JPH04145956A - Liner for cone crusher - Google Patents

Abstract

PURPOSE:To eliminate change in the shape of a crushing chamber, deterioration of crushing performance, increase of electric power consumption and increase of mechanical vibration by thickening the wall thickness of the liner for a concave in comparison with the wall thickness of the liner for a mantle and making the outside diameter of the liner for the concave larger than the liner for the mantle and also forming annular gaps whose cross-sections tilted to the central side for the vertical face show a triangular shape to the outermost circumferential parts of both the liner for the concave and the liner for the mantle. CONSTITUTION:The wall thickness of the liner 9 for a concave is thickened in comparison with the same of the liner 8 for a mantle. Moreover the annular gaps T, T whose cross-sections tilted by dimension C to the central side for the vertical face show a nearly triangular shape are provided to the outermost circumferential parts of both the liner 9 for the concave and the liner 8 for the mantle respectively. Further the outside diameter of the liner 9 is made larger than the outside diameter of the liner 8 by 10-40mm. Thereby rebound phenomena of the tip part (external circumferential part) correspondent to abrasion are solved. While tilting close to a new article is continued, the liners are used to the critical point of the minimum wall thickness without waste Therefore the service life of the liners is prolonged to about 1.5-2 times.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liner for a corn cave and a liner for a mantle of a cone crusher that produces coarse aggregate and fine aggregate used for concrete, asphalt mix, etc.

[Conventional technology]

Conventionally, liners for this type of cone crusher have been designed based on the shape of the pair of upper and lower liners forming the crushing chamber that is thought to provide the most favorable crushing action, that is, the combination of the shapes of the cone cave liner and the mantle liner. was. Therefore, as the liner wears out and changes over time, this preferred crushing chamber shape is gradually lost, resulting in a decrease in crushing capacity and other problems.

For this reason, attempts have been made to take life-extending measures such as selecting a liner made of wear-resistant material and devising the shape of the crushing chamber to prevent wear, but these measures essentially stop wear. Because it is difficult to do so, it could not be a drastic countermeasure.

[Problems to be Solved by the Invention] As described above, the phenomenon in which the pair of upper and lower liners forming the crushing chamber selectively progresses rapidly due to the crushing action of the crushing chamber, that is, local wear progresses. As a result, extremely uneven wear occurs in some parts, and the shape of the crushing chamber becomes extremely irregular compared to the original design (when the liner was new), resulting in decreased crushing performance, increased power consumption, and This resulted in an increase in mechanical vibrations, making it impossible to continue normal operation. In addition, even if you stop the operation and replace the worn liner with a new liner to avoid this situation, there will be areas where the degree of wear is uneven and extremely worn, and areas where the degree of wear is relatively light. It would be uneconomical to replace it with

Therefore, there was a need for a measure to eliminate the above-mentioned disadvantages (changes in the shape of the crushing chamber due to progress of local wear, decrease in crushing performance, increase in power consumption, increase in mechanical vibration, etc.) and to wear the liner uniformly without waste. .

[Means to solve the problem]

In order to solve the above problems, the present invention provides a corn cave liner and a mantle liner that form a crushing chamber of a cone crusher that performs interparticle crushing at a mantle inclination angle of 30° to 60°. The wall thickness is made thicker than that of the mantle liner, and the outer diameter of the corncave liner is made 10 to 40 mm larger than the outer diameter of the mantle liner, and the maximum diameter of the corncave liner and the mantle liner is increased. An annular gap having a substantially triangular cross section inclined toward the center with respect to the vertical is formed on the outer periphery, and the innermost end of the thick part of the mantle liner is aligned horizontally or toward the center of the cone crusher.
The configuration is such that the surface has an inclined surface having an inclination angle of within 0°.

[Effect]

Since the liner for a cone crusher of the present invention is constructed as described above, it is possible to prevent the shape of the crushing chamber formed by the upper and lower liners when new from changing significantly due to progress of wear, and also to prevent the shape of the crushing chamber from changing significantly due to the progress of wear. In the state immediately before liner replacement, the remaining wall thicknesses of the upper and lower liners are approximately equal, which is economically advantageous. In addition, since a horizontally or inwardly sloped surface with an inclination angle of less than 10' is provided at the innermost end of the thick part of the mantle liner, the raw material to be crushed can be smoothly moved from the preliminary crushing chamber to the main crushing surface, so that it can be crushed easily. Increased efficiency. Furthermore, by providing the main slope 12, it has become possible to process larger pieces of material to be crushed.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

1 to 3 show embodiments of the present invention, FIG. 1 is a cross-sectional perspective view showing the structure of a cone crusher, FIG. 2 is a cross-sectional view of a main part of a pair of upper and lower liners, and FIG. ) shows the shape of the liner when it is new, and FIG. 2(b) shows the shape of the liner when it is worn.

Fig. 3 is a sectional view of a main part of a pair of upper and lower liners showing another embodiment, Fig. 3(a) shows the shape of the liner when new, Fig. 3(b)
) shows the shape when the liner is worn out.

Further, FIG. 4 shows an example of a conventional cone crusher, with FIG. 4(a) showing the shape of the liner when it is new, and FIG. 4(b) showing the shape of the liner when it is worn (just before replacement).

In the figure, 1 is a countershaft, 2 is a bevel gear,
3 is an eccentric, 4 is a main shaft, 5 is a mantle, 6 is a cone cave, 7 is a crushing chamber, 8 is a mantle liner, and 9 is a cone cave liner.

Next, the operation of the cone crusher of the present invention will be explained.

When the countershaft 1 is driven by a belt by an electric motor (not shown), the eccentric 3 is rotationally driven via the bevel gear 2, and the main shaft 4, which is inserted into the eccentric 3 from a direction slightly diagonal to the vertical, rotates while performing eccentric movement. . Therefore, the mantle 5 integrated with the main shaft 4 also performs eccentric rotational movement.

Along with this rotation of the mantle 5, the cone-shaped mantle 5
The mantle liner 8 attached to the outer periphery of the mantle liner 8 rotates and moves up and down at the same time. is crushed.

The cone cable liner 9 and the mantle liner 8, which are a pair of upper and lower liners that come into contact with these raw materials and compress and crush them, are made of wear-resistant materials, so that they can be replaced when wear reaches the limit. It has a structure.

Fig. 4 shows the shape of a pair of upper and lower liners of a conventional cone crusher, and the one when new in Fig. 4 (a) has the height dimension of the outer peripheral edge of both concave liner 9 and mantle liner 8. After use, the wear progresses, and when it is about to be replaced as shown in FIG. 4(b), there is almost no wall thickness at the position indicated by P, and it is about to break and fall off. At this time, the wall thickness of the outer peripheral end of the cone cable liner 9 in the height direction is about 172A, and the wear is significant compared to 273A of the mantle liner 8.

Therefore, in the present invention, in consideration of these phenomena, in order to make the wall thickness of the cone cable liner 1.5 to 2 times larger than the wall thickness of the mantle liner when new, the thickness of the cone cable liner shown in Fig. 2 (
As shown in a), the cone cable liner dimension A+a is selected for the mantle liner wall thickness dimension A-a. If 8 dimensions are appropriately selected, as shown in FIG. 2(b), both will have a wall thickness of approximately 1/4A at the wear limit.

Note that the 8 dimensions are appropriately selected in the range of, for example, 10 to 50 mm, taking into consideration the model number of the crusher, the properties of the crushed raw material, etc.

In the operational results, as mentioned above, the cone cable liner 9 on the fixed side (upper side) wears faster than the mantle liner 8 on the movable side (lower side), and the amount of wear on the tip of the liner (outer circumferential side) Since the crushing action is more active on the deeper side (center side), the amount of wear on the deeper side is greater.

Therefore, as shown in the shape of the mantle liner 8 in FIG. 4(b), the mantle liner inclination angle θ gradually decreases (mantle inclination angle θ') near the lower end, and the descending speed of the raw material decreases. In addition, the over-crushing action continues in this part of the layer, and the abrasion action is also promoted, resulting in the shredding chamber having a mid-bulge shape, that is, a stomach pouch-like shape, even though the wall thickness at the outer periphery of the tip is sufficient. , the thickness of the middle part near the center is severely worn and becomes extremely thin, for example, as shown in Fig. 4 (b).
) is damaged and falls off, making it impossible to operate.

In order to eliminate the above-mentioned unreasonable wear condition, in the present invention, in addition to making the cone cable liner thicker than the mantle liner as described above,
Cone cable liner 9, mantle liner 8 as shown
Annular gaps T, T each having a substantially triangular cross section and having a dimension C inclined toward the center with respect to the vertical plane were provided at the outermost periphery of the tube.

By doing this, for example, the mantle liner 8 shown in FIG. 2(a), even at the wear limit, can be shaped like a mantle as shown in FIG. 4(b). The liner inclination angle θ gradually decreases (a phenomenon in which the liner inclination angle θ gradually decreases), but the mantle inclination angle is maintained at the initial θ as shown in Figure 2 (b), so the above-mentioned over-fracture and local wear in the intermediate part are reduced. In addition, crushing is also performed normally.

Further, as shown in Fig. 3, the reason why the cone cable liner 9 is extended by a radius b dimension compared to the mantle liner 8, that is, the diameter is set to D + 2b, is that as wear progresses due to continued operation, the lower mantle liner In order to eliminate the problem that the outer periphery of No. 8 becomes a ski jump trapezoid shape as described above and the mantle liner inclination angle θ at the outer periphery gradually decreases, this raised part is formed into a cone cave when the mantle turns up and down. The purpose is to cause plastic deformation or wear by hitting with the liner 9. That is, since the upper cone cable liner 9 is also provided with a gap T, as wear progresses, the outermost diameter part of the cone cable liner moves inward as shown in FIG. 3(b), so to compensate for this. When new, the outer diameter is increased by 2b in advance.

In this way, even when the liner wears out as shown in Figure 3(b) (wears down to the two-dot chain line in the figure), the upper and lower pair of liners with the liner inclination angle θ can be used in parallel, just like when the liner is new. Since the gap can be maintained, deterioration in crushing performance due to progress of wear can be suppressed as much as possible. Note that the five dimensions are appropriately selected from 5 to 20 mm.

In addition, the C dimension is 10 to 5 in consideration of operating conditions and wear conditions.
It shall be selected as appropriate between 0 mm.

Furthermore, in the present invention, the materials to be crushed having a relatively large particle size in the preliminary crushing chamber 11 are smoothly crushed into the main crushing material at the innermost end 10 (see FIG. 4(a)) of the thick part of the mantle liner 8. Horizontal or inward tilt angle α (α-0 to 10
Since the slope 12 is provided with an angle of 12°, the flow resistance due to the difference in level between the preliminary crushing surface and the main crushing surface is reduced, the crushing efficiency is improved, and the vibration value is reduced to ensure safe operation.

〔Effect of the invention〕

As explained above, in the cone crusher liner of the present invention, the wall thickness of the corn cave liner is made thicker than the wall thickness of the mantle liner, and the outer diameter of the corn cave liner is made 10 to 40 mm larger than the outer diameter of the mantle liner. Most cone cave liners and mantle liners have an annular gap with a roughly triangular cross section at the outermost periphery (therefore, the tip (outer periphery) springs up due to wear (creation of a ski champ trapezoid shape)) The liner can be used up to the limit of its minimum wall thickness without wastage while maintaining a slope close to that of a new product.Therefore, the liner life is approximately 1.
The lifespan is extended by 5 to 2 times, and since the crushing inside the crushing chamber can be operated efficiently, the load current of the motor is stabilized, and power consumption is reduced, so running costs can be significantly reduced.

In addition, since the material to be crushed is moved smoothly from the preliminary crushing surface to the main crushing surface, there is less vibration and crushing efficiency is improved.
Long-term continuous stable operation is possible.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional perspective view showing the structure of a cone crusher according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of a pair of upper and lower liners showing an embodiment of the present invention. Figure 2(b) shows the liner when it is new, and Fig. 2(b) shows the liner when it is worn. FIG. 3 is a cross-sectional view of a main part of a pair of upper and lower liners showing another embodiment of the present invention, and FIG. 3(a) shows the liner when new;
Figure (b) shows the liner when worn. FIG. 4 shows an example of a pair of upper and lower liners for a cone crusher used by a company, with FIG. 4(a) showing the liner when it is new and FIG. 4(b) showing the liner when it is worn. 5... Mantle, 6... Corn cave, 7... Crushing chamber, 8... Mantle liner, 9... Corn cave liner, 10... Thick walled room inner end of mantle liner, 1
1... Preliminary crushing chamber, 12... Inclined surface, T... Annular gap, θ... Mantle liner inclination angle, θ'... Mantle liner inclination angle (at the time of wear), α... Tilt angle.

Claims (1)

[Claims] (1) In corn cave liners and mantle liners that form the crushing chamber of a cone crusher that performs interparticle crushing at a mantle inclination angle of 30° to 60°, the wall thickness of the corncave liner is the wall thickness of the mantle liner. The outside diameter of the corncave liner is made 10 to 40 mm larger than the outside diameter of the mantle liner, and the outermost periphery of the corncave liner and the mantle liner is made vertically toward the center. The inclined cross section forms an annular gap having a substantially triangular shape, and the innermost end of the thick part of the mantle liner is aligned horizontally or 1 toward the center of the cone crusher.
A cone crusher liner with an inclined surface having an inclination angle of less than 0°.