Nozzle

Chief Engineer · Post by **Chief Engineer** » Fri Nov 19, 2021 12:26 am

Can someone help, i can draw this nozzle,i am new in freecad use.

Post by **chrisb** » Fri Nov 19, 2021 1:21 am

Hi and welcome to the forum!

For a start is here an angled PartDesign helix:

papyblaise · Post by **papyblaise** » Fri Nov 19, 2021 8:44 am

is the pitch constant or not

Post by **chrisb** » Fri Nov 19, 2021 9:49 am

papyblaise wrote: ↑Fri Nov 19, 2021 8:44 am is the pitch constant or not

From what I can see on the screen it is constant. Only due to the decreasing radius it gets steeper and steeper.

papyblaise · Post by **papyblaise** » Fri Nov 19, 2021 10:11 am

the question is for @Chief Engineer
moreover it seems that the section is not constant

Post by **chrisb** » Fri Nov 19, 2021 11:06 am

papyblaise wrote: ↑Fri Nov 19, 2021 10:11 am moreover it seems that the section is not constant

That't the bigger problem. I try to solve it with another helix of slightly different pitch.

kisolre · Post by **kisolre** » Fri Nov 19, 2021 11:39 am

Here is my take without any proper dimensions.
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Chief Engineer wrote: ↑Fri Nov 19, 2021 12:26 am Can someone help,

May I ask where is this from? Our guess here is a nozzle for exhaust gas boiler water cleaning...

Post by **chrisb** » Fri Nov 19, 2021 11:56 am

This uses a double helix, one additive and one subtractive:

Shalmeneser · Post by **Shalmeneser** » Fri Nov 19, 2021 1:50 pm

This nozzle has turned my head.

Chief Engineer · Post by **Chief Engineer** » Sun Nov 28, 2021 2:45 pm

Pitch is not constant, this nozzle is from ship's scrubber (exhaust cleaning system)sorry for the photo