CN113464256A

CN113464256A - Elliptical cylinder straight-line silencer for improving power of generator of 5Kw unit

Info

Publication number: CN113464256A
Application number: CN202110814841.6A
Authority: CN
Inventors: 刘正林; 彭云
Original assignee: Chongqing Jiayang Industrial Co ltd
Current assignee: Chongqing Jiayang Industrial Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-10-01

Abstract

The invention relates to the technical field of barrel direct-exhaust silencers, and discloses an elliptical barrel direct-exhaust silencer capable of improving the power of a generator of a 5Kw unit. The silencer has the advantages that the effective volume of the cavity is increased, the power improvement and the silencing effect are facilitated, the volume ratio of each cavity is optimized, the average air speed of the silencer is reduced, the ventilation pipe and the ventilation aperture are optimized, the exhaust smoothness of each cavity is improved, the shell structure of the silencer is strengthened, the sound radiation is reduced, the exhaust flow guide and the heat insulation of the main air inlet pipe are realized, and the overhigh temperature of the whole or large area of the silencer is avoided.

Description

Elliptical cylinder straight-line silencer for improving power of generator of 5Kw unit

Technical Field

The invention relates to the technical field of barrel straight-line silencers, in particular to an elliptical barrel straight-line silencer for improving the power of a generator of a 5Kw unit.

Background

The silencer is a noise reduction device such as a pipeline and an elbow with sound absorption linings or a pipeline with suddenly changed sectional area and other discontinuous acoustic impedances and the like for an airflow pipeline with noise transmission, so that the noise in the pipeline is attenuated or reflected, the former is called a resistive silencer, the latter is called a reactive silencer, an impedance composite silencer and a straight exhaust funnel are also arranged, namely, the exhaust funnel comes out from an exhaust manifold, a catalyst section and a tail exhaust are removed, and the exhaust is directly exhausted into the air.

With regard to the straight muffler of traditional oval barrel that is applied to generator power promotion, the muffler adopts interior intubate formula backward flow three cavity structures when using, can lead to engine power loss ratio big, the interior heat insulating board structure of muffler, can lead to the effective volume of cavity to diminish and the inner chamber exhaust is retardant, the thermal diffusivity is poor, cause the high temperature, and then also can arouse the decline of engine continuous operation power, the inboard cavity of muffler adopts bi-pass trachea formula barrel inner bag, lead to inboard cavity baffle pore punching press processing manufacturability poor, the die life descends, can cause intake pipe exhaust high-temperature gas in addition, no water conservancy diversion structure, directly fill the inside of overflowing whole cavity, it is higher to lead to rear portion and surface temperature in the muffler, need the design of the imitative boiling hot structure of better guard shield.

Therefore, we propose an elliptical cylinder inline muffler for increasing the power of the generator of the 5Kw unit to solve the above problems.

Disclosure of Invention

In order to realize the purposes of avoiding large power loss ratio of an engine, optimizing an inner heat insulation plate structure of a silencer, avoiding reduction of effective volume of a cavity, exhaust retardation of an inner cavity, poor heat dissipation, preventing overhigh temperature, avoiding reduction of continuous running power of the engine, avoiding poor punching processing manufacturability of a cavity partition plate pore at the inner side of the silencer, prolonging the service life of a die, avoiding high-temperature gas exhausted by an air inlet pipe, having no flow guide structure, preventing the high temperature of the middle rear part and the surface of the silencer from directly overflowing the inside of the whole cavity, and avoiding the need of a better shield ironing imitation structure design, the invention provides the following technical scheme: the utility model provides a make straight muffler of oval barrel of 5Kw unit generator power promotion, includes the casing, the top welding of casing has the front end baffle, the inner wall of front end baffle has been seted up the inlet port, the bottom welding of casing has the rear end baffle, the inner wall welding of rear end baffle has the blast pipe, the inner wall swing joint of front end baffle has the intake pipe, the inner wall welding of casing has the baffle one admits air, the inner wall welding of casing has the baffle two admits air, the inner wall welding of baffle two admits air has seted up the air vent, the inner wall swing joint of baffle two admits air has the breather pipe.

Furthermore, the front end clapboard, the rear end clapboard, the first air inlet clapboard and the second air inlet clapboard are made of the same material and are made of steel.

Furthermore, the air inlet pipe penetrates through the front end partition plate, the first air inlet partition plate and the second air inlet partition plate.

Further, the diameter of the vent pipe is phi 30, and the cross section area of the vent pipe is close to that of the silencer.

Further, the inner diameter of the vent pipe is larger than that of the exhaust pipe, and the cross-sectional area of the vent pipe is larger than that of the exhaust pipe.

Furthermore, the pi support lug is arranged on the inner side of the shell, and the plate thickness of parts of the pi support lug is improved.

Further, the distance between the first air inlet partition plate and the second air inlet partition plate is larger than the distance between the front end partition plate and the second air inlet partition plate.

Further, the distance between the first air inlet partition plate and the second air inlet partition plate is larger than the distance between the rear end partition plate and the first air inlet partition plate.

Further, the plate thickness of the front end partition plate and the rear end partition plate is 1mm, and the plate thickness of the reinforcing plate and the supporting part inside the casing is 1 mm.

Further, the thickness of the structural part plate inside the shell is 0.8 mm.

Compared with the prior art, the principle and the beneficial effects of the technical scheme are as follows: the distance between the first air inlet partition plate and the second air inlet partition plate is increased to increase the effective volume of the cavity, which is helpful for power improvement and noise reduction effect, the distance between the first air inlet partition plate and the second air inlet partition plate on the inner side of the shell is larger than the distance between the rear end partition plate and the first air inlet partition plate, and the distance between the first air inlet partition plate and the second air inlet partition plate is larger than the distance between the front end partition plate and the second air inlet partition plate, so that the volume ratio of the inner side of the shell is improved, the volume ratio of each cavity is optimized, the average airflow speed of the silencer is reduced, the vent pipe and the vent hole diameter are optimized in the using process of the silencer, the exhaust smoothness of each cavity is improved, the shell structure of the silencer is strengthened, the thickness of the shell is increased, the strength of each part of a product is improved, the sound radiation effect is reduced, and the heat insulation of the silencer in the using process is considered, the flow guide and the heat insulation of the exhaust of the air inlet pipe are optimized, and the overhigh temperature of the whole silencer or a large area is avoided.

The following are other beneficial effects of the technical scheme:

through increaseing the effective volume of cavity, help power promotion and noise cancelling effect, the inboard baffle of admitting air of casing one is greater than the rear end baffle with the distance between the baffle of admitting air two, and the baffle of admitting air simultaneously one is greater than the front end baffle with the baffle of admitting air distance between two for the inboard volume ratio of casing is improved, makes commodity outward appearance molded lines pleasing to the eye, generous.

The thickness of pi journal stirrup is added to the thickness of thickness and the inboard thickness of spare part through the muffler casing, when the muffler plays a role, guarantees that the muffler can bear certain pressure and striking when using for the resistance of muffler increases, has improved the life of muffler, has guaranteed economic benefits.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the inside of the housing of FIG. 1 according to the present invention;

FIG. 3 is a schematic structural view of a second air inlet partition plate according to the present invention;

FIG. 4 is a schematic structural diagram of a front end baffle of the present invention.

Reference numerals:

1. a housing; 2. a front end baffle; 3. a rear end baffle plate; 4. a first air inlet clapboard; 5. a second air inlet clapboard; 6. An exhaust pipe; 7. a breather pipe; 8. a vent hole; 9. an air inlet; 10. an air inlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

Referring to fig. 1-4, the elliptic cylinder straight-line silencer for improving the power of the generator of the 5Kw unit comprises a shell 1, wherein a front end baffle 2 is welded at the top of the shell 1, the thicknesses of the front end baffle 2 and a rear end baffle 3 are 1mm, the thicknesses of a reinforcing plate and a supporting part on the inner side of the shell 1 are both 1mm, the thickness of a part plate of the inner side structure of the shell 1 is 0.8mm, and a pi-shaped lug is arranged on the inner side of the shell 1 and improves the thickness of the part plate of the pi-shaped lug;

the front end baffle plate 2, the rear end baffle plate 3, the first air inlet baffle plate 4 and the second air inlet baffle plate 5 are made of the same material and are made of steel, an air inlet hole 9 is formed in the inner wall of the front end baffle plate 2, the rear end baffle plate 3 is welded at the bottom of the shell 1, an exhaust pipe 6 is welded on the inner wall of the rear end baffle plate 3, an air inlet pipe 10 is movably connected to the inner wall of the front end baffle plate 2, the air inlet pipe 10 penetrates through the front end baffle plate 2, the first air inlet baffle plate 4 and the second air inlet baffle plate 5, the first air inlet baffle plate 4 is welded on the inner wall of the shell 1, the distance between the first air inlet baffle plate 4 and the second air inlet baffle plate 5 is larger than the distance between the front end baffle plate 2 and the second air inlet baffle plate 5, and the distance between the first air inlet baffle plate 4 and the second air inlet baffle plate 5 is larger than the distance between the rear end baffle plate 3 and the first air inlet baffle plate 4;

the inner wall of the shell 1 is welded with a second air inlet partition plate 5, the inner wall of the second air inlet partition plate 5 is provided with a round hole 8, the inner wall of the second air inlet partition plate 5 is movably connected with a vent pipe 7, the aperture of the vent pipe 7 is phi 30, the sectional area of the vent pipe 7 is close to that of the silencer 20, the inner diameter of the vent pipe 7 is larger than that of the exhaust pipe 6, and the sectional area of the vent pipe 7 is larger than that of the exhaust pipe 6.

Referring to fig. 1 and 2, the elliptical cylinder straight-line silencer for improving the power of the generator of the 5Kw unit comprises a shell 1, wherein a front end baffle 2 is welded at the top of the shell 1, the thicknesses of the front end baffle 2 and a rear end baffle 3 are 1mm, the thicknesses of a reinforcing plate and a supporting part on the inner side of the shell 1 are both 1mm, the thickness of a part plate of an inner side structure of the shell 1 is 0.8mm, and a pi support lug is arranged on the inner side of the shell 1 and the thickness of the part of the pi support lug is improved. The principle of the structure inside the housing 1 is as follows:

the muffler shell 1 is structurally reinforced: the sound radiation is one of sound transmission ways of the silencer, the structure of the inner side of the shell 1 is strengthened, the thickness of the shell is increased, the strength of each part of the product is improved, and the sound radiation effect of the shell can be reduced.

As another embodiment of the invention, referring to fig. 1-4, an elliptical cylinder straight-line silencer for improving the power of a generator of a 5Kw unit comprises a shell 1, wherein a front end baffle 2 is welded on the top of the shell 1, the thicknesses of the front end baffle 2 and a rear end baffle 3 are 1mm, the thicknesses of a reinforcing plate and a supporting part on the inner side of the shell 1 are both 1mm, the thickness of a plate of a structural part on the inner side of the shell 1 is 0.8mm, and a pi-shaped lug is mounted on the inner side of the shell 1 and the thickness of a part of the pi-shaped lug is improved;

front end baffle 2, rear end baffle 3, the material of baffle 4 and the baffle two 5 that admits air is the same, be the steel material, inlet port 9 has been seted up to the inner wall of front end baffle 2, the bottom welding of casing 1 has rear end baffle 3, the inner wall welding of rear end baffle 3 has blast pipe 6, the inner wall swing joint of front end baffle 2 has intake pipe 10, intake pipe 10 runs through in front end baffle 2, baffle 4 and the baffle two 5 that admits air admit air of admitting air, the inner wall welding of casing 1 has baffle 4 that admits air, the distance between baffle 4 that admits air and the baffle two 5 that admits air is greater than the distance between front end baffle 2 and the baffle two 5 that admits air, the distance between baffle 4 that admits air and the baffle two 5 that admits air is greater than the distance between rear end baffle 3 and the baffle 4 that admits air. The following is the principle of the above structure:

when air enters through an air inlet partition plate of the silencer, the effective volume of a cavity is effectively enlarged, the bosses of the front end cover and the bosses of the rear end cover are deepened by 5mm respectively compared with a conventional product, the effective volume of the cavity is effectively enlarged, power improvement and silencing effects are facilitated, the appearance molded lines of the product are attractive and elegant, the volume ratio of each cavity is further optimized, the volumes of the silencers are the same, the different aspect ratios have influence on insertion loss and power loss of the silencers, and the general recommended range is 1-5; when the aspect ratio is too large, the acoustic characteristic is close to that of an expandable silencer, the expansion is small, and the silencing value is low; the aspect ratio is too small, the acoustic characteristic of the silencer is close to that of a positive displacement resonance silencer, the expansion ratio is also large, the theoretical vertical direction of the aspect ratio in the actual using process of the silencer is 9-18, the actual numerical value of the using process is 26, the effective silencing frequency is narrow, the effective silencing frequency is determined to be 1.42 through continuous verification, the sizes of all cavities are different to ensure that the silencer has a silencing effect at a wide frequency, the maximum volume (theoretically not less than 1-3 times of the total displacement and actually reaching 41% of the effective volume) is adopted for the first cavity of the silencer, airflow pulsation and backpressure are favorably reduced, the silencing effect can be improved to a certain extent, and power loss is reduced. The structure and principle of the above process are as follows:

an elliptical cylinder straight-line silencer for improving the power of a generator of a 5Kw unit comprises a shell 1, wherein a front end baffle 2 is welded at the top of the shell 1, the thicknesses of the front end baffle 2 and a rear end baffle 3 are 1mm, the thicknesses of a reinforcing plate and a supporting part on the inner side of the shell 1 are both 1mm, the thickness of a part plate of an inner side structure of the shell 1 is 0.8mm, and a pi-shaped lug is arranged on the inner side of the shell 1 and improves the thickness of the part plate of the pi-shaped lug;

the inner wall of the shell 1 is welded with a second air inlet partition plate 5, the inner wall of the second air inlet partition plate 5 is provided with an air vent 8, the inner wall of the second air inlet partition plate 5 is movably connected with a vent pipe 7, the aperture of the vent pipe 7 is phi 30, the sectional area of the vent pipe 7 is close to that of the silencer 20, the inner diameter of the vent pipe 7 is larger than that of the vent pipe 6, and the sectional area of the vent pipe 7 is larger than that of the vent pipe 6, so that the average air flow velocity in the silencer is effectively reduced and is not more than 50m/s, and impedance change is caused in the sound transmission process to generate reflection and interference of sound energy, thereby reducing the sound energy radiated outwards and achieving the purpose of better silencing;

when the intake pipe 10 exhausts to the inboard cavity of casing 1, the air guide that admits air of having considered the air current direction in the design, with high-temperature gas drainage to the lower part and the outside of well cavity, lower part customer uses the product difficult touching, the outside has the guard shield to shelter from, has also avoided the whole or large tracts of land high temperature of muffler simultaneously, has reduced safety and to motor position amount heat radiation, has improved complete machine product heat engine continuous operation power.

In summary, as shown in fig. 1-4, an elliptic cylinder straight-line silencer for improving power of a generator of a 5Kw unit includes a casing 1, a front end baffle 2 is welded at the top of the casing 1, the thicknesses of the front end baffle 2 and a rear end baffle 3 are 1mm, the thicknesses of a reinforcing plate and a supporting part on the inner side of the casing 1 are both 1mm, the thickness of a part plate of the inner side structure of the casing 1 is 0.8mm, a pi journal stirrup is installed on the inner side of the casing 1, the thickness of the part plate of the pi journal stirrup is improved, and the structure of the casing 1 of the silencer is strengthened: the sound radiation is one of sound transmission ways of the silencer, the structure of the inner side of the shell 1 is strengthened, the thickness of the shell is increased, the strength of each part of the product is improved, and the sound radiation effect of the shell can be reduced;

the front end baffle plate 2, the rear end baffle plate 3, the first air inlet baffle plate 4 and the second air inlet baffle plate 5 are made of the same material and are made of steel, an air inlet hole 9 is formed in the inner wall of the front end baffle plate 2, the rear end baffle plate 3 is welded at the bottom of the shell 1, an exhaust pipe 6 is welded on the inner wall of the rear end baffle plate 3, an air inlet pipe 10 is movably connected to the inner wall of the front end baffle plate 2, the air inlet pipe 10 penetrates through the front end baffle plate 2, the first air inlet baffle plate 4 and the second air inlet baffle plate 5, the first air inlet baffle plate 4 is welded on the inner wall of the shell 1, the distance between the first air inlet baffle plate 4 and the second air inlet baffle plate 5 is larger than the distance between the front end baffle plate 2 and the second air inlet baffle plate 5, the distance between the first air inlet baffle plate 4 and the second air inlet baffle plate 5 is larger than the distance between the rear end baffle plate 3 and the first air inlet baffle plate 4, when air enters through the air inlet baffle plate of the silencer, the effective volume of the cavity is effectively increased, and the front end cover is a conventional product, the bosses of the front end cover and the rear end cover are deepened by 5mm respectively, the effective volume of the cavity is effectively increased, the power improvement and the noise reduction effect are facilitated, the appearance molded line of the commodity is attractive and elegant, and the volume ratio of each cavity is further optimized;

the inner wall of the shell 1 is welded with an air inlet baffle plate II 5, the inner wall of the air inlet baffle plate II 5 is provided with a vent hole 8, the inner wall of the air inlet baffle plate II 5 is movably connected with a vent pipe 7, the aperture of the vent pipe 7 is phi 30, the sectional area of the vent pipe 7 is close to the sectional area of the silencer 20, the inner diameter of the vent pipe 7 is larger than the inner diameter of the exhaust pipe 6, the sectional area of the vent pipe 7 is larger than the sectional area of the exhaust pipe 6, the aperture phi 30 and the vent area of the vent hole 9 of the air inlet baffle plate, the pipe diameter phi 30 of the vent pipe 7 is 1.0, the inner diameter D28, the sectional area is close to the pipe diameter phi 32 of the main air inlet pipe 10 of the silencer, the sectional area is 1.0, the pipe diameter phi 28 of the final exhaust pipe 6 is 1.0, and the sectional area of the inner diameter D26, the sectional area of each cavity airflow circulation pipe or hole is gradually reduced, but is not lower than the outlet sectional area of the silencer finally, thus, the section of the pipeline is gradually reduced by sudden change and gradual reduction, the speed of the average airflow in the silencer is effectively reduced to be not more than 50m/s, and impedance change is caused in the sound transmission process to generate reflection and interference of sound energy, so that the sound energy radiated outwards is reduced, and the aim of better silencing is fulfilled;

The change is made to the existing silencer, the tail gas enters the silencer, passes through the air inlet pipe 10 of the silencer, then sequentially passes through the air inlet partition plate I4 and the air inlet partition plate II 5 along the air inlet pipe 10, the change of the volume ratio of the cavity body at the inner side of the silencer is realized by utilizing the optimization of the air inlet pipe 10 and the change of the distance between the air inlet partition plate I4 and the air inlet partition plate II 5, compared with the prior art, the effective volume is optimized, the sectional area of the airflow circulating pipe or hole of each cavity is gradually reduced, but not lower than the sectional area of the outlet of the silencer, therefore, the speed of the average airflow in the silencer is effectively reduced by the sudden change and the gradual reduction of the section of the pipeline, the finally discharged tail gas is discharged through the guiding function of the exhaust pipe 6, the temperature of the discharged air can be gradually dissipated at the inner side of the silencer under the action of the silencer, and the use of the silencer can not be scalded by the shell body of the silencer, the use of the silencer is optimized, and meanwhile, parts and components on the inner side of the silencer are correspondingly optimized, so that the hardness of the silencer is correspondingly increased, the service life of the silencer is prolonged, the thickness of a shell is increased, the strength of each part of a product is improved, and the sound radiation effect of the shell is reduced.

The process is as shown in fig. 2, the effective volume of the chamber is increased, the effective volume of the chamber is prevented from being reduced and the exhaust of the inner chamber is prevented from being blocked, the heat dissipation performance is poor, the temperature is prevented from being too high, the continuous running power reduction of an engine is avoided, the power improvement and the silencing effect are facilitated, the volume ratio of each chamber is optimized, the average airflow speed of the silencer is reduced, the ventilation pipe and the ventilation aperture are optimized, the exhaust smoothness of each chamber is improved, the shell structure of the silencer is strengthened, the acoustic radiation is reduced, the exhaust diversion and heat insulation of the air inlet pipe are increased, the integral or large-area temperature of the silencer is prevented from being too high, the pore punching processing manufacturability of the inner side chamber partition plate is optimized, the high-temperature gas exhausted from the air inlet pipe is avoided being caused, the diversion structure is avoided, the inside of the whole chamber is prevented from being directly overflowed, and the temperature of the rear part and the surface of the silencer is prevented from being higher.

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

Claims

1. The utility model provides a make straight row muffler of oval barrel of 5Kw unit generator power promotion, includes casing (1), its characterized in that: the welding of the top of casing (1) has front end baffle (2), the inner wall of front end baffle (2) has been seted up inlet port (9), the welding of the bottom of casing (1) has rear end baffle (3), the welding of the inner wall of rear end baffle (3) has blast pipe (6), the inner wall swing joint of front end baffle (2) has intake pipe (10), the welding of the inner wall of casing (1) has inlet baffle one (4), the welding of the inner wall of casing (1) has inlet baffle two (5), the inner wall of inlet baffle two (5) has been seted up air vent (8), the inner wall swing joint of inlet baffle two (5) has breather pipe (7).

2. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the front end baffle (2), the rear end baffle (3), the first air inlet baffle (4) and the second air inlet baffle (5) are made of the same steel material.

3. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the air inlet pipe (10) penetrates through the front end partition plate (2), the first air inlet partition plate (4) and the second air inlet partition plate (5).

4. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the diameter of the vent pipe (7) is phi 30, and the cross section area of the vent pipe (7) is close to that of the silencer (20).

5. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the inner diameter of the vent pipe (7) is larger than that of the exhaust pipe (6), and the cross-sectional area of the vent pipe (7) is larger than that of the exhaust pipe (6).

6. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the inner side of the shell (1) is provided with the pi support lug, and the plate thickness of parts of the pi support lug is improved.

7. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the distance between the first air inlet partition plate (4) and the second air inlet partition plate (5) is larger than the distance between the front end partition plate (2) and the second air inlet partition plate (5).

8. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the distance between the first air inlet partition plate (4) and the second air inlet partition plate (5) is larger than the distance between the rear end partition plate (3) and the first air inlet partition plate (4).

9. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the thickness of the front end baffle plate (2) and the rear end baffle plate (3) is 1mm, and the thickness of the reinforcing plate and the thickness of the supporting parts on the inner side of the shell (1) are both 1 mm.

10. The elliptical cylinder inline muffler for boosting power of a 5Kw unit generator set according to claim 1, wherein: the thickness of the structural part plate on the inner side of the shell (1) is 0.8 mm.