GB922912A - Automatic control means for crushers - Google Patents

Automatic control means for crushers

Info

Publication number
GB922912A
GB922912A GB35661/61A GB3566161A GB922912A GB 922912 A GB922912 A GB 922912A GB 35661/61 A GB35661/61 A GB 35661/61A GB 3566161 A GB3566161 A GB 3566161A GB 922912 A GB922912 A GB 922912A
Authority
GB
United Kingdom
Prior art keywords
crusher
feed
circuit
instrument
rate
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
Application number
GB35661/61A
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.)
Allis Chalmers Corp
Original Assignee
Allis Chalmers Corp
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 Allis Chalmers Corp filed Critical Allis Chalmers Corp
Publication of GB922912A publication Critical patent/GB922912A/en
Expired legal-status Critical Current

Links

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
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • 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
    • B02C2/02—Crushing or disintegrating by gyratory or cone crushers eccentrically moved
    • B02C2/04—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

922,912. Automatic control. ALLISCHALMERS MANUFACTURING CO. Oct. 3, 1961 [Oct. 11, 1960], No. 35661/61. Class 38 (4). Deviations in the ratio of power input to material output of a crusher are automatically corrected (a) by variation of the rate of feed of material to the crusher, and (b) by variation of the size to which the material is crushed, when the volume of material in the crusher exceeds a predetermined value. In Fig. 2, the shaft 12 of a crusher is driven by an electric motor 13. Material to be crushed is supplied by a conveyer 16 and the crushed material is removed by a conveyer 18. A strain gauge 20 associated with conveyer 18 produces an electrical signal dependent on the output of the crusher which is indicated by a meter 21. The power input to the crusher is indicated by a wattmeter 29 associated with motor 13. An instrument 30 responsive to both the above measurements indicates the ratio of power input to material output. Under automatic control, when the power/output ratio falls below a desired range of values, instrument 30 applies a signal to a transistor or magnetic amplifier type control circuit 43, 44 so that if the fall persists beyond a predetermined time a motor-operated potentiometer 45 is operated to increase the speed of conveyer 16 in steps until the desired ratio is restored. Should the volume of material in the crusher exceed a predetermined value under these conditions a further circuit 50 is influenced to render circuit 43 ineffective to increase rate of feed and render circuits 48, 52, which are similar to circuits 43, 44, effective instead to operate a motor-operated potentiometer 36 associated with an electro-hydraulic system 59, 14, to raise crusher head 15 and decrease the size of the crushed material by reducing the size of the crushed material which is indicated by an instrument 34. If the power/output ratio should rise above the predetermined range of values, instrument 30 applies a signal to circuits 61, 66 which function in a similar manner to circuits 43, 48 but cause first, decreases in the rate of feed by conveyer 16 and then, if the output from the crusher falls below a predetermined value instrument 21 influences circuits 61, 66 so that the ratio is corrected by increases in the size of the crushed material instead of decreases in the rate of feed. If the hopper above the crusher should fill, a circuit 63 is influenced to cause a periodic decrease in the rate of feed, and if it overfills a circuit 72 is influenced to stop the feed entirely. If, for any reason, the power supply falls unduly, instrument 29 disables the control of feed and operates a warning light 81. A circuit 83 periodically controls circuit 43 to increase the rate of feed so that the crusher is kept working near the upper limit of its working range.
GB35661/61A 1960-10-11 1961-10-03 Automatic control means for crushers Expired GB922912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61997A US3078051A (en) 1960-10-11 1960-10-11 Automatic crusher

Publications (1)

Publication Number Publication Date
GB922912A true GB922912A (en) 1963-04-03

Family

ID=22039557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35661/61A Expired GB922912A (en) 1960-10-11 1961-10-03 Automatic control means for crushers

Country Status (2)

Country Link
US (1) US3078051A (en)
GB (1) GB922912A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184640A (en) * 1978-05-05 1980-01-22 Williams Robert M Coal grinding apparatus for direct fired burners
GB2211004A (en) * 1987-12-15 1989-06-21 De Beers Ind Diamond Cone-type crusher control

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459378A (en) * 1965-10-13 1969-08-05 Ramsey Eng Co Load control system
US3604646A (en) * 1969-12-10 1971-09-14 Beloit Corp Mass rate control system for paper stock refiners
US3604645A (en) * 1969-12-10 1971-09-14 Beloit Corp Inferential mass rate control system for paper refiners
AT389653B (en) * 1985-09-10 1990-01-10 Schroedl Hermann METHOD FOR ADJUSTING THE SPLIT WIDTH OF A CONE BREAKER OR THE LIKE.
DE3622977A1 (en) * 1986-07-09 1988-01-21 Hollingsworth Gmbh DEVICE FOR OPENING FIBER PRESS BALES BY MEANS OF A REMOVING DEVICE
US4967967A (en) * 1989-11-17 1990-11-06 Nordberg Inc. Method of high crushing force conical crushing
KR0167853B1 (en) * 1995-01-23 1999-01-15 안자키 사토루 The travelling crusher and its control method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE24185E (en) * 1956-07-24 Paper machinery
US1815155A (en) * 1928-10-08 1931-07-21 Lewellen Darcy Edwin Control mechanism for machines
US2613878A (en) * 1949-02-28 1952-10-14 Schreiber Mills Inc Control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184640A (en) * 1978-05-05 1980-01-22 Williams Robert M Coal grinding apparatus for direct fired burners
GB2211004A (en) * 1987-12-15 1989-06-21 De Beers Ind Diamond Cone-type crusher control
GB2211004B (en) * 1987-12-15 1991-12-18 De Beers Ind Diamond Crusher controller
AU628307B2 (en) * 1987-12-15 1992-09-17 De Beers Industrial Diamond Division (Proprietary) Limited Crusher controller

Also Published As

Publication number Publication date
US3078051A (en) 1963-02-19

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