Rotor structure and flying car with good noise reduction effect

Abstract

The application relates to the field of rotors, in particular to a rotor structure with good noise reduction effect and a flying car. The rotor structure with good noise reduction effect comprises a bionic convex and a rotor body, the bionic convex comprises a rotating side and a round corner side, the rotating side is connected with a driving structure, and the round corner side is in contact with a spring, the bionic convexes are arranged in an array at the tail end of the rotor body, and the rotor body is also provided with rotor holes in an array for placing the bionic convexes and the springs. The bionic convexes can be extended at low speed, so that the rotor is subjected to noise reduction, and the bionic convexes can be retracted at high speed, so that the noise of the flying car can be reduced, sound pollution can be reduced, and the application prospect is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotor wind noise, in particular to a rotor structure with good noise reduction effect and a flying car. BACKGROUND

[0002] Traffic congestion problems and the development of automation technology promote the rapid development of urban air traffic (UAM), and the rotor is an important part of the flying car. The movement of the rotor in the air will produce complex flow phenomena such as turbulence, vortex, etc., which will cause changes in air pressure and thus produce noise. In order to meet the comfort requirements of the public and popularize flying cars in the future, it is necessary to reasonably design the rotor structure to achieve noise reduction effect.

[0003] At present, the research on airfoil noise reduction is relatively rich, and bionic noise reduction by drawing on the structure, function and mechanism of organisms in the biological world is a new method that attracts much attention. Existing bionic noise reduction structures mainly include trailing edge serrations, leading edge waves, leading edge protrusions and surface grooves. The noise reduction effect of these structures and the additional noise generated by the structures themselves are highly dependent on the rotor speed, and some structures can only reduce noise under certain working conditions, and may even increase noise when the working conditions change. SUMMARY

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] A rotor structure with good noise reduction effect, comprising a bionic protrusion and a rotor body, the bionic protrusion comprising a rotating side and a rounded side, the rotating side being connected to a driving structure and the rounded side being in contact with a spring, the bionic protrusion array being arranged at the tail end of the rotor body, and the rotor body further having rotor holes arrayed for placing the bionic protrusion and the spring.

[0006] As a further scheme of the present application: the spring comprises a spring platform and a spring body, the normal spring-up length of the spring being greater than the length of the rotor hole, the longitudinal cross-sectional shape of the rotor hole and the spring platform being a reverse T shape and being gap fitted, the cross-sectional shape of the rotor hole and the cross-sectional shape of the protruding part of the spring platform being consistent, and the spring being capable of being clamped into the rotor hole when springing up.

[0007] As a further scheme of the present application: the rounded side is in the shape of a reverse rounded corner, which can prevent wear and tear, and the bionic protrusion is in the shape of a fish fin protrusion.

[0008] As a further scheme of the present application: the cross-sectional shape of the rotor hole and the shape of the two side surfaces of the bionic protrusion are consistent, which ensures that the rotor surface has no obvious uneven structure when the rotor rotates at high speed and is closed.

[0009] As a further scheme of the present application: the driving structure comprises a rack, a plurality of gears and rotating columns, each gear is fixedly connected with a rotating column, the rack is engaged with the gears, and the rotating columns are connected with the rotating side; when the rack is translated, the gears, the rotating columns and the bionic protrusions are all rotated.

[0010] As a further scheme of the present application: the cross section of the rotor hole is consistent with the shape of the spring platform protruding part, so that the surface of the rotor is smooth when the rotor rotates at low speed and the device is opened.

[0011] A flying car comprises a car body and other equipment, and further comprises the rotor structure with good noise reduction effect.

[0012] Compared with the prior art, the present application has the following beneficial effects:

[0013] 1. The bionic protrusions can be opened and closed by the driving structure and the spring according to different rotor rotating speeds, the influence of the rotating speed on the rotor is considered, and the aerodynamic noise can be reduced as much as possible under different working conditions.

[0014] 2. The cross section of the rotor hole is consistent with the shape of the spring platform protruding part, that is, the remaining surface of the rotor can be smooth when the bionic protrusion is opened, and no other vortex is generated.

[0015] 3. The cross section of the rotor hole is consistent with the shape of the two side surfaces of the bionic protrusion, that is, the surface of the rotor can be smooth when the bionic protrusion is retracted, and no other vortex is generated.

[0016] 4. The rounded side of the bionic protrusion is provided with a fillet, so that when the rounded side extrudes the spring, less wear is left on the spring, and the service life is improved.

[0017] 5. The rotor hole and the spring platform are in inverted T shape, and the normal spring-up length of the spring is greater than the length of the rotor hole, so that the protruding part of the spring platform can be as close as possible to the rotor hole when the bionic protrusion is opened, and the surface of the rotor is further smooth, and no other vortex is generated.

[0018] 6. The driving structure can drive the rotation of the plurality of gears, rotating columns and bionic protrusions only by the translational movement of the rack, so that all the bionic protrusions can be opened or closed at the same time, and the energy consumption can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure diagram of the rotor structure with good noise reduction effect rotating at low speed in the embodiment of the present application.

[0020] Figure 2 It is a structure diagram of the rotor structure with good noise reduction effect rotating at high speed in the embodiment of the present application.

[0021] Figure 3The structural diagram of the driving structure used in the rotor structure with good noise reduction effect in the embodiment of the present application.

[0022] Figure 4 The array shape schematic diagram of the bionic protrusion in the rotor structure with good noise reduction effect in the embodiment of the present application.

[0023] Figure 5 The influence schematic diagram of the bionic protrusion array in the rotor structure with good noise reduction effect at different rotating speeds on the total sound pressure level of the rotor circumferential direction.

[0024] In the figure: 1-bionic protrusion, 11-round corner side, 12-rotating side, 2-rotor hole, 3-spring platform, 4-spring body, 5-rotor body, 6-rotating column, 7-gear, 8-rack. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0026] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0027] Please refer to Figures 1-5 The rotor structure with good noise reduction effect provided by the embodiment of the present application comprises a bionic protrusion 1 and a rotor body 5. The bionic protrusion 1 is divided into a round corner side 11 and a rotating side 12. The rotating side 12 is connected with a driving structure, and the round corner side 11 is in contact with a spring. The bionic protrusion 1 array is arranged at the tail end of the rotor body 5. The rotor body 5 is also arrayed with rotor holes 2 for placing the bionic protrusion 1 and the spring, as shown in Figure 4 and Figure 5 The height H, the maximum width W and the array spacing S of the bionic protrusion 1 can be designed according to different rotors. At a rotating speed of 3000 rpm, the wing type with the bionic protrusion 1 installed can almost realize circumferential noise reduction compared with the basic wing type. At a rotating speed of 5000 rpm, the bionic protrusion 1 will generate large vortex, which will instead increase the noise sound pressure level of the rotor at some angles.

[0028] As a preferred embodiment provided by the present application, the driving structure comprises a rotating column 6, a gear 7 and a rack 8. The spring comprises a spring platform 3 and a spring body 4. The rotating side 12 of the bionic protrusion 1 is connected with the rotating column 6. The shape of the round corner side 11 is a reverse round corner, which ensures that no abrasion is caused as much as possible when in contact with the spring platform 3, thereby improving the structure life.

[0029] As a preferred embodiment provided by the present application, the rotor hole 2 is used to place the spring platform 3 and the spring body 4, the longitudinal section shape of the spring platform 3 and the rotor hole 2 is a reverse T shape and is matched in clearance, the cross section shape of the rotor hole 2 is consistent with the cross section shape of the convex part of the spring platform 3, and the normal spring-up length of the spring body 4 is greater than the length of the rotor hole 2, which can ensure that the spring platform 3 can be just clamped into the rotor hole 2 when the bionic convex 1 is opened at low speed, reduce the wear, ensure that the rotor surface can be kept smooth, and reduce the vortex, preferably, the bionic convex 1 is a fish fin-shaped convex.

[0030] As a preferred embodiment provided by the present application, the round corner side 11 can be in contact with the spring platform 3 and can press the spring body 4 into the lower end of the rotor hole 2, the rotating side 12 of the bionic convex 1 is consistent with the shape of the rotor hole 2, which ensures that the rotor surface can be kept smooth at high speed and can reduce the vortex.

[0031] As a preferred embodiment provided by the present application, the gear 7 and the rotating column 6 in the driving structure are fixedly connected, and the gear 7 and the rack 8 are engaged. When the speed switching is performed, the rack 8 moves in a left-right translation mode, thereby driving the gear 7 and the rotating column 6 to rotate, and the rotating column 6 drives the bionic convex 1 to rotate.

[0032] The working principle of the present application is as follows:

[0033] When the rotor is switched from high speed to low speed, the rack 8 translates to the left side, which can drive the gear 7 and the rotating column 6 to rotate clockwise, thereby driving the bionic convex 1 to rotate out of the rotor hole 2 to the outer surface of the tail end of the rotor body 5, thereby achieving the effect of reducing the wind noise. At the same time, the spring platform 3 and the spring body 4 are not extruded by the bionic convex 1, and are bounced up from the bottom of the rotor hole 2 until they are clamped into the upper end of the rotor hole 2.

[0034] When the rotor is switched from low speed to high speed, the rack 8 translates to the right side, which can drive the gear 7 and the rotating column 6 to rotate counterclockwise, thereby driving the bionic convex 1 to rotate into the rotor hole 2 from the outer surface of the tail end of the rotor body 5, avoiding that the bionic convex 1 generates a larger vortex and noise at high speed. At the same time, the round corner side 11 of the bionic convex 1 will extrude the spring platform 3 in the rotating process, and press the spring platform 3 and the spring body 4 into the lower end of the rotor hole 2 until the rotating side 12 and the upper surface of the rotor hole 2 are completely attached.

[0035] A flying car, comprising a car body and other equipment, further comprising the rotor structure with good noise reduction effect as described above.

[0036] It should be noted that in the present application, unless otherwise explicitly specified and limited, the terms "rotation", "fixation", "provided with" and other terms should be understood in a broad sense, for example, can be welded connection, or bolted connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A rotor structure with good noise reduction effect, comprising a bionic protrusion and a rotor body, characterized in that, The bionic convex includes a rotating side and a rounded side, the rotating side is connected with the driving structure and the rounded side is in contact with the spring, the bionic convex array is arranged at the tail end of the rotor body, the rotor body is also arrayed with rotor holes for placing the bionic convex and the spring, the spring includes a spring platform and a spring body, the normal spring-up length of the spring is greater than the length of the rotor hole, the longitudinal section shape of the rotor hole and the spring platform is all inverted T shape and clearance fit, and the shape of the rotor hole cross section and the convex part of the spring platform is consistent.

2. The rotor structure according to claim 1, wherein The rounded side is in the shape of a rounded corner.

3. The rotor structure according to claim 1, wherein The cross section shape of the rotor hole and the shape of the two side faces of the bionic convex are consistent.

4. The rotor structure according to claim 1, wherein The driving structure includes a rack, a plurality of gears and rotating columns, each gear is fixedly connected with a rotating column, the rack is engaged with the gears, and the rotating columns are connected with the rotating sides.

5. A flying car comprising a vehicle body and other equipment, characterized by, The rotor structure with good noise reduction effect also includes the rotor structure as claimed in any one of claims 1-4.

Images