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
  • B02C1/00—Crushing or disintegrating by reciprocating members
  • B02C1/02—Jaw crushers or pulverisers
  • B02C1/025—Jaw clearance or overload control

Definitions

• the invention relates to a jaw crusher according to the preamble of patent claim 1.
• a jaw crusher which has a stationary jaw and a pivoting jaw, which is pivotally mounted about an axis lying at its upper end.
• a hydraulic piston-cylinder unit engages on this, which is articulated at one end to the pivoting jaw and at its other end to the frame receiving the two breaker jaws.
• the working stroke of the piston-cylinder unit should be adjustable, for example, in a range between 20 to 40 mm, without this document indicating, from which reference this area emanates.
• a jaw crusher is described with a pivoting jaw, which is pivotable with the interposition of a toggle joint of a hydraulic piston-cylinder unit about an axis located in the region of the upper end of the pivoting jaw.
• To adjust the grain size of the comminuted material is provided to change the Brechspaltweite the length of the working stroke of the hydraulic piston-cylinder unit to change, but this is not possible during operation of the jaw crusher.
• a jaw crusher described in US Pat. No. 1,863,492 contains a stationary crusher jaw and a pivoting jaw, which can be pivoted about a pivot axis that can be fixed in two positions.
• the drive of the swivel jaw takes place by means of a flywheel driven via a belt drive, which drives an eccentrically mounted drive block to an oscillating movement in the direction of the swivel jaw.
• the drive block can be positioned in four positions and is equipped to change the crushing gap width with four different deep grooves into which a contact rod acting on the swivel jaw can be inserted.
• a change in the crushing gap width is possible only when the jaw crusher is stationary. Before restarting the jaw crusher, the crushing space between the jaws must be emptied, which is only possible from above. This also applies in the case of a material jam between the two jaws, since without such emptying the flywheel can not be set in rotation and therefore can not perform its function as an energy store.
• control device includes a control unit acting on the piston-cylinder unit, with which a limited, constant pivoting range of the pivoting jaw is adjustable within the range of the lower and upper pivoting range limit values.
• a jaw crusher with a hydraulic piston-cylinder unit whose hydraulic cylinder is pivotally mounted and whose oscillating from the hydraulic cylinder extendable and retractable into the cylinder piston rod is also pivotally mounted, characterized in that means of the control unit predetermined length of the working stroke of the piston rod is adjustable, wherein the position of this working stroke is within the range of the maximum Verstellhubes the piston rod and thus within the range of the lower and upper limits of the pivoting range of the swivel jaw.
• Figure 1 shows a schematic representation partially in section a jaw crusher
• Figure 2 shows an isometric view of a working cylinder, a control unit and a control valve unit containing unit of the jaw crusher according to the invention
• Figure 3 is a plan view of the unit shown in Figure 2;
• Figure 4 shows an enlarged view of a sectional view of the control unit in a first control position
• FIG. 5 shows a sectional view of the control unit in a second control position
• FIG. 6 shows the hydraulic circuit diagram of the jaw crusher according to the invention
• FIG. 7 is a diagram illustrating the relation between the maximum possible one
• FIG. 8 is a diagram showing the relation between the maximum possible adjustment stroke and the actual working or working jaw in the jaw crusher according to the invention.
• the jaw crusher shown in FIG. 1 contains a crusher housing 1, a stationary crusher jaw 2, a swiveling jaw 3 pivotable about the axis 4 and a hydraulic cylinder 5 pivotable about an axis 5.1 as a drive element whose piston rod 5.2 is articulated on the swivel jaw 3 in the area of the axle 5.3 ,
• the hydraulic cylinder 5 is provided with a bearing eye 5.4 associated with the axle 5.3.
• On the piston rod 5.2 a 5.3 associated bearing eye 5.5 is attached.
• a control device with which the Brechspaltweite between the two breaker jaws 2 and 3 is adjustable between upper and lower limits, includes a control unit 6 and a control valve unit 7, which are preferably attached directly to the hydraulic cylinder 5.
• the control unit 6 shown in Figures 4 and 5 in two different working positions includes a first cylinder housing 8 and a coaxially adjoining second cylinder housing 9, whose inner diameter is preferably greater than the inner diameter of the cylinder housing 8.
• a spool 10 is sealing slidably mounted.
• the spool 10 is provided with an axially extending inner bore 10.1, which has an inner ring gear at least over part of its length. In this inner ring gear engages an outer ring gear of a pin 11 which can be set in rotation by means of an outside of the cylinder housing 8 adjusting wheel 12.
• the spool 10 is provided with a circumferential groove 10.2 and forms part of a 4/2-way valve 16 with the four terminals Y, Yi and X, Xi, see also Figure 6, such that the circumferential groove 10.2 oscillating the terminals Y, Yi or X, Xi may be opposite.
• spool 10 coaxially connects to a threaded spindle 13, which is guided in a nut 14.
• This nut 14 is fixed coaxially to a control rod 15 which is displaceably mounted in the second cylinder housing 9 and which is provided with an inner bore 15.1 which extends over part of its length and adjoins the nut 14.
• control rod 15 is rigidly connected to the free end of the piston rod 5.2 by means of the rocker 17 shown in Figures 2, 3 and 6.
• the hydraulic cylinder 5 shown schematically in FIG. 6 is connected with its working piston 5.6 via the 4/2-way valve 20 forming part of the control valve unit 7 to the hydraulic connections P and T.
• the hydraulic cylinder 5 is supplied with hydraulic fluid from the hydraulic connection P via the line A in such a way that the working piston 5.5 extends with the piston rod 5.2 in the direction of the arrow fi and carries out its working stroke, to press the swivel jaw 3 in the direction of the stationary crusher jaw 2.
• the lying below the working piston 5.5 space of the hydraulic cylinder 5 is depressurized via the line B in the direction of the hydraulic port T.
• the 4/2-way valve 20 is moved to its second valve position to pressurize the space located below the working piston 5.5 of the hydraulic cylinder 5 via line B with hydraulic fluid and the working piston 5.5 in Move direction of the arrow f 2 and thus retract the piston rod 5.2 in the hydraulic cylinder 5.
• the hydraulic fluid located above the working piston 5.5 is demanded back through the line A in the direction of the hydraulic connection P.
• the 4/2-way valve 20 is controlled between its two valve positions of a part of the control unit 6 forming 4/2-way valve 16, via the dashed lines shown control lines X, Xi on the one hand and Y, Yi on the other hand to the 4/2-way valve 20 is connected.
• the designations X, Xi and Y, Yi indicate that the respective control lines are alternately flowed through in opposite directions by hydraulic fluid.
• the spool of the 4/2-way valve 20 is adjusted accordingly, so that the hydraulic cylinder 5 is alternately acted upon in opposite directions with hydraulic fluid, such that the working piston 5.5 and the Piston rod 5.2 executes either in the direction of the arrow fi the working stroke or retracts in the direction of the arrow f 2 again in the hydraulic cylinder 5.
• the means of the rocker 17 rigidly connected to the piston rod 5.2 control rod 15 of the control unit 6 follows the movement of the piston rod 5.6.
• the movement of the control rod 15 following spool 10 of the 4/2-way valve 16 is reciprocated between its two either the terminals X, Xi or the terminals Y, Yi opposite end positions, so that by the dashed lines shown control lines that the hydraulic cylinder 5 associated 4/2-way valve 20 of the control unit 6 is adjusted accordingly and thereby the flow of hydraulic fluid is controlled in or out of the hydraulic cylinder 5.
• the Brechspaltweite can be set between a minimum value represented by Figure 4 and a maximum value represented by Figure 5, of course Intermediate positions between the two extreme values according to FIGS. 4 and 5 are possible.
• Check valves 23 and 24 located in the area of the control unit 16 are provided to prevent overloading of the control line system.
• Line branches XA and XB are used to connect the 4/2-way valve 16 to the lines A and B.
• a pressure limiting valve 22 is provided as a overload-securing element of the line branch B.
• the line Ti connecting the 4/2-way valve 16 to the hydraulic connection T serves to recover any leakage hydraulic fluid that may occur in the region of the 4/2-way valve 16.
• the possibility is created of using e.g.
• the maximum possible stroke length of the piston-cylinder unit of 100 mm is to set the actual working or breaking stroke to specific ranges within the maximum possible stroke length.
• a Häg. Breaking stroke of 40 mm can be set within the range of the maximum possible stroke length of 100 mm.
• the oscillating lifting movement, i. H. the working stroke of the working piston is set in the range between 60 mm and 100 mm.
• FIGS. 6 and 7 serve to explain the working or operating mode of the jaw crusher described in DE 44 00 922 A1 in comparison to the jaw crusher 1 according to the invention.
• the crushing gap width required for this must be set to a maximum value of 100 mm and the working piston must have a working or a breaking stroke of 100 mm.
• the working stroke length must also be set to corresponding values of 40 mm, 70 mm or 100 mm in order to obtain a particle size range of ⁇ 40 mm or ⁇ 70 mm or ⁇ 100 mm.
• the jaw crusher according to the invention it is sufficient for the jaw crusher according to the invention to change the position of the working stroke by gap offset, i. with a scheduled working stroke of e.g. 40 mm, the working stroke of the piston rod 5.2 or the working piston 5.5 by changing the position of the control rod 15 between the two shown in Figures 4 and 5 extreme positions, for example in the range I between> zero mm to 40 mm or in the area II be set between 30 mm to 70 mm or in the range III between 60 mm to 100 mm to obtain a comminuted product with a particle size range> 40 mm or> 70 mm or> 100.
• gap offset i. with a scheduled working stroke of e.g. 40 mm
• the working stroke of the piston rod 5.2 or the working piston 5.5 by changing the position of the control rod 15 between the two shown in Figures 4 and 5 extreme positions, for example in the range I between> zero mm to 40 mm or in the area II be set between 30 mm to 70 mm or in the range III between
• the working stroke must be set to 100 mm in order to achieve a product with a particle size range ⁇ 100 mm, a working stroke of e.g. 40 mm, which is between the limits of 60 and 100 mm in order to achieve a maximum size of the breaker gap width and thus to obtain a comminuted product in the grain size range> 100 mm.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Food Science & Technology (AREA)
• Crushing And Grinding (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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Citations (5)

• 2012
  • 2012-06-12 DE DE102012105033A patent/DE102012105033A1/de not_active Withdrawn
• 2013
  • 2013-06-07 PT PT137416608T patent/PT2861348T/pt unknown
  • 2013-06-07 WO PCT/DE2013/100206 patent/WO2013185754A1/de active Application Filing
  • 2013-06-07 PL PL13741660T patent/PL2861348T3/pl unknown
  • 2013-06-07 TR TR2018/09590T patent/TR201809590T4/tr unknown
  • 2013-06-07 ES ES13741660.8T patent/ES2676225T3/es active Active
  • 2013-06-07 EP EP13741660.8A patent/EP2861348B1/de active Active

Patent Citations (5)

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