Passive and active noise reduction system for diesel generating set

Abstract

The utility model discloses a passive and active noise reduction system for a diesel generating set. The passive and active noise reduction system comprises a passive noise reduction system and an active noise reduction system, the passive noise reduction system comprises a vibration reduction base and a sound insulation shell, a diesel engine and a generator connected with the diesel engine are arranged on the vibration reduction base, the diesel engine and the generator are located in the sound insulation shell, and the diesel engine is connected with a smoke exhaust pipeline; the active noise reduction system comprises a smoke exhaust pipeline active noise reduction system installed at an outlet of the end of the smoke exhaust pipeline, an air outlet pipeline active noise reduction system installed at an air outlet of the sound insulation shell and an air inlet pipeline active noise reduction system installed at an air inlet of the sound insulation shell. According to the system, a passive noise reduction technology and an active noise reduction technology are combined, noise suppression of a smoke outlet, an air inlet and an air outlet of the diesel generating set in a wide frequency band is effectively achieved, and the noise environment quality around the diesel generating set is remarkably improved; in addition, the system is convenient to install, good in vibration and noise reduction effect and good in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction equipment, in particular to a passive and active noise reduction system for a diesel generator set. Background Art

[0002] Diesel generator sets, essential emergency energy equipment in modern society, are widely used in various locations requiring continuous or emergency power supply, such as hospitals, data centers, high-rise buildings, and industrial facilities. However, these devices inevitably generate significant noise radiation during operation, causing serious environmental noise pollution. This not only affects the quality of life of surrounding residents, but can also interfere with the normal operation of precision instruments and even pose a threat to the hearing health of operators.

[0003] To address the noise issues generated by diesel generator sets, traditional passive noise reduction technologies are currently widely used. This technology primarily relies on a combination of physical barriers and sound-absorbing materials. Specifically, these include installing a soundproof enclosure around the diesel generator set and surrounding it with materials such as sound-absorbing cotton or sound-absorbing panels. These measures effectively absorb and isolate high-frequency noise components, thereby reducing noise levels to a certain extent.

[0004] While traditional passive noise reduction technology is effective at reducing high-frequency noise, it's less effective at suppressing low-frequency noise. This is because low-frequency noise has strong penetrating power and diffraction capabilities, making it difficult to effectively isolate with simple physical barriers and sound-absorbing materials. Given the limitations of traditional passive noise reduction technology in addressing low-frequency noise, the industry has been exploring more effective noise reduction solutions. Utility Model Content

[0005] To address the aforementioned issues, the present invention provides a passive and active noise reduction system for diesel generator sets. This system integrates a passive noise reduction system with an active noise reduction system, demonstrating significant advantages in suppressing low-frequency noise. This system not only retains the advantages of traditional passive noise reduction technology, namely its effectiveness in suppressing high-frequency noise, but also cleverly incorporates active noise reduction technology to enhance its ability to suppress low-frequency noise. Through this organic combination of the two, the passive and active noise reduction system for diesel generator sets achieves enhanced noise reduction and adaptability, meeting increasingly stringent environmental protection requirements and users' urgent need for a quiet working environment.

[0006] The utility model is achieved through the following technical solutions:

[0007] A passive and active noise reduction system for a diesel generator set, comprising a passive noise reduction system and an active noise reduction system; the passive noise reduction system comprises a vibration reduction base and a soundproof shell mounted on the vibration reduction base; a diesel engine and a generator connected to the diesel engine are provided on the vibration reduction base; the diesel engine and the generator are located within the soundproof shell; the diesel engine is connected to a smoke exhaust duct, the end of the smoke exhaust duct extends outside the soundproof shell and is connected to a filter; an air inlet on one side of the soundproof shell is provided with an air inlet grille for air intake, and an air outlet on the other side is provided with an air outlet grille for air outlet; the active noise reduction system comprises an exhaust duct active noise reduction system installed at the end outlet of the exhaust duct, an outlet duct active noise reduction system installed at the air outlet of the soundproof shell, and an intake duct active noise reduction system installed at the air inlet of the soundproof shell.

[0008] In one embodiment of the present invention, the smoke exhaust duct active noise reduction system includes a smoke exhaust duct ANC controller, a smoke exhaust duct reference sensor, a smoke exhaust duct speaker, and a smoke exhaust duct error sensor, and the ANC controller is electrically connected to the smoke exhaust duct reference sensor, the smoke exhaust duct speaker, and the smoke exhaust duct error sensor.

[0009] In one embodiment of the present utility model, a smoke exhaust duct grille is provided at the end outlet of the smoke exhaust duct; the smoke exhaust duct ANC controller is installed on a soundproof shell, and the smoke exhaust duct reference sensor, the smoke exhaust duct speaker, and the smoke exhaust duct error sensor are successively located on the inner wall at the end outlet of the smoke exhaust duct; the smoke exhaust duct error sensor is located on a side close to the smoke exhaust duct grille; the smoke exhaust duct speaker is located between the smoke exhaust duct error sensor and the smoke exhaust duct reference sensor.

[0010] In one embodiment of the present utility model, the air outlet duct active noise reduction system includes an air outlet duct ANC controller, an air outlet duct reference sensor, an air outlet duct speaker, and an air outlet duct error sensor, and the air outlet duct ANC controller is electrically connected to the air outlet duct reference sensor, the air outlet duct speaker, and the air outlet duct error sensor.

[0011] In one embodiment of the present utility model, the air outlet duct ANC controller is installed below the air outlet grille; the air outlet duct reference sensor, the air outlet duct speaker, and the air outlet duct error sensor are located in sequence on the inner wall of the air outlet of the sound insulation shell; the air outlet duct error sensor is located on the side close to the air outlet grille, and the air outlet duct speaker is located between the air outlet duct error sensor and the air outlet duct reference sensor.

[0012] In an embodiment of the utility model, the air intake pipeline active noise reduction system includes air intake pipeline ANC controller, air intake pipeline reference sensor, air intake pipeline speaker and air intake pipeline error sensor, the ANC controller with air intake pipeline reference sensor, air intake pipeline speaker and air intake pipeline error sensor electricity is connected.

[0013] In an embodiment of the utility model, the air intake pipeline ANC controller is installed below the air inlet grille;Air intake pipeline reference sensor, air intake pipeline speaker, air intake pipeline error sensor are sequentially located on the inner wall at the air inlet of the soundproof shell;Air intake pipeline error sensor is located on the side close to the air inlet grille, and the air intake pipeline speaker is located between the air intake pipeline error sensor and the air intake pipeline reference sensor.

[0014] In an embodiment of the utility model, the filter screen is detachably connected in the smoke exhaust pipeline, and the filter screen is located outside the soundproof shell.

[0015] In an embodiment of the utility model, the smoke exhaust pipeline reference sensor, the smoke exhaust pipeline speaker and the smoke exhaust pipeline error sensor are located between the filter screen and the smoke exhaust pipeline grille.

[0016] In an embodiment of the utility model, the soundproof shell is made of soundproof and heat dissipation material.

[0017] Compared with the prior art, the utility model has the advantages of the following:

[0018] The utility model discloses a passive and active noise reduction system for diesel generating set, including passive noise reduction system and active noise reduction system;Passive noise reduction system includes soundproof shell, detachable replacement formula filter screen, smoke exhaust pipeline grille, air outlet grille, air inlet grille and damping base, utilizes the smoke dust filtration technology of soundproof shell and filter screen and realizes the effective inhibition of high frequency noise;Active noise reduction system includes reference sensor, error sensor, speaker and ANC controller, and this system sets up active noise reduction system at the smoke exhaust pipeline outlet, the air outlet of soundproof shell and the air inlet of soundproof shell respectively, realizes the control of middle and low frequency noise at the smoke exhaust pipeline outlet, the air outlet of soundproof shell and the air inlet of soundproof shell respectively, reduces the energy of low frequency noise generated by diesel generating set at the outlet, improves the overall noise reduction performance of system, improves surrounding environmental noise quality.This system combines passive noise reduction technology and active noise reduction technology, effectively realizes the noise suppression of smoke exhaust, air inlet and air outlet of diesel generating set in relatively wide frequency band, significantly improves the noise environmental quality around diesel generating set;In addition, the system is convenient to install, and the damping and noise reduction effect is good, and the stability is good.

[0019] Thus, this utility model integrates an active noise reduction system with a passive one, demonstrating significant advantages in suppressing low-frequency noise. This utility model not only retains the advantages of traditional passive noise reduction technology, namely its effectiveness in suppressing high-frequency noise, but also cleverly introduces active noise reduction technology to enhance its ability to suppress low-frequency noise. This organic combination of the two results in a combined passive and active noise reduction system for diesel generator sets with enhanced noise reduction effectiveness and adaptability, meeting increasingly stringent environmental protection requirements and users' urgent need for a quiet working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model provides a structural schematic diagram of a passive and active noise reduction system for a diesel generator set.

[0021] Figure 2 This is a structural schematic diagram of the active noise reduction system for smoke exhaust ducts provided by the utility model.

[0022] Figure 3 This is a structural diagram of the active noise reduction system for the air intake duct provided by the utility model.

[0023] Figure 4 This is a structural diagram of the active noise reduction system for the air outlet pipe provided by the utility model.

[0024] In the figure: 1. Sound insulation shell; 2. Smoke exhaust duct ANC controller; 3. Filter; 4. Smoke exhaust duct reference sensor; 5. Smoke exhaust duct speaker; 6. Smoke exhaust duct error sensor; 7. Smoke exhaust duct grille; 8. Air outlet duct ANC controller; 9. Air outlet duct reference sensor; 10. Air outlet duct speaker; 11. Air outlet duct error sensor; 12. Air outlet grille; 13. Air intake duct ANC controller; 14. Air intake duct reference sensor; 15. Air intake duct speaker; 16. Air intake duct error sensor; 17. Air intake grille; 18. Diesel engine; 19. Generator; 20. Smoke exhaust duct; 21. Vibration reduction base. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The present invention provides a passive and active noise reduction system for a diesel generator set, including a passive noise reduction system and an active noise reduction system; the passive noise reduction system includes a vibration reduction base 21 and a soundproof housing 1 installed on the vibration reduction base 21, a diesel engine 18 and a generator 19 connected to the diesel engine 18 are installed on the vibration reduction base 21, the diesel engine 18 and the generator 19 are located in the soundproof housing 1, the diesel engine 18 is connected to a smoke exhaust duct 20, the end of the smoke exhaust duct 20 extends outside the soundproof housing 1 and is connected to a filter 3; an air inlet on one side of the soundproof housing 1 is provided with an air inlet grille 17 for air intake, and an air outlet on the other side is provided with an air outlet grille 12 for air outlet; the active noise reduction system includes an exhaust duct active noise reduction system installed at the outlet of the exhaust duct 20, an outlet duct active noise reduction system installed at the outlet of the soundproof housing 1, and an intake duct active noise reduction system installed at the air inlet of the soundproof housing 1.

[0029] In some embodiments, the smoke exhaust duct active noise reduction system includes a smoke exhaust duct ANC controller 2, a smoke exhaust duct reference sensor 4, a smoke exhaust duct speaker 5, and a smoke exhaust duct error sensor 6, and the ANC controller 2 is electrically connected to the smoke exhaust duct reference sensor 4, the smoke exhaust duct speaker 5, and the smoke exhaust duct error sensor 6.

[0030] Furthermore, a smoke exhaust duct grille 7 is provided at the end outlet of the smoke exhaust duct 20; the smoke exhaust duct ANC controller 2 is installed on the sound insulation shell 1, and the smoke exhaust duct reference sensor 4, the smoke exhaust duct speaker 5, and the smoke exhaust duct error sensor 6 are located in sequence on the inner wall at the end outlet of the smoke exhaust duct 20; the smoke exhaust duct error sensor 6 is located on the side close to the smoke exhaust duct grille 7; the smoke exhaust duct speaker 5 is located between the smoke exhaust duct error sensor 6 and the smoke exhaust duct reference sensor 4.

[0031] In this embodiment, the smoke exhaust duct ANC controller 2 is used to provide a secondary sound source for the smoke exhaust duct speaker 5 based on the reference signal provided by the smoke exhaust duct reference sensor 4 and the error signal provided by the smoke exhaust duct error sensor 6 using adaptive control technology, thereby canceling out the noise interference at the outlet of the smoke exhaust duct 20 to achieve noise reduction.

[0032] In some embodiments, the outlet duct active noise reduction system includes an outlet duct ANC controller 8, an outlet duct reference sensor 9, an outlet duct speaker 10, and an outlet duct error sensor 11, and the outlet duct ANC controller 8 is electrically connected to the outlet duct reference sensor 9, the outlet duct speaker 10, and the outlet duct error sensor 11.

[0033] Furthermore, the air outlet duct ANC controller 8 is installed below the air outlet grille 12; the air outlet duct reference sensor 9, the air outlet duct speaker 10, and the air outlet duct error sensor 11 are located in sequence on the inner wall of the air outlet of the sound insulation shell 1; the air outlet duct error sensor 11 is located on the side close to the air outlet grille 12, and the air outlet duct speaker 10 is located between the air outlet duct error sensor 11 and the air outlet duct reference sensor 9.

[0034] In this embodiment, the air outlet duct ANC controller 8 is used to provide a secondary sound source for the air outlet duct speaker 10 based on the reference signal provided by the air outlet duct reference sensor 9 and the error signal provided by the air outlet duct error sensor 11 using adaptive control technology, thereby canceling out the noise interference at the air outlet of the sound insulation shell 1 to achieve noise reduction.

[0035] In some embodiments, the intake duct active noise reduction system includes an intake duct ANC controller 13, an intake duct reference sensor 14, an intake duct speaker 15, and an intake duct error sensor 16, and the ANC controller 13 is electrically connected to the intake duct reference sensor 14, the intake duct speaker 15, and the intake duct error sensor 16.

[0036] Further, the intake pipeline ANC controller 13 is installed below the intake grille 17; the intake pipeline reference sensor 14, the intake pipeline loudspeaker 15, and the intake pipeline error sensor 16 are sequentially arranged on the inner wall at the intake port of the soundproof shell 1; the intake pipeline error sensor 16 is located on the side close to the intake grille 17, and the intake pipeline loudspeaker 15 is located between the intake pipeline error sensor 16 and the intake pipeline reference sensor 14.

[0037] In the embodiment, the intake pipeline ANC controller 13 is used to provide a secondary sound source for the intake pipeline loudspeaker 15 according to the reference signal provided by the intake pipeline reference sensor 14 and the error signal provided by the intake pipeline error sensor 16, so as to realize noise reduction by interference cancellation with the noise at the intake port of the soundproof shell 1.

[0038] In some embodiments, the filter screen 3 is detachably connected in the exhaust pipeline 20, and the filter screen 3 is located outside the soundproof shell 1.

[0039] In the embodiment, the detachable and replaceable filter screen 3 is arranged in the exhaust pipeline 20, and heat dissipation and smoke dust filtration are realized through the filter screen 3.

[0040] Further, the exhaust pipeline reference sensor 4, the exhaust pipeline loudspeaker 5, and the exhaust pipeline error sensor 6 are located between the filter screen 3 and the exhaust pipeline grille 7.

[0041] Preferably, the soundproof shell 1 is made of soundproof and heat-dissipating material.

[0042] In a specific implementation, if the diesel generator set is in a rated working state, the generated noise is stable, and the active noise reduction system can be further simplified. The simplified active noise reduction system includes the exhaust pipeline ANC controller 2, the exhaust pipeline loudspeaker 5, the exhaust pipeline ANC controller 8, the exhaust pipeline loudspeaker 10, the intake pipeline ANC controller 13, and the intake pipeline loudspeaker 15, without reference sensors and error sensors, thereby reducing the hardware cost and the complexity of the system.

[0043] In summary, the utility model discloses a kind of passive and active noise reduction system for diesel generating set, including passive noise reduction system and active noise reduction system;Passive noise reduction system includes soundproof shell, detachable replacement formula filter screen, flue gas duct grating, air outlet grating, air inlet grating and damping pedestal, and the effective suppression of high frequency noise is realized using the smoke dust filtering technology of soundproof shell and filter screen;Active noise reduction system includes reference sensor, error sensor, loudspeaker and ANC controller, the active noise reduction system is set respectively at the outlet of flue gas duct, the air outlet of soundproof shell and the air inlet of soundproof shell, respectively realizes the control of middle-low frequency noise at the outlet of flue gas duct, the air outlet of soundproof shell and the air inlet of soundproof shell, reduces the energy of low frequency noise generated by diesel generating set at the outlet, improves the overall noise reduction performance of system, improves surrounding environmental noise quality.The system combines passive noise reduction technology and active noise reduction technology, effectively realizes the noise suppression of flue gas outlet, air inlet and air outlet of diesel generating set in relatively wide frequency band, significantly improves the noise environment quality around diesel generating set;In addition, the system is easy to install, and the damping noise reduction effect is good, and the stability is good.

[0044] Therefore, the utility model introduces active noise reduction system on the basis of passive noise reduction system, and shows significant advantages for low frequency noise suppression.The utility model not only retains the advantages of traditional passive noise reduction technology, i.e.

[0045] The technical features of the above embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0046] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the invention patent.The skilled in the art should note that, without departing from the concept of the utility model, a number of modifications and improvements can be made, and these all belong to the protection scope of the utility model.

[0047] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, without departing from the principles of the present invention, various improvements and modifications can be made to the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention. Therefore, the scope of protection of this utility model patent shall be based on the appended claims.

Claims

1. A passive and active noise reduction system for a diesel generator set, characterized in that: The invention comprises a passive noise reduction system and an active noise reduction system; the passive noise reduction system comprises a vibration reduction base (21) and a sound insulation shell (1) mounted on the vibration reduction base (21); a diesel engine (18) and a generator (19) connected to the diesel engine (18) are arranged on the vibration reduction base (21); the diesel engine (18) and the generator (19) are located in the sound insulation shell (1); the diesel engine (18) is connected to a smoke exhaust pipe (20); the end of the smoke exhaust pipe (20) extends out of the sound insulation shell (1); The soundproof shell (1) is provided with a filter (3) on the outside thereof; an air inlet on one side of the soundproof shell (1) is provided with an air inlet grille (17) for air intake, and an air outlet on the other side is provided with an air outlet grille (12) for air outlet; the active noise reduction system comprises an exhaust pipe active noise reduction system installed at the end outlet of the exhaust pipe (20), an outlet pipe active noise reduction system installed at the air outlet of the soundproof shell (1), and an intake pipe active noise reduction system installed at the air inlet of the soundproof shell (1).

2. A passive and active noise reduction system for a diesel generator set according to claim 1, characterized in that: The smoke exhaust duct active noise reduction system comprises a smoke exhaust duct ANC controller (2), a smoke exhaust duct reference sensor (4), a smoke exhaust duct speaker (5), and a smoke exhaust duct error sensor (6); the smoke exhaust duct ANC controller (2) is electrically connected to the smoke exhaust duct reference sensor (4), the smoke exhaust duct speaker (5), and the smoke exhaust duct error sensor (6).

3. A passive and active noise reduction system for a diesel generator set according to claim 2, characterized in that: The end outlet of the smoke exhaust duct (20) is provided with a smoke exhaust duct grille (7); the smoke exhaust duct ANC controller (2) is installed on the sound insulation shell (1); the smoke exhaust duct reference sensor (4), the smoke exhaust duct loudspeaker (5), and the smoke exhaust duct error sensor (6) are sequentially located on the inner wall of the end outlet of the smoke exhaust duct (20); the smoke exhaust duct error sensor (6) is located on a side close to the smoke exhaust duct grille (7); and the smoke exhaust duct loudspeaker (5) is located between the smoke exhaust duct error sensor (6) and the smoke exhaust duct reference sensor (4).

4. A passive and active noise reduction system for a diesel generator set according to claim 3, characterized in that: The air outlet duct active noise reduction system comprises an air outlet duct ANC controller (8), an air outlet duct reference sensor (9), an air outlet duct speaker (10), and an air outlet duct error sensor (11), wherein the air outlet duct ANC controller (8) is electrically connected to the air outlet duct reference sensor (9), the air outlet duct speaker (10), and the air outlet duct error sensor (11).

5. The passive and active noise reduction system for a diesel generator set according to claim 4, characterized in that: The air outlet duct ANC controller (8) is installed below the air outlet grille (12); the air outlet duct reference sensor (9), the air outlet duct speaker (10), and the air outlet duct error sensor (11) are sequentially located on the inner wall of the air outlet of the sound insulation shell (1); the air outlet duct error sensor (11) is located on a side close to the air outlet grille (12), and the air outlet duct speaker (10) is located between the air outlet duct error sensor (11) and the air outlet duct reference sensor (9).

6. The passive and active noise reduction system for a diesel generator set according to claim 5, characterized in that: The intake duct active noise reduction system comprises an intake duct ANC controller (13), an intake duct reference sensor (14), an intake duct speaker (15), and an intake duct error sensor (16); the intake duct ANC controller (13) is electrically connected to the intake duct reference sensor (14), the intake duct speaker (15), and the intake duct error sensor (16).

7. The passive and active noise reduction system for a diesel generator set according to claim 6, characterized in that: The air intake duct ANC controller (13) is installed below the air intake grille (17); the air intake duct reference sensor (14), the air intake duct speaker (15), and the air intake duct error sensor (16) are sequentially located on the inner wall of the air intake of the sound insulation shell (1); the air intake duct error sensor (16) is located on a side close to the air intake grille (17), and the air intake duct speaker (15) is located between the air intake duct error sensor (16) and the air intake duct reference sensor (14).

8. The passive and active noise reduction system for a diesel generator set according to claim 7, characterized in that: The filter (3) is detachably connected to the smoke exhaust pipe (20), and the filter (3) is located outside the sound insulation housing (1).

9. The passive and active noise reduction system for a diesel generator set according to claim 8, characterized in that: The smoke exhaust duct reference sensor (4), the smoke exhaust duct speaker (5), and the smoke exhaust duct error sensor (6) are located between the filter (3) and the smoke exhaust duct grille (7).

10. A passive and active noise reduction system for a diesel generator set according to any one of claims 1 to 9, characterized in that: The sound insulation housing (1) is made of sound insulation and heat dissipation material.

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