Abstract: A relief spring stop bolt assembly for shallow bowl coal pulverizing mills and a method of using the same to smooth operation of such a pulverizer during low load operation is described. The subject relief spring stop bolt assembly is sized to be used with or for “retrofit” within existing journal space and existing journal opening cover space of a shallow bowl mill to effectively smooth rough operating conditions.

Abstract: A relief spring stop bolt assembly for shallow bowl coal pulverizing mills and a method of using the same to smooth operation of such a pulverizer during low load operation is described. The subject relief spring stop bolt assembly is sized to be used with or for “retrofit” within existing journal space and existing journal opening cover space of a shallow bowl mill to effectively smooth rough operating conditions.

Abstract: A pulverizer 60 includes a spring assembly 10 that urges a grinding roller 72 of a journal assembly 68 onto a grinding surface 66 of a grinding table 64. The force applied is monitored by a load cell 32 located within spring assembly 10 that creates an electronic signal. A controller 83 receives the electronic signal and stores and/or displays it and alternatively acts to adjust the applied force to a desired value. Alternatively, adjustable forces or mechanical dampening may be applied to journal assembly 68 by controller 83. Alternatively, additional sensors may measure displacement of the journal assembly and rotation of the grinding table for other calculations.

Abstract: A pulverizer 60 includes a spring assembly 10 that urges a grinding roller 72 of a journal assembly 68 onto a grinding surface 66 of a grinding table 64. The force applied is monitored by a load cell 32 located within spring assembly 10 that creates an electronic signal. A controller 83 receives the electronic signal and stores and/or displays it and alternatively acts to adjust the applied force to a desired value. Alternatively, adjustable forces or mechanical dampening may be applied to journal assembly 68 by controller 83. Alternatively, additional sensors may measure displacement of the journal assembly and rotation of the grinding table for other calculations.

Abstract: A primary classifier (300) particularly suited for use in a bowl mill (10) of the type that is employed for purposes of effecting the pulverization of materials such as coal is provided by the present invention. The primary classifier (300) includes a vane wheel portion (360) affixed to the periphery of the rotatable grinding surface (14) of the bowl mill (10) so as to extend circumferentially around the entire interior of the substantially closed separator body (12) of the bowl mill (10). The primary classifier (300) further includes a low profile deflector portion (380) mounted within the interior of the substantially closed separator body (12) of the bowl mill (10) in closely spaced relation to the circumference of the rotatable grinding surface (14) at an elevation below the elevation of the grinding journal openings (205) and so as to extend continuously without interruption about the entire interior of the substantially closed separator body (12) of the bowl mill (10).

Abstract: A primary classifier (300) particularly suited for use in a bowl mill (10) of the type that is employed for purposes of effecting the pulverization of materials such as coal is provided by the present invention. The primary classifier (300) includes a vane wheel portion (360) affixed to the periphery of the rotatable grinding surface (14) of the bowl mill (10) so as to extend circumferentially around the entire interior of the substantially closed separator body (12) of the bowl mill (10). The primary classifier (300) further includes a low profile deflector portion (380) mounted within the interior of the substantially closed separator body (12) of the bowl mill (10) in closely spaced relation to the circumference of the rotatable grinding surface (14) at an elevation below the elevation of the grinding journal openings (205) and so as to extend continuously without interruption about the entire interior of the substantially closed separator body (12) of the bowl mill (10).