Free 186 More Best Homemade Tools eBook:  
Get 2,000+ tool plans, full site access, and more.

User Tag List

Page 10 of 12 FirstFirst 1 2 3 4 5 6 7 8 9 10 11 12 LastLast
Results 91 to 100 of 119

Thread: Small Boiler

  1. #91
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    In preparation for silver soldering the phosphor bronze saddle to the boiler I've been running some coupon tests.

    Effectively looking at applying silver solder in different locations on the bolted sandwich of copper and phosphor bronze.

    Small Boiler-solder-test-01.jpg

    Interestingly the silver solder happily tracks (capillary action) through the joint, including through the threaded section.

    Small Boiler-solder-test-07.jpg

    The right hand side configuration appears to have given the most complete joint. I then sectioned the joints:

    Small Boiler-1st-test-pb-boltcopperpb-plate-01.jpg

    You can see that on the LHS the thread of the bolt has voids where silver solder has not tracked completely through all interfaces.

    Left and right hand side parts are consistent through the images, although I have had to mirror some of the images to make this consistent (this doesn't affect the results).

    186 More Best Homemade Tools eBook

  2. The Following 2 Users Say Thank You to editor@glue-it.com For This Useful Post:

    Ralphxyz (Sep 9, 2021), yvonf (Sep 8, 2021)

  3. #92
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    Around the saddle I want to mask so that I can control how far the silver solder goes. I did some research and there are lots of options from liquid paper to yellow ochre. However, the option readily available is the graphite pencil:

    Small Boiler-silver-solder-masking-01.jpg

    Small Boiler-silver-solder-masking-05.jpg

    This appears to have worked ok.

    2000 Tool Plans

  4. #93
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    I've been stuck for a few months, a total roadblock on how to make the steam valve. Especially as I have machine this into the PB saddle that itself has had lots of hours put into it. But, after a clean up of the workshop it is back on the bench. I will solve this problem.



    There are a few more items on the list of next things to do on the Burrell

  5. The Following User Says Thank You to editor@glue-it.com For This Useful Post:

    clydeman (Nov 2, 2021)

  6. #94
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    I made the decision to make the steam control valve a remote valve.



    The best bit is I made a decision and this allowed me to move forwards. So I could then silver solder the saddle to the boiler.

    Small Boiler-burrell-traction-engine-01.jpg

  7. The Following User Says Thank You to editor@glue-it.com For This Useful Post:

    KustomsbyKent (Nov 2, 2021)

  8. #95
    Supporting Member Canyonman44's Avatar
    Join Date
    Mar 2014
    Posts
    64
    Thanks
    241
    Thanked 8 Times in 7 Posts
    Looking Good!!!!!!!

  9. The Following User Says Thank You to Canyonman44 For This Useful Post:

    editor@glue-it.com (Nov 4, 2021)

  10. #96
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    The double eccentric will give me forward and reverse, however, I thought it was going to be tricky machining it. I think it turned out ok.

    Small Boiler-double-eccentric-burrell-01.jpg


  11. #97
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    For the vertical boiler I came up with a multi-layered insulation. For the Burrell traction engine this needs to be shrunk down to 1.5mm in thickness, quite a challenge.

    So, I have built a boiler thermal new test object.

    Small Boiler-heating-barrel-01.jpg

    It's heated in the centre using a 50W ceramic heater (4mm diameter). I will then use the cooling curves to estimate the heat loss.

    I will look at the maximum insulation and then a few more sensible options.

  12. #98
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    A short video showing the setup with the end supports:


    Interesting to see the thermal conductivity of wood and where balsawood sits on the curve.

  13. #99
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    After a lot of help from a fellow steam model engineer I've managed to make and silver solder the boiler end plate stiffeners in place.

    Small Boiler-boiler-endplate-09.jpg

    I think I'm a gluten for punishment pursuing the silver soldering in a kiln. The Easy Flo 24 did not flow as well as some of the lower temperature silver solders.

  14. The Following User Says Thank You to editor@glue-it.com For This Useful Post:

    nova_robotics (Nov 22, 2021)

  15. #100
    Supporting Member editor@glue-it.com's Avatar
    Join Date
    Apr 2017
    Location
    UK
    Posts
    291
    Thanks
    40
    Thanked 476 Times in 136 Posts

    editor@glue-it.com's Tools
    The boiler test object is generating repeatable cooling curves

    Small Boiler-unclad-test-repeatability.jpg

    This is great, but what is the heat output of the object

    Small Boiler-unclad-test-repeatability-heat-output.jpg

    So I now have a curve that gives me heat output against a delta temperature compared to ambient.

    Next is the maximum insulation versus the unclad boiler:

    Small Boiler-heating-barrel-04.jpg

    This shows quite a significant difference:

    Small Boiler-unclad-vs-max-insulation-heat-output.jpg

    Interestingly this boiler is just a piece of copper pipe and so I can compare my heat loss data of the unclad boiler to published heat loss data of copper pipes:

    Small Boiler-unclad-vs-published-copper-pipe-data-02.jpg

    That looks like not a bad match considering we don't know the surface condition of the copper pipe.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •