CN114718696A

CN114718696A - Exhaust silencing system of heavy vehicle

Info

Publication number: CN114718696A
Application number: CN202210643165.5A
Authority: CN
Inventors: 李亮; 于昊仟; 韩晓娟; 卢衷正; 杨丙旭; 王莹
Original assignee: Shenyang Aerosun Futai Expansion Joint Co ltd
Current assignee: Shenyang Aerosun Futai Expansion Joint Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-07-08
Anticipated expiration: 2042-06-09
Also published as: CN114718696B

Abstract

A heavy vehicle exhaust silencing system relates to the technical field of vehicles and comprises an engine system, wherein the engine system comprises an exhaust port, and the heavy vehicle exhaust silencing system comprises a condenser, a silencer and an exhaust pipe; the condenser comprises a condenser inlet and a condenser outlet, and the condenser inlet is communicated with the exhaust port; the silencer comprises a silencer inlet and a silencer outlet, and the silencer inlet is communicated with the condenser outlet; the exhaust pipe comprises an exhaust inlet and an exhaust outlet, the exhaust inlet is communicated with the muffler outlet, and the exhaust outlet is communicated with the outside of the vehicle; the condenser inlet is communicated with the exhaust port through the first corrugated pipe assembly, the condenser outlet is communicated with the silencer inlet through the second corrugated pipe assembly, and the silencer outlet is communicated with the exhaust pipe inlet through the third corrugated pipe assembly. The invention can cool the high-temperature flue gas through the condenser, and can reduce noise through the silencer, and has the advantages of simplified structure, lighter weight and good damping and silencing effects.

Description

Exhaust silencing system of heavy vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to an exhaust silencing system of a heavy vehicle.

Background

Heavy vehicles vibrate greatly and have high noise, and the noise sources of the heavy vehicles mainly comprise mechanical vibration, engine exhaust noise and the like. Since vibration noise between moving parts is difficult to reduce to some extent, noise reduction measures for heavy vehicles are generally directed to engine exhaust noise. For the exhaust noise control of the engine, on one hand, the working mode of the engine can be improved, and other new energy sources are used, on the other hand, the exhaust noise reduction can be performed through the exhaust pipe of the engine, and technically, the exhaust noise reduction of the exhaust pipe is the most direct and effective method.

At present, the exhaust pipe used by most heavy vehicles is complex in structure, large in size and heavy in weight, raw materials are wasted in the production and manufacturing process, smooth exhaust of the heavy vehicles is difficult to guarantee when the heavy vehicles run, accordingly, the power of the heavy vehicles is directly consumed, oil consumption is increased, fuel oil is wasted if the weight of the exhaust pipe is large, and the space in the vehicle is affected if the size of the exhaust pipe is large. Exhaust pipes for heavy vehicles also tend to experience increased noise as the engine speed increases, and conventional exhaust pipes are unable to meet the muffling requirements of such vehicles due to the high noise and vibration of heavy vehicles. In addition, the engine of the heavy vehicle has high power, the temperature of the smoke discharged from an engine system is high, and the high-temperature resistance and vibration reduction performance of the conventional exhaust pipe are general, so that the emission requirement of high-temperature smoke cannot be met.

Therefore, there is a need for an exhaust muffler system for heavy vehicles, which can solve the problems of complex structure, large volume, heavy weight, loud noise and general high temperature resistance of the exhaust pipe of the existing heavy vehicles.

Disclosure of Invention

The application mainly aims to provide a heavy vehicle exhaust silencing system to can solve the problems that an existing heavy vehicle exhaust pipe is complex in structure, large in size, overweight, high in noise and general in high temperature resistance.

In order to solve the technical problem, the present application provides a heavy vehicle exhaust silencing system, the heavy vehicle including an engine system, the engine system including an exhaust port, the heavy vehicle exhaust silencing system including a condenser, a silencer, and an exhaust pipe; wherein,

the condenser comprises a condenser inlet and a condenser outlet, and the condenser inlet is communicated with the exhaust port;

the silencer comprises a silencer inlet and a silencer outlet, and the silencer inlet is communicated with the condenser outlet;

the exhaust pipe includes an exhaust gas inlet and an exhaust gas outlet, the exhaust gas inlet communicating with the muffler outlet, the exhaust gas outlet communicating with the outside of the vehicle;

the condenser inlet is communicated with the exhaust port through a first corrugated pipe assembly, the condenser outlet is communicated with the muffler inlet through a second corrugated pipe assembly, and the muffler outlet is communicated with the exhaust pipe inlet through a third corrugated pipe assembly.

Preferably, the first bellows assembly, the second bellows assembly, and the third bellows assembly each include a bellows, a draft tube, a pair of bellows flanges, and a pair of seals, wherein,

the corrugated pipe flange is annular, the pair of corrugated pipe flanges are parallel to each other, a corrugated pipe installation groove and a guide cylinder installation groove are sequentially arranged on the opposite side surfaces of the pair of corrugated pipe flanges from outside to inside, the corrugated pipe installation groove and the guide cylinder installation groove are concentrically arranged with the corrugated pipe flange, the inner diameter of the guide cylinder installation groove is smaller than that of the corrugated pipe installation groove, and the inner diameter of the guide cylinder installation groove is larger than that of the corrugated pipe flange;

the two ends of the corrugated pipe are respectively inserted into the corrugated pipe mounting grooves of the pair of corrugated pipe flanges, and the end part of the corrugated pipe is fixed with the corrugated pipe mounting grooves in a welding manner;

the two ends of the guide cylinder are respectively inserted into the guide cylinder mounting grooves of the pair of corrugated pipe flanges, and the guide cylinder is axially and slidably inserted into the corrugated pipe;

the pair of sealing pieces are respectively arranged on the opposite side surfaces of the pair of corrugated pipe flanges.

Preferably, the inner peripheral wall of the guide cylinder is flush with the inner wall of the corrugated pipe flange, annular protrusions are respectively arranged on the outer walls of two ends of the guide cylinder, the annular protrusions are in sliding contact with the inner wall of the guide cylinder mounting groove, the contact end of each annular protrusion and the guide cylinder mounting groove is arc-shaped, and a gap is formed between the outer wall of the guide cylinder and the corrugated pipe;

the bellows flange at one end of the first bellows assembly is communicated with the exhaust port of the engine system through a quick connector.

Preferably, the condenser comprises a first end cover, a condenser pipe, a condenser shell, a plurality of condensing fins, a water inlet pipe, a water outlet pipe and a second end cover;

the first end cover is connected to one end of the condenser shell in a sealing mode, the second end cover is connected to the other end of the condenser shell in a sealing mode, and the first end cover and the second end cover are parallel to each other and perpendicular to the axial direction of the condenser shell;

the water inlet pipe is arranged at the top of the outer wall of the condenser shell and used for introducing condensed water into the condenser shell, the water outlet pipe is arranged at the bottom of the outer wall of the condenser shell and used for discharging the condensed water in the condenser shell;

the condenser pipe is inserted into the condenser shell, and the condenser pipe penetrates through the first end cover and the second end cover in a sealing mode respectively;

the plurality of condensing fins are arranged on the outer wall of the condensing pipe and positioned in the condenser shell, the plurality of condensing fins are uniformly distributed along the circumferential direction of the condensing pipe, and each condensing fin is provided with a plurality of condensing holes;

the two ends of the condensation pipe are respectively provided with a pair of condenser flanges, one end of the condensation pipe is provided with the condenser flanges and the other end of the first corrugated pipe assembly, the other end of the condensation pipe is provided with the condenser flanges and the other end of the second corrugated pipe assembly, and the corrugated pipe flanges are hermetically connected.

Preferably, the muffler includes a muffler shell, an inlet pipe, an outlet pipe, a first partition, a second partition, a plurality of muffler pipes, a first muffler flange, a second muffler flange, and an intermediate pipe;

the silencer is characterized in that a sound absorption material layer is attached to the inner wall of the silencer shell, a first mounting hole is formed in one end of the silencer shell, and a second mounting hole is formed in the other end of the silencer shell;

one end of the inlet pipe penetrates through the first mounting hole, the end of the inlet pipe is a bent pipe, and the other end of the inlet pipe forms the silencer inlet;

the first silencing flange is connected with the other end of the inlet pipe and is in sealing connection with the corrugated pipe flange positioned at the other end of the second corrugated pipe assembly;

one end of the outlet pipe penetrates through the second mounting hole, and the other end of the outlet pipe forms the silencer outlet;

the second noise reduction flange is connected with the other end of the outlet pipe, and the second noise reduction flange is hermetically connected with the corrugated pipe flange at one end of the third corrugated pipe assembly;

the first partition plate and the second partition plate are arranged in the silencer shell at intervals along the gas flowing direction, and a plurality of first silencing holes are uniformly distributed in the first partition plate and the second partition plate respectively;

a plurality of first through holes are formed in the first partition plate, and a plurality of second through holes are formed in the second partition plate;

one end of each silencing pipe is inserted into one first through hole, the other end of each silencing pipe penetrates through one second through hole, the axial directions of the silencing pipes are parallel to the axial direction of the silencer shell, and a plurality of second silencing holes are uniformly distributed in the pipe wall of each silencing pipe;

the middle pipe and the silencer shell are arranged concentrically, the middle pipe comprises a first straight pipe section, a conical pipe section and a second straight pipe section which are sequentially communicated, the first straight pipe section is inserted into one first through hole, the second straight pipe section is inserted into one second through hole, the conical pipe section is positioned between the first partition plate and the second partition plate, and the conical pipe section is close to the second partition plate;

and a plurality of third silencing holes are uniformly distributed on the pipe wall of the first straight pipe section and/or the pipe wall of the conical pipe section.

Preferably, the number of the silencing tubes is four, and the silencing tubes are respectively a first silencing tube, a second silencing tube, a third silencing tube and a fourth silencing tube;

the length of the first muffler pipe is 5/12 the length of the muffler shell;

the length of the second muffler pipe is 1/2 the length of the muffler shell;

the length of the third muffler pipe is 7/12 the length of the muffler shell;

the length of the fourth muffler pipe is 2/3 the length of the muffler shell.

Preferably, the muffler further comprises a tail muffler plate, the tail muffler plate is a hemispherical plate, the hemispherical plate comprises an arc-shaped end and an open end, a third mounting hole is formed in the middle of the arc-shaped end of the tail muffler plate, the one end of the outlet pipe penetrates through the second mounting hole and is connected to the third mounting hole, and the one end of the outlet pipe is connected with the third mounting hole through welding;

the open end of the tail silencing plate is connected with the side wall of the silencer shell through welding;

and a plurality of fourth silencing holes are uniformly distributed on the tail silencing plate.

Preferably, the joint of the outer wall of the first partition plate and the silencer shell, the joint of the outer wall of the second partition plate and the silencer shell, the first through hole of the first partition plate and the second through hole of the second partition plate are respectively provided with a flanging, the flanging is connected with the silencer shell through welding, and the length of the flanging is not less than 2 mm.

Preferably, the exhaust pipe comprises an exhaust flange and a tail pipe, the exhaust flange is sleeved at one end of the tail pipe, the exhaust flange is in sealing connection with the corrugated pipe flange at the other end of the third corrugated pipe assembly, and the other end of the tail pipe is bent towards the ground.

Preferably, the device further comprises at least one vibration damping device, wherein the vibration damping device is arranged on the condenser and/or the exhaust pipe;

the vibration damping device comprises a vibration damping shell, a plurality of mounting blocks and a plurality of spring vibration damping columns, wherein the vibration damping shell is cylindrical, the vibration damping shell is sleeved on the condenser or the exhaust pipe, the outer wall of the vibration damping shell is connected to a chassis of a vehicle, one end of each mounting block is connected to the inner wall of the vibration damping shell, the other end of each mounting block is arranged towards the axial direction of the vibration damping shell, and the mounting blocks are uniformly distributed along the circumferential direction of the vibration damping shell;

each mounting block is provided with a vibration damping mounting hole;

the spring vibration-damping columns comprise cylinder bodies, springs and plunger heads, and the cylinder body of each spring vibration-damping column is inserted into the vibration-damping mounting hole of one mounting block;

the spring is arranged in the cylinder body;

one end of the plunger head extends into the barrel body, the one end of the plunger head is connected to the spring, and the other end of the plunger head protrudes out of the barrel body;

the plunger heads of the spring damping columns are elastically abutted against the condenser or the exhaust pipe.

Compare in prior art, the heavy vehicle exhaust silencing system that this application provided has following beneficial effect at least: the condenser is used for cooling the high-temperature flue gas exhausted by the engine system, so that the service life of the exhaust silencing system is prolonged, meanwhile, the high temperature is prevented from being transmitted to the chassis, and components of the chassis of the vehicle are protected; the noise reduction treatment is carried out on the gas exhausted by the engine system through the silencer, so that the exhaust noise is reduced; the problems of excessive vibration and thermal compensation of the heavy vehicle in the running process can be effectively solved through the first bellows assembly, the second bellows assembly and the third bellows assembly. Compared with the prior art, the exhaust silencing system for the heavy vehicle has the advantages of simple structure, light weight and good vibration and silencing effects, and can cool high-temperature smoke through the condenser, so that the problems of complex structure, large volume, overweight, high noise and general high-temperature resistance of the exhaust pipe of the existing heavy vehicle are solved.

The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clear and clear, and to implement the technical solutions according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 illustrates a schematic structural diagram of a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 2 illustrates a schematic structural view of a bellows assembly in a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 3 illustrates an enlarged partial schematic view of an annular bulge in a bellows assembly of a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application, i.e., an enlarged schematic view at A in FIG. 2;

FIG. 4 illustrates a schematic structural view of a condenser in a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 5 illustrates a schematic structural view of a muffler in a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 6 illustrates a schematic structural view of a first partition in a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 7 illustrates a structural schematic view of a cuff of a first baffle in a heavy vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 8 shows a schematic structural view of an exhaust pipe in a heavy vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 9 illustrates a schematic structural view of a check device in a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application;

FIG. 10a shows a schematic view of a check device in a heavy vehicle exhaust muffler system according to another exemplary embodiment of the present application, FIG. 10b shows a schematic view of an open state of the check device in FIG. 10a, and FIG. 10c shows a schematic view of a closed state of the check device in FIG. 10 a;

FIG. 11 illustrates a schematic structural view of a vibration damping device in a heavy-duty vehicle exhaust muffler system according to an exemplary embodiment of the present application.

The reference numbers illustrate:

1 first bellows assembly, 101 bellows flange, 102 bellows, 103 guide shell, 104 seal, 105 bellows mounting groove, 106 guide shell mounting groove, 107 annular protrusion, 2 condenser, 201 condenser flange, 202 first end cap, 203 outlet pipe, 204 water pipe flange, 205 condenser pipe, 206 condenser shell, 207 condensing fin, 208 inlet pipe, 209 second end cap, 3 second bellows assembly, 4 muffler, 401 first muffler flange, 402 inlet pipe, 403 first shell end cap, 404 muffler shell, 405 first baffle, 406 muffler pipe, 407 middle pipe, 408 second baffle, 409 tail muffler plate, 410 second shell end cap, 411 outlet pipe, 412 first through hole, 413 first muffler hole, 414 flange, 5 third bellows assembly, 6 damper, 601 spring damper column, 602 mounting block, 7 exhaust pipe, 701 exhaust flange, 702 exhaust tail pipe, 703 check device, 704 baffles, 705 mounting plates, 706 movable baffles.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be noted that, unless otherwise specified, technical terms or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

To solve the problems of the prior art, as shown in fig. 1 to 11, the present invention provides a heavy vehicle exhaust silencing system, the heavy vehicle includes an engine system, the engine system includes an exhaust port, the heavy vehicle exhaust silencing system includes a condenser 2, a silencer 4 and an exhaust pipe 7; wherein,

the condenser 2 comprises a condenser inlet and a condenser outlet, and the condenser inlet is communicated with the exhaust port;

the silencer 4 comprises a silencer inlet and a silencer outlet, and the silencer inlet is communicated with the condenser outlet;

the exhaust pipe 7 includes an exhaust inlet and an exhaust outlet, the exhaust inlet communicating with the muffler outlet, the exhaust outlet communicating with the outside of the vehicle;

the condenser inlet is communicated with the exhaust port through the first corrugated pipe assembly 1, the condenser outlet is communicated with the silencer inlet through the second corrugated pipe assembly 3, and the silencer outlet is communicated with the exhaust pipe inlet through the third corrugated pipe assembly 5.

The invention relates to an exhaust silencing system for a heavy vehicle, as shown in figure 1, a condenser 2, a silencer 4 and an exhaust pipe 7 are sequentially arranged along the flow direction of exhaust gas of an engine system, high-temperature flue gas emitted by the engine system is sequentially cooled by the condenser 2, silenced and denoised by the silencer 4, and finally discharged to the outside of the vehicle by the exhaust pipe 7; the condenser 2 is used for cooling high-temperature smoke exhausted by an engine system, namely exhausted gas, so that the service life of the exhaust silencing system is prolonged, high temperature is prevented from being transmitted to a chassis, and components of the chassis of a vehicle are protected; the muffler 4 is used for carrying out noise reduction treatment on the gas discharged by the engine system, so that the exhaust noise is reduced; the problems of excessive vibration and thermal compensation of the heavy vehicle during running can be effectively solved through the first bellows assembly 1, the second bellows assembly 3 and the third bellows assembly 5. Compared with the prior art, the exhaust silencing system for the heavy vehicle has the advantages of simplified structure, lighter weight and good vibration and silencing effects, and simultaneously, the condenser 2 can be used for cooling high-temperature smoke, so that the problems of complex structure, large volume, overweight, high noise and general high-temperature resistance of the exhaust pipe of the existing heavy vehicle are solved.

As a preferred embodiment of the present invention, the first bellows assembly 1, the second bellows assembly 3, and the third bellows assembly 5 are bellows assemblies having the same structure, as shown in fig. 2, the first bellows assembly 1, the second bellows assembly 3, and the third bellows assembly 5 respectively include a bellows 102, a guide cylinder 103, a pair of bellows flanges 101, and a pair of seals 104, wherein,

the corrugated pipe flange 101 is annular, the pair of corrugated pipe flanges 101 are parallel to each other, the opposite side surfaces of the pair of corrugated pipe flanges 101 are sequentially provided with a corrugated pipe installation groove 105 and a guide cylinder installation groove 106 from outside to inside, the corrugated pipe installation groove 105 and the guide cylinder installation groove 106 are respectively arranged concentrically with the corrugated pipe flange 101, the inner diameter of the guide cylinder installation groove 106 is smaller than that of the corrugated pipe installation groove 105, and the inner diameter of the guide cylinder installation groove 106 is larger than that of the corrugated pipe flange 101;

two ends of the corrugated pipe 102 are respectively inserted into the corrugated pipe mounting grooves 105 of the pair of corrugated pipe flanges 101, and the end part of the corrugated pipe 102 is fixed with the corrugated pipe mounting grooves 105 by welding;

two ends of the guide cylinder 103 are respectively inserted into the guide cylinder mounting grooves 106 of the pair of corrugated pipe flanges 101, and the guide cylinder 103 is axially slidably inserted into the corrugated pipe 102;

a pair of seals 104 are provided on opposite sides of the pair of bellows flanges 101.

The bellows flange 101 is used for being connected with an upstream device or a flange of a downstream device so as to connect the bellows assembly with the upstream device or the downstream device, the sealing element 104 may be an O-ring, the sealing element 104 is arranged on one side of the bellows flange 101, which is away from the bellows 102, and is used for sealing when being connected with flanges of other devices, a groove for installing the sealing element 104 may be arranged on one side of the bellows flange 101, which is away from the bellows 102, a part of the sealing element 104 is clamped in the groove, and another part of the sealing element 104 protrudes out of the surface of the bellows flange 101, and is used for being clamped by flanges of other devices and the bellows flange 101 to realize sealing; the guide cylinder 103 can effectively guide the passing gas, so that the corrugated pipe assembly is effectively protected, and the service life of the corrugated pipe assembly is prolonged; the bellows 102 can absorb vibration, and the guide shell 103 can slide inside the bellows 102 and between the guide shell mounting grooves 106 of the pair of bellows flanges 101 by a certain displacement amount, so that the problem of excessive vibration can be further solved. The bellows 102 is a conventional product, and the detailed structure and the expansion principle are not described in detail.

As a preferred embodiment of the present invention, as shown in fig. 3, the inner circumferential wall of the guide cylinder 103 is flush with the inner wall of the bellows flange 101 to ensure smooth passage of gas, annular protrusions 107 are respectively disposed on the outer walls of both ends of the guide cylinder 103, the annular protrusions 107 are disposed perpendicular to the axial direction of the guide cylinder 103, the annular protrusions 107 are in sliding contact with the inner wall of the guide cylinder mounting groove 106, the contact end of the annular protrusion 107 with the guide cylinder mounting groove 106 is arc-shaped, and a gap is formed between the outer wall of the guide cylinder 103 and the bellows 102.

As a preferred embodiment of the present invention, the bellows flanges 101 at both ends are respectively formed in a step form by the bellows mounting groove 105, the guide cylinder mounting groove 10 and the bellows flange 101, the bellows mounting groove 105, the guide cylinder mounting groove 106 and the inner wall of the bellows flange 101 are sequentially communicated, a round arc is passed between the groove bottom of the guide cylinder mounting groove 106 and the groove wall, a round arc is passed between the annular protrusion 107 and the outer wall of the guide cylinder 103, the bellows 102 is fixed in the bellows mounting groove 105 by welding, the inner wall of the end of the bellows 102 does not protrude from the inner wall of the guide cylinder mounting groove 106, the groove bottom of the bellows mounting groove 105 is an inclined surface inclined toward the guide cylinder mounting groove 106, the guide cylinder 103 is connected in the guide cylinder mounting groove 106 in an axial sliding manner, and the inner wall of the guide cylinder 103 does not protrude from the inner wall of the bellows flange 101. The draft tube 103 is embedded in the draft tube mounting groove 106 to prevent the draft tube 103 from falling off.

The annular protrusion 107 can be used as a sliding block on one hand to facilitate the guide cylinder 103 to slide between the pair of corrugated pipe flanges 101, and on the other hand, an annular gap can be formed between the outer wall of the guide cylinder 103 and the corrugated pipe 102 to provide an expansion space of the corrugated pipe 102, ensure that the thermal expansion of the guide cylinder 103 is not limited, reduce or even avoid the friction between the guide cylinder 103 and the corrugated pipe 102, prolong the service life, and avoid the friction noise; the contact end of the annular protrusion 107 is arc-shaped, so that the guide cylinder 103 and the corrugated pipe flange 101 form a spherical hinge structure, the coaxiality of the corrugated pipe flanges 101 is ensured, and the corrugated pipe flanges 101 can deflect within a certain angle to protect an exhaust port of an engine system. The guide shell 103 can slide along the axial direction of the corrugated pipe 102 so as to absorb the axial and radial vibration of the engine system and the corrugated pipe assembly and the displacement of the thermal compensation area, and has the effect of high temperature resistance, so that the problem of thermal compensation of the heavy vehicle in the driving process can be effectively solved.

The bellows flange 101 at one end of the first bellows assembly 1 is in communication with an exhaust port of an engine system via a quick-connect coupling. The exhaust port of the engine system is located upstream of the first bellows assembly 1, and exhaust gas from the exhaust port of the engine system enters the first bellows assembly 1.

The first bellows assembly 1 is communicated with an exhaust port of an engine system through a quick connector, wherein the quick connector comprises a male connector and a female connector, and the male connector and the female connector are respectively connected to a bellows flange 101 of the first bellows assembly 1 and the exhaust port of the engine system, so that the first bellows assembly 1 and the exhaust port can be quickly mounted and dismounted. The quick coupling is an existing product, and specific structures and working principles are not described in detail.

When the first bellows assembly 1 is vibrated, the bellows 102 can expand and contract to a certain extent to absorb vibration, reduce noise caused by vibration, and have a flexible damping effect, on the basis, because asynchronous vibration exists between an engine system and a vehicle body of a heavy vehicle, the vibration can generate larger alternating stress, the bellows 102 can expand and contract to a certain extent to absorb vibration, and the bellows flange 101 can deflect within a certain angle due to a spherical hinged structure formed by the guide cylinder 103 and the bellows flange 101, so that the bellows assembly is suitable for asynchronous vibration at two ends of the bellows assembly, meets the use requirement, and can effectively solve the problems of overlarge vibration and thermal compensation of the heavy vehicle in the driving process.

The exhaust pipeline of an engine system of a heavy vehicle is arranged on a vehicle chassis, and the exhaust pipeline of the engine system exhausts gas, so that the service life of the whole exhaust pipeline is influenced due to high gas temperature, the heat radiation is easily carried out on the vehicle chassis, the chassis is overheated, and components of the vehicle chassis are damaged.

As a preferred embodiment of the present invention, as shown in fig. 4, the condenser 2 includes a first end cap 202, a condenser tube 205, a condenser case 206, a plurality of condensing fins 207, an inlet tube 208, an outlet tube 203, and a second end cap 209;

the first end cover 202 is hermetically connected with one end of the condenser shell 206, the second end cover 209 is hermetically connected with the other end of the condenser shell 206, and the first end cover 202 and the second end cover 209 are parallel to each other and perpendicular to the axial direction of the condenser shell 206;

the water inlet pipe 208 is arranged at the top of the outer wall of the condenser shell 206, the water inlet pipe 208 is used for introducing condensed water into the condenser shell 206, the water outlet pipe 203 is arranged at the bottom of the outer wall of the condenser shell 206, and the water outlet pipe 203 is used for discharging the condensed water in the condenser shell 206;

the condenser tube 205 is inserted into the condenser shell 206, and the condenser tube 205 is hermetically inserted through the first end cap 202 and the second end cap 209 respectively;

the plurality of condensing fins 207 are arranged on the outer wall of the condensing pipe 205, the plurality of condensing fins 207 are positioned in the condenser shell 206, the plurality of condensing fins 207 are uniformly distributed along the circumferential direction of the condensing pipe 205, and each condensing fin 207 is provided with a plurality of condensing holes;

a pair of condenser flanges 201 are respectively arranged at two ends of the condensation pipe 205, the condenser flange 201 at one end of the condensation pipe 205 is in sealing connection with the corrugated pipe flange 101 at the other end of the first corrugated pipe assembly 1, and the condenser flange 201 at the other end of the condensation pipe 205 is in sealing connection with the corrugated pipe flange 101 at one end of the second corrugated pipe assembly 3.

The condenser 2 is connected to the downstream of the first bellows assembly 1, and the gas exhausted from the engine system enters the first bellows assembly 1 and then enters the condenser pipe 205 of the condenser 2.

The pair of condenser flanges 201 are respectively connected to two ends of a condenser pipe 205 through welding, one end of the condenser pipe 205 is a condenser inlet, the other end of the condenser pipe 205 is a condenser outlet, a sealing element 104 is connected to the corrugated pipe flange 101 at the other end of the first corrugated pipe assembly 1, the condenser flange 201 connected to the condenser inlet of the condenser pipe 205 is connected with the corrugated pipe flange 101 through bolts, and the sealing element 104 is clamped together with the corrugated pipe flange 101 to realize sealing; the second bellows assembly 3 is connected to the downstream of the condenser 2, so that the gas cooled by the condenser pipe 205 enters the bellows 102 of the second bellows assembly 3, the condenser flange 201 connected to the condenser outlet of the condenser pipe 205 is connected to the bellows flange 101 at one end of the second bellows assembly 3 by bolts, and sealing is achieved by the sealing member 104 between the condenser flange 201 and the bellows flange 101.

The condenser shell 206 is a hollow cylinder, the first end cover 202 is connected to one end of the condenser shell 206 by welding, the first end cover 202 and the condenser shell 206 can be sealed by welding, the second end cover 209 is connected to the other end of the condenser shell 206 by welding, and the second end cover 209 and the condenser shell 206 are sealed by welding; the first end cap 202 and the second end cap 209 are in a circular plate shape, a condenser pipe connection hole is formed in the middle of the first end cap 202 and the second end cap 209, the condenser pipe 205 penetrates through the condenser pipe connection holes of the first end cap 202 and the second end cap 209, and two ends of the condenser pipe 205 are respectively located on the outer sides of the first end cap 202 and the second end cap 209. The condensation duct 205 is hermetically connected to the condensation duct connection hole by welding.

The inlet pipe 208 is connected to the outer wall of the condenser housing 206 by welding, the outlet pipe 203 is connected to the outer wall of the condenser housing 206 by welding, and the ends of the inlet pipe 208 and the outlet pipe 203 departing from the condenser housing 206 are both connected to the water pipe flange 204 by welding.

The source that lets in the comdenstion water in the condenser 2 can be the water tank of vehicle, the delivery port intercommunication of the water tank of inlet tube 208 and vehicle, outlet pipe 203 communicates with the water inlet of the water tank of vehicle, in order to form the circulation water route, the delivery port intercommunication of the water tank of inlet tube 208 and vehicle is made respectively to lead to through water pipe flange 204, make the water inlet intercommunication of the water tank of outlet tube 203 and vehicle, circulation power through water tank self forms circulation loop, in order to let in the comdenstion water in condenser casing 206, the comdenstion water gets into from the bottom of condenser casing 206, flow out from the top of condenser casing 206, thereby carry out the heat transfer cooling to condenser pipe 205 that sets up in condenser casing 206, improve exhaust amortization system's life, avoid high temperature to transmit for the chassis simultaneously, protect vehicle chassis components and parts.

In other embodiments of the present invention, an external water source may also be provided, and the water inlet pipe 208 and the water outlet pipe 203 are respectively connected to a water outlet and a water inlet of the external water source through a pipeline to form a circulation loop, so as to perform heat exchange and temperature reduction on the high-temperature gas passing through the condenser pipe 205.

As a preferred embodiment of the present invention, as shown in fig. 4, the condensing fins 207 are strip-shaped plates, the condensing fins 207 are fixed to the outer wall of the condensing tube 205 by welding along a direction parallel to the axial direction of the condensing tube 205, and a plurality of condensing fins 207 are uniformly distributed along the circumferential direction of the condensing tube 205. The number of the condensing fins 207 is preferably 4-20, each condensing fin 207 is provided with a plurality of condensing holes uniformly distributed along the axial direction of the parallel condensing pipe 205, and condensed water in the condenser shell 206 can pass through the condensing holes to form repeated baffling, so that the cooling and radiating area is increased, and the condenser 2 can greatly reduce the temperature of gas. The rate of decrease in the temperature of the gas introduced into the condenser tube 205 can be up to 70% by the circulation of the condensed water through the condensation holes and the condenser 2.

In order to avoid the influence of excessive noise on the comfort of people in the heavy vehicle and the influence on the surrounding environment in the running process of the heavy vehicle, the heavy vehicle exhaust silencing system provided by the invention is provided with the silencer 4 specially used for the heavy vehicle to reduce the noise, and the silencer 4 is connected to the downstream of the second corrugated pipe assembly 3 and connected to the downstream of the condenser 2 through the second corrugated pipe assembly 3, so that the gas cooled by the condenser 2 enters the second corrugated pipe assembly 3 and then enters the silencer 4 to be subjected to silencing and noise reduction treatment.

As a preferred embodiment of the present invention, as shown in fig. 5, the muffler 4 includes a muffler shell 404, an inlet pipe 402, an outlet pipe 411, a first partition 405, a second partition 408, a plurality of muffler pipes 406, a first muffler flange 401, a second muffler flange, and an intermediate pipe 407;

a sound absorbing material layer is attached to the inner wall of the silencer shell 404, a first mounting hole is formed in one end of the silencer shell 404, and a second mounting hole is formed in the other end of the silencer shell 404;

one end of the inlet pipe 402 is inserted into the first mounting hole, one end of the inlet pipe 402 is an elbow, and the other end of the inlet pipe 402 forms a silencer inlet;

a first noise reduction flange 401 is connected with the other end of the inlet pipe 402, and the first noise reduction flange 401 is hermetically connected with the corrugated pipe flange 101 at the other end of the second corrugated pipe assembly 3;

one end of the outlet pipe 411 is arranged in the second mounting hole in a penetrating manner, and the other end of the outlet pipe 411 forms a silencer outlet;

the second silencing flange is connected with the other end of the outlet pipe 411, and the second silencing flange is hermetically connected with the corrugated pipe flange 101 at one end of the third corrugated pipe assembly 5;

the first partition plate 405 and the second partition plate 408 are arranged in the silencer casing 404 at intervals along the gas flowing direction, and the first partition plate 405 and the second partition plate 408 are respectively provided with a plurality of uniformly distributed first silencing holes 413;

a plurality of first through holes 412 are formed in the first partition plate 405, and a plurality of second through holes are formed in the second partition plate 408;

one end of each silencing tube 406 is inserted into one first through hole 412, the other end of each silencing tube 406 penetrates through one second through hole, the axial directions of the silencing tubes 406 are parallel to the axial direction of the silencer shell 404, and a plurality of second silencing holes are uniformly distributed in the tube wall of each silencing tube 406;

the middle pipe 407 and the silencer housing 404 are concentrically arranged, the middle pipe 407 comprises a first straight pipe section, a conical pipe section and a second straight pipe section which are sequentially communicated, the first straight pipe section is inserted into a first through hole 412, the second straight pipe section is inserted into a second through hole, the conical pipe section is located between the first partition plate 405 and the second partition plate 408, and the conical pipe section is close to the second partition plate 408;

and a plurality of third silencing holes are uniformly distributed on the pipe wall of the first straight pipe section and/or the conical pipe section.

Wherein, the one end of second bellows subassembly 3 is connected in condenser 2, and the bellows flange 101 that is located this end of the other end of second bellows subassembly 3 is connected with first amortization flange 401, is equipped with sealing member 104 on the bellows flange 101, and bellows flange 101 passes through bolted connection with first amortization flange 401 to be fixed, and bellows flange 101 and first amortization flange 401 clamp sealing member 104 and realize sealedly.

The muffler shell 404 includes a shell body having a cylindrical shape with both ends open, a first shell end cover 403 connected to one end of the shell body by welding and sealing, and a second shell end cover 410 connected to the other end of the shell body by welding and sealing, so that an inner cavity of the muffler shell 404 forms a muffler chamber. The inner wall of the muffler case 404 is attached with a sound absorbing material layer made of a sound absorbing material, and the wall thickness of the muffler 4 can be reduced by the sound absorbing material layer, thereby reducing the weight of the muffler 4 and improving the muffling ability of the muffler 4.

The sound absorbing material layer is made by sound absorbing material, and sound absorbing material is current product, can select for use porous sound absorbing cotton, through gluing or fix with rivet on the inner wall of muffler cavity.

A first mounting hole is formed in the first shell end cover 403, the inlet pipe 402 is inserted and fixed in the first mounting hole by welding, one end of the inlet pipe 402 extends into the silencer shell 404 to enable the inlet pipe 402 to be communicated with a silencer chamber, the other end of the inlet pipe 402 is positioned outside the silencer shell 404, the first silencing flange 401 is fixedly connected with the other end of the inlet pipe 402, namely the end of the inlet pipe 402 positioned outside the silencer shell 404 by welding to form a silencer inlet, and the first silencing flange 401 is fixedly connected and sealed with the corrugated pipe flange 101 of the second corrugated pipe assembly 3 through bolts and a sealing element 104;

wherein, first mounting hole sets up the upper portion at first shell end cover 403, and the part that inlet pipe 402 stretched into in muffler shell 404 is the return bend, and the return bend is crooked towards the middle part of muffler shell 404 to gas drainage to muffler chamber bottom to a great extent increases gaseous circulation area, increases the perforation rate, and then improves the silencing ability of muffler 4.

The second housing end cover 410 is provided with a second mounting hole, the second mounting hole is concentrically arranged with the muffler housing 404, the outlet pipe 411 is inserted and fixed in the second mounting hole by welding, one end of the outlet pipe 411 extends into the muffler housing 404 and is communicated with the muffler chamber, the other end of the outlet pipe 411 is positioned outside the muffler housing 404, and a second silencing flange is fixedly connected to the other end of the outlet pipe 411 by welding, namely the outlet pipe 411 is positioned at the outer end of the muffler housing 404 to form a muffler outlet.

The third bellows assembly 5 is disposed downstream of the muffler 4, and the second muffler flange and the bellows flange 101 of the third bellows assembly 5 are connected and fixed by bolts and a seal 104 and sealed.

The gas that flows out from second bellows subassembly 3 passes through the muffler entry and gets into the muffler chamber, then flow through the muffler export, in this process, along the gas flow direction, interval setting around first baffle 405 and second baffle 408 are, and first baffle 405 and second baffle 408 pass through welded fastening with the inner wall of muffler shell 404 respectively, block and keep apart gas through first baffle 405 and second baffle 408, and all be equipped with first bloop 413 on first baffle 405 and the second baffle 408, first bloop 413 on the first baffle 405 is discharged along the surface of first baffle 405 and is filled and the equipartition, first bloop 413 on the second baffle 408 is filled and the equipartition along the surface of second baffle 408, can make the gas that dashes into in the muffler chamber obtain the speed reduction through first bloop 413, the damping, and the effect of amortization.

The first partition 405 and the second partition 408 have the same structure, as shown in fig. 6, the plurality of first muffling holes 413 of the first partition 405 and the plurality of first muffling holes 413 of the second partition 408 are respectively arranged along the transverse direction and the longitudinal direction in a staggered manner, so that the structure can better match the muffling of the second muffling holes of the muffling pipes 406 with different lengths, and generate resonance in the chamber of the muffler, thereby improving the muffling effect.

The first partition plate 405 is provided with a plurality of first through holes 412, each first through hole 412 is used for being inserted into one end of one silencing pipe 406 or one end of the middle pipe 107, the second partition plate 408 is provided with a plurality of second through holes, each second through hole is used for being inserted into the other end of one silencing pipe 406 or the other end of the middle pipe 407, the first through holes 412 correspond to the second through holes in a one-to-one mode, and two ends of the middle pipe 407 are connected to the first through holes 412 and the second through holes which are concentrically arranged with the silencer shell 404 through welding.

The intermediate pipe 407 is positioned at the center and concentrically arranged with the muffler case 404, and a plurality of muffler pipes 406 are arranged around the intermediate pipe 407, and the pipe diameter of the intermediate pipe 407 is larger than that of the muffler pipes 406. The taper pipe section of the middle pipe 407 comprises an annular taper pipe wall which is arranged in an inclined manner, and the inclination of the taper pipe wall enables the flow velocity of the gas to be increased under the condition that the oil consumption is not additionally increased by the middle pipe 407, so that the perforation rate of the gas in the silencer 4 is increased, and the sound can be greatly reduced. The conical pipe wall of the conical pipe section forms an included angle with the axial direction of the silencer shell 404, the included angle is 60 degrees, and through calculation and simulation verification of fluid mechanics, the effect of the middle pipe 407 on the flow velocity of gas is optimal under the included angle. The first straight section of the intermediate pipe 407 is connected to the first through hole 412 by welding and protrudes slightly from the first partition 405, and the second straight section of the intermediate pipe 407 is connected to the second through hole by welding and protrudes from the second partition 408.

As a preferred embodiment of the present invention, the length of the first straight section of the intermediate pipe 407 is greater than the length of the conical section, and the conical section is disposed near the second partition 408, and the first straight section and the conical section of the intermediate pipe 407 are provided with third damping holes, so that the gas passing through the intermediate pipe 407 is decelerated and damped.

One end of each of the muffling tubes 406 is fixed in one of the first through holes 412 by welding, the other end of each of the muffling tubes 406 passes through one of the second through holes, and each of the muffling tubes 406 is fixed to the second through hole by welding. The muffler pipe 406 is provided with a second muffler hole so that the gas passing through the muffler pipe 406 is decelerated and damped. The second muffling holes of the muffling tube 406 are arranged in a rectangular array, so that the perforation rate can be greatly increased, and the muffling can be maximized in a limited space.

In order to increase the flexibility of the heavy vehicle, reduce the weight of the exhaust muffler system, and at the same time, withstand the high temperature environment, a high temperature alloy is selected as the material of the whole muffler 4, and the material is preferably nickel-based alloy Inconel718, so that the muffler 4 can resist corrosion and high temperature, and reduce the weight of the muffler 4.

As a preferred embodiment of the present invention, there are four silencing tubes 406, which are a first silencing tube, a second silencing tube, a third silencing tube and a fourth silencing tube;

the length of the first muffler pipe is 5/12 the length of the muffler shell 404;

the length of the second muffler pipe is 1/2 the length of the muffler shell 404;

the length of the third muffler pipe is 7/12 the length of the muffler shell 404;

the length of the fourth muffler pipe is 2/3 the length of the muffler shell 404.

The first partition plate 405 and the second partition plate 408 divide the silencer cavity into a first cavity, a second cavity and a third cavity which are sequentially communicated, the inlet pipe 402 is communicated with the first cavity to input gas into the first cavity, the gas enters the second cavity through the first partition plate 405 and enters the third cavity through the second partition plate 408, the silencing pipes 406 and the middle pipes 407, the outlet pipe 411 is communicated with the third cavity to discharge the gas in the third cavity, the four silencing pipes 406 are communicated with the first partition plate 405 and extend into the third cavity through the second partition plate 408, the lengths of the four silencing pipes 406 are different, and through the silencing pipes 406 with different lengths, when the gas flows out of the silencing pipes 406, gas molecules collide and vibrate at different positions to decelerate the gas, so that the perforation rate is increased, and the damping effect is further improved. Through calculation of fluid mechanics, the arrangement of the muffling tubes 406 in the second chamber and the third chamber can maximize the perforation rate of the gas, thereby achieving the best muffling effect.

In other embodiments of the present invention, the lengths of the four muffling tubes 406 may be the same in pairs, and the muffling effect is also better.

As a preferred embodiment of the present invention, the muffler 4 further includes a tail muffler plate 409, the tail muffler plate 409 is a hemispherical plate, the hemispherical plate includes an arc-shaped end and an open end, a third mounting hole is disposed in the middle of the arc-shaped end of the tail muffler plate 409, one end of the outlet pipe 411 passes through the second mounting hole and is connected to the third mounting hole, and one end of the outlet pipe 411 is connected to the third mounting hole by welding;

the open end of the tail muffler plate 409 is connected with the side wall of the muffler shell 404 by welding;

a plurality of fourth muffling holes are uniformly distributed on the tail muffling plate 409.

The open end of afterbody acoustical panel 409 sets up towards second baffle 408, and outlet pipe 411 passes through welded fastening with second mounting hole and third mounting hole respectively, improves outlet pipe 411's joint strength, and through afterbody acoustical panel 409's hemispherical structure, can carry out the drainage to the gas in the third chamber to a certain extent, can block and keep apart gas simultaneously, can make gaseous speed reduction and damping through the fourth sound attenuation hole, further improves the noise cancelling effect.

As a preferred embodiment of the present invention, as shown in fig. 7, a joint between the outer wall of the first partition plate 405 and the muffler shell 404, a joint between the outer wall of the second partition plate 408 and the muffler shell 404, a first through hole 412 of the first partition plate 405, and a second through hole of the second partition plate 408 are respectively provided with flanges 414, the flanges 414 are connected with the muffler shell 404 by welding, and the length of the flanges 414 is not less than 2 mm.

The first partition plate 405 and the second partition plate 408 are respectively welded with the silencer shell 404 through the turned-over edge 414, the first through hole 412 of the first partition plate 405 and the second through hole of the second partition plate 408 are respectively welded with the silencing pipe 406 or the middle pipe 407 through the turned-over edge 414, the welding difficulty of the thin-wall part can be greatly reduced through the turned-over edge 414, the welding strength is further improved, the deformation is reduced, the integral structure of the silencer 4 is more stable, and the reliability is higher.

According to the heavy vehicle exhaust silencing system, when the silencer 4 reduces noise, gas can generate certain vibration through the silencer 4 to damage the silencer 4 and nearby pipelines, so that the second corrugated pipe assembly 3 is connected to the inlet of the silencer 4, the third corrugated pipe assembly 5 is connected to the outlet of the silencer, the vibration of the silencer 4 is absorbed through the second corrugated pipe assembly 3 and the third corrugated pipe assembly 5, the service lives of the silencer 4 and the whole pipeline are prolonged, all parts of the silencer 4 are connected through welding, vibration between the inner parts of the silencer 4 can be reduced, and the whole structure is more stable and reliable.

The downstream of the silencer 4 is communicated with the third corrugated pipe assembly 5, the second silencing flange is hermetically connected with a corrugated pipe flange 101 at one end of the third corrugated pipe assembly 5 through a sealing piece 104, and the corrugated pipe flange 101 at the other end of the third corrugated pipe assembly 5 is hermetically connected with an exhaust inlet of the exhaust pipe 7 through the sealing piece 104.

As a preferred embodiment of the present invention, as shown in fig. 8, the exhaust pipe 7 includes an exhaust flange 701 and a tail pipe 702, the exhaust flange 701 is fitted over one end of the tail pipe 702, the exhaust flange 701 is sealingly connected to the bellows flange 101 at the other end of the third bellows assembly 5, and the other end of the tail pipe 702 is bent toward the ground. One end of tail pipe 702 is the straight tube for connect third bellows subassembly 5, and tail pipe 702's the other end is the return bend, and the crooked direction of return bend just sets up towards ground, can prevent to a certain extent that outside water from flowing into blast pipe third bellows subassembly 5 to get into muffler 4, and lead to the system to damage.

The exhaust flange 701 is annular, the exhaust flange 701 is sleeved on the tail pipe 702 and is fixed with the tail pipe 702 through welding, an exhaust inlet is formed by the exhaust flange 701 and one end of the tail pipe 702, an exhaust outlet is formed by the other end of the tail pipe 702, the exhaust flange 701 is connected with the corrugated pipe flange 101 through bolts, and the sealing element 104 on the corrugated pipe flange 101 is clamped by the exhaust flange 701 and the corrugated pipe flange 101 so as to seal the joint.

The tail pipe 702 is used to discharge the cooled and muffled gas out of the vehicle, and the gas enters from the exhaust inlet and is discharged from the exhaust outlet.

As a preferred embodiment of the present invention, the exhaust pipe 7 may further include a check device 703, and the check device 703 is provided on the tail pipe 702, and is opened for exhaust when gas passes through, and can be closed when the vehicle is in a stationary state to prevent the external environmental medium from flowing back, thereby protecting the internal structure of the muffler 4.

In one embodiment of the present invention, as shown in fig. 9, the non-return device 703 includes a baffle 704 and a return spring, the other end, i.e. the bottom, of the tail pipe 702 has an opening, one side of the bottom of the tail pipe 702 is provided with a fixed block, one end of the return spring is connected to the fixed block, the other end of the return spring is connected to one end of the baffle 704, the other end of the baffle 704 is hinged to the other side of the bottom of the tail pipe 702 through a hinge shaft, the baffle is fastened to the tail pipe 702 under the action of the return spring and the hinge shaft, when gas is discharged at a certain pressure, the pressure of the gas can act on the return spring to stretch the return spring, so that the baffle 704 is opened and rotated around the hinge shaft to open, the gas is discharged, the non-return device 703 is in an open state, when no gas is discharged, the return spring is reset to fasten the baffle 704 to the bottom opening of the tail pipe 702, and the non-return device 703 is in a closed state, preventing the medium in the external environment from flowing back.

In another embodiment of the present invention, as shown in fig. 10a to 10c, the check device 703 includes a mounting plate 705 and a movable baffle 706, the mounting plate 705 is annular, the mounting plate 705 is welded inside one end of the tail pipe 702, the mounting plate 705 is close to the third bellows assembly 5, the movable baffle 706 is circular plate-shaped, the top of the mounting plate 705 is provided with a hinge seat, the top of the movable baffle 706 is provided with a shaft sleeve, and the shaft sleeve and the hinge seat are hinged through a hinge shaft, so that the movable baffle 706 is rotatably connected to a side of the mounting plate 705 away from the third bellows assembly 5. When air passes through, as shown in fig. 10b, the air pressure flows out through the middle of the mounting plate 705 and pushes the movable baffle 706 open, so that the movable baffle 706 is lifted upwards, and the check device 703 is in an open state; when the vehicle is stationary, as shown in fig. 10c, the flapper 706 drops down due to its own weight to block the middle of the mounting plate 705, at which time the check device 703 is closed, preventing the ingress of ambient media.

The heavy vehicle can generate vibration in the running process, and the high-frequency vibration can easily damage an exhaust pipeline, so that the heavy vehicle exhaust silencing system provided by the invention is provided with the vibration damping device 6 on the pipeline in the exhaust silencing system to reduce the vibration of the joint.

As a preferred embodiment of the present invention, the heavy vehicle exhaust silencing system further comprises at least one vibration damping device 6, the vibration damping device 6 being provided on the condenser 2 and/or the exhaust pipe 7;

as shown in fig. 11, the vibration damping device 6 includes a vibration damping housing, a plurality of mounting blocks 602, and a plurality of spring vibration damping columns 601, the vibration damping housing is cylindrical, the vibration damping housing is sleeved on the condenser 2 or the exhaust pipe 7, an outer wall of the vibration damping housing is connected to a chassis of the vehicle, one end of the mounting block 602 is connected to an inner wall of the vibration damping housing, the other end of the mounting block 602 is arranged toward an axial direction of the vibration damping housing, and the mounting blocks 602 are uniformly distributed along a circumferential direction of the vibration damping housing;

each mounting block 602 is provided with a vibration damping mounting hole;

the spring damping columns 601 comprise cylinder bodies, springs and plunger heads, and the cylinder body of each spring damping column 601 is inserted into a damping mounting hole of one mounting block 602;

the spring is arranged in the cylinder body;

one end of the plunger head extends into the barrel body, one end of the plunger head is connected to the spring, and the other end of the plunger head protrudes out of the barrel body;

the plunger heads of the plurality of sprung vibration damping columns 601 elastically abut on the condenser 2 or the exhaust pipe 7.

The damping shell is of a cylindrical structure, two ends of the damping shell can be sealed or not, the damping shell is sleeved on the condensation pipe 205 or the tail pipe 702, one end of the mounting block 602 is fixed on the inner wall of the damping shell through welding, the cylinder body of the spring damping column 601 is fixed in the damping mounting hole through welding, at least part of the cylinder body is exposed out of the damping mounting hole, one end of the plunger head is clamped on the cylinder body, the other end of the plunger head extends out of the cylinder body, the spring damping columns 601 are uniformly distributed along the circumferential direction of the damping shell to clamp the condensation pipe 205 or the tail pipe 702 in the axial direction of the damping shell, and therefore the condensation pipe 205 or the tail pipe 702 is stressed uniformly. The vibration reduction shell is connected to a chassis of a vehicle and can be fixedly connected with the chassis through a connecting rod welded with the chassis.

As a preferred embodiment of the present invention, as shown in fig. 1, three vibration dampers 6 are provided, respectively, at both ends of the condensation duct 205 of the condenser 2 and the exhaust duct 7, to stably clamp the condensation duct 205 or the exhaust duct 7, each damping device 6 is provided close to the bellows assembly, the plunger head can be made of soft material, thereby reducing abrasion, the plunger heads of the plurality of spring damping columns 601 elastically abut against the condensation pipe 205 or the exhaust pipe 7 of the condenser 2, thereby, when the condensation pipe 205 or the exhaust pipe 7 is vibrated, the buffer device 6 is connected with the chassis of the vehicle, on one hand, the weight of the whole exhaust silencing system can be absorbed, the exhaust port of the engine system can be protected, on the other hand, the vibration of the connection part can be reduced, the integral structure of the exhaust silencing system has elastic buffering capacity, and the anti-vibration capacity of the integral system is improved, so that the stability of the integral structure is improved.

The flanges such as the corrugated pipe flange 101 and the like are annular and are sleeved on a pipeline and fixed with the pipeline through welding, and threaded holes are uniformly distributed in the flanges so as to be connected with the butt flange through bolts and are convenient to detach.

The exhaust silencing system for heavy vehicles according to the present invention is directly connected to an engine system, receives alternating stress generated by vibration of different frequencies from the engine, and communicates with an exhaust port of the engine system through a first bellows assembly 1, wherein the first bellows assembly 1 located between the exhaust port of the engine system and a condenser 2 plays a very good role in vibration damping and thermal compensation through a spherical hinge structure of a guide cylinder 103. The exhaust silencing system is integrally installed on a chassis of a heavy vehicle, and components on the chassis of the vehicle are easily damaged by high temperature and vibration, so that the condenser 2 is arranged at the downstream of the first corrugated pipe assembly 1 to cool high-temperature gas exhausted by an engine system, and the vibration damping device 6 is arranged between the condenser 2 and the chassis of the vehicle, so that the damage of the components on the chassis of the vehicle caused by the high temperature and the vibration can be avoided. In addition, during the vehicle is traveling, too much noise affects the comfort of the heavy vehicle occupants and the surrounding environment, and therefore, the noise is reduced by the muffler 4 downstream of the condenser 2, the second bellows assembly 3 is similarly provided between the condenser 2 and the muffler 4 to reduce the vibration at the joint, the muffler 4 has a structure that is low in weight, good in muffling effect and high in high temperature resistance, and the third bellows assembly 5 is provided between the muffler 4 and the exhaust pipe 7 to reduce the vibration at the joint. The exhaust silencing system for the heavy vehicle, disclosed by the invention, has the advantages of simplified structure, light weight and small volume, and is used for cooling gas discharged by an engine system and then carrying out noise reduction and silencing treatment, so that the problems of complex structure, large volume, overweight, high noise and general high temperature resistance of the exhaust pipe of the conventional heavy vehicle are solved.

It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are used to distinguish the embodiments, and do not represent merits of the embodiments.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A heavy vehicle exhaust muffler system, comprising an engine system including an exhaust port, the heavy vehicle exhaust muffler system comprising a condenser, a muffler and an exhaust pipe; wherein,

2. The heavy-duty vehicle exhaust muffler system of claim 1, wherein the first, second, and third bellows assemblies each include a bellows, a draft tube, a pair of bellows flanges, and a pair of seals, wherein,

3. The exhaust and noise reduction system for the heavy-duty vehicle as claimed in claim 2, wherein an inner peripheral wall of the draft tube is flush with an inner wall of the bellows flange, annular protrusions are respectively provided on outer walls of both ends of the draft tube, the annular protrusions are in sliding contact with the inner wall of the draft tube mounting groove, a contact end of the annular protrusion and the draft tube mounting groove is arc-shaped, and a gap is formed between the outer wall of the draft tube and the bellows;

4. The heavy-duty vehicle exhaust muffler system of claim 3, wherein the condenser includes a first end cap, a condenser tube, a condenser housing, a plurality of condensing fins, a water inlet tube, a water outlet tube, and a second end cap;

5. The heavy-duty vehicle exhaust muffler system of claim 4, wherein the muffler includes a muffler shell, an inlet pipe, an outlet pipe, a first baffle, a second baffle, a plurality of muffler pipes, a first muffler flange, a second muffler flange, and an intermediate pipe;

one end of the inlet pipe penetrates through the first mounting hole, the bent pipe is arranged at the one end of the inlet pipe, and the silencer inlet is formed at the other end of the inlet pipe;

6. The heavy-duty vehicle exhaust muffler system of claim 5, wherein said muffler pipes are four, respectively a first muffler pipe, a second muffler pipe, a third muffler pipe, and a fourth muffler pipe;

the length of the first muffler pipe is 5/12 the length of the muffler shell;

the length of the second muffler pipe is 1/2 the length of the muffler shell;

the length of the third muffler pipe is 7/12 the length of the muffler shell;

the length of the fourth muffler pipe is 2/3 the length of the muffler shell.

7. The heavy-duty vehicle exhaust muffler system according to claim 5, wherein said muffler further comprises a tail muffler plate, said tail muffler plate being a hemispherical plate, said hemispherical plate including an arcuate end and an open end, a third mounting hole being provided in a middle portion of the arcuate end of said tail muffler plate, said one end of said outlet pipe being connected to said third mounting hole through said second mounting hole, and said one end of said outlet pipe being connected to said third mounting hole by welding;

8. The heavy-duty vehicle exhaust muffler system according to claim 5, wherein flanges are provided at a junction of the outer wall of the first partition plate and the muffler shell, a junction of the outer wall of the second partition plate and the muffler shell, the first through hole of the first partition plate, and the second through hole of the second partition plate, respectively, the flanges being connected to the muffler shell by welding, and the flanges having a length of not less than 2 mm.

9. The heavy-duty vehicle exhaust muffler system according to claim 5, wherein said exhaust pipe includes an exhaust flange and a tail pipe, said exhaust flange being fitted over one end of said tail pipe, said exhaust flange being sealingly connected to said bellows flange at the other end of said third bellows assembly, said tail pipe being disposed with its other end bent toward the ground.

10. The heavy-duty vehicle exhaust muffler system of claim 1, further comprising at least one vibration damping device provided on said condenser and/or said exhaust pipe;

each mounting block is provided with a vibration damping mounting hole;

the spring is arranged in the cylinder body;