CN112576338A - Spark extinguishing silencer for marine diesel engine - Google Patents

Spark extinguishing silencer for marine diesel engine Download PDF

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Publication number
CN112576338A
CN112576338A CN201910921667.8A CN201910921667A CN112576338A CN 112576338 A CN112576338 A CN 112576338A CN 201910921667 A CN201910921667 A CN 201910921667A CN 112576338 A CN112576338 A CN 112576338A
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CN
China
Prior art keywords
end cover
cylinder
plate
air inlet
cylinder body
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.)
Withdrawn
Application number
CN201910921667.8A
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Chinese (zh)
Inventor
梅冬生
季振林
肖友洪
严桂芳
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Jiangsu Yean Industry Environmental Protection Equipment Technology Co ltd
Original Assignee
Jiangsu Yean Industry Environmental Protection Equipment Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Yean Industry Environmental Protection Equipment Technology Co ltd filed Critical Jiangsu Yean Industry Environmental Protection Equipment Technology Co ltd
Priority to CN201910921667.8A priority Critical patent/CN112576338A/en
Publication of CN112576338A publication Critical patent/CN112576338A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/037—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of inertial or centrifugal separators, e.g. of cyclone type, optionally combined or associated with agglomerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/06—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for extinguishing sparks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/02—Resonance and interference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/04—Throttling-expansion and resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2210/00—Combination of methods of silencing
    • F01N2210/06—Throttling-expansion and interference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/06—Spark arresters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention discloses a spark extinguishing silencer of a marine diesel engine, wherein an air inlet end cover and an air outlet end cover are respectively fixed at two ends of an outer cylinder body, an air inlet pipe is arranged on the air inlet end cover in a penetrating manner, an air outlet pipe is arranged on the air outlet end cover in a penetrating manner, the air inlet end cover and the air outlet end cover are both of double-layer structures, sound absorbing materials are filled in the end covers, and inner wall plates of the end covers are all provided with pore plates; the extending end of the air inlet pipe is connected with a cyclone cylinder, the cyclone cylinder comprises a plurality of cyclone blades which are arranged at intervals along the circumferential direction, and the end surface of the cyclone cylinder is fixedly provided with a cyclone cylinder end plate; the middle sleeve is arranged at the central position of the outer cylinder body and supported in the cylinder of the outer cylinder body through a partition plate, the inner cylinder body is fixedly arranged in the cylinder of the middle sleeve, the core part of the inner cylinder body is filled with sound absorption materials, and the cylinder plate of the inner cylinder body is a perforated plate; and the outer cylinder body is provided with a dust collecting hopper. The silencer can realize broadband silencing, has small exhaust resistance and can quickly extinguish sparks.

Description

Spark extinguishing silencer for marine diesel engine
Technical Field
The invention relates to an engine exhaust muffler, in particular to a muffler which is used for reducing radiation noise of an exhaust pipe opening of a marine diesel engine and can extinguish sparks.
Background
The exhaust noise of the diesel engine is a main noise source of ships, and the diesel engine for the ships has the advantages of high output power efficiency, high exhaust temperature, high flow and wide exhaust noise frequency range. For a high-power marine diesel engine, the high-power marine diesel engine needs to have good broadband noise elimination performance, smooth exhaust must be ensured, and pressure loss is small. At present, the exhaust silencer of the marine internal combustion engine is an expansion silencer mainly used for eliminating medium and low frequency noise, and the exhaust silencer is often narrow in silencing frequency band, difficult to cover a noise frequency band with high sound wave, or easy to form large flow resistance and exhaust back pressure in an exhaust pipeline, and large in power loss of the internal combustion engine.
The diesel engine for ships has high power, high temperature of exhausted smoke, high flow rate and flow rate, and the frequency range of exhaust noise is 50 Hz-4000 Hz. Therefore, the silencer mounted on the silencer needs to meet the technical indexes of large main frequency noise elimination quantity, low airflow resistance, small structural size, light weight and the like. The silencer has good silencing and noise reducing performance, and also has the functions of effectively inhibiting and quickly extinguishing sparks in discharged smoke, collecting carbon particles in the smoke, reducing the surface temperature of a silencer shell and the like, so that the safety of a ship in sailing is ensured, and the surrounding environment is improved. However, none of the existing diesel mufflers can meet these requirements.
The existing ship silencer mainly has three main types: an anti-muffler, a resistive muffler and an impedance hybrid muffler. The reactive muffler mainly reduces the sound energy propagating downstream through reflection and interference of sound waves, and generally has good low-frequency attenuation performance. The resistive muffler absorbs sound energy through the built-in sound absorption material to reduce the downstream transmission, can effectively reduce medium-high frequency noise, but has poor low-frequency performance. The impedance composite muffler is the synthesis of the two structures, and the optimally designed impedance composite muffler has the muffling effects of low, medium and high frequencies.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide a spark extinguishing silencer of a marine diesel engine, which can realize broadband noise elimination and small exhaust resistance, can quickly extinguish sparks and collect carbon particles.
In order to solve the technical problem, the spark extinguishing silencer for the diesel engine of the ship comprises an outer cylinder body, wherein an air inlet end cover and an air outlet end cover are respectively fixed at two ends of the outer cylinder body, an air inlet pipe is arranged on the air inlet end cover in a penetrating manner, an air outlet pipe is arranged on the air outlet end cover in a penetrating manner, the cylinder wall of the outer cylinder body adopts a double-layer structure, sound absorption materials are filled in the cylinder wall, and a cylinder plate in the cylinder wall is a perforated plate; the air inlet end cover and the air outlet end cover are of a double-layer structure, sound absorption materials are filled in the end covers, and inner wall plates of the end covers are all provided with hole plates; the extending end of the air inlet pipe is connected with a cyclone cylinder, the cyclone cylinder comprises a plurality of cyclone blades which are arranged at intervals along the circumferential direction, and a cyclone cylinder end plate is fixedly arranged on the end surface of the cyclone cylinder; the middle sleeve is supported in the cylinder of the outer cylinder body through a partition plate, the middle sleeve is of a double-layer structure, sound absorption materials are filled in the middle sleeve, an inner cylinder plate of the middle sleeve is a perforated plate, partition plate protection plates are arranged on two sides of the partition plate, the partition plate protection plates are the perforated plates, and the sound absorption materials are filled between the partition plate and the partition plate protection plates; an inner cylinder body is fixedly arranged in the cylinder of the middle-layer sleeve, a core part of the inner cylinder body is filled with sound absorption materials, and a cylinder plate of the inner cylinder body is a perforated plate; and the outer cylinder is provided with an ash collecting hopper, and the position of the ash collecting hopper corresponds to the position of the rotational flow cylinder.
Furthermore, both ends of the inner cylinder body are respectively provided with an air inlet guide cone and an air outlet guide cone, and the inner cylinder body is fixedly arranged in the middle-layer sleeve through a support rod.
Furthermore, the perforation rate of the inner cylinder plate of the outer cylinder body is 25% -35%, and the perforation aperture is 4 mm-8 mm. The perforation rate of the inner wall plates of the air inlet end cover and the air outlet end cover is 25% -30%, and the perforation aperture is 4-6 mm.
Furthermore, the perforation rate of the cylinder plate of the inner cylinder body and the inner cylinder plate of the middle-layer sleeve is 25% -30%, and the aperture of the perforation is 4-8 mm.
Furthermore, the partition plate is positioned in the middle of the middle sleeve in the length direction, the perforation rate of the partition plate protective plate is 25% -30%, and the perforation aperture is 4-8 mm.
Further, the swirl vanes are arranged along the circumference of the swirl cylinder body in a tangential manner, and an air inlet channel is formed at the interval between every two adjacent swirl vanes.
Furthermore, the outer cylinder is provided with a dust collecting port which leads to a dust collecting hopper from the inner part of the outer cylinder.
Furthermore, the sound absorption material in the outer cylinder is rock wool or glass fiber, and a glass fiber cloth layer is arranged between the sound absorption material and the inner cylinder wall.
Furthermore, the sound absorption materials in the air inlet end cover and the air outlet end cover are rock wool or glass fiber, and a glass fiber cloth layer is arranged between the sound absorption materials and the inner wall plate of the end cover.
Furthermore, the overhanging end of the air inlet pipe is provided with an air inlet flange, and the overhanging end of the air outlet pipe is provided with an air outlet flange.
After the structure is adopted, the air inlet pipe and the air outlet pipe are respectively arranged on the air inlet end cover and the air outlet end cover in a run-through manner, so that an air inlet flow passage and an air outlet flow passage which are expanded and outstretched and contracted are formed, the sound waves are suddenly changed in the cross section of the expanded and contracted pipeline, so that the sound waves are suddenly changed in the acoustic impedance in the channel, the sound waves are changed in the transmission direction, and the reflection and interference are generated in the pipeline, thereby effectively realizing the noise elimination of the medium-frequency; the straight-through silencer structure has the advantages that the air inlet guide cone and the air outlet guide cone are fixedly arranged at the two ends of the inner cylinder respectively, and the straight-through silencer structure has smooth air flow and low flow resistance. The outer cylinder, the air inlet end cover and the air outlet end cover are all of a double-layer structure, the double-layer wall cavity is filled with sound absorbing materials, the wall plates facing the flow cavity are all provided with hole plates, the core part of the inner cylinder is also filled with the sound absorbing materials, the cylinder plates of the cylinder are provided with the hole plates, the hole plates and the sound absorbing material layers, the middle-layer sleeve is also of a double-layer structure, the sound absorbing materials are filled in the middle-layer sleeve, the inner cylinder plate of the middle-layer sleeve is provided with the hole plates, and the structures all form a resistive silencer which converts sound energy into heat energy by utilizing friction, viscosity and damping action to dissipate the heat energy, so that the silencer has good; the structure enables part of sound energy to be reflected back, and part of sound energy is transmitted into the resonant cavity to consume energy, and particularly when the optimized structure size enables the resonant frequency to be close to or equal to the sound wave frequency, resonance is generated, and the side branch resonant cavity absorbs and consumes a large amount of sound energy. Still owing to be connected with a whirl section of thick bamboo at the end of stretching into of intake pipe, and the tip at a whirl section of thick bamboo is fixed with whirl tube end board, the air current of leading-in through the intake pipe is under the effect of whirl section of thick bamboo whirl blade, the spark carbon particle that mix with in the air current is compelled to get rid of the inner wall of outside barrel along the tangential of a whirl section of thick bamboo, make spark and section of thick bamboo wall collision contact and extinguish fast, and the spark carbon particle that extinguishes slides along section of thick bamboo wall to a fire-collecting opening again, finally get into collection ash bucket, at the noise elimination in-process of air current, realize the quenching of spark and the cooling of carbon particle and collect, the silencer that has not only avoided the spark carbon particle to cause is clogged, the noise elimination stable performance has been guaranteed, and the emergence of the hidden danger. In the structure of the invention, through the optimized design of the structural parameters of the silencer, higher silencing quantity and wider silencing frequency can be realized, and the silencer has small airflow resistance, reasonable structure and convenient installation and maintenance. Therefore, the invention adopts an impedance composite noise elimination method, and realizes high-efficiency noise elimination within a wide frequency range (31.5-8000 Hz) by utilizing reasonable matching of expansion, resonance and loop sound absorption; the design of low flow resistance is realized by adopting cone diversion and a straight-through air passage; the spark extinguishing function is realized by adopting the cyclone cylinder and the cyclone blades, and the spark extinguishing silencer is formed.
Drawings
The spark extinguishing muffler for the diesel engine of the ship is further explained by combining the attached drawings and the detailed embodiment.
FIG. 1 is a schematic main sectional view of one embodiment of a spark quenching muffler for a marine diesel engine according to the present invention;
FIG. 2 is a left side view of the structure shown in FIG. 1;
FIG. 3 is an enlarged view of section A-A of the structure shown in FIG. 1;
in the figure, 1-air inlet pipe, 2-air inlet end cover, 3-outer cylinder, 4-cyclone cylinder, 5-cyclone cylinder end plate, 6-middle layer sleeve, 7-inner cylinder, 8-clapboard, 9-clapboard guard plate, 10-support rod, 11-air outlet end cover, 12-air outlet pipe, 13-air outlet guide cone, 14-air inlet guide cone, 15-ash collecting hopper, 16-ash collecting port, 17-cyclone blade, 18-mounting bracket.
Detailed Description
As shown in fig. 1 and 2, the outer cylinder 3 of the silencer is a circular tube structure, the outer cylinder 3 is a double-layer structure, the sound absorbing material is filled in the double-layer wall of the cylinder wall, the inner cylinder wall of the outer cylinder 3 is a perforated plate, a plurality of perforations are uniformly distributed on the perforated plate, the perforation rate is 30%, the perforation aperture (perforation diameter) is 5mm, and a glass fiber cloth layer formed by laying glass fiber cloth is arranged between the sound absorbing material and the inner cylinder wall. An air inlet end cover 2 and an air outlet end cover 11 are respectively fixed at two ends of the outer cylinder 3, the air inlet end cover 2 and the air outlet end cover 11 are both in an elliptical crown sealing head structure, and the outer cylinder 3, the air inlet end cover 2 and the air outlet end cover 11 form a silencer shell cavity. The air inlet end cover 2 and the air outlet end cover 11 both adopt a double-layer structure, sound absorption materials are filled in the end covers, the inner wall plate of each end cover is a perforated plate, and a glass fiber cloth layer is also arranged between the inner wall plate and the sound absorption materials; the inner wall plate had a piercing rate of 30% and a piercing hole diameter of 5 mm.
An air inlet pipe 1 is penetratingly arranged on the air inlet end cover 2, an air outlet pipe 12 is penetratingly arranged on the air outlet end cover 11, the air inlet pipe 1 and the air outlet pipe 12 are both circular cylindrical pipes, the air inlet pipe 1 and the air outlet pipe 12 are positioned on the same straight line, and the straight line is the central line of the outer cylinder 3.
The inlet end of the air inlet pipe 1 extending into the outer barrel is connected with a cyclone barrel 4, and a cyclone barrel end plate 5 is fixedly arranged at the end of the cyclone barrel 4 facing the inner part of the outer barrel. As shown in fig. 3, the cyclone cylinder 4 includes a plurality of cyclone blades 17 uniformly arranged at intervals along the circumferential direction of the cyclone cylinder; when the cyclone cylinder is manufactured, the cylinder wall of the cyclone cylinder is uniformly divided into a plurality of cylinder wall blades, and then the sheet cylinder wall blades are twisted for a certain angle to form the cyclone blades 17, so that each cyclone blade 17 is arranged along the circumferential tangent of the cyclone cylinder, and an air inlet channel is formed at the interval between two adjacent cyclone blades 17. The air flow entering from the air inlet pipe 1 is blocked by the cyclone cylinder end plate 5 and is forced to enter the cylinder cavity of the outer cylinder 3 from the air inlet channel between the cyclone blades 17, and the cyclone blades 17 are arranged along the tangential direction of the cylinder, so that the rotating air flow is formed, and the sparks and carbon particles mixed in the rotating air flow are thrown to the inner cylinder wall of the outer cylinder.
As shown in fig. 1, an ash collecting port 15 is arranged on the outer cylinder 3 corresponding to the position of the cyclone cylinder 4, and an ash collecting hopper 14 is arranged outside the ash collecting port 15; the thrown carbon particles slide along the inner wall of the outer cylinder 3 from the dust collecting port 15 to the dust collecting hopper 14.
The central point at outer barrel 3 puts and is provided with middle level sleeve 6, and middle level sleeve 6 passes through 8 supports in the section of thick bamboo of outer barrel 3 of baffle, and middle level sleeve 6 also adopts bilayer structure, and it has sound absorbing material to fill in middle level sleeve 5 is inside, and the interior tube sheet of middle level sleeve 5 is the foraminiferous plate, and this interior tube sheet is the perforated plate, and the perforation rate is 30%, and perforation aperture 5 mm. The middle sleeve 6 is supported in the cylinder of the outer cylinder 8 through a partition plate 8. The both sides of baffle 8 all are provided with baffle backplate 9, and baffle 8 is located the middle part position of 6 long directions on middle level sleeve, and baffle backplate 9 is the foraminiferous plate, and it has sound absorbing material to fill between baffle 8 and baffle backplate 9, and the perforation rate 25% -30% of baffle backplate 9, perforation aperture are 4 mm-8 mm. An inner cylinder body 7 is fixedly arranged in the cylinder of the middle-layer sleeve 6, a sound absorption material is filled in the core part of the inner cylinder body 7, the cylinder plate of the inner cylinder body 7 is a perforated plate, the perforation rate is 25% -30%, and the perforation aperture is 4-8 mm. An air inlet guide cone 14 and an air outlet guide cone 13 are respectively arranged at two ends of the inner cylinder body 7, and the inner cylinder body 7 is fixedly arranged in the middle-layer sleeve 6 through a support rod 10. An ash collecting hopper 15 is mounted on the outer cylinder 3, and the position of the ash collecting hopper 15 corresponds to the position of the cyclone cylinder 4.
The overhanging end of the air inlet pipe 1 is provided with an air inlet flange, and the overhanging end of the air outlet pipe 13 is provided with an air outlet flange. A pair of mounting brackets 8 are welded on the outer cylinder shell of the outer cylinder 3.
The foregoing has outlined some of the preferred embodiments of the present invention but the present invention is not limited thereto and modifications and variations may be made. For example, the sound absorption material can be rock wool or glass fiber, and can also be other common sound absorption materials; the perforation rate is preferably 25% to 30%, and the perforation diameter is preferably 4mm to 6 mm. Such variations and modifications are intended to fall within the scope of the present invention.

Claims (10)

1. The utility model provides a naval vessel diesel engine spark extinguishes silencer, includes outer barrel (3), is fixed with inlet end cover (2) and air outlet end cover (11) respectively at the both ends of outer barrel (3), is provided with intake pipe (1) with running through on inlet end cover (2), is provided with outlet duct (12) with running through on air outlet end cover (11), its characterized in that: the wall of the outer barrel (3) adopts a double-layer structure, sound absorption materials are filled in the wall of the outer barrel, and a barrel wall inner barrel plate is a perforated plate; the air inlet end cover (2) and the air outlet end cover (11) are both of a double-layer structure, sound absorption materials are filled in the end covers, and inner wall plates of the end covers are all perforated plates; the extending end of the air inlet pipe (1) is connected with a cyclone cylinder (4), the cyclone cylinder (4) comprises a plurality of cyclone blades (17) which are arranged at intervals along the circumferential direction, and a cyclone cylinder end plate (5) is fixedly arranged on the end surface of the cyclone cylinder (4); a middle-layer sleeve (6) is arranged at the center of the outer cylinder (3), the middle-layer sleeve (6) is supported in the cylinder of the outer cylinder (3) through a partition plate (8), the middle-layer sleeve (6) is of a double-layer structure, sound-absorbing materials are filled in the middle-layer sleeve (6), an inner cylinder plate of the middle-layer sleeve (6) is a perforated plate, partition plate protection plates (9) are arranged on two sides of the partition plate (8), the partition plate protection plates (9) are perforated plates, and the sound-absorbing materials are filled between the partition plate (8) and the partition plate protection plates (9); an inner cylinder body (7) is fixedly arranged in the cylinder of the middle-layer sleeve (6), a core part of the inner cylinder body (7) is filled with sound absorption materials, and a cylinder plate of the inner cylinder body (7) is a perforated plate; an ash collecting hopper (15) is arranged on the outer cylinder body (3), and the position of the ash collecting hopper (15) corresponds to the position of the cyclone cylinder (4).
2. The marine diesel spark extinction muffler of claim 1, wherein: an air inlet guide cone (14) and an air outlet guide cone (13) are respectively arranged at two ends of the inner cylinder body (7), and the inner cylinder body (7) is fixedly arranged in the middle-layer sleeve (6) through a support rod (10).
3. The marine diesel spark extinction muffler of claim 1, wherein: the inner cylinder plate perforation rate of the outer cylinder body (3) is 25% -35%, the perforation aperture is 4 mm-8 mm, the inner wall plate perforation rate of the air inlet end cover (2) and the air outlet end cover (11) is 25% -30%, and the perforation aperture is 4 mm-6 mm.
4. The marine diesel spark extinction muffler of claim 1, wherein: the perforation rate of the inner cylinder plate of the inner cylinder (7) and the inner cylinder plate of the middle-layer sleeve (6) is 25-30%, and the perforation aperture is 4-8 mm.
5. The marine diesel spark extinction muffler of claim 1, wherein: the baffle (8) is positioned in the middle of the middle sleeve (6) in the length direction, the perforation rate of the baffle guard plate (9) is 25% -30%, and the perforation aperture is 4-8 mm.
6. The marine diesel spark extinction muffler of claim 1, wherein: the swirl vanes (17) are arranged along the circumferential tangent of the cylinder body of the swirl cylinder (4) in general, and an air inlet channel is formed at the interval between two adjacent swirl vanes (17).
7. The marine diesel spark extinction muffler of claim 1, wherein: the outer cylinder body (3) is provided with a dust collecting port (16), and the dust collecting port (16) leads to a dust collecting hopper (15) from the interior of the outer cylinder body (3).
8. The marine diesel spark extinction muffler of claim 1, wherein: the sound absorption material in the outer cylinder body (3) is rock wool or glass fiber, and a glass fiber cloth layer is arranged between the sound absorption material and the inner cylinder wall.
9. The marine diesel spark extinction muffler of claim 1, wherein: the sound absorption materials in the air inlet end cover (2) and the air outlet end cover (11) are rock wool or glass fiber, and a glass fiber cloth layer is arranged between the sound absorption materials and the inner wall plate of the end cover.
10. The marine diesel spark extinction muffler of claim 1, wherein: the air inlet pipe is characterized in that an air inlet flange is arranged at the extending end of the air inlet pipe (1), and an air outlet flange is arranged at the extending end of the air outlet pipe (13).
CN201910921667.8A 2019-09-27 2019-09-27 Spark extinguishing silencer for marine diesel engine Withdrawn CN112576338A (en)

Priority Applications (1)

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CN201910921667.8A CN112576338A (en) 2019-09-27 2019-09-27 Spark extinguishing silencer for marine diesel engine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135364A (en) * 2021-12-07 2022-03-04 杭叉集团股份有限公司 Three-channel parallel double-resonant-cavity exhaust muffler for industrial vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135364A (en) * 2021-12-07 2022-03-04 杭叉集团股份有限公司 Three-channel parallel double-resonant-cavity exhaust muffler for industrial vehicle
CN114135364B (en) * 2021-12-07 2023-09-15 杭叉集团股份有限公司 Three-channel parallel double-resonant-cavity industrial vehicle exhaust muffler

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