A bearing cage motion state monitoring device and a monitoring method

Abstract

The application provides a bearing retainer motion state monitoring device and a monitoring method, which comprises a test main body, a driving assembly and a monitoring assembly; the test main body comprises a circular-arc outer baffle and a circular-arc inner baffle, the inner baffle and the outer baffle are arranged with the same center, and a test raceway for accommodating the retainer and the rollers is formed between the inner baffle and the outer baffle; the driving assembly is used for driving the inner baffle, the retainer and the rollers to move together relative to the outer baffle; and the monitoring assembly is used for monitoring the state of the retainer and the rollers in the movement process. Through the device, the no-load rotary motion of the single-stage retainer can be simulated, the motion state of the retainer can be monitored, it can be confirmed whether the retainer is qualified in advance before assembly, and the quality of the rotary bearing after assembly can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing detection, in particular to a bearing retainer motion state monitoring device and monitoring method, more particularly to a turntable bearing retainer motion state monitoring device and monitoring method. BACKGROUND

[0002] The rollers in the bearing are distributed along the circumference of the raceway, and the retainer is an important component for isolating adjacent rollers, limiting the position of the rollers, and guiding the motion of the rollers in the bearing, and the quality of the retainer directly affects the wear of the retainer itself and the rollers. Abnormal wear of the retainer may cause the retainer to break, thereby causing the bearing to fail; and abnormal wear of the retainer is accompanied by abnormal increase of heat and iron filings and abrasive particles inside the bearing, thereby increasing the wear of the bearing rollers and raceways and reducing the service life.

[0003] At present, the research on the rotation performance of the turntable bearing is generally based on the whole turntable bearing, and the performance test is carried out as a whole after assembly. The research object is the starting torque, running torque, vibration, noise and other performances of the whole bearing, and the research object does not include the motion state information of the retainer, and it cannot be confirmed whether the retainer will jam the rotation of the roller and cause abnormal wear.

[0004] The existing monitoring device related to the retainer generally studies the rolling bearing as a whole, installs the whole bearing on the monitoring device, and cooperates with the sensor to monitor the motion state of the retainer, including monitoring the rotation speed of the retainer, inputting the driving speed to calculate the theoretical rotation speed of the retainer, and comparing the actual rotation speed with the theoretical rotation speed to obtain the slip rate of the retainer; monitoring the axial and radial displacement of the retainer during the motion, and indirectly obtaining the motion trajectory, inclination angle and skew angle of the mass center of the retainer; and determining the stability and motion mechanism of the retainer by studying these monitoring data.

[0005] The existing monitoring device for the retainer is only applicable to small bearings, and is mainly focused on the slip research of small rolling bearings. However, the turntable bearing is a type of bearing with low speed and heavy load, and it is not meaningful to study the high-speed slip. At the same time, the existing monitoring device cannot confirm whether the retainer will jam the rotation of the roller and cause abnormal wear. In addition, since the retainer of the turntable bearing includes multiple segments, it is important to test the torque of the retainer during operation and the influence of the retainer on the rolling of the roller before assembly, and to confirm the quality of the retainer in advance.

[0006] In summary, there is an urgent need for a bearing retainer motion state monitoring device and monitoring method to solve the problems in the prior art. SUMMARY

[0007] The application aims to provide a bearing cage movement state monitoring device, and aims to solve the problem that the single segment cage of the rotating disc bearing cannot be monitored and whether the cage is stuck or not cannot be determined in the prior art.

[0008] The bearing cage movement state monitoring device comprises a test main body, a driving assembly and a monitoring assembly; the test main body comprises an outer baffle and an inner baffle in the shape of a circular arc, the inner baffle and the outer baffle are arranged with the same center, and a test raceway for accommodating the cage and the rollers is formed between the inner baffle and the outer baffle; the driving assembly is used for driving the inner baffle, the cage and the rollers to move together relative to the outer baffle; and the monitoring assembly is used for monitoring the state of the cage and the rollers in the movement process.

[0009] In the above technical solution, the upper side and the lower side of the inner baffle are both provided with a plurality of roller assemblies along the circumferential direction, wherein the roller assemblies on the upper side are in rolling contact with the upper side of the outer baffle, and the roller assemblies on the lower side are in rolling contact with the lower side of the outer baffle.

[0010] At least one end of the inner baffle in the circumferential direction is detachably provided with an end block.

[0011] In the above technical solution, the roller assembly comprises a side assembly and a first roller, the side assembly is arranged on the inner baffle, and the first roller is arranged on the side assembly and in rolling contact with the outer baffle.

[0012] In the above technical solution, a clamping assembly is further included, the clamping assembly comprises a plurality of clamping jaws, and adjacent clamping jaws are connected through connecting rods.

[0013] The clamping jaw comprises an inner side connecting rod assembly, an outer side connecting rod assembly, a spring assembly, a second roller and a middle screw rod; the inner side connecting rod assembly and the outer side connecting rod assembly are arranged in parallel, the middle part between the two is connected through the middle screw rod, the upper part between the two is connected through the spring assembly, the lower end of the inner side connecting rod assembly is connected with a connecting ring on the inner side surface of the inner baffle, the lower end of the outer side connecting rod assembly is provided with the second roller, and the second roller is arranged in a guide raceway on the outer side surface of the outer baffle in a rolling manner.

[0014] In the above technical solution, the spring assembly comprises a spring and an adjusting stud, the upper ends of the inner side connecting rod assembly and the outer side connecting rod assembly are both provided with threaded through holes, the two ends of the spring are connected with the adjusting studs, and the two adjusting studs at the two ends are connected with the two threaded through holes respectively.

[0015] In the above technical solution, the driving assembly comprises a rack, a motor, a transmission group and a gear, the inner side surface of the inner baffle is provided with a rack in the shape of a circular arc, the output end of the motor is connected with the gear through the transmission group, and the gear is engaged with the rack.

[0016] Preferably in the above technical solution, the monitoring assembly comprises photosensitive sensors, a plurality of photosensitive sensors are arranged on the inner baffle along the circumferential direction, and the photosensitive sensors are arranged one-to-one with the rollers in the retainer; a piece of fluorescent block is embedded in the roller along the generatrix direction, and the monitoring end of the photosensitive sensor is arranged opposite to the roller.

[0017] Preferably in the above technical solution, a tapered wedge hole is arranged on the inner baffle, the photosensitive sensor is arranged in the tapered wedge hole through a mounting block, an end of the mounting block close to the roller is provided with a baffle edge distributed on both sides of the roller, and an end of the mounting block away from the roller is provided with a dismounting threaded hole.

[0018] Preferably in the above technical solution, the monitoring assembly further comprises a proximity switch, a torque sensor, a noise sensor and a vibration sensor; the torque sensor is used for monitoring the output torque of the driving assembly; the noise sensor and the vibration sensor are both arranged on the retainer and are respectively used for monitoring the noise and vibration in the movement process; the proximity switch is arranged on the inner side surface of the outer baffle and is used for limiting the movement stroke of the inner baffle.

[0019] The application further provides a bearing retainer movement state monitoring method, which adopts the bearing retainer movement state monitoring device and specifically comprises the following steps:

[0020] The qualified retainer is taken as a sample and is put into the monitoring device to simulate movement, so as to obtain the motor output torque m1 and the motor speed n1 in uniform motion; the test retainer is put into the monitoring device to simulate movement, so as to obtain the motor output torque m2 at the motor speed n1, and if m2 exceeds 110% of m1, it is considered that the test retainer has an abnormal movement state;

[0021] The actual signal frequency collected by the photosensitive sensor is compared with the theoretical signal frequency, and if the actual signal frequency is lower than 95% of the theoretical signal frequency, it is considered that the eyelet of the roller corresponding to the photosensitive sensor is stuck;

[0022] The actual signal frequencies collected by different photosensitive sensors in the same time are compared, so as to obtain the position with relatively poor quality in each eyelet of the test retainer;

[0023] If the motor output torque, vibration and noise of the test retainer respectively exceed 110% of the motor output torque, vibration and noise of the sample retainer in uniform motion at the same speed, but the actual signal frequency collected by the photosensitive sensor is more than 95% of the theoretical signal frequency, it is considered that the radius or / and the leg of the side surface of the test retainer is unqualified.

[0024] The technical solution of the application has the following beneficial effects:

[0025] The application can realize the simulation of the no-load rotation of the single-section retainer and the monitoring of the motion state of the retainer by the test body, the driving assembly and the monitoring assembly; the clamping assembly is used to clamp the outer baffle and the inner baffle to ensure that the rollers are attached to the inner and outer baffles and avoid the rollers from not rotating due to the non-contact of the rollers and the retainer, thereby affecting the monitoring result; the rollers are embedded with fluorescent blocks, and the non-contact rotation monitoring of the rollers is realized by cooperating with the photosensitive sensor, the motion data of the rollers is collected, the theoretical rotating speed of the rollers is obtained by calculation, the influence of the retainer on the rolling of the rollers is obtained by comparing the theoretical rotating speed with the actual rotating speed collected by the photosensitive sensor, whether the retainer is stuck with the rollers is confirmed, and the position of the relatively poor movement of the pockets on the retainer is confirmed; the device can confirm whether the retainer is qualified before assembly, thereby ensuring the quality of the rotary bearing after assembly and reducing the rework of assembly.

[0026] In addition to the objects, features, and advantages described above, the present application has other objects, features, and advantages. The present application will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate embodiments of the application and assist in explaining the application. In the drawings:

[0028] Figure 1 is a schematic view of the overall structure of the monitoring device;

[0029] Figure 2 is a schematic view of the structure of the test body;

[0030] Figure 3 is a sectional view of the test body;

[0031] Figure 4 is a schematic view of the structure of the clamping assembly;

[0032] Figure 5 is a sectional view of the clamping jaw;

[0033] Figure 6 is a schematic view of the structure of the driving assembly;

[0034] Figure 7 is a schematic view of the photosensitive sensor monitoring the rollers;

[0035] Figure 8 is a schematic view of the arrangement of the noise sensor and the vibration sensor on the retainer;

[0036] In the drawings: 1, test body, 2, clamping assembly, 3, driving assembly, 4, monitoring assembly, 5, retainer, 6, roller;

[0037] 1-1, outer baffle, 1-1-1, guide raceway, 1-2, inner baffle, 1-3, side stop, 1-4, connecting ring, 1-5, first bolt, 1-6, mounting seat, 1-7, second bolt, 1-8, first roller, 1-9, shaft end cover, 1-10, end stop, 2-1, connecting rod, 2-2, third bolt, 2-3, outer connecting rod, 2-4, spring assembly, 2-5, outer screw rod, 2-6, second roller, 2-7, inner connecting rod, 2-8, inner screw rod, 2-9, middle screw rod, 3-1, rack, 3-2, motor, 3-3, worm wheel, 3-4, worm, 3-5, gear, 4-1, photosensitive sensor, 4-2, mounting block, 4-2-1, baffle, 4-2-2, disassembly threaded hole, 4-3, proximity switch, 4-4, torque sensor, 4-5, noise sensor, 4-6, vibration sensor, 6-1, fluorescent block. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, the present application will be described more fully below, and preferred embodiments of the present application will be given. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0040] Example 1:

[0041] Reference Figures 1-8 A bearing retainer motion state monitoring device, in particular a retainer motion state monitoring device for a rotating disc bearing, comprising a test main body 1, a driving assembly 3 and a monitoring assembly 4; the test main body 1 comprises a circular arc-shaped outer baffle 1-1 and an inner baffle 1-2, the inner baffle 1-2 and the outer baffle 1-1 are arranged with the same center and a test raceway accommodating the retainer 5 and the roller 6 is formed between the inner baffle 1-2 and the outer baffle 1-1, the test raceway simulates the raceway during the working process of the retainer and the roller, the outer baffle is equivalent to the outer ring of the bearing, and the inner baffle is equivalent to the inner ring of the bearing; the driving assembly 3 is used to drive the inner baffle 1-2, the retainer 5 and the roller 6 to move together relative to the outer baffle 1-1; the monitoring assembly 4 is used to monitor the state of the retainer 5 and the roller 6 during the movement.

[0042] Further, the upper side and the lower side of the inner baffle plate 1-2 are both provided with a plurality of roller assemblies along the circumferential direction (referring to the circumferential direction of the inner baffle plate), wherein the roller assembly on the upper side is in rolling contact with the upper side of the outer baffle plate 1-1, and the roller assembly on the lower side is in rolling contact with the lower side of the outer baffle plate 1-1, that is, the inner baffle plate and the outer baffle plate are in rolling contact through the roller assembly, the rolling contact has smaller movement resistance, and can reduce wear.

[0043] Referring to Figure 3 , the roller assembly comprises a side block 1-3, a mounting seat 1-6, and a first roller 1-8, the side block 1-3 is arranged on the upper side or the lower side of the inner baffle plate 1-2, the first roller 1-8 is arranged on the side block 1-3 through the mounting seat 1-6, and the first roller 1-8 is in rolling contact with the upper side or the lower side of the outer baffle plate 1-1.

[0044] In the embodiment, the upper side and the lower side of the inner baffle plate are both provided with three roller assemblies.

[0045] For example, the roller assembly on the upper side of the inner baffle plate in Figure 3 , the side block 1-3 is fixedly arranged on the upper side of the inner baffle plate through a first bolt 1-5, the mounting seat 1-6 is fixedly arranged on the side block 1-3 through a second bolt 1-7, and the first roller 1-8 is arranged on the mounting seat 1-6 and limited by an axle end cover 1-9. The structure can ensure the structural stability of the roller assembly, and avoid unnecessary friction between the inner baffle plate and the outer baffle plate.

[0046] Referring to Figure 3 , a boss is arranged on the inner side of the outer baffle plate to support the retainer 5, so that the roller assembly on the lower side of the inner baffle plate is slightly different from the roller assembly on the upper side, and the mounting seat and the side block in the roller assembly on the lower side are fixed on the inner baffle plate through a bolt.

[0047] In the embodiment, the test track is formed by the inner side of the outer baffle plate, the upper side of the boss, the outer side of the inner baffle plate, and the lower side of the side block in the upper roller assembly.

[0048] As can be understood by those skilled in the art, the test track can also have other structural forms besides the arrangement in the embodiment, for example, two recessed grooves of different sizes are arranged on the inner side of the outer baffle plate, the small-size recessed groove is arranged below the large-size recessed groove, the small-size recessed groove is used to accommodate the roller, and the large-size recessed groove is used to accommodate the retainer, and then the opening side of the large-size recessed groove is blocked by the inner baffle plate, which is also feasible. In this structural form, the inner baffle plate and the outer baffle plate can adopt the roller (i.e. rolling friction) to realize relative movement, or can adopt the form of the sliding block (i.e. sliding friction) to realize relative movement.

[0049] It should be further explained that the structure of the test raceway is not limited to the one described in the embodiment, and the contact between the inner baffle and the outer baffle can be rolling contact or sliding contact.

[0050] Referring to Figure 2 , at least one end of the inner baffle 1-2 in the circumferential direction is detachably provided with an end block 1-10, and the cage and the rollers are loaded into the test raceway together by detaching the end block. After the end block is installed, the cage is limited and moves with the inner baffle.

[0051] As known by those skilled in the art, the inner baffle should limit the cage at both ends in the circumferential direction. When one end is provided with a detachable end block, the other end can be provided with a limiting block integrally formed with the inner baffle. Of course, both ends can also be provided with detachable end blocks.

[0052] Referring to Figure 1 , Figure 4 and Figure 5 , the bearing cage movement state monitoring device further comprises a clamping assembly 2, and the clamping assembly 2 comprises a plurality of clamping jaws, and adjacent clamping jaws are connected by connecting rods 2-1.

[0053] The clamping jaw comprises an inner side link assembly, an outer side link assembly, a spring assembly 2-4, a second roller 2-6 and a middle screw rod 2-9. The inner side link assembly and the outer side link assembly are arranged in parallel, and the middle part between the two is connected by the middle screw rod 2-9, and the upper part between the two is connected by the spring assembly 2-4. The lower end of the inner side link assembly is connected with the connecting ring 1-4 on the inner side surface of the inner baffle 1-2, and the lower end of the outer side link assembly is provided with the second roller 2-6, which is arranged in the guide raceway 1-1-1 on the outer side surface of the outer baffle 1-1.

[0054] The spring assembly 2-4 comprises a spring and an adjusting stud, and the upper end of the inner side link assembly and the outer side link assembly is provided with a threaded hole. The two ends of the spring are connected with the adjusting studs, and the two adjusting studs at the two ends are connected with the two threaded holes respectively.

[0055] In the inner side link assembly and the outer side link assembly, one of them is provided with a threaded hole in the middle part, and the other is provided with a counterbore hole. After the middle screw rod is installed in the counterbore hole, it is connected with the threaded hole. By screwing the middle screw rod, the distance between the inner side link assembly and the outer side link assembly can be adjusted. Therefore, the distance between the inner side link assembly and the outer side link assembly can be flexibly adjusted according to the thickness of the outer baffle and the inner baffle. By screwing the adjusting stud to change the compression amount of the spring and thus the spring force, the reaction force generated by the clamping of the inner side link assembly and the outer side link assembly on the outer baffle and the inner baffle can be balanced.

[0056] Specifically, the inner side link assembly includes an inner link 2-7 and an inner screw rod 2-8, wherein the inner screw rod is threadedly connected with the lower end of the inner link, and the inner screw rod is connected with the connecting ring 1-4 through a nut; the outer side link assembly includes an outer link 2-3 and an outer screw rod 2-5, wherein the outer screw rod 2-5 is threadedly connected with the lower end of the outer link, and the outer screw rod 2-5 is provided with a second roller 2-6; wherein the middle screw rod and the spring assembly are both mounted on the inner link and the outer link.

[0057] In the embodiment, three clamping jaws are provided, and the connecting rod 2-1 is connected with the outer link 2-3 through a third bolt 2-2; the clamping assembly can clamp the outer baffle and the inner baffle to prevent radial movement therebetween and ensure that the outer baffle and the inner baffle are in good contact with the rollers.

[0058] Referring to Figure 1 and Figure 6 , the driving assembly 3 includes a rack 3-1, a motor 3-2, a transmission set and a gear 3-5, the inner side surface of the inner baffle 1-2 is provided with a circular-arc-shaped rack 3-1, the output end of the motor 3-2 is connected with the gear 3-5 through the transmission set, and the gear 3-5 is engaged with the rack 3-1.

[0059] The transmission set includes a worm wheel 3-3 and a worm 3-4, wherein the worm wheel 3-3 is mounted on the output end of the motor, and the gear 3-5 is connected at the end of the worm, and the worm wheel and the worm transmission are stable, which is conducive to accurately monitoring the state of the retainer and the rollers. In the embodiment, the motor is a speed-reducing motor, an encoder is built-in to feedback the angular displacement of the motor shaft, and the motor speed is indirectly obtained by combining time.

[0060] Referring to Figure 7 , the monitoring assembly 4 includes a photosensitive sensor 4-1, a plurality of photosensitive sensors 4-1 are arranged on the inner baffle 1-2 along the circumferential direction, and the photosensitive sensors 4-1 are arranged one-to-one with the rollers in the retainer; the roller 6 is embedded with a fluorescent block 6-1 along the generatrix direction, and the monitoring end of the photosensitive sensor 4-1 is aligned with the roller 6, and the rotation number of the roller is recorded by the photosensitive sensor. The cooperation of the fluorescent block and the photosensitive sensor can accurately record the rotation number of the roller, and the rotation difference between the rollers can be obtained by comparing the recording data of each photosensitive sensor.

[0061] Further, the inner baffle 1-2 is provided with a tapered wedge hole, and the photosensitive sensor 4-1 is arranged in the tapered wedge hole through a mounting block 4-2. The tapered wedge hole can realize self-tightening of the mounting block 4-2 on the inner baffle and realize quick alignment of the mounting block. Preferably, the mounting block 4-2 is provided with a stop edge 4-2-1 distributed on both sides of the roller (i.e. both sides in the roller axis direction) at one end close to the roller, so as to prevent the photosensitive sensor from receiving light from the fluorescent block on the adjacent roller and causing false counting. The mounting block 4-2 is provided with a dismounting threaded hole 4-2-2 at one end away from the roller, and the mounting block can be taken out of the tapered wedge hole by screwing a screw into the dismounting threaded hole and knocking the screw.

[0062] Referring to Figure 1 , Figure 6 and Figure 8 , the monitoring assembly 4 further comprises a proximity switch 4-3, a torque sensor 4-4, a noise sensor 4-5 and a vibration sensor 4-6. The torque sensor 4-4 is used to monitor the output torque of the driving assembly 3, and is mounted on the end of the worm. The noise sensor 4-5 and the vibration sensor 4-6 are both arranged on the cage and are respectively used to monitor the noise and vibration during movement, as shown in Figure 8 . The noise sensor and the vibration sensor are arranged on the surface of the cage and can be flexibly adjusted according to actual conditions in addition to the mounting positions shown in Figure 8 . The proximity switch 4-3 is arranged on the inner side of the outer baffle 1-1 and is used to limit the movement stroke of the inner baffle. Specifically, the proximity switch is arranged at both ends of the inner side of the outer baffle.

[0063] Preferably, the first roller and the second roller in the embodiment are both bearings.

[0064] The embodiment further provides a method for monitoring the movement state of the cage by using the above monitoring device, and the method comprises the following steps:

[0065] When the driving assembly drives the inner baffle, the cage and the roller to move at a uniform speed, the torque sensor value is the running friction torque of the monitoring device. Therefore, a qualified cage is taken as a sample, is put into the monitoring device to perform movement simulation, and the motor output torque m1 and the motor speed n1 during uniform movement are obtained. The test cage is put into the monitoring device to perform movement simulation, and the motor output torque m2 at the motor speed n1 is obtained. If m2 exceeds 110% of m1, it is considered that the movement state of the test cage is abnormal. Similarly, vibration and noise data can also be compared to assist in analyzing the movement state.

[0066] The encoder feedback motor shaft speed is V1 (rad / s); the worm gear (i.e., transmission group) transmission ratio is k1, and the gear rack transmission ratio is k2; the inner side surface outer diameter of the inner baffle in contact with the roller is R1 (mm), and the roller radius is R2 (mm);

[0067] The rack speed is:

[0068] V2 (rad / s) = k1 * k2 * V1;

[0069] The inner baffle is rigidly connected with the rack, and the speeds of the two are equal, so the linear speed of the inner side surface of the inner baffle in contact with the roller is:

[0070] V3 (mm / s) = 2 * π * R1 * V2;

[0071] The theoretical speed of the roller is:

[0072]

[0073] The theoretical signal frequency of the photosensitive sensor is (persons skilled in the art know that the calculation of the theoretical signal frequency is related to the structure of the device, and the expression of the theoretical signal frequency of the device of different structures and different transmission modes will be different, but the theoretical signal frequency is always equal to the theoretical speed of the roller):

[0074] f (Hz) = n;

[0075] By comparing the actual acquisition signal frequency of the photosensitive sensor with the theoretical signal frequency, if the actual acquisition signal frequency is lower than 95% of the theoretical signal frequency, the roller corresponding to the photosensitive sensor is considered to be a cage hole stuck roller.

[0076] By comparing the actual acquisition signal frequencies of different photosensitive sensors at the same time, the positions of the test cage with relatively poor quality in each cage hole are obtained (here, the quality refers to whether the cage hole will be stuck with the roller, and if the roller rotates smoothly, the quality is considered to be good, and if one or more rollers rotate worse than the other rollers of the test cage, the quality of the one or more cage holes is considered to be poor).

[0077] If the motor output torque, vibration and noise of the test cage exceed 110% of the motor output torque, vibration and noise of the sample cage under uniform motion at the same speed, but the actual acquisition signal frequency of the photosensitive sensor is more than 95% of the theoretical signal frequency, it is considered that the arc or / and the leg of the side surface of the test cage is unqualified.

[0078] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bearing cage motion state monitoring device, characterized by, The test body (1), the driving assembly (3) and the monitoring assembly (4) are included; the test body (1) includes the outer baffle (1-1) and the inner baffle (1-2) in the circular arc shape, the inner baffle (1-2) and the outer baffle (1-1) are arranged with the same center, and the test raceway accommodating the retainer (5) and the roller (6) is formed between the inner baffle (1-2) and the outer baffle (1-1); the driving assembly (3) is used for driving the inner baffle (1-2), the retainer (5) and the roller (6) to move together relative to the outer baffle (1-1); the monitoring assembly (4) is used for monitoring the state of the retainer (5) and the roller (6) in the movement process The monitoring assembly (4) includes the photosensitive sensor (4-1), a plurality of photosensitive sensors (4-1) are arranged on the inner baffle (1-2) along the circumferential direction, and the photosensitive sensor (4-1) is arranged in one-to-one correspondence with the roller in the retainer; The monitoring assembly (4) further includes the proximity switch (4-3), the torque sensor (4-4), the noise sensor (4-5) and the vibration sensor (4-6); the proximity switch (4-3) is arranged on the inner side of the outer baffle (1-1) and is used for limiting the movement stroke of the inner baffle.

2. The bearing cage motion condition monitoring apparatus of claim 1, wherein, The upper side and the lower side of the inner baffle (1-2) are both arranged with a plurality of roller assemblies along the circumferential direction, wherein the roller assembly on the upper side is in rolling contact with the upper side of the outer baffle (1-1), and the roller assembly on the lower side is in rolling contact with the lower side of the outer baffle (1-1); At least one end of the inner baffle (1-2) in the circumferential direction is detachably provided with an end block (1-10).

3. The bearing cage motion condition monitoring apparatus of claim 2, wherein, The roller assembly includes a side assembly and a first roller (1-8), the side assembly is arranged on the inner baffle (1-2), the first roller (1-8) is arranged on the side assembly, and the first roller (1-8) is in rolling contact with the outer baffle (1-1).

4. The bearing cage motion condition monitoring apparatus of claim 1, wherein, Further including a clamping assembly (2), the clamping assembly (2) includes a plurality of clamping jaws, and adjacent clamping jaws are connected through connecting rods (2-1); The clamping jaw includes an inner side link assembly, an outer side link assembly, a spring assembly (2-4), a second roller (2-6) and a middle screw rod (2-9); the inner side link assembly and the outer side link assembly are arranged in parallel, the middle part between the two is connected through the middle screw rod (2-9), the upper part between the two is connected through the spring assembly (2-4), the lower end of the inner side link assembly is connected with the connecting ring (1-4) on the inner side of the inner baffle (1-2), and the lower end of the outer side link assembly is provided with the second roller (2-6), and the second roller (2-6) is arranged in the guide raceway (1-1-1) on the outer side of the outer baffle (1-1) in rolling.

5. The bearing cage motion condition monitoring apparatus of claim 4, wherein, The spring assembly (2-4) includes a spring and an adjusting stud, the upper end of the inner side link assembly and the outer side link assembly is provided with a threaded through hole, and the two ends of the spring are connected with the adjusting studs, and the two adjusting studs at the two ends are connected with the two threaded through holes respectively.

6. The bearing cage motion condition monitoring apparatus of claim 1 wherein, The driving assembly (3) comprises a rack (3-1), a motor (3-2), a transmission set and a gear (3-5), the inner side surface of the inner baffle (1-2) is provided with a circular-arc-shaped rack (3-1), the output end of the motor (3-2) is connected with the gear (3-5) through the transmission set, and the gear (3-5) is engaged with the rack (3-1).

7. Bearing cage movement state monitoring device according to any one of claims 1 to 6, characterized in that The roller (6) is embedded with a piece of fluorescent block (6-1) along the bus direction, and the monitoring end of the photosensitive sensor (4-1) is arranged opposite to the roller (6).

8. The bearing cage motion condition monitoring apparatus of claim 7, wherein, The inner baffle (1-2) is provided with a tapered wedge hole, the photosensitive sensor (4-1) is arranged in the tapered wedge hole through a mounting block (4-2), one end of the mounting block (4-2) close to the roller is provided with a stop edge (4-2-1) distributed on both sides of the roller, and the other end of the mounting block (4-2) away from the roller is provided with a dismounting threaded hole (4-2-2).

9. The bearing cage motion condition monitoring apparatus of claim 7 wherein, The torque sensor (4-4) is used for monitoring the output torque of the driving assembly (3), and the noise sensor (4-5) and the vibration sensor (4-6) are arranged on the retainer and are respectively used for monitoring the noise and the vibration in the movement process.

10. A method of monitoring the motion of a bearing cage, characterized by, The bearing retainer movement state monitoring device is used, and the specific implementation is as follows: The qualified retainer is taken as a sample, is put into the monitoring device for movement simulation, the motor output torque m1 and the motor speed n1 in uniform motion are obtained, the test retainer is put into the monitoring device for movement simulation, the motor output torque m2 at the motor speed n1 is obtained, if m2 exceeds 110% of m1, it is considered that the movement state of the test retainer is abnormal; The actual signal frequency of the photosensitive sensor is compared with the theoretical signal frequency, if the actual signal frequency is lower than 95% of the theoretical signal frequency, it is considered that the cage hole of the roller corresponding to the photosensitive sensor is stuck; The actual signal frequencies of different photosensitive sensors in the same time are compared, and the positions of the cage holes with relatively poor quality of the test retainer are obtained; If the motor output torque, the vibration and the noise of the test retainer respectively exceed 110% of the motor output torque, the vibration and the noise of the sample retainer in uniform motion at the same speed, but the actual signal frequency of the photosensitive sensor is more than 95% of the theoretical signal frequency, it is considered that the radius or / and the side leg of the test retainer is unqualified.

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