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介绍长江海事巡逻艇的使用情况、存在的问题,着重对公务船艇采用变档齿轮箱的必要性和可行性进行了探讨,并提出了改造设想。 相似文献
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正2017年,面对不利形势,广东凯力船艇股份有限公司"自强不息,励志创展",专注于豪华游船、游艇、公务船艇、清洁能源船等各类船舶及海洋工程装备的设计建造,致力于发展成为中国水上旅游装备的领航者和世界一流船艇设计建造企业,通过不懈努力和辛勤付出,克服种种困难,取得了良好的成绩。公司主营业务实现了政府公务船艇、游船等市场领域的重大突破,在转型升级上迈出了成功一步。 相似文献
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从船艇主机的效能分析体系入手 ,运用ADC效能分析法 ,阐述了效能分析在船艇主机上的应用 ,并通过实例演示具体算法 相似文献
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我国玻璃钢船艇经过20多年的发展成绩显著,产品种类日益丰富、建造工艺有了很大的提高,但玻璃钢船艇设计至今仍存在一些误区,现实中由于设计不当而造成的船舶状态不佳、阻力偏大、结构易损等情况时有发生,因此对于特定功能的船艇在选型和设计时要慎之又慎,而对于一些基本的玻璃钢船艇特征的认识更应该引起重视。 相似文献
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正江龙船艇科技股份有限公司主要从事旅游休闲船艇和公务执法船艇的研发、设计、制造、销售和售后服务,为客户提供从应用设计、产品制造到维修保养等全方位的个性化服务解决方案,被认定为广东省级企业技术中心、广东省工程技术研究中心、广东省级工业设计中心。2017年,江龙船艇依托持续的技术创新、优异的产品性能和齐全的产品线结构,实现了继续稳步发展,并成功登陆A股创业板。 相似文献
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介绍了我国港口资源的整合现状,指出港口整合可以提升港口的形象和地位,也为区域经济和城市的发展注入强大的动力。最后指出在港口资源整合中要避免的几个问题。 相似文献
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广州集装箱码头的轮胎式场桥小车制动器使用10多年后,出现了许多问题,故进行了改造.分析了轮胎式集装箱龙门起重机小车制动器的主要故障现象,提出了改造方案,并加以实施. 相似文献
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本文对现有的选定球面轴承的三种工程方法进行了分析比较.引入了“合力系数”,并给出了合力方向上投影面积的精确解. 相似文献
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分析柴油机故障中常见的机体裂纹故障原因,认为由于设计缺陷和管理及操作不当,易造成船舶柴油机缸体上的裂纹多发生在气缸套凸肩处。如不及时处理这些裂纹和故障,就会造成缸套的裂纹直至出现缸套漏水等严重后果,针对NANTAIQUEEN轮柴油机对该类型故障的检修提出具体措施。 相似文献
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The hydrophysical and hydrochemical structure of the Sea of Azov, with developed bottom anoxia, was studied during the RV “Akvanavt” cruise from July 31 to August 03, 2001. The anoxic zone with a thickness from 0.5 to 4 m above the bottom was found in all deep regions of the Sea. Concentrations of hydrochemical parameters were similar to the pronounced anoxic conditions (about 90 mmol m− 3 of hydrogen sulfide, 17 mmol m− 3 of ammonia, 6 mmol m− 3 of phosphate, 7 mmol m− 3 of total manganese). The hydrophysical structure was characterized by the uniform distribution of temperature in the upper 6–7 m mixed layer (UML). Below this a thin (0.4–0.8 m) thermocline layer was observed, just above the anoxic waters. Formation of this phenomenon was connected with that summer weather conditions. Intensive rains led to increased influx of river waters in June. That resulted in large input of allochtonous organic matter (OM) and inorganic nutrients; the latter were consumed on the additional autochthonous organic matter production. In July the weather was characterized by a significant rise in the daily averaged air temperature and large oscillations of temperature during the day. In this period a wind of constant direction was absent, but wind bursts were observed. The completed analyses showed that the formation of such a structure could be connected with the following factors: (i) positive growth trends of the daily averaged temperature and the daily oscillations of temperature, (ii) presence of wind bursts. The joint action of these factors resulted in the formation of the UML. The amplitude of wind bursts determined the depth of UML, and the value of trend determined the value of the temperature change in the thermocline. An initial presence of bottom halocline (caused by the Black Sea water influx to the bottom of the Sea of Azov) prevented the heating of the bottom layer and therefore led to an increase of vertical gradient of temperature in the thermocline. The spatial distribution of the turbulent exchange coefficient confirmed the existence of a “stagnation” area located above the anoxia zone, which is also, apparently, the reason for its occurrence. 相似文献
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