JP2018044856A - Roller test device and roller test method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evaluate a service life of a roller in an operation environment where dust is scattered.SOLUTION: A roller test device includes: a sealable test container; at least a pair of support members provided inside the test container, and supporting both ends of the test roller; a driving roller provided at a position of contacting with the test roller supported the at least pair of support members on the inside of the test container, and configured to rotate the test roller with a load applied to the test roller; and an air feeding mechanism configured to agitate dust dispersed into the test container, on the inside of the test container.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a roller testing apparatus and a roller testing method.

  A roller such as a carrier roller or a return roller of the belt conveyor is damaged by adhesion of dust scattered from raw materials such as ore conveyed by the belt conveyor or wear due to the dust. For example, the following Non-Patent Document 1 discloses a method for inspecting the appearance, dimensions, and materials of a roller for a belt conveyor, but there is no particular regulation regarding evaluation regarding the life of the roller during operation. The cause of the failure of the roller depends on the usage environment of the belt conveyor having the roller, and a roller manufacturer or a standard unique to the manufacturer is provided for each usage environment.

  One of the causes of failure of the rollers of the belt conveyor is the failure of the roller bearings. Damage to the bearing is said to be caused by dust that has entered from the outside of the bearing passing through the seal and adhering to the cage, bearing and grease. In particular, a belt conveyor that transports raw materials such as ore is installed in an environment where dust is likely to fly around. That is, the belt conveyor is installed in an environment where dust easily enters the roller bearing. Accordingly, since a large amount of dust enters the bearing, the roller can be damaged in a shorter time than the expected life of the roller. In other words, in an environment where dust easily floats and scatters, the high sealing performance of the bearing is considered to affect the life of the roller.

  As a technique for evaluating the high sealing performance of a bearing, for example, Patent Document 1 below discloses a technique for spraying muddy water onto the bearing while applying a load to the bearing.

Japanese Patent Laid-Open No. 11-23422

JIS B 8803, "roller for belt conveyor"

  However, the technique disclosed in Patent Document 1 sprays muddy water directly on the bearing, and is a technique for evaluating the performance of the bearing as a seal material. Therefore, with the technique disclosed in Patent Document 1, it is difficult to evaluate the life of the rollers in the actual operation period (for example, several months) of the belt conveyor. In an actual belt conveyor operating environment, dust is randomly scattered from all directions. No technology has been proposed for evaluating the life of a roller by simulating such an operating environment.

  Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is a new and improved roller capable of evaluating the life of a roller in an operating environment in which dust is scattered. It is to provide a test apparatus.

  In order to solve the above problems, according to an aspect of the present invention, a test container that can be sealed, at least a pair of support members that are provided inside the test container and support both ends of the test roller, and the test container And a drive roller that rotates the test roller while applying a load to the test roller, and is applied to the inside of the test container. And a blower mechanism that stirs the dust inside the test container.

  When two test rollers are provided, even if the two pairs of support members are arranged side by side at positions where the two test rollers are symmetrical with respect to a vertical plane passing through the rotation shaft of the drive roller. Good.

  The pair of support members may be provided so as to be movable in a direction parallel to the rotation axis of the drive roller.

  The blower mechanism may include two blowers, and the two blowers may be provided at diagonal positions inside the test container.

  The test container is provided with a main body having an opening at the top, the driving roller, supported by the arm, and rotated around a horizontal axis provided on the arm, thereby opening the opening of the main body. The arm may be provided with a counterweight on the opposite side of the lid member with respect to the horizontal axis.

  The roller testing apparatus may further comprise a measuring mechanism for measuring data relating to the test roller under test.

  The data regarding the test roller may be at least one of a vibration value of the test roller and a shaft temperature of the roller.

  The roller testing apparatus further includes a nozzle for spraying water to the inside of the test container, and a pump for collecting the water accumulated at the bottom of the test container and supplying the water to the nozzle. Also good.

  The test roller may include a carrier roller or a return roller.

  In order to solve the above problems, according to another aspect of the present invention, the test roller is supported by using at least a pair of support members provided inside a sealable test container, and at least the pair of support members. The driving roller is brought into contact with the test roller supported on the inner side of the test container, and the dust scattered inside the test container is stirred inside the test container sealed with a blower mechanism. A method for testing a roller is provided in which the test roller is rotated while a load is applied to the test roller.

  As described above, according to the present invention, it is possible to evaluate the life of a roller in an operating environment where dust is scattered.

1 is a schematic configuration diagram illustrating an example of a test apparatus according to a first embodiment of the present invention. It is the schematic which shows an example of the opening / closing operation | movement of the cover member by rotation of the arm which concerns on the same embodiment. It is a graph which shows the relationship of the load given to the test roller with respect to the weight of the counterweight which concerns on the same embodiment. It is the schematic which shows the example of arrangement | positioning of the supporting member and fan inside the test container which concerns on the same embodiment. It is the schematic which shows the 1st modification regarding arrangement | positioning of the supporting member inside the test container which concerns on the embodiment. It is the schematic which shows the 2nd modification regarding arrangement | positioning of the supporting member inside the test container which concerns on the embodiment. It is a schematic block diagram which shows an example of the test apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of schematic structure in planar view of the test container which concerns on the embodiment. It is a graph which shows the change of the shaft temperature and vibration value which concern on each roller.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<< 1. First Embodiment >>
<1.1. Configuration>
FIG. 1 is a schematic configuration diagram showing an example of a test apparatus 1 according to the first embodiment of the present invention. As shown in FIG. 1, the test apparatus 1 according to the present embodiment includes a test container 2 including a main body 3 and a lid member 4 that are test tanks, a support member 5 (5A, 5B), a drive roller 6, a motor 7, and a drive. A belt 8, an intermediate pulley 9, a drive pulley 10, a fan 13, an arm 15, a support shaft (horizontal shaft) 16, and a counterweight 17 are provided. The support member 5, the drive roller 6, and the fan 13 are provided inside the test container 2. Hereinafter, each component will be described.

  The test container 2 has a space sealed by the main body 3 and the lid member 4. Specifically, the test container 2 is provided so that the lid member 4 opens and closes the opening formed in the upper part of the main body 3. In addition, a seal material 4A is provided on the upper portion of the main body 3 according to the present embodiment. The main body 3 abuts against the lid member 4 via a sealing material 4A. As the sealing material 4A, for example, a known sealing material such as packing is used. Further, the sealing material 4 </ b> A may be provided not on the main body 3 but on the lid member 4. Alternatively, the sealing material may be provided on both the main body 3 and the lid member 4.

  A pair of support members 5 are provided inside the main body 3. The pair of support members 5 are provided so as to stand up from the bottom 14 of the main body 3 and to face each other along the Y direction shown in FIG. The pair of support members 5 support both ends of the test roller 11. Specifically, the pair of support members 5 support both ends of the test roller 11 by holding the support shaft of the test roller 11 with the holding unit 12. At this time, the support member 5 is adjusted so that the height (position in the Z-axis direction) at which the test roller 11 contacts the drive roller 6 is reached. Thereby, the test roller 11 can receive a load and a rotational force from the drive roller 6. The structure of the holding part 12 is not particularly limited as long as it can hold the support shaft of the test roller 11.

  In the present embodiment, one pair or two pairs of support members 5 are provided. That is, the test apparatus 1 according to the present embodiment can perform a test on one or two rollers in one test. For example, in the example shown in FIG. 1, two pairs of support members 5A and 5A support the test rollers 11A and 11A, respectively. An example of the arrangement of the pair of support members 5 will be described later.

  The driving roller 6 is a roller that rotates the test roller 11 while applying a load to the test roller 11. For example, in the example shown in FIG. 1, the driving roller 6 receives the driving force generated by the motor 7 via the driving pulley 10 having the same rotation shaft, and uses the driving force to move the test roller 11. Rotate. The driving force is transmitted to the driving pulley 10 via the driving belt 8. The intermediate pulley 9 is provided to increase the tension in the driving direction applied to the driving belt 8. This improves the transmission efficiency of the driving force.

  In addition, the load given to the test roller 11 by the driving roller 6 is about 0 to 4 kN in total. For example, when a test is performed on two test rollers 11, the maximum load received by the two test rollers 11 is about 1.8 kN (total 3.6 kN). These maximum loads are approximately 1.5 to 3 times the load applied to the rollers during actual belt conveyor operation. Further, the number of rotations related to the rotation of the test roller 11 by the driving roller 6 can be set larger than that during actual operation of the belt conveyor. Therefore, by using the test apparatus 1 according to the present embodiment, it is possible to perform an accelerated test on the life of the test roller 11. Therefore, the life in the operating environment of the test roller 11 can be evaluated in a short time.

  Further, the drive roller 6 according to the present embodiment is provided inside the lid member 4. The driving roller 6 applies a predetermined load to the test roller 11 when the lid 2 is in contact with the main body 3 and the test container 2 is in a sealed state. On the other hand, when the test container 2 is in an open state, the drive roller 6 follows the lid member 4, so that the drive roller 6 is separated from the test roller 11. Thereby, the installation or removal of the test roller 11 can be performed.

  Further, the driving roller 6 and the driving pulley 10 according to the present embodiment are supported by the arm 15. FIG. 2 is a schematic diagram illustrating an example of the opening / closing operation of the lid member 4 by the rotation of the arm 15 according to the present embodiment. As shown in FIG. 2, by rotating the arm 15 around the support shaft 16, the lid member 4 rotates to open and close the upper portion of the main body 3.

  Further, a counterweight 17 is provided on the opposite side of the arm 15 to the lid member 4. When the weight of the counterweight 17 is adjusted, the load applied to the test roller 11 of the driving roller 6 provided on the lid member 4 changes according to the principle of the lever as shown in FIG. For example, when the weight of the counterweight 17 is increased, the load of the driving roller 6 applied to the test roller 11 is decreased. In this way, by adjusting the weight of the counterweight 17, it is possible to adjust the load of the driving roller 6 applied to the test roller 11.

  FIG. 3 is a graph showing the relationship of the load applied to the test roller 11 with respect to the weight of the counterweight 17. As shown in the graph of FIG. 3, it can be seen that the load of the driving roller 6 applied to the test roller 11 decreases linearly as the weight of the counterweight 17 is increased. Therefore, the load of the driving roller 6 applied to the test roller 11 can be easily adjusted only by changing the weight of the counterweight 17.

  In the test apparatus 1 according to this embodiment, the load of the driving roller 6 applied to the test roller 11 is adjusted by changing the weight of the counterweight 17, but the present invention is not limited to such an example. For example, the load of the driving roller 6 may be adjusted by suspending a weight directly on the driving roller 6 or by pulling the lid member 4 provided with the driving roller 6 vertically upward.

  Further, the shape of the arm 15 is not particularly limited. The arm 15 according to the present embodiment is configured by two beams extending in parallel, and the cover member 4 is formed of the two beams so that the accommodating portion of the drive roller 6 of the cover member 4 is positioned between the two beams. Supported by the beam. Thereby, it is possible to rotate the cover member 4 stably. In this case, the counterweight 17 is provided so as to bridge between the two beams. Thereby, the deviation of the distribution of the load of the driving roller 6 applied to the test roller 11 in the Y-axis direction can be suppressed.

  A fan 13, which is an example of a blower that constitutes a blower mechanism, is provided inside the test container 2. As shown in FIG. 2, the fan 13 has a function of stirring the dust sprayed inside the test container 2 inside the test container 2. In addition, although the fan 13 is demonstrated to an example as a blower which concerns on this embodiment, this blower is not limited to a fan. For example, the blower mechanism is not particularly limited as long as it is a fluid machine that stirs gas and dust, such as a blower such as a blower or a compressor such as a pump. In the present embodiment, the fan 13 is employed as a blower because it is sufficient to have the ability to disperse dust inside the test container 2.

  Note that the fan 13 is preferably provided in the vicinity of the bottom of the test container 2 in order to efficiently stir the dust accumulated in the bottom 14 inside the test container 2. One or more fans 13 may be provided. For example, as will be described in detail later, it is preferable that the two fans 13 are provided at a diagonal position of the test container 2 in the horizontal direction. Thereby, dust can be stirred more efficiently inside the test container 2.

  Moreover, it is preferable that the dust spread | dispersed inside the test container 2 is the dust of the raw material which exists in the operating environment of an actual belt conveyor. This is because the test environment can be simulated more like an actual operating environment. Therefore, it is preferable that the kind of dust is a raw material which a belt conveyor can actually carry. The raw material is, for example, iron ore, sintered ore, coke, coal, or lime. Moreover, even if the material conveyed by the belt conveyor itself such as gravel or crushed glass (cullet) is powder, the raw material can be dust according to the present embodiment. Moreover, although the particle size of the dust used for the test apparatus 1 which concerns on this embodiment is not specifically limited, It is preferable that it is about 10 micrometers-1000 micrometers which is the particle size range of the dust which exists in an actual operating environment.

  The dust described above is sprayed inside the test container 2 before the test by the test apparatus 1 is started. For example, when the lid member 4 of the test container 2 is removed, the dust may be introduced from above the main body 3. Further, a charging port for charging dust may be provided in a part of the main body 3 or the lid member 4. The magnitude | size of the said insertion port should just be large enough to throw in dust inside the test container 2. FIG. Thereby, it is possible to prevent the dust that rises when dust is sprayed inside the test container 2 from leaking out of the test container 2. Further, it is possible to spray dust inside the test container 2 even during the test.

  The configuration of the test apparatus 1 according to this embodiment has been described above. Next, a test method for the test roller 11 using the test apparatus 1 according to this embodiment will be described. First, at least one test roller 11 is supported using at least a pair of support members 5 provided inside the sealed test container 2. Thereafter, the driving roller 6 is brought into contact with the test roller 11. The test roller 11 is rotated while applying a load to the test roller 11 by the driving roller 6 while stirring the dust using the fan 13 in the space inside the test container 2.

  From the above, it is possible to evaluate the life of the test roller in an environment close to the actual operating environment using the test apparatus 1 according to the present embodiment. By the test method using the test apparatus 1, it becomes possible to maintain a roller inspection standard that more reflects the actual operation state.

<1.2. Example of arrangement of support member and fan>
Next, an arrangement example of the support member 5 and the fan 13 according to the present embodiment will be described. The support member 5 is provided at an optimal position as appropriate according to the number and type of test rollers 11 to be tested. Further, the fan 13 is provided so that the dust dispersed inside the test container 2 can be dispersed to the maximum extent in the space inside the test container 2.

  FIG. 4 is a schematic diagram illustrating an arrangement example of the support member 5 and the fan 13 inside the test container 2 according to the present embodiment. 4 is a cross-sectional view of the test container 2 taken along the line IV-IV shown in FIG.

  The example shown in FIG. 4 is an arrangement example of the support member 5A and the test roller 11A when a test is performed on two rollers in one test. As shown in FIG. 4, on the XY plane (horizontal plane), the test rollers 11A and 11A are symmetrical with respect to the vertical plane passing through the rotation axis (dashed line) of the drive roller 6 (dashed line). Two pairs of support members 5A are juxtaposed. At this time, the support member 5 </ b> A holds the support shaft 102 of the test roller 11 </ b> A that extends outward through the shaft hole of the bearing 101 by the holding portion 12. By providing the support member 5A in this way, the test rollers 11A and 11A can receive a load from the drive roller 6 evenly. Therefore, the test can be performed under the same conditions for two rollers in one test. Thereby, for example, it is possible to perform a performance comparison test regarding the life of two different rollers.

  As shown in FIG. 4, two fans 13 according to the present embodiment are provided, and are provided at diagonal positions of the main body 3. In addition, the air blowing directions of the fans 13 are opposite to each other along the X-axis direction and are along the inner wall of the main body 3. Thereby, as shown in FIG. 4, the dust stirring direction is clockwise (or counterclockwise) along the inner wall of the main body 3. Therefore, dust can be dispersed as much as possible in the space inside the main body 3. Therefore, the actual operating environment can be reproduced more faithfully.

  In addition, although the shape in the XY plane of the main body 3 which concerns on this embodiment was made into the rectangle, this invention is not limited to this example. For example, when the shape of the main body 3 on the XY plane is a circle or an ellipse, the two fans 13 are opposed to each other at the farthest position on the inner wall of the main body 3 and the direction along the inner wall of the main body 3 It is preferable to be provided as follows. Thereby, dust can be dispersed to the maximum extent in the space inside the main body 3.

  Further, the arrangement of the support members 5 according to the present embodiment is not limited to the example shown in FIG. FIG. 5 is a schematic view showing a first modification example regarding the arrangement of the support member 5 inside the test container 2 according to the present embodiment. The example shown in FIG. 5 is an arrangement example of the support member 5B and the test roller 11B when a test is performed on one roller in one test. As shown in FIG. 5, the support member 5 </ b> B is provided at a position where the test roller 11 </ b> B is vertically below the drive roller 6. Thereby, the test can be similarly performed on one test roller 11B. Although the support member 5B in the present modification is a member different from the support member 5A, the support member 5A is moved along the X-axis direction to support one test roller 11B. Good. In this case, the height for supporting the test roller 11B is different from the height for supporting the test roller 11A, as shown in FIG. Therefore, it is preferable that the holding height of the support member 5A with respect to the holding portion 12 of the test roller 11A can be adjusted.

  Moreover, although the test roller 11 shown in FIGS. 4 and 5 is a return roller, the present invention is not limited to such an example. For example, the test apparatus 1 according to the present embodiment can be applied to a carrier roller. FIG. 6 is a schematic diagram illustrating a second modification example regarding the arrangement of the support member 5 inside the test container 2 according to the present embodiment. The example shown in FIG. 6 is an arrangement example of the support member 5A and the carrier roller 11C when the test is performed for two carrier rollers in one test. The pair of support members 5 </ b> A is provided so as to be movable in a direction parallel to the rotation axis of the drive roller 6, as indicated by an arrow in FIG. 6. For example, as shown in FIG. 6, in the case of the carrier roller 11C having a shorter diameter in the longitudinal direction (Y-axis direction) than the return roller, the pair of support members 5A are provided at positions close to each other. Thereby, when supporting either the return roller or the carrier roller, the same support member 5A can be used by changing the position where the support member 5A is provided. Note that separate members may be used for the support member that supports the return roller and the support member that supports the carrier roller.

<1.3. Data on testing>
Next, data measured by the test apparatus 1 according to the present embodiment and a sensor used for acquiring the measurement data will be described. The state of the test roller 11 to be tested by the test apparatus 1 according to the present embodiment is considered to change sequentially during the test. Therefore, it is preferable that the test apparatus 1 is provided with a measurement mechanism that measures data related to the test roller 11 under test.

  The measurement mechanism may be a vibration sensor for measuring the vibration of the test roller 11, for example. In this case, the vibration sensor may be provided, for example, on the support member 5 that supports the test roller 11. In the example shown in FIG. 1, vibration sensors 50 are provided on the support members 5A and 5B, respectively. This is because the vibration of the test roller 11 is transmitted to the support member 5. This vibration sensor measures the vibration of the test roller 11 and outputs a vibration value. This vibration value shows a constant period value when no abnormality occurs during the test, but shows an abnormal value because irregular vibration occurs when the bearing is damaged or the like. That is, by observing the vibration value, it is possible to grasp the timing at which the test roller 11 is damaged.

  The measurement mechanism may be, for example, a thermometer that measures the temperature (shaft temperature) of the support shaft 102 of the test roller 11. In this case, the thermometer may be provided on the support shaft 102, for example. This shaft temperature shows a constant cycle value when no abnormality occurs during the test. However, when the bearing is damaged or the like, the lubrication effect by the bearing is reduced, and the temperature of the bearing rises due to friction. Since the increased temperature is transmitted to the support shaft 102, the shaft temperature shows an abnormal value. That is, by observing the shaft temperature, it is possible to grasp the timing at which the test roller 11 is damaged.

  Further, the measurement mechanism may be, for example, a thermometer that measures the temperature inside the test container 2 (container temperature) or an ammeter that measures the current value of the motor 7 that drives the drive roller 6. These container temperatures and current values can also change at the timing of the breakage of the test roller 11.

  Various data obtained from the above-described measurement mechanism is output to an information processing apparatus (not shown). The information processing apparatus includes, for example, a CPU (Central Processing Unit) that is an arithmetic processing device, a ROM (Read Only Memory) that stores programs and arithmetic parameters used by the CPU, a program used in the execution of the CPU, or an execution thereof The data storage device includes a RAM (Random Access Memory) that temporarily stores parameters and the like that change as needed, and an HDD (Hard Disk Drive) device that stores data and the like. The information processing apparatus may be a computer, for example.

  The information processing apparatus described above acquires data output from each measurement mechanism and accumulates the data in a storage device or the like. The accumulated data may be output to the outside by an output device such as a display or a printer. Thereby, the data regarding the test roller 11 under test can be obtained. That is, the life of the test roller 11 in an environment close to the actual operating environment can be quantitatively evaluated. Further, the information processing apparatus may perform control according to a value indicated by accumulated data (for example, control for outputting a warning when data indicates an abnormal value). As a result, when an abnormality occurs during the test, it is possible to take measures such as a test stop process of the test apparatus 1.

  The test apparatus 1 according to the first embodiment of the present invention has been described above.

<< 2. Second Embodiment >>
Next, a test apparatus 100 according to the second embodiment of the present invention will be described. In the test apparatus 100 according to the present embodiment, watering equipment is further added to the test apparatus 1 according to the first embodiment described above.

  FIG. 7 is a schematic configuration diagram illustrating an example of a test apparatus 100 according to the second embodiment of the present invention. As shown in FIG. 7, the test apparatus 100 according to the present embodiment includes a test container 200 including a main body 3 and a lid member 4 that are test tanks, a support member 5 (5A, 5B), a drive roller 6, a motor 7, and a drive. A belt 8, an intermediate pulley 9, a drive pulley 10, a fan 13, an arm 15, a support shaft (horizontal shaft) 16, and a counterweight 17 are provided. The test apparatus 100 according to the present embodiment further includes a nozzle 18, a recovery slope 19, a pump 20, and a pipe 21. An opening 14 a is further provided in part or all of the bottom 14 of the main body 3. FIG. 8 is a diagram illustrating an example of a schematic configuration in a plan view of the test container 200 according to the present embodiment. Hereinafter, each component will be described with reference to FIGS. 7 and 8. Note that, among the components of the test apparatus 100 according to the present embodiment, the description of the components common to the test apparatus 1 according to the first embodiment is omitted.

  The nozzle 18 is provided on the inner wall of the main body 3 of the test container 200. The nozzle 18 sprays the water supplied from the pump 20 to the inside of the test container 200. Therefore, the nozzle 18 is provided so that the discharge port 18 a of the nozzle 18 faces the inside of the main body 3. The number of nozzles 18 installed is not particularly limited. For example, as shown in FIG. 8, a plurality of nozzles 18 may be provided along the inner wall of the main body 3 along the longitudinal direction (Y-axis direction) of the test roller 11A. Thereby, it becomes easy to spread water over the whole test roller 11A. The size of the discharge port 18a of the nozzle 18 is not particularly limited, but since the water sprayed from the nozzle 18 contains a large amount of dust, the size of the discharge port 18a of the nozzle 18 is such that the discharge port 18a is clogged with dust. It is preferable that the size does not occur. Further, the shape of the discharge port 18a of the nozzle 18 is not particularly limited, but is preferably a shape in which water is sprayed over the entire test roller 11A. For example, the shape of the discharge port 18a of the nozzle 18 may be a slit shape extending in the horizontal direction.

  The pump 20 collects water accumulated at the bottom of the main body 3 and supplies the water to the nozzle 18. Specifically, the pump 20 collects water stored through the collection slope 19 from the opening 14 a of the bottom portion 14, and supplies the water to the nozzle 18 via the pipe 21. In order to allow water accumulated in the bottom portion 14 to flow through the opening portion 14a to the recovery slope 19, the bottom portion 14 may be provided with an inclination so that the opening portion 14a is lowest. Although the performance of the pump 20 is not particularly limited, the water containing dust can be collected without delay, and the water sprayed from the nozzle 18 can fly toward the inside of the test container 200 and can sufficiently maintain a certain discharge pressure. It is preferable that the pump 20 has performance. 7 and 8, the pump 20 is provided on the outer wall portion of the main body 3, but the installation position of the pump 20 is not particularly limited as long as water can be supplied to the nozzle 18.

  The configuration of the test apparatus 100 according to the second embodiment of the present invention has been described above. With this configuration, water can be sprayed from the nozzle 18 toward the inside of the test container 200. The sprayed water passes through the opening 14 a of the bottom 14 and the recovery slope 19 and is recovered by the pump 20. The recovered water is supplied to the nozzle 18 and sprayed again toward the inside of the test container 200. That is, the water stored inside the test container 200 circulates through the test apparatus 100.

  When water is sprayed from the nozzle 18, the dust sprayed inside the test container 200 by the fan 13 also circulates. The dust sprayed inside the test container 200 is taken into water and collected by the pump 20. Thereafter, the water taken into the dust is discharged from the nozzle 18 as a slurry. Thereby, the operating environment at the time of rain can be reproduced inside the test container 200. That is, it is possible to reproduce an environment in which dust is mixed in raindrops and floats in the space.

  A part of the pipe 21 may be provided with at least three T-shaped pipes and one or a plurality of valves for adjusting the water circulation direction. Thereby, the water sprayed inside the test container 200 can be replaced. Moreover, the other arrangement | positioning method of the piping 21 is not specifically limited.

  Next, examples of the present invention will be described. In order to confirm the effect of the present invention, in this example, the effectiveness of the test result obtained by the roller test apparatus was verified. In addition, the following Examples are only performed in order to verify the effect of this invention, and this invention is not limited to the following Examples.

  As test rollers, test rollers (hereinafter referred to as “roller A” and “roller B”) manufactured by two different manufacturers (manufacturers A and B) were prepared. Each roller according to this embodiment is a return roller. Regarding the dimensions of the roller, the outer diameter is 139.8 (mm) and the roll width is 1300 (mm). Thereafter, both ends of each of the roller A and the roller B were attached to each of the pair of support members. Then, the installation position of the support member was adjusted so that the same load was applied to the roller A and the roller B from the driving roller.

  After the rollers A and B were installed, the test container was sealed with a lid member, and dust was sprayed inside the test container. The raw material of the dust is return mineral dust, and the particle size of the return mineral dust is approximately 1 mm or less. And after rotating a fan and stirring dust inside a test container, rotation of a drive roller was started. The start time of the rotation of the roller A and the roller B accompanying the rotation of the drive roller was taken as the test start time. During the test, the shaft temperature and the vibration value were measured by a thermometer installed on the support shaft of each roller and a vibration sensor installed on the support member.

  The test apparatus operated continuously day and night. The test was continuously performed for about 2500 hours from the start of the test until the abnormal noise was detected from the test apparatus.

  FIG. 9 is a graph showing changes in shaft temperature and vibration value related to each roller. In the graph shown in FIG. 9, a curve 1001 indicates the vibration value of the roller A, a curve 1002 indicates the vibration value of the roller B, a curve 1011 indicates the shaft temperature of the roller A, and a curve 1012 indicates the shaft temperature of the roller B. As shown in the graph of FIG. 9, the vibration value 1002 of the roller B shows a constant value until the end of the test, but the vibration value 1001 of the roller A shows a sudden change after 2200 hours after the start of the test. Yes. In addition, the difference between the shaft temperature 1011 of the roller A and the shaft temperature 1012 of the roller B increases after 2200 hours from the start of the test. Therefore, it is considered that the roller A is broken at the point of 2200 hours after the start of the test.

  After completion of the test, the present inventors investigated the state of breakage of roller A and roller B, particularly the state of the bearings of each roller. As a result, for one of the two bearings of the roller A, the bearing was dropped from the bearing cage, and the inside of the bearing and the bearing ring of the bearing was contaminated with dust. As for the other bearing, no bearing was dropped, but it was confirmed that the inside of the bearing ring was contaminated. On the other hand, the roller B bearing was not damaged, and the degree of contamination by dust was slight compared to the roller A bearing. From the above results, it was shown that the intrusion of dust into the bearing caused the bearing to be damaged. This is considered to be because the lubrication failure of the bearing occurs due to the dust entering the inside of the bearing.

  As described above, from the results of this example, it has been shown that by using the test apparatus according to the above-described embodiment, it is possible to reproduce the intrusion of dust into the bearing, which is the cause of the roller breakage. In addition, it was shown that the damage state of the roller can be grasped by measuring the vibration value and the shaft temperature.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, the roller testing method shown in the above embodiment is performed using the roller testing apparatus according to the above embodiment, but the present invention is not limited to this example. For example, at least a pair of support members are provided inside a sealed test container, the test roller is supported by using the support members, and the driving roller is brought into contact with the test roller supported by the support member. If it is possible to rotate the test roller while applying a load to the test roller using the drive roller while stirring the dust scattered inside on the inside of the test container using a blower mechanism such as a fan The configuration of the roller testing apparatus according to the embodiment is not limited.

  Moreover, although the roller testing apparatus shown in the above embodiment is used for evaluating the life of the return roller and the carrier roller, the present invention is not limited to such an example. For example, the roller testing apparatus shown in the above embodiment can also be applied to an evaluation test of the life of other rollers constituting a belt conveyor disposed in a dust environment.

DESCRIPTION OF SYMBOLS 1,100 Test apparatus 2,200 Test container 3 Main body 4 Lid member 4A Sealing material 5 Support member 6 Drive roller 7 Motor 8 Drive belt 9 Intermediate pulley 10 Drive pulley 11 Test roller 12 Holding part 13 Fan 14 Bottom 15 Arm 16 Support shaft 17 Counterweight 18 Nozzle 18a Discharge port 19 Recovery slope 20 Pump 21 Piping 50 Vibration sensor

Claims (10)

A sealable test container;
At least a pair of support members provided inside the test container and supporting both ends of the test roller;
A driving roller provided at a position in contact with the test roller supported by at least the pair of support members inside the test container, and rotating the test roller while applying a load to the test roller;
A blower mechanism for stirring the dust dispersed inside the test container inside the test container;
A roller testing apparatus comprising: When two test rollers are provided,
2. The roller testing apparatus according to claim 1, wherein the two pairs of support members are arranged in parallel at positions where the two test rollers are symmetrical with respect to a vertical plane passing through the rotation axis of the drive roller.   The roller testing apparatus according to claim 1, wherein the pair of support members are provided so as to be movable in a direction parallel to a rotation axis of the drive roller. The blower mechanism has two blowers,
The roller test apparatus according to claim 1, wherein the two blowers are respectively provided at diagonal positions inside the test container. The test container is
A main body with an opening formed at the top;
A lid member that is provided with the drive roller, is supported by an arm, and rotates around a horizontal axis provided in the arm to open and close the opening of the main body;
Consisting of
The roller testing apparatus according to claim 1, wherein the arm is provided with a counterweight on the opposite side of the lid member with respect to the horizontal axis.   The roller testing apparatus according to claim 1, further comprising a measurement mechanism that measures data related to the test roller under test.   The roller testing apparatus according to claim 6, wherein the data related to the test roller is at least one of a vibration value of the test roller and an axial temperature of the roller. A nozzle for spraying water to the inside of the test container;
A pump for collecting the water collected at the bottom of the test container and supplying the water to the nozzle;
The roller testing apparatus according to claim 1, further comprising:   The roller test apparatus according to claim 1, wherein the test roller includes a carrier roller or a return roller. The test roller is supported using at least a pair of support members provided inside the sealable test container,
A driving roller is brought into contact with the test roller supported by at least the pair of support members;
Rotating the test roller while applying a load to the test roller using the driving roller while stirring the dust sprayed inside the test container inside the test vessel sealed using a blower mechanism, Roller test method.

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