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Post by Malcolm on Feb 5, 2006 21:28:06 GMT
Have the group any views as to which is the best design (eg most reliable and easiest to make) of mechanical lubricator. I have seen designs with crank and oscillating cylinder; and fixed cylinder with a cam. I think there was one without an inlet ball valve, just relying on the movement of the piston to uncover a port. Any ideas or reports on actual use welcome.
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Post by alanstepney on Feb 5, 2006 22:28:24 GMT
I like the oscillating cylinder type a la LBSC.
It has the possible advantage that the portface adds an extra seal in the event that the ball valve sticks open, and theoretically, it still shouldnt blow all the oil out of the tank.
However, Martin Evans used the scotch crank design on several of his engines (perhaps all, I'm not sure) and they seem to work OK.
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Post by steamjohn248 on Feb 5, 2006 22:32:58 GMT
Yes. The EWING design which has a yoke driven by a pin on a disc or a cam. the delivery rate can be varied by a spacer in the pump body, the ram works in two 'O' rings no ball valves to stick or clog up, No NRVs. We have built numbers of these, (using roller clutches) and they are bomb proof. I think I may still have the drawings on my E mail archive.
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Post by steammadman on Feb 5, 2006 23:01:58 GMT
oil a la LBSC is a well tried and tested design.
I've made and fitted quite a few to different types of
engine ,only had trouble with one,and i think that was my own fault
So go ahead Malcolm ,be like many,many followers before you ,
FOLLOW THE MASTER old Curly
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Post by Tel on Feb 6, 2006 9:17:22 GMT
I'm also in the Jim Ewing's 'plunger thru two o rings' camp - easy to make & work like a charm
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waggy
Statesman
Posts: 747
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Post by waggy on Feb 6, 2006 12:34:25 GMT
Could anybody e-mail the Jim Ewing drawings to me? Need to make four pumps for the Duchess.
dave45680@hotmail.com
Waggy.
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Post by Malcolm on Feb 6, 2006 21:49:33 GMT
I think I have a drawing of the LBSC one, but I would be grateful for a drawing of the Ewins design too. Malcolm.
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Post by steamjohn248 on Feb 7, 2006 0:37:39 GMT
I think I started a trail of errors here and its Ewins not Ewings who designed the magic lubricators.
He was on the old site and was kind enough to E mail a set of drawings to myself and several others a year or two ago. I printed them off and they are in the file in the workshop but unfortunately our hard disc gave up a few weeks ago and so I lost a huge file of interesting stuff on the computor. Someone may be able to find him on the net or he may read this. If anyone is really stuck I will scan the drawing back into this drive and then can E Mail or alternatively I could make hard copies and post them. The lubricators really are the D Bs and I dont suppose he would mind
Steamjohn
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Post by 3405jimmy on Feb 7, 2006 7:28:34 GMT
Has anyone seen a viable multipoint design that would deliver to at least 4 points? That I can shoehorn into a scale box size of 1.75” X 2”
Jim
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Post by steamjohn248 on Feb 7, 2006 11:33:35 GMT
Further to mine above re the EWINS lubtricator. The drawing we got via E Mail from Jim was a bit fuzzy but have now dug up a better one published in M. E. for 13th June 2003 page 683.
If anyone cannot access old copies of M.E. and would like a copy of the page, I will photo copy and send it surface mail. Initial contact through this thread.
Steamjohn
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Post by ron on Feb 7, 2006 12:18:50 GMT
Steamjohn
Don't know if this is of any help to you but I had a similar problem with a hard disc at the back end of last year, it took a wobbly and deleted a HUGE pile of scanned slides, my son retrieved them for me using a programme called 'Retrieve my files' which he downloaded from the net, it is a bit slow but it retrieved 99% of the pictures and was certainly a lot less laborious than reinstalling them using backup CDs.
Ron
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Post by steamjohn248 on Feb 7, 2006 13:17:57 GMT
Ron
Thanks for that. unfortunately the local IT casualty centre found it was rather more serious and the whole computor is now in a land fill site. Nothing like a filing cabinet (Fireproof of course). Anyway as above I've got the drawings if anyone wants them, another boo boo, we are speaking of the late and I'm sure much lamented J Ewins.
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Post by Tel on Feb 7, 2006 17:46:49 GMT
Yup, there was a design some years ago (quite some years ago) in ME - 12 point I think, I abreviated it to an 8 point & had it on the Simplex for a while before I changed over. Finding the article's might be another story  Has anyone seen a viable multipoint design that would deliver to at least 4 points? That I can shoehorn into a scale box size of 1.75” X 2” Jim
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Post by Peter W. on Feb 7, 2006 21:58:28 GMT
There is also
" EWINS oil pump, General arrangement"
and some comments in Neville Evans's series,
M.E. 4252 (8 July 2005) pgs 87 to 89
Maybe one day ..... !
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Post by 3405jimmy on Feb 8, 2006 20:29:35 GMT
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Post by Tel on Feb 9, 2006 9:35:27 GMT
Thanks Jim, very impressive indeed. If I think of it I'll did my old one out tomorrow & try for a pic
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Post by Tel on Feb 9, 2006 9:46:54 GMT
oops - just remembered I have some.
The box is about 2" x 2" x 2" ... and here's a peek inside .... and here's wots in there + 16 little springs
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Post by 3405jimmy on Feb 9, 2006 10:50:02 GMT
Bloody hell mate, there’s some work went on in that, how did it perform?
Jim,
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Post by Tel on Feb 9, 2006 10:57:51 GMT
 Well, as I said, the original article in ME was for a 12 point version - even more work there.
It worked quite well actually, tho I had to shuffle the pipes around a bit as the first two outlets I picked for the steam chests had a wee bit of blowby
From memory (and it's 20 years ago) there was about 40 hours went into it
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Post by steammadman on Feb 9, 2006 21:48:35 GMT
I have both copies in front of me now. if anyone would like a copy
i'll copy them for you ,just give me a shout
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Well, as I said, the original article in ME was for a 12 point version - even more work there.