JP2003284963A - Dustproof mechanism of gyratory crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably prevent entrance of dust into a lubricating oil holding portion and leakage of a lubricating oil from the lubricating oil holding portion to the outside. <P>SOLUTION: A circular dustproof wall 10 surrounding an oil storage chamber 9 for storing the lubricating oil is attached to a casing 5, and in a circular space 12 formed between the dustproof wall 10 and a downward flange portion 11a of a dustproof ring 11 attached to the periphery of the bottom of a mantle core 3, air for air purge is blown from a circular air header 13 attached to the periphery of the dustproof wall 10, whereby the circular space 12 around the dustproof wall 10 is kept in a clean state of a reduced level of dust to prevent entrance of dust into the oil storage chamber 9, and leakage of the lubricating oil from the oil storage chamber 9 to the outside is prevented by air blown from the outside of the dustproof wall 10. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof mechanism for preventing dust from entering a lubricating oil holding portion for rotating rotation of a rotary crusher.

[0002]

2. Description of the Related Art A rotary crusher rotates a vertically oriented main shaft equipped with a mantle gear so as to be eccentric and tilted (rotationally rotated) to form a mantle with a substantially truncated cone shape fitted on the mantle gear. The object to be crushed is crushed between the liner fixed to the casing on the outer peripheral side thereof. As a means for supporting the rotating and rotating main shaft, a method of receiving the main shaft itself or the bottom of the mantle door with a spherical seat is adopted.

In this type of rotary crusher, a dustproof mechanism is provided so that dust generated during crushing does not enter the lubricating oil holding portion for rotating rotation. For example, as shown in FIG. 8, the dustproof mechanism of a rotary crusher disclosed in Japanese Patent Laid-Open No. 61-171548 is located in a space formed between a main shaft 51 and a recess 52a at the bottom of a mantle door 52. An annular dust-proof wall surrounding the oil chamber 53 of the lubricating oil for rotative rotation is formed by the inner partition plate 55a and the outer partition plate 55b fixed to the casing 54, and both partition plates 55a,
The pressurized air supply passage 57 is provided in the air chamber 56 formed between 55b.
By supplying air from the inner partition plate 55a and ejecting air from the plurality of holes 58 provided in the inner partition plate 55a and the slits 59 between the partition plates 55a and 55b, a gap 60 between the recess 52a and the outer partition plate 55b is obtained. The dust is prevented from entering the oil chamber 53.

Further, as shown in FIG. 9, the dustproof mechanism of the rotary type crusher disclosed in Japanese Patent Laid-Open No. 4-305257 has a spherical portion 52 at the bottom of a mantear 52 around a main shaft 51, as shown in FIG.
An inner / outer vertical plate 63 is fixed to the casing 54 via a ring-shaped disc 62 on the outer peripheral side of a spherical seat 61 that supports b and partitions the oil chamber 53 of the lubricating oil. The flexible ring 64 is slidably contacted with the dustproof ring 65 attached to the outer peripheral portion of the bottom of the mantle cover 52 to form an annular dustproof wall surrounding the oil reservoir chamber 66 in which the lubricating oil leaking from the oil chamber 53 is accumulated. Air is supplied to the air chamber 67 formed by the inner and outer vertical plates 63, the flexible ring 64, and the dustproof ring 65 so that the air is ejected from the sliding contact portion between the flexible ring 64 and the dustproof ring 65 to the inside and outside. ing. The dustproof mechanism is intended not only to prevent dust from entering the oil reservoir chamber 66, but also to prevent leakage of lubricating oil from the oil reservoir chamber 66.

[0005]

In the dustproof mechanism of the rotary crusher shown in FIG. 8, the lubricating oil in the oil chamber 55 is rotated from the outer peripheral surface of the main shaft 51 to the bottom of the mantle cover 52 by the centrifugal force. Of the outer partition plate 5 and the recess 52a.
5b reaches the gap 60, and this lubricating oil enters the slit 5
There is a possibility that the air blown out from 9 may flow out. The outflow of the lubricating oil is not only a loss of the lubricating oil but also a problem of adhering to a crushed product as a product. Further, since the size of the gap 60 is changed by the rotational rotation of the main shaft 51, when the gap 60 is widened, the purging force of the air jetted from the slit 59 is weakened and the dust enters the oil chamber 53. There is also the problem of becoming easier.

On the other hand, the dustproof mechanism shown in FIG.
Although 6 is covered with a dustproof wall without any gap, when an unbalanced load acts on the mantle (not shown), a gap is created between the dustproof ring 65 and the flexible ring 64. Therefore, there is a problem that the lubricating oil in the oil reservoir chamber 66 partially enters the air chamber 67 when this gap is created, and the invading lubricating oil flows out together with the air ejected from the air chamber 67. . Air chamber 67
Although the outflow of the lubricating oil can be prevented by reducing the amount of air blown out from the above, dust easily enters the oil reservoir chamber 66. Further, when a gap is created, dust may enter the air chamber 67, and the dust that has entered may accumulate and block the air supply port to the air chamber 67.

Therefore, an object of the present invention is to reliably prevent the intrusion of dust into the lubricating oil holding portion and the outflow of the lubricating oil from the lubricating oil holding portion to the outside.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a mantle having a substantially truncated cone shape, which is rotated by rotating a vertically oriented main shaft fitted with a mantle, and which is fitted onto the mantle. , In a rotary crusher for crushing the object to be crushed with a bawl liner fixed to the casing on the outer peripheral side thereof, in order to prevent dust from entering the lubricating oil holding portion for the rotative rotation, In a dustproof mechanism of a rotary crusher provided with a dustproof wall surrounding the lubricating oil holding part and an air purge means around the lubricating oil holding part, the outer peripheral side of the dustproof wall is partitioned by a partition member, The air purging air is ejected in an annular space formed between the member and the dustproof wall.

That is, the outer peripheral side of the dust-proof wall is partitioned by a partition member, and an annular space formed between the partition member and the dust-proof wall is blown with air for air purging to thereby create an annular space around the dust-proof wall. Keeping a clean state with little dust prevents dust from entering the lubricating oil holding part inside the dust-proof wall, and at the same time, air jetted from the outside of the dust-proof wall prevents the lubricating oil from going out from the lubricating oil holding part to the outside. I tried to prevent the outflow.

By attaching the partition member to a fixed portion that does not rotate and rotate, the size of the radial gap of the annular space is kept constant regardless of the rotation and rotation, and the purging force of the air purging air is stabilized. Can be secured.

By opening the annular space formed between the partition member and the dustproof wall on the lower side, dust that slightly enters the annular space is dropped downward, and air is blown for air purging due to accumulation of dust. It is possible to prevent blockage of the outlet.

The air for air purging is jetted in the swirling direction in the annular space to form an air curtain by the swirling air flow in the annular space, and the inner periphery of the annular space on the dust-proof wall side is clean with less dust. Can be kept in a state. Further, the air ejection port is made vertically long to narrow the radial gap of the annular space, and a large air purging force can be obtained with a small air ejection amount.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. 1 and 2 show the first
It is an embodiment of. FIG. 1 shows a rotary crusher incorporating the dustproof mechanism of this embodiment. This rotary crusher
A main shaft 2 which is eccentrically and slantly fitted into a sleeve 1 which is rotationally driven about a vertical axis is rotatably rotated, and a mantle 4 having a substantially truncated cone shape is externally fitted to the main shaft 2 through a mantle cover 3. The object to be crushed is crushed between the outer peripheral side and the bawl liner 6 fixed to the casing 5. The mantle door 3 that rotates and rotates with the main shaft 2 has a spherical surface portion 3a formed on the bottom thereof, which is a spherical seat 7 fixed to the casing 5.
The oil chamber 8 of the lubricating oil for rotative rotation is partitioned by the spherical seat 7. The dustproof mechanism is provided on the outer periphery of the spherical seat 7.

FIG. 2 is an enlarged view of the portion of the dustproof mechanism. On the outer peripheral side of the spherical seat 7, an annular dustproof wall 10 surrounding an oil reservoir 9 for accumulating the lubricating oil leaking from the oil chamber 8 is attached to the casing 5, and a dustproof ring 11 is provided on the outer peripheral portion of the bottom of the mantle door 3. It is installed. A downward flange portion 11a as a partition member that forms an annular space 12 with the dustproof wall 10 is provided on the outer peripheral edge of the dustproof ring 11, and air for air purging is ejected into the annular space 12 through a jet port 13a.
An annular air header 13 ejected from is attached to the outer periphery of the dustproof wall 10. An annular seal rubber 14 is attached to the top of the dust-proof wall 10 so as to be in sliding contact with the inclined ring portion 11b provided on the inner peripheral portion of the dust-proof ring 11.

The mantle door 3 tilts in the direction shown by the arrow in FIG. 2 as the main shaft 2 rotates. At this time, if an unbalanced load is applied, a gap may be formed between the inclined ring portion 11b of the dustproof ring 11 and the seal rubber 14, but the annular space 12 is clean with less dust due to the air ejected from the air header 13. Since this state is maintained, dust hardly enters the oil reservoir 9 through this gap. The air from the jet port 13a of the air header 13 is
Since it is also sprayed on the sliding contact portion between the inclined ring portion 11b and the seal rubber 14, the lubricating oil in the oil reservoir 9 does not leak to the outside through the gap. Further, since the annular space 12 partitioned by the flange portion 11a of the dust-proof ring 11 is open at the lower side, there is no concern that dust that slightly enters will accumulate in the annular space 12 and block the ejection port 13a. .

On the outer peripheral side of the spherical seat 7, an annular oil fence 15 which is in sliding contact with the spherical part 3a of the mantle door 3 is attached, and between the oil chamber 8 and the spherical part 3a. The lubricating oil that is transmitted and leaks is dropped into the oil reservoir 9. The lubricating oil leaking from the oil chamber 8 is
It also falls into the oil reservoir 9 from the slot 16 provided in the spherical seat 7.

FIG. 3 shows a second embodiment. This dustproof mechanism has the same basic structure as that of the first embodiment, and is different only in that a ring plate 17 is attached to the outer peripheral side of the air header 13 as a second partition member. In this embodiment, since the size of the radial gap of the inner annular space 12a partitioned by the ring plate 17 does not change with the rotational rotation, the purging force of the air ejected from the ejection port 13a of the air header 13 is stabilized. Can be secured.

Further, since the ring plate 17 is curved in the vertical direction and the distance between the ring plate 17 and the dustproof wall 10 is narrowed at the upper and lower ends thereof, the flow velocity of the air flowing out from the inner annular space 12a is increased, and the dust particles are collected. Invasion into the oil sump chamber 9 can be prevented more reliably. Since the inner annular space 12a is also open at the lower side, there is no risk that dust that slightly enters will accumulate in the inner annular space 12a.

FIG. 4 shows a third embodiment. This dustproof mechanism also has the same basic configuration as that of the first embodiment, and the air header 13 is a vertically long annular pipe, and its jet outlet 13a is provided on the inner peripheral side, and the dustproof wall 10 The difference is that the seal rubber 14 on the top of the is omitted. In this embodiment, the vertically long air header 13 also serves as a second partition member that partitions the inner annular space 12a.

5A and 5B show a fourth embodiment. In this dustproof mechanism, a vertically long ring plate 17 as a second partition member is attached to the outer peripheral side of the dustproof wall 10, and a vertically long jet port 13a is swung in an inner annular space 12a partitioned by the ring plate 17 in the turning direction. The facing air header 13 is inserted from below. Other parts are the same as those in the first embodiment.

The ring plate 17 is bent inwardly at its upper and lower sides, and the lengthwise ejection port 13a is slightly smaller in height than the ring plate 17, and its upper end is slightly lower than the upper end of the ring plate 17. It is located in. The air ejected from the ejection port 13a is directed slightly obliquely upward.

In this embodiment, an air curtain of a swirling air flow is formed in the inner annular space 12a by the air ejected from the ejection port 13a, and the inner circumference of the dustproof wall 10 is kept clean with less dust. Be drunk In addition, the spout 13a
Is flat, the gap in the radial direction of the inner annular space 12a can be narrowed, and a large air purge force can be obtained with a small air ejection amount.

Further, since the upper end of the ring plate 17 is close to the dust-proof ring 11, air is less likely to flow out on the upper end side of the ring plate 17 than on the lower end side. Then, the air ejected from the ejection port 13a is directed slightly obliquely upward to generate a swirling air flow over the entire circumference of the inner annular space 12a by ejecting the air from one ejection port 13a. The installation space is small.

FIG. 6 shows a modification of the fourth embodiment.
The seal rubber 14 on the top of the dustproof wall 10 is omitted.

FIG. 7 shows a fifth embodiment. In this embodiment, the oil chamber 8 of the lubricating oil for rotative rotation is surrounded by an annular dustproof wall 10 fixed to the casing 5, and on the outer peripheral side of this dustproof wall 10 is a vertically long partition member. A ring plate 17 is attached, and an air header 13 having a vertically long jet outlet 13a oriented in the swirling direction is inserted from below into an inner annular space 12a partitioned by the ring plate 17.

In this embodiment, the dustproof ring 11 is provided with an inwardly directed annular groove 11c, and the seal ring 18 slidably fitted in the annular groove 11c is slidably contacted with the outer surface of the dustproof wall 10. When an unbalanced load is applied, a gap may be created in this sliding contact portion, but since the inner annular space 12a is kept in a clean state by the swirling airflow from the air header 13, dust may enter from this gap. There is no.

[0027]

As described above, in the dustproof mechanism of the rotary crusher according to the present invention, the outer peripheral side of the annular dustproof wall surrounding the lubricating oil holding portion is partitioned by the partitioning member, and the partitioning member and the dustproof wall. Since the air for air purging is jetted in the annular space formed between the and, the annular space around the dust-proof wall is kept in a clean state with little dust, and the oil is retained inside the dust-proof wall. The dust can be prevented from entering, and the air ejected from the outside of the dust-proof wall can prevent the lubricating oil from flowing out from the lubricating oil holding portion.

Further, by mounting the partition member on a fixed portion which does not rotate and rotate, the size of the radial gap of the annular space is kept constant irrespective of the rotation and rotation, and the purging force of the air purging air is stabilized. Can be secured.

Further, the air for air purging is jetted in the swirling direction in the annular space to form an air curtain by the swirling air flow in the annular space, and the inner circumference of the annular space on the dust-proof wall side has less dust. It is possible to maintain a clean state, and to narrow the radial gap of the annular space by making the air ejection port flat and long so that a large air purge force can be obtained with a small air ejection amount.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a rotary crusher incorporating a dustproof mechanism according to a first embodiment.

FIG. 2 is an enlarged vertical sectional view of the dustproof mechanism portion of FIG.

FIG. 3 is a vertical sectional view showing a dustproof mechanism according to a second embodiment.

FIG. 4 is a vertical sectional view showing a dustproof mechanism of a third embodiment.

5A is a vertical cross-sectional view showing the dustproof mechanism of the fourth embodiment, and b is a cross-sectional view taken along line VV of a.

FIG. 6 is a vertical cross-sectional view showing a modification of the fourth embodiment.

FIG. 7 is a vertical sectional view showing a dustproof mechanism of a fifth embodiment.

FIG. 8 is a vertical sectional view showing a dust-proof mechanism of a conventional rotary crusher.

FIG. 9 is a vertical sectional view showing a dustproof mechanism of another conventional rotary crusher.

[Explanation of symbols]

1 sleeve 2 spindles 3 mantria 4 mantle 5 casing 6 Bawl liners 7 Spherical seat 8 oil chamber 9 oil reservoir 10 dust barrier 11 Dust-proof ring 11a Flange part 11b Inclined ring part 11c annular groove 12, 12a Annular space 13 air header 13a spout 14 Seal rubber 15 Oil fence 16 slots 17 ring board 18 seal ring

Claims (4)

[Claims] 1. A crushing is performed between a mantle having a substantially truncated cone shape externally fitted to a mantle and a bawl liner fixed to a casing on the outer peripheral side of the mantle by rotating a vertically oriented main shaft equipped with the mantle. In a rotary crusher for crushing objects, in order to prevent dust from entering the lubricating oil holding portion for the above-described rotation, a dust-proof wall surrounding the lubricating oil holding portion and a lubricating oil holding portion. In a dustproof mechanism of a rotary crusher provided with an air purging means around, the outer peripheral side of the dustproof wall is partitioned by a partition member, and the air purge is performed in an annular space formed between the partition member and the dustproof wall. A dust-proof mechanism for a rotary crusher, which is characterized in that it blows out air for use. 2. The dustproof mechanism for a rotary crusher according to claim 1, wherein the partition member is attached to a fixed portion that does not rotate and rotate. 3. The dustproof mechanism for a rotary crusher according to claim 1, wherein an annular space formed between the partition member and the dustproof wall is opened downward. 4. The dustproof mechanism for a rotary crusher according to claim 1, wherein the air for air purging is jetted in the turning direction in the annular space.