how do you create a volute?

[mandrews67]

I need to create a volute for a project. I assume you create a pattern of points with an equation then create a curve through the points. If so, what is the equation? Once curve is created do you use a variable section sweep? or is there another option? A model of a volute would help tremendously so I could see how it was created.


Thanks

 

[SRINIVASANIYER1]

Have a look at the following link...
Parametric Equation of an involute of a circle
http://en.wikipedia.org/wiki/Involute
Edited by: SRINIVASANIYER1

 

[bcooper]

I use create a curve from equation and sweep the curve with whatever geometry I need. Creating a volute can be a lot more complicated than this depending on what it is for but this is a good place to start.


Create a curve, from equations, use cylindrical coordinate system.


the equation is


r= r1+t*(r2-r1)


theta = t*360*1


z=0


r1= inner radius, where you start and r2 is the outer radius where you end


theta is the number of revolutions the curve will make


z is the rise of the curve in the z axis.





hope this helps.

 

[hari1984]

here you go,

1. define the volute sections at particular angle ( ex.
circular , trapezoidal, rectangular, etc at as per
design)
2. draw the spiral ( scroll) through that points .( or
define using Cartesian co-ordinate).
3. use swept blend or boundary blend as per ur
convenience.

pls have a look on "Centrifugal pumps: design &
application--S Lobanoff and Robert R Ross"

page 61..

http://books.google.co.in/books?id=-
LPJ8yN80SEC&pg=PA172&dq=volume+design+by+S+Lobanoff+and+R
obert+R+Ross&hl=en&sa=X&ei=xIJxT9WyFI3BiQef2rXkDw&redir_e
sc=y#v=onepage&q&f=false


Thanks,

Hari