JP5661316B2 - Degradation state judgment method of roller - Google Patents

Description

  The present invention relates to a roller deterioration state determination method applied to life management of a roller having a rolling bearing incorporated in various mechanical facilities.

  In various mechanical facilities where many rollers having rolling bearings are installed, smooth operation of the bearing accompanying normal rotation of each roller is indispensable. When a roller or its bearing is deteriorated or damaged due to its life or the like, normal rotation of the roller is hindered, and abnormal vibration or heat generation of the operating roller becomes remarkable. However, in a mechanical facility in which a large number of rollers are installed, considerable management is required both in terms of system and manpower in order to detect abnormal vibrations and heat generation of each operating roller.

  For example, in a machine facility such as a belt conveyor in which a roller and a conveyance belt are in contact with each other, a large number of intermediate rollers may support the conveyance belt. Such a belt conveyor can be operated by a large number of normally rotating rollers, even if one or more arbitrary intermediate rollers have a rotation anomaly. However, during the operation of the belt conveyor, the abnormally rotating roller continues to transmit frictional heat to the conveyor belt side by contact with the conveyor belt. Abnormal heating of the conveyor belt can cause a belt conveyor fire.

  Therefore, usually, each roller is treated so as to be replaced at a safer time before the rated bearing life has passed since the previous replacement record. In other words, among the rollers to be replaced, there are still rollers that can be used normally without definite deterioration or damage in the rollers or their bearings.

  By the way, as a measure to prevent belt conveyor fire, a belt that uses an infrared sensor and a technology that detects a change in the intensity of light passing above the belt conveyor due to gas disturbance or smoke caused by the occurrence of a high temperature part while the belt conveyor is stopped. There is a technique having a function of detecting a high temperature part during operation of a conveyor (see Patent Document 1). According to such a technique, abnormal heat generation points such as a belt conveyor drive motor and a roller can be detected, and danger can be prevented by warning or stopping the belt conveyor in operation.

Japanese Patent No. 188109

  For example, if the technology for detecting a high temperature part of a belt conveyor according to Patent Document 1 is newly incorporated into a belt conveyor device, for example, there is a problem that the system becomes a large-scale system and costs increase. Further, according to Patent Document 1, it is supposed that the heat generation location can be specified from the history data of the heat generation of the belt during the operation of the belt conveyor. However, there is a concern that it is difficult to specify an abnormal part (abnormal roller) in a plurality of rollers that are in the middle of an operating belt conveyor and support a conveyance belt.

  It is an object of the present invention to provide a roller deterioration state determination method capable of detecting vibrations and heat generation abnormalities of each operating roller with a simple method even in mechanical equipment having a large number of rollers installed. And

  When the roller or its bearing is deteriorated or damaged during the operation of the apparatus in which the roller is incorporated, the inventors of the present invention reduce the rotation speed and increase the heat generation amount even if the roller tries to rotate normally. Pay attention. Therefore, the following method is provided for easily detecting a decrease in the number of rotations that causes an increase in the heat generation amount of the roller.

  (1) A monitored part creation procedure for attaching, to the side surfaces of a plurality of rollers in a device in which a plurality of rollers are incorporated, a color and a pattern that changes in appearance according to a change in the number of rotations of the roller as the monitored part; During rotation of a plurality of rollers during operation of the apparatus, by monitoring and comparing the change pattern of the monitored portion of each roller, a roller having a rotation speed lower than the standard rotation speed is specified, and heat generation abnormality of the specified roller is determined. A method for determining the deterioration state of the roller.

  According to the roller deterioration state determination method of (1) above, a monitored portion having the same color and pattern is attached to each of the plurality of rollers to be monitored and compared that should be rotated at the same number of rotations. It is preferred that The plurality of rollers are observed to be monitored portions exhibiting the same change pattern when there is no rotation abnormality roller during operation of the apparatus. However, when an arbitrary roller (or its bearing) of the plurality of rollers deteriorates or is damaged, the number of rotations decreases by that arbitrary roller, and the change in the monitored portion is different from other normally rotating rollers. Presents a pattern. In this way, the change patterns presented by each monitored unit are compared for a plurality of operating rollers, and a roller with abnormal rotation is specified. It is determined that the roller with abnormal rotation is causing abnormal heat generation, and is subject to replacement.

  Further, in order to grasp (store) the change pattern presented by the monitored unit in advance and refer to the comparison (determination) target, the deterioration state of the roller having the storage procedure as in (2) below. A determination method may be provided.

  (2) As a monitored part on the side of the roller, a monitored part creation procedure for attaching a color and a pattern that changes in appearance according to a change in the rotation speed of the roller, and a predetermined rotation through the monitored part creation procedure A storage procedure for storing a change pattern of a monitored portion on a side surface of the roller rotating by a number, and a determination procedure for determining a heat generation abnormality of the roller by referring to the change pattern stored in the storage procedure when the roller rotates A method for determining a deterioration state of a roller.

  According to the roller deterioration state determination method of (2) above, rotation is performed by observing the monitored portion of the roller to be compared (determined) while referring to the change pattern of the monitored portion stored by the storage procedure. Identify the abnormal roller. It is determined that the roller with abnormal rotation is causing abnormal heat generation, and is subject to replacement.

  In addition, in the above-described roller deterioration state determination method (2), when grasping (storing) the change pattern exhibited by the monitored portion in advance, the roller rotating at the main rotation speed and the change pattern exhibited by the monitored portion The relationship is important and includes the following (3) or (4).

  (3) In the storing procedure, the predetermined rotational speed of the roller for storing the change pattern of the monitored portion on the side surface of the roller during the rotation is a standard rotation in a device in which the roller is incorporated. The number of revolutions and the number of revolutions considered abnormal are at least one kind.

  (4) In the storing procedure, the predetermined number of rotations in the roller for storing the change pattern of the monitored portion on the side surface of the roller at the time of rotation is a plurality of types. The initial number of rotations and the number of rotations obtained by gradually decreasing the number of rotations from the initial number of rotations.

  Further, in the roller deterioration state determination method according to any one of (1) to (4) above, when a plurality of rollers are rotated, the following efficient determination (5) contributes to the maintenance of the apparatus.

  (5) In the determination procedure, when the rollers are rotated, a plurality of the rollers are rotating in a device in which a plurality of the rollers are incorporated, and the rollers are rotating at a rotation speed that is standard in the device. In comparison, it is considered that a roller exhibiting a change pattern of the monitored portion having a reduced number of rotations has a larger amount of heat generated by the rotation.

  According to the present invention, during operation of the apparatus in which the roller is incorporated, only the roller having a critical problem in the roller or its bearing is specified, and therefore, only the roller to be replaced other than the roller that can still be used normally. It is possible to provide a method for determining the deterioration state of a roller that can be replaced.

It is the schematic of the belt conveyor apparatus which can apply the method of this invention. It is a flowchart which shows the deterioration state determination method of the roller which concerns on one Embodiment of this invention. FIG. 2 is an overview diagram illustrating an example of a monitored portion on a side surface of a roller according to the present invention in FIG. 1. It is a 1st general | schematic figure which shows the change pattern of the to-be-monitored part of the rotating roller side surface in FIG. 3 in operation of the belt conveyor apparatus. It is a 2nd general | schematic figure which shows the change pattern of the to-be-monitored part of the rotating roller side surface in FIG. 3 in operation of the belt conveyor apparatus. It is a flowchart which shows the deterioration state determination method of the roller which concerns on the modification of FIG.

In the present embodiment, a case where the present invention is applied to an apparatus in which a plurality of rollers are incorporated, such as a belt conveyor, is taken as an example.
FIG. 1 is a schematic view of a belt conveyor apparatus to which the method of the present invention can be applied. The belt conveyor device 200 has a configuration in which a conveyance belt 24 is provided between end rollers 21 and 22 at both ends, and a large number of intermediate rollers 23 support the conveyance belt 24. Of the end rollers 21 and 22 at both ends, both (or one) are drive rollers.

  In the method of the present invention, it is indispensable to attach colors and patterns that change the appearance according to changes in the number of rotations of the rollers as the monitored parts on the side surfaces of the plurality of rollers in an apparatus in which a plurality of rollers are incorporated. is there. The monitored portion is mainly disposed on a large number of intermediate rollers 23. This is because the end rollers 21 and 22 at both ends including the drive roller are important and are often specially monitored and managed. Although the end rollers 21 and 22 may be provided with monitored portions according to the present invention, if the monitored portions of the present invention are used for the overwhelmingly large number of intermediate rollers 23, a large number of intermediate rollers can be simplified. Can be monitored and managed.

  FIG. 2 is a flowchart showing a roller deterioration state determination method according to an embodiment of the present invention. FIG. 3 is a schematic view showing an example of a monitored portion on the side surface of the roller according to the present invention in FIG.

  Referring to FIG. 2, the monitored portion creation process S <b> 10 is performed on the side surfaces of a plurality of rollers in a device in which a plurality of rollers are incorporated. This is a procedure for creating a monitored portion to which a pattern is attached. Further, S101 to S104 performed in the inspection / inspection process S100 during operation of the apparatus is performed by monitoring and comparing the change pattern of the monitored portion of each roller during rotation of the plurality of rollers during operation of the apparatus. This corresponds to a determination procedure in which a roller having a rotational speed lower than that of the specified roller is identified and abnormal heat generation of the identified roller is determined. Details will be described below.

  In FIG. 2, first, a monitored part creation process is performed (S10). Colors and patterns that change in appearance according to changes in the number of rotations of the rollers are attached to the side surfaces of a plurality of (≧ n) rollers in the belt conveyor apparatus to be monitored.

  A plurality of rollers to be monitored and compared, which should be rotated in the same range of rotations, such as the intermediate roller 23 provided in one unit of the belt conveyor apparatus 200 in FIG. 1, are all monitored in the same color and pattern. It is preferable that a part is attached.

  Referring to FIG. 3, a number of intermediate rollers 23 that support the conveyor belt 24 of the belt conveyor device 200 are fixed by bearing support portions 25. The side faces of the intermediate rollers 23 are all provided with monitored parts MP having the same color and pattern. Accordingly, the monitored portions MP of the same color and pattern are also attached to the side surfaces of any two intermediate rollers 23a and 23b shown in FIG. The color and pattern of the monitored portion MP here are designed as two black sectors shaped like a white base and close to one semicircle side. The monitored unit MP is not particularly limited as long as it has a color and a pattern that change in appearance according to a change in the number of rotations of the roller.

  In creating the monitored portion MP, for example, a template (or mask) for spray application is prepared, and the template is applied to the side surface of each roller and sprayed, and a pattern according to the template pattern is uniformly formed. Good.

  More specifically, white or bright fluorescent color or the like is applied to the side surface of each intermediate roller 23 as a base. It is convenient to use a special template for the base coating. Next, the pattern drawn on the base may be a simple design such as one (or one or more) black fan shape or black circle. In addition, a design using a so-called Benham frame may be applied.

  With reference to FIGS. 1 to 3, the monitored section creation processing S <b> 10 may be replaced with a roller with the monitored section MP when an arbitrary roller is replaced for each unit of the belt conveyor device 200. Alternatively, it is conceivable that the monitored portion is appropriately attached to each roller for each unit of an arbitrary device even if it is not the roller replacement time. In both of the above processes, appropriate measures such as assigning a spare roller during the operation of the belt conveyor device are taken, and then individually replaced with the roller with the monitored portion MP or the monitored portion MP is attached to the current roller. You can do the work to attach.

  Referring to FIG. 2, during the operation of the apparatus (belt conveyor apparatus) in which the monitored parts MP are attached to the side surfaces of the plurality of rollers as described above, inspection and inspection are performed by an operator (S100). At that time, a plurality of rollers to be inspected are monitored and compared. A plurality of rollers that rotate in the same range of rotation speeds are all provided with monitored portions having the same color and pattern in the monitored portion creation processing S10. A monitored part exhibiting a uniform change pattern is observed.

  FIG. 4 is a first overview diagram showing a change pattern of the monitored portion on the side surface of the rotating roller in FIG. 3 during operation of the belt conveyor device. As described above, when there is no abnormally rotating roller, a uniform change pattern of the monitored portion MP can be confirmed also on the side surfaces of any two intermediate rollers 23a and 23b.

  However, when an arbitrary roller (or its bearing) of the plurality of rollers deteriorates or is damaged, the number of rotations decreases by that arbitrary roller, and the change in the monitored portion is different from other normally rotating rollers. Presents a pattern.

  FIG. 5 is a second overview diagram showing a change pattern of the monitored portion on the side surface of the rotating roller in FIG. 3 during operation of the belt conveyor device. When deterioration or damage of the roller (or its bearing) occurs in the intermediate roller 23b, the number of rotations of the intermediate roller 23b drops, and the change pattern of the monitored portion is different from the other normally rotating rollers (23a). Can be confirmed.

  Referring to FIG. 2, as described above, the change patterns presented by the monitored units are compared for a plurality of operating rollers, and it is checked whether there are different change patterns (S101). That is, a roller having a rotational speed lower than the standard rotational speed is specified, and the heat generation abnormality of the specified roller is determined (S102).

  As described above, the abnormal heat generation roller determination process (S102) determines that the abnormal rotation roller generates abnormal heat when the abnormal rotation roller is identified from the change pattern exhibited by the monitored portion. Is done. However, as a precaution, the worker may measure the amount of heat generation such as temperature with respect to the abnormally rotating roller using a heat sensor using infrared rays.

  In the process S101, the change patterns exhibited by the monitored units are compared for a plurality of operating rollers, and when it is determined that no different change pattern is found, or after the process of determining abnormal heating rollers (S102) Then, the process proceeds to process S103 for determining the end of inspection. In this process S103, when all the apparatuses (belt conveyor apparatuses) to be inspected at that time have been inspected, the process proceeds to a roller replacement process.

  In the above roller replacement process, before entering the main operation of the replacement process, it is checked once again whether the determination of the abnormal heat generation roller specified in the process of S102 is correct or whether the roller should be truly replaced. Opinions may be exchanged with a person other than the worker who performed the operation.

  On the other hand, if the end of the inspection is not determined in step S103, the operator moves to the next device unit (next belt conveyor device) to be inspected (S104), and the inspection / inspection including the above-described processing S101 and S102 is performed again. Is done.

  According to the roller deterioration state determination method according to the above-described embodiment, each of a plurality of rollers to be monitored and compared that should be rotated at the same number of rotations is provided with a monitored portion having the same color and pattern. The The plurality of rollers are observed to be monitored portions exhibiting the same change pattern when there is no rotation abnormality roller during operation of the apparatus. However, when an arbitrary roller (or its bearing) of the plurality of rollers deteriorates or is damaged, the number of rotations decreases by that arbitrary roller, and the change in the monitored portion is different from other normally rotating rollers. Presents a pattern. In this way, the change patterns presented by each monitored unit are compared for a plurality of operating rollers, and a roller with abnormal rotation is specified. It is determined that the roller with abnormal rotation is causing abnormal heat generation, and is subject to replacement.

  FIG. 6 is a flowchart showing a roller deterioration state determination method according to the modification of FIG. Compared to FIG. 2, a storage process S <b> 11 is provided after the monitored part creation process S <b> 10 to grasp (store) a change pattern exhibited by the monitored part. Then, when the inspection / inspection while the apparatus is operating in S100 is performed, the process of S101a is performed instead of the process of S101. That is, with respect to the n monitored parts to be inspected, it is determined by referring to the stored change pattern whether there is a change pattern recognized as a rotation abnormality (S101a). Since other processes are the same as those in FIG.

  According to the roller deterioration state determination method according to the embodiment of FIG. 6 described above, the comparison is made while referring to the change pattern of the monitored part stored by the storage process S11 for grasping (storing) the change pattern exhibited by the monitored part. (Determination) The monitored part of the target roller is observed.

  Such storage processing S11 may be surely learned by a skilled worker. Alternatively, it is conceivable that the sample image corresponding to the storage process S11 is stored in the portable device of the worker to be inspected or stored / accumulated in the host management unit and used effectively. This contributes to the identification of the abnormally rotating roller. It is determined that the roller with abnormal rotation is causing abnormal heat generation, and is subject to replacement.

  The change pattern exhibited by the monitored unit stored in the storage process S11 will be described below. The change pattern of the monitored portion on the side surface of the roller rotating at a predetermined rotational speed is stored, and this predetermined rotational speed is stored in a device in which the roller is incorporated, for example, the belt conveyor device 200 in FIG. At least one of the standard number of rotations and the number of rotations regarded as abnormal is set.

  Here, if the worker knows (stores) the change pattern of the monitored portion on the side surface of the roller rotating at the standard number of rotations, the roller with abnormal rotation is identified during inspection and inspection. Contribute to. Also, if the operator knows (stores) the change pattern of the monitored part on the side of the roller rotating at the abnormal rotation speed, it is possible to identify the abnormal rotation roller during inspection and inspection. Contribute. Depending on the degree, it is determined that the abnormally rotating roller having a reduced number of rotations is generating abnormal heat and is subject to replacement.

  Further, another example of the storage process S11 will be described below. When the change pattern of the monitored portion on the side surface of the roller rotating at the predetermined rotational speed is stored, the predetermined rotational speed is a plurality of types. Preferably, in the apparatus in which the roller is incorporated, for example, the belt conveyor apparatus 200 in FIG. 2, the standard initial rotational speed and several kinds of rotational speeds obtained by gradually decreasing the rotational speed from the initial rotational speed are set.

  Here, the operator grasps the standard initial rotation speed and the change pattern of the monitored portion on the side surface of the roller rotating at several types of rotation speeds obtained by gradually reducing the rotation speed from the initial rotation speed. If it is (memorized), it contributes to grasping the degree of abnormality when identifying a roller with abnormal rotation during inspection and inspection. Thereby, the operator is not worthy of replacement at the present stage, but it is easy to obtain information on rollers that are likely to become abnormal in the near future and statistics up to the replacement time, for example, for each device unit. The roller identified as abnormal in rotation while grasping the degree of decrease in the rotational speed is determined as causing abnormal heat generation and is subject to replacement.

  With regard to the method for determining the deterioration state of the roller in FIG. 6 described above, the worker goes on a patrol / inspection with a portable device storing a sample image corresponding to the storage process S11. In addition, the operator acquires an image of the rotating side surface of the roller during actual inspection and inspection at the time of inspection / inspection, and uses communication with the host management unit that stores the sample image corresponding to the storage process S11, It is also possible to work by referring to and comparing.

  According to the method of the above embodiment, during the operation of the apparatus in which the roller is incorporated, only the roller having a critical problem in the roller or its bearing is specified. It is possible to provide a roller deterioration state determination method in which only the roller to be replaced can be replaced.

200 Belt conveyor device 21, 22 End roller 23 Intermediate roller 24 Conveyor belt 25 Bearing support unit MP Monitored unit S10, S11, S100, S101 to S104

Claims (5)

A monitored part creation procedure for attaching a color and a pattern that changes in appearance according to a change in the number of rotations of the roller as a monitored part on a side surface of the plurality of rollers in an apparatus in which a plurality of rollers are incorporated;
Monitor and compare the monitored pattern of each monitored part of each roller where a monitored part exhibiting a similar change pattern can be observed during rotation of a plurality of rollers that should rotate at the same range of rotational speed during operation of the device A determination procedure for identifying a roller having a rotation speed that falls below a standard rotation speed that exhibits a change pattern of a monitored portion that is different from that of other rotating rollers, and determining a heat generation abnormality of the identified roller When,
A method for determining the deterioration state of a roller. The side surface of the plurality of rollers in the apparatus in which a plurality of rollers is incorporated, and the monitoring unit creation process subjecting the color and pattern to change appearance according to the rotation speed of the change of the roller as a monitored unit,
A storage procedure for storing a change pattern of the monitored portion on the side surface of the roller that rotates at a predetermined rotation speed through the monitored portion creation procedure;
Upon rotation of the rollers to be rotated at a rotational speed of the same range as during operation of the device, said with reference to the stored change pattern in the storage procedure, the monitored unit which is different from the roller which is the other rotational A determination procedure for identifying a roller that exhibits a change pattern of less than the standard number of rotations and determining a heat generation abnormality of the roller,
A method for determining the deterioration state of a roller.   In the storing procedure, the predetermined rotational speed of the roller for storing the change pattern of the monitored portion on the side surface of the roller at the time of rotation is the standard rotational speed and abnormality in the apparatus in which the roller is incorporated. The roller deterioration state determination method according to claim 2, wherein at least one kind of rotation speeds among the rotation speeds is set.   In the storing procedure, the predetermined number of rotations in the roller for storing the change pattern of the monitored portion on the side surface of the roller at the time of rotation is a plurality of types, and is standard in an apparatus in which the roller is incorporated. The roller deterioration state determination method according to claim 2, wherein an initial rotational speed and several kinds of rotational speeds obtained by gradually decreasing the rotational speed from the initial rotational speed are used. Wherein in the determination procedure, and rotated by the plurality of the rollers during operation of the prior KiSo location to support the conveyor belt, rotating compared to the roller being rotated at a rotational speed which is a standard in the device The roller deterioration state determination method according to any one of claims 1 to 4, wherein a roller exhibiting a change pattern of a monitored portion, the number of which is decreasing, is considered to generate a larger amount of heat as a result of rotation.

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