US 12,076,729 B2
Roller crusher and method for arrangement thereof
Vadim Reznitchenko, Mechanicsburg, PA (US); Keith Harbold, York, PA (US); and Brian Eric Behm, Red Lion, PA (US)
Assigned to Metso Outotec USA Inc., Brookfield, WI (US)
Filed by Metso Outotec USA Inc., Waukesha, WI (US)
Filed on Oct. 22, 2021, as Appl. No. 17/507,913.
Prior Publication US 2023/0127300 A1, Apr. 27, 2023
Int. Cl. B02C 4/40 (2006.01); B02C 4/02 (2006.01); B02C 4/28 (2006.01); B02C 4/30 (2006.01); B02C 4/32 (2006.01)
CPC B02C 4/40 (2013.01) [B02C 4/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A roller crusher having two parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap that is adjustable by movement of the two rollers toward and away from each other, each roller having two ends, the roller crusher comprising:
a flange attached to at least one of the ends of one of the rollers,
the flange extending in a radial direction of the roller,
the flange having a height (H) above an outer surface of the roller, and
a movement blocking arrangement structured and arranged to limit the gap between the rollers to a minimum gap of at least 45 mm,
wherein the roller crusher further comprises at least one scraper positioned at an end of the roller with the flange, and wherein the scraper is positioned such that a minimum roller surface distance between each scraping surface of the at least one scraper and the outer surface of the roller is within the range of 70% to 100% of the minimum gap, such that, when the roller crusher is in operation, the at least one scraper is allowed to partially wear down and thereby reduce in size at a magnitude being up to 30% of the minimum gap, thereby extending an individual wear life the at least one scraper.
 
17. A method for arrangement of a roller crusher, which roller crusher has two parallel rollers arranged to rotate in opposite directions, towards each other, and separated by a gap that is adjustable by movement of the two rollers toward and away from each other, each roller having two ends, the roller crusher comprising:
a flange attached to at least one of the ends of one of the rollers,
the flange extending in a radial direction of the roller,
the flange having a height (H) above an outer surface of the roller, and
a movement blocking arrangement structured and arranged to limit the gap between the rollers to a predetermined minimum gap, wherein the method comprises:
positioning at least one scraper at an end of the roller with the flange such that a minimum roller surface distance between each scraper surface of the at least one scraper and the outer surface of the roller is within the range of 70% to 100% of the minimum gap, such that, when the roller crusher is in operation, the at least one scraper is allowed to partially wear down and thereby reduce in size at a magnitude being up to 30% of the minimum gap, thereby extending an individual wear life the at least one scraper.