“育鲲”轮主机涡轮增压器结构介绍及新技术应用可行性分析.docxVIP

大连海事大学毕 业 论 文二〇一五年六月“育鲲”轮主机涡轮增压器结构介绍及新技术应用可行性分析专 业 班 级： 轮机工程学院内容摘要摘要：“育鲲”轮为大连海事大学教学实习船。船舶建造时间为2008年4月，投入服务时间较短，加之船舶设施先进，管理维护恰当，主机涡轮增压器在运行中从未出现影响船舶安全的故障。但是，“育鲲”轮作为教学实习船，其运行中有着主机起停频繁，主机处于停机状态时间较多，运行所处海洋环境迥异等特点。随着服务时间的加长，主机涡轮增压器所面临的故障风险会越来越大。这要求轮机员在运行、维护和管理时密切关注参数变化，严格按照涡轮增压器说明书，厂方要求及船舶要求进行操作。本文根据MAN BW公司6S35MC型主机说明书及操作手册，NA40/S型涡轮增压器说明书，船用、车用涡轮增压器相关学术论文及期刊等资料，介绍了“育鲲”轮NA40/S型涡轮增压器各组成部分（或系统）的材料、结构、制造工艺、气体流动、工作原理、效率和运行维护操作管理注意要点。另外本文还结合实际情况，分别以文章完成期间，“育鲲”轮五月份在黄海北部海域，泰国湾海域涡轮增压器效率的变化情况，估计涡轮增压器的运行状态。涡轮增压器在实际运行中会遇到低速、低工况下性能不佳，偏离设定工况时流道内气体扰动，喘振等问题。为解决此类问题，国内、外近年来发展出很多新的理论、技术和结构。另外，涡轮增压器最早由船用推广至车用，但现在很多在车用涡轮增压器中成功应用的新技术同样启发着船用涡轮增压器。本文择取其中一部分，对其进行简要介绍，并对其在“育鲲”轮上应用的可行性进行分析。这给其它教学实习船的建造提供了一定参考。关键词：船用柴油机；涡轮增压器；NA40/S结构；新技术ABSTRACT：YUKUN is the training ship’s name of Dalian Maritime University. Being built in April, 2008, the vessel is not long to be put in service. Furthermore , YUKUN is well equipped and properly operated thus the turbocharger of the main engine has never met with serious failure. As a training ship, however, YUKUN has its special characters. Firstly, the main engine starts up and finishes regularly. Secondly, the ship usually stays in port and the main engine is at stop condition in most occasions. What’s more, the ship can be sailing in definitely different seas including tropical seas and frigid seas. Thus as the service life extends, the failure risk of the main engine turbocharger can be increased, which demands marine engineers for a keen eye on the turbocharger parameter’s changes during operation, maintenance and management, and operates according to the requirements on the specifications of the manufacturer, shipyard and ship owner.This paper introduces the main engine turbocharger every part’s ( or system’s ) structure, material, manufacture technique, gas flow feature, working principle, efficiency and tips in management according to the specifications and the instruction book of both MAN BW 6S35MC main engine and NA40/S turbocharger and some other re