JP2005224745A - Shaft bearing structure of rotary shaft of crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft bearing structure of a rotary shaft of a crusher with which invasion of dust into a junction part can be suppressed and damage to a shaft bearing part due to invaded dust, or the like, can be prevented beforehand. <P>SOLUTION: In the shaft bearing structure of the rotary shaft 5A of the crusher in which an axial center of a rotor 5, at a surface of which a crushing blade 5a is attached, is supported by freely rotating in a horizontal posture and a charged object to be crushed is crushed, an end part of the rotor 5 is inserted into a tubular frame 30, further the rotary shaft 5A of the rotor 5 is supported by a bearing 36 provided at a bearing housing 35 and a space S having a gap S2 being larger than a gap S1 that is formed by an end part peripheral surface of the rotor 5 and the tubular frame 30 arranged by facing it, is formed between an end face of the rotor 5 and an end face of the tubular frame 30 or the bearing housing 35. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bearing structure for a rotating shaft of a crusher that supports a shaft center of a rotor having a crushing blade attached to a surface thereof in a horizontal posture so as to be rotatable and crushes an object to be crushed.

  As shown in FIG. 5, the conventional shaft structure of the rotating shaft of the crusher is such that the rotating shaft 5 </ b> A of the rotor 5 is rotatably supported by a bearing 36 and is configured to have the same diameter as the central peripheral surface. The labyrinth structure 30 a formed on the outer surface of the end portion of the rotor and the inner surface of the cylindrical frame 30, the rotor 5 is rotatably fixed to the cylindrical frame 30, and the labyrinth groove formed on the outer peripheral portion of the end surface of the rotor 5 A convex portion 35 b formed on the bearing housing 35 is rotatably fitted in 5 b, and the bearing housing 35 is bolted to the cylindrical frame 30.

In addition, as an inertia cone crusher that suppresses the temperature rise of the lubricating oil and prevents dust from entering through the gap between the annular seal and the cone head, a crusher shell, a cone cave attached to the crusher shell, and the crusher A spherical support provided inside the shell, a conical head mounted on the spherical support and having a main shaft attached to the lower portion thereof, a bearing sleeve loosely fitted to the main shaft and having an unbalanced weight, and the bearing In an inertia cone crusher comprising a drive mechanism for rotationally driving a sleeve and an annular seal provided between the spherical support and the cone head, cooling is provided on the outer wall of the crusher shell and inside the crusher shell. There has been proposed a structure in which an air inlet for supplying air is provided and an air inlet is connected to the air inlet.
Japanese Utility Model Publication No. 7-9437

  According to the bearing structure of the rotating shaft of the conventional crusher shown in FIG. 5, dust having a small particle diameter of several millimeters or less generated by crushing the object to be processed from the gap between the rotor 5 and the cylindrical frame 30. Invading and causing significant wear and temperature rise in the joint including the labyrinth structure, dust eventually penetrates deeply while wearing the joint between the rotor 5 and the bearing housing 35, and finally reaches the bearing from the oil seal 35A. As a result, the bearing 36 may be damaged. Therefore, it is conceivable to inject oil for sealing such as grease into the gap for the purpose of suppressing the invasion and progress of dust into the joint. There was a problem that there was.

  An object of the present invention is to provide a bearing structure for a rotary shaft of a crusher that suppresses the intrusion of dust into a joint and prevents damage to the bearing due to the intruded dust and the like in view of the above-described conventional drawbacks. In the point.

  In order to achieve the above-mentioned object, the first characteristic configuration of the bearing structure of the rotating shaft of the crusher according to the present invention is that the crushing blade is attached to the surface as described in claim 1 of the claims. It is a bearing structure of a rotating shaft of a crusher that supports the rotor shaft center in a horizontal posture so as to be rotatable, and crushes the material to be crushed, and the end of the rotor is fitted into a cylindrical frame, The cylinder in which the rotating shaft of the rotor is supported by a bearing provided in a bearing housing, and is disposed opposite to the end peripheral surface of the rotor between the end face of the rotor and the end face of the cylindrical frame or the bearing housing. This is that a space having a gap larger than the gap formed with the frame is formed.

  According to the above-described configuration, dust that has entered from a gap formed between the peripheral surface of the end portion of the rotor and the frame that is arranged to face the gap is between the end surface of the rotor and the end surface of the cylindrical frame or the bearing housing. Even if it reaches a space having a gap wider than the gap to be formed, it will fall into the space without reaching the bearing ahead, so damage to the bearing portion can be prevented in advance. It will be possible.

  In the second feature configuration, as described in claim 2, in addition to the first feature configuration described above, an opening that communicates with the space is formed in a lower portion of the cylindrical frame or the bearing case. In the point.

  According to the above-described configuration, the dust that has entered and dropped into the space is dropped and discharged to the outside from the opening formed in the lower part of the cylindrical frame or bearing housing that partitions the space, so that the dust is accumulated in the space. Therefore, it is possible to prevent a new problem that the oil seal or the bearing is damaged by the dust accumulated in the space.

  In the third feature configuration, as described in claim 3, in addition to the first or second feature configuration described above, a blade that rotates on the end surface of the rotor in the space as the rotor rotates is provided. Is in the point provided.

  According to the above-described configuration, the dust that has entered the space is forcibly agitated and scraped downward by the blade that rotates as the rotor rotates, so that damage to the bearing portion is reliably prevented. Become.

  In the fourth feature configuration, in addition to any of the first to third feature configurations described above, the fourth feature configuration is fitted into the cylindrical frame and faces the cylindrical frame. The end peripheral surface of the rotor is formed to have a larger diameter than the central peripheral surface of the rotor.

  Dust with a small particle size generated by crushing the workpiece moves to the end side along the rotor surface and eventually enters through the gap between the rotor and the cylindrical frame. Since the end peripheral surface of the opposing rotor is formed to have a larger diameter than the central peripheral surface of the rotor, the gap between the rotor and the cylindrical frame is formed at a position away from the central peripheral surface of the rotor radially outward. As a result, the dust moving along the rotor surface is prevented from entering the gap as it is. Therefore, the amount of dust entering from the gap between the rotor and the cylindrical frame can be greatly reduced, and the probability of failure can be greatly reduced accordingly.

  In the fifth feature configuration, in addition to any one of the second to third feature configurations described above, the object to be crushed by the crushing blade below the rotor. Is provided through a discharge screen, and a collection chute is provided for guiding foreign matter that has entered the space from the opening to the collection unit.

  According to the above-described configuration, foreign matter such as dust entering the space and discharged from the opening is collected by the collection unit via the guide chute. Therefore, a dust collection tool may be separately provided, or the collection tool This eliminates the need for maintenance work such as cleaning.

  In the sixth feature configuration, in addition to any one of the third to fourth feature configurations described above, the axis of the rotor having a crushing blade attached to the surface is in a horizontal posture. A rotating shaft bearing structure of a crusher that supports the rotation and crushes the object to be crushed, the end of the rotor being fitted into a cylindrical frame, and the rotating shaft of the rotor is a bearing housing A space having a gap larger than a gap formed between the end surface of the rotor and the end surface of the cylindrical frame and the frame arranged opposite to the end surface of the rotor is supported by a bearing provided on the rotor. The bearing housing is supported by a bracket formed on the cylindrical frame so as to extend in a direction opposite to the rotor, and the space is inspected on an end surface of the cylindrical frame. Lies in that openable and closable access port because is provided.

  According to the above-described configuration, the bearing housing is supported by the bracket attached so as to extend to the cylindrical frame, and the bearing housing is not directly supported by the cylindrical frame. Part is exposed. Therefore, by providing an inspection port in the exposed part of the end face of this cylindrical frame, cleaning of dust that has entered the space and replacement of parts that form a gap between the peripheral face of the end part of the rotor and the above-mentioned frame Maintenance such as cleaning and cleaning can be easily performed.

  As described above, according to the present invention, it is possible to provide a bearing structure for a rotating shaft of a crusher that can prevent dust from entering a joint and prevent damage to the bearing due to dust that has entered. I can do it now.

  Embodiments of a bearing structure for a rotating shaft of a crusher according to the present invention will be described below. As shown in FIGS. 2A to 2C, the uniaxial shear crusher includes a hopper 1 into which a material to be crushed is charged, a crushing processing unit A that crushes the material to be crushed into the hopper 1, Pressing the object to be crushed from above toward the crushing part A toward the crushing part A on the front side wall of the hopper 1 and the pusher pusher 3 as the first pressing mechanism B that presses the object to be crushed toward the crushing part A from the horizontal direction. The presser pusher 3 serves as a second pressing mechanism C for preventing the object to be crushed from being lifted when the object to be crushed is pushed by the push pusher 3.

  In the pusher pusher 3, pressure oil from a hydraulic pump (not shown) is sent to the first hydraulic cylinder 13, and the piston 13a of the first hydraulic cylinder 13 is connected to the rear end of the pusher pusher 3 via the connecting arm 13b. Therefore, it is provided on the base plate 4 so as to be slidable and movable back and forth, and is guided by the guide member 3a provided on the side wall of the main body frame 2 so as not to be lifted by the reaction force from the waste when pushed. The

  The crushing part A is installed between one end of the base plate 4 and the side wall of the main body frame 2, and has a rotor 5 attached with a plurality of rotary blades 5 a and an axial center in a horizontal posture. It is composed of a first crushing fixed blade 6 provided at the end of the base plate 4 with a symmetric position as a center, and a second crushing fixed blade 7 provided on the opposite side. As will be described later, the rotor 5 is rotatably supported at both end portions by a bearing portion, and is connected to a rotating shaft extending to one end portion side of the bearing portion via a coupler. A pulley attached to an output shaft from the motor 11 is connected by a belt.

  A discharge screen 8 having a large number of small holes is provided below the rotor 5, and the crushed material dropped from the discharge screen 8 to the collection unit 10 is discharged and conveyed in the horizontal direction by the screw conveyor 9.

  As shown in FIG. 2B, the rotor 5 is provided with a large number of V-shaped grooves 5v on the outer periphery thereof in parallel with each other at a predetermined pitch, and a plurality of rotary blades 5a are mounted in the V-shaped grooves 5v. 5c is provided. The rotary blades 5a are respectively arranged in a zigzag shape when the vertices of the adjacent V-shaped grooves 5v are connected to each other.

  As shown in FIGS. 2A and 2C, the presser device (second press portion) 14 is rotatably mounted via a guide 15 on the side wall of the hopper 1, and has an arcuate drop-off surface 16 and a presser. It is composed of a ¼ arc drum having a surface 18, is fixed to the center shaft 17 at the center position of the arc, and the end of the center shaft 17 protruding to the hopper side is rotatably supported. A protective cover 21 is attached to the mounting frame extending between the upper and lower mounting frames 22, 23 outside the hopper 1, so that when the arc drum is rotated and moved from the front end wall of the hopper 1 to the hopper 1 in and out. Safety is ensured. Furthermore, a scraper 20 for preventing small pieces of crushed material from scattering from the upper and lower gaps to the opening formed in the front end wall of the hopper 1 that allows rotational movement of the presser device 14 in and out. , 20 are attached.

  A rotary drive arm 24 is connected to the shaft end where both ends of the central shaft 17 protrude from the hopper side wall, and a piston 25 connected to the arm 24 and a second mounting base 27 attached to the mounting base 27 fixed to the hopper side wall. The arm 24 is rotationally driven by a hydraulic mechanism including a hydraulic cylinder 26.

  Below, the bearing structure of the rotating shaft of the rotor 5 will be described in detail. As shown in FIG. 1, the end of the rotor 5 is fitted into a cylindrical frame 30, and the rotating shaft 5A of the rotor 5 is supported by a bearing 36 inserted in the bearing housing 35, and the rotating shaft 5A is large. It is sealed by an oil seal 35A that comes into contact with the sleeve 5C fitted into the diameter portion.

  A space S having a gap S2 larger than a gap S1 formed between the end surface 5B of the rotor 5 and the bearing housing 35 and the cylindrical frame 30 disposed opposite to the peripheral surface of the end of the rotor 5 is formed. Thus, even if the dust that has entered from the gap S1 reaches the space S formed between the end surface 5B and the bearing housing 35, the dust falls in the space S without reaching the bearing 36 from there. Therefore, the bearing portion can be prevented from being damaged.

  On the outer periphery of the end portion of the rotor 5, the outer peripheral surface of the end portion side is chamfered, and a hard metal ring 51 having a substantially triangular shape in cross-section is fitted and fixed, and the outer peripheral surface of the end portion of the rotor 5 is the central portion of the rotor 5. It is formed so as to have a larger diameter than the peripheral surface, and is configured to prevent direct intrusion into the gap S <b> 1 into the dust moving along the surface of the rotor 5 by the stepped portion.

  Similarly, a hard metal ring 31 is fitted and fixed to the mounting seat 32 on the inner peripheral portion of the cylindrical frame 30 that forms the gap S1 facing the metal ring 51, thereby reducing wear caused by dust entering the gap S1. It is configured as follows. When the metal ring 51 is worn, the metal ring 31 can be replaced by removing the bearing housing 35 from the cylindrical frame 30 and removing the mounting seat 32 from the cylindrical frame 30. Here, the reason why the metal ring 51 fitted to the end of the rotor 5 is chamfered is to facilitate the replacement work of the metal ring 31 described above, as well as weight reduction and cost reduction of parts. This is for shortening the wear area with the dust that has entered the gap S1 to reduce heat generation, and chamfering is not necessarily essential.

  A blade 34 that rotates in the space S as the rotor 5 rotates is provided on the end surface 5B of the rotor 5, and an opening 33 that communicates with the space S is formed in the lower part of the cylindrical frame 30. A guide chute 10A that guides foreign matter such as dust from the opening 33 to the collecting unit 10 is provided, so that the dust that has entered the space S is forcibly scraped downward by the blade 34, and the outside from the opening 33 It is configured to be discharged. Here, the opening 33 may be formed in the lower part of the space S. When the bearing housing 35 extends to the lower part of the space S, the opening 33 communicating with the space S is formed in the lower part of the bearing housing 35. May be formed. In FIG. 1, reference numeral 8 a denotes a mounting bracket for the discharge screen 8.

  Another embodiment of the present invention will be described below. In the above-described embodiment, the outer peripheral surface of the end portion of the rotor 5 is described as having a larger diameter than the peripheral surface of the central portion of the rotor 5, but the configuration is a preferred embodiment, but is essential to the present invention. Instead, even if the outer peripheral surface of the end portion of the rotor 5 is configured to have the same diameter as the peripheral surface of the central portion of the rotor 5, it is possible to effectively suppress the influence on the bearing 36 due to dust or the like entering the space S. Is.

  In the above-described embodiment, the case where the space S is formed between the end surface 5B of the rotor 5 and the bearing housing 35 has been described. However, as shown in FIG. The end surface 5B and the end surface of the cylindrical frame 30 may be configured to form a space S.

  In the above-described embodiment, the bearing housing 35 is attached to the cylindrical frame 30 so that the end of the rotor 5 is covered. However, the structure and attachment mechanism of the bearing housing 35 are limited to this. Instead, as shown in FIG. 3, a planima block type bearing unit in which a bearing housing 35 is supported on a bracket 37 attached to a cylindrical frame 30 so as to extend in a direction opposite to the rotor 5 is provided. It may be used.

  In this case, the end of the rotor 5 is fitted into the cylindrical frame 30, and the rotating shaft 5 </ b> A of the rotor 5 is supported by the bearing 36 provided in the bearing housing 35, and the end surface of the rotor 5 and the end surface of the cylindrical frame 30 are In the same manner as described above, a space S having a gap S2 larger than the gap S1 formed between the circumferential surface of the end portion of the rotor 5 and the cylindrical frame 30 disposed to face the rotor 5 is formed. Even if the invading dust reaches the space S having a gap larger than the gap S2 formed between the end face of the rotor 5 and the end face of the cylindrical frame 30, it does not reach the bearing 36 from there. Since the space S falls, the bearing portion can be prevented from being damaged.

  Then, the end peripheral surface of the rotor 5 that is fitted into the cylindrical frame 30 and faces the cylindrical frame 30 is formed with a larger diameter than the central peripheral surface of the rotor 5. An opening 33 that communicates with the space S is formed, and the end surface of the rotor 5 is provided with a blade 34 that rotates in the space S as the rotor 5 rotates, and foreign matter such as dust that has entered the space S is removed. The point that the guide chute 10A for guiding the collection unit 10 from the opening 33 is provided is the same.

  According to such a structure, a part of the end face of the cylindrical frame 30 is exposed, and the exposed opening 39 is provided with an openable / closable inspection port 39 to clean the dust that has entered the space S and the end of the rotor 5. Maintenance such as replacement and cleaning of the metal ring that forms the gap S1 formed between the circumferential surface of the part and the cylindrical frame 30 that is disposed to be opposed can be easily performed.

  Further, the bracket 37 is formed with an opening 38 for dropping dust or the like that has entered the space S3 formed between the end face of the cylindrical frame 30 and the bearing housing 35, and the dust accumulated in the space S3 is retained in the bearing. This prevents a situation in which it breaks into 36 and causes damage.

  In the above-described embodiment, the bearing structure of the rotating shaft has been described by taking the uniaxial shear crusher as an example. However, the crusher in which the bearing structure of the rotating shaft according to the present invention is not limited to this, and the surface is crushed. Needless to say, the present invention can also be applied to a multi-axis crusher such as a biaxial or a 4-axis as long as it is a crusher that rotatably supports the axis of the rotor to which the blade is attached.

(A) is sectional drawing which shows the bearing structure of the rotating shaft of a crusher, (b) is a side view of the rotor with which the blade was attached. (A) is sectional drawing of a uniaxial shear crusher, (b) is a perspective view of a crushing part, (c) is a perspective view of a hopper and a press part. Another embodiment is shown, (a) is sectional drawing which shows the bearing structure of the rotating shaft of a crusher, (b) is a front view of a bearing unit. Sectional drawing which shows the bearing structure of the rotating shaft of the crusher which shows another embodiment Sectional drawing which shows the bearing structure of the rotating shaft of the crusher which shows a prior art example

Explanation of symbols

5: Rotor 5a: Crushing blade 5A: Rotating shaft 10A: Guide chute 30: Cylindrical frame 34: Blade 35: Bearing housing S1, S2: Gap S, S3: Space 33: Opening

Claims (6)

It is a bearing structure of a rotating shaft of a crusher that supports the axis of a rotor with a crushing blade attached to the surface in a horizontal posture so as to be rotatable, and crushes the material to be crushed,
The end of the rotor is fitted into a cylindrical frame, and the rotation shaft of the rotor is supported by a bearing provided in a bearing housing, and between the end surface of the rotor and the end surface of the cylindrical frame or the bearing housing. A bearing structure for a rotating shaft of a crusher, in which a space having a gap larger than a gap formed between the end surface of the rotor and the cylindrical frame disposed to face the rotor is formed.   The bearing structure of the rotating shaft of the crusher according to claim 1, wherein an opening communicating with the space is formed in a lower part of the cylindrical frame or the bearing housing.   The bearing structure of the rotating shaft of the crusher according to claim 1 or 2, wherein a blade that rotates in the space as the rotor rotates is provided on an end surface of the rotor.   The end peripheral surface of the rotor that is fitted into the cylindrical frame and faces the cylindrical frame is formed with a larger diameter than the central peripheral surface of the rotor. Bearing structure of the rotating shaft of the crusher.   A recovery portion is provided below the rotor to drop and collect the object to be crushed by the crushing blade through a discharge screen, and guide chute that guides foreign matter that has entered the space from the opening to the recovery portion. The bearing structure of the rotating shaft of the crusher in any one of Claim 2 to 4 provided with these. It is a bearing structure of a rotating shaft of a crusher that supports the axis of a rotor with a crushing blade attached to the surface in a horizontal posture so as to be rotatable, and crushes the material to be crushed,
An end of the rotor is fitted into a cylindrical frame, and a rotating shaft of the rotor is supported by a bearing provided in a bearing housing, and the rotor is disposed between an end surface of the rotor and an end surface of the cylindrical frame. A bracket having a gap larger than a gap formed between the peripheral surface of the end portion and the frame disposed opposite to the frame is formed, and a bracket attached to the cylindrical frame so as to extend in a direction opposite to the rotor. A bearing structure for a rotating shaft of a crusher, wherein the bearing housing is supported, and an openable / closable inspection port for inspecting the space is provided on an end surface of the cylindrical frame.

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