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The position of the sump tank of the two-stroke diesel engine is often in--------0 A. the double bottomB. the crankcaseC. the coffer tankD. the after peak tank

The position of the sump tank of the two-stroke diesel engine is often in--------0

  • A. the double bottom
  • B. the crankcase
  • C. the coffer tank
  • D. the after peak tank

题目解答

答案

这道题目是关于二冲程柴油机的油底壳(sump tank)位置的问题。油底壳是用于储存润滑油的容器,通常位于发动机的底部。下面我们来分析每个选项: - A. the double bottom(双层底):双层底是指船体底部的两个平行的水平结构,通常用于储存燃油、压载水等。将油底壳设置在双层底是合理的,因为这样可以充分利用船体的空间,并且便于收集和回收润滑油。 - B. the crankcase(曲轴箱):曲轴箱是发动机的一部分,用于容纳曲轴和连杆等运动部件。虽然曲轴箱内也会有润滑油,但油底壳通常不会设置在曲轴箱内,因为曲轴箱的主要功能是保护和支撑运动部件。 - C. the coffer tank(隔舱):隔舱是船体中用于隔离不同液体或气体的舱室,通常用于储存燃油、压载水等。将油底壳设置在隔舱内不太合理,因为这样会增加管道的复杂性和维护的难度。 - D. the after peak tank(尾尖舱):尾尖舱是船体尾部的一个舱室,通常用于储存压载水或作为空舱。将油底壳设置在尾尖舱内也不合理,因为这样会增加润滑油的输送距离,影响发动机的正常运行。 综合以上分析,最合理的选项是A. the double bottom(双层底)。 因此,正确答案是:A. the double bottom。

解析

本题考查二冲程柴油机油底壳(sump tank)的位置。解题核心在于理解油底壳的功能及其在船舶结构中的合理布置。

  • 油底壳的作用:储存润滑油并收集回流的润滑油,通常位于发动机底部,便于收集和循环。
  • 关键知识点:船舶结构中,双层底(double bottom)是船体底部的双层空间,常用于储存燃油、润滑油等液体,且空间较大,便于布置油底壳。其他选项如曲轴箱、隔舱、尾尖舱的功能与油底壳的存储需求不匹配。

选项分析:

  1. A. the double bottom(双层底)
    双层底是船体底部的双层结构,空间充足且便于集中管理液体储存。油底壳设于此处可有效收集润滑油,符合实际工程布置原则。
  2. B. the crankcase(曲轴箱)
    曲轴箱主要容纳曲轴、连杆等运动部件,内部空间有限且需优先保证机械运动,不适合直接作为润滑油存储空间。
  3. C. the coffer tank(隔舱)
    隔舱用于隔离不同液体或区域,通常不直接连接发动机系统,布置油底壳会增加管道复杂性和维护难度。
  4. D. the after peak tank(尾尖舱)
    尾尖舱位于船尾,通常用于压载水或空舱,距离发动机较远,不便于润滑油的快速循环和管理。

结论:双层底(A)是最合理的选项。

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