Re: Speed & Stroke Of A Linear Motion Vibrating Screen
A little more info about the composition:
The slurry composition is 50% solids by weight, mixed with water. Solids specific gravity is 3.5 and the maximum flow rate is 1,000tph of solids, equating to 1,290m3/hr of slurry. ■
Re: Speed & Stroke Of A Linear Motion Vibrating Screen
Not sure why you would want to reinvent the wheel when there are so many reputable screen manufacturers out there that will do exactly what you are looking for. You are in for a very major challenge. Good luck. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re: Speed & Stroke Of A Linear Motion Vibrating Screen
I guess all I'm really asking is, "Can the chart in the handbook be used in my application?" Or is the wet, heavy slurry just too different, and if so, in which direction should I be heading (i.e more stroke/lower revs for the heavier substance)
Re-inventing the wheel is the kiwi way 
■
Re: Speed & Stroke Of A Linear Motion Vibrating Screen
Lets give this a whirl: the VSMA tables are more ideally designed for dry free flowing screening but, in fact do have mathematical formula to allow for wet, non free flowing, hard to screen factors also...but, here we kinda as with everytime with utilize the formula must apply FIELD KNOWLEDGE or general knowledge from experience to guide.
with the info you have given: your screen deck is nominal: 7' x 16' at 5 deg decline with linear motion exciters.
Are the exciters INVICTA MOTORS bolted on each side or over the top? or shafts geared together style?
SPEED STROKE SLOPE: for now, slope is a start point at 5 degrees, speed should be in the 675-875 rpm range and we would kinda want to STROKE the material at plus minus 1/2" long stroke for a trial. this theoretically should keep the operating G's in a NON BREAKING design range. have you tried to start this baby up yet or no?
all for now. also agree with my buddy Gary B comment not, to waste a lot of time and re-invent the wheel as you could easily burn up a lot of time, money and energy and still not have a working screener. for this material to screen it is imperative we spread the material across the full width and try very hard to keep the BED DEPTH DOWN so it can attempt to lift the JUNK up while the -5mm passes. Probably would use spray bars here also to help push the tonnage thru the deck openings.
George Baker Moderator
QUOTE=JeffD;78852]I'm currently working on a vibrating screen design and could do with a little bit of help with specifying the appropriate speed & slope.
The application is screening trash (sticks, roots etc) from an iron sand slurry down to a size of 5mm.
The screen bed is about 4.8m x 2.1m with a downward slope of 5degrees. We will be using linear motion exciters.
I have had a look at the tables in the VSMA handbook but don't know how well they apply to a wet slurry.
Thanks for your help.
Jeff[/QUOTE] ■
Vsma Charts Comment.
THE VSMA charts are a GUIDELINE only from imperical historical data from 7 major vibrating screen manufacturers years of applying screens into many different apps. the charts are NOT AN ABSOLUTE black and white answer but, shades of grey to be moulded by experience actually.
Originally Posted by George Baker
with the info you have given: your screen deck is nominal: 7' x 16' at 5 deg decline with linear motion exciters.
Are the exciters INVICTA MOTORS bolted on each side or over the top? or shafts geared together style?
SPEED STROKE SLOPE: for now, slope is a start point at 5 degrees, speed should be in the 675-875 rpm range and we would kinda want to STROKE the material at plus minus 1/2" long stroke for a trial. this theoretically should keep the operating G's in a NON BREAKING design range. have you tried to start this baby up yet or no?
all for now. also agree with my buddy Gary B comment not, to waste a lot of time and re-invent the wheel as you could easily burn up a lot of time, money and energy and still not have a working screener. for this material to screen it is imperative we spread the material across the full width and try very hard to keep the BED DEPTH DOWN so it can attempt to lift the JUNK up while the -5mm passes. Probably would use spray bars here also to help push the tonnage thru the deck openings.
George Baker Moderator
QUOTE=JeffD;78852]I'm currently working on a vibrating screen design and could do with a little bit of help with specifying the appropriate speed & slope.
The application is screening trash (sticks, roots etc) from an iron sand slurry down to a size of 5mm.
The screen bed is about 4.8m x 2.1m with a downward slope of 5degrees. We will be using linear motion exciters.
I have had a look at the tables in the VSMA handbook but don't know how well they apply to a wet slurry.
Thanks for your help.
Jeff
[/QUOTE] ■
Speed & Stroke of a Linear Motion Vibrating Screen
I'm currently working on a vibrating screen design and could do with a little bit of help with specifying the appropriate speed & slope.
The application is screening trash (sticks, roots etc) from an iron sand slurry down to a size of 5mm.
The screen bed is about 4.8m x 2.1m with a downward slope of 5degrees. We will be using linear motion exciters.
I have had a look at the tables in the VSMA handbook but don't know how well they apply to a wet slurry.
Thanks for your help.
Jeff ■