Silent diesel generator set

Abstract

The application relates to the field of generator set noise reduction technology, in particular to a mute diesel generator set which comprises a mute box body and a mute door, the lower end of the mute box body is fixedly connected with support feet at four corners, an exhaust pipe mounting groove is arranged at the upper end of the mute box body, an exhaust guide pipe is connected in the exhaust pipe mounting groove, the bottom of the exhaust guide pipe is fixedly connected with a generator set host, and the generator set host is embedded in the mute box body, a host clamping and fixing mechanism is fixedly connected with the lower box wall of the mute box body, through-penetration type fixing screw holes are arranged at the lower part of the left end and the lower part of the right end of the mute box body, and a door embedding groove is arranged at the front edge of the mute box body. The adjustable external clamping and fixing structure and the composite multistage sound-absorbing and sound-insulating structure are arranged, the operation and installation stability of the generator set and the overall mute protection capability are considered, the small maintenance door structure is reserved, and the operation convenience of daily maintenance of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of generator set noise reduction technology, specifically a silent diesel generator set. Background Technology

[0002] Diesel generator sets generate significant mechanical and exhaust noise during operation. To reduce their environmental impact, various silent diesel generator sets have emerged in the existing technology.

[0003] According to a public announcement (CN209053689U), a silent diesel generator set includes a main body and rollers. The front surface of the main body has a heat dissipation vent, and a baffle is installed inside the vent. The inner wall of the main body is lined with a sound insulation layer. A first spring is wound around the outer surface of a rubber rod. The rollers are located below the main body, and a limiting plate is provided on the outer side of the rollers. Second springs are evenly distributed on the outer surface of the limiting plate, and a side plate is fixedly connected to the outer end of each second spring. A rubber block connected to the lower surface of the main body is provided on the outer side of the side plate, and a support rod is fixedly connected to the lower surface of the rubber block. An oil inlet is installed on the upper right surface of the main body, and a cap is engaged at the top of the oil inlet.

[0004] Of the aforementioned devices, firstly, the unit's fixed operation is cumbersome, requiring the opening of the soundproof door to complete the clamping and adjustment of the main unit, resulting in poor operational convenience and easy scratching and damage to the unit during the adjustment process; secondly, the sound insulation structure design is imperfect, allowing noise to easily leak from the gaps between the soundproof door and the enclosure, and its effect on blocking and attenuating mid-to-high frequency and mid-to-low frequency noise generated by the unit's operation is limited, resulting in poor noise reduction performance; thirdly, the exhaust system's sealing performance is insufficient, and exhaust leakage can easily contaminate and damage the sound insulation components inside the enclosure, while exhaust airflow noise is not effectively treated, further affecting the noise reduction effect.

[0005] In view of this, we propose a silent diesel generator set. Summary of the Invention

[0006] The purpose of this invention is to provide a silent diesel generator set, which solves the problems of cumbersome fixed operation, poor noise reduction performance, exhaust leakage damaging parts, and ineffective noise control of existing generator sets.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A silent diesel generator set includes a silent housing and a silent door. Support feet are fixedly connected to the four lower corners of the silent housing. An exhaust pipe mounting groove is provided at the upper end of the silent housing, and an exhaust duct is inserted into the exhaust pipe mounting groove. The bottom of the exhaust duct is fixedly connected to the generator set main unit, which is embedded inside the silent housing. A main unit clamping and fixing mechanism is fixedly connected to the lower wall of the silent housing. Through-hole fixing screws are provided at the lower left and lower right ends of the silent housing. A main muffler is fixedly connected to the middle of the rear wall of the silent housing, and multiple muffler holes are provided in the wall of the main muffler. A door embedding groove is provided at the front edge of the silent housing.

[0008] Preferably, a maintenance hatch is mounted on the front center of the silent door via a hinge, and an opening and closing handle is fixedly provided on the lower front of the maintenance hatch. A door sealing frame is fixedly connected to the rear edge of the silent door, and the silent door is embedded in the front opening of the silent enclosure through the door sealing frame.

[0009] Preferably, the inner walls of the soundproof enclosure and the soundproof door are both fixedly connected with sound insulation protective layers, and the interiors of the soundproof enclosure and the soundproof door are both filled with sound insulation and noise reduction cotton.

[0010] Preferably, the host clamping and fixing mechanism includes a fixed base plate and an adjusting screw. The front and rear parts of the lower plate wall of the fixed base plate are provided with base plate mounting grooves, and the front and rear parts of the upper end of the fixed base plate are provided with through sliding grooves. Multiple anti-slip resistance pads are fixedly connected to the upper end of the fixed base plate.

[0011] Preferably, two adjusting screws are symmetrically arranged. One end of each adjusting screw is fixedly connected to an adjusting handle, and the other end of each adjusting screw is movably connected to a clamping rod via a bearing. The front end and rear end of the clamping rod are fixedly connected to a main unit positioning clamping block. The inner wall of the main unit positioning clamping block is fixedly connected to an anti-scratch rubber pad, and the fixed base plate is fixedly connected to the middle of the lower wall of the silent enclosure.

[0012] Preferably, the adjusting screw passes through the fixing screw hole on the side of the silent enclosure, and the adjusting screw is threadedly engaged with the fixing screw hole to realize the left and right adjustment of the main unit positioning clamp.

[0013] Preferably, the anti-slip resistance pad is in close contact with the bottom of the generator set main unit.

[0014] Preferably, the exhaust duct is sealed to the exhaust port of the generator set host, and the upper end of the exhaust duct extends to the top of the soundproof enclosure.

[0015] Preferably, multiple silencing holes are evenly distributed on the circumferential wall of the main silencer cylinder, and the silencing holes penetrate the inner and outer walls of the main silencer cylinder.

[0016] Preferably, the sound insulation protective layer is adhered to and covers all the inner walls of the soundproof enclosure and the soundproof door, and the sound insulation and noise reduction cotton is evenly filled in the internal cavity of the soundproof enclosure and the soundproof door.

[0017] By employing the above technical solution, the present invention provides a silent diesel generator set. It possesses at least the following beneficial effects: 1. This invention, through the cooperation of the adjusting screw and the fixed screw hole, along with the adjusting handle, clamping rod and main unit positioning block, enables the adjusting screw to horizontally adjust the main unit positioning block through threaded transmission, realizing convenient operation of external adjustment and internal clamping without opening the silent door. At the same time, the anti-scratch rubber pad can prevent the unit from being scratched and improve the fixing stability.

[0018] 2. This invention, through the combination of sound insulation protective layer and sound insulation and noise reduction cotton, along with the door sealing frame and door embedding groove, enables the sound insulation protective layer and sound insulation and noise reduction cotton to absorb and block the noise generated by the unit operation in layers. The door and the box form a sealed structure to prevent noise leakage and significantly improve the quietness performance.

[0019] 3. The present invention achieves a sealed connection between the exhaust duct and the generator set main unit, in conjunction with the main muffler and the muffler through hole, so that the exhaust duct can seal and guide the exhaust gas out, avoiding exhaust leakage and damage to the sound insulation components. The muffler through hole can divide the airflow and attenuate exhaust noise, further optimizing the quietness effect. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention, form part of this application: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a partial cross-section of the structure in this invention; Figure 3 This is a schematic diagram of the disassembled structure of the soundproof enclosure and the soundproof door in this invention; Figure 4 This is a schematic diagram of the main unit clamping and fixing mechanism and its partially enlarged combined connection structure in this invention; Figure 5 This is a magnified structural diagram of section A in this invention.

[0021] In the diagram: 1. Support foot; 2. Main unit clamping and fixing mechanism; 3. Exhaust duct; 4. Silent door; 5. Silent enclosure; 6. Generator set main unit; 7. Main muffler; 8. Muffler through hole; 9. Inspection hatch; 10. Opening and closing handle; 11. Exhaust pipe mounting slot; 12. Fixing screw hole; 13. Sound insulation and noise reduction cotton; 14. Door body embedded slot; 15. Sound insulation protective layer; 16. Door body sealing frame; 21. Fixed base plate; 22. Base plate mounting slot; 23. Sliding groove; 24. Anti-slip resistance pad; 25. Adjusting handle; 26. Main unit positioning clamp; 27. Anti-scratch rubber pad; 28. Clamping connecting rod; 29. ​​Adjusting screw. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] A silent diesel generator set, such as Figures 1-5 As shown, the device includes a soundproof enclosure 5 and a soundproof door 4. The four corners of the lower end of the soundproof enclosure 5 are fixedly connected to support feet 1. The upper end of the soundproof enclosure 5 is provided with an exhaust pipe mounting groove 11. An exhaust pipe 3 is inserted into the exhaust pipe mounting groove 11. The bottom of the exhaust pipe 3 is fixedly connected to the generator set host 6, and the generator set host 6 is embedded inside the soundproof enclosure 5. The lower wall of the soundproof enclosure 5 is fixedly connected to the host clamping and fixing mechanism 2. The lower left and lower right ends of the soundproof enclosure 5 are provided with through-hole fixing screw holes 12. The middle of the rear wall of the soundproof enclosure 5 is fixedly connected to the main muffler 7. The wall of the main muffler 7 is provided with multiple muffler holes 8. The front edge of the soundproof enclosure 5 is provided with a door embedding groove 14.

[0024] A maintenance hatch 9 is hinged and installed at the front center of the soundproof door 4. An opening and closing handle 10 is fixedly installed at the lower front of the maintenance hatch 9. A door sealing frame 16 is fixedly connected to the rear edge of the soundproof door 4. The soundproof door 4 is embedded in the front opening of the soundproof enclosure 5 through the door sealing frame 16. The tight fit between the door sealing frame 16 and the door embedding groove 14 ensures that the soundproof door 4 and the front opening of the soundproof enclosure 5 form a sealed connection, preventing noise leakage from gaps. At the same time, the maintenance hatch 9 located in the middle of the soundproof door 4, together with the opening and closing handle 10, allows for daily inspection and maintenance of the generator set main unit 6 without opening the entire soundproof door 4, improving the convenience of operation.

[0025] The inner walls of the soundproof enclosure 5 and the soundproof door 4 are both fixedly connected with sound insulation protective layers 15. The interiors of the soundproof enclosure 5 and the soundproof door 4 are filled with sound insulation and noise reduction cotton 13. The sound insulation protective layer 15, as the first acoustic barrier, can reflect and absorb the medium and high frequency noise generated by the generator set host 6 during operation. The sound insulation and noise reduction cotton 13 filled inside uses a porous fiber structure to viscously lose and attenuate the remaining sound energy. The two are used together to form a double-layer sound insulation structure, which significantly reduces the noise energy radiated outward from the enclosure wall and door, and achieves a silent effect.

[0026] The main unit clamping and fixing mechanism 2 includes a fixed base plate 21 and an adjusting screw 29. The front and rear parts of the lower plate wall of the fixed base plate 21 are provided with base plate mounting grooves 22. The front and rear parts of the upper end of the fixed base plate 21 are provided with through sliding grooves 23. Multiple anti-slip resistance pads 24 are fixedly connected to the upper end of the fixed base plate 21. The anti-slip resistance pads 24 are made of rubber and their function is to fit against the bottom of the generator set main unit 6, increase the friction between the generator set main unit 6 and the fixed base plate 21, help improve the fixing stability of the generator set main unit 6, and prevent shaking during the operation of the unit.

[0027] Two adjusting screws 29 are symmetrically arranged. One end of each adjusting screw 29 is fixedly connected to an adjusting handle 25, and the other end of the adjusting screw 29 is movably connected to a clamping rod 28 via a bearing. The front and rear ends of the clamping rod 28 are fixedly connected to a main unit positioning clamping block 26. The inner wall of the main unit positioning clamping block 26 is fixedly connected to an anti-scratch rubber pad 27. The fixed base plate 21 is fixedly connected to the middle of the lower wall of the soundproof enclosure 5. The two symmetrically arranged adjusting screws 29 are screwed into the fixed screw holes 12 on the left and right sides of the soundproof enclosure 5, respectively, driving the clamping rod 28 and the main unit positioning clamping block 26 to move synchronously towards the center, thereby achieving the centering and clamping of the generator set main unit 6.

[0028] The adjusting screw 29 passes through the fixing screw hole 12 on the side of the silent enclosure 5, and the adjusting screw 29 is threaded into the fixing screw hole 12 to realize the left and right adjustment of the main unit positioning clamp 26. The operator only needs to turn the adjusting handle 25 on the outside of the enclosure to complete the left and right displacement of the main unit positioning clamp 26 without opening the silent door 4, thus realizing the convenient operation of external adjustment and internal clamping.

[0029] The anti-slip resistance pad 24 is in close contact with the bottom of the generator set host 6. When the generator generates high-frequency vibration during operation, the anti-slip resistance pad 24 uses its high friction coefficient surface to prevent the generator set host 6 from shifting horizontally relative to the fixed base plate 21.

[0030] The exhaust duct 3 is sealed to the exhaust port of the generator set host 6, and the upper end of the exhaust duct 3 extends to the top of the soundproof enclosure 5. The sealed connection structure can also prevent exhaust leakage from causing pollution or damage to the sound insulation and protection layer 15 and the sound insulation and noise reduction cotton 13 on the inner wall of the enclosure.

[0031] Multiple silencing holes 8 are evenly distributed on the circumferential wall of the main muffler 7, and the silencing holes 8 penetrate the inner and outer walls of the main muffler 7. When the exhaust pulse or airflow noise of the diesel generator set enters the main muffler 7, the evenly distributed silencing holes 8 divide the airflow into multiple fine jets. By changing the sound wave propagation path and increasing the sound wave reflection and interference effect, the sound energy is converted into heat energy dissipation, thereby effectively reducing the aerodynamic noise in the low-frequency range of the exhaust.

[0032] The sound insulation protective layer 15 is adhered to and covers all the inner walls of the soundproof enclosure 5 and the soundproof door 4, while the sound insulation and noise reduction cotton 13 is evenly filled into the internal cavities of the soundproof enclosure 5 and the soundproof door 4. Together with the multiple sound-absorbing through holes 8 evenly distributed on the main silencer 7, it comprehensively blocks the noise generated by the unit's operation.

[0033] When the silent diesel generator set of the present invention is in use, the generator set main unit 6 is embedded in the silent housing 5 and started. Its bottom is stably supported by the fixed base plate 21 of the main unit clamping and fixing mechanism 2 and the anti-slip resistance pad 24. By rotating the adjusting handle 25, the adjusting screw 29 is driven. The adjusting screw 29 is threadedly engaged with the fixing screw hole 12 on the side of the silent housing 5, which pushes the clamping connecting rod 28 and the main unit positioning clamp 26 to move horizontally, so that the anti-scratch rubber pad 27 is tightly attached to the side of the generator set main unit 6 to achieve clamping and fixing.

[0034] Meanwhile, the bottom of the exhaust pipe 3 is sealed to the exhaust port of the generator set main unit 6, and the exhaust gas is guided to the top of the silent housing 5 through the exhaust pipe mounting groove 11 and discharged. The noise generated during operation is first absorbed and blocked by the sound insulation protection layer 15 on the inner wall of the silent housing 5 and the sound insulation and noise reduction cotton 13 filled inside. At the same time, the silent door 4 is embedded in the door embedding groove 14 at the front end of the silent housing 5 through the door sealing frame 16 to form a closed structure. The main silencer 7 at the rear of the housing further eliminates the airflow pulsation noise by using multiple evenly distributed silencer holes 8 on its cylinder wall. During maintenance, the maintenance door 9 can be opened through the opening and closing handle 10. The whole silent diesel generator set achieves low-noise and stable operation through multi-stage noise reduction and fixed structure.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A silent diesel generator set, comprising a silent housing (5) and a silent door (4), characterized in that: The four corners of the lower end of the soundproof enclosure (5) are fixedly connected with supporting feet (1). The upper end of the soundproof enclosure (5) is provided with an exhaust pipe mounting groove (11). An exhaust pipe (3) is inserted into the exhaust pipe mounting groove (11). The bottom of the exhaust pipe (3) is fixedly connected with a generator set host (6). The generator set host (6) is embedded in the soundproof enclosure (5). The lower wall of the soundproof enclosure (5) is fixedly connected with a host clamping and fixing mechanism (2). The lower left and lower right ends of the soundproof enclosure (5) are provided with through-type fixing screw holes (12). The middle of the rear wall of the soundproof enclosure (5) is fixedly connected with a main silencer (7). The wall of the main silencer (7) is provided with multiple silencer through holes (8). The front edge of the soundproof enclosure (5) is provided with a door embedding groove (14).

2. The silent diesel generator set according to claim 1, characterized in that: The front middle of the silent door (4) is fitted with a maintenance door (9) via a hinge. The lower front part of the maintenance door (9) is fixedly fitted with an opening and closing handle (10). The rear edge of the silent door (4) is fixedly connected with a door sealing frame (16). The silent door (4) is embedded in the front opening of the silent box (5) through the door sealing frame (16).

3. A silent diesel generator set according to claim 1, characterized in that: The inner walls of the soundproof enclosure (5) and the soundproof door (4) are fixedly connected with a soundproof protective layer (15), and the interior of the soundproof enclosure (5) and the soundproof door (4) is filled with soundproof and noise-reducing cotton (13).

4. A silent diesel generator set according to claim 1, characterized in that: The host clamping and fixing mechanism (2) includes a fixed base plate (21) and an adjusting screw (29). The front and rear parts of the lower plate wall of the fixed base plate (21) are provided with base plate mounting grooves (22). The front and rear parts of the upper end of the fixed base plate (21) are provided with through sliding grooves (23). The upper end of the fixed base plate (21) is fixedly connected with multiple anti-slip resistance pads (24).

5. A silent diesel generator set according to claim 4, characterized in that: Two adjusting screws (29) are symmetrically arranged. One end of each adjusting screw (29) is fixedly connected to an adjusting handle (25). The other end of the adjusting screw (29) is movably connected to a clamping rod (28) through a bearing. The front end and rear end of the clamping rod (28) are fixedly connected to a main unit positioning clamp (26). The inner wall of the main unit positioning clamp (26) is fixedly connected to an anti-scratch rubber pad (27). The fixed base plate (21) is fixedly connected to the middle of the lower wall of the silent enclosure (5).

6. A silent diesel generator set according to claim 5, characterized in that: The adjusting screw (29) passes through the fixed screw hole (12) on the side of the silent housing (5), and the adjusting screw (29) is threadedly engaged with the fixed screw hole (12) to realize the left and right adjustment of the main unit positioning clamp (26).

7. A silent diesel generator set according to claim 4, characterized in that: The anti-slip resistance pad (24) is in close contact with the bottom of the generator set main unit (6).

8. A silent diesel generator set according to claim 1, characterized in that: The exhaust duct (3) is sealed to the exhaust port of the generator set main unit (6), and the upper end of the exhaust duct (3) extends to the top of the soundproof enclosure (5).

9. A silent diesel generator set according to claim 1, characterized in that: Multiple silencing holes (8) are evenly distributed on the circumferential wall of the main silencing cylinder (7), and the silencing holes (8) penetrate the inner and outer walls of the main silencing cylinder (7).

10. A silent diesel generator set according to claim 3, characterized in that: The sound insulation protective layer (15) is attached to and covers all the inner walls of the soundproof box (5) and the soundproof door (4), and the sound insulation and noise reduction cotton (13) is evenly filled in the internal cavity of the soundproof box (5) and the soundproof door (4).

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