US3790095A - Pulverizer with satellite spacer assembly - Google Patents

Pulverizer with satellite spacer assembly Download PDF

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Publication number
US3790095A
US3790095A US00248707A US3790095DA US3790095A US 3790095 A US3790095 A US 3790095A US 00248707 A US00248707 A US 00248707A US 3790095D A US3790095D A US 3790095DA US 3790095 A US3790095 A US 3790095A
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United States
Prior art keywords
rollers
shafts
center yoke
comminuted particles
pulverizer
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00248707A
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English (en)
Inventor
R Gillette
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Individual
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Individual
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Publication date
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Publication of US3790095A publication Critical patent/US3790095A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/007—Mills with rollers pressed against a rotary horizontal disc

Definitions

  • the satellite spacer of the present invention has only one major wear part, which is the spherical bearing block that can easily be removed for replacement purposes. Also, there is less frictional drag on the pulverizer rollers by providing a satellite spacer having individual shafts for rotatably mounting the rollers.
  • a still further advantage is achieved 'by inhibiting grinding roller yaw or the swing about the vertical axis of the pulverizer.
  • the instant invention also results in better capacity for the pulverizer through better air flow by removal of the center obstructions. This better air flow lowers the retention time of particles on the grinding table thereby alleviating one of the major causes of pulverizer skidding.
  • a plurality of rollers are mounted for rotationabout their respective axes and each of the rollers has a peripheral grinding face maintained incontact with the grinding surface, and a thrust ring is mounted in contact with the rollers.
  • a spacer center yoke Positioned above the-table is a spacer center yoke fixed to the center yoke which radially extend outwardly for supporting the center yoke and rotatably mounting the rollers. In this manner, the rollers are separated from each other and are prevented from skidding.
  • FIG. 1 is a front sectional view of a portion of a pulverizing apparatus embodying features of the present invention
  • FIG. 2 is an enlarged sectional view of part of the satellite spacer assembly, showing an enlarged portion of the spacer hub; and I FIG. 3 is an enlargedplan view of the rollers and satellite spacer assembly to better show the mounting arrangement .for the pulverizer rollers.
  • a pulverizing apparatus which is generally designated by the reference numeral 10.
  • the pulverizing apparatus 10 includes a steel housing 12 which is mounted at groundlevel for enclosing a rotatably mounted grinding unit 14.
  • Raw coal feed stock is introduced into the housing 12 through a conduit system 16 which is generally positioned above the grinding unit 14.
  • the grinding unit14 includes a table 20 on which there is mounted aremovable grinding ring 22 formed with an annular groove 24.
  • the table 20 is mounted for rotation on a support shaft25 and is powered by an electric motor which has not been shown in the drawings forthe sake of simplicity.
  • a plurality of spaced-apart pulverizingg rollers 26, preferably three in number, are mounted for' rotation about their respective axes.
  • Each of the rollers 26 has a peripheral grinding face which is maintained in contact with the outer grinding surface of annular groove 24.
  • the rollers 26 are also formed with a bearing collar 30 which has an annular groove 32.
  • a thrust ring 34 is mounted in housing 12 above the pulverizing rollers 26, and load is applied by means of compression springs 36.
  • the thrust ring 34 is integrally formed with an annular lip 38 which is configurated in accordance with the outer periphery of annular groove 32 in order to achieve smooth mating contact.
  • a satellite spacer assembly 40 is positioned above they grinding ring 22 by means of radially extending shafts 42 on which the rollers 26 are rotatably mounted.
  • the satellite spacer assembly 40 includes an annular yoke section 44 having vertically oriented supports 46 which are integrally fomied with a horizontally positioned support ring plate 48.
  • yoke section 44 is formed with through bores 50 for receiving the shafts 42 which are maintained in a fixed position by the welds 52 and gusset plates '54.
  • the yoke section 44 is formed with a frus- 3 toconical configuration for the purpose of mounting the shafts 42 at an acute angle to the vertical, central axis of the yoke section 44. Also, this frustoconical configuration allows for the location of the supports 46 and 48 along the innersurface of the yoke section 44 for improved structural strength, as well as minimizing the obstructions in the center of the pulverizing apparatus 10, thereby obtaining a more efficient flow of pulverized coal and air.
  • the outer end of shaft 42 is formed with a reduced diameter section 60 which is integrally formed with stepped-down threaded end section 62.
  • the reduced diameter section 60 is provided with a pair of outer keyway slots 64, and each of the outer keyway slots 64 is positioned approximately 180 degrees apart along the circumference of shaft 42.
  • a spherical bearing block 66 having an internal central bore 68, is formed with a pair of inner keyway slots 70 for mounting bearing block 66 on shaft 42, such that the inner keyway slots 70 overlie the outer keyway slots 64 in a coextensive position.
  • a pair of key bars 72 can be mounted in the outer keyway slots 64, and the inner keyway slots 70 can be slid along the key bars 72 for mounting the bearing block 66 on shaft 42.
  • the bearing block 66 is axially positioned along shaft 42 by means of a shim washer 74, and is secured with a thrust washer 76 which is compressed by a threaded nut 78 that is screwed onto the end section 62.
  • Each of the pulverizer rollers 26 is fabricated with an internal central bearing surface 80 for receiving each of the bearing blocks 66, such that the satellite spacer assembly 40 is supported on the rollers 26 which are in turn rotatably mounted on the shafts 42.
  • central bearing surface 80 is oversized, such that the bearing block 66 can be freely mounted in the bearing surface 80.
  • the bearing block 66 can easily be removed for the purpose of replacement as well as reversing the bearing block 66, such that the outer end of bearing block 66 contacts the shim washer 74. This reversing procedure increases the life of the bearing block through obtaining uniform wear.
  • the satellite spacer assembly 40 affords a means for supporting the shafts 42 on which the rollers 26 are rotatably mounted. In this manner, rollers 26'are separated from each other and are centrally guided around the annular groove 24.
  • the satellite spacer assembly 40 thereby provides superior guidance for the rollers 26 with minimum drag, which accounts for reduced yaw of the rollers 26 about the shafts 42, as well as. reduced 4 skidding of the rollers 26.
  • Apparatus for pulverizing material into comminuted particles comprising a housing, a table having a grinding surface mounted in said housing for rotation,
  • Apparatus for pulverizing material into comminuted particles according to claim 1, in which said annulus is formed with a frustoconical configuration such that said shafts are capable of being mounted at an acute angle to the vertical axis of said center yoke.
  • Apparatus for pulverizing material into comminuted particles in which the ends of said shafts are formed with a reduced diameter section, external threads are formed on the outer extremity of said reduced diameter sections, and internally threaded nuts are threadably engaged with said external threads for removably securing said bearing means to said shafts.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US00248707A 1972-04-28 1972-04-28 Pulverizer with satellite spacer assembly Expired - Lifetime US3790095A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24870772A 1972-04-28 1972-04-28

Publications (1)

Publication Number Publication Date
US3790095A true US3790095A (en) 1974-02-05

Family

ID=22940324

Family Applications (1)

Application Number Title Priority Date Filing Date
US00248707A Expired - Lifetime US3790095A (en) 1972-04-28 1972-04-28 Pulverizer with satellite spacer assembly

Country Status (9)

Country Link
US (1) US3790095A (enExample)
JP (1) JPS4917554A (enExample)
BR (1) BR7303079D0 (enExample)
CA (1) CA965068A (enExample)
DE (1) DE2230359A1 (enExample)
ES (1) ES404022A1 (enExample)
FR (1) FR2186847A5 (enExample)
GB (1) GB1397934A (enExample)
IT (1) IT980351B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606506A (en) * 1984-05-04 1986-08-19 Kawasaki Jukogyo Kabushiki Kaisha Vertical type roller mill
US5050810A (en) * 1990-01-16 1991-09-24 Parham Robert L One-piece pulverizing roller
US20110120725A1 (en) * 2008-06-13 2011-05-26 Downton Geoffrey C Wellbore instruments using magnetic motion converters
US20240149271A1 (en) * 2021-03-09 2024-05-09 Moviator Oy Apparatus and method for grinding lumpy material

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494611A (en) * 1982-02-11 1985-01-22 Alvarez Guillermo D Apparatus for processing soil for planting
JPS60228938A (ja) * 1984-04-27 1985-11-14 Kiyoshi Takahashi 静電容量型摩擦力検出器
JPS614548A (ja) * 1984-06-16 1986-01-10 川崎重工業株式会社 竪型ミル
JP2672575B2 (ja) * 1988-06-06 1997-11-05 バブコツク日立株式会社 粉砕性試験装置
CN107552162B (zh) * 2017-09-19 2022-11-01 佛山科学技术学院 一种陶瓷原料粉磨设备的辊轮装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366338A (en) * 1965-12-07 1968-01-30 Foster Wheeler Corp Segment-type grinding ring
US3658264A (en) * 1969-11-15 1972-04-25 Pfeiffer Barbarossawerke Ag Fa Roller mill drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366338A (en) * 1965-12-07 1968-01-30 Foster Wheeler Corp Segment-type grinding ring
US3658264A (en) * 1969-11-15 1972-04-25 Pfeiffer Barbarossawerke Ag Fa Roller mill drive

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4606506A (en) * 1984-05-04 1986-08-19 Kawasaki Jukogyo Kabushiki Kaisha Vertical type roller mill
US5050810A (en) * 1990-01-16 1991-09-24 Parham Robert L One-piece pulverizing roller
US20110120725A1 (en) * 2008-06-13 2011-05-26 Downton Geoffrey C Wellbore instruments using magnetic motion converters
US20240149271A1 (en) * 2021-03-09 2024-05-09 Moviator Oy Apparatus and method for grinding lumpy material

Also Published As

Publication number Publication date
FR2186847A5 (enExample) 1974-01-11
IT980351B (it) 1974-09-30
GB1397934A (en) 1975-06-18
CA965068A (en) 1975-03-25
DE2230359A1 (de) 1973-11-15
ES404022A1 (es) 1975-05-01
BR7303079D0 (pt) 1974-06-27
JPS4917554A (enExample) 1974-02-16

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