JP2016090417A - Device and method for wear test - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for wear test capable of accurately predicting a wear resistance of a conveyor belt when actually used.SOLUTION: A device and method for wear test sets a travelling speed of an annular belt sample B stretched between pulleys 7 a and 7 b to a desired speed; sets a pressing load due to a contact member 4 to a desired pressing load by a weight member 5; selects a desired contact member 4 from a plurality of kinds of contact members 4 a, 4 b, and 4 c different in specification of the contact surface contacting the surface of the belt sample B provided as the contact member 4; and detects a pressing direction displacement amount of the contact member 4 pressing the surface of the belt sample B attached to an arm part 3 constituting a pressing mechanism and causing the pulley 7a to be rotated and by putting the contact member 4 into movable state in the travelling direction of the annular belt sample B stretched between the pulleys 7 a and 7 b and pressing the surface of the belt sample B by a displacement sensor 9a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wear test apparatus and method, and more particularly to a wear test apparatus and method that can accurately predict the wear resistance of an upper cover rubber of a conveyor belt in actual use.

  Various objects including mineral resources such as iron ore and limestone are conveyed by a conveyor belt. When an object is conveyed by the conveyor belt, the conveyed object is put into the upper cover rubber of the conveyor belt from a hopper or another conveyor belt. The loaded conveyed product is loaded on the upper cover rubber and conveyed in the running direction of the conveyor belt. When a conveyed product is thrown into the upper cover rubber of the conveyor belt, the upper cover rubber receives an impact, and if the surface of the conveyed product is sharp, cut scratches may occur. When the conveyed product is loaded on the upper cover rubber and conveyed, the conveyed item slides on the upper cover rubber and the upper cover rubber is worn. Therefore, conventionally, various proposals have been made to improve wear resistance (see, for example, Patent Document 1).

  The amount of wear generated on the upper cover rubber greatly varies depending on the usage environment of the conveyor belt (including the type of the conveyed product). Therefore, in order to accurately predict the wear resistance of the upper cover rubber, it is preferable to perform evaluation under conditions that are as similar as possible to the actual use environment. Therefore, it is required that the test apparatus that performs the evaluation can be set to a condition that is consistent with various usage environments of the conveyor belt.

  Conventionally, a DIN abrasion tester and a Williams abrasion tester are known as testers for evaluating the wear resistance of rubber. However, these wear testers are intended to grasp the wear resistance under a predetermined condition set in advance. For this reason, it is impossible to set the conditions consistent with various usage environments of the conveyor belt, and there is a problem that it is difficult to accurately predict the wear resistance of the upper cover rubber of the conveyor belt in actual use.

JP 2001-88922 A

  An object of the present invention is to provide a wear test apparatus and method capable of accurately predicting the wear resistance of an upper cover rubber of a conveyor belt in actual use.

  In order to achieve the above object, a wear test apparatus of the present invention comprises a pair of pulleys, a contact member that can contact the surface of an annular belt sample stretched between the pair of pulleys, and the contact member as the belt. A pressing mechanism that presses against the surface of the sample; a weight member that changes a pressing load applied by the contact member; and a displacement sensor that detects a displacement amount in the pressing direction of the contact member pressing the surface of the belt sample. The belt sample has a variable traveling speed and has, as the contact member, a plurality of types of contact members having different specifications of a contact surface that contacts the surface of the belt sample. A contact member that presses the surface of the belt is arbitrarily selected, and the selected contact member is made movable in the running direction of the belt sample. Characterized in that the arrangement for pressing the pull of the surface.

  The wear test method of the present invention is a wear test method in which an annular belt sample is stretched between a pair of pulleys, and a contact member is pressed against the surface of the belt sample by a pressing mechanism. The belt sample is set to a desired traveling speed, the pressing load by the contact member is set to a desired pressing load by a weight member, and is in contact with the surface of the belt sample provided as the contact member. A desired contact member is selected from a plurality of types of contact members having different contact surface specifications, the selected contact member is made movable in the running direction of the belt sample, pressed against the surface of the belt sample, and the belt A displacement sensor detects a displacement in the pressing direction of the contact member pressing the surface of the sample.

  According to the present invention, the traveling speed of the belt sample and the pressing load by the contact member can be set to desired settings. And the contact member which has a contact surface of desired specification can be pressed on the surface of the said belt sample. At that time, the contact member can be moved in the running direction of the belt sample and pressed against the surface of the belt sample. In addition, since an annular belt sample is used, when testing the wear resistance of a belt sample with the same specifications as the rubber used for the upper cover rubber of the conveyor belt, the conditions are similar to the actual usage environment of the conveyor belt. It becomes possible to evaluate with. Therefore, it is possible to accurately predict the wear resistance of the upper cover rubber of the conveyor belt in actual use. In addition, the influence of tension on the wear resistance of the conveyor belt can be grasped.

  Also, a support roller for supporting the inner peripheral surface of the belt sample is provided between the pair of pulleys, and the contact member is arranged at a position where the support roller supports the belt sample and a position where the belt sample is not supported. By pressing the surface of the belt sample, the influence of the support roller on the wear resistance can be grasped. Therefore, the wear resistance of the upper cover rubber of the conveyor belt in actual use can be predicted with higher accuracy.

  Further, by detecting the displacement in the pressing direction of the contact member pressing the surface of the belt sample with a displacement sensor, not only the relationship between the pressing load and the wear amount but also the pressure deformation amount and the wear amount of the belt sample. To understand the relationship. That is, the relationship between the deformation state of the belt sample and the wear amount can be grasped.

  Here, the wear test apparatus of the present invention may include a load sensor that sequentially detects the pressing load acting on the contact member and the running direction load of the belt sample. This makes it possible to grasp the dynamic friction coefficient of the belt sample.

  A casing for changing the external environmental temperature of the belt sample may be provided. Thereby, since the external environmental temperature of a belt sample can be set to desired temperature, it becomes possible to evaluate on the conditions similar to the actual use environment of a conveyor belt.

  A temperature sensor that detects the surface temperature of the belt sample can also be provided. Thereby, the surface temperature change of the belt sample under evaluation can be measured, and the energy generated when the belt sample is worn can be grasped.

  The pressing mechanism includes, for example, an arm portion to which the contact member is attached, and the other end portion in the longitudinal direction thereof is pivotally supported by a rotation shaft. The arm portion is pressed by the weight member, and the rotation shaft is The arm portion is configured to be rotatable in the vertical direction around the center.

It is explanatory drawing which illustrates the abrasion test apparatus of this invention by a front view. It is explanatory drawing which illustrates the abrasion test apparatus of FIG. 1 by a side view. It is explanatory drawing which shows another embodiment of an abrasion test apparatus by a front view. It is explanatory drawing which simplifies and illustrates a conveyor belt line. It is AA sectional drawing of FIG.

  The wear test apparatus and method of the present invention will be described below based on the embodiments shown in the drawings.

  In the actual conveyor belt line, as illustrated in FIGS. 4 and 5, the conveyed product S conveyed by another conveyor belt 17 is input to the conveyor belt 11 and conveyed to the conveyance destination by this conveyor belt 11. . The conveyed product S may be put into the conveyor belt 11 through a hopper or the like. The conveyor belt 11 is stretched between pulleys 15a and 15b and is stretched with a predetermined tension.

  The conveyor belt 11 is composed of a core body layer 12 composed of a core body such as a canvas or a steel cord, and an upper cover rubber 13 and a lower cover rubber 14 sandwiching the core body layer 12. The core body layer 12 is a member that bears tension for tensioning the conveyor belt 11. The lower cover rubber 14 is supported by the support roller 16 on the carrier side of the conveyor belt 11, and the upper cover rubber 13 is supported by the support roller 16 on the return side. Three support rollers 16 are arranged in the belt width direction on the carrier side of the conveyor belt 11, and the conveyor belt 11 is supported in a concave shape at a predetermined trough angle a by these support rollers 16. When the driving pulley 15a is rotationally driven, the conveyor belt 11 operates in one direction at a predetermined traveling speed V1. The conveyed product S is put on the upper cover rubber 13, loaded on the upper cover rubber 13, and conveyed.

  The wear test apparatus 1 of the present invention illustrated in FIGS. 1 to 2 includes pulleys 7 a and 7 b, a contact member 4, an arm portion 3 to which the contact member 4 is detachably attached, and a detachable to the arm portion 3. A weight member 5 to be attached, a control unit 6a, and a displacement sensor 9a are provided. Furthermore, in this embodiment, the support roller 16, the load sensor 9b, the temperature sensor 9c, and the casing 10 in which the above-described components except the control unit 6a are provided are provided.

  The casing 10 can maintain the internal space at a desired temperature. In addition to the temperature, the casing 10 that can maintain the internal space at a desired humidity can be employed.

  The pulleys 7a and 7b are rotatably supported by a support base 8 provided upright on the base 2a. At least one of the pulleys 7a and 7b moves horizontally, and the distance between the pulleys 7a and 7b is variable. One pulley 7 a is rotationally driven by the drive motor 6. The other pulley 7b rotates freely. The rotation speed of the pulley 7a is variable and can be set to a desired rotation speed. This rotational speed is controlled by the controller 6a. The pulley 7a and the drive motor 6 can be configured to transmit driving force by a transmission mechanism such as a gear or a belt.

  An annular belt sample B is stretched between the pulleys 7a and 7b. In this embodiment, a support roller 16 that supports the inner peripheral surface of the belt sample B is provided between the pulley 7a and the pulley 7b. The support roller 16 is optionally provided as necessary.

  The arm portion 3 is pivotally supported by a rotation shaft 3b so as to be rotatable in the vertical direction with respect to a post 2b erected on the base 2a. A weight member 5 is attached to one end of the arm portion 3 in the longitudinal direction. The other end in the longitudinal direction of the arm portion 3 is pivotally supported by a rotating shaft 3b that is inserted into a holding elongated hole 2c that is formed in the post 2b and extends in the horizontal direction. Therefore, the arm part 3 is movable to some extent in the horizontal direction (traveling direction of the belt sample B). The arm portion 3 constitutes a pressing mechanism that presses the contact member 4 against the surface of the belt sample B as will be described later. In this embodiment, two holding elongated holes 2c are provided at the same height position and shifted in the horizontal direction. The holding slot 2c can be singular or plural.

  The contact member 4 is attached to the arm portion 3 at a position so as to be able to contact the surface of the belt sample B. More specifically, the contact member 4 is detachably attached to the holding portion 3a fixed to one end portion of the arm portion 3 in the longitudinal direction.

  As the contact member 4, a plurality of types having different specifications (shape, hardness, material, surface roughness, etc.) of the contact surface that contacts the surface of the belt sample B are provided. That is, a contact member 4 (4a, 4b, 4c) having a contact surface with a specification similar to the surface of the conveyed product S conveyed by the conveyor belt 11 having the same specification as the belt sample B is provided.

  For example, since the sharpness, hardness, etc. differ depending on whether the conveyed product S is iron ore, limestone, or earth and sand, a plurality of types of contact members 4 having contact surfaces similar to these are provided. An arbitrary contact member 4 is selected from a plurality of types of contact members 4 (4a, 4b, 4c) and attached to the holding portion 3a.

  The weight member 5 includes a plurality of weight members 5 having different weights, and is detachably attached to one longitudinal end portion of the arm portion 3. When one end portion in the longitudinal direction of the arm portion 3 is pressed by the weight member 5, the arm portion 3 rotates in the vertical direction around the rotation shaft 3b located at the other end portion in the longitudinal direction of the arm portion 3. Along with this, the contact member 4 presses the surface of the belt sample B. Thus, although the arm part 3 comprises the pressing mechanism, if the contact member 4 can be pressed on the surface of the belt sample B, another pressing mechanism can be employ | adopted.

  The weight member 5 only needs to change the pressing load applied to the belt sample B by the contact member 4. That is, the pressing force of the contact member 4 against the surface of the belt sample B can be changed depending on the weight of the weight member 5.

  The displacement sensor 9a is attached to the post 2b and detects the amount of displacement in the pressing direction of the contact member 4 pressing the surface of the belt sample B. That is, the amount of vertical displacement of the contact member 4 is sequentially detected to detect the deformation state of the pressed belt sample B.

  The load sensor 9 b is attached to the lower surface of one end portion in the longitudinal direction of the arm portion 3. The load sensor 9b sequentially detects the pressing load acting on the contact member 4 and the traveling direction load of the annular belt sample B stretched between the pulleys 7a and 7b. In other words, the vertical load and the horizontal load acting on the contact member 4 pressing the belt sample B are sequentially detected by the load sensor 9b.

  The temperature sensor 9c sequentially detects the surface temperature of the belt sample B. Data detected by the displacement sensor 9a, the load sensor 9b, and the temperature sensor 9c is input to the control unit 6a.

  Next, a test method for evaluating the wear resistance of the belt sample B using the wear test apparatus 1 will be described.

  An annular belt sample B as an evaluation object is stretched between the pulley 7a and the pulley 7b, and the drive motor 6 is rotationally driven. At this time, the belt sample B is stretched with a desired tension by adjusting the distance between the pulleys 7a and 7b. Further, the traveling speed of the belt sample B is set to a desired speed, and the pressing load on the surface of the belt sample B of the contact member 4 by the pressing mechanism is set to a desired pressing load by the weight member 5.

  The contact member 4 selects a desired contact member from a plurality of types of contact members 4 (4a, 4b, 4c) and attaches it to the holding portion 3a. As a result, the desired contact member 4 is pressed against the surface of the belt sample B, and the displacement in the pressing direction of the contact member 4 pressing the surface of the belt sample B is detected by the displacement sensor 9a. In this embodiment, the contact member 4 presses the surface of the belt sample B at a position directly above the support roller 16.

  Since the arm part 3 can move freely in the horizontal direction to some extent, the contact member 4 can be moved in the traveling direction (that is, the horizontal direction) of the annular belt sample B stretched between the pulleys 7a and 7b. Press the surface of Sample B. By making the contact member 4 movable to some extent in the traveling direction of the annular belt sample B stretched between the pulleys 7a and 7b, the transported material S actually put on the conveyor belt 11 is moved. The state can be reproduced more closely. In this manner, the belt sample B is worn while being continuously pressed by the contact member 4 with a predetermined pressing load.

  According to the present invention, the upper cover rubber of the belt sample B to be evaluated can be evaluated under conditions similar to the actual usage environment of the conveyor belt 11. In other words, the traveling speed of the annular belt sample B stretched between the pulleys 7a and 7b is determined by the horizontal speed of the conveyed product S and the horizontal traveling speed of the conveyor belt 11 when the conveyor belt 11 is loaded. Difference, that is, the relative speed in the horizontal direction between the conveyor belt 11 and the loaded material S is set to the same condition. The pressing load by the contact member 4 is set to a condition equivalent to the pressing load received by the conveyor belt 11 from the conveyed object S according to the input weight per unit time of the conveyed object S, the input height, and the like.

  Moreover, since the annular belt sample B is used, the conditions can be made very similar to the actual usage environment of the conveyor belt 11. Therefore, it is possible to accurately predict the wear resistance of the upper cover rubber 13 of the conveyor belt 11 in actual use. The influence of the tension on the wear resistance of the belt sample B can also be grasped.

  Further, by providing a support roller 16 that supports the inner peripheral surface of the belt sample B between the pulleys 7a and 7b, the contact member 4 is positioned at the position where the support roller 16 supports the belt sample B, and the belt sample B is fixed. It can be pressed against the surface of the belt sample B at a position where it is not supported. Thereby, the difference in abrasion resistance of the belt sample B at the two positions can be grasped. Therefore, the wear resistance of the upper cover rubber 13 of the conveyor belt 11 in actual use can be predicted with higher accuracy. In this embodiment, the pressing position by the contact member 4 can be changed by inserting the rotating shaft 3b that pivotally supports the other end in the longitudinal direction of the arm portion 3 into another holding long hole 2c.

  Further, by detecting the displacement in the pressing direction of the contact member 4 pressing the surface of the belt sample B by the displacement sensor 9a, not only the relationship between the pressing load and the wear amount but also the pressing deformation amount of the belt sample B The relationship between the amount of wear can be grasped. That is, the relationship between the deformation state of the belt sample B and the wear amount can be grasped.

  In this embodiment, the pressing load (that is, the vertical load) acting on the contact member 4 and the traveling direction load (that is, the horizontal load) of the annular belt sample B stretched between the pulleys 7a and 7b are sequentially determined. Detect. Therefore, it is possible to grasp the dynamic friction coefficient of the belt sample B based on the detection data.

  In this embodiment, the external environmental temperature of the belt sample B can be set to a desired temperature by the casing 10. Therefore, it becomes possible to perform evaluation under conditions more similar to the actual usage environment of the conveyor belt 11. In addition, the temperature dependence of the wear resistance of the belt sample B can be grasped by performing the evaluation with different external environmental temperatures.

  Moreover, since the temperature sensor 9c is provided, the change in the surface temperature of the belt sample B being evaluated can be measured. Since heat energy is generated when the belt sample B is worn, the energy at the time of wear can be grasped from the temperature measurement result by the temperature sensor 9c. Since the magnitude of this energy varies depending on the type of rubber, the temperature measurement result is useful, for example, in selecting a rubber type that can reduce this energy.

  In another embodiment of the wear test apparatus 1 illustrated in FIG. 3, the support roller 16 that supports the inner peripheral surface of the belt sample B can move in the traveling direction of the belt sample B between the pulley 7 a and the pulley 7 b. It is a mechanism that can be fixed at any position. Other basic configurations are the same as in the previous embodiment. Since the support roller 16 can move, the span (support length of the belt sample B pressed by the contact member 4) can be changed. Therefore, the influence of the span on the wear resistance can also be grasped. In addition, the mechanism which makes the support roller 16 movable is not specifically limited. A mechanism that can move steplessly or a mechanism that can move stepwise may be used. As a mechanism for making the support roller 16 movable, for example, there is a method of setting a rail on the base 2a so that the support roller 16 can slide on the rail.

  The belt sample B has a structure in which the core layer 12 is sandwiched between the upper cover rubber 13 and the lower cover rubber 14 in the same manner as the conveyor belt 11, but another structure may be employed. For example, the belt sample B can be configured with the core layer 12 and the upper cover rubber 13 by omitting the lower cover rubber 14.

DESCRIPTION OF SYMBOLS 1 Wear test apparatus 2a Base 2b Post 2c Holding elongate hole 3 Arm part 3a Holding part 3b Rotating shaft 4 (4a, 4b, 4c) Contact member 5 Weight member 6 Drive motor 6a Control part 7a, 7b Pulley 8 Support base 9a Displacement sensor 9b Load sensor 9c Temperature sensor 10 Casing 11 Conveyor belt 12 Core layer 13 Upper cover rubber 14 Lower cover rubber 15a, 15b Pulley 16 Support roller 17 Another conveyor belt B Belt sample S Conveyed material

Claims (8)

  A pair of pulleys, a contact member that can contact the surface of an annular belt sample stretched between the pair of pulleys, a pressing mechanism that presses the contact member against the surface of the belt sample, and the contact member A weight member that changes a pressing load; and a displacement sensor that detects a displacement amount in a pressing direction of the contact member that presses the surface of the belt sample. The travel speed of the belt sample is variable, and the contact As a member, there are a plurality of types of contact members having different specifications of contact surfaces that contact the surface of the belt sample, and a contact member that presses the surface of the belt sample is arbitrarily selected and selected from the plurality of types of contact members The contact member is configured to be movable in the running direction of the belt sample and pressed against the surface of the belt sample. Wear test apparatus.   A support roller for supporting an inner peripheral surface of the belt sample is provided between the pair of pulleys, and the contact member is arranged at a position where the support roller supports the belt sample and a position where the belt sample is not supported. The wear test apparatus according to claim 1, wherein the wear test apparatus is configured to be pressed against a surface of a sample.   The wear test apparatus according to claim 1, further comprising a load sensor that sequentially detects the pressing load acting on the contact member and a running direction load of the belt sample.   The wear test apparatus according to any one of claims 1 to 3, further comprising a casing for changing an external environmental temperature of the belt sample.   The wear test apparatus according to claim 1, further comprising a temperature sensor that detects a surface temperature of the belt sample.   The pressing mechanism includes an arm portion to which the contact member is attached, and the other end portion in the longitudinal direction is pivotally supported by a rotating shaft, and the arm portion is pressed by the weight member so as to be centered on the rotating shaft. The wear test apparatus according to claim 1, wherein the arm portion is configured to be rotatable in the vertical direction.   An abrasion test method in which an annular belt sample is stretched between a pair of pulleys, and the contact member is pressed against the surface of the belt sample by a pressing mechanism. The speed is set to a desired speed, the pressing load by the contact member is set to a desired pressing load by the weight member, and the specifications of the contact surface contacting the surface of the belt sample provided as the contact member are different. A desired contact member is selected from the contact members, and the selected contact member is made movable in the running direction of the belt sample and pressed against the surface of the belt sample, and the surface of the belt sample is pressed. A wear test method, wherein a displacement amount in a pressing direction of the contact member is detected by a displacement sensor.   An inner peripheral surface of the belt sample is supported by a support roller between the pair of pulleys, and the belt member is positioned at a position where the support roller supports the belt sample and a position where the belt sample is not supported. The wear test method according to claim 7, wherein the wear test method is pressed against the surface of the wear.

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