"帕罗斯·勇士"轮船体改装生产设计概述

文章通过对"帕罗斯.勇士"轮成功改装的设计总结,简要介绍了油轮单壳改双壳,船体改装生产设计的工艺过程,并对工艺中可能出现的问题进行了讨论。就船厂而言,如何充分利用工厂自身条件合理制定出既切实可行,又能为船东和船级社所接受的改装设计,有其特别的实际意义。     

重庆单轨车辆测速电机漏油故障分析及改进措施

重庆单轨在运营一段时间后,个别列车转向架齿轮箱测速电机大齿轮定位轴的油封密封处出现漏油情况,齿轮箱外表面也存在外观不良的现象,对车辆正常运营造成很大影响。针对测速电机漏油故障问题,通过对相关零部件的配合表面质量、基本尺寸、形位公差、组装工艺、加工工艺、质量管控等诸多因素的调查分析故障原因,并给出解决测速电机漏油故障的改进措施及合理化建议。     

盾构施工有毒或可燃气体"不明"来源的探究

通过采集盾构机大轴承中的润滑油、滚刀轴承中的润滑油、盾尾密封油脂、聚氨酯及岩心样品进行试验,说明油脂会裂解为有毒、可燃气体.盾构机密封舱中的所谓不明气体,实际上是在复合地层盾构施工过程中油脂的裂解产物.     

Citizen Participation and Collaborative Environmental Management in the Marine Oil Trade of Coastal Alaska

This study compares the contributions to policy change made by two Regional Citizens’ Advisory Councils that participate in the environmental management of the marine oil trade in coastal regions of Alaska. Both councils are remarkably well-funded and long-enduring examples of citizen participation in environmental policy. This study finds that both councils have applied their substantial funding resources to make significant contributions to policy change (policy contributions) in the marine oil trade of coastal Alaska. This study also finds that both councils have greatly magnified their policy contributions through collaborative efforts with many other organizations active in the marine oil trade of Alaska. Therefore, the overall policy contributions of the councils result from the joint application of council resources and collaborative efforts.     

制备工艺对活性炭吸附船舶含油污水容量的影响

为开发适用于船舶含油污水处理的吸附剂,研究了以蔗糖为原料、H3PO4为活化剂制备活性炭。采用单因素优化法分析了浸渍比(H3PO4质量：蔗糖质量)、活化温度、活化时间、升温速率对活性炭吸附乳化油容量的影响。结果表明：在浸渍比2.5、活化温度550℃、活化时间2h、升温速率15℃/min的条件下制备的活性炭对乳化油吸附量最大,达到57.6mg/g。在吸附量对比实验中发现：较大比表面积的商用活性炭对乳化油吸附量明显低于较小比表面积的自制活性炭,可见活性炭比表面积并非决定吸附性能的主要因素。通过孔隙结构表征可知：活性炭试样比表面积达到1095m2/g,总孔容积1.72cm3/g,中孔容积1.20 cm3/g,平均孔径6.3nm,该活性炭中孔发达适合用于含油污水处理。     

绞吸挖泥船绞刀传动系统性能优化研究

结合工程案例,对绞吸挖泥船绞刀传动系统浮动油封损坏原因作了分析,并提出了改进措施,对提高设备使用寿命及环境保护具有积极意义。     

Modeling Coastal and Marine Environmental Risks in Belize: the Marine Integrated Decision Analysis System (MIDAS)

The livelihood of coastal communities is directly linked to the health of intertidal and marine ecosystems. Coastal zones and marine areas are rapidly changing and highly vulnerable to impacts from climate change, accelerating human development, and over-fishing. Quality of life and the benefits of coastal development can be greatly enhanced, and costs minimized, by projecting and comparing alternative policy outcomes before management decisions are made. This article describes the Marine Integrated Decision Analysis System (MIDAS), an interactive decision support tool designed to assist the users and managers of Belize's system of marine management areas (MMAs) in understanding the interactions among various ecological, socioeconomic, and governance conditions in a spatially explicit manner. MIDAS can simulate and visualize the likely effects of alternative management strategies and therefore provides an important tool for evaluating potential scenarios. We developed two MIDAS modules to address specific threats in Belize –spatial risk resulting from mangrove deforestation in coastal areas and the potential effect of an oil spill off the coast of Belize. Workshops conducted in Belize indicate that diverse user groups such as fishers, tourism operators, and public environmental agencies can successfully utilize MIDAS to understand MMA outcomes, and environmental risks.     

成品油船货油装卸系统仿真研究

针对成品油船货油装卸系统自动化、智能化研究中的关键技术问题,以45000dwt成品油船为研究背景,进行货油装卸系统的仿真研究.建立了基于计算机局域网的系统整体模型、系统故障检测模型、货油泵阀的数学模型、货油舱的数学模型及船体浮态模型,并用Visual Basic 6.0编制了货油装卸系统仿真软件.该软件具有系统自检、故障分析、故障报警及防止误操作等功能,实现了装油、卸油作业方案操作的自动化仿真.     

宁波港大榭岛30万t级油码头平面布置

在油码头建设中,往往要求接卸油品的大型码头可以兼靠较小船型用于油品出运。以本工程为例,码头要求停靠的船舶最大为44万t,最小为1 000 t级。结合本工程的平面布置特点,介绍当设计船型种类较多、大小差别较大时,在平面布置设计中需要重点考虑的问题。     

柴油机喷油泵泵腔油压波形的测定和分析

本文通过测定柱塞根部的纵向应变,求得泵腔油压波形,并对其时域和频域特性进行了详细分析。建议采用最高油压、前期压力上升率和泵油持续角等参数来表征泵腔油压波形的基本特性。指出国产Ⅱ号泵的油压波形在大供油量时呈半正弦脉冲波特性,在小供油量时呈三角形脉冲波特性。