Fatigue test device for roller parts of belt conveyor

Abstract

The utility model relates to a fatigue test device for roller parts of a belt conveyor, and belongs to the technical field of fatigue test of parts. Comprising a rack, and a torque loading device, a conveying belt loading device, a conveying belt restraining device and a roller test piece which are arranged on the rack, one end of the roller test piece is connected with the torque loading device, the conveying belt loading device comprises a loading tray, a connecting rod and a loading roller, the upper end of the connecting rod is connected with the loading tray, the lower end of the connecting rod is connected with the loading roller, the loading tray is installed on the top of the rack, and the conveying belt restraining device comprises a carrier roller and a conveying belt. And the conveying belt is wound on the carrier roller, the loading roller and the roller test piece to form a closed loop. According to the utility model, fatigue detection of roller parts of the belt conveyor under the conditions of no load, full load and different loads and under the working conditions of different rotating speeds can be carried out; and the stress state of roller parts in the belt conveyor under actual working conditions can be accurately simulated.

Description

Technical Field

[0001] The utility model relates to a fatigue testing device, in particular to a fatigue testing device for roller parts of a belt conveyor, and belongs to the technical field of fatigue testing of parts. Background Art

[0002] With the continuous development of industries such as aerospace, engineering machinery, and agricultural machinery, higher requirements are placed on the reliability of roller parts. In order to detect the durability and fatigue life of roller parts, it is necessary to perform loading fatigue tests on roller parts. Most of the existing fatigue loading methods test roller parts according to the loading method of shaft parts, but in actual working conditions, the rollers are subjected to the tension of the conveyor belt and the load applied to the conveyor belt, which is somewhat different from the bearing mode of shaft parts. The use of shaft parts fatigue loading devices cannot accurately reflect the stress state of the tested roller parts under actual working conditions, which is far from meeting actual needs. Therefore, in order to improve the roller fatigue theory and accurately predict the fatigue life of the roller, a fatigue test device that can reflect roller parts under different working conditions is studied. Utility Model Content

[0003] The utility model provides a belt conveyor roller parts fatigue test device to solve the problems in the prior art that the roller parts fatigue test simulation situation is greatly different from the actual working condition so that the reliability of the experimental result is low.

[0004] The technical solution adopted by the utility model is: a belt conveyor roller parts fatigue test device, characterized in that: it includes a frame 1 and a torque loading device 3, a conveyor belt loading device 4, a conveyor belt restraint device 5, and a roller specimen 12 installed on the frame 1; one end of the roller specimen 12 is connected to the torque loading device 3, the conveyor belt loading device 4 includes a loading tray 14, a connecting rod 18, and a loading roller 23, the upper end of the connecting rod 18 is connected to the loading tray 14, and the lower end is connected to the loading roller 23, the loading tray 14 is installed on the top of the frame 1, the conveyor belt restraint device 5 includes a roller 19 and a conveyor belt 22, the loading roller 23 and the roller 19 are all installed on both sides of the roller specimen 12, and the conveyor belt 22 is wound around the roller 19, the loading roller 23, and the roller specimen 12 to form a closed loop.

[0005] Specifically, the torque loading device 3 includes a primary reducer 2, a drive motor 6, a first coupling 7, a second coupling 8, a speed torque sensor 9, and a third coupling 10; the drive motor 6 and the primary reducer 2 are respectively installed on the frame 1, the input shaft of the primary reducer 2 is connected to the output shaft of the drive motor 6 through the first coupling 7, the output shaft of the primary reducer 2 is connected to one end of the speed torque sensor 9 through the second coupling 8, one end of the roller specimen 12 is connected to the other end of the speed torque sensor 9 through the third coupling 10, and the drive motor 6 and the speed torque sensor 9 are respectively connected to an external computer.

[0006] Preferably, a support plate 28 is fixed at the middle position of the front and rear ends of the bottom plate of the frame 1, a bearing seat Ⅰ11 is installed on the support plate 28, and the roller specimen 12 is installed on the bearing seat Ⅰ11 through bearings Ⅰ27 installed at its two ends.

[0007] Preferably, upper and lower support frames 29 are symmetrically installed on the front and rear side panels of the frame 1, a bearing seat III 21 is installed on the support frame 29, and the roller 19 is installed on the bearing seat III 21 through bearings III 20 installed at both ends thereof.

[0008] Preferably, the top plate of the frame 1 is provided with a through hole, and the branch at the upper end of the connecting rod 18 passes through the through hole and is connected to the bottom of the loading tray 14 through the connecting rod seat 17, and the branch at the lower end of the connecting rod 18 is connected to the bearing seat Ⅱ24, and the loading roller 23 is installed on the bearing seat Ⅱ24 through bearings Ⅱ25 installed at both ends, and the outer end of the bearing Ⅱ25 is fixed with a fixing bolt 26.

[0009] Preferably, a dovetail block 30 is installed on the top of the frame 1 , and dovetail grooves 13 are opened at both ends of the loading tray 14 , and the dovetail grooves 13 of the loading tray 14 are slidably matched with the dovetail block 30 of the frame 1 .

[0010] The utility model has the following beneficial effects:

[0011] 1. The mechanical structure of the test device of the utility model is simple, and the loading device using the conveyor belt loading skillfully solves the problem of pressure bending moment applied to roller parts.

[0012] 2. The utility model can realize fatigue detection of roller parts under the load condition of conveyor belt friction, and can also realize torque loading of roller parts under different working conditions of repeated start and stop and different speed conditions. Therefore, it can detect the fatigue detection of belt conveyor roller parts under no-load, full-load and different load conditions of repeated start and stop and different speed conditions.

[0013] 3. The utility model can accurately simulate the stress state of roller parts in belt conveyors under actual working conditions to a great extent, making fatigue theory analysis of key driving parts more accurate and further improving the credibility and accuracy of test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the torque loading device of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the conveyor belt loading device of the utility model;

[0017] Figure 4 This is a schematic diagram of the frame structure of the utility model.

[0018] The numbers in the figure are: 1: frame, 2: primary reducer, 3: torque loading device, 4: conveyor belt loading device, 5: conveyor belt restraint device, 6: motor, 7: first coupling, 8: second coupling, 9: speed torque sensor, 10: third coupling, 11: bearing seat I, 12: roller specimen, 13: dovetail groove, 14: loading tray, 17: connecting rod seat, 18: connecting rod, 19: roller, 20: bearing III, 21: bearing seat III, 22: conveyor belt, 23: loading roller, 24: bearing sleeve II, 25: bearing II, 26: fixing bolt, 27: bearing I, 28: support plate, 29: support frame, 30: dovetail block. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the content of the present invention is not limited to the described scope.

[0020] Example 1: Figure 1-4As shown, a belt conveyor roller parts fatigue test device comprises a frame 1, a torque loading device 3, a conveyor belt loading device 4, a conveyor belt restraining device 5, and a roller specimen 12; one end of the roller specimen 12 is connected to the torque loading device 3 and both are installed on the frame 1, the conveyor belt loading device 4 is installed on the frame 1 to apply force to the roller specimen 12, a two-layer roller support frame 29 is installed on the frame 1, and its function is to support the roller bearing III 21, a dovetail block 30 is installed on the upper part of the frame 1, and a support plate 28 is installed on the frame 1 , bearings Ⅰ27 are installed at both ends of the roller specimen 12, a bearing seat Ⅰ11 is installed on the support plate 28, and the roller specimen 12 is installed on the bearing seat Ⅰ11 through the bearing Ⅰ27. The conveyor belt loading device 4 includes a loading tray 14, a connecting rod 18, a loading roller 23, and a bearing seat Ⅱ24; dovetail grooves 13 are opened at both ends of the loading tray 14, and the dovetail grooves 13 of the loading tray 14 cooperate with the dovetail block 30 of the frame 1, which reduces the friction between the loading tray 14 and the frame 1 and improves the transmission accuracy. A connecting rod is installed at the upper end of the connecting rod 18. The upper end of the connecting rod 18 is connected and installed at the bottom of the loading tray 14 through the connecting rod seat 17. The bearing seat II 24 connects the two connecting rod branches at the lower end of the connecting rod 18. The branch function prevents the bearing seat II 24 from deflecting when it is subjected to the force of the connecting rod 18. The loading roller 23 is installed on the bearing seat II 24 through the bearings II 25 installed at both ends, and is fixed with fixing bolts 26 at the outer end of the bearing II 25. The conveyor belt restraint device 5 includes a roller 19, a bearing seat III 21, and a conveyor belt 22; the bearing seat III 21 is installed on the support frame 29, the roller 19 is installed on the bearing seat III 21 through the bearings III 20 installed at both ends of the roller 19, four rollers 19 are respectively installed on the two-layer support frame 29 on the frame 1, the conveyor belt 22 is installed on the roller specimen 12, the roller 19, and the loading roller 23. The conveyor belt 22 is in contact with the outer sides of the four rollers 19. The four rollers 19 are used to constrain the movement trajectory of the conveyor belt. The loading roller 23 moves downward when the loading tray 14 is under force, thereby loading the conveyor belt 22, and further loading the external load to the roller specimen 12.

[0021] The torque loading device 3 includes a primary reducer 2, a drive motor 6, a first coupling 7, a second coupling 8, a speed torque sensor 9, and a third coupling 10; the drive motor 6 and the primary reducer 2 are respectively installed on the frame 1, the input shaft of the primary reducer 2 is connected to the output shaft of the drive motor 6 through the first coupling 7, the output shaft of the primary reducer 2 is connected to one end of the speed torque sensor 9 through the second coupling 8, one end of the roller specimen 12 is connected to the other end of the speed torque sensor 9 through the third coupling 10, the drive motor 6 and the speed torque sensor 9 are respectively connected to the computer, the speed torque sensor 9 transmits the read speed torque of the roller specimen 12 to the computer, the computer monitors the speed torque data of the measured roller specimen 12 in real time, and the computer controls the start and stop and speed of the drive motor 6, thereby simulating the operation of the roller specimen 12 under actual working conditions.

[0022] The working principle of the utility model is as follows: in the torque loading device 3, after the torque is output by the motor 6, the torque is decelerated by the primary reducer 2 to transfer the torque to the roller specimen 12 to make it rotate; in the conveyor belt constraint device 5, four rollers 19 cooperate with the conveyor belt 22 to determine the movement path of the conveyor belt 22; the additional roller specimen 12 contacts and cooperates with the conveyor belt 22 to form a transmission closed loop; in the conveyor belt loading device 4, a loading force is applied to the loading tray 14, and the loading force is transferred to the loading roller 23 through the connecting rod 18 and the bearing sleeve II 24; the loading roller 23 contacts and cooperates with the conveyor belt 22 to apply the loading force to the conveyor belt 22 of the transmission closed loop; therefore, driven by the motor 6, the roller specimen 12 transfers the torque to the loading roller 23 and the roller 19 through the conveyor belt 22 to form a complete transmission system.

[0023] The utility model can detect the fatigue of roller parts of belt conveyor under no-load, full-load and repeated start-stop under different load conditions and different speed conditions; it can accurately simulate the stress state of roller parts in belt conveyor under actual working conditions, make the fatigue theory analysis of key driving components more accurate, and further improve the credibility and accuracy of test results.

[0024] The utility model only protects the structure of the device, and all solutions related to the method can be realized by the prior art.

[0025] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A belt conveyor roller parts fatigue test device, characterized in that: The invention comprises a frame (1) and a torque loading device (3), a conveyor belt loading device (4), a conveyor belt restraining device (5), and a roller specimen (12) installed on the frame (1); one end of the roller specimen (12) is connected to the torque loading device (3); the conveyor belt loading device (4) comprises a loading tray (14), a connecting rod (18), and a loading roller (23); the upper end of the connecting rod (18) is connected to the loading tray (14), and the lower end is connected to the loading roller (23); the loading tray (14) is installed on the top of the frame (1); the conveyor belt restraining device (5) comprises a roller (19) and a conveyor belt (22); the loading roller (23) and the roller (19) are installed on both sides of the roller specimen (12); the conveyor belt (22) is wound around the roller (19), the loading roller (23), and the roller specimen (12) to form a closed loop.

2. A belt conveyor roller parts fatigue testing device according to claim 1, characterized in that: The torque loading device (3) comprises a primary reducer (2), a drive motor (6), a first coupling (7), a second coupling (8), a speed torque sensor (9), and a third coupling (10); the drive motor (6) and the primary reducer (2) are respectively mounted on the frame (1); the input shaft of the primary reducer (2) is connected to the output shaft of the drive motor (6) through the first coupling (7); the output shaft of the primary reducer (2) is connected to one end of the speed torque sensor (9) through the second coupling (8); one end of the roller specimen (12) is connected to the other end of the speed torque sensor (9) through the third coupling (10); and the drive motor (6) and the speed torque sensor (9) are respectively connected to an external computer.

3. A belt conveyor roller parts fatigue testing device according to claim 1, characterized in that: A support plate (28) is fixed at the middle position of the front and rear ends of the bottom plate of the frame (1), a bearing seat I (11) is installed on the support plate (28), and the roller specimen (12) is installed on the bearing seat I (11) via bearings I (27) installed at both ends.

4. A belt conveyor roller parts fatigue testing device according to claim 1, characterized in that: The frame (1) is symmetrically provided with upper and lower support frames (29) on the front and rear side panels, and a bearing seat III (21) is installed on the support frame (29). The roller (19) is installed on the bearing seat III (21) via bearings III (20) installed at both ends thereof.

5. The belt conveyor roller parts fatigue testing device according to claim 1 is characterized in that: The top plate of the frame (1) is provided with a through hole, and the branch at the upper end of the connecting rod (18) passes through the through hole and is connected to the bottom of the loading tray (14) through the connecting rod seat (17), and the branch at the lower end of the connecting rod (18) is connected to the bearing seat II (24), and the loading roller (23) is installed on the bearing seat II (24) through the bearings II (25) installed at both ends, and the outer end of the bearing II (25) is fixed with a fixing bolt (26).

6. A belt conveyor roller parts fatigue testing device according to claim 1, characterized in that: A dovetail block (30) is installed on the top of the frame (1), and dovetail grooves (13) are opened at both ends of the loading tray (14). The dovetail grooves (13) of the loading tray (14) are slidably matched with the dovetail block (30) of the frame (1).

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