Silent box diesel generator set

Abstract

The application discloses a mute box type diesel generator set, which comprises a modular mute box structure, a tunnel type ventilation system, a heat dissipation optimization assembly and a muffler layout; the modular structure is assembled through a detachable connection mode; the tunnel type ventilation system ensures that cold air uniformly covers the generator, the diesel engine and the water tank radiator, and avoids local high temperature; the heat dissipation optimization assembly improves the heat dissipation efficiency through a blowing type fan and an optimized air flow path; the muffler is transversely installed and the pipeline layout is optimized, so that heat accumulation is reduced and the stability of the unit is improved; in addition, the flat bottom disc-shaped blade and the sawtooth structure design are used to reduce noise, efficiently dissipate heat and operate at low noise. The application significantly improves the heat dissipation effect, reliability and service life of the generator set, and solves the technical problem of low heat dissipation efficiency commonly existing in the prior mute box type diesel generator set.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power generation equipment, and particularly relates to a mute box type diesel generator set. BACKGROUND

[0002] As a backup power supply system, the diesel generator set is widely used in hospitals, data centers, communication base stations and other scenes with extremely high requirements for power supply reliability. The design of the mute box type diesel generator set needs to meet the requirements of low noise, high efficient heat dissipation and convenient maintenance. The closed mute box structure can effectively reduce noise, but seriously restricts the heat dissipation performance. Some existing structures have ventilation openings and installed axial flow fans, but the air flow is disorganized, and the hot and cold air is easily mixed, resulting in low heat dissipation efficiency, and even causing local overheating of the diesel engine. Some improved schemes add louvers at the inlet / outlet air opening, but the louver blades are mostly flat or arc-shaped structures, which can only achieve simple waterproof and dustproof, and the blade angle is fixed and cannot guide the air flow to flow directionally. The generator, diesel engine and water tank radiator are respectively provided with independent air ducts, which can avoid heat backflow, but the structure is complex and occupies space, and it is difficult to meet the compactness requirement of the modular mute box. The muffler is longitudinally arranged on the side of the unit, and the exhaust pipe needs to bypass the inside of the box, which not only increases the heat radiation of the exhaust gas, but also hinders the flow of cold air, further deteriorating the heat dissipation condition. The above problems cause the existing mute box type unit to frequently trigger high temperature alarm when running at high load, and even run at limited power due to insufficient heat dissipation. Therefore, an innovative scheme is needed to realize efficient directional heat dissipation in limited space, while considering noise reduction and modular assembly requirements. SUMMARY

[0003] In view of the above problems, one object of the present application solves the technical problem of low heat dissipation efficiency of the existing mute box type diesel generator set, and provides a mute box type diesel generator set which realizes efficient directional heat dissipation in limited space, while considering noise reduction and modular assembly requirements.

[0004] In order to achieve these objects and other advantages of the present application, a mute box type diesel generator set is provided, which comprises:

[0005] The modular mute box structure is assembled by a chassis component, a right side cover component, a left side cover component, a top cover component, a front door component and an electrical box component through detachable connection, each component adopts a steel plate folded beam structure; the right side cover component and the left side cover component are respectively provided with an air inlet and an air outlet, and both are provided with louvers, a blade section of the louver is a flat disc structure, a front section and a rear section of the blade are bent (for example, the bending angle is 135 degrees), and a middle section is straight, when a plurality of blades are arranged in parallel at an equal distance to form a zigzag air duct between adjacent blades, and at this time, the front section of the blade is in a vertical state, and can block the airflow from directly horizontally entering the interior of the mute box through the air duct; the middle section of the blade is in an inclined state, and guides the airflow to pass through the air duct; the rear section of the blade is in a parallel state, so that the airflow horizontally enters the interior of the mute box.

[0006] The tunnel type ventilation system is configured to form a directional airflow channel, wherein cold air enters from the air inlet of the right side cover component, is guided by the louver blades to form horizontal airflow, sequentially flows through the generator, the diesel engine and the water tank radiator, and is discharged from the air outlet of the left side cover component.

[0007] The heat dissipation optimization assembly comprises a blowing type heat dissipation fan of the diesel engine, a water tank radiator and a generator heat dissipation air duct; the blowing type heat dissipation fan is arranged at the front end of the diesel engine, and cold air is sucked from the air inlet and forced to blow to the generator and the diesel engine; the air inlet of the generator is arranged on the same side as the air inlet of the mute box, the tail end heat dissipation air inlet directly introduces cold air, and the air outlet is connected in series with the heat dissipation path of the diesel engine.

[0008] The muffler and the pipeline layout, the muffler is transversely installed on the upper beam of the mute box, the exhaust direction is the same as that of the air outlet of the left side cover component, and the length of the muffler connecting pipeline is less than 1 / 2 of the width of the mute box.

[0009] The flat disc-shaped blade of the louver of the embodiment cooperates with the zigzag air duct to reduce airflow resistance, and the cold air flow is increased by more than 40%, while rainwater and noise are blocked from leaking out; the tunnel type ventilation system forces the airflow to sequentially flow through the key heat generating components to improve the heat dissipation efficiency; the blowing type fan is connected in series with the generator heat dissipation air duct to maximize the utilization rate of cold air and reduce the continuous operation temperature of the unit; the transverse arrangement of the muffler and the short pipeline design reduce the airflow interference of high-temperature exhaust gas in the box and reduce the exhaust resistance.

[0010] Further, the louver air inlet of the right side cover and the same type air outlet of the left side cover form a directional ventilation tunnel;

[0011] The blowing type heat dissipation fan is axially aligned with the core area of the water tank radiator to form a main heat dissipation channel consistent with the tunnel flow direction; the air inlet of the generator has an axial deviation angle of ≤15° with the air inlet, and the generator housing is circumferentially provided with a generator air outlet, and the gas discharged from the air outlet is connected to the main heat dissipation channel through a flow guide cover.

[0012] The muffler is horizontally suspended on the top beam of the box body, and the exhaust direction is arranged at an acute angle of 30-45° with the outlet axial direction, the length of the exhaust pipeline is ≤0.5m, and the surface is covered with an aerogel heat insulation layer.

[0013] Further, the surface of the blade of the louver is provided with a sawtooth structure, the sawteeth are continuously distributed on the windward surface and the leeward surface of the middle section of the blade at an inclination angle of 25-35°, the spacing between adjacent sawteeth is 2-5mm, and the height of the sawteeth is 1-3mm.

[0014] Further, the sawteeth on the surface of the middle section of the blade are distributed in a gradient density along the airflow direction:

[0015] The first gradient sawtooth spacing is 4-6mm;

[0016] The second gradient sawtooth spacing is 2-3mm;

[0017] The third gradient sawtooth spacing is 1-2mm;

[0018] The spacing variation rate of adjacent sawteeth is ≤15%.

[0019] At the first gradient, the airflow is low in speed and strong in turbulence intensity when it first enters, and a lower density of sawteeth is needed to avoid excessive disturbance; at the second gradient, the airflow is accelerated, and a high density of sawteeth is needed to enhance vortex breaking and heat exchange; at the third gradient, the airflow tends to be stable, and the dense sawteeth can suppress boundary layer separation noise and input horizontal airflow into the box body. The spacing variation rate of adjacent sawteeth is ≤15% to prevent secondary vortex generation caused by sudden changes.

[0020] Further, the surface of the blade and the sawteeth of the louver are further covered with a hydrophobic-heat-conductive composite coating, which comprises, from the inside out:

[0021] A 50-80μm thick anodic aluminum oxide layer with a thermal conductivity coefficient ≥200W / (m·K);

[0022] A 20-30μm thick fluorocarbon resin layer with a contact angle ≥150° and a surface energy ≤15mN / m;

[0023] The sawtooth root is provided with a water guide groove, and the groove depth is 1 / 3-1 / 2 of the sawtooth height.

[0024] Further, the groove depth of the water guide groove gradually increases from one end to the other end along the length direction of the blade, the increasing gradient of the groove depth is 0.05-0.2mm / cm, the bottom of the water guide groove is inclined to one side of the blade by 3°-10°, and the water collected on the blade is collected to the end of the blade in the inclined direction and discharged.

[0025] The uniform groove depth cannot match the condensate water generation rate difference of different regions of the blade (the middle section heat exchange region produces a large amount of water), and the deep incremental gradient (0.05-0.2 mm / cm) of the embodiment can match the linear increase of the condensate water flow along the length direction of the blade, and the bottom inclination angle utilizes gravity self-cleaning to make water droplets quickly slide off the surface of the blade.

[0026] Further, the flow guide cover comprises:

[0027] The wing plates are arranged in parallel on the upper and lower sides of the generator exhaust port.

[0028] The arc-shaped cover plates are arranged between the wing plates and cover the generator exhaust port.

[0029] The wing plates and the arc-shaped cover plates construct a tapered flow channel to guide airflow acceleration, create a low pressure area above the generator exhaust port, and promote the internal gas of the generator to be discharged from the exhaust port to carry away heat.

[0030] The present application at least includes the following beneficial effects:

[0031] 1. The modular silent box structure, tunnel type ventilation system, heat dissipation optimization assembly, muffler and pipeline layout design of the present application reduce the number of parts, simplify the assembly process, improve the assembly efficiency, optimize the airflow direction, improve the heat dissipation effect and reliability of the silent box type generator set, improve the intake efficiency of the diesel engine, reduce fuel consumption, optimize the internal structure of the box, improve the heat dissipation effect of the motor, ensure the output power stability of the motor, and prolong the service life of the motor.

[0032] 2. The flat bottom disc-shaped blade of the present application constructs a zigzag air duct, reduces airflow resistance, improves cold air flow, reduces rainwater intrusion, and reduces noise leakage through the composite flow channel design of the front vertical block, middle inclined flow guide and rear horizontal input, combined with the sawtooth structure design.

[0033] 3. In view of the problem that the internal part of the generator is relatively closed and it is difficult to form airflow conduction and efficient heat dissipation, the present application designs a flow guide cover combined with the airflow direction above the circumferential exhaust port of the generator to create a low pressure area, promote the internal gas of the generator to be discharged from the exhaust port to carry away heat, and accelerate the entry into the main heat dissipation flow channel.

[0034] Other advantages, objects and features of the present application will be partly embodied in the following description, and partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the first structure schematic diagram of the silent box type diesel generator set of the present application.

[0036] Figure 2The second structural schematic view of the silent box type diesel generating set of the present application;

[0037] Figure 3 The structural schematic view of the vane arrangement of the present application;

[0038] Figure 4 The structural schematic view of the vane of the present application;

[0039] Figure 5 The structural schematic view of the fairing of the present application. DETAILED DESCRIPTION

[0040] The present application will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement the present application according to the description.

[0041] As shown in FIGS. 1-5, the silent box type diesel generating set comprises a silent box 1, a water tank radiator 2, a diesel engine 3, a generator 4, a tool box 5, and a fuel tank 6.

[0042] As shown in FIG. 2, the silent box 1 comprises a chassis part 11, a right side cover part 12, an electrical box part 13, a top cover part 14, a left side cover part 15, a front door part 16, a middle stand part 17, and a lower cover part 18, which are detachably connected and assembled by means of screws, rivets, hinges, etc.

[0043] As shown in FIG. 1, the diesel engine 3 comprises a diesel engine body 31, an engine cooling fan 32, a muffler 33, and an air cleaner 34, wherein the engine cooling fan 32 is of a blowing type structure.

[0044] The generator 4, as shown in FIG. 4, is connected to the diesel engine 3 at the generator casing. Figure 1 The tail end of the generator is the heat dissipation air inlet 401 of the generator casing.

[0045] The ventilation of the silent box 1 adopts a tunnel type structure, wherein the right side cover part 12 is the air inlet 101 of the silent box 1, and the left side cover part 15 is the air outlet 102 of the silent box 1.

[0046] The electrical box part 13 is designed with a working state display screen, buttons, and power connection terminals of the diesel generating set, and the lower end is the right side cover part 12, which is designed with the air inlet of the silent box 1, and the left side cover part 15 and the right side cover part 12 are both designed with louvers for rainproof and ventilation.

[0047] The right cover plate part 12 is the air inlet 101 of the soundproof box 1, and the left cover plate part 15 is the air outlet 102 of the soundproof box 1. The cross section of the louver blade installed on the left and right cover plate parts is a flat-bottomed disc structure, and the two ends of the blade are bent. When the soundproof box type diesel generator set starts, the engine cooling fan operates to suck cold air from the right cover plate part 12, guide the airflow through the louver blade, make the airflow flow horizontally through the inside of the soundproof box 1, cool the generator 4 and the diesel engine 3, and then flow through the water tank radiator 2 and the left cover plate part 15 to be discharged, avoiding the poor cooling caused by the turbulent flow of cold air in the box body, which causes the engine water temperature to be high and alarms.

[0048] The air inlet 401 of the generator 4 is arranged with the air inlet 101 of the soundproof box 1, which is beneficial to the generator to directly suck cold air from the air inlet of the soundproof box 1 for cooling, improves the cooling effect of the motor, and ensures the output power and service life of the soundproof box type generator set.

[0049] The left cover plate part 15 is designed with an exhaust port of the diesel engine 3. The exhaust gas of the diesel engine 3 is directly discharged into the atmosphere after being silenced by the silencer 33. The exhaust port of the diesel engine 3 is arranged on the same side as the air outlet of the soundproof box 1, effectively avoiding the problem of backflow of exhaust gas into the inside of the soundproof box 1. The exhaust direction of the diesel engine 3 is arranged at an acute angle of 30-45° with the axial direction of the air outlet, so that the discharged exhaust gas is pushed away by the air flow of the air outlet, reducing the backflow of exhaust gas. The length of the exhaust pipeline is ≤0.5m and the surface is coated with a aerogel heat insulation layer, effectively preventing the direct release of heat from the exhaust pipe to the inside of the box.

[0050] The silencer 33 of the diesel engine 3 is arranged horizontally and directly installed on the cross beam at the upper part of the soundproof box 1, so that the silencer 33 and its connecting pipeline are shortened, reducing the heat dissipation of the silencer 33 and its connecting pipeline in the soundproof box 1.

[0051] The tool box 5 and the fuel tank 6 are arranged at the bottom of the soundproof box 1, effectively utilizing the space at the bottom of the soundproof box 1. The modular design facilitates the disassembly of the tool box 5 and the fuel tank 6. When the fuel tank 6 fails, it can be replaced alone, ensuring the convenience and timeliness of maintenance.

[0052] The starting battery is integrated on the chassis part 11 and arranged on the side of the diesel engine 3.

[0053] The right cover plate part 12, the electrical box part 13, the top cover plate part 14 and the left cover plate part 15 of the mute box 1 are all folded into beams by steel plates, which ensures the strength while effectively reducing the weight. The whole mute box 1 is assembled by six parts, which is convenient for installation and transportation and reduces the production cost.

[0054] Further, in another embodiment, as shown in Figure 1 The 135° bending disc-shaped louvered air inlet 101 of the right cover plate 12 and the same type of air outlet 102 of the left cover plate 15 form a directional ventilation tunnel;

[0055] The blowing type cooling fan 32 is axially aligned with the core area of the water tank radiator 2, forming a main cooling channel consistent with the flow direction of the tunnel; the generator air inlet 401 has an axial deviation angle of ≤15° with the box air inlet 101, and since the heat dissipation exhaust port arranged at the front end surface of the generator shell directly collides with the diesel engine 3, resistance is formed, so the generator exhaust port 402 is further arranged on the circumference of the generator shell, and the gas discharged from the exhaust port 402 flows into the main cooling channel through the flow guide cover 41;

[0056] The muffler 33 is horizontally suspended on the top beam of the box body, and the exhaust direction is arranged at an acute angle of 30-45° with the axial direction of the air outlet, the exhaust pipe length is ≤0.5m, and the surface is covered with a aerogel thermal insulation layer.

[0057] Further, in another embodiment, as shown in Figure 3 The sawtooth structure is arranged on the surface of the louver blade, and the sawteeth are continuously distributed on the windward surface and the leeward surface of the middle section of the blade at an inclination angle of 25-35°, the spacing between adjacent sawteeth is 2-5mm, and the height of the sawteeth is 1-3mm.

[0058] Further, in another embodiment, the sawteeth on the surface of the middle section of the blade are gradiently distributed in the airflow direction:

[0059] The first gradient sawtooth spacing is 4-6mm;

[0060] The second gradient sawtooth spacing is 2-3mm;

[0061] The third gradient sawtooth spacing is 1-2mm;

[0062] The spacing variation rate between adjacent sawteeth is ≤15%.

[0063] The first gradient is low speed and high turbulence intensity when the airflow first enters, so a low-density sawtooth is needed to avoid excessive disturbance; the second gradient is high speed, so a high-density sawtooth is needed to enhance vortex breaking and heat exchange; the third gradient is stable airflow, so an encryption sawtooth can suppress boundary layer separation noise and input horizontal airflow to the inside of the box; a change rate of the spacing between adjacent sawteeth of ≤15% can prevent secondary vortex generation caused by sudden changes; and the sawtooth can also effectively reduce the leakage of noise inside the box.

[0064] The sawtoothed blade structure of the 135° disc louver in this embodiment is verified by fluid simulation CFD simulation. When the Reynolds number Re = 5 × 10 4 , the wind resistance coefficient is less than or equal to 0.51, and the rain penetration efficiency is as high as 99%. Compared with the blade without sawtooth, the noise leakage is reduced by 5-10 dB(A).

[0065] Further, in another embodiment, as shown in Figure 4 , the blade and sawtooth surface of the louver are also covered with a hydrophobic-heat-conductive composite coating, which includes, from the inside out:

[0066] 50-80 μm thick anodic aluminum oxide layer, thermal conductivity ≥200 W / (m·K);

[0067] 20-30 μm thick fluorocarbon resin layer, contact angle ≥150°, surface energy ≤15 mN / m;

[0068] The sawtooth root is provided with a water guide groove, and the groove depth is 1 / 3-1 / 2 of the sawtooth height.

[0069] The hydrophobic coating of this embodiment makes the water droplets roll off in 0.5 seconds, reducing wind resistance; the anodic aluminum oxide layer conducts heat from the blade surface to the airflow, improving heat dissipation efficiency; and the water guide groove directs the flow to avoid water corrosion.

[0070] Further, in another embodiment, as shown in Figure 4 , the groove depth of the water guide groove gradually increases from one end to the other end along the length of the blade, and the increasing gradient of the groove depth is 0.05-0.2 mm / cm, so that the bottom of the water guide groove is inclined to one side of the blade by 3°-10°, and the water collected on the blade is collected to the end of the blade in the inclined direction and discharged.

[0071] A uniform groove depth cannot adapt to the difference in condensate generation rate in different areas of the blade (high water production in the middle heat exchange area), while the deep increasing gradient (0.05-0.2 mm / cm) of this embodiment can match the linear increase of the condensate flow along the length of the blade, and the bottom inclination angle uses gravity for self-cleaning, so that the water droplets quickly slide off the surface of the blade.

[0072] Further, in another embodiment, as shown in Figure 5As shown, the fairing 41 comprises:

[0073] The wing plates 410 are arranged in parallel on both sides of the generator circumferential exhaust port 402, the front end of the wing plate extends along the length direction of the generator shell, the rear end exceeds the exhaust port, and the wing plate is fixed or adhesively fixed to the generator shell through a detachable connecting piece;

[0074] The arc-shaped cover plate 412 connects the upper and lower wing plates; preferably, the curvature radius R thereof is 0.6W±0.05W (W is the width of the exhaust port), and the vertical distance H1 between the vertex of the arc-shaped cover and the exhaust port is 0.5H±0.02H (H is the height of the wing plate);

[0075] The arc-shaped cover plate and the wing plate jointly form a converging-diverging nozzle 412 above the exhaust port 402, the converging-diverging nozzle 412 has a converging angle β of about 12°, the air flow entering the air inlet 101 flows along the generator shell, enters the converging-diverging nozzle from the front end of the wing plate, the arc-shaped cover plate gradually reduces the cross section of the converging-diverging nozzle (for example, the cross section S1 of the converging-diverging nozzle at the front end of the wing plate and the cross section S0 of the converging-diverging nozzle at the top of the arc-shaped cover plate can be set as S0 / S1=0.2-0.5), the Bernoulli effect is utilized to increase the air flow speed, the maximum speed is reached near the top of the arc-shaped cover plate, and then a steady low-pressure area 413 with a pressure difference ΔP of 250-400 Pa is formed above the exhaust port.

[0076] Tests show that the unit of the application can continuously run for 12 hours under the condition of 45℃, the water temperature is stabilized at 88±1.5℃, and the noise is reduced to about 67dB(A), effectively solving the problems of uneven heat dissipation and excessive noise.

[0077] Although the embodiments of the application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments. It can be fully applied to various fields suitable for the application. Those skilled in the art can easily make other modifications.

Claims

1. A silent box-type diesel generator set, characterized in that, include: The modular soundproof enclosure structure is assembled by bolts from a chassis component, a right side cover component, a left side cover component, a top cover component, a front door component, and an electrical box component. Each component adopts a steel plate folded beam structure. The right side cover component and the left side cover component are respectively provided with an air inlet and an air outlet, and both are equipped with louvers. The louver blades have a flat-bottomed disc-shaped structure. The front and rear sections of the blades are bent, and the middle section is straight. Several blades are arranged at equal intervals and parallels, forming a tortuous air duct between adjacent blades. The front section of the blade is vertical, blocking the airflow from entering directly horizontally. The middle section of the blade is inclined upward, guiding the airflow. The rear section of the blade is horizontal, allowing the airflow to enter the soundproof enclosure smoothly. The tunnel ventilation system is configured such that cold air enters from the air inlet on the right side of the cover plate, is guided by louvers to form a horizontal airflow, flows through the generator, diesel engine and water tank radiator in sequence, and is discharged from the air outlet on the left side of the cover plate. The heat dissipation optimization components include a blower-type cooling fan for the diesel engine, a water tank radiator, and a generator cooling duct. The blower-type cooling fan is located at the front of the diesel engine, forcibly drawing in cold air and blowing it toward the generator and the diesel engine. The generator air inlet is located on the same side as the soundproof box air inlet, the rear cooling air inlet directly introduces cold air, and the air outlet is connected in series with the diesel engine cooling path. The muffler is installed horizontally on the upper crossbeam of the soundproof box, and its exhaust direction is the same as the air outlet of the left cover plate. The length of the muffler connecting pipe is less than 1 / 2 of the width of the soundproof box. The louver blades are provided with serrations, which are continuously distributed on the windward and leeward sides of the blades at an angle of 25-35°. The serrations on the mid-section surface of the blade are distributed with a gradient density along the airflow direction: The first gradient sawtooth spacing is 4-6mm; The second gradient sawtooth spacing is 2-3mm; The third gradient sawtooth spacing is 1-2mm; Among them, the rate of change of the spacing between adjacent saw teeth is ≤15%.

2. The silent box-type diesel generator set as described in claim 1, characterized in that, The louvered air inlet on the right cover and the isomorphic air outlet on the left cover form a directional ventilation tunnel. The blower-type cooling fan is axially aligned with the core area of ​​the water tank radiator, forming a main heat dissipation channel that is consistent with the flow direction of the tunnel; the deviation angle between the generator air inlet and the air inlet axis is ≤15°, and the generator casing is provided with a generator exhaust port around the circumference. The gas discharged from the exhaust port enters the main heat dissipation channel through the guide shroud. The muffler is horizontally suspended from the top beam of the housing, and its exhaust direction is arranged at an acute angle of 30-45° with the axial direction of the air outlet. The length of the exhaust pipe is ≤0.5m and the surface is covered with an aerogel heat insulation layer.

3. The silent box-type diesel generator set as described in claim 1, characterized in that, The slats and serrations of the louvers are also coated with a hydrophobic-thermal conductive composite coating, which comprises, from the inside out: Anodized aluminum layer with a thickness of 50-80μm and a thermal conductivity ≥200W / (m·K); A 20-30μm thick fluorocarbon resin layer with a contact angle ≥150° and a surface energy ≤15mN / m; A water guide groove is provided at the root of the saw teeth, and the depth of the groove is 1 / 3 to 1 / 2 of the height of the saw teeth.

4. The silent box-type diesel generator set as described in claim 1, characterized in that, The depth of the water guide channel gradually increases from one end to the other along the length of the blade, with a gradient of 0.05-0.2 mm / cm. This causes the bottom of the water guide channel to tilt towards one side of the blade at a 3°-10° angle, allowing the water collected on the blade to converge along the tilt direction and be discharged from the blade tip.

5. The silent box-type diesel generator set as described in claim 2, characterized in that, The fairing includes: The wing plates are arranged parallel to the upper and lower sides of the generator exhaust port; An arc-shaped cover is positioned between the wing plates and covers the generator exhaust port. The wing and curved cover form a gradually narrowing flow channel to guide the airflow to accelerate, creating a low-pressure zone above the generator exhaust port, which prompts the gas inside the generator to be discharged from the exhaust port and carry away the heat.

6. The silent box-type diesel generator set as described in claim 1, characterized in that, The bending angles of the front and rear sections of the blade are 135°.

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