本技术文章为读者提供了在干船坞期间进行的活动概述,明确地集中在船尾机械设备周围;船尾,螺旋桨,方向舵和相关的辅助设备。

在该实施例中考虑了一种典型的油润滑船管装置。

识别分别是类的项目列表urveyor may wish to include as part of their stern area survey.

Classification Society requirements

During a dry dock, a classification society surveyor will be on-site and will carry out the survey of the equipment as broadly described below:

尾轴调查

螺旋桨和船尾管组件是对接​​调查的独立调查。调查通常包括螺旋桨和尾轴的完全撤回。它可以包括以下考试,如适用:

  • 螺旋桨的目视检查
  • 毂和刀片的紧固件和泄漏紧密性将在可控俯仰螺旋桨上进行
  • Dismantling of the CPP may not be carried out unless considered necessary by the surveyor
  • 磨损测量和记录后轴承
  • 船尾船管密封泄漏测试和录音
  • 螺旋桨nut and threaded end of the tail shaft
  • 螺旋桨cone, key and keyway
  • 在尾轴的圆柱形部分的后端使用有效的裂缝检测方法以及尾部或全部尾轴锥度
  • 在螺旋桨拟合是通过固体法兰耦合的情况下,在尾轴的法兰圆角区域上进行裂缝检测
  • Tail shaft in the way of stern tube bearings
  • 船尾轴承的间隙测量。

在重新装配中,注意到以下内容:

  • 螺旋桨push up distance and hydraulic force
  • Wear down measurement and recording
  • Aft stern tube seal leakage performance
  • 改装任何绳索护罩/切割机。
Rudder survey

The survey can be carried out with the rudder attached but may be removed anyway as part of the tail shaft survey. The examination could include the following, as applicable:

  • Visual inspection of the rudder
  • 针刺的目视检查
  • If considered a necessity by the surveyor, the rudder is lifted or inspection plates removed to allow access for assessment of the pintle
  • 视觉检查舵股
  • 船尾框架的目视检查
  • 舵轴承中的确定和记录间隙
  • 压力测试参加验船师认为舵。

Dry Dock Activities

各种尾轴和舵布置在不同尺寸和类型的血管上存在。以下部分描述了典型的干码头程序的活动。

尾轴干码头程序
  • Check the stern tube for oil leakage
  • 切断绳子护罩并通过捕鱼网或电缆/绳索注意任何污垢
  • Measure the wear down, ensuring a mark is made on the liner to identify where the wear down measurement was taken. Ensure the relative position between the gauge and seal housing is marked so that the gauge is tightened to the same extent on the next measurement
  • 排水船尾油
  • 部分拆卸后封印章
  • 拆下螺旋桨盖,螺旋桨螺母,然后螺旋桨
  • 检查刀片表面以进行侵蚀,蚀,冲击损坏和弯曲。检查应专注于符合课程社会要求的地区
  • 如果认为必要的话,螺旋桨应通过合适的方法进行修复
  • 拍摄螺旋桨的测量并与以前的记录进行比较
  • 对于可控的音高螺旋桨,请检查叶片的叶片运动和零间距设置。检查刀片和载体上的紧固件的液压油泄漏和安全性
  • 如果需要尾轴移除,则拆卸AFT密封,向前密封和连接到中间轴
  • Withdraw the tail shaft
  • Perform visual inspection and NDT (as required) on the tail shaft, stern tube and stern tube bearings
  • 检查螺旋桨凸台,尾轴支架和船尾框架上的焊接连接处的骨折
  • Refit the tail shaft and re-couple at forward end according to procedure
  • Refit the propellor
  • According to the procedure, after a correct and recorded propellor push–up (fitting) has concluded, tighten the hydraulic propellor nut. Ensure that the hydraulic hose connection bores on the hub and nut are suitably sealed and fitted with their plugs. The plugs should be locked in position
  • 配合垫圈的螺旋桨盖,确保间隙内的空隙空间充满了油脂或牛油。在固定螺栓凹槽中完成水泥,以确保光滑的光洁度。螺旋桨抛光是常见的
  • Secure the aft seal housing and liner, ensuring the bolt heads are locked by a suitable method locking two bolts at a time.
  • 在密封制造商的建议之后,根据需要进行调整,衬垫和轴和衬里和密封壳之间的同心度之间的同心度。还为前向密封填写这一点
  • 完成制造商的指示后的前向和后尾密封和测试功能和泄漏的构建
  • 确保衬垫与以前标记的位置相同,磨损读数和记录。当衬里中可能存在可能影响测量结果中的衬里中可能存在一些偏心度,衬里必须处于相同的位置
  • Before attaching the wear down gauge ensure the hole is clean and the gauge is tightened to the same level as the previous measurement, by aligning the previously made marks
  • 将绳索防护装置牢固地焊接到位,并与制造商的说明系列连接绳索切割器
  • If the vessel is fitted with and Impressed Current Cathodic Protection system (ICCP), ensure the epoxy shields around the anodes are done. Conduct an insulation test
  • In addition to the ICCP system, zinc anodes are fitted around the stern area. They should be checked for wastage and renewed as necessary. It is advised not to fit anodes around the stern boss directly in front of the propellor so as not to create turbulence in the water flow to the propellor
舵干码头程序
  • 当码头水最初泵出来时,检查水是否从舵外出来,从而识别舵是否已被突破
  • If the rudder appears breached internal parts of the rudder may be corroded. Open the bottom plug and drain the rudder
  • 压力测试舵根据规格
  • 依赖于腐蚀水平/点蚀,可能需要厚度测量
  • 锌阳极安装在舵叶上。应检查它们是否必要时进行浪费并更新
  • 测量所有轴承的间隙。纵向(向前/船尾)和横向检查(端口/右舷)。通常发现叉子轴承比颈部轴承更快。如果需要,请注意磨损量并考虑轴承更换。
  • 针线和颈部位置的标准间隙为1 - 2mm
  • 检查方向舵跳隙。跳跃止动件和舵之间的平均间隙是2-3毫米,并使用厚度计测量。如果间隙很大,则可以假设舵掉下来。这必须考虑到制造商在转向齿轮机械中的限制
  • At the rudder carrier, check the bolt torques connecting the carrier to the deck and check for cracks in the deck adjoining fastening positions
  • Check the true position of the rudder when compared to the rudder angle indicator to check for any differences resulting from bending or deformation
  • The rudder blade, rudder horn and rudder stock must be checked for deformations. Excessive deformation may manifest itself as excessive clearances
  • 检查舵角上的焊接连接处的骨折。
  • 检查舵和舵喇叭电镀中的腐蚀和侵蚀水平,关注焊接
  • The rudder may be removed for remedial repairs or sometimes to enable removal of the propellor
  • If the vessel is fitted with and Impressed Current Cathodic Protection system (ICCP), ensure the epoxy shields around the anodes are done. Conduct an insulation test
  • In addition to the ICCP system, zinc anodes are fitted on the rudder. They should be checked for wastage and renewed as necessary.

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