A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To facilitate the reduction in air blow noise generated from an air passing through a blowing pipe.SOLUTION: A silencer 40 connected to an air blow pipe 30 of an air blow work machine 10 is provided with a silencer pipe 41 connected to the air blow pipe 30 and having a sound absorption material 42 arranged on the inner peripheral surface thereof, and a reflecting protrusion 43 provided to protrude inward from the inner peripheral surface of the silencer pipe 41 to reflect an air passing through the central portion in a radial direction of the silencer 41 so as to pass around the sound absorption material 42.SELECTED DRAWING: Figure 2
【課題】送風管を通過する空気から生じる送風騒音の低減化を図る。【解決手段】送風作業機１０の送風管３０に接続される消音器４０は、送風管３０に接続されて内周面に吸音材４２が配設された消音管４１と、消音管４１の内周面から内側に突出して設けられて、消音管４１の径方向の中央部を通過する空気を吸音材４２の周囲を通過させるように反射させる反射突部４３を設けた。【選択図】図２
To facilitate the reduction in air blow noise generated from an air passing through a blowing pipe.SOLUTION: A silencer 40 connected to an air blow pipe 30 of an air blow work machine 10 is provided with a silencer pipe 41 connected to the air blow pipe 30 and having a sound absorption material 42 arranged on the inner peripheral surface thereof, and a reflecting protrusion 43 provided to protrude inward from the inner peripheral surface of the silencer pipe 41 to reflect an air passing through the central portion in a radial direction of the silencer 41 so as to pass around the sound absorption material 42.SELECTED DRAWING: Figure 2
【課題】送風管を通過する空気から生じる送風騒音の低減化を図る。【解決手段】送風作業機１０の送風管３０に接続される消音器４０は、送風管３０に接続されて内周面に吸音材４２が配設された消音管４１と、消音管４１の内周面から内側に突出して設けられて、消音管４１の径方向の中央部を通過する空気を吸音材４２の周囲を通過させるように反射させる反射突部４３を設けた。【選択図】図２
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