Portable belt conveyor drum static balance detection tooling

Abstract

The utility model relates to static balance testing device field discloses a portable belt conveyor drum static balance detection frock, including the support device of fixed on static balance test board, and the drum is placed on the support device, and can rotate freely on the support device, the highest point fixed connection of mass bias emphasis of drum one side has counterweight device, and counterweight device can pull the highest point to with the rotation axis of drum on the same horizontal plane, and display the weight of required counterweight.

Description

Technical Field

[0001] This utility model relates to the field of static balance testing devices for rollers, and in particular to a portable static balance testing fixture for belt conveyor rollers. Background Technology

[0002] Static balancing refers to adjusting the mass distribution of a rotating object in a static state so that its center of gravity or center of mass coincides with the axis of rotation. In industrial fields such as belt conveyors, mining machinery, and port logistics, rollers are core transmission components, and their static balance performance directly affects the stability of equipment operation, vibration and noise levels, and service life. Therefore, static balancing tests are required to assess the static balance performance of rollers.

[0003] In the traditional static balancing test of a roller, the roller must first be placed on the guide rail of the balancing frame. If the roller is unbalanced, it will roll on the guide rail. At this time, a counterweight needs to be added above the vertical line passing through the roller's axis. The size of the added counterweight is gradually adjusted until the roller can remain stationary in any position. The weight of the added counterweight is the required counterweight for the roller. Finally, it is determined whether the counterweight is less than the allowable unbalance weight corresponding to the roller. This method requires repeated adjustment of the counterweight, making the test process quite cumbersome. Utility Model Content

[0004] To overcome the problem that traditional static balance tests for belt conveyors require repeated adjustments of the counterweight and are cumbersome, this invention provides a portable static balance testing fixture for belt conveyors. By setting up a dedicated configuration device, it eliminates the need for repeated adjustments of the counterweight, and has the advantages of wide applicability, simple structure, and high testing efficiency.

[0005] The technical solution of this utility model is as follows:

[0006] A portable static balance testing fixture for belt conveyor rollers includes a support device fixed on a static balance test bench. The roller is placed on the support device and can rotate freely on the support device. A counterweight device is fixedly connected to the highest point opposite the mass eccentricity point of the roller. The counterweight device can pull the highest point to the same horizontal plane as the rotation axis of the roller and display the required counterweight weight.

[0007] Compared with existing technologies, the beneficial effects of this technical solution are as follows:

[0008] When performing static balance tests, this testing fixture only needs to pull the highest point of the counterweight device to the same horizontal plane as the rotation axis of the roller to display the required counterweight weight, without having to repeatedly adjust the weight of the counterweight. The testing process is simpler and more effective, with a wide range of applications, simple structure, and high testing efficiency.

[0009] Preferably, the roller is placed horizontally between two sets of support devices, which are positioned opposite each other and arranged symmetrically, with both ends of the roller resting on the support devices.

[0010] Its advantages are that this arrangement can stably support the rollers without restricting their free rotation.

[0011] More preferably, each set of support devices includes two symmetrically arranged rollers, the two rollers are of the same height, and the central axis of the two rollers extends in the same direction as the central axis of the drum; the two rollers do not connect with each other, and the end of the drum overlaps between the two rollers.

[0012] Its beneficial effects are as follows: by using this kind of support device with rollers to support the roller, it has the advantages of high load-bearing capacity, low friction and strong adaptability, and is especially suitable for the balance adjustment of medium and large or heavy rollers.

[0013] More preferably, the two ends of the roller are respectively engaged on the support frame, the support frame is vertically fixed on the test bench, and a cutting edge is opened on its top. The end of the central shaft of the roller passes through the cutting edge and is engaged in the cutting edge by a fixing plate fixed above it parallel to the cutting edge.

[0014] Its beneficial effects are: this setting can prevent the rotation of the roller's central axis from affecting the roller's free rotation and natural stopping, and can also improve the connection stability between the roller and the support frame.

[0015] In a further preferred embodiment, a connecting plate is vertically fixed between the two support frames for mounting the rollers. The connecting plate is located below the rollers, and its bottom is vertically fixed to the mounting plate along with the support frame. The mounting plate is fixed parallel to the surface of the test bench. A triangular reinforcing rib is also fixed between each support frame and the surface of the mounting plate.

[0016] Its beneficial effects are as follows: the connecting plate is used to connect the two support frames, improving the connection stability between them and the support performance of the roller; the mounting plate is used to fix the entire support device on the test bench, improving the overall structural stability; the triangular reinforcing rib plate can improve the structural strength of the support frame and increase its support performance.

[0017] Preferably, the counterweight device includes a fixed head, a weighing device, and a counterweight block arranged sequentially from top to bottom. The fixed head is fixed at the outer edge of the roller at the highest point. An adjustable-length suspension rope is provided between the fixed head and the weighing device. A connecting rope is fixed between the weighing device and the counterweight block. The counterweight block is placed or fixed on the test platform.

[0018] Its advantages are as follows: when using this counterweight device to conduct static balance tests, the required counterweight weight of the test roller can be obtained through the display value of the weighing device without repeatedly adjusting the counterweight. The test process is simpler and more effective, with a wide range of applications, simple structure, and high test efficiency.

[0019] More preferably, one end of the fixing head is fixedly connected to the roller by adhesive bonding, cold welding or magnetic attraction, and the other end is provided with a connecting hole through which the movable end of the suspension rope passes.

[0020] Its beneficial effect is that it enables the fixed head to maintain a stable connection with the roller.

[0021] More preferably, the weighing device is an electronic crane scale, with the top ring of the electronic crane scale being tied and fixed to the suspension rope, and the bottom end being provided with a hook.

[0022] Its beneficial effect is that the electronic crane scale is used to display the required weight of the roller.

[0023] More preferably, the connecting rope has a loop structure, with its bottom end fixed to the surface of the counterweight and its top end suspended on a hook.

[0024] Its beneficial effect is that the connecting rope is used to attach the counterweight to the bottom of the electronic crane scale.

[0025] More preferably, the horizontal plane where the rotation axis of the roller is located is determined by a level.

[0026] Its beneficial effect is that by using a level, operators can be helped to determine the horizontal plane on which the rotation axis of the roller is located, making it easier to accurately rotate the highest point to the horizontal plane on which the rotation axis is located. Attached Figure Description

[0027] This utility model will be described with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the structure of the counterweight device of this utility model installed on the drum;

[0029] Figure 2 This is a side view of the counterweight device of this utility model;

[0030] Figure 3 This is a side view of the counterweight device of this utility model installed at the highest point of the drum;

[0031] Figure 4 for Figure 3 A schematic diagram of the structure after the highest point of the middle roller has been rotated 90°.

[0032] Figure 5 This is a front view of the roller of this utility model placed on the support device;

[0033] Figure 6 This is a side view of the roller of this utility model placed on the support device;

[0034] Reference numerals: Roller 11, Central shaft 111, Support frame 12, Cutting edge 121, Fixing plate 122, Connecting plate 13, Mounting plate 14, Triangular reinforcing rib plate 15, Roller 2, Roller shaft 21, Counterweight device 3, Fixing head 31, Connecting hole 311, Weighing device 32, Lifting ring 321, Hook 322, Counterweight block 33, Lifting rope 34, Moving end 341, Connecting rope 35, Test bench 4, Mass eccentricity point 5, Highest point 6. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] Example 1: As Figures 1 to 6 The portable static balance testing fixture for a belt conveyor roller 2 shown includes a support device placed on the surface of a static balance test bench 4. The roller 2 is placed on the support device and can roll freely under the constraint of the support device, that is, the two ends of the roller shaft 21 of the roller 2 overlap the support device, and the roller 2 body can rotate around the roller shaft 21. Figures 3 to 4 As shown, a counterweight device 3 is fixedly connected to the highest point 6 on the opposite side of the mass eccentricity point 5 of the roller 2. The counterweight device 3 can pull the highest point 6 to the same horizontal plane as the rotation axis of the roller 2 and display the required counterweight weight.

[0037] The static balance of roller 2 requires its center of gravity to coincide with its axis of rotation. The center of gravity of roller 2 is the equivalent point of application of the gravity acting on all parts of roller 2, i.e., the geometric center of mass distribution. The axis of rotation of roller 2 is the axis around which roller 2 actually rotates. When roller 2 is stationary, if the mass distribution is uneven, gravity will cause it to rotate on its own at the support point, and eventually the center of gravity will be concentrated at the same lowest position, which is the mass eccentricity point 5. In practical applications, roller 2 can hardly meet the static balance requirements. Therefore, counterweights must be added during the static balance test, and the counterweight must be calculated to ensure that it meets the allowable unbalance weight. The allowable unbalance weight refers to the maximum residual unbalance that roller 2 is allowed to have after balancing. Its core purpose is to ensure that the centrifugal force generated by roller 2 during rotation does not exceed the limits for safe operation of the equipment, thereby avoiding vibration, noise and mechanical damage.

[0038] When using this testing fixture, first place roller 2 on the support device and allow it to rotate freely. Then gently push it to rotate slowly and observe the position of roller 2 after it comes to rest. Repeat this 3-5 times and mark the lowest point (i.e., mass eccentricity point 5) each time it comes to rest. If the position of the lowest point of roller 2 is random each time it comes to rest, it indicates that the static balance is good and the static balance requirement of roller 2 is met. If the position of the lowest point is fixed or concentrated (this lowest point is mass eccentricity point 5), then counterweights need to be added and the unbalance amount needs to be calculated. If the roller 2 cannot achieve the static balance requirement, the counterweight device 3 is fixedly connected to the highest point 6 opposite the mass eccentricity point 5 of the roller 2. The counterweight device 3 is pulled down so that the highest point 6 rotates down 90° to be on the same horizontal plane as the rotation axis of the roller 2. At this time, the highest point 6 and the mass eccentricity point 5 of the roller 2 are both on the horizontal plane where the rotation axis of the roller 2 is located, and the two points are in a balanced state. The display value of the counterweight device 3 is the required counterweight weight of the roller 2. Finally, the counterweight weight is compared with the allowable unbalance weight corresponding to the test roller 2. If the counterweight weight is less than the allowable unbalance weight, the static balance test requirement is met. If the counterweight weight is greater than the allowable unbalance weight, the static balance test requirement is not met, and correction construction is required.

[0039] Therefore, when performing static balance tests, this testing fixture only needs to pull the highest point 6 of the counterweight device 3 to the same horizontal plane as the rotation axis of the roller 2 to display the required counterweight weight, without having to repeatedly adjust the weight of the counterweight. The test process is simpler and more effective, with a wide range of applications, simple structure, and high test efficiency.

[0040] Example 2: Based on Example 1, the support device is optimized. The roller 2 is placed horizontally between two sets of support devices, which are opposite each other and symmetrically arranged. The two ends of the roller shaft 21 of the roller 2 are respectively supported on the support devices. This arrangement can stably support the roller 2 without restricting its free rotation.

[0041] Specifically, such as Figures 4 to 5 As shown, each support device includes two symmetrically arranged rollers 11. The two rollers 11 are of the same height, and their central axes extend in the same direction as the central axis of the roller 2. The two rollers 11 are not connected to each other. The two ends of the roller shaft 21 of the roller 2 are respectively connected between the two rollers 11 of each support device, and will not fall off. By using this kind of support device with rollers 11 to support the roller 2, it has the advantages of high load-bearing capacity, low friction, and strong adaptability, and is especially suitable for the balancing and adjustment of medium, large or heavy rollers 2.

[0042] Furthermore, each roller 11 is respectively engaged at both ends on two sets of support frames 12. The support frames 12 are vertically fixed on the test bench 4, with their tops recessed downwards to form a U-shaped groove, which serves as a cutting edge 121. The two ends of the central shaft 111 of each roller 11 pass through the cutting edges 121 of the two support frames 12 and are engaged and connected within the cutting edges 121. A fixing plate 122 is provided on the upper part of the cutting edge 121. The fixing plate 122 is horizontally arranged, and its two ends are fixedly connected to the sides of the support frames 12 on both sides of the upper part of the cutting edge 121 by bolts. The end of the central shaft 111 of the roller 11 is fixed in the mounting hole formed by the connecting plate 13 and the cutting edge 121. This arrangement can prevent the central shaft 111 of the roller 11 from rotating, thereby affecting the free rotation and natural stopping of the roller 2, and can also improve the connection stability between the roller 11 and the support frame 12.

[0043] Preferably, a connecting plate 13 is vertically fixed between the two support frames 12 on both sides of the roller 11. The connecting plate 13 is integrally formed with the support frame 12 or fixedly connected by fasteners, and the connecting plate 13 is located below the roller 11. The bottoms of the connecting plate 13 and the support frame 12 are fixed to the same mounting plate 14 and are vertically connected to the mounting plate 14, wherein the mounting plate 14 can be integrally formed with or integrally connected to the connecting plate 13 and the support frame 12. The mounting plate 14 is parallel to the surface of the test bench 4 and is fixedly connected to it by a threaded connection. In addition, a triangular reinforcing rib plate 15 is fixed between the outer side of the support frame 12 and the surface of the mounting plate 14. The triangular reinforcing rib plate 15 is integrally formed with or integrally connected to the support frame 12 and the mounting plate 14, with its side connected to the support frame 12 and its bottom connected to the mounting plate 14. The connecting plate 13 is used to connect the two support frames 12, improving the connection stability between them and the support performance of the roller 2; the mounting plate 14 is used to fix the entire support device on the test bench 4, improving the overall structural stability; the triangular reinforcing rib plate 15 can improve the structural strength of the support frame 12 and increase its support performance.

[0044] Example 3: Based on Example 1, the counterweight device 3 is optimized. The counterweight device 3 includes a fixed head 31, a weighing device 32, and a counterweight block 33 arranged sequentially from top to bottom. The fixed head 31 is fixed at the outer edge of the roller 2 at the highest point 6, that is, at the intersection of the extension line of the highest point 6 and the end face of the roller 2. An adjustable length suspension rope 34 is provided between the fixed head 31 and the weighing device 32. The suspension rope 34 can be a steel wire rope. A connecting rope 35 is fixed between the weighing device 32 and the counterweight block 33. The connecting rope 35 can also be a steel wire rope. The counterweight block 33 is placed or fixed on the test platform 4. When the counterweight block 33 is placed on the test platform 4, its mass is much greater than the actual required counterweight weight.

[0045] When using this counterweight device 3, first mark the mass eccentricity point 5, then mark the highest point 6 on the opposite side of the mass eccentricity point 5, and vertically fix the fixing head 31 of the counterweight device 3 at the highest point 6. The fixing head 31 extends outward along the length of the roller 2. Then, use a suspension rope 34 to connect one end of the fixing head 31 to the top of the weighing device 32, and use a connecting rope 35 to connect the bottom of the weighing device 32 to the counterweight block 33. At this time, the counterweight device 3 is suspended and fixed at the aforementioned highest point 6. Finally, pull down the movable end 341 of the suspension rope 34, so that the distance of the suspension rope 34 connecting the fixing head 31 and the weighing device 32 becomes shorter. The highest point 6 will then rotate downward to one side under the downward pulling force. When the highest point 6 rotates to the same horizontal plane as the rotation axis of the roller 2, stop pulling down the suspension rope 34. At this time, the weighing device 32 will display the upward pulling force it receives, which is the required counterweight.

[0046] In addition, it should be noted that the required counterweight of the roller 2 is generally between tens of kilograms and hundreds of kilograms. Therefore, a fixed head 31 and a weighing device 32 with a total weight of several hundred grams can be selected. The weight of the two is negligible compared to the required counterweight. If the counterweight accuracy is to be improved, the value of the display value of the weighing device 32 minus the total weight of the fixed head 31 and the weighing device 32 can be used as the final required counterweight.

[0047] Therefore, when performing a static balance test using this counterweight device 3, the required counterweight weight of the test roller 2 can be obtained from the display value of the weighing device 32 without repeatedly adjusting the counterweight. The test process is simpler and more effective, with a wide range of applications, simple structure, and high test efficiency.

[0048] Preferably, the fixing head 31 is a horizontally arranged columnar structure, with one end fixedly connected to the roller 2 by adhesive bonding, cold welding, or magnetic attraction, so that the fixing head 31 and the roller 2 are stably connected. The corresponding connection method can be selected according to the actual situation of the roller 2. If the roller 2 is small in size and mass and is made of magnetic material, the fixing head 31 can also be made of magnetic material, and the two are fixed together by magnetic attraction, making it easier to remove after the test. If the roller 2 is small in size and mass and is not made of magnetic material, a strong adhesive can be used to connect the roller 2 and the fixing head 31. For example, epoxy resin adhesive has high adhesive strength, and a special adhesive remover can be used to dissolve it when removing the fixing head 31. If the roller 2 is large in size and mass, cold welding can be used to connect the roller 2 and the fixing head 31, which has high connection strength and causes less damage to the surface of the roller 2 compared to ordinary welding. Finally, it can be disassembled by grinding and hammering.

[0049] The other end of the fixed head 31 is provided with a connecting hole 311. The movable end 341 of the suspension rope 34 passes through the connecting hole 311. By pulling the movable end 341 downward, the suspension rope 34 can be tightened, and under the gravity of the counterweight 33, the highest point 6 is pulled to the fixed position.

[0050] Preferably, the weighing device 32 is an electronic crane scale with a maximum weighing capacity of 200 kg, which can accommodate the required counterweight of most rollers 2. The electronic crane scale is used to display the required counterweight of rollers 2. The lifting ring 321 at the top of the electronic crane scale is tied and fixed to the lifting rope 34, and the bottom end is provided with a hook 322. The connecting rope 35 is a closed loop structure, with its bottom end fixed to the surface of the counterweight block 33 and its top end hanging on the hook 322. The connecting rope 35 is used to hang the counterweight block 33 at the bottom end of the electronic crane scale.

[0051] In a further preferred embodiment, the horizontal plane on which the rotation axis of roller 2 is located is determined by a level. Using a level can help the operator determine the horizontal plane on which the rotation axis of roller 2 is located, making it easier to accurately rotate the highest point 6 to the horizontal plane on which the rotation axis is located.

[0052] After arranging all components of the counterweight device 3, turn on the level and adjust its height and position so that its indicator line is parallel to the end face of the roller 2, intersects with the edge of the end face of the roller 2, and intersects with the center line of the end of the roller shaft 21 (which can be marked in advance). When the indicator line intersects with the center line of the end of the roller shaft 21, the point where it intersects with the edge of the end face of the roller 2 is the position to which the marked highest point 6 needs to be rotated. Pulling the movable end 341 of the suspension rope 34 downwards will lift the electronic crane scale upwards and tighten the suspension rope 34 and the connecting rope 35. Since the counterweight 33 is fixed or placed on the test platform 4, its mass is much greater than the actual required counterweight. Therefore, pulling the suspension rope 34 will not lift the counterweight 33. Under the action of the counterweight 33, the highest point 6 can be pulled downwards through the fixed head 31. Rotating the highest point 6 downwards to the position where it coincides with the indicator line of the level means that the highest point 6 and the rotation axis of the roller 2 are on the same horizontal plane.

[0053] The above embodiments merely illustrate specific implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the technical solution of this application, and these all fall within the scope of protection of this application.

Claims

1. A portable static balance testing fixture for belt conveyor rollers, comprising a support device fixed on a static balance test bench (4), wherein the roller (2) is placed on the support device and can rotate freely on the support device, characterized in that: A counterweight device (3) is fixedly connected to the highest point (6) on the opposite side of the mass eccentricity point (5) of the roller (2). The counterweight device (3) can pull the highest point (6) to the same horizontal plane as the rotation axis of the roller (2) and display the required counterweight weight.

2. The portable belt conveyor roller static balance testing fixture according to claim 1, characterized in that: The roller (2) is placed horizontally between two sets of support devices. The two sets of support devices stand opposite each other and are arranged symmetrically. The two ends of the roller (2) are respectively placed on the support devices.

3. The portable belt conveyor roller static balance testing fixture according to claim 2, characterized in that: Each set of support devices includes two symmetrically arranged rollers (11), the two rollers (11) are at the same height, and their central axes extend in the same direction as the central axis of the drum (2); the two rollers (11) do not connect with each other, and the end of the drum (2) overlaps between the two rollers (11).

4. The portable belt conveyor roller static balance testing fixture according to claim 3, characterized in that: The two ends of the roller (11) are respectively attached to the support frame (12). The support frame (12) is vertically fixed on the test bench (4). A cutting edge (121) is provided on its top. The end of the central shaft (111) of the roller (11) passes through the cutting edge (121) and is attached to the cutting edge (121) by a fixing plate (122) that is fixed parallel to the cutting edge (121) above.

5. The portable belt conveyor roller static balance testing fixture according to claim 4, characterized in that: A connecting plate (13) is also vertically fixed between the two support frames (12) for mounting the roller (11). The connecting plate (13) is located below the roller (11), and its bottom is vertically fixed on the mounting plate (14) at the same time as the support frame (12). The mounting plate (14) is fixed parallel to the surface of the test bench (4). A triangular reinforcing rib plate (15) is also fixed between each support frame (12) and the surface of the mounting plate (14).

6. The portable belt conveyor roller static balance testing fixture according to claim 1, characterized in that: The counterweight device (3) includes a fixed head (31), a weighing device (32) and a counterweight block (33) arranged from top to bottom. The fixed head (31) is fixed at the outer edge of the roller (2) at the highest point (6). An adjustable suspension rope (34) is provided between the fixed head (31) and the weighing device (32). A connecting rope (35) is fixed between the weighing device (32) and the counterweight block (33). The counterweight block (33) is placed or fixed on the test bench (4).

7. The portable belt conveyor roller static balance testing fixture according to claim 6, characterized in that: One end of the fixed head (31) is fixedly connected to the roller (2) by adhesive bonding, cold welding or magnetic attraction, and the other end is provided with a connection hole (311), through which the movable end (341) of the suspension rope (34) passes.

8. The portable belt conveyor roller static balance testing fixture according to claim 6, characterized in that: The weighing device (32) is an electronic crane scale. The top ring (321) of the electronic crane scale is tied to the rope (34) and the bottom is provided with a hook (322).

9. A portable static balance testing fixture for belt conveyor rollers according to claim 8, characterized in that: The connecting rope (35) is a loop structure, with its bottom end fixed to the surface of the counterweight (33) and its top end suspended on the hook (322).

10. A portable static balance testing fixture for belt conveyor rollers according to any one of claims 1-9, characterized in that: The horizontal plane where the rotation axis of the roller (2) is located is determined by a level.

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