Silencing device of diesel generator

Abstract

The invention relates to the technical field of silencing devices, in particular to a silencing device of a diesel generator. The silencer comprises a shell and a silencer body installed on the inner side of the shell. The air inlet end of the silencer is communicated with the exhaust end of the diesel generator; a front silencing assembly for primary silencing, a middle silencing assembly for secondary silencing after primary silencing and a rear silencing assembly for tertiary silencing after silencing of the middle silencing assembly are sequentially arranged in the silencer in the exhaust direction. The front silencing assembly comprises an air inlet cavity and an amplification cavity. The inner wall of the air inlet cavity and the inner wall of the amplification cavity are covered with sound absorption materials. The air inlet cavity is cylindrical; the amplification cavity is communicated with the air outlet end of the air inlet cavity, and the inner diameter of the amplification cavity is gradually increased in the air flowing direction; and silencing holes are formed in the inner wall of the amplification cavity, and elastic bodies are rotationally mounted in the silencing holes.

Description

Technical Field

[0001] The invention relates to the technical field of silencer devices, and in particular to a silencer device for a diesel generator. Background Art

[0002] At construction sites such as building construction, road and bridge construction, and water conservancy and hydropower projects, electricity demand is temporary and uncertain. Diesel generators are easy to move and install, and can be adjusted at any time according to the progress of the project to provide electricity for construction equipment, lighting, offices, etc. When the construction site is close to the highway, the addition of traffic noise will make the entire environmental noise more complicated. Traffic noise contains sounds of various frequencies and intensities, such as the roar of car engines, the friction between tires and the road surface, etc. These noises will be mixed with the noise of diesel generators, requiring the silencer to have a better silencing effect to weaken the mixed noise.

[0003] The invention patent with application number CN202210456569.3 discloses an air intake and exhaust silencer for a diesel generator, including a generator box and a mounting slot, wherein a telescopic frame is fixedly connected inside the mounting slot, a rack plate is arranged on the side of the telescopic frame, filters are fixedly connected at both ends of the generator box, a sealing ring is arranged on the top of the generator box, and the tops of both sides of the inner wall of the generator box are fixedly connected to limit frames, and protective plates are fixedly connected to the sides of the limit frames. The above invention can realize efficient cleaning operation of the overall silencer position of the diesel generator through the generator box, mounting slot, telescopic frame, rack plate, top cover and rotating gear. In actual use, the staff first pulls the top cover as a whole through the contraction slot for stable lifting operation. During the lifting process, the rotating gears of the exhaust frame and the air intake frame close to the generator box can be stably meshed with the rack plate on one side of the telescopic frame.

[0004] However, this patent only uses sound-absorbing cotton panels for sound reduction, and the sound reduction effect is limited.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0006] The object of the present invention is to provide a diesel generator silencer which can effectively solve the above-mentioned technical problems.

[0007] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0008] A muffler device for a diesel generator comprises: a housing, and a muffler installed inside the housing; an air inlet end of the muffler is connected to an exhaust end of the diesel generator;

[0009] The interior of the muffler is provided with: a front muffler component for preliminary muffler, a middle muffler component for secondary muffler after preliminary muffler, and a rear muffler component for tertiary muffler after muffler of the middle muffler component;

[0010] The front muffler assembly comprises: an air inlet cavity and an amplifying cavity; the inner walls of the air inlet cavity and the amplifying cavity are covered with sound absorbing materials; the air inlet cavity is cylindrical; the amplifying cavity is connected to the air outlet end of the air inlet cavity, and the inner diameter of the amplifying cavity gradually increases along the gas flow direction;

[0011] A silencer hole is provided on the inner wall of the amplifying chamber, and an elastic body is rotatably installed in the silencer hole.

[0012] Further, the elastic body includes: a thick elastic body for absorbing low-frequency noise, and a thin elastic body for absorbing high-frequency noise;

[0013] The thin elastic body is provided with a sound absorbing groove.

[0014] Furthermore, the middle silencer assembly comprises: a first shell, the air inlet end of the first shell is connected to the air outlet end of the amplifying chamber, and a silencer material is installed on the inner wall of the first shell;

[0015] An arc-shaped filter screen is installed at the air inlet end of the first shell; a guide block is installed in the middle of the air inlet end of the first shell; the guide block is slidably connected with a swing member; and a passage for gas to pass through is opened in the middle of the swing member.

[0016] Furthermore, the swinging member includes: a connecting pipe coaxially slidably connected to the guide block; curved pipes are sequentially installed on the connecting pipe along the axial direction, and a sealing block is fixedly installed on the other end of the connecting pipe.

[0017] Furthermore, the plurality of bent pipes and the connecting pipes form a tree structure.

[0018] Furthermore, a beating and cleaning member for beating and cleaning the arc-shaped filter screen is installed on the connecting pipe;

[0019] The beating cleaning member comprises: a connecting sleeve coaxially connected to the connecting pipe, a mounting plate fixedly mounted on the connecting sleeve, and a flexible body mounted on the mounting plate.

[0020] Furthermore, the rear silencer assembly includes: a second shell, a mounting rod coaxially mounted on the second shell, and a plurality of silencers sequentially mounted inside the second shell; the silencers are rotatably connected to the mounting rod; and the silencers are respectively used to silence noises of different frequencies.

[0021] Furthermore, the mounting plate includes: an outer mounting plate, an inner mounting plate slidably connected to the outer mounting plate, and a spring installed between the outer mounting plate and the inner mounting plate.

[0022] Furthermore, an arc-shaped elastic sheet is installed at one end of the installation rod close to the sealing block; the convex surface of the elastic sheet faces the sealing block.

[0023] Furthermore, the concave surface of the elastic sheet is connected with an elastic block.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the front silencer assembly of the present invention preliminarily weakens the noise, reducing the burden on the middle silencer assembly; the middle silencer assembly further reduces the noise intensity after receiving the preliminarily processed airflow; finally, the rear silencer assembly performs the final elimination of the remaining noise, ensuring that the exhaust gas noise reaches a lower level. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 This is a schematic structural diagram of a diesel generator silencer device of the present invention installed on a diesel generator;

[0027] Figure 2 It is a structural schematic diagram of a muffler device for a diesel generator of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of a muffler device for a diesel generator according to the present invention;

[0029] Figure 4 for Figure 3 A partial enlarged view of part A;

[0030] Figure 5 for Figure 4 A partial enlarged view of part B;

[0031] Figure 6 The figure is a schematic diagram of the internal structure of a muffler device for a diesel generator according to the present invention.

[0032] In the figure: 1, shell; 2, silencer; 21, front silencer assembly; 22, middle silencer assembly; 23, rear silencer assembly; 211, air inlet chamber; 212, amplification chamber; 2121, silencer hole; 2122, elastic body; 221, first shell; 222, arc filter; 223, guide block; 224, swing member; 2241, connecting pipe; 2242, elbow; 2243, sealing block; 2244, beating cleaning member; 22441, connecting sleeve; 22442, mounting plate; 22443, flexible body; 231, second shell; 232, mounting rod; 233, silencer; 234, limit block; 235, elastic sheet; 236, elastic block. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0034] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] like Figures 1 to 6 As shown, a silencer device for a diesel generator of the present invention comprises: a housing 1 installed on the diesel generator, a silencer 2 installed on the inner side of the housing 1, a smoke inlet pipe connected to the air inlet end of the silencer 2, and a smoke outlet pipe connected to the air outlet end of the silencer 2; the smoke inlet pipe is connected to the exhaust end of the diesel generator.

[0036] The interior of the muffler 2 includes: a front muffler component 21 for primary muffler, a middle muffler component 22 for diverting the exhaust gas and performing secondary muffler after the primary muffler, and a rear muffler component 23 for tertiary muffler after the middle muffler component 22.

[0037] The front muffler assembly 21 includes: an air intake chamber 211 for absorbing low-frequency noise and an amplifying chamber 212 for absorbing high-frequency noise, which are connected in sequence; the inner walls of the air intake chamber 211 and the amplifying chamber 212 are covered with sound-absorbing materials; the air intake chamber 211 is connected to the air outlet end of the smoke inlet pipe, and the air intake chamber 211 is cylindrical; the amplifying chamber 212 is connected to the air outlet end of the air intake chamber 211, and the inner diameter of the amplifying chamber 212 gradually increases along the gas flow direction, so that when the air flow flows from the air intake chamber 211 to the amplifying chamber 212, the flow velocity decreases, and the air flow from the air intake chamber 211 to the amplifying chamber 212 decreases. And it plays a role of silencing; a silencing hole 2121 is opened on the inner wall of the amplifying chamber 212, and an elastic body 2122 is rotatably installed in the silencing hole 2121. When air flows, the elastic body 2122 is driven to vibrate and rotate along the silencing hole 2121, and resonance is formed; the elastic body 2122 is composed of a thick elastic body 2122 and a thin elastic body 2122; a sound-absorbing groove is opened on the thin elastic body 2122; the thick elastic body 2122 is used to reduce low-frequency noise, and the thin elastic body 2122 is used to reduce high-frequency noise.

[0038] The middle silencer assembly 22 includes: a first shell 221, the air inlet end of the first shell 221 is connected to the air outlet end of the amplification chamber 212, and the inner wall of the first shell 221 is installed with silencer material, an arc-shaped filter screen 222 fixedly installed on the air inlet end of the first shell 221, and a guide block 223 fixedly installed in the middle of the air inlet end of the first shell 221, the guide block 223 is cylindrical, and a swing member 224 is coaxially slidably installed on the guide block 223; a passage for gas to pass through is opened in the middle of the swing member 224.

[0039] The swinging member 224 includes: a connecting tube 2241 coaxially slidably connected to the guide block 223, a bent tube 2242 sequentially installed on the side wall of the connecting tube 2241 along the axial direction of the connecting tube 2241, and a sealing block 2243 fixedly installed on the air outlet end of the connecting tube 2241; a cylindrical through hole is coaxially opened in the middle of the guide block 223, a spherical guide block 223 is fixedly connected to the inner wall of the cylindrical through hole, a reciprocating groove is opened on the outer wall of the connecting tube 2241, and the reciprocating groove is slidably connected to the spherical guide block 223.

[0040] The bend pipe 2242 is in the shape of a tree branch and gradually bends outward from the connecting pipe 2241. Multiple bend pipes 2242 are connected to the connecting pipe 2241 to form a tree-like structure that gradually diverts the gas, which helps to divert the gas and reduce the flow rate; the bend pipe 2242 is connected to the connecting pipe 2241, and the air outlet end of the bend pipe 2242 faces the air inlet end of the first shell 221.

[0041] A beating cleaning member 2244 is also installed on one end of the connecting pipe 2241 close to the front silencer assembly 21. The beating cleaning member 2244 includes: a connecting sleeve 22441 coaxially connected to the connecting pipe 2241, a mounting plate 22442 fixedly mounted on the connecting sleeve 22441, and a flexible body 22443 uniformly mounted on the mounting plate 22442 in an array. The flexible body 22443 is strip-shaped and made of flexible materials such as rubber or silicone. The beating cleaning member 2244 is driven to move axially by the axial movement of the connecting pipe 2241. During the movement, the arc filter screen 222 can be beaten to make the arc filter screen The loose impurities on 222 fall off, and the surface of the curved filter 222 is preliminarily cleaned to ensure the overall cleanliness of the filter; at the same time, during the beating process, the flexible body 22443 plays a buffering role on the one hand, and on the other hand, the soft characteristics of the flexible body 22443 prevent it from scratching or damaging the filter when inserted into the pores of the curved filter 222, so that it can gently contact the surface and pore walls of the curved filter 222 during the cleaning process, which can effectively clean and protect the curved filter 222; through the setting of the beating cleaning member 2244, double cleaning can be performed to achieve a better cleaning effect.

[0042] When the gas flows from the amplifying chamber 212 to the connecting tube 2241, the high-speed flowing gas drives the connecting tube 2241 to rotate. Due to the limiting effect of the guide block 223, the connecting tube 2241 rotates while moving axially along the guide block 223. During the rotation process, the connecting tube 2241 drives the beating cleaning member 2244 to intermittently scan and beat the arc filter screen 222, and the flexible body 22443 thereon squeezes the mesh of the arc filter screen 222 during the process of beating the arc filter screen 222. During the axial movement of the guide block 223, the sealing block 2243 is driven to intermittently seal the first The gas outlet end of a shell 221 allows the gas to be intermittently discharged to the rear silencer assembly 23. Intermittent exhaust can effectively control the outflow rate of the gas, avoid noise echoes or pressure fluctuations caused by excessive airflow, thereby improving the silencer effect, and the residence time of the gas in the first shell 221 is increased, which is conducive to the contact with the silencer material, thereby enhancing the attenuation effect of the sound wave; in this process, the gas flows from the connecting pipe 2241 to the elbow 2242, and is discharged from the gas outlet end of the elbow 2242 to the gas inlet end of the first shell 221, colliding with the gas passing through the arc filter 222, thereby weakening the gas flow rate.

[0043] The rear silencer assembly 23 includes: a second shell 231, a mounting rod 232 coaxially mounted on the second shell 231, and a silencer 233 sequentially mounted inside the second shell 231. The silencer 233 is rotatably mounted on the mounting rod 232, and a limiting block 234 is installed on the side of the silencer 233 facing the air outlet end of the second shell 231 to limit the rotation of the silencer 233; a plurality of silencers 233 are respectively used to silence noises of different frequencies.

[0044] When the silencer 233 needs to be removed, the mounting rod 232 is pulled at the air outlet end of the second shell 231, and the silencer 233 bends when in contact with the air outlet end of the second shell 231, thereby facilitating removal. After removal, the silencer 233 can be cleaned or replaced.

[0045] An arc-shaped elastic sheet 235 is installed at one end of the mounting rod 232 close to the sealing block 2243, and the concave surface of the elastic sheet 235 is connected to the elastic block 236; the convex surface of the elastic sheet 235 faces the sealing block 2243, and when the sealing block 2243 slides, it squeezes the elastic sheet 235, causing the elastic sheet 235 to deform, thereby intermittently and continuously changing the direction of the airflow, and allowing the airflow to flow more smoothly to the silencer 233. The exhaust gas discharged by the diesel generator usually has a certain speed and turbulence. Direct impact on the silencer material may cause uneven airflow distribution. The arc plate can guide the airflow into a smoother flow state, reduce the generation of turbulence, and allow the exhaust gas to pass through the silencer material more evenly, thereby improving the utilization rate of the silencer material; the elastic block 236 is used to help the elastic sheet 235 reset.

[0046] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0047] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A muffler for a diesel generator, characterized in that: include: A housing, and a muffler installed inside the housing; the air inlet end of the muffler is connected to the exhaust end of the diesel generator; The interior of the muffler is provided with: a front muffler component for preliminary muffler, a middle muffler component for secondary muffler after preliminary muffler, and a rear muffler component for tertiary muffler after muffler of the middle muffler component; The front muffler assembly comprises: an air inlet cavity and an amplifying cavity; the inner walls of the air inlet cavity and the amplifying cavity are covered with sound absorbing materials; the air inlet cavity is cylindrical; the amplifying cavity is connected to the air outlet end of the air inlet cavity, and the inner diameter of the amplifying cavity gradually increases along the gas flow direction; A silencer hole is provided on the inner wall of the amplifying chamber, and an elastic body is rotatably installed in the silencer hole.

2. A diesel generator silencer as claimed in claim 1, characterized in that: The elastic body comprises: a thick elastic body for absorbing low-frequency noise and a thin elastic body for absorbing high-frequency noise; The thin elastic body is provided with a sound absorbing groove.

3. A diesel generator silencer as claimed in claim 1, characterized in that: The middle silencer assembly comprises: a first shell, the air inlet end of the first shell is connected with the air outlet end of the amplifying chamber, and a silencer material is installed on the inner wall of the first shell; An arc-shaped filter screen is installed at the air inlet end of the first shell; a guide block is installed in the middle of the air inlet end of the first shell; the guide block is slidably connected with a swing member; and a passage for gas to pass through is opened in the middle of the swing member.

4. A diesel generator silencer as claimed in claim 3, characterized in that: The swinging member comprises: a connecting pipe coaxially connected to the guide block in sliding manner; curved pipes are sequentially installed on the connecting pipe along the axial direction, and a sealing block is fixedly installed on the other end of the connecting pipe.

5. A diesel generator silencer as claimed in claim 4, characterized in that: The plurality of bent pipes and the connecting pipe form a tree structure.

6. A diesel generator silencer as claimed in claim 4, characterized in that: The connecting pipe is also provided with a beating and cleaning member for beating and cleaning the arc-shaped filter screen; The beating cleaning member comprises: a connecting sleeve coaxially connected to the connecting pipe, a mounting plate fixedly mounted on the connecting sleeve, and a flexible body mounted on the mounting plate.

7. A diesel generator silencer as claimed in claim 6, characterized in that: The rear silencer assembly includes: a second shell, a mounting rod coaxially mounted on the second shell, and a plurality of silencers sequentially mounted inside the second shell; the silencers are rotatably connected to the mounting rod; and the silencers are respectively used to silence noises of different frequencies.

8. A diesel generator silencer as claimed in claim 6, characterized in that: The mounting plate comprises: an outer mounting plate, an inner mounting plate slidably connected to the outer mounting plate, and a spring mounted between the outer mounting plate and the inner mounting plate.

9. A diesel generator silencer as claimed in claim 7, characterized in that: An arc-shaped elastic sheet is installed at one end of the installation rod close to the sealing block; the convex surface of the elastic sheet faces the sealing block.

10. A diesel generator silencer as claimed in claim 9, characterized in that: The concave surface of the elastic sheet is connected with an elastic block.

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