Combined silencer

Abstract

The invention discloses a combined silencer, which belongs to the technical field of automobile exhaust systems and comprises a flow guide buffer component, an air speed adjusting pipe, an air speed self-adaptive adjusting mechanism and an air outlet hole adjusting structure. The flow guide buffer assembly comprises a flow guide pipe, and flow guide plates are uniformly distributed on the inner surface of the flow guide pipe and fixedly connected with the flow guide pipe; a filter screen is arranged at one end of the flow guide pipe, fastening bolts are evenly distributed between the filter screen and the flow guide pipe, and the fastening bolts penetrate through and are in sliding connection with the filter screen and are in threaded connection with the flow guide pipe. The windward plate of the wind speed self-adaptive adjusting mechanism can sense the change of the tail gas flow speed in real time, angular displacement is converted into rotating power of the rotating rod through the transmission rod, the lifting rod and other components, and the air outlet hole adjusting structure is driven to act; when the tail gas flow is small, the ventilation holes of the first ventilation plate and the second ventilation plate completely coincide, the exhaust resistance is minimum, and rapid exhaust of the tail gas is ensured; when the flow is large, the ventilation holes are partially staggered, the exhaust flow speed is stabilized by increasing resistance, and dynamic matching of working conditions and resistance is achieved.

Description

Technical Field

[0001] This invention belongs to the field of automotive exhaust system technology, specifically referring to a combined muffler. Background Technology

[0002] The muffler in an automotive exhaust system is a core noise reduction component, directly determining the vehicle's ride comfort and environmental friendliness by attenuating the aerodynamic noise generated by exhaust gas flow. However, with the automotive industry's increasing demands for noise, vibration, and acoustic roughness performance, and the development of engine technology towards higher power and wider operating ranges, existing automotive exhaust mufflers are gradually revealing numerous technical bottlenecks, making them ill-suited to dynamically changing exhaust conditions.

[0003] 1. Under different operating conditions such as idling, acceleration, and high-speed cruising, the exhaust gas velocity of an engine can vary by 4-8 times, and the noise frequency and intensity also fluctuate drastically. Existing mufflers mostly use fixed-structure resistive muffler chambers or resistive sound-absorbing materials, and their noise reduction frequency bandwidth is fixed. When designed for low-flow exhaust gas at idle, the noise reduction effect drops sharply for high-flow exhaust gas, and the noise level can easily exceed 85dB. When optimized for high-speed operating conditions, excessive exhaust resistance at idle will lead to engine power loss, making it impossible to achieve a balance between noise reduction and power performance under all operating conditions.

[0004] 2. Traditional mufflers have a fixed internal flow channel cross-section, resulting in constant resistance to exhaust flow. At idle or low speeds, the exhaust flow is small, and the fixed resistance causes a decrease in exhaust velocity. This leads to excessively long residence time of the exhaust gas within the muffler, which can easily create reverse back pressure and cause power loss during the engine's exhaust stroke.

[0005] To address the aforementioned issues, there is an urgent need for an airflow regulation system that is adapted to the usage scenarios of automotive exhaust pipes, and features airflow guidance and buffering, adaptive wind speed adjustment, low energy consumption, and high reliability, in order to improve engine performance, reduce fuel consumption and noise, and enhance exhaust gas treatment effects. Summary of the Invention

[0006] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides a combined silencer, which effectively solves the problems currently on the market.

[0007] The technical solution adopted by this invention is as follows: This invention proposes a combined silencer, including a flow guiding and buffering assembly, a wind speed regulating pipe, a wind speed adaptive regulating mechanism, and an air outlet regulating structure; the flow guiding and buffering assembly includes a flow guiding pipe, with flow guiding plates evenly distributed on the inner surface of the flow guiding pipe, and the flow guiding plates are fixedly connected to the flow guiding pipe; a filter screen is provided at one end of the flow guiding pipe, and fastening bolts are evenly distributed between the filter screen and the flow guiding pipe, the fastening bolts penetrate and slide to connect the filter screen, and are threaded to the flow guiding pipe; the wind speed regulating pipe is detachably connected to the flow guiding pipe by bolts, and the wind speed adaptive regulating mechanism and the air outlet regulating structure are both located inside the wind speed regulating pipe, and the wind speed adaptive regulating mechanism and the air outlet regulating structure are connected by transmission.

[0008] Furthermore, it also includes a sealing gasket and a protective cover; the sealing gasket is located between the mating surfaces of the guide tube and the wind speed regulating tube; the protective cover is detachably connected to the end of the wind speed regulating tube away from the guide tube.

[0009] Furthermore, the wind speed adaptive adjustment mechanism includes a windward plate evenly distributed inside the wind speed adjustment tube, and a fixed connecting block evenly distributed on the inner surface of the wind speed adjustment tube; the fixed connecting block is fixedly connected to the wind speed adjustment tube, the windward plate is hinged to the fixed connecting block, and a torsion spring is connected between the two, one end of the torsion spring is fixedly connected to the windward plate, and the other end is fixedly connected to the fixed connecting block.

[0010] Furthermore, the wind speed adaptive adjustment mechanism also includes a fixed bracket, a transmission rod, and a lifting rod; the fixed bracket is fixedly connected to the outer surface of the windward plate, one end of the transmission rod is rotatably connected to the fixed bracket, and the other end is rotatably connected to the lifting rod; the lifting rod passes through and is slidably connected to the wind speed adjustment tube, and one end of the lifting rod extending into the wind speed adjustment tube is fixedly connected to a synchronizing rod, and the end of the synchronizing rod away from the lifting rod is fixedly connected to a movable sleeve.

[0011] Furthermore, the wind speed adaptive adjustment mechanism also includes a rotating rod and a driving bevel gear; the rotating rod passes through and is rotatably connected to the windward plate, and its outer surface is provided with a spiral groove; a protrusion is fixedly connected to the inner surface of the movable sleeve, and the protrusion is slidably connected in the spiral groove; the driving bevel gear is fixedly connected to the end of the rotating rod away from the movable sleeve.

[0012] Furthermore, the air outlet adjustment structure includes a ventilation plate one, a ventilation plate two, and a gear ring; the ventilation plate one is fixedly connected to the inside of the wind speed adjustment pipe, and the ventilation plate two is rotatably connected to the ventilation plate one; the gear ring is fixedly connected to the side of the ventilation plate two near the windward plate, and the gear ring is meshed with the drive bevel gear.

[0013] Furthermore, both ventilation plate one and ventilation plate two are provided with evenly distributed ventilation holes; the ventilation holes penetrate ventilation plate one and ventilation plate two, and when ventilation plate two rotates, its ventilation holes can overlap with the ventilation holes of ventilation plate one to varying degrees.

[0014] Furthermore, at least three sets of wind-facing plates are evenly distributed along the axial direction of the wind speed regulating pipe, and the synchronizing rods are parallel to the axis of the wind speed regulating pipe, and the synchronizing rods are simultaneously connected to the corresponding lifting rods of each set of wind-facing plates.

[0015] Furthermore, the rotating rod and the wind speed regulating pipe are coaxially arranged, the axis of the driving bevel gear coincides with the axis of the rotating rod, and the pitch circle diameter of the driving bevel gear is matched with the pitch circle diameter of the gear ring.

[0016] Furthermore, the guide plate is inclined along the axial direction of the guide tube at an angle of 30°-60°; the filter screen has a pore size of 0.5mm-2mm, and the outer diameter of the filter screen is equal to the inner diameter of the guide tube.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows:

[0018] (1) The windward plate of the wind speed adaptive adjustment mechanism can sense the change of exhaust gas speed in real time. Through components such as transmission rod and lifting rod, the angular displacement is converted into the rotational power of the rotating rod, which drives the air outlet adjustment structure to move. When the exhaust gas flow rate is small, the ventilation holes of ventilation plate one and ventilation plate two are completely overlapped, the exhaust resistance is minimized, and the exhaust gas is ensured to be discharged quickly. When the flow rate is large, the ventilation holes are partially offset, and the exhaust flow rate is stabilized by increasing the resistance, so as to achieve dynamic matching of working condition and resistance.

[0019] (2) The guide plate is evenly distributed in the guide tube of the flow buffer assembly, which can sort the turbulent exhaust gas discharged by the engine into an orderly streamlined airflow along the axis, reducing vortex and backflow phenomena; at the same time, the guide plate divides the large exhaust gas into multiple small streams, reducing the impact pressure of high-speed exhaust gas, avoiding the formation of reverse resistance on downstream structures, and improving the engine power output under rapid acceleration conditions. Attached Figure Description

[0020] Figure 1 The present invention proposes a three-dimensional combined silencer. Figure 1 ;

[0021] Figure 2 The present invention proposes a three-dimensional combined silencer. Figure 2 ;

[0022] Figure 3 This is an exploded view of a combined silencer proposed in this invention;

[0023] Figure 4 This is a cross-sectional view of the guide tube;

[0024] Figure 5 This is a cross-sectional view of the wind speed regulating pipe;

[0025] Figure 6 An exploded view of the wind speed adaptive adjustment mechanism;

[0026] Figure 7 An exploded view of part of the wind speed adaptive adjustment mechanism;

[0027] Figure 8 This is a sectional view of the movable sleeve;

[0028] Figure 9 for Figure 6 Enlarged view of the structure at point A in the middle.

[0029] The components include: 1. Flow guide and buffer assembly; 101. Flow guide pipe; 102. Flow guide plate; 103. Filter screen; 104. Fastening bolt; 2. Wind speed regulating pipe; 3. Wind speed adaptive regulating mechanism; 301. Windward plate; 302. Fixed connecting block; 303. Torsion spring; 304. Fixed bracket; 305. Transmission rod; 306. Lifting rod; 307. Synchronizing rod; 308. Movable sleeve; 309. Rotating rod; 310. Spiral groove; 311. Drive bevel gear; 312. Protrusion; 4. Air outlet adjustment structure; 401. Ventilation plate one; 402. Ventilation plate two; 403. Gear ring; 404. Ventilation hole; 5. Sealing gasket; 6. Protective cover.

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] like Figures 1-9 As shown.

[0034] In some embodiments, the flow guiding and buffering assembly 1 may include a flow guiding pipe 101; a flow guiding plate 102, which is evenly distributed on the inner surface of the flow guiding pipe 101 and is fixedly connected to the flow guiding pipe 101; a filter screen 103, which is disposed at one end of the flow guiding pipe 101; and fastening bolts 104, which are evenly distributed between the filter screen 103 and the flow guiding pipe 101, the fastening bolts 104 passing through and slidingly connecting the filter screen 103, and the fastening bolts 104 being threadedly connected to the flow guiding pipe 101.

[0035] In this process, the gas to be treated enters the component from the end of the guide pipe 101 away from the filter screen 103. The guide pipe 101 serves as a channel for fluid transport, providing a stable flow space for subsequent processing and preventing the fluid from spreading randomly. When the fluid flows in the guide pipe 101, it comes into contact with the guide plates 102 that are evenly distributed on the inner surface of the pipe. The guide plates 102 guide the fluid in a directional manner through their own structural shape, sorting the turbulent fluid into an orderly streamlined flow. At the same time, the guide plates 102 can divide large streams of fluid into multiple small streams, reducing the flow speed and impact force of the fluid, achieving a buffering effect on the fluid, and preventing vibration or damage caused by high-speed fluid directly impacting the subsequent structure.

[0036] In this embodiment, the uniformly distributed guide plates 102 can comprehensively manage turbulent fluids, transforming disordered flow into ordered flow along the axial direction of the guide pipe. This effectively reduces eddies and backflow within the pipe, improving fluid flow stability by over 40%. It is particularly suitable for scenarios with high requirements for fluid flow direction, providing stable fluid conditions for subsequent processes. The guide plates divide the fluid and reduce its velocity, significantly weakening the impact force of the fluid—for high-speed fluids, the impact pressure can be reduced by over 50%, preventing the fluid from directly impacting the filter or downstream equipment, reducing equipment vibration and wear, and extending the service life of the entire system. At the same time, the buffering effect can also reduce noise generated by fluid flow and improve the working environment.

[0037] In some embodiments, the system also includes a wind speed regulating pipe 2, which is detachably connected to the guide pipe 101 by bolts; a sealing gasket 5, which is disposed between the guide pipe 101 and the wind speed regulating pipe 2; and a protective cover 6, which is detachably connected to the wind speed regulating pipe 2.

[0038] In some embodiments, the wind speed adaptive adjustment mechanism 3 may include a windward plate 301, evenly distributed inside the wind speed regulating pipe 2; a fixed connecting block 302, evenly distributed on the inner surface of the wind speed regulating pipe 2, and the fixed connecting block 302 is fixedly connected to the wind speed regulating pipe 2; a torsion spring 303, one end of which is fixedly connected to the windward plate 301, and the other end of which is fixedly connected to the fixed connecting block 302; a fixed bracket 304, fixedly connected to the outer surface of the windward plate 301; a transmission rod 305, one end of which is rotatably connected to the fixed bracket 304 near the fixed bracket 304; and a lifting rod. 306, penetrating and slidably connected to the wind speed regulating pipe 2; synchronizing rod 307, fixedly connected to the lifting rod 306; movable sleeve 308, fixedly connected to the end of the synchronizing rod 307 away from the lifting rod 306; rotating rod 309, penetrating and rotatably connected to the windward plate 301; spiral groove 310, formed on the outer surface of the rotating rod 309; driving bevel gear 311, fixedly connected to the end of the rotating rod 309 away from the movable sleeve 308; protrusion 312, fixedly connected to the inner surface of the movable sleeve 308, and the protrusion 312 slidably connected in the spiral groove 310.

[0039] The windward plate 301 is hinged to the fixed connecting block 302, and the end of the transmission rod 305 away from the fixed bracket 304 is rotatably connected to the lifting rod 306.

[0040] When airflow passes through the wind speed regulating pipe 2, the evenly distributed windward plates 301 inside the pipe directly contact the airflow. The windward plates 301 are connected to the fixed connecting block 302 through a hinge structure, forming a rotatable force-bearing carrier. When the wind speed changes, the wind force on the windward plates 301 changes, overcoming the elastic constraint force of the torsion spring 303 and rotating around the hinge point, thus realizing real-time sensing of wind speed changes. When the windward plates 301 rotate, the fixed bracket 304 fixed on its outer surface synchronously drives the transmission rod 305 to move. One end of the transmission rod 305 is rotatably connected to the fixed bracket 304, and the other end is rotatably connected to the lifting rod 306. The lifting rod 306 passes through and slides through the wind speed regulating pipe 2. The angular displacement of the wind vane 301 is converted into the pushing and pulling action of the transmission rod 305, which in turn drives the lifting rod 306 to move linearly up and down along the axial direction of the wind speed regulating pipe 2. The lifting rod 306 is fixedly connected to the synchronizing rod 307. The linear motion of the lifting rod 306 drives the synchronizing rod 307 and the movable sleeve 308 fixed at the end of the synchronizing rod 307 to move up and down synchronously. The protrusion 312 on the inner surface of the movable sleeve 308 is embedded in the spiral groove 310 on the outer surface of the rotating rod 309. When the movable sleeve 308 moves up and down, the protrusion 312 slides in the spiral groove 310. Through the guiding effect of the spiral structure, the linear motion is converted into the rotational motion of the rotating rod 309, which in turn causes the drive bevel gear 311 to rotate.

[0041] In this embodiment, the wind vane 301 is evenly distributed inside the wind speed regulating pipe 2, which can capture airflow changes in the pipe from all directions. The combination of the hinge structure and the torsion spring 303 makes the wind vane 301 extremely sensitive to wind speed changes, and even a slight wind speed fluctuation can trigger the adjustment action. The mechanical transmission link has no signal delay, and compared with the electronic adjustment mechanism, the response speed is improved, and it can match wind speed changes in real time.

[0042] In some embodiments, the air outlet adjustment structure 4 may include a ventilation plate 401, which is fixedly connected to the inside of the wind speed regulating pipe 2; a ventilation plate 402, which is rotatably connected to the ventilation plate 401; a toothed ring 403, which is fixedly connected to the side of the ventilation plate 402 near the windward plate 301; and ventilation holes 404, which are evenly opened on the ventilation plate 401 and the ventilation plate 402.

[0043] The gear ring 403 meshes with and drives the bevel gear 311. The ventilation hole 404 penetrates and connects to the ventilation plate 401 and the ventilation hole 404 penetrates and connects to the ventilation plate 402.

[0044] When a change in wind speed triggers the wind speed adaptive adjustment mechanism 3, the drive bevel gear 311 at the end of the mechanism generates rotational power. The gear ring 403 of the air outlet adjustment structure 4 meshes with the drive bevel gear 311, so the rotation of the drive bevel gear 311 directly drives the gear ring 403 to rotate synchronously. The gear ring 403 is fixedly connected to the side of the second ventilation plate 402 near the windward plate 301, thereby transmitting the rotational power to the second ventilation plate 402. The first ventilation plate 401 is fixedly connected inside the wind speed adjustment pipe 2, providing a stable reference for the entire adjustment structure. The second ventilation plate 402 and the first ventilation plate 401 are rotatably connected and can rotate flexibly around their connecting axis. When the second ventilation plate 402 rotates under the drive of the gear ring 403, the ventilation holes 404 evenly opened on its surface will change relative to the ventilation holes 404 on the first ventilation plate 401. When the ventilation holes 404 of the two plates are completely overlapped, the air outlet channel area is the largest; when the second ventilation plate 402 rotates to the point where the ventilation holes 404 are partially misaligned, the air outlet channel area decreases; when the ventilation holes 404 of the two plates are completely misaligned, the air outlet channel is closed. The air outlet resistance and air volume are adjusted by changing the degree of overlap of the holes. When the wind speed increases, the drive bevel gear 311 drives the gear ring 403 to rotate the second ventilation plate 402 in the direction where the degree of overlap of the ventilation holes 404 decreases, reducing the air outlet channel area and increasing the ventilation resistance, thereby reducing the air outlet wind speed and avoiding the impact of high-speed airflow on downstream equipment. When the wind speed decreases, the drive bevel gear 311 rotates in the opposite direction, driving the second ventilation plate 402 to rotate in the direction where the degree of overlap of the ventilation holes 404 increases, expanding the air outlet channel area, reducing the ventilation resistance, improving the air outlet efficiency, and ensuring stable air volume. When the wind speed returns to its initial state, under the reset action of the wind speed adaptive adjustment mechanism 3, the drive bevel gear 311 drives the gear ring 403 and the ventilation plate 402 to return to their initial positions, and the ventilation holes 404 of the two plates return to their initial overlap, completing one air volume adaptive adjustment cycle.

[0045] In this embodiment, the ventilation holes 404 on ventilation plate 1 401 and ventilation plate 2 402 are evenly distributed. Through the precise meshing of the gear ring 403 and the drive bevel gear 311, the rotation angle of ventilation plate 2 402 can be precisely controlled, making the overlap area adjustment accuracy of the ventilation holes 404 on the two plates extremely high. This enables linear adjustment of air volume. Compared with the traditional louver-type adjustment structure, the air volume control error is reduced, and it can accurately match the air volume requirements of different working conditions. Through the rigid meshing of the gear ring 403 and the drive bevel gear 311, the air outlet adjustment structure 4 and the wind speed adaptive adjustment mechanism 3 form a power transmission link without delay. After the wind speed change triggers the adjustment mechanism to act, the air outlet structure can complete the corresponding adjustment. The response speed is much faster than that of the independent adjustment structure, realizing real-time synchronization of "wind speed change - air volume adjustment".

[0046] In practical use, the guide pipe 101 of the flow guide buffer assembly 1 is connected to the exhaust manifold of the car engine by bolts. The other end of the guide pipe 101 is connected to the wind speed regulating pipe 2 by detachable bolts. The sealing gasket 5 between the two ensures a sealed connection. A protective cover 6 is installed at the end of the wind speed regulating pipe 2. The wind speed adaptive adjustment mechanism 3 and the air outlet adjustment structure 4 are installed inside in sequence. In the initial state, the torsion spring 303 is in a natural extension and contraction state, the wind vane 301 maintains the initial angle, and the ventilation holes 404 of the ventilation plate 401 and the ventilation plate 402 of the air outlet adjustment structure 4 are in a semi-overlapping state, which is suitable for the engine idling condition.

[0047] The exhaust gas enters from the end of the guide pipe 101 away from the filter screen 103, and the guide pipe 101 provides a stable flow channel for the exhaust gas. When the exhaust gas flows through the guide plates 102 that are evenly distributed inside the pipe, it is combed into an orderly airflow along the axial direction, and the eddy and backflow phenomena are suppressed. At the same time, the guide plates 102 divide the large exhaust gas into multiple small streams, reduce the exhaust gas velocity and impact pressure, avoid direct impact on the filter screen 103 and the downstream wind speed regulation mechanism, and complete the pretreatment of the exhaust gas.

[0048] The pre-treated exhaust gas enters the wind speed regulating pipe 2 and comes into contact with the wind vanes 301 that are evenly distributed inside the pipe. The wind vanes 301 are connected to the fixed connecting block 302 through a hinge structure. When the engine operating conditions change and the exhaust gas speed increases, the wind force on the wind vanes 301 increases, which overcomes the elastic constraint force of the torsion spring 303 and rotates around the hinge point, increasing the angle. When idling or decelerating, the exhaust gas speed decreases, and the torsion spring 303 pulls the wind vanes 301 to rotate in the opposite direction and reset.

[0049] When the wind vane 301 rotates, the fixed bracket 304 on its outer surface drives the transmission rod 305 to move. The transmission rod 305 converts the angular displacement into a push-pull action, driving the lifting rod 306 to rise or fall along the axial direction of the wind speed regulating pipe 2. The lifting rod 306 drives the synchronous rod 307 and the movable sleeve 308 to move synchronously. The protrusion 312 in the movable sleeve 308 slides in the spiral groove 310 of the rotating rod 309, converting the linear motion into the rotational motion of the rotating rod 309, which in turn drives the drive bevel gear 311 to rotate synchronously.

[0050] The drive bevel gear 311 meshes with the gear ring 403 of the air outlet adjustment structure 4. Its rotation drives the gear ring 403 and the second ventilation plate 402 to rotate. When the exhaust gas velocity increases, the second ventilation plate 402 rotates in the direction of decreasing overlap of the ventilation holes 404. The overlap area decreases, the exhaust passage narrows, the exhaust resistance increases, the exhaust gas velocity decreases, and high-speed exhaust gas is prevented from impacting the end of the exhaust pipe and generating high-frequency noise. When the exhaust gas velocity decreases, the second ventilation plate 402 rotates in the opposite direction, the overlap area of ​​the ventilation holes 404 increases, the exhaust resistance decreases, the exhaust gas is ensured to be discharged quickly, and the formation of reverse pressure is prevented from affecting the engine power.

[0051] When the engine operating condition stabilizes and the exhaust gas velocity remains constant, the wind force on the wind vane 301 and the elastic force of the torsion spring 303 are balanced, and all transmission components remain stable, with the overlapping area of ​​the ventilation holes 404 fixed. When the engine is turned off, the exhaust gas stops flowing, the torsion spring 303 releases its elastic potential energy, and pulls the wind vane 301, transmission rod 305, lifting rod 306 and other components back to their initial positions. The ventilation holes 404 return to a semi-overlapping state, preparing for the next start. The above is the overall workflow of this invention. This step can be repeated for the next use. The actual operation process is very simple and easy.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0054] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A combined silencer, characterized in that: The device includes a flow-guiding buffer assembly (1), a wind speed regulating pipe (2), a wind speed adaptive regulating mechanism (3), and an air outlet regulating structure (4). The flow-guiding buffer assembly (1) includes a flow-guiding pipe (101), and a flow-guiding plate (102) is evenly distributed on the inner surface of the flow-guiding pipe (101). The flow-guiding plate (102) is fixedly connected to the flow-guiding pipe (101). A filter screen (103) is provided at one end of the flow-guiding pipe (101). Fastening bolts (104) are evenly distributed between the filter screen (103) and the flow-guiding pipe (101). The fastening bolts (104) pass through and slide to connect the filter screen (103), and are threaded to connect the flow-guiding pipe (101). The wind speed regulating pipe (2) is detachably connected to the flow-guiding pipe (101) by bolts. The wind speed adaptive regulating mechanism (3) and the air outlet regulating structure (4) are both located inside the wind speed regulating pipe (2), and the wind speed adaptive regulating mechanism (3) and the air outlet regulating structure (4) are connected by transmission.

2. The combined silencer according to claim 1, characterized in that: It also includes a sealing gasket (5) and a protective cover (6); the sealing gasket (5) is located between the mating surfaces of the guide pipe (101) and the wind speed regulating pipe (2); the protective cover (6) is detachably connected to the end of the wind speed regulating pipe (2) away from the guide pipe (101).

3. A combined silencer according to claim 2, characterized in that: The wind speed adaptive adjustment mechanism (3) includes a windward plate (301) evenly distributed inside the wind speed adjustment pipe (2) and a fixed connecting block (302) evenly distributed on the inner surface of the wind speed adjustment pipe (2); the fixed connecting block (302) is fixedly connected to the wind speed adjustment pipe (2), the windward plate (301) is hinged to the fixed connecting block (302), and a torsion spring (303) is connected between the two. One end of the torsion spring (303) is fixedly connected to the windward plate (301), and the other end is fixedly connected to the fixed connecting block (302).

4. A combined silencer according to claim 3, characterized in that: The wind speed adaptive adjustment mechanism (3) also includes a fixed bracket (304), a transmission rod (305), and a lifting rod (306); the fixed bracket (304) is fixedly connected to the outer surface of the windward plate (301), one end of the transmission rod (305) is rotatably connected to the fixed bracket (304), and the other end is rotatably connected to the lifting rod (306); the lifting rod (306) passes through and is slidably connected to the wind speed adjustment pipe (2), and one end of the lifting rod (306) extending into the wind speed adjustment pipe (2) is fixedly connected to a synchronizing rod (307), and the end of the synchronizing rod (307) away from the lifting rod (306) is fixedly connected to a movable sleeve (308).

5. A combined silencer according to claim 4, characterized in that: The wind speed adaptive adjustment mechanism (3) also includes a rotating rod (309) and a driving bevel gear (311); the rotating rod (309) passes through and is rotatably connected to the windward plate (301), and a spiral groove (310) is opened on its outer surface; a protrusion (312) is fixedly connected to the inner surface of the movable sleeve (308), and the protrusion (312) is slidably connected in the spiral groove (310); the driving bevel gear (311) is fixedly connected to the end of the rotating rod (309) away from the movable sleeve (308).

6. A combined silencer according to claim 5, characterized in that: The air outlet adjustment structure (4) includes a ventilation plate one (401), a ventilation plate two (402) and a gear ring (403); the ventilation plate one (401) is fixedly connected to the inside of the wind speed regulating pipe (2), and the ventilation plate two (402) is rotatably connected to the ventilation plate one (401); the gear ring (403) is fixedly connected to the side of the ventilation plate two (402) near the windward plate (301), and the gear ring (403) is meshed with the drive bevel gear (311).

7. A combined silencer according to claim 6, characterized in that: Ventilation holes (404) are evenly distributed on both ventilation plate one (401) and ventilation plate two (402); the ventilation holes (404) penetrate through ventilation plate one (401) and ventilation plate two (402), and when ventilation plate two (402) rotates, its ventilation holes (404) can overlap with the ventilation holes (404) of ventilation plate one (401) to varying degrees.

8. A combined silencer according to claim 7, characterized in that: At least three sets of wind-facing plates (301) are evenly distributed along the axial direction of the wind speed regulating pipe (2). The synchronizing rod (307) is parallel to the axis of the wind speed regulating pipe (2), and the synchronizing rod (307) is simultaneously connected to the lifting rod (306) corresponding to each set of wind-facing plates (301).

9. A combined silencer according to claim 8, characterized in that: The rotating rod (309) is coaxially arranged with the wind speed regulating pipe (2), the axis of the driving bevel gear (311) coincides with the axis of the rotating rod (309), and the pitch circle diameter of the driving bevel gear (311) is matched with the pitch circle diameter of the gear ring (403).

10. A combined silencer according to claim 9, characterized in that: The guide plate (102) is inclined along the axial direction of the guide tube (101) at an angle of 30°-60°; the filter screen (103) has a pore size of 0.5mm-2mm, and the outer diameter of the filter screen (103) is equal to the inner diameter of the guide tube (101).

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