JPH0679669B2 - Liner for cone crusher - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cone cave liner and a mantle liner of a cone crusher for producing coarse aggregate and fine aggregate used for concrete and asphalt mixture.

[Prior Art] Conventionally, this type of cone crusher liner has a pair of upper and lower liner shapes that form a crushing chamber that is considered to perform the most preferable crushing action, that is, a combination of the shape of the cone cave liner and the shape of the mantle liner. It was designed basically. Therefore, the preferable shape of the crushing chamber is gradually lost with the lapse of time due to the wear of the liner, and the crushing ability is lowered and other obstacles are generated.

Therefore, as measures against wear, measures such as selecting a liner made of wear-resistant material such as prolonging life, and devising the shape of the crushing chamber have been tried, but essentially stop wear. Since it is difficult, it could not be a drastic measure.

[Problems to be Solved by the Invention] As described above, a phenomenon in which a pair of upper and lower liners forming the crushing chamber selectively undergoes severe wear progress, that is, local wear progresses, due to the crushing action of the crushing chamber. As a result, uneven wear partially occurs, the shape of the crushing chamber becomes extremely irregular compared to the original design (when the liner is new), and the crushing performance decreases and the power consumption increases. This has led to an increase in mechanical vibration and an inability to continue normal operation. Even if the operation is stopped and the worn liner is replaced with a new liner in order to avoid this situation, there are some areas where the wear is uneven and extremely worn, and some areas where the wear is relatively small. It was uneconomical to replace it.

Therefore, it is desired to take measures to eliminate the above-mentioned inconveniences (change in 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 wear the liner uniformly without waste. .

[Means for Solving the Problems] In order to solve the above problems, in the present invention, a liner and a mantle for a cone cave forming a crushing chamber of a corn crusher for crushing particles with a mantle inclination angle of 30 ° to 60 °. The liner for cone cave is made thicker than the liner for the mantle, the outer diameter of the liner for cone cave is made 10 to 40 mm larger than the outer diameter of the liner for mantle, and the cone cave is The liner and the mantle liner are formed with an annular gap having a substantially triangular cross-section inclined toward the center with respect to the vertical in the outermost peripheral portion.

[Operation] Since the cone crusher liner of the present invention is configured as described above, it is possible to avoid a large change in the shape of the crushing chamber formed by the upper and lower liners at the time of new article due to the progress of wear, and In the state just before the liner is replaced when the wear limit is reached, the remaining wall thicknesses of the upper and lower liners become substantially equal, which is economically advantageous.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

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

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

In the figure, 1 is a counter shaft, 2 is a bevel gear,
3 is 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 cabeler.

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

When the counter shaft 1 is driven by a V-belt by an electric motor (not shown), the eccentric 3 is rotationally driven through the bevel gear 2, and the main shaft 4 that is fitted into the eccentric 3 from a slightly diagonal direction vertically rotates while performing eccentric motion. . Therefore, the mantle 5 integrated with the main shaft 4 also performs the eccentric rotational movement.
With the rotation of this mantle 5, the cone-shaped mantle 5
The mantle liner 8 attached to the outer peripheral part of the machine moves up and down at the same time while rotating, and the raw material is crushed in the crushing chamber 7 which is a space formed by the lower surface of the cone cable liner 9 attached to the fixed cone cable 6. Is crushed.

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

FIG. 4 shows a pair of upper and lower liners of a conventional cone crusher. In the new cone crusher shown in FIG. 4 (a), both the cone cable liner 9 and the mantle liner 8 have the dimension A in the height direction of the outer peripheral end. However, the wear progresses after use and the fourth
Immediately before the replacement in FIG. 6B, the position indicated by the reference symbol P has almost no wall thickness and is broken and is about to fall off. At this time, the wall thickness in the height direction of the outer periphery of the cone cable liner 9 becomes about 1/2 A,
The wear is remarkable compared to 2 / 3A of the mantle liner 8.

Therefore, in the present invention, in consideration of these phenomena, in order to increase the wall thickness of the cone cabling to be 1.5 to 2 times larger than the wall thickness of the mantle liner when it is new, as shown in FIG. Liner wall thickness Aa
For this, select cone cone liner size A + a. a
When the dimensions are properly selected, as shown in FIG. 3 (b), both of them have a thickness dimension of about 1/4 A at the wear limit.

The size a is appropriately selected in the range of, for example, 10 to 50 mm in consideration of the model number of the crusher, the properties of the crushing raw material, and the like.

In the operation record, as described above, the wear rate of the liner is higher than that of the cone cabling liner 9 on the fixed side (upper side) than the mantle liner 8 on the movable side (lower side), and the wear amount of the liner tip (outer peripheral side). Since the crushing action is more active on the far side (center side), the amount of wear on the far side is severe.

Therefore, as shown in the shape of the mantle liner 8 in FIG. 4 (b), the mantle liner inclination angle θ gradually decreases in the vicinity of the lower end (mantle inclination angle θ ′), and the descending speed of the raw material deteriorates. Even further in this part, the over-crushing action is continued and the abrasion action is promoted, and the crushing chamber has a shape of a middle bulge, that is, a stomach-bag-like shape, even though the thickness of the tip outer peripheral portion is sufficient, The thickness of the middle part near the center is severely worn and becomes extremely thin, and for example, it is damaged at point P in FIG. 4 (b), falls off, and becomes inoperable.

In order to eliminate the above-mentioned irrational wear state, in the present invention, the cone cable liner is made thicker than the mantle liner as described above, and as shown in FIGS. 2 (a) and 3 At the outermost peripheral portions of the liner 9 and the mantle liner 8, annular gaps T, T having a substantially triangular cross-section inclined toward the center side with respect to the vertical plane by a dimension C are provided.

By doing so, for example, in the case of FIG. 2 (a), even at the wear limit, as shown in FIG. 4 (b), it has a stomach-like shape (for example, in the case of the mantle liner 8, it is like a mantle like a ski jumping table). (The phenomenon that the liner inclination angle θ gradually decreases) and the mantle inclination angle is maintained at the initial θ as shown in FIG. 2 (b), so that the above-mentioned overcrushing and local wear of the intermediate portion are reduced. In addition, the crushing is performed normally.

Further, as shown in FIG. 3, the cone cabling 9 is oversized by a radius b compared with the mantle liner 8, that is, the diameter is set to D + 2b because the mantle liner on the lower side as the wear progresses due to continuous operation. As described above, the outer peripheral portion of 8 has a ski jump trapezoidal shape, and the problem that the mantle liner inclination angle θ of the outer peripheral portion becomes gradually small is eliminated. The liner 9 is used to strike to cause plastic deformation or wear. That is,
Since the upper cone cable liner 9 is also provided with a void T, the outermost diameter portion of the cone cable liner moves to the inside as shown in FIG. 3 (b) as the wear progresses. Sometimes the outer diameter is increased by 2b.

In this way, even when the liner wears as shown in FIG. 3 (b) (wears up to the chain double-dashed line in the figure), the parallel gap between the pair of upper and lower liners having the liner inclination angle θ is the same as that of a new liner. Since it can be held, the deterioration of the crushing performance due to the progress of wear can be suppressed as much as possible. The b dimension is appropriately selected from 5 to 20 mm. Also, the C dimension is appropriately selected within the range of 10 to 50 mm in consideration of operating conditions and wear conditions.

[Effects of the Invention] As described above, in the liner for cone crusher of the present invention, the thickness of the liner for cone cave is made thicker than that of the liner for mantle, and the outer diameter of the liner for cone cave is 10 to 10 mm larger than the outer diameter of the mantle liner. In addition to making it 40 mm larger, an annular gap with a roughly triangular cross section was provided in the outermost peripheral parts of the cone cave liner and the mantle liner, so the tip part (outer peripheral part) due to wear bounces (ski jump trapezoidal shape) Is eliminated and the inclination close to that of a new product is maintained, and the liner can be used up to the minimum wall thickness limit point without waste. Therefore, the life of the liner is extended to about 1.5 to 2 times, and the crushing in the crushing chamber can be efficiently operated, so that the load current of the electric motor is stabilized and the power consumption is reduced, so that the running cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional perspective view showing the structure of a cone crusher which is an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the essential parts of a pair of upper and lower liners showing one embodiment of the present invention. Shows when the liner is new, and FIG. 2B shows when the liner is worn. FIG. 3 is a cross-sectional view of essential parts of a pair of upper and lower liners showing another embodiment of the present invention, and FIG. 3 (a) shows a new liner.
Figure (b) shows when the liner is worn. FIG. 4 shows an embodiment of a pair of upper and lower liners of a conventional cone crusher. FIG. 4 (a) shows a new liner and FIG. 4 (b) shows a liner worn. 5 ... Mantle, 6 ... Cone cave, 7 ... Shredding chamber,
8 …… Mantle liner, 9 …… Cone cabling, T
…… Annular void, θ …… Mantle liner tilt angle, θ ′…
… Mantle liner tilt angle (when worn).

Claims (1)

[Claims] 1. A liner for corn cave and a liner for mantle forming a crushing chamber of a corn crusher for crushing particles with a mantle inclination angle of 30 ° to 60 °, wherein the wall thickness of the liner for corn cave is the same as that of the liner for mantle. The thickness is made thicker than the wall thickness, the outer diameter of the cone cave liner is made 10 to 40 mm larger than the outer diameter of the mantle liner, and the outermost portion of the cone cave liner and the mantle liner is centered with respect to the vertical. A liner for a cone crusher, which is formed by forming an annular void having a substantially triangular cross section inclined to the side.