Air inlet silencing device for eliminating low-frequency resonance airflow

Abstract

The invention discloses an air inlet noise elimination device for eliminating low-frequency resonance airflow, and particularly relates to the technical field of air inlet noise elimination. The air inlet noise elimination device comprises an air inlet pipe, a rotating shaft, a partition pipe and a multi-point adjustment noise elimination mechanism; wherein the multi-point adjustment noise elimination mechanism comprises two sound absorption hoppers, a linkage ring, a rotating ring, a plurality of sound absorption blocks, a round hole, a connecting block, a linkage shaft, a sound absorption baffle, an arc-shaped hole and an initial separation sensor, and a space adjustment noise elimination mechanism is installed on one side of the inner wall of the partition pipe. And an interval adjusting and silencing assembly is mounted at one end part of the blocking pipe. The multi-point adjustment silencing mechanism has the advantages that multi-stage thorough silencing can be automatically carried out according to the actual noise magnitude, air inlet silencing is more thorough, and the air inlet silencing effect is greatly improved, so that the problems that multi-stage thorough silencing is difficult to automatically carry out according to the actual noise magnitude, silencing is not thorough enough, and the silencing effect is poor are solved. And the air inlet silencing effect is poor.

Description

Technical Field

[0001] The present invention relates to the technical field of air intake silencer, and more specifically, to an air intake silencer device for eliminating low-frequency resonant airflow. Background Art

[0002] Resonance type intake silencer is mainly used to eliminate low-frequency noise during intake. In the case of intake system, low-frequency noise is often difficult to be effectively eliminated by traditional silencing methods. Resonance type silencer uses the resonance principle and connects the resonant cavity through the opening of the pipe to form an elastic resonance system. When the external noise frequency contacts the sound-absorbing material inside the intake silencer, the sound energy is consumed, thereby achieving the purpose of intake silencing.

[0003] In the existing public documents, the patent with patent announcement number CN109488495A discloses a muffler and a vehicle. The technology uses a resonance tube and a first partition plate and a second partition plate arranged on the resonance tube. The first partition plate and the second partition plate divide the outer shell into a first expansion chamber, a resonance chamber, and a second expansion chamber. The resonance chamber is located between the first partition plate and the second partition plate. The first expansion chamber and the second expansion chamber are located on the other side of the first partition plate and the second partition plate respectively. The first expansion chamber is connected to the inlet and the second expansion chamber is connected to the outlet, wherein the axial relative position of the first partition plate and the second partition plate is adjustable, thereby changing the volume of at least one of the resonance chamber, the first expansion chamber, and the second expansion chamber. The muffler itself can be adjusted to adapt to different muffler frequencies of different vehicles to improve the muffler effect; however, the patent technology still has the following problems.

[0004] The intake airflow will generate a high pressure explosion pressure during the low-frequency resonance process. Although a silencer can be used to contact the low-frequency resonant airflow to achieve sound absorption and silence, the airflow noise varies. For the large sudden intake noise airflow, the sound-absorbing guide opening space is a fixed space, which causes the noise to flow quickly from a large space and the intake noise is large. This makes it difficult to automatically perform multi-level thorough silencer according to the actual noise level, making the intake silencer not thorough enough and resulting in poor intake silencer effect. For this reason, an intake silencer device that can eliminate the low-frequency resonant airflow is needed. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: an intake silencer device for eliminating low-frequency resonant airflow, comprising an intake pipe, a rotating shaft is installed inside the intake pipe, a baffle pipe is fixedly connected to the outer wall of the intake pipe, and a multi-point adjustable silencer mechanism is provided on the outer wall of the rotating shaft; the multi-point adjustable silencer mechanism comprises two sound-absorbing buckets rotatably arranged on the outer wall of the rotating shaft, both of the sound-absorbing buckets are fixedly connected to the intake pipe, a rotatably connected linkage ring is provided on one side of the sound-absorbing bucket, and a swivel is fixedly connected to the inner wall of the linkage ring, and the swivel is fixedly connected to the rotating shaft, and the swivel is rotatably connected to the sound-absorbing bucket.

[0006] A plurality of sound-absorbing blocks are fixedly connected to the outer wall of the linkage ring, a circular hole is provided on one side of each of the sound-absorbing blocks, a connecting block is fixedly connected to the outer wall of the sound-absorbing block, a linkage shaft is fixedly connected to one side of the connecting block, a sound-absorbing baffle is fixedly connected to one end of the linkage shaft, an arc-shaped hole is provided on one side of each of the sound-absorbing baffles, and a plurality of the sound-absorbing baffles are slidably connected to the sound-absorbing bucket; an initial partial-belt sensor fixedly connected to the air intake pipe is provided on one side of the sound-absorbing bucket, a space-adjusting silencer mechanism is installed on one side of the inner wall of the baffle tube; and an interval-adjusting silencer assembly is installed on one end of the baffle tube.

[0007] Preferably, the sound absorbing block and the connecting block are both rotatably connected to the sound absorbing bucket, the vertical cross-sectional area of ​​the sound absorbing block is larger than the vertical cross-sectional area of ​​the circular hole, one end of the rotating shaft is fixedly connected to an angle sensor, and one end of the angle sensor is fixedly installed with a rotating motor; A bracket is fixedly connected to one side of the outer wall of the angle sensor, and the bracket and the rotating motor are fixedly connected to the baffle tube. A controller is provided on one side of the intake pipe, and the controller is fixedly connected to the baffle tube.

[0008] When this technology is in use, when the detected noise decibel value is greater than the noise decibel value set by the controller, the output end of the rotating motor drives the sensing shaft of the angle sensor, the rotating shaft rotates clockwise inside the two sound-absorbing buckets, the rotating ring drives the linkage ring to rotate clockwise, the sound-absorbing block can block the circular hole, the sound-absorbing block can contact and buffer the noise airflow to absorb sound, and multiple sound-absorbing blocks contact the noise airflow to achieve sound absorption. The connecting block drives the linkage shaft to rotate clockwise, and the sound-absorbing baffle can block the arc hole position, so that the air intake area of ​​the noise airflow entering the multiple arc holes becomes smaller.

[0009] Preferably, the space adjustment and muffler mechanism comprises an electric cylinder fixedly mounted on one side of the inner wall of the baffle tube; a push block is fixedly connected to the output end of the electric cylinder, and a groove ring is fixedly connected to one end of the push block, a plurality of connecting shafts are fixedly connected to the inner wall of the groove ring, and a sleeve rod is rotatably connected to the outer wall of each connecting shaft; The inner wall of the sleeve rod is rotatably connected with an articulated shaft at a position away from the connecting shaft, and a linkage plate is fixedly connected to one end of the articulated shaft, and a sleeve block is fixedly connected to one end of the linkage plate, and a slide frame is slidably connected to the outer wall of the sleeve block, and multiple slide frames are fixedly connected to the partition tube; a guide column is slidably connected to the inner wall of the sleeve block, and the guide column and the slide frame are fixedly connected, a push shaft is fixedly installed on one side of the sleeve block, and an arc-shaped sound-absorbing panel is fixedly connected to one end of the push shaft, a polyester fiber sound-absorbing panel is fixedly connected to one side of the arc-shaped sound-absorbing panel, and multiple buffer guide plates are fixedly connected to the inner wall of the polyester fiber sound-absorbing panel, and multiple connecting shafts are arranged in a circular ring with equal distances, and the cross-sectional shapes of the connecting shaft and the articulated shaft are both circular, the arc-shaped sound-absorbing panel is slidably connected to the slide frame, and the inner wall of the arc-shaped sound-absorbing panel and the outer wall of the slide frame are both smooth surfaces.

[0010] When this technology is in use, the electric cylinder pushes the push block to move right, the groove ring makes multiple connecting shafts move right synchronously, the other end position of the sleeve rod can drive the hinged shaft to approach the center point of the air intake pipe, the linkage plate makes the sleeve block approach the center point of the air intake pipe, and the sleeve block approaches the center point of the air intake pipe along the outer wall of the guide column, so that multiple arc-shaped sound-absorbing panels can approach the center point of the air intake pipe synchronously, and the arc-shaped sound-absorbing panels can drive the polyester fiber sound-absorbing panels to approach the center point of the air intake pipe. The space where the noise airflow flows between the multiple arc-shaped sound-absorbing panels is reduced, and at the same time, after the noise airflow contacts multiple buffer guides and the arc-shaped sound-absorbing panels, multi-layer sound absorption and buffering are achieved.

[0011] Preferably, the interval adjustment silencer assembly comprises a diffuser fixedly mounted at one end of the baffle tube; a connecting hole is provided inside the baffle tube and close to the diffuser tube, one end of the connecting hole is fixedly connected to a butt tube, and a middle decibel sensor is fixedly connected to the inner wall of the butt tube; a guide groove ring is fixedly connected to one side of the inner wall of the diffuser tube, and one end of the diffuser tube is fixedly connected to an intake guide tube, and a terminal decibel sensor is fixedly connected to one side of the inner wall of the intake guide tube; The outer wall of the guide groove ring is fixedly connected to a support frame, and the support frame is rotatably connected to a linkage screw inside, the bottom end of the inner wall of the support frame is fixedly connected to a reduction motor, and the reduction motor is used to drive the linkage screw to rotate, and the outer wall of the linkage screw is threadedly connected to two threaded sleeves; one side of each threaded sleeve is fixedly connected to a linkage bar, and one side of the linkage bar is fixedly connected to two sound-absorbing clamping plates, the sound-absorbing clamping plates are slidably connected to the guide groove ring, the output end of the reduction motor is fixedly connected to the bottom end of the linkage screw, and the two threaded sleeves are slidably connected to the support frame, the two threads on the outer wall of the linkage screw are opposite and symmetrically arranged, and the vertical cross-section of the threaded sleeve is L-shaped.

[0012] When this technology is in use, the noise airflow that has been silenced twice enters the connecting hole along the docking tube and enters the inside of the guide groove ring through the diffuser. The reduction motor drives the linkage screw to rotate, and the linkage screw drives the two threaded sleeves to approach each other under the action of the thread transmission force. The linkage strip drives the two sound-absorbing splints to move up, and the two sound-absorbing splints move up along the inner wall of the guide groove ring. At the same time, another linkage strip moves down, and another linkage strip drives the other two sound-absorbing splints to move down. Multiple sound-absorbing splints can absorb and block the noise airflow. After the third noise reduction and silence, the noise airflow enters the intake guide pipe along the guide groove ring, and the decibel value sensing is realized by the final decibel sensor inside the intake guide pipe. The decibel value sensed by the final decibel sensor is lower than the decibel value set by the controller, and the intake silencer effect is better.

[0013] Technical effects and advantages of the present invention: 1. The present invention adopts a multi-point adjustment silencer mechanism. When the detected noise decibel value is greater than the noise decibel value set by the controller, the output end of the rotating motor drives the sensing shaft of the angle sensor, and the rotating shaft rotates clockwise inside the two sound-absorbing buckets. The sound-absorbing block can block the circular hole, and the air intake area of ​​the noise airflow entering the circular hole becomes smaller. The sound-absorbing block can contact and buffer the noise airflow to absorb sound. The sound-absorbing baffle can block the arc hole position, and the air intake area of ​​the noise airflow entering multiple arc holes becomes smaller, reducing the flow rate of the noise airflow and increasing the sound absorption contact area. It can automatically perform multi-level thorough silencing according to the actual noise size, making the intake silencing more thorough and greatly improving the intake silencing effect.

[0014] 2. The present invention adopts a silencer mechanism that is adjusted by space, so that the electric cylinder pushes the push block to move right, the groove ring enables multiple connecting shafts to move right synchronously, the other end position of the sleeve rod can drive the hinged shaft to approach the center point of the air intake pipe, the linkage plate enables the sleeve block to approach the center point of the air intake pipe, and the multiple arc-shaped sound-absorbing panels can approach the center point of the air intake pipe synchronously. The noise airflow between the multiple arc-shaped sound-absorbing panels has a reduced intake space, and the noise airflow contacts multiple buffer guide plates and the arc-shaped sound-absorbing panels to achieve multi-layer sound absorption and buffering. The noise airflow is silenced again, and can automatically perform multi-level thorough silencing according to the actual noise size, so that the intake silencing is more thorough.

[0015] 3. The present invention adjusts the silencer assembly at intervals. When the noise detected by the decibel sensor still exceeds the decibel value set by the controller, the controller continues to start the reduction motor, which drives the linkage screw to rotate. The linkage screw drives the two threaded sleeves to approach each other under the action of the thread transmission force. The two threaded sleeves respectively drive the two linkage strips to approach each other. The two sound-absorbing splints move upward along the inner wall of the guide groove ring, which can reduce the internal air intake area of ​​the guide groove ring. At the same time, multiple sound-absorbing splints can absorb and block the noise airflow. The noise airflow can be completely silenced to the specified decibel value, and the noise reduction adjustment process is thoroughly performed. The noise airflow can completely eliminate low-frequency resonance, and the air intake silencer effect is better.

[0016] According to the mutual influence of the above multiple effects, when the detected noise decibel value is greater than the noise decibel value set by the controller, the sound-absorbing block can block the circular hole, and the sound-absorbing baffle can block the arc-shaped hole position, and then the noise airflow between the multiple arc-shaped sound-absorbing panels, the air intake space flowing is reduced, and the noise airflow contacts multiple buffer guides and arc-shaped sound-absorbing panels to achieve multi-layer sound absorption and buffering. Finally, multiple sound-absorbing splints can absorb and block the noise airflow until the noise airflow can be completely silenced to the specified decibel value. In summary, it can automatically perform multi-level complete silencing according to the actual intake noise size, making the intake silencing more thorough, and the noise airflow can completely eliminate low-frequency resonance, greatly improving the intake silencing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the air intake silencer device for eliminating low-frequency resonant airflow of the present invention.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the air intake silencer device for eliminating low-frequency resonant airflow of the present invention.

[0019] Figure 3 It is a schematic diagram of the partial structure of the cross section of the connection between the sound absorbing bucket and the air intake pipe of the present invention.

[0020] Figure 4 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0021] Figure 5 It is a schematic diagram of the partial structure of the cross section of the connection between the baffle tube and the rotating motor of the present invention.

[0022] Figure 6 It is a schematic diagram of the vertical cross-section structure of the air intake silencer device for eliminating low-frequency resonant airflow of the present invention.

[0023] Figure 7 It is a schematic diagram of the partial structure of the connection between the baffle tube and the electric cylinder of the present invention.

[0024] Figure 8 It is a schematic diagram of the partial structure of the connection between the sliding frame and the guide column of the present invention from a front view.

[0025] Fig. 9 It is a schematic diagram of the local structure of the vertical section of the connection between the guide groove ring and the support frame of the present invention.

[0026] Fig.10 It is a schematic diagram of the local structure of the vertical section of the connection between the threaded sleeve block and the linkage bar of the present invention.

[0027] The accompanying drawings are marked as follows: 1, air intake pipe; 2, rotating shaft; 3, sound absorbing bucket; 4, linkage ring; 5, rotating ring; 6, sound absorbing block; 7, round hole; 8, connecting block; 9, linkage shaft; 10, sound absorbing baffle; 11, arc hole; 12, initial partial bass sensor; 13, baffle tube; 14, angle sensor; 15, rotating motor; 16, bracket; 17, controller; 18, electric cylinder; 19, push block; 20, groove ring; 21, connecting shaft; 22, sleeve rod; 23, articulated shaft; 24, Linkage plate; 25, sleeve block; 26, slide frame; 27, guide column; 28, push shaft; 29, arc sound-absorbing board; 30, polyester fiber sound-absorbing board; 31, buffer guide plate; 32, diffuser; 33, connecting hole; 34, butt pipe; 35, middle partial bezel sensor; 36, guide groove ring; 37, intake guide pipe; 38, final partial bezel sensor; 39, support frame; 40, linkage screw; 41, reduction motor; 42, threaded sleeve block; 43, linkage strip; 44, sound-absorbing splint. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] As attached Figure 1-10 An intake silencer for eliminating low-frequency resonant airflow is shown. The intake silencer for eliminating low-frequency resonant airflow is provided with a multi-point adjustable silencer mechanism, a space-adjustable silencer mechanism, and an interval-adjustable silencer component. The settings of each mechanism and component can automatically perform multi-level thorough silencer according to the actual noise level, making the intake silencer more thorough. The noise airflow can completely eliminate low-frequency resonance and greatly improve the intake silencer effect. The specific structural settings of each mechanism and component are as follows.

[0030] In this embodiment, as shown in the attached Figure 1-4As shown, the outer wall of the rotating shaft 2 is provided with a multi-point adjustable silencer mechanism; the multi-point adjustable silencer mechanism includes two sound-absorbing buckets 3 rotatably arranged on the outer wall of the rotating shaft 2, the two sound-absorbing buckets 3 are fixedly connected to the air intake pipe 1, one side of the sound-absorbing bucket 3 is provided with a rotatably connected linkage ring 4, and the inner wall of the linkage ring 4 is fixedly connected with a swivel 5, and the swivel 5 is fixedly connected to the rotating shaft 2, and the swivel 5 is rotatably connected to the sound-absorbing bucket 3. The outer wall of the linkage ring 4 is fixedly connected with a plurality of sound-absorbing blocks 6, a circular hole 7 is provided on one side of each sound-absorbing block 6, a connecting block 8 is fixedly connected with the outer wall of the sound-absorbing block 6, a linkage shaft 9 is fixedly connected to one side of the connecting block 8, a sound-absorbing baffle 10 is fixedly connected to one end of the linkage shaft 9, an arc hole 11 is provided on one side of each sound-absorbing baffle 10, and the plurality of sound-absorbing baffles 10 are slidably connected to the sound-absorbing bucket 3; an initial partial-belt sensor 12 fixedly connected to the air intake pipe 1 is provided on one side of the sound-absorbing bucket 3, a space-adjusting silencer mechanism is installed on one side of the inner wall of the baffle tube 13; and an interval-adjusting silencer assembly is installed at one end of the baffle tube 13.

[0031] In this embodiment, as shown in the attached Figure 1-5 As shown, an angle sensor 14 is fixedly connected to one end of the rotating shaft 2, and a rotating motor 15 is fixedly installed on one end of the angle sensor 14; a bracket 16 is fixedly connected to one side of the outer wall of the angle sensor 14, and the bracket 16 and the rotating motor 15 are both fixedly connected to the baffle tube 13, so that the controller 17 can start the rotating motor 15, and the bracket 16 stably supports the angle sensor 14, and the output end of the rotating motor 15 drives the sensing shaft part of the angle sensor 14, and the angle sensor 14 causes the rotating shaft 2 to rotate clockwise, thereby realizing the driving operation of the rotating shaft 2.

[0032] A controller 17 is provided on one side of the air intake pipe 1, and the controller 17 is fixedly connected to the baffle pipe 13, so that when the detected noise decibel value is greater than the noise decibel value set by the controller 17, the rotating motor 15 is started by the controller 17 to realize the starting operation of the rotating motor 15.

[0033] In this embodiment, as shown in the attached Figure 6-8 As shown, the space adjustment silencer mechanism includes an electric cylinder 18 fixedly mounted on one side of the inner wall of the baffle tube 13; a push block 19 is fixedly connected to the output end of the electric cylinder 18, and a groove ring 20 is fixedly connected to one end of the push block 19, and a plurality of connecting shafts 21 are fixedly connected to the inner wall of the groove ring 20, and a sleeve rod 22 is rotatably connected to the outer wall of each connecting shaft 21.

[0034] The inner wall of the sleeve rod 22 is rotatably connected to a hinge shaft 23 at a position away from the connecting shaft 21, a linkage plate 24 is fixedly connected to one end of the hinge shaft 23, a sleeve block 25 is fixedly connected to one end of the linkage plate 24, a slide frame 26 is slidably connected to the outer wall of the sleeve block 25, and multiple slide frames 26 are fixedly connected to the baffle tube 13; a guide column 27 is slidably connected to the inner wall of the sleeve block 25, and the guide column 27 is fixedly connected to the slide frame 26, a push shaft 28 is fixedly installed on one side of the sleeve block 25, an arc-shaped sound-absorbing board 29 is fixedly connected to one end of the push shaft 28, a polyester fiber sound-absorbing board 30 is fixedly connected to one side of the arc-shaped sound-absorbing board 29, and multiple buffer guide plates 31 are fixedly connected to the inner wall of the polyester fiber sound-absorbing board 30. Multiple connecting shafts 21 are arranged in a circular ring with equal spacing, and the cross-sectional shapes of the connecting shaft 21 and the hinge shaft 23 are both circular. The arc-shaped sound-absorbing plate 29 is slidably connected to the sliding frame 26 , and the inner wall of the arc-shaped sound-absorbing plate 29 and the outer wall of the sliding frame 26 are both smooth surfaces.

[0035] In this embodiment, as shown in the attached Figure 2-10 As shown, the interval adjustment muffler assembly includes a diffuser 32 fixedly mounted at one end of the baffle tube 13; a connecting hole 33 is provided inside the baffle tube 13 and near the diffuser 32, one end of the connecting hole 33 is fixedly connected to a butt pipe 34, and a middle decibel sensor 35 is fixedly connected to the inner wall of the butt pipe 34; A guide groove ring 36 is fixedly connected to one side of the inner wall of the diffuser 32 , and an intake guide pipe 37 is fixedly connected to one end of the diffuser 32 . A terminal partial benzene sensor 38 is fixedly connected to one side of the inner wall of the intake guide pipe 37 .

[0036] The outer wall of the guide groove ring 36 is fixedly connected with a support frame 39, and the inner part of the support frame 39 is rotatably connected with a linkage screw 40. The lower end of the inner wall of the support frame 39 is fixedly connected with a reduction motor 41, and the reduction motor 41 is used to drive the linkage screw 40 to rotate. The outer wall of the linkage screw 40 is threadedly connected with two threaded sleeves 42; one side of each threaded sleeve 42 is fixedly connected with a linkage bar 43, and one side of the linkage bar 43 is fixedly connected with two sound-absorbing clamping plates 44, and the sound-absorbing clamping plates 44 are slidably connected with the guide groove ring 36. The output end of the reduction motor 41 is fixedly connected with the lower end of the linkage screw 40, and the two threaded sleeves 42 are slidably connected with the support frame 39. The two threads on the outer wall of the linkage screw 40 are opposite and symmetrically arranged, and the vertical cross-section of the threaded sleeve 42 is L-shaped.

[0037] The operating principle of the air intake silencer for eliminating low-frequency resonant airflow of the present invention is as follows: Step 1: During docking installation, first dock the air intake pipe 1 to the air intake port of the equipment, and dock the air intake guide pipe 37 to the guide port of the guide device. After the docking connection is completed, the air intake noise airflow generated by the equipment can be transported to the inside of the air intake pipe 1, forming an air intake silencer treatment.

[0038] Step 2: When adjusting the noise at multiple points, the noise is detected by the initial decibel sensor 12 inside the air intake pipe 1. When the detected noise decibel value is greater than the noise decibel value set by the controller 17, the controller 17 starts the rotating motor 15, and the bracket 16 stably supports the angle sensor 14. The output end of the rotating motor 15 drives the sensing shaft of the angle sensor 14, and the angle sensor 14 causes the rotating shaft 2 to rotate clockwise, and the rotating shaft 2 rotates clockwise inside the two sound absorbing buckets 3. The rotating shaft 2 drives the two rotating rings 5 ​​to rotate clockwise, and the rotating ring 5 drives the linkage ring 4 to rotate clockwise. The linkage ring 4 causes multiple sound absorbing blocks 6 to rotate clockwise synchronously, and the sound absorbing blocks 6 can block the circular hole 7, so that the air intake area of ​​the noise airflow entering the circular hole 7 becomes smaller, and the sound absorbing blocks 6 can contact and buffer the noise airflow to absorb the flow rate of the noise airflow, and multiple sound absorbing blocks 6 contact the noise airflow to realize the air intake sound absorption operation.

[0039] At the same time, the sound-absorbing block 6 drives the connecting block 8 to rotate clockwise, and the connecting block 8 drives the linkage shaft 9 to rotate clockwise. The linkage shaft 9 makes the sound-absorbing baffle 10 rotate clockwise, and the sound-absorbing baffle 10 can block the position of the arc-shaped hole 11, so that the air intake area of ​​the noise airflow entering the multiple arc-shaped holes 11 becomes smaller. At the same time, the multiple sound-absorbing baffles 10 can contact, buffer and absorb the noise airflow, thereby reducing the flow rate of the noise airflow, and at the same time can reduce the noise decibel, and play an intake silencing role.

[0040] Step three, when adjusting the space for silencer, the electric cylinder 18 is started by the controller 17 at the same time, the electric cylinder 18 pushes the push block 19 to move right, the push block 19 drives the groove ring 20 to move right, the groove ring 20 makes multiple connecting shafts 21 move right synchronously, the connecting shaft 21 drives one end of the sleeve rod 22 to move right, and the position of the other end of the sleeve rod 22 can drive the hinge shaft 23 to approach the center point of the intake pipe 1, the hinge shaft 23 drives the linkage plate 24 to approach the center point of the intake pipe 1, the linkage plate 24 makes the sleeve block 25 approach the center point of the intake pipe 1, and the sleeve block 25 approaches the center point of the intake pipe 1 along the inner wall of the slide frame 26.

[0041] At the same time, the sleeve block 25 approaches the center point of the intake pipe 1 along the outer wall of the guide column 27, and the sleeve block 25 drives the push shaft 28 to approach the center point of the intake pipe 1. The push shaft 28 makes the arc-shaped sound-absorbing board 29 approach the center point of the intake pipe 1, so that multiple arc-shaped sound-absorbing boards 29 can approach the center point of the intake pipe 1 synchronously, and the arc-shaped sound-absorbing board 29 can drive the polyester fiber sound-absorbing board 30 to approach the center point of the intake pipe 1. The polyester fiber sound-absorbing board 30 drives multiple buffer guide plates 31 to approach the center point of the intake pipe 1, and the noise airflow after the speed reduction is discharged from the intake pipe 1 into the baffle pipe 13. Multiple arc-shaped sound-absorbing boards 29 approach the center point of the intake pipe 1, so that the space where the noise airflow flows between the multiple arc-shaped sound-absorbing boards 29 is reduced. At the same time, after the noise airflow contacts multiple buffer guide plates 31 and the arc-shaped sound-absorbing board 29, multi-layer sound absorption and buffering are achieved, so that the intake silencing operation of the noise airflow is performed again. Then, when the noise airflow passes through the inside of the butt joint 34, it will be sensed by the middle decibel sensor 35. When the sensed decibel value is the qualified value set by the controller 17, the rotating motor 15 is turned off, and the angle sensor 14 can know the angle value of the rotating shaft 2 at this time, and the electric cylinder 18 is turned off. When the noise detected by the middle decibel sensor 35 still exceeds the decibel value set by the controller 17, the controller 17 continues to start the reduction motor 41.

[0042] Step 4: When adjusting the interval for silencer, the noise airflow after two silencers enters the connecting hole 33 along the butt joint 34, enters the diffuser 32 from the connecting hole 33, and enters the inside of the guide groove ring 36 through the diffuser 32. The reduction motor 41 drives the linkage screw 40 to rotate, and the linkage screw 40 rotates inside the support frame 39. The linkage screw 40 drives the two threaded sleeves 42 to approach each other under the action of the thread transmission force. At the same time, the two threaded sleeves 42 respectively drive the two linkage bars 43 to approach each other, and the linkage bars 43 drive the two sound-absorbing splints 44 to move up. The two sound-absorbing splints 44 move up along the inner wall of the guide groove ring 36. At the same time, another linkage bar 43 moves down, and another linkage bar 43 drives the other two sound-absorbing splints 44 to move down, which can reduce the internal air intake area of ​​the guide groove ring 36. At the same time, multiple sound-absorbing splints 44 can absorb and block the noise airflow, so that the noise airflow is reduced and silenced again. After the third noise reduction and silence, the noise airflow enters the intake duct 37 along the guide groove ring 36, and the decibel value sensing is realized by the final decibel sensor 38 inside the intake duct 37. The decibel value sensed by the final decibel sensor 38 is lower than the decibel value set by the controller 17. In this way, the noise airflow can completely eliminate the low-frequency resonance, and at the same time, the noise airflow can be completely silenced to the specified decibel value, and the intake silencer adjustment process is thoroughly performed, and the intake silencer effect is better.

[0043] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intake silencer for eliminating low-frequency resonant airflow, comprising an intake pipe (1), a rotating shaft (2) being installed inside the intake pipe (1), and a baffle pipe (13) being fixedly connected to the outer wall of the intake pipe (1), characterized in that: The outer wall of the rotating shaft (2) is provided with a multi-point adjustable silencer mechanism; The multi-point adjustable silencer mechanism comprises two sound absorbing buckets (3) rotatably arranged on the outer wall of the rotating shaft (2), the two sound absorbing buckets (3) are fixedly connected to the air intake pipe (1), one side of the sound absorbing bucket (3) is provided with a rotatably connected linkage ring (4), the inner wall of the linkage ring (4) is fixedly connected with a rotating ring (5), the rotating ring (5) is fixedly connected to the rotating shaft (2), and the rotating ring (5) is rotatably connected to the sound absorbing bucket (3); The outer wall of the linkage ring (4) is fixedly connected to a plurality of sound absorbing blocks (6), one side of each of the sound absorbing blocks (6) is provided with a circular hole (7), the outer wall of the sound absorbing block (6) is fixedly connected to a connecting block (8), one side of the connecting block (8) is fixedly connected to a linkage shaft (9), one end of the linkage shaft (9) is fixedly connected to a sound absorbing baffle (10), one side of each of the sound absorbing baffles (10) is provided with an arc-shaped hole (11), and the plurality of sound absorbing baffles (10) are slidably connected to the sound absorbing bucket (3); An initial decibel sensor (12) fixedly connected to the air intake pipe (1) is provided on one side of the sound absorbing bucket (3), and a space adjustment muffler mechanism is installed on one side of the inner wall of the baffle pipe (13); An interval adjustment silencer assembly is installed at one end of the baffle pipe (13).

2. The air intake silencer for eliminating low-frequency resonant airflow according to claim 1, characterized in that: The sound absorbing block (6) and the connecting block (8) are both rotatably connected to the sound absorbing bucket (3); the vertical cross-sectional area of ​​the sound absorbing block (6) is larger than the vertical cross-sectional area of ​​the circular hole (7).

3. The air intake silencer for eliminating low-frequency resonant airflow according to claim 1, characterized in that: An angle sensor (14) is fixedly connected to one end of the rotating shaft (2), and a rotating motor (15) is fixedly mounted to one end of the angle sensor (14); A bracket (16) is fixedly connected to one side of the outer wall of the angle sensor (14), and the bracket (16) and the rotating motor (15) are both fixedly connected to the baffle tube (13).

4. The air intake silencer for eliminating low-frequency resonant airflow according to claim 1, characterized in that: A controller (17) is provided on one side of the air intake pipe (1), and the controller (17) is fixedly connected to the baffle pipe (13).

5. The air intake silencer for eliminating low-frequency resonant airflow according to claim 1, characterized in that: The space adjustment and silencing mechanism comprises an electric cylinder (18) fixedly mounted on one side of the inner wall of the baffle tube (13); The output end of the electric cylinder (18) is fixedly connected to a push block (19), and one end of the push block (19) is fixedly connected to a groove ring (20), the inner wall of the groove ring (20) is fixedly connected to a plurality of connecting shafts (21), and the outer wall of each connecting shaft (21) is rotatably connected to a sleeve rod (22); A hinge shaft (23) is rotatably connected to the inner wall of the sleeve rod (22) at a position away from the connecting shaft (21); a linkage plate (24) is fixedly connected to one end of the hinge shaft (23); a sleeve block (25) is fixedly connected to one end of the linkage plate (24); a sliding frame (26) is slidably connected to the outer wall of the sleeve block (25); and a plurality of sliding frames (26) are fixedly connected to the baffle tube (13); The inner wall of the sleeve block (25) is slidably connected to a guide column (27), and the guide column (27) is fixedly connected to the sliding frame (26). A push shaft (28) is fixedly installed on one side of the sleeve block (25), and an arc-shaped sound-absorbing plate (29) is fixedly connected to one end of the push shaft (28). A polyester fiber sound-absorbing plate (30) is fixedly connected to one side of the arc-shaped sound-absorbing plate (29), and a plurality of buffer guide plates (31) are fixedly connected to the inner wall of the polyester fiber sound-absorbing plate (30).

6. The air intake silencer for eliminating low-frequency resonant airflow according to claim 5, characterized in that: The plurality of connecting shafts (21) are arranged in a circular ring at equal intervals, and the cross-sectional shapes of the connecting shafts (21) and the hinge shafts (23) are both circular.

7. The air intake silencer for eliminating low-frequency resonant airflow according to claim 5, characterized in that: The arc-shaped sound absorbing plate (29) is slidably connected to the sliding frame (26); the inner wall of the arc-shaped sound absorbing plate (29) and the outer wall of the sliding frame (26) are both smooth surfaces.

8. The air intake silencer for eliminating low-frequency resonant airflow according to claim 1, characterized in that: The interval adjustment silencer assembly comprises a diffusion pipe (32) fixedly mounted on one end of the baffle pipe (13); A communication hole (33) is provided inside the baffle tube (13) and near the diffuser tube (32); one end of the communication hole (33) is fixedly connected to a butt joint tube (34); and a middle decibel sensor (35) is fixedly connected to the inner wall of the butt joint tube (34); A guide groove ring (36) is fixedly connected to one side of the inner wall of the diffuser tube (32), and an air intake guide tube (37) is fixedly connected to one end of the diffuser tube (32), and a terminal partial benzene sensor (38) is fixedly connected to one side of the inner wall of the air intake guide tube (37); The outer wall of the guide groove ring (36) is fixedly connected to a support frame (39), and the interior of the support frame (39) is rotatably connected to a linkage screw rod (40). The bottom end of the inner wall of the support frame (39) is fixedly connected to a reduction motor (41), and the reduction motor (41) is used to drive the linkage screw rod (40) to rotate. The outer wall of the linkage screw rod (40) is threadedly connected to two threaded sleeve blocks (42); One side of each threaded sleeve block (42) is fixedly connected to a linkage bar (43), one side of the linkage bar (43) is fixedly connected to two sound-absorbing clamping plates (44), and the sound-absorbing clamping plates (44) are slidably connected to the guide groove ring (36).

9. The air intake silencer for eliminating low-frequency resonant airflow according to claim 8, characterized in that: The output end of the reduction motor (41) is fixedly connected to the bottom end of the linkage screw rod (40), and the two threaded sleeve blocks (42) are both slidably connected to the support frame (39).

10. The air intake silencer for eliminating low-frequency resonant airflow according to claim 8, characterized in that: The two threads on the outer wall of the linkage screw rod (40) are opposite and symmetrically arranged, and the vertical cross-section of the threaded sleeve block (42) is L-shaped.

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