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Valve gear remote troubleshooting (updated) http://www.rypn.org/forums/viewtopic.php?f=1&t=48134 |
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Author: | SAS [ Sat Jun 08, 2024 6:00 am ] |
Post subject: | Valve gear remote troubleshooting (updated) |
How it started: After a period of calculating valve gears in MS Excel, many years ago I did some successful quick troubleshooting for a small 600 mm gauge steam loco's valve gear that was performing very poorly. We measured the piston and valve positions in 4 steps, I drew an Excel diagram ellipse, extracted the proportional part of valve piston movement, calculated the new dimension of a lever bearing position via the rule of three. All this was done within about two hours. Then the loco's owner made two new levers (some kind of combination lever, for Hackworth valve gear) from flat steel, and the loco got back its power like in new state, or even more. Now I own a valve gear simulation software with optional semi-automatic pre-optimization since more than 15 years, and now also with an additional highly flexible new solver tool on top, which allows me to rapidly simulate and analyze your Walschaerts valve gear (other types currently to be modeled in MS Excel, or to be newly implemented in my software) and find the point to be modified, possibly even starting from a photo and some measured coordinates of piston and valve position. What we offer: Valve gear remote troubleshooting! There are two options how remote troubleshooting can be started:
Further steps:
How easy it already could be: At the beginning of this year, the owner of a 15" gauge steam loco for a fun park asked for access to my valve gear design program to check his loco's valve gear. He modeled the current kinematic skeleton dimensions and later on asked me for advice. I roughly modeled a version with automatically pre-optimized dimensions and noticed soon that my angle between the main pin and the eccentric crank pin was nearly an exact mirror image to his one. So I told him to check if his drive axle could be mounted in wrong orientation... and he confirmed! There are very different reasons why someone asked for support, but our highly efficient software allows us to concentrate on the overall image of valve gear behaviour instead of loosing lots of time by fiddling with detail parameters. So I am optimistic that we can help out in very most of all cases with highest efficiency. I really would appreciate to support you via remote troubleshooting to help you getting an excellently working valve gear. |
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