silencer

Abstract

The invention discloses a silencer comprising a shell. The shell is provided with a first chamber, a second chamber and a third chamber inside, and further provided with an exhaust-gas inlet pipe, an inner breather pipe and an exhaust-gas outlet pipe. The first chamber and the second chamber are partitioned through a first partition plate, the second chamber and the third chamber are partitioned through a second partition plate, and through holes are reserved in the second partition plate; volume of the first chamber is larger than that of the second and third chambers; the exhaust-gas inlet pipe is arranged in the first chamber, and the outer end of the exhaust-gas inlet pipe penetrates the shell; and one end of the inner breather pipe is fixed on the first partition plate and extends into the first chamber, while the other end of the same is fixed on the second partition plate and extends into the third chamber; and the exhaust-gas outlet pipe is arranged in the third chamber, one end of the exhaust-gas pipe penetrates the shell, while the other end of the same penetrates out of the second partition plate into the second chamber. Since heat dissipation of the first chamber is concentratedly performed by a motor fan, affection on product appearance brought by shell discoloration caused by continuous high temperature of the silencer is thus prevented.

Description

technical field [0001] The present invention relates to a muffler, in particular to a muffler for passing through an engine block. Background technique [0002] At present, the well-known and public mufflers have three chambers: the first, the second and the third, such as figure 1 As shown in the figure, each chamber is separated by an inner cavity partition, the muffler bracket is welded on the outer wall of the shell at the junction of the second and third chambers, all waste passage pipes are straight pipes, and both ends of the waste air inlet pipe are They are respectively supported on the muffler housing and the inner cavity partition between the first chamber and the second chamber, and the inner cavity partition between the first chamber and the second chamber is also provided with a short tube of the exhaust gas passage, The two inner cavity partitions are lightly penetrated with two exhaust gas inner pipes, and the exhaust gas outlet pipe also penetrates through ...

AI Technical Summary

Problems solved by technology

The exhaust gas first enters the second chamber through the exhaust gas inlet pipe, then turns back to the first chamber through the short exhaust gas passage pipe, and then enters the third chamber through an exhaust gas inner passage, and finally, the exhaust gas passes through another exhaust gas internal passage pipe, the connecting bend exhaust pipe and the exhaust gas outlet pipe, because the exhaust gas flows through a long route and repeatedly passes through the second chamber, the high-temperature exhaust gas cannot be diffused well, and a high-temperature accumulation area is easily formed in the second chamber, making the second chamber The temperature of the outer wall of the shell is very high, which also makes the temperature of the muffler bracket too high. The engine block is installed above the muffler, and the muffler bracket is connected to the rear cover of the engine. Because the surface temperature of the muffler is too high, its radiation heat is also high, which will affect the entire engine block. The safe use of the muffler poses a serious threat, and safety accidents are prone to occur, and the muffler is prone to premature aging and scrapping

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