Research On The Performance And Optimal Design Of The Mine Car Intake System

Among the high-intensity noise radiated by the construction machinery, theengine intake noise is an important noise source. Therefore, controlling the intakenoise is very important to reduce the overall noise of construction machinery. Inthis paper, the noise of engine intake systems generation mechanism and controlmeasures are introduced, the noise of the control procession and the commoncharacteristics of mufflers that are often used in the intake systems also aredescribed. Then, the noise property of the construction machinery intake system isanalyzed by FEM and test, and the flow field is also simulated.In this paper, the noise test results of a construction machinery intake systemis analyzed, finite element model of the intake system is built, and the sound fieldand flow field of the intake system are analyzed by simulation, and get the noisetransmission loss of the intake system and internal air flow flied result. Accordingto the test results, a simplified intake system acoustic model is built byone-dimensional acoustic theory, and improved case is given after simulation andanalysis. After practical testing and validation, the cabin noise is reduced, and thecustomer’s demand is met, also some ideas and theoretical guidance can be used asreferences on the control of construction machinery noise.In addition, Some research about the simple expansion muffler has been madein this paper，which provide not only the theoretical basis for the optimizationdesign of the muffler, but also certain reference value for selecting structure typesof expansion muffler during the project.