轴承字面上保持世界转向与需要它们的任何两个部件一起运行。船只对大多数船舶运行传统的轴的推进系统以及含有白色金属轴承的油润滑船管的大多数船只。
As a plain rather than a rolling element, or ball bearing – good alignment, adequate cooling and lubrication is essential to maintain a lifetime of performance.
对运营和安全 - 白色金属轴承是分类社会调查的特定感兴趣的领域。

白色金属轴承for Vessels

由于历史上和现在的锡基合金的轴承的运行表面,白色金属轴承表明,由于轴承的运行表面,呈着颜色。轴承的背衬元件是由钢制成的较硬的壳,其使用具有称为Babbiting的熔融金属的旋转模塑方法沉积在其上的更沉积的锡型衬里材料。静止背衬材料为轴承提供了结构支撑,而柔软的衬里提供了最佳的摩擦和磨损性能。

设计,安装和维护正确 - 白色金属轴承可以持续船舶的寿命 - 也许只要25年。虽然与它们的厚度相比,轴承的磨损表面相对较薄,但是当正确操作时,轴被支撑在全流体膜上,这防止除了静止时的表面之外的表面之间的任何接触。

轴承将安装在船只船尾管内,沿着独立基座的机械空间内的轴线,称为线轴轴承。

表现

Achieving good performance and life from the bearings is dependent on several factors which include:

  • Correct design and modelling of the shaft line – bearings are built with slope and offset as required to maximise shaft support and load on the bearing itself.
  • 准确安装和对准轴承 - 由于弯曲或船体失真而导致的所需配置不同的安装可能导致过载。
  • Adequate system cooling and filtration – cleanliness of the lubricating oil is essential to maintain its load bearing and anti-friction properties. Debris and heat will contribute to accelerated wear. Some systems rely on thermal convection alone for circulation, others include pressurised oil feeds.
  • Seal maintenance – any seawater entering the bearings will cause corrosion and increased surface contact. In extreme cases this can overheat the bearings causing the shaft to seize resulting in damage to the bearings and shaft. This will usually result in emergency dry dock, bearing and possibly shaft replacement

Supporting Systems

A vessel fitted with white metal bearings will include several supporting systems which would be included within an on-board survey to assess system condition.

Typically, this would comprise:

  • Oil pumping, filtration and cooling system
  • System seals
  • Thermocouple probes providing live operating temperatures
  • Bearing wear down measurements

常见问题

由于系统未对准或润滑不足,因此在白色金属轴承中看到最常见的问题。一些降低的性能和故障的情况也与开关相连,以替代,乳化和EAL油,其中不同的油性质导致系统过载。

用于泄漏的船尾管的全部过常见的修复是利用较厚或乳化的油来管理入射的海水或输出油。在未考虑这些产品的导热性降低的情况下,可以产生加速磨损或轴承失效。

轴承调查

在轴承调查中,ATZ将在计划更详细的检查之前从船只中收集所有可用的操作信息。这包括:

  • 板载监控数据和绘图审查
  • Pumping and cooling system inspection
  • 检查轴承间隙(可在可能的抛离/码头中)
  • Checking lubrication log and estimating any leakage rates
  • Draw conclusions on system condition and remaining life
  • Support required parts, service or upgrade proposal

A full and detailed survey of the white metal bearings and liners could usually only be completed in dry dock with partial or full removal of the tail shaft and pedestal covers.

We would always recommend a full bearing inspection with replacement as required should the shaft be withdrawn and replacement of all seals.


常见问题解答

润滑系统油中有碎片,但我们已经安装了额外的过滤以除去它。这是一个问题吗?

是的。
油系统内的碎屑是组件中的任何一个都失败,或分解或高磨损。可以移除每个基座的顶部以执行轴承的基本目视检查。值得分析颗粒以建立被沉积的材料,但需要制备线轴轴承变化或尾轴取出。
线轴轴承壳可以重新金属并更换服务,但大多数船尾轴承都需要干码头和轴移除以改变。

We want to change to an EAL oil – is this a straight swap?

No – each part of the system needs to be considered for compatibility first. A system flush may be required, and some seals and other equipment might need to be changed for a compatible material.
AtZ can review your system and advise any required steps for upgrade.

Our vessel is newly constructed and while all appears in order, we have some increased system bearing temperatures in heavy weather. What could be the cause?

轴承温度直接与负载相关,并且在这种情况下,温度迅速上升,这通常表示过载。我们已经看到许多案例,其中设备已经安装了具有较差的对准算法,用于船舶的加载参数,这可能只在负载条件下变得显而易见。泄漏的后密封也可能导致水入进入可能会影响导致温度尖峰的润滑剂性能。
An urgent review of the system together with an alignment check would be the best course of action to identify root cause – and could be offered as a complete solution from AtZ.

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