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    Drawing a centrifugal pump volute

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    • jacbk612J Offline
      jacbk612
      last edited by

      this doesn't look like the best way to display an image maybe I should of made a jpg?

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      • jacbk612J Offline
        jacbk612
        last edited by

        jpg files atached


        volute-test1.jpg


        volute-test2.jpg


        volute-test3.jpg

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        • F Offline
          Futurepast
          last edited by

          Is this what you want? I use d Cris Fulmers bending tool to bend a flat impeller around the spiral from the vid above, and just rotated a few times. Oh I see you want the tube. Should bend the same way?

          Just checked yes it works but you have to "explode" the spiral for Cris's tool to work


          Untitled.skp

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          • M Offline
            mac1
            last edited by

            @futurepast said:

            Is this what you want? I use d Cris Fulmers bending tool to bend a flat impeller around the spiral from the vid above, and just rotated a few times. Oh I see you want the tube. Should bend the same way?

            Just checked yes it works but you have to "explode" the spiral for Cris's tool to work

            Have you looked at the link provided above? The draw metal plugin lets you draw it no time or does it not work as shown

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            • F Offline
              Futurepast
              last edited by

              I guess you are right lol I didn't play with any paramaters but I think it can do what he wants by changing the diamiters at each end


              Untitled.skp

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              • F Offline
                Futurepast
                last edited by

                @mac1 said:

                @futurepast said:

                Is this what you want? I use d Cris Fulmers bending tool to bend a flat impeller around the spiral from the vid above, and just rotated a few times. Oh I see you want the tube. Should bend the same way?

                Just checked yes it works but you have to "explode" the spiral for Cris's tool to work

                Have you looked at the link provided above? The draw metal plugin lets you draw it no time or does it not work as shown

                You create just the spiral and then you have to ungroup it for cris's tool to work. The part gets bent around the spiral

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                • M Offline
                  mac1
                  last edited by

                  @futurepast said:

                  @mac1 said:

                  @futurepast said:

                  Is this what you want? I use d Cris Fulmers bending tool to bend a flat impeller around the spiral from the vid above, and just rotated a few times. Oh I see you want the tube. Should bend the same way?

                  Just checked yes it works but you have to "explode" the spiral for Cris's tool to work

                  Have you looked at the link provided above? The draw metal plugin lets you draw it no time or does it not work as shown

                  You create just the spiral and then you have to ungroup it for cris's tool to work. The part gets bent around the spiral

                  Sorry I did not make myself very clear or did not understand your post.
                  The link I was referring was the one I posted early in the thread. It is a youtube video showing how to draw the 3d involoute using the draw metal plugin and does not use the shape bender. The plugin gives you the specific path profile and you can use the FAK to draw the profile you want. Here is the link for it http://www.drawmetal.com/download

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                  • jacbk612J Offline
                    jacbk612
                    last edited by

                    Right, here's a better version of this,I am just using curviloft and arcs. I will get the proper representation of a volute curve and raw that loft properly, then it just needs to be intersected at the top, and a cylinder punched through.

                    Jacques


                    volute-test4.jpg

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                    • M Offline
                      mac1
                      last edited by

                      @jacbk612 said:

                      Right, here's a better version of this,I am just using curviloft and arcs. I will get the proper representation of a volute curve and raw that loft properly, then it just needs to be intersected at the top, and a cylinder punched through.

                      Jacques

                      This is what you can get using the draw metal plugin. The plugin also has a taper maker but have not tried that yet.
                      Need for you to define the dimensions as well as the desired extruded cross section profiles

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                      • jeff hammondJ Offline
                        jeff hammond
                        last edited by

                        @jacbk612 said:

                        Right, here's a better version of this,I am just using curviloft

                        right.. curviloft is the correct tool to use.. but do it like this instead..

                        cloft.jpg

                        [edit].. well.. what p just said before me.. lol..
                        sorry.. i'll leave this up for the visuals..

                        dotdotdot

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                        • BoxB Online
                          Box
                          last edited by

                          Here's a five minute version done with Curve Maker and Taper Maker and all else standard tools. I think that's the sort of general shape you want.


                          Pump0.JPG


                          Took longer to animate than to draw.

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                          • M Offline
                            mac1
                            last edited by

                            Update, 6 dia, no eye, taper round .5 to .25". 1 turn h=3"
                            Waiting on dimensions and taper cross section ( selection limited to round, rect, diamond,>.....

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                            • pbacotP Offline
                              pbacot
                              last edited by

                              If the taper is geometric along the length, I found using Curviloft "create loft junctions along a given path" worked in one process.

                              I used BZ Toolbar curves uniform B- spline (though other ways should work), Chris Fullmer Perpendicular Face tools to put a circle on each end, and curviloft- using just a beginning and ending circle. Just an idea if it works for you.

                              MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                              • gillesG Offline
                                gilles
                                last edited by

                                Native tools.


                                centrifugal pump_V6.skp


                                centrifugal pump.png

                                " c'est curieux chez les marins ce besoin de faire des phrases "

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                                • jacbk612J Offline
                                  jacbk612
                                  last edited by

                                  Gilles, this approach seems like the most promising. The loft path seems like a single curve, how was it achieved? Is it a bezier curve?

                                  Thanks,

                                  Jacques

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                                  • pilouP Offline
                                    pilou
                                    last edited by

                                    2 tangent arcs-circle ?

                                    Frenchy Pilou
                                    Is beautiful that please without concept!
                                    My Little site :)

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                                    • gillesG Offline
                                      gilles
                                      last edited by

                                      Two tangent arcs.

                                      Edit: did you open the file?


                                      part 2


                                      centrifugal pump_V6.skp

                                      " c'est curieux chez les marins ce besoin de faire des phrases "

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                                      • gillesG Offline
                                        gilles
                                        last edited by

                                        @unknownuser said:

                                        mais je me doutais que le "bleu des mers du sud" avait encore dû frapper! 😉

                                        😲

                                        J'avoue ne pas comprendre. ❓

                                        " c'est curieux chez les marins ce besoin de faire des phrases "

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                                        • pilouP Offline
                                          pilou
                                          last edited by

                                          @ Gilles : Non même pas, j'avais même pas vu qu'il y a avait un fichier à charger! 🤓
                                          car d'habitude les fichiers à charger sont en fin de post!
                                          mais je me doutais que le "bleu des mers du sud" avait encore dû frapper! 😉

                                          Et merci pour les V6! Ah si tout le monde en faisait autant! ☀

                                          dog01.jpg

                                          Frenchy Pilou
                                          Is beautiful that please without concept!
                                          My Little site :)

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                                          • pilouP Offline
                                            pilou
                                            last edited by

                                            C'était pourtant évident! 💚

                                            bleudesmersdusud.jpg

                                            Frenchy Pilou
                                            Is beautiful that please without concept!
                                            My Little site :)

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