When should the frequency of performance testing for thermometer casings be 0.4 and when should it be 0.8?
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When should the frequency of performance testing for thermometer casings be 0.4 and when should it be 0.8? Let’s discuss this together.
"What does the frequency of performance testing for thermometer casings mean by “”? I don’t understand; could the original poster explain it first?
I don’t understand either the ratio of the wake vibration frequency to the natural frequency of the thermometer sleeve; it is recommended to consult the latest version of ASME PTC 19.3
The ratio of the vibration frequency to the natural frequency of the thermometer bulb has, according to ASME PTC 19.3, two possible values: either less than 0.8 or less than 0.4
Hehehe, these days, industrial thermometers are all made by some guys from Tianchang Jinhu who work feeding pigs – who the hell is going to conduct vibration tests on them? What about university professors? Do they carry out such tests? Hell no; professors just copy books and take care of their kids and that’s it. What do you do? Have you done vibration tests before? If you have, please guide us, Bai – we’re all idiots. We’ve used tons of thermal resistors and thermocouples. If you ask how thick or thin the thermocouple resistance should be, we have no idea; we’re not even brave enough to fart loudly. .
What does this mean? What happens if the natural frequency becomes comparable to the vibration frequency generated by the medium flow, resulting in resonance? This is a bit difficult, right?
Look at that standard you’re talking about again – it’s such a trivial thing. Spending dozens of pages on it seems utterly pointless. It’s just about materials, diameter, wall thickness, insertion depth, sealing, and welding – nothing more than that. Why spend dozens of pages on such trivial matters? Only someone who works feeding pigs would write something like this; who would even want to read it? The person who writes these standards probably doesn’t even understand what he’s writing. All they do is modify 1% of the content and copy the rest 99%, then come out acting smart after a few years. It’s basically a bunch of idle people just writing nonsense. . .
I’ve never heard of this situation in the field of design
How do you determine the suitability of temperature sleeves?
There is a rationale behind these standards; some of them are simply beyond our understanding. This set of standards has been in existence for a long time, and we are only learning about it today. We had heard of 0.8 before, but today we see 0.4 – we just don’t understand it, so we’ve gathered together to discuss it. If you think you understand, please share your thoughts with everyone; avoid using a lot of meaningless words in this discussion.