M10-25门机回转支承机构的故障诊断及维修技巧

M 10 - 2 5门机回转机构下支承轴承出现故障时 ,使门机回转时产生振动、异响和回转吃力等现象。水平滚轮与轨道的间隙过大、下支承壳体缺油或进水等是产生故障的主要原因 ,使用专用工具———振销器有助于顺利完成下支承的更换工作     

堆取料机回转支承密封方式改进

日照港矿石堆场6台DQ7500/3500·47型堆取料机回转支承曾经发生多次故障,故障现象有滚柱保持架损坏、轨道擦伤等,轨道擦伤严重时,回转支承无法修复,造成较大的经济损失。该故障检修难度大,需用3个600t的千斤顶将上部回转体悬     

回转支承多源性故障波致振动模型及其应用研究

讨论了回转支承中多源性故障的诊断。从点状激励下应力波的传播特性出发,通过对波形转换的分析,推导并证明了多源性故障的诊断模型和判别特征;经过对实际结构的测定和实例实用,说明本文提出的模型和结论正确有效。     

提高大型装卸机械回转支承运行的可靠性

<正> 大型回转支承是港口大型装卸机械主要的部件之一。装卸机械的回转机构借助回转支承传递垂直力、水平力和倾覆力矩,并通过齿圈实现装卸机械的回转。它采用的是封闭结构,与其相联的上部回转机构往往重达几百吨。一旦发生停机故障,一般要把几百吨的上部结构提升一定高度,才能维修或更换大型回转支承,维修时间长、费用高、停机间接损失大,甚至带来安全事故。     

斗轮取料机回转轴承故障分析与消除对策

斗轮取料机实际工作中,回转轴承经常出现如负荷变大、冲击异常、滚道磨损和噪音增大等故障.本文从回转轴承安装方式、回转轴承的受力情况和回转轴承润滑维护3个方面对回转轴承支承常见故障的原因进行了分析,提出了提高斗轮取料机回转轴承使用精度和寿命的对策.     

斗轮堆取料机回转支承分体检查及旋转换向工艺

结合实际介绍斗轮机回转支承检查清洗及旋转换向的经验,为防范斗轮机重大故障风险、制订维修策略、建立重大故障应急预案提供依据和参考。     

港口大型设备回转支承设计选用与使用维护管理

分析港口大型设备回转支承的设计选用、大型设备的制造排装和设备使用中对回转支承的维护要求以及维修策略,对大型设备回转支承的全寿命管理有一定的参考价值。     

船用回转支承疲劳寿命试验机设计

随着回转支承被大量应用于船舶机械中,针对回转支承的疲劳寿命研究显得越来越重要,但是目前的回转支承寿命理论不足以满足实际生产实践的要求,因此进行回转支承疲劳寿命试验成了最直接有效的方法。本文针对船用回转支承的受载特点,设计出了一种全新的针对船用特种回转支承的疲劳寿命试验机,试验机可以满足不同型号回转支承在不同轴向力和倾覆力矩下的实验要求,并通过检测系统实时监测实验回转支承的状态。     

国内首台自主研发的回转支承性能检测试验台投入使用

1月20日，国内首台自主研发的数字式回转支承综合性能检测试验台在马鞍山方圆回转支承股份有限公司（以下简称方圆支承）正式投入使用。     

台车式回转支承在装船机上的应用

大型回转型装船机上部回转部分的重量较大,且在工作和非工作状态下,臂架处于不同的位置,重心位置都不同,因此回转以上部分重心变化很大.采用台车式支承代替回转轴承,可以大大提高其承载能力,而且这种支承方式维修方便.下面以12000 t/h装船机为例,从设计、选型、维修等方面对台车式回转支承进行分析.     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.