【Daily Question】Pump Equipment Technical Exchange Edition 20180120
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Participation: Prize 3 Wealth； Correct answer: Reward of 10 wealth points ； Note: A reward of 10 wealth points will be given for correct answers within 48 hours; this post is valid for 48 hours. Multiple-choice question: Which of the following is not a fault of a sealed surface? ( ) A. Wear B. Degradation C. Deformation D. Thermal cracking. Correct answer: B https://attach01.hcbbs.com/forum/201801/05/235057wnwxbzxb311ikvvz.jpg.thumb.jpg
B...........
Answer: A. Deformation of the friction pairs in a mechanical seal, thermal cracking, and deterioration of the auxiliary rings can all lead to the failure of the mechanical seal. The operation of a mechanical seal relies on the friction pairs staying in contact as they rotate in order to achieve sealing, and normal wear is inevitable. Incorrect selection of mechanical seals, as well as improper specific pressure during design, can lead to excessive wear of the mechanical seals and reduce their service life
B~~~~~~~~~~~