Noise reduction structure of diesel engine

Abstract

The utility model is suitable for the technical field of diesel engines, and provides a diesel engine noise reduction structure which comprises a metal pipe assembled at an exhaust port of a diesel engine body. The noise reduction cylinder is assembled at the air outlet end of the metal pipe, a noise reduction block used for reducing exhaust noise is arranged in the noise reduction cylinder, and a channel allowing airflow to pass through is formed in the noise reduction block; the detachable cylinder cover is arranged at the top of the noise reduction cylinder; the exhaust pipe is assembled at the top of the barrel cover; and the collecting mechanism is used for collecting deposited carbon and is arranged on the metal pipe. The noise reduction structure of the diesel engine has the advantages that reflection and scattering of sound waves can be reduced, and the noise reduction effect can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and in particular relates to a noise reduction structure for a diesel engine. Background Art

[0002] When a diesel engine is in operation, its exhaust system will release a large amount of exhaust gas and generate significant noise. This noise mainly includes mechanical noise caused by the flow of exhaust gas and the vibration of the exhaust system, as well as fluid noise caused by exhaust port expansion and gas ejection. High-intensity noise not only affects the external environment, but also causes serious noise pollution to the driver and surrounding residents, affecting their normal life and work. Therefore, developing a structure that can effectively reduce the exhaust noise of diesel engines is of great significance to improving the driving environment and protecting public health.

[0003] At present, the traditional method of reducing diesel engine exhaust noise mainly includes adding a muffler to the exhaust system or changing the structural design of the exhaust pipe. Among them, the existing muffler structure (exhaust pipe) is mostly welded by metal pipes of different thicknesses, with an empty chamber inside. Although this design can play a silencing role to a certain extent, the noise reduction effect is not ideal and needs to be improved. Utility Model Content

[0004] The utility model provides a diesel engine noise reduction structure, aiming to solve the problem of high noise during operation of the current diesel engine.

[0005] The utility model is implemented as follows: a diesel engine noise reduction structure, a metal tube installed at the exhaust port of the diesel engine body; a noise reduction cylinder installed on the air outlet end of the metal tube, a noise reduction block for reducing exhaust noise is arranged in the noise reduction cylinder, and a channel for airflow to pass through is opened on the noise reduction block; a detachable cylinder cover is arranged on the top of the noise reduction cylinder; an exhaust pipe installed on the top of the cylinder cover; a collecting mechanism for collecting carbon deposits, and the collecting mechanism is arranged on the metal tube.

[0006] Preferably, the collecting mechanism comprises: a sealing threaded sleeve fixed on the metal tube; a threaded tube threadedly mounted on the threaded sleeve, the dust inlet end of the threaded tube being connected to the metal tube; and a metal bottle fixedly mounted on the dust outlet end of the threaded tube.

[0007] Preferably, a sleeve plate is fixedly mounted on the noise reduction tube, a detachable protective cover for shielding the noise reduction tube is arranged on the sleeve plate, and heat dissipation holes are evenly arranged on the protective cover.

[0008] Preferably, a first bolt for fixing the protective cover is threadedly mounted on the sleeve plate, and one end of the first bolt is threadedly connected to the protective cover.

[0009] Preferably, a hook for limiting position is fixedly mounted on the cylinder cover, and a buckle that can be engaged with or separated from the hook is fixedly mounted on the noise reduction cylinder.

[0010] Preferably, a heat dissipation layer and a protective layer for dissipating heat are arranged outside the metal tube, and air pores are evenly arranged on the protective layer.

[0011] Preferably, a noise-reducing baffle is fixed obliquely on the inside of the exhaust pipe, and a plurality of noise-reducing holes are formed on the noise-reducing baffle.

[0012] Preferably, an air outlet adapted to the exhaust pipe is opened on the top of the tube cover, and second bolts are provided on both the exhaust pipe and the metal tube, and the corresponding second bolts are threadedly connected to the noise reduction tube and the tube cover respectively.

[0013] Compared with the related art, the diesel engine noise reduction structure provided by the utility model has the following beneficial effects:

[0014] By assembling a metal pipe at the exhaust port of the diesel engine body, the exhaust of the engine is guided to the noise reduction tube, thereby achieving the guidance of the engine exhaust and providing a convenient opening for the noise reduction tube, so that it can be easily cleaned and maintained in daily use; a noise reduction block is arranged inside the noise reduction tube, and a plurality of irregular channels are opened on the noise reduction block, which allow airflow to pass through and have a certain buffering effect on the passing airflow, thereby reducing the impact noise of the airflow, avoiding the reflection and scattering of sound waves during the propagation process, and achieving the processing of engine exhaust noise reduction; by setting a collection mechanism, including a sealing threaded sleeve fixed on the metal tube, a threaded tube threadedly mounted on the threaded sleeve, and a metal bottle fixedly mounted on the dust outlet end of the threaded tube, the carbon deposits in the metal tube are collected. This design not only improves the practicality and ease of use of the equipment, but also makes the noise reduction structure more perfect; a detachable protective cover for shielding the noise reduction tube is arranged on the sleeve plate, and the setting of the heat dissipation holes can effectively dissipate the heat generated by the engine exhaust inside the protective cover to prevent the temperature inside the protective cover from being too high. At the same time, the protective cover can protect the noise reduction tube from damage by the external environment, and can also prevent people from accidentally touching the noise reduction tube and getting burned; a noise reduction baffle is fixed on the inside of the exhaust pipe, which is used to reduce noise. There are multiple noise reduction holes on the noise reduction baffle. This design can effectively reduce noise, increase the ventilation area of ​​the exhaust pipe, reduce the resistance of air flow, and further reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the main structure of a diesel engine noise reduction structure provided by the utility model;

[0016] Figure 2This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 3 for Figure 2 An enlarged structural diagram of part A shown in FIG.

[0018] Figure 4 It is a structural schematic diagram of the noise reduction cylinder, cylinder cover and sleeve plate in the utility model.

[0019] Figure numerals: 1. diesel engine body; 2. exhaust port; 3. metal pipe; 4. noise reduction cylinder; 5. noise reduction block; 6. channel; 7. cylinder cover; 8. exhaust pipe; 9. threaded sleeve; 10. threaded pipe; 11. metal bottle; 12. sleeve plate; 13. protective cover; 14. first bolt; 15. hook; 16. buckle; 17. heat dissipation layer; 18. protective layer; 19. silencer baffle. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The utility model embodiment provides a diesel engine noise reduction structure, such as Figure 1-4 As shown, the diesel engine noise reduction structure includes: a metal tube 3 installed at the exhaust port 2 of the diesel engine body 1; a noise reduction cylinder 4 installed on the air outlet end of the metal tube 3, wherein a noise reduction block 5 for reducing exhaust noise is arranged in the noise reduction cylinder 4, and a channel 6 for airflow to pass through is opened on the noise reduction block 5; a detachable cylinder cover 7 arranged on the top of the noise reduction cylinder 4; an exhaust pipe 8 installed on the top of the cylinder cover 7; and a collecting mechanism for collecting carbon deposits, wherein the collecting mechanism is arranged on the metal tube 3.

[0023] It should be noted that most existing mufflers (smoke exhaust pipes) are welded from metal pipes of different thicknesses, with a hollow chamber inside. Although this design can absorb some noise, due to the material properties of the metal pipe and the design of the hollow chamber, sound waves are prone to reflection and scattering during propagation, resulting in unsatisfactory noise reduction effects;

[0024] In this embodiment, the metal tube 3 is assembled at the exhaust port 2 of the diesel engine body 1 to guide the exhaust of the engine to the noise reduction tube 4. A noise reduction block 5 is arranged inside the noise reduction tube 4. A plurality of channels 6 are opened on the noise reduction block 5. These channels 6 allow airflow to pass through and at the same time have a certain buffering effect on the passing airflow, thereby reducing the impact noise of the airflow and avoiding the reflection and scattering of sound waves during the propagation process. A detachable tube cover 7 is arranged on the top of the noise reduction tube 4 to provide a convenient opening for the noise reduction tube 4, so that it can be easily cleaned and maintained in daily use. An exhaust pipe 8 is assembled on the top of the tube cover 7 to guide the airflow that has undergone noise reduction treatment to the external environment.

[0025] In a further preferred embodiment of the utility model, the collecting mechanism includes: a sealing threaded sleeve 9 fixed on the metal tube 3; a threaded tube 10 threadedly installed on the threaded sleeve 9, the dust inlet end of the threaded tube 10 is connected to the metal tube 3, and a valve is provided on the threaded tube 10; and a metal bottle 11 fixedly installed on the dust outlet end of the threaded tube 10.

[0026] In this embodiment, the collection mechanism is set to collect carbon deposits in the metal tube 3. The use of the valve can conveniently control the opening and closing of the threaded tube 10. The carbon deposits are collected when the diesel engine body 1 is stopped. The carbon deposits can be shaken off by knocking the metal tube 3. The shaken carbon deposits will enter the threaded tube 10 along the inclined surface inside the metal tube 3, and then fall into the metal bottle 11. The above structure effectively combines the metal tube 3, the threaded tube 10 and the metal bottle 11 together to achieve the collection of carbon deposits. This design not only improves the practicality and ease of use of the equipment, but also makes the noise reduction structure more perfect.

[0027] In a further preferred embodiment of the utility model, a sleeve plate 12 is fixedly sleeved on the noise reduction tube 4, a detachable protective cover 13 for shielding the noise reduction tube 4 is provided on the sleeve plate 12, and heat dissipation holes are evenly opened on the protective cover 13.

[0028] In this embodiment, the protective cover 13 can protect the noise reduction tube 4 from damage by the external environment, and can also prevent people from accidentally touching the noise reduction tube 4 and getting burned. The setting of the heat dissipation holes can effectively dissipate the heat generated inside the protective cover 13 due to engine exhaust, and prevent the temperature inside the protective cover 13 from being too high.

[0029] In a further preferred embodiment of the present invention, a first bolt 14 for fixing the protective cover 13 is threadedly mounted on the sleeve plate 12 , and one end of the first bolt 14 is threadedly connected to the protective cover 13 .

[0030] In this embodiment, the first bolts 14 are provided to fix the protective cover 13 to prevent the protective cover 13 from being displaced and falling off.

[0031] In a further preferred embodiment of the utility model, a hook 15 for limiting position is fixedly mounted on the cylinder cover 7 , and a buckle 16 which can be engaged with or separated from the hook 15 is fixedly mounted on the noise reduction cylinder 4 .

[0032] In this embodiment, the hook 15 and the buckle 16 can be used together to fix the barrel cover 7 to prevent displacement or loosening. In addition, the engagement or separation of the hook 15 and the buckle 16 is simple and convenient, so that the user can easily install or remove the barrel cover 7.

[0033] In a further preferred embodiment of the present invention, a heat dissipation layer 17 and a protective layer 18 for heat dissipation are arranged outside the metal tube 3 , and air pores are evenly arranged on the protective layer 18 .

[0034] In this embodiment, the heat dissipation layer 17 and the protective layer 18 can effectively improve the heat dissipation effect and protect the metal tube 3. The heat dissipation layer 17 can be made of a material with good thermal conductivity, such as aluminum, copper and other metal materials, and is used to quickly conduct the heat in the metal tube 3 to the external environment, thereby reducing the temperature inside the metal tube. The protective layer 18 can be made of a material with good high temperature resistance, corrosion resistance, wear resistance and other properties, such as ceramics, silicon carbide, etc., and is used to protect the metal tube 3 from the influence of the external environment and extend the service life of the metal tube.

[0035] In a further preferred embodiment of the present invention, a noise reducing baffle 19 is fixed obliquely on the inside of the exhaust pipe 8, and a plurality of noise reducing holes are formed on the noise reducing baffle 19.

[0036] In this embodiment, the silencer baffle 19 can effectively reduce noise. The silencer baffle 19 can be made of sound-absorbing materials, such as glass fiber, mineral wool, etc., to absorb and reflect the noise in the exhaust pipe 8, thereby achieving the effect of reducing noise. The design of the silencer hole can increase the ventilation area of ​​the exhaust pipe 8, reduce the resistance to air flow, and further reduce noise.

[0037] In a further preferred embodiment of the utility model, an air outlet adapted to the exhaust pipe 8 is opened on the top of the tube cover 7, and second bolts are provided on the exhaust pipe 8 and the metal tube 3, and the corresponding second bolts are threadedly connected to the noise reduction tube 4 and the tube cover 7 respectively.

[0038] In this embodiment, an outlet that is compatible with the exhaust pipe 8 is opened on the top of the tube cover 7. This design allows the exhaust pipe 8 to discharge gas directly to the external environment. At the same time, the sealing effect of the tube cover 7 prevents external impurities from entering the exhaust pipe 8 and the noise reduction tube 4. The setting of the second bolt can facilitate the installation and disassembly of the exhaust pipe 8 and the metal tube 3. At the same time, the detachability makes maintenance and repair simple and easy.

[0039] In summary, the diesel engine noise reduction structure provided by the technical solution, compared with the existing muffler (exhaust pipe), adopts the design of metal tube 3 and noise reduction tube 4, changes the way of sound wave propagation, reduces the reflection and scattering of sound waves, and thus achieves a more ideal noise reduction effect. At the same time, the irregular channel 6 design on the noise reduction block 5 makes the noise reduction effect more significant.

[0040] Compared with the related art, by assembling a metal tube 3 at the exhaust port 2 of the diesel engine body 1, the exhaust of the engine is guided to the noise reduction tube 4, thereby achieving the guidance of the engine exhaust and providing a convenient opening for the noise reduction tube 4, so that it can be easily cleaned and maintained in daily use; a noise reduction block 5 is arranged inside the noise reduction tube 4, and a plurality of irregular channels 6 are opened on the noise reduction block 5, which allow airflow to pass through and have a certain buffering effect on the passing airflow, thereby reducing the impact noise of the airflow, avoiding the reflection and scattering of sound waves during the propagation process, and achieving the processing of engine exhaust noise reduction; by setting a collection mechanism, including a sealing threaded sleeve 9 fixed on the metal tube 3, a threaded tube 10 threadedly installed on the threaded sleeve 9 and a metal bottle 11 fixedly installed on the dust outlet end of the threaded tube 10, the collection of carbon deposits in the metal tube 3 is achieved. This design not only improves the practicality and usability of the equipment, but also makes the noise reduction structure more perfect; a detachable protective cover 13 for shielding the noise reduction tube 4 is provided on the sleeve plate 12, and the heat dissipation holes can effectively dissipate the heat generated by the engine exhaust inside the protective cover 13 to prevent the temperature inside the protective cover 13 from being too high. At the same time, the protective cover 13 can protect the noise reduction tube 4 from damage by the external environment, and can also prevent people from accidentally touching the noise reduction tube 4 and getting burned; a muffler baffle 19 for reducing noise is fixed on the inside of the exhaust pipe 8, and a plurality of muffler holes are opened on the muffler baffle 19. This design can effectively reduce noise, while increasing the ventilation area of ​​the exhaust pipe, reducing the resistance of air flow, and further reducing noise.

[0041] It is worth noting that the circuits, electronic components and modules involved in the present utility model are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present utility model does not involve improvements to software and methods.

[0042] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0043] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A diesel engine noise reduction structure, characterized in that: include: A metal pipe (3) assembled at an exhaust port (2) on a diesel engine body (1); A noise reduction cylinder (4) is mounted on the gas outlet end of the metal tube (3), wherein a noise reduction block (5) for reducing exhaust noise is arranged inside the noise reduction cylinder (4), and a channel (6) for airflow to pass through is opened on the noise reduction block (5); A detachable cylinder cover (7) arranged on the top of the noise reduction cylinder (4); an exhaust pipe (8) mounted on the top of the cylinder cover (7); A collecting mechanism for collecting carbon deposits, wherein the collecting mechanism is arranged on the metal tube (3).

2. The diesel engine noise reduction structure according to claim 1, characterized in that: The collection mechanism includes: A sealing threaded sleeve (9) fixed on the metal pipe (3); a threaded pipe (10) threadably mounted on the threaded sleeve (9), the dust inlet end of the threaded pipe (10) being connected to the metal pipe (3), and a valve being arranged on the threaded pipe (10); A metal bottle (11) is fixedly mounted on the dust outlet end of the threaded pipe (10).

3. The diesel engine noise reduction structure according to claim 1, characterized in that: A sleeve plate (12) is fixedly sleeved on the noise reduction cylinder (4), a detachable protective cover (13) for shielding the noise reduction cylinder (4) is provided on the sleeve plate (12), and heat dissipation holes are evenly opened on the protective cover (13).

4. The diesel engine noise reduction structure according to claim 3, characterized in that: A first bolt (14) for fixing the protective cover (13) is threadedly mounted on the sleeve plate (12), and one end of the first bolt (14) is threadedly connected to the protective cover (13).

5. The diesel engine noise reduction structure according to claim 1, characterized in that: A hook (15) for limiting position is fixedly mounted on the cylinder cover (7), and a buckle (16) that can be engaged with or separated from the hook (15) is fixedly mounted on the noise reduction cylinder (4).

6. The diesel engine noise reduction structure according to claim 1, characterized in that: A heat dissipation layer (17) and a protective layer (18) for dissipating heat are arranged outside the metal tube (3), and air pores are evenly arranged on the protective layer (18).

7. The diesel engine noise reduction structure according to claim 1, characterized in that: A noise-reducing baffle (19) is fixed obliquely on the inside of the exhaust pipe (8), and is used to reduce noise. The noise-reducing baffle (19) is provided with a plurality of noise-reducing holes.

8. The diesel engine noise reduction structure according to claim 1, characterized in that: The top of the cylinder cover (7) is provided with an air outlet adapted to the exhaust pipe (8), and the exhaust pipe (8) and the metal pipe (3) are both provided with second bolts, and the corresponding second bolts are respectively threadedly connected to the noise reduction cylinder (4) and the cylinder cover (7).

Images