Complex silencer for diesel generator unit

Abstract

The invention relates to a silencer applied to the field of silencing and noise reduction for internal combustion engines, in particular to a complex silencer for a diesel generator unit. The complex silencer for a diesel generator unit comprises an intake tube, a dissipative silencing structure connected with the intake tube in series, a resistant silencing structure arranged inside the dissipative silencing structure, and a gas outlet tube connected with the dissipative silencing structure in series, wherein three expansion chambers are formed by a resonance perforated plate, a first-level resistant baffle and a second-level resistant baffle together, and are arranged in the direction from the intake tube to the gas outlet tube in the order of the first expansion chamber, the second expansion chamber and the third expansion chamber. Because the dissipative silencing structure and the resistant silencing structure are connected in series for use, the range of the silencing frequency band is broader; and making use of different expansion ratios, the passing frequency of exhaust flow is increased, the peak value of silencing of the silencer can be large, and the silencing capacity can be increased. The complex silencer for a diesel generator unit has the advantages of being broad in silencing frequency band, small in volume, simple in structure, low in transmission loss and light in integral weight. Meanwhile, the effect of improving the anticorrosion function is achieved by using metal tubes and metal plates.

Description

technical field

[0001] The invention relates to a muffler used in the field of noise reduction for internal combustion engines, in particular to a composite muffler for a diesel generator set, which can be used in a noise reduction system of a high-performance silent diesel generator set. Background technique

[0002] Smoke exhaust mufflers can be divided into resistive mufflers, resistive mufflers, and impedance compound mufflers according to their principles. The resistant muffler uses the sudden change in the section of the pipeline or the side-connected resonant cavity, so that certain frequency sound waves propagating along the pipeline will reflect and interfere at the sudden change in the section, so as to achieve the purpose of noise reduction. The resistant muffler has good middle and low frequency noise reduction characteristics. Resistive mufflers can be regarded as energy-absorbing mufflers, which use sound waves to pass through porous sound-absorbing materials,...

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