Diesel generating set shell with noise reduction and heat dissipation functions

Abstract

The invention relates to the technical field of diesel generating sets, in particular to a diesel generating set shell with noise reduction and heat dissipation functions, which comprises a shell, an upper cover plate, a side cover plate and a magnetic attraction fixing block, the upper cover plate and the side cover plate are mounted on the shell through pin shafts, and the magnetic attraction fixing block is mounted in the shell and abuts against the upper cover plate and the side cover plate in a magnetic attraction manner. The air inlet end is installed at the upper end of the shell, the air outlet end is installed at the lower end of the shell, the flow guide pipe is connected between the air inlet end and the air outlet end, and the flow guide pipe is arranged close to a heating area when the diesel generating set works. The filter tip is installed on the connecting pipe in a threaded mode, so that the filter tip can be detached to be cleaned and replaced, the sealing performance of the air inlet end is guaranteed through tight abutting of a sealing soft cushion and an abutting plate, the filter tip is of a conical structure, impurities which cannot enter the filter tip slide under the action of gravity, and the filter tip is prevented from being damaged. Therefore, the condition that the filter tip is blocked by sundries is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of diesel generator sets, and in particular to a diesel generator set housing with noise reduction and heat dissipation functions. Background Art

[0002] A diesel generator is a small power generation equipment, which refers to a power machine that uses diesel as fuel and a diesel engine as the prime mover to drive the generator to generate electricity. The complete unit is generally composed of a diesel engine, a generator, a control box, a fuel tank, a storage battery for starting and control, a protective device, an emergency cabinet and other components.

[0003] The existing diesel generator housing has the following defects during use: First, in order to prevent the fan from being invaded by debris and causing pipe blockage or fan failure, the existing diesel generator housing will be equipped with corresponding shutters to block the entry of debris. However, when the diesel generator is operating in a desert area, the outside air contains a large amount of tiny sand, and the shutters have large gaps, making it very easy for sand to enter through the shutter gaps and cause pipe blockage or fan failure. Second, since most existing cooling methods require the use of high-speed fans, it is very easy to cause air turbulence and generate loud noise, which has a significant negative impact on the working environment of the staff. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that sand can easily enter through the gaps in the shutters, causing pipeline blockage or fan failure and air flow turbulence to generate large noise, and to propose a diesel generator set casing with noise reduction and heat dissipation functions.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The diesel generator housing with noise reduction and heat dissipation functions includes: A housing, wherein an upper cover plate and a side cover plate are mounted on a pin shaft of the housing; A magnetic fixing block installed in the housing and magnetically abutting against the upper cover plate and the side cover plate; An air inlet end mounted on the upper end of the housing; An air outlet installed at the lower end of the housing; The air inlet end and the air outlet end are matched with filter components; The filtering component comprises: A connecting pipe fixedly connected to the housing; A filter tip threadably mounted on the connecting tube; A guide pipe is connected between the air inlet end and the air outlet end, and the guide pipe is arranged close to the heat generation area when the diesel generator set is in operation. A semiconductor cooler is arranged on the outer wall of one end of the guide pipe close to the air inlet end, and a silencer guide plate is arranged on the inner wall of one end of the guide pipe close to the air outlet end. The part of the guide pipe close to the heat generation area when the diesel generator set is in operation is a serpentine structure.

[0006] Preferably, two magnetic fixing blocks are provided, and the magnetic fixing blocks are of a cubic structure.

[0007] Preferably, a cooling fan is provided in both the air inlet end and the air outlet end, the cooling fan adopts backward curved blades, and the working area of ​​the air outlet end is 1.8 times the working area of ​​the air inlet end.

[0008] Preferably, the air inlet end and the air outlet end are matched with filter components.

[0009] Preferably, the filter assembly further comprises: A resistance plate fixedly connected to the inner wall of the filter tip; A sealing cushion is fixedly connected to the connecting pipe and movably abuts against the abutment plate.

[0010] Preferably, the contact plate is a flat annular structure, the contact plate is consistent with the inner diameter of the connecting tube, the sealing cushion has the same geometric structure as the contact plate, the filter operating part is a hollow conical structure, and the filter operating part is a hollow cylindrical structure.

[0011] Preferably, a semiconductor cooler is provided on the outer wall of one end of the guide tube close to the air inlet end, a silencer guide plate is provided on the inner wall of one end of the guide tube close to the air outlet end, and the portion of the guide tube close to the heating area when the diesel generator set is in operation is a serpentine structure.

[0012] Preferably, the silencer guide plate is composed of a coaxially stacked cylinder and a cone, the top end face of the cylinder completely overlaps with the bottom face of the cone to form a continuous transition geometry, and the axis of the cone and the axis of the cylinder remain strictly collinear, the end of the silencer guide plate in contact with the inner wall of the shell is a shock-absorbing layer, the interior of the silencer guide plate is filled with porous sound-absorbing material, a plurality of curved guide holes are provided on the silencer guide plate, and an expansion muffler is installed on the silencer guide plate.

[0013] Preferably, the air inlet end is a gradually converging and expanding section, and the air outlet end is a gradually expanding section.

[0014] Preferably, the bends of the guide pipe close to the heat generation area when the diesel generator set is in operation all adopt rounded transition, and a plurality of guide plates are arranged in the portion of the guide pipe close to the heat generation area when the diesel generator set is in operation.

[0015] Compared with the prior art, the present invention has the following advantages: 1. In the present invention, the filter tip is threadedly installed on the connecting tube so that the filter tip can be disassembled for cleaning and replacement, and the tight contact between the sealing cushion and the contact plate ensures the sealing of the air inlet end. The filter tip has a conical structure, so that the debris that cannot enter the inside of the filter tip slides under the action of gravity, thereby reducing the situation where the filter tip is blocked by debris.

[0016] 2. The guide pipe in the present invention optimizes the airflow characteristics by gradually changing the cross-sectional area of ​​the pipe through multiple gradually contracting and expanding sections, thereby reducing turbulence and airflow separation and suppressing broadband noise. A silencer guide plate is provided at the air outlet end, and porous sound-absorbing material is filled inside to absorb sound wave energy. The multiple guide holes opened thereon are all curved in shape, which helps to reduce airflow resistance and guide the direction of airflow. The expansion muffler and anti-phase sound waves are used to offset specific frequency noise, which helps to reduce the noise generated by the operation of the cooling system.

[0017] 3. In the present invention, the air inlet is installed at the upper end of the shell, and the air outlet is installed at the lower end of the shell, which is more in line with the climate change in the desert area. At the same time, a semiconductor cooler is arranged at the air inlet to reduce the air temperature at the air inlet, which helps to improve the heat dissipation effect of the diesel generator set operating in the desert area.

[0018] 4. In the present invention, the air inlet end is a gradually contracting and expanding section, and the air outlet end is a gradually expanding section. The special structure mentioned above is used to gradually change the cross-sectional areas of the air inlet end and the air outlet end to optimize the airflow characteristics, thereby reducing the noise generated by the airflow. At the same time, the working area of ​​the air outlet end is larger than the working area of ​​the air inlet end, which effectively avoids airflow short circuit and helps to ensure the heat dissipation effect of the diesel generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention; Figure 2 For the present invention Figure 1 Another perspective structural diagram proposed in ; Figure 3 For the present invention Figure 1 A first sectional view as proposed in FIG. Figure 4 For the present invention Figure 3 Schematic diagram of the local enlarged structure of A proposed in; Figure 5 For the present invention Figure 1 A second cross-sectional view as proposed in FIG. Figure 6 For the present invention Figure 5 Schematic diagram of the local enlarged structure of A proposed in; Figure 7 For the present invention Figure 1 The third sectional view presented in FIG.

[0020] In the figure: 1. Upper cover; 2. Side cover; 3. Shell; 4. Magnetic fixing block; 5. Air inlet end; 6. Air outlet; 7. guide tube; 701. semiconductor refrigerator; 702. muffler guide plate; 8. Cooling fan; 9. Filter assembly; 901. Connecting tube; 902. Filter tip; 903. Resistance plate; 904. Sealing cushion. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-Figure 7 The diesel generator housing with noise reduction and heat dissipation function includes an upper cover plate 1, a side cover plate 2, a housing 3, a magnetic fixing block 4, an air inlet end 5, an air outlet end 6, a cooling fan 8, a filter assembly 9 and a guide pipe 7. The components are arranged as follows: The upper cover plate 1 and the side cover plate 2 are installed on the pin shaft of the shell 3, and the magnetic fixing block 4 is installed in the shell 3 and is magnetically attracted to the upper cover plate 1 and the side cover plate 2. There are two magnetic fixing blocks 4, and the magnetic fixing blocks 4 are cubic structures. The upper cover plate 1 and the side cover plate 2 are fixed and limited by magnetic fixing, so that the upper cover plate 1 and the side cover plate 2 can be directly opened when maintenance is needed, so as to provide sufficient working space for the staff.

[0023] Since the temperature of the area far from the ground in the desert during the day is lower than that of the area close to the ground, and the temperature is lower at night and no heat dissipation is needed, the air inlet 5 is installed at the upper end of the shell 3 and the air outlet 6 is installed at the lower end of the shell 3 to match the special weather environment of the desert. The working area of ​​the air outlet 6 is 1.8 times the working area of ​​the air inlet 5, so as to ensure that the air outlet efficiency is higher than the air inlet efficiency, so as to avoid air flow short circuit. A cooling fan 8 is provided in the air inlet 5 and the air outlet 6. The cooling fan 8 adopts backward curved blades. The backward curved blade design allows the air flow to flow smoothly along the trailing edge of the blade, forming a more stable flow path and reducing the generation of turbulence and vortexes. This flow characteristic reduces the pressure pulsation caused by fluid disturbance, thereby reducing noise, and a rubber shock absorber is provided in the cooling fan 8 to absorb vibration energy through the rubber shock absorber, reduce the secondary noise caused by mechanical vibration transmission, and improve the overall noise reduction effect.

[0024] Based on the arrangement of the air inlet end 5 and the air outlet end 6, in order to prevent dust in the air from entering the air inlet end 5 and the air outlet end 6, a filter assembly 9 is matched with the air inlet end 5 and the air outlet end 6; In a further implementation method, the filter assembly 9 includes a connecting tube 901, a filter tip 902, a resisting plate 903 and a sealing cushion 904, and each component is arranged as follows: The connecting pipe 901 is fixedly connected to the housing 3, and the filter 902 is threadedly installed on the connecting pipe 901. The threaded connection between the connecting pipe 901 and the filter 902 makes the filter 902 detachable, so that the staff can regularly replace the filter 902, thereby ensuring the effectiveness of the filter 902 during operation, which helps to ensure the maintainability of the filter assembly 9. The working part of the filter 902 is a hollow conical structure, and the working part of the filter 902 is a hollow cylindrical structure, so that the sand and dust blocked by the filter 902 slide down due to gravity, thereby reducing the clogging of the filter 902 by sand and dust, which helps to extend the service life of the filter 902. The cooling fan 8 of the air inlet end 5 rotates in the opposite direction to clean the corresponding filter 902, thereby blowing away the sand and dust on the outer wall of the filter 902; The contact plate 903 is fixedly connected to the inner wall of the filter 902, and the sealing gasket 904 is fixedly connected to the connecting tube 901. The sealing gasket 904 and the contact plate 903 are movably abutted against each other. The sealing gasket 904 is squeezed by the contact plate 903 to deform the sealing gasket 904, thereby improving the fit between the sealing gasket 904 and the contact plate 903, thereby ensuring the sealing between the connecting tube 901 and the filter 902. The contact plate 903 is a flat annular structure. The inner diameter of the contact plate 903 and the connecting tube 901 are consistent, and the sealing gasket 904 and the contact plate 903 have the same geometric structure.

[0025] The guide pipe 7 is connected between the air inlet end 5 and the air outlet end 6. The guide pipe 7 is arranged near the heating area when the diesel generator set is in operation. It should be noted that the guide pipe 7 is made of copper, and its good thermal conductivity is used to ensure the heat exchange effect between the guide pipe 7 and the diesel generator set. The air inlet end 5 is a gradually contracting and expanding section. The gradually contracting section is used to guide the external air to enter the air inlet end 5 evenly and accelerate, reducing the inlet turbulence noise. The gradually expanding section connected thereto diffuses the airflow before entering the inside of the guide pipe 7 to reduce the noise generated by local high-speed flow. The air outlet end 6 is a gradually expanding section, which slowly diffuses and discharges the high-temperature air to reduce the exhaust noise and the impact sound of the airflow. The part of the guide pipe 7 close to the heating area when the diesel generator set is in operation Rounded corners are used for transition at the corners to reduce the resistance of air flowing in the guide pipe 7, thereby reducing turbulence and separation, and a plurality of guide plates are provided in the portion of the guide pipe 7 close to the heating area when the diesel generator set is in operation to guide the airflow and disrupt the periodic vortex to avoid the noise generated by the periodic vortex in the airflow, and a semiconductor cooler 701 is provided on the outer wall of one end of the guide pipe 7 close to the air inlet end 5 to reduce the air temperature at the air inlet end 5 so that the air can better exchange heat with the operating area of ​​the diesel generator set, and the portion of the guide pipe 7 close to the heating area when the diesel generator set is in operation is a serpentine structure to increase the contact area between the guide pipe 7 and the operating area of ​​the diesel generator set.

[0026] A sound-absorbing guide plate 702 is arranged on the inner wall of one end of the guide pipe 7 close to the air outlet end 6. The sound-absorbing guide plate 702 is composed of a coaxially stacked cylinder and a cone. The top end face of the cylinder completely coincides with the bottom face of the cone to form a continuous transition geometry, and the axis of the cone and the axis of the cylinder are strictly collinear. The end of the sound-absorbing guide plate 702 in contact with the inner wall of the shell 3 is a shock-absorbing layer, so that the airflow contacts different positions of the sound-absorbing guide plate 702 at different times, thereby reducing the impact of the airflow on the sound-absorbing guide plate 702 in the same time period. At the same time, the shock-absorbing layer reduces the noise generated by the structural transmission driven by the impact of the airflow. The interior of the sound-absorbing guide plate 702 is filled with porous sound-absorbing material The porous sound-absorbing material is glass wool. The fibers inside the glass wool are fluffy and interlaced, forming a large number of tiny pores. After the sound waves enter, they will rub, reflect and refract with the fibers and air molecules in the pores, and the sound energy will be converted into heat energy loss. A plurality of curved guide holes are provided on the silencer guide plate 702, which change the airflow from turbulent to orderly flow, thereby reducing eddy currents and wind resistance. An expansion muffler is installed on the silencer guide plate 702. The expansion muffler consists of an expansion chamber, a connecting pipe and a partition. A neck structure is formed between the expansion chamber and the connecting pipe. By adjusting the neck length and the cavity volume, a significant sound absorption effect can be produced at the resonance frequency, thereby offsetting the low-frequency noise.

[0027] The present invention can be explained by the following operation mode: The cooling fan 8 at the air inlet 5 is started to introduce the outside air filtered by the filter 902 into the air inlet 5, and the air inlet 5 is cooled by the semiconductor refrigerator 701, so as to ensure that the air entering the guide pipe 7 is cold air, and the cold air and the heat generating area of ​​the diesel generator set are heat exchanged and cooled; The cooling fan 8 at the air outlet 6 is started, and the air flows into the air outlet 6 through the guide hole. At the same time, the porous sound-absorbing material filled inside is used to emit and absorb the noise generated by the air flow, thereby reducing the noise generated when the hot air is discharged, so that the hot air heated by the diesel generator set enters the air outlet 6 and is discharged through the filter 902; When the filter tip 902 needs to be disassembled, the filter tip 902 is rotated to be separated from the connecting tube 901, thereby completing the disassembly of the filter tip 902, and a new filter tip 902 is threadedly installed on the connecting tube 901, so that the abutment plate 903 squeezes the sealing cushion 904, thereby ensuring the sealing of the connection between the connecting tube 901 and the filter tip 902; When the diesel generator set needs to be repaired, the side cover plate 2 is pulled to make the side cover plate 2 away from the magnetic fixing block 4, and then the upper cover plate 1 is pushed to make the upper cover plate 1 away from the magnetic fixing block 4 to provide sufficient space for the staff to perform maintenance operations.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A diesel generator housing with noise reduction and heat dissipation functions, characterized in that: include: A housing (3), wherein an upper cover plate (1) and a side cover plate (2) are mounted on a pin shaft on the housing (3); A magnetic fixing block (4) installed in the housing (3) and magnetically abutting against the upper cover plate (1) and the side cover plate (2); An air inlet end (5) mounted on the upper end of the housing (3); An air outlet (6) installed at the lower end of the housing (3); The air inlet end (5) and the air outlet end (6) are matched with filter components (9); The filtering component (9) comprises: A connecting pipe (901) fixedly connected to the housing (3); A filter tip (902) threadably mounted on the connecting tube (901); A guide pipe (7) is connected between the air inlet end (5) and the air outlet end (6); the guide pipe (7) is arranged close to a heating area when the diesel generator set is in operation; a semiconductor cooler (701) is arranged on an outer wall of one end of the guide pipe (7) close to the air inlet end (5); a silencer guide plate (702) is arranged on an inner wall of one end of the guide pipe (7) close to the air outlet end (6); and a portion of the guide pipe (7) close to the heating area when the diesel generator set is in operation is a serpentine structure.

2. The diesel generator housing with noise reduction and heat dissipation function according to claim 1 is characterized in that: Two magnetic fixing blocks (4) are provided, and the magnetic fixing blocks (4) are of a cubic structure.

3. The diesel generator housing with noise reduction and heat dissipation function according to claim 1 is characterized in that: A cooling fan (8) is provided at both the air inlet end (5) and the air outlet end (6); the cooling fan (8) uses backward curved blades; and the working area of ​​the air outlet end (6) is 1.8 times the working area of ​​the air inlet end (5).

4. The diesel generator housing with noise reduction and heat dissipation function according to claim 1 is characterized in that: The filtering component (9) further comprises: A resistance plate (903) fixedly connected to the inner wall of the filter tip (902); A sealing cushion (904) fixedly connected to the connecting pipe (901) and movably abutting against the abutting plate (903).

5. The diesel generator housing with noise reduction and heat dissipation function according to claim 4 is characterized in that: The abutment plate (903) is a flat annular structure. The inner diameter of the abutment plate (903) is consistent with that of the connecting tube (901). The sealing cushion (904) has the same geometric structure as the abutment plate (903). The working part of the filter tip (902) is a hollow conical structure. The working part of the filter tip (902) is a hollow cylindrical structure.

6. The diesel generator housing with noise reduction and heat dissipation function according to claim 1 is characterized in that: The silencer guide plate (702) is composed of a coaxially stacked cylinder and cone, the top end surface of the cylinder and the bottom surface of the cone completely overlap to form a continuous transition geometric body, and the axis of the cone and the axis of the cylinder remain strictly collinear, the end of the silencer guide plate (702) in contact with the inner wall of the shell (3) is a shock-absorbing layer, the interior of the silencer guide plate (702) is filled with porous sound-absorbing material, a plurality of curved guide holes are opened on the silencer guide plate (702), and an expansion muffler is installed on the silencer guide plate (702).

7. The diesel generator housing with noise reduction and heat dissipation function according to claim 1 is characterized in that: The air inlet end (5) is a gradually contracting and expanding section, and the air outlet end (6) is a gradually expanding section.

8. The diesel generator housing with noise reduction and heat dissipation function according to claim 1 is characterized in that: The guide pipe (7) has a portion of bends close to the heat generation area when the diesel generator set is in operation, and a plurality of guide vanes are provided in the portion of the guide pipe (7) close to the heat generation area when the diesel generator set is in operation.

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