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To: Myrddin

“There are sensors on the inboard and outboard bearing adaptors at each wheel.”

Interesting post. A sensor on each wheel adds up to a lot of sensors on a train! I saw on the news tonight that there are sensors in the track that can pick up an overheated bearing as the train goes them. Guess trains are loaded up with electronics like everything else.

[see the “everything” above? Immediately after I typed that word, this very smart text box inserted the “else”. Annoying.]

I vaguely remember when sleeve bearings were replaced with tapered roller bearings. Is that what put Timken on the map? I remember guys walking alongside a stopped train looking for hotboxes and oiling the bearings.


28 posted on 02/23/2023 4:48:28 PM PST by cymbeline
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To: cymbeline
The bearings on my cars were Timken. One was a generator bearing with a 12 pole tachometer output. The accelerometers in the bearing adaptor captured vibration from cup, cone, cage and rollers. I sampled 100,000 samples per second for 20 seconds each day, then did FFT to extract 5 harmonics of each component. The analysis was trasmitted via 1xRTT CDMA to my server in Fairfax, VA.
30 posted on 02/23/2023 5:25:22 PM PST by Myrddin
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