EP3864648B1 - Ensemble générateur - Google Patents

Ensemble générateur Download PDF

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Publication number
EP3864648B1
EP3864648B1 EP18789024.9A EP18789024A EP3864648B1 EP 3864648 B1 EP3864648 B1 EP 3864648B1 EP 18789024 A EP18789024 A EP 18789024A EP 3864648 B1 EP3864648 B1 EP 3864648B1
Authority
EP
European Patent Office
Prior art keywords
resonator
generator set
frequency
engine
base frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18789024.9A
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German (de)
English (en)
Other versions
EP3864648A1 (fr
Inventor
Francesco Degano
Carlo PESTELLI
Virpi HANKANIEMI
Zengxin GAO
Moreno ALMERIGOGNA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila Finland Oy
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Wartsila Finland Oy
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Publication of EP3864648A1 publication Critical patent/EP3864648A1/fr
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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • F02B63/044—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators the engine-generator unit being placed on a frame or in an housing
    • F02B2063/045—Frames for generator-engine sets

Definitions

  • the present invention relates to a generator set comprising an internal combustion piston engine, an electric generator mechanically coupled with the internal combustion piston engine so as to receive power to rotate the electric generator and a common base frame which the internal combustion piston engine and the electric generator are supported on and attached to according to the preamble of claim 1.
  • the engine is mounted on a particular solid base frame, which in turn is supported to a floor of a power plant, be it a stationary assembly, or to a land vehicle or a marine vessel.
  • a generator set which may also be referred to as a gen-set.
  • the electric generator is mechanically coupled with the engine so that the engine provides power to the electric generator which in turn generates electric power to a grid to which it is connected.
  • RU2014123906A discloses soundproofing covering of a room by a soundproofing front flat-sheet and/or soundproofing non-flat formed panel, spaced mounted with reference to an oppositely located ceiling of the room, with the formation of respective closed air cavities.
  • KR20040003825A discloses an intake noise reducing apparatus which comprises a resonator communicated to an intake duct, an oil tank filled with an oil, a communicating pipe which allows for flow of oil between the resonator and the oil tank, the first sliding member which moves in a vertical direction in accordance with the height of the level of the oil in the resonator so as to change the volume of the resonator, the second sliding member which moves in a vertical direction in accordance with the height of the level of the oil in the oil tank, a potentiometer for detecting the height of the level of the oil in the oil tank, an actuator for moving the second sliding member in a vertical direction so as to adjust the height of the level of the oil in the oil tank; and an electronic control unit for determining the reference height on the basis of the engine RPM, and driving the actuator in such a manner that the level of the oil detected by the potentiometer reaches the reference height.
  • JPH10266870A discloses an active noise control system for generator set comprising a reference microphone and an anti-noise speaker in connection with an exhaust duct of an engine, the anti-noise speaker being arranged for generating a cancelling sound for cancelling the noise in the duct outlet on the basis of a reference signal and an error signal is controlled by the active noise control means.
  • JP2003108148A discloses an enclosure for a generator set comprises resonator chambers arranged to corners of the enclosure for attenuating noise generated by the generator set. Even if the solution may be advantageous as such, the resonator chambers inevitably consumes extra space which will be experienced either by limited inner space of the enclosure or by volume occupied by the enclosure.
  • US 4 733 750 A and DE 20 2017 101269 U1 disclose an enclosure for an engine or a generator set with a sound absorbing material at the base.
  • An object of the invention is to provide a generator set in which attenuation of noise to the surrounding air is considerably improved compared to the prior art solutions while the space consumption is minimized.
  • a generator set comprising an internal combustion piston engine, an electric generator mechanically coupled with the internal combustion piston engine, is provided with a common base frame, which is provided with plurality of resonator units comprising a bordered resonator space, which resonator space is provided with at least one communication port so as to allow communication between the resonator space and its surroundings.
  • the resonator units are integrated or attached to the source of noise. Even the large generator set is in a building the walls of which may attenuate the noise to some extent, by means of the present invention it is possible to decrease the noise level already in the building. Also, this way the resonator units effect to the direct noise wave from the source and not so much to noise reflected from the walls of the building.
  • the resonator unit is a Helmholtz resonator in which the resonator space is arranged in communication with the surroundings via at least one neck as a communication port.
  • the resonator space comprises an air filled resonator space.
  • the resonator space is at least partially formed by the structure of the base frame. This provides a further effect of inter alia material savings and results in a compact structure.
  • the resonator unit is prefabricated resonator unit, separate to, and removably attached to the base frame. This provides a further effect of making it possible to assemble the resonator units into existing generator sets.
  • the resonator unit is a perforated wall noise absorber in which the resonator space is arranged in communication with the surroundings via a perforation in at least one wall of the resonator unit.
  • the generator set comprises more than two resonator units, each tuned to attenuate a same frequency.
  • the generator set comprises a first set of resonator units tuned to attenuate a first frequency, and a second set of resonator units tuned to attenuate a second frequency.
  • the resonator unit advantageously is tuned to attenuate a frequency corresponding to the firing frequency of the internal combustion piston engine.
  • the generator set comprises a computer controller unit configured to run the engine at constant speed (RPM), and that internal combustion piston engine is a four-stroke engine and the resonator unit is tuned to attenuate
  • the resonator unit is tuned to attenuate a base firing frequency of the engine and the first order harmonics of the firing frequency of the engine.
  • Figures 1 and 2 depict schematically an internal combustion piston engine 10 which is coupled with an electric generator 12 together forming a generator set 14.
  • Figure 1 shows a side view of the generator set 14 and an end view II of the generator set in the direction of the arrow in the left margin of the Figure 1 is shown in the Figure 2 .
  • the internal combustion piston engine 10 and the electric generator 12 of the generator set 14 are mechanically coupled with each other via drive shafts using a suitable coupling so as to transmit power from the engine to rotate the electric generator 12.
  • the generator set has a common base frame 16 on which the internal combustion piston engine 10 and the electric generator 12 are supported, and also releasably attached to the base frame 16.
  • Figure 3 there is shown a detail view of the base frame 16 according to an embodiment of the invention.
  • the base frame 16 is constructed of suitable steel such that it comprises at least two parallel longitudinal beams 18.1, 18.2 substantially parallel with the longitudinal direction of the engine 10.
  • the longitudinal beams 18.1 and 18.2 are coupled with each other e.g. by means of cross-beams 18.3 at least at the ends of the longitudinal beams 18.1, 18.2 of suitable length providing suitable distance between the longitudinal beams for rigidly supporting the engine 10 and the generator 12 as desired.
  • the base frame 16 of the generator set 14 is provided with plurality of resonator units 20 configured to attenuate noise generated by the generator set when in use.
  • the resonator unit are tuned to attenuate low frequency noise having frequency below 200 Hz.
  • the engine is configured to run at constant speed when in use, and therefore the noise emitted from the generator set 14 a substantially constant frequency spectrum.
  • the resonator units are configured, or tuned, to attenuate noise at certain frequency, which effectively attenuates the noise right where it is generated, that is in close proximity to the engine 10 of the generator set 14.
  • the resonator unit 20 comprises a bordered resonator space 22, which may be referred to as a resonator cavity as well, which is filled only with the air, thus being a reactive noise absorber.
  • Each resonator space is provided with at least one communication port 24 so as to allow communication between the resonator space and its surrounding air.
  • the longitudinal beams 18.1, 18.2 form a vertical wall of the base frame at its sides, and is therefore called as a side wall.
  • the side wall is otherwise solid, except that there is the at least one communication port 24 arranged to the wall.
  • the resonator space 22 is inside the longitudinal beam 18.1, 18.2, 18.3, under the engine 10 and the electric generator 12. In the embodiments of the Figures 1 to 3 the resonator space 22 is at least partially formed and bordered by the structure of the base frame 16.
  • the base frame 16 is provided with intermediate walls 26 and an end wall 28 which border the number of resonator cavities 22 in the base frame 16.
  • the intermediate walls 26 are substantially perpendicular to the vertical side wall of the longitudinal beams 18.1, 18.2 and the end wall 28 is parallel to the vertical side wall of the longitudinal beams 18.1, 18.2.
  • the number of separate resonator units 20 in the base frame 16 is at least twenty units 20. This way an effective combined attenuation effect of the noise can be obtained practically without consuming extra space for the purpose.
  • the base frame 16 is provided with a plurality of separate resonator units 20.
  • the resonator unit 20 shown in the Figures 1 to 3 is a Helmholtz resonator in which the resonator space 22 is arranged in communication with the surrounding air via at least one neck 32 as a communication port 24.
  • the neck 32 may be a tube or a channel of other suitable cross sectional area, such a square or quadrangle, or alike.
  • the dimensioning of a Helmholtz resonator to attenuate a selected frequency is known as such for a skilled person in the art.
  • all the resonator units are tuned to attenuate noise at a same frequency.
  • the resonator units are tuned to attenuate a firing frequency of the internal combustion piston engine.
  • the generator set 14 comprises a first set of resonator units 20.1 tuned to attenuate a first frequency, and a second set of resonator units 20.2 tuned to attenuate a second frequency.
  • the first and the second frequency are different frequencies.
  • the first frequency is a firing frequency of the internal combustion piston engine and the second frequency is a second order harmonics of the firing frequency.
  • RPM constant speed
  • C the number of cylinders.
  • RPM constant speed
  • combustion frequency is 112,5 Hz.
  • the resonator unit is a perforated wall noise absorber in which the resonator space is arranged in communication with the surroundings via a perforation in at least one wall of the resonator unit 20.
  • the resonator unit is a separate prefabricated resonator unit 20'.
  • the prefabricated resonator unit 20' is an individual entity which has a body with the resonator space and one or more a communication ports 24.
  • Such a prefabricated resonator unit 20' is removably attached to the base frame 16.
  • the communication port may open into a space under the engine 10 and the electric generator 12.
  • Figure 4 also illustrates the aspect of the invention according to which the generator set 14 comprises a first set of resonator units 20.1' tuned to attenuate a first frequency, and a second set of resonator units 20.2' tuned to attenuate a second frequency.
  • the first and the second frequency are different frequencies.
  • the base frame may be provided with openings through which the communication ports 24 are in connection with the surrounding air.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (14)

  1. Groupe électrogène (14) comprenant un moteur à piston à combustion interne (10), un générateur électrique (12) couplé mécaniquement au moteur à piston à combustion interne (10) de manière à recevoir de l'énergie pour faire tourner le générateur électrique (12) et un châssis de base commun (16) est construit en acier approprié de sorte qu'il comprenne au moins deux poutres longitudinales parallèles (18.1, 18.2) sensiblement parallèles à la direction longitudinale du moteur (10), et les au moins deux poutres longitudinales parallèles (18.1, 18.2) sont couplées les unes aux autres au moins aux extrémités des poutres longitudinales (18.1, 18.2) au moyen de poutres transversales (18.3) de longueur appropriée fournissant une distance appropriée entre les poutres longitudinales (18.1, 18.2), sur lequel châssis de base commun (16) le moteur à piston à combustion interne et le générateur électrique (12) sont supportés et fixés, caractérisé en ce que le châssis de base (16) du groupe électrogène (14) est pourvu d'une pluralité d'unités résonatrices (20, 20') comprenant un espace de résonateur délimité (22), lequel espace de résonateur (22) est pourvu d'au moins un port de communication (24) de manière à permettre la communication entre l'espace de résonateur (22) et son environnement, et dans lequel l'espace de résonateur (22) est à l'intérieur de la poutre longitudinale (18.1, 18.2, 18.3) sous le moteur (10) et le générateur électrique (12).
  2. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que le châssis de base (16) est pourvu de parois intermédiaires (26) et d'une paroi de fond (28) qui bordent le nombre de cavités de résonateur (22) dans le châssis de base (16).
  3. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que le nombre d'unités de résonateur séparées (20) dans le châssis de base (16) est d'au moins vingt unités (20).
  4. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que le bloc de résonateur (20') est un bloc de résonateur préfabriqué séparé.
  5. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que le bloc de résonateur (20, 20') est un résonateur de Helmholtz dont l'espace de résonateur (22) est agencé en communication avec l'environnement via au moins un col (32) en tant qu'orifice de communication (24).
  6. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que l'espace de résonateur (22) comprend un espace de résonateur rempli d'air (22).
  7. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que l'espace de résonateur (22) est au moins partiellement formé par la structure du châssis de base (16).
  8. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que le bloc de résonateur est un bloc de résonateur préfabriqué (20'), séparé et fixé de manière amovible au châssis de base (16).
  9. Groupe électrogène (14) selon la revendication 1, caractérisé en ce que le bloc de résonateur (20, 20') est un absorbeur de bruit à paroi perforée dans lequel l'espace de résonateur (22) est agencé en communication avec l'environnement par une perforation dans au moins une paroi de l'unité de résonateur (20, 20').
  10. Groupe électrogène (14) selon la revendication 1 ou 5, caractérisé en ce que le groupe électrogène (14) comprend plus de deux ensembles de résonateurs (20, 20'), étant chacun accordés pour atténuer une même fréquence.
  11. Groupe électrogène (14) selon la revendication 1 ou 5, caractérisé en ce que le groupe générateur (14) comprend un premier ensemble d'unités de résonateur (20.1, 20.1') accordées pour atténuer une première fréquence, et un deuxième ensemble d'unités de résonateur (20.2, 20.2') accordées pour atténuer une deuxième fréquence.
  12. Groupe électrogène (14) selon la revendication 10 ou 11, caractérisé en ce que l'unité de résonateur (20, 20') est accordée pour atténuer une fréquence d'allumage du moteur à piston à combustion interne.
  13. Groupe électrogène (14) selon la revendication 10, caractérisé en ce que le groupe électrogène (14) comprend une unité de contrôleur informatique configurée pour faire tourner le moteur à vitesse constante (RPM), et que le moteur à piston à combustion interne est un moteur à quatre temps et l'unité de résonateur (20, 20') est accordée pour atténuer une première fréquence
    F1 [Hz] = RPM / (60 x 2) x C, où
    F1 est la première fréquence,
    RPM est la vitesse constante en tours par minute,
    C est le nombre de cylindres.
  14. Groupe électrogène (14) selon la revendication 11, caractérisé en ce que le groupe électrogène (14) comprend une unité de contrôleur informatique configurée pour faire tourner le moteur à vitesse constante (RPM), et que le moteur à piston à combustion interne est un moteur à quatre temps et l'unité de résonateur (20, 20') est accordée pour atténuer
    une première fréquence F1 [Hz] = RPM / (60 x 2) x C, et une seconde fréquence F2 [Hz] = RPM / (60 x 2) x C x 2, où
    F1 est la première fréquence, F2 est la deuxième fréquence, RPM est la vitesse constante en tours par minute, C est le nombre de cylindres.
EP18789024.9A 2018-10-10 2018-10-10 Ensemble générateur Active EP3864648B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/077543 WO2020074074A1 (fr) 2018-10-10 2018-10-10 Ensemble générateur

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Publication Number Publication Date
EP3864648A1 EP3864648A1 (fr) 2021-08-18
EP3864648B1 true EP3864648B1 (fr) 2022-11-30

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WO (1) WO2020074074A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10266870A (ja) * 1997-03-25 1998-10-06 Kubota Corp 包囲型エンジンの騒音低減装置
JP2003108148A (ja) * 2001-09-27 2003-04-11 Eico Systems Kk 発電装置及び発電装置の内部に発生する音の吸音方法
KR20040003825A (ko) * 2002-07-04 2004-01-13 현대자동차주식회사 차량의 흡기소음 저감장치
RU2579104C2 (ru) * 2014-06-10 2016-03-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тольяттинский государственный университет" Звукоизолирующая зашивка технического помещения

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WO2020074074A1 (fr) 2020-04-16
EP3864648A1 (fr) 2021-08-18

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