Sound arrester applied to engine pedestal

Abstract

The invention provides a sound arrester of an engine pedestal, being applied to the technical field of the engine pedestal. The sound arrester of the engine pedestal is in a plate-like structure. The sound arrester comprises a steel plate layer (1) and a butyl damping rubber layer (2), wherein the steel plate layer (1) and the butyl damping rubber layer (2) of the sound arrester are connected together in an adhesive mode; and an air exhaust pipe (10) of an engine on the engine pipe is in a structure that the air exhaust pipe penetrates through the sound arrester. In the sound arrester applied to the engine pedestal, the engine pedestal can isolate the engine noise in the process of regulating the exhaust noise of the engine pedestal, so that the engine noise and the exhaust noise can be separated so as to better carry out the noise regulation design work of the sound arrester. With the adoption of the sound arrester provided by the invention, an anechoic chamber can be saved so as to lower the manufacturing cost of the entire sound arrester.

Description

technical field [0001] The invention belongs to the technical field of engine test stands, and more specifically relates to a sound insulation device applied to engine test stands. Background technique [0002] In the whole vehicle NVH development process, in order to shorten the development cycle of the whole vehicle, the development of the exhaust system tends to be more synchronized with the development of the whole vehicle. However, in the early stage of development, when there is no vehicle resources, exhaust manufacturers use more in the engine bench, but in the tuning process of the engine bench, the impact of the engine's own noise on the exhaust noise directly affects the The real acquisition of exhaust noise will affect the development of exhaust noise. On the other hand, since the development effect of exhaust noise is finally evaluated by the exhaust noise of the whole vehicle or the hub, the exhaust noise of the engine bench In the development stage, it is gene...

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Problems solved by technology

In order to achieve this purpose, in order to achieve sound tuning in the engine stand, the exhaust system manufacturers usually make the engine into a movable form, and at the same time build an anechoic chamber, leaving a hole between the engine and the anechoic chamber, and the exhaust system Pass through this hole and enter the anechoic chamber, and carry out the exhaust noise test in the anechoic chamber, but with this method, the engine is made into a movable form, which is often not conducive to experimentation, and it is even unusable for high-power engines. On the other hand, it is necessary to build a Anechoic chamber, the cost of anechoic chamber is very expensive, usually several million,

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