CN113776832B - Testing device and method for testing bearing - Google Patents
Testing device and method for testing bearing Download PDFInfo
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- CN113776832B CN113776832B CN202111323014.3A CN202111323014A CN113776832B CN 113776832 B CN113776832 B CN 113776832B CN 202111323014 A CN202111323014 A CN 202111323014A CN 113776832 B CN113776832 B CN 113776832B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a testing device and a testing method for detecting a bearing, which comprise a rack, a correcting component and a testing component, wherein the testing component comprises a supporting frame, a connecting sleeve is arranged on the supporting frame, the connecting sleeve is of a cavity structure, rolling bearings are arranged at two ends of the connecting sleeve, inner rings of the rolling bearings are fixed on a rotating shaft, a testing mold is arranged at one end of the rotating shaft, a plurality of grooves which are distributed in the circumferential direction are arranged on the testing mold, moving blocks are arranged on the grooves, and the moving blocks are used for fixing the surface of the inner ring of the bearing to be tested. The invention realizes the test of the bearings with different inner ring diameters by adjusting the position of the movable block, can simulate the relative displacement of the bearing between the bearing inner ring and the shaft in various temperature scenes by adjusting the position of the movable block, and has guiding significance for the bearing in the actual working scene.
Description
Technical Field
The invention relates to the field of bearing testing, in particular to a testing device and a testing method for testing a bearing.
Background
The rolling bearing is one of the most widely used and most vulnerable parts in the rotary machinery, and the failure of the rolling bearing directly causes about 30% of mechanical faults, so that the development of fault diagnosis and prediction of the rolling bearing has great significance for ensuring safe and stable operation of mechanical equipment, and preventing shutdown, production halt, equipment damage and the like caused by bearing damage. Rolling bearings are subject to failure modes such as improper assembly, poor lubrication, intrusion of moisture or foreign matter, corrosion, and overload fatigue, resulting in fatigue spalling, wear, plastic deformation, corrosion and galvanic corrosion, cracking and fracture, seizure, and cage damage.
Secondly, with the development of modern machines toward high speed, high reliability, low energy consumption, and the like, rolling bearings as transmission components are also required to be developed toward low friction, long life, high rotational speed, and the like. The continuous increase of the rotating speed correspondingly brings a series of problems of aggravation of heat generation caused by friction of the bearing, reduction of fatigue life, slippage of the retainer and the rolling body, damage of the rolling surface, instability of the retainer and the like, and the problems caused by high-speed running of the bearing directly influence the working performance and the service life of the main shaft-bearing system. Particularly, the sudden increase of the heat generated by friction can cause the abnormal rise of the working temperature of the bearing, the temperature distribution of the high-speed bearing is a problem generally concerned by bearing users, and the reasonable lubrication and cooling can be carried out on the bearing only by mastering the temperature distribution and the influence thereof in the bearing system under different working conditions.
In addition, in the design of the new machine, if the heating mechanism, the heat transfer process and the temperature distribution of the bearing transmission system can be predicted, the temperature field of the bearing transmission system under a certain working condition and the parts or parts which are dangerous parts or dangerous parts which have high temperature and are easy to fail are known, so that the design scheme, the process flow or the structural material can be reasonably improved, and the service life and the reliability of the new machine are improved.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a testing device and a testing method for testing a bearing.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a testing device for checking a bearing, which comprises a frame, a correcting component and a testing component,
the correcting assembly is arranged on the side portion of the rack and comprises a supporting rod, a first connecting block is arranged at one end of the supporting rod, a second connecting block is arranged at the other end of the supporting rod, a first guide rail sliding block is further arranged on the supporting rod, a fixed block is arranged on the first guide rail sliding block, a second guide rail sliding block is fixed on the fixed block, and a convex block is arranged on the second guide rail sliding block;
the testing assembly comprises a supporting frame, a connecting sleeve is arranged on the supporting frame, the connecting sleeve is of a cavity structure, rolling bearings are arranged at two ends of the connecting sleeve, inner rings of the rolling bearings are fixed on a rotating shaft, a testing mold is arranged at one end of the rotating shaft, a plurality of grooves which are distributed circumferentially are arranged on the testing mold, moving blocks are arranged on the grooves, and the moving blocks are used for fixing the surface of the inner ring of the bearing to be tested.
Further, in a preferred embodiment of the present invention, the convex block is linearly moved by the second rail slider to finely adjust the position of the convex block.
Further, in a preferred embodiment of the present invention, the convex block moves linearly under the action of the first rail slider to coarsely adjust the position of the convex block.
Further, in a preferred embodiment of the present invention, the convex block is further provided with a movable connecting rod, and the movable connecting rod is provided with a camera.
Further, in a preferred embodiment of the present invention, the other end of the rotating shaft is connected to a first gear, the first gear is meshed with a second gear, and the second gear is connected to an output end of the driving motor.
Further, in a preferred embodiment of the present invention, the first connecting block is fixed on the frame, and the second connecting block is fixed on a side portion of the supporting frame.
Further, in a preferred embodiment of the present invention, the moving block is further connected to a spring, and the spring is disposed in the groove.
Further, in a preferred embodiment of the present invention, the moving blocks are each provided with a pressure sensor, and the pressure sensors are configured to collect pressure values received by the inner ring surface of the bearing to be tested within a preset time, and mark a position of the inner ring surface on which the pressure values act.
A second aspect of the present invention provides a test method for inspecting a bearing applied to the test apparatus for inspecting a bearing set forth in any one of claims, including the steps of:
a. adjusting the camera position of the camera to obtain the optimal camera position, and acquiring a plurality of bearing images to be tested in the camera position within a preset time;
b. comparing the multiple bearing images to obtain a first deviation distance;
c. judging whether the first deviation distance is larger than a preset first deviation distance or not;
d. if the bearing is larger than the preset value, the bearing is an unqualified product.
Further, in a preferred embodiment of the present invention, the method further comprises the following steps:
e. acquiring the surface pressure action position of the inner ring of the bearing to be tested in the preset time, and obtaining an actual deviation distance according to the surface pressure action position to obtain a second deviation distance;
f. when the second deviation distance is larger than a preset second deviation distance, recording a current environment temperature value;
g. and adjusting the current environment temperature value, recording a second deviation distance under the temperature value, repeating the step f until the second deviation distance is not more than a preset deviation distance, and recording the environment temperature value.
The invention solves the defects in the background technology, and has the following beneficial effects: the invention realizes the test of the bearings with different inner ring diameters by adjusting the position of the movable block, can simulate the relative displacement of the bearing between the bearing inner ring and the shaft in various temperature scenes by adjusting the position of the movable block, and has guiding significance for the bearing in the actual working scene.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.
Fig. 1 shows a perspective view of a test device for testing a bearing;
FIG. 2 shows a schematic view of a part of a test apparatus for testing a bearing;
FIG. 3 shows a partial structural schematic of a calibration assembly;
FIG. 4 shows a schematic view of a portion of the structure of a test assembly;
FIG. 5 shows a partial structural schematic of a test assembly;
FIG. 6 shows a schematic cross-sectional structure of a test assembly;
in the figure:
1. the device comprises a rack, 2, a correction component, 3, a test component, 201, a support rod, 202, a first connecting block, 203, a second connecting block, 204, a first guide rail sliding block, 205, a fixed block, 206, a second guide rail sliding block, 207, a convex block, 208, a movable connecting rod, 209, a camera, 301, a support frame, 302, a connecting sleeve, 303, a rolling bearing, 304, a rotating shaft, 305, a test mould, 306, a moving block, 307, a first gear, 308, a second gear, 309, a driving motor and 310 springs.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description, wherein the drawings are simplified schematic drawings and only the basic structure of the present invention is illustrated schematically, so that only the structure related to the present invention is shown, and it is to be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.
Fig. 1 shows a perspective view of a test device for testing a bearing;
FIG. 2 shows a schematic view of a part of a test apparatus for testing a bearing;
the invention provides a testing device for checking a bearing, which comprises a frame 1, a correcting component 2 and a testing component 3,
the correcting assembly 2 is arranged on the side part of the rack 1, the correcting assembly 2 comprises a supporting rod 201, one end of the supporting rod 201 is provided with a first connecting block 202, the other end of the supporting rod 201 is provided with a second connecting block 203, the supporting rod 201 is also provided with a first guide rail sliding block 204, the first guide rail sliding block 204 is provided with a fixed block 205, the fixed block 205 is fixed with a second guide rail sliding block 206, and the second guide rail sliding block 206 is provided with a convex block 207;
further, in a preferred embodiment of the present invention, the convex block 207 is linearly moved by the second rail slider 206 to finely adjust the position of the convex block 207.
Further, in a preferred embodiment of the present invention, the convex block 207 moves linearly by the first rail slider 204 to roughly adjust the position of the convex block 207.
Further, in a preferred embodiment of the present invention, the convex block 207 is further provided with a movable connecting rod 208, and the movable connecting rod 208 is provided with a plurality of cameras 209.
It should be noted that, in the process of testing the bearing, in the process of operating the device, the whole testing device inevitably has a shaking condition, which is a condition that the image acquisition of the bearing to be tested has a certain low accuracy. Therefore, according to the invention, the accuracy of the collected bearing image to be tested is improved by arranging a plurality of cameras 209 to perform compensation processing on the image collected at the same time, wherein the cameras 209 are distributed on the movable connecting rod 208 in a certain circumferential angle.
It should be noted that before the image of the bearing to be measured is acquired, the position of the camera 209 in the moving direction of the first guide rail slider 204 can be roughly adjusted by adjusting the position of the first guide rail slider 204, so that when the image of the bearing to be measured is shot, the picture of the bearing to be measured is kept at a better shooting position as much as possible.
The testing component 3 comprises a supporting frame 301, a connecting sleeve 302 is arranged on the supporting frame 301, the connecting sleeve 302 is of a cavity structure, rolling bearings 303 are arranged at two ends of the connecting sleeve 302, inner rings of the rolling bearings 303 are fixed on a rotating shaft 304, a testing mold 305 is arranged at one end of the rotating shaft 304, a plurality of grooves which are distributed circumferentially are arranged on the testing mold 305, moving blocks 306 are arranged on the grooves, and the moving blocks 306 are used for fixing the surfaces of the inner rings of the bearings to be tested.
Further, in a preferred embodiment of the present invention, the moving block 306 is further connected to a spring 310, and the spring 310 is disposed in the groove.
Further, in a preferred embodiment of the present invention, the other end of the rotating shaft 304 is connected to a first gear 307, the first gear 307 is meshed with a second gear 308, and the second gear 308 is connected to an output end of a driving motor 309.
It should be noted that, as shown in fig. 3, the bearing to be tested may be placed at the position of the moving block 306, and by using the expansion capability of the spring 310, the moving block 306 moves a certain distance under the action of the spring 310, so that the moving block 306 contacts the surface of the inner ring of the bearing to be tested, and further simulates the fit relationship between the shaft and the bearing, where the fit relationship includes clearance fit, interference fit, and transition fit, so that the bearing to be tested with various diameters can be tested, and the practical performance is higher. On the other hand, given a certain rotation speed of the driving motor 309, the driving motor 309 drives the first gear 309 and the second gear 310, so that the first gear 309 drives the rotation shaft to rotate, thereby driving the convex block 207 to rotate.
The change in the molecular motion state of the polymer material is called relaxation from the viewpoint of kinetics. When the temperature is increased, on one hand, the thermal motion capability of each motion unit can be improved, and on the other hand, due to thermal expansion, the intermolecular distance is increased, namely, the free volume in the high polymer is increased, so that the motion space of each motion unit is increased. Is beneficial to molecular motion, shortens the relaxation time and accelerates the relaxation process. The thermodynamic properties, viscoelastic properties and other physical properties of the polymer change dramatically with relaxation. The friction coefficient of the material, which is the most common mechanical index, is also affected by the temperature rise. Generally, the coefficient of friction of a material surface changes somewhat with increasing ambient temperature, but the magnitude of the change varies from material to material. The invention can simulate the change process of temperature to the friction coefficient, thereby obtaining the change condition when the shaft is matched with the bearing, determining the temperature environment suitable for the bearing, leading a user to better select the use scheme of the bearing, and providing a solid foundation for the normal use of equipment.
It should be noted that, a pressure sensor is arranged on the moving block 306, when the moving block 306 contacts the inner ring of the bearing to be measured, the stress condition, the stress position and the like of the current inner ring of the bearing can be displayed on the display screen, and when the inner ring of the bearing to be measured does high-speed rotation motion, the deviation condition of the stress position can be observed on the display screen, wherein the deviation condition is the movement amount of the stress position of the inner ring of the bearing to be measured and the moving block 306, and when the movement amount does not exceed the preset movement amount, it is indicated that the qualified standard of the bearing is met under the condition of the matching relationship. On the other hand, because the material is easily subjected to the phenomena of thermal expansion and cold contraction, along with the increase of the temperature of the balls in the bearing in the high-speed rotation process, the sealing performance in the bearing is easily influenced, the lubricating performance of the bearing is poor, at the moment, the leakage condition of the lubricating oil under the temperature can be observed in an image or video frame collected by a camera, the relative displacement generated by the bearing inner ring and the shaft under different torques and rotating speeds of the driving motor 309 is simulated, the relative displacement, the leakage condition of the lubricating oil of the bearing sealing cover, the rotating speed parameters and the like are displayed in a display screen, and the data are provided for a user as a judgment basis.
It should be noted that, under different temperatures, due to the phenomenon of expansion with heat and contraction with cold of the material, the matching acting force between the bearing and the moving block 306 is gradually increased, and the pressure value transmitted by the pressure sensor is gradually increased along with the increase of the temperature of the material, which can further simulate the change situation of the acting force between the shaft and the bearing under different temperatures, so as to find out the working environment, such as the optimal working temperature, the optimal rotation speed, etc., which the bearing conforms to according to the change situation, thereby predicting the working environment suitable for the bearing according to such working environment, reducing the phenomenon of multiple replacement in a special working temperature environment, and maximizing the use value of the bearing.
It should be noted that, in the process of high-speed rotation of the bearing, the balls are also in frequent contact with the inner ring of the bearing, and the energy is converted into kinetic energy of the balls on one hand, and on the other hand, the balls are in frequent contact with the inner ring of the bearing, and a part of the kinetic energy is converted into internal energy of the inner ring of the bearing; at this time, since the temperature rises, the bearing inner ring and the moving block 306 expand by a certain amount of material, and the indication of the pressure sensor increases, but at this time, the relative displacement of the bearing inner ring and the moving block 306 decreases, and the change of the temperature to the fit relationship between the bearing and the shaft can be revealed. On the other hand, a certain observation time and the rotating speed of the driving motor 309 can be set, and the temperature rise condition of the bearing under different rotating speeds can be observed, so that a proper temperature reduction opportunity is selected according to the temperature rise condition, the occurrence probability of the bearing early scrapping event caused by overhigh temperature in the actual long-time working environment is reduced, and the service life of the bearing is further prolonged.
It should be noted that, the fit relationship between the shaft and the bearing changes due to the increase of the temperature, and in some fit relationships requiring high requirements, for example, the increase of the temperature causes the clearance fit relationship to be converted into an interference fit, which is not favorable for some mechanical devices requiring high requirements; the expansion coefficients of the bearing material and the shaft material can be obtained through a big data network, so that the change condition of the temperature rise and the matching relation is predicted, a worker or a cooling system cools the bearing and the shaft at a proper time, the matching relation is kept unchanged, and the service life of the bearing is prolonged.
Further, in a preferred embodiment of the present invention, the first connecting block 202 is fixed on the frame 1, and the second connecting block 202 is fixed on a side of the supporting frame 301.
Further, in a preferred embodiment of the present invention, the moving blocks 306 are each provided with a pressure sensor, and the pressure sensors are configured to collect pressure values received by the inner ring surface of the bearing to be tested within a preset time, and mark the position of the inner ring surface on which the pressure values are applied.
It should be noted that, since the inner rings of the same type of bearing have substantially the same diameter, the tolerance range of the shaft is within a specified range when the same fitting relationship is selected. This device can set up the display screen in frame position department, and the display screen can present the pressure value variation of pressure sensor, and in the use of this device, pressure sensor initial recorded movable block 306 with wait to detect the position that the bearing contacted, at the high-speed rotatory in-process of bearing, can follow the display screen in the direct observation bearing pressure skew condition, this skew condition is the skew condition of the axle under this high-speed pivoted state promptly. In this way, the offset condition of the shaft and the bearing inner ring under a certain rotating speed can be simulated.
A second aspect of the present invention provides a test method for inspecting a bearing applied to the test apparatus for inspecting a bearing set forth in any one of claims, including the steps of:
a. adjusting the camera position of the camera to obtain the optimal camera position, and acquiring a plurality of bearing images to be tested in the camera position within a preset time;
b. comparing the multiple bearing images to obtain a first deviation distance;
c. judging whether the first deviation distance is larger than a preset first deviation distance or not;
d. if the bearing is larger than the preset value, the bearing is an unqualified product.
It should be noted that, in the experiment of simulating the bearing shaking condition, the image of the rotating bearing is collected in a specified time, the experimenter can mark the bearing, and by observing whether the tracking mark is always a circle with a fixed diameter, if the circle is not within the qualified range diameter, a deviation distance is generated, the larger the deviation distance is, the larger the shaking amplitude of the bearing is, and when the deviation distance exceeds the qualified deviation distance, the bearing is an unqualified product.
Further, in a preferred embodiment of the present invention, the method further comprises the following steps:
e. acquiring the surface pressure action position of the inner ring of the bearing to be tested in the preset time, and obtaining an actual deviation distance according to the surface pressure action position to obtain a second deviation distance;
f. when the second deviation distance is larger than a preset second deviation distance, recording a current environment temperature value;
g. and adjusting the current environment temperature value, recording a second deviation distance under the temperature value, repeating the step f until the second deviation distance is not more than a preset deviation distance, and recording the environment temperature value.
It should be noted that, in the use process of the device, the pressure sensor initially records the position where the moving block 306 contacts the bearing to be detected, and in the high-speed rotation process of the bearing, the pressure offset position of the bearing can be directly observed from the display screen, and the connection line of the two positions is offset displacement (namely, the second deviation distance), which is the relative offset displacement of the shaft in the high-speed rotation state. A certain rotation speed is set for the driving motor 309, and during the rotation, the relative displacement between the moving block 306 and the bearing and the pressure change are recorded under each temperature. Keeping the temperature value of the working environment of the bearing constant, and when the second deviation distance is greater than the set deviation displacement (namely, presetting the second deviation distance), indicating that the temperature is lower than the normal working temperature of the bearing; and changing the temperature value of the working environment until the second deviation distance is not greater than the preset deviation distance, and simulating the normal working temperature range of the bearing in the actual working environment according to the mode, thereby having the significance of actual bearing prediction guidance.
Among them, the change in the molecular motion state of a polymer material is called relaxation from the viewpoint of kinetics. When the temperature is continuously increased, on the one hand, the thermal motion capability of each motion unit can be improved, and on the other hand, due to thermal expansion, the distance between molecules is increased, namely the free volume in the high polymer is increased, so that the motion space of each motion unit is increased. This, while favoring molecular motion, shortens the relaxation time and speeds up the relaxation process. The thermodynamic properties, viscoelastic properties and other physical properties of the polymer change dramatically with relaxation. The friction coefficient of the material, which is the most common mechanical index, is also affected by the temperature rise. Generally, the coefficient of friction of a material surface changes somewhat with increasing ambient temperature, but the magnitude of the change varies from material to material. The invention can simulate the change process of temperature to the friction coefficient, thereby obtaining the change condition when the shaft is matched with the bearing, determining the temperature environment suitable for the bearing, leading a user to better select the use scheme of the bearing, and providing a solid foundation for the normal use of equipment.
In addition, the invention can also obtain the manufacturing material of the bearing from the big data network, because the inconsistent value of the material, the material expansion coefficient under the same temperature is inconsistent, the time that the bearing with the same shaft diameter is heated to the same temperature under a certain rotating speed is also inconsistent, thus utilize the mode to obtain the matching relation change situation of the bearing with different materials but the same inner diameter size when the bearing is heated to the same temperature, select a better bearing selection scheme for the user, provide a plurality of selection schemes, the user can select a better scheme according to the local working environment.
In conclusion, the invention realizes the test of the bearings with different inner ring diameters by adjusting the position of the movable block, and can simulate the relative displacement of the bearing between the inner ring and the shaft in various temperature scenes by adjusting the position of the movable block, thereby having guiding significance for the bearing in practical working scenes.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and the technology must be determined in accordance with the scope of the claims.
Claims (5)
1. A test method for inspecting a bearing, comprising the steps of:
a. adjusting the camera position of the camera to obtain the optimal camera position, and acquiring a plurality of bearing images to be tested in the camera position within a preset time;
b. comparing the multiple bearing images to obtain a first deviation distance;
c. judging whether the first deviation distance is larger than a preset first deviation distance or not;
d. if the bearing is larger than the preset value, the bearing is an unqualified product;
further comprising the steps of:
e. acquiring the surface pressure action position of the inner ring of the bearing to be tested in the preset time, and obtaining an actual deviation distance according to the surface pressure action position to obtain a second deviation distance;
f. when the second deviation distance is larger than a preset second deviation distance, recording a current environment temperature value;
g. adjusting the current environment temperature value, recording a second deviation distance under the temperature value, repeating the step f until the second deviation distance is not greater than the preset deviation distance, and recording the environment temperature value;
the testing device applied to the testing method for inspecting the bearing comprises a machine frame, a correcting component and a testing component,
the correcting assembly is arranged on the side portion of the rack and comprises a supporting rod, a first connecting block is arranged at one end of the supporting rod, a second connecting block is arranged at the other end of the supporting rod, a first guide rail sliding block is further arranged on the supporting rod, a fixed block is arranged on the first guide rail sliding block, a second guide rail sliding block is fixed on the fixed block, and a convex block is arranged on the second guide rail sliding block;
the testing assembly comprises a supporting frame, a connecting sleeve is arranged on the supporting frame, the connecting sleeve is of a cavity structure, rolling bearings are arranged at two ends of the connecting sleeve, inner rings of the rolling bearings are fixed on a rotating shaft, a testing mold is arranged at one end of the rotating shaft, a plurality of grooves distributed circumferentially are arranged on the testing mold, moving blocks are arranged on the grooves, and the moving blocks are used for fixing the surface of the inner ring of the bearing to be tested;
the moving block is also connected with a spring, and the spring is arranged in the groove;
pressure sensors are arranged on the moving blocks and used for collecting pressure values on the surface of the inner ring of the bearing to be tested within preset time and marking the position of the surface of the inner ring acted by the pressure values;
the convex block is also provided with a movable connecting rod, and the movable connecting rod is provided with a camera.
2. The test method for inspecting a bearing of claim 1, wherein the convex block is linearly moved by the second rail slider to finely adjust a position of the convex block.
3. The test method for inspecting a bearing of claim 1, wherein the convex block is linearly moved by the first rail slider to roughly adjust the position of the convex block.
4. The test method for inspecting a bearing according to claim 1, wherein the other end of the rotating shaft is connected to a first gear, the first gear is engaged with a second gear, and the second gear is connected to an output end of a driving motor.
5. The test method for inspecting a bearing of claim 1, wherein the first connecting block is fixed to the frame, and the second connecting block is fixed to a side of the supporting frame.
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