無銷推進器壓入安裝之規範許可範圍

Rules Required Limits to Fit a Keyless Propeller on Tail Shaft

左鹿年(Lu-Nien Tso)

《船舶科技》 16期 (1995/10) Pp. 4-18

https://doi.org/10.30037/MT.199510.0001

摘要

無銷推進器安裝於艉軸，是利用錐體表面接觸，完全依靠摩擦阻力，在無滑動的情況下傳遞動力。推進器裝妥在軸上之後，常年浸泡在海水之中，銅質推進器的膨脹係數大於鋼軸的膨脹係數，由於海水溫度每年四季有不同變化，熱時趨鬆，仍應保持足夠的摩阻扭矩，冷時趨緊，推進器轂的內緣張應力增加，仍應在安全範圍之內。國際船級協會聯合會(IACS)在1978年有統一規定，僅部份船級協會，大同小異的採用以公式訂出規範。本文亦以稍異之觀點，整理訂出安裝之許範圍，以便採納為規範使用。

關鍵字

摩阻扭矩 ； 厚壁圓筒 ； 合成應力

並列摘要

The fitting of a keyless propeller on tail shaft cone is to make use of time contact friction between the mating surfaces for power transmission. When the keyless propeller is fitted on tail shaft, It is submerged in sea water all the year round. When sea temperature rises, the contact surface lends to become loose but it is still sufficient to resist the transmitted power against slip. When sea temperature drops, the contact surface lends to become more light and thus increases the hoop stress of propeller hub inner surface though it is kept at a safe level. International Association of Classification Socicticss (IACS) publisahed a unified requirements in 1978. Only some of the Socictics adopted the requirements in their Rules with minor changes. In this paper, the auther has developed the formulae to limit the fitting ranges in line with the idea of IACS but the expressions are somewhat different for practical use and inclusion in CR Rules when they are revised.

並列關鍵字

Friction torque ； Thick wall cylinder ； Combined stress