Vortex type double-heat-dissipation silencer of piston engine for unmanned aerial vehicle

Abstract

The invention provides a vortex type double-heat-dissipation silencer of a piston engine for an unmanned aerial vehicle. The vortex type double-heat-dissipation silencer comprises a main body, a first-stage heat dissipation and noise reduction channel, a second-stage heat dissipation and noise reduction channel and a third-stage heat dissipation and noise reduction channel are sequentially formed in the main body from outside to inside; an air inlet and a first communication port communicated with the second-stage heat dissipation and noise reduction channel are formed in the first-stage heat dissipation and noise reduction channel; a second communication port communicated with the third-stage heat dissipation and noise reduction channel is formed in the second-stage heat dissipation and noise reduction channel; a first air outlet is formed in the third-stage heat dissipation and noise reduction channel. Compared with the prior art, the vortex type double-heat-dissipation silencer of the piston engine for the unmanned aerial vehicle has the advantages that the heat dissipation and silencing paths are greatly increased through the multi-stage heat dissipation and silencing channels, gas spirally moves in cooperation with the design of the multiple vortex parts, speed reduction and cooling are achieved, and the good heat dissipation and silencing effects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to a vortex type double heat dissipation silencer for a piston engine of an unmanned aerial vehicle. Background Art

[0002] The actual application of turbojet engines for drones is relatively expensive, and the maintenance cost is high, so the scope of use is relatively small. Electric engines are now widely used in the consumer market, but they are short-lived and cannot be widely used in industrial or higher-level applications. Aviation piston engines for drones are widely used. The noise of aviation piston engines is mainly divided into two parts. One part is generated by the friction of air during the rotation of the propeller. The standard detection is 90-110 decibels. The other part is the combustion and explosion noise generated by the cylinder head of the piston engine when it is working. It is generated after the hot exhaust gas is discharged from the engine. The standard detection is 110-130 decibels. The superposition of these two noises can exceed 120 decibels. The noise generated by normal humans cannot be tolerated for a long time. According to examples, with a 150cc aviation piston engine without any muffler installed, a drone equipped with a piston engine flies in the air at a straight distance of 2,500 to 3,000 meters from the human ear. In a normal natural environment, the human ear can clearly hear the noise it produces.

[0003] At present, most of the aviation piston engines used in my country's drones are foreign brands and most of them are not equipped with silencers. Even if they are equipped with silencers, they are simple resistance silencers. Aviation piston engines used in domestic brand drones are basically not equipped with exhaust silencers, resulting in loud noise and high exhaust gas temperature. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide a vortex type double heat dissipation silencer for a piston engine of an unmanned aerial vehicle.

[0005] One embodiment of the present invention provides a vortex-type dual-heat dissipation silencer for a piston engine for a drone, comprising: a main body;

[0006] The main body is formed with a primary heat dissipation and silencing channel, a secondary heat dissipation and silencing channel and a tertiary heat dissipation and silencing channel from the outside to the inside;

[0007] The first-level heat dissipation and silencing channel is formed with an air inlet and a first communication port communicating with the second-level heat dissipation and silencing channel, and the first-level heat dissipation and silencing channel extends in a direction from the air inlet to the first communication port;

[0008] The secondary heat dissipation and silencing channel is formed with a second communication port communicating with the third-level heat dissipation and silencing channel, and the secondary heat dissipation and silencing channel extends in a direction from the first communication port to the second communication port;

[0009] The three-stage heat dissipation and silencing channel is formed with a first air outlet, and the three-stage heat dissipation and silencing channel extends along the direction from the second connecting port to the first air outlet.

[0010] In some optional embodiments, the primary heat dissipation and silencing channel is arranged around the secondary heat dissipation and silencing channel, and the secondary heat dissipation and silencing channel is arranged around the tertiary heat dissipation and silencing channel.

[0011] In some optional embodiments, a plurality of first vortex portions are provided in the first-stage heat dissipation and silencing channel, and the first vortex portions extend spirally around the second-stage heat dissipation and silencing channel in the extension direction of the first-stage heat dissipation and silencing channel.

[0012] In some optional embodiments, a plurality of second vortex portions are provided in the secondary heat dissipation and silencing channel, and the second vortex portions extend spirally around the tertiary heat dissipation and silencing channel in the extension direction of the secondary heat dissipation and silencing channel.

[0013] In some optional embodiments, a plurality of third vortex portions are provided in the third-stage heat dissipation and silencing channel, and the third vortex portions extend spirally in the extension direction of the third-stage heat dissipation and silencing channel.

[0014] In some optional embodiments, the main body is formed with the primary heat dissipation and silencing channel, the secondary heat dissipation and silencing channel, the tertiary heat dissipation and silencing channel and the intermediate channel in sequence from the outside to the inside;

[0015] The three-stage heat dissipation and silencer channel is further formed with a plurality of air distribution holes, and the air distribution holes are located between the second communication port and the first air outlet;

[0016] The middle channel is formed with a second air outlet.

[0017] In some optional embodiments, the first-level heat dissipation and silencing channel is formed with a plurality of the first communication ports, and the plurality of the first communication ports are evenly arranged around the second-level heat dissipation and silencing channel;

[0018] The secondary heat dissipation and silencing channel is formed with a plurality of the second communication ports, and the plurality of the second communication ports are evenly arranged around the tertiary heat dissipation and silencing channel.

[0019] In some optional embodiments, the first communication port extends along the extension direction of the primary heat dissipation and silencing channel, and the second communication port extends along the extension direction of the secondary heat dissipation and silencing channel.

[0020] In some optional embodiments, the main body is provided with an air intake passage connected to the air intake port and a conical diverter arranged in the air intake passage, the air intake port is arranged around the conical diverter, and the conical diverter gradually approaches the air intake port in the air intake direction of the air intake passage.

[0021] In some optional embodiments, the main body includes an outer sealing cover, a primary vortex tube, a secondary vortex tube, a tertiary vortex tube, a conical flow splitter, a sealing cover and a flow splitter stopper;

[0022] The outer closed cover, the first-stage vortex tube, the second-stage vortex tube, and the third-stage vortex tube are sequentially sleeved from the outside to the inside, the outer closed cover is formed with an air inlet channel, the closed cover is connected to the tail end of the outer closed cover, the tail end of the first-stage vortex tube, the tail end of the second-stage vortex tube, and the tail end of the third-stage vortex tube, the first-stage heat dissipation and silencer channel is formed between the outer closed cover and the first-stage vortex tube, the second-stage heat dissipation and silencer channel is formed between the first-stage vortex tube, the second-stage vortex tube, the conical splitter and the closed cover, and the third-stage heat dissipation and silencer channel is formed between the outer closed cover and ... The diverter limiter is formed between the secondary vortex tube, the tertiary vortex tube, the conical diverter and the closing cover, the diverter limiter is fixedly connected to the outer closing cover, the diverter limiter presses the conical diverter toward the head end of the secondary vortex tube and the head end of the tertiary vortex tube, the diverter limiter forms the air inlet channel, at least part of the conical diverter is located in the air inlet channel, the air inlet is connected to the air inlet channel and is arranged around the conical diverter, and the conical diverter gradually approaches the air inlet in the air inlet direction of the air inlet channel.

[0023] Compared with the prior art, the vortex-type double heat dissipation silencer for the piston engine of the UAV of the present invention uses a multi-stage heat dissipation and silencer channel, thereby greatly increasing the heat dissipation and silencer path. Combined with the design of multiple vortex parts, the gas spirally moves to achieve speed reduction and temperature reduction, achieving better heat dissipation and silencer effect.

[0024] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a vortex-type double-heat dissipation silencer for a piston engine for a UAV according to an embodiment of the present invention;

[0026] Figure 2 A cross-sectional view of a vortex-type double-heat dissipation silencer for a piston engine for a UAV according to an embodiment of the present invention;

[0027] Figure 3This is an exhaust gas flow diagram of a vortex type double heat dissipation silencer for a piston engine for a UAV according to an embodiment of the present invention;

[0028] Figure 4 An exploded view of a vortex-type double-heat dissipation silencer for a piston engine for a UAV according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a primary vortex tube according to an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the structure of a two-stage vortex tube according to an embodiment of the present invention;

[0031] Figure 7 The figure is a schematic structural diagram of a three-stage vortex tube according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 10. Main body; 11. Conical diverter; 12. Outer closure cover; 13. Primary vortex tube; 14. Secondary vortex tube; 15. Thirdary vortex tube; 16. Closing cover; 161. Converging air outlet; 17. Diverter limiter; 20. Primary heat dissipation and silencer channel; 21. Air inlet; 22. First connecting port; 23. First vortex part; 30. Secondary heat dissipation and silencer channel; 31. Second connecting port; 32. Second vortex part; 40. Thirdary heat dissipation and silencer channel; 41. First air outlet; 42. Third vortex part; 50. Intermediate channel; 51. Air distribution hole; 60. Air inlet channel. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Figure 1 One embodiment of the present invention provides a vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle, comprising: a main body 10.

[0035] See also Figure 2 The main body 10 is sequentially formed with a primary heat dissipation and silencing channel 20, a secondary heat dissipation and silencing channel 30 and a tertiary heat dissipation and silencing channel 40 from the outside to the inside; the primary heat dissipation and silencing channel 20 is formed with an air inlet 21 and a first connecting port 22 connected to the secondary heat dissipation and silencing channel 30, and the primary heat dissipation and silencing channel 20 extends in a direction from the air inlet 21 to the first connecting port 22; the secondary heat dissipation and silencing channel 30 is formed with a second connecting port 31 connected to the tertiary heat dissipation and silencing channel 40, and the secondary heat dissipation and silencing channel 30 extends in a direction from the first connecting port 22 to the second connecting port 31; the tertiary heat dissipation and silencing channel 40 is formed with a first air outlet 41, and the tertiary heat dissipation and silencing channel 40 extends in a direction from the second connecting port 31 to the first air outlet 41.

[0036] See also Figure 3 The exhaust gas generated by the piston engine passes through the air inlet 21, the first heat dissipation and silencer channel 20, the first connecting port 22, the second heat dissipation and silencer channel 30, the second connecting port 31 and the third heat dissipation and silencer channel 40 in sequence, and then is discharged from the first air outlet 41. The exhaust gas needs to pass through multiple heat dissipation and silencer channels, and also needs to turn back and forth several times, which is conducive to the deceleration of the exhaust gas and the realization of noise reduction. The exhaust gas first reaches the first heat dissipation and silencer channel 20 closest to the outside of the main body 10, which is conducive to the heat dissipation of the first heat dissipation and silencer channel 20 with more heat.

[0037] The design of the first-stage heat dissipation and silencer channel 20, the second-stage heat dissipation and silencer channel 30 and the third-stage heat dissipation and silencer channel 40 allows multiple heat dissipation and silencer channels to be superimposed in the main body 10 of limited length, thereby greatly increasing the heat dissipation and silencer path, extending the residence time of the exhaust gas in the vortex double heat dissipation silencer of the piston engine for the drone, and the heat can be fully transferred to the main body, thereby effectively achieving noise reduction and temperature reduction.

[0038] In some optional embodiments, the primary heat dissipation and silencing channel 20 is arranged around the secondary heat dissipation and silencing channel 30, and the secondary heat dissipation and silencing channel 30 is arranged around the tertiary heat dissipation and silencing channel 40, thereby effectively increasing the width of the primary heat dissipation and silencing channel 20, the secondary heat dissipation and silencing channel 30, and the tertiary heat dissipation and silencing channel 40, which is conducive to increasing the contact area between the exhaust gas and the main body 10, so that heat is effectively transferred. Moreover, this design makes the exhaust gas flow more uniform.

[0039] In some optional embodiments, a first vortex portion 23 is provided in the primary heat dissipation and silencer channel 20, and the first vortex portion 23 spirally extends around the secondary heat dissipation and silencer channel 30 in the extension direction of the primary heat dissipation and silencer channel 20. The first vortex portion 23 guides the exhaust gas to flow in the primary heat dissipation and silencer channel 20 in a spiral manner, so that the exhaust gas reduces the flow velocity to achieve noise reduction, increases the flow path and residence time of the exhaust gas in the primary heat dissipation and silencer channel 20, so that the heat is fully transferred to the main body 10, and the first vortex portion 23 can also help increase the contact area between the exhaust gas and the main body 10, thereby facilitating heat dissipation.

[0040] In some optional embodiments, a second vortex portion 32 is provided in the secondary heat dissipation and silencer channel 30, and the second vortex portion 32 spirally extends around the tertiary heat dissipation and silencer channel 40 in the extension direction of the secondary heat dissipation and silencer channel 30. The second vortex portion 32 guides the exhaust gas to flow in the secondary heat dissipation and silencer channel 30 in a spiral manner, so that the exhaust gas reduces the flow velocity to achieve noise reduction, increases the flow path and residence time of the exhaust gas in the secondary heat dissipation and silencer channel 30, so that the heat is fully transferred to the main body 10, and the second vortex portion 32 can also help increase the contact area between the exhaust gas and the main body 10, thereby facilitating heat dissipation.

[0041] In some optional embodiments, a third vortex portion 42 is provided in the third-stage heat dissipation and silencer channel 40, and the third vortex portion 42 spirally extends in the extension direction of the third-stage heat dissipation and silencer channel 40. The third vortex portion 42 guides the exhaust gas to spirally flow in the third-stage heat dissipation and silencer channel 40, so that the exhaust gas reduces the flow velocity to achieve noise reduction, increases the flow path and residence time of the exhaust gas in the third-stage heat dissipation and silencer channel 40, so that the heat is fully transferred to the main body 10, and the third vortex portion 42 can also help increase the contact area between the exhaust gas and the main body 10, thereby facilitating heat dissipation.

[0042] The number of the first vortex portion 23, the second vortex portion 32 and the third vortex portion 42 can be designed according to actual needs. For example, in the present embodiment, the number of the first vortex portion 23, the second vortex portion 32 and the third vortex portion 42 is greater than or equal to two, the first vortex portions 23 can be parallel to each other, the second vortex portions 32 can be parallel to each other, and the third vortex portions 42 can be parallel to each other.

[0043] In some optional embodiments, a primary heat dissipation and silencing channel 20, a secondary heat dissipation and silencing channel 30, a tertiary heat dissipation and silencing channel 40 and an intermediate channel 50 are sequentially formed in the main body 10 from the outside to the inside; the tertiary heat dissipation and silencing channel 40 is also formed with a plurality of air splitting holes 51, and the air splitting holes 51 are located between the second connecting port 31 and the first air outlet 41; the intermediate channel 50 is formed with a second air outlet, and the exhaust gas can flow out of the main body 10 from the first air outlet 41 in the tertiary heat dissipation and silencing channel 40, or can enter the intermediate channel 50 from the air splitting hole, and then flow out from the second air outlet. The air splitting hole splits the exhaust gas in the tertiary heat dissipation and silencing channel 40, so that part of the exhaust gas flows out from the second air outlet, which can reduce the air pressure of the first air outlet 41 and the air pressure of the second air outlet, thereby reducing the noise at the first air outlet 41 and the second air outlet. In some embodiments, the three-stage heat dissipation and silencing channel 40 can be arranged with multiple air splitting holes 51 in sequence along the direction from the second connecting port 31 and the first air outlet 41, so that a certain amount of exhaust gas is gradually diverted to the middle channel 50, avoiding a large amount of exhaust gas passing through the air splitting holes 51 at one time, and also helping to reduce the noise of the air splitting holes 51.

[0044] In some optional embodiments, the first-level heat dissipation and silencer channel 20 is formed with a plurality of first connecting ports 22, and the plurality of first connecting ports 22 are evenly arranged around the second-level heat dissipation and silencer channel 30, thereby facilitating the exhaust gas to flow evenly into the second-level heat dissipation and silencer channel 30, and the air pressure in the second-level heat dissipation and silencer channel 30 is more balanced; the second-level heat dissipation and silencer channel 30 is formed with a plurality of second connecting ports 31, and the plurality of second connecting ports 31 are evenly arranged around the third-level heat dissipation and silencer channel 40, thereby facilitating the exhaust gas to flow evenly into the third-level heat dissipation and silencer channel 40, and the air pressure in the third-level heat dissipation and silencer channel 40 is more balanced.

[0045] In some optional embodiments, the first communication port 22 extends along the extension direction of the primary heat dissipation and silencer channel 20, and the first communication port 22 is enlarged to reduce the air pressure of the first communication port 22, and is conducive to noise reduction at the first communication port 22. At the same time, when the first vortex portion 23 is provided, the first vortex portion 23 can guide the exhaust gas to pass through the first communication port 22 from different positions of the first communication port 22 in the extension direction of the primary heat dissipation and silencer channel 20, so that the exhaust gas passes through the first communication port 22 evenly, and avoids the air pressure on the side of the first communication port 22 close to the air inlet 21 being relatively high, which is conducive to enlarging the first communication port 22 while avoiding the exhaust gas passing only from a local position of the first communication port 22, thereby balancing the air pressure, and allowing the exhaust gas to pass through as many paths as possible, which is conducive to speed reduction.

[0046] The second connecting port 31 extends along the extension direction of the secondary heat dissipation and silencing channel 30. Similarly, the second connecting port 31 is enlarged to reduce the air pressure of the second connecting port 31 and facilitate noise reduction at the second connecting port 31. At the same time, when the second vortex portion 32 is provided, the second vortex portion 32 can guide the exhaust gas to pass through the second connecting port 31 from different positions of the second connecting port 31 in the extension direction of the secondary heat dissipation and silencing channel 30, so that the exhaust gas passes through the second connecting port 31 evenly, avoiding that the air pressure on the side of the second connecting port 31 close to the first connecting port 22 is relatively high. This is beneficial to enlarge the second connecting port 31 while avoiding that the exhaust gas only passes through a local position of the second connecting port 31, thereby balancing the air pressure and allowing the exhaust gas to pass through as many paths as possible, which is conducive to speed reduction.

[0047] In some optional embodiments, the main body 10 is provided with an air inlet passage 60 connected to the air inlet 21 and a conical diverter 11 disposed in the air inlet passage 60. The air inlet 21 is arranged around the conical diverter 11, and the conical diverter 11 gradually approaches the air inlet 21 in the air inlet direction of the air inlet passage 60. Exhaust gas generated by the piston engine enters the air inlet 21 from the air inlet passage 60, and the conical diverter 11 can guide the exhaust gas entering the air inlet passage 60 to be evenly diverted to various positions of the air inlet 21, so that the air pressure of the air inlet 21 and the first-level heat dissipation and silencer passage 20 is uniform, which is conducive to reducing the noise at the air inlet 21.

[0048] See also Figures 4 to 7The structure of the main body 10 can be designed according to actual needs. For example, in some optional embodiments, the main body 10 includes an outer closed cover 12, a primary vortex tube 13, a secondary vortex tube 14, a tertiary vortex tube 15, a conical diverter 11, a closed cover 16 and a diverter stopper 17; the outer closed cover 12, the primary vortex tube 13, the secondary vortex tube 14, and the tertiary vortex tube 15 are sequentially sleeved from the outside to the inside, the closed cover 16 is connected to the tail end of the outer closed cover 12, the tail end of the primary vortex tube 13, the tail end of the secondary vortex tube 14, and the tail end of the tertiary vortex tube 15, the primary heat dissipation and silencing channel 20 is formed between the outer closed cover 12 and the primary vortex tube 13, and the secondary heat dissipation and silencing channel 30 is formed in the primary vortex tube 13, between the secondary vortex tube 14, the conical diverter 11 and the closed cover 16, the tertiary heat dissipation and silencing channel 40 is formed between the secondary vortex tube 14, the tertiary vortex tube 15, the conical diverter 11 and the closed cover 16, the diverter stopper 17 is fixedly connected to the outer closed cover 12, the diverter stopper 17 presses the conical diverter 11 toward the head end of the secondary vortex tube 14 and the head end of the tertiary vortex tube 15, the diverter stopper 17 is formed with an air intake channel 60, at least part of the conical diverter 11 is located in the air intake channel 60, the air inlet 21 is connected to the air intake channel 60, and the air inlet 21 is arranged around the conical diverter 11, and the conical diverter 11 gradually approaches the air inlet 21 in the air intake direction of the air intake channel 60. In this embodiment, the air inlet 21 is arranged on the diverter stopper 17.

[0049] In this embodiment, the flow splitter stopper 17 is threadedly matched with the outer sealing cover 12 , and the flow splitter stopper 17 is also threadedly matched with the conical flow splitter 11 .

[0050] The first vortex portion 23 can be arranged on the outside of the first-level vortex tube 13 or on the inside of the outer sealing cover 12, the second vortex portion 32 can be arranged on the outside of the second-level vortex tube 14 or on the inside of the first-level vortex tube 13, and the third vortex portion 42 can be arranged on the outside of the third-level vortex tube 15 or on the inside of the second-level vortex tube 14. In this embodiment, the first vortex portion 23 can be arranged on the outside of the first-level vortex tube 13, the second vortex portion 32 can be arranged on the outside of the second-level vortex tube 14, and the third vortex portion 42 can be arranged on the outside of the third-level vortex tube 15.

[0051] In this embodiment, a converging air outlet 161 is disposed on the closing cover 16 , the first air outlet 41 and the second air outlet are connected at the converging air outlet 161 , and the exhaust gas is discharged to the outside of the main body 10 from the converging air outlet 161 .

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vortex type double heat dissipation silencer for a piston engine of an unmanned aerial vehicle, characterized in that: include: main body; The main body is formed with a primary heat dissipation and silencing channel, a secondary heat dissipation and silencing channel and a tertiary heat dissipation and silencing channel from the outside to the inside; The first-level heat dissipation and silencing channel is formed with an air inlet and a first communication port communicating with the second-level heat dissipation and silencing channel, and the first-level heat dissipation and silencing channel extends in a direction from the air inlet to the first communication port; The secondary heat dissipation and silencing channel is formed with a second communication port communicating with the third-level heat dissipation and silencing channel, and the secondary heat dissipation and silencing channel extends in a direction from the first communication port to the second communication port; The three-stage heat dissipation and silencing channel is formed with a first air outlet, and the three-stage heat dissipation and silencing channel extends along the direction from the second connecting port to the first air outlet.

2. The vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to claim 1, characterized in that: The first-level heat dissipation and silencing channel is arranged around the second-level heat dissipation and silencing channel, and the second-level heat dissipation and silencing channel is arranged around the third-level heat dissipation and silencing channel.

3. The vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to claim 2, characterized in that: A plurality of first vortex portions are arranged in the first-stage heat dissipation and silencing channel, and the first vortex portions extend spirally around the second-stage heat dissipation and silencing channel in the extension direction of the first-stage heat dissipation and silencing channel.

4. The vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to claim 2, characterized in that: A plurality of second vortex portions are arranged in the secondary heat dissipation and silencing channel, and the second vortex portions extend spirally around the tertiary heat dissipation and silencing channel in the extension direction of the secondary heat dissipation and silencing channel.

5. The vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to claim 2, characterized in that: A plurality of third vortex portions are arranged in the three-stage heat dissipation and silencing channel, and the third vortex portions extend spirally in the extension direction of the three-stage heat dissipation and silencing channel.

6. A vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to any one of claims 1 to 5, characterized in that: The main body is formed with the primary heat dissipation and silencing channel, the secondary heat dissipation and silencing channel, the tertiary heat dissipation and silencing channel and the middle channel in sequence from the outside to the inside; The three-stage heat dissipation and silencer channel is further formed with a plurality of air distribution holes, and the air distribution holes are located between the second communication port and the first air outlet; The middle channel is formed with a second air outlet.

7. A vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to any one of claims 1 to 5, characterized in that: The first-level heat dissipation and silencer channel is formed with a plurality of the first communication ports, and the plurality of the first communication ports are evenly arranged around the second-level heat dissipation and silencer channel; The secondary heat dissipation and silencing channel is formed with a plurality of the second communication ports, and the plurality of the second communication ports are evenly arranged around the tertiary heat dissipation and silencing channel.

8. A vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to any one of claims 1 to 5, characterized in that: The first communication port extends along the extension direction of the primary heat dissipation and silencing channel, and the second communication port extends along the extension direction of the secondary heat dissipation and silencing channel.

9. A vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to any one of claims 1 to 5, characterized in that: The main body is provided with an air intake passage connected to the air intake port and a conical flow divider arranged in the air intake passage. The air intake port is arranged around the conical flow divider. The conical flow divider gradually approaches the air intake port in the air intake direction of the air intake passage.

10. A vortex type double heat dissipation silencer for a piston engine for an unmanned aerial vehicle according to any one of claims 1 to 5, characterized in that: The main body comprises an outer sealing cover, a primary vortex tube, a secondary vortex tube, a tertiary vortex tube, a conical flow splitter, a sealing cover and a flow splitter stopper; The outer closed cover, the first-stage vortex tube, the second-stage vortex tube, and the third-stage vortex tube are sequentially sleeved from the outside to the inside, the outer closed cover is formed with an air inlet channel, the closed cover is connected to the tail end of the outer closed cover, the tail end of the first-stage vortex tube, the tail end of the second-stage vortex tube, and the tail end of the third-stage vortex tube, the first-stage heat dissipation and silencer channel is formed between the outer closed cover and the first-stage vortex tube, the second-stage heat dissipation and silencer channel is formed between the first-stage vortex tube, the second-stage vortex tube, the conical splitter and the closed cover, and the third-stage heat dissipation and silencer channel is formed between the outer closed cover and ... The diverter limiter is formed between the secondary vortex tube, the tertiary vortex tube, the conical diverter and the closing cover, the diverter limiter is fixedly connected to the outer closing cover, the diverter limiter presses the conical diverter toward the head end of the secondary vortex tube and the head end of the tertiary vortex tube, the diverter limiter forms the air inlet channel, at least part of the conical diverter is located in the air inlet channel, the air inlet is connected to the air inlet channel and is arranged around the conical diverter, and the conical diverter gradually approaches the air inlet in the air inlet direction of the air inlet channel.

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