JPH0337715Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a seal structure for a rotary type crusher, particularly for a rotary type crusher such as a cone crusher, a gyratory crusher, etc. that crush ores, slag, earth and sand, etc. Regarding the seal structure of the crusher.

Prior art The rotary crusher 1 that forms the background of this invention is the seventh
As shown in the longitudinal sectional view of the main part shown in the figure, by rotating the substantially truncated conical mantle 3 in an eccentric state within the substantially conical cylindrical concave 2, the concave 2 and the mantle 3 are A roughly conical head center 5 is fixed to the inner surface of the mantle 3.

In addition, dust contained in the external atmosphere may be removed from the crusher 1.
In order to prevent it from entering the inside of the crusher 1
A cylindrical dust collar 9 provided on the base of the
A dust seal ring 8 is provided between the head center 5 and a retainer 6 attached to the lower surface thereof.

As shown in FIG. 9, the dust seal ring 8 has its inner surface in contact with the dust collar 9,
It is formed in the shape of a conical plate with an angle α toward the outside.

As shown in FIG. 8, the eccentric rotational movement of the rotary crusher 1 moves the mantle 3, the head center on the outer surface of a cone with an apex O and an apex angle θ centered on the central axis a of the crusher 5. This is achieved by swinging the central axis b of the eccentric rotating section 7 including the retainer 6 and the like.

Then, Tellina 6 will eccentrically rotate around dust collar 9 as described above.
The outer shape (cone) of the dust seal ring 8 attached to the dust collar 9 and the locus of movement of the retainer 6 (spherical surface) are different, as shown in FIG. 9. For this reason, a gap c is provided below the head center 5 to absorb dimensional fluctuations caused by the eccentric rotation movement.

Therefore, in such a rotary crusher, the groove 1 formed between the head center 5 and the retainer 6
Since the dust seal ring 8 slides up and down inside the crusher 1, dust that causes wear may not enter the crusher 1, or the dust seal ring 8 may slide up and down inside the crusher 1.
Since the dust seal ring 8 does not come into full-surface contact with the retainer 6 but instead comes into point contact or line contact, the dust seal ring 8 is locally worn.

However, regarding the wear that occurs in this way, if the inner wear of the dust seal ring 8 is within the permissible range (0.5 to 2.0 m/m), a small amount of fine powder will enter through such a gap. 11 (see Fig. 7), it is possible to seal the invading dust as shown by the broken line A, and prevent the intruding dust from getting mixed into the lubricating oil, so it is easy to operate the crusher. It wasn't that much of a hindrance.

Problems with the Prior Art However, when the conventional rotary type crusher 1 is used to crush water-containing raw material ore, the water containing the fine powder flows into the mantle 3 as shown by the solid line arrow in Figure 7. → Head center 5 → Retainer 6
The fine powder is transmitted to the dust collar 9 in order, and finally the fine powder adheres to the dust collar 9 (broken line section B). Then, the fine powder adhering to the dust collar 9 gradually multiplies and dries, resulting in, for example, grinding (hardening).
do. The abrasive fine powder enters between the dust collar 9 and the dust seal ring 8, for example.

Then, the dust seal ring 8, which constitutes a part of the seal structure of the crusher 1, comes into contact with the adhering powder that has turned into a grindstone on its inside, or its rotation is stopped, and the dust seal ring 8, which constitutes a part of the seal structure of the crusher 1, comes into contact with the adhering powder that has turned into a grindstone, or its rotation is stopped, and the dust seal ring 8 is removed from the head center 5 within a relatively short time.
Also, the retainer 6 and the like cause abnormal wear that exceeds the above-mentioned allowable range. As a result, the sealing of the dust seal ring 8 is broken, and the bearings and other parts of the crusher 1 are seized or damaged due to a large amount of fine powder mixed into the rotating parts.

Purpose of the invention Therefore, the main purpose of this invention is to protect the dust seal ring from abnormal wear caused by fine powder contained in water transmitted from the upper crushing section, and to improve the sealing effect of the dust seal ring. It's about providing structure.

Structure of the invention In order to achieve the above object, the main means adopted by this invention is to eccentrically rotate a substantially truncated conical mantle within a substantially conical cylindrical concave, and rotate the supplied rough stone between the concave and the mantle. A rotary type crusher that crushes under pressure between a vertical cylindrical dust collar fixed to a body supporting a concave of the rotary type crusher and a head center to which the mantle is attached, In order to seal the gap between them, in the seal structure of a rotary crusher equipped with a dust seal ring, a draining means extending in the circumferential direction of the head center is provided between the outer periphery of the lower surface of the head center and the dust seal ring. This is something to be prepared for.

Effects of the invention According to this invention, the dust seal ring can be protected from abnormal wear, so the sealing effect of the dust seal ring can be enhanced.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

Embodiment FIG. 1 is a vertical sectional view of the main part around the lower part of the head center of a rotary crusher according to an embodiment of this invention, and FIG.
4 to 4 are longitudinal cross-sectional views of the same essential parts showing modifications of the seal structure according to the embodiment shown in FIG. 1, and FIGS. It is a longitudinal cross-sectional view of the main part.

Note that the following example is only one specific example of this invention, and the technical scope of this invention is not limited by this example. Further, the same reference numerals will be used to describe elements common to those described in FIG. 7.

In Figure 1, the seal structure of the rotary crusher S ₁
(hereinafter referred to as a seal structure) is provided with a draining plate 12 of an appropriate length that protrudes downward from the lower surface of the retainer 6 as an example of a draining means. The drain plate 12 is arranged at an appropriate position in the radial direction of the retainer 6 and extends in the circumferential direction to remove the dust collar 9.
It is set up to surround. In addition, as a material used for such a draining plate 12, for example, a band-shaped iron plate or a band-shaped rubber plate having a height of 20 mm or more is adopted.

Therefore, as shown in FIG. 1, when water containing fine powder from the upper crushing section passes through the mantle 3 and the head center 5 and reaches the retainer 6 as shown by the arrow, it is attached to the retainer 6. It is guided by the draining plate 12 and drips. As a result, the flow of water containing fine powder is interrupted before reaching the dust seal ring 8 and the dust collar 9.

Note that the flow of water containing fine powder blocked by the draining plate 12 is guided, for example, between the lower body arms 13 onto a lower chute or conveyor (not shown), and is sent to the next process together with the crushed product raw materials. It can be done.

2 to 4 show modified examples of the seal structure of the embodiment shown in FIG. 1. The seal structure _S2 shown in FIG. 2 differs from the seal structure _S1 shown in FIG. 1 in that a drain plate 22 is attached to the head center 5. According to this, the draining plate 22
serves as a flange on the peripheral edge of the head center 5, for example, and allows water containing fine powder to fall from the peripheral edge of the head center 5, and can be drained at a position as far away from the dust seal ring 8 and dust collar 9 as possible.

In the seal structure _S3 shown in FIG. 3, a hanging portion 6a is integrally formed in the retainer 6 as an example of a draining means. In this case, the longitudinal section of the retainer 6 has a substantially inverted L-shape, and the hanging portion 6a functions similarly to the draining plates 12, 22 (see FIGS. 1 and 2). Here, since the dust seal ring 8 is held by the retainer 6 and the water containing fine powder is drained, there is no need to attach a separate drain plate or the like.

The seal structure _S4 shown in FIG.
At an appropriate position in the radial direction of the head center 5,
A groove 14 extending in the circumferential direction and opening downward is formed. The depth of the groove 14 is set to, for example, 20 mm or more, and water containing fine powder is drained at the opening corner 14a of the groove 14. In this case, when machining the head center 5, the concave groove 1 is
4 can be formed.

Next, FIGS. 5 and 6 show another embodiment of the seal structure of this invention. In the seal structure _S5 shown in FIG. 5, the drain plate 1 attached to the retainer ₆ is different from the seal structure S1 shown in FIG.
The difference is that a scraper 15 is provided at the lower end of 2 as an example of a cleaner means. This scraper 15 is attached to the head center 5 so as to be oriented in the radial direction, and is mainly carried by water from the upper crushing section and piled up on the lower fuselage arm 13 as adherent powder, for example,
This is for scraping off the solidified fine powder as shown by the chain double-dashed line C in FIG. This prevents the adhered powder from gradually growing and entering between the dust seal ring 8 and the dust collar 9 and stopping the rotation of the dust seal ring 8, and further prevents the dust seal caused by the head center 5 and the retainer 6. Wear of the ring 8 is prevented.

In the seal structure S ₆ shown in FIG. 6, a scraper 16 is attached to the drain plate 22 of the seal structure S ₂ shown in FIG.
is installed. Here, the water drained by the drain plate 22 is mainly dropped onto the arm liner 13a of the lower fuselage arm 13.
The fine powder contained in the water dropped onto the arm liner 13a is deposited as adhering powder, as shown by the two-dot chain line D in FIG. scraper 1
Reference numeral 6 is for scraping off the adhering powder that builds up and grows on the arm liner 13a.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the main part around the lower part of the head center of a rotary crusher according to an embodiment of this invention;
4 to 4 are longitudinal sectional views of the same essential parts showing modifications of the embodiment seal structure in FIG. 1, and FIGS. 5 and 6 are respectively showing the same essential parts showing other embodiment seal structures of this invention. 7 is a vertical sectional view of the main part of the rotary crusher which is the background of this invention, FIG. 8 is an explanatory diagram of the eccentric rotation motion of the rotary crusher, and FIG. 9 is a diagram of the conventional rotary crusher. FIG. 2 is a vertical cross-sectional view of a main part showing a seal structure of a dynamic crusher. Explanation of symbols, S ₁ to S ₆ ... Seal structure, 12, 2
2...Draining plate, 1...Rotating type crusher, 2...Concave, 3...Mantle, 5...Head center, 6...Retainer, 8...Dust seal ring, 9...Dust collar.

Claims (1)

[Claims for Utility Model Registration] 1. Rotating type crushing in which a substantially truncated conical mantle is eccentrically rotated within a substantially conical cylindrical concave, and the supplied raw ore is compressed and crushed between the concave and the mantle. a vertical cylindrical dust collar fixed to a fuselage supporting a concave of the rotary crusher;
In a seal structure of a rotary crusher equipped with a dust seal ring between the head center to which the mantle is attached and a dust seal ring to seal the gap between the head center and the head center, from the outer peripheral edge of the lower surface of the head center to the dust seal ring. , a seal structure for a rotary crusher comprising a draining means extending in the circumferential direction of the head center. 2. A seal structure for a rotary crusher according to claim 1, wherein the draining means has an uneven shape including a stepped portion. 3. The seal structure for a rotary crusher according to claim 2, wherein the stepped portion is a flange member. 4. The seal structure for a rotary crusher according to claim 2, wherein the stepped portion is a concave portion opening downward. 5. Utility model registration claims 1 to 4, comprising a cleaner means attached to the stepped portion so as to be oriented in the radial direction of the head center in order to scrape off adhering powder adhering to the vicinity of the lower part. The seal structure of the rotary crusher according to any one of the above.