ISS Ammonia Pump Failure, Recovery, and Lesson Learned - A Hydrodynamic Bearing Perspective
ISS Ammonia Pump Failure, Recovery, and Lesson Learned - A Hydrodynamic Bearing Perspective
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ISS 氨泵故障、恢复和经验教训 - 液力轴承视角
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Richard A. Manco
中科院分区：
文献类型：
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作者：
R. Bruckner;Richard A. Manco
长寿命航天硬件的设计、研制和运行已成为一个演变过程，在这个过程中，对细节的细致关注和从以往经验中吸取的教训起到了至关重要的作用。对这一过程来说，无价之宝是找回和检查经历了过早故障的航天硬件的能力。虽然这些情况是罕见和不幸的，但故障调查和从事件中恢复对于推动未来的空间机制发展具有重要意义。这种情况始于2010年7月31日，国际空间站外部主动热控系统上的氨泵过早故障。对返还的泵进行的地面检查和随后的故障调查发现，在泵的设计阶段和合格测试中没有考虑到五种潜在的轴承力。这些力可能以任意方向组合在一起，使泵轴承过载，导致固体表面接触、磨损和过早失效。恢复计划确定了这五种力中的一种与泵运行速度的平方有关，这一事实被用来通过改变泵模块运行的飞行规则来恢复设计寿命。通过对泵磨损寿命的故障调查、恢复和后续评估，已经制定了设计指南，以提高未来用于人类和机器人探测任务的机械泵热控制系统的寿命。
The design, development, and operation of long duration spaceflight hardware has become an evolutionary process in which meticulous attention to details and lessons learned from previous experiences play a critical role. Invaluable to this process is the ability to retrieve and examine spaceflight hardware that has experienced a premature failure. While these situations are rare and unfortunate, the failure investigation and recovery from the event serve a valuable purpose in advancing future space mechanism development. Such a scenario began on July 31, 2010 with the premature failure of an ammonia pump on the external active thermal control system of the International Space Station. The ground-based inspections of the returned pump and ensuing failure investigation revealed five potential bearing forces that were un-accounted for in the design phase and qualification testing of the pump. These forces could combine in a number of random orientations to overload the pump bearings leading to solid-surface contact, wear, and premature failure. The recovery plan identified one of these five forces as being related to the square of the operating speed of the pump and this fact was used to recover design life through a change in flight rules for the operation of the pump module. Through the course of the failure investigation, recovery, and follow-on assessment of pump wear life, design guidance has been developed to improve the life of future mechanically pumped thermal control systems for both human and robotic exploration missions.