Cylindrical roller bearing dynamic balance test bench and test method

Abstract

The invention discloses a cylindrical roller bearing dynamic balance test bench and a test method, and relates to the technical field of bearing dynamic balance test, the cylindrical roller bearing dynamic balance test bench comprises a test bench, a connection positioning assembly, a long shaft system, a vibration test assembly and a radial test assembly, a long shaft system is installed at the end, away from the transmission shaft, of the connection positioning assembly, and a vibration testing assembly and a radial testing assembly are arranged between the installation support and the second vertical plate. The long shaft system and the connection positioning assembly are matched with rotation of the motor to carry out dynamic balance testing, vibration signals and vibration amplitude of the cylindrical roller bearing are amplified through the long shaft system, and signal collection and data analysis are carried out on torsional vibration, axial vibration and radial vibration of the cylindrical roller bearing in the rotation process.

Description

Technical Field

[0001] This invention relates to the field of bearing dynamic balancing testing technology, specifically to a dynamic balancing test bench and testing method for cylindrical roller bearings. Background Technology

[0002] The internal structure of cylindrical roller bearings uses rollers arranged in parallel, with spacers or separators between them to prevent roller tilting or friction between the rollers, effectively preventing an increase in rotational torque. During the design phase, cylindrical roller bearings require static and dynamic balancing tests to assess their design performance.

[0003] Existing technical solutions for bearing dynamic balancing tests mainly involve simultaneously performing correction and balancing on two correction surfaces of the rotor. The remaining imbalance after correction is within the permissible range to ensure that the rotor is within the specified range of permissible imbalance during dynamic operation. However, existing technical solutions mainly perform rotational correction on the bearing and lack simulated dynamic balancing tests of the bearing during actual operation. Summary of the Invention

[0004] The purpose of this invention is to provide a dynamic balancing test bench and test method for cylindrical roller bearings. Dynamic balancing tests are performed by using a long shaft system and connecting positioning components in conjunction with the rotation of a motor. The long shaft system amplifies the vibration signals and vibration amplitudes of the cylindrical roller bearings, and the torsional vibration, axial vibration, and radial vibration of the cylindrical roller bearings during rotation are collected and analyzed, thereby solving the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A dynamic balancing test bench for cylindrical roller bearings includes a test bench, a connecting and positioning assembly, a long shaft system, a vibration test assembly, and a radial test assembly. A first vertical plate and a second vertical plate are respectively mounted at both ends of the test bench. A mounting bracket is mounted on the side of the test bench near the first vertical plate, and the connecting and positioning assembly is mounted on the mounting bracket. The inner and outer rings of the cylindrical roller bearing are mounted between the connecting and positioning assembly and the mounting bracket. A motor is fixedly mounted on the first vertical plate, and a drive shaft is mounted on the output end of the motor. The drive shaft is connected to one end of the connecting and positioning assembly. A long shaft system is mounted on the end of the connecting and positioning assembly away from the drive shaft. The end of the long shaft system near the second vertical plate is rotatably engaged with the end face of the second vertical plate. The axes of the drive shaft, the long shaft system, and the connecting and positioning assembly coincide. Vibration test assemblies are respectively arranged between the mounting bracket and the second vertical plate. The test assembly includes a radial testing component and a long shaft system that runs through both the vibration testing component and the radial testing component. The vibration testing component is fixedly mounted on the test platform via a first support block. The vibration testing component is used to collect the rotational signal generated by the rotation of the long shaft system and send the signal to the control module. The control module is fixedly mounted on the test platform. The radial testing component is fixedly mounted on the test platform via a second support block. The radial testing component rotates in conjunction with the long shaft system and collects the pressure signal between the long shaft system and the radial testing component, sending the signal to the control module. A second pressure sensor is embedded in the end of the long shaft system near the second vertical plate. The second pressure sensor is used to collect the pressure signal between the long shaft system and the second vertical plate and send the signal to the control module. An oil supply component is installed on the side of the test platform near the second vertical plate, and the oil supply component is connected to the radial testing component.

[0007] Furthermore, the connecting positioning assembly includes a first flange, a second flange, a second frustum, and a nut. A first mounting disc is fixedly mounted on one side of the first flange, and a first frustum is fixedly mounted on the first mounting disc. A second mounting disc is fixedly mounted on the side of the second flange closest to the first flange, and a second frustum is fixedly mounted on the second mounting disc. A threaded rod is vertically mounted on the first frustum. A through hole is provided between the second frustum and the second flange, and a threaded rod is provided through the through hole. A nut is threadedly mounted on the end of the threaded rod away from the first flange. A bearing inner ring is provided between the first mounting disc and the second mounting disc. The first flange is bolted to the long shaft system, and the second flange is bolted to the drive shaft. The axes of the first frustum and the second frustum coincide.

[0008] Furthermore, the mounting bracket is provided with a through hole, in which a bearing outer ring slides and fits. The mounting bracket is provided with retaining rings on both sides, and the retaining rings are fixedly mounted on the mounting bracket by screws.

[0009] Furthermore, the vibration testing assembly includes a first housing, color sensors, and color rings. The first housing is fixedly mounted on a first support block. A long shaft system is installed through the first housing, and the axis of the first housing coincides with the axis of the long shaft system. Several sets of color rings are arranged on the long shaft system, and a color block is arranged on each color ring. A black partition is set between adjacent color blocks on the color ring. The color blocks on adjacent color rings are different colors, and they are arranged in red, green, and blue alternating from the direction near the mounting bracket to the direction near the second upright plate. Several sets of color sensors are installed at the top inside the first housing. The color sensors are used to collect the number of color blocks sampled per unit time and the color of the color blocks.

[0010] Furthermore, the radial testing assembly includes a cylindrical sleeve, a second housing, a first pressure sensor, and a one-way valve. The second housing is fixedly mounted on the second support block, and the axis of the second housing coincides with the axis of the long axis system. The cylindrical sleeve is fixedly mounted on the portion of the long axis system located inside the second housing. The cylindrical sleeve is rotatably fitted with the second housing. Several sets of first pressure sensors are embedded in the inner side of the second housing, and the distance between adjacent first pressure sensors is equal. The first pressure sensors are used to collect pressure signals from various collection points of the cylindrical sleeve and the second housing and send the signals to the control module. Annular oil grooves are symmetrically arranged on both sides inside the second housing, and an oil inlet is provided at the bottom of the second housing. A one-way valve is installed at the inlet of the oil inlet, and the one-way valve is connected to the oil supply assembly. The annular oil grooves are connected to the oil inlet.

[0011] Furthermore, the oil supply assembly includes an oil tank and an oil pump, which are fixedly mounted on the test bench. The input end of the oil pump is connected to the oil tank, which contains lubricating oil. The output end of the oil pump is connected to a one-way valve on the radial test assembly through an oil delivery pipe.

[0012] Furthermore, the control module includes a microcontroller unit, a signal acquisition module, a storage module, and a data transmission module. The microcontroller unit is used to send control signals to the motor, oil pump, and various electrical components on the test bench. The signal acquisition module is used to receive signals sent by the second pressure sensor, color sensor, and first pressure sensor and store them in the storage module. After the dynamic balance test is completed, the data set in the storage module is sent to the terminal console for data processing and analysis through the data transmission module.

[0013] A testing method for a dynamic balancing test bench for cylindrical roller bearings includes the following specific steps:

[0014] To install a cylindrical roller bearing, the inner ring of the bearing is fixed by connecting the positioning assembly, and the outer ring of the bearing is fixed by the mounting bracket. The drive shaft, the positioning assembly, and the long shaft system are then connected, thus completing the installation steps of the cylindrical roller bearing before the dynamic balance test.

[0015] The test signal data is collected by acquiring the pressure signal between the long shaft system and the second vertical plate through the second pressure sensor to acquire the axial vibration signal in the dynamic balance test of the cylindrical roller bearing, the rotation signal of the long shaft system is acquired through the vibration test component to acquire the torsional vibration signal in the dynamic balance test of the cylindrical roller bearing, and the pressure signal distribution between the long shaft system and the radial test component is acquired through the radial test component to acquire the radial vibration signal in the dynamic balance test of the cylindrical roller bearing.

[0016] Data analysis: The control module sends the signal data collected by the second pressure sensor, vibration test component and radial test component to the terminal console. The terminal console analyzes and processes the dynamic balance performance of the cylindrical roller bearing through data processing.

[0017] Remove the cylindrical roller bearing, disconnect the connection between the drive shaft, the connecting positioning assembly, and the long shaft system, and remove the cylindrical roller bearing from the connecting positioning assembly and the mounting bracket. This completes the dynamic balance test for a single model of cylindrical roller bearing.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention provides a dynamic balancing test bench and testing method for cylindrical roller bearings. The dynamic balancing test is performed by using a long shaft system and connecting positioning components in conjunction with the rotation of a motor. The long shaft system amplifies the vibration signal and vibration amplitude of the cylindrical roller bearing, and the torsional vibration, axial vibration and radial vibration of the cylindrical roller bearing during rotation are collected and analyzed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection and positioning component structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation of the mounting bracket of the present invention;

[0023] Figure 4 This is a schematic diagram of the vibration testing assembly structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the radial testing component structure of the present invention.

[0025] In the diagram: 1. Test bench; 11. First upright plate; 12. Mounting bracket; 13. Second upright plate; 14. Motor; 15. Drive shaft; 16. First support block; 17. Second support block; 18. Oil tank; 19. Oil pump; 2. Connecting and positioning assembly; 21. First flange; 22. Second flange; 23. First mounting disc; 24. First frustum; 25. Second mounting disc; 26. Second frustum; 27. Threaded rod; 28. Nut; 3. Long shaft system; 4. Vibration testing assembly; 41. First housing; 42. Color sensor; 43. Color ring; 5. Radial testing assembly; 51. Cylindrical sleeve; 52. Second housing; 53. First pressure sensor; 54. Annular oil groove; 55. Oil inlet; 56. Check valve; 6. Second pressure sensor; 7. Control module; 8. Inner ring of bearing; 9. Outer ring of bearing. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1 to 5As shown, a cylindrical roller bearing dynamic balancing test bench includes a test bench 1, a connecting and positioning assembly 2, a long shaft system 3, a vibration test assembly 4, and a radial test assembly 5. A first upright plate 11 and a second upright plate 13 are respectively mounted at both ends of the test bench 1. A mounting bracket 12 is mounted on the side of the test bench 1 closest to the first upright plate 11. The connecting and positioning assembly 2 is mounted on the mounting bracket 12. The inner ring 8 and outer ring 9 of the cylindrical roller bearing are mounted between the connecting and positioning assembly 2 and the mounting bracket 12. A motor 14 is fixedly mounted on the first upright plate 11. A drive shaft 15 is mounted on the output end of the motor 14 and is connected to one end of the connecting and positioning assembly 2. A long shaft system 3 is mounted on the end of the positioning component 2 away from the drive shaft 15. The end of the long shaft system 3 near the second vertical plate 13 is rotatably engaged with the end face of the second vertical plate 13. The axes of the drive shaft 15, the long shaft system 3, and the connecting positioning component 2 are coincident, allowing the drive shaft 15, the long shaft system 3, and the connecting positioning component 2 to rotate on the same axis, reducing external interference to the rotation of the cylindrical roller bearing. A vibration test component 4 and a radial test component 5 are respectively arranged between the mounting bracket 12 and the second vertical plate 13. The long shaft system 3 is inserted through the vibration test component 4 and the radial test component 5. The vibration test component 4 is fixedly mounted on the test table 1 by the first support block 16. Component 4 is used to collect the rotation signal generated by the rotation of the long shaft system 3 and send the signal to the control module 7. By analyzing the rotation signal collected by the vibration testing component 4, the torsional vibration of the cylindrical roller bearing during rotation can be analyzed. The control module 7 is fixedly installed on the test bench 1. The radial testing component 5 is fixedly installed on the test bench 1 by the second support block 17. The radial testing component 5 rotates with the long shaft system 3 and collects the pressure signal between the long shaft system 3 and the radial testing component 5 and sends the signal to the control module 7. By analyzing the change in the pressure signal between the long shaft system 3 and the radial testing component 5, the radial vibration of the cylindrical roller bearing during rotation can be analyzed. The long shaft system 3 is embedded at one end near the second vertical plate 13. A second pressure sensor 6 is provided. The second vertical plate 13 and the long shaft system 3 need to be pre-tightened during installation. The axial vibration can be analyzed in both forward and reverse directions to obtain the axial vibration amplitude of the bearing under dynamic balance test. The second pressure sensor 6 is used to collect the pressure signal between the long shaft system 3 and the second vertical plate 13 and send the signal to the control module 7. The axial vibration of the cylindrical roller bearing during rotation can be analyzed through the signal feedback of the second pressure sensor 6. An oil supply assembly is installed on the side of the test bench 1 near the second vertical plate 13. The oil supply assembly is connected to the radial test assembly 5, which can reduce the friction during the rotational engagement between the radial test assembly 5 and the long shaft system 3 and reduce the impact of friction on the test process.

[0028] The connecting positioning assembly 2 includes a first flange 21, a second flange 22, a second frustum 26, and a nut 28. A first mounting disc 23 is fixedly mounted on one side of the first flange 21, and a first frustum 24 is fixedly mounted on the first mounting disc 23. A second mounting disc 25 is fixedly mounted on the side of the second flange 22 near the first flange 21, and a second frustum 26 is fixedly mounted on the second mounting disc 25. A threaded rod 27 is vertically mounted on the first frustum 24. A through hole is formed between the second frustum 26 and the second flange 22, and the threaded rod 27 passes through the through hole. The threaded rod 27 is located away from the first flange 21. A nut 28 is threadedly mounted on one end of flange 21. A bearing inner ring 8 is positioned between the first mounting disc 23 and the second mounting disc 25. The bearing inner ring 8 is positioned and guided by the conical surfaces of the first frustum 24 and the second frustum 26. The nut 28 is locked by the threaded rotation of the threaded rod 27. The bearing inner ring 8 on the cylindrical roller bearing can be fixed between the first flange 21 and the second flange 22. The first flange 21 is bolted to the long shaft system 3, and the second flange 22 is bolted to the drive shaft 15. The axes of the first frustum 24 and the second frustum 26 coincide, which can achieve the fixed locking of the bearing inner ring 8.

[0029] The mounting bracket 12 is provided with a through hole, and the bearing outer ring 9 is slidably fitted in the through hole. The mounting bracket 12 is provided with fixing rings on both sides, and the fixing rings are fixedly installed on the mounting bracket 12 by screws, thereby realizing the limiting and fixing of the bearing outer ring 9 on the cylindrical roller bearing.

[0030] The vibration testing assembly 4 includes a first housing 41, color sensors 42, and color rings 43. The first housing 41 is fixedly mounted on the first support block 16. A long shaft system 3 is installed through the first housing 41, and the axis of the first housing 41 coincides with the axis of the long shaft system 3. Several sets of color rings 43 are arranged on the long shaft system 3. Each color ring 43 has a color block. Adjacent color blocks on the color ring 43 are separated by black partitions. The color blocks on adjacent color rings 43 are different colors and are arranged in red, green, and blue alternating from the direction near the mounting bracket 12 to the direction near the second upright plate 13. Several sets of color sensors 42 are installed at the top of the first housing 41. The color sensors 42 are used to collect the number of color blocks sampled per unit time and the color of the color blocks. Based on the number of color blocks per unit time, the time can be differentiated to obtain the rotational speed and the fluctuation amplitude of the rotational speed of the long shaft system 3 per unit time. By the frequency and number of color changes of the color blocks per unit time, the axial dynamic stability and vibration amplitude of the bearing at the current rotational speed can be calculated.

[0031] The radial testing assembly 5 includes a cylindrical sleeve 51, a second housing 52, a first pressure sensor 53, and a one-way valve 56. The second housing 52 is fixedly mounted on the second support block 17, and the axis of the second housing 52 coincides with the axis of the long shaft system 3. The cylindrical sleeve 51 is fixedly mounted on the portion of the long shaft system 3 located inside the second housing 52. The cylindrical sleeve 51 is rotatably fitted with the second housing 52. Several sets of first pressure sensors 53 are embedded inside the second housing 52, and the distance between adjacent first pressure sensors 53 is equal. The first pressure sensors 53 are used to collect pressure signals from various collection points of the cylindrical sleeve 51 and the second housing 52 and transmit the signals. The data is sent to the control module 7. By comparing the pressure values ​​collected by the first pressure sensor 53 at each acquisition point under static conditions with the pressure values ​​collected by the first pressure sensor 53 at each acquisition point under dynamic rotation, the vibration and amplitude of the cylindrical roller bearing in the radial direction under dynamic balance test can be obtained. Annular oil grooves 54 are symmetrically arranged on both sides inside the second housing 52. An oil inlet hole 55 is provided at the bottom of the second housing 52. A one-way valve 56 is installed at the inlet of the oil inlet hole 55. The one-way valve 56 is connected to the oil supply assembly. The annular oil grooves 54 are connected to the oil inlet hole 55, which enables the oil supply assembly to lubricate the rotation between the cylindrical sleeve 51 and the second housing 52.

[0032] The oil supply assembly includes an oil tank 18 and an oil pump 19, which are fixedly installed on the test bench 1. The input end of the oil pump 19 is connected to the oil tank 18, which contains lubricating oil. The output end of the oil pump 19 is connected to the one-way valve 56 on the radial test assembly 5 through an oil supply pipe, thereby achieving lubrication of the long shaft system 3 during its rotation within the radial test assembly 5.

[0033] The control module 7 includes a microcontroller unit, a signal acquisition module, a storage module, and a data transmission module. The microcontroller unit is used to send control signals to the motor 14, the oil pump 19, and various electrical components on the test bench. The signal acquisition module is used to receive signals sent by the second pressure sensor 6, the color sensor 42, and the first pressure sensor 53 and store them in the storage module. After the dynamic balance test is completed, the data set in the storage module is sent to the terminal console for data processing and analysis through the data transmission module.

[0034] A testing method for a dynamic balancing test bench for cylindrical roller bearings includes the following specific steps:

[0035] To install the cylindrical roller bearing, the inner ring 8 of the bearing is fixed by connecting the positioning assembly 2, and the outer ring 9 of the bearing is fixed by the mounting bracket 12. The drive shaft 15, the positioning assembly 2 and the long shaft system 3 are then connected, thus completing the installation steps of the cylindrical roller bearing before the dynamic balance test.

[0036] The test signal data is collected by acquiring the pressure signal between the long shaft system 3 and the second vertical plate 13 through the second pressure sensor 6 to realize the axial vibration signal in the dynamic balance test of the cylindrical roller bearing, the rotation signal of the long shaft system 3 is acquired through the vibration test component 4 to realize the torsional vibration signal in the dynamic balance test of the cylindrical roller bearing, and the pressure signal distribution between the long shaft system 3 and the radial test component 5 is acquired through the radial test component 5 to realize the radial vibration signal in the dynamic balance test of the cylindrical roller bearing.

[0037] Data analysis: The control module 7 sends the signal data collected by the second pressure sensor 6, vibration test component 4 and radial test component 5 to the terminal console. The terminal console analyzes and processes the dynamic balance performance of the cylindrical roller bearing through data processing.

[0038] Remove the cylindrical roller bearing, disconnect the connection between the drive shaft 15, the connecting positioning assembly 2 and the long shaft system 3, and remove the cylindrical roller bearing from the connecting positioning assembly 2 and the mounting bracket 12. This completes the dynamic balance test of a single model of cylindrical roller bearing.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic balancing test bench for cylindrical roller bearings, comprising a test bench (1), a connecting and positioning assembly (2), a long shaft system (3), a vibration test assembly (4), and a radial test assembly (5), characterized in that: The test bench (1) has a first upright plate (11) and a second upright plate (13) installed at both ends. A mounting bracket (12) is installed on the side of the test bench (1) closest to the first upright plate (11). A connecting positioning assembly (2) is installed on the mounting bracket (12). A cylindrical roller bearing inner ring (8) and outer ring (9) are installed between the connecting positioning assembly (2) and the mounting bracket (12). A motor (14) is fixedly installed on the first upright plate (11). A drive shaft is installed at the output end of the motor (14). 15), the drive shaft (15) is connected to one end of the connecting positioning assembly (2), and a long shaft system (3) is installed on the end of the connecting positioning assembly (2) away from the drive shaft (15). The end of the long shaft system (3) near the second vertical plate (13) is rotatably engaged with the end face of the second vertical plate (13). The axes of the drive shaft (15), the long shaft system (3) and the connecting positioning assembly (2) coincide. A vibration test assembly (4) and a radial test assembly (5) are respectively provided between the mounting bracket (12) and the second vertical plate (13). (3) A through-hole is installed in the vibration test assembly (4) and the radial test assembly (5). The vibration test assembly (4) is fixedly installed on the test bench (1) by the first support block (16). The vibration test assembly (4) is used to collect the rotation signal generated by the rotation of the long shaft system (3) and send the signal to the control module (7). The control module (7) is fixedly installed on the test bench (1). The radial test assembly (5) is fixedly installed on the test bench (1) by the second support block (17). The radial test assembly (5) and the long shaft system ( 3) Rotate and collect the pressure signal between the long shaft system (3) and the radial test component (5) and send the signal to the control module (7). The long shaft system (3) is embedded with a second pressure sensor (6) at one end near the second vertical plate (13). The second pressure sensor (6) is used to collect the pressure signal between the long shaft system (3) and the second vertical plate (13) and send the signal to the control module (7). An oil supply component is installed on the side of the test platform (1) near the second vertical plate (13). The oil supply component is connected to the radial test component (5).

2. The cylindrical roller bearing dynamic balancing test bench according to claim 1, characterized in that: The connection positioning assembly (2) includes a first flange (21), a second flange (22), a second frustum (26), and a nut (28). A first mounting disc (23) is fixedly installed on one side of the first flange (21), and a first frustum (24) is fixedly installed on the first mounting disc (23). A second mounting disc (25) is fixedly installed on the side of the second flange (22) near the first flange (21), and a second frustum (26) is fixedly installed on the second mounting disc (25). A threaded rod (27) is vertically installed on the first frustum (24). A through hole is provided between the second frustum (26) and the second flange (22), and a threaded rod (27) is provided through the through hole. A nut (28) is threadedly installed at the end of the threaded rod (27) away from the first flange (21). A bearing inner ring (8) is provided between the first mounting disc (23) and the second mounting disc (25). The first flange (21) is bolted to the long shaft system (3), and the second flange (22) is bolted to the drive shaft (15). The axes of the first frustum (24) and the second frustum (26) coincide.

3. The cylindrical roller bearing dynamic balancing test bench according to claim 2, characterized in that: The mounting bracket (12) is provided with a through hole, and a bearing outer ring (9) is slidably fitted inside the through hole. Fixing rings are provided on both sides of the mounting bracket (12), and the fixing rings are fixedly installed on the mounting bracket (12) by screws.

4. The cylindrical roller bearing dynamic balancing test bench according to claim 3, characterized in that: The vibration testing assembly (4) includes a first housing (41), color sensors (42), and color rings (43). The first housing (41) is fixedly mounted on the first support block (16). A long shaft system (3) is provided through the first housing (41). The axis of the first housing (41) coincides with the axis of the long shaft system (3). Several sets of color rings (43) are provided on the long shaft system (3). A color block is provided on a single color ring (43). A black partition is provided between adjacent color blocks on the color ring (43). The color blocks on adjacent color rings (43) are different colors. They are arranged in red, green, and blue in alternating directions from near the mounting bracket (12) to near the second upright plate (13). Several sets of color sensors (42) are installed on the top of the first housing (41). The color sensors (42) are used to collect the number of color blocks sampled per unit time and the color of the color blocks.

5. The cylindrical roller bearing dynamic balancing test bench according to claim 4, characterized in that: The radial testing assembly (5) includes a cylindrical sleeve (51), a second housing (52), a first pressure sensor (53), and a one-way valve (56). The second housing (52) is fixedly mounted on the second support block (17). The axis of the second housing (52) coincides with the axis of the long shaft system (3). The cylindrical sleeve (51) is fixedly mounted on the portion of the long shaft system (3) located inside the second housing (52). The cylindrical sleeve (51) is rotatably fitted with the second housing (52). Several sets of first pressure sensors (53) are embedded inside the second housing (52). 3) The distance between adjacent first pressure sensors (53) is equal. The first pressure sensor (53) is used to collect pressure signals from each collection point of the cylindrical sleeve (51) and the second housing (52) and send the signals to the control module (7). The second housing (52) has symmetrically arranged annular oil grooves (54) on both sides. The bottom of the second housing (52) has an oil inlet hole (55). A one-way valve (56) is installed at the inlet of the oil inlet hole (55). The one-way valve (56) is connected to the oil supply component. The annular oil groove (54) is connected to the oil inlet hole (55).

6. The cylindrical roller bearing dynamic balancing test bench according to claim 5, characterized in that: The oil supply assembly includes an oil tank (18) and an oil pump (19). The oil tank (18) and the oil pump (19) are fixedly installed on the test bench (1). The input end of the oil pump (19) is connected to the oil tank (18). The oil tank (18) contains lubricating oil. The output end of the oil pump (19) is connected to the one-way valve (56) on the radial test assembly (5) through an oil delivery pipe.

7. The cylindrical roller bearing dynamic balancing test bench according to claim 6, characterized in that: The control module (7) includes a microcontroller unit, a signal acquisition module, a storage module, and a data transmission module. The microcontroller unit is used to send control signals to the motor (14), the oil pump (19), and various electrical components on the test bench. The signal acquisition module is used to receive signals sent by the second pressure sensor (6), the color sensor (42), and the first pressure sensor (53) and store them in the storage module. After the dynamic balance test is completed, the data set in the storage module is sent to the terminal console for data processing and analysis through the data transmission module.

8. A test method for a dynamic balancing test bench for cylindrical roller bearings, characterized in that: The specific steps include the following: Install the cylindrical roller bearing, fix the inner ring (8) of the cylindrical roller bearing by connecting the positioning assembly (2), fix the outer ring (9) of the cylindrical roller bearing by the mounting bracket (12), connect the drive shaft (15), connect the positioning assembly (2) and the long shaft system (3), and the installation steps of the cylindrical roller bearing before dynamic balance test are completed. The test signal data is collected. The pressure signal between the long shaft system (3) and the second vertical plate (13) is collected by the second pressure sensor (6) to realize the axial vibration signal in the dynamic balance test of the cylindrical roller bearing. The rotation signal of the long shaft system (3) is collected by the vibration test component (4) to realize the torsional vibration signal in the dynamic balance test of the cylindrical roller bearing. The pressure signal distribution between the long shaft system (3) and the radial test component (5) is collected by the radial test component (5) to realize the radial vibration signal in the dynamic balance test of the cylindrical roller bearing. Data analysis: The control module (7) sends the signal data collected by the second pressure sensor (6), vibration test assembly (4) and radial test assembly (5) to the terminal console. The terminal console analyzes and processes the dynamic balance performance of the cylindrical roller bearing through data processing. Remove the cylindrical roller bearing, disconnect the connection between the drive shaft (15), the connecting positioning assembly (2) and the long shaft system (3), and remove the cylindrical roller bearing from the connecting positioning assembly (2) and the mounting bracket (12) to complete the dynamic balance test of a single model of cylindrical roller bearing.

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