Air inlet noise reduction structure of marine diesel engine

Abstract

The utility model discloses a ship diesel engine air inlet noise reduction structure, relates to the technical field of ship diesel engines, and comprises a side sealing plate, a noise reduction cover and a partition plate piece, one side of the side sealing plate is connected with a noise reduction box body, one side of the side sealing plate is connected with an air suction pipe piece, a noise reduction mechanism is arranged in the noise reduction box body, and the noise reduction cover is connected with the partition plate piece. The noise reduction mechanism is arranged under the air inlet branch pipes, the noise caused by air flow suction of the air inlet branch pipes is reduced through the noise reduction mechanism, and therefore the situation that the noise becomes large due to the fact that a large amount of air is sucked at a time is avoided; the situation that water vapor or dust enters a diesel engine in the ship traveling process, and consequently air suction noise is increased is avoided, due to the fact that the air suction pipe fittings are arranged on the outer side of the silencing box body at equal intervals, the multiple sets of air suction pipe fittings are used for dividing sucked air, meanwhile, the multiple sets of silencing covers are used for preventing vibration of the sound of the sucked air, and the transmission path of the noise is weakened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of marine diesel engine, concretely relates to marine diesel engine air intake silencing structure. BACKGROUND

[0002] The advantage of diesel engine is that power is big, and economic performance is good, and the working process of diesel engine has many same places with gasoline engine, and each working cycle also experiences four strokes of intake, compression, work, and exhaust, but since the fuel used by diesel engine is diesel, its viscosity is bigger than gasoline, and it is not easy to evaporate, and its self-ignition temperature is lower than gasoline, and the mixture in the cylinder of diesel engine is compression ignition, and air is entered into the cylinder when the diesel engine works.

[0003] In the use process of the silencing mechanism, generally, the inhaled gas is treated by noise reduction through multiple groups of silencing materials, but in the fixing process of the silencing materials, it is difficult to quickly assemble and position the silencing materials of different specifications according to the size and air intake of the diesel engine, thereby increasing the difficulty of maintenance and replacement of the silencing materials. SUMMARY

[0004] The utility model discloses a marine diesel engine air intake silencing structure to solve the above-mentioned defects caused in the prior art.

[0005] The marine diesel engine air intake silencing structure includes a side sealing plate, a silencing cover and a partition plate, one side of the side sealing plate is connected with a silencing box body, one side of the side sealing plate is connected with an air suction pipe, the inside of the silencing box body is provided with a silencing mechanism, the silencing mechanism reduces the noise caused by the inhaled airflow of the air intake pipe, thereby avoiding the noise caused by the one-time inhalation of a large amount of gas, a filtering mechanism is arranged below the silencing mechanism, the filtering mechanism filters the inhaled air, avoids the water vapor or dust in the process of ship driving from entering the diesel engine, and causes the air intake noise to increase.

[0006] Preferably, the silencing mechanism includes an air intake pipe, a silencing cover, a partition plate, a ventilation hole and a guide groove, the air intake pipe is arranged at the top end of the silencing box body at equal intervals, the inside of the silencing box body is provided with multiple groups of silencing covers, the bottom end of the silencing cover is connected with the partition plate, the outside of the partition plate is provided with ventilation holes at equal intervals, the inside of the silencing box body is provided with guide grooves symmetrically, the partition plate is installed in the inside of the silencing box body, and the top end of the silencing cover is provided with an air inlet hole.

[0007] Preferably, the partition plate is connected with the bottom end of the air intake pipe through the silencing cover arranged at the top end at equal intervals.

[0008] Preferably, the filtration mechanism includes a guide groove, fasteners, nuts, sliders, spring posts, and filter elements. The fasteners are installed at the bottom of the silencer housing. A slider is provided inside the guide groove. A partition plate is attached to the outside of the slider. A nut is connected through the outside of the partition plate. A filter element is provided directly below the partition plate. One end of the spring post is welded to the top of the slider. The other end of the spring post is connected to the inside of the guide groove.

[0009] Preferably, the filter element is connected to the bottom end of the partition plate by symmetrically arranged fasteners.

[0010] Preferably, the partition plate is connected to the guide groove via symmetrically arranged sliders.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. Due to the intake pipes evenly spaced on the outside of the muffler housing, multiple sets of intake pipes are used to divert the intake air, and multiple sets of mufflers are used to dampen the sound of the intake air, reducing the noise propagation path. As a result, the sound pressure level of the noise transmitted to the outside through the air filter intake pipe is greatly reduced, and the volume perceived by the human ear is reduced by a factor of two. This effectively eliminates engine noise and has the advantages of wide sound damping bandwidth and good noise reduction effect.

[0013] 2. During use, the partition plate is positioned by the guide groove. The height of the partition plate is adjusted by the slider. The partition plate is used to support the mufflers of different sizes, which facilitates the muffler covering the intake pipe for noise reduction. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of the silencer enclosure in this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the soundproof enclosure in this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the soundproof cover in this utility model.

[0018] Figure 5 This is a side sectional view of the silencer enclosure in this utility model.

[0019] in:

[0020] 1. Side sealing plate; 2. Intake pipe fittings; 3. Silencer housing; 4. Intake pipe; 5. Silencer mechanism; 6. Divider plate fittings; 7. Silencer cover; 8. Fasteners; 9. Filter mechanism; 10. Vent hole; 11. Guide groove; 12. Intake hole; 13. Nut; 14. Slider; 15. Spring column; 16. Filter element. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 5 As shown, the intake noise reduction structure of a marine diesel engine includes a side sealing plate 1, a noise reduction cover 7, and a partition plate 6. A noise reduction housing 3 is connected to one side of the side sealing plate 1, and an intake pipe 2 is connected to another side of the side sealing plate 1. A noise reduction mechanism 5 is installed inside the noise reduction housing 3. The noise reduction mechanism 5 reduces the noise caused by the intake airflow from the intake pipe 4, thereby preventing the noise from increasing due to the intake of a large amount of gas at once. A filter mechanism 9 is installed directly below the noise reduction mechanism 5. The filter mechanism 9 filters the intake air to prevent water vapor or dust from entering the diesel engine during ship operation, which would increase intake noise.

[0023] In this embodiment, the silencing mechanism 5 includes a split air intake pipe 4, a silencing cover 7, a partition plate 6, a vent hole 10, and a guide groove 11. The split air intake pipes 4 are evenly spaced at the top of the silencing housing 3. Multiple sets of silencing covers 7 are arranged inside the silencing housing 3. The bottom end of the silencing cover 7 is connected to the partition plate 6. Vent holes 10 are evenly spaced on the outer side of the partition plate 6. Guide grooves 11 are symmetrically arranged inside the silencing housing 3. The partition plate 6 is installed inside the silencing housing 3. An air intake hole 12 is opened through the top of the silencing cover 7.

[0024] In this embodiment, the partition plate 6 is connected to the bottom end of the air intake pipe 4 through the soundproof cover 7 with equal spacing at the top. The partition plate 6 supports the bottom end of the soundproof cover 7 to reduce noise in the intake air.

[0025] In this embodiment, the filtration mechanism 9 includes a guide groove 11, a fastener 8, a nut 13, a slider 14, a spring post 15, and a filter element 16. The fastener 8 is installed at the bottom of the silencer housing 3. The slider 14 is disposed inside the guide groove 11. A partition plate 6 is attached to the outside of the slider 14. The nut 13 is connected through the outside of the partition plate 6. The filter element 16 is disposed directly below the partition plate 6. One end of the spring post 15 is welded to the top of the slider 14. The other end of the spring post 15 is connected to the inside of the guide groove 11.

[0026] In the embodiment, the filter core 16 is connected with the bottom end of the partition plate 6 through the symmetrically arranged fasteners 8, and the air is filtered through the filter core 16 while the air flow rate is slowed down.

[0027] In the embodiment, the partition plate 6 is connected with the guide groove 11 through the symmetrically arranged sliding blocks 14, and the two sides of the partition plate 6 are positioned through the sliding blocks 14, so that the partition plate 6 is positioned and assembled.

[0028] The ship diesel engine air intake silencing structure in actual application, including the following working contents:

[0029] Step 1: in the use process, according to the specification and the air intake of diesel engine, the air intake pipe 2 is connected with the suction end of diesel engine, in the use process, the silencer 7 is installed at the top end of the partition plate 6, in the use process, the sliding block 14 arranged at both sides of the partition plate 6 is displaced in the guide groove 11, the air inlet hole 12 arranged at the top end of the corresponding size silencer 7 covers the bottom end of the branch air inlet pipe 4, the air sucked by the branch air inlet pipe 4 is injected into the inside of the silencer 7, and the silencer 7 is used for reducing noise and silencing the sucked air;

[0030] Step 2: after the silencer 7 is fixed, the partition plate 6 connected with the sliding block 14 is pulled, so that the sliding block 14 is displaced outside the guide groove 11, and the fixed end of the sliding block 14 is positioned by the spring column 15, so that the sliding block 14 is prevented from shaking in the lifting process, and the partition plate 6 and the silencer 7 are displaced or not disassembled, and the silencer 7 is disassembled;

[0031] Step 3: when the partition plate 6 and the sliding block 14 are connected, the screw is inserted into the nut 13, the contact surface of the partition plate 6 and the sliding block 14 is locked, the filter core 16 is installed at the bottom end of the partition plate 6, and the partition plate 6 and the filter core 16 are locked by the fastener 8.

[0032] Step 4: the bottom end of the silencer 7 is of a rectangular opening structure, the sucked air is discharged to the surface of the partition plate 6, the gas is shunted through the air hole 10 arranged on the outside of the partition plate 6, the water vapor and impurities in the air are filtered through the filter core 16, and then the air is discharged to the inside of the diesel engine through the air intake pipe 2 arranged on one side of the side sealing plate 1.

[0033] Therefore, the above disclosed embodiments are only examples and are not the only ones. All changes within the scope of the utility model or within the scope equivalent to the utility model are included in the utility model.

Claims

1. A marine diesel engine intake silencing structure, characterized by: Including side sealing plate (1), silencer (7) and partition plate (6), one side of the side sealing plate (1) is connected with the silencer box (3), one side of the side sealing plate (1) is connected with the air pipe (2), the inside of the silencer box (3) is provided with silencing mechanism (5), the silencing mechanism (5) reduces the noise caused by the intake air flow of the air inlet pipe (4), in turn avoids the noise caused by the intake of a large amount of gas, the silencing mechanism (5) is provided below the filter mechanism (9), the filter mechanism (9) filters the air inhaled, avoids the water vapor or dust in the process of ship sailing into the diesel engine, causes the air intake noise to increase.

2. The marine diesel engine air intake silencing structure according to claim 1, characterized in that: The silencing mechanism (5) includes air inlet pipe (4), silencer (7), partition plate (6), air hole (10) and guide groove (11), the air inlet pipe (4) is arranged at the top of the silencer box (3) at equal intervals, the inside of the silencer box (3) is provided with multiple silencers (7), the bottom end of the silencer (7) is connected with the partition plate (6), the outside of the partition plate (6) is provided with air holes (10) at equal intervals, the inside of the silencer box (3) is provided with guide grooves (11) symmetrically, the partition plate (6) is installed in the inside of the silencer box (3), the top end of the silencer (7) is provided with air inlet hole (12).

3. The marine diesel engine air intake silencing structure according to claim 2, characterized in that: The partition plate (6) is connected with the bottom end of the air inlet pipe (4) through the silencers (7) arranged at the top end at equal intervals.

4. The marine diesel engine air intake silencing structure according to claim 1, characterized by: The filter mechanism (9) includes guide groove (11), fastener (8), nut (13), sliding block (14), spring column (15) and filter core (16), the fastener (8) is installed at the bottom end of the silencer box (3), the inside of the guide groove (11) is provided with sliding block (14), the outside of the sliding block (14) is attached with the partition plate (6), the outside of the partition plate (6) is connected with the nut (13) penetratingly, the partition plate (6) is provided below the filter core (16), the upper side of the sliding block (14) is welded with one end of the spring column (15), the other end of the spring column (15) is connected with the inside of the guide groove (11).

5. A marine diesel engine air intake silencing structure according to claim 4, characterised in that: The filter core (16) is connected with the bottom end of the partition plate (6) through the symmetrically arranged fastener (8).

6. The marine diesel engine air intake silencing structure according to claim 4, characterized in that: The partition plate (6) is connected with the guide groove (11) through the symmetrically arranged sliding block (14).

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