EP0276848A2 - Rotary breaker with protected projection blades - Google Patents
Rotary breaker with protected projection blades Download PDFInfo
- Publication number
- EP0276848A2 EP0276848A2 EP88101235A EP88101235A EP0276848A2 EP 0276848 A2 EP0276848 A2 EP 0276848A2 EP 88101235 A EP88101235 A EP 88101235A EP 88101235 A EP88101235 A EP 88101235A EP 0276848 A2 EP0276848 A2 EP 0276848A2
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- EP
- European Patent Office
- Prior art keywords
- rotor
- projection
- stones
- blade
- section
- 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.)
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Classifications
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
- B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
- B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
- B02C13/1842—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc with dead bed protected beater or impeller elements
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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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
- B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
- B02C2013/1885—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate of dead bed type
Definitions
- the present invention relates to the crushing of stones, with a view to obtaining fragments thereof.
- the essential problem posed for the production of crushers has long been that of their resistance to wear first by the stones then by their fragments and by the dust resulting from their crushing.
- known crushers include the following elements which are in themselves common to these crushers and to that according to the present invention: a rigid projection rotor having a vertical axis and provided with means for guiding it and driving it in rapid rotation about this axis, the direction of its rotation and the opposite direction constituting circumferentially front and rear directions, respectively, this rotor itself comprising: - a floor limited by an outer edge, - a ceiling limited by an outer edge, disposed above this floor and pierced with a central supply opening to continuously lower said stones into said rotor, - And walls connecting this floor to this ceiling. Some of these walls constitute projection vanes.
- Each of these blades extends horizontally from a reception zone formed over a part of its length near said axis to receive the stones which arrive through said central supply opening of the ceiling. It continues until a projection edge which is relatively far from this axis and which can be considered as constituting a longitudinally front end of this blade.
- a stone received on said receiving zone is rotated by this blade and then subjected to centrifugal force. It progresses under the action of this force along this dawn while receiving a thrust which gradually increases its circumferential speed. When it reaches said projection edge, it is projected tangentially to the outside.
- the dawn extends backwards, from da its said projection edge, circumferentially behind the natural slope line which is defined by this edge, the natural slope lines being the equilibrium lines of the accumulation slopes that the stones can form spontaneously under the action of the centrifugal force upstream of an obstacle which first opposes their flow.
- the position of such a line is defined by that of the flow threshold formed by this obstacle.
- This threshold is constituted by the projection edge.
- This line is approximately a logarithmic spiral around the axis of rotation, that is to say a curve whose tangent makes at all points the same angle with the radial plane passing through this axis and the point considered. This angle depends on the nature, the dimensions and the roughness of the stones to be broken, as well as the intensity of the centrifugal force which maintains the protective layer and which itself depends on the speed of rotation of the rotor.
- the angle in question, between the radial direction and the tangent to the natural slope line may for example be close to 110 or 120 degrees, and may vary slightly when the gaps between the stones of the protective layer are filled. gradually dust which results from the friction of new stones on this layer.
- the protective layer thus formed by the first stones protects the dawn, except the projection edge which constitutes the flow threshold, against any wear by the stones which then arrive.
- the projection edge is formed by a high hardness and / or replaceable part to slow down its wear and / or allow its easy replacement after wear.
- This piece has the shape of a vertical blade that can be called a projection blade. It is usually made up of two vertical bars of tungsten carbide superimposed and encased in steel supports which are bolted to the front section of the projection blade.
- peripheral walls of the rotor leave an outlet opening for the stones.
- An external receiving structure surrounds the projection rotor leaving an annular gap around it. It has hard shock surfaces to receive direct shocks from the stones thrown by this rotor and to break these stones by forming fragments of stones and dust. Some of these fragments return towards this rotor and give it shocks in return on its peripheral surface constituted by its peripheral walls and / or on the outer edges of said floor and ceiling. The dust is entrained by the air currents caused by the rotation of the rotor.
- the external receiving structure is usually a fixed stator, the shock surfaces of which may consist of hard plates called anvils, or by fragments of stones retained in the stator to reduce its wear.
- the rotors of known crushers described in the documents cited above have, at least as to their floor, a circular shape.
- the rotors of the Mac Donald, Barmac and SBM Wageneder documents also have an equally circular ceiling superimposed on the floor and a cylindrical peripheral wall joining the edge of this ceiling to that of this floor.
- the projection blades are arranged in moderate radial projection on the circular peripheral surface of the rotor which therefore forms, circumferentially at the rear of each of these blades, a sector in radial recess relative to this blade. A certain degree of protection is thus ensured in this sector by this blade against said return shocks.
- the projection blade is, on the contrary, disposed in radial recess relative to the circular peripheral wall of the rotor. It is then protected by the part of the circular peripheral wall which is located immediately in front of the said outlet opening. None protects the peripheral wall.
- the object of the present invention is to reduce the operating cost of a rotary crusher with self-protected projection vanes without harming the efficiency of this crusher.
- a crusher comprising the common elements mentioned above with the presence of a said recessed sector, this crusher being characterized in that in a said recessed sector extending circumferentially towards the rear from a point of maximum radius of said projection blade, said peripheral surface of the rotor progressively deviates radially inwards from a circle centered on said axis and passing through said point of maximum radius, so that at least a majority fraction of this recessed sector constitutes a protected sector in which this surface is protected against external wear due to said return shocks and to said dust entrained by said air currents.
- the present inventors have found - that the external wear of the rotor came mainly from fragments of stone rebounding from the shock surfaces of the stator, as previously explained, - that the trajectories of these stone fragments were random and fairly widely distributed in directions and positions in the annular space between the rotor and the stator, - but that the relative speeds of the fragments reaching the rotor had, relative to the latter, a relatively strong average circumferential component due to the rotation of the rotor, and relatively much weaker centripetal radial components, - that this circumferential component was the cause of the majority of the wear of the periphery of the rotor because a shock with strong tangential component on a steel plate acts by scraping and tears more material from this plate than a perpendicular shock, which acts by hammering, the energy absorbed being in the latter case more by local deformation of the material, without tearing, - that a significant part of the wear came from stone dust entrained by the air currents which result from the
- said peripheral wall and said edges of the floor and of the ceiling form, with respect to the circumferential directions, an average progressive retraction angle of between 1 and 30 degrees, and more preferably between 2 and 10 degrees.
- This average progressive retraction angle is the characteristic angle of a logarithmic spiral drawn around said axis and starting from said point of maximum radius to arrive at the rear end of said protected sector at the periphery of the rotor, this characteristic angle being the angle constant that the tangents to this spiral make with the tangents to the circles centered on this axis.
- the peripheral surface of the rotor can deviate below and / or beyond this spiral. This is the case if the peripheral walls of the rotor are made of flat sheets and if the edges of the floor and the ceiling follow these walls.
- the total angular extent of the sections of said peripheral walls located outside said protected sectors constitutes a minority fraction of the turn of said rotor so as to concentrate said external wear in limited sectors in which replacements and / or recharges can be carried out economically. on these walls.
- said progressive withdrawal continues until exceeding 10% of said maximum radius, and more preferably, substantially more.
- peripheral walls of the rotor are, at least mainly, constituted by said projection vanes, said outer edges of said floor and ceiling along these vanes outside said outlet openings.
- said rotor has in plan the general shape of a convex polygon having symmetry of order N around said axis, N being the number of said projection blades, this polygon comprising, for each of these blades, a short side extending along a front section of this blade with a front end constituted by said projection edge, the end rear of this small side being closer to said axis than this front end and connecting to a large side which constitutes a straight main section of the same blade, at least a front fraction of this main section still approaching said axis to form with said section before a said protected area.
- Such a polygonal shape is in fact easily achievable with cut and welded flat sheets.
- a rear fraction of said straight main section extends rearwards said front fraction of this section while gradually moving away from said axis to the vicinity of a front edge of said outlet opening of the next projection vane.
- this rear fraction is a minority fraction and experience shows that it can then constitute a complementary protected sector.
- said rotor has in plan the general shape of an equilateral triangle with cut corners, said projection vanes being three in number, three cut corners of this triangle being constituted by said front sections of said projection vanes , the three sides of this triangle being constituted by said main sections of these blades.
- blades could be two, four or five instead of three, which would correspond to a general shape in elongated parallelogram, or in square or pentagon with cut corners.
- each said projection blade comprises, in addition to said front and main sections, a rear section returning substantially radially inward of said projection rotor to stiffen this main section while retaining stones at the rear end of this section.
- the rotor comprises, circumferentially in front of each of said outlet openings, a protective element extending far enough to intercept fragments of dangerous stones which could break a part of high hardness forming said projection edge.
- said protective element in front of each of said outlet openings is a protective plate forming a substantially radial projection on the periphery of said projection rotor, so that said fragments of dangerous stones are intercepted substantially at an angle straight by this protective plate giving it frontal impacts, this protective plate being made up, at least on the front face of a material which is less hard than said high hardness part.
- this protection plate extends sufficiently downwards and upwards to also protect the lower and upper edges of said outlet opening.
- said protective plate forms, in plan, an obtuse angle with the part of said peripheral wall situated circumferentially just in front of it so as to deflect the external air streams which circulate, with respect to said projection rotor, at contact of this wall to move away from said outlet opening stone dust suspended in these air streams.
- said protection plate is connected to the rear end of said main section of said projection vane, said rear section of this vane being constituted by an extension of this protection plate towards the interior of said projection rotor between said floors. and ceiling of so as to allow the maintenance of this protective plate by means of this rear section.
- the first self-protected projection vane crusher according to the invention has a vertical axis A and it includes a projection rotor 1.
- the latter is mounted on a vertical shaft 2 provided with protected bearings which are not visible in the figure.
- This shaft is driven in rapid rotation, for example at 1110 revolutions per minute, by a motor 5 by means of pulleys 3A and 3B and belts 4.
- the rotor 1 has a floor 8 and a ceiling 9. The latter is pierced with a central circular opening in which engages a vertical chimney 6 channeling the stones from a hopper 7. This chimney is provided with a device 15 allowing its level in the rotor to be corrected as it is worn by the stones which constitute the material to be crushed.
- the stator of the first crusher is constituted by a horizontal circular crown 11 which constitutes the bottom of a stone box.
- a vertical cylinder 12 constitutes the external wall of this stator and of the crusher. It is shielded in its upper part, above the level of the crushed material 13. This consists of fragments of the stones which have been introduced into the hopper 7. A certain volume is retained in the stone box.
- the stator is closed around the chimney 6 by a horizontal shielded cover 14.
- the crushed material exits towards the lower part of the stator through the annular gap 10 existing between the rotor and the stone box. It is extracted through a conical bottom 17 then evacuated on a means of transport such as a belt conveyor, to a hopper or any other means of storage.
- FIG. 2 represents the same side view in axial section of a second crusher which may differ from the first only by its stator: the stone box 13 of the first is replaced in the second by anvils 19.
- the cylindrical casing of the stator 12 is then equipped with an anvil ring 18 allowing the anvils 19 to be nested and moved vertically by three ramps 18A arranged at 120 °.
- FIG. 3 represents a view in horizontal section of a polygonal rotor in which said number N is three.
- This rotor has practically the shape of an equilateral triangle with cut corners. The direction of its rotation is represented by an arrow F.
- This one-piece construction rotor consists of a horizontal ceiling 9 not visible in this view, a floor 8 also horizontal, made of very thick sheets, and vertical plates 20 , 21, 24, and 25 constituting three projection vanes. Each blade constitutes both a peripheral wall of the rotor and a guide and acceleration wall for the stones to be crushed. Each of these vertical plates constitutes a section of one of these blades.
- Each blade is mainly made up of a main section 20 comprising a majority front fraction 20A and a minority rear fraction 20B on either side of a point located at a minimum distance from the axis A.
- the front end of this section is welded to a front section 21.
- the latter forms a small side of said polygon and its front end is formed by the projection edge 22 which is for example located 47 cm from the axis A.
- the latter is formed on a projection blade 22A constituted by two superimposed removable pieces of steel 22B and 22C each comprising two vertical bars of tungsten carbide.
- One of these bars 22D or 22E constitutes a part of the edge 22 and the other such as 23 constitutes a part of a protective bar which increases the longevity of this part.
- the parts 22B and 22C are fixed to the fixed part of the front plate 21 by two bolts 31.
- FIG. 5 which represents a side view of the same front plate from the inside of the rotor makes it possible to see these two parts 22B and 22C superimposed, interchangeable, and carrying bars of partial tungsten carbide of identical characteristics such as 22D and 22E. Since wear occurs mainly in the middle of the front plate, this allows interchange parts 22B and 22C to increase longevity.
- the protective bars such as 23 can be replaced by a hard protective coating such as 23A formed on the exposed surface of each of two parts such as 22F similar to parts 22B and 22C.
- This coating advantageously consists of small rounded particles or tungsten carbide balls embedded in a binder such as a cobalt nickel alloy.
- the main section 20 of the blade comes by its rear end to limit the outlet opening 21A of the next projection blade.
- a protective plate 24 projects in front of this outlet opening. Its circumferentially front face is equipped with a removable wear plate 24B which carries screws 24C which allow it to be fixed using nuts 24D on the circumferentially rear face of the plate 24.
- This wear plate is made up hard alloy steel or chromium cast iron resistant to abrasion, while the rotor assembly is made of a less hard steel and easier to machine and weld. Said hard alloy steel is chosen to be both sufficiently ductile to withstand the most severe frontal impacts well, and sufficiently hard to resist erosion by scraping for a long time.
- the plate 24 thus equipped deflects the fragments which ricochet from the stator as well as the air streams loaded with dust and sand created by the rapid rotation of the rotor. In doing so it contributes to the protection of the projection blade 22A and it protects the edges of the floor 8 and of the ceiling 9 around the outlet opening.
- the radially outer end of the protective plate can be placed at a radius, that is to say at a distance from the axis A, slightly greater than that of the projection blade 22A as shown in FIG. 3. It can however also be placed at an equal radius or slightly lower (see fig. 8) while usefully protecting this blade, can be with the help of stones and the air stream exiting through the outlet opening 21A.
- Each protective plate 24 is placed practically in the radial position. It is connected to a minority rear fraction of the main section 20 of the previous projection vane with which it forms an obtuse angle favoring the deflection of the external air streams. This protective plate also extends inside the rotor. Its inner part 24A constitutes both a rear section of the projection vane, with a retaining role towards the rear of the protective layer, and a rear stiffener for the main section 20 of this vane.
- Each projection vane is equipped with at least one intermediate stiffener 25 projecting inwardly to reinforce the retention. Said receiving zone for the stones on this blade extends between these two stiffeners 24A and 25.
- Wear plates 26 protect the floor 8 in areas where it is not naturally protected by the layer of material held in the rotor. These wear plates are naturally held in place by centrifugal force, without bolting, thanks to cleats 27, 28, 29 fixed for this purpose to the floor.
- a hole 38 drilled in the floor 8 receives a solid disc 30 called a distributor.
- the latter has a diameter of the order of one third of that of the rotor, that is to say that of the circle circumscribed to the rotor. It projects from the floor 8 and has two functions: distributing the material received towards the projection vanes and fixing the rotor 1 on the axis of rotation 2, as will be explained with the aid of FIG. 7.
- the rotor 1 is carried and driven by means of its floor 8.
- the latter is itself carried and driven not directly by the shaft 2 but by a support plate 34 which is mounted by conventional mechanical means on the end superior of shaft 2, the diameter of which is much smaller.
- This carrier plate is separable from the rotor. It has a diameter slightly greater than half that of the floor 8 and its thickness is sufficient to give it all the desired rigidity. Its presence ensures the rigidity of the rotor while giving only a moderate thickness to the floor.
- the horizontal translational displacements of the rotor are prevented by the fact that the floor 8 comprises on the lower face, around its central hole 38, a central annular protuberance 40 which, when stationary, is inserted with very little play in a housing central 44 of the carrier plate 34 and which, in service, bears against the retaining shoulder 42 which constitutes the edge of this housing.
- the distributor 30 is fixed to the shaft by a single axial screw 33 disposed in an axial well 32 of this distributor. This well is filled in service with stones which protect the head of this screw against wear. A small gap is made between the peripheral surface of the distributor and the edge of the hole drilled in the floor 8. The latter is held by an intermediate washer 36 blocked under the distributor 30.
- the peripheral surface of this washer is slightly conical, in male cone with point downwards, and comes to bear precisely on the internal surface of the annular protuberance 40, which is machined according to a corresponding female cone. Under these conditions, the risk of wear of the intermediate washer 36 is very low since its position provides protection by the distributor 30 and the floor 8.
- the floor 8 and the ceiling 9 are respectively protected by removable wear plates 26 and 26A.
- Figure 8 is a horizontal sectional view of a rotor with five blades. There are elements similar to all the essential components of the previous rotor with three blades. These analogous elements are designated by the same reference numbers increased by 100.
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Abstract
Description
La présente invention concerne le concassage de pierres, en vue d'en obtenir des fragments. Le problème essentiel posé pour la réalisation des concasseurs est depuis longtemps celui de leur résistance à l'usure d'abord par les pierres puis par leurs fragments et par les poussières résultant de leur concassage.The present invention relates to the crushing of stones, with a view to obtaining fragments thereof. The essential problem posed for the production of crushers has long been that of their resistance to wear first by the stones then by their fragments and by the dust resulting from their crushing.
Pour résoudre ce problème des concasseurs connus comportent les éléments suivants qui sont en eux-mêmes communs à ces concasseurs et à celui selon la présente invention :
- un rotor de projection rigide présentant un axe vertical et muni de moyens pour le guider et l'entraîner en rotation rapide autour de cet axe, le sens de sa rotation et le sens opposé constituant des sens circonférentiellement avant et arrière, respectivement, ce rotor comportant lui-même :
- un plancher limité par un bord extérieur,
- un plafond limité par un bord extérieur, disposé au-dessus de ce plancher et percé d'une ouverture d'alimentation centrale pour faire descendre en continu lesdites pierres dans ledit rotor,
- et des parois reliant ce plancher à ce plafond.
Certaines de ces parois constituent des aubes de projection. Chacune de ces aubes s'étend horizontalement à partir d'une zone de réception formée sur une partie de sa longueur à proximité dudit axe pour recevoir les pierres qui arrivent par ladite ouverture d'alimentation central du plafond. Elle se continue jusqu'à une arête de projection qui est relativement éloignée de cet axe et que l'on peut considérer comme constituant une extrémité longitudinalement avant de cette aube. Une pierre reçue sur ladite zone de réception est entraînee en rotation par cette aube et soumise alors à la force centrifuge. Elle progresse sous l'action de cette force le long de cette aube tout en en recevant une poussée qui accroît progressivement sa vitesse circonférentielle. Quand elle atteint ladite arête de projection, elle est projetée tangentiellement à l'extérieur. Pour éviter l'usure de l'aube par ces pierres, on lui donne, en plan, une forme creuse d'autoprotection : l'aube s'étend vers l'arrière, à partir da sa dite arête de projection, circonférentiellement en arrière de la ligne de talus naturel qui est définie par cette arête, les lignes de talus naturel étant les lignes d'équilibre des talus d'accumulation que les pierres peuvent former spontanément sous l'action de la force centrifuge en amont d'un obstacle qui s'oppose d'abord à leur écoulement. La position d'une telle ligne est définie par celle du seuil d'écoulement formé par cet obstacle. Ce seuil est constitué par l'arête de projection. Les pierres qui arrivent les premières sur l'aube sont retenues dans le creux de celle-ci jusqu'à ce qu'elles forment une couche de protection dont la surface suit ladite ligne de talus naturel.To solve this problem, known crushers include the following elements which are in themselves common to these crushers and to that according to the present invention:
a rigid projection rotor having a vertical axis and provided with means for guiding it and driving it in rapid rotation about this axis, the direction of its rotation and the opposite direction constituting circumferentially front and rear directions, respectively, this rotor itself comprising:
- a floor limited by an outer edge,
- a ceiling limited by an outer edge, disposed above this floor and pierced with a central supply opening to continuously lower said stones into said rotor,
- And walls connecting this floor to this ceiling.
Some of these walls constitute projection vanes. Each of these blades extends horizontally from a reception zone formed over a part of its length near said axis to receive the stones which arrive through said central supply opening of the ceiling. It continues until a projection edge which is relatively far from this axis and which can be considered as constituting a longitudinally front end of this blade. A stone received on said receiving zone is rotated by this blade and then subjected to centrifugal force. It progresses under the action of this force along this dawn while receiving a thrust which gradually increases its circumferential speed. When it reaches said projection edge, it is projected tangentially to the outside. To avoid wear of the dawn by these stones, it is given, in plan, a hollow form of self-protection: the dawn extends backwards, from da its said projection edge, circumferentially behind the natural slope line which is defined by this edge, the natural slope lines being the equilibrium lines of the accumulation slopes that the stones can form spontaneously under the action of the centrifugal force upstream of an obstacle which first opposes their flow. The position of such a line is defined by that of the flow threshold formed by this obstacle. This threshold is constituted by the projection edge. The stones which arrive first on dawn are retained in the hollow of the latter until they form a protective layer, the surface of which follows said line of natural slope.
Cette ligne est approximativement une spirale logarithmique autour de l'axe de rotation, c'est-à-dire une courbe dont la tangente fait en tous points un même angle avec le plan radial passant par cet axe et le point considéré. Cet angle dépend de la nature, des dimensions et de la rugosité des pierres à casser, ainsi que de l'intensité de la force centrifuge qui maintient la couche de protection et qui dépend elle même de la vitesse de rotation du rotor.This line is approximately a logarithmic spiral around the axis of rotation, that is to say a curve whose tangent makes at all points the same angle with the radial plane passing through this axis and the point considered. This angle depends on the nature, the dimensions and the roughness of the stones to be broken, as well as the intensity of the centrifugal force which maintains the protective layer and which itself depends on the speed of rotation of the rotor.
L'angle en question, entre la direction radiale et la tangente à la ligne de talus naturel, peut être par exemple voisin de 110 ou 120 degrés, et peut varier légèrement en servie quand les interstices entre les pierres de la couche de protection se remplissent progressivement de la poussière qui résulte du frottement des nouvelles pierres sur cette couche.The angle in question, between the radial direction and the tangent to the natural slope line, may for example be close to 110 or 120 degrees, and may vary slightly when the gaps between the stones of the protective layer are filled. gradually dust which results from the friction of new stones on this layer.
La couche de protection ainsi formée par les premières pierres protège l'aube, sauf l'arête de projection qui constitue le seuil d'écoulement, contre toute usure par les pierres qui arrivent ensuite.The protective layer thus formed by the first stones protects the dawn, except the projection edge which constitutes the flow threshold, against any wear by the stones which then arrive.
L'arête de projection est formée par une pièce de haute dureté et/ou remplaçable pour ralentir son usure et/ou permettre son remplacement facile après usure. Cette pièce présente la forme d'une lame verticale que l'on peut appeler lame de projection. Elle est habituellement constituée par deux barreaux verticaux de carbure de tungstène surperposés et enchassés dans des supports d'acier qui sont boulonnés sur le tronçon avant de l'aube de projection.The projection edge is formed by a high hardness and / or replaceable part to slow down its wear and / or allow its easy replacement after wear. This piece has the shape of a vertical blade that can be called a projection blade. It is usually made up of two vertical bars of tungsten carbide superimposed and encased in steel supports which are bolted to the front section of the projection blade.
Circonférentiellement en avant de chaque arête de projec tion, des parois périphériques du rotor laissent une ouverture de sortie pour les pierres.Circumferentially in front of each projecting edge tion, peripheral walls of the rotor leave an outlet opening for the stones.
Une structure externe de réception entoure le rotor de projection en laissant un intervalle annulaire autour de celui-ci. Elle présente des surfaces de choc dures pour recevoir les chocs directs des pierres projetées par ce rotor et pour casser ces pierres en formant des fragments de pierres et des poussières. Certains de ces fragments reviennent vers ce rotor et lui donnent des chocs en retour sur sa surface périphérique constituée par ses parois périphériques et/ou sur les bords extérieurs desdits plancher et plafond. Les poussières sont entraînées par les courants d'air provoqués par la rotation du rotor.An external receiving structure surrounds the projection rotor leaving an annular gap around it. It has hard shock surfaces to receive direct shocks from the stones thrown by this rotor and to break these stones by forming fragments of stones and dust. Some of these fragments return towards this rotor and give it shocks in return on its peripheral surface constituted by its peripheral walls and / or on the outer edges of said floor and ceiling. The dust is entrained by the air currents caused by the rotation of the rotor.
La structure externe de réception est habituellement un stator fixe dont les surfaces de choc peuvent être constituées par des plaques dures appelées enclumes, ou par des fragments de pierres retenus dans le stator pour diminuer son usure.The external receiving structure is usually a fixed stator, the shock surfaces of which may consist of hard plates called anvils, or by fragments of stones retained in the stator to reduce its wear.
Des concasseurs connus de ce genre sont par exemple décrits par les documents de brevets US-A-3.174.697 (Bridgewater), US-A 3.970.257 (Mac Donald), ce dernier correspondant au document FR-A 2.201.928) (même nom), DE-U 8.630.185 (SBM Wageneder), et EP-A 0 101 277 (Barmac).Known crushers of this kind are for example described by patent documents US-A-3,174,697 (Bridgewater), US-A 3,970,257 (Mac Donald), the latter corresponding to document FR-A 2,201,928) ( same name), DE-U 8.630.185 (SBM Wageneder), and EP-A 0 101 277 (Barmac).
Les rotors des concasseurs connus décrits dans les documents cités ci-dessus ont, au moins quant à leur plancher, une forme circulaire. Les rotors des documents Mac Donald , Barmac et SBM Wageneder comportent en outre un plafond également circulaire se superposant au plancher et une paroi périphérique cylindrique joignant le bord de ce plafond à celui de ce plancher.The rotors of known crushers described in the documents cited above have, at least as to their floor, a circular shape. The rotors of the Mac Donald, Barmac and SBM Wageneder documents also have an equally circular ceiling superimposed on the floor and a cylindrical peripheral wall joining the edge of this ceiling to that of this floor.
Dans le document SBM Wageneder les lames de projection sont disposées en saillie radiale modérée sur la surface périphérique circulaire du rotor qui forme donc, circonférentiellement à l'arrière de chacune de ces lames, un secteur en retrait radial par rapport à cette lame. Un certain degré de protection est ainsi assuré dans ce secteur par cette lame contre lesdits chocs en retour.In the document SBM Wageneder the projection blades are arranged in moderate radial projection on the circular peripheral surface of the rotor which therefore forms, circumferentially at the rear of each of these blades, a sector in radial recess relative to this blade. A certain degree of protection is thus ensured in this sector by this blade against said return shocks.
Une telle disposition présente plusieurs inconvénients graves. L'un est que les lames de projection sont dangereusement exposées aux chocs en retour qui les cassent fréquemment en raison de la faible ductilité du matériau de haute dureté qui les constitue en général. Un autre inconvénient est que la paroi périphérique et les bords des plancher et plafond du rotor ne sont protégés contre les chocs en retour que sur un petit secteur circonférentiel à l'arrière de la lame de projection, c'est-à-dire sur une petite fraction dudit secteur en retrait. Un troisième inconvénient est que, même dans le secteur qui suit immédiatement la lame de projection, la paroi périphérique du rotor est usée par les poussières.Such an arrangement has several serious drawbacks. One is that the projection blades are dangerously exposed to return shocks which frequently break them due to the low ductility of the high hardness material which generally constitutes them. Another drawback is that the peripheral wall and the edges of the floor and ceiling of the rotor are only protected against back impact on a small circumferential sector behind the projection blade, that is to say on a small fraction of said secluded area. A third drawback is that, even in the sector immediately following the projection blade, the peripheral wall of the rotor is worn by dust.
Selon un mode de réalisation du document Mac Donald et selon le document Barmac la lame de projection est au contraire disposée en retrait radial par rapport à la paroi périphérique circulaire du rotor. Elle est alors protégée par la partie de la paroi périphérique circulaire qui est située immédiatement à l'avant de la dite ouverture de sortie. Rien ne protége la paroi périphérique.According to one embodiment of the Mac Donald document and according to the Barmac document, the projection blade is, on the contrary, disposed in radial recess relative to the circular peripheral wall of the rotor. It is then protected by the part of the circular peripheral wall which is located immediately in front of the said outlet opening. Nothing protects the peripheral wall.
En service de tels rotors présentent rapidement une usure extérieure importante. Cette usure est particulièrement grande sur le bord extérieur circulaire du plancher ainsi que, éventuellement sur celui du plafond. Elle apparait aussi sur la paroi périphérique cylindrique éventuelle. Le concasseur doit alors être arrêté et les pièces usées doivent alors être reconstituées par rechargement à l'arc électrique, ou être remplacées. Le coût d'exploitation du concasseur est sensiblement accru par ces opérations.In service, such rotors quickly exhibit significant external wear. This wear is particularly great on the circular outer edge of the floor as well as, possibly on that of the ceiling. It also appears on the possible cylindrical peripheral wall. The crusher must then be stopped and the worn parts must then be reconstituted by recharging with an electric arc, or be replaced. The operating cost of the crusher is significantly increased by these operations.
La présente invention a pour but de diminuer le coût d'exploitation d'un concasseur rotatif à aubes de projection autoprotégées sans nuire à l'efficacité de ce concasseur.The object of the present invention is to reduce the operating cost of a rotary crusher with self-protected projection vanes without harming the efficiency of this crusher.
Elle a aussi pour but de permettre une fabrication simple et peu coûteuse du rotor de ce concasseur tout en conférant à ce rotor la grande solidité qui est nécessaire en raison des efforts subis.It also aims to allow a simple and inexpensive manufacture of the rotor of this crusher while giving this rotor the great solidity which is necessary due to the forces undergone.
Elle a plus particulièrement pour but de diminuer le coût d'un rechargement et/ou remplacement des zones extérieures de ce rotor après usure de ces zones.It is more particularly intended to reduce the cost of recharging and / or replacing the external zones of this rotor after wear of these zones.
Elle a en même temps pour but de diminuer la vitesse de cette usure pour augmenter la durée de service de ce concasseur entre deux interruptions.At the same time, it aims to decrease the speed of this wear to increase the service life of this crusher between two interruptions.
Et elle a pour objet un concasseur comportant les éléments communs précédemment mentionnés avec presence d'un dit secteur en retrait, ce concasseur étant caractérisé par le fait que dans un dit secteur en retrait s'étendant circonférentiellement vers l'arrière à partir d'un point de rayon maximal de ladite lame de projection, ladite surface périphérique du rotor s'écarte progressivement radialement vers l'intérieur d'un cercle centré sur ledit axe et passant par ledit point de rayon maximal, de manière qu'au moins une fraction majoritaire de ce secteur en retrait constitue un secteur protégé dans lequel cette surface est protégée contre l'usure extérieure due auxdits chocs en retour et auxdites poussières entraînées par lesdits courants d'air.
Les présents inventeurs ont trouvé
- que l'usure extérieure du rotor provenait surtout des fragments de pierre rebondissant à partir des surfaces de choc du stator, comme précédemment expliqué,
- que les trajectoires de ces fragments de pierre étaient aléatoires et assez largement réparties en directions et en positions dans l'espace annulaire entre le rotor et le stator,
- mais que les vitesses relatives des fragments atteignant le rotor présentaient, par rapport à celui-ci, une relativement forte composante circonférentielle moyenne due à la rotation du rotor, et de relativement beaucoup plus faibles composantes radiales centripétes,
- que cette composante circonférentielle était la cause de la majorité de l'usure de la périphérie du rotor car un choc à forte composante tangentielle sur une plaque d'acier agit par raclage et arrache plus de matière à cette plaque qu'un choc perpendiculaire, qui agit par martelage, l'énergie absorbée l'étant dans ce dernier cas davantage par déformation locale du matériau, sans arrachement,
- qu'une partie sensible de l'usure provenait de poussières de pierres entraînées par les courants d'air qui résultent de la rotation du rotor, comme précédemment expliqué,
- et qu'une forme générale extérieure simple du rotor permettait de diminuer et de localiser efficacement l'usure externe liée à la fois à ladite composante circonférentielle moyenne des chocs en retour et aux poussières.And it relates to a crusher comprising the common elements mentioned above with the presence of a said recessed sector, this crusher being characterized in that in a said recessed sector extending circumferentially towards the rear from a point of maximum radius of said projection blade, said peripheral surface of the rotor progressively deviates radially inwards from a circle centered on said axis and passing through said point of maximum radius, so that at least a majority fraction of this recessed sector constitutes a protected sector in which this surface is protected against external wear due to said return shocks and to said dust entrained by said air currents.
The present inventors have found
- that the external wear of the rotor came mainly from fragments of stone rebounding from the shock surfaces of the stator, as previously explained,
- that the trajectories of these stone fragments were random and fairly widely distributed in directions and positions in the annular space between the rotor and the stator,
- but that the relative speeds of the fragments reaching the rotor had, relative to the latter, a relatively strong average circumferential component due to the rotation of the rotor, and relatively much weaker centripetal radial components,
- that this circumferential component was the cause of the majority of the wear of the periphery of the rotor because a shock with strong tangential component on a steel plate acts by scraping and tears more material from this plate than a perpendicular shock, which acts by hammering, the energy absorbed being in the latter case more by local deformation of the material, without tearing,
- that a significant part of the wear came from stone dust entrained by the air currents which result from the rotation of the rotor, as previously explained,
- and that a simple general external shape of the rotor allowed effectively reduce and localize the external wear linked both to said average circumferential component of the return shocks and to the dust.
De préférence, sur l'étendue de chaque dit secteur protégé ladite paroi périphérique et les dits bords du plancher et du plafond forment, par rapport aux directions circonférentielles, un angle de retrait progressif moyen compris entre 1 et 30 degrés, et de préférence encore entre 2 et 10 degrés.Preferably, over the extent of each said protected sector, said peripheral wall and said edges of the floor and of the ceiling form, with respect to the circumferential directions, an average progressive retraction angle of between 1 and 30 degrees, and more preferably between 2 and 10 degrees.
Cet angle de retrait progressif moyen est l'angle caractéristique d'une spirale logarithmique tracée autour dudit axe et partant dudit point de rayon maximal pour arriver à l'extrémité arrière dudit secteur protégé à la périphérie du rotor, cet angle caractéristique étant l'angle constant que font les tangentes à cette spirale avec les tangentes aux cercles centrées sur cet axe. Bien entendu, dans l'étendue du secteur protégé, la surface périphérique du rotor peut s'écarter en deçà et/ou au delà de cette spirale. Tel est le cas si les parois périphériques du rotor sont constituées de tôles planes et si les bords du plancher et du plafond suivent ces parois.This average progressive retraction angle is the characteristic angle of a logarithmic spiral drawn around said axis and starting from said point of maximum radius to arrive at the rear end of said protected sector at the periphery of the rotor, this characteristic angle being the angle constant that the tangents to this spiral make with the tangents to the circles centered on this axis. Of course, in the extent of the protected sector, the peripheral surface of the rotor can deviate below and / or beyond this spiral. This is the case if the peripheral walls of the rotor are made of flat sheets and if the edges of the floor and the ceiling follow these walls.
De préférence l'étendue angulaire totale des tronçons des dites parois périphériques situés en dehors desdits secteurs protégés constitue une fraction minoritaire du tour dudit rotor de manière à concentrer ladite usure extérieure dans des secteurs limités dans lesquels des remplacements et/ou rechargements peuvent être effectués économiquement sur ces parois.Preferably the total angular extent of the sections of said peripheral walls located outside said protected sectors constitutes a minority fraction of the turn of said rotor so as to concentrate said external wear in limited sectors in which replacements and / or recharges can be carried out economically. on these walls.
De préférence ledit retrait progressif se poursuit jusqu'à dépasser 10% dudit rayon maximal, et de préférence encore, sensiblement plus.Preferably said progressive withdrawal continues until exceeding 10% of said maximum radius, and more preferably, substantially more.
De préférence il est réalisé simplement par le fait que lesdites parois périphériques du rotor sont, au moins majoritairement, constituées par les dites aubes de projection, lesdits bords extérieurs desdits plancher et plafond suivant ces aubes en dehors desdites ouvertures de sortie.Preferably it is achieved simply by the fact that said peripheral walls of the rotor are, at least mainly, constituted by said projection vanes, said outer edges of said floor and ceiling along these vanes outside said outlet openings.
De préférence encore ledit rotor présente en plan la forme générale d'un polygone convexe possèdant une symétrie d'ordre N autour dudit axe, N étant le nombre desdites aubes des projections, ce polygone comportant, pour chacune de ces aubes, un petit côté s'étendant selon un tronçon avant de cette aube aved une extrémité avant constituée par ladite arête de projection, l'extrémité arrière de ce petit côté étant plus proche dudit axe que cette extrémité avant et se raccordant à un grand côté qui constitue un tronçon principal rectiligne de la même aube, au moins une fraction avant de ce tronçon principal se rapprochant encore dudit axe pour former avec ledit tronçon avant un dit secteur protégé.Preferably also said rotor has in plan the general shape of a convex polygon having symmetry of order N around said axis, N being the number of said projection blades, this polygon comprising, for each of these blades, a short side extending along a front section of this blade with a front end constituted by said projection edge, the end rear of this small side being closer to said axis than this front end and connecting to a large side which constitutes a straight main section of the same blade, at least a front fraction of this main section still approaching said axis to form with said section before a said protected area.
Une telle forme polygonale est en effet facilement réalisable avec des tôles planes découpées et soudées.Such a polygonal shape is in fact easily achievable with cut and welded flat sheets.
De préférence une fraction arrière dudit tronçon principal rectiligne prolonge vers l'arrière ladite fraction avant de ce tronçon en s'écartant progressivement dudit axe jusqu'au voisinage d'un bord avant de ladite ouverture de sortie de l'aube de projection suivante.Preferably a rear fraction of said straight main section extends rearwards said front fraction of this section while gradually moving away from said axis to the vicinity of a front edge of said outlet opening of the next projection vane.
De préférence cette fraction arrière est une fraction minoritaire et l'expérience montre qu'elle peut alors constituer un secteur protégé complémentaire.Preferably this rear fraction is a minority fraction and experience shows that it can then constitute a complementary protected sector.
Bien entendu les bords supérieur et inférieur de ladite ouverture de sortie de l'aube suivant peuvent ne pas être exactement dans l'alignement dudit tronçon principal de l'aube précédente.Of course the upper and lower edges of said outlet opening of the next blade may not be exactly in alignment with said main section of the previous blade.
Plus particulièrement, toujours de préférence, ledit rotor présente en plan la forme générale d'un triangle équilatéral à coins coupés, lesdites aubes de projection étant au nombre de trois, trois coins coupés de ce triangle étant constitués par lesdits tronçons avant desdites aubes de projection, les trois côtés de ce triangle étant constitués par lesdits tronçons principaux de ces aubes.More particularly, still preferably, said rotor has in plan the general shape of an equilateral triangle with cut corners, said projection vanes being three in number, three cut corners of this triangle being constituted by said front sections of said projection vanes , the three sides of this triangle being constituted by said main sections of these blades.
Il est cependant clair que le nombre d'aubes pourrait être de deux, quatre ou cinq au lieu de trois, ce qui correspondrait à une forme générale en parallélogramme allongé, ou en carré ou pentagone à coins coupés.It is however clear that the number of blades could be two, four or five instead of three, which would correspond to a general shape in elongated parallelogram, or in square or pentagon with cut corners.
De préférence chaque dite aube de projection comporte, outre lesdits tronçons avant et principal, un tronçon arrière revenant sensiblement radialement vers l'intérieur dudit rotor de projection pour raidir ce tronçon principal tout en retenant des pierres à l'extrémité arrière de ce tronçon.Preferably each said projection blade comprises, in addition to said front and main sections, a rear section returning substantially radially inward of said projection rotor to stiffen this main section while retaining stones at the rear end of this section.
Par ailleurs, de préférence encore, selon une disposition connue en elle-même par le document Mac Donald, le rotor comporte, circonférentiellement en avant de chacune desdites ouvertures de sortie, un élément de protection s'étendant suffisamment loin pour intercepter préalablement des fragments de pierres dangereux qui pourraient casser une pièce de haute dureté formant ladite arête de projection.Furthermore, more preferably still, according to an arrangement known in itself from the Mac Donald document, the rotor comprises, circumferentially in front of each of said outlet openings, a protective element extending far enough to intercept fragments of dangerous stones which could break a part of high hardness forming said projection edge.
Dans ce cas, de préférence, ledit élément de protection en avant de chacune desdites ouvertures de sortie est une plaque de protection formant une saillie sensiblement radiale sur la périphérie dudit rotor de projection, de manière que lesdits fragments de pierres dangereux soient interceptés sensiblement à angle droit par cette plaque de protection en lui donnant des chocs frontaux, cette plaque de protection étant constituée, au moins en face avant d'un matériau moins dur que ladite pièce de haute dureté.In this case, preferably, said protective element in front of each of said outlet openings is a protective plate forming a substantially radial projection on the periphery of said projection rotor, so that said fragments of dangerous stones are intercepted substantially at an angle straight by this protective plate giving it frontal impacts, this protective plate being made up, at least on the front face of a material which is less hard than said high hardness part.
De préférence cette plaque de protection s'étend suffisamment vers le bas et vers le haut pour protéger aussi les bords inférieur et supérieur de ladite ouverture de sortie.Preferably this protection plate extends sufficiently downwards and upwards to also protect the lower and upper edges of said outlet opening.
De préférence ladite plaque de protection forme, en plan, un angle obtus avec la partie de ladite paroi périphérique située circonférentiellement juste en avant d'elle de manière à défléchir les filets d'air extérieur qui circulent, par rapport audit rotor de projection, au contact de cette paroi pour éloigner de ladite ouverture de sortie des poussières de pierre suspendues dans ces filets d'air.Preferably said protective plate forms, in plan, an obtuse angle with the part of said peripheral wall situated circumferentially just in front of it so as to deflect the external air streams which circulate, with respect to said projection rotor, at contact of this wall to move away from said outlet opening stone dust suspended in these air streams.
De préférence enfin ladite plaque de protection se raccorde à l'extrémité arrière dudit tronçon principal de ladite aube de projection, ledit tronçon arrière de cette aube étant constitué par un prolongement de cette plaque de protection vers l'intérieur dudit rotor de projection entre lesdits plancher et plafond de manière à permettre le maintien de cette plaque de protection par l'intermédiaire de ce tronçon arrière.Preferably, finally, said protection plate is connected to the rear end of said main section of said projection vane, said rear section of this vane being constituted by an extension of this protection plate towards the interior of said projection rotor between said floors. and ceiling of so as to allow the maintenance of this protective plate by means of this rear section.
A l'aide des figures schématiques ci-jointes on va décrire plus particulièrement ci-après, à titre d'exemple non limitatif, divers mode de mise en oeuvre de la présente invention. Ces modes comportent aussi, sauf indication contraire, la mise en oeuvre des dispositions mentionnées ci-dessus comme étant de préférence adoptées. Lorsqu'un même élément est représenté sur plusieurs figures il y est désigné par le même signe de référence.
- - La figure 1 représente une vue latérale de l'ensemble d'un premier concasseur selon l'invention, en coupe axiale.
- - La figure 2 représente une vue latérale de l'ensemble d'un deuxième concasseur selon l'invention, en coupe axiale.
- - La figure 3 représente une vue en coupe horizontale du rotor à trois aubes de n'importe lequel de ces deux concasseurs, par exemple du premier.
- - La figure 4 représente une vue de dessus du tronçon avant d'une aube de projection de ce rotor dont le plafond est supposé enlevé.
- La figure 5 représente une vue de côté du même tronçon avant.
- La figure 6 est analogue à la figure 4 et représente une vue de dessus du tronçon avant l'une aube de projection du rotor de l'autre des deux dits concasseurs, par exemple du deuxième.
- La figure 7 représente une vue du rotor de la figure 4 en coupe par un plan axial.
- La figure 8 représente une vue en coupe horizontale d'un rotor à cinq aubes.
- - Figure 1 shows a side view of the assembly of a first crusher according to the invention, in axial section.
- - Figure 2 shows a side view of the assembly of a second crusher according to the invention, in axial section.
- - Figure 3 shows a horizontal sectional view of the rotor with three blades of any of these two crushers, for example the first.
- - Figure 4 shows a top view of the front section of a projection vane of this rotor whose ceiling is assumed to be removed.
- FIG. 5 represents a side view of the same front section.
- Figure 6 is similar to Figure 4 and shows a top view of the section before one of the rotor projection blade of the other of the two said crushers, for example the second.
- Figure 7 shows a view of the rotor of Figure 4 in section through an axial plane.
- FIG. 8 represents a view in horizontal section of a rotor with five blades.
Conformément à la figure 1 und premier concasseur à aubes de projection autoprotégées selon l'invention présente un axe vertical A et il comporte un rotor de projection 1. Ce dernier est monté sur un arbre vertical 2 muni de paliers protégés non visibles sur la figure. Cet arbre est entraîné en rotation rapide, par exemple à 1110 tours par minute, par un moteur 5 par l'intermédiaire de poulies 3A et 3B et de courroies 4.In accordance with FIG. 1 and the first self-protected projection vane crusher according to the invention has a vertical axis A and it includes a
Le rotor 1 comporte un plancher 8 et un plafond 9. Ce dernier est percé d'une ouverture circulaire centrale dans laquelle s'engage une cheminée verticale 6 canalisant les pierres à partir d'une trémie 7. Cette cheminée est munie d'une dispositif 15 permettant de corriger son niveau dans le rotor au fur et à mesure de son usure par les pierres qui constituent le matériau à concasser.The
Le plancher et le plafond sont reliés par des parois verticales qui seront décrites plus loin à l'aide de la figure 3.The floor and the ceiling are connected by vertical walls which will be described later using Figure 3.
Le stator du premier concasseur est constitué par une couronne 11 circulaire horizontale qui constitue le fond d'une caisse à pierres. Un cylindre vertical 12 constitue la paroi externe de ce stator et du concasseur. Il est blindé dans sa partie supérieure, au-dessus du niveau de la matière concassée 13. Celle-ci est constituée par des fragments des pierres qui ont été introduites dans la trémie 7. Un certain volume en est retenu dans la caisse à pierres. Le stator vient se fermer autour de la cheminée 6 par un couvercle horizontal blindé 14.The stator of the first crusher is constituted by a horizontal
Des raidisseurs radiaux verticaux 16 améliorent la tenue du stator et retiennent la matière 13 accumulée dans la caisse à pierres.Vertical
La matière concassée sort vers la partie basse du stator par l'intervalle annulaire 10 existant entre le rotor et la caisse à pierres. Elle est extraite à travers un fond conique 17 puis évacuée sur un moyen de transport tel qu'un convoyeur à bande, vers une trémie ou tout autre moyen de stockage.The crushed material exits towards the lower part of the stator through the
La figure 2 représente la même vue latérale en coupe axiale d'un deuxième concasseur qui peut ne diffèrer du premier que par son stator : la caisse à pierres 13 du premier est remplacée dans le second par des enclumes 19. L'envelope cylindrique du stator 12 est alors équipée d'une couronne porte-enclumes 18 permettant l'emboîtement et le déplacement vertical des enclumes 19 grâce à trois rampes 18A disposées à 120°.FIG. 2 represents the same side view in axial section of a second crusher which may differ from the first only by its stator: the
La figure 3 représente une vue en coupe horizontale d'un rotor polygonal dans lequel ledit nombre N vaut trois. Ce rotor a pratiquement la forme d'un triangle équilatéral à coins coupés. Le sens de sa rotation est représenté par une flèche F. Ce rotor de construction monobloc est constitué d'un plafond horizontal 9 non visible sur cette vue, d'un plancher 8 également horizontal, en tôles de forte épaisseur, et de plaques verticales 20, 21, 24, et 25 constituant trois aubes de projection. Chaque aube constitue à la fois une paroi périphérique du rotor et une paroi de guidage et d'accélération pour les pierres à concasser. Chacune de ces plaques verticales constitue un tronçon d'une de ces aubes.FIG. 3 represents a view in horizontal section of a polygonal rotor in which said number N is three. This rotor has practically the shape of an equilateral triangle with cut corners. The direction of its rotation is represented by an arrow F. This one-piece construction rotor consists of a
Chaque aube est majoritairement constituée d'un tronçon principal 20 comportant une fraction avant majoritaire 20A et une fraction arrière minoritaire 20B de part et d'autre d'un point situé à une distance minimale de l'axe A. L'extrémité avant de ce tronçon est soudée à un tronçon avant 21. Ce dernier forme un petit côté dudit polygone et son extrémité avant est formée par l'arête de projection 22 qui est par exemple située à 47 cm de l'axe A. Comme représenté sur les figures 4 et 5 cette dernière est formée sur une lame de projection 22A constituée par deux pièces d'acier amovibles superposées 22B et 22C comportant chacune deux barreaux verticaux de carbure de tungstène. L'un de ces barreaux 22D ou 22E constitue une partie de l'arête 22 et l'autre tel que 23 constitue une partie d'un barreau de protection qui augmente la longévité de cette pièce. Cette dernière est en effet soumise à abrasion non seulement par les pierres qui sortent de l'aube de projection en passant sur l'arête 22, mais aussi, dans une certaine mesure, par les fragments de pierres renvoyés par le stator. Les barreaux tels que 23 protégent partiellement la lame 22A et la plaque avant 21 de l'abrasion par ces fragments. Ils sont situés aux points de rayon maximal du rotor.Each blade is mainly made up of a
Les pièces 22B et 22C sont fixées sur la partie fixe de la plaque avant 21 par deux boulons 31.The
La figure 5 qui représente une vue de côté de la même plaque avant à partir de l'intérieur du rotor permet de voir ces deux pièces 22B et 22C superposés, interchangeables, et portant des barreaux de carbure de tungstène partiels de caractéristiques identiques tels que 22D et 22E. L'usure se produisant essentiellement vers le milieu de la plaque avant, cela permet d'interchanger les parties 22B et 22C pour augmenter la longévité.FIG. 5 which represents a side view of the same front plate from the inside of the rotor makes it possible to see these two
Conformément à la figure 6 les barreaux de protection tels que 23 peuvent être remplacés par un revêtement protecteur dur tel que 23A formé sur la surface exposée de chacune de deux pièces telles que 22F analogues aux pièces 22B et 22C. Ce revêtement est avantageusement constitué de petites particules arrondies ou billes de carbure de tungstème noyées dans un liant tel qu'un alliage cobalt nickel.In accordance with FIG. 6, the protective bars such as 23 can be replaced by a hard protective coating such as 23A formed on the exposed surface of each of two parts such as 22F similar to
Quoique de tels barreaux ou revêtements de protection aient été utilisés par les présents inventeurs, il semble qu'il soit souvent préférable de constituer les points de rayon maximal par de l'acier dur.Although such bars or protective coatings have been used by the present inventors, it seems that it is often preferable to constitute the points of maximum radius with hard steel.
Revenant à la figure 3, il aparaît que l'extrémité arrière du tronçon avant 21 est plus proche de l'axe du rotor que son extrémité avant.Returning to FIG. 3, it appears that the rear end of the
Le tronçon principal 20 de l'aube vient par son extrémité arrière limiter l'ouverture de sortie 21A de l'aube de projection suivante.The
Une plaque de protection 24 forme saillie en avant de cette ouverture de sortie. Sa face circonférentiellement avant est équipée d'une plaque d'usure amovible 24B qui porte des vis 24C qui permettent de la fixer à l'aide d'écrous 24D sur la face circonférentiellement arrière de la plaque 24. Cette plaque d'usure est constituée d'un acier allié dur ou d'une fonte au chrome résistant bien à l'abrasion, alors que l'ensemble du rotor est constitué d'un acier moins dur et plus facile à usiner et à souder. Ledit acier allié dur est choisi à la fois suffisamment ductile pour bien résister aux chocs frontaux les plus violents, et suffisamment dur pour résister longtemps à l'érosion par raclage. La plaque 24 ainsi équipée dévie les fragments qui ricochent depuis le stator ainsi que les filets d'air chargés de poussière et de sable créés par la rotation rapide du rotor. Ce faisant elle contribue à la protection de la lame de projection 22A et elle protége les bords du plancher 8 et du plafond 9 autour de l'ouverture de sortie.A
L'extrémité radialement extérieure de la plaque de protection peut être placée à un rayon, c'est-à-dire à une distance de l'axe A, légèrement supérieur à celui de la lame de projection 22A comme représenté à la figure 3. Elle peut cependant aussi être placée à un rayon égal ou légèrement inférieur (voir fig.8) tout en protégeant utilement cette lame, peut être avec l'aide des pierres et du courant d'air sortant par l'ouverture de sortie 21A.The radially outer end of the protective plate can be placed at a radius, that is to say at a distance from the axis A, slightly greater than that of the
Chaque plaque de protection 24 est placée pratiquement en position radiale. Elle se raccorde à une fraction arrière minoritaire du tronçon principal 20 de l'aube de projection précédente avec laquelle elle forme un angle obtus favorisant la déviation des filets d'air extérieurs. Cette plaque de protection se prolonge par ailleurs à l'intérieur du rotor. Sa partie intérieure 24A constitue à la fois un tronçon arrière de l'aube de projection, avec un rôle de retenue vers l'arrière de la couche de protection, et un raidisseur arrière pour le tronçon principal 20 de cette aube.Each
Chaque aube de projection est équipée d'au moins un raidisseur intermédiaire 25 formant saillie vers l'intérieur pour renforcer le maintien. Ladite zone de réception des pierres sur cette aube s'étend entre ces deux raidisseurs 24A et 25.Each projection vane is equipped with at least one
Des plaques d'usure 26 protègent le plancher 8 dans les zones où celui-ci n'est pas naturellement protégé par la couche de matière maintenue dans le rotor. Ces plaques d'usure sont maintenues naturellement en place par la force centrifuge, sans boulonnage, grâce à des taquets 27, 28, 29 fixés à cet effet au plancher.Wear
Au centre du rotor, un trou 38 percé dans le plancher 8 reçoit un disque massif 30 dénommé distributeur. Ce dernier présente un diamètre de l'ordre du tiers de celui du rotor c'est-à-dire de celui du cercle circonscrit au rotor. Il fait saillie sur le plancher 8 et a deux fonctions : distribuer le matériau reçu vers les aubes de projection et fixer le rotor 1 sur l'axe de rotation 2, comme il va être précisé à l'aide de la figure 7.In the center of the rotor, a
Le rotor 1 est porté et entraîné par l'intermédiaire de son plancher 8. Ce dernier est lui même porté et entraîné non pas directement par l'arbre 2 mais par un plateau porteur 34 qui est monté par des moyens mécaniques classiques sur l'extrémité supérieure de l'arbre 2 dont le diamètre est beaucoup plus petit. Ce plateau porteur est séparable du rotor. Il présente un diamètre légèrement supérieur à la moitié de celui du plancher 8 et son épaisseur est suffisante pour lui donner toute la rigidité souhaitable. Sa présence permet d'assurer la rigidité du rotor tout en ne donnant qu'une épaisseur modérée au plancher.The
Les déplacements de translation horizontaux du rotor sont empêchés par le fait que le plancher 8 comporte en face inférieure, autour de son trou central 38, une protubérance annulaire centrale 40 qui, à l'arrêt, est insérée avec un très faible jeu dans un logement central 44 du plateau porteur 34 et qui, en service, s'appuie contre l'éppaulement de retenue 42 qui constitue le bord de ce logement.The horizontal translational displacements of the rotor are prevented by the fact that the
Les déplacements verticaux de séparation sont empêchés notamment par l'intermédiaire du distributeur 30. Ce dernier est fixé à l'arbre par une vis axiale unique 33 disposée dans un puits axial 32 de ce distributeur. Ce puits est rempli en service par des pierres qui protègent la tête de cette vis contre l'usure. Un petit intervalle est ménagé entre la surface périphérique du distributeur et le bord du trou percé dans le plancher 8. Ce dernier est maintenu par une rondelle intermédiaire 36 bloquée sous le distributeur 30. Pour cela la surface périphérique de cette rondelle est légèrement conique, en cône mâle à pointe en bas, et vient en appui précis sur la surface intérieure de la protubérance annulaire 40, qui est usinée selon un cône femelle correspondant. Dans ces conditions le risque d'usure de la rondelle intermédiaire 36 est très faible car sa position lui assure une protection par le distributeur 30 et le plancher 8.Vertical separation movements are prevented in particular by means of the
Quant aux déplacements de rotation du plancher 8 par rapport au plateau porteur 34, ils sont empêchés par une clavette horizontale radiale 35 qui est fixée sur le plateau porteur par deux goupilles verticales 37. Des logements sont creusés pour cette clavette dans les faces inférieures de la rondelle 36 et du distributeur 30 pour les bloquer.As for the rotational movements of the
Le plancher 8 et le plafond 9 sont respectivement protégés par des plaques d'usure amovibles 26 et 26A.The
La figure 8 est une vue en coupe horizontale d'un rotor à cinq aubes. On y retrouve des éléments analogues à tous les éléments constitutifs essentiels du rotor précédent à trois aubes. Ces éléments analogues sont désignés par les mêmes numéros de référence augmentés de 100.Figure 8 is a horizontal sectional view of a rotor with five blades. There are elements similar to all the essential components of the previous rotor with three blades. These analogous elements are designated by the same reference numbers increased by 100.
Claims (10)
- un rotor de projection (1) rigide présentant un axe vertical (A) et muni de moyens (2, 3, 4, 5) pour le guider et l'entraîner en rotation rapide autour de cet axe, le sens de sa rotation (F) et le sens opposé constituant des sens circonférentiellement avant et arrière, respectivement, ce rotor comportant lui-même :
- un plancher (8) limité par un bord extérieur,
- un plafond (9) limité par un bord extérieur, disposé au-dessus de ce plancher et percé d'une ouverture d'alimentation centrale (6A) pour faire descendre en continu lesdites pierres dans ledit rotor,
- et des parois reliant ce plancher à ce plafond, certaines de ces parois formant des aubes de projection angulairement successives, chacune de ces aubes recevant une fraction desdites pierres au voisinage dudit axe et guidant ces pierres jusqu'à une arête de projection qui constitue une extrémité longitudinalement avant de cette aube à la périphérie dudit rotor, de manière que ces pierres soient projetées tangentiellement à l'extérieur dudit rotor par cette arête, cette aube présentant en plan une forme creuse à concavité dirigée circonférentiellement vers l'avant pour que des pierres soient retenues à l'arrière de ladite arête de projection et constituent une couche de protection protégeant le reste de cette aube de l'usure,
- ladite arête de projection (22) étant formée par au moins une lame de projection (22A) de haute dureté et/ou remplaçable pour ralentir son usure et/ou permettre son remplacement facile après usure,
- ces parois formant aussi une succession circonférentielle de parois périphériques qui séparent ledit rotor de l'espace extérieur tout en laissant entre elles une ouverture de sortie (21A) pour lesdites pierres circonférentiellement à l'avant de chaque dite arête de projection, ces parois périphériques constituant avec lesdits bords extérieurs du plancher et du plafond une surface périphérique du rotor,
- ledit concasseur comportant encore une structure externe de réception (11, 12) qui entoure ledit rotor de projection en laissant un intervalle annulaire (10) autour de celui-ci et qui présente des surfaces de choc dures (13, 19) pour recevoir les chocs directs des pierres projetées par ce rotor et pour casser ces pierres en formant des fragments de pierres et des poussières, certains de ces fragments revenant vers ce rotor et lui donnant des chocs en retour, certaines de ces poussières étant entraînées par des courants d'air engendrés par la rotation dudit rotor,
- et des moyens de sortie (10, 17) pour lesdits fragments des pierres,
- ladite surface périphérique du rotor étant formée en retrait radial par rapport auxdites lames de projection dans des secteurs en retrait qui se succèdent circonférentiellement en s'étendant chacun à l'arrière d'une dite lame de projection de manière à être protégée dans une partie de ce secteur par cette lame contre lesdits chocs en retour,
- ce concasseur étant caractérisé par le fait que dans chaque dit secteur en retrait s'étendant circonférentiellement vers l'arrière à partir d'un point de rayon maximal (23) d'une dite lame de projection (22A), ladite surface périphérique (21, 20) s'écarte progressivement radialement vers l'intérieur d'un cercle centré sur ledit axe (A) et passant par ledit point de rayon maximal, de manière que la totalité de ce secteur en retrait constitue un secteur protégé dans lequel cette surface est protégée contre l'usure extérieure due auxdits chocs en retour et auxdites poussières entraînées par lesdits courants d'air.1 / Rotary crusher with self-protected projection vanes, this crusher being intended to break stones and comprising
- a rigid projection rotor (1) having a vertical axis (A) and provided with means (2, 3, 4, 5) to guide it and cause it to rotate rapidly around this axis, the direction of its rotation ( F) and the opposite direction constituting circumferentially front and rear directions, respectively, this rotor itself comprising:
- a floor (8) limited by an outer edge,
- a ceiling (9) limited by an outer edge, disposed above this floor and pierced with a central supply opening (6A) for continuously bringing said stones down into said rotor,
- And walls connecting this floor to this ceiling, some of these walls forming angularly successive projection vanes, each of these vanes receiving a fraction of said stones in the vicinity of said axis and guiding these stones to a projection edge which constitutes a longitudinally front end of this blade at the periphery of said rotor, so that these stones are projected tangentially to the outside of said rotor by this edge, this blade having in plan a hollow shape with a concavity directed circumferentially forward so that stones are retained at the rear of said projection edge and constitute a protective layer protecting the rest of this dawn from wear,
said projection edge (22) being formed by at least one projection blade (22A) of high hardness and / or replaceable to slow down its wear and / or allow its easy replacement after wear,
- These walls also forming a circumferential succession of peripheral walls which separate said rotor from the outside space while leaving between them an outlet opening (21A) for said stones circumferentially at the front of each said projection edge, these peripheral walls constituting with said outer edges of the floor and the ceiling a peripheral surface of the rotor,
- said crusher further comprising an external receiving structure (11, 12) which surrounds said projection rotor leaving an annular gap (10) around it and which has hard impact surfaces (13, 19) for receiving the direct impact of the stones thrown by this rotor and to break these stones by forming fragments of stones and dust, some of these fragments returning towards this rotor and giving it shocks in return, some of this dust being entrained by currents of air generated by the rotation of said rotor,
- and outlet means (10, 17) for said fragments of stones,
- Said peripheral surface of the rotor being formed in radial recess relative to said projection blades in recessed sectors which follow one another circumferentially, each extending at the rear of a said projection blade so as to be protected in part of this sector by this blade against said return shocks,
- this crusher being characterized in that in each said recessed sector extending circumferentially towards the rear from a point of maximum radius (23) of a said projection blade (22A), said peripheral surface ( 21, 20) gradually deviates radially inwards from a circle centered on said axis (A) and passing through said point of maximum radius, so that the whole of this recessed sector constitutes a protected sector in which this surface is protected against external wear due to said back impact and to said dust entrained by said air currents.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88101235T ATE67433T1 (en) | 1987-01-30 | 1988-01-28 | ROTARY CRUSHER WITH PROTECTED WHEEL BLADES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8701159A FR2610217B1 (en) | 1987-01-30 | 1987-01-30 | ROTARY CRUSHER WITH SELF-PROTECTED SPRAY BLADES |
FR8701159 | 1987-01-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0276848A2 true EP0276848A2 (en) | 1988-08-03 |
EP0276848A3 EP0276848A3 (en) | 1989-03-01 |
EP0276848B1 EP0276848B1 (en) | 1991-09-18 |
Family
ID=9347447
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88101235A Expired - Lifetime EP0276848B1 (en) | 1987-01-30 | 1988-01-28 | Rotary breaker with protected projection blades |
EP88101236A Expired - Lifetime EP0276849B1 (en) | 1987-01-30 | 1988-01-28 | Rotary breaker with protected projecting blades |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88101236A Expired - Lifetime EP0276849B1 (en) | 1987-01-30 | 1988-01-28 | Rotary breaker with protected projecting blades |
Country Status (10)
Country | Link |
---|---|
EP (2) | EP0276848B1 (en) |
AT (2) | ATE65944T1 (en) |
DE (2) | DE3864031D1 (en) |
DK (2) | DK166906B1 (en) |
ES (2) | ES2026209T3 (en) |
FR (1) | FR2610217B1 (en) |
GR (2) | GR3003051T3 (en) |
IE (2) | IE60187B1 (en) |
NO (2) | NO172676C (en) |
ZA (2) | ZA88652B (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4923131A (en) * | 1988-06-06 | 1990-05-08 | Rossouw Pieter J | Rotary impact crusher rotor |
AU620600B2 (en) * | 1988-12-05 | 1992-02-20 | Kotobuki Engineering & Manufacturing Co., Ltd. | Apparatus and method of breaking pieces of solid mineral material in fragments, and method of sorting fragments of solid mineral material according to size |
GB2214107B (en) * | 1987-12-24 | 1992-08-19 | John Rodriguez | Tip holder foe mineral breaker. |
FR2676661A1 (en) * | 1991-05-23 | 1992-11-27 | Drac Isere Concassage Sa | Vertical axis mill (crusher) |
WO1995011086A1 (en) * | 1993-10-22 | 1995-04-27 | Barmac Associates Limited | Mineral breakers |
DE19631734A1 (en) * | 1996-08-06 | 1998-02-19 | Steckert Martin | Impact crushing machine |
WO1998022221A1 (en) | 1996-11-20 | 1998-05-28 | Christian Pfeiffer Maschinenfabrik Gmbh | Impact crusher |
US6405953B1 (en) | 1999-07-30 | 2002-06-18 | Impact Service Corporation | Impeller shoe for an impact crusher |
KR100656731B1 (en) | 2004-12-22 | 2006-12-12 | (주)거산기계 | Circulation aggregate sand mill |
US7416146B2 (en) * | 2001-08-02 | 2008-08-26 | Kennametal Inc. | Wear resistant center feed impact impeller |
CN102641768A (en) * | 2012-04-01 | 2012-08-22 | 衢州美安普矿山机械有限公司 | Rotor and vertical shaft type impact crusher provided with rotor |
CN110508375A (en) * | 2019-08-15 | 2019-11-29 | 晏斯华 | A kind of breaking method, spiral-flow type Clash disintegrating machine structure and multipole grinding device |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3843338A1 (en) * | 1988-12-22 | 1990-06-28 | Krupp Polysius Ag | SAFE |
DE3844181A1 (en) * | 1988-12-29 | 1990-07-05 | Orenstein & Koppel Ag | DEVICE FOR CRUSHING AND CLASSIFYING SHEET-SHAPED GOODS |
US5680994A (en) * | 1989-07-10 | 1997-10-28 | Wastenot International Ltd. | Mill for grinding garbage or the like |
DE4215911C2 (en) * | 1992-05-14 | 1996-01-04 | Wifag Maschf | Jaw cylinder |
US7427042B2 (en) * | 2005-11-16 | 2008-09-23 | Damian Rodriguez | Wear tip for rotary mineral breaker |
WO2022008054A1 (en) | 2020-07-09 | 2022-01-13 | Sandvik Srp Ab | A wear plate assembly |
CN113649159A (en) * | 2021-07-02 | 2021-11-16 | 南昌矿山机械有限公司 | Vertical shaft type impact crusher with central channel cone and feeding and distributing method |
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US3168991A (en) * | 1963-11-20 | 1965-02-09 | Pettibone Muiliken Corp | Vertical shaft rock crusher with abbreviated table |
US3174697A (en) * | 1962-07-30 | 1965-03-23 | Adams Engineering | Impeller |
FR2201928A1 (en) * | 1972-10-05 | 1974-05-03 | Mac Donald George | |
EP0101277A2 (en) * | 1982-08-07 | 1984-02-22 | Barmac Associates Limited | Rotary mineral breaker |
DE8630185U1 (en) * | 1986-10-30 | 1987-01-08 | SBM Wageneder GmbH, Laakirchen, Oberösterreich | Impact mill for crushing rock or similar. |
DE3610974C2 (en) * | 1986-04-02 | 1988-01-07 | Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen, De |
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US2985391A (en) * | 1959-12-24 | 1961-05-23 | Benjamin J Parmele | Rotary disc pulverizer |
AT381246B (en) * | 1984-12-04 | 1986-09-10 | Wageneder Sbm Gmbh | IMPACT MILL FOR THE CRUSHING OF STONE OR THE LIKE. |
-
1987
- 1987-01-30 FR FR8701159A patent/FR2610217B1/en not_active Expired - Fee Related
-
1988
- 1988-01-28 EP EP88101235A patent/EP0276848B1/en not_active Expired - Lifetime
- 1988-01-28 NO NO880359A patent/NO172676C/en unknown
- 1988-01-28 DE DE8888101236T patent/DE3864031D1/en not_active Expired - Fee Related
- 1988-01-28 AT AT88101236T patent/ATE65944T1/en not_active IP Right Cessation
- 1988-01-28 EP EP88101236A patent/EP0276849B1/en not_active Expired - Lifetime
- 1988-01-28 AT AT88101235T patent/ATE67433T1/en not_active IP Right Cessation
- 1988-01-28 DE DE8888101235T patent/DE3864840D1/en not_active Expired - Fee Related
- 1988-01-28 ES ES198888101235T patent/ES2026209T3/en not_active Expired - Lifetime
- 1988-01-28 NO NO880360A patent/NO165869C/en unknown
- 1988-01-28 ES ES88101236T patent/ES2023957B3/en not_active Expired - Lifetime
- 1988-01-29 ZA ZA88652A patent/ZA88652B/en unknown
- 1988-01-29 IE IE25288A patent/IE60187B1/en not_active IP Right Cessation
- 1988-01-29 ZA ZA88651A patent/ZA88651B/en unknown
- 1988-01-29 IE IE25188A patent/IE60186B1/en not_active IP Right Cessation
- 1988-01-29 DK DK045988A patent/DK166906B1/en not_active IP Right Cessation
- 1988-01-29 DK DK046088A patent/DK46088A/en not_active Application Discontinuation
-
1991
- 1991-10-31 GR GR91401644T patent/GR3003051T3/en unknown
- 1991-12-04 GR GR91401897T patent/GR3003269T3/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3174697A (en) * | 1962-07-30 | 1965-03-23 | Adams Engineering | Impeller |
US3168991A (en) * | 1963-11-20 | 1965-02-09 | Pettibone Muiliken Corp | Vertical shaft rock crusher with abbreviated table |
FR2201928A1 (en) * | 1972-10-05 | 1974-05-03 | Mac Donald George | |
EP0101277A2 (en) * | 1982-08-07 | 1984-02-22 | Barmac Associates Limited | Rotary mineral breaker |
DE3610974C2 (en) * | 1986-04-02 | 1988-01-07 | Bhs-Bayerische Berg-, Huetten- Und Salzwerke Ag, 8000 Muenchen, De | |
DE8630185U1 (en) * | 1986-10-30 | 1987-01-08 | SBM Wageneder GmbH, Laakirchen, Oberösterreich | Impact mill for crushing rock or similar. |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2214107B (en) * | 1987-12-24 | 1992-08-19 | John Rodriguez | Tip holder foe mineral breaker. |
US4923131A (en) * | 1988-06-06 | 1990-05-08 | Rossouw Pieter J | Rotary impact crusher rotor |
AU620600B2 (en) * | 1988-12-05 | 1992-02-20 | Kotobuki Engineering & Manufacturing Co., Ltd. | Apparatus and method of breaking pieces of solid mineral material in fragments, and method of sorting fragments of solid mineral material according to size |
FR2676661A1 (en) * | 1991-05-23 | 1992-11-27 | Drac Isere Concassage Sa | Vertical axis mill (crusher) |
WO1995011086A1 (en) * | 1993-10-22 | 1995-04-27 | Barmac Associates Limited | Mineral breakers |
DE19631734C2 (en) * | 1996-08-06 | 1998-07-02 | Steckert Martin | Impact crusher |
DE19631734A1 (en) * | 1996-08-06 | 1998-02-19 | Steckert Martin | Impact crushing machine |
WO1998022221A1 (en) | 1996-11-20 | 1998-05-28 | Christian Pfeiffer Maschinenfabrik Gmbh | Impact crusher |
US6405953B1 (en) | 1999-07-30 | 2002-06-18 | Impact Service Corporation | Impeller shoe for an impact crusher |
US7416146B2 (en) * | 2001-08-02 | 2008-08-26 | Kennametal Inc. | Wear resistant center feed impact impeller |
KR100656731B1 (en) | 2004-12-22 | 2006-12-12 | (주)거산기계 | Circulation aggregate sand mill |
CN102641768A (en) * | 2012-04-01 | 2012-08-22 | 衢州美安普矿山机械有限公司 | Rotor and vertical shaft type impact crusher provided with rotor |
CN110508375A (en) * | 2019-08-15 | 2019-11-29 | 晏斯华 | A kind of breaking method, spiral-flow type Clash disintegrating machine structure and multipole grinding device |
Also Published As
Publication number | Publication date |
---|---|
ZA88652B (en) | 1988-10-26 |
NO165869B (en) | 1991-01-14 |
DK46088A (en) | 1988-07-31 |
NO165869C (en) | 1991-04-24 |
IE60187B1 (en) | 1994-06-15 |
ES2026209T3 (en) | 1992-04-16 |
NO172676B (en) | 1993-05-18 |
DE3864840D1 (en) | 1991-10-24 |
EP0276848A3 (en) | 1989-03-01 |
ES2023957B3 (en) | 1992-02-16 |
GR3003051T3 (en) | 1993-02-17 |
DK166906B1 (en) | 1993-08-02 |
EP0276849B1 (en) | 1991-08-07 |
DK45988A (en) | 1988-07-31 |
NO880360D0 (en) | 1988-01-28 |
NO880359L (en) | 1988-08-01 |
EP0276849A2 (en) | 1988-08-03 |
EP0276848B1 (en) | 1991-09-18 |
ATE67433T1 (en) | 1991-10-15 |
GR3003269T3 (en) | 1993-02-17 |
ZA88651B (en) | 1988-10-26 |
DK45988D0 (en) | 1988-01-29 |
FR2610217A1 (en) | 1988-08-05 |
IE880252L (en) | 1988-07-30 |
NO880360L (en) | 1988-08-01 |
FR2610217B1 (en) | 1991-08-16 |
EP0276849A3 (en) | 1989-03-01 |
ATE65944T1 (en) | 1991-08-15 |
IE60186B1 (en) | 1994-06-15 |
DE3864031D1 (en) | 1991-09-12 |
DK46088D0 (en) | 1988-01-29 |
NO172676C (en) | 1993-08-25 |
NO880359D0 (en) | 1988-01-28 |
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