Rotating Crusher

Abstract

To provide a gyratory crusher which enables replacement and repair to be performed easily at low costs when a slide portion is worn.SOLUTION: A gyratory crusher has: a cylindrical bowl 5 in which a bowl liner 4 is formed on a surface; a spindle 17 which rotates in a state of being inclined with respect to a rotary shaft 13 which rotates around a vertical axis; a mantle core 19 which is provided so as to be swung by the spindle 17 and in which a mantle 7 is formed on a surface facing the bowl liner 4; a slide member 23 in which a spherical part 27 constituted of a part of a spherical surface protruding downward is formed on a bottom surface and which is provided below the mantle core 19; and a thrust part 28 which supports the spherical part 27 of the slide member 23 from below in a slidable manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gyratory crusher and a repair part for the gyratory crusher. [Background technology]

[0002] A gyratory crusher (cone crusher) may be used to further crush (secondarily, tertiary, or quaternary crush) materials that have been primarily crushed by a crusher such as a jaw crusher to obtain a desired particle size. As shown in Patent Document 1 below, for example, this gyratory crusher further crushes the materials that have been primarily crushed by biting them between a mantle 9 provided on the surface of a rotating mantle core 8 and a bowl liner 10 provided on the surface of a bowl 21.

[0003] In this type of gyratory crusher, crushing is performed by continuously changing the outlet gap between the bowl liner 10 and the gyrating mantle 9 along the circumference. In other words, crushing is performed at the part where the outlet gap is smallest, and the crushed material P is discharged from the part opposite in the circumferential direction where the outlet gap is largest. The particle size of the crushed material is adjusted by changing the gap between the mantle 9 and the bowl liner 10.

[0004] The bottom surface (crushing head) of the mantle core 8 is hemispherical and protrudes downward. This bottom surface is supported rotatably and slidably on a thrust sheet 16 provided on the upper surface of the frame 1 (lower frame 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-159824 Summary of the Invention [Problem to be solved by the invention]

[0006] In the gyratory crusher disclosed in Patent Document 1, the bottom surface of the mantle core 8 gradually wears due to rotational sliding between the thrust sheet 16 and the mantle core 8, necessitating replacement or repair of the mantle core 8. However, the mantle core 8 is a large component that is difficult to handle, and furthermore, machining the bottom surface of such a large component into a hemispherical shape is difficult and costly.

[0007] Therefore, an object of the present invention is to easily and inexpensively replace or repair the sliding parts of a gyratory crusher when they become worn. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides: a cylindrical bowl having a bowl liner formed on its surface; a main shaft that rotates in a state inclined with respect to a rotation axis that rotates around a vertical axis; a mantle core provided to be oscillated and rotated by the main shaft, the mantle having a surface facing the bowl liner; a sliding member provided below the mantle core, the sliding member having a spherical surface portion formed on the bottom surface thereof and consisting of a part of a spherical surface protruding downward; a thrust portion that slidably supports the spherical portion of the sliding member from below; A gyratory crusher having the above structure was constructed.

[0009] In this way, when wear occurs, it is only necessary to replace or repair the relatively small sliding member instead of the large mantle core, and this work can be carried out easily and at low cost.

[0010] In the above configuration, It is preferable that the sliding member has a fixed portion fixed to the underside of the mantle core, and a sliding portion provided below the fixed portion and rotatable circumferentially relative to the fixed portion, and that the spherical portion is formed on the bottom surface of the sliding portion.

[0011] In this way, there is no need to fix the sliding portion that is subject to wear to the mantle core, so replacement or repair work can be carried out smoothly.

[0012] In each of the above configurations, It is preferable that a flat portion is formed on the lower surface of the mantle core, and the sliding member is provided so as to face the flat portion.

[0013] In this way, the sliding member can be attached to the lower surface of the mantle core, which has been machined to be flat, and the attachment work can be carried out more smoothly than when the bottom surface is spherical.

[0014] In each of the above configurations, It is preferable that an oil fence be provided on the outer circumferential side of the sliding member and the thrust portion on the lower surface of the mantle core, the oil fence being detachable from the mantle core.

[0015] This prevents the underside of the mantle core from sliding against the oil boom, reducing the frequency of replacement of the oil boom due to wear. Furthermore, by temporarily removing the oil boom while it is still attached, the sliding members and thrust section on its inner periphery can be easily replaced or repaired.

[0016] In order to solve the above problems, the present invention provides: a sliding member provided below the mantle core, the sliding member having a spherical surface portion formed on the bottom surface thereof and consisting of a part of a spherical surface protruding downward; a thrust portion that slidably supports the spherical portion of the sliding member from below; A repair member for a gyratory crusher having the above structure was constructed.

[0017] This allows smooth repair work of worn mantle cores. [Effects of the Invention]

[0018] In the present invention, instead of forming a spherical portion on the underside of a large mantle core, a spherical portion is formed on a relatively small sliding member, and when this spherical portion wears out, only the sliding member needs to be replaced or repaired. Therefore, when the sliding parts of the gyratory crusher wear out, replacement or repair can be carried out easily and at low cost. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a cross-sectional view showing one embodiment of a gyratory crusher according to the present invention; [Figure 2] FIG. 2 is a cross-sectional view showing the main parts of the gyratory crusher shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view showing a first modified example of the main part of the gyratory crusher shown in FIG. [Figure 4] FIG. 3 is a cross-sectional view showing a second modified example of the main part of the gyratory crusher shown in FIG. [Figure 5] FIG. 3 is a cross-sectional view showing a third modified example of the main part of the gyratory crusher shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment of a gyro crusher (cone crusher) according to the present invention will be described with reference to the drawings. The gyro crusher shown in Fig. 1 has a machine frame 1 made up of an upper frame 2 and a lower frame 3.

[0021] A cylindrical bowl 5 with a crushing bowl liner 4 formed on its inner surface is provided inside the upper frame 2. An annular hydraulic cylinder 6 is provided between the upper frame 2 and the bowl 5, spanning the entire circumference. This hydraulic cylinder 6 is a double-acting type with an upper hydraulic chamber 6a and a lower hydraulic chamber 6b. By supplying and discharging hydraulic oil to both hydraulic chambers 6a, 6b, the bowl 5 can be moved up and down, thereby adjusting the size of the gap s between the bowl liner 4 and the mantle 7, which will be described later.

[0022] Packings 8 and 9 are provided between the upper frame 2 and the bowl 5. Similarly, a packing 11 is provided between the bowl 5 and a packing retainer 10 that is fixed to the upper end of the upper frame 2 and seals the upper hydraulic chamber 6a. These packings 8, 9, and 11 prevent leakage of hydraulic oil. Furthermore, a dust seal 12 prevents dust from entering the hydraulic cylinder 6.

[0023] In the center of the lower frame 3, there is formed a cylindrical portion 14 that rotatably holds a rotating shaft 13 that rotates around a vertical axis, and a holding portion 15 that extends horizontally outward from the cylindrical portion 14.

[0024] The rotating shaft 13 is formed with an inclined hole 16 that is inclined from the vertical direction. The lower part of a main shaft 17 is rotatably inserted into the inclined hole 16. The main shaft 17 rotates while being inclined relative to the rotating shaft 13. An inner bushing 18 is provided between the inner surface of the inclined hole 16 and the outer surface of the main shaft 17. The main shaft 17 is provided with a mantle core 19 that oscillates and rotates as the main shaft 17 rotates. A crushing mantle 7 is formed on the surface of the mantle core 19 facing the bowl liner 4. In addition, a flat portion 20 that follows the horizontal plane is formed on the underside of the mantle core 19.

[0025] The rotating shaft 13 is supported by a bearing (not shown) provided at the bottom of the cylindrical portion 14, and is rotated by a driving force applied from a drive source (not shown) via a pulley 21, a bevel gear (not shown), etc. An outer bushing 22 is provided between the outer surface of the rotating shaft 13 and the inner surface of the cylindrical portion 14. When the rotating shaft 13 rotates, the mantle 7 (mantle core 19) provided on the main shaft 17, which is inclined relative to the rotating shaft 13, orbits.

[0026] A sliding member 23 is provided below the mantle core 19. As shown in detail in FIG. 2, the sliding member 23 has a fixed portion 24 fixed to the underside of the mantle core 19 and a sliding portion 25 that can rotate circumferentially relative to the fixed portion 24. The fixed portion 24 is an annular member made of steel plate with flat upper and lower surfaces, and its upper surface is fixed by bolts 26 so as to face the flat portion 20 formed on the mantle core 19. The sliding portion 25 is an annular member made of a resin material, and its upper surface is a flat surface that conforms to the lower surface of the fixed portion 24. The bottom surface of the sliding portion 25 is formed with a spherical portion 27 that is a part of a spherical surface that protrudes downward. The sliding portion 25 is not fixed to either the fixed portion 24 or a thrust portion 28 (described later) but is simply sandwiched between them, so it can freely rotate around the central axis of the ring as the mantle core 19 swings. The material of the sliding portion 25 may also be a metal material such as gunmetal.

[0027] The sliding member 23 (spherical portion 27 formed on the sliding portion 25) is rotatably supported by a cast steel thrust portion 28 fixed by a bolt 29 to the upper part of the tubular portion 14 of the machine frame 1. A spherical recess 30 is formed on the upper surface of the thrust portion 28 to receive the spherical portion 27 formed on the sliding member 23 (sliding portion 25). When the mantle 7 (mantle core 19) rotates, sliding occurs between the spherical portion 27 formed on the sliding portion 25 and the spherical recess 30 of the thrust portion 28. The material of the thrust portion 28 may also be other metal materials or resin materials.

[0028] An oil fence 31 is provided on the outer periphery of the sliding member 23 and the thrust portion 28 to prevent the lubricating oil that lubricates the sliding member 23 from leaking outward. The oil fence 31 is a member with an L-shaped circumferential cross section that extends downward from the underside of the mantle core 19, and its upper end is detachably fixed with bolts 32 to the flat portion 20 formed on the underside of the mantle core 19. The oil fence 31 also has the effect of preventing the sliding portion 25, which is not fixed to any member, from departing if it is about to do so during rotation.

[0029] In this embodiment, both the sliding member 23 and the oil fence 31 are fixed to the flat portion 20, but it is also possible that only one of them is fixed to the flat portion 20, or that the flat portion 20 is not formed on the bottom surface of the mantle core 19.

[0030] As shown in FIG. 1, a dust cover 33 is provided at the upper end of the bowl 5.

[0031] A hopper 34 for feeding crushed materials P is provided inside the dust cover 33. When the crushed materials P are fed into this hopper 34 and the rotary shaft 13 is rotated, the mantle core 19 rotates via the main shaft 17. As a result, the crushed materials P, such as rocks, become caught between the mantle 7 and the bowl liner 4, and crushed materials P', which have been crushed to a predetermined size, are discharged through the gap s between the mantle 7 and the bowl liner 4. As crushing progresses, the mantle 7 and the bowl liner 4 wear, changing the size of the gap s between them. At that time, the hydraulic cylinder 6 is operated to raise and lower the bowl liner 4 relative to the mantle 7, thereby maintaining the size of the gap s at a predetermined value.

[0032] In the above-mentioned gyratory crusher, the spherical portion 27 is formed on the bottom surface of the sliding member 23 (sliding portion 25), which is a separate member from the mantle core 19. Therefore, when this spherical portion 27 wears out, it is only necessary to replace or repair the relatively small sliding member 23 instead of the large mantle core 19. This makes it possible to carry out this work easily and at low cost.

[0033] Furthermore, in the above-mentioned gyratory crusher, the sliding member 23 is composed of two members, the fixed portion 24 and the sliding portion 25, and the fixed portion 24 is fixed to the mantle core 19, thereby improving the sliding stability of the sliding portion 25 provided below the fixed portion 24.

[0034] Furthermore, the above-mentioned gyratory crusher is configured so that a flat portion 20 is formed on the underside of the mantle core 19 and the sliding member 23 and oil fence 31 are attached to this flat portion 20, so that the operation can be carried out more smoothly compared to when the sliding member 23 and oil fence 31 are attached to a spherical surface.

[0035] Furthermore, in the above-described gyro crusher, the oil boom 31 is detachably attached to the underside of the mantle core 19, which prevents wear on the oil boom 31, unlike a configuration in which the mantle core 19 and the oil boom 31 are in sliding contact with each other. This makes it possible to extend the life of the oil boom 31. Furthermore, by removing the oil boom 31, work to replace or repair the sliding member 23 and thrust section 28 provided inside it can be carried out smoothly.

[0036] The sliding member 23, which has the spherical portion 27 formed from a portion of a sphere protruding downward from its bottom surface and is provided below the mantle core 19, and the thrust portion 28, which slidably supports the spherical portion 27 of the sliding member 23 from below, can also be prepared as repair parts for the above-mentioned gyratory crusher. In this way, when worn parts need to be replaced, the work can be carried out quickly.

[0037] The main parts of a first modified example of the above-mentioned gyro-type crusher are shown in Figure 3. This first modified example differs from the above-mentioned one only in that the sliding member 23 is constructed from a single member, but in all other respects it is the same as the above-mentioned one. This sliding member 23 is directly fixed with bolts 26 so that its upper surface faces the flat portion 20 formed on the mantle core 19. In this first modified example as well, when the spherical portion 27 formed on the bottom surface of the sliding member 23 becomes worn, it is only necessary to replace or repair the relatively small sliding member 23 instead of the large mantle core 19. This makes the work easy and inexpensive to perform.

[0038] The main parts of a second modified example of the above-mentioned gyro-type crusher are shown in Figure 4. This second modified example differs from the above-mentioned one only in that a sliding member 23 and an oil fence 31 are provided on a mantle core 19 having a curved bottom surface, but the other features are the same as those of the above-mentioned one. In this second modified example, when wear occurs on the spherical portion 27 formed on the bottom surface of the sliding member 23, only the relatively small sliding member 23 needs to be replaced or repaired instead of the large mantle core 19. This allows the work to be carried out easily and at low cost.

[0039] The main parts of a third modified example of the gyro crusher are shown in Figure 5. This third modified example is a gyro crusher comprising a cylindrical bowl 5 with a bowl liner 4 formed on its surface, a main shaft 17 that rotates at an angle relative to a rotation axis 13 that rotates about a vertical axis, a mantle core 19 that is arranged to oscillate and rotate about the main shaft 17, has a mantle 7 formed on the surface facing the bowl liner 4, and has a spherical portion 35 formed on its bottom surface that protrudes downward and is made of a part of a sphere, a thrust portion 28 that slidably supports the spherical portion 35 of the mantle core 19 from below, and an oil boom 31 that is attachable to and detachable from the mantle core 19 on the outer periphery of the thrust portion 28.

[0040] In the gyro crusher according to the third modified example, the oil boom 31 does not slide against the underside of the mantle core 19, so no wear occurs and it is possible to reduce the frequency of replacing the oil boom 31. In addition, by temporarily removing the oil boom 31 while it is still attached, it is possible to smoothly replace or repair the thrust section 28 provided on its inner periphery.

[0041] The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. Therefore, the scope of the present invention is defined by the claims, not by the above description, and is intended to include the meaning equivalent to the claims and all modifications thereof. [Explanation of symbols]

[0042] 1 Aircraft frame 2 Upper frame 3 Lower frame 4 Bowlliner 5. Baul 6 hydraulic cylinders 6a Upper hydraulic chamber 6b Lower hydraulic chamber 7. Mantle 8, 9, 11 Packing 10 Packing retainer 12 Dust seal 13 Rotation axis 14 Cylinder 15 Holding part 16 Slanted hole 17 Spindle 18 Inner Bush 19 Mantlecoa 20 Flat area 21 Pulley 22 Outa Bush 23 Sliding member 24 Fixed part 25 Sliding part 26, 29, 32 volts 27, 35 Spherical part 28 Thrust section 30 spherical concave 31 Oil Boom 33 Dust cover 34 Hopper s gap P Material to be crushed P' crushed material

Claims

1. a cylindrical bowl (5) having a bowl liner (4) formed on its surface; a main shaft (17) that rotates in a tilted state with respect to a rotation axis (13) that rotates around a vertical axis; a mantle core (19) provided to be oscillated and rotated by the main shaft (17), and having a mantle (7) formed on a surface facing the bowl liner (4); a sliding member (23) provided below the mantle core (19), the sliding member having a spherical portion (27) formed on the bottom surface thereof and consisting of a part of a spherical surface protruding downward; a thrust portion (28) that slidably supports the spherical portion (27) of the sliding member (23) from below; and The sliding member (23) has a fixed portion (24) fixed to the lower surface of the mantle core (19), and a sliding portion (25) provided below the fixed portion (24) and rotatable relative to the fixed portion (24) in the circumferential direction, and the spherical portion (27) is formed on the bottom surface of the sliding portion (25), The sliding portion (25) is not fixed to either the fixed portion (24) or the thrust portion (28), an oil boom (31) detachable from the mantle core (19) is provided on the outer circumferential side of the sliding member (23) and the thrust portion (28) on the lower surface of the mantle core (19); The oil fence (31) prevents the lubricating oil that lubricates the sliding member (23) from leaking outward and prevents the sliding portion (25) from escaping from between the fixed portion (24) and the thrust portion (28).

2. 2. The gyratory crusher according to claim 1, wherein a flat portion (20) is formed on the lower surface of the mantle core (19), and the sliding member (23) is provided so as to face the flat portion (20).

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