Rolls Frictionally Driven And Supported By Relatively Moving Surfaces (e.g., Ball Chasers) Patents (Class 241/103)
  • Patent number: 9468930
    Abstract: A rotatable throat assembly for a coal pulverizer which includes a plurality of throat segments secured to a ring seat in the pulverizer, a plurality of ledge cover segments on the throat segments, and a plurality of air seal segments secured on top of the ledge cover segments wherein the air seal segments each includes a layer of flexible, durable, high temperature-resistant polymer/rubber material projecting to within close proximity to the inner wall of the pulverizer to substantially block air flow between the rotatable throat assembly and the inner wall of the pulverizer.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: October 18, 2016
    Assignee: Techinomics, Inc.
    Inventor: Bruce N Alfee
  • Patent number: 7832665
    Abstract: A tension adjustment gauge system and method for a ball and ring coal pulverizer is provided that includes a housing, a stationary top grinding ring within the housing, a rotating lower grinding ring within the housing, a plurality of grinding balls between the top grinding ring and the lower grinding ring, an adjustable loading system for applying a compressive force exerted on the top grinding ring and grinding balls against the lower grinding ring. The adjustable loading system includes a single hydraulic assembly mounted on the upper portion of the housing, a gauge mounted to the hydraulic assembly for determining linear movement of a piston of the hydraulic assembly, a plurality of threaded rods mounted to the upper portion of the housing capable of being manually adjusted. The movement of the piston corresponds to an equal distance of movement of a spring gap between an upper and lower portion of the compression spring, such that the gauge indicates the change in the spring gap by moving the piston.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: November 16, 2010
    Assignee: Dominion Resources, Inc.
    Inventor: Richard Buonfiglio
  • Publication number: 20090084875
    Abstract: A tension adjustment gauge system and method for a ball and ring coal pulverizer is provided that includes a housing, a stationary top grinding ring within the housing, a rotating lower grinding ring within the housing, a plurality of grinding balls between the top grinding ring and the lower grinding ring, an adjustable loading system for applying a compressive force exerted on the top grinding ring and grinding balls against the lower grinding ring. The adjustable loading system includes a single hydraulic assembly mounted on the upper portion of the housing, a gauge mounted to the hydraulic assembly for determining linear movement of a piston of the hydraulic assembly, a plurality of threaded rods mounted to the upper portion of the housing capable of being manually adjusted. The movement of the piston corresponds to an equal distance of movement of a spring gap between an upper and lower portion of the compression spring, such that the gauge indicates the change in the spring gap by moving the piston.
    Type: Application
    Filed: September 25, 2008
    Publication date: April 2, 2009
    Inventor: Richard BUONFIGLIO
  • Publication number: 20080017738
    Abstract: A main shaft and method for installing a main shaft for a pulverizer are provided herein. The main shaft includes at least a first tapered portion for accepting a yoke and a first associated threaded portion for securing the yoke to the main shaft. Also included is a second tapered portion for accepting a bevel gear assembly and a second associated threaded portion for securing the bevel gear assembly to the main shaft.
    Type: Application
    Filed: July 24, 2006
    Publication date: January 24, 2008
    Applicant: ALSTOM Technology Ltd
    Inventor: Richard P. Ortlepp
  • Patent number: 6874715
    Abstract: Improvements in EL type pulverizers provide for longer wear life and reduced incidences of parts failures include: deep-dish contour grinding rings, tight tolerance ball tracks, heavy-duty top grinding ring flukes, larger diameter grinding balls, and an improved all-metal, integral snubber design for limiting the horizontal movement of the top grinding ring in order to increase the useful life of the pulverizer elements.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: April 5, 2005
    Assignee: The Babcock & Wilcox Company
    Inventors: Noel S. Moen, Andrew E. Jackson, Jeffrey C. Pugh
  • Patent number: 6783091
    Abstract: A pulverizer housing liner for the housing unit of an EL pulverizer is made up of an arcuate liner body having an inner curved surface forming a segment of the circular housing unit and two circumferentially spaced flutes fixed to the inner surface.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: August 31, 2004
    Assignee: The Babcock & Wilcox Company
    Inventor: Craig S. Whaley
  • Patent number: 6609669
    Abstract: An hydraulic loading assembly for ball and ring coal pulverizers has a plurality of compression assemblies connected to a common hydraulic controller for exerting equal pressure simultaneously on each of the compression assemblies. The compression assemblies each have a hydraulic cylinder and piston located above and connected to a non-threaded rod which is in turn located above and connected to a compression spring exerting force on the top grinding ring of the pulverizer.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: August 26, 2003
    Assignee: The Babcock & Wilcox Company
    Inventors: Michael E. Rakocy, Rodney C. Pifer, David P. Houser
  • Patent number: 6003439
    Abstract: A metallic flake manufacturing device uses a bearing to form the flakes. The bearing is located within a container which receives a fluid having suspended metallic particles. The bearing has an outer race, an inner race, and a plurality of bearings disposed between the races. The bearings are immersed in the fluid for flattening the suspended particles into flakes. A shaft extends into the container. The shaft engages one of the races for rotating it relative to the other race.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: December 21, 1999
    Assignee: Lockheed Martin Corporation
    Inventors: Robert Alois Knezek, James Clinton Couchman, Russell Guy Torti
  • Patent number: 5899394
    Abstract: A method for grinding of material in a ring roller mill having at least one grinding ring, at least one roller fitted in the grinding ring and at least one unit fitted between the roller and the grinding ring. The method includes the steps of operating the mill at a subcritical speed and at a grinding pressure above 40 MPa, placing the unit in the path where compacted material is released from the ring at a certain distance from a point P, which is the point on the ring where the material is released, in such a way that the unit is hit by agglomerates formed during operation at an angle between 60.degree. and 120.degree., said angle being between the surface of the unit and the direction of incidence of the material, after the latter is released from the grinding ring, and that the loosened material is distributed over the draw-in-zone in front of the roller and over the roller.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: May 4, 1999
    Assignee: F. L. Smidth & Co. A/S
    Inventor: Jan Folsberg
  • Patent number: 5868186
    Abstract: This invention relates to a wood chip recovery system which removes bark from roundwood or wood chips. It is desirable for such structures of this type to recover the wood chips from the bark without introducing contaminants, such as metal ions like iron, into the debarked roundwood or wood chips.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: February 9, 1999
    Assignee: Westvaco Corporation
    Inventors: David Dwight Mulligan, John Rolfe Hite Martin
  • Patent number: 4874135
    Abstract: In the vertically oriented generally cylindrical coal pulverizers that are widely employed to supply a coal-air dispersion to the combustion zones of boilers producing steam for the turbines of electric-power plants, forced-air requirements are reduced and coal fall-back and resultant coal fires are substantially eliminated by the novel throat ring of invention. A throat ring surrounds circumferentially the coal grinding assembly of each such pulverizer and contains a plurality of angularly disposed air channels through which air is forced upwardly into contact with pulverized coal thrust centrifugally from the said assembly causing the coal-air mixture to swirl upwardly to means directing the mixture to the said combustion zones.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: October 17, 1989
    Inventor: Robert S. Provost
  • Patent number: 4721258
    Abstract: A roll-and-race pulverizer is disclosed in which the throat vanes are mounted for rotation in the direction of rotation of the grinding ring.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: January 26, 1988
    Assignee: The Babcock & Wilcox Company
    Inventors: Donald R. Dougan, Gerald W. Peters, William C. Kish
  • Patent number: 4687145
    Abstract: A roll-and-race pulverizer is disclosed in which the throat vanes are mounted for rotation in the direction of rotation of the grinding ring.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: August 18, 1987
    Assignee: The Babcock & Wilcox Company
    Inventors: Donald R. Dougan, Gerald W. Peters, William C. Kish
  • Patent number: 4264041
    Abstract: A new and improved design of a pulverizer air throat for low-pressure drop, reduced erosion and improved flow distribution.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: April 28, 1981
    Assignee: The Babcock & Wilcox Co.
    Inventors: John B. Kitto, Jr., Edwin Kowalski
  • Patent number: 4240586
    Abstract: Friable particulate material is crushed and classified by apparatus comprising a grinder apparatus operatively positioned in the hollow interior of a relative rotationally mounted container. The grinder apparatus preferably comprises three rotationally mounted cone wheel roller members, each of which includes an outer grinding surface of predetermined contour. The outer grinding surface of each of the roller members maintains substantial conformance with a grinding face of the cylinder container from a center area to an outer edge of the grinding face as the roller members rotate. Feed particles of friable material and a continuous supply of fluid are introduced into the container and diffused substantially over the whole grinding face. Once the feed particles have been crushed to a predetermined size, the crushed particles are carried away from the grinding face by the flow of fluid exiting the hollow interior.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: December 23, 1980
    Inventor: Robert F. Evans
  • Patent number: 4153209
    Abstract: A grinder for material wherein a series of hollow balls is entrained for rotational movement between an upper ring and a lower ring, the rings being relatively rotatable about a control axis, and the balls being rotatable between the rings, and the material for grinding being fed into a zone between the balls and rings. The contact zone between the upper ring and each ball is defined by two annular lips and is substantially less than the contact zone between the lower ring and each ball.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: May 8, 1979
    Assignee: Babcock and Wilcox of Africa
    Inventor: Donald S. Fraser
  • Patent number: 4049203
    Abstract: A coal slurry drier which comprises a pulverizer having a housing enclosing a pulverizing zone including horizontally disposed upper and lower grinding rings. A circular row of rotatable grinding elements is positioned between the upper and lower rings. Heated carrier air is passed through the pulverizing zone. A conduit delivers the coal slurry to the pulverizer for drying and pulverization. The conduit includes an insulated portion extending through the housing and has its outlet located within the pulverizing zone.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: September 20, 1977
    Assignee: Babcock & Wilcox, Limited
    Inventor: Edwin Charles McKenzie