Conveyor belt idler systems

摘要

Belt conveyor idler systems for increasing the trough angle of a conveyor belt are disclosed. In some embodiments, wing roll brackets that support the wing rolls increase in length from the front end to the back end of the idler system.

主权项

1. An idler system for increasing the trough angle of a conveyor belt, the idler system comprising:
at least three conveyor belt idlers for supporting the conveyor belt, the system having a front end and a back end and a central axis that extends through the conveyor belt idlers from the front end to the back end, each conveyor belt idler comprising:
a first wing roll having an outer end and an inner end;a second wing roll having an outer end and an inner end;a center roll between the first wing roll and the second wing roll, the first wing roll and second wing roll being angled downward toward the center roll, the first and second wing rolls and center roll each having an axis of rotation, the axis of rotation of the first and second wing rolls being offset from the axis of rotation of the center roll along the central axis;a frame for supporting the first wing roll, second wing roll and center roll;a first outer bracket connected to the frame and to the first wing roll at its outer end, there being a vertical distance from the frame to the connection between the first wing roll and the first outer bracket;a second outer bracket connected to the frame and the second wing roll at its outer end, there being a vertical distance from the frame to the connection between the second wing roll and the second outer bracket, wherein the vertical distance from the frame to the connection between the first wing roll and the first outer bracket and the vertical distance from the frame to the connection between the second wing roll and the second outer bracket increases from the front end of the system to the back end of the system;wherein the first and second wing rolls and center roll of each idler each have an upper surface, the first and second wing rolls angling downward toward the center roll such that a portion of the upper surfaces of the first and second rolls pass below the upper surface of the center roll at a first and second vertical intersection point, the portion of the upper surface of the center roll between the first and second intersection points being a belt-engaging surface having a width, the width of the belt-engaging surfaces of the center rolls decreasing from the front end of the system to the back end of the system.