Rolling bearing fault diagnosis simulation experiment device

Abstract

The invention belongs to the technical field of bearing fault detection, and discloses a rolling bearing fault diagnosis simulation experiment device which comprises a driving machine and a reduction gear box in transmission connection with the driving machine, and further comprises a conventional bearing frame and a bearing detection frame which are installed on an experiment table. An experimental bearing is mounted on the bearing detection frame; the conventional bearing frame, the bearing detection frame and the reduction gear box are coaxially connected, and an adjustable eccentric wheel is further installed between the main shaft of the conventional bearing frame and the main shaft of the bearing detection frame. Adjustment can also be carried out through the corresponding relation between the eccentric balance weight of the adjusting type eccentric wheel and the radial direction of the main shaft. When the radial direction of the pressure applied by the eccentric counter weight just corresponds to a damaged position, the pressure can be continuously applied to the damaged position, and a voiceprint signal or a vibration signal and the like can be amplified. The approximate damage position can be confirmed by the shutdown marking position, and then the next position is switched for testing.

Description

Technical Field

[0001] The invention belongs to the technical field of bearing fault detection, in particular to a rolling bearing fault diagnosis simulation experimental device. Background Art

[0002] Rolling bearings are widely used in industry, and individual bearing inspections are required during many equipment maintenance processes. This is used to confirm bearing damage and identify the location of damage. Bearing failures and damage typically arise from wear and tear on the inner and outer rings or wear on the balls. Common methods used include acoustic characterization and vibration spectrum signal detection. Wear at different locations on the bearing produces different acoustic signals, indicating different fault sound patterns. Experienced operators can determine the condition of a bearing and the location of damage based solely on the rolling sound. Vibration signal detection is used to capture abnormal vibration spectra during bearing motion and identify fault characteristics through FFT or wavelet transforms.

[0003] However, existing bearing fault diagnosis devices lack the ability to coordinate with test benches to pinpoint the exact location and extent of damage. Instead, they can only approximate the damage location based on the vibration spectrum and fault soundprint. For example, if the inner or outer ring is damaged, the approximate location of the damage cannot be determined without careful observation.

[0004] This application proposes a rolling bearing fault diagnosis simulation experimental device to overcome the above-mentioned defects. Summary of the Invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a rolling bearing fault diagnosis simulation experimental device.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a rolling bearing fault diagnosis simulation experimental device, comprising a driving motor and a reduction gearbox connected thereto, and further comprising a conventional bearing frame and a bearing detection frame mounted on a test bench, wherein the conventional bearing frame is mounted with a normal bearing, and the bearing detection frame is mounted with an experimental bearing;

[0007] The conventional bearing frame, the bearing detection frame and the reduction gearbox are coaxially connected, and an adjustable eccentric wheel is installed between the main shafts of the conventional bearing frame and the bearing detection frame, and the adjustable eccentric wheel is used to apply radial force to the main shaft between the conventional bearing frame and the bearing detection frame in a directional or non-directional manner;

[0008] The end of the main shaft is also connected to a radial pulling mechanism for applying a directional radial force.

[0009] Preferably, the adjustable eccentric wheel comprises two disc units mounted on the main shaft, the two disc units are spliced ​​into a disc as a whole by bolts, and a counterweight module is installed between the two units for increasing the eccentric counterweight.

[0010] The adjustable eccentric wheel can rotate along with the main shaft.

[0011] Preferably, the counterweight module is composed of two clamping units and a lead rod clamped in the middle, the two clamping units are respectively fixed on the wheel disc, and the lead rod is pressed inside by the splicing of the wheel disc;

[0012] The counterweight module is used to assemble the outer end of the inner hole of the lead rod, and an inner step is provided to abut against the end of the lead rod.

[0013] Preferably, the inner surface of the wheel disc is provided with two ridges for accurately inserting the counterweight module.

[0014] Preferably, the adjustable eccentric wheel further comprises two rotating shafts, which rotatably mount the wheel disc on the main shaft;

[0015] A ratchet module, which is keyed to the main shaft and disposed between the two rotating shafts;

[0016] A positioning hoop, which is fixed between the two disc units of the wheel;

[0017] A damping air cylinder and a ratchet, wherein the ratchet engages with the ratchet of the ratchet module, the damping air cylinder is movably mounted on the positioning hoop and the piston rod end is movably connected to the ratchet to block the rotation of the ratchet;

[0018] The ratchet module rotates along the rotation direction of the main shaft and rotates along the rotatable direction of the ratchet teeth.

[0019] Preferably, the ratchet module is provided with two ratchet units, the two ratchet units have the same specifications, and the teeth between the two ratchet units are staggered;

[0020] The two ratchet units are connected and assembled into a ratchet module by means of positioning pins;

[0021] The damping air cylinder and ratchet are provided in two groups and act on two ratchet units respectively.

[0022] Preferably, the damping air cylinder is provided with an air port at the rear end of the cylinder body, and a one-way valve disc is provided in the air port. The one-way valve disc has a faster speed when taking air inward and a slower speed when venting air outward;

[0023] A limit buckle is also provided on the positioning hoop to limit the rotation range of the ratchet.

[0024] Preferably, the radial pulling mechanism includes a secondary wheel connected to the output shaft end of the bearing detection frame, the adjustment platform and the main wheel are installed on the test bench, the secondary wheel, the adjustment platform and the main wheel are connected by a pulley transmission, and the adjustment platform includes a height adjustment groove and a top support wheel for adjusting the tightness of the belt.

[0025] Preferably, the bearing detection frame is provided with mounting holes for assembling a vibration sensor and a sound collector.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention applies radial pressure to the main shaft via an adjustable eccentric. The faster the rotation, the greater the radial pressure applied. Furthermore, this radial force is not always directed in one direction, but is continuously adjusted as the main shaft rotates. Furthermore, the correspondence between the eccentric counterweight of the adjustable eccentric and the radial direction of the main shaft can also be adjusted. When the radial direction of the pressure applied by the eccentric counterweight corresponds exactly to a damaged location, continuous pressure can be applied to the damaged location, amplifying the soundprint signal or vibration signal. The machine can be stopped to mark a location to confirm the approximate location of the damage before switching to the next location for testing.

[0028] By setting the rotation of the ratchet module and the ratchet teeth to rotate in the same direction, and the wheel disc rotating on the main shaft, the ratchet module drives the ratchet teeth and the damping air cylinder to drive its rotation. When the ratchet teeth and the ratchet module engage, the ratchet module can push the ratchet teeth to cooperate with the damping air cylinder to drive the wheel disc to rotate synchronously. In this way, a temporarily relatively stable relative position between the wheel disc and the main shaft is obtained, and this position can be mapped to the detection bearing. If a problem occurs in the bearing detection at this time, the machine can be stopped to mark the mapping position of the counterweight module on the wheel disc on the bearing to determine the approximate area of ​​damage.

[0029] By configuring a dual ratchet module, damping cylinder, and ratchet teeth, during each deflection, one set engages while the other returns to its initial position. Once the first set disengages, the other quickly engages the ratchet module and locks into place. Compared to a single set, the ratchet teeth effectively gain standby time. They can fully reset and re-engage with the ratchet module. Furthermore, the damping cylinder can extend the retention time at a specific angle, enabling voiceprint collection or vibration signal capture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the simulation experimental device of the present invention;

[0031] Figure 2 It is a structural side view of the simulation experimental device of the present invention;

[0032] Figure 3A schematic diagram of the positions of the ratchet module and the rotating shaft of the present invention;

[0033] Figure 4 Schematic diagram of the double-unit dislocation of the ratchet module of the present invention;

[0034] Figure 5 Schematic diagram of the coordination of the ratchet module, the damping air cylinder and the ratchet teeth of the present invention;

[0035] Figure 6 This is a schematic diagram of the disassembly of the structure of the adjustable eccentric wheel of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the load mechanism of the present invention.

[0037] In the figure: 100, driving motor; 200, reduction gearbox; 300, conventional bearing frame; 400, adjustable eccentric wheel; 401, ratchet module; 4011, positioning pin; 402, rotating shaft; 403, wheel disc; 4031, rib; 404, positioning hoop; 4041, limit buckle; 405, damping air cylinder; 406, ratchet; 407, counterweight module; 4071, clamping unit; 4072, lead rod; 500, bearing detection frame; 600, radial pulling mechanism; 601, secondary wheel; 602, adjustment platform; 603, main wheel. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figures 1 to 7 As shown, the present invention provides a rolling bearing fault diagnosis simulation experimental device, which includes a driving machine 100 and a reduction gearbox 200 connected thereto, and also includes a conventional bearing frame 300 and a bearing detection frame 500 installed on a test bench. The conventional bearing frame 300 is installed with a common bearing, and the bearing detection frame 500 is installed with an experimental bearing.

[0040] The conventional bearing frame 300, the bearing detection frame 500, and the reduction gearbox 200 are coaxially connected, and an adjustable eccentric wheel 400 is installed between the main shafts of the conventional bearing frame 300 and the bearing detection frame 500. The adjustable eccentric wheel 400 is used to apply radial force to the main shaft between the conventional bearing frame 300 and the bearing detection frame 500 in a directional or non-directional manner;

[0041] The end of the main shaft is also connected to a radial pulling mechanism 600 for applying a directional radial force.

[0042] The adjustable eccentric wheel 400 is provided with a counterweight block for applying radial pressure to the main shaft. The faster the rotation speed, the greater the radial pressure applied, and the radial force here is not always in one direction, but is continuously adjusted as the main shaft rotates. In addition, the correspondence between the eccentric counterweight of the adjustable eccentric wheel 400 and the radial direction of the main shaft can also be adjusted. When the radial direction of the pressure applied by the eccentric counterweight corresponds to the damaged position, it is possible to continuously apply pressure to the damaged position, amplifying the soundprint signal or vibration signal, etc. At this time, the eccentric counterweight and the damaged position can maintain radial alignment during rotation, and the machine can be stopped to mark the position to confirm the approximate damage position before switching to the next position for testing.

[0043] The radial pulling mechanism 600 is used to apply radial force in a single direction to the main shaft, which is equivalent to applying a load, simulating a normal use environment to capture its damage signal.

[0044] like Figure 5 and Figure 6 As shown, the adjustable eccentric wheel 400 includes two disc units mounted on the main shaft. The two disc units are spliced ​​into a disc as a whole by bolts, and a counterweight module 407 is installed between the two units to increase the eccentric counterweight.

[0045] The adjustable eccentric wheel 400 can rotate along with the main shaft.

[0046] The counterweight module 407 is used to add an eccentric counterweight, thereby offsetting the center of the wheel disc 403. This allows radial force to be applied to the main shaft during rotation. The counterweight module 407 is a detachable structure on the wheel disc 403 and can be set to an adjustable installation position.

[0047] like Figure 6 As shown, the counterweight module 407 is composed of two clamping units 4071 and a lead rod 4072 clamped in the middle. The two clamping units 4071 are respectively fixed on the wheel disc 403, and the lead rod 4072 is pressed inside by the splicing of the wheel disc 403.

[0048] The counterweight module 407 is used to assemble the lead rod 4072 , and the outer end of the inner hole is provided with an inner step that abuts against the end of the lead rod 4072 .

[0049] The counterweight module 407 clamps a lead rod 4072 between two clamping units 4071. The clamping units 4071 provide the primary counterweight. The lead rod can be replaced with other counterweight materials. Steps are provided at the ends of the clamping units 4071 to prevent the lead rod 4072 from being thrown out during high-speed rotation. These steps only need to be provided at the outer ends. The clamping units 4071 are mounted on the wheel disc 403 using screws or locating pins.

[0050] like Figure 6As shown, the inner surface of the wheel disc 403 is provided with two ribs for accurately inserting the counterweight module 407.

[0051] A counterweight module 407 is installed between the two ribs 4031. Multiple ribs can be provided on the inner side of the wheel disc 403 as needed to meet different adaptation requirements.

[0052] like Figure 3-Figure 5 As shown, the adjustable eccentric wheel 400 also includes two rotating shafts 402, which rotate the wheel disc 403 on the main shaft;

[0053] The ratchet module 401 is keyed to the main shaft and disposed between the two rotating shafts 402;

[0054] A positioning hoop 404 is fixed between the two disc units of the wheel disc 403;

[0055] The damping cylinder 405 and the ratchet 406 are engaged with the ratchet of the ratchet module 401. The damping cylinder 405 is movably mounted on the positioning hoop 404 and the piston rod end is movably connected to the ratchet 406 to prevent the ratchet 406 from rotating.

[0056] The ratchet module 401 rotates along the rotation direction of the main shaft, that is, along the rotatable direction of the ratchet teeth 406 .

[0057] The rotation of the ratchet module 401 and the ratchet 406 is a clockwise rotation, and the wheel 403 is installed on the main shaft, so the wheel 403 drives the ratchet 406 and the damping cylinder 405 to rotate through the ratchet module 401. When the ratchet 406 engages with the ratchet module 401, the ratchet module 401 can push the ratchet 406 to cooperate with the damping cylinder 405 to drive the wheel 403 to rotate synchronously. In this way, a temporarily relatively stable relative position between the wheel 403 and the main shaft is obtained, and this position can be mapped to the detection bearing. If there is a problem with the bearing detection at this time, the machine can be stopped to mark the mapping position of the counterweight module 407 on the wheel 403 on the bearing to obtain the approximate area of ​​damage.

[0058] However, this stable state will eventually become dislocated due to the ratchet module 401 overcoming the elastic force of the ratchet teeth 406, and the relative position of the wheel disc 403 and the main shaft will change. As a result, the position mapped on the bearing will also change, so that pressure can be applied to different positions of the bearing.

[0059] like Figure 4 and Figure 5 As shown, the ratchet module 401 is provided with two ratchet units, the two ratchet units have the same specifications, and the teeth between the two ratchet units are staggered;

[0060] The two ratchet units are connected and assembled into a ratchet module 401 through a positioning pin 4011;

[0061] The damping cylinder 405 and the ratchet 406 are provided in two groups and act on the two ratchet units respectively.

[0062] The staggered arrangement between the two ratchet units can further subdivide the unit angle when the ratchet teeth 406 and the ratchet module 401 cooperate, and can more precisely identify the damaged area.

[0063] And at this time, a stable cooperation between the two modules can be formed, such as Figure 5 As shown, the black area on the ratchet module 401 and the black ratchet teeth 406 form a group, while the shaded ratchet teeth 406 and the ratchet module 401 form a group. The black group, rotated to the top, is engaged, while the other group has disengaged. Therefore, with each deflection, one group engages while the other returns to its initial position and waits. Once the first group disengages, the other group can quickly engage the ratchet module 401 and lock into place, repeating the cycle.

[0064] Compared to a single set, the double set configuration provides the ratchet 406 with more standby time, allowing it to fully reset and form a new lock with the ratchet module 401. However, a single set may not reset in time when the speed is too high.

[0065] like Figure 5 As shown, the damping air cylinder 405 is provided with an air port at the tail end of the cylinder body, and a one-way valve disc is provided in the air port. The one-way valve disc has a faster speed when the air is taken in inward and a slower speed when the air is discharged outward;

[0066] A limit buckle 4041 is further provided on the positioning collar 404 to limit the rotation range of the ratchet 406 .

[0067] This design of the damping cylinder 405 significantly slows its retraction speed, allowing it to remain in contact with a tooth of the ratchet module 401 for a long period of time, locking the angle at that time and applying radial pressure to the bearing at that angle. The damping cylinder 405 extends very quickly, allowing for rapid resetting.

[0068] like Figure 7 As shown, the radial pulling mechanism 600 includes a secondary wheel 601 connected to the output shaft end of the bearing detection frame 500, an adjustment platform 602 and a main wheel 603 installed on the test bench, and the secondary wheel 601, the adjustment platform 602 and the main wheel 603 are connected by a pulley transmission. The adjustment platform 602 includes a height adjustment groove and a top support wheel for adjusting the tightness of the belt.

[0069] The belt's tightness is adjusted by adjusting the height of the top support wheel on the adjustment platform 602, thereby applying varying pressures to the main shaft, thereby simulating load adjustment. The entire radial pull mechanism 600 rotates passively, forming a good fit with the adjustable eccentric wheel 400.

[0070] like Figure 1 As shown, the bearing detection frame 500 is provided with mounting holes for assembling the vibration sensor and the sound collector.

[0071] The bearing detection frame 500 has reserved mounting locations for a vibration sensor and a sound collector, both of which can be installed simultaneously. By collecting the soundprint or vibration spectrum corresponding to the rotational position of the counterweight module 407, the bearing fault position can be confirmed, and the machine can be stopped, marked, or directly inspected.

[0072] The working principle and use process of the present invention:

[0073] The adjustable eccentric wheel 400 applies radial pressure to the spindle. The faster the rotation, the greater the radial pressure applied. This radial force is not always in one direction, but is continuously adjusted as the spindle rotates. Furthermore, the correspondence between the eccentric weight of the adjustable eccentric wheel 400 and the radial direction of the spindle can also be adjusted. When the radial direction of the pressure applied by the eccentric weight corresponds to the location of damage, continuous pressure is applied to the damaged location, amplifying the soundprint signal or vibration signal.

[0074] The rotation of the ratchet module 401 and the ratchet 406 is a clockwise rotation, and the wheel 403 is rotatably mounted on the main shaft, so the wheel 403 drives the ratchet 406 and the damping cylinder 405 to rotate through the ratchet module 401. When the ratchet 406 engages with the ratchet module 401, the ratchet module 401 can push the ratchet 406 to cooperate with the damping cylinder 405 to drive the wheel 403 to rotate synchronously. In this way, a temporarily relatively stable relative position between the wheel 403 and the main shaft is obtained, and this position can be mapped to the detection bearing. If there is a problem with the bearing detection at this time, the machine is stopped to mark the mapping position of the counterweight module 407 on the wheel 403 on the bearing, and the approximate area of ​​damage can be obtained.

[0075] By configuring a dual set of ratchet modules 401, damping cylinders 405, and ratchet teeth 406, during each deflection, one set engages while the other returns to its initial position and waits. Once the first set disengages, the other can quickly engage the ratchet module 401 and lock into place. Compared to a single set, the ratchet teeth 406 have more time to wait. They can fully reset and form a new lock with the ratchet module 401. Furthermore, the damping cylinder 405 can extend the retention time at a specific angle, enabling voiceprint collection or vibration signal capture.

[0076] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0077] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rolling bearing fault diagnosis simulation experimental device, comprising a driving machine (100) and a reduction gearbox (200) connected thereto, characterized in that: It also includes a conventional bearing frame (300) and a bearing detection frame (500) installed on the experimental table, wherein the conventional bearing frame (300) is installed with a common bearing, and the bearing detection frame (500) is installed with an experimental bearing; The conventional bearing frame (300), the bearing detection frame (500), and the reduction gear box (200) are coaxially connected, and an adjustable eccentric wheel (400) is installed between the main shafts of the conventional bearing frame (300) and the bearing detection frame (500), and the adjustable eccentric wheel (400) is used to apply radial force to the main shaft between the conventional bearing frame (300) and the bearing detection frame (500) in a directional or non-directional manner; The end of the main shaft is also connected to a radial pulling mechanism (600) for applying a directional radial force.

2. A rolling bearing fault diagnosis simulation experimental device according to claim 1, characterized in that: The adjustable eccentric wheel (400) comprises two disc units mounted on a main shaft, the two disc units being spliced ​​into a disc unit by bolts, and a counterweight module (407) being mounted between the two units for increasing the eccentric counterweight. The adjustable eccentric wheel (400) can rotate along with the main shaft.

3. The rolling bearing fault diagnosis simulation experimental device according to claim 2, characterized in that: The counterweight module (407) is composed of two clamping units (4071) and a lead rod (4072) clamped in the middle. The two clamping units (4071) are respectively fixed on the wheel disc (403). The lead rod (4072) is pressed inside by the splicing of the wheel disc (403). The counterweight module (407) is used to assemble the lead rod (4072), and the outer end of the inner hole is provided with an inner step that abuts against the end of the lead rod (4072).

4. The rolling bearing fault diagnosis simulation experimental device according to claim 3, characterized in that: The inner surface of the wheel disc (403) is provided with two ribs for accurately inserting the counterweight module (407).

5. A rolling bearing fault diagnosis simulation experimental device according to any one of claims 2 to 4, characterized in that: The adjustable eccentric wheel (400) further comprises two rotating shafts (402), wherein the rotating shafts (402) rotatably mount the wheel disc (403) on the main shaft; A ratchet module (401) is keyed to the main shaft and disposed between the two rotating shafts (402); A positioning hoop (404) is fixed between the two disc units of the wheel disc (403); A damping air cylinder (405) and a ratchet (406), wherein the ratchet (406) engages with the ratchet of the ratchet module (401), the damping air cylinder (405) is movably mounted on the positioning hoop (404), and the piston rod end is movably connected to the ratchet (406) to block the rotation of the ratchet (406); The ratchet module (401) rotates along the rotation direction of the main shaft, that is, along the rotation direction of the ratchet teeth (406).

6. The rolling bearing fault diagnosis simulation experimental device according to claim 5, characterized in that: The ratchet module (401) is provided with two ratchet units, the two ratchet units have the same specifications, and the teeth between the two ratchet units are staggered; The two ratchet units are plugged and assembled into a ratchet module (401) through a positioning pin (4011); The damping air cylinder (405) and ratchet (406) are provided in two groups and act on two ratchet units respectively.

7. The rolling bearing fault diagnosis simulation experimental device according to claim 6, characterized in that: The damping air cylinder (405) is provided with an air port at the rear end of the cylinder body, and a one-way valve disc is provided in the air port. The one-way valve disc has a faster speed when taking air inward and a slower speed when venting air outward; The positioning hoop (404) is also provided with a limit buckle (4041) for limiting the rotation range of the ratchet (406).

8. The rolling bearing fault diagnosis simulation experimental device according to claim 1, characterized in that: The radial pulling mechanism (600) includes a secondary wheel (601) connected to the output shaft end of the bearing detection frame (500), an adjustment platform (602) and a main wheel (603) installed on the test bench, and the secondary wheel (601), the adjustment platform (602) and the main wheel (603) are connected by a pulley transmission, and the adjustment platform (602) includes a height adjustment groove and a top support wheel for adjusting the tightness of the belt.

9. The rolling bearing fault diagnosis simulation experimental device according to claim 1, characterized in that: The bearing detection frame (500) is provided with mounting holes for assembling a vibration sensor and a sound collector.

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