johnsmachines

machines which I have made, am making, or intend to make, and some other stuff. If you find this site interesting, please leave a comment. I read every comment and respond to most. n.b. There is a list of my first 800 posts in my post of 17 June 2021, titled "800 Posts"

Tag: Wedlake and Dendy

Royal Geelong Show 2019

The “Show” was held over the last 4 days.  I will not bang on again about my republican leanings.  See posts from previous years if that persuasion is of any interest.  The weather was ordinary.  Quite a few showers and blustery wind.  But we were mostly warm in the Vintage Machinery shed where our Model Machinery cage is located.  Fairly good visitor numbers, but not much real interest in our model engine offerings.

I exhibited my beam engine and Trevithick dredger engines, both running on piped steam.  The vertical boiler and feed pump was on static display, of no interest to anyone.  My Stirling engine got the most attention from kids, who are attracted by the swirling spiral colours, and not much interest in the intriguing method of running.  I am convinced that models must be moving, colourful, and have some relation to what people and kids see on television if they are to have any traction with the public.

But, the model and full size engine exhibitors enjoyed the displays, and an occasional visitor engaged in conversation.  Here are some pics and videos of some of the shed displays.  There dog shows, bird breeding, monster trucks,  horse riding events, cattle and sheep judging, and side show rides but these were not recorded by me.   I did visit the Amateur Astronomy display, and will visit the workshop of one of the exhibitors soon.

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Beam with lagging.JPG

I had applied wooden lagging to the beam engine cylinder

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Steam for the engines is provided from this Package Boiler at 25psi.   Enough to turn them over.  Capable of much higher pressures.

Package boiler diag

cage bench north

Cage Bench North includes the Trevithick dredger model, the beam engine and the Stirling engine.

Cage bench south

Cage Bench South.  Swen Pettig’s prize winning flame gulper, and 1″ Minnie under construction.

Stuart swen

Stuart and Swen ?discussing engine repairs.

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Model Engineering first prize!

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And the full size triple expansion engine.  The Vintage Machinery boiler is being upgraded, so there was insufficient steam to run the triple.

 

 

Steam Engine Oilers

Knowing that I have an interest in CNC machining, Tom, from the Vintage Machinery Club in Geelong asked me to make a pair of oilers for a very old Wedlake and Dendy steam engine.  The engine is a large (to me anyway) stationary engine, which is run on steam several times each year.  The oilers for the cross slides were missing.

We searched the Internet for pictures of W&D steam engines, but could find no pictures or diagrams of the oilers.  So Tom sketched a design, and I drew a CAD diagram.  The dimensions were finally determined by the materials which I had available…  some 1.5″ brass rod and some 1.5″ copper tube.

This is the almost finished product.

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Just needs 1/4″ BSPT fittings and and oil wick tube so they can be fitted to the engine.

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The copper tube silver soldered to the brass cylinders (top), the brass blanks for the lids (bottom) and the mandrel to hold the assembly (bottom centre) during CNC turning and drilling.

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The mandrel to hold the body (left) and the mandrel for the lid (right).  The cap screw head and hole in the mandrel have a 2 degree taper.  The slits were cut with a 1mm thick friction blade.

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Rough turning the base.

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Turning the lid.  The mandrel is held in an ER32 collet chuck

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Engraving the lid.  Using a mister for cooling and lubrication.  16000rpm, 200mm/min, 90 degree TC engraving cutter.

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The oilers work by wicking the oil from the reservoir into a tube which drains through the base onto the engine slide.  When the wick tubes are fitted the oilers can be fitted to the engine.

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The 1865 Wedlake and Dendy

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1865

My lathe is a Boxford TCL125, using Mach3.  The G code is generated using Ezilathe.

Below is a link to an oil cup from “USS Monitor”, of American civil war fame.   One of the first ironclads, powered only by steam.

http://www.marinersmuseum.org/blog/2010/04/one-oil-cup-down/

(ps. The  lathe which I was converting to CNC was the subject of previous posts and is now working, but needs some guards fitted and a bit of fine tuning.)