【Pump Technology Edition: Daily Question】March 9, 2020 (Section benefit: 10 Wealth points as a reward for answering correctly before the answers are revealed)
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128. In addition to high requirements for installation techniques, high-speed mechanical seals also impose strict demands on the installation techniques of the machine itself; the shaft’s play should not exceed ( ) mm. A、0.15 B、0.3 C、0.5. The answer will be revealed the day before it is officially announced. Those who guess correctly before the announcement will receive 10 wealth points, those who get it right after the announcement will receive 5 wealth points, and those who participate will receive 3 wealth points. I’ve been a bit busy lately, so I’m responding to questions and giving scores a bit slowly, but no matter how busy or late it gets, I will still post answers and respond to everyone. Thank you all for your continued support!
A large B value results in greater kinetic energy upon collision of the sealed end faces; too small a value can lead to burning due to heat generated by friction