall (401) and the second sidewall (402) symmetry set
Put, and one end of described the first side wall (401) is intersected with one end of described second sidewall (402)；Described the first side wall (401) and
Second sidewall (402) is at a certain angle in intersection shape；Described angle is in the range of between 15 degree～75 degree.
The quiet blade of one the most according to claim 1, it is characterised in that the projection (4) that described some length are different
Length direction described blade body (5) is arranged into zigzag.
The quiet blade of one the most according to claim 2, it is characterised in that the projection (4) that described some length are different
At the sine wave being shaped as two complete cycles that the width of described blade body (5) is arranged；One complete cycle
Sine wave comprises 12 projections (4).
The quiet blade of one the most according to claim 3, it is characterised in that on described blade body (5), projection (4) is set
Zone length less than the zone length arranging serrated slot (6) on described blade body (5).
The quiet blade of one the most according to claim 4, it is characterised in that be distributed projection (4) on described blade body (5)
Area and the area ratio of blade body (5) be between 10-40%.
6. according to the arbitrary described quiet blade of one of claim 1 to 6, it is characterised in that the maximum height of described projection (4)
Between 1 to five/20th point to the two of described blade body (5) thickness.
The quiet blade of one the most according to claim 1, it is characterised in that the wall thickness of described the first side wall (401) and
The wall thickness of two sidewalls (402) is equal；The wall thickness of described the first side wall (401) or the second sidewall (402) is described blade body (5)
Between 1st/to five/50th of thickness；The wall length of described the first side wall (401) and the wall appearance of the second sidewall (402)
Deng；The a length of described the first side wall of the wall (401) of described the first side wall (401) or the second sidewall (402) or the second sidewall (402)
Between two times to six times of wall thickness.
The quiet blade of one the most according to claim 1, it is characterised in that described the first side wall (401) and the second sidewall
(402) number of degrees of the angle formed in crossing place are 31 degree.
The quiet blade of one the most according to claim 7, it is characterised in that the side of the blade tip of described blade body (5)
While be the camber line (501) of evagination, another side is the camber line (502) of indent.
10. a rotor wing unmanned aerial vehicle, it is characterised in that include the described quiet blade of any one of claim 1 to 9；Also include
For connecting the electric machine structure of described quiet blade；Described electric machine structure is arranged on the horn of unmanned plane；Described quiet blade
It is arranged on the outfan of described electric machine structure；Described electric machine structure includes motor cabinet (1), connecting tube (2), two motors (3)；
Two motor (3) outfans are provided with described quiet blade；Described motor cabinet (1) includes holding frame (11), two mounting seats
(12)；The two ends being arranged on described holding frame (11) that said two mounting seat (12) is corresponding, and described mounting seat (12) and institute
State and be connected together between holding frame (11)；Corresponding being arranged in said two mounting seat (12) of said two motor (3)；Described
Connecting tube (2) includes polygonal body (21), connects seat (22)；Described connection seat (22) is fastened on described body (21) one end
The mouth of pipe in；Described body (21) is plugged in described holding frame (11) away from the one end connecting seat (22)；Described holding frame
(11) installing hole (13) matched with described body (21) it is provided with；The shape of cross section of described body (21) and described installation
The shape of cross section in hole (13) is identical；The shape of cross section of described body (21) tube chamber and the shape of cross section of described body (21)
Identical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610471833.5A CN106114850B (en) | 2016-06-23 | 2016-06-23 | A kind of mute blade and the rotor wing unmanned aerial vehicle containing it |
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| CN201610471833.5A CN106114850B (en) | 2016-06-23 | 2016-06-23 | A kind of mute blade and the rotor wing unmanned aerial vehicle containing it |
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| CN106114850A true CN106114850A (en) | 2016-11-16 |
| CN106114850B CN106114850B (en) | 2018-08-21 |
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| CN111071272A (en) * | 2019-12-27 | 2020-04-28 | 同济大学 | Obstacle deflector with pit arranged at rear end of bottom and application thereof |
| CN113859296A (en) * | 2021-10-26 | 2021-12-31 | 同济大学 | Obstacle deflector with passive turbulent flow structure and application thereof |
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