Diesel generator housing with noise reducing acoustic cotton

Abstract

The utility model belongs to diesel generator auxiliary equipment technical field, especially has the diesel generator shell with the noise reduction sound absorption cotton, including shell main part, still including elastic support subassembly, first noise reduction unit and second noise reduction unit, first noise reduction unit includes first rubber frame, sound-absorbing panel and first sound-absorbing cotton in proper order, second noise reduction unit includes second rubber frame, aluminium alloy sheet, calcium silicate punched sound-absorbing panel and second sound-absorbing cotton in proper order, adopt the collaborative design of elastic support subassembly and noise reduction unit, from vibration source and transmission path double damping, and the more comprehensive effect of noise reduction is formed, sound-absorbing panel sets up honeycomb vent, and the heat dissipation hole of shell main part forms the convection passage, solved the heat dissipation problem of traditional closed wrapping structure, guarantee generator operation stability, the detachable assembly of noise reduction unit, the replacement and maintenance of sound-absorbing cotton in later period are convenient, and can choose material quality according to actual noise reduction demand, adapts to different frequency noise scene.

Description

Technical Field

[0001] This utility model belongs to the technical field of diesel generator auxiliary equipment, specifically relating to a diesel generator housing with noise-reducing and sound-absorbing cotton. Background Technology

[0002] Diesel generators, as commonly used emergency power supply equipment, are widely used in many fields such as industrial production, construction, and emergency rescue. During their operation, they generate high-intensity composite noise, which mainly comes from multiple parts such as cylinder combustion impact, fan airflow disturbance, mechanical component friction, and exhaust pipe vibration. Moreover, the noise frequencies generated by different parts vary greatly, forming broadband noise pollution.

[0003] In existing technologies, to reduce the noise impact of diesel generators, some products adopt a structural design of pasting sound-absorbing cotton on the inside of the casing. However, this design has significant drawbacks in actual use: 1. To ensure the sound absorption effect, a closed wrapping structure is often used, which leads to heat dissipation obstruction and affects the stability of generator operation; 2. The sound-absorbing cotton of a single structure has an uneven absorption effect on noise of different frequencies, making it difficult to achieve full-band noise reduction; 3. There is a lack of effective vibration damping structure between the casing and the generator and the ground, and vibration transmission can easily cause the casing to resonate, further amplifying the noise.

[0004] To address the aforementioned problems, this utility model proposes a diesel generator housing with noise-reducing and sound-absorbing cotton. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a diesel generator housing with noise-reducing and sound-absorbing cotton, which is convenient to use, easy to maintain, and has a good noise reduction effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a diesel generator housing with noise reduction and sound absorption cotton, including a housing body, the housing body being composed of multiple frame sheet metal parts and supporting sheet metal parts fixed to the bottom of the frame sheet metal parts, heat dissipation holes being provided on some of the frame sheet metal parts, and also including an elastic support component, a first noise reduction unit and a second noise reduction unit.

[0007] The four sets of elastic support components are fixed diagonally to the bottom of the support sheet metal part;

[0008] The first noise reduction unit is detachably disposed inside the frame sheet metal part with heat dissipation holes, and the second noise reduction unit is detachably disposed inside the remaining frame sheet metal parts;

[0009] The first noise reduction unit includes a first rubber frame, a sound-absorbing plate, and a first sound-absorbing cotton in sequence. The first rubber frame is attached to the inner side of the frame sheet metal part, and the sound-absorbing plate has ventilation holes.

[0010] The second noise reduction unit includes, in sequence, a second rubber frame, an aluminum alloy plate, a calcium silicate perforated sound-absorbing plate, and a second sound-absorbing cotton. The second rubber frame is attached to the inner side of the frame sheet metal part.

[0011] As a preferred embodiment of this utility model, the vent holes are honeycomb-shaped.

[0012] As a preferred technical solution of this utility model, it also includes a first positioning screw and a first wing nut;

[0013] Four first positioning screws are fixed diagonally to the inner side of the frame sheet metal part and pass through the first rubber frame, the sound-absorbing plate and the first sound-absorbing cotton in sequence.

[0014] The first wing nut is attached to the protruding end of the first positioning screw by means of thread engagement.

[0015] As a preferred embodiment of this utility model, it also includes a second positioning screw and a second wing nut;

[0016] Four second positioning screws are fixed diagonally to the inner side of the frame sheet metal part and pass through the second rubber frame, the aluminum alloy plate, the calcium silicate perforated sound-absorbing plate and the second sound-absorbing cotton in sequence.

[0017] The second wing nut is attached to the extended end of the second positioning screw by means of thread engagement.

[0018] As a preferred embodiment of the present invention, the elastic support assembly includes a support foot disposed at the bottom of the support sheet metal part and an elastic support member disposed between the support foot and the support sheet metal part.

[0019] As a preferred embodiment of this utility model, the elastic support assembly further includes a threaded post and a locking nut;

[0020] The threaded post is fixed to the top of the support leg and passes through the support sheet metal part;

[0021] The locking nut is provided on the protruding end of the threaded post by means of thread engagement.

[0022] As a preferred embodiment of this utility model, the elastic support is a telescopic spring, and the telescopic spring is sleeved on the threaded column.

[0023] As a preferred embodiment of this utility model, a rubber block is bonded and fixed to the bottom surface of the support foot.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. The design of elastic support components and noise reduction units is adopted. The elastic support components weaken the transmission of generator vibration to the shell and the ground through elastic buffers. The rubber frame between the noise reduction unit and the shell suppresses resonance. The dual vibration reduction is achieved from both the vibration source and the transmission path. Combined with the built-in sound-absorbing cotton, the dual noise reduction of "vibration reduction + sound absorption" is achieved, and the noise reduction effect is more comprehensive.

[0026] 2. The sound-absorbing plate is equipped with honeycomb-shaped ventilation holes, which form a convection channel with the heat dissipation holes of the main body of the outer shell, solving the heat dissipation problem of traditional closed-enclosure structures and ensuring the stable operation of the generator;

[0027] 3. The noise reduction unit is detachable, which facilitates the replacement and maintenance of the sound-absorbing cotton in the future. The material can be flexibly selected according to the actual noise reduction needs to adapt to different frequency noise scenarios.

[0028] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is an exploded view of the first noise reduction unit in this utility model;

[0032] Figure 3 This is an exploded view of the second noise reduction unit in this utility model;

[0033] Figure 4 This utility model Figure 1 A magnified schematic diagram of the elastic support component in the diagram;

[0034] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0035] Figure 6 This utility model Figure 3 A magnified structural diagram at point B in the diagram.

[0036] In the diagram: 1. Outer shell; 11. Sheet metal frame; 111. Heat dissipation hole; 12. Support sheet metal; 2. Elastic support assembly; 21. Threaded post; 22. Support foot; 23. Locking nut; 24. Telescopic spring; 25. Rubber block; 3. First noise reduction unit; 31. First rubber frame; 32. Sound absorption plate; 321. Ventilation hole; 33. First sound-absorbing cotton; 4. Second noise reduction unit; 41. Second rubber frame; 42. Aluminum alloy plate; 43. Calcium silicate perforated sound-absorbing plate; 44. Second sound-absorbing cotton; 5. First positioning screw; 6. First wing nut; 7. Second positioning screw; 8. Second wing nut. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1-6 The present invention provides the following technical solution: a diesel generator housing with noise reduction and sound absorption cotton, including a housing body 1, which is composed of multiple frame sheet metal parts 11 and a support sheet metal part 12 fixed to the bottom of the frame sheet metal parts 11. Some of the frame sheet metal parts 11 are provided with heat dissipation holes 111. It also includes an elastic support component 2, a first noise reduction unit 3 and a second noise reduction unit 4.

[0039] Furthermore, by Figures 1-3 As shown, in this embodiment, four sets of elastic support components 2 are diagonally fixed to the bottom of the support sheet metal 12; the first noise reduction unit 3 is detachably disposed on the inner side of the frame sheet metal 11 with heat dissipation holes 111, and the second noise reduction unit 4 is detachably disposed on the inner side of the remaining frame sheet metal 11; the first noise reduction unit 3 includes a first rubber frame 31, a sound-absorbing plate 32 and a first sound-absorbing cotton 33 in sequence, the first rubber frame 31 is attached to the inner side of the frame sheet metal 11, and a vent hole 321 is provided on the sound-absorbing plate 32; the second noise reduction unit 4 includes a second rubber frame 41, an aluminum alloy plate 42, a calcium silicate perforated sound-absorbing plate 43 and a second sound-absorbing cotton 44 in sequence, the second rubber frame 41 is attached to the inner side of the frame sheet metal 11. After adopting the above scheme, when the diesel generator vibrates during operation, the vibration energy is first transmitted to the support sheet metal 12, and the elastic support component 2 absorbs the vibration energy through its own elastic deformation, avoiding rigid contact between the support sheet metal 12 and the mounting surface.

[0040] The diagonal distribution design can evenly bear the weight of the generator, ensure uniform vibration absorption, and prevent the supporting sheet metal parts 12 from tilting or resonating due to vibration, thereby reducing "vibration-induced structural noise" (such as low-frequency abnormal noise generated by the vibration of sheet metal parts).

[0041] The first noise reduction unit 3 is detachably located inside the frame sheet metal part 11 with heat dissipation holes 111. Addressing the pain point that "high-frequency noise is easily leaked through the heat dissipation holes 111", it achieves the advantage of ventilation without sound leakage. The first rubber frame 31 achieves sealing and vibration damping. It fits the inner side of the frame sheet metal part 11, filling the gap between the frame sheet metal part 11 and the first noise reduction unit 3 to prevent noise from leaking through the gap. On the other hand, the elasticity of the rubber material can absorb the vibration transmitted by the frame sheet metal part 11, reducing the "vibration-noise" conversion.

[0042] The first sound-absorbing cotton 33 (such as centrifugal glass wool or polyester fiber cotton) is attached to the sound-absorbing plate 32. After the high-frequency sound waves enter the fiber gaps of the first sound-absorbing cotton 33, the sound energy is converted into heat energy and consumed through fiber vibration and friction, thereby achieving deep suppression of high-frequency noise.

[0043] The ventilation holes 321 on the sound-absorbing plate 32 and the heat dissipation holes 111 on the frame sheet metal part 11 form a corresponding ventilation channel, ensuring that the hot air generated by the generator can be discharged through the heat dissipation holes 111 and the ventilation holes 321; at the same time, the sound-absorbing plate 32 is made of porous damping material (such as glass wool), which can dampen and attenuate the high-frequency noise (such as generator fan noise and mechanical friction high-frequency noise) that passes through.

[0044] The second noise reduction unit 4 is located inside the frame sheet metal part 11 without heat dissipation holes 111. It enhances the absorption of "low- and medium-frequency noise in areas without heat dissipation requirements" (such as generator cylinder vibration noise and exhaust low-frequency noise). The second rubber frame 41 works in synergy with the first rubber frame 31. It fits against the inner side of the frame sheet metal part 11, which on the one hand achieves tight fixation between the second noise reduction unit 4 and the frame sheet metal part 11, blocking sound leakage through gaps; on the other hand, it absorbs the vibration of the frame sheet metal part 11, preventing the vibration from being transmitted to subsequent noise reduction components and causing secondary noise.

[0045] The second sound-absorbing cotton 44 (such as high-density rock wool or gradient sound-absorbing cotton) is designed to address the longer wavelength of mid- and low-frequency sound waves. By increasing the contact area between the sound waves and the fibers through a denser fiber structure, the energy of mid- and low-frequency sound waves is fully consumed through fiber friction and pore reflection, ultimately achieving effective suppression of mid- and low-frequency noise. The noise that is not consumed by the second sound-absorbing cotton 44 enters the calcium silicate perforated sound-absorbing board 43.

[0046] The aluminum alloy plate 42 has high strength characteristics and can serve as the structural frame of the second noise reduction unit 4 to prevent the calcium silicate perforated sound-absorbing plate 43 and the second sound-absorbing cotton 44 from deforming due to generator vibration; at the same time, the high density of the aluminum alloy plate 42 can block the penetration of low and medium frequency noise.

[0047] The calcium silicate perforated sound-absorbing panel 43 has good mid-to-low frequency sound insulation performance and can block mid-to-low frequency noise. The perforated structure (such as a hole diameter of 3-5mm and a hole spacing of 8-10mm) can guide the unblocked mid-to-low frequency sound waves into the aluminum alloy plate 42 through the "Helmholtz resonance principle". When the sound waves pass through the perforation, resonance is generated. Some of the sound energy is consumed by the calcium silicate perforated sound-absorbing panel 43, and the remaining sound waves are continuously reflected by the aluminum alloy plate 42 and are eventually fully consumed by the calcium silicate perforated sound-absorbing panel 43.

[0048] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the vent 321 is a honeycomb-shaped hole. With the above solution, the honeycomb-shaped hole channels are regular and evenly distributed during use. This can ensure the maximum ventilation cross-sectional area while making the hot airflow form a stable laminar flow, avoiding the decrease in heat dissipation efficiency caused by airflow turbulence, ensuring that the heat generated by the generator is quickly and evenly discharged, and effectively preventing equipment overload caused by poor heat dissipation.

[0049] The multifaceted edge structure of the honeycomb holes can create multiple reflections and damping effects on the high-frequency noise passing through. Combined with the damping material of the sound-absorbing plate 32 and the absorption function of the first sound-absorbing cotton 33, the propagation path of high-frequency sound waves is further extended, and the attenuation effect of high-frequency noise is improved. Compared with ordinary round holes, the honeycomb holes have more noise reflections, and the high-frequency noise reduction effect is more significant.

[0050] Optionally, by Figure 1 , Figure 2 and Figure 5 As shown, this embodiment also includes a first positioning screw 5 and a first wing nut 6; four first positioning screws 5 are diagonally fixed to the inner side of the frame sheet metal 11 and pass through the first rubber frame 31, the sound-absorbing plate 32 and the first sound-absorbing cotton 33 in sequence; the first wing nut 6 is provided at the protruding end of the first positioning screw 5 by thread engagement. With the above scheme, when in use, the four first positioning screws 5 are diagonally fixed to the inner side of the frame sheet metal 11, and their distribution position is precisely matched with the diagonal installation points of the first noise reduction unit 3 (first rubber frame 31, sound-absorbing plate 32, first sound-absorbing cotton 33) to form a rigid positioning reference.

[0051] When assembling the first noise reduction unit 3, the first positioning screw 5 can pass through the preset mounting holes of each component in sequence. Through the gap fit between the cylindrical surface of the first positioning screw 5 and the hole wall of the component, the first rubber frame 31, the sound-absorbing plate 32, and the first sound-absorbing cotton 33 are forcibly guided to align along the axial direction of the first positioning screw 5. This ensures that the honeycomb ventilation holes 321 of the sound-absorbing plate 32 are completely aligned with the heat dissipation holes 111 of the frame sheet metal part 11. At the same time, it ensures that each layer of components fits tightly without relative offset, laying a structural foundation for the subsequent synergistic effect of noise reduction and heat dissipation.

[0052] The first wing nut 6 is connected to the protruding end of the first positioning screw 5 by a threaded engagement. During the tightening process, the end face of the first wing nut 6 will generate axial pressure on the outer surface of the first sound-absorbing cotton 33. This pressure is transmitted sequentially to the sound-absorbing plate 32 and the first rubber frame 31, ultimately causing the first rubber frame 31 to fit tightly against the inner surface of the frame sheet metal part 11. On the one hand, the pressure can eliminate the microscopic gap between the first rubber frame 31 and the frame sheet metal part 11, blocking the path of noise leakage from the gap. On the other hand, the first rubber frame 31 undergoes moderate elastic deformation under pressure, and its deformation stress can fill the fitting gap between the first positioning screw 5 and the component mounting hole, further enhancing the sealing effect. At the same time, the elastic deformation of the rubber can buffer the impact of generator vibration on the first noise reduction unit 3, preventing the components of each layer from loosening due to vibration.

[0053] When the first noise reduction unit 3 needs to be repaired or replaced, the first wing nut 6 can be manually unscrewed, and the first sound-absorbing cotton 33, the sound-absorbing plate 32, and the first rubber frame 31 can be taken out in sequence along the axis of the first positioning screw 5, which is convenient to operate.

[0054] Optionally, by Figure 1 , Figure 3 and Figure 6 As shown, this embodiment also includes a second positioning screw 7 and a second wing nut 8; four second positioning screws 7 are diagonally fixed to the inner side of the frame sheet metal 11 and pass through the second rubber frame 41, aluminum alloy plate 42, calcium silicate perforated sound-absorbing plate 43 and second sound-absorbing cotton 44 in sequence; the second wing nut 8 is provided at the protruding end of the second positioning screw 7 by thread engagement. With the above scheme, when in use, the four second positioning screws 7 are diagonally fixed to the inner side of the frame sheet metal 11, and their axial direction is precisely coincident with the preset mounting hole axis of the second noise reduction unit 4 (second rubber frame 41, aluminum alloy plate 42, calcium silicate perforated sound-absorbing plate 43, and second sound-absorbing cotton 44), forming a rigid positioning reference.

[0055] During assembly, the second positioning screw 7 passes through the mounting holes of the four layers of components in sequence. Through the clearance fit between the cylindrical surface of the second positioning screw 7 and the hole wall, the components of each layer are forcibly constrained to be aligned along the axis of the second positioning screw 7. This ensures that the second rubber frame 41 is completely fitted with the inner side of the frame sheet metal part 11 (without offset or sound leakage gap), and also ensures the precise interlayer position of the aluminum alloy plate 42, the calcium silicate perforated sound-absorbing plate 43, and the second sound-absorbing cotton 44. In particular, it ensures that the perforation structure of the calcium silicate perforated sound-absorbing plate 43 maintains the preset orientation (the perforation is directly opposite the second sound-absorbing cotton 44), avoiding misalignment between the perforation and the second sound-absorbing cotton 44 due to interlayer offset, and ensuring that mid-to-low frequency sound waves can effectively enter the interior of the calcium silicate perforated sound-absorbing plate 43 through the second sound-absorbing cotton 44.

[0056] The second wing nut 8 is connected to the extended end of the second positioning screw 7 by a threaded engagement. During the tightening process, the end face of the second wing nut 8 will generate axial pressure on the outer surface of the second sound-absorbing cotton 44. This pressure is transmitted sequentially to the calcium silicate perforated sound-absorbing plate 43, the aluminum alloy plate 42, and the second rubber frame 41, ultimately making the second rubber frame 41 tightly fit against the inner surface of the frame sheet metal part 11. On the one hand, the pressure can eliminate the micro gap between the second rubber frame 41 and the frame sheet metal part 11, blocking the path of noise leakage from the gap. On the other hand, the second rubber frame 41 undergoes moderate elastic deformation under pressure, and its deformation stress can fill the fitting gap between the second positioning screw 7 and the component mounting hole, further enhancing the sealing effect. At the same time, the elastic deformation of the rubber can buffer the impact of generator vibration on the second noise reduction unit 4, preventing the components of each layer from loosening due to vibration.

[0057] When the second noise reduction unit 4 needs to be repaired or replaced, simply unscrew the second wing nut 8 manually, and the second sound-absorbing cotton 44, calcium silicate perforated sound-absorbing plate 43, aluminum alloy plate 42 and second rubber frame 41 can be taken out in sequence along the axis of the second positioning screw 7. The operation is convenient.

[0058] Optionally, by Figure 1 and Figure 4 As shown in this embodiment, the elastic support component 2 includes a support foot 22 disposed at the bottom of the support sheet metal part 12 and an elastic support member disposed between the support foot 22 and the support sheet metal part 12. After adopting the above solution, when in use, the vibration energy generated by the diesel generator during operation is first transmitted to the support sheet metal part 12, and the support sheet metal part 12 transmits the vibration to the elastic support member between its bottom and the support foot 22.

[0059] Elastic supports absorb vibration energy through their own elastic deformation: on the one hand, their elastic material can convert some vibration energy into heat energy through intermolecular friction and deformation recovery process, thus achieving initial attenuation of vibration energy; on the other hand, for typical low- and medium-frequency vibrations of generators (such as cylinder reciprocating motion vibration and crankshaft rotation vibration), elastic supports can adjust their own stiffness (such as rubber hardness and spring stiffness coefficient) to match the vibration frequency, avoid resonance with the generator, further weaken the vibration transmission intensity, and prevent vibration energy from being directly transmitted to the mounting surface through rigid contact.

[0060] The four sets of elastic support components 2 are diagonally distributed to evenly distribute the weight to the four diagonal support points, preventing the support sheet metal parts 12 from bending and deforming due to localized stress concentration, and ensuring the structural integrity of the outer shell 1.

[0061] Optionally, by Figure 1 and Figure 4As shown, in this embodiment, the elastic support assembly 2 also includes a threaded post 21 and a locking nut 23. The threaded post 21 is fixed to the top of the support foot 22 and passes through the support sheet metal part 12. The locking nut 23 is provided at the protruding end of the threaded post 21 by thread engagement. With the above solution, during use, the elastic support (such as a rubber pad or spring) is provided between the support foot 22 and the support sheet metal part 12. Its vibration reduction effect depends on a reasonable pre-compression amount (pre-compression state). The engagement of the threaded post 21 and the locking nut 23 can precisely control the pre-compression of the elastic support. During initial assembly, the locking nut 23 is loosened so that the support foot 22 falls naturally and the elastic support is in a slightly pre-compression state. Then, the locking nut 23 is gradually tightened. The locking nut 23 pushes the support sheet metal part 12 downward to compress the elastic support through axial pressure until the compression amount of the elastic support reaches the preset value (calculated based on the weight of the generator).

[0062] When the elastic support needs to be replaced due to aging or wear, there is no need to disassemble the outer shell 1 or the supporting sheet metal 12. Simply loosen the locking nut 23 manually or with the help of a simple tool, lift the outer shell 1 upward along the axis of the threaded column 21 (or remove the support foot 22 downward), and the old elastic support can be removed and replaced with a new one.

[0063] Optionally, by Figure 1 and Figure 4 As shown in this embodiment, the elastic support is a telescopic spring 24, which is sleeved on the threaded post 21. With the above scheme, during use, the telescopic spring 24 is sleeved on the outside of the threaded post 21, and the cylindrical surface of the threaded post 21 forms a rigid guide reference for the telescopic spring 24. On the one hand, it restricts the displacement of the telescopic spring 24 in the radial direction (perpendicular to the axis of the threaded post 21), preventing the telescopic spring 24 from lateral tilting, offsetting or misaligning when the generator is vibrating, and ensuring that the telescopic spring 24 always expands and contracts along the axis of the threaded post 21. On the other hand, the threaded post 21 can support the inner ring of the telescopic spring 24, preventing the inner ring of the telescopic spring 24 from collapsing and becoming unstable due to long-term bearing of the generator weight, ensuring the structural integrity and deformation consistency of the telescopic spring 24, and laying a structural foundation for stable vibration reduction.

[0064] When the diesel generator vibrates during operation, the vibration energy is transmitted to the telescopic spring 24 through the supporting sheet metal 12. If the vibration causes the supporting sheet metal 12 to have a downward displacement tendency, the telescopic spring 24 is compressed and deformed by axial pressure, converting the vibration kinetic energy into the elastic potential energy of the telescopic spring 24. The elastic deformation of the telescopic spring 24 consumes some energy, reducing the transmission of vibration to the supporting foot 22 and the ground.

[0065] Preferably, by Figure 1 and Figure 4As shown in this embodiment, a rubber block 25 (such as nitrile rubber) is bonded and fixed to the bottom surface of the support foot 22. After adopting the above solution, the nitrile rubber has excellent elastic deformation capability and damping characteristics during use. After it is bonded and fixed to the bottom surface of the support foot 22, it can form a "spring + rubber" synergistic vibration reduction system with the telescopic spring 24 in the elastic support component 2: the telescopic spring 24 mainly absorbs the medium and high frequency vibrations generated by the generator operation, while the nitrile rubber block 25 can supplement the absorption of low frequency fine vibrations (such as low frequency pulsation of the generator cylinder) that are difficult to attenuate by the telescopic spring 24 through its own elastic deformation. At the same time, it uses the frictional damping between rubber molecules to convert the remaining vibration energy into heat energy consumption, further blocking the transmission of vibration to the mounting surface, avoiding the resonance of the mounting surface or secondary noise of surrounding equipment caused by vibration transmission, and significantly improving the overall vibration reduction effect.

[0066] In addition, the nitrile rubber bonding to the mounting surface (such as the ground) can significantly increase the static friction between the support foot 22 and the mounting surface. When the generator operates and generates lateral vibration or external impact, the rubber block 25 can effectively resist the sliding tendency of the support foot 22, prevent the equipment from shifting, ensure that the generator is always in the preset working position, and ensure operational stability.

[0067] Components not described in detail in this article are existing technologies.

[0068] The working principle and usage process of this utility model: When the diesel generator housing of this utility model is in use, when the diesel generator vibrates during operation, the vibration energy is first transmitted to the supporting sheet metal part 12. The elastic support component 2 absorbs the vibration energy through its own elastic deformation, thus avoiding rigid contact between the supporting sheet metal part 12 and the mounting surface.

[0069] The diagonal distribution design can evenly bear the weight of the generator, ensure uniform vibration absorption, and prevent the supporting sheet metal parts 12 from tilting or resonating due to vibration, thereby reducing "vibration-induced structural noise" (such as low-frequency abnormal noise generated by the vibration of sheet metal parts).

[0070] The first noise reduction unit 3 is detachably mounted inside the frame sheet metal part 11 with heat dissipation holes 111. Addressing the pain point that "high-frequency noise is easily leaked through the heat dissipation holes 111", it achieves the advantage of ventilation without sound leakage. The first rubber frame 31 achieves sealing and vibration damping. It fits the inner side of the frame sheet metal part 11, filling the gap between the frame sheet metal part 11 and the first noise reduction unit 3 to prevent noise from leaking through the gap. On the other hand, the elasticity of the rubber material can absorb the vibration transmitted by the frame sheet metal part 11, reducing the "vibration-noise" conversion.

[0071] The first sound-absorbing cotton 33 (such as centrifugal glass wool or polyester fiber cotton) is attached to the sound-absorbing plate 32. After the high-frequency sound waves enter the fiber gaps of the first sound-absorbing cotton 33, the sound energy is converted into heat energy and consumed through fiber vibration and friction, thereby achieving deep suppression of high-frequency noise.

[0072] The ventilation holes 321 on the sound-absorbing plate 32 and the heat dissipation holes 111 on the frame sheet metal part 11 form a corresponding ventilation channel, ensuring that the hot air generated by the generator can be discharged through the heat dissipation holes 111 and the ventilation holes 321; at the same time, the sound-absorbing plate 32 is made of porous damping material (such as glass wool), which can dampen and attenuate the high-frequency noise (such as generator fan noise and mechanical friction high-frequency noise) that passes through.

[0073] The second noise reduction unit 4 is located inside the frame sheet metal part 11 without heat dissipation holes 111. It enhances the absorption of "low- and medium-frequency noise in areas without heat dissipation requirements" (such as generator cylinder vibration noise and exhaust low-frequency noise). The second rubber frame 41 works in synergy with the first rubber frame 31. It fits against the inner side of the frame sheet metal part 11, which on the one hand achieves a tight fixation between the second noise reduction unit 4 and the frame sheet metal part 11, blocking sound leakage through gaps; on the other hand, it absorbs the vibration of the frame sheet metal part 11, preventing the vibration from being transmitted to subsequent noise reduction components and causing secondary noise.

[0074] The second sound-absorbing cotton 44 (such as high-density rock wool or gradient sound-absorbing cotton) is designed to address the longer wavelength of mid- and low-frequency sound waves. By increasing the contact area between the sound waves and the fibers through a denser fiber structure, the energy of mid- and low-frequency sound waves is fully consumed through fiber friction and pore reflection, ultimately achieving effective suppression of mid- and low-frequency noise. The noise that is not consumed by the second sound-absorbing cotton 44 enters the calcium silicate perforated sound-absorbing board 43.

[0075] The aluminum alloy plate 42 has high strength characteristics and can serve as the structural frame of the second noise reduction unit 4 to prevent the calcium silicate perforated sound-absorbing plate 43 and the second sound-absorbing cotton 44 from deforming due to generator vibration; at the same time, the high density characteristics of the aluminum alloy plate 42 can block the penetration of mid- and low-frequency noise.

[0076] The calcium silicate perforated sound-absorbing panel 43 has good mid-to-low frequency sound insulation performance and can block mid-to-low frequency noise. The perforated structure can guide the unblocked mid-to-low frequency sound waves into the aluminum alloy plate 42 through the "Helmholtz resonance principle". When the sound waves pass through the perforation, resonance is generated. Some of the sound energy is consumed by the calcium silicate perforated sound-absorbing panel 43, and the remaining sound waves are continuously reflected by the aluminum alloy plate 42 and are eventually fully consumed by the calcium silicate perforated sound-absorbing panel 43.

[0077] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A diesel generator housing with noise-reducing and sound-absorbing cotton, comprising a housing body (1), wherein the housing body (1) is composed of multiple frame sheet metal parts (11) and supporting sheet metal parts (12) fixed to the bottom of the frame sheet metal parts (11), and heat dissipation holes (111) are provided on some of the frame sheet metal parts (11), characterized in that: It also includes an elastic support component (2), a first noise reduction unit (3), and a second noise reduction unit (4); The four sets of elastic support components (2) are fixed diagonally to the bottom of the support sheet metal part (12); The first noise reduction unit (3) is detachably disposed inside the frame sheet metal part (11) with heat dissipation holes (111), and the second noise reduction unit (4) is detachably disposed inside the other frame sheet metal parts (11). The first noise reduction unit (3) includes a first rubber frame (31), a sound-absorbing plate (32) and a first sound-absorbing cotton (33) in sequence. The first rubber frame (31) is attached to the inner side of the frame sheet metal part (11), and a vent hole (321) is provided on the sound-absorbing plate (32). The second noise reduction unit (4) includes a second rubber frame (41), an aluminum alloy plate (42), a calcium silicate perforated sound-absorbing plate (43), and a second sound-absorbing cotton (44) in sequence. The second rubber frame (41) is attached to the inner side of the frame sheet metal part (11).

2. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 1, characterized in that: The vent (321) is a honeycomb pore.

3. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 1, characterized in that: It also includes a first positioning screw (5) and a first wing nut (6); The four first positioning screws (5) are fixed diagonally to the inner side of the frame sheet metal part (11) and pass through the first rubber frame (31), the sound-absorbing plate (32) and the first sound-absorbing cotton (33) in sequence. The first wing nut (6) is attached to the protruding end of the first positioning screw (5) by means of thread engagement.

4. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 1, characterized in that: It also includes a second positioning screw (7) and a second wing nut (8); The four second positioning screws (7) are fixed diagonally to the inner side of the frame sheet metal part (11) and pass through the second rubber frame (41), the aluminum alloy plate (42), the calcium silicate perforated sound-absorbing plate (43) and the second sound-absorbing cotton (44) in sequence. The second wing nut (8) is provided at the protruding end of the second positioning screw (7) by means of thread engagement.

5. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 1, characterized in that: The elastic support assembly (2) includes a support foot (22) disposed at the bottom of the support sheet metal part (12) and an elastic support member disposed between the support foot (22) and the support sheet metal part (12).

6. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 5, characterized in that: The elastic support assembly (2) also includes a threaded post (21) and a locking nut (23); The threaded post (21) is fixed to the top of the support foot (22) and passes through the support sheet metal part (12); The locking nut (23) is provided at the protruding end of the threaded post (21) by means of thread engagement.

7. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 6, characterized in that: The elastic support is a telescopic spring (24), and the telescopic spring (24) is sleeved on the threaded post (21).

8. The diesel generator housing with noise-reducing and sound-absorbing cotton according to claim 6, characterized in that: A rubber block (25) is glued and fixed to the bottom surface of the support foot (22).

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