CN115653710B - Airflow silencer for engine and working method - Google Patents
Airflow silencer for engine and working method Download PDFInfo
- Publication number
- CN115653710B CN115653710B CN202211699995.6A CN202211699995A CN115653710B CN 115653710 B CN115653710 B CN 115653710B CN 202211699995 A CN202211699995 A CN 202211699995A CN 115653710 B CN115653710 B CN 115653710B
- Authority
- CN
- China
- Prior art keywords
- inlet pipe
- air inlet
- air
- rotating shaft
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Exhaust Silencers (AREA)
Abstract
The invention discloses an airflow silencer for an engine and a working method, and belongs to the technical field of airflow silencers. An airflow silencer for an engine comprises a silencing chamber, wherein an air inlet pipe and an air outlet pipe are respectively connected to two sides of the silencing chamber, uniformly distributed air outlets are formed in the air inlet pipe, the air inlet pipe is communicated with the silencing chamber through the air outlets, a piston is arranged in the air inlet pipe in a sliding mode, and an adjusting mechanism for driving the piston to move is arranged on the air inlet pipe; the invention improves the silencing effect of the air flow silencer, ensures that the exhaust air flow keeps uniform flow velocity, ensures that the silencing material fully absorbs and converts sound energy, and effectively reduces exhaust back pressure; in the process, the kinetic energy of the noise airflow is converted into mechanical energy for rotating the rotating shaft, so that the noise energy of various frequencies is weakened quickly, the air inlet pipe is blown by the sound energy conversion mechanism for heat dissipation, the silencer is cooled, the temperature of the whole engine is reduced, and the service lives of the silencer and the engine are prolonged.
Description
Technical Field
The invention relates to the technical field of airflow silencers, in particular to an airflow silencer for an engine and a working method.
Background
Turbine engines are a form of engine that uses rotating parts to extract kinetic energy from fluid passing through them, often used on large vessels. Turbine engine exhaust noise is a major source of large vessel noise, and the noise it produces has high frequency sharp and harsh components. In order to reduce exhaust noise, exhaust mufflers are commonly used for exhaust, and mufflers are also the most effective noise reduction means commonly used for controlling exhaust noise. The silencer is a device which is arranged on an airflow channel of the aerodynamic equipment or in an air inlet and exhaust system and reduces noise, can block the propagation of sound waves and allow airflow to pass through, and is an effective tool for controlling the noise.
However, the exhaust flow of the engine changes with the change of the working condition, especially, the exhaust flow is increased due to the increase of the rotating speed of the engine, and the area of the airflow cross section of the silencer is fixed, so that the flow velocity is too high, which not only causes larger airflow regeneration noise and reduces the silencing capability of the silencer, but also causes too large exhaust back pressure and increases the oil consumption.
In the prior art, an invention patent with a patent application number of CN201010151602.9 discloses an exhaust muffler capable of automatically adjusting an overflowing area, wherein a piston can automatically adjust a position according to the size of exhaust pressure and return under the action of a spring when the exhaust pressure is small, so that the flow cross-sectional area of an airflow can be adjusted according to the exhaust flow of an engine under different working conditions, and the exhaust airflow can keep uniform flow speed. However, the silencer still has the defects in the specific use process: when the exhaust flow of the engine is overlarge, airflow flows in the air inlet pipe, the airflow flows outwards from the through hole of the air inlet pipe close to the air inlet direction, the subsequent airflow pushes the piston, and when the piston is not adjusted to a proper position, the airflow speed flowing out of the through hole is overlarge, so that the situations of transient regenerative noise and exhaust back pressure still occur; simultaneously thereby current muffler adopts the amortization cotton to absorb the sound wave and reaches the effect of amortization, and when the noise air current was when strikeing muffler inner structure fast, the conversion efficiency of aforementioned form was lower, and noise cancelling material and gas are difficult to take place rapid heating up, and sound energy is too late to be absorbed by the fast transformation promptly for the noise that produces when engine high pressure waste gas discharges does not obtain good solution.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an airflow silencer for an engine and an operating method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an air current muffler for engine, includes the amortization room, the both sides of amortization room are connected with intake pipe and outlet duct respectively, set up evenly distributed's gas vent in the intake pipe, the intake pipe passes through the gas vent and communicates with the amortization room each other, it is provided with the piston to slide in the intake pipe, be provided with the adjustment mechanism who is used for driving the piston displacement in the intake pipe, intake pipe outside cover is equipped with the shell, the shell links to each other with the amortization room, be provided with the acoustic energy conversion mechanism that is used for the cooling in the intake pipe, be provided with frictional force adjusting part between acoustic energy conversion mechanism and the adjustment mechanism.
Preferably, adjustment mechanism is including rotating the first pivot of setting in the intake pipe, the first pivot outside is provided with first baffle, the activity is provided with first elasticity telescopic link between the inner wall of first baffle and intake pipe, the one end that first baffle was kept away from to first pivot is passed the intake pipe and is connected with the gear wheel, the first support plate of fixedly connected with in the intake pipe, be provided with first bull stick on the first support plate, be provided with the pinion of being connected with gear wheel toothing on the first bull stick, be provided with from the driving wheel on the first bull stick, slide in the intake pipe and be provided with and follow the rack plate of driving wheel meshing connection, be provided with first stay cord between rack plate and the piston, be provided with first elastic element between piston and the amortization indoor wall.
Preferably, the acoustic energy conversion mechanism comprises a rotating shaft which is rotatably arranged on the air inlet pipe, a stirring piece is arranged on the rotating shaft, one end, far away from the stirring piece, of the rotating shaft penetrates through the air inlet pipe and is connected with a rotating disc, and fan blades which are uniformly distributed on the circumference are arranged on the rotating disc.
Preferably, the sound energy conversion mechanism further comprises an air deflector fixedly arranged on the air inlet pipe, and a plurality of air guide grooves matched with the poking pieces are obliquely formed in the air deflector.
Preferably, the friction force adjusting assembly comprises a second elastic telescopic rod fixedly arranged on the rack plate, one end, far away from the rack plate, of the second elastic telescopic rod is provided with a curved surface friction plate, and the curved surface friction plate is movably abutted to the rotating shaft.
Preferably, a second rotating shaft is further rotatably arranged in the air inlet pipe, a second baffle is arranged on the second rotating shaft, a third elastic telescopic rod is movably arranged between the second baffle and the air inlet pipe, one end, far away from the second baffle, of the second rotating shaft penetrates through the air inlet pipe and is provided with a worm, a second support plate is fixedly connected to the air inlet pipe, a second rotating rod is arranged on the second support plate, a worm wheel meshed with the worm is arranged on the second rotating rod, a winding roller is further arranged on the second rotating rod, a second pull rope is wound and connected to the winding roller, one end, far away from the winding roller, of the second pull rope is connected with a movable plate used for plugging the air guide groove, the movable plate is slidably arranged in the air inlet pipe and is in sliding fit with the air guide plate, and a second elastic element is arranged between the movable plate and the air inlet pipe.
Preferably, the air inlet pipe is further provided with two side plates, a guide rod is arranged between the two side plates, and the second pull rope is arranged on the guide rod in a sliding mode.
Preferably, a sound insulation layer is arranged in a sound attenuation cavity of the sound attenuation chamber, and the sound insulation layer is made of sound attenuation cotton.
Preferably, the air inlet end of the air outlet pipe is arranged in the silencing chamber, the air outlet end of the air outlet pipe is arranged outside the silencing chamber, and the air outlet end of the air outlet pipe is arranged in a horn shape.
The invention also discloses a working method of the airflow silencer for the engine, which comprises the following steps:
s1: waste gas generated by the engine is conveyed through the air inlet pipe and enters the silencing chamber through the air outlet, aerodynamic noise is silenced, and the silenced air flow is discharged out of the silencing chamber through the air outlet pipe;
s2: when the engine displacement is larger, the exhaust gas entering the air inlet pipe pushes the first baffle plate to enable the first baffle plate to turn upwards by taking the first rotating shaft as a circle center, and in the turning process, the adjusting mechanism adjusts the position of the piston in the air inlet pipe to enable the number of the right-moving exhaust ports of the piston to be increased, so that the gas flow area is increased; when the exhaust pressure is reduced, the piston is reset to move left to reduce the flow area, so that the flow area is changed along with the change of the exhaust flow, and the air flow rate discharged into the silencing chamber through the exhaust port of the air inlet pipe is stable;
s3: when the engine displacement is increased, the exhaust gas entering the air inlet pipe is guided by the air deflector to drive the sound energy conversion mechanism to act, so that the rotating shaft drives the fan blades to blow and radiate the air inlet pipe, the temperature of the silencer is reduced, the air sound energy is converted into mechanical energy for driving the rotating shaft to rotate, the noise energy is reduced, the friction force adjusting assembly arranged between the adjusting mechanism and the sound energy conversion mechanism works, the friction force between the curved surface friction plate and the rotating shaft is increased, and the rotating speed of the rotating shaft is reduced;
s4: when the engine displacement is small, the thrust of the waste gas to the second baffle is small, the third elastic telescopic rod is enabled to push the second baffle to deflect downwards by taking the second rotating shaft as a circle center, the second rotating shaft is enabled to drive the worm to be meshed with the worm wheel on the second rotating rod, the second rotating rod is enabled to drive the winding roller to rotate to wind the second pull rope, the movable plate is enabled to move towards the center of the air inlet pipe, the movable plate seals part of air guide grooves on the air guide plate, the waste gas in the air inlet pipe passes through the air guide grooves which are not sealed, the air flowing speed is accelerated, the pushing force is generated on the stirring sheet, the rotating shaft is enabled to keep running at a more uniform speed, and the air inlet pipe is cooled.
Compared with the prior art, the invention provides an airflow silencer for an engine and a working method, and the airflow silencer has the following beneficial effects:
1. according to the airflow silencer for the engine and the working method, the position of a piston in an air inlet pipe is adjusted through an adjusting mechanism, so that the adjustment of the position of the piston can be completed before exhaust gas is exhausted to a silencing chamber through an exhaust port, the overflowing area of the exhaust port is changed, the situation that when the exhaust flow of the engine is overlarge in a background document, airflow flows in the air inlet pipe, the airflow flows outwards from a through hole of the air inlet pipe close to the air inlet direction, the subsequent airflow pushes the piston, and when the piston is not adjusted to a proper position, the airflow speed flowing out of the through hole is overlarge, and transient regenerative noise and exhaust back pressure are caused is avoided; therefore, the exhaust airflow keeps uniform flow velocity, the sound energy is fully absorbed and converted by the silencing material, and the exhaust back pressure is effectively reduced.
2. According to the airflow silencer for the engine and the working method, when the exhaust flow is too large, the sound energy conversion mechanism acts to convert the kinetic energy of the noise airflow into the mechanical energy of the rotation of the rotating shaft, so that the noise energy of various frequencies is weakened quickly, the sound energy conversion mechanism blows air to the air inlet pipe for heat dissipation, the silencer is cooled, the temperature of the whole engine is reduced, and the service lives of the silencer and the engine are prolonged.
3. According to the airflow silencer for the engine and the working method, when the exhaust flow is too large, the adjusting mechanism is matched with the sound energy conversion mechanism, so that the friction force adjusting assembly acts, the friction force between the curved surface friction plate and the rotating shaft is increased, the rotating speed of the rotating shaft is reduced, and the airflow regeneration noise caused by the fact that the rotating speed of the rotating shaft is too fast and the fan blades rotate too fast is avoided.
4. When the exhaust flow is too low, the thrust of waste gas to the second baffle is small, the third elastic telescopic rod pushes the second baffle to deflect downwards by taking the second rotating shaft as a circle center, the second rotating shaft drives the worm to be meshed with the worm wheel on the second rotating rod, the second rotating rod drives the winding roller to rotate to wind the second pull rope, the movable plate moves to the center of the air inlet pipe and plugs part of air guide grooves on the air guide plate, so that the waste gas in the air inlet pipe passes through the unblocked air guide grooves, the air flowing speed is accelerated, the pushing force is generated on the stirring sheet, the rotating shaft is accelerated, the rotating shaft can keep uniform speed operation in the whole operation process, and the problem that the rotating speed affects the cooling work of the air inlet pipe too slowly is avoided.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2 according to the present invention;
FIG. 4 is a schematic view of a partial cross-sectional structure of an intake pipe according to the present invention;
FIG. 5 is a schematic view of a partial cross-sectional structure of an intake pipe according to the present invention;
FIG. 6 is an external view of the intake pipe of the present invention;
FIG. 7 is an enlarged view of a portion of portion B of FIG. 6 according to the present invention;
FIG. 8 is an enlarged view of a portion of portion C of FIG. 6 according to the present invention;
FIG. 9 is a schematic structural view of the movable plate and the air deflector of the present invention;
FIG. 10 is a cross-sectional view of the wind deflector of the present invention;
fig. 11 is a schematic structural diagram of the acoustic energy conversion mechanism of the present invention.
In the figure: 1. a sound deadening chamber; 2. an air inlet pipe; 201. an exhaust port; 202. a piston; 2021. a first elastic element; 203. a first support plate; 204. a second support plate; 3. an air outlet pipe; 4. a housing; 5. a first rotating shaft; 501. a first baffle plate; 502. a first elastic telescopic rod; 503. a bull gear; 6. a first rotating lever; 601. a pinion gear; 602. a driven wheel; 603. a rack plate; 604. a first pull cord; 7. a rotating shaft; 701. a toggle sheet; 8. rotating the disc; 801. a fan blade; 9. an air deflector; 901. a wind guide groove; 10. a second elastic telescopic rod; 1001. a curved friction plate; 11. a second rotating shaft; 111. a second baffle; 112. a worm; 113. a third elastic telescopic rod; 12. a second rotating rod; 121. a worm gear; 122. a wind-up roll; 123. a second pull cord; 13. a movable plate; 131. a second elastic element; 14. a side plate; 141. a guide bar; 15. and a sound insulation layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1:
referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, an air flow muffler for an engine, including anechoic chamber 1, the both sides of anechoic chamber 1 are connected with intake pipe 2 and outlet duct 3 respectively, evenly distributed's gas vent 201 has been seted up on intake pipe 2, intake pipe 2 communicates with anechoic chamber 1 each other through gas vent 201, it is provided with piston 202 to slide in intake pipe 2, be provided with the adjustment mechanism who is used for driving piston 202 displacement on the intake pipe 2, 2 outside covers of intake pipe are equipped with shell 4, shell 4 links to each other with anechoic chamber 1, be provided with the acoustic energy conversion mechanism that is used for the cooling on the intake pipe 2, be provided with frictional force adjusting part between acoustic energy conversion mechanism and the adjustment mechanism.
Specifically, the exhaust gas generated by the engine is conveyed through an air inlet pipe 2 and enters a silencing chamber 1 through an air outlet 201, the aerodynamic noise is silenced, the silenced air flow is exhausted out of the silencing chamber 1 through an air outlet pipe 3, when the engine displacement is large, the exhaust gas entering the air inlet pipe 2 pushes a first baffle 501, the first baffle 501 is turned downwards by taking a first rotating shaft 5 as a circle center, in the turning process, the exhaust gas is discharged to the silencing chamber 1 through the air outlet 201, the position of a piston 202 can be adjusted, the flow area of the air outlet 201 is changed, and the situation that when the engine exhaust flow in a background file is too large, the air flow flows in the air inlet pipe 2, the air flow rate flows outwards from a through hole of the air inlet pipe 2 close to the air inlet direction, the subsequent air flow pushes the piston 202 again, and when the piston 202 is not adjusted to a proper position, the air flow rate flowing out from a through hole is too large, and transient regenerative noise and exhaust back pressure are caused is avoided; thereby the exhaust airflow keeps uniform flow velocity, the sound energy is fully absorbed and converted by the silencing material, and the exhaust back pressure is effectively reduced; in the process, the kinetic energy of the noise airflow is converted into the mechanical energy of the work of the sound energy conversion mechanism, so that the noise energy of various frequencies is weakened quickly, the sound energy conversion mechanism blows air to the air inlet pipe 2 for heat dissipation, the temperature of the air inlet pipe 2 raised when hot waste gas is conveyed is reduced, the silencer is cooled, the temperature of the whole engine is reduced, and the service lives of the silencer and the engine are prolonged.
Example 2:
referring to fig. 2, 3, 4, 5, and 6, in addition to embodiment 1, the adjusting mechanism includes a first rotating shaft 5 rotatably disposed on the air inlet pipe 2, a first baffle 501 is disposed outside the first rotating shaft 5, a first elastic telescopic rod 502 is movably disposed between the first baffle 501 and an inner wall of the air inlet pipe 2, one end of the first rotating shaft 5, which is far away from the first baffle 501, penetrates through the air inlet pipe 2 and is connected with a large gear 503, a first support plate 203 is fixedly connected to the air inlet pipe 2, a first rotating rod 6 is disposed on the first support plate 203, a pinion 601 engaged with the large gear 503 is disposed on the first rotating rod 6, a driven wheel 602 is disposed on the first rotating rod 6, a rack plate 603 engaged with the driven wheel 602 is slidably disposed on the air inlet pipe 2, a first pull rope 604 is disposed between the rack plate 603 and the piston 202, and a first elastic element 2021 is disposed between the piston 202 and an inner wall of the muffling chamber 1.
Specifically, when the exhaust displacement of the engine is small, the first baffle 501 is connected with the intake pipe 2 through the first elastic expansion link 502, so that the first baffle 501 and the pipe wall of the intake pipe 2 form a certain angle, which is convenient for the circulation of exhaust gas, when the exhaust flow of the engine is too large, the exhaust gas entering the intake pipe 2 pushes the first baffle 501, so that the first baffle 501 turns upwards around the first rotating shaft 5, during the turning process, the adjusting mechanism adjusts the position of the piston 202 in the intake pipe 2, the first rotating shaft 5 rotates to drive the bull gear 503 to rotate, the bull gear 503 is meshed with the pinion 601 on the first rotating shaft 6, the pinion 601 drives the first rotating shaft 6 to rotate, the first rotating shaft 6 drives the driven wheel 602 to be meshed with the rack plate 603 when rotating, so that the rack plate 603 displaces and pulls the piston 202 to move in the intake pipe 2 through the first pull rope 604, so that the number of the piston 202 moving to the right side of the exhaust port 201 is increased, thereby increasing the flow area of the gas, when the exhaust gas is conveyed to the region of the exhaust port 201 along the intake pipe 2, the piston 202 has completed position adjustment, and the exhaust flow of the exhaust gas flow is temporarily caused by the flow from the exhaust flow in the exhaust port 2, and the exhaust flow of the exhaust gas flow is not caused by the exhaust flow, the situation that the exhaust flow rate of the piston 202 flows from the exhaust port 202, and the exhaust flow of the exhaust port 202, and the exhaust gas flow rate of the exhaust port 202 is temporarily; when the exhaust pressure decreases, the piston 202 is reset to move left under the action of the first elastic element 2021 to reduce the flow area, so that the flow area changes along with the change of the exhaust flow, the air flow rate discharged into the silencing chamber 1 through the exhaust port 201 of the air inlet pipe 2 is stabilized, and the silencing material can fully absorb and convert the sound energy.
Example 3:
referring to fig. 2, 3 and 11, in addition to embodiment 2, the airflow silencer for an engine further includes a rotating shaft 7 rotatably disposed on the air inlet pipe 2, a toggle piece 701 is disposed on the rotating shaft 7, one end of the rotating shaft 7, which is far away from the toggle piece 701, penetrates through the air inlet pipe 2 and is connected to a rotating disc 8, and fan blades 801 uniformly distributed circumferentially are disposed on the rotating disc 8.
Specifically, the waste gas that emits into in the intake pipe 2 makes stir piece 701 drive axis of rotation 7 and rotates to stir piece 701 effort, and then makes axis of rotation 7 drive flabellum 801 rotatory through rolling disc 8, and to intake pipe 2 heat dissipation of blowing, the temperature that reduces intake pipe 2 and rise because of carrying hot waste gas often, the muffler obtains the cooling, and then reduces engine complete machine temperature, improves the life of muffler and engine.
Example 4:
referring to fig. 10, in addition to embodiment 3, the airflow silencer for an engine further includes an air deflector 9 fixed on the air inlet pipe 2, and a plurality of air guide grooves 901 matched with the paddles 701 are formed in the air deflector 9 in an inclined manner.
Specifically, when the exhaust gas entering the air inlet pipe 2 passes through the air deflector 9, the inclined air guide groove 901 can guide the direction of the air flow, so as to drive the acoustic energy conversion mechanism to operate.
Example 5:
referring to fig. 2, 3, 6 and 7, in embodiment 3, the friction force adjusting assembly further includes a second elastic telescopic rod 10 fixed on the rack plate 603, one end of the second elastic telescopic rod 10 away from the rack plate 603 is provided with a curved friction plate 1001, and the curved friction plate 1001 is movably abutted to the rotating shaft 7.
Specifically, when the exhaust flow of the engine is too large, the adjusting mechanism drives the rack plate 603 to displace and pull the piston 202 to move in the intake pipe 2 through the first pull rope 604, thereby changing the flow area of the exhaust port 201, in the process, the rack plate 603 extrudes the second elastic telescopic rod 10, so that the second elastic telescopic rod 10 is compressed, the reaction force of the second elastic telescopic rod 10 is applied to the curved friction plate 1001, the friction force between the curved friction plate 1001 and the rotating shaft 7 is increased, the rotating speed of the rotating shaft 7 is reduced, and the phenomenon that the rotating speed of the rotating shaft 7 is too high when the exhaust flow of the engine is too large is avoided, so that the fan blades 801 rotate too fast to generate airflow regenerative noise, and the silencing effect of the silencer is ensured.
Example 6:
referring to fig. 2, 3, 4, 6, 7, 8 and 9, in addition to embodiment 3, further, a second rotating shaft 11 is further rotatably disposed in the air inlet pipe 2, a second baffle 111 is disposed on the second rotating shaft 11, a third elastic telescopic rod 113 is movably disposed between the second baffle 111 and the air inlet pipe 2, one end of the second rotating shaft 11, which is far away from the second baffle 111, penetrates through the air inlet pipe 2 and is provided with a worm 112, a second support plate 204 is fixedly connected to the air inlet pipe 2, a second rotating rod 12 is disposed on the second support plate 204, a worm wheel 121 engaged with the worm 112 is disposed on the second rotating rod 12, a wind-up roller 122 is further disposed on the second rotating rod 12, a second pull rope 123 is wound and connected to the wind-up roller 122, one end of the second pull rope 123, which is far away from the wind-up roller 122, is connected to a movable plate 13 for blocking the air guide slot 901, the movable plate 13 is slidably disposed in the air inlet pipe 2 and is slidably disposed in cooperation with the air guide plate 9, and a second elastic element 131 is disposed between the movable plate 13 and the air inlet pipe 2.
Specifically, when the exhaust flow of the engine is small, the thrust of the exhaust gas on the second baffle 111 is small, so that the third elastic telescopic rod 113 pushes the second baffle 111 to deflect downwards around the second rotating shaft 11 as a circle center, so that the second rotating shaft 11 drives the worm 112 to engage with the worm wheel 121 on the second rotating rod 12, so that the second rotating rod 12 drives the wind-up roller 122 to rotate to wind the second pull rope 123, so that the movable plate 13 moves towards the center of the air inlet pipe 2, the movable plate 13 blocks part of the air guiding grooves 901 on the air guiding plate 9, so that the exhaust gas in the air inlet pipe 2 passes through the air guiding grooves 901 which are not blocked, the air flow area is reduced, the air flow speed is increased, a larger thrust is generated on the moving plate 701 before, the rotating shaft 7 can rotate faster, the heat dissipation work of the fan blades 801 on the air inlet pipe 2 is ensured, and the cooling work of the air inlet pipe 2 is prevented from being influenced by too slow rotating speed; it should be noted that, after the movable plate 13 plugs part of the air guiding groove 901, the air flow velocity is accelerated after passing through the air guiding plate 9, and after acting force is applied to the moving plate 701, the flow area in the air inlet pipe 2 is increased, so that the air flow velocity of the exhaust gas passing through the moving plate 701 is slowed down again, and the first baffle 501 is not pushed, and only when the exhaust flow of the engine is too large, the air flow velocity entering the air inlet pipe 2 is always too fast to generate thrust on the first baffle 501, so that the adjusting mechanism is actuated to adjust the position of the piston 202, and the flow area of the air inlet pipe 2 is changed.
Example 7:
referring to fig. 6 and 9, in addition to embodiment 6, the intake pipe 2 is further provided with two side plates 14, a guide rod 141 is disposed between the two side plates 14, and the second cord 123 is slidably disposed on the guide rod 141.
Specifically, the guide rod 141 is provided to guide the moving direction of the second cord 123, thereby facilitating the control of the moving direction of the movable plate 13.
Example 8:
referring to fig. 2, in addition to embodiment 1, a sound insulating layer 15 is provided in a sound insulating chamber of a sound insulating chamber 1, and the sound insulating layer 15 is made of sound insulating cotton.
Specifically, through set up the amortization cotton in amortization room 1, when the noise air current was at impact amortization cotton, turn into internal energy with acoustic energy, make the cotton friction heat energy of amortization produce, effective noise reduction.
Example 9:
referring to fig. 1 and 2, in addition to embodiment 8, an air flow silencer for an engine further includes an air inlet end of an air outlet pipe 3 disposed inside a silencing chamber 1, an air outlet end of the air outlet pipe 3 disposed outside the silencing chamber 1, and an air outlet end of the air outlet pipe 3 formed in a horn shape.
Specifically, the exhaust end of the outlet pipe 3 is arranged to be horn-shaped, so that waste gas can further expand and reduce pressure of air flow in the exhaust process, and noise is effectively reduced.
The invention also discloses a working method of the airflow silencer for the engine, which comprises the following steps:
s1: waste gas generated by an engine is conveyed through an air inlet pipe 2 and enters a silencing chamber 1 through an air outlet 201, aerodynamic noise is silenced, and air flow after silencing is discharged out of the silencing chamber 1 through an air outlet pipe 3;
s2: when the engine displacement is large, the exhaust gas entering the air inlet pipe 2 pushes the first baffle 501, so that the first baffle 501 turns upwards around the first rotating shaft 5, and in the turning process, the adjusting mechanism adjusts the position of the piston 202 in the air inlet pipe 2, so that the number of the exhaust ports 201 of the piston 202 moving to the right is increased, and the gas flow area is increased; when the exhaust pressure is reduced, the piston 202 is reset to move left to reduce the flow area, so that the flow area is changed along with the change of the exhaust flow, and the air flow rate discharged into the anechoic chamber 1 through the exhaust port 201 of the air inlet pipe 2 is stabilized;
s3: when the engine displacement is increased, the exhaust gas entering the air inlet pipe 2 is guided by the air deflector 9 to drive the sound energy conversion mechanism to act, so that the rotating shaft 7 drives the fan blades 801 to blow and dissipate heat of the air inlet pipe 2, the temperature of the silencer is reduced, the air sound energy is converted into mechanical energy for driving the rotating shaft 7 to rotate, the noise energy is reduced, the friction force adjusting assembly arranged between the adjusting mechanism and the sound energy conversion mechanism works, the friction force between the curved surface friction plate 1001 and the rotating shaft 7 is increased, and the rotating speed of the rotating shaft 7 is reduced;
s4: when the engine displacement is small, the thrust of the exhaust gas to the second baffle 111 is small, so that the third elastic expansion link 113 pushes the second baffle 111 to deflect downwards by taking the second rotating shaft 11 as a center of circle, the second rotating shaft 11 drives the worm 112 to be meshed with the worm wheel 121 on the second rotating rod 12, so that the second rotating rod 12 drives the winding roller 122 to rotate to wind the second pull rope 123, so that the movable plate 13 moves to the center of the air inlet pipe 2, the movable plate 13 plugs part of the air guide grooves 901 on the air guide plate 9, so that the exhaust gas in the air inlet pipe 2 passes through the air guide grooves 901 which are not plugged, the air flow speed is accelerated, the pushing force is generated on the poking piece 701, the rotating shaft 7 is enabled to operate at a relatively uniform speed, and the air inlet pipe 2 is cooled.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. An airflow silencer for an engine comprises a silencing chamber (1) and is characterized in that an air inlet pipe (2) and an air outlet pipe (3) are connected to two sides of the silencing chamber (1) respectively, air outlets (201) which are uniformly distributed are formed in the air inlet pipe (2), the air inlet pipe (2) is communicated with the silencing chamber (1) through the air outlets (201), a piston (202) is arranged in the air inlet pipe (2) in a sliding mode, an adjusting mechanism used for driving the piston (202) to move is arranged on the air inlet pipe (2), a shell (4) is sleeved on the outer side of the air inlet pipe (2), the shell (4) is connected with the silencing chamber (1), an acoustic energy conversion mechanism used for cooling is arranged on the air inlet pipe (2), and a friction force adjusting assembly is arranged between the acoustic energy conversion mechanism and the adjusting mechanism;
the adjusting mechanism comprises a first rotating shaft (5) rotatably arranged on an air inlet pipe (2), a first baffle (501) is arranged on the outer side of the first rotating shaft (5), a first elastic telescopic rod (502) is movably arranged between the first baffle (501) and the inner wall of the air inlet pipe (2), one end, far away from the first baffle (501), of the first rotating shaft (5) penetrates through the air inlet pipe (2) and is connected with a large gear (503), a first supporting plate (203) is fixedly connected to the air inlet pipe (2), a first rotating rod (6) is arranged on the first supporting plate (203), a pinion (601) meshed with the large gear (503) is arranged on the first rotating rod (6), a driven wheel (602) is arranged on the first rotating rod (6), a rack plate (603) meshed and connected with the driven wheel (602) is arranged on the air inlet pipe (2) in a sliding mode, a first pull rope (604) is arranged between the rack plate (603) and the piston (202), and a first elastic element (2021) is arranged between the piston (202) and the inner wall of the anechoic chamber (1);
the acoustic energy conversion mechanism comprises a rotating shaft (7) which is rotatably arranged on the air inlet pipe (2), a stirring sheet (701) is arranged on the rotating shaft (7), one end, far away from the stirring sheet (701), of the rotating shaft (7) penetrates through the air inlet pipe (2) and is connected with a rotating disc (8), and fan blades (801) which are uniformly distributed in the circumferential direction are arranged on the rotating disc (8);
the acoustic energy conversion mechanism also comprises an air deflector (9) fixedly arranged on the air inlet pipe (2), and a plurality of air guide grooves (901) matched with the poking sheets (701) are obliquely formed in the air deflector (9);
the friction adjusting assembly comprises a second elastic telescopic rod (10) fixedly arranged on a rack plate (603), a curved surface friction plate (1001) is arranged at one end, far away from the rack plate (603), of the second elastic telescopic rod (10), and the curved surface friction plate (1001) is movably abutted to the rotating shaft (7).
2. The airflow silencer for the engine according to claim 1, wherein a second rotating shaft (11) is further rotatably arranged in the intake pipe (2), a second baffle (111) is arranged on the second rotating shaft (11), a third elastic telescopic rod (113) is movably arranged between the second baffle (111) and the intake pipe (2), one end, away from the second baffle (111), of the second rotating shaft (11) penetrates through the intake pipe (2) and is provided with a worm (112), a second support plate (204) is fixedly connected to the intake pipe (2), a second rotating rod (12) is arranged on the second support plate (204), a worm wheel (121) meshed and connected with the worm (112) is arranged on the second rotating rod (12), a winding roller (122) is further arranged on the second rotating rod (12), a second pull rope (123) is wound and connected to the winding roller (122), one end, away from the winding roller (122), of the second pull rope (123) is connected to a movable plate (13) for plugging an air guide groove (901), the movable plate (13) is slidably arranged in the movable plate (2), and a second elastic component (131) is slidably arranged between the movable plate (2) and the intake pipe (2).
3. The gas flow silencer for the engine according to claim 2, wherein two side plates (14) are further arranged on the air inlet pipe (2), a guide rod (141) is arranged between the two side plates (14), and the second pull rope (123) is slidably arranged on the guide rod (141).
4. A gas flow silencer for an engine according to claim 1, characterized in that a sound-insulating layer (15) is arranged in the silencing chamber of the silencing chamber (1), said sound-insulating layer (15) being arranged as silencing cotton.
5. The gas flow silencer for engine according to claim 4, characterized in that the inlet end of the outlet pipe (3) is arranged in the silencing chamber (1), the outlet end of the outlet pipe (3) is arranged outside the silencing chamber (1), and the outlet end of the outlet pipe (3) is arranged in a trumpet shape.
6. A method of operating a gas flow silencer for an engine, comprising a gas flow silencer for an engine as claimed in any one of claims 1 to 5, characterised by the further steps of:
s1: waste gas generated by an engine is conveyed through an air inlet pipe (2) and enters a silencing chamber (1) through an air outlet (201), aerodynamic noise is silenced, and air flow after silencing is discharged out of the silencing chamber (1) through an air outlet pipe (3);
s2: when the engine displacement is large, the waste gas entering the air inlet pipe (2) pushes the first baffle plate (501), so that the first baffle plate (501) is turned upwards by taking the first rotating shaft (5) as a circle center, and in the turning process, the adjusting mechanism adjusts the position of the piston (202) in the air inlet pipe (2), so that the number of the right-moving exhaust ports (201) of the piston (202) is increased, and the gas overflowing area is increased; when the exhaust pressure is reduced, the piston (202) is reset to move left to reduce the flow area, so that the flow area is changed along with the change of the exhaust flow, and the air flow rate discharged into the anechoic chamber (1) through the exhaust port (201) of the air inlet pipe (2) is stabilized;
s3: when the engine displacement is increased, the exhaust gas entering the air inlet pipe (2) is guided by the air deflector (9) to drive the sound energy conversion mechanism to act, so that the rotating shaft (7) drives the fan blades (801) to blow and dissipate heat of the air inlet pipe (2), the temperature of the silencer is reduced, the air sound energy is converted into mechanical energy for driving the rotating shaft (7) to rotate, the noise energy is reduced, the friction force adjusting assembly arranged between the adjusting mechanism and the sound energy conversion mechanism works, the friction force between the curved surface friction plate (1001) and the rotating shaft (7) is increased, and the rotating speed of the rotating shaft (7) is reduced;
s4: when the engine displacement is small, the thrust of the exhaust gas to the second baffle (111) is small, the third elastic telescopic rod (113) pushes the second baffle (111) to deflect downwards by taking the second rotating shaft (11) as a circle center, the second rotating shaft (11) drives the worm (112) to be meshed with the worm wheel (121) on the second rotating rod (12), the second rotating rod (12) drives the winding roller (122) to rotate to wind the second pull rope (123), the movable plate (13) moves towards the center of the air inlet pipe (2), the movable plate (13) seals part of the air guide grooves (901) on the air deflector (9), the exhaust gas in the air inlet pipe (2) passes through the air guide grooves (901) which are not sealed, the air flowing speed is accelerated, the pushing force is generated on the stirring sheet (701), the rotating shaft (7) is enabled to operate at a relatively uniform speed, and the air inlet pipe (2) is cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211699995.6A CN115653710B (en) | 2022-12-29 | 2022-12-29 | Airflow silencer for engine and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211699995.6A CN115653710B (en) | 2022-12-29 | 2022-12-29 | Airflow silencer for engine and working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115653710A CN115653710A (en) | 2023-01-31 |
| CN115653710B true CN115653710B (en) | 2023-03-28 |
Family
ID=85022425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211699995.6A Active CN115653710B (en) | 2022-12-29 | 2022-12-29 | Airflow silencer for engine and working method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115653710B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117646666B (en) * | 2024-01-29 | 2024-04-12 | 苏州国融前沿技术有限公司 | Air flow noise reduction silencer for motor equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733891A (en) * | 2011-04-11 | 2012-10-17 | 天津市七星精密机械有限公司 | Exhaust silencer of damping type engine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2811015B1 (en) * | 2000-06-30 | 2003-02-21 | Ecia Equip Composants Ind Auto | EXHAUST VOLUME AND EXHAUST DEVICE COMPRISING SAME |
| JP2009062972A (en) * | 2007-06-06 | 2009-03-26 | Calsonic Kansei Corp | Silencer |
| CN101813017B (en) * | 2010-04-20 | 2012-09-26 | 重庆大学 | Exhaust muffler capable of automatically adjusting overflow area |
| CN104863681A (en) * | 2015-04-13 | 2015-08-26 | 成都陵川特种工业有限责任公司 | Exhaust pipe silencing method |
| CN206860964U (en) * | 2017-06-19 | 2018-01-09 | 上海天纳克排气***有限公司 | Air bleeding valve |
| CN108412581B (en) * | 2018-04-23 | 2023-10-13 | 吉林大学 | Variable-volume straight-through impedance composite muffler and control method thereof |
| CN114382580B (en) * | 2021-12-15 | 2023-03-21 | 北京电子工程总体研究所 | Vehicle silencer exhaust apparatus |
| CN216974998U (en) * | 2022-02-10 | 2022-07-15 | 无锡威孚力达催化净化器有限责任公司 | Silencer with exhaust tuning valve |
-
2022
- 2022-12-29 CN CN202211699995.6A patent/CN115653710B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733891A (en) * | 2011-04-11 | 2012-10-17 | 天津市七星精密机械有限公司 | Exhaust silencer of damping type engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115653710A (en) | 2023-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115653710B (en) | Airflow silencer for engine and working method | |
| KR20010046909A (en) | propeller apparatus | |
| CN101476828B (en) | Helical silencing heat exchanger | |
| CN113022863A (en) | Auxiliary power device and exhaust control method for auxiliary power device | |
| CN114776614A (en) | Fan and cleaning equipment | |
| CN114025540A (en) | Cooling device of big data information processing equipment and using method thereof | |
| CN201322563Y (en) | Spiral-muffling heat exchanger | |
| CN218442778U (en) | Pneumatic pressure boost themogenesis air heater | |
| CN115234498B (en) | Bispin formula air exhaust equipment of making an uproar that falls | |
| CN212930128U (en) | Smoke machine with adjustable air curtain | |
| CN114592951A (en) | Engine tail gas treatment system and method | |
| CN114187887A (en) | Novel combined type silencer | |
| CN109779741B (en) | Automobile-used turbo charger | |
| CN219993833U (en) | Inside exhaust device to outside of tower section of thick bamboo | |
| CN219197452U (en) | Efficient heat dissipation device of generator set | |
| CN117967438B (en) | Plastic fan cover of automobile engine | |
| CN219317027U (en) | Impedance composite muffler | |
| CN117846744B (en) | Noise reduction equipment for engine exhaust | |
| CN213512002U (en) | Speed reducer convenient for noise reduction and heat dissipation | |
| CN216199146U (en) | Air duct structure of centrifugal fan | |
| CN217421335U (en) | High-efficient intelligent gas generating set | |
| CN210977691U (en) | Generator set shell with good silencing effect | |
| CN215672763U (en) | Single-stage high-speed centrifugal blower provided with adjustable diffuser | |
| CN219711871U (en) | Industrial fan shell capable of reducing noise | |
| CN220268029U (en) | Low-noise centrifugal heat dissipation fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |