CN212473927U

CN212473927U - Silencing device for unmanned aerial vehicle engine

Info

Publication number: CN212473927U
Application number: CN202021332036.7U
Authority: CN
Inventors: 何杰; 贺飞; 王浩; 杨颖�; 王鑫
Original assignee: Chinese Peoples Armed Police Force Academy
Current assignee: Chinese Peoples Armed Police Force Academy
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-02-05
Anticipated expiration: 2030-07-09

Abstract

The utility model discloses an silencing device for unmanned aerial vehicle engine, including box and engine, inside the engine was located the box, through inside heat abstractor, damping device, fastener and the chamber of eliminating the noise of setting up of box, it is not good to solve the engine heat dissipation well, and vibrations sound is big, the big technical problem of noise.

Description

Silencing device for unmanned aerial vehicle engine

Technical Field

The utility model relates to an unmanned air vehicle technique field especially relates to an silencing device for unmanned aerial vehicle engine.

Background

The unmanned aerial vehicle has the value of forming an aerial platform, is combined with other parts for expanding application, and replaces human beings to finish aerial operation. Along with the gradual maturity of unmanned aerial vehicle research and development technique, manufacturing cost reduces by a wide margin, and unmanned aerial vehicle has obtained wide application in each field, and except military use, still include civilian fields such as agricultural plant protection, electric power patrol inspection, police law enforcement, geological exploration, environmental monitoring, forest fire prevention and movie & TV aerial photograph, and its application field still expands rapidly. The agricultural plant protection unmanned aerial vehicle industry is thriving, and the agricultural plant protection unmanned aerial vehicle can not bypass the three problems of safety, privacy and endurance all the time in the development process.

Divide according to unmanned aerial vehicle driving system source, mainly divide into two kinds at present electronic agricultural plant protection unmanned aerial vehicle and oily agricultural plant protection unmanned aerial vehicle, electronic agricultural plant protection unmanned aerial vehicle provides power with the lithium cell, and the shortcoming is: anti-wind-force is weak (can resist 5 grades of wind at most), duration is weak (based on the energy density of current battery, electric unmanned aerial vehicle's duration is relatively weak), load and duration are less, go out to fly and need carry a large amount of batteries even generator, when agricultural plant protection unmanned aerial vehicle carried the thing, because of the weight of its self in addition the weight of pesticide, chemical fertilizer etc. rely on the motor to drive hardly to realize, oil moved agricultural plant protection unmanned aerial vehicle has just appeared based on above-mentioned problem, its advantage: oil moves unmanned aerial vehicle and has better anti-wind ability, and oil moves unmanned aerial vehicle duration long, and duration is strong, and its shortcoming is: 1. the heat dissipation is not good; 2. the engine has larger vibration and brings larger noise. Therefore, a noise reduction device with good heat dissipation performance and capable of reducing vibration and noise pollution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the silencing device for the unmanned aerial vehicle engine that proposes, the problem that can effectual solution background art propose.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a silencing device for an unmanned aerial vehicle engine comprises a box body and an engine, wherein the engine is positioned in the box body, the bottom of the box body is fixedly connected with a damping device, the upper end face of the damping device is fixedly connected with a radiator, one side of the radiator is provided with an exhaust fan and is in contact connection with the exhaust fan, the two sides of the box body are respectively provided with an air inlet and an air outlet, the air inlet corresponds to one side of the radiator, the air outlet corresponds to the exhaust fan on one side of the radiator, the top of the box body is in threaded connection with a fastening device, the engine is arranged above the radiator and is fixedly connected, one side of the engine is connected with a silencing cavity, the silencing cavity comprises an air inlet pipe, a cylindrical barrel, a through hole and an exhaust pipe, one end of the air inlet pipe is detachably connected with an exhaust port of, the air inlet pipe is arranged in the air outlet of the air conditioner, the air outlet pipe is arranged in the air inlet pipe, and the air outlet pipe is connected with the air outlet pipe.

Preferably, damping device includes cushion socket, first spring and bottom plate, cushion socket and box inner wall fixed connection, the one side fixed connection of box is kept away from to first spring one end and cushion socket, the other end and bottom plate fixed connection, cushion socket and first spring are one at least, and the cushion socket cooperatees with first spring and uses.

Preferably, the bottom of the bottom plate is fixedly connected with a first spring, two sides of the bottom plate are respectively fixedly connected with the first spring, and the shock absorbing seats on two sides of the bottom plate are fixedly connected with two side walls of the box body and symmetrically arranged at the same horizontal position with the bottom plate.

Preferably, the fastening device sequentially comprises a fastening piece, a screw rod, a strip-shaped block, a connecting piece, a second spring and a pressing plate from top to bottom, the fastening piece is welded at the top of the screw rod, the bottom of the screw rod is fixedly connected with the strip-shaped block, the strip-shaped block is located inside the connecting piece and is in sliding connection with the connecting piece, the bottom of the connecting piece is fixedly connected with the pressing plate, the second spring is further arranged inside the connecting piece, one end of the second spring is fixedly connected with the middle position of the bottom of the strip-shaped block, and the other end of the second spring is.

Preferably, the outer side of the lower end of the screw is a smooth surface, the length of the smooth surface is slightly larger than the height of the connecting piece, external threads are arranged on the outer side of the rest part of the screw, a round hole is formed in the top of the box body, and internal threads matched with the external threads are arranged on the inner side of the round hole.

Preferably, a damping ring is sleeved on the outer side of the part, connected with the exhaust port of the engine, of the air inlet pipe.

Preferably, the air inlet is provided with a filter screen matched with the air inlet.

Preferably, the box includes shell and sound absorbing layer, the sound absorbing layer sets up the inboard at the shell, the sound absorbing layer is the sound absorption cotton.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through setting up air intake, filter screen, radiator, air exhauster and air outlet, can realize that the heat that produces in the engine work discharges rapidly, prevents that the engine from overheated to reduce its power, secondly sets up at the air intake and does benefit to in the air with its assorted filter screen and block in the external world tiny particles such as levitate insect, dust thing, prevents to get into the box and adheres to the result of use that influences the device on the internal arrangement.

2. The damping device arranged at the bottom of the box body and the fastening device arranged at the top of the box body can realize the damping function of the engine, the engine can generate vibration in the rotating process, a large amount of noise is generated due to the vibration, the vibration is reduced, the noise is reduced, the first spring and the damping seat are fixedly connected to the two sides and the bottom of the bottom plate, and the balance of the bottom plate can be controlled while the vibration is damped; on the other hand, the structural arrangement of the fastening device can fix the engine and assist in damping.

3. The silencing cavity is detachably connected with the exhaust port of the engine, so that later-period timed cleaning is facilitated, impurities mixed in tail gas discharged by the engine can be attached to the inner wall of the silencing cavity after the engine is used for a period of time, the cleaning in a detachable connection mode is convenient, and the installation is simple; high-frequency air current passes through the noise elimination chamber amortization back and directly reaches the air outlet through the blast pipe intercommunication and discharges, and the air current of well low frequency passes in the through-hole entering box on the noise elimination chamber, inhales the sound through the cotton of inhaling on the box inside wall, and the air current is discharged from the air outlet under the effect of air exhauster. The device has the advantages of simple structure and powerful functions, and can dissipate heat, absorb shock and realize multiple silencing.

Drawings

Fig. 1 is a schematic view of an overall structure of a silencer for an unmanned aerial vehicle engine according to the present invention;

fig. 2 is the utility model provides a box structure schematic diagram of silencing device for unmanned aerial vehicle engine.

In the figure: the vibration damping device comprises a box body 1, an engine 2, a radiator 3, an exhaust fan 4, an air inlet 5, an air outlet 6, an air inlet pipe 7, a cylindrical barrel 8, a through hole 9, an exhaust pipe 10, a damping seat 11, a first spring 12, a base plate 13, a fastening piece 14, a screw rod 15, a bar block 16, a connecting piece 17, a second spring 18, a pressing plate 19, a damping ring 20, a filter screen 21, a shell 22 and a sound absorbing layer 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and in the present invention, unless explicitly specified or limited otherwise, the terms "mounting", "setting", "connecting", "fixing", "screwing", and the like are to be understood in a broad sense, for example, they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Referring to fig. 1-2, a silencing device for an unmanned aerial vehicle engine comprises a box body 1 and an engine 2, wherein the engine 2 is located inside the box body 1, the box body 1 comprises a shell 22 and a sound absorption layer 23, the sound absorption layer 23 is arranged on the inner side of the shell 22, and the sound absorption layer 23 is made of sound absorption cotton; the bottom of the box body 1 is fixedly connected with a damping device, the damping device comprises a damping seat 11, a first spring 12 and a bottom plate 13, the damping seat 11 is fixedly connected with the inner wall of the box body 1, one end of the first spring 12 is fixedly connected with one side of the damping seat 11 far away from the box body 1, the other end of the first spring is fixedly connected with the bottom plate 13, at least one damping seat 11 and at least one first spring 12 are arranged, the damping seat 11 is matched with the first spring 12 for use, preferably, the bottom of the bottom plate 13 is fixedly connected with the first spring 12, the number of the first springs 12 at the bottom of the bottom plate 13 is four, the damping seats 11 at the two sides of the bottom plate 13 are symmetrically arranged below the bottom plate 13, the two sides of the bottom plate 13 are respectively fixedly connected with the first springs 12, the number of the first springs 12 at the two sides of the bottom plate 13 is at least one, the damping seats 11 at the two sides of the, the damping device arranged at the bottom of the box body 1 can realize the damping function of the engine 2, the engine 2 can generate vibration in the rotating process, a large amount of noise is generated due to the vibration, the vibration is reduced, the noise is reduced, the first spring 12 and the damping seat 11 are fixedly connected to the two sides and the bottom of the bottom plate 13, and the balance of the bottom plate can be controlled while damping; the upper end face of the damping device is fixedly connected with a radiator 3, an exhaust fan 4 is arranged on one side of the radiator 3 and is in contact connection with the exhaust fan 4, an air inlet 5 and an air outlet 6 are respectively arranged on two sides of the box body 1, the air inlet 5 is provided with a filter screen 21 matched with the air inlet 5, so that fine particles such as insects, dust and the like floating in the air can be blocked outside, the fine particles are prevented from entering the box body 1 and attaching to an internal device to influence the use effect of the device, the air inlet 5 corresponds to one side of the radiator 3, the air outlet 6 corresponds to the exhaust fan 4 on one side of the radiator 3, the heat generated in the work of the engine 2 can be rapidly discharged, and the engine 2; the top of the box body 1 is in threaded connection with a fastening device, the fastening device sequentially comprises a fastening piece 14, a screw 15, a strip-shaped block 16, a connecting piece 17, a second spring 18 and a pressing plate 19 from top to bottom, the fastening piece 14 is welded at the top of the screw 15, the bottom of the screw 15 is fixedly connected with the strip-shaped block 16, the strip-shaped block 16 is positioned inside the connecting piece 17 and is in sliding connection with the connecting piece 17, the bottom of the connecting piece 17 is fixedly connected with the pressing plate 19, the second spring 18 is further arranged inside the connecting piece 17, one end of the second spring 18 is fixedly connected with the middle position of the bottom of the strip-shaped block 16, the other end of the second spring is fixedly connected with the bottom of the connecting piece 17, preferably, the outer side of the lower end of the screw 15 is a smooth surface, the length of the smooth surface is slightly larger, the inner side of the round hole is provided with an internal thread matched with the external thread, the fastener 14 is rotated clockwise, the external thread on the screw rod 15 is matched with the internal thread on the inner side of the round hole at the top of the box body 1 to move downwards, the bar-shaped block 16 in the connecting piece 17 presses the second spring 18 downwards to form an extrusion force to act on the pressing plate 19, the engine 2 is fixed, meanwhile, the shock absorption can be assisted, and the shock generated by the engine 2 is gradually weakened through the action of the second spring 18; the engine 2 is arranged above the radiator 3 and is fixedly connected with the radiator, one side of the engine 2 is connected with the silencing cavity, the silencing cavity comprises an air inlet pipe 7, a cylindrical barrel 8, a through hole 9 and an exhaust pipe 10, one end of the air inlet pipe 7 is detachably connected with an exhaust port of the engine 2, the detachable connection mode is convenient to clean and simple to install, the outer side of the part of the air inlet pipe 7 connected with the exhaust port of the engine 2 is sleeved with a damping ring 20, the multi-stage damping device can realize the damping function of the engine 2 to the maximum extent, thereby reducing the noise, the other end of the air inlet pipe 7 extends into the cylindrical barrel 8 and is connected with the cylindrical barrel 8 in a sealing way, the cylindrical barrel 8 is provided with a plurality of through holes 9, one end of the exhaust pipe 10 is connected with one end of the cylindrical barrel 8, far away from the air inlet pipe 7, in a sealing manner, and the other end of the exhaust pipe extends to the air outlet 6.

The working principle is as follows: the engine 2 rotates, the generated heat is radiated through the radiator 3, the heat is conveyed to the air outlet 6 through the exhaust fan 4 to be discharged, and clean air enters the box body 1 through the air inlet 5 to assist in cooling; the strong vibrations that produce in the 2 course of the work of engine pass through damping device and fastener and also damping ring 20 weaken the intensity of vibrations, the noise reduction, simultaneously the exhaust waste gas of gas vent through engine 2 carries out the amortization through the chamber of eliminating the noise, finally carry air outlet 6 by blast pipe 10 and discharge, the noise of low-speed air current in the supplementary absorption of box 1 inboard inhale the sound cotton, through setting up heat abstractor, damping device, fastener and the chamber of eliminating the noise, it is not good to solve engine heat dissipation well, vibrations sound is big, the technical problem that the noise is big.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an silencing device for unmanned aerial vehicle engine, includes box and engine, the engine is located inside the box, its characterized in that: the box body is characterized in that the bottom of the box body is fixedly connected with a damping device, the upper end face of the damping device is fixedly connected with a radiator, one side of the radiator is provided with an exhaust fan and is in contact connection with the exhaust fan, the two sides of the box body are respectively provided with an air inlet and an air outlet, the air inlet corresponds to one side of the radiator, the air outlet corresponds to the exhaust fan at one side of the radiator, the top of the box body is in threaded connection with a fastening device, the engine is arranged above the radiator and is fixedly connected with the radiator, one side of the engine is connected with a silencing cavity, the silencing cavity comprises an air inlet pipe, a cylindrical barrel body, a through hole and an exhaust pipe, one end of the air inlet pipe is detachably connected with the exhaust port of the engine, the other end of the air inlet pipe extends into the cylindrical barrel body and, the other end extends to the air outlet.

2. The silencing device for the unmanned aerial vehicle engine as defined in claim 1, wherein: damping device includes cushion socket, first spring and bottom plate, cushion socket and box inner wall fixed connection, the one side fixed connection of box is kept away from to first spring one end and cushion socket, the other end and bottom plate fixed connection, cushion socket and first spring are one at least, and the cushion socket uses with first spring cooperatees.

3. The silencing device for the unmanned aerial vehicle engine as defined in claim 2, wherein: the bottom of the bottom plate is fixedly connected with a first spring, two sides of the bottom plate are respectively fixedly connected with the first spring, and the shock absorbing seats on two sides of the bottom plate are fixedly connected with two side walls of the box body and symmetrically arranged at the same horizontal position with the bottom plate.

4. The silencing device for the unmanned aerial vehicle engine as defined in claim 1, wherein: the fastening device sequentially comprises a fastening piece, a screw rod, a strip-shaped block, a connecting piece, a second spring and a pressing plate from top to bottom, the fastening piece is welded at the top of the screw rod, the bottom of the screw rod is fixedly connected with the strip-shaped block, the strip-shaped block is located inside the connecting piece and is in sliding connection with the connecting piece, the bottom of the connecting piece is fixedly connected with the pressing plate, the second spring is further arranged inside the connecting piece, one end of the second spring is fixedly connected with the middle position of the bottom of the strip-shaped block, and the other end of the second spring.

5. The silencing device for the unmanned aerial vehicle engine as defined in claim 4, wherein: the outer side of the lower end of the screw is a smooth surface, the length of the smooth surface is slightly larger than the height of the connecting piece, external threads are arranged on the outer side of the rest part of the screw, a round hole is formed in the top of the box body, and internal threads matched with the external threads are arranged on the inner side of the round hole.

6. The silencing device for the unmanned aerial vehicle engine as defined in claim 1, wherein: and a damping ring is sleeved on the outer side of the part, connected with the exhaust port of the engine, of the air inlet pipe.

7. The silencing device for the unmanned aerial vehicle engine as defined in claim 1, wherein: the air inlet is provided with a filter screen matched with the air inlet.

8. The silencing device for the unmanned aerial vehicle engine as defined in claim 3, wherein: the box includes shell and sound absorbing layer, the sound absorbing layer sets up the inboard at the shell, the sound absorbing layer is for inhaling the sound cotton.