Angle-based method and device for protecting a rotating component
OwnerEhrenfried Albert Tirschlerinventor
Life of this patent
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Abstract
A method and device to protect a grinding mill used for grinding material therein by rotating the drum so that the material adheres to the drum inner surface and rises therewith over a cascading angle from a gravity-balanced condition prior to detach by gravity from the inner surface and tumble into a cascading flow. The method is used for protecting the grinding mill from damages potentially resulting from the material agglomerating into a generally solidified lumped volume that could adhere to the inner surface and rotate with the latter more than the cascading angle to a fail angle wherein the lumped volume may detach from the drum inner surface and impact an impact position within the drum.
Claims18
A method for protecting a grinding mill, at startup from a gravity-balanced condition thereof, including a rotatable mill drum used for grinding material from damages potentially caused by a lumped volume of said material falling from a fall position within said mill drum and impacting an impact position within said mill drum upon rotation thereof at startup from the gravity-balanced condition, said mill drum being coupled to a torque provider able to generate a driving torque for rotating said mill drum, said method comprising the steps of:
- assessing a presence of a potentially damaging lumped volume of said material in said mill drum by evaluating if said material within said mill drum is tumbling in a cascading flow upon rotation of said mill drum at startup from the gravity-balanced condition;
- initiating an action for stopping the rotation of said mill drum upon determination that said material within said mill drum is not tumbling in said cascading flow under the presence of said potentially damaging lumped volume of said material.
A method for protecting a grinding mill at startup from a gravity-balanced condition thereof, said grinding mill including a rotatable mill drum defining a drum inner surface and being coupled to a torque provider able to generate a driving torque for rotating said mill drum, said grinding mill being used for grinding material by rotating said mill drum so that said material adhering to said drum inner surface rises therewith over a cascading angular displacement range from Startup at the gravity-balanced condition prior to being detached by gravity from said drum inner surface and tumbling into a cascading flow, said method being used for protecting said grinding mill from damages potentially resulting from said material agglomerating into a generally solidified lumped volume that could adhere to said drum inner surface and rotate with the latter from said gravity-balanced condition more than said cascading angular displacement range to a fall angular displacement wherein said lumped volume may detach from said drum inner surface and impact an impact position within said mill drum, said method comprising the steps of:
- assessing for a presence of material adhering to said drum inner surface upon rotation of said mill drum by more than said cascading angular displacement range from a startup position corresponding to said gravity-balanced condition;
- initiating an action for stopping the rotation of said mill drum upon determination of material adhering to said drum inner surface upon rotation of said mill drum by more than said cascading angular displacement range from said gravity-balanced condition under the presence of said material adhering to said drum inner surface.
Dependencies are inferred from the claim text.