US2792994A - Ball and track grinding mill with drive means arranged such that drive torque reaction will maintain pressures between the balls and tracks - Google Patents

Ball and track grinding mill with drive means arranged such that drive torque reaction will maintain pressures between the balls and tracks Download PDF

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Publication number
US2792994A
US2792994A US429056A US42905654A US2792994A US 2792994 A US2792994 A US 2792994A US 429056 A US429056 A US 429056A US 42905654 A US42905654 A US 42905654A US 2792994 A US2792994 A US 2792994A
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US
United States
Prior art keywords
track
balls
ring
rings
rotatable
Prior art date
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
Application number
US429056A
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English (en)
Inventor
Szego Laszlo
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Individual
Original Assignee
Individual
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Filing date
Publication date
Priority claimed from GB19189/53A external-priority patent/GB749844A/en
Priority claimed from GB17195/53A external-priority patent/GB761360A/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2792994A publication Critical patent/US2792994A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • B02C15/12—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings
    • 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
    • B02C15/12—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings
    • B02C2015/126—Mills with at least two discs or rings and interposed balls or rollers mounted like ball or roller bearings of the plural stage type
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/12—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/12—Inorganic compounds
    • C10L1/1233—Inorganic compounds oxygen containing compounds, e.g. oxides, hydroxides, acids and salts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/12—Inorganic compounds
    • C10L1/1291—Silicon and boron containing compounds

Definitions

  • a fixed track ring provided on its radially inner side with a track of arcuate cross section
  • a rotatable shaft extending through the fixed track ring and carrying a rotatable track ring
  • a set of balls arranged between the fixed track ring and the rotatable track ring
  • driving means between the shaft and the rotatable track ring so arranged that the torque reaction during rotation of the shaft tends to urge the rotatable ring axially along the shaft, the track on the rotatable track ring being so shaped that the axial thrust on the said ring urges the balls outwardly against the fixed track ring.
  • two axially spaced fixed track rings are provided, and the rotatable shaft carries two rotatable track rings, two sets of balls being provided, each between one fixed track ring and one rotatable track ring, the driving means being so arranged that the two rotatable track rings are urged axially in opposed directions.
  • the driving means may comprise a screw or equivalent mechanism, and in a preferred embodiment of the invention consists of a plurality of balls engaging" helical grooves in the rotatable shaft and in the rotatable track rings.
  • Figure 1 is a vertical section through one form of grind ing machine according to the invention having two grinding stages;
  • Figure 2 is a sectional plan view of the grinding machine shown in Figure 1 taken on the line 2-2 of Figure 1;
  • Figure 3 is a similar section through a mill having a larger number of stages.
  • the grinding machine comprises a cylindrical casing 19 mounted between upper and lower end caps 11 and 12, between which are clamped two fixed track rings 13 and 14 spaced apart by a spacing ring 15.
  • Arcuate track grooves 16 are formed in the inner surfaces of the track rings 13 and 14.
  • a driving shaft 17 passing upwardly through a central opening in the lower end cap 12 has keyed to it a driving sleeve 18 from the longitudinal centre of which extend two helical grooves 19 and 21 of-opposite hand.
  • Two rotatabletrack rings 22 and 23 surround the sleeve 18, one on each side of the longitudinal centre of the said sleeve, the track ring 22 being formed internally with a helical groove 24 of the same hand as the groove 19, and the track ring 23 being formed internally with a helical groove 25 of the same hand as 2,792,994 in Patented May 21, 1957 the groove 21.
  • a row of driving balls 26 is engaged in both grooves 24 and 19, and a similar row of driving balls 27 is engaged with both grooves 25 and 21, each row of driving balls being located by a cage 28.
  • each track ring 22 and 23 is formed with a track 29 having a curved profile in cross-section such that the radius of the track 29 increases toward the side of the track ring nearer to the longitudinal centre of the sleeve 13.
  • Grinding balls 31 form two rows, one between the track rings 13 and 22 and the other between the track rings 14 and 23.
  • the driving shaft 17 is rotated in such a. direction that drag on the track rings 22 and 23 tends to produce relative turning movement of the shaft 17 and the track rings 22, 23 in a direction such that the said rings 22 and 23 are urged axially apart, thus, due to the shape of the tracks 29, thrusting the grinding balls 31 outwardly against the track rings 13 and 14, and so increasing the pressure between the balls 31 and the track rings.
  • Material to be ground is fed into the machine through a hopper 32, and is distributed by a cone 33 rotating with the sleeve 18, the hopper 32 leading into a feed tube 34 terminating just above the surface of the cone 33.
  • the position of the feed tube 34 is adjustable to vary the rate at which material is fed to the machine, the feed tube 36 having screw-threaded engagement at 35 with the end cap 11, and being locked in position by a locking ring 36.
  • a tapering annular air passage 37 is formed in the end cap 11, the said passage opening into the interior of the machine through an annular slot 33. Air blown into the large end of the passage 37 provides a whirling current of air entering the grinding chamber through the slot 38, the tapered form of the passage 37 causing the air to be substantially evenly distributed around the circumference ofthe slot.
  • the end cap 12 is formed with a similar tapered annular air passage 39, opening into the grinding chamber through a slot 41. i
  • the rotating cone 33 throws the material outwardly into the pass between the grinding balls 31 and the track groove 16 in the track ring 13, the material being crushed by the rolling action of the balls on the said track ring.
  • the air current through the slot 38 facilitates the even distribution of the material.
  • the rotation of the grinding balls throws the material outwardly, as it leaves the first pass, into the pass between the balls 31 and the track groove 16 in the track ring 14, where further grinding takes place, the material leaving the second pass being guided by an inclined skirt 42 rotating with the sleeve 18 into the slot 41 and so into the passage 39, from which it is removed by suction applied to the larger end of that passage, or by the current of air blown into the upper end of the machine.
  • the multi-stage grinding machine shown in Figure 3 operates on the same principle as that shown in Figure 1.
  • the machine comprises a cylindrical body 44 closed at its upper and lower ends respectively by end caps 45 and 46 in which are formed'inlet and outlet passages 47 and 48 respectively, and a driving shaft 4-9 extending upwardly through a packing gland 51 in the lower end cap 46.
  • Alternate spaces between the track rings 53 are occupied by compressible spacing rings 55, for example of indiarubber, the intermediate spaces being occupied by noncompressible spacing rings 56, for example of steel.
  • the lower part of the driving shaft 49 has keyed to it, by a key 57, three double track rings
  • the said double track rings 53 may be integral units, the upper two such track rings being shown in this form, or may each consist of two separate track rings 58a, the lowest ring being shown in this form.
  • Each double track ring co-operates with rows of grinding balls 59 engaging two adjacent track rings 53 separated by a compressible spacing ring 55, the double track rings being free for limited axial movement on the driving shaft, and the gaps between them being covered by deflector rings 61.
  • the upper end of the driving shaft 49 is reduced in diameter and has keyed to it by a key 62 a driving sleeve 63 formed externally with divergent helical grooves 64 and 65, and surrounding the sleeve 63 are two single internal track rings 66 formed internally with helical grooves 67 and 63 of opposite hand, driving balls 69 being located in the mating grooves 64 and 67 and in the mating grooves 65 and 65. Grinding balls 59 are disposed between the inner track rings 66 and the upper two outer track rings 53.
  • the inner track rings are arranged between end plates 71 and 72 on the driving shaft 49, the plates 71 and 72 being shaped to guide the material into the first pass at the upper end of the machine and away from the driving shaft at the lower end of the machine.
  • cooling may be effected by liquid flowing through an annular chamber 73, as shown in Figure 3.
  • a grinding machine of the type referred to comprising a fixed track ring provided at its radially inner side with a track of arcuate cross section, a rotatable shaft extending through the fixed track ring a rotatable track ring on said shaft, a track on said rotatable track ring,
  • a set of grinding balls arranged between the fixed track ring and the rotatable track'ring, and driving means between the shaft and the rotatable track ring so arranged that the torque reaction during rotation of the shaft tends to urge the rotatable track ring axially along the shaft, the track on the rotatable trackring being so shaped that the axial thrust on the said ring urges the grinding balls outwardly against the fixed track ring.
  • a grinding machine having two axially spaced fixed track rings, and two rotatable track rings on said shaft, two sets of grinding balls being provided, each between one fixed track ring and one rotatable track ring, the driving means being so arranged that the two rotatable track rings are urged axially in opposite directions.
  • a grinding machine wherein at least two additional sets of grinding balls are provided, the outer track ring associated with one of said additional sets of balls being arranged for axial displacement by thrust applied thereto by the outer track ring associated with one of the sets of balls the inner race of which is acted on by the driving means, and the inner track rings associated with said additional sets of balls being axially movable and either integral or movable together as one.
  • a grinding machine wherein a compressible spacing ring is interposed between the outer track rings associated with the two additional sets of grinding balls.
  • a grinding machine comprising a fixed track ring, a track of arcuate cross-section provided on the radially inner side of said fixed track ring, a rotatable shaft extending through said fixed track ring, a rotatable track ring, a track on said rotatable track ring, a set of grinding balls arranged between the fixed track ring and the rotatable track ring, a helical groove in the rotatable shaft, a helical groove in the rotatable track ring, and a plurality of driving balls engaging in both said helical grooves, whereby torque reaction during rotation of the shaft tends to urge the rotatable track ring axially along the shaft, the track on the rotatable track ring being so shaped that the axial thrust on the said ring urges the grinding balls outwardly against the fixed track ring.
  • a grinding machine comprising two axially spaced fixed track rings, a track of arcuate cross-section provided on the radially inner side of each said fixed track ring, a rotatable shaft extending through both of said fixed track rings, two rotatable track rings, a track on each rotatable track ring, two sets of grinding balls each arranged between one fixed track ring and one rotatable track ring, two helical grooves of mutually opposite hand in said rotatable shaft, a helical groove in each of said rotatable track rings each of said last-mentioned grooves being of the same hand as one groove in the rotatable shaft, and two sets of driving balls each engaging in a helical groove in the rotatable shaft and the helical groove of the same hand in a rotatable track ring, whereby torque reaction during rotation of the shaft tends to urge the rotatable track rings in opposite directions axially along the shaft, the tracks on the rotatable track rings being so shaped that the

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Rolling Contact Bearings (AREA)
US429056A 1953-05-13 1954-05-11 Ball and track grinding mill with drive means arranged such that drive torque reaction will maintain pressures between the balls and tracks Expired - Lifetime US2792994A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB13452/53A GB733733A (en) 1953-05-13 1953-05-13 Comminutor
GB19189/53A GB749844A (en) 1953-07-10 1953-07-10 Improvements in or relating to the manufacture of an alkyl nitrate
GB17195/53A GB761360A (en) 1954-05-07 1954-05-07 Improvements in and relating to fuel oils and the burning of fuel oils

Publications (1)

Publication Number Publication Date
US2792994A true US2792994A (en) 1957-05-21

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ID=27671124

Family Applications (1)

Application Number Title Priority Date Filing Date
US429056A Expired - Lifetime US2792994A (en) 1953-05-13 1954-05-11 Ball and track grinding mill with drive means arranged such that drive torque reaction will maintain pressures between the balls and tracks

Country Status (7)

Country Link
US (1) US2792994A (it)
BE (1) BE528775A (it)
CH (1) CH316228A (it)
DE (1) DE1017887B (it)
FR (1) FR1105248A (it)
GB (1) GB733733A (it)
NL (1) NL91741C (it)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286937A (en) * 1962-11-27 1966-11-22 John Robert Berend Homogenizer for mixing and fragmenting substances
US3709442A (en) * 1969-10-18 1973-01-09 Carle & Montanari Spa Mill for the refining of cocoa, chocolate, paints, lacquers, enamels and the like
WO1990008595A1 (en) * 1989-02-06 1990-08-09 Spectrum Sciences B.V. Dispersion apparatus
CN108816140A (zh) * 2018-07-03 2018-11-16 南京拉艾夫医药科技有限公司 一种用于盐酸美金刚原料药的载药混合机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121437B (de) * 1958-01-07 1962-01-04 Rhodiaceta Kugelquetschmuehle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US862720A (en) * 1906-03-14 1907-08-06 Albert A Day Apparatus for preparing and feeding fine fuel.
US1499624A (en) * 1921-03-08 1924-07-01 Smidth & Co As F L Grinding machine
US2204140A (en) * 1937-09-28 1940-06-11 Harold W Langbein Mill

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE367989C (de) * 1918-07-10 1923-01-29 Eugene Odam Fliehkraftkugelmuehle zur Herstellung von Metallpulver aus koernigem Metall mit einem oder mehreren Mahlkraenzen
DE821590C (de) * 1949-01-31 1951-11-19 Cromwell Ind Securities Ltd Kugelquetschmuehle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US862720A (en) * 1906-03-14 1907-08-06 Albert A Day Apparatus for preparing and feeding fine fuel.
US1499624A (en) * 1921-03-08 1924-07-01 Smidth & Co As F L Grinding machine
US2204140A (en) * 1937-09-28 1940-06-11 Harold W Langbein Mill

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3286937A (en) * 1962-11-27 1966-11-22 John Robert Berend Homogenizer for mixing and fragmenting substances
US3709442A (en) * 1969-10-18 1973-01-09 Carle & Montanari Spa Mill for the refining of cocoa, chocolate, paints, lacquers, enamels and the like
WO1990008595A1 (en) * 1989-02-06 1990-08-09 Spectrum Sciences B.V. Dispersion apparatus
US5004165A (en) * 1989-02-06 1991-04-02 Spectrum Sciences B.V. Dispersion apparatus
CN108816140A (zh) * 2018-07-03 2018-11-16 南京拉艾夫医药科技有限公司 一种用于盐酸美金刚原料药的载药混合机

Also Published As

Publication number Publication date
CH316228A (fr) 1956-09-30
FR1105248A (fr) 1955-11-29
BE528775A (it)
GB733733A (en) 1955-07-20
NL91741C (it)
DE1017887B (de) 1957-10-17

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