JPH07114977B2 - Liner for cone crusher - Google Patents

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.

[Conventional technology]

Conventionally, this kind of cone crusher liner is designed based on a pair of upper and lower liner shapes that form a crushing chamber that seems to perform the most preferable crushing action, that is, a combination of the shape of the cone cave liner and the mantle liner. Was there. Therefore, the preferable shape of the crushing chamber was gradually lost with the aging of the liner due to wear, and the crushing ability was lowered and other obstacles occurred.

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, due to the crushing action of the crushing chamber, the pair of upper and lower liners that form the crushing chamber selectively undergoes rapid wear, i.e., local wear progresses, and as a result, local partial deviation occurs. Due to wear, the shape of the crushing chamber becomes extremely different from the original design (when the liner is new), and the crushing performance is reduced, increasing power consumption, increasing mechanical vibration, and increasing normal operation. This would lead to an impossible situation. Even if the operation is stopped and the wear liner is replaced with a new liner in order to avoid this situation, there are some places where the wear is uneven and extremely worn, and some places are relatively worn. 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 crusher liner of the first invention, the eccentric angle of the mantle is 1.5 ° to 3 °, and the mantle inclination angle is 30 ° to 60 °. In the cone cave liner and the mantle liner that form the crushing chamber, a protrusion protruding inward is provided over the entire circumference at a substantially intermediate height position of the vertical portion of the inner surface of the cone cave liner.

In the cone crusher liner of the second invention, the eccentric angle of the mantle is 1.5 ° to 3 °, and the mantle inclination angle is 30 ° to 60 ° to form the crushing chamber of the corn crusher for crushing particles. In the cone cave liner and the mantle liner, a portion lower than a position at a substantially intermediate height of a vertical portion of an inner surface of the cone cave liner is notched along the entire circumference to form a recess.

[Work]

Since the cone crusher liner of the present invention is configured as described above, the raw material present between the mantle liner and the upper cone cave liner and the lower mantle liner by the high-speed rotation accompanied by the eccentricity of the mantle. Even if there is a significant vertical movement of the cone cave liner, the sliding wear action of the raw material on the vertical part of the inner surface of the cone cave is obstructed, abnormal wear is avoided on the vertical part of the inner surface of the cone cave liner, the life is extended, and the wear progresses. 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 product, and in the state just before replacement of the liner when the wear limit is reached, the remaining wall thickness of the upper and lower liners becomes almost equal, so it is economical. Will be advantageous.

〔Example〕

 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 main part of a pair of upper and lower liners showing an embodiment of the first invention. FIG. 3 is a sectional view showing a main part of a pair of upper and lower liners showing another embodiment (embodiment of the second invention).

Alternatively, FIGS. 4, 5, and 6 show an example of a conventional cone classifier, and FIG. 4 (a) shows a state in which the mantle liner is lowered (open state), and FIG. 4 (b). Shows a state where the mantle liner is raised (closed state), and FIG. 5 is a side sectional view showing a worn state of the cone cave liner.
Further, FIG. 6 is a cross-sectional view of essential parts showing the behavior of the raw material in the crushing chamber.

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 excentric rich 3 from a slightly diagonal direction vertically rotates while performing eccentric motion. To do. 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.

The cone cabling 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 the raw materials, are made of wear-resistant materials, so that they can be replaced when the wear reaches the limit. It has a structure.

FIG. 4 shows a pair of upper and lower liner shapes of a conventional cone crusher, and when the mantle liner of FIG. 4 (a) is lowered, that is, when the crushing chamber 7 is in the open state, the cone cable liner as shown in FIG. Height from upper end to upper surface of raw material h ₁
When the mantle liner of Fig. 4 (b) was raised, that is, when the crushing chamber 7 was closed,
changes to h _2, the height difference Δh = h ₁ -h ₂ as the inner surface vertical portion 9a of Konkebu liner 9 feedstock moves up and down, with abrasive action of the sliding of the repetition, this part of the other The progress of wear is sometimes remarkable as compared with the part. Then, in the extreme state of progress of wear, as shown in FIG. 5, it becomes an uneven wear portion 9w, and the cone cave liner 9 is separated into upper and lower parts and falls off.

As described above, the cone cave liner 9 described in FIGS. 4 and 5
As shown in FIG. 6, the mantle liner 8 is reciprocally reciprocated at a distance S ₁ with respect to the cone / cave liner 9 in a fixed and stationary state, as shown in FIG. While the exercise continues, the mantle descends to move the raw material group X to the raw material group Y, and the mantle rises to move the raw material group Y to the raw material group X again. As a result, the raw material reciprocates within the distance S _{2 on} the inner surface of the cone cave liner,
By rotating the mantle at high speed, that is, by repeating a high cycle of 200 to 350 times per minute, uneven wear (9w portion in the drawing) shown in FIG. 5 is caused.

The present invention is intended to eliminate the uneven wear caused by these phenomena as much as possible, and in the first invention, the projection 9b shown in FIG. It was installed at the height of. That is,
By providing a protrusion 9b with length a (5 to 25 mm) on the inner surface side, the lower surface of the protrusion suppresses the vertical movement of the raw material due to the vertical movement of the mantle, and the sliding wear on the inner surface of the vertical portion of the raw material is drastically reduced. To do. Due to the effect of suppressing the lower surface of the projection 9b, the raw material is simply subjected to repeated operations of rising and collapsing as indicated by the height H in the vicinity of the central portion shown in FIG. 2, and the inner surface of the vertical portion is much worn. Absent.

Further, in the second aspect of the invention, as shown in FIG. 3, instead of providing the protrusions, a portion of the cone cave liner below the position at approximately the intermediate height of the inner surface vertical portion has a dimension b over the entire circumference.
(5 to 20 mm) is cut out to form a concave portion 9c, which has the same function as that of the lower surface of the protrusion, and its operation and effect are the same as the first invention in principle.

By providing such protrusions and recesses, the above-mentioned selective uneven wear is suppressed in the cone cabling, and only the average normal wear occurs, so the life of the cone cabling is extended, and Since the liner retains its ideal shape in the initial stage of motion for a long time, the crushing efficiency is good and the maintainability is improved.

〔The invention's effect〕

As described above, since the cone crusher liner of the present invention is provided with the projection or the cutout recessed portion on the inner surface vertical portion of the cone cave liner over the entire circumference, uneven wear of the cone cave liner is drastically reduced, and the liner has the minimum thickness. It can be used up to the limit of thickness 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, FIG. 2 is a cross-sectional view of an essential part of a pair of upper and lower liners showing one embodiment of the present invention, and FIG. Cross-sectional views of a pair of upper and lower liners showing another embodiment, FIG. 4, FIG. 5, and FIG. 6 show an embodiment of a pair of upper and lower liners of a conventional cone crusher, and FIG. The mantle is lowered, and FIG. 4 (b) shows the mantle raised. FIG. 5 is a cross-sectional view of an essential part showing a worn state, and FIG. 6 is a cross-sectional view of an essential part modeling the behavior of the raw material. 5 ... Mantle, 6 ... Cone cave, 7 ... Shredding chamber,
8 ... Mantle liner, 9 ... Cone cabling, 9a
…… Vertical part, 9b …… Projection, 9c …… Recessed part, 9w …… Uneven wear part.

Claims (2)

[Claims] 1. A corn cave liner and a mantle liner which form a crushing chamber of a corn crusher for crushing particles with a mantle having an eccentric angle of 1.5 ° to 3 ° and a mantle inclination angle of 30 ° to 60 °. A liner for a cone crusher, which is provided with a protrusion projecting inward over the entire circumference at a substantially intermediate height position of a vertical portion of an inner surface of the liner for cone cave. 2. A corn cave liner and a mantle liner for forming a crushing chamber of a corn crusher for crushing particles with a mantle having an eccentric angle of 1.5 ° to 3 ° and a mantle inclination angle of 30 ° to 60 °. A liner for a cone crusher, which is formed by notching a concave portion along the entire circumference of a portion below a position of an intermediate height of a vertical portion of an inner surface of the cone cave liner.