Kobelco Compact Seal CX-500
油润滑尾管密封（艉部和艏部）
The Kobelco Compact Seal CX-500 keeps sea water out of the oil-lubricated stern tube and keeps oil in. The aft seal has Viton lip sealing rings (No.1–No.3) running on a chrome steel liner fixed to the propeller boss; the forward seal has rings No.4 and No.5 with its own oil tank. The finished plan has assembly drawings with parts lists for both seals, the distance ring, tank arrangements, repair rules (liner skimming limits, alignment after refitting) and a daily/weekly inspection table linking each abnormal reading to its likely cause and the action at sea.
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保养规程
Seal renewal in dry dock
- With propeller and shaft withdrawn, detach the seal housings from the hull. 第 29 页
- Replace sealing rings; skim the chrome liners if worn, within the D − X limit, otherwise renew the liner. 第 29 页
- Use stainless steel bolts for the aft seal when reassembling. 第 29 页
- Refit and check alignment with dial indicators: eccentricity 0.2 mm, squareness 0.1 mm per diameter (670 types and below). 第 29 页
保养周期
| 项目 | 周期 | 操作 | 说明书 |
|---|---|---|---|
| Stern tube oil temperature | daily | Over 60 °C: check white metal in strainer, cooler, thermometer; slow down if bearing damage | 第 31 页 |
| Stern tube oil pressure and tank level | daily | Sudden drop: look for leaks at forward seal or oil outside the ship | 第 31 页 |
| Aft seal drain | weekly | Check for emulsified oil / seawater and drain it | 第 31 页 |
| Forward seal tank level and temperature | daily | Sudden rise or drop indicates No.4/No.5 ring damage; refill or recover oil | 第 31 页 |
| Aft seal tank level | daily | Sudden rise with emulsion means seawater past rings No.1/No.2 | 第 31 页 |
故障及处理方法
Stern tube oil above 60 °CBearing damage, cooler or thermometer faultSudden drop of stern tube oil levelLeak from aft or forward sealEmulsified oil or seawater in drainDamaged No.1/No.2 rings or trapped foreign matterFresh water in drainLeak from aft peak tankForward seal tank level changesNo.4 or No.5 ring damage
技术参数
| Seal size | CX-500 (shaft liner 500 mm class) | 第 1 页 |
|---|---|---|
| Sealing rings | Viton, aft and forward | 第 2 页 |
| Liner skimming limit | D − X: X = 3.4 mm for size 500 (e.g. 600 type: 3.7 mm) | 第 29 页 |
| Alignment after refitting (≤670 types) | eccentricity 0.2 mm/dia, squareness 0.1 mm/dia | 第 29 页 |
| Stern tube oil temperature alarm | over 60 °C | 第 31 页 |
| Oil pressure margin for seawater ingress | raise 0.3–0.5 kgf/cm² above normal | 第 31 页 |
来源：制造商说明书《EM-35 KOBELCO COMPACT SEAL-STERNTUBE SEALING》，共 47 页。页码以原文为准。作业前请核对船上的说明书。
本页为自动翻译。零件号、代码和页码与原文一致。