REDUCE THE NOISE INTENSITY FOR THE LOCAL TRACTOR (ANTAR71) BY USING REVERSE FLOW SILENCER

	REDUCE THE NOISE INTENSITY FOR THE LOCAL TRACTOR (ANTAR71) BY USING REVERSE FLOW SILENCER
AL-TAQANI
Article 1, Volume 23, Issue 2, 2010, Pages 244-251
Abstract
A silencer of a tractor ANTAR 71 reverse flow was manufactured in a local workshop by changing the structure and dimensions of the original silencer , lengthening the pipe connected to the exhaust manifold and changing the silencer from the vertical to the horizontal position .The results showed that there was a difference between the original and the manufactured one .the noise intensity of the manufactured silencer was 80 dB for three engine speeds 1000 , 1500 , 2000 rpm without load ,while the noise intensity in the original silencer was 87.3 dB for the same previous speeds without load .This manufactured silencer was tested practically with three speeds in farm in AL-Mahmudiya to perform grading operations in a newly plowed field .The noise intensity of the manufactured silencer was again less than the original one as showed below 1-The original silencer gave a 88.6 dB noise intensity for three speeds . 2-The manufactured silencer gave a 81.2 dB noise intensity for three speeds . A according to what has been mentioned above , we recommended to use the manufactured model of silencer in the tractor ANTAR 71to improve the driver´s productivity and to maintain the environmental standards .

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