CN217481369U

CN217481369U - Reactive muffler and ship

Info

Publication number: CN217481369U
Application number: CN202220253553.8U
Authority: CN
Inventors: 闫超群; 陈永辉; 童宗鹏; 朱晓健; 姜小荧
Original assignee: 711th Research Institute of CSIC
Current assignee: 711th Research Institute of CSIC
Priority date: 2022-02-07
Filing date: 2022-02-07
Publication date: 2022-09-23
Anticipated expiration: 2032-02-07

Abstract

The application provides a reactive muffler and a ship, wherein the reactive muffler comprises a shell, a muffling pipeline, a first partition plate, a micro-perforated pipe, a first conduit and a first spraying part, wherein the muffling pipeline penetrates into the shell along the axial direction of the muffling pipeline, and the outer wall of the muffling pipeline and the inner wall of the shell form a cooling cavity; the silencing pipeline comprises an air inlet pipe and an air outlet pipe; the first partition plate is arranged in the silencing pipeline and divides the interior of the silencing pipeline into a primary silencing cavity and a secondary silencing cavity; the air inlet pipe is communicated with the primary silencing cavity, and the air outlet pipe is communicated with the secondary silencing cavity; the micro-perforated pipe is arranged in the secondary silencing cavity along the axial direction of the micro-perforated pipe, and one end of the micro-perforated pipe is connected to the first partition plate; the micro-perforated pipe is provided with micro-holes; the first guide pipe is arranged in the primary silencing cavity and comprises an outer wall and an inner wall, a gap is formed between the outer wall and the inner wall, and the gap is communicated with the air inlet pipe; the cross-sectional area of the first conduit increases in a direction away from the inlet conduit; the first spraying part extends into the primary silencing cavity, so that noise and infrared radiation are suppressed simultaneously.

Description

Reactive muffler and ship

Technical Field

The application relates to the technical field of noise elimination, in particular to a reactive muffler and a ship.

Background

The turbocharged diesel engine is one of main motive power devices of a ship, and meanwhile, the exhaust noise and high-temperature exhaust of the turbocharged diesel engine are also one of main noise sources and infrared radiation signals of related ships. With the development of science and technology, the concealment requirements of the ship nowadays are not only to reduce the noise radiation, but also to reduce the high-temperature infrared radiation of the ship.

In order to continuously improve the comprehensive concealment of a ship, it is necessary to suppress high noise and high temperature exhaust gas of a diesel engine. At present, an exhaust cooling muffler device is installed in an exhaust system of a marine diesel engine and used for controlling exhaust noise with low full-frequency characteristics, and cooling modes adopted by the exhaust cooling muffler device comprise a cooling water jacket heat conduction heat exchange mode and a direct water spray cooling mode.

One of the existing exhaust gas cooling noise elimination technologies is to adopt a composite noise elimination structure for achieving a better noise elimination effect, and the sound absorption performance of a material can be rapidly reduced due to water absorption of a sound absorption material, so that the structure basically adopts a heat conduction mode to carry out cooling heat exchange to reduce high-temperature exhaust, and finally the exhaust cooling effect is poor, and the higher infrared suppression requirement of modern ships cannot be met. The other method is to adopt a water spray cooling method for achieving a better cooling effect, on one hand, the existing structure can not fully mix hot exhaust gas and water mist in the whole cavity, so that the temperature of a local area is not sufficiently reduced, and on the other hand, because the water mist can be filled in the cavity, the water mist can only be muffled by adopting a pure resistance structure, so that the high-frequency muffling effect is not good, and the higher noise suppression requirement of the modern ship can not be met.

SUMMERY OF THE UTILITY MODEL

The application provides a reactive muffler and ship to when solving boats and ships and synthesizing stealthy, unable high-efficient noise suppression and infrared radiation's simultaneously technical problem.

The application provides a reactive muffler which comprises a shell, a muffling pipeline, a first partition plate, a micro-perforated pipe, a conical first guide pipe and a first spraying part, wherein the muffling pipeline penetrates into the shell along the axial direction of the muffling pipeline, and the outer wall of the muffling pipeline and the inner wall of the shell form a cooling cavity; the silencing pipeline comprises an air inlet pipe and an air outlet pipe, and one end of the air inlet pipe and one end of the air outlet pipe both extend out of the shell; the first partition plate is arranged in the silencing pipeline along the radial direction of the silencing pipeline, and the side wall of the first partition plate is connected to the inner wall of the silencing pipeline to divide the interior of the silencing pipeline into a primary silencing cavity and a secondary silencing cavity; the air inlet pipe is communicated to the primary silencing cavity, and the air outlet pipe is communicated to the secondary silencing cavity; the micro-perforated pipe is arranged in the secondary sound attenuation cavity along the axial direction of the micro-perforated pipe, and one end of the micro-perforated pipe is connected to the first partition plate; the micro-perforated pipe is provided with at least two micropores which are distributed along the axial direction and the circumferential direction of the micro-perforated pipe; the first guide pipe is arranged in the primary silencing cavity along the axial direction of the first guide pipe and comprises an outer wall and an inner wall, a gap exists between the outer wall and the inner wall, and the gap is communicated to the air inlet pipe; the cross-sectional area of the first conduit increases in a direction away from the inlet tube; the first spraying part extends into the primary silencing cavity to spray water.

Optionally, the reactive muffler further comprises a second partition plate, the second partition plate is arranged in the secondary muffling cavity along the radial direction of the muffling pipeline, and a side wall of the second partition plate is connected to the inner wall of the muffling pipeline to divide the secondary muffling cavity into a secondary muffling cavity and a tertiary muffling cavity; the micro-perforated pipe is arranged in the secondary silencing cavity, one end of the micro-perforated pipe is connected to the first partition plate, and the other end of the micro-perforated pipe is connected to the second partition plate and communicated to the tertiary silencing cavity.

Optionally, the reactive muffler further comprises at least one second conduit, the second conduit is connected to the second partition plate, one end of the second conduit is communicated to the secondary muffling cavity, and the other end of the second conduit is communicated to the tertiary muffling cavity; one end of the second conduit is a bent pipe section, and the bent pipe section is located in the tertiary sound attenuation cavity and is bent towards the axial direction far away from the micro-perforated pipe.

Optionally, when the reactive muffler includes more than two of said second conduits, said second conduits surround an axial circumferential array of said microperforated tubes.

Optionally, the reactive muffler further comprises a second spraying part, and the second spraying part extends into the third-stage muffling cavity to spray water.

Optionally, the reactive muffler further comprises an insert pipe connected to the first partition plate along an axial direction of the micro-perforated pipe, one end of the insert pipe being communicated to the secondary muffling chamber, and the other end thereof being communicated to the primary muffling chamber.

Optionally, the first conduit further includes two or more guide plates, the guide plates are disposed in the gap, and two side surfaces of the guide plates are respectively connected to the outer wall and the inner wall; each guide plate is arranged along the generatrix direction of the first guide pipe so as to separate the gaps; the guide plate comprises a first section and a second section, the first section extends from the center of the first conduit to the axial direction of the first conduit, and the second section extends from the end part of the first section along the generatrix direction of the first conduit; the length of first section is L, the pipe diameter of intake pipe is D, then L is D/2.

Optionally, the second section is curved; the first conduit comprises an air inlet end and an air outlet end, the air inlet end is communicated to the air inlet pipe, the cross-sectional area of the air inlet end is S1, the cross-sectional area of the air outlet end is S2, and S1 is S2/2.

Optionally, the reactive muffler further includes a third duct, the third duct penetrates through the second partition plate along the axial direction of the micro perforated pipe, one end of the third duct is a tapered end, the tapered end extends into and communicates with the tertiary muffling cavity, and the other end of the third duct communicates with the micro perforated pipe.

Optionally, when the reactive muffler comprises more than two of said second ducts, said second ducts are of the same length only at equal axial distances from said microperforated tube.

Optionally, the reactive muffler further comprises at least one water drainage port communicating to the interior of the muffling conduit.

Optionally, the reactive muffler further comprises a spiral plate, and the spiral plate is arranged in the cooling cavity along the axial direction of the muffling pipeline.

Optionally, a water inlet and a water outlet which are communicated with the cooling cavity are arranged on the shell; the water inlet and the air inlet pipe are positioned at the same end of the shell, and the water outlet and the air outlet pipe are positioned at the other opposite end of the shell.

Accordingly, the present application also provides a boat that includes a reactive muffler as described in any of the above.

The application provides a reactive muffler and a ship.A gas enters a conical first guide pipe through a gas inlet pipe and flows in the first guide pipe along a gap between an outer wall and an inner wall; because the cross section area of the first conduit is gradually increased along the direction far away from the air inlet pipe, and meanwhile, the contraction and expansion of the cross section area of the primary silencing cavity cause the reflection of sound waves, the silencing effect on the middle-frequency and low-frequency band noises is achieved. The side wall of the micro-perforated pipe is provided with a plurality of micropores, so that a resonance sound absorption structure with low sound quality and high sound resistance is formed, sound waves enter the micro-perforated pipe and are reflected back and forth in the cavity to realize noise elimination, the micro-perforated pipe reduces noise by using the friction loss of air in the micropores, and simultaneously the micro-perforated pipe is matched with the contraction and expansion of the cross section area of the secondary noise elimination cavity to effectively absorb high-frequency noise; make the reactive muffler of this application can absorb the noise of full frequency band to promote the noise elimination effect of full frequency band.

The cooling water enters the cooling cavity formed by the shell and the silencing pipeline, and can exchange heat with the high-temperature wall surfaces of the primary silencing cavity and the secondary silencing cavity, so that the temperature of the gas in the silencing pipeline is reduced. The width of the gap between the outer wall and the inner wall is smaller than the pipe diameter of the air inlet pipe, so that when high-temperature gas flows to the first conduit through the air inlet pipe, the gas flowing through the gap enters the noise elimination cavity and can form strong airflow disturbance. The first conduit is positioned at the air outlet end of the first conduit, so that when the gas enters the primary silencing cavity through the air outlet end, the gas forms a sharp cyclone vortex; this cyclone vortex mixes with the water smoke intensive mixing of first portion spun, can promote gaseous cooling effect.

The application provides a reactive muffler and ship, its beneficial effect of another improvement scheme:

cooled high-temperature exhaust enters the three-level muffling cavity through the second guide pipe and the third guide pipe, and due to the fact that the second guide pipe is different in length, vortex flow is formed on each cross section of the three-level muffling cavity in the axial direction, a three-dimensional multi-cyclone space is formed in the cavity, the hot exhaust and gasified water mist are fully mixed, water vapor in the three-level muffling cavity reaches a saturated state and is evenly distributed, and a temperature field in the cavity is relatively even and does not have local high temperature.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a reactive muffler provided herein;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is a perspective view of a reactive muffler as provided herein;

FIG. 4 is a schematic view of an air intake conduit and a first conduit provided herein;

FIG. 5 is a schematic view of a portion of the structure of a first catheter provided herein;

FIG. 6 is a schematic structural view of a second catheter provided herein;

FIG. 7 is a schematic view of a trap as provided herein.

Description of the reference numerals:

100. a housing; 200. a sound-deadening pipeline; 210. an air inlet pipe; 220. an air outlet pipe; 230. a primary anechoic chamber; 240. a secondary anechoic chamber; 250. a third-stage anechoic chamber; 260. a drain pipe; 261. a drain port; 300. a cooling chamber; 310. a water inlet; 320. a water outlet; 330. a spiral plate; 340. a first spraying part; 350. a second spraying part; 400. a microperforated tube; 410. micropores; 420. a first separator; 430. a second separator; 440. Inserting a tube; 500. a first conduit; 510. an outer wall; 520. an inner wall; 530. a gap; 540. a guide plate; 541. a first stage; 542. a second stage; 600. a second conduit; 610. bending the pipe section; 700. a third conduit; 710. a tapered end.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless otherwise specified, the use of directional terms such as "upper", "lower", "left" and "right" generally refer to upper, lower, left and right in the actual use or operation of the device, and specifically to the orientation of the drawing figures.

The present application provides a reactive muffler and a ship, which will be described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

Referring to fig. 1-7, the present application provides a reactive muffler, which is a muffler that the sound waves pass through the abrupt change of the pipe section or the bypass resonant cavity, etc., and the impedance is changed during the sound transmission process to generate the reflection and interference of the sound energy, so as to reduce the sound energy radiated from the muffler to achieve the purpose of muffling. The reactive muffler can be suitable for high temperature resistant, moisture resistant, great, the higher service environment of clean requirement of convection velocity, and the reactive muffler is applicable to the ship in this application, installs in turbocharged diesel engine specifically, reduces the turbine and increases the exhaust noise of diesel engine, reduces the high temperature infrared radiation of boats and ships simultaneously. However, the above-mentioned environment of use of the reactive muffler does not specifically limit the scope of the present application, and the reactive muffler of the present application may be applied to other apparatuses.

The reactive muffler includes a housing 100, a sound-deadening pipe 200, a first partition 420, a micro-perforated pipe 400, a first guide pipe 500, and a first shower portion 340, wherein the sound-deadening pipe 200 is inserted into the interior of the housing 100 along an axial direction thereof, and an outer wall 510 thereof forms a cooling chamber 300 with an inner wall 520 of the housing 100, and a central axis of the sound-deadening pipe 200 coincides with a central axis of the housing 100 in order to maintain assembly accuracy and use stability in the present application. The muffling pipeline 200 includes an inlet pipe 210 and an outlet pipe 220, and one end of the inlet pipe 210 and one end of the outlet pipe 220 both penetrate through the cooling cavity 300 and extend out of the housing 100, so that the upstream and downstream pipeline systems are communicated with the reactive muffler.

First partition plate 420 is disposed inside sound-deadening pipe 200 in the radial direction of sound-deadening pipe 200, and the side wall of first partition plate 420 is connected to the inner wall of sound-deadening pipe 200, so that the inside of sound-deadening pipe 200 is divided into primary sound-deadening chamber 230 and secondary sound-deadening chamber by first partition plate 420. The air inlet pipe 210 is connected to the primary muffling chamber 230, and the air outlet pipe 220 is connected to the secondary muffling chamber. Microperforated tube 400 is disposed within the secondary sound-deadening chamber along its axial direction, and has one end connected to first partition 420. The micro-perforated pipe 400 is provided with at least two micro-holes 410, and the micro-holes 410 are arranged along the axial direction and the circumferential direction of the micro-perforated pipe 400; the micropores 410 in this application are distributed throughout the sidewall of the microperforated tube 400.

The first guide pipe 500 has a tapered shape, and the first guide pipe 500 is disposed inside the primary muffling chamber 230 in the axial direction thereof. The first duct 500 includes an outer wall 510 and an inner wall 520, the outer wall 510 is disposed around the inside, and a gap 530 is formed between the outer wall 510 and the inner wall 520, the gap 530 is connected to the inlet pipe 210, so that the gas in the inlet pipe 210 flows to the inside of the primary muffling chamber 230 through the gap 530. The cross-sectional area of the first duct 500 gradually increases in a direction away from the intake duct 210.

The first spraying part 340 comprises a first nozzle, and the first nozzle of the first spraying part 340 extends into the primary silencing cavity 230; further, the other end of the first showerhead extends into the cooling chamber 300, so that the first spray part 340 is communicated to the cooling chamber 300. The cooling structure can be simplified by the first shower part 340 communicating with the cooling chamber 300.

The exhaust noise of the turbocharged diesel engine enters the tapered first conduit 500 through the air inlet pipe 210, the gas flows in the first conduit 500 along the gap 530 between the outer wall 510 and the inner wall 520, the cross-sectional area of the first conduit 500 is gradually increased along the direction far away from the air inlet pipe 210, and meanwhile, the contraction and expansion of the cross-sectional area of the primary muffling cavity 230 causes the reflection of sound waves, so that the muffling effect of the noise in the middle and low frequency bands is achieved. Because a plurality of micropores 410 have been seted up on the lateral wall of micro-perforated pipe 400 to form the resonance sound absorption structure of low sound quality, high sound resistance, the pipe wall thickness of micro-perforated pipe 400 is less than 1.0 millimeter in this application, and the aperture of micropore 410 is less than 1.0 millimeter, and the perforation rate is between 1 ~ 10%, and the air bed of certain thickness (5 ~ 20cm) is left to the rear portion. The sound wave in the first-level anechoic cavity 230 flows to the secondary anechoic cavity through the micro perforated pipe 400, and when the sound wave enters the interior of the micro perforated pipe 400, the noise is reduced by the friction loss of the air in the micro perforated pipe 400 through the micro perforated pipe 410, the smaller the aperture of the micro perforated pipe 410 is, the larger the acoustic resistance is, the lower the perforation rate can increase the width of a sound absorption frequency band, and meanwhile, the position of an absorption peak can be controlled by the deep cavity degree on the micro perforated pipe 400. When sound waves enter the micro-perforated pipe 400, high-frequency noise is effectively absorbed by the plurality of micro-holes 410 formed in the micro-perforated pipe 400 and the contraction and expansion of the cross-sectional area of the secondary muffling cavity.

The first guide pipe 500 and the primary muffling cavity 230 are matched to absorb the noise of the middle-low frequency band, and then the micro perforated pipe 400 and the secondary muffling cavity are matched to absorb the noise of the high frequency band, so that the reactive muffler can absorb the noise of the full frequency band, and the muffling effect of the full frequency band is improved.

The cooling water enters the cooling cavity 300 formed by the housing 100 and the muffling pipeline 200, and in the process of flowing in the cooling cavity 300, the cooling water can exchange heat with the high-temperature wall surfaces of the primary muffling cavity 230 and the secondary muffling cavity, so that the temperature of the gas in the muffling pipeline 200 is reduced. In addition, the first spraying part 340 extends into the first-stage muffling cavity 230 to spray water, and the first spraying part 340 is located obliquely above the air outlet end of the first conduit 500 in the present application. The cross-sectional area of the first conduit 500 gradually increases in a direction away from the intake pipe 210; meanwhile, the width of the gap 530 between the outer wall 510 and the inner wall 520 is smaller than the pipe diameter of the air inlet pipe 210, so that when high-temperature air flows to the first guide pipe 500 through the air inlet pipe 210, the air flowing through the gap 530 into the sound attenuation chamber may form airflow disturbance. In addition, the cross-sectional area of the first duct 500 at the gas outlet end is the largest, so that when the gas enters the primary muffling chamber 230 through the gas outlet end, the gas forms a sharp cyclonic vortex; at this time, the cyclonic vortex is sufficiently mixed with the water mist sprayed from the first spraying part 340, so that the cooling effect of the gas can be improved. Therefore, the cooling liquid in the cooling cavity 300 exchanges heat with the gas in the muffler pipe 200, and the gas in the muffler pipe 200 is cooled by spraying through the cooperation of the first pipe 500 and the first spraying part 340, so that the cooling effect of the gas can be comprehensively improved.

The first conduit 500 located inside the primary muffling chamber 230 has multiple functions, and on one hand, the first conduit 500 utilizes the gap 530 and the gradually changing cross-sectional area to achieve the muffling effect on the middle and low frequency band noise by cooperating with the primary muffling chamber 230. On the other hand, the first duct 500 forms a cyclonic vortex by using the gap 530 with a smaller width and a gradually increasing cross-sectional area, and then cooperates with the first spraying part 340 to spray-cool the gas.

Further, the reactive muffler further includes a second partition 430, the second partition 430 is disposed inside the secondary muffling chamber along the radial direction of the muffling pipeline 200, and a side wall of the second partition 430 is connected to an inner wall 520 of the muffling pipeline 200 to divide the secondary muffling chamber into a secondary muffling chamber 240 and a tertiary muffling chamber 250. The micro perforated pipe 400 is arranged inside the secondary muffling cavity 240, and one end of the micro perforated pipe 400 is connected to the first partition plate 420 and communicated to the secondary muffling cavity 240; the other end of the micro-perforated pipe 400 is connected to the second partition 430 and is communicated to the tertiary muffling chamber 250.

After the gas is high-frequency muffled through the matching of the micro perforated pipe 400 and the secondary muffling cavity 240, sound waves flow into the tertiary muffling cavity 250 through the micro perforated pipe 400. In the process that the sound waves flow into the three-stage muffling cavity 250, the sound waves are reflected due to the contraction and expansion of the cross-sectional area between the micro perforated pipe 400 and the three-stage muffling cavity 250, so that the noise of the medium-low frequency band is muffled again, and the muffling effect of the reactive muffler can be further improved.

Further, the reactive muffler further includes at least one second guide pipe 600, the second guide pipe 600 is inserted into the second partition 430, and one end of the second guide pipe 600 is communicated to the secondary muffling chamber 240, and the other end thereof is communicated to the tertiary muffling chamber 250. One end of second conduit 600 is a curved tube segment 610, and curved tube segment 610 is positioned within tertiary muffling chamber 250 and curves in an axial direction away from microperforated tube 400.

The second conduit 600 is used for communicating the secondary muffling cavity 240 with the tertiary muffling cavity 250, when the gas in the micro perforated pipe 400 flows into the tertiary muffling cavity 250 through the second conduit 600, the sound waves are emitted due to expansion and contraction of the pipe diameter because the pipe diameter of the second conduit 600 is smaller than the pipe diameter of the micro perforated pipe 400 and the inner diameter of the tertiary muffling cavity 250, and therefore the muffling effect of the medium-low frequency band is further improved by matching the second conduit 600 with the tertiary muffling cavity 250. Meanwhile, the second conduit 600 communicating the secondary muffling cavity 240 with the tertiary muffling cavity 250 can improve the passing frequency of the medium and low frequency bands, which is beneficial to controlling the pressure loss.

Further, the reactive muffler further includes a second spraying part 350 including a second nozzle, and the second spraying part 350 is extended into the third-stage muffling chamber 250 to spray water. Further, the other end of the second showerhead extends into the cooling chamber 300, so that the second spray part 350 communicates with the cooling chamber 300. With the second spray part 350 communicating with the cooling chamber 300, the cooling structure can be simplified. The second spraying part 350 is located obliquely above the air outlet end of the second conduit 600 in this application.

Since the pipe diameter of the second pipe 600 is smaller than the pipe diameter of the micro-perforated pipe 400 and the inner diameter of the tertiary muffling chamber 250, when the gas in the secondary muffling chamber 240 flows into the tertiary muffling chamber 250 through the second pipe 600, the gas flowing out of the gas outlet end of the second pipe 600 forms a cyclone vortex due to the reduction of the pipe diameter. Meanwhile, one end of the second conduit 600 is a curved pipe section 610, the curved pipe section 610 is located in the tertiary muffling chamber 250 and is curved in the axial direction away from the micro-perforated pipe 400, and the curved pipe section 610 can be used for guiding the gas to flow into the tertiary muffling chamber 250 more dispersedly, so that a conical air flow field is formed. At this time, the cyclonic vortex formed by the second duct 600 is sufficiently mixed with the water mist sprayed from the second spraying part 350, thereby enhancing the cooling effect of the air.

Further, when the reactive muffler of the present application includes more than two second guide pipes 600, the second guide pipes 600 surround the axial circumferential array of the microperforated tube 400. With the second conduits 600 arranged around the axial direction of the microperforated tube 400, the curved tube sections 610 of the second conduits 600 are uniformly directed toward the interior of the tertiary muffling chamber 250, so that the gas flowing out through the curved tube sections 610 forms a conical gas flow field, enhancing the cooling effect. Meanwhile, the working efficiency of the reactive muffler can be improved on the premise of keeping the cooling and muffling effects by communicating the secondary muffling cavity 240 and the tertiary muffling cavity 250 through the multiple groups of second conduits 600.

Further, the reactive muffler further includes a third guide pipe 700, the third guide pipe 700 being inserted through the second partition 430 in the axial direction of the microperforated pipe 400, and the second guide pipe 600 being disposed around the third guide pipe 700 due to the second guide pipe 600 being distributed around the axial direction of the microperforated pipe 400. One end of the third conduit 700 is a tapered end 710, the tapered end 710 extends into and communicates with the tertiary muffling chamber 250, while the other end of the third conduit 700 communicates with the microperforated tube 400.

When the gas flows through the third guide duct 700 having the tapered end 710, a certain vacuum is created at the tapered end 710 while the second guide duct 600, which is fitted around the outside of the third guide duct 700, forms a sharp cyclonic vortex. At this time, the cyclonic vortex may be more sufficiently mixed with the spray of the second spray part 350 to more sufficiently cool the gas. Utilize first pipe 500 and the cooperation of first portion 340 that sprays in this application, spray the cooling for the first time to gas, then utilize the cooperation of second pipe 600, third pipe 700 and second portion 350 that sprays, spray the cooling for the second time to gas to the cooling effect of reactive muffler has been promoted.

Further, when the reactive muffler includes more than two second guide pipes 600, the lengths of the second guide pipes 600 are the same only at the positions where the axial distances from the microperforated pipe 400 are the same, and the lengths of some of the second guide pipes 600 are different in this application. The use of a plurality of second conduits 600 of unequal lengths may improve the amount of noise reduction at different pass frequencies, while also improving the cyclonic vortex flow created by the plurality of second conduits 600. Meanwhile, cooled high-temperature exhaust enters the three-stage muffling cavity 250 through the second guide pipe 610 and the third guide pipe 710, due to the characteristic that the second guide pipe 610 is different in length, a vortex is formed on each cross section in the axial direction of the three-stage muffling cavity 250, a three-dimensional multi-cyclone space is formed in the cavity, the hot exhaust and gasified water mist are fully mixed, water vapor in the three-stage muffling cavity 250 reaches a saturated state and is uniformly distributed, and a temperature field in the cavity is relatively uniform without local high temperature.

Further, the reactive muffler further includes an insertion pipe 440, the insertion pipe 440 penetrates the first partition 420 along the axial direction of the micro-perforated pipe 400, and one end of the insertion pipe 440 is communicated to the secondary muffling chamber 240, and the other end thereof is communicated to the primary muffling chamber 230. Since the pipe diameter of the insertion pipe 440 is smaller than the inner diameter of the primary muffling chamber 230 and the pipe diameter of the micro-perforated pipe 400, when the gas in the primary muffling chamber 230 flows into the interior of the micro-perforated pipe 400 through the insertion pipe 440, the sound waves are reflected and interfered, thereby absorbing the noise of the middle and low frequency bands. In addition, the insertion tube 440 can increase the passing frequency of the middle and low frequency bands.

Further, the first guide duct 500 further includes two or more guide plates 540, the guide plates 540 are disposed in the gap 530, and two side surfaces of the guide plates 540 are respectively connected to the outer wall 510 and the inner wall 520; each guide plate 540 is disposed along a generatrix direction of the first guide duct 500 to divide the gap 530 into a plurality of regions. The guide plate 540 includes a first section 541 and a second section 542, the first section 541 extends from the center of the first guide duct 500 perpendicularly to the axial direction thereof, and the second section 542 extends from the end of the first section 541 in the direction of the generatrix of the first guide duct 500; the length of the first section 541 is L, and the pipe diameter of the intake pipe 210 is D, so that L is D/2.

And a plurality of guide plates 540 disposed in the gap 530, wherein both sides of each guide plate 540 are respectively connected to the outer wall 510 and the inner wall 520 and are arranged along a generatrix direction of the first duct 500, so that the gap 530 can be divided into a plurality of relatively independent regions, and thus the region through which the gas flows is further tapered, so that a more acute cyclonic vortex can be formed at the gas outlet end of the first duct 500. Meanwhile, the gaps 530 are separated by the guide plates 540, so that the gas can flow into the primary silencing cavity 230 relatively uniformly, and the silencing and cooling effects are improved. In order to further reduce noise and improve cooling, the guide plates 540 are uniformly distributed at equal intervals.

When the air intake duct 210 is connected to the first guide duct 500, since the first section 541 extends perpendicularly to the axial direction thereof from the center of the first guide duct 500 and the length of the first section 541 is half of the pipe diameter of the air intake duct 210, the first section 541 is fitted to the inner wall 520 of the first guide duct 500. When the first duct 500 is provided with the plurality of guide plates 540, the plurality of first sections 541 are distributed around the center of the first duct 500, so that the gas flowing out through the gas inlet pipe 210 is dispersed into various regions using the plurality of first sections 541. Because the pipe diameter of the air inlet pipe 210 is greater than the width of the space, the pressure of the air entering the space surrounded by the first section 541 by the air inlet pipe 210 is relatively high, and the pressure of the air corresponding to the space surrounded by the first section 541 is basically consistent, so that the air flows into the first conduit 500 more uniformly.

Further, the second segment 542 is curved, and in this case, the second segment 542 is curved from its connection with the first segment 541 to its middle portion, and also curved from its middle portion to its end portions, and the curved directions are opposite. The second curved segment 542 can enhance the formation of vortex at the outlet end of the first conduit 500, thereby further improving the silencing and cooling effects.

Further, the first conduit 500 includes an inlet end and an outlet end, the inlet end is connected to the inlet pipe 210, the cross-sectional area of the inlet end is S1, and the cross-sectional area of the outlet end is S2, so that S1 is S2/2. By defining the ratio of the cross-sectional area of the inlet end of the first conduit 500 to the cross-sectional area of the outlet end, the formation of an enhanced vortex can be defined, while the area of the air flow field formed by the gas flowing to the primary muffling chamber 230 can be increased to further enhance the muffling and cooling effects.

Further, the reactive muffler further comprises at least one drain pipe 260, and the drain pipe 260 comprises a drain port 261 communicated to the inside of the muffling pipeline 200. In this application, the first-stage muffling cavity 230, the second-stage muffling cavity 240 and the third-stage muffling cavity 250 are all communicated with a drain port 261, so that condensed water generated in the first-stage muffling cavity 230, the second-stage muffling cavity 240 and the third-stage muffling cavity 250 can be drained. A drain valve is arranged at the specific drain port 261, and the drain valve is opened and closed to control the discharge of condensed water.

Further, the reactive muffler further includes a spiral plate 330, and the spiral plate 330 is disposed in the cooling chamber 300 along the axial direction of the muffling pipe 200. The spiral plate 330 disposed in the cooling chamber 300 may guide the flow of the cooling liquid, and at the same time, the cooling liquid may more uniformly perform a more sufficient heat exchange with the muffling pipeline 200 and the gas therein, thereby improving the heat exchange efficiency.

Further, a water inlet 310 and a water outlet 320 which are communicated with the cooling cavity 300 are arranged on the casing 100; the water inlet 310 is located at the same end of the housing 100 as the air inlet pipe 210, and the water outlet 320 is located at the opposite end of the housing 100 from the air outlet pipe 220. The cooling liquid is enabled to surround the gas in the cooling cavity 300 for heat exchange, and the initial cooling liquid is utilized to carry out heat exchange and spray cooling on the gas which just flows into the silencing pipeline 200, so that the cooling effect can be improved.

The present application provides a reactive muffler and a ship, and the detailed description is provided herein by using specific examples to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A reactive muffler, comprising:

a housing (100);

the silencing pipe (200) penetrates into the shell (100) along the axial direction of the silencing pipe, and the outer wall (510) of the silencing pipe and the inner wall (520) of the shell (100) form a cooling cavity (300); the silencing pipeline (200) comprises an air inlet pipe (210) and an air outlet pipe (220), and one end of the air inlet pipe (210) and one end of the air outlet pipe (220) both extend out of the shell (100);

a first partition plate (420) disposed inside the sound-deadening pipe (200) in a radial direction of the sound-deadening pipe (200), a side wall of the first partition plate (420) being connected to an inner wall (520) of the sound-deadening pipe (200) to partition an interior of the sound-deadening pipe (200) into a primary sound-deadening chamber (230) and a secondary sound-deadening chamber; the air inlet pipe (210) is communicated to the primary silencing cavity (230), and the air outlet pipe (220) is communicated to the secondary silencing cavity;

a microperforated tube (400) disposed axially within the secondary sound-damping chamber and having one end connected to the first baffle (420); the micro-perforated pipe (400) is provided with at least two micro-holes (410), and the micro-holes (410) are distributed along the axial direction and the circumferential direction of the micro-perforated pipe (400);

a first conical duct (500) arranged in the primary muffling chamber (230) along the axial direction thereof, the first conical duct comprising an outer wall (510) and an inner wall (520), a gap (530) being formed between the outer wall (510) and the inner wall (520), the gap (530) being communicated with the air inlet pipe (210); -the cross-sectional area of the first conduit (500) increases in a direction away from the air inlet pipe (210); and

and the first spraying part (340) extends into the primary silencing cavity (230) and sprays water.

2. The reactive muffler of claim 1, further comprising:

a second partition plate (430) arranged in the secondary muffling cavity along the radial direction of the muffling pipeline (200), wherein the side wall of the second partition plate (430) is connected to the inner wall (520) of the muffling pipeline (200) to divide the secondary muffling cavity into a secondary muffling cavity (240) and a tertiary muffling cavity (250);

the micro-perforated pipe (400) is arranged in the secondary silencing cavity (240), one end of the micro-perforated pipe (400) is connected to the first partition plate (420), and the other end of the micro-perforated pipe is connected to the second partition plate (430).

3. The reactive muffler of claim 2, further comprising:

at least one second conduit (600) connected to the second partition (430), one end of the second conduit (600) being communicated to the secondary muffling chamber (240) and the other end thereof being communicated to the tertiary muffling chamber (250);

one end of the second conduit (600) is a curved pipe segment (610), and the curved pipe segment (610) is positioned in the tertiary muffling cavity (250) and is bent towards the axial direction far away from the micro-perforated pipe (400).

4. Reactive muffler according to claim 3, characterized in that when a reactive muffler comprises more than two of said second ducts (600), said second ducts (600) surround an axial circumferential array of microperforated tubes (400).

5. The reactive muffler of claim 3, further comprising:

a second spray part (350) which extends into the three-stage muffling cavity (250) and sprays water; the second spray part (350) is communicated to the cooling cavity (300);

the first shower part (340) is communicated to the cooling chamber (300).

6. The reactive muffler of claim 2, further comprising:

an insert tube (440) connected to the first baffle (420) in an axial direction of the microperforated tube (400), one end of the insert tube (440) being communicated to the secondary muffling chamber (240), and the other end thereof being communicated to the primary muffling chamber (230).

7. The reactive muffler of claim 1, wherein the first conduit (500) further comprises:

two or more guide plates (540) disposed in the gap (530) and having both side surfaces connected to the outer wall (510) and the inner wall (520), respectively; each of the guide plates (540) is arranged along a generatrix direction of the first guide pipe (500) to partition the gap (530);

the guide plate (540) comprises a first section (541) and a second section (542), wherein the first section (541) extends from the center of the first guide pipe (500) to be perpendicular to the axial direction of the first guide pipe, and the second section (542) extends from the end part of the first section (541) along the generatrix direction of the first guide pipe (500); the length of the first section (541) is L, the pipe diameter of the air inlet pipe (210) is D, and L is D/2.

8. The reactive muffler of claim 7,

the second section (542) is curvilinear;

the first conduit (500) comprises an air inlet end and an air outlet end, the air inlet end is communicated to the air inlet pipe (210), the cross-sectional area of the air inlet end is S1, the cross-sectional area of the air outlet end is S2, and S1 is S2/2.

9. The reactive muffler of claim 2, further comprising:

and a third conduit (700) which penetrates the second partition plate (430) along the axial direction of the micro-perforated pipe (400), wherein one end of the third conduit (700) is a tapered end (710), the tapered end (710) extends into and is communicated with the tertiary muffling cavity (250), and the other end of the third conduit (700) is communicated with the micro-perforated pipe (400).

10. Reactive muffler, according to claim 3, characterized in that when it comprises more than two of said second ducts (600), the length of said second ducts (600) is the same only at equal axial distances from said microperforated tube (400).

11. The reactive muffler of claim 1, further comprising:

at least one drain port (261) communicating to the interior of the muffling conduit (200).

12. The reactive muffler of claim 1, further comprising:

a spiral plate (330) disposed within the cooling chamber (300) in an axial direction of the sound-deadening duct (200).

13. Reactive muffler, according to claim 1, characterized in that the shell (100) is provided with a water inlet (310) and a water outlet (320) communicating with the cooling chamber (300);

the water inlet (310) and the air inlet pipe (210) are positioned at the same end of the shell (100), and the water outlet (320) and the air outlet pipe (220) are positioned at the other opposite end of the shell (100).

14. A ship comprising a reactive muffler according to any one of claims 1 to 13.