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Drain cock operating valve

Posted: Wed Nov 03, 2021 3:45 pm
by dampfspieler
Kelly,

i received it in the second trial, thank you so much.

Hi all,

to operate the drain cock an operating valve is needed. The idea comes from a friends 5" steam loco. Depending on the requirements, the cylinder drain valves can also be arranged in groups with a single operating valve. Here a sectional view.

Steuerventil_kplt.jpg
Steuerventil_kplt.jpg (35.75 KiB) Viewed 2247 times
A 2D sketch without dimensions.

Steuerventil_kplt_20211103.jpg
Steuerventil_kplt_20211103.jpg (54.03 KiB) Viewed 2247 times
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Dietrich

The d-slide-valves

Posted: Sun Nov 14, 2021 7:23 pm
by dampfspieler
Hi,

the slide valve bodies are ready. I have built them from gunmetal bar stock. The valve chests are also milled.

Twin3238_073kl.JPG
Twin3238_073kl.JPG (94.07 KiB) Viewed 2054 times
Twin3238_075kl.JPG
Twin3238_075kl.JPG (50.63 KiB) Viewed 2054 times

The sliding surfaces of the D slides were finely milled and honed on fine abrasive cloth.

Twin3238_079kl.JPG
Twin3238_079kl.JPG (69.33 KiB) Viewed 2054 times

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Dietrich

Gland packing nuts and spanner

Posted: Mon Nov 29, 2021 8:25 pm
by dampfspieler
Hi,

the gland packing nuts are finished. Every nut has six holes 3 mm wide 4,5 mm deep.

Twin3238_091kl.jpg
Twin3238_091kl.jpg (45.75 KiB) Viewed 1900 times

Twin3238_090kl.jpg
Twin3238_090kl.jpg (46.9 KiB) Viewed 1900 times

Twin3238_089kl.jpg
Twin3238_089kl.jpg (26.33 KiB) Viewed 1900 times

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Dietrich

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Mon Nov 29, 2021 8:29 pm
by dampfspieler
Hi,

how to use the spanner is shown below.

Twin3238_087kl.jpg
Twin3238_087kl.jpg (50.71 KiB) Viewed 1899 times

Twin3238_088kl.jpg
Twin3238_088kl.jpg (50.36 KiB) Viewed 1899 times

The steam channel in the valve chest body was milled at an angle of 15° so that the resistance to the steam flow is as low as possible.

Twin3238_081kl.jpg
Twin3238_081kl.jpg (77.32 KiB) Viewed 1899 times

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Dietrich

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Mon Nov 29, 2021 9:22 pm
by DetroiTug
Hi Dietrich,

Nice work. Here is an idea to secure your packing glands. I made these leaf springs from 1095 steel, then tempered them. Very easy to make.

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Mon Nov 29, 2021 9:48 pm
by DetroiTug
A better picture

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Tue Nov 30, 2021 12:40 am
by cyberbadger
DetroiTug wrote:
Mon Nov 29, 2021 9:48 pm
A better picture
Looks like a robust solution for self disassembling engines! 8-)

I had a valve packing nut unscrew it self completely this summer. Luckily it didn't really interfere with anything - it just dropped down to the top of the valve slide. I stopped for a few seconds and spun it back on and got on my way. :lol:

-CB

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Sun Dec 12, 2021 9:01 pm
by dampfspieler
Hi,

some little progress. I have got the crankshaft bearing blocks, the replacement ball bearings, the bevel gear set spiral toothed and some material.

Twin3238_094kl.jpg
the bearing blocks
Twin3238_094kl.jpg (47.79 KiB) Viewed 1686 times

Twin3238_095kl.jpg
the original (right) and the replacement (left) ball bearings
Twin3238_095kl.jpg (90.86 KiB) Viewed 1686 times

Twin3238_096kl.jpg
the bevel gear set
Twin3238_096kl.jpg (128.48 KiB) Viewed 1686 times


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Dietrich

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Mon Dec 13, 2021 6:44 pm
by dampfspieler
Hi.

the parts arranged on a floor plan.

Twin3238_108kl.jpg
Twin3238_108kl.jpg (61.83 KiB) Viewed 1652 times

Twin3238_107kl.jpg
Twin3238_107kl.jpg (94.96 KiB) Viewed 1652 times

A little movie.
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Dietrich

Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Posted: Sun Jan 02, 2022 6:07 pm
by dampfspieler
Hi,

a lot of work was done. The flywheel was turned inside and out. It will attached to the crankshaft with a clamping set. Therefore the hub was turned out accordingly

Twin3238_111kl.jpg
Twin3238_111kl.jpg (132.46 KiB) Viewed 1403 times

The columnes were turned to length and the threads for the fastening bolts were tapped. They were made from 12 mm stainless steel.

Twin3238_115kl.jpg
Twin3238_115kl.jpg (28.43 KiB) Viewed 1403 times
Twin3238_119kl.jpg
Twin3238_119kl.jpg (34.87 KiB) Viewed 1403 times

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Dietrich