FR2580954A1 - CIRCULAR CHAMBER CRUSHER - Google Patents

Abstract

THE PRESENT INVENTION RELATES TO A CIRCULAR CHAMBER CRUSHER OF THE TYPE CONTAINING A FRAME, A CRUSHING NUT 2 FIXED ON A SHAFT 3 OF VERTICAL AXIS AND A CRUSHING RING 4 FIXED AROUND THE NUT AND HAVING THE SAME AXIS, THE CRUSHING OF THE MATERIALS INTRODUCED BETWEEN THESE TWO PIECES BEING CARRIED OUT BY THE MOVEMENT OF THE WALNUT IN RELATION TO THE CRUSHING RING CHARACTERIZED BY: -A DRIVE MEANS PRODUCING A VERTICAL OSCILLATORY MOVEMENT LINKED TO SHAFT 3 TO DRIVE IT INTO ONE SUCH MOVEMENT; -A MEANS OF GUIDING 5 OF SHAFT 3 IN ITS VERTICAL OSCILLATORY MOVEMENT.

Description

The present invention relates to a crusher with a circulating chamber

  shutter of the type comprising a frame, a grinding part called grinding nut fixed on a shaft with a vertical axis and another part

  annular in shape called grinding ring fixed around the pre-

  and having the same axis, the grinding of the materials introduced between these two parts being carried out by the movement of the nut

  grinding with respect to the grinding ring.

  In this type of crusher, we know the gyratory crushers whose grinding nut, which often has a conical shape, is fixed

  on a vertical tree. This tree is animated by a pendulum movement.

  re, it can turn on itself with respect to a point located at--

  above the grinding ring and on the same axis as the latter,

  while the lower end of said shaft is rotated

  tion in an eccentric itself mounted in rotation in the crusher frame on the axis of the ring. The pendulum movement of the shaft is obtained by the fact that the eccentric is driven in rotation.

  The materials introduced into the crusher are crushed between the year

  neau and the grinding nut by the continuous movement of spacing and approximation of each point of the outer periphery of the nut

  relative to the inner periphery of the grinding ring.

  The nut and the tree that supports it can be moved

  ment of axial translation which can occur for three reasons: -to adjust the granulometry of the crushed materials -to catch the wear of the ring and the nut

  -to avoid destruction in the event of the introduction of imbedded bodies-

  or jamming in the crusher.

  In this type of crusher two problems arise - the complexity of the drive and safety mechanism which results in a high production cost and costly maintenance. -the seal between the tree supporting the nut on one side and a

  on the other side the part of the frame containing the drive mechanism

  ment of said tree (see FR 2 398 543).

  The present invention aims to overcome these drawbacks by proposing

  another kind of movement of the grinding nut, and other solu-

  Technical aions related to this provision.

  To this end, the crusher which is the subject of this invention is essentially characterized by:

  -a drive means producing a green oscillatory movement-

  tical linked to the tree which supports the grinding nut for the

  4ri ner in such a movement, -a guide means of said shaft in its vertical oscillatory movement, -an upper part of the frame, on which the grinding ring is fixed, and which is mounted non-fixed. This part is nested by

  sliding in the lower part of the frame and stopping

  tees in place by pressing an outer ring on shoulders fixed on the lower part to position the grinding ring

compared to the grinding nut.

  - A grinding chamber acting by alternating approximation and

2r promoting self-grinding.

  The present invention will be better understood on reading the desc-

  riptiori detailed below, illustrated by drawings in which

  FIG. 1 is a diagram of the principle of the crusher.

  FIG. 2 is a view taken along AA of FIG. 1.

  r The crusher according to the invention comprises a frame (1) comprising an upper part (6) mounted not fixed on a part (7) which is lower than it, said upper part slides in the part (7). It stops in place by pressing on an outer ring (8) on shoulders (9) fixed in the part (7); shims (12)

  qo introduced between the outer ring (8) and the shoulders (9) can-

  wind change the height of part (6) relative to part (7). Elastic members, for example compression springs (10)

  press down on said upper part (6) of the frame.

  An annular part (4) called grinding ring and whose inner surface has a conical shape with the top directed upwards, is fixed inside the upper part (6) of the frame. o A grinding piece (2) in the form of a straight truncated cone whose small base is at the top, called grinding nut, is fixed to a shaft (3) whose axis is vertical. Said shaft is driven in a vertical oscillatory movement by connection with a means

  drive producing such movement and guided in this movement

   f ment by a guide means for example a sleeve (5).

  In one embodiment, the drive means is a device

  eccentric sitive (14) whose cake is linked to a horizontal tree-

4 2580954

  tal (11) entralné in rotation, this shaft is guided by bearings

  (12) via the wear rings (13).

  The collar (25) of the eccentric device (14) has an upper surface

  flat plane on which the vertical shaft presses and slides. This mechanical assembly is bathed in a lubricating liquid contained in a casing (5) constituting the lower part of the frame. Any conventional device can bring the said lubricating liquid to the level

  the vertical shaft (3) and its wear ring (16). The hori tree

  zontal (11) is rotated by means of a

  drive pulley (17) linked to a drive member not shown.

  A seal (16) ensures a continuous connection between the

  ter (15) and the horizontal shaft (11).

  An elastic member, not shown, presses down on the grinding nut to ensure permanent contact between the vertical shaft (3)

  and the eccentric device (14) during movement, a gasket

  seal (19) placed between the sheath (5) and the grinding nut

  protects the vertical shaft (3) against dust.

  The position of the grinding ring relative to the grinding nut can be adjusted using the shims (12). This setting is used to control

  the granulometry of the crushed materials. These shims can be filled

  laced by hydraulic cylinders.

  The space formed between the outer surface of the grinding ring

  (4) and the grinding nut (2) constitutes the grinding chamber (20).

  Because the inner surface of the grinding ring has a generally conical shape, the average angle of the cone tip is less than that of the cone formed by the outer surface of the grinding nut, the inlet (21) of the grinding chamber (20) allows the passage of materials whose size is larger than those which can pass through the outlet (22) of said chamber. The materials to be ground are introduced through the inlet (21), are crushed

  between the two grinding pieces under the effect of oscillating movement

  vertical roof of the grinding nut (2) advance by sliding and by gravity on the external surface of said nut as and

  as their size decreases under the effect of these successive crushings

  stops and finally exit through the exit (22) once their size

permits.

  The inner surface of the grinding ring (4) can be formed

  killed by several conical surfaces, the lower of which has an angle at

  summit larger than the upper ones. It can also be for-

  seen from reliefs (23), these reliefs have a continuous circular shape.

  re. These arrangements of said surface have the following role: -to create reduced bearing surfaces, which increases the pressure

  on these surfaces when the grinding nut (2) approaches

  them, and therefore facilitates the grinding of materials which are difficult to grind.

  In the case of the introduction of a body which is very difficult to grind, said to be unburnable, the upper part (6) of the frame which carries the ring of

  grinding will be raised under the effect of the rise of the crushed nut-

  ge (2) despite the force exerted down on it by the compression spring (10). This increases the pressure on the said

  body and facilitates its evacuation through the outlet (22) given the arrangement

  tion of the inner surface of the grinding ring (4). If the

  unburnable body withstands the maximum pressure exerted, i.e.

  re when the hrcyage nut reaches its highest position,

  an alarm connected to the body exerting a force on the upper part

  riwjre (6) of the bee tRe. It is obvious that this alarm can be triggered either as soon as the grinding nut (2)

  reaches its highest position either from a predefined number

  ended of oscillations accompanied by an uprising of the said

  upper part (6) of the frame. This alarm can be. accompanying

  born or not by a stop of the motor organ. The force exerted by the compression spring (10) is adjusted according to the nature

materials to be ground.

  This spring can be replaced by any elastic member

  for example a hydraulic device and provided with an accumulator.

  The eccentric drive means can be replaced by a

  mechanical assembly "connecting rod-crank" or by a hydraulic assembly

  stiff with a hydraulic cylinder.

  In the embodiment detailed above, the frame (1) consists of three parts: the upper part (1) which carries the grinding ring (4) and which lifts in the case of introduction of a body very difficult to grind in the grinding chamber (20), the intermediate part (7) which carries the upper part, comprises

  the guide means (5) of the vertical shaft (3) and forms a cover

  the of the casing constituted by the lower part (15) to contain

  the horizontal shaft (11) and the eccentric (14) in a lubricated liquid

  confident and finally, one can easily notice that the outlet (22) of the grinding chamber (20) is isolated from the drive means, which avoids

  dust coming to it.

  The seal between the vertical shaft (3) and the dust zone

  reuse near a18 outlet (22) of the grinding chamber is easily ensured by means of the seal (19) mounted around the sheath (5) and contained in a symmetrical cavity (24) of a straight cylindrical wall made in walnuts

grinding (2) in its large base.

  The material of each constituent part of the crusher is

chosen according to its role.

  The lower surface of the vertical shaft (3) and the planar AO surface of the collar (25) of the eccentric device (4) must be made of a very hard material, the latter must also make these two surfaces slippery one by compared to each other. The embodiment which has just been described is given to

  <purely indicative title, the training means produced

  sant the vertical oscillatory movement can be achieved by any known or known techniques, the material of each organ of the crusher can be chosen from known or known materials to alleviate problems

  2- wear or friction or others.

  It goes without saying that the present invention can receive all arrangements and all variants without departing from the

of this patent.

Claims (1)

  R1 / Crusher with circular chamber of the type comprising a frame (1), a grinding part (2) called grinding nut fixed on a shaft (3) of a vertical axis and another annular part (4) called ring grinding fixed around the first and having the same axis, the grinding of the materials introduced between these two grinding parts being carried out by the movement of the part (2) relative to the ring (4), characterized by: -a drive means producing movement   vertical oscillatory linked to the shaft (3) for the drive ner in such a movement,   -a guide means (5) of the shaft (3) in its movement- vertical oscillatory ment.   R2 / Crusher according to claim i comprising a frame (1) characterized in that an upper part (6) of said frame is mounted not fixed relative to the frame and su-r which is fixed the grinding ring (4) , said part (6) being fitted by sliding in the part (7) of the frame which is lower than it and stopped in place   by pressing on an outer ring (8) on shoulders-   elements (9) fixed on the part (7) to position the an-   grinding neau (4) relative to the grinding part (2). ! 3 / Crusher according to claim 2 characterizes in that an elastic orqane exerts a predetermined force downwards vertically on the upper part (6) of the   crusher which carries the grinding ring.   R4 / Crusher according to claim 1 characterized in that   that the grinding ring (4) has an internal surface pre- feeling relief shapes.   R5 / Crusher according to claim 1 characterized in that   that the drive means is an excent- no rique (14).   R6 / Crusher according to claims 1 and 5 characterized   by an elastic member (not shown) pressing on the grinding nut (2) towards the bottom in order to ensure by this support the contact of the vertical shaft with the means e training.   R7 / Crusher according to claim 1 characterized in that the drive means is a mechanical assembly "crank rod".   R8 / Crusher according to claim 1 characterized in that   that the drive means is a hydraulic assembly than having a cylinder.   R9 / Crusher according to claim 1 and claim characterized in that the vertical shaft (3) presses and slides on a flat upper surface of the collar (25) of the eccentric device (14).