Updated Diffusion Pump Assembly and Thermal Modeling
Posted: Mon Oct 15, 2018 10:40 pm
I have been recently working on the new designs for my vacuum system to incorporate the large 8" baffle to the EO4 diffusion pump, as well as allowing for rapid chamber changes between my three experimental setups. Below is a CAD render of the diffusion pump and baffle assembly with the adapter plates:
The adapter plates are made from 12"x12"x1" ATP-5 aluminum plate stock, which I will have custom machined to spec when I save up enough. The bottom plate has blind tapped holes on the bottom for the diffusion pump, and an o-ring groove to mate to the bottom of the 8" baffle. The upper plate will have a 6" conflat bolt pattern and knife edge machined into it for adapting to my 6" conflat chambers. Becuase the knife edge is aluminum, I will be using viton o-rings for this mating joint. Long 1/4"-20 bolts will be used through the assembly through 8 holes on the sides to secure it to the 8020 test stand. Below are the CAD renders for the two plates:
Finally a picture and CAD render of the baffle I am using. I obtained this on ebay last year for around $100, and it has been sitting in storage until now.
New thermal modeling has also been completed for the above assembly as well, which I will share some info and a project link to the project page in a following post, which includes data, analysis, discussion, and modeling files.
The adapter plates are made from 12"x12"x1" ATP-5 aluminum plate stock, which I will have custom machined to spec when I save up enough. The bottom plate has blind tapped holes on the bottom for the diffusion pump, and an o-ring groove to mate to the bottom of the 8" baffle. The upper plate will have a 6" conflat bolt pattern and knife edge machined into it for adapting to my 6" conflat chambers. Becuase the knife edge is aluminum, I will be using viton o-rings for this mating joint. Long 1/4"-20 bolts will be used through the assembly through 8 holes on the sides to secure it to the 8020 test stand. Below are the CAD renders for the two plates:
Finally a picture and CAD render of the baffle I am using. I obtained this on ebay last year for around $100, and it has been sitting in storage until now.
New thermal modeling has also been completed for the above assembly as well, which I will share some info and a project link to the project page in a following post, which includes data, analysis, discussion, and modeling files.