Belt Scraper Tensioning
Dear Mr. Harikrishnan R,
to your general question there's a very broad general answer, which is provided by a U.S. Bureau of Mines study (court. of M E): Blade-to-belt pressure should be within 76 to 97 kPa.
Over- and undertensioning have more or less severe negative effects on equipment and cleaning efficiency.
Besides pressure, the material conveyed, the belt, the angle of contact, the cleanliness requirements and of course wear effects are of importance, the list to be continued ~ real life.
If I could invite you to scan reputed manufacturers for their input, you will find a rich source of information.
The point is, that many applications have their specificalities and require an adapted approach re knowledge from experience.
Thus I come back to the reputed manufacturers, which will upon consultation specify the correct utilization of their respective equipment if you are an operator, or might support you with information if you are just investigating the subject.
Regards
R. ■
Re: Belt Cleaner Tension
Nice to see the US Bureau of Mines using real world units!
However the answer to your question is No. Water is the source of trouble. Plenty of cleaners can be set to remove most of the dry debris but introduce a moderate amount of water and the performance of the cleaner is compromised. Spring loaded cleaners are unlikely to offer an adequate adjustment throughout the life of the product batch.
Belt cleaning is the most important aspect of conveying. If the power calculations and beltline geometry etc. are all perfect it all falls apart if the spillage and cleaning are not fully addressed. Belt cleaning is an art and therefore not subject to standards. Suppliers have their data banks and these are your best feedback.
If you can afford washing go for it. You have to balance the cost of washing against belt life.
When it rains in Saudi Arabia, as it does most years, the situation is as messy as in any place where belt cleaning gets treated as an unwanted expense. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Belt Cleaner Tension
Dear Sirs,
Could any one throw some light on what is the optimum pressure (blade to belt pressure) required for a belt cleaner to perform efficiently. Is there any standard specifying the pressure exerted by the cleaner blade on the conveyor belt.
Regards,
Harikrishnan R ■