System, method and apparatus for upgrading a pulverizer

Patent metadata

Field	Value
Publication number	US-11117136-B2
Application number	US-201916668334-A
Country	US
Kind code	B2
Filing date	Oct 30, 2019
Priority date	Jun 21, 2016
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A method of upgrading a vertical spindle pulverizer includes the steps of removing a cover from a journal opening in a housing of the pulverizer to access a grinding zone of the pulverizer, removing a first journal assembly having a toroidal grinding roll from the pulverizer through the journal opening, removing a plurality of toroidal table segments from a grinding table of the pulverizer, installing a plurality of inclined bull ring segments on the grinding table, installing a second journal assembly having a conical grinding roll in the pulverizer, and replacing the cover over the journal opening. The inclined bull ring segments are configured to register with a grinding surface of the conical grinding roll.

First claim

What is claimed is:

1. A vertical spindle pulverizer, comprising:
a housing having a shaft coupled for rotation therein;
a grinding table rotatably mounted on the shaft, the grinding table having a plurality of flat bull ring-shaped segments on the grinding table;
a journal assembly pivotally mounted on the housing, wherein the journal assembly is pivotally mounted on the housing via two opposed pivot shaft segments that do not extend a length of a pivot bracket and are accessible from outside of the housing; and
a conical-shaped grinding roll coupled to the journal assembly.

2. A vertical spindle pulverizer, comprising:
a housing having a shaft coupled for rotation therein;
a grinding table rotatably mounted on the shaft, the grinding table having a plurality of inclined bull ring segments;
a journal assembly pivotally mounted on the housing, wherein the journal assembly is pivotally mounted on the housing via two opposed pivot shaft segments that do not extend a length of a pivot bracket and are accessible from outside of the housing; and
a conical-shaped grinding roll coupled to the journal assembly;
wherein the journal assembly and grinding roll are retrofit into the pulverizer in place of an existing journal assembly having a toroidal-shaped grinding roll.

3. A vertical spindle pulverizer, comprising:
a housing having a shaft coupled for rotation therein;
a grinding table rotatably mounted on the shaft, the grinding table having a plurality of flat bull ring-shaped segments that have been retrofit onto the grinding table in place of toroidal-shaped table segments;
a journal assembly pivotally mounted on the housing, wherein the journal assembly is pivotally mounted on the housing via two opposed pivot shaft segments that do not extend a length of a pivot bracket and are accessible from outside of the housing; and
a conical-shaped grinding roll coupled to the journal assembly;
wherein the journal assembly and grinding roll are retrofit into the pulverizer in place of an existing journal assembly having a toroidal-shaped grinding roll.

Assignees

• General Electric Technology Gmbh

Inventors

• Colson Paul M
• Crafts Douglas W

Classifications

• B02C15/004 Primary

  Shape or construction of rollers or balls · CPC title

• B02C15/003 Primary

  Shape or construction of discs or rings · CPC title

• B02C15/04

  Mills with pressed pendularly-mounted rollers, e.g. spring pressed · CPC title