US1775750A - Crusher - Google Patents

Crusher Download PDF

Info

Publication number
US1775750A
US1775750A US307968A US30796828A US1775750A US 1775750 A US1775750 A US 1775750A US 307968 A US307968 A US 307968A US 30796828 A US30796828 A US 30796828A US 1775750 A US1775750 A US 1775750A
Authority
US
United States
Prior art keywords
crusher
cone
concave
symons
zone
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
US307968A
Other languages
English (en)
Inventor
Cole David
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nordberg Manufacturing Co
Original Assignee
Nordberg Manufacturing Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nordberg Manufacturing Co filed Critical Nordberg Manufacturing Co
Priority to US307968A priority Critical patent/US1775750A/en
Priority to DK44764D priority patent/DK44764C/da
Priority to DEN30855D priority patent/DE556937C/de
Priority to FR681260D priority patent/FR681260A/fr
Priority to AT122034D priority patent/AT122034B/de
Application granted granted Critical
Publication of US1775750A publication Critical patent/US1775750A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/005—Lining

Definitions

  • the invention will develop features of utility rin connection with gyratory crushers generally, but is peculiarly valuable in connecf tion with the Symons gyratory crusher because of certain limitations heretofore imposed on the design of that crusher by the requirements of the so-called sizing zone.
  • a characteristic feature of the Symons process is the feed of the material to the Crusher at a controlled rate such that the space between the cone and concave is never filled, the material flowing in a stre-am made ⁇ up of substantially a single layer of particles. It follows that the materials undergoing crushing drop yfreely through the crushing zone and pass freely through by gravity, being periodically interruptedin their m0- tion by a succession of crushing impacts.
  • the length of the zone of parallelism is governed by two main factors, first, the speed imparted to the material by gravity, and, second, the interval of time between suc'cessive crushing impacts during which the ⁇ material is permitted to drop as it is released by the increasing distance between the, opposed cone and concave and during which it glides along the cone prior to the crushing nip.
  • the interval of time is governed by the speedvof operation of the machine.
  • the length of the zone of parallelism must be such-that allthe material passing thereto will remain in the zone so long as to be .caught at least once by the cone and the concave at the moment of their closest approach.
  • This zone of parallelism with its sizing function is one of the most important and valuable features of the Symons process', but theV necessity of providing such a zone of a given length. has heretofore limited the degree of reduction which could be produced in a single crusher.
  • the walls of the cone and concave are sharply convergent forming what I shall call the reducing zone.
  • I shall call the maximum permissible angle of convergence of the cone and ⁇ concave which can not b-e exceeded, because if it is exceeded the material will be wedged ⁇ back and not crushed. This limiting angle I shall call the maximum angle of nip.
  • the work that heretofore reexperience, the maximum size to be provided for in the crusher is fourteen inches, but this size comprises less than one per cent of the whole feed; and less than ten per cent of the Whole feed exceeds two inches.
  • the final size is one-fourth of an inch.
  • Fig. 1 is a vertical axial section of a portion of a ⁇ Symons Crusher such as illustrated in the patents above mentioned, show# ing my invention applied.
  • Fig. Q is an axial section through one side of my improved cone and concave shown in full lines. and with the outlines of a Symons coarse bowl crusher and a Symons line bowl crusher heretofore used in sequence with each other, indicated in broken lines for purposes of comparison.
  • a guard bearing; 15. for preventing the escape of oil and for excluding dust. is used as in the Symons structure ⁇ and further protection against dust is afforded by the skirts lzinc 19. in the usual manner.
  • the gyrating shaft 9 carries at. its upper end the usual feeding disk Q1 which is arranged to coact with the teed restricting; chute. such as the part El ofSymons Patent 1.537.564. It. is understood that the sleeve 'i' will he rotated in any convenient manner, preferably that shown in the Symons patents, and that. eenerallyt the structure will conform to the Symons practice.
  • Q2 is the feed hopper niounted on the conical spider 23. which may be adjustably mounted. as shown in Symons 1.537.565. or may be. both coronaviruses 1.592.313. July 13, i926.
  • a concave mantle preferably formed in two parts. and E25. embedded on zinc QG. as is usual.
  • the lower section 2.5 includes the Zone oi' parallelism and the lower portion of the re duction zone.
  • the contour of the lower section follows known practice except that the upward divergence between the cone and the concave is somewhat more pronounced than in the case of a. standard Symons Crusher designed for tine crushing. and is less pronounced than in the Symons Crusher designed for coarse crushing.
  • the upper sect-ion 2l is provided with a plurality of annular crushing surfaces 27 arranged in stepped relation with each other and each at such an angle to the cone as is within the maximum permissible angle of nip. rli ⁇ he effect is to increase the entrance aperture without correspondingly increasing the angle ot nip.
  • the full line fir-B is the contour of the crushing cone and the full line B-C is the contour of the crushing concave according to the present invention.
  • the dot and dash line B-D represents the contour of a standard Symons concave for fine crushing. Such a concave would be used with a cone having the contour fir-li. In other words. it would be used with the same cone as is shown in the present application.
  • the initial reduction zone between the line H-H and the point of entrance of the material. has an effective rate of divergence greater than the divergence in either type of Sy mons Crusher. but the angle of nip is the same as that in the coarse crusher because the steps Q6 are either parallel or coincident with the broken line B-C which is the contour of the Symonscoarse crusher cone. rThe etlect is to get an entrance aperture as large as is secured in the Symons coarse. crusher, a sizing zone or zone of parallelism the same as is secured in the. Symons tine crusher. and an interveningr zone of reduction which is entirely within the present working limits. because it 'falls between the standards of two commercial Symons crushers.
  • lt may be stated that the broken line lf3-C,
  • a crusher of the type including two opposed crushing elements movable relatively toward and from one another, with means vfor feeding material between said elements at a controlled rate such that the material flows in substantially a single layer of particles which are periodically arrested by crushing impacts delivered directly .to the particles by both said members during their approach,
  • said crusher being characterized by the fact that the entrance aperture exceeds that subtended by the maximum permissible angle of nip and that there is a reduction zone immediatel beneath the e trance comprising a plura ity of steps eac )having a crushing face within'the limiting angle of nip.
  • a gyratory crusher having a cone and a'surrounding concave, means for producing gyrator motion, and means for limiting the rate of eed to a value such thatl the material flows in substantially a single layer of particles which are periodically arrested by crushing impacts delivered directly to the particles by the cone and concave, said crusher being characterized by the fact that the annular entrance to the crushing zone exceeds i that subtended by the maximum permissible angle of nip and that the concave adjacent said entrance is formedwith a plurality of annular steps each having a crushing face within the limiting angle of the nip.
  • a gyratory crusher comprising a cone member and an encircling concave member
  • one of said members having its entrance por-A tion formed with annular steps having faces within the limiting nip angle; and means for producing relative 'gyratory motion of said members.
  • a gyratory crusher comprising a cone ⁇ members being formed to afford a zone of parallelism adjacent the discharge;
  • a gyratory crusher comprising a cone member and an encircling concave member, the concave member having its -entrance portion formed with annular steps having faces within the limiting nip angle, and the two members being formed to afford a zone of parallelism adjacent the discharge; and means for producing relative gyratory motion of said members.
  • a gyratory crusher comprising a cone member and an encircling concave member, one of said members having its entrance portion formed with annular steps having faces Within the limiting nip angle; means for producing relative gyratory motion of said'mem-l bers.; and means for feeding material to said crusher at a limited rate such that the interval between the cone and concave is never filled.
  • a gyratory crusher comprising a cone member and an encircling concave member, the concave member overlying the cone member,the lower portion of the concave member approaching relatively closely to the cone p l conoidal Crushers, said lining having an annular internal surface whose elemellts are irregular lines, which lines, proceeding from the larger toward the smaller diameter, present an angle with the axis of the conoid which diminishes until a minimum valuevis approached, and thereafter are oft'- set away from said aXis in steps, each of which approximates said minimum angle.
  • a lining for the bowls of gyratory Crushers said lining having an annular conoidal internal surface Whose elements are irregular lines, Which lines, proceeding from the larger to the smaller diameter, are first substantially straight, then curve outward to'present a diminishing angle With the axis of the conoid until a minimum angle is attained, and thereafter are offset to present steps, each of which approximates said minimum angle.
  • a lining for the bowls of gyratory Crushers said lining having an annular conoidal internal surface Whose elements are irregular lines, which lines, proceeding from the larger toward the smaller diameter, present an angle with the axis of the conoid which diminishes gradually to a limiting value, to produce entrance flare, and then become sinuous and more flaring.
  • a lining as defined in claim 13 formed in two parts, one of which includes the entire sinuous portions of the elements.
  • a gyratory Crusher comprising a cone member and an overlying encircling concave member, said members being formed to afford an annular entrance with a progressively increasing flare in a direction opposed to the direction of infeed, said flare attaining a value exceeding that afforded by the maximum permissible angle of nip and the surface of one of said members in the region of such excessive flare having ribs transverse to the direction of infeed; and means for producing relative gyratory motion ofl said members.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
US307968A 1928-09-24 1928-09-24 Crusher Expired - Lifetime US1775750A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US307968A US1775750A (en) 1928-09-24 1928-09-24 Crusher
DK44764D DK44764C (da) 1928-09-24 1929-02-22 Knusemaskine.
DEN30855D DE556937C (de) 1928-09-24 1929-08-31 Kegelbrecher (Tellerbrecher)
FR681260D FR681260A (fr) 1928-09-24 1929-09-03 Perfectionnements aux broyeurs à mouvement giratoire
AT122034D AT122034B (de) 1928-09-24 1929-09-13 Mantelfutter für den äußeren Mahlkegel einer Kegelmühle.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US307968A US1775750A (en) 1928-09-24 1928-09-24 Crusher

Publications (1)

Publication Number Publication Date
US1775750A true US1775750A (en) 1930-09-16

Family

ID=23191951

Family Applications (1)

Application Number Title Priority Date Filing Date
US307968A Expired - Lifetime US1775750A (en) 1928-09-24 1928-09-24 Crusher

Country Status (5)

Country Link
US (1) US1775750A (da)
AT (1) AT122034B (da)
DE (1) DE556937C (da)
DK (1) DK44764C (da)
FR (1) FR681260A (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE933072C (de) * 1946-09-16 1955-09-15 Nordberg Manufacturing Co Kreiselbrecher oder Reibmuehle fuer Brechgut gemischter Korngroessen

Also Published As

Publication number Publication date
FR681260A (fr) 1930-05-13
AT122034B (de) 1931-03-25
DE556937C (de) 1932-08-17
DK44764C (da) 1931-11-02

Similar Documents

Publication Publication Date Title
US2128194A (en) Reducing mill
US2147833A (en) Crushing mill
US9427740B2 (en) Vertical top-fed grain mill
US3199797A (en) Pulverizer
CN101421043B (zh) 辊磨机
US2566103A (en) Liners for material crushing and grinding mills
US2635818A (en) Gyratory crusher and liner and mantle therefor
US4522343A (en) Micronized grinding apparatus
CN110339897A (zh) 上旋摆干式双腔圆锥制砂机
US1837102A (en) Gyratory crusher
US1784762A (en) Process of and apparatus for milling flour
US2207858A (en) Feeding device for crushers
US1537564A (en) Gyratory cone crusher
US2214832A (en) Pulverizer
US2181571A (en) Crushing machinery
US1087415A (en) Grinding-mill.
US2020464A (en) Feed device for a cone crusher
US1574142A (en) Gyratory crushing machine
US2171525A (en) Attrition mill
US2291992A (en) Crushing machinery
US1962462A (en) Rock crushing machine
US2828921A (en) Material feeder and material relief gate structure for gas swept pulverizers having rolling grinding elements and a stationary upper classifier
US2730307A (en) Plural stage rotary drum pulverizers, with grinding plates of regular polygonal shape
JPH11333310A (ja) 骨材生産方法及びその装置
US1692161A (en) Crusher