US2679984A - Pneumatic release for crushers - Google Patents

Pneumatic release for crushers Download PDF

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Publication number
US2679984A
US2679984A US259940A US25994051A US2679984A US 2679984 A US2679984 A US 2679984A US 259940 A US259940 A US 259940A US 25994051 A US25994051 A US 25994051A US 2679984 A US2679984 A US 2679984A
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United States
Prior art keywords
ring
cylinders
cylinder
bowl
main frame
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
US259940A
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English (en)
Inventor
Oscar C Gruender
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
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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 US259940A priority Critical patent/US2679984A/en
Priority to FR1069105D priority patent/FR1069105A/fr
Application granted granted Critical
Publication of US2679984A publication Critical patent/US2679984A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • B02C2/045—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis and with bowl adjusting or controlling mechanisms

Definitions

  • My invention relates to an improvement in releases for Crushers and has for one purpose to provide a release for crushers in which a normally fixed bowl or crushing member is opposed to a moving or gyrated crushing head.
  • Another purpose is to provide a pneumatic release for crushers.
  • Another purpose is to provide a simple pneumatic release in which a substantially uniform pressure is maintained at a plurality of points about the Crusher, the pressure being sufficient to prevent movement of the normally xed bowl except when predetermined excess crushing stresses arise.
  • Another purpose is to provide a simple system for maintaining a substantially uniform pneumatic pressure throughout a pneumatic release system in which a number of individual pneumatic elements are employed.
  • Figure l is a. vertical axial section with parts omitted;
  • Figure 2 is a section on a reduced scale onthe line 2 2 of Figure l;
  • Figure 3 is a partial section scale on the line 3-3 of Figure 2;
  • Figure 4 is a section on an enlarged scale on the line ll-ll of Figure 2;
  • Figure 5 is a partial section on the line 5-5 of Figure 1 on an enlarged scale
  • Figure 6 is a section on an enlarged scale on the line 8 6 of Figure 2.
  • Figure 7 is a partial side view of the structure of Figure l.
  • I generally indicates the upper part of a generally cylindrical main frame. 2 is a hub which may be secured to or formed integrally with the circumferential portion I. Positioned at I is a normally fixed shaft 3 which is surrounded by an eccentrically apertured sleeve li. At the lower end of the sleeve Il is a bevel gear 5 in mesh with a drive pinion B on the shaft Ea. Any suitable means may be employed for rotating the shaft 5a and for thereby rotating the sleeve d. As will be clear from Figure l, the sleeve is eccentrically apertured.
  • the axis of rotation of the sleeve is indicated by the line A of Figure l, whereas the axis of the exterior bearing surface of the sleeve is indicated by the line B of Figure l.
  • the two axes intersect on an enlarged Surrounding the exterior of the sleeve l is the crusher head generally indicated as I and having a sleeve portion la which surrounds the eccentrically apertured sleeve l. It will be understood that in response to rotation of the shaft 6a, and therefore of the sleeve d, the head 'l is given a gyratory movement about the center X.
  • the head I is shown as carrying a crushing mantle or ring 8.
  • the circumferential main frame portion I is indicated as having an upper, outwardly extending ange Ia. Resting upon it is the ring 9 shown as having a circumferential, downwardly extending centering and positioning flange It.
  • the ring is provided with an upwardly extending, inner flange II having a tapered inner surface l Ia and a generally cylindrical outer surface I lb.
  • the ring I I may be held in position by a plurality of locking screws I2.
  • the bowl supporting ring Tiltably mounted upon the flange Il is the bowl supporting ring generally indicated at I3. It includes an upwardly extending inner portion or element i4, having inwardly disposed screw threads Ilia.
  • the member I3 has a lower, outwardly extending enlargement I5, which is downwardly channeled or recessed to conform to the inwardly tapered or conic flange II, there being sufficient clearance, however, to permit the ring I3 to be tilted.
  • I6 generally indicates a bowl structure having an outer generally cylindrical portion Il', having outwardly extending screw threads ila. adapted to interpenetrate with the inwardly extending screw threads Ma of the bowl supporting member I4, whereby in response to relative rotation of the members I 4 and I'I, the bowl supporting structure I 5 can be raised or lowered.
  • Any suitable hopper I8 may be mounted on the bowl it and any suitable bowl liner or crushing ring I9 may be suitably mounted'on the lower inner part of the bowl I6, the details of the locking means not forming part of the present invention.
  • the screw threads Ilia and IIa are suitably protected by a lower sealing ring 20 and by an upper sealing ring 2
  • the skirt 22 depends from and is secured to an upper, outer portion of the bowl member I'I.
  • I may employ any suitable means to lock the opposed screw threads against unintended rotation.
  • the screws 23 serve to take the slack out of the opposed threads.
  • the opposed members v-8 and I'9 form a crushing cavity, the member 3 being gyrated with the head l, and the upper or bowl member I9 being normally xed.
  • a purpose of the present invention is to provide a suitable yielding release for permitting the whole bowl structure and with it the upper ring II 9 to tilt upwardly away from the head when an uncrushable member or mass becomes posishown between the outer surface IIb of the flange Il and the opposed part of the ring i5,Y
  • I do provide suiii-cient clearance to permit an upward tilting movement ci one side of the ring I5, the diametrically opposed side serving as a pivot.
  • I provide a plurality of cylinders, each ⁇ with its associated piston. Whereas my system may under some circumstances operate hydraulically, I describe and show it herein as a pneumatic system. As a matter of convenience, I provide a plurality of downwardly open-ended cylinders 23. EachY such cylinder is shown as downwardly open with an upwardly extending centering member 23 entering an appropriate aperture in flange la.
  • the cylinders may be held imposition for example by receivingrthe screw-threaded lower ends of some of the locke ing screws I2. ⁇ Whereas Iinay arrangethe cylinders 25 in a variety of positions or arrangements, I nd itadvantageous to arrange them in pairs, as shown in Figure 2, the lpairs of cylinders being separated generally uniformly about-the exterior of the circumferential main frame member I, to which they are closely adjacent.
  • Each cylinder receives an upwardly extending hollow open-topped piston 23.
  • These pistons are shown arranged in pairs, as shown for example in Figure '7, each pair O fpistons 28 being secured by'means of screws 29a to a bottoml yoke 29.
  • Each piston ⁇ is provided with an O ring type packing 23a,l located ina. groove as shown in Figure 4.
  • Each yoke has a central hub through which passes the lower end of the tension member orrod 3l.
  • each such rod has a screwthreaded lower portion to which is adjustably arranged va nut 32 having a generally spherical upper face 32a, opposed'to a correspondingly spherical face 30a at they bottom of the hub 30.
  • the hub is apertured asat 36h, the aperture 'being suicient to provide, at all normal positions, a clearance between the tension member or rod 3l and any part of the hub. All contact is between the opposed spherical surface 33a and 32a.
  • Each rod 3l passes upwardly through appropriately large apertures in the ila-nge In, and the ring 9, and also through an outwardly extending lug of the ring I3...
  • each such lug is aperturedas at35a and is provided with an upwardly concave top spherical surface 35D.
  • Each tension member 3l has a top head 3m, with a sphericalor ball surface SIb; It will be understood that sunicient pressure is maintained within the cylinders 25 to urge the pistons 28 downwardly with sumcient force to hold the ring. I3 normally fixed in the position in which it is shown in Figure 1.
  • the ring I3 will tilt upwardly and either free theuncrushable material or at least prevent breakage.
  • the parts are so proportioned that at no normal position will there be any contact between the rods or tension members 3l and the hubs 30. or the. iiange la or the ring 9 or the ⁇ lugs 35.
  • The, opposed balland socket joints at the upper and lower ends oi the rods 3l provide a uniform unit pressure on the socket joints and auniform tension on the rods 3i.
  • I illustrate a single pressure sup-ply line opening for the entire system. It will be understood, however, that in crushers of large size, it may be practical to have two or more supply inlets.
  • I illustrates any suitable source of pressure from which a suitable fluid, such as air, may be delivered to a supply pipe generally indicated at Iii. This supply pipe is shown as having a release valve assembly 32, for exhausting to the atmosphere. It also has in communicationwith it any suitable pressure gauge 43.
  • the supplypipe 4I is shown as delivering air under pressure, through the elbow Ma, to the interior of one of the cylinders 25.
  • Eachl pair or cylinders is shown as connected by a communication duct 42.
  • Each such duct is held against unintended endwise movement by any suitable, removable locking member 43, which is secured to or forms part of one of the cylinders of each pair. I nd it advantageous that the duct 42 be slidable in relation to the opposite cylinder of each pair, in order to compensate automatically for variations in distance between.
  • the entire series, or sub-groups of cylinders may be connected to the compressor 40, or to any other suitable source of pressure.
  • the individual pistons 28 are shown, as in Figure 4, with cylindrically surfaced upper portions, in which any suitable sealing rings 28a may be recessed.
  • a lubricant may be applied to any suitable tting 45 communicating with the exterior lubricating hollow 45a of each piston 28. This also has for oneresult to prevent corrosion.
  • 53 illustrates an alternative connection to any suitable plant air supply.
  • 5i is an emergency valve which can be closed.
  • 52 in Figure 6 is any suitable.
  • relief valve which can be set to the maximum permissible pressure.
  • 53 is any suitable exhaust valve.
  • the valves d2 and 53 may be employed to drain moisture from the system.
  • I illustrate a simple and e'lcient pneumatic release system which may be applied advanta tively flat, obtusely conic ring 8 is gyrated toward i and away from the normally fixed and also obtusely conic ring or element I9. It will be undervstood that the shapes and conformities and proportions of the opposed crushing elements may be widely varied. Any crusher where a bowl structure needs to be released in response to excess crushing stresses is a proper crusher for the application of this release.
  • I employ a plurality of downwardly open, generally cylindrical cylinders adapted to exert an upward thrust against the lower side of the main frame
  • the cylinders may at 450 lbs. per sq. in. pass tramp iron and the like, and if the maximum permissible pressure is 475 lbs., I set the relief valve 52 to operate at 475 lbs., thereby dropping the pressure at least to 450 lbs.
  • said means including a plurality of open-ended cyl:- inders spaced circumferentially about the crush-7 er, and means for normally xedly securing them to one of said relatively tiltable members, pistons moving in each cylinder and including portions extending outwardly through the open ends of the cylinders, a plurality of tension members extending from a level above the upper of said relatively tiltable elements to a level below the lower of said relatively tiltable elements, and means for exibly securing each said tension member atene end in relation to one of said:V
  • Vclaim 1 characterized in that the open-ended cylinders are secured in relation to and beneath the flange on the main frame with their open ends down, and in that the tension members are exibly secured at their upper ends to the bowl supporting ring.
  • a pneumatic release for gyratory Crushers and the like and in combination with the circumferential main frame of such a crusher, a circumferential flange on an upper portion of said main frame, and a bowl supporting ring tiltably mounted above said ange and in vertical alignment therewith, a bowl supported on said ring, and a crushing head mounted within said frame and means for gyrating said crushing head, the opposed head and bowl defining together a crushing cavity, and means for releasably urging said ring downwardly against said flange, while permitting it to tilt upwardly in relation thereto, in response to excess crushing stresses, at any point about the circumference of the main frame, said means including a plurality of open-ended cylinders spaced circumferentially about the Crusher and normally xed below the circumferential flange, the open-ended cylinders being downwardly open, pistons movable in each cylinder, said pistons including por tions extending downwardly through the open ends of the cylinders, tension members extending from
  • said means including a plurality of cylinders spaced circumferentially about the crusher, and means for normally xedly securing them to one of said relatively tiltable members, pistons vmoving in each cylinder and forming with the Acylinder above the piston a single air pressure chamber, said pistons including portions extending outwardly from -an end of each cylinder, a plurality of tension members extending from a level above the upper of said relatively tiltable elements to a level below the lower of said relatively tiltable elements, and means for flexibly securing -each said tension member at one end in relation to one of said pistons and at the other end in relation to the relatively tiltable member opposite the member to which the cylinders are nxed, ducts connecting a plurality of said air pressure chambers in a common pneumatic system, and means for supplying a predetermined air pressure to such system.
  • each Asaid system including a lubricant supply unit in communication with the clearance space between a piston and cylinder and an annular groove in said piston in communication with said -lubricant supply unit.
  • a yielding release assembly for crushers and the like, an open-ended cylinder and means for securing it to a part of the crusher, a piston movable in said cylinder and means for securing said piston to a part of the crusher movable in ⁇ relation to the Apart of the crusher to which the cylinder is secured, a circumferential .seal extending about the clearance space between the piston and the cylinder and means located between said seal and the open end of the cylinder for lubricating the clearance space between piston and cylinder, said means including a lubricant supply unit connected to said cylinder, a passage in the wall of said cylinder adapted to place said lubricant supply unit in communication with said clearance space, and an annular groove in the wall of said piston adapted for registration with said passage during a portion of the movement of said piston within said cylinder.
  • each said air connection including a duct secured to one cylinder and in slidable relation with another.
  • said means including a plurality of piston and cylinder assemblies spaced circumferentially about the crusher, said assemblies including cylinder members and piston members movable in relation to said cylinder members, means for securing said cylinder members to one of said relatively tiltable elements and means for securing said piston members to the other'of said relatively tiltable elements, one
  • each said tension member at one end in relation to one member of said cylinder and piston assembly and at the other end in relation to the relatively tiltable element opposite the element to which the other member of said piston and cylinder assembly is fixed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
US259940A 1951-12-05 1951-12-05 Pneumatic release for crushers Expired - Lifetime US2679984A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US259940A US2679984A (en) 1951-12-05 1951-12-05 Pneumatic release for crushers
FR1069105D FR1069105A (fr) 1951-12-05 1952-11-04 Broyeur à noix giratoire

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US314410XA 1951-12-05 1951-12-05
US1069105XA 1951-12-05 1951-12-05
US259940A US2679984A (en) 1951-12-05 1951-12-05 Pneumatic release for crushers

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US2679984A true US2679984A (en) 1954-06-01

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FR (1) FR1069105A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787425A (en) * 1952-12-12 1957-04-02 Nordberg Manufacturing Co Pneumatic release for gyratory crushers
DE1056455B (de) * 1956-03-02 1959-04-30 Westfalia Dinnendahl Groeppel Hydraulische Abstuetzung fuer Zerkleinerungsmaschinen
US2925959A (en) * 1954-02-24 1960-02-23 Nordberg Manufacturing Co Pneumatic release recharging means
US2972448A (en) * 1958-07-29 1961-02-21 Mercer M Dorsey Crusher bowl locking means
US3038670A (en) * 1958-03-24 1962-06-12 Nordberg Manufacturing Co Hydraulic release for gyratory crushers and the like
US3118623A (en) * 1961-01-09 1964-01-21 Louis W Johnson Rock crusher
US3204883A (en) * 1962-08-08 1965-09-07 Harber Greene Company Locking means for crushers
US3337143A (en) * 1963-11-12 1967-08-22 Louis W Johnson Rock crusher
US3397846A (en) * 1966-12-02 1968-08-20 Archer Fred Curtis Hydraulic release for gyratory crushers
US3459383A (en) * 1966-12-23 1969-08-05 Barber Greene Co Clamping and release means for crusher bowls
US3754716A (en) * 1971-01-01 1973-08-28 Pegson Ltd Gyratory crushers
US3804342A (en) * 1972-03-01 1974-04-16 Rexnord Inc Crusher release clearing system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1193200A (en) * 1916-08-01 Turing
US1342273A (en) * 1919-08-02 1920-06-01 Blache Hans Henrik Lubricating system for internal-combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1193200A (en) * 1916-08-01 Turing
US1342273A (en) * 1919-08-02 1920-06-01 Blache Hans Henrik Lubricating system for internal-combustion engines

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2787425A (en) * 1952-12-12 1957-04-02 Nordberg Manufacturing Co Pneumatic release for gyratory crushers
US2925959A (en) * 1954-02-24 1960-02-23 Nordberg Manufacturing Co Pneumatic release recharging means
DE1056455B (de) * 1956-03-02 1959-04-30 Westfalia Dinnendahl Groeppel Hydraulische Abstuetzung fuer Zerkleinerungsmaschinen
US3038670A (en) * 1958-03-24 1962-06-12 Nordberg Manufacturing Co Hydraulic release for gyratory crushers and the like
US2972448A (en) * 1958-07-29 1961-02-21 Mercer M Dorsey Crusher bowl locking means
US3118623A (en) * 1961-01-09 1964-01-21 Louis W Johnson Rock crusher
US3204883A (en) * 1962-08-08 1965-09-07 Harber Greene Company Locking means for crushers
US3337143A (en) * 1963-11-12 1967-08-22 Louis W Johnson Rock crusher
US3397846A (en) * 1966-12-02 1968-08-20 Archer Fred Curtis Hydraulic release for gyratory crushers
US3459383A (en) * 1966-12-23 1969-08-05 Barber Greene Co Clamping and release means for crusher bowls
US3754716A (en) * 1971-01-01 1973-08-28 Pegson Ltd Gyratory crushers
US3804342A (en) * 1972-03-01 1974-04-16 Rexnord Inc Crusher release clearing system

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Publication number Publication date
FR1069105A (fr) 1954-07-05

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