Bearing gear fault diagnosis test bench

Abstract

The utility model provides a bearing gear fault diagnosis test bench, comprising a test bench pedestal which is provided with a bearing race; the bottom of the bearing race is fixedly connected with the upper surface of the test bed base, the top of the bearing race is fixedly connected with the inner ring of the turntable bearing, the outer ring of the turntable bearing is meshed with the pinion, and the lower part of the connecting bracket is fixed with the outer ring of the turntable bearing; the pinion is connected with an output shaft of the planetary reducer, an input shaft of the planetary reducer is connected with an output shaft of the torque-limiting coupling, an input end of the torque-limiting coupling is connected with an output shaft of the block brake, and an input shaft of the block brake is connected with an output shaft of the motor. According to the utility model, turntable bearing fault diagnosis and pinion fault diagnosis are realized through the acoustic emission sensor functionally. And through the matching of the split type connecting bracket and the guide rail, the turntable bearing is more convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment fault detection equipment, in particular to a bearing gear fault diagnosis test bench. Background Art

[0002] The rotation of the stacker-reclaimer boom is accomplished by the slewing bearing and the gears that match it. After long-term operation, the slewing bearing will suffer from wear, fatigue and peeling. The failure of the bearing will generate high temperature, vibration, noise and impact. Since the inner ring of the bearing is fixed and the outer ring meshes with the gear for rotation, the gear meshing with the outer ring of the bearing will suffer from tooth surface wear, cracks and broken teeth due to factors such as heavy loads and reversing impacts in harsh working environments. Therefore, the failure of the slewing bearing and gear will greatly affect the overall working performance of the stacker-reclaimer. Based on the above problems, fault detection of slewing bearings and gears has become an indispensable part of the equipment operation and maintenance process. However, the following problems often occur in the actual use of the prior art:

[0003] The slewing bearings and gears of stacker-reclaimers are in a low-speed and heavy-load state during operation. The technical means proposed by existing research institutes are still difficult to perform effective fault diagnosis on components in a low-speed and heavy-load state. The reasons are: first, there is a lack of effective data for the analysis and identification of various faults of components, and second, there is a lack of sufficient experimental means to study how to obtain effective signals for bearing and gear fault diagnosis under low-speed and heavy-load working conditions.

[0004] At present, there is a lack of a fault detection test bench for turntable bearings and gears under low-speed and heavy-load operating conditions. It is difficult for researchers to conduct a comprehensive study of the failure mechanism of the equipment. The existing test benches are often conventionally arranged, and the steps for replacing test pieces in the existing bearing and gear failure test benches are cumbersome. In addition, the existing installation methods are often accompanied by damage to the shaft, bearings, and gears, which is costly and not suitable for test scenarios where test pieces need to be replaced frequently. Therefore, it is difficult for conventional test benches to combine turntable bearing failure and gear failure experiments under low-speed and heavy-load conditions. Utility Model Content

[0005] The utility model provides a bearing gear fault diagnosis test bench, which solves the problem that the existing turntable bearing and gear fault detection test bench is not suitable for test scenarios where test pieces need to be frequently replaced.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A bearing gear fault diagnosis test bench comprises a test bench base, on which a bearing race is arranged;

[0008] The bottom of the bearing race is fixedly connected to the upper surface of the test bench base, the top of the bearing race is fixedly connected to the inner ring of the turntable bearing, the outer ring of the turntable bearing is meshed with the pinion, the lower part of the connecting bracket is fixed to the outer ring of the turntable bearing, the upper output shaft of the connecting bracket is connected to the magnetic powder loader, and the magnetic powder loader is fixed to the test bench through the mounting bracket and fasteners;

[0009] The pinion is connected to the output shaft of the planetary reducer, the input shaft of the planetary reducer is connected to the output shaft of the torque-limiting coupling, the input end of the torque-limiting coupling is connected to the output shaft of the block brake, and the input shaft of the block brake is connected to the output shaft of the motor.

[0010] Furthermore, a rotation speed sensor is arranged on the side of the pinion gear, and an acoustic signal sensor is arranged on the side of the outer ring of the turntable bearing.

[0011] Furthermore, the motor is arranged on a motor mounting frame, the block brake is arranged on a brake mounting frame, and the side surface of the planetary reducer is fixed on the reducer mounting frame.

[0012] Furthermore, a plurality of T-slots are provided on the upper end surface of the test bench base, and the motor mounting frame, the brake mounting frame, the reducer mounting frame and the bearing race are respectively fixed to the upper end surface of the test bench base through the T-slots.

[0013] Furthermore, the lower part of the reducer mounting frame is fixed to the test bench base through fasteners.

[0014] Furthermore, the connecting bracket includes a connecting bracket output shaft, a connecting bracket upper part and a connecting bracket lower part arranged from top to bottom, the connecting bracket upper part is connected to the connecting bracket output shaft, the connecting bracket lower part is provided with a first guide rail, a fixed table is provided on the test bench base on the side of the connecting bracket, and a second guide rail is provided on the fixed table, and the first guide rail and the second guide rail are opposite to each other at the same height.

[0015] Furthermore, a motor positioning piece is provided at one end of the motor mounting frame away from the bearing race, and the motor positioning piece is installed in cooperation with the T-slot through a fastener.

[0016] Furthermore, the fastener includes a fastening bolt and a fastening nut, and the fastening nut located at the lower end of the fastening bolt is adapted to the inner structural groove wall of the T-slot.

[0017] Furthermore, the motor positioning member includes a motor positioning plate, a U-shaped groove arranged at the lower end of the positioning plate, a shaft sleeve arranged at the lower end of the motor mounting frame, and a knob shaft inserted between the U-shaped groove and the shaft sleeve, a bearing for installing the knob shaft is provided in the U-shaped groove, and an internal thread matching the knob shaft is provided in the shaft sleeve.

[0018] The beneficial effects of the utility model are:

[0019] A major difficulty of the existing technical problems is that it is impossible to obtain the operating status data of the turntable bearing and gear under a specific speed and specific load through sensors in the experiment. However, the utility model simulates the operating status of the slewing mechanism of the stacker-reclaimer to obtain the experimental data under the corresponding state. Through these experimental data, in-depth research can be conducted on the fault diagnosis of the turntable bearing and gear under low speed and heavy load conditions, thereby solving the existing technical problems.

[0020] The utility model provides a guide rail on the test bench, cooperates with a connecting bracket of a split structure, separates the upper and lower layers of the connecting bracket, and realizes efficient movement of the load when replacing the test piece through traction of the guide rail, avoids the heavy disassembly and transportation process, and simplifies the replacement process of the bearing test piece. In addition, after the upper and lower structures are fixed, the bearing outer ring, the mounting bracket, and the load structure form a relatively static whole, which reduces the influence of the vibration of the load structure on the test data.

[0021] During the detection test, the position of the motor mounting bracket may be shifted. The present application achieves fine-tuning of the installation position of the motor mounting bracket by setting a motor positioning piece, thereby achieving precise installation of the motor position and accurately adjusting the position of the motor mounting bracket during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is the front view of the overall structure of the utility model.

[0024] Figure 2 It is a partial enlarged view of the end surface of the test bench of the utility model at the motor positioning plate.

[0025] Figure 3 This is a schematic diagram of the arrangement of the sensor of the utility model.

[0026] Figure 4 It is a side view of the connecting bracket of the utility model.

[0027] Figure 5 This is a top view of the connecting bracket of the utility model.

[0028] Figure 6 It is a side view of the magnetic powder loader of the utility model.

[0029] Figure 7 This is a top view of the magnetic powder loader of the utility model.

[0030] Description of Figure Numbers:

[0031] 1. Test bench base; 2. Bearing race; 3. Second guide rail; 4. Turntable bearing; 5. Connecting bracket; 51. Upper part of connecting frame; 52. Lower part of connecting frame; 53. Output shaft of connecting frame; 54. First guide rail; 6. Magnetic powder loader; 7. Pinion; 8. Reducer mounting frame; 9. Planetary reducer; 10. Torque-limiting coupling; 11. Block brake; 12. Brake mounting frame; 13. Motor; 14. Motor mounting frame; 15. Fastener; 16. T-slot; 17. Knob shaft; 18. Knob; 19. Motor positioning plate; 20. Speed ​​sensor; 21. Acoustic signal sensor; 22. U-slot. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0036] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0038] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0039] The utility model provides a technical solution: a bearing gear fault diagnosis test bench, such as Figure 1-7 As shown, it includes a test bench base 1, and a bearing race 2 is arranged on the test bench base 1;

[0040] The bottom of the bearing race 2 is fixedly connected to the upper surface of the test bench base 1, the top of the bearing race 2 is fixedly connected to the inner ring of the turntable bearing 4, and the outer ring of the turntable bearing 4 is meshed with the pinion 7 to achieve rotary motion. The lower part of the connecting bracket 5 is fixed to the outer ring of the turntable bearing 4, and the connecting bracket output shaft 53 is connected to the magnetic powder loader 6, and the magnetic powder loader 6 is fixed to the test bench through the mounting bracket and fasteners;

[0041] The pinion 7 is connected to the output shaft of the planetary reducer 9, the input shaft of the planetary reducer 9 is connected to the output shaft of the torque-limiting coupling 10, the input end of the torque-limiting coupling 10 is connected to the output shaft of the block brake 11, and the input shaft of the block brake 11 is connected to the output shaft of the motor 13. The planetary reducer 9 is a vertical planetary reducer.

[0042] A speed sensor 20 is provided on the side of the pinion 7 to detect the real-time speed of the pinion. An acoustic signal sensor 21 is provided on the side of the outer ring of the turntable bearing 4. The acoustic signal sensor 21 faces the outer ring with teeth and collects the acoustic signal when it is running.

[0043] The motor 13 is arranged on the motor mounting frame 14, the block brake 11 is arranged on the brake mounting frame 12, and the planetary reducer 9 is fixed to the reducer mounting frame 8 on the side. A plurality of axially symmetrically distributed T-slots 16 are provided on the upper end surface of the test bench base 1, and the motor mounting frame 14, the brake mounting frame 12, the reducer mounting frame 8 and the bearing race 2 are respectively fixed to the upper end surface of the test bench base 1 through the T-slots 16. The lower part of the reducer mounting frame 8 is fixed to the test bench base 1 through the fastener 15. The fastener 15 includes a fastening bolt and a fastening nut, and the fastening nut located at the lower end of the fastening bolt is adapted to the inner structural groove wall of the T-slot 16.

[0044] The connecting bracket 5 is provided with a first guide rail, and a fixed platform is provided on the test bench base 1 on the side of the connecting bracket 5, and the fixed platform is provided with a second guide rail 3, and the first guide rail and the second guide rail 3 are opposite to each other at the same height. The connecting bracket 5 is a split structure, namely, an upper connecting bracket 51 and a lower connecting bracket 52. The lower connecting bracket 52 is fixed to the outer ring of the turntable bearing 4, and the output shaft 53 of the connecting bracket is connected to the magnetic powder loader 6. After the magnetic powder loader 6 is released from the fixation, the upper connecting bracket 51 can slide on the first guide rail 54, and slide from the first guide rail 54 to the second guide rail 3, and at the same time drive the magnetic powder loader 6 to slide, which simplifies the replacement process of the test piece.

[0045] The motor mounting frame 14 is provided with a motor 13 positioning piece at one end away from the bearing race 2, and the motor 13 positioning piece is installed in cooperation with the T-slot 16 through the fastener 15. The motor 13 positioning piece includes a motor positioning plate 19, a U-shaped slot 22 provided at the lower end of the positioning plate, a shaft sleeve provided at the lower end of the motor mounting frame 14, and a knob shaft 17 inserted between the U-shaped slot 22 and the shaft sleeve, and a knob 18 is provided on the knob shaft 17. A bearing for installing the knob shaft 17 is provided in the U-shaped slot, and an internal thread matching the knob shaft 17 is provided in the shaft sleeve.

[0046] In the present application, a motor 13 is arranged on the test bench, and the motor 13 drives the turntable bearing 4 and the pinion 7 to be tested to rotate synchronously, so that gear failure and bearing failure can be simulated on one test bench.

[0047] In this application, the turntable bearing 4 and the output shaft pinion 7 of the planetary reducer 9 mesh and run, and the acoustic signal is different when the equipment is faulty and when it is running normally. Therefore, the acoustic signal generated by the equipment running can be collected by the sensor array and analyzed to perform fault diagnosis. The acoustic signal collection of the bearing and the pinion can be completed by arranging the acoustic signal sensor 21 array around the experimental table. It should be noted that Figure 3 What is presented here is only a brief illustration. In actual use, the sensor layout strategy should be adjusted according to the actual situation.

[0048] The motor mounting frame 14, the brake mounting frame 12, the reducer mounting frame 8 and the bearing race 2 are all installed by fasteners 15 and T-slots 16. Four parallel T-slots 16 are provided on the end surface of the test bench. A motor locating piece is provided at one end of the motor mounting frame 14 away from the bracket. The motor locating piece is installed by fasteners and T-slots 14.

[0049] The fastener 15 includes a threaded fastening bolt and a fastening nut. The nut at the lower end of the fastening bolt is adapted to the T-shaped structural groove wall in the T-shaped groove 16. Since the T-shaped structural groove wall in the T-shaped groove 16 limits the nut at the lower end of the fastening bolt, the fastener can be locked by rotating the fastening nut.

[0050] The motor positioning member includes a motor positioning plate 19, a U-shaped groove 22 arranged at the lower end of the motor positioning plate 19, a shaft sleeve arranged at the lower end of the motor mounting frame 14, and a knob shaft 17 inserted between the U-shaped groove 22 and the shaft sleeve. A bearing for installing the knob shaft is provided in the U-shaped groove 22. The bearing is arranged to prevent the U-shaped groove 22 from rotating synchronously when the knob shaft is rotated. An internal thread matching the knob shaft is provided in the shaft sleeve. A U-shaped groove 22 parallel to the two T-slots is provided between the two T-slots, and the knob shaft 17 is provided in the U-shaped groove 22.

[0051] In the present application, by providing a motor positioning piece at one end of the motor mounting frame 14, the position of the motor mounting frame can be fine-tuned during the fault diagnosis test. Specifically, before the test, the fasteners can be adjusted so that the motor mounting frame 14 and the motor positioning plate 19 can be flexibly moved. After the position of the motor mounting frame 14 is pre-fixed, the fasteners are operated to fix the positioning plate, and then the knob shaft 17 is rotated. Since the shaft sleeve is provided with an internal thread that cooperates with the knob shaft, the motor mounting frame can be driven to perform fine-tuning of the position along the T-slot. After the fine-tuning is completed, the fasteners 15 are locked respectively. During this process, the fasteners slide along the T-slot 16.

[0052] In the present application, the motor 13 at the top of the test bench is the driving component in the process of gear and bearing fault detection. Bearings and gears are the main sources of acoustic signals. During the detection test, the motor mounting bracket 14 may be offset in position. The present application achieves fine-tuning of the installation position of the motor mounting bracket by setting a motor positioning member, thereby achieving precise installation of the motor position and accurately adjusting the position of the motor mounting bracket during the test.

[0053] In the present application, after each mounting frame is fixed, each part and the test bench form a relatively static whole, and the noise caused by the vibration of the test bench when the motor is working has less impact on the test.

[0054] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bearing gear fault diagnosis test bench, characterized in that: It comprises a test bench base (1), on which a bearing race (2) is arranged; The bottom of the bearing race (2) is fixedly connected to the upper surface of the test bench base (1), the top of the bearing race (2) is fixedly connected to the inner ring of the turntable bearing (4), the outer ring of the turntable bearing (4) is meshed with the pinion (7), the lower part of the connecting bracket (5) is fixed to the outer ring of the turntable bearing (4), the upper output shaft of the connecting bracket (5) is connected to the magnetic powder loader (6), and the magnetic powder loader (6) is fixed to the test bench base (1) through a mounting bracket and fasteners; The pinion (7) is connected to the output shaft of the planetary reducer (9), the input shaft of the planetary reducer (9) is connected to the output shaft of the torque-limiting coupling (10), the input end of the torque-limiting coupling (10) is connected to the output shaft of the block brake (11), and the input shaft of the block brake (11) is connected to the output shaft of the motor (13).

2. The bearing gear fault diagnosis test bench according to claim 1 is characterized in that: A rotation speed sensor (20) is arranged on the side of the pinion (7), and an acoustic signal sensor (21) is arranged on the side of the outer ring of the turntable bearing (4).

3. The bearing gear fault diagnosis test bench according to claim 1 is characterized in that: The motor (13) is arranged on a motor mounting frame (14), the block brake (11) is arranged on a brake mounting frame (12), and the side surface of the planetary reducer (9) is fixed on a reducer mounting frame (8).

4. The bearing gear fault diagnosis test bench according to claim 3 is characterized in that: A plurality of T-shaped slots (16) are provided on the upper end surface of the test bench base (1), and the motor mounting frame (14), the brake mounting frame (12), the reducer mounting frame (8) and the bearing race (2) are respectively fixed to the upper end surface of the test bench base (1) via the T-shaped slots (16).

5. The bearing gear fault diagnosis test bench according to claim 4 is characterized in that: The lower part of the reducer mounting frame (8) is fixed to the test bench base (1) via a fastener (15).

6. The bearing gear fault diagnosis test bench according to claim 1 is characterized in that: The connecting bracket (5) comprises a connecting bracket output shaft (53), a connecting bracket upper part (51) and a connecting bracket lower part (52) arranged from top to bottom, the connecting bracket upper part (51) is connected to the connecting bracket output shaft (53), the connecting bracket lower part (52) is provided with a first guide rail (54), a fixed platform is provided on the test bench base (1) on the side of the connecting bracket (5), and a second guide rail (3) is provided on the fixed platform, and the first guide rail and the second guide rail (3) are opposite to each other at the same height.

7. The bearing gear fault diagnosis test bench according to claim 3 is characterized in that: A motor (13) positioning piece is provided at one end of the motor mounting frame (14) away from the bearing race (2), and the motor (13) positioning piece is mounted in cooperation with the T-slot (16) via a fastener (15).

8. The bearing gear fault diagnosis test bench according to claim 5 or 7, characterized in that: The fastener (15) comprises a fastening bolt and a fastening nut, and the fastening nut located at the lower end of the fastening bolt is adapted to the inner structural groove wall of the T-shaped groove (16).

9. The bearing gear fault diagnosis test bench according to claim 7 is characterized in that: The motor (13) positioning member comprises a motor positioning plate (19), a U-shaped groove (22) arranged at the lower end of the positioning plate, a shaft sleeve arranged at the lower end of the motor mounting frame (14), and a knob shaft (17) inserted between the U-shaped groove (22) and the shaft sleeve, a bearing for mounting the knob shaft (17) is arranged in the U-shaped groove, and an internal thread matching the knob shaft (17) is arranged in the shaft sleeve.

Images