JP2017113738A - Gyratory crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gyratory crusher capable of preventing wear of a mantle core itself, even when a mantle or a mantle cave is unevenly worn.SOLUTION: A gyratory crusher includes: a cone cave provided inside a frame; a mantle core 12 arranged rotatably inside the cone cave, and having a truncated conical face-shaped outer peripheral surface; and a mantle 13 mounted on the outer peripheral surface of the mantle core 12, and having a truncated conical face-shaped outer peripheral surface. An annular member 52 is provided detachably on the outer peripheral surface of the mantle core 12, and the mantle 13 is connected to the outer peripheral surface of the annular member 52.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotary crusher such as a gyratory crusher or a cone crusher provided with a mantle that has a mantle attached to the outer surface thereof.

  Conventionally, as a crusher for crushing a large raw stone (rock), a rotary crusher such as a gyratory crusher or a cone crusher has been used (for example, Patent Documents 1 and 2).

  An outline and a crushing principle of a conventional crushing crusher will be described with reference to FIG. 1 using a cone crusher as an example.

  The conventional rotatory crusher shown in FIG. 1 has a central axis of the crusher at the center of the inner space formed by the upper frame 1 having a truncated inverted conical tube shape and the lower frame 2 connected thereto. A main shaft 5 is provided so as to be inclined with respect to the central axis.

  A lower portion of the main shaft 5 is rotatably inserted into a sleeve 4 having an eccentric shaft hole 3, and a lower end of the main shaft 5 is supported by a lower bearing 6 such as a thrust bearing. The lower bearing 6 is further supported by a piston 8 of a main shaft elevating hydraulic cylinder 7 that is connected to the lower end of the boss 2 a of the lower frame 2.

  Further, the upper end of the main shaft 5 is rotatably supported by an upper bearing 9 such as a sliding bearing, and the upper bearing 9 is supported by a spider 11 connected to an annular rim 10 attached to the upper end of the upper frame 1. ing.

  A mantle door 12 whose outer peripheral surface forms a frustoconical surface is firmly attached to the outer surface of the main shaft 5 by shrink fitting. A mantle 13 made of a wear-resistant material (for example, high manganese cast steel) and having an outer peripheral surface forming a frustoconical surface is attached to the outer surface of the mantle door 12.

  Further, the inner surface of the upper frame 1 is provided with a cone cave 14 made of a wear-resistant material (for example, high manganese cast steel). A crushing chamber 16 is formed by a space formed by the cone cave 14 and the mantle 13 and having a wedge-shaped vertical cross section.

  The central axis of the main shaft 5 and the central axis of the upper frame 1 intersect in the upper space of the crusher, and the main shaft 5 is an upper frame on a plane including the central axis of the main shaft 5 and the central axis of the upper frame 1. 1 with an inclination. When the main shaft 5 is rotated via a power transmission mechanism such as the pulley 22, the horizontal shaft 20, and the bevel gear 19 by an electric motor (not shown) provided below the sleeve 4 due to the inclination between the central axes of the two, the main shaft 5 is An eccentric swiveling motion, that is, a so-called precession motion is performed with respect to the upper frame 1, and the distance between the mantle 13 and the cone cave 14 periodically changes in a horizontal cross section at an arbitrary position on the central axis of the sleeve 4. Note that the change cycle of the distance is the same as the rotation cycle of the main shaft.

  A rock to be crushed (hereinafter referred to as “object to be crushed”) is input from above the crusher and falls into the crushing chamber 16. In the crushing chamber 16, the interval between the cone cave 14 and the mantle 13 becomes narrower downward, and the interval changes periodically as the main shaft 5 rotates. As a result, the object to be crushed progressed while being repeatedly dropped and compressed, and the lower part of the corn cave 14 was crushed to be smaller than the narrowest interval between the corn cave 14 and the mantle 13. It is collected from below as a crushed product.

  Here, a gap is provided between the outer surface of the mantle door 12 and the inner surface of the mantle 13 in order to relieve the reaction force from the material to be crushed by the mantle 13 by crushing the material to be crushed and transmit it to the mantle door 12. In the gap, for example, an epoxy resin layer is provided as a buffer material.

  Further, in order to effectively generate a pressing force for crushing, a metal touch portion is provided in which the outer surface of the mantle door 12 and the inner surface of the mantle 13 are in direct contact.

JP-A-8-281131 Japanese Patent Laid-Open No. 9-52056

  In the above-described rotary crusher, the wear of the crushing chamber 16 increases with the passage of operating time, and increases at the lower portion of the crushing chamber 16 where the load is large.

  As described above, in particular, when the wear of the mantle 13 or the like is increased in the lower region of the crushing chamber 16, the thickness of the mantle 13 is reduced, the deformation with respect to the acting load is increased, and the contact between the mantle 13 and the mantle door 12 is increased. The surface of the mantle door 12 may be worn at the surface.

  Since the mantle 13 directly exerts pressure on the rock, it is assumed that the mantle 13 will be replaced in a relatively short time due to wear, whereas the mantle door 12 is manufactured as a solid unit with the main shaft 5 and compared. Assuming long-term operation, the replacement of the mantle door 12 is generally carried out by a factory or the like.

  For this reason, if the mantle door 12 is also worn out and it is necessary to replace the mantle door 12 or the like, if it is sudden, it will lead to the suspension of the rock crushing equipment over a long period of time, and the loss due to the suspension of operation is large.

  Even if the wear is known in advance and the parts are prepared, the mantle door 13 is manufactured integrally with the main shaft 5 and is a major component of the rotary crusher and is expensive. Having spare parts in preparation for wear of the core 12 is a heavy burden for the operator of the rock crushing facility.

  As described above, when the mantle is damaged due to uneven wear of the mantle or the like, there is a problem of a large loss due to a long-term shutdown of the crusher and an increase in burden due to possession of spare parts.

  The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a rotary crusher that does not require replacement of the mantle door itself even when the mantle door is worn. And

  In order to solve the above-mentioned problem, a rotary crusher according to a first aspect of the present invention is provided with a cone cave provided inside a frame, and is rotatably arranged inside the cone cave, and has a truncated conical surface shape. A mantle having an outer peripheral surface, and a mantle having a frustoconical outer peripheral surface mounted on the outer peripheral surface of the mantle door, and an annular member is detachably provided on the outer peripheral surface of the mantle door The mantle is connected to the outer peripheral surface of the annular member.

  According to a second aspect of the present invention, in the first aspect, the annular member is connected to a lower portion of the mantle door, and above the annular member, an outer peripheral surface of the mantle door and an inner peripheral surface of the mantle A buffer member is provided in the space between the two.

  According to a third aspect of the present invention, in the first or second aspect, the inner peripheral surface of the annular member and the outer peripheral surface of the mantle door are connected by shrink fitting.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, at least one place in a circumferential direction on a contact surface between the inner peripheral surface of the annular member and the outer peripheral surface of the Manteller, A through hole or a recess is formed in the annular member and the mantle door, and a fixing member for preventing the rotation of the annular member with respect to the mantle door is inserted into the through hole or the recess portion. .

  According to the present invention, it is possible to provide a rotary crusher that does not require the replacement of the mantle door itself even when the mantle door is worn.

The figure which shows the structure of the conventional cone crusher typically. The longitudinal cross-sectional view which shows typically the principal part of the rotary crusher by one Embodiment of this invention. The disassembled perspective view for demonstrating the connection structure of the mantle and mantle door of the rotary crusher shown in FIG. The longitudinal cross-sectional view which shows typically the principal part of the rotary crusher by other embodiment of this invention. The disassembled perspective view for demonstrating the connection structure of the mantle and mantle door of the rotation type crusher shown in FIG.

  Hereinafter, a rotary crusher according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 2 and FIG. 3, the truncated conical tube-shaped mantle door 12 is attached to the main shaft 5 by fitting its inner peripheral surface and the outer peripheral surface of the main shaft 5 by shrink fitting.

  In the present embodiment, an annular member 52 having a truncated conical tube shape is provided on the outer peripheral surface of the lower part of the mantle door 12. The annular member 52 is attached by fitting its inner peripheral surface and the outer peripheral surface of the mantle door 12 by shrink fitting.

  In order to prevent rotation, the lower end portion of the annular member 52 may be supported by a pressing member 59 attached to the bottom surface of the mantle door 12. The pressing member 59 may be configured to support the entire circumferential direction of the annular member 52, or may be configured to support a part of the circumferential direction of the annular member 52.

  Further, a frustoconical mantle 13 is fitted on the outer peripheral surface of the annular member 52 by taper fitting. The mantle 13 is also connected to the mantle door 12 by a nut 56 at the top.

  In general, in the rotary crusher, as described above, the mantle 13 has the largest load in the lower part thereof, so that the mantle 13 is in metal contact with the mantle door 12 via the annular member 52 in the lower part. .

  A space sandwiched between the outer peripheral surface of the mantle door 12 and the inner peripheral surface of the mantle 13, and the upper portion of the annular member 52 is filled with a buffer material such as an epoxy resin, and acts on the mantle 13. The load is relaxed and transmitted to the mantle door 12.

  Since the mantle 13 is to be crushed by directly contacting the rocks to be crushed, as described above, the mantle 13 is manufactured from a wear-resistant material such as high manganese cast steel and is worn by crushing. Exchanged by On the other hand, the mantle door 12 is also made of an alloy steel corresponding to manganese steel, and is a product with almost no wear, so it is used for a long time. For this reason, when the mantle 13 is replaced due to wear or the like, the spindle assembly including the mantle door 12 is reused.

  As a result of the progress of wear on the outer peripheral surface of the mantle 13 and the reduction in the plate thickness, the annular member 52 is deformed into an elliptical shape by a load on the mantle 13 or the like, so that the annular member 52 is relative to the mantle door 12. There is a possibility that external force in the direction of rotation will be applied.

  Therefore, in the present embodiment, in order to prevent the annular member 52 from rotating with respect to the mantle door 12, the pin 53 for preventing rotation is inserted through the pin insertion hole 57 penetrating from the outer surface of the annular member 52. It is driven into the pin insertion recess 58. The cross-sectional shape of the pin 53 is substantially circular, rectangular, or other polygon. A shear stress acts mainly on the pin 53 as the mantle 13 for crushing rotates. Since it is desirable to increase the cross-sectional area in order to reduce the shear stress, the cross-section of the pin 53 is preferably a polygonal cross-section such as a rectangle.

  In order to enhance the effect of rotation prevention, it is preferable to provide a plurality of fixing portions by the pins 53 at equal intervals in the circumferential direction. However, if the number of fixing parts increases, it becomes difficult to ensure the accuracy of alignment and the like. Therefore, the number of fixing parts by the pins 53 is preferably about 2 to 3, for example.

  The mantle door 12, the annular member 52, the mantle 13 and the like are configured as shown in FIG. In FIG. 3, the components other than the mantle door 12, the annular member 52, the mantle 13 and the like are not shown.

  Since the annular member 52 has a truncated conical tube shape that extends downward, the annular member 52 is attached to the mantle door 12 from above. The mantle door 12 also has a truncated conical tube shape, and the inner peripheral surface of the annular member 52 and the outer peripheral surface of the mantle door 12 which are fitting portions of both are substantially the same shape. For this reason, the annular member 52 can be mounted and supported on the lower outer peripheral surface of the mantle door 12.

  When the annular member 52 is mounted on the mantle door 12, the pin insertion hole 57 of the annular member 52 and the pin insertion concave portion 58 of the mantle door 12 are aligned, and then the pin 53 is connected to the pin insertion hole 57 and the pin insertion concave portion. 58 is inserted. Thereafter, the mantle 13 is fitted into the mantle door 12 from above.

  As described above, in this embodiment, the assembly of the annular member 52 and the mantle 13 to the mantle 12 can all be performed from above the mantle door 12.

  Next, a method for removing the annular member 52 from the mantle door 12 in the rotary crusher according to the present embodiment will be described.

  Usually, shrink fitting is performed, for example, in which the annular member 52 is fitted in a state heated by a heater or the like, and is tightly connected by using heat shrinkage when returning to normal temperature. Therefore, when removing the annular member 52 from the mantle door 12, conversely, the annular member 52 is expanded by heating with a heater or the like to release the close contact state, and is removed from the mantle door 12.

  As another method, for example, the annular member 53 is removed from the mantle door 12 by cutting with a cutter or the like. Since the annular member 52 is tensioned in the circumferential direction by shrink fitting, the tension is released by cutting and can be easily removed. In particular, the annular member 52 bites into the mantle door 12 and the like. This method is effective when it is difficult to remove by this method.

  Next, a rotary crusher according to another embodiment of the present invention will be described with reference to the drawings.

  In the following description, parts different from those of the above-described embodiment will be mainly described, and unless otherwise specified, the same as in the above-described embodiment, unless there is a contradiction with the following description.

  As shown in FIGS. 4 and 5, in the present embodiment, a truncated conical tube-shaped annular member 62 is formed on the outer peripheral surface of the lower part of the mantle door 12 with its inner peripheral surface and the outer peripheral surface of the mantle door 12. Are attached by shrink fitting. A frustoconical mantle 13 is fitted on the outer peripheral surface of the annular member 62 by shrink fitting.

  In this embodiment, the annular member 62 is deformed relative to the mantle door 12 by the degree of wear of the outer peripheral surface of the mantle 13, the load on the mantle 13, etc. In order to prevent sliding, a recess is formed at a position where the outer peripheral surface of the mantle door 12 and the inner peripheral surface of the annular member 62 face each other, and a key 63 for preventing rotation is driven from below the annular member 62. It is out. The cross-sectional shape of the key 63 is a substantially rectangular or other polygon.

  In the present embodiment, the thickness of the annular member 62 is ensured to be thicker than the annular member 52 in the above-described embodiment (FIGS. 2 and 3), and the key structure can be prevented from rotating. Thereby, in this embodiment, the detent performance is improving more.

  The mantle door 12, the annular member 62, the mantle 13 and the like are configured as shown in FIG. In FIG. 5, the components other than the mantle door 12, the annular member 52, the mantle 13 and the like are not shown.

  In the present embodiment, the annular member 62 is attached to the mantle door 12 from below the mantle door 12. After the annular member 62 is fitted to the mantle door 12, the rotation-preventing key 63 is inserted into a recess formed at a position facing the outer peripheral surface of the mantle door 12 and the inner peripheral surface of the annular member 62 from below. Type in.

  When the annular member 62 is fitted to the mantle door 12, alignment between the outer peripheral surface of the mantle door 12 and the concave portion formed at a position facing the inner peripheral surface of the annular member 62 is performed.

  Thereafter, in order to prevent rotation, the holding member 64 that supports the annular member 62 and the key 63 may be fixed to the bottom surface of the mantle door 12 with a bolt 65.

  Note that the number of fixing portions by the key 63 is the same as in the above-described embodiment (FIGS. 2 and 3).

  In the present embodiment, the annular member 62, the key 63, and the pressing member 64 are attached from below the mantle door 12, and the mantle 13 is attached to the mantle door 12 from above.

  However, the fitting surface of the outer peripheral surface of the mantle door 12 and the inner peripheral surface of the annular member 62 is formed as a downwardly expanding truncated conical surface, etc. The member 62 can be mounted on the mantle door 12 from above, and the weight of the annular member 62 can be supported by the lower outer peripheral surface of the mantle door 12.

  With such a structure, the fitting of the annular member 62 to the mantle door 12 can be performed by hanging from above. In the case of this structure, the function of the presser member 64 is basically reduced to prevent the key 63 from falling, so that the burden on the presser member 64 is reduced and the mantle door of the mantle 13 including the annular member 62 is reduced. Assembling work to 12 becomes easy.

  As described above, according to the rotary crusher according to each of the above embodiments, the annular members 52, 62 are provided on the outer peripheral surface of the mantle door 12, and the mantle is provided on the outer peripheral surfaces of the annular members 52, 62. By connecting 13, it becomes possible to replace only the parts that are damaged or worn, so that replacement and repair can be carried out very easily and in a short time.

  In addition, annular members 52 and 62 are provided below the mantle 13 and the mantle door 12 where the load is greatest and damage and wear are most likely to occur in the rotary crusher, and cushioning members are provided in other portions. As a result, it is possible to prevent breakage and wear of the mantle door 12.

  In addition, by connecting the inner peripheral surface of the annular members 52 and 62 and the outer peripheral surface of the mantle door 12 by shrink fitting, the annular members 52 and 62 and the mantle door 12 can be securely connected and heated by a heater or the like. The annular members 52 and 62 can be easily removed from the mantle door 12 by cutting the annular members 52 and 62.

  Further, as described above, by forming holes and recesses in the annular members 52 and 62 and the mantle door 12 and fitting the fixing members there, the connection between the mantle door 12 and the annular members 52 and 62 can be further strengthened. In particular, even when the tight connection between the annular members 52 and 62 and the mantle door 12 is weakened, the annular members 52 and 62 can be prevented from rotating. As a result, it is possible to prevent wear of the mantle door 12 due to the rotation of the annular members 52 and 62.

DESCRIPTION OF SYMBOLS 1 Upper frame 2 Lower frame 3 Eccentric shaft hole 4 Sleeve 5 Main shaft 6 Lower bearing 7 Hydraulic cylinder 8 Piston 9 Upper bearing 12 Mantle door 13 Mantle 14 Cone cave 16 Crushing chamber 19 Bevel gear 22 Pulley 52, 62 Annular member 53 Pin 55, 65 Bolt 57 Pin insertion hole 58 Pin insertion recesses 59 and 64 Presser member 63 Key (fixing member)

Claims (4)

Corn cave provided inside the frame,
A mantle door that is rotatably arranged inside the cone cave and has a frustoconical outer peripheral surface,
A mantle attached to the outer peripheral surface of the mantle door, and having a frustoconical outer peripheral surface;
An annular member is detachably provided on the outer peripheral surface of the mantle door,
The mantle is a rotary crusher connected to the outer peripheral surface of the annular member. The annular member is connected to the lower part of the mantle door;
The rotary crusher according to claim 1, wherein a buffer member is provided in a space between an outer peripheral surface of the mantle door and an inner peripheral surface of the mantle above the annular member.   The rotatory crusher according to claim 1 or 2, wherein an inner peripheral surface of the annular member and an outer peripheral surface of the mantle door are connected by shrink fitting. At least one place in the circumferential direction on the contact surface between the inner peripheral surface of the annular member and the outer peripheral surface of the mantle door, a through hole or a recess is formed in the annular member and the mantle door,
The rotative crusher according to any one of claims 1 to 3, wherein a fixing member for preventing rotation of the annular member with respect to the mantle door is inserted into the through hole or the concave portion.

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