US3891152A - Grate basket for hammer crushers - Google Patents

Grate basket for hammer crushers Download PDF

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Publication number
US3891152A
US3891152A US386733A US38673373A US3891152A US 3891152 A US3891152 A US 3891152A US 386733 A US386733 A US 386733A US 38673373 A US38673373 A US 38673373A US 3891152 A US3891152 A US 3891152A
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United States
Prior art keywords
grate
rotor
bar carrier
carrier means
basket
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
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US386733A
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English (en)
Inventor
Kurt Guggenheimer
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.)
Gebr HISCHMANN MASCHINENFABRIK
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Gebr HISCHMANN MASCHINENFABRIK
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Publication date
Application filed by Gebr HISCHMANN MASCHINENFABRIK filed Critical Gebr HISCHMANN MASCHINENFABRIK
Application granted granted Critical
Publication of US3891152A publication Critical patent/US3891152A/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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens

Definitions

  • ABSTRACT A grate basket for hammer crushers composed of at least two segments respectively made up of a plurality of parallel grate basket walls in the form of ring sections arranged coaxially with regard to the rotor and of grate bars extending parallel to the rotor axis while being exchangeably connected to the grate basket walls interconnected by longitudinal connecting elements.
  • the grate basket is characterized primarily in that the grate basket walls are respectively divided into a base wall held by the longitudinal connecting elements and into a bar carrier which is adapted to receive the grate bars and which is secured against rotation in circumferential direction and against displacement in axial direction, the grate bar carrier being exchangeably connected to the inner surface of the base wall.
  • the present invention relates to a grate basket for hammer crushers.
  • Such grate basket is composed of at least two segments, and each of these segments consists of a plurality of grate basket side walls which are arranged parallel to each other and coaxially with regard to the rotor and of grate bars which are exchangeably connected to the grate basket side walls interconnected by longitudinal arms.
  • the grate basket side walls have the shape of annular sections.
  • the grate bars are arranged parallel to the axis of the rotor.
  • the grate bars are inserted in hole-shaped recesses in the grate basket side walls. Therefore, the grate basket side walls which project beyond the grate bars in the direction toward the rotor are exposed to an increased wear. As soon as the grate basket side walls are worn down to the grate bars, the entire grate basket has to be replaced or has to be repaired by an expensive depositing of welding material. similarly, a completely new grate basket is needed when the quality or condition of the material to be crushed makes it necessary to use a different gap width of the grates or when the granular size of the finish-crushed material is to be varied by using a different gap width of the grates.
  • an object of the present invention to provide a grate basket for hammer crushers of the described general type which will permit an exchange of those parts which are subjected to wear in a simple manner and within a minimum of time.
  • FIG. 1 illustrates a cross section through a grate basket according to the invention which is composed of two segments.
  • FIG. 2 is a perspective view of a grate basket segment according to the invention.
  • FIG. 3 is a perspective view of a grate bar according to the invention.
  • FIG. 4 illustrates a cutout of a grate basket made up of grate bars of the type shown in FIG. 3.
  • the grate basket according to the present invention is characterized primarily in that the grate basket side walls are respectively divided into a base side wall and a bar carrier for receiving the grate bars, the bar carrier being secured against rotation in circumferential direction and also being secured against displacement in axial direction while being exchangeably connected to the inner surface of the base side wall.
  • each clamping screw comprises two screw bolts arranged parallel to each other so that a connection on two sides is effected.
  • the bar carriers are secured against rotation in the circumferential direction by means of protrusions engaging recesses in the base side walls.
  • the bar carriers are furthermore secured against displacement in axial direction by guiding strips which extend parallel to the longitudinal arms.
  • the guiding strips are provided with slots for the bar carriers.
  • the grate bars within the region of the grate basket side walls with holding noses which increase the grate bar cross section.
  • the grate bars protrude in a manner known per se with a portion of their rectangular, trapezoidal or triangular cross sectional surface from the grooves in the grate basket side walls toward the rotor.
  • the holding noses are insertable in axial di rection in undercut portions of the grooves provided in the grate basket side walls.
  • the grate bars can easily from above be inserted into the unilaterally open grooves of the grate basket side walls and can be secured against dropping out by a slight axial displacement.
  • the length of this displacement corresponds merely to the width of the holding noses.
  • the grate basket according to the invention for a hammer crusher (not shown) comprises two segments and is arranged coaxially with regard to the rotor l which latter is connected to a rotatable shaft 2.
  • a plurality of crushers 4 Connected to the rotor l is a plurality of crushers 4 which are adapted freely to rotate on crusher shafts 3 journalled on the rotor l.
  • the direction of rotation of rotor l is indicated by an arrow in FIG. 1.
  • Each grate basket segment comprises a plurality of grate basket side walls 5 which extend parallel to each other and are located coaxially with regard to the rotor 1.
  • Each grate basket segment furthermore comprises grate bars 7 which extend in a direction parallel to the rotor shaft 2.
  • Each grate basket side wall 5 is composed of a base side wall 5a and a bar carrier 5b.
  • the base side walls 50 are interconnected by tubular longitudinal arms 6 and by guiding strips 10.
  • the bar carriers 5b are provided with recesses 5f for receiving the grate bars 7.
  • the exchangeable connection of the grate bars 5b to the base side walls 5a is effected by means of clamping screws 8 which in the specific embodiment shown consist of two screw bolts of U-shaped configuration which are arranged parallel to each other. These clamping screws 8 can be inserted into the bores Sc of the bar carrier 5b.
  • the fixing of the clamping screws 8 is effected by means of a plate 9 which rests on the outer surface of the base side walls 50.
  • each inner surface of the base side walls 5a is provided with a recess 5d engaged by a protrusion 5e on the outer surface of the bar carriers 5b.
  • a displacement of the bar carriers 5b carrying the grate bars 7 in axial direction is prevented by the fact that the bar carriers 5b are inserted into slots of the guiding strips 10.
  • These guiding strips 10 are arranged parallel with regard to the longitudinal arms 6 on the base side walls Sa. According to the embodiment illustrated in FIGS. 1 and 2, each grate basket segment is provided with three guiding strips 10.
  • the grate bars 7 are arranged in bore-shaped recesses 5f within the bar carriers 5b
  • the grate bars 7 according to FIGS. 3 and 4 are located within unilaterally open grooves 5g of the grate bar side walls 5.
  • Each grate bar 7 is within the region of the grate basket side walls 5 provided with a holding nose 7a which increases the cross section of the grate bar.
  • These holding noses 7a engage undercut portions Sh of the grooves 5g when the grate bars 7 are displaced in longitudinal direction by approximately the width of the holding noses 7a after the grate bars have been inserted in radial direction from the top into the open grooves 5g of the grate basket side walls 5.
  • the grate bars 7 have to be inserted over their entire length in axial direction thereof into the recesses sf of the grate basket side walls 5, it is possible with the embodiment of FIGS. 3 and 4 to insert the grate bars 7 from above into the open grooves 5g.
  • the bars 7 For fixing the bars 7 to the side walls 5, it is merely necessary to displace the grate bars slightly in axial direction and, more specifically, by a distance which corresponds approximately to the width of the holding noses 7a.
  • the assembly and repair of the grate baskets is greatly simplified while the design of the grate bars 7 illustrated in FIGS. 3 and 4 may, of course, also be employed for grate basket side walls 5 which are divided into base side wall 5a and bar carrier 5b.
  • the dividing up of the grate basket side walls into base side wall and bar carrier and the exchangeable connection of the bar carrier to the base side wall makes it possible within a minimum of time to exchange the bar carrier of the grate basket with the grate bars for a new grate bar carrier.
  • the design of the grate basket according to the present invention thus reduces the idling time of the hammer crusher as it is required for repair work due to excessive wear to a minimum without the necessity of stockpiling expensive replacement parts.
  • the exchangeable parts of the grate basket according to the invention are those parts which are subject to wear and which can anyhow not be used again.
  • an exchange of the parts subjected to wear may not have to be effected exclusively due to wear of these parts, but may. for instance, also be effected when the hammer crusher is to be equipped with a grate of different gap width between the bars. Such exchange becomes necessary, for instance, with varying moisture content of the material to be crushed or when a different granular size of the finish-crushed material is desired.
  • a grate basket for hammer crushers which includes a rotor, at least two segmental members, each of said segmental members comprising a plurality of subdivided wall members arranged parallel and in spaced relationship to each other and being located coaxially with regard to said rotor, a plurality of grate bars extending substantially parallel to the axis of said rotor, connecting means extending in the axial direction of said grate basket and being exchangeably connected to said wall members, said subdivided wall members respectively comprising a base wall and bar carrier means, said connecting means supporting said base walls, and said grate bars being supported by said bar carrier means, and means for preventing said bar carrier means from moving in the circumferential direction of said rotor and from displacement in axial direction, said bar carrier means being readily interchangeable and detachably connected to said base walls.
  • a grate basket for hammer crushers which includes a rotor, at least two segmental members comprising a plurality of wall members arranged parallel and in spaced relationship to each other and being located coaxially with regard to said rotor, a plurality of grate bars extending substantially parallel to the axis of said rotor, connecting means extending in the axial direction of said grate basket and being exchangeably connected to said wall members, said wall members re spectively comprising a base wall and bar carrier means, said connecting means supporting said base walls, and said grate bars being supported by said bar carrier means, and means for preventing said bar carrier means from moving in the circumferential direc tion of said rotor and from displacement in axial direction, said bar carrier means being detachably connected to said base walls, said bar carrier means including bore means, and comprising clamping screw means insertable in said bore means for connecting said bar carrier means to said base walls, and lashing means for resting said clamping screw means onto the inner sur face of said base walls.
  • each of said clamping screw means comprises two screw bolts extending substantially parallel to each other.
  • a grate basket for hammer crushers which includes a rotor, at least two segmental members comprising a plurality of wall members arranged parallel and in spaced relationship to each other and being located eoaxially with regard to said rotor, a plurality of grate bars extending substantially parallel to the axis of said rotor, connecting means extending in the axial direction of said grate basket and being exchangeably connected to said wall members.
  • said wall members respectively comprising a base wall and bar carrier means, said connecting means supporting said base walls, and said grate bars being supported by said bar carrier means, and means for preventing said bar carrier means from moving in the circumferential direction of said rotor and from displacement in axial direction
  • said bar carrier means being detachably connected to said base walls, said base walls being provided with recess means, and said bar carrier means being provided with protrusion means for engaging said recess means to prevent said bar car ier means from turning in the circumferential direction of said rotor, guiding strip means being provided which extend substantially parallel to said connecting means and are provided with slots for respectively receiving said bar carrier means, said bar carrier means being prevented by said guiding strip means from accidental displacement in axial direction of said bar carrier means.
  • a grate basket for hammer crushers which includes a rotor, at least two segmental members comprising a plurality of wall members arranged parallel and in spaced relationship to each other and being located coaxially with regard to said rotor, a plurality of grate bars extending substantially parallel to the axis of said rotor, connecting means extending in the axial direction of said grate basket and being exchangeably connected to said wall members, said wall members respectively comprising a base wall and bar carrier means, said connecting means supporting said base walls, and said grate bars being supported by said bar carrier means, and means for preventing said bar carrier means from moving in the circumferential direction of said rotor and from displacement in axial direction, said bar carrier means being detachably connected to said base walls, said wall members being provided with grooves having an undercut section, and said grate bars within the region of said wall members being provided with holding noses for engagement with said undercut sections to hold said grate bars in said grooves, said grate bars being insertable into said groove

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
US386733A 1972-08-09 1973-08-08 Grate basket for hammer crushers Expired - Lifetime US3891152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2239099A DE2239099C3 (de) 1972-08-09 1972-08-09 Rostkorb für Hammerbrecher

Publications (1)

Publication Number Publication Date
US3891152A true US3891152A (en) 1975-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
US386733A Expired - Lifetime US3891152A (en) 1972-08-09 1973-08-08 Grate basket for hammer crushers

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US (1) US3891152A (OSRAM)
JP (1) JPS547975B2 (OSRAM)
DE (1) DE2239099C3 (OSRAM)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015783A (en) * 1975-07-10 1977-04-05 American Pulverizer Company Reversible grate bar and support for crushers
US4146184A (en) * 1976-09-20 1979-03-27 Sivyer Steel Corporation Shredder with grate door
US5018674A (en) * 1989-10-10 1991-05-28 Williams Robert M Grate assembly in a down draft impact mill
US5205667A (en) * 1991-10-07 1993-04-27 Montgomery Industries International Inc. Pivot pin for shredder
US5242124A (en) * 1991-07-23 1993-09-07 Manfred Latzel Apparatus for conveying, comminuting and mixing materials comprising/not comprising solid matter
US5244158A (en) * 1990-08-02 1993-09-14 Popovich Paul D Scrap processor
US5713525A (en) * 1995-03-31 1998-02-03 Wood Technology, Inc. Horizontal comminuting machine particularly for recyclable heavy wood randomly carrying non-shatterable foreign pieces
US5842653A (en) * 1997-01-24 1998-12-01 Global Processing Systems, Inc. Slow speed hammermill for size reduction of wood chips
US6305623B1 (en) * 1998-08-19 2001-10-23 Republic Welding Company Rotary grinder with improved ram and screen
WO2004024331A1 (de) * 2002-08-29 2004-03-25 Bhs-Sonthofen Gmbh Zerkleinerungsvorrichtung
US6786439B2 (en) * 2000-11-15 2004-09-07 Diamond Z Manufacturing Retractable rod screens
US20040251347A1 (en) * 2002-11-05 2004-12-16 The Fitzpatrick Company Clean-in-place mill housing
WO2012152996A2 (en) 2011-05-06 2012-11-15 Andritz Oy Bottom grate of a crusher or drum chipper and method of producing the bottom grate
CN102847585A (zh) * 2012-08-29 2013-01-02 四川先为机械有限公司 一种关节式活动筛架及其破碎机
US20130240651A1 (en) * 2010-11-26 2013-09-19 Metso Lindemann Gmbh Hammer crusher grill
US20150250101A1 (en) * 2014-03-05 2015-09-10 Kevin J. Kile Concaves for an agricultural combine
US20160107168A1 (en) * 2014-10-20 2016-04-21 Imperial Technologies, Inc. Aggregate breaker and sorter with modified grizzlies
US20160295802A1 (en) * 2013-11-20 2016-10-13 Cnh Industrial America Llc Agricultural Harvester Concave System and Method
US9718064B1 (en) * 2014-10-23 2017-08-01 Bill H. Ranne Submicron grinding mill
US9723791B1 (en) 2014-03-05 2017-08-08 Kevin J. Kile Concaves for an agricultural combine
US10130953B1 (en) 2015-10-19 2018-11-20 Bill H. Ranne Submicron particle grinding mill
US20190022661A1 (en) * 2017-07-24 2019-01-24 General Mills, Inc. Delumper and Method of Delumping Edible Material
US10440893B2 (en) 2014-03-05 2019-10-15 Kevin J. Kile Concaves for an agricultural combine
US10682649B2 (en) 2013-04-09 2020-06-16 Esco Group Llc Discharge grates for reduction mills
US11464169B2 (en) * 2017-12-28 2022-10-11 Brian G. Robertson Combine harvester concave threshing bar

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3215882A1 (de) * 1982-04-29 1983-11-03 Fried. Krupp Gmbh, 4300 Essen Hammerbrecher
DE3511847A1 (de) * 1985-03-30 1986-10-09 Hazemag Dr. E. Andreas GmbH & Co, 4400 Münster Mahlrost fuer prall- oder hammermuehlen
DE3825151A1 (de) * 1988-07-23 1990-01-25 Lindemann Maschfab Gmbh Rotor mit schutzschilden fuer eine zerkleinerungsmaschine
FR2660213B1 (fr) * 1990-03-30 1993-03-19 Becker Arnaud Broyeur a marteaux, a alimentation centrale, pour le dechiquetage d'objets metalliques.
ATE331566T1 (de) * 2002-05-08 2006-07-15 Unterwurzacher Patentverwertun Zerkleinerungsmaschine zum zerkleinern von material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813045A (en) * 1971-11-08 1974-05-28 Polysius Ag Hammer crusher

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE105777C (OSRAM) *
DE106933C (OSRAM) *
DE531699C (de) * 1931-08-17 Arno Andreas Auswechselbarer Rost fuer Hammerbrecher
DE678451C (de) * 1936-11-02 1939-07-15 Pensylvania Crusher Company Schlaegermuehle
DE1276983B (de) * 1966-01-13 1968-09-05 Miag Muehlenbau & Ind Gmbh Stabrost fuer Hammerbrecher
US3591096A (en) * 1969-02-12 1971-07-06 Pennsylvania Crusher Corp Screen bar
DE7034512U (de) * 1970-09-17 1971-01-14 Miag Muehlenbau & Ind Gmbh Klassierrost fuer hammerbrecher.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813045A (en) * 1971-11-08 1974-05-28 Polysius Ag Hammer crusher

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015783A (en) * 1975-07-10 1977-04-05 American Pulverizer Company Reversible grate bar and support for crushers
US4146184A (en) * 1976-09-20 1979-03-27 Sivyer Steel Corporation Shredder with grate door
US5018674A (en) * 1989-10-10 1991-05-28 Williams Robert M Grate assembly in a down draft impact mill
US5244158A (en) * 1990-08-02 1993-09-14 Popovich Paul D Scrap processor
US5242124A (en) * 1991-07-23 1993-09-07 Manfred Latzel Apparatus for conveying, comminuting and mixing materials comprising/not comprising solid matter
US5205667A (en) * 1991-10-07 1993-04-27 Montgomery Industries International Inc. Pivot pin for shredder
US5713525A (en) * 1995-03-31 1998-02-03 Wood Technology, Inc. Horizontal comminuting machine particularly for recyclable heavy wood randomly carrying non-shatterable foreign pieces
US5842653A (en) * 1997-01-24 1998-12-01 Global Processing Systems, Inc. Slow speed hammermill for size reduction of wood chips
US5904306A (en) * 1997-01-24 1999-05-18 Global Processing Systems, Inc. Slow speed hammermill for size reduction of wood chips
US6305623B1 (en) * 1998-08-19 2001-10-23 Republic Welding Company Rotary grinder with improved ram and screen
US6786439B2 (en) * 2000-11-15 2004-09-07 Diamond Z Manufacturing Retractable rod screens
WO2004024331A1 (de) * 2002-08-29 2004-03-25 Bhs-Sonthofen Gmbh Zerkleinerungsvorrichtung
US20060124787A1 (en) * 2002-08-29 2006-06-15 Helmut Schweiger Comminuting device
KR100752684B1 (ko) * 2002-08-29 2007-08-29 베하에스-존트호펜 게엠베하 분쇄 장치
CN100374208C (zh) * 2002-08-29 2008-03-12 Bhs桑托芬有限公司 粉碎装置
US7533837B2 (en) 2002-08-29 2009-05-19 Bhs-Sonthofen, Gmbh Comminuting device
US20040251347A1 (en) * 2002-11-05 2004-12-16 The Fitzpatrick Company Clean-in-place mill housing
US7240871B2 (en) * 2002-11-05 2007-07-10 The Fitzpatrick Company Clean-in-place mill housing
RU2571348C2 (ru) * 2010-11-26 2015-12-20 Метсо Линдеманн Гмбх Колосник молотковой дробилки
US20130240651A1 (en) * 2010-11-26 2013-09-19 Metso Lindemann Gmbh Hammer crusher grill
WO2012152996A3 (en) * 2011-05-06 2013-05-02 Andritz Oy Bottom grate of a crusher or drum chipper and method of producing the bottom grate
US9713811B2 (en) * 2011-05-06 2017-07-25 Andritz Oy Bottom grate of a crusher or drum chipper and method of producing the bottom grate
CN103501910A (zh) * 2011-05-06 2014-01-08 安德里兹公司 破碎机或鼓式碎裂机的底部篦筛和生产底部篦筛的方法
US20140166794A1 (en) * 2011-05-06 2014-06-19 Andritz Oy Bottom grate of a crusher or drum chipper and method of producing the bottom grate
WO2012152996A2 (en) 2011-05-06 2012-11-15 Andritz Oy Bottom grate of a crusher or drum chipper and method of producing the bottom grate
CN103501910B (zh) * 2011-05-06 2016-03-09 安德里兹公司 破碎机或鼓式碎裂机的底部篦筛和生产底部篦筛的方法
CN102847585A (zh) * 2012-08-29 2013-01-02 四川先为机械有限公司 一种关节式活动筛架及其破碎机
US10682649B2 (en) 2013-04-09 2020-06-16 Esco Group Llc Discharge grates for reduction mills
US10143141B2 (en) * 2013-11-20 2018-12-04 Cnh Industrial America Llc Harvester concave with modularized independently configurable and detachable assemblies
US20160295802A1 (en) * 2013-11-20 2016-10-13 Cnh Industrial America Llc Agricultural Harvester Concave System and Method
US9504204B2 (en) * 2014-03-05 2016-11-29 Kevin J. Kile Removable concave threshing bars for an agricultural combine
US10390490B1 (en) 2014-03-05 2019-08-27 Kevin J. Kile Concaves for an agricultural combine
US9723791B1 (en) 2014-03-05 2017-08-08 Kevin J. Kile Concaves for an agricultural combine
US9723792B1 (en) 2014-03-05 2017-08-08 Kevin J. Kile Concaves for an agricultural combine
US20150250101A1 (en) * 2014-03-05 2015-09-10 Kevin J. Kile Concaves for an agricultural combine
US10440893B2 (en) 2014-03-05 2019-10-15 Kevin J. Kile Concaves for an agricultural combine
US20160107168A1 (en) * 2014-10-20 2016-04-21 Imperial Technologies, Inc. Aggregate breaker and sorter with modified grizzlies
US9718064B1 (en) * 2014-10-23 2017-08-01 Bill H. Ranne Submicron grinding mill
US10130953B1 (en) 2015-10-19 2018-11-20 Bill H. Ranne Submicron particle grinding mill
US20190022661A1 (en) * 2017-07-24 2019-01-24 General Mills, Inc. Delumper and Method of Delumping Edible Material
US10543489B2 (en) * 2017-07-24 2020-01-28 General Mills, Inc. Delumper and method of delumping edible material
US11464169B2 (en) * 2017-12-28 2022-10-11 Brian G. Robertson Combine harvester concave threshing bar

Also Published As

Publication number Publication date
DE2239099B2 (de) 1976-01-02
DE2239099A1 (de) 1974-02-28
JPS4959345A (OSRAM) 1974-06-08
DE2239099C3 (de) 1982-07-29
JPS547975B2 (OSRAM) 1979-04-11

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