Silent diesel generator set

Abstract

This invention provides a silent diesel generator set, belonging to the technical field of diesel generators. The device includes a base, a generator body, a cooling fan, and a soundproof cover, and further includes a noise reduction mechanism disposed on one side of the cooling fan. The noise reduction mechanism includes a connecting pipe fixedly connected to one side of the cooling fan. Two elastic elements are fixedly installed inside the connecting pipe, and a guide ring and a guide ring are respectively fixedly installed at one end of each elastic element. This invention provides a silent diesel generator set that effectively reduces high-frequency noise by utilizing the guide rings and the soundproof grid. It also reduces airflow resistance and prevents a surge in turbulent noise by using gas to push the guide rings in opposite directions. Furthermore, the staggered design of the louvers significantly improves the noise reduction effect, ensuring quiet and stable operation of the generator set.

Description

Technical Field

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

[0002] A diesel generator set is a rigid unit consisting of a diesel engine as the power source, a generator, a control panel, a common base, and other components. Low-noise diesel generator sets are a type of diesel generator set that are widely used in power supply locations with strict noise requirements, such as post and telecommunications, hotels, entertainment venues, hospitals, schools, high-rise buildings, and industrial and mining enterprises. A search of patent document CN220869517U discloses an ultra-quiet diesel generator set, including a base plate, a soundproof cover, an air inlet box, an air outlet box, a diesel generator set body, and damping shock absorbers. The diesel generator set body is mounted on the top of the base plate via a mounting bracket. Damping shock absorbers are fixed to the diesel generator set body and the base plate at equal intervals by bolts. The soundproof cover is fixed to the top of the diesel generator set body on the outside of the base plate via bolts. The air inlet box is fixed to the top of the soundproof cover via bolts. A soundproof board is embedded inside the air inlet box, and a reserved groove is opened inside the soundproof board. This new type of generator set can reduce the vibration generated by the diesel engine during operation by setting up damping shock absorbers, prevent the diesel engine from colliding with the base plate and the soundproof cover, avoid noise generation, and block noise to a certain extent during air intake and exhaust. The noise gradually weakens as it propagates in the reserved groove and exhaust groove, resulting in high noise reduction efficiency and making it suitable for widespread use. While the aforementioned patent documents reduce noise from hot airflow through soundproof covers and air outlet boxes, in the prior art, when the generator operates at high power, the exhaust gas flow rate is too fast. When this high-speed hot air enters the air outlet box, due to the multiple arc-shaped obstructions inside the air outlet box, the characteristics of the high-speed airflow are not fully considered. The airflow forms turbulence inside the air outlet box, and the airflow collides and rubs violently with the arc-shaped obstructions and soundproof panels inside the air outlet box, thus unexpectedly generating a large amount of noise. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a silent diesel generator set that effectively solves the problem in existing technologies where, when the generator operates at high power, the exhaust gas flow rate is too fast. When this high-speed hot gas enters the air intake box, the airflow forms turbulence inside the air intake box because the internal structure design of the air intake box does not fully consider the characteristics of high-speed airflow. The airflow violently collides and rubs against the inner wall of the air intake box and other components such as the sound insulation board, thus unexpectedly generating a large amount of noise.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a silent diesel generator set, comprising a base, a generator body, a cooling fan, and a soundproof cover, and further comprising: The noise reduction mechanism is located on one side of the cooling fan; The noise reduction mechanism includes a connecting pipe fixedly connected to one side of the cooling fan. Two elastic elements are fixedly installed inside the connecting pipe. One end of each elastic element is fixedly installed with a flow guide ring and a flow guide ring. There are four flow guide rings and four flow guide rings. Each pair of flow guide rings is elastically connected by an elastic element. A connecting ring is fixedly installed inside each flow guide ring and the surface of the connecting ring is provided with a fine groove. A sound insulation grid is fixedly installed on the side of the connecting pipe away from the surface of the cooling fan.

[0005] As a further improvement of the present invention, it also includes: A multi-angle exhaust noise reduction component 1 is disposed on one side of a soundproof cover. The multi-angle exhaust noise reduction component 1 includes an exhaust shell fixedly connected to one side of the soundproof cover. A louver 1 is rotatably connected inside the exhaust shell. A gear 1 is fixedly installed on one side of the louver 1. A rack 1 is disposed on one side of the gear 1. A connecting rod 2 is fixedly installed at the top of the rack 1. A connecting rod 1 is fixedly installed at the top of the surface of the guide ring 1, and the connecting rod 1 and the connecting rod 2 are fixedly connected. Multi-angle exhaust noise reduction component two is located inside the exhaust housing.

[0006] As a further improvement of the present invention, the multi-angle exhaust noise reduction component 2 includes a louver 2 rotatably connected inside the exhaust shell, a gear 2 fixedly installed at the top of the louver 2, an elastic element 3 fixedly installed on one side inside the exhaust shell, a rack 2 meshing with the gear 2 fixedly installed on one side of the elastic element 3, a fixing block fixedly installed at one end of the rack 2, and a pressing block located at the bottom end of the fixing block fixedly installed on one side of the rack 2.

[0007] As a further improvement of the present invention, it also includes: A sealing assembly is disposed on the opposite side of the first guide ring and the second guide ring. The sealing assembly includes a sealing groove formed at the top of the second guide ring, and a sealing plate located inside the sealing groove is fixedly installed at the bottom of the first guide ring.

[0008] As a further improvement of the present invention, a sealing ring is fixedly installed on the top end of the surface of the connecting pipe, and the connecting rod can slide inside the sealing ring.

[0009] As a further improvement of the present invention, the elastic element two is arranged in groups of three between the flow guide ring one and the flow guide ring two, and both the elastic element two and the elastic element one are provided with a telescopic rod inside.

[0010] As a further improvement of the present invention, a gap is provided between the first louver and the second louver, and both the first louver and the second louver are located on one side of the sound insulation grid.

[0011] As a further improvement of the present invention, the fixed block and the pressing block are both designed with inclined surfaces on opposite sides, and the two inclined surfaces are designed to be parallel, and there is a gap between the fixed block and the pressing block and the louver.

[0012] As a further improvement of the present invention, a baffle is fixedly installed inside the connecting pipe on one side of the first and second guide rings, and the surface of the baffle is fully in contact with one side of the first and second guide rings.

[0013] The present invention also provides a method for using a silent diesel generator set, the method comprising the following steps; S1, the operator drives the generator body to idle speed first, so that the oil can fully lubricate the components. At the same time, check whether the instrument readings are normal. After confirming that there are no abnormalities, adjust the speed to the rated value so that the generator enters a stable power generation state. During the power generation process, the cooling fan will start. The internal cooling fan can dissipate heat from the generator body, and the exhaust hot air will enter the connecting pipe. S2, when the hot airflow enters the connecting pipe, the surface of the connecting ring has fine grooves, and the edges of the grooves will generate shear force on the airflow, increasing the friction and energy dissipation inside the airflow, thereby reducing high-frequency noise. In addition, the first and second guide rings are arranged in a spiral shape. When the airflow reaches the first layer of the multi-layer guide rings, each layer of the spiral guide rings uses its unique shape to cleverly decompose the originally strong and concentrated high-speed airflow into multiple low-speed sub-airflows. Each sub-airflow flows along the spiral trajectory of the first and second guide rings in a relatively stable and orderly manner. This decomposition effect greatly changes the flow state of the airflow, effectively reducing the intensity of turbulence and reducing noise generation from the source. Then the flowing hot airflow will pass through the first guide ring and be discharged from the inside of the sound insulation grid. The inside of the sound insulation grid is a honeycomb design, which can further disperse the airflow and absorb the remaining noise energy, avoiding the generation of sharp wind noise. S3, when the generator body and cooling fan are running under high load, the high-speed airflow will come into contact with the surface of the connecting ring. The connecting ring is conical and is arranged around the surface of the first and second guide rings. The airflow will hit the conical surface of the connecting ring. The strong impact force of the airflow generates thrust, which acts on the connecting ring, thereby pushing the first and second guide rings associated with it to move in opposite directions. During its movement, the elastic element 1 will be compressed. By using the movement of the first and second guide rings, the airflow channel will gradually expand, reducing airflow resistance. S4, when the guide ring moves, it will drive the connecting rod 1, connecting rod 2 and rack 1 to move upward. Rack 1 will drive gear 1 and louver 1 to rotate, and rack 1 will drive the extrusion block to move. The extrusion block will squeeze and push the fixed block and rack 2 to move. Rack 2 will drive gear 2 and louver 2 to rotate. Because louver 2 and louver 1 are arranged in an alternating design and at different angles, when the sound insulation grid discharges gas, the gas will pass through louver 2 and louver 1 at different angles.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a silent diesel generator set, which effectively reduces high-frequency noise by means of a first guide ring, a second guide ring and a sound insulation grid. It also reduces airflow resistance by pushing the first guide ring and the second guide ring in opposite directions through gas, preventing a surge in turbulent noise. In addition, the staggered design of the second louver and the first louver greatly improves the noise reduction effect and ensures that the generator set operates quietly and stably.

[0015] (2) This invention achieves multiple noise reduction effects by using the first guide ring, the second guide ring, and the sound insulation grid. The first guide ring and the second guide ring are arranged in a spiral shape and the air outlet gradually increases in size. The high-speed intake airflow is accurately decomposed into multiple low-speed sub-airflows, which effectively weakens the turbulence intensity and curbs the generation of noise from the source. The honeycomb design inside the sound insulation grid further disperses the airflow, making it flow more smoothly. At the same time, it strongly absorbs the remaining noise energy and eliminates sharp wind noise. Specifically, after the hot airflow enters the first guide ring and the second guide ring, the airflow is decomposed. Combined with the effect of the sound insulation grid, the overall noise reduction effect is greatly improved.

[0016] (3) The present invention utilizes the cooperation of elastic element one, elastic element two and connecting ring to drive the connecting ring, guide ring one and guide ring two to move in opposite directions by the high-speed airflow. During this process, elastic element one is compressed due to compression, and at the same time, the airflow channel is gradually expanded by the movement of guide ring one and guide ring two, which effectively reduces airflow resistance and avoids the surge of turbulent noise under high flow velocity. Specifically, when the generator body and cooling fan are running under high load, hot airflow with excessive flow velocity will be generated. Because the connecting ring adopts a conical design, the high-speed airflow will fully contact the surface of the connecting ring, thereby driving guide ring one and guide ring two to move in opposite directions, thereby reducing resistance and noise generation.

[0017] (4) The present invention utilizes the combination of multi-angle exhaust noise reduction component one and multi-angle exhaust noise reduction component two. It utilizes the movement of guide ring one to drive louver one to rotate, and the movement of rack one to cause louver two to rotate accordingly. Because louver two and louver one are designed in an alternating manner, when the gas discharged from the sound insulation grid passes through louver two and louver one at different angles, the sound waves will be reflected multiple times between the layers. During the reflection process, the sound wave energy is gradually dissipated, effectively reducing the noise intensity. Specifically, when guide ring one moves, it will drive connecting rod one, connecting rod two and rack one to move upward. Rack one will then drive gear one and louver one to rotate and open, while pushing the extrusion block to move, causing the fixing block and rack two to move, and finally driving gear two and louver two to rotate and open. This comprehensively improves the noise reduction effect and makes the generator set run more quietly and stably. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the soundproof cover of the present invention; Figure 3 This is a cross-sectional schematic diagram of the connecting pipe of the present invention; Figure 4 This is a schematic diagram illustrating the flow guide ring of the present invention; Figure 5 This is a cross-sectional schematic diagram of the flow guide ring of the present invention; Figure 6 This is a cross-sectional schematic diagram of the exhaust casing of the present invention; Figure 7 This is the invention Figure 6 Enlarged diagram of point A in the diagram; Figure 8 This is a schematic diagram illustrating the multi-angle exhaust noise reduction component of the present invention; Figure 9 This is the invention Figure 8 Enlarged diagram of point B in the image.

[0019] In the diagram: 100, base; 200, generator body; 300, cooling fan; 400, noise reduction mechanism; 401, connecting pipe; 402, elastic element one; 403, guide ring one; 404, guide ring two; 405, elastic element two; 406, connecting ring; 407, sound insulation grille; 500, multi-angle exhaust noise reduction assembly one; 501, exhaust shell; 502, louver one; 503, gear one; 504. Rack 1; 505. Connecting rod 1; 506. Connecting rod 2; 600. Multi-angle exhaust noise reduction assembly 2; 601. Louver 2; 602. Gear 2; 603. Elastic element 3; 604. Rack 2; 605. Fixing block; 606. Extrusion block; 700. Sealing assembly; 701. Sealing groove; 702. Sealing plate; 800. Sealing ring; 900. Soundproof cover; 1000. Baffle. Detailed Implementation

[0020] 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.

[0021] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" indicate orientation or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0022] It should be understood that, in the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms “installation,” “connection,” and “linking” should be interpreted broadly.

[0023] Example 1: See Appendix Figures 1 to 9 The silent diesel generator set provided in this embodiment 1 includes a base 100, a generator body 200, a cooling fan 300, and a soundproof cover 900, and also includes: The noise reduction mechanism 400 is located on one side of the cooling fan 300; The noise reduction mechanism 400 includes a connecting pipe 401 fixedly connected to one side of the cooling fan 300. Two elastic elements 402 are fixedly installed inside the connecting pipe 401. One end of each elastic element 402 is fixedly installed with a flow guide ring 403 and a flow guide ring 404. There are four flow guide rings 403 and four flow guide rings 404. Each pair of flow guide rings 403 and 404 are elastically connected by an elastic element 405. A connecting ring 406 is fixedly installed inside each flow guide ring 403 and 404. The surface of the connecting ring 406 is provided with a groove. A sound insulation grid 407 is fixedly installed on the side of the connecting pipe 401 away from the surface of the cooling fan 300.

[0024] It should be noted that the operator can drive the generator body 200 to idle first, so that the oil can fully lubricate the components. At the same time, check whether the instrument readings are normal. After confirming that there are no abnormalities, adjust the speed to the rated value so that the generator enters a stable power generation state. During the power generation process, the cooling fan 300 will start. Its internal cooling fan can dissipate heat from the generator body 200, and the exhaust hot air will enter the connecting pipe 401. After the hot airflow enters the connecting pipe 401, the surface of the connecting ring 406 has fine grooves. The edges of these grooves exert a shearing force on the airflow, causing tiny vortices and disturbances. This increases internal friction and energy dissipation, thus reducing high-frequency noise. Furthermore, the spiral arrangement of the guide ring 403 decomposes the high-speed intake airflow into multiple low-speed sub-flows, effectively reducing turbulence intensity and lowering noise at its source. The flowing hot airflow then passes through the guide ring 403 and exits through the sound insulation grid 407. The honeycomb design of the sound insulation grid 407 further disperses the airflow. The airflow absorbs residual noise energy and avoids the generation of sharp wind noise. When the generator body 200 and cooling fan 300 are running under high load, the connecting ring 406 is tapered and designed around the surface of the first guide ring 403 and the second guide ring 404. As a result, the airflow with excessive speed will come into contact with the surface of the connecting ring 406 and can push the first guide ring 403 and the second guide ring 404 to move in opposite directions. During its movement, the elastic element 402 will be compressed. With the movement of the first guide ring 403 and the second guide ring 404, the airflow channel will gradually expand, reducing airflow resistance and avoiding a surge in turbulent noise under high flow speed.

[0025] like Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, it also includes: A multi-angle exhaust noise reduction component 500 is disposed on one side of a soundproof enclosure 900. The multi-angle exhaust noise reduction component 500 includes an exhaust shell 501 fixedly connected to one side of the soundproof enclosure 900. A louver 502 is rotatably connected inside the exhaust shell 501. A gear 503 is fixedly installed on one side of the louver 502. A rack 504 is disposed on one side of the gear 503. A connecting rod 506 is fixedly installed at the top of the rack 504. A connecting rod 505 is fixedly installed at the top of the surface of a guide ring 403, and the connecting rod 505 is fixedly connected to the connecting rod 506. The multi-angle exhaust noise reduction component 2600 is located inside the exhaust housing 501.

[0026] like Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the multi-angle exhaust noise reduction component 2 600 includes a louver 2 601 rotatably connected inside the exhaust housing 501. A gear 2 602 is fixedly installed at the top of the louver 2 601. An elastic element 3 603 is fixedly installed on one side inside the exhaust housing 501. A rack 2 604 that meshes with the gear 2 602 is fixedly installed on one side of the elastic element 3 603. A fixing block 605 is fixedly installed at one end of the rack 2 604. A pressing block 606 located at the bottom end of the fixing block 605 is fixedly installed on one side of the rack 2 604.

[0027] It should be noted that, through the design of the multi-angle exhaust noise reduction component 1 500 and the multi-angle exhaust noise reduction component 2 600, when the guide ring 1 403 moves, it will drive the connecting rod 1 505 and the connecting rod 2 506 to move. The connecting rod 2 506 will pull the rack 1 504 upward. Because the rack 1 504 meshes with the gear 1 503, the moving rack 1 504 will drive the gear 1 503 and the louver 1 502 to rotate. Furthermore, the rack 1 504 will drive the pressing block 606 to move. The pressing block 606 will press and push the fixed block 605 and the rack 2 604 to move. When the rack 2 604 moves, it will squeeze the elastic element 3 603, and the rack 2 604 will mesh with the gear 2 602. In turn, the rack 2 604 will drive the gear 2 602 and the louver 2 601 to rotate. Due to the staggered arrangement of the louver 2 601 and the louver 1 502 at different angles, when the sound insulation grid 407 discharges gas, the gas will pass through the louver 2 601 and the louver 1 502 at different angles. The sound waves will be reflected multiple times between the layers. During the reflection process, the energy is gradually dissipated, which greatly improves the noise reduction effect and makes the generator set run more quietly and stably.

[0028] like Figure 5 As shown, it also includes: A sealing assembly 700 is disposed on the opposite side of the first guide ring 403 and the second guide ring 404. The sealing assembly 700 includes a sealing groove 701 formed at the top of the second guide ring 404, and a sealing plate 702 located inside the sealing groove 701 is fixedly installed at the bottom of the first guide ring 403.

[0029] It should be noted that, through the design of the sealing assembly 700, when the first guide ring 403 and the second guide ring 404 move in opposite directions, the sealing plate 702 will slide inside the sealing groove 701, thereby ensuring the sealing between the first guide ring 403 and the second guide ring 404, preventing airflow from flowing out from the gap between the first guide ring 403 and the second guide ring 404 during movement. Furthermore, the sealing plate 702 and the sealing groove 701 can limit the position of the first guide ring 403 and the second guide ring 404, preventing their position from shifting when the elastic element 402 and the elastic element 405 push the first guide ring 403 and the second guide ring 404 to reset.

[0030] like Figure 4 and Figure 6 As shown, a sealing ring 800 is fixedly installed on the top of the surface of the connecting pipe 401, located on the surface of the connecting rod 505, and the connecting rod 505 can slide inside the sealing ring 800.

[0031] It is easy to understand that, through the design of the sealing ring 800, when the connecting rod 505 moves, it will slide inside the sealing ring 800, and the inner wall of the sealing ring 800 will fully fit the surface of the connecting rod 505, thereby increasing the sealing performance of the connecting pipe 401 and preventing gas from flowing out from the gap between the connecting pipe 401 and the connecting rod 505.

[0032] like Figure 4 and Figure 8 As shown, three elastic elements 405 are arranged in a group between the first guide ring 403 and the second guide ring 404. The elastic elements 405 and the first elastic element 402 are both equipped with telescopic rods. There is a gap between the first louver 502 and the second louver 601. The first louver 502 and the second louver 601 are both located on one side of the sound insulation grid 407.

[0033] It is easy to understand that through the design of elastic element 2 405 and elastic element 1 402, since elastic element 2 405 is arranged in groups of three between guide ring 1 403 and guide ring 2 404, it can be ensured that each guide ring 1 403 and guide ring 2 404 can be adjusted according to the airflow speed. Furthermore, both elastic element 2 405 and elastic element 1 402 have internal telescopic rods, which can limit their movement and prevent the position of elastic element 1 402 and elastic element 2 405 from shifting when compressed, thus guiding the airflow... The multiple layers of ring 403 and guide ring 404 effectively guide the airflow through the design of louver 502 and louver 601. Since there is a gap between louver 502 and louver 601, louver 601 will not interfere with the rotation of louver 502. Furthermore, louver 502 and louver 601 are both located on one side of the sound insulation grid 407. Thus, when the sound insulation grid 407 discharges hot air, louver 502 and louver 601 can guide the airflow to ensure noise reduction.

[0034] like Figure 3 , Figure 4 and Figure 9 As shown, the fixed block 605 and the extrusion block 606 are both designed with bevels on opposite sides, and the two bevels are parallel. There is a gap between the fixed block 605 and the extrusion block 606 and the louver 502. The connecting pipe 401 is fixedly installed with a baffle 1000 located on one side of the flow guide ring 403 and the flow guide ring 404, and the surface of the baffle 1000 is fully in contact with one side of the flow guide ring 403 and the flow guide ring 404.

[0035] It is easy to understand that the design of the fixing block 605 and the pressing block 606, with their opposite sides both being beveled, reduces the resistance between them, ensuring that the pressing block 606 can stably push the fixing block 605. Furthermore, gaps are provided between the fixing block 605 and the pressing block 606 and the louver 502, ensuring the stability of the louver 502's rotation. The design of the baffle 1000 further enhances this stability. The surface of the baffle 1000 is fully in contact with one side of the first guide ring 403 and the second guide ring 404. Thus, when the hot air enters the interior of the first guide ring 403 and the second guide ring 404, the baffle 1000 can block the gap between the connecting pipe 401 and the first guide ring 403 and the second guide ring 404, preventing gas from passing through the gap between the connecting pipe 401 and the first guide ring 403 and the second guide ring 404 and affecting the noise treatment of the first guide ring 403 and the second guide ring 404.

[0036] The present invention also provides a method for using a silent diesel generator set, the method comprising the following steps: S1, the operator drives the generator body 200 to idle speed first, so that the oil can fully lubricate the components. At the same time, check whether the instrument readings are normal. After confirming that there are no abnormalities, adjust the speed to the rated value so that the generator enters a stable power generation state. During the power generation process, the cooling fan 300 will start. Its internal cooling fan can dissipate heat from the generator body 200, and the exhaust hot air will enter the connecting pipe 401. S2, when the hot airflow enters the connecting pipe 401, the surface of the connecting ring 406 has fine grooves, and the edges of these grooves exert a shearing force on the airflow, increasing internal friction and energy dissipation, thereby reducing high-frequency noise. Furthermore, the first guide ring 403 and the second guide ring 404 are arranged in a spiral shape. When the airflow reaches the multi-layered first guide ring 403, each spiral guide ring 403 and the second guide ring 404, using their unique shapes, cleverly decompose the originally strong, concentrated high-speed airflow into multiple low-frequency streams. The tachyon airflow, each stream of airflow follows the spiral trajectory of guide ring 1 403 and guide ring 2 404, and flows in a relatively stable and orderly manner. This decomposition effect greatly changes the flow state of the airflow, effectively reduces the intensity of turbulence, and reduces noise generation from the source. Then the flowing hot airflow passes through guide ring 1 403 and is discharged from the inside of sound insulation grid 407. The inside of sound insulation grid 407 is a honeycomb design, which can further disperse the airflow and absorb the remaining noise energy, thus avoiding the generation of sharp wind noise. S3, when the generator body 200 and cooling fan 300 are running under high load, the airflow with excessive speed will come into contact with the surface of the connecting ring 406. The connecting ring 406 is conical and is arranged around the surface of the first guide ring 403 and the second guide ring 404. The airflow will hit the conical surface of the connecting ring 406. The strong impact force of the airflow generates thrust, which acts on the connecting ring 406, thereby pushing the associated first guide ring 403 and second guide ring 404 to move in opposite directions. During its movement, the elastic element 402 will be compressed. By utilizing the movement of the first guide ring 403 and the second guide ring 404, the airflow channel will gradually expand, reducing airflow resistance. S4, when the guide ring 403 moves, it will drive the connecting rod 505, the connecting rod 506 and the rack 504 to move upward. The rack 504 will drive the gear 503 and the louver 502 to rotate. The rack 504 will also drive the pressing block 606 to move. The pressing block 606 will press and push the fixing block 605 and the rack 604 to move. The rack 604 will drive the gear 602 and the louver 601 to rotate. Because the louver 601 and the louver 502 are arranged in an alternating manner and at different angles, when the sound insulation grid 407 discharges gas, the gas will pass through the louver 601 and the louver 502 at different angles.

[0037] 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 base (100), a generator body (200), a cooling fan (300), and a soundproof cover (900), characterized in that, Also includes: A noise reduction mechanism (400) is disposed on one side of a cooling fan (300); wherein, the noise reduction mechanism (400) includes a connecting pipe (401) fixedly connected to one side of the cooling fan (300), and two elastic elements (402) are fixedly installed inside the connecting pipe (401). One end of each elastic element (402) is fixedly installed with a flow guide ring (403) and a flow guide ring (404). There are four rings (404) in total, and each pair of guide rings (403) and guide rings (404) are elastically connected by elastic element (405). A connecting ring (406) is fixedly installed inside the guide rings (403) and guide rings (404), and the surface of the connecting ring (406) is provided with a fine groove. A sound insulation grid (407) is fixedly installed on the side of the connecting pipe (401) away from the surface of the cooling fan (300). A sealing assembly (700) is disposed on the opposite side of the first guide ring (403) and the second guide ring (404). The sealing assembly (700) includes a sealing groove (701) opened at the top of the second guide ring (404). A sealing plate (702) located inside the sealing groove (701) is fixedly installed at the bottom end of the first guide ring (403).

2. The silent diesel generator set according to claim 1, characterized in that, Also includes: A multi-angle exhaust noise reduction component (500) is disposed on one side of a soundproof cover (900). The multi-angle exhaust noise reduction component (500) includes an exhaust shell (501) fixedly connected to one side of the soundproof cover (900). A louver (502) is rotatably connected inside the exhaust shell (501). A gear (503) is fixedly installed on one side of the louver (502). A rack (504) is disposed on one side of the gear (503). A connecting rod (506) is fixedly installed at the top of the rack (504). A connecting rod (505) is fixedly installed at the top of the surface of the guide ring (403), and the connecting rod (505) is fixedly connected to the connecting rod (506). Multi-angle exhaust noise reduction component 2 (600) is located inside the exhaust housing (501).

3. The silent diesel generator set according to claim 2, characterized in that, The multi-angle exhaust noise reduction component 2 (600) includes a louver 2 (601) rotatably connected inside the exhaust shell (501). A gear 2 (602) is fixedly installed at the top of the louver 2 (601). An elastic element 3 (603) is fixedly installed on one side inside the exhaust shell (501). A rack 2 (604) that meshes with the gear 2 (602) is fixedly installed on one side of the elastic element 3 (603). A fixing block (605) is fixedly installed at one end of the rack 2 (604). A pressing block (606) located at the bottom end of the fixing block (605) is fixedly installed on one side of the rack 1 (504).

4. The silent diesel generator set according to claim 1, characterized in that, A sealing ring (800) is fixedly installed on the top of the surface of the connecting pipe (401) and located on the surface of the connecting rod (505), and the connecting rod (505) can slide inside the sealing ring (800).

5. The silent diesel generator set according to claim 1, characterized in that, The elastic element 2 (405) is arranged in groups of three between the flow guide ring 1 (403) and the flow guide ring 2 (404). Both the elastic element 2 (405) and the elastic element 1 (402) are provided with telescopic rods inside.

6. The silent diesel generator set according to claim 2, characterized in that, A gap is provided between the first louver (502) and the second louver (601), and both the first louver (502) and the second louver (601) are located on one side of the sound insulation grid (407).

7. The silent diesel generator set according to claim 3, characterized in that, The fixing block (605) and the pressing block (606) are both designed with inclined surfaces on opposite sides, and the two inclined surfaces are designed to be parallel. There is a gap between the fixing block (605) and the pressing block (606) and the louver (502).

8. The silent diesel generator set according to claim 1, characterized in that, The connecting pipe (401) is fixedly installed with a baffle (1000) located on one side of the first guide ring (403) and the second guide ring (404), and the surface of the baffle (1000) is fully in contact with one side of the first guide ring (403) and the second guide ring (404).

9. The method of using the silent diesel generator set according to any one of claims 1-8, characterized in that, The usage method includes the following steps; S1, the operator drives the generator body (200) to run at idle speed first, so that the oil can fully lubricate the components. At the same time, check whether the instrument readings are normal. After confirming that there are no abnormalities, adjust the speed to the rated value so that the generator enters a stable power generation state. During the power generation process, the cooling fan (300) will start. The internal cooling fan can dissipate heat from the generator body (200), and the exhaust hot air will enter the connecting pipe (401). S2, when the hot airflow enters the inside of the connecting pipe (401), because the surface of the connecting ring (406) has a fine groove, the edge of the fine groove will generate a shear force on the airflow, increasing the friction and energy dissipation inside the airflow, thereby reducing high-frequency noise. In addition, the first guide ring (403) and the second guide ring (404) are arranged in a spiral shape. When the airflow reaches the first multi-layer guide ring (403), each layer of spiral guide ring (403) and guide ring (404) is decomposed into multiple low-speed sub-airflows. Each sub-airflow flows along the spiral trajectory of the first guide ring (403) and the second guide ring (404) in a relatively stable and orderly manner. Then the flowing hot airflow will pass through the first guide ring (403) and be discharged from the inside of the sound insulation grid (407). The inside of the sound insulation grid (407) is a honeycomb design, which can further disperse the airflow and absorb the remaining noise energy, thus avoiding the generation of sharp wind noise. S3, when the generator body (200) and cooling fan (300) are running under high load, the airflow with excessive speed will come into contact with the surface of the connecting ring (406). The connecting ring (406) is conical and is arranged around the surface of the first guide ring (403) and the second guide ring (404). The airflow will hit the conical surface of the connecting ring (406). The strong impact force of the airflow generates thrust, which acts on the connecting ring (406) and pushes the associated first guide ring (403) and second guide ring (404) to move in opposite directions. When they move, the first elastic element (402) will be compressed. By using the movement of the first guide ring (403) and the second guide ring (404), the airflow channel will gradually expand, reducing the airflow resistance. S4, when the guide ring 1 (403) moves, it will drive the connecting rod 1 (505), the connecting rod 2 (506) and the rack 1 (504) to move upward. The rack 1 (504) will drive the gear 1 (503) and the louver 1 (502) to rotate. The rack 1 (504) will drive the extrusion block (606) to move. The extrusion block (606) will squeeze and push the fixed block (605) and the rack 2 (604) to move. The rack 2 (604) will drive the gear 2 (602) and the louver 2 (601) to rotate. Since the louver 2 (601) and the louver 1 (502) are arranged in an alternating manner and at different angles, when the sound insulation grid (407) discharges gas, the gas will pass through the louver 2 (601) and the louver 1 (502) at different angles.

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