Screw conveyor - Details needed

(not verified)

Dear Sir,

We need your assistance for the below points.

Drawing details:

Screw conveyor Length : 7500 mm, Pitch 300mm , Screw Dia: 300 mm,Flight thickness : 3 mm,Capacity :11tons/hr M.O.C: Mild steel

1. What should be the shaft diameter to be selected to have a pitch of 300mm.

2. What should be the bore to be made on the flights to have a pitch of 300mm.

3. In the drawing they have given the screw dia as 300 mm.Is it the final screw dia after swirling or srew dia before swirling.

Awaiting your reply,

Re: Screw Conveyor - Details Needed

Posted on 11. Feb. 2008 - 10:31

In screw conveyors

the length is normally defined as EITHER:

the dimension between the end plates OR

the dimension between the centrelines of the inlet and outlet

the size of the screw conveyor is normally defined as:

the outside diameter of the finished scroll

the tube on which the finished scroll is mounted is according to the application and manufacturers standards.

If you are making a scroll by cutting sections from flat plate then this is simple geometry based on FINISHED outside diameter, inside diameter and pitch. (Forming into the correct shape is another matter!!)