Low-noise damping exhaust silencer

An exhaust muffler, low-noise technology, applied in muffler devices, machines/engines, engine components, etc., can solve the problems of environmental pollution, high noise, and large vibration of the muffler, and achieves reduced noise pollution, simple and compact structure, and increased manufacturing. cost effect

Inactive Publication Date: 2014-05-07
TIANJIN QIXING PRECISION MACHINERY
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AI-Extracted Technical Summary

Problems solved by technology

However, in the prior art, the control of noise is not successful, causing surrounding residents to suffer from noise disturbance, affecting the surrounding environment, and causing serious environmental pollution.
[0003] In order to solve the above problems, the existing engine exhaust system adopts a conventional muffler structure. Although it has a...
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Method used

Also comprise the overflow pipe 10 and fixed plate 9 that are positioned at expansion chamber 4, described fixed plate 9 is positioned at mobile dividing plate 5 front sides and is provided with through gas passage 8, and described exhaust pipe 16 passes forward Through the fixed partition 9, the inlet pipe 13 passes through the fixed partition 9 and the movable partition 5 successively; Cooperating with the movement, the exhaust pipe 16 and the intake pipe 13 are jointly supported by the fixed partition 9, and can be used to support the return spring, so that the internal structure of the entire muffler is stable, and has a damping effect on the discharged gas, further reducing noise The function; the overflow ...
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Abstract

The invention discloses a low-noise damping exhaust silencer. The low-noise damping exhaust silencer comprises a housing, an intake pipe, an expansion chamber and an exhaust pipe, and also a series of damping structures such as a movable separator with penetrating resonance through hole, wherein the front end face of the housing is in smooth transition with the sidewalls of the housing. The low-noise damping exhaust silencer is provided with a damping plate-movable separator combined structure, so that when the engine operates, the size of the intake space can be changed through two-way expansion of the damping plate and the movable separator when the exhaust pipe of the silencer exhausts gas, and simultaneously, the front end face of the housing is in smooth transition with the sidewalls of the housing so that adverse early noise caused by gas shock can be avoided, and moreover, the running noise of the engine can be further reduced and the vibration of the silencer can be reduced, and noise pollution caused by the operation of the engine is greatly reduced. The low-noise damping exhaust silencer is simple and compact without increase in the manufacturing cost.

Application Domain

Technology Topic

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  • Low-noise damping exhaust silencer

Examples

  • Experimental program(1)

Example Embodiment

[0016] The attached drawing is a schematic structural diagram of the present invention. As shown in the figure, the low-noise damping exhaust muffler of this embodiment includes a housing 11, an intake pipe 13, an expansion cavity 4, and an exhaust pipe 16, and the expansion cavity 4 A damping plate 2 that is slidably fitted with the wall of the expansion chamber 4 in the longitudinal direction is arranged opposite to the outlet of the intake pipe 13. The damping plate 2 is located on the side opposite to the outlet of the intake pipe 13 and is provided with a damping spring 3; the exhaust pipe 16 passes through the damping plate 2 and its sliding fit;
[0017] It also includes a movable partition 5 with a penetrating resonance through hole 6, the inlet pipe 13 and the exhaust pipe 16 respectively pass through the movable partition 5, the outlet of the inlet pipe 13 and the inlet of the exhaust pipe 16. On both sides of the row of movable partitions 5, the movable partitions 5 are matched with the intake pipe 13 and the exhaust pipe 16 in a movable manner along the axial direction. The movable partitions 5 are located on the inlet side of the exhaust pipe 16 and set back spring;
[0018] The air inlet of the exhaust pipe 16 faces the front end surface of the casing 11, and a smooth transition between the front end surface of the casing and the side wall of the casing 11 forms a smooth transition structure 11a.
[0019] There are at least three damping springs 3 distributed in such a way that the damping plate 2 receives a balanced force; one of the damping springs is sheathed on the exhaust pipe 16; in this embodiment, the three damping springs are distributed in a triangular shape, so that the damping plate can be balanced.
[0020] It also includes an overflow tube 10 located in the expansion cavity 4 and a fixed plate 9. The fixed plate 9 is located on the front side of the movable partition 5 and is provided with a through air through hole 8. The exhaust pipe 16 forwards through the fixed partition. Plate 9, the air inlet pipe 13 passes through the fixed partition 9 and the movable partition 5 in turn; the overflow pipe 10 passes through the fixed partition 9 and the movable partition 5 in turn, and is movable in axial direction with the movable partition 5 , The exhaust pipe 16 and the intake pipe 13 are jointly supported by the fixed partition 9 and can be used to support the return spring, so that the internal structure of the entire muffler is stable, and the exhaust gas has a damping effect to further reduce the noise; The overflow pipe can buffer the pressure of the high-pressure exhaust gas, make the high-pressure gas overflow quickly, and help eliminate noise.
[0021] The return spring is located between the fixed partition 9 and the movable partition 5, and the number of return springs corresponds to the exhaust pipe 16, the intake pipe 13, and the overflow pipe 10 and is sleeved in the exhaust pipe 16, the intake pipe 13 one by one. And the overflow pipe 10, as shown in the figure, the return spring 14 sleeved on the exhaust pipe 16, the return spring 12 sleeved on the intake pipe 13, and the return spring 7 sleeved on the overflow pipe 10; The installation structure of the position spring is stable and runs smoothly.
[0022] In order to clearly illustrate the present invention, the above embodiments are only a specific and clear description of the present invention, and cannot limit the scope of protection of the present invention. Therefore, obvious modifications made to the present invention by those of ordinary skill in the art fall into this Within the scope of the claims of the invention.
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Description & Claims & Application Information

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