Noise reduction device for diesel engine

Abstract

The noise reduction device for the diesel engine comprises a base, the diesel engine is fixedly installed on the base, a noise reduction cover is fixedly installed on the base and covers the outer side of the diesel engine, and an output shaft receding hole is formed in the noise reduction cover in a penetrating mode and right faces an output shaft of the diesel engine. An exhaust pipe receding hole is formed in the position, right opposite to an exhaust pipe of the diesel engine, of the base. A plurality of air inlet pipes are fixedly installed at the lower end of the silencing cover in the circumferential direction, the outer ends of the air inlet pipes are connected through an air inlet ring, and a plurality of air inlet holes are formed in the two sides of the air inlet ring. A plurality of air outlet pipes are fixedly installed on the silencing cover and located above the air inlet pipe, the outer ends of the air outlet pipes are connected through a pipeline, the pipeline is connected with an exhaust fan through an exhaust pipe, and the exhaust fan is fixedly installed on the silencing cover. The noise reduction device for the diesel engine has the advantages of being simple in structure, high in heat dissipation efficiency and convenient to use.

Description

Technical Field

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

[0002] A diesel engine is an engine that burns diesel to release energy. The advantages of a diesel engine are high torque and good economic performance, but it also produces a lot of noise during use, affecting the operating environment.

[0003] At present, in order to reduce the noise of diesel engines, the exhaust pipes are equipped with silencer packs. At the same time, silencer covers are used to prevent the noise from spreading outward. However, since diesel engines generate high temperatures during use, silencer covers will hinder heat dissipation. Long-term use will affect the life of the diesel engine. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a diesel engine silencer and noise reduction device with a simple structure, high heat dissipation efficiency, and ease of use.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A noise reduction device for a diesel engine includes a base, the diesel engine is fixedly mounted on the base, a muffler cover is fixedly mounted on the base, the muffler cover is arranged outside the diesel engine, the muffler cover is provided with an output shaft clearance hole through the muffler cover facing the output shaft of the diesel engine, and the base is provided with an exhaust pipe clearance hole facing the exhaust pipe of the diesel engine;

[0007] A plurality of air intake pipes are fixedly installed around the lower end of the muffler cover, and the outer ends of the air intake pipes are connected through an air intake ring, and a plurality of air intake holes are opened on both sides of the air intake ring;

[0008] A plurality of air outlet pipes are fixedly mounted on the silencer cover. The air outlet pipes are located above the air inlet pipes. The outer ends of the air outlet pipes are connected through pipes. The pipes are connected to the exhaust fan through exhaust pipes. The exhaust fan is fixedly mounted on the silencer cover.

[0009] In this way, the diesel engine is fixedly mounted on the base, and the silencer cover is located outside the diesel engine, which can muffle the diesel engine and reduce the noise from being transmitted outward. The exhaust fan is activated, driving the air flow. The air outside the silencer cover passes through the air inlet hole, the air inlet ring and the air inlet pipe to reach the silencer cover, driving the heat inside the silencer cover to be discharged through the air outlet pipe, the pipe, the exhaust pipe and the exhaust fan, which can remove the heat inside the silencer cover, cool the diesel engine and extend the service life of the diesel engine.

[0010] A baffle is fixed downwardly on the top wall of the silencer cover, and the lower end of the baffle is fixedly connected to the silencer cover through a sealing plate. A silencer channel is formed between the baffle, the sealing plate and the silencer cover. A plurality of air holes connected to the silencer channel are opened at the upper end of the baffle, and the air outlet pipe is connected to the silencer channel.

[0011] Among them, three layers of sound-absorbing panels are fixed in the sound-absorbing channel, sound-absorbing holes are opened on the sound-absorbing panels, and the sound-absorbing holes arranged on two adjacent layers of sound-absorbing panels are staggered.

[0012] Wherein, a shielding plate is fixedly installed on the base facing the output shaft clearance hole.

[0013] Wherein, the base is fixedly mounted with supporting feet downwards.

[0014] In summary, the diesel engine silencing and noise reduction device has the advantages of simple structure, high heat dissipation efficiency, and ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a diesel engine silencing and noise reduction device.

[0016] Figure 2 for Figure 1 's disassembly diagram.

[0017] Figure 3 A cross-sectional view of the silencer cover. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional terms such as "upper, lower" and "top, bottom" are generally based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. Unless otherwise indicated, these directional terms do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention; the directional terms "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0019] like Figure 1-3 As shown, a noise reduction device for a diesel engine includes a base 1, on which the diesel engine is fixedly mounted, a muffler cover 2 is fixedly mounted on the base, the muffler cover is arranged on the outside of the diesel engine, an output shaft clearance hole 3 is provided through the muffler cover facing the output shaft of the diesel engine, and an exhaust pipe clearance hole 4 is provided on the base facing the exhaust pipe of the diesel engine;

[0020] A plurality of air intake pipes 5 are fixedly installed around the lower end of the muffler cover. The outer ends of the air intake pipes are connected through an air intake ring 6. A plurality of air intake holes 7 are opened on both sides of the air intake ring.

[0021] Several air outlet pipes 8 are fixedly installed on the silencer cover. The air outlet pipes are located above the air inlet pipes. The outer ends of the air outlet pipes are connected through pipes 9. The pipes are connected to the exhaust fan 11 through exhaust pipes 10. The exhaust fan is fixedly installed on the silencer cover.

[0022] In this way, the diesel engine is fixedly mounted on the base, and the silencer cover is located outside the diesel engine, which can muffle the diesel engine and reduce the noise from being transmitted outward. The exhaust fan is activated, driving the air flow. The air outside the silencer cover passes through the air inlet hole, the air inlet ring and the air inlet pipe to reach the silencer cover, driving the heat inside the silencer cover to be discharged through the air outlet pipe, the pipe, the exhaust pipe and the exhaust fan, which can remove the heat inside the silencer cover, cool the diesel engine and extend the service life of the diesel engine.

[0023] During implementation, a baffle 12 is fixed downwardly to the top wall of the muffler cover. The lower end of the baffle is fixedly connected to the muffler cover via a sealing plate 13. A muffler channel 14 is formed between the baffle, sealing plate, and muffler cover. The upper end of the baffle is provided with a plurality of air holes 15 that communicate with the muffler channel. The air outlet pipe is connected to the muffler channel. The muffler channel formed between the baffle, sealing plate, and muffler cover allows air to pass through the air holes, enter the muffler channel, and then be discharged, thereby reducing noise and achieving a sound-absorbing effect.

[0024] During implementation, three layers of muffler plates 16 are fixed in the muffler channel, each of which is provided with muffler holes 17. The muffler holes on two adjacent layers of muffler plates are staggered. By setting the muffler plates and the muffler holes staggered, airflows collide, improving the muffler effect.

[0025] During implementation, the base is fixedly mounted with a shielding plate 18 opposite to the output shaft clearance hole, thereby reducing the noise transmitted outward from the output shaft clearance hole and better improving the silencing effect.

[0026] During implementation, the base is fixedly mounted with supporting legs 19 downward.

[0027] Finally, it should be noted that those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A noise reduction device for a diesel engine, characterized in that: The diesel engine is fixedly mounted on the base, a silencer is fixedly mounted on the base, the silencer is arranged on the outside of the diesel engine, an output shaft clearance hole is provided through the silencer facing the output shaft of the diesel engine, and an exhaust pipe clearance hole is provided on the base facing the exhaust pipe of the diesel engine; A plurality of air intake pipes are fixedly installed around the lower end of the muffler cover, and the outer ends of the air intake pipes are connected through an air intake ring, and a plurality of air intake holes are opened on both sides of the air intake ring; A plurality of air outlet pipes are fixedly mounted on the silencer cover. The air outlet pipes are located above the air inlet pipes. The outer ends of the air outlet pipes are connected through pipes. The pipes are connected to the exhaust fan through exhaust pipes. The exhaust fan is fixedly mounted on the silencer cover.

2. A diesel engine noise reduction device according to claim 1, characterized in that: A baffle is fixed downwardly on the top wall of the silencer cover, and the lower end of the baffle is fixedly connected to the silencer cover through a sealing plate. A silencer channel is formed between the baffle, the sealing plate and the silencer cover. A plurality of air holes connected to the silencer channel are opened on the upper end of the baffle, and the air outlet pipe is connected to the silencer channel.

3. A diesel engine noise reduction device according to claim 2, characterized in that: Three layers of sound-absorbing panels are fixed in the sound-absorbing channel. Sound-absorbing holes are provided on the sound-absorbing panels. The sound-absorbing holes provided on two adjacent layers of sound-absorbing panels are staggered.

4. A diesel engine noise reduction device according to claim 1, characterized in that: A shielding plate is fixedly mounted on the base facing the output shaft clearance hole.

5. The diesel engine noise reduction device according to claim 1, characterized in that: The base is fixedly mounted with supporting feet downwards.

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