CN211397814U

CN211397814U - Silencer

Info

Publication number: CN211397814U
Application number: CN201922272343.4U
Authority: CN
Inventors: 林帮法
Original assignee: ZHEJIANG AUARITA PNEUMATIC TOOLS LLC
Current assignee: ZHEJIANG AUARITA PNEUMATIC TOOLS LLC
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-01
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a silencer, including pedestal and lid, be provided with the air inlet on the lid, be provided with the gas outlet on the pedestal, install air filter between pedestal and the lid, still include the baffle, form the amortization chamber between baffle and the lid inner, the amortization intracavity is provided with the amortization passageway of buckling many times, has seted up the intercommunication mouth on the baffle, the outer end intercommunication of air inlet and amortization passageway, the inner intercommunication of intercommunication mouth and amortization passageway, the air that gets into the amortization intracavity flows from the intercommunication mouth, discharges from the gas outlet behind air filter. The silencer has good silencing and filtering effects, and meanwhile, the ventilation quantity is large, and the air inlet resistance is small.

Description

Silencer

Technical Field

The utility model relates to an air compressor machine accessory technical field, in particular to muffler.

Background

A silencer is a device installed in an intake system of an air power apparatus such as an air compressor, for reducing noise and filtering air. The outside air enters the aerodynamic equipment through the silencer, and the silencer weakens the air inlet noise and filters the air entering the aerodynamic equipment. Most set up some amortization structures in the present muffler, make the sound wave produce repeated refraction in the muffler, and then make the amplitude between the sound wave offset each other to reach the effect of amortization, also need set up filtration simultaneously. The whole volume size of muffler can receive certain restriction in the in-service use in-process for the inside volume of muffler is limited, how to set up amortization, filtration rationally in limited space, and guarantees that the air input of muffler is the main problem in the muffler design process.

Like patent No. 201721237284.1, the chinese patent who is the name of a muffler shows, the inside baffle that is provided with of muffler, the baffle divide into first cavity and second cavity with the muffler inner chamber, and the intake pipe sets up in the cover side, and the direction of admitting air sets up with the internal perisporium tangential of first cavity, and first cavity intussuseption is filled with the filter pulp, sets up the air current hole of the first cavity of intercommunication and second cavity on the baffle. When outside air enters the first cavity through the air inlet pipe, air flow generates circulation along the inner wall of the first cavity, meanwhile, a part of air flow axially enters the second cavity, and multiple turning-back is generated between the inner walls of the second cavity, so that the noise reduction effect is achieved. Although the arrangement can play a certain role in filtering and silencing, the first chamber is filled with the filter cotton, so that the air inlet resistance is large. Meanwhile, the length of the flow channel in the second chamber is short, the two sides of the inner wall are flat, the reflection times of the sound waves are few, the amplitude between the sound waves is not fully offset, and the silencing effect is poor.

Chinese patent No. 201720341389.5 discloses an air compressor silencer, including casing and lid, installs the amortization core between casing and the lid, and in the intake pipe stretched into the lid from the lid outside, the air entered into the lid from the intake pipe, and the air flowed away toward the shells inner wall direction after bypassing sealed lid, then filtered and the amortization through the amortization core. Although this muffler can play certain amortization and filtering action, mainly absorb the sound wave through filter paper during the amortization, filter paper is only the cladding at the filter screen skin, and the number of piles is less, uses the muffler of this structure, and the noise cancelling effect is also not ideal.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a muffler has better amortization and filter effect, and the resistance of admitting air is less, and the air capacity is great.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a silencer, includes pedestal and lid, is provided with the air inlet on the lid, is provided with the gas outlet on the pedestal, installs air filter between pedestal and the lid, still includes the baffle, forms the amortization chamber between baffle and the lid inner, is provided with the amortization passageway of buckling many times in the amortization intracavity, has seted up the intercommunication mouth on the baffle, the outer end intercommunication of air inlet and amortization passageway, the inner intercommunication of intercommunication mouth and amortization passageway, the air that gets into the amortization intracavity flows from the intercommunication mouth, discharge from the gas outlet behind air filter.

Through above-mentioned technical scheme, set up the amortization passageway of buckling in the amortization intracavity for noise that produces in the process of breathing in can carry out repeated reflection and offset in the amortization passageway, and noise reduction volume plays better noise cancelling effect. The setting of baffle can be separated sound-deadening chamber and air filter for inspiratory air enters into the sound-deadening intracavity earlier and carries out the amortization, and then passes through air filter again, the suction of the air of being convenient for, and the air intake resistance is less, and the air volume will be great, also can guarantee the cleanliness factor of gas outlet exhaust air simultaneously.

Preferably, the silencing passage comprises a plurality of branch passages, the branch passages are radially arranged, and the end parts of two adjacent branch passages are communicated.

Through above-mentioned technical scheme, through set up a plurality of branch passageways in the amortization intracavity to make the amortization passageway have more buckles, increase the reflection and the refraction number of times of noise in the amortization passageway, improve noise cancelling effect.

Preferably, a plurality of guide plates are arranged on the inner end face of the cover body, the branch channel is located between two adjacent guide plates, an arc-shaped seat is arranged in the middle of the silencing cavity, and the inner end of each guide plate is connected with the arc-shaped seat or the outer end of each guide plate is connected with the side wall of the cover body.

Through the technical scheme, the branch channel can be conveniently formed between the two adjacent guide plates, the two adjacent branch channels are communicated, the bent silencing channel is formed, and therefore noise reduction is achieved.

Preferably, the two sides of the guide plate are provided with blocking plates.

Through above-mentioned technical scheme, the setting of arresting barrier can increase the quantity of buckling of amortization passageway, increases the plane of reflection of sound to increase the emergence and the refraction number of times of sound wave when propagating along the amortization passageway, thereby the volume of noise abatement.

Preferably, the outer end of the guide plate, the inner end of which is connected with the arc-shaped seat, is provided with a U-shaped part, and the opening of the U-shaped part faces the outer side of the cover body.

Through above-mentioned technical scheme, the degree of buckling of increase amortization passageway that U-shaped portion set up can be further increases the quantity of buckling to improve the noise cancelling effect.

Preferably, the air inlet is opposite to the U-shaped part, and two sides of the U-shaped part are provided with branch channels.

Through above-mentioned technical scheme, air inlet and U-shaped portion set up like this for in the air in the lid outside enters into the lid, can divide into two, with the airflow that reduces on every branch flow path, reduce the air resistance, increase the bending and the reflection number of times of amortization runner, make the sound wave take place to offset each other as far as possible, thereby improve the noise cancelling effect.

Preferably, the number of the air inlets is plural.

Through above-mentioned technical scheme, through setting up a plurality of air inlets, increase the area of admitting air on the one hand, increase the maximum air input of this muffler, on the other hand, through setting up a plurality of air inlets, can reduce the air input of every air inlet to the noise that produces when reducing to admit air. The number of the air inlets is multiple, and the number of the air inlets comprises two air inlets, three air inlets and more air inlets.

Preferably, a filter cotton is arranged between the air inlet and the U-shaped part opposite to the air inlet.

Through above-mentioned technical scheme, the setting of filter pulp can carry out the prefilter to the air that enters into the amortization intracavity in air inlet department to improve the cleanliness of air. Meanwhile, the thickness of the filter cotton at the position is small, only primary filtration is carried out on the inlet air, and great influence on the inlet air cannot be generated.

Preferably, a sealing gasket is arranged between the end face of the guide plate and the partition plate.

Through above-mentioned technical scheme, sealed pad is generally made by elastic material such as rubber, silica gel, has better sealing performance when compressing tightly for the air current can not leak between amortization runner and the baffle. The sealing gasket is made of rubber, silica gel and other materials, and has a good sound insulation effect, so that noise can be further reduced.

Preferably, a gas collection cavity is formed on the inner side of the arc-shaped seat, the inner end of the silencing passage is communicated with the gas collection cavity, a ventilation groove is formed in the position, right opposite to the gas collection cavity, of the partition board, the ventilation groove is close to one side of the air filter element, and the communication port is formed in the side face of the ventilation groove.

Through the technical scheme, air in the air collection cavity can smoothly enter the ventilation groove and enter the other side of the partition plate through the communication port on the side surface of the ventilation groove. The communicating opening is formed in the position, so that airflow can flow radially after passing through the partition plate, and the distribution is more uniform.

Compared with the prior art, the beneficial effects of the utility model are that: through the redesign to amortization passageway structure for the noise can carry out abundant reflection and refraction in the amortization passageway, thereby makes between the sound wave offset each other, thereby effectively reduces the noise volume.

Drawings

FIG. 1 is an exploded view of an embodiment;

FIG. 2 is a schematic cross-sectional view of an embodiment;

FIG. 3 is a schematic cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a schematic structural view of the inner side of the cover in the embodiment;

FIG. 5 is a perspective view of the side of the partition plate facing the sound-deadening chamber in the embodiment;

fig. 6 is a perspective view of the side of the baffle plate facing the air filter cartridge in an embodiment.

Reference numerals: 1. a base body; 2. a cover body; 3. an air inlet; 4. an air outlet; 5. an air filter element; 6. a partition plate; 7. a sound-deadening chamber; 8. a sound deadening passage; 9. a communication port; 10. a branch channel; 11. a baffle; 12. an arc-shaped seat; 13. a damming board; 14. a U-shaped portion; 15. filtering cotton; 16. a gasket; 17. a gas collection cavity; 18. a vent groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

As shown in fig. 1 and 2, a muffler includes a base 1 and a cover 2, wherein the base 1 and the cover 2 are connected by a screw. The air inlet 3 has been seted up on the lid 2, and in the external air entered into lid 2 through air inlet 3, be provided with gas outlet 4 on the pedestal 1, install air filter 5 between pedestal 1 and the lid 2, the air that gets into from air inlet 3 filters through air filter 5, then discharges from gas outlet 4.

A baffle 6 is arranged between the air filter element 5 and the cover body 2, a silencing cavity 7 is formed between the baffle 6 and the inner end of the cover body 2, and the air inlet 3 is communicated with the silencing cavity 7. Be provided with the amortization passageway 8 of buckling many times in the amortization chamber 7, amortization passageway 8 is the labyrinth form, has the bending type many times, and the sound wave can take place many times and refract in amortization passageway 8 to make and offset each other, weaken between the sound wave, thereby reach the effect of noise reduction. The outer end of the silencing passage 8 is communicated with the air inlet 3 arranged on the side wall of the cover body 2, and the inner end of the silencing passage 8 is communicated with the communication port 9 on the partition board 6. The outside air enters the sound-deadening chamber 7 from the air inlet 3, then flows along the sound-deadening passage 8, and finally exits the sound-deadening chamber 7 through the communication port 9 in the partition plate 6.

The inner end face of the cover body 2 is provided with a guide plate 11 and an arc-shaped seat 12, the arc-shaped seat 12 is arranged in the middle of the inner end face of the cover body 2, and the guide plate 11 is radially arranged on the outer side of the arc-shaped seat 12. The inner end of the same guide plate 11 is connected with the outer surface of the arc-shaped seat 12 or the outer end is connected with the inner side surface of the cover body 2. The branch passage 10 is located between two adjacent baffles 11. One end of the two ends of the guide plate 11 is connected with the outer side surface of the arc-shaped seat 12 or the inner wall of the cover body 2, so that the two adjacent branch flow channels 10 can be in a communicated state. The adjacent branch channels 10 are communicated with each other in an end-to-end bending way, so that a bent and snake-shaped silencing channel 8 is formed. The number of the arc-shaped seats 12 is two, and the two arc-shaped seats 12 enclose a gas collecting cavity 17. The outer end of the silencing passage 8 is communicated with the air inlet 3, and the inner end of the silencing passage 8 is communicated with the air collecting cavity 17.

In order to increase the reflection and refraction times of the sound wave when the sound wave is transmitted along the silencing channel 8, the two sides of the guide plate 11 are provided with the blocking plates 13, the blocking plates 13 are arranged along the circumferential direction of the cover body 2, the side surfaces of the blocking plates 13 can form reflecting surfaces, the reflection and refraction times of the sound wave when the sound wave is transmitted along the silencing channel 8 are further increased, and therefore the silencing effect is improved.

In addition, the outer end of the deflector 11, the inner end of which is connected with the arc seat 12, is provided with a U-shaped part 14, and the opening of the U-shaped part 14 faces the outer side of the cover body 2. The provision of U-shaped portion 14 increases the number of bends in sound-deadening passageway 8, thereby increasing the number of reflections and refractions of sound waves as they travel through sound-deadening chamber 7. The ends of the U-shaped portion are also provided with stop plates 13 to further increase the number of reflections and refractions of the sound waves. The number of the air inlets 3 is two, the air inlets 3 are opposite to the U-shaped portion 14, and the two sides of the U-shaped portion 14 are provided with the branch channels 10. After entering the silencing passage 8 from the air inlet 3, the outside air flow can be divided into two branches at the U-shaped part 14, and the two branches enter the branch passages 10 at the two sides of the U-shaped part 14 respectively, and flow to the air collecting chamber 17 at the middle part of the cover body 2 along the silencing passage 8. And a filter cotton 15 is arranged between the air inlet 3 and the U-shaped part 14 opposite to the air inlet, and the filter cotton 15 can filter the airflow entering the silencing cavity 7, so that the cleanliness of the air entering the silencer is improved.

As shown in fig. 5 and 6, the middle of the partition board 6 is provided with a vent groove 18 corresponding to the gas collecting cavity 17, and the vent groove 18 is positioned at one side close to the air filter element 5. The communication ports 9 are arranged on the side surface of the ventilation groove 18, and the number of the communication ports 9 is four, and the communication ports are uniformly distributed along the circumference of the side surface of the ventilation groove 18. When the air in the air collecting chamber 17 flows to the rear side of the partition plate 6, the air firstly enters the ventilating groove 18, then flows from the communication port 9 on the side surface of the ventilating groove 18 along the radial direction, and enters the rear side of the partition plate 6. The vent groove 18 and the communication port 9 are arranged such that the sound waves are reflected again by the bottom surface of the vent groove 18, so that the sound waves are reflected back into the sound-deadening chamber 7. Meanwhile, the air flow enters the rear side of the partition plate 6 along the radial direction, and flows along the radial direction when flowing out of the communication port 9, so that the air can be uniformly distributed on the surface of the air filter element 5 and passes through the air filter element 5. Set up like this, just filter 5 places for air, the air current resistance that produces during the filtration is littleer, and the filter core uses more fully simultaneously, and life is longer.

A sealing gasket 16 is arranged between the guide plate 11 and the partition plate 6, and the sealing gasket 16 is made of rubber or silica gel and the like. The sealing gasket 16 is pressed on the top of the guide plate 11 by the partition plate 6, so that on one hand, the sucked air flow is limited in the silencing cavity 7 and can only enter the ventilation groove 18 through the air collection cavity 17. On the other hand, the sealing gasket 16 is made of rubber or the like, and has good sound insulation and absorption effects, and noise can be reduced to penetrate into the seat body 1 side through the partition plate 6.

In order to facilitate the installation of the silencer on the air compressor and then the packaging of the air compressor, the air outlet 4 is eccentrically arranged on the base body 1. Set up like this for the muffler is installed the back on the cylinder cap of air compressor machine, and the muffler center is located 4 downside of gas outlet, makes the peak of muffler lateral surface not higher than the cylinder cap summit, thereby is convenient for the packing in air compressor machine later stage. In addition, the position of the air outlet 4 can be directly arranged at the center of the seat body 1 without being eccentrically arranged, so that the rotating angle is not particularly adjusted during installation.

The air filter cartridge 5 is prior art and is available directly from commercial sources. The air filter element 5 generally includes a housing, and a filter paper for filtering air is fixed in the housing, and the cross section of the filter paper is arranged in a zigzag shape, so that the filtering area is increased, and a larger ventilation capacity is obtained. Other types of air filter cartridges 5 available on the market can be used for the air filter cartridge 5.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides a silencer, includes pedestal (1) and lid (2), is provided with air inlet (3) on lid (2), is provided with gas outlet (4) on pedestal (1), installs air filter (5), characterized by between pedestal (1) and lid (2): still include baffle (6), form amortization chamber (7) between baffle (6) and lid (2) the inner, be provided with amortization passageway (8) of buckling in amortization chamber (7), intercommunication mouth (9) have been seted up on baffle (6), the outer end intercommunication of air inlet (3) and amortization passageway (8), intercommunication mouth (9) and the inner intercommunication of amortization passageway (8), the air that gets into in amortization chamber (7) flows from intercommunication mouth (9), discharge from gas outlet (4) behind air filter (5).

2. The muffler of claim 1, wherein: the silencing passage (8) comprises a plurality of branch passages (10), the branch passages (10) are radially arranged, and the end parts of two adjacent branch passages (10) are communicated.

3. The muffler of claim 2, wherein: a plurality of guide plates (11) are arranged on the inner end face of the cover body (2), the branch channel (10) is located between two adjacent guide plates (11), an arc-shaped seat (12) is arranged in the middle of the silencing cavity (7), and the inner end of each guide plate (11) is connected with the arc-shaped seat (12) or the outer end of each guide plate (11) is connected with the side wall of the cover body (2).

4. A muffler as claimed in claim 3, wherein: the two sides of the guide plate (11) are provided with baffle plates (13).

5. A muffler as claimed in claim 3, wherein: the outer end of the guide plate (11) with the inner end connected with the arc-shaped seat (12) is provided with a U-shaped part (14), and the opening of the U-shaped part (14) faces the outer side of the cover body (2).

6. The muffler of claim 5, wherein: the air inlet (3) is opposite to the U-shaped part (14), and the two sides of the U-shaped part (14) are provided with branch channels (10).

7. The muffler of claim 6, wherein: a filter cotton (15) is arranged between the air inlet (3) and the U-shaped part (14) which is opposite to the air inlet.

8. The muffler of claim 1, wherein: the number of the air inlets (3) is multiple.

9. The muffler of claim 1, wherein: a sealing gasket (16) is arranged between the end surface of the guide plate (11) and the partition plate (6).

10. A muffler as claimed in claim 3, wherein: the inner side of the arc-shaped seat (12) forms a gas collecting cavity (17), the inner end of the silencing passage (8) is communicated with the gas collecting cavity (17), a ventilating groove (18) is formed at the position, right facing the gas collecting cavity (17), of the partition plate (6), the ventilating groove (18) is close to one side of the air filter element (5), and the communication port (9) is formed in the side face of the ventilating groove (18).