US 4,679,741 AGranted

Crusher with rotary plates

AssigneeFried. Krupp Gesellschaft mit beschrankter Haftung

InventorKolbjorn Hansen

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Abstract

A crusher with rotary crusher plates and a vertical main axis has plates (1,2) disposed one above the other and spaced apart to form between the plates an annular slot (4) having radial, outwardly converging crushing surfaces (1', 2'). Said plates are rotatable about axes (A,B) which are non-parallel; the lower plate (2) is driven and the upper plate (1) is provided with a central feed opening (3) with a feed funnel (5) projecting downwardly into the opening. During operation, the lower plate (2) is arranged to execute a simultaneous gyrating movement in an opposite direction in relation to its direction of rotation, the number of revolutions per minute of the gyrating movement being substantially higher than the number of revolutions per minute of the lower plate (2) about its axis of rotation (B). The crushing surface (2') of the lower plate (2) has a central, cone-shaped section (2") which projects upwardly into the central feed opening (3) of the upper plate (1). A particle introduced into the crusher is thereby subjected to crushing forces up to several times in the crushing slot before being flung out of the slot.

Claims16

Dependent claims

A crusher supported by a frame and having a vertical main axis, the crusher including crusher plates (1,2) disposed one above the other with the plates being spaced apart to form therebetween an annular crushing slot (4) with radial outwardly converging crushing surfaces (1',2'), the plates being rotatable about respective axes (A,B) which are non-parallel, the one plate (1) being provided with a central feed opening (3) having a feed funnel (5) projecting downwardly into the opening (3), and the other plate (2) being driven in rotation during operation while simultaneously executing a gyrating movement in a direction opposite to its direction of rotation, characterized in that

the other plate has a center of gravity and includes a downwardly projecting shaft having an upper end, said upper end and a lower end being adjacent said center of gravity and being rotatably and pivotably supported in a first spherical bearing (7), said first bearing having an axis which is coaxial with the axis of rotation of said other plate and being disposed within an upper region of a bearing housing (8) that is rigidly connected to said crusher frame, a lower region of said bearing housing rotatably supporting a rotary driven shaft (11), the lower end of said downwardly projecting shaft being supported in a second spherical bearing (10) that is eccentrically arranged on an upper end of said driven shaft, the axis of rotation of said driven shaft being coaxial with the axis of rotation (A) of said one plate, and
said downwardly projecting shaft being provided, at said lower end closely adjacent to, and above, said second spherical bearing (10), with a gear wheel (12), said bearing housing (8) including therein an internal rim gear (13), said gear wheel (12) being engaged with said rim gear (13), said gear wheel and said rim gear spacing said downwardly projecting shaft apart from said bearing housing,
so that when the gear wheel (12) rolls on the rim gear (13), said other plate rotates in a direction opposite its direction of gyrating movement.

A crusher, comprising:

a frame having a vertical main axis, an upper portion defining a material feed opening, and a lower portion including a rotatably driven shaft, both said opening and said driven shaft having longitudinal axes coincident with said vertical axis,
a first crusher plate,
means, mounting said first crusher plate on said frame upper portion below said feed opening, for permitting free rotation of said first crusher plate about an axis coincident with said vertical axis,
a second crusher plate disposed below said first crusher plate, said second crusher plate having a center of gravity and including a downwardly depending shaft having an annular gear disposed about a lower portion thereof, said second crusher plate being supported by said frame lower portion for rotation about a second axis that is skewed relative to said vertical axis,
said first and second crusher plates being spaced apart and forming therebetween an annular crushing slot with radially outwardly converging crushing surfaces,
a vertically extensive bearing housing having a longitudinal axis coextensive with said vertical axis, said bearing housing being supported by said frame lower portion and receiving said downwardly depending shaft,
said bearing housing including upper spherical bearing means, disposed adjacent said center of gravity of said second crusher plate, for rotatably and pivotably supporting an upper portion of said downwardly depending shaft;
lower bearing means, supported eccentrically on an upper portion of said driven shaft, for rotatably supporting a lower portion of said downwardly depending shaft;
and gear means disposed between said upper and lower bearing means, said gear means consisting of an annular rim gear engaging the annular gear --disposed about the lower portion of said downwardly depending shaft, said downwardly depending shaft being spaced apart from said bearing housing by said rim gear and annular gear,
so that as said driven shaft rotates in one direction, said annular gear rolls about said rim gear and causes said second crusher plate to gyrate in a direction of rotation opposite said one direction.

7 more elements

An apparatus for crushing material, comprising:

a support;
an upper crusher plate having a centrally disposed opening therein to receive material for crushing;
first means for rotatably mounting the upper crusher plate to the support, so that the upper crusher plate is freely rotatable about a generally vertical first axis that extends through the opening of the upper crusher plate;
a lower crusher plate which includes a cap member having top and bottom sides, and a shaft member having upper and lower ends and a second axis which runs through the upper and lower ends, the upper end of the shaft member being attached to the bottom side of the cap member;
second means for mounting the lower crusher plate to the support below the top crusher plate with the upper side of the cap member facing the upper crusher plate, the second axis extending through the opening of the upper crusher plate but being skewed relative to the first axis, the second means including bearing means for permitting the lower crusher plate to rotate about the second axis and to pivot about a predetermined pivot point that lies on the second axis at a position adjacent the upper end of the shaft member;
means for moving the lower end of the shaft member in an orbit that encircles the first axis, the orbital movement causing the lower crusher plate to pivot about the pivot point;
a fixedly mounted rim gear having an opening through which the shaft member extends, the rim gear being positioned between the upper and lower ends of the shaft member;
and
a gear, mounted on the shaft member, which engages the rim gear and rotates the lower crusher plate about the second axis as the lower end of the shaft member is moved along the orbit.

6 more elements

Dependencies are inferred from the claim text.