JP2010024824A - Noise silencer for construction machine - Google Patents

Noise silencer for construction machine Download PDF

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Publication number
JP2010024824A
JP2010024824A JP2009168691A JP2009168691A JP2010024824A JP 2010024824 A JP2010024824 A JP 2010024824A JP 2009168691 A JP2009168691 A JP 2009168691A JP 2009168691 A JP2009168691 A JP 2009168691A JP 2010024824 A JP2010024824 A JP 2010024824A
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engine compartment
noise
noise silencer
sectional shape
engine
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Seok Jeon Beom
セオク ジェオン べオム
Toshimichi Ikeda
利通 池田
Wook Sung Yuk
スン ユク ウック
Ho Jun Lee
ジュン リー ホ
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Volvo Construction Equipment AB
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Volvo Construction Equipment AB
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/12—Filtering, cooling, or silencing cooling-air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise silencer for a construction machine constituted to minimize outward emission of noises generated from an engine compartment. <P>SOLUTION: The noise silencer for reducing noises emitted through an air intake port and an air exhaust port of the engine compartment of the construction machine comprises: a frame 12 mounted to at least one of the air intake port and air exhaust port of the engine compartment; and noise damping members 15 fixed to the frame 12 at uniform intervals, and each comprising a first member 13 formed in a horizontal state inside the engine compartment so that cooling air flowing into the engine compartment from the outside of the engine compartment by driving a cooling fan flows smoothly, and a second member 14 formed integrally with the first member 13 and formed in an upward inclined state at a predetermined angle on the outside of the engine compartment in order to contact and shield noises emitted to the outside of the engine compartment. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、エンジン室の空気吸入口、又は、空気排出口に装着し、エンジン室内に流入する空気の流れを円滑に誘導し、吸音特性が互いに相違する低周波吸音材及び高周波吸音材により低周波及び高周波の騒音をそれぞれ吸音することができるようにした建設機械用ノイズサイレンサー(ｎｏｉｓｅｓｉｌｅｎｃｅｒ)に関する。   The present invention is attached to an air intake port or an air exhaust port of an engine room, smoothly induces the flow of air flowing into the engine room, and is reduced by a low frequency sound absorbing material and a high frequency sound absorbing material having different sound absorption characteristics. The present invention relates to a noise silencer for construction machinery that can absorb high-frequency and high-frequency noise.

さらに詳しくは、エンジン室から発生する騒音が外部に放射されることを最小限に抑えることができるように用いられるノイズサイレンサーを形成することにおいて、エンジン室の内方は、冷却空気の流れがスムーズに行われるように水平構造になっており、且つ、エンジン室の外方は、騒音が直接放射されないように傾斜構造になっていることによって、ノイズサイレンサーの機能を最適に発揮することができるようにした建設機械用ノイズサイレンサーに関する。   More specifically, in forming a noise silencer that can be used to minimize the noise generated from the engine compartment to the outside, the flow of cooling air is smooth inside the engine compartment. As shown in Fig. 4, the engine room has a horizontal structure, and the outside of the engine compartment is inclined so that noise is not directly emitted, so that the noise silencer can function optimally. It relates to the noise silencer for construction machinery.

そこで、冷却空気とは、冷却ファンの駆動により外部から空気吸入口を介してエンジン室内に流入し、ラジエータを冷却させた後、空気排出口を通じて排出されると共に、騒音を伴う空気のことをいう。   Therefore, the cooling air refers to air that flows into the engine compartment from the outside through the air intake port by driving the cooling fan, cools the radiator, and is then discharged through the air discharge port and also causes noise. .

通常、掘削機などのような様々な建設機械が工事現場で使われている。この場合、工事現場の周囲に発生する騒音は、深刻な環境問題となり、その規制が益々強化されつつある。ヨーロッパの騒音規制強化により低騒音化の技術が注目を集めているなかで、エンジン室内の騒音が外部に放射されるのを最小限に抑えることができるように、エンジン室に装着のサイドドア又はエンジンフードなどを、作業時には密閉させる場合が多かった。   Usually, various construction machines such as excavators are used at construction sites. In this case, the noise generated around the construction site becomes a serious environmental problem, and the regulations are being tightened more and more. In order to minimize the noise emitted from the engine compartment to the outside while the noise reduction technology is gaining attention due to the strengthening of European noise regulations, the side doors installed in the engine compartment or Engine hoods were often sealed during work.

図１に示したように、従来技術による建設機械用ノイズサイレンサー５はエンジン室２の吸入口３に装着されており、この際、吸入口３には、エンジン１及び冷却ファン６の駆動時、エンジン室２から発生する騒音を吸音、減衰させるように、騒音減衰部材４が等間隔に固定されている。   As shown in FIG. 1, a noise silencer 5 for a construction machine according to the prior art is attached to the suction port 3 of the engine room 2. At this time, the suction port 3 is connected to the engine 1 and the cooling fan 6. The noise attenuating members 4 are fixed at equal intervals so as to absorb and attenuate the noise generated from the engine compartment 2.

図面には示されていないが、ノイズサイレンサー５は、冷却ファン６の駆動により外部から空気吸入口３を介してエンジン室２に流入され、ラジエータ８を冷却させた冷却空気が排出されるための空気排出口７に設けられることも可能である。   Although not shown in the drawing, the noise silencer 5 is supplied to the engine chamber 2 from the outside through the air suction port 3 by driving of the cooling fan 6, and the cooling air for cooling the radiator 8 is discharged. It can also be provided at the air outlet 7.

図中、説明されていない符号９は、エンジン1からの排気ガスを大気中に排出させるマフラーであり、符号１０は、エンジン１に連結され、油圧アクチュエータ(油圧シリンダなど)に作動油を供給する油圧ポンプである。   In the figure, reference numeral 9 that is not explained is a muffler that exhausts exhaust gas from the engine 1 into the atmosphere, and reference numeral 10 is connected to the engine 1 and supplies hydraulic oil to a hydraulic actuator (such as a hydraulic cylinder). It is a hydraulic pump.

前述した騒音減衰部材４の断面形状が、‘Ｖ’字状からなり、左右対称して形成されることによって、エンジン１及び冷却ファン６の駆動時、エンジン室２から発生する騒音が、騒音減衰部材４に接触、衝突することによって、吸音・遮蔽し、減衰されるので、エンジン室２内の騒音をある程度低減させる効果を奏する。   The cross-sectional shape of the noise attenuating member 4 described above has a “V” shape and is formed symmetrically, so that noise generated from the engine compartment 2 is reduced when the engine 1 and the cooling fan 6 are driven. By contacting and colliding with the member 4, sound absorption / shielding and attenuation are performed, so that an effect of reducing noise in the engine compartment 2 to some extent is achieved.

しかし、前述した騒音減衰部材４は吸音材として、吸音特性が互いに相違した吸音材等のうち何れか一種の吸音材のみ、具体的には低周波吸音性能が高い吸音材と高周波吸音性能が高い吸音材のうち、何れか一種の吸音材のみを使用していた。そのため、エンジン室２から発生する低周波数及び高周波数領域からなる騒音を低減させるノイズサイレンサー５の騒音低減効果が劣化する問題点があった。   However, the noise attenuating member 4 described above is used as a sound absorbing material, and only one of the sound absorbing materials having different sound absorbing characteristics, specifically, a sound absorbing material having a high low frequency sound absorbing performance and a high frequency absorbing performance. Only one type of sound absorbing material was used among the sound absorbing materials. Therefore, there has been a problem that the noise reduction effect of the noise silencer 5 for reducing noises generated from the engine room 2 and composed of low frequency and high frequency regions deteriorates.

また、冷却ファン６の駆動時、外部からエンジン室２に流入する冷却空気の流れが、‘Ｖ’字形状の騒音減衰部材４に干渉することになるので、エンジン室２内の冷却性能が著しく低下する結果を招いた。   Further, when the cooling fan 6 is driven, the flow of the cooling air flowing into the engine chamber 2 from the outside interferes with the 'V'-shaped noise attenuating member 4, so that the cooling performance in the engine chamber 2 is remarkably increased. Incurred results.

本発明の実施例は、騒音減衰部材の形状、構造を最適化することによって、エンジン室から発生し、外部に放射される騒音を低減させることができ、且つ、冷却空気の円滑な流れを誘導することによって、冷却性能を維持することができるようにした建設機械用ノイズサイレンサーに係る。   The embodiment of the present invention can reduce the noise generated from the engine compartment and radiated to the outside by optimizing the shape and structure of the noise attenuating member, and induces a smooth flow of cooling air. Thus, the present invention relates to a noise silencer for construction machinery that can maintain cooling performance.

また、本発明の実施例は、騒音減衰部材に付着する吸音材として、吸音特性が互いに違う低周波吸音材と高周波吸音材により、エンジン室の低周波騒音及び高周波騒音を同時に低減させることによって、騒音減衰部材の機能を最適に発揮することができるようにした建設機械用ノイズサイレンサーに係る。   Further, according to the embodiment of the present invention, as a sound absorbing material attached to the noise attenuating member, a low frequency sound absorbing material and a high frequency sound absorbing material having different sound absorption characteristics are used to simultaneously reduce low frequency noise and high frequency noise in the engine compartment, The present invention relates to a noise silencer for construction machinery that can optimally exhibit the function of a noise attenuation member.

本発明の実施例による建設機械用ノイズサイレンサーは、
建設機械のエンジン室の空気吸入口及び空気排出口を介して放射される騒音を減らすノイズサイレンサーにおいて、
前記エンジン室の空気吸入口及び空気排出口のうち少なくとも何れか一方に装着されるフレームと、
冷却ファンの駆動によりエンジン室外部からエンジン室内部に流入する冷却空気が円滑に流動するように、エンジン室内側に水平状態に形成されている第１部材と、前記第１部材と一体形に形成され、前記エンジン室の外部に放射される騒音と接触することにより遮蔽させるように、エンジン室外側に所定角度で上向きの傾斜状態に形成されている第２部材とからなり、前記フレームに等間隔に固定される騒音減衰部材を包含する。 A noise silencer for construction machinery according to an embodiment of the present invention is:
In a noise silencer that reduces noise radiated through the air inlet and air outlet of the engine room of a construction machine,
A frame attached to at least one of an air inlet and an air outlet of the engine compartment;
A first member formed in a horizontal state inside the engine compartment so that the cooling air flowing into the engine compartment from the outside of the engine compartment by the driving of the cooling fan flows smoothly, and formed integrally with the first member And a second member formed in an upwardly inclined state at a predetermined angle so as to be shielded by contact with noise radiated to the outside of the engine chamber, and is equidistant from the frame. A noise attenuating member fixed to the housing.

望ましい実施例によれば、前述した第１部材に高周波音を主に吸音する高周波吸音材を装着し、前記第２部材に低周波音を主に吸音する低周波吸音材を装着する。   According to a preferred embodiment, a high-frequency sound absorbing material that mainly absorbs high-frequency sound is attached to the first member, and a low-frequency sound absorbing material that mainly absorbs low-frequency sound is attached to the second member.

前述した第１部材に低周波音を吸音する低周波吸音材を装着し、前記第２部材に高周波音を吸音する高周波吸音材を装着する。   A low frequency sound absorbing material that absorbs low frequency sound is attached to the first member, and a high frequency sound absorbing material that absorbs high frequency sound is attached to the second member.

エンジン室に流入する冷却空気との接触時、空気抵抗を減らすべく、第１部材の端部形状は、半円形の断面形状に形成されており、第２部材の端部形状は、長方形の断面形状に形成されている。   In order to reduce air resistance at the time of contact with the cooling air flowing into the engine compartment, the end shape of the first member is formed in a semicircular cross-sectional shape, and the end shape of the second member is a rectangular cross section. It is formed into a shape.

エンジン室に流入する冷却空気との接触時、空気抵抗を減らすべく、第１部材の端部形状は、三角形の断面形状に形成されており、前記第２部材の端部は、長方形の断面形状に形成されている。   In order to reduce air resistance at the time of contact with cooling air flowing into the engine compartment, the end shape of the first member is formed in a triangular cross-sectional shape, and the end portion of the second member is formed in a rectangular cross-sectional shape. Is formed.

エンジン室に流入する冷却空気との接触時、空気抵抗を減らすべく、第１部材の端部形状は、長方形の断面形状に形成されており、第２部材の端部形状は、半円形の断面形状に形成されている。   In order to reduce air resistance when in contact with the cooling air flowing into the engine compartment, the end shape of the first member is formed in a rectangular cross-sectional shape, and the end shape of the second member is a semicircular cross-section. It is formed into a shape.

エンジン室に流入する冷却空気との接触時、空気抵抗を減らすべく、第１部材の端部形状は、長方形の断面形状に形成されており、第２部材の端部形状は、三角形の断面形状に形成されている。   In order to reduce air resistance when in contact with the cooling air flowing into the engine compartment, the end shape of the first member is formed in a rectangular cross-sectional shape, and the end shape of the second member is a triangular cross-sectional shape. Is formed.

エンジン室に流入する冷却空気との接触時、空気抵抗を減らすべく、前記第１、２部材の端部形状は、いずれも半円形の断面形状に形成されている。   In order to reduce air resistance at the time of contact with the cooling air flowing into the engine compartment, the end shapes of the first and second members are both formed into a semicircular cross-sectional shape.

エンジン室に流入する冷却空気との接触時、空気抵抗を減らすべく、前記第１、２部材の端部形状は、いずれも長方形の断面形状に形成されている。   In order to reduce air resistance at the time of contact with the cooling air flowing into the engine compartment, the end shapes of the first and second members are both formed in a rectangular cross-sectional shape.

前述したように、本発明の実施例による建設機械用ノイズサイレンサーは、次のような効果を奏する。
ノイズサイレンサーを形成する騒音減衰部材の最適化された形状、構造により、エンジン室から発生し、外部に放射される騒音を低減させると共に、冷却空気の円滑な流れを誘導し、冷却性能を保持することによって、製品の信頼性を向上させることが可能となる。 As described above, the construction machine noise silencer according to the embodiment of the present invention has the following effects.
The optimized shape and structure of the noise attenuating member that forms the noise silencer reduces noise emitted from the engine compartment and radiated to the outside, and also induces a smooth flow of cooling air to maintain cooling performance. As a result, the reliability of the product can be improved.

また、ノイズサイレンサーに付着する吸音材として、吸音特性が互いに相違したエンジン室内に発生の低周波騒音及び高周波騒音を、低周波吸音材と高周波吸音材により低減させることによって、ノイズサイレンサーの機能を最適に発揮できるので、製品の競争力を向上させることができる。   In addition, as a sound absorbing material that adheres to the noise silencer, the low frequency noise and high frequency noise generated in the engine room with different sound absorption characteristics are reduced by the low frequency sound absorbing material and the high frequency sound absorbing material to optimize the function of the noise silencer. Can improve the competitiveness of the product.

従来技術によるノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer by a prior art. 本発明の一実施例による建設機械用ノイズサイレンサーの概略を示した斜視図である。It is the perspective view which showed the outline of the noise silencer for construction machines by one Example of this invention. 本発明の一実施例による建設機械用ノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer for construction machines by one example of the present invention. 本発明の他の実施例による建設機械用ノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer for construction machines by the other Example of this invention. 本発明のさらに他の実施例による建設機械用ノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer for construction machines by further another Example of this invention. 本発明のさらに他の実施例による建設機械用ノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer for construction machines by further another Example of this invention. 本発明のさらに他の実施例による建設機械用ノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer for construction machines by further another Example of this invention. 本発明のさらに他の実施例による建設機械用ノイズサイレンサーの使用状態図である。It is a use state figure of the noise silencer for construction machines by further another Example of this invention.

以下、本発明の望ましい実施例を添付図面に基づいて詳述するが、これは、本発明が属する技術分野において通常の知識を有する者が発明を容易に実施得る程度に詳しく説明するためのものであって、これに本発明の技術的な思想及び範疇が限定されることを意味するのではない。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to explain in detail to such an extent that those skilled in the art to which the present invention can easily practice the invention. However, this does not mean that the technical idea and category of the present invention are limited.

図２ないし図８に示した本発明の実施例による建設機械用ノイズサイレンサーは、
建設機械のエンジン室の空気吸入口又は空気排出口に装着されるノイズサイレンサーにおいて、
エンジン室１１の所定位置(一例で、冷却ファン２０の駆動時、外部からエンジン室１０内に外部空気が流入されるための空気吸入口１８側に設けられる)に装着されるフレーム１２と、
冷却ファン２０の駆動により外部から空気吸入口１８を通じてエンジン室１１内に流入する冷却空気が円滑に流動するように、エンジン室１１内側に水平状態に形成されている第１部材１３と、第１部材１３と一体形に形成され、エンジン室１０の外部に放射される騒音(エンジン２１の駆動による高周波数騒音及び冷却ファン２０の駆動により発生する低周波数騒音)と接触することにより騒音が遮蔽させられるように、エンジン１１の外側に所定角度で上向きの傾斜状態に形成されている第２部材１４とからなり、フレーム１２に上下方向に等間隔に固定されている騒音減衰部材１５を包含する。 The noise silencer for construction machine according to the embodiment of the present invention shown in FIGS.
In the noise silencer attached to the air inlet or air outlet of the engine room of the construction machine,
A frame 12 attached to a predetermined position of the engine chamber 11 (provided on the side of the air inlet 18 for external air flowing into the engine chamber 10 from the outside when the cooling fan 20 is driven).
A first member 13 formed horizontally in the engine chamber 11 so that the cooling air flowing into the engine chamber 11 from the outside through the air inlet 18 by the driving of the cooling fan 20 flows smoothly; Formed integrally with the member 13, the noise is shielded by contact with noise radiated to the outside of the engine compartment 10 (high frequency noise generated by driving the engine 21 and low frequency noise generated by driving the cooling fan 20). As shown in the figure, a noise attenuating member 15 comprising a second member 14 formed in an upwardly inclined state at a predetermined angle on the outside of the engine 11 is fixed to the frame 12 at equal intervals in the vertical direction.

この際、第１部材１３に高周波音を主に吸音する高周波吸音材１６(一例で、ポリウレタン材、ポリプロフィレン材、ガラス繊維材、フェルト材、発泡樹脂材、塩化ビニル樹脂材などが用いられる)が装着され、且つ、第２部材１４に低周波音を主に吸音する低周波吸音材１７(一例で、ミネラルなどのような無機質材を使用することができる)が装着される。   At this time, the first member 13 is a high-frequency sound absorbing material 16 that mainly absorbs high-frequency sound (for example, a polyurethane material, a polypropylene material, a glass fiber material, a felt material, a foamed resin material, a vinyl chloride resin material, or the like is used). Is mounted, and the second member 14 is mounted with a low-frequency sound absorbing material 17 that mainly absorbs low-frequency sound (in one example, an inorganic material such as mineral can be used).

エンジン室１１に流入する冷却空気との接触時、空気抵抗を減らすように、前記第１、２部材１３、１４の端部形状は、長方形の断面形状にそれぞれ形成されている。   The end shapes of the first and second members 13 and 14 are each formed in a rectangular cross-sectional shape so as to reduce the air resistance when contacting with the cooling air flowing into the engine chamber 11.

図面には図示されていないが、第１部材１３に低周波音を吸音する低周波吸音材(図示せず)が装着され、第２部材１４に高周波音を吸音する高周波吸音材(図示せず)が装着される。   Although not shown in the drawing, a low-frequency sound-absorbing material (not shown) that absorbs low-frequency sound is attached to the first member 13, and a high-frequency sound-absorbing material (not shown) that absorbs high-frequency sound is attached to the second member 14. ) Is installed.

図中、説明されていない符号２３は、エンジン１からの排気ガスを大気中に排出させるマフラー、符号２４は、エンジン２１に連結されており、油圧アクチュエータ(油圧シリンダなど)に作動油を供給する油圧ポンプである。   In the figure, reference numeral 23 not described is a muffler that exhausts exhaust gas from the engine 1 to the atmosphere, and reference numeral 24 is connected to the engine 21 and supplies hydraulic oil to a hydraulic actuator (such as a hydraulic cylinder). It is a hydraulic pump.

以下では、本発明の実施例による建設機械用ノイズサイレンサーの構成について、添付図面を参照して詳述する。
図３に示したように、掘削機などのような建設機械の場合、エンジン２１及び冷却ファン２０が駆動すると、冷却空気が空気吸入口１８を通じてエンジン室１１内に流入し、ラジエータ２２を冷やしたのちに、空気排出口１９を介して外部に排出されることになる。 Below, the structure of the noise silencer for construction machines by the Example of this invention is explained in full detail with reference to an accompanying drawing.
As shown in FIG. 3, in the case of a construction machine such as an excavator, when the engine 21 and the cooling fan 20 are driven, cooling air flows into the engine chamber 11 through the air inlet 18 and cools the radiator 22. Later, the air is discharged to the outside through the air discharge port 19.

また、エンジン２１及び冷却ファン２０が駆動すると、エンジン室１１から騒音が発生し、冷却空気と共に外部に放射される。この時に発生された騒音は、エンジン室１１の空気吸入口１８に装着のノイズサイレンサーにより遮蔽、減衰させられる。   Further, when the engine 21 and the cooling fan 20 are driven, noise is generated from the engine compartment 11 and is radiated to the outside together with the cooling air. The noise generated at this time is shielded and attenuated by a noise silencer attached to the air inlet 18 of the engine compartment 11.

即ち、エンジン２１及び冷却ファン２０の駆動によりエンジン室１１から発生する騒音は、エンジン２１の駆動により発生する高周波騒音と、冷却ファン２０の駆動により発生する低周波騒音とから分けられ、騒音減衰部材１５を形成する第１部材１３と第２部材１４により吸音、遮蔽させられ、減殺させられることができる。   That is, the noise generated from the engine compartment 11 by driving the engine 21 and the cooling fan 20 is divided into high-frequency noise generated by driving the engine 21 and low-frequency noise generated by driving the cooling fan 20, and is a noise attenuating member. The first member 13 and the second member 14 that form 15 can be sound-absorbed, shielded, and reduced.

この際、騒音減衰部材１５の第１部材１３は、エンジン室１１の内側に水平を保持するように形成されており、且つ、騒音減衰部材１５の第２部材１４は、エンジン室１１の外側に上向きに傾斜するように形成されている。そのことから、冷却ファン２０の駆動により騒音減衰部材１５を通過してエンジン室１１に流入される冷却空気は、干渉を受けることなく、円滑に誘導されることができる。   At this time, the first member 13 of the noise attenuation member 15 is formed so as to be kept horizontal inside the engine chamber 11, and the second member 14 of the noise attenuation member 15 is disposed outside the engine chamber 11. It is formed so as to incline upward. Therefore, the cooling air that flows through the noise attenuating member 15 and flows into the engine compartment 11 by driving the cooling fan 20 can be smoothly guided without interference.

上述した如く、騒音減衰部材１５の第１部材１３は、エンジン室１１の内側に水平を保持するように形成されており、騒音減衰部材１５の第２部材１４は、エンジン室１１の外側に上向きの傾斜状態に形成されていることによって、エンジン２１及び冷却ファン２０の駆動によりエンジン室１１から発生する高周波騒音及び低周波騒音を、第１部材１３に装着の高周波吸音材１６及び第２部材１４に装着の低周波吸音材１７により吸音、減衰させることになる。   As described above, the first member 13 of the noise attenuating member 15 is formed so as to be kept horizontal inside the engine chamber 11, and the second member 14 of the noise attenuating member 15 faces upward outside the engine chamber 11. The high-frequency sound absorbing material 16 and the second member 14 attached to the first member 13 are configured so that the high-frequency noise and low-frequency noise generated from the engine chamber 11 by driving the engine 21 and the cooling fan 20 are formed. The sound is absorbed and attenuated by the low-frequency sound-absorbing material 17 attached to the head.

前述したように、本発明の実施例による建設機械用ノイズサイレンサーによれば、冷却ファン２０の駆動時、空気吸入口１８を介してエンジン室１１内に流入する冷却空気の流れが騒音減衰部材１５に干渉しないので、冷却空気が円滑に流入される。そのことから、冷却空気の流入量が増大し、エンジン２１又はラジエータ２２を効果的に冷却させることができるので、冷却効率を向上することができる。   As described above, according to the noise silencer for construction machine according to the embodiment of the present invention, when the cooling fan 20 is driven, the flow of the cooling air flowing into the engine chamber 11 through the air suction port 18 is the noise attenuation member 15. Therefore, the cooling air flows smoothly. As a result, the inflow amount of cooling air is increased and the engine 21 or the radiator 22 can be effectively cooled, so that the cooling efficiency can be improved.

また、エンジン２１及び冷却ファン２０の駆動により、エンジン室１１内に発生する高周波騒音及び低周波騒音を、第１部材１３の高周波吸音材１６及び第２部材１４の低周波吸音材１７により吸音、遮蔽させることによって、ノイズサイレンサーの機能を最適化することができる。即ち、高周波及び低周波の騒音が、第１部材１３の高周波吸音材１６及び第２部材１４の低周波吸音材１７を通過するとき、音圧エネルギーから摩擦エネルギーに変わるため、高周波及び低周波騒音は、吸収及び遮蔽、つまり減殺させられることができる。   Further, high frequency noise and low frequency noise generated in the engine compartment 11 by driving the engine 21 and the cooling fan 20 are absorbed by the high frequency sound absorbing material 16 of the first member 13 and the low frequency sound absorbing material 17 of the second member 14. By shielding, the function of the noise silencer can be optimized. That is, when high-frequency and low-frequency noise passes through the high-frequency sound-absorbing material 16 of the first member 13 and the low-frequency sound-absorbing material 17 of the second member 14, the sound pressure energy changes to frictional energy. Can be absorbed and shielded, ie attenuated.

図４に示したように、本発明の他の実施例による建設機械用ノイズサイレンサーが、前述した空気吸入口１８を介してエンジン室１１に流入する冷却空気との接触時、空気抵抗を減らすように、第１部材１３の端部形状は、長方形の断面形状に形成されており、且つ、前記第２部材１４の端部形状は、半円形の断面形状に形成されている。   As shown in FIG. 4, the noise silencer for construction machine according to another embodiment of the present invention reduces the air resistance when contacting with the cooling air flowing into the engine compartment 11 through the air suction port 18 described above. In addition, the end shape of the first member 13 is formed in a rectangular cross-sectional shape, and the end shape of the second member 14 is formed in a semicircular cross-sectional shape.

この際、前述した冷却ファン２０の駆動により外部から空気吸入口１８を通じてエンジン室１１に冷却空気が流入するとき、騒音減衰部材１５との接触による空気抵抗を最小限に抑制するように、第２部材１４の端部形状を半円形の断面に形成した構成を除いては、本発明の一実施例(図３に示す)に記載の構成と実質的に同一であるため、これらに対する詳しい説明は省略し、同じ構成要素には同じ図面符号を付する。   At this time, when the cooling air flows from the outside into the engine compartment 11 through the air suction port 18 by driving the cooling fan 20 described above, the second air resistance is suppressed so as to suppress the air resistance due to contact with the noise attenuating member 15 to a minimum. Except for the configuration in which the end shape of the member 14 is formed in a semicircular cross section, the configuration is substantially the same as the configuration described in one embodiment of the present invention (shown in FIG. 3). Omitted, the same constituent elements are denoted by the same reference numerals.

図５に示したように、本発明のさらに他の実施例による建設機械用ノイズサイレンサーが、前述した空気吸入口１８を通じてエンジン室１１に流入する冷却空気との接蝕時、空気抵抗を減らすように、第１部材１３の端部形状は、長方形の断面形状に形成されており、且つ、第２部材１４の端部形状は、三角形の断面形状に形成されている。   As shown in FIG. 5, the noise silencer for construction machine according to still another embodiment of the present invention reduces air resistance when in contact with the cooling air flowing into the engine compartment 11 through the air inlet 18 described above. Moreover, the end shape of the first member 13 is formed in a rectangular cross-sectional shape, and the end shape of the second member 14 is formed in a triangular cross-sectional shape.

この際、前述した冷却ファン２０の駆動により外部から空気吸入口１８を介してエンジン室１１に冷却空気が流入するとき、騒音減衰部材１５との接触による空気抵抗を最小限に抑制するように、第２部材１４の端部形状を、三角形の断面形状に形成した構成を除いては、本発明の一実施例に記載の構成と実質的に同一であるので、これらに対する詳細な説明は省略し、同じ構成要素には同じ図面符号を付する。   At this time, when cooling air flows into the engine chamber 11 from the outside through the air suction port 18 by driving the cooling fan 20 described above, air resistance due to contact with the noise attenuation member 15 is minimized. Except for the configuration in which the end shape of the second member 14 is formed in a triangular cross-sectional shape, the configuration is substantially the same as the configuration described in the embodiment of the present invention, and thus detailed description thereof will be omitted. The same components are denoted by the same reference numerals.

図６に図示の本発明のさらに他の実施例による建設機械用ノイズサイレンサーが、空気吸入口１８を通じてエンジン室１１に流入する冷却空気との接触時、空気抵抗を減らすように、第１部材１３の端部形状は、半円形の断面形状に形成されており、且つ、第２部材１４の端部形状は、長方形の断面形状に形成されている。   When the construction machine noise silencer according to still another embodiment of the present invention shown in FIG. 6 is in contact with the cooling air flowing into the engine compartment 11 through the air inlet 18, the first member 13 is reduced. The end shape of the second member 14 is formed in a semicircular cross-sectional shape, and the end shape of the second member 14 is formed in a rectangular cross-sectional shape.

この際、前述した冷却ファン２０の駆動により外部から空気吸入口１８を通じてエンジン室１１に冷却空気が流入されるとき、騒音減衰部材１５との接触による空気抵抗を最小限に抑制するように、第１部材１３の端部形状を、半円形の断面形状に形成した構成を除いては、本発明の一実施例に記載の構成と実質的に同一であるので、これらに対する詳細な説明は省略し、同じ構成要素には同じ図面符号を付する。   At this time, when cooling air is introduced from the outside into the engine compartment 11 through the air intake port 18 by driving the cooling fan 20 described above, the air resistance due to contact with the noise attenuating member 15 is minimized. Except for the configuration in which the end portion of one member 13 is formed in a semicircular cross-sectional shape, the configuration is substantially the same as the configuration described in the embodiment of the present invention, and thus detailed description thereof will be omitted. The same components are denoted by the same reference numerals.

図７に図示の本発明のさらに他の実施例による建設機械用ノイズサイレンサーが、空気吸入口１８を通じてエンジン室１１に流入する冷却空気との接触時、空気抵抗を減らすように、第１部材１３の端部形状は、三角形の断面形状に形成されており、且つ、第２部材１４の端部形状は、長方形の断面形状にそれぞれ形成されている。   When the noise silencer for a construction machine according to still another embodiment of the present invention shown in FIG. 7 is in contact with the cooling air flowing into the engine compartment 11 through the air inlet 18, the first member 13 is reduced. The end shape of the second member 14 is formed in a triangular cross-sectional shape, and the end shape of the second member 14 is formed in a rectangular cross-sectional shape.

この際、前述した冷却ファン２０の駆動により外部から空気吸入口１８を通じてエンジン室１１に冷却空気が流入されるとき、騒音減衰部材１５との接触による空気抵抗を最小限に抑制するように、第１部材１３の端部形状を、三角形の断面形状に形成した構成を除いては、本発明の一実施例に記載の構成と実質的に同一であるので、これらに対する詳細な説明は省略し、同じ構成要素には同じ図面符号を付する。   At this time, when cooling air is introduced from the outside into the engine compartment 11 through the air intake port 18 by driving the cooling fan 20 described above, the air resistance due to contact with the noise attenuating member 15 is minimized. Except for the configuration in which the end portion shape of the one member 13 is formed in a triangular cross-sectional shape, the configuration is substantially the same as the configuration described in the embodiment of the present invention. The same components are denoted by the same reference numerals.

図８に図示の本発明のさらに他の実施例による建設機械用ノイズサイレンサーが、空気吸入口１８を通じてエンジン室１１に流入する冷却空気との接触時、空気の抵抗を減らすように、第１、２部材１３、１４の端部形状は、半円形の断面形状にそれぞれ形成されている。   A noise silencer for a construction machine according to still another embodiment of the present invention shown in FIG. 8 is configured to reduce the air resistance when contacting the cooling air flowing into the engine compartment 11 through the air suction port 18. The end portions of the two members 13 and 14 are each formed in a semicircular cross-sectional shape.

この際、前述した冷却ファン２０の駆動により外部から空気吸入口１８を介してエンジン室１１に冷却空気が流入されるとき、騒音減衰部材１５との接触による空気抵抗を最小限に抑制するように、第１、２部材１３、１４の端部形状を半円形の断面形状にそれぞれ形成した構成を除いては、本発明の一実施例に記載の構成と実質的に同一であるので、これらに対する詳細な説明は省略し、同じ構成要素には同じ図面符号を付する。   At this time, when cooling air flows into the engine compartment 11 from the outside through the air suction port 18 by driving the cooling fan 20 described above, air resistance due to contact with the noise attenuation member 15 is minimized. The first and second members 13 and 14 are substantially the same as the configuration described in the embodiment of the present invention except for the configuration in which the end portions of the first and second members 13 and 14 are formed in a semicircular cross-sectional shape. Detailed descriptions are omitted, and the same components are denoted by the same reference numerals.

１１ エンジン室
１２ フレーム
１３ 第１部材
１４ 第２部材
１５ 騒音減衰部材
１６ 高周波吸音材
１７ 低周波吸音材
１８ 空気吸入口
１９ 空気排出口
２０ 冷却ファン
２１ エンジン
２２ ラジエータ 11 Engine compartment 12 Frame
Reference Signs List 13 First member 14 Second member 15 Noise attenuating member 16 High frequency sound absorbing material 17 Low frequency sound absorbing material 18 Air intake port 19 Air exhaust port 20 Cooling fan 21 Engine 22 Radiator

Claims (9)

建設機械のエンジン室の空気吸入口及び空気排出口を介して放射される騒音を減らすノイズサイレンサーにおいて、
前記エンジン室の空気吸入口及び空気排出口のうち少なくとも何れか一方に装着されるフレーム、及び、
冷却ファンの駆動により、エンジン室外部からエンジン室内部に流入する冷却空気が円滑に流動するように、エンジン室内側に水平状態に形成されている第１部材と、前記第１部材と一体形に形成され、前記エンジン室の外部に放射される騒音と接触することにより遮蔽させるように、エンジン室外側に所定角度で上向きの傾斜状態に形成されている第２部材とからなり、前記フレームに等間隔に固定される騒音減衰部材を包含することを特徴とする建設機械用ノイズサイレンサー。 In a noise silencer that reduces noise radiated through the air inlet and air outlet of the engine room of a construction machine,
A frame attached to at least one of an air inlet and an air outlet of the engine chamber; and
A first member formed in a horizontal state on the engine compartment side so as to smoothly flow cooling air flowing into the engine compartment from the outside of the engine compartment by driving the cooling fan, and integrated with the first member And a second member formed in an upwardly inclined state at a predetermined angle on the outside of the engine room so as to be shielded by contact with noise radiated to the outside of the engine room. A noise silencer for construction machinery, comprising a noise attenuating member fixed at intervals. 前記第１部材に高周波音を吸音する高周波吸音材が装着されており、前記第２部材に低周波音を吸音する低周波吸音材が装着されていることを特徴とする請求項１に記載の建設機械用ノイズサイレンサー。   The high-frequency sound-absorbing material that absorbs high-frequency sound is attached to the first member, and the low-frequency sound-absorbing material that absorbs low-frequency sound is attached to the second member. Noise silencer for construction machinery. 前記第１部材に低周波音を吸音する低周波吸音材が装着されており、前記第２部材に高周波音を吸音する高周波吸音材が装着されていることを特徴とする請求項１に記載の建設機械用ノイズサイレンサー。   The low-frequency sound-absorbing material that absorbs low-frequency sound is attached to the first member, and the high-frequency sound-absorbing material that absorbs high-frequency sound is attached to the second member. Noise silencer for construction machinery. 前記エンジン室に流入する冷却空気との接触時、空気抵抗を減らすように、前記第１部材の端部形状は、半円形の断面形状に形成されており、前記第２部材の端部形状は、長方形の断面形状に形成されていることを特徴とする請求項１ないし３のうち何れか一項に記載の建設機械用ノイズサイレンサー。   The end shape of the first member is formed in a semicircular cross-sectional shape so as to reduce air resistance when contacting with the cooling air flowing into the engine compartment, and the end shape of the second member is The noise silencer for construction machinery according to any one of claims 1 to 3, wherein the noise silencer is formed in a rectangular cross-sectional shape. 前記エンジン室に流入する冷却空気との接触時、空気抵抗を減らすように、前記第１部材の端部形状は、三角形の断面形状に形成されており、前記第２部材の端部形状は、長方形の断面形状に形成されていることを特徴とする請求項１ないし３のうち何れか一項に記載の建設機械用ノイズサイレンサー。   At the time of contact with the cooling air flowing into the engine compartment, the end shape of the first member is formed in a triangular cross-sectional shape so as to reduce air resistance, and the end shape of the second member is The noise silencer for a construction machine according to any one of claims 1 to 3, wherein the noise silencer is formed in a rectangular cross-sectional shape. 前記エンジン室に流入する冷却空気との接触時、空気抵抗を減らすように、前記第１部材の端部形状は、長方形の断面形状に形成されており、前記第２部材の端部形状は、半円形の断面形状に形成されていることを特徴とする請求項１ないし３のうち何れか一項に記載の建設機械用ノイズサイレンサー。   At the time of contact with the cooling air flowing into the engine compartment, the end shape of the first member is formed in a rectangular cross-sectional shape so as to reduce air resistance, and the end shape of the second member is The noise silencer for a construction machine according to any one of claims 1 to 3, wherein the noise silencer is formed in a semicircular cross-sectional shape. 前記エンジン室に流入する冷却空気との接触時、空気抵抗を減らすように、前記第１部材の端部形状は、長方形の断面形状に形成されており、前記第２部材の端部形状は、三角形の断面形状に形成されていることを特徴とする請求項１ないし３のうち何れか一項に記載の建設機械用ノイズサイレンサー。   At the time of contact with the cooling air flowing into the engine compartment, the end shape of the first member is formed in a rectangular cross-sectional shape so as to reduce air resistance, and the end shape of the second member is The noise silencer for construction machinery according to any one of claims 1 to 3, wherein the noise silencer is formed in a triangular cross-sectional shape. 前記エンジン室に流入する冷却空気との接触時、空気抵抗を減らすように、前記第１、２部材の端部形状は、半円形の断面形状にそれぞれ形成されていることを特徴とする請求項１ないし３のうち何れか一項に記載の建設機械用ノイズサイレンサー。   The end shapes of the first and second members are each formed in a semicircular cross-sectional shape so as to reduce air resistance when contacting with cooling air flowing into the engine compartment. The noise silencer for construction machinery according to any one of 1 to 3. 前記エンジン室に流入する冷却空気との接触時、空気抵抗を減らすように、 前記第１、２部材の端部形状は、長方形の断面形状にそれぞれ形成されていることを特徴とする請求項１ないし３のうち何れか一項に記載の建設機械用ノイズサイレンサー。   The end portions of the first and second members are each formed in a rectangular cross-sectional shape so as to reduce air resistance when contacting with cooling air flowing into the engine compartment. The noise silencer for construction machines as described in any one of thru | or 3.
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