JP6790635B2 - Roller test equipment and roller test method - Google Patents

Description

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

Rollers such as carrier rollers or return rollers of the belt conveyor are damaged by the adhesion of dust scattered from the raw materials such as ore carried by the belt conveyor or the wear caused by the dust. For example, the following Non-Patent Document 1 discloses an inspection method regarding the appearance, dimensions, and materials of a roller for a belt conveyor, but does not particularly specify an evaluation regarding the life of the roller during operation. The cause of roller failure depends on the operating environment of the belt conveyor that has the roller, and the roller manufacturer or the manufacturer's own standards are set according to each operating environment.

One of the causes of failure of the rollers of the belt conveyor is damage to the bearings of the rollers. Bearing damage is said to occur when dust that has entered from the outside of the bearing passes through the seal and adheres 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 bearings. Therefore, since a large amount of dust enters the bearing, the roller may be damaged in a time shorter than the expected life of the roller. That is, in an environment where dust is easily scattered and scattered, it is considered that the high sealing property of the bearing affects the life of the roller.

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

Japanese Unexamined Patent Publication No. 11-23422

JIS B 8803, "Roller for Belt Conveyor"

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

Therefore, 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. Is to provide the test equipment of.

In order to solve the above problems, according to a certain aspect of the present invention, a sealable test container, at least a pair of support members provided inside the test container and supporting both ends of the test roller, and the test container. It is provided inside the test roller at least at a position where it comes into contact with the test roller supported by the pair of support members, and is sprayed inside the test container and a drive roller that rotates the test roller while applying a load to the test roller. The test container is provided with a ventilation mechanism for agitating the dust inside the test container, and the test container is provided with a main body having an opening formed at the upper portion and the drive roller provided on the arm and supported by the arm. It is composed of a lid member that opens and closes the opening of the main body by rotating around the horizontal axis, and the arm is provided with a counter weight on the opposite side of the lid member with respect to the horizontal axis. Roller test equipment is provided.

When two test rollers are provided, even if the pair of support members are arranged side by side at positions symmetrical with respect to the vertical plane where the two test rollers pass through the rotation axis 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 has two blowers, and the two blowers may be provided at diagonal positions inside the test container.

The roller test apparatus may further include a measuring mechanism for measuring data about the test roller under test.

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

The roller test apparatus further includes a nozzle for spraying water on the inside of the test container, and a pump for collecting the water collected on the bottom of the test container and supplying the water to the nozzle. May be good.

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

Further, in order to solve the above problems, according to another aspect of the present invention, there is a roller test method using the roller test device, and at least a pair of supports provided inside a sealable test container. The test roller was supported by the member, the drive roller was brought into contact with the test roller supported by at least the pair of support members, and the dust scattered inside the test container was sealed by using a blower mechanism. Provided is a roller test method in which the test roller is rotated while applying a load to the test roller by using the drive roller while stirring inside the test container.

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

It is a schematic block diagram which shows an example of the test apparatus which concerns on 1st Embodiment of this invention. It is the schematic which shows an example of the opening and closing operation of a lid member by rotation of an arm which concerns on the same embodiment. It is a graph which shows the relationship of the load applied to the test roller with respect to the weight of the counterweight which concerns on the same embodiment. It is a schematic diagram which shows the arrangement example of the support member and a fan inside the test container which concerns on the same embodiment. It is the schematic which shows the 1st modification about the arrangement of the support member inside the test container which concerns on this embodiment. It is the schematic which shows the 2nd modification about the arrangement of the support member inside the test container which concerns on this embodiment. It is a schematic block diagram which shows an example of the test apparatus which concerns on 2nd Embodiment of this invention. It is a figure which shows an example of the schematic structure in the plan view of the test container which concerns on the same embodiment. It is a graph which shows the change of the shaft temperature and the vibration value concerning each roller.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

<< 1. First Embodiment >>
<1.1. Configuration>
FIG. 1 is a schematic configuration diagram showing an example of the 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 which is a test tank and a lid member 4, a support member 5 (5A, 5B), a drive roller 6, a motor 7, and a drive. It includes 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. 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. Further, a sealing material 4A is provided on the upper part of the main body 3 according to the present embodiment. The main body 3 comes into contact with the lid member 4 via the sealing material 4A. As the sealing material 4A, a known sealing material such as packing is used. Further, the sealing material 4A may be provided on the lid member 4 instead of the main body 3. 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 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 portion 12. At this time, the support member 5 is adjusted so that the height of the test roller 11 abuts on the drive roller 6 (position in the Z-axis direction). As a result, the test roller 11 can receive the load and the rotational force from the drive roller 6. The structure of the holding portion 12 is not particularly limited as long as it can hold the support shaft of the test roller 11.

In the present embodiment, one or two sets of the pair of support members 5 are provided. That is, the test device 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 sets of support members 5A and 5A support the test rollers 11A and 11A, respectively. An example of arranging the pair of support members 5 will be described later.

The drive 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 drive roller 6 receives the drive force generated by the motor 7 via a drive pulley 10 having the same rotation axis, and uses the drive force to drive the test roller 11. Rotate. The driving force is transmitted to the drive pulley 10 via the drive belt 8. The intermediate pulley 9 is provided to increase the tension applied to the drive belt 8 in the drive direction. This improves the transmission efficiency of the driving force.

The total load applied to the test roller 11 by the drive roller 6 is about 0 to 4 kN. 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 about 1.5 to 3 times the load applied to the rollers during the actual operation of the belt conveyor. Further, the rotation speed related to the rotation of the test roller 11 by the drive roller 6 can also be set to be larger than that during the 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 of the test roller 11 in the operating environment can be evaluated in a short time.

Further, the drive roller 6 according to the present embodiment is provided inside the lid member 4. When the test container 2 is sealed by the lid member 4 coming into contact with the main body 3, the drive roller 6 applies a predetermined load to the test roller 11. On the other hand, when the test container 2 is in the open state, the drive roller 6 follows the lid member 4, so that the drive roller 6 separates from the test roller 11. As a result, the test roller 11 can be installed or removed.

Further, the drive roller 6 and the drive pulley 10 according to the present embodiment are supported by the arm 15. FIG. 2 is a schematic view showing an example of an opening / closing operation of the lid member 4 by 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 part of the main body 3.

Further, a counterweight 17 is provided on the opposite side of the lid member 4 in the arm 15. When the weight of the counterweight 17 is adjusted, the load applied to the test roller 11 of the drive roller 6 provided on the lid member 4 changes according to the principle of leverage as shown in FIG. For example, increasing the weight of the counterweight 17 reduces the load of the drive roller 6 on the test roller 11. By adjusting the weight of the counterweight 17 in this way, it is possible to adjust the load of the drive roller 6 applied to the test roller 11.

FIG. 3 is a graph showing the relationship between the weight of the counterweight 17 and the load applied to the test roller 11. As shown in the graph of FIG. 3, it can be seen that as the weight of the counterweight 17 is increased, the load of the drive roller 6 applied to the test roller 11 decreases linearly. Therefore, the load of the drive 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 the present embodiment, the load of the drive 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 this example. For example, the load of the drive roller 6 may be adjusted by suspending the weight directly on the drive roller 6 or pulling the lid member 4 provided with the drive roller 6 vertically upward.

Further, the shape of the arm 15 is not particularly limited. The arm 15 according to the present embodiment is composed of two beams extending in parallel, and the lid member 4 has two beams so that the accommodating portion of the drive roller 6 of the lid member 4 is located between the two beams. Supported by the beam. As a result, the lid member 4 can be rotated stably. Further, in this case, the counter weight 17 is provided so as to bridge the two beams. As a result, it is possible to suppress the uneven distribution of the load of the drive roller 6 applied to the test roller 11 in the Y-axis direction.

The fan 13, which is an example of the blower constituting the blower mechanism, is provided inside the test container 2. As shown in FIG. 2, the fan 13 has a function of stirring dust scattered inside the test container 2 inside the test container 2. The fan 13 will be described as an example of the blower according to the present embodiment, but the blower is not limited to the fan. For example, the blower mechanism is not particularly limited as long as it is a fluid machine that agitates 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 adopted as the blower because it is sufficient to have the ability to disperse the dust inside the test container 2.

The fan 13 is preferably provided near the bottom of the test container 2 in order to efficiently agitate the dust accumulated in the bottom 14 inside the test container 2. Further, the number of fans 13 may be one or more. For example, as will be described in detail later, it is preferable that two fans 13 are provided at diagonal positions of the test container 2 in the horizontal direction. As a result, the dust can be agitated inside the test container 2 more efficiently.

Further, the dust scattered inside the test container 2 is preferably the dust of the raw material existing in the actual operating environment of the belt conveyor. This is because the test environment can be more simulated to the actual operating environment. Therefore, it is preferable that the type of dust is a raw material that can be actually transported by the belt conveyor. The raw material is, for example, iron ore, sinter, coke, coal, lime and the like. Further, even when the transported object itself of the belt conveyor such as gravel or crushed glass (cullet) is powder, the raw material can be dust according to the present embodiment. The particle size of the dust used in the test apparatus 1 according to the present embodiment is not particularly limited, but is preferably about 10 μm to 1000 μm, which is the particle size range of the dust existing in the actual operating environment.

The above-mentioned dust is sprayed inside the test container 2 before the start of the test by the test apparatus 1. For example, when the lid member 4 of the test container 2 is removed, the dust may be thrown in from above the main body 3. Further, the main body 3 or a part of the lid member 4 may be provided with an input port for charging dust. The size of the charging port may be large enough to charge the dust inside the test container 2. As a result, it is possible to prevent the dust that rises when the dust is sprayed inside the test container 2 from leaking to the outside of the test container 2. Further, it is possible to spray dust on the inside of the test container 2 even during the test.

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

From the above, it is possible to evaluate the life of the test roller in an environment close to the actual operating environment by using the test apparatus 1 according to the present embodiment. The test method using the test apparatus 1 makes it possible to establish a roller inspection standard that more reflects the actual operating condition.

<1.2. Example of arrangement of support members and fans>
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 appropriately provided at an optimum position according to the number and type of test rollers 11 to be tested. Further, the fan 13 is provided so that the dust scattered inside the test container 2 can be dispersed as much as possible in the space inside the test container 2.

FIG. 4 is a schematic view showing an arrangement example of the support member 5 and the fan 13 inside the test container 2 according to the present embodiment. Note that FIG. 4 is a cross-sectional view of the test container 2 at the IV-IV cutting line shown in FIG.

The example shown in FIG. 4 is an arrangement example of the support member 5A and the test roller 11A when the test is performed on two rollers in one test. As shown in FIG. 4, in the XY plane (horizontal plane), the test rollers 11A and 11A are positioned symmetrically with respect to the vertical plane passing through the rotation axis (dashed line) of the driving roller 6 (dashed line). Two pairs of support members 5A are arranged side by side. At this time, the support member 5A holds the support shaft 102 of the test roller 11A extending 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 evenly receive the load from the drive roller 6. Therefore, it is possible to test two rollers under the same conditions in one test. This makes it possible, for example, to perform a comparative test of performance regarding the lifespan of two different rollers.

Further, as shown in FIG. 4, two fans 13 according to the present embodiment are provided, and each of them is provided at a diagonal position of the main body 3. Further, the blowing directions of the fans 13 are opposite to each other along the X-axis direction and along the inner wall of the main body 3. As a result, as shown in FIG. 4, the stirring direction of the dust becomes 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.

Although the shape of the main body 3 according to the present embodiment on the XY plane is rectangular, the present invention is not limited to such an example. For example, when the shape of the main body 3 in the XY plane is a circle or an ellipse, the two fans 13 are oriented so that the blowing directions are opposite to each other and along the inner wall of the main body 3 at the position farthest from the inner wall of the main body 3. It is preferable that it is provided so as to be. As a result, dust can be dispersed as much as possible in the space inside the main body 3.

Further, the arrangement of the support member 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 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 the test is performed on one roller in one test. As shown in FIG. 5, the support member 5B is provided at a position where the test roller 11B is vertically below the drive roller 6. As a result, the same test can be performed on one test roller 11B. Although the support member 5B in this modification is a member different from the support member 5A, even if 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 portion 12 of the support member 5A has an adjustable support height with respect to the holding portion 12 of the test roller 11A.

Further, the test roller 11 shown in FIGS. 4 and 5 is a return roller, but the present invention is not limited to such an example. For example, the test apparatus 1 according to the present embodiment can also be applied to a carrier roller. FIG. 6 is a schematic view showing a second modification 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 on two carrier rollers in one test. As shown by the arrow in FIG. 6, the pair of support members 5A are provided so as to be movable in a direction parallel to the rotation axis of the drive roller 6. For example, as shown in FIG. 6, in the case of the carrier roller 11C having a diameter in the longitudinal direction (Y-axis direction) shorter than that of the return roller, the pair of support members 5A are provided at positions close to each other. As a result, even 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. In addition, different members may be used for the support member for supporting the return roller and the support member for supporting the carrier roller.

<1.3. Test data>
Next, the data measured by the test apparatus 1 according to the present embodiment and the sensor used for acquiring the measurement data will be described. It is considered that the state of the test roller 11 tested by the test apparatus 1 according to the present embodiment changes sequentially during the test. Therefore, it is preferable that the test apparatus 1 is provided with a measuring mechanism for measuring data regarding the test roller 11 under test.

The measuring mechanism may be, for example, a vibration sensor for measuring the vibration of the test roller 11. 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 the vibration value. This vibration value shows a value at a constant cycle 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.

Further, the measuring 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 indicates a constant cycle value when no abnormality occurs during the test. However, when the bearing is damaged or the like, the lubrication effect of the bearing is reduced, so that the temperature of the bearing rises due to friction. Since this 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 measuring 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 temperature and current values can also change at the timing of failure of the test roller 11.

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

The information processing device described above acquires data output from each measurement mechanism and stores it in a storage device or the like. The stored data may be output to the outside by an output device such as a display or a printer. Thereby, data regarding the test roller 11 under test can be obtained. That is, it is possible to quantitatively evaluate the life of the test roller 11 in an environment close to the actual operating environment. Further, the information processing apparatus may perform control according to the value indicated by the accumulated data (for example, control to output a warning when the data indicates an abnormal value). As a result, when an abnormality occurs during the test, it is possible to take measures such as stopping the test 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, the 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 showing an example of the 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 which are test tanks, support members 5 (5A and 5B), drive rollers 6, motors 7, and drives. It includes 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. Further, 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. Further, an opening 14a is further provided in a part or all of the bottom portion 14 of the main body 3. Further, FIG. 8 is a diagram showing an example of a schematic configuration of the test container 200 according to the present embodiment in a plan view. Hereinafter, each component will be described with reference to FIGS. 7 and 8. Of the components of the test device 100 according to the present embodiment, the components common to the test device 1 according to the first embodiment will not be described.

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 on the inside of the test container 200. Therefore, the nozzle 18 is provided so that the discharge port 18a of the nozzle 18 faces the inside of the main body 3. Further, 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 side by side on the inner wall of the main body 3 along the longitudinal direction (Y-axis direction) of the test roller 11A. This makes it easier for water to be sprayed over the entire 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 is such that it does not occur. Further, the shape of the discharge port 18a of the nozzle 18 is not particularly limited, but it is preferable that the shape is such that 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 the water accumulated at the bottom of the main body 3 and supplies the water to the nozzle 18. Specifically, the pump 20 collects the stored water from the opening 14a of the bottom portion 14 through the recovery slope 19, and supplies the water to the nozzle 18 via the pipe 21. In order to allow the water accumulated in the bottom portion 14 to pass through the opening portion 14a and flow to the recovery slope 19, the bottom portion 14 may be provided with an inclination so that the opening portion 14a is the lowest. The performance of the pump 20 is not particularly limited, but 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 a certain discharge pressure can be sufficiently maintained. It is preferable that the pump 20 has the performance. Further, in the examples shown in FIGS. 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 such a configuration, water can be sprayed from the nozzle 18 toward the inside of the test container 200. Further, the sprayed water passes through the opening 14a of the bottom portion 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 in the test device 100.

When water is sprayed from the nozzle 18, the dust sprayed inside the test container 200 by the fan 13 also circulates. Then, the dust scattered inside the test container 200 is taken into water and collected by the pump 20. After that, the water taken into the dust is discharged from the nozzle 18 as a slurry. As a result, the operating environment in rainy weather can be reproduced inside the test container 200. That is, it is possible to reproduce an environment in which dust is mixed with 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. As a result, the water sprayed inside the test container 200 can be replaced. Further, the other arrangement method of the pipe 21 is not particularly 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 by the roller test apparatus was verified. The following examples are merely for verifying the effect of the present invention, and the present invention is not limited to the following examples.

As test rollers, test rollers (hereinafter referred to as rollers A and B, respectively) manufactured by two different manufacturers (manufacturer A and manufacturer B) were prepared. Each roller according to this embodiment is a return roller. Regarding the dimensions of the rollers, the outer diameter is φ139.8 (mm) and the roll width is 1300 (mm). Then, both ends of the rollers A and 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 rollers A and B from the drive rollers.

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 dust is approximately 1 mm or less. Then, after rotating the fan to stir the dust inside the test container, the rotation of the drive roller was started. The start time of rotation of rollers A and B accompanying the rotation of the drive roller was set as the test start time. During the test, the shaft temperature and 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 equipment operated continuously day and night. From the start of the test to the detection of abnormal noise from the test device, the test was continuously performed for about 2500 hours.

FIG. 9 is a graph showing changes in the shaft temperature and the vibration value related to each roller. In the graph shown in FIG. 9, the curve 1001 shows the vibration value of the roller A, the curve 1002 shows the vibration value of the roller B, the curve 1011 shows the shaft temperature of the roller A, and the curve 1012 shows 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 rapid change after 2200 hours after the start of the test. There is. Further, the deviation between the shaft temperature 1011 of the roller A and the shaft temperature 1012 of the roller B becomes large after 2200 hours after the start of the test. Therefore, it is considered that the roller A is damaged at 2200 hours after the start of the test.

After the test was completed, the present inventors investigated the damage state of rollers A and B, particularly the state of bearings of each roller. As a result, for one of the two bearings of the roller A, the bearing had fallen off from the cage of the bearing, and the inside of the bearing and the raceway ring of the bearing was contaminated with dust. Regarding the other bearing, the bearing did not fall off, but it was confirmed that the inside of the raceway ring was contaminated. On the other hand, the bearing of the roller B was not damaged, and the degree of contamination by dust was minor as compared with the bearing of the roller A. From the above results, it was shown that the intrusion of dust into the bearing caused damage to the bearing. It is considered that this is because the dust enters the inside of the bearing and causes poor lubrication of the bearing.

As described above, from the results of this embodiment, it has been shown that by using the test apparatus according to the above embodiment, it is possible to reproduce the intrusion of dust into the bearing, which is the cause of damage to the rollers. It was also shown that it is possible to grasp the damaged state of the rollers by measuring the vibration value and the shaft temperature.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person having ordinary knowledge in the field of technology to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. , These are also naturally understood to belong to the technical scope of the present invention.

For example, the roller test method shown in the above embodiment has been carried out using the roller test apparatus according to the above embodiment, but the present invention is not limited to such an example. For example, at least a pair of support members are provided inside the sealed test container, the test roller is supported by the support member, and the drive roller is brought into contact with the test roller supported by the support member to bring the test container into contact with the test roller. 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 using a ventilation mechanism such as a fan inside the test container, the above implementation is performed. The configuration of the roller test apparatus according to the form is not limited.

Further, although the roller test 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 test apparatus shown in the above embodiment can be applied to an evaluation test of the life of other rollers constituting a belt conveyor arranged in a dust environment.

1,100 Test equipment 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 (9)

With 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 drive roller provided inside the test container at a position where it comes into contact with the test roller supported by at least the pair of support members and rotates the test roller while applying a load to the test roller.
A ventilation mechanism that agitates the dust scattered inside the test container inside the test container, and
Equipped with a,
The test container is
The main body with an opening at the top and
A lid member provided with the drive roller, supported by the arm, and rotated around a horizontal axis provided on the arm to open and close the opening of the main body.
Consists of
It said arm, opposite the test device of the counterweights that provided rollers of the cover member relative to the horizontal axis. When two test rollers are provided,
The roller test apparatus according to claim 1, wherein the pair of support members are arranged side by side at positions symmetrical with respect to a vertical plane in which the two test rollers pass through the rotation axis of the drive roller. The roller test apparatus according to claim 1 or 2, wherein the pair of support members are provided so as to be movable in a direction parallel to the rotation axis of the drive roller. The blower mechanism has two blowers.
The roller test apparatus according to any one of claims 1 to 3, wherein the two blowers are provided at diagonal positions inside the test container, respectively. The roller test apparatus according to any one of claims 1 to 4 , further comprising a measuring mechanism for measuring data relating to the test roller under test. The roller test apparatus according to claim 5 , wherein the data regarding the test roller is at least one of the vibration value of the test roller and the shaft temperature of the roller. A nozzle for spraying water on the inside of the test container,
A pump that collects the water that collects at the bottom of the test container and supplies the water to the nozzle.
The roller test apparatus according to any one of claims 1 to 6 , further comprising. The roller test apparatus according to any one of claims 1 to 7 , wherein the test roller includes a carrier roller or a return roller. A roller test method using the roller test apparatus according to any one of claims 1 to 8.
The test roller is supported by using at least a pair of support members provided inside the sealable test vessel.
The drive roller is brought into contact with the test roller supported by at least the pair of support members.
The test roller is rotated while applying a load to the test roller by using the drive roller while stirring the dust scattered inside the test container inside the test container sealed by using a ventilation mechanism. Roller test method.

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