tag:blogger.com,1999:blog-4169460682431361727.post3818910304402368089..comments2024-03-17T16:51:15.045+00:00Comments on Diary of a Powerspout installation: Shaft frictional lossesBillhttp://www.blogger.com/profile/00221645601047980048noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4169460682431361727.post-69436658450444991592015-07-05T18:05:35.251+01:002015-07-05T18:05:35.251+01:00Si, - yes I agree a dynamic friction test would be...Si, - yes I agree a dynamic friction test would be better but I can't figure how to do it with just 'kitchen sink' apparatus. And yes, the shaft seal does add considerable drag and consequent power loss. The type of seal used is a double lip, N butyl rubber seal (SKF equivalent being 692321) and it might be possible to improve things by using a single lip I suppose. A possible future investigation perhaps ?Billhttps://www.blogger.com/profile/00221645601047980048noreply@blogger.comtag:blogger.com,1999:blog-4169460682431361727.post-7043932485396091332015-07-05T17:10:54.031+01:002015-07-05T17:10:54.031+01:00I think you need to devise a dynamic friction test...I think you need to devise a dynamic friction test for your bearings/seal setup. You are assuming that static friction will be proportional to dynamic friction. Is this a reasonable assumption?<br />Also have you looked at different types of shaft seal? It seemed to have a significant effect.Simonnoreply@blogger.com