Vibration control and noise suppression device for aircraft engine

Abstract

The invention provides a vibration control and noise suppression device for an aircraft engine, and relates to the technical field of noise suppression equipment. Comprising a noise suppression box, a top silencing plate is fixedly connected to the top of the noise suppression box, the noise suppression box, an engine silencing bin and a sound insulation cover are arranged, a bottom silencing plate and the top silencing plate are used for conducting sealing treatment on the top and the bottom of the noise suppression box, and a polyurethane foam plate and a wood sound absorption plate are used for conducting primary silencing treatment; the silencer and the gas leading-in bin are used for secondary silencing treatment, the sound insulation layer and the sponge plate are used for third-time noise silencing treatment, the silencing cotton and the buffer piece are used for buffering and partial silencing treatment when gas generated in the engine silencing bin is recycled, and through layer-by-layer silencing in multiple links, the final noise suppression efficiency is improved; and the engine and the interior of the engine silencing bin are installed through cooperation of the bottom fixing plate and the first positioning bolts, and the operation stability of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of noise suppression equipment technology, and in particular to an aircraft engine vibration control and noise suppression device. Background Technology

[0002] With the continuous advancement of aircraft technology, especially the rapid development of civil and military aircraft, aircraft performance and comfort have become increasingly important research topics. As one of the core components of an aircraft, the engine directly affects its power performance, fuel efficiency, noise emissions, and flight safety. Engine vibration and noise issues, especially during flight, have a significant impact on the comfort of crew and passengers, the structural safety of the aircraft, and environmental protection.

[0003] In practice, existing technologies do not employ multi-level noise suppression, resulting in poor noise control and causing issues with comfort and safety. Furthermore, they consume a significant amount of electrical equipment for operation, increasing overall installation and usage costs and causing numerous inconveniences.

[0004] Therefore, the present invention provides an aircraft engine vibration control and noise suppression device. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an aircraft engine vibration control and noise suppression device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an aircraft engine vibration control and noise suppression device, comprising a noise suppression box. The top of the noise suppression box is fixedly connected to a top silencing plate, and the bottom of the noise suppression box is fixedly connected to a bottom silencing plate. The bottom silencing plate and the top silencing plate are used to seal the top and bottom of the noise suppression box. The noise suppression box contains an engine silencing chamber. An acoustic sensor is installed on the top of the engine silencing chamber. An engine is installed inside the engine silencing chamber. The output end of the engine extends to the outside of the engine silencing chamber and is fixedly connected to an output shaft. A wooden sound-absorbing panel is installed on the inner wall of the engine silencing chamber. A polyurethane foam board is installed on the outside of the wooden sound-absorbing panel and inside the engine silencing chamber. The polyurethane foam board and the wooden sound-absorbing panel are used for primary noise reduction treatment. An auxiliary noise reduction mechanism is installed at the bottom of the top muffler. The auxiliary noise reduction mechanism includes a gas treatment chamber. The gas treatment chamber is fixedly connected to the bottom of the top muffler. A gas inlet chamber is installed inside the gas treatment chamber. The gas treatment chamber has a processing cavity that is installed to cooperate with the gas inlet chamber. A muffler extending into the gas inlet chamber is installed at the bottom of the gas treatment chamber. An inlet pipe is fixedly connected to the bottom of the muffler. The inlet pipe is located at the top of the engine muffler. The muffler has equidistantly distributed sound insulation cavities inside. Perforated pipes that are equidistantly distributed and extend into the engine muffler are installed inside the inlet pipe. An exhaust pipe extending to the outside of the noise suppression box is installed on one side of the gas treatment chamber. The muffler and the gas inlet chamber are used for secondary noise reduction treatment.

[0007] In a preferred embodiment, a bottom fixing plate is fixedly connected inside the engine muffler compartment and at the bottom of the engine. The bottom fixing plate is threaded with symmetrically distributed first positioning bolts. The engine and the engine muffler compartment are installed by the cooperation of the bottom fixing plate and the first positioning bolts, which improves the operational stability of the equipment. The inner wall of the noise suppression box is equipped with a sound insulation layer, and the outer side of the sound insulation layer is equipped with equidistantly distributed sponge boards. A sound insulation cover is installed inside the noise suppression box and on the outer side of the engine muffler compartment. The sound insulation layer and sponge boards are used for three-stage noise reduction treatment.

[0008] In a preferred embodiment, air outlet slits are provided on both sides of the gas inlet chamber. Equally spaced buffer plates are installed on the outer side of the inlet pipe. A side inspection cover is installed on the outer side of the noise suppression box, and a handle is fixedly connected to the outer side of the side inspection cover. The side inspection cover and handle work together to facilitate opening and maintenance of the noise suppression box. An external dust cover for use with the output shaft is installed on one side of the noise suppression box. An installation groove for the exhaust pipe is provided on the side opposite the external dust cover. Sound-absorbing cotton is installed on the inner wall of the inlet pipe, outside the perforated pipe. The sound-absorbing cotton and buffer plates buffer and partially silence the gas generated inside the engine's silencer chamber, ensuring normal delivery to the gas treatment chamber for processing. A valve is fixedly connected to one end of the exhaust pipe extending to the outside. The valve controls the opening and closing of the exhaust pipe, thereby silencing and discharging the gas generated by the engine. Through multiple layers of silencing, the final noise suppression efficiency is improved.

[0009] In a preferred embodiment, the bottom of the sound-absorbing plate is fixedly connected to two symmetrically distributed bottom support frames. Both bottom support frames are U-shaped structures, and the interior of each bottom support frame is threaded with equally spaced second positioning bolts. The bottom support frames and the second positioning bolts are used to connect the overall equipment to the work site, which facilitates the adjustment of the installation position of the overall equipment. The U-shaped bottom support frame structure facilitates both support and positioning, thereby improving the stability of the equipment during operation.

[0010] In a preferred embodiment, a wireless transceiver is fixedly connected to the top of the top silencing plate. A main control board is fixedly connected inside the wireless transceiver, and a control chip is fixedly connected to the outside of the main control board. The wireless transceiver, acoustic sensor, and engine are all electrically connected to the control chip. The control chip is used to control the operation of the wireless transceiver, acoustic sensor, and engine, thereby realizing unified management of power equipment.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are as follows: By setting up a noise suppression box, an engine muffler compartment, and a soundproof cover, during use, the bottom and top muffler plates are used to seal the top and bottom of the noise suppression box. Polyurethane foam boards and wooden sound-absorbing boards are used for primary noise reduction. The muffler and gas inlet chamber are used for secondary noise reduction. The sound insulation layer and sponge board are used for tertiary noise reduction. Sound-absorbing cotton and buffer sheets are used to buffer and partially reduce noise when gas is generated inside the engine muffler compartment, thus ensuring normal delivery to the gas treatment chamber for processing. A valve is fixedly connected to one end of the exhaust pipe extending to the outside; the valve controls the opening and closing of the exhaust pipe, thereby... The gas generated by the internal engine is treated with noise reduction, and the noise reduction is achieved through multiple layers, improving the final noise suppression efficiency. The overall equipment is connected to the work site by the bottom support frame and the second positioning bolt, which facilitates the adjustment of the overall equipment installation position. The U-shaped bottom support frame facilitates support and positioning, thereby improving the stability of the equipment during operation. The side inspection cover and handle make it easy to open and inspect the inside of the noise suppression box. The engine and the engine noise reduction chamber are installed by the bottom fixing plate and the first positioning bolt, which improves the operational stability of the equipment. Attached Figure Description

[0012] Figure 1 A schematic diagram of the overall structure of an aircraft engine vibration control and noise suppression device provided by the present invention; Figure 2 An internal view of the overall structure of an aircraft engine vibration control and noise suppression device provided by the present invention; Figure 3This invention provides an enlarged structural schematic diagram of an auxiliary noise reduction mechanism for an aircraft engine vibration control and noise suppression device. Figure 4 The present invention provides an accessory for an aircraft engine vibration control and noise suppression device. Figure 2 Enlarged schematic diagram of the structure at point A in the diagram; Legend: 1. Noise suppression box; 11. Bottom silencing plate; 12. Top silencing plate; 13. Wireless transceiver; 14. External dust cover; 15. Side inspection cover; 16. Handle; 17. Gas treatment chamber; 18. Treatment cavity; 19. Gas introduction chamber; 2. Engine muffler; 21. Bottom mounting plate; 22. First positioning bolt; 23. Acoustic sensor; 24. Polyurethane foam board; 25. Wooden sound-absorbing board; 26. Engine; 27. Output shaft; 3. Soundproof enclosure; 31. Soundproof layer; 32. Sponge board; 4. Muffler; 41. Soundproof cavity; 42. Inlet pipe; 43. Buffer sheet; 44. Sound-absorbing cotton; 45. Perforated pipe; 46. Exhaust pipe; 5. Bottom support frame; 51. Second positioning bolt. Detailed Implementation

[0013] 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.

[0014] like Figures 1-4 As shown, this embodiment provides a technical solution: an aircraft engine vibration control and noise suppression device, including a noise suppression box 1, a top silencing plate 12 fixedly connected to the top of the noise suppression box 1, and a bottom silencing plate 11 fixedly connected to the bottom of the noise suppression box 1. The bottom silencing plate 11 and the top silencing plate 12 are used to seal the top and bottom of the noise suppression box 1. In this scheme, an engine silencing chamber 2 is installed inside the noise suppression box 1. An engine 26 is installed inside the engine silencing chamber 2. The output end of the engine 26 extends to the outside of the engine silencing chamber 2 and is fixedly connected to an output shaft 27. A wooden sound-absorbing panel 25 is installed on the inner wall of the engine silencing chamber 2. A polyurethane foam board 24 is installed on the outside of the wooden sound-absorbing panel 25 and inside the engine silencing chamber 2. The polyurethane foam board 24 and the wooden sound-absorbing panel 25 are used for primary noise reduction treatment. In this design, an auxiliary noise reduction mechanism is installed at the bottom of the top muffler 12. The auxiliary noise reduction mechanism includes a gas treatment chamber 17. The bottom of the top muffler 12 is fixedly connected to the gas treatment chamber 17. A gas inlet chamber 19 is installed inside the gas treatment chamber 17. The gas treatment chamber 17 has a processing cavity 18 that is installed in conjunction with the gas inlet chamber 19. A muffler 4 extending into the gas inlet chamber 19 is installed at the bottom of the gas treatment chamber 17. An inlet pipe 42 is fixedly connected to the bottom of the muffler 4. The inlet pipe 42 is located at the top of the engine muffler chamber 2. The muffler 4 has equidistantly distributed sound insulation cavities 41 inside. The inlet pipe 42 has equidistantly distributed perforated pipes 45 extending into the engine muffler chamber 2 inside. An exhaust pipe 46 extending to the outside of the noise suppression box 1 is installed on one side of the gas treatment chamber 17. The muffler 4 and the gas inlet chamber 19 are used for secondary noise reduction treatment.

[0015] Going a step further, such as Figures 1-4 As shown: In this solution, a bottom fixing plate 21 is fixedly connected inside the engine muffler 2 and at the bottom of the engine 26. The bottom fixing plate 21 is threaded with symmetrically distributed first positioning bolts 22. The engine 26 and the engine muffler 2 are installed in cooperation through the bottom fixing plate 21 and the first positioning bolts 22, which improves the operational stability of the equipment.

[0016] Going a step further, such as Figures 1-3 As shown: In this scheme, the inner wall of the noise suppression box 1 is equipped with a sound insulation layer 31, and the outer side of the sound insulation layer 31 is equipped with equally spaced sponge panels 32. The noise suppression box 1 is equipped with a sound insulation cover 3 located inside and outside the engine muffler compartment 2. The sound insulation layer 31 and the sponge panels 32 are used for three-stage noise reduction treatment.

[0017] Going a step further, such as Figures 1-4 As shown, in this scheme, air outlet slits are provided on both sides of the gas inlet chamber 19, buffer plates 43 are installed on the outside of the inlet pipe 42 at equal intervals, and a side inspection cover 15 is installed on the outside of the noise suppression box 1. A handle 16 is fixedly connected to the outside of the side inspection cover 15. The side inspection cover 15 and the handle 16 work together to facilitate opening and maintenance of the inside of the noise suppression box 1.

[0018] In this scheme, an external dust cover 14 for use with the output shaft 27 is installed on one side of the noise suppression box 1. The noise suppression box 1 has an installation groove for the exhaust pipe 46 on the side opposite to the external dust cover 14. The inner wall of the inlet pipe 42 and the outside of the perforated pipe 45 are equipped with sound-absorbing cotton 44. The sound-absorbing cotton 44 and the buffer sheet 43 are used to buffer and partially silencing the gas generated inside the engine silencer chamber 2, thereby ensuring normal delivery to the gas treatment chamber 17 for processing. A valve is fixedly connected to one end of the exhaust pipe 46 extending to the outside. The valve is used to control the opening and closing of the exhaust pipe 46, thereby silencing and discharging the gas generated by the internal engine 26. Through multiple layers of silencing, the final noise suppression efficiency is improved.

[0019] In this design, the bottom of the bottom silencing plate 11 is fixedly connected to two symmetrically distributed bottom support frames 5. Both bottom support frames 5 are U-shaped structures, and the interior of each bottom support frame 5 is threaded with equally spaced second positioning bolts 51. The bottom support frames 5 and the second positioning bolts 51 are used to connect the overall equipment to the work site, which facilitates the adjustment of the installation position of the overall equipment. The U-shaped bottom support frame 5 provides convenient support and positioning, thereby improving the stability of the equipment during operation.

[0020] Going a step further, such as Figures 1-4 As shown, in this scheme, a wireless transceiver 13 is fixedly connected to the top of the top muffler 12. A main control board is fixedly connected inside the wireless transceiver 13, and a control chip is fixedly connected to the outside of the main control board. The wireless transceiver 13, the acoustic sensor 23, and the engine 26 are all electrically connected to the control chip. The control chip is used to control the operation of the wireless transceiver 13, the acoustic sensor 23, and the engine 26, thereby realizing unified management of electrical equipment.

[0021] Working principle: like Figures 1-4 As shown: By setting up a noise suppression box 1, an engine silencer chamber 2, and a soundproof cover 3, during use, the bottom silencer plate 11 and the top silencer plate 12 are used to seal the top and bottom of the noise suppression box 1. Polyurethane foam board 24 and wooden sound-absorbing board 25 are used for primary noise reduction. The silencer 4 and gas inlet chamber 19 are used for secondary noise reduction. The sound insulation layer 31 and sponge board 32 are used for tertiary noise reduction. Sound-absorbing cotton 44 and buffer sheet 43 are used to buffer and partially reduce noise when gas is generated inside the engine silencer chamber 2, thus ensuring normal delivery to the gas treatment chamber 17 for processing. A valve is fixedly connected to one end of the exhaust pipe 46 extending to the outside. The valve controls the opening and closing of the exhaust pipe 46, thereby reducing the noise generated by the internal engine 26. Noise emission treatment, through multiple stages of noise reduction, improves the final noise suppression efficiency. The control chip is used to control the operation of the wireless signal transceiver 13, acoustic sensor 23, and engine 26, realizing unified management of power equipment. The bottom support frame 5 and the second positioning bolt 51 are used to connect the overall equipment to the work site, which facilitates the adjustment of the installation position of the overall equipment. The U-shaped bottom support frame 5 facilitates support and positioning, thereby improving the stability of the equipment during operation. The side inspection cover 15 and handle 16 work together to facilitate opening and maintenance of the noise suppression box 1. The bottom fixing plate 21 and the first positioning bolt 22 work together to install the engine 26 and the engine silencer chamber 2, which improves the operational stability of the equipment.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An aircraft engine vibration control and noise suppression device, comprising a noise suppression box (1), characterized in that, The top of the noise suppression box (1) is fixedly connected to a top silencing plate (12), and the bottom of the noise suppression box (1) is fixedly connected to a bottom silencing plate (11). The noise suppression box (1) is equipped with an engine silencing chamber (2). An acoustic sensor (23) is installed on the top of the engine silencing chamber (2). An engine (26) is installed inside the engine silencing chamber (2). The output end of the engine (26) extends to the outside of the engine silencing chamber (2) and is fixedly connected to an output shaft (27). A wooden sound-absorbing panel (25) is installed on the inner wall of the engine silencing chamber (2). A polyurethane foam board (24) is installed on the outside of the wooden sound-absorbing panel (25) and inside the engine silencing chamber (2). An auxiliary noise reduction mechanism is installed at the bottom of the top muffler (12). The auxiliary noise reduction mechanism includes a gas treatment chamber (17). The bottom of the top muffler (12) is fixedly connected to the gas treatment chamber (17). A gas inlet chamber (19) is installed inside the gas treatment chamber (17). A muffler (4) extending into the gas inlet chamber (19) is installed at the bottom of the gas treatment chamber (17). An inlet pipe (42) is fixedly connected to the bottom of the muffler (4). Perforated pipes (45) are evenly distributed and extend into the engine muffler chamber (2) inside the inlet pipe (42). An exhaust pipe (46) extending to the outside of the noise suppression box (1) is installed on one side of the gas treatment chamber (17).

2. The aircraft engine vibration control and noise suppression device according to claim 1, characterized in that, Inside the engine muffler compartment (2) and at the bottom of the engine (26), a bottom fixing plate (21) is fixedly connected, and the bottom fixing plate (21) is threaded with symmetrically distributed first positioning bolts (22).

3. The aircraft engine vibration control and noise suppression device according to claim 1, characterized in that: The inner wall of the noise suppression box (1) is equipped with a sound insulation layer (31), and the outer side of the sound insulation layer (31) is equipped with equidistantly distributed sponge boards (32). The noise suppression box (1) is equipped with a sound insulation cover (3) inside and outside the engine muffler compartment (2).

4. The aircraft engine vibration control and noise suppression device according to claim 3, characterized in that, The gas inlet chamber (19) has air outlet slits on both sides. The inlet pipe (42) is equipped with buffer plates (43) that are evenly distributed. The noise suppression box (1) is equipped with a side inspection cover (15) on the outside. The side inspection cover (15) is fixedly connected with a handle (16).

5. The aircraft engine vibration control and noise suppression device according to claim 1, characterized in that, An external dust cover (14) for use with the output shaft (27) is installed on one side of the noise suppression box (1). An installation groove for use with the exhaust pipe (46) is opened on the side opposite to the external dust cover (14). Sound-absorbing cotton (44) is installed on the inner wall of the inlet pipe (42) and on the outside of the perforated pipe (45).

6. The aircraft engine vibration control and noise suppression device according to claim 1, characterized in that, The bottom of the bottom silencing plate (11) is fixedly connected to two symmetrically distributed bottom support frames (5), and the interior of the two bottom support frames (5) is threaded with equally spaced second positioning bolts (51).

7. The aircraft engine vibration control and noise suppression device according to claim 5, characterized in that, A wireless transceiver (13) is fixedly connected to the top of the top muffler plate (12). A main control board is fixedly connected inside the wireless transceiver (13). A control chip is fixedly connected to the outside of the main control board. The wireless transceiver (13), the acoustic sensor (23), and the engine (26) are all electrically connected to the control chip.

Images