Tapered roller bearing assembling and adjusting experiment system

Abstract

The utility model relates to a tapered roller bearing installation and adjustment experiment system, which comprises a system host and a tapered roller bearing installation and adjustment experiment unit, the tapered roller bearing installation and adjustment experiment unit comprises at least two sets of tapered roller experiment bearings, two sets of cylindrical roller accompanying bearings, an axial force loading device, an axial force detection device and a radial loading device, and the axial force detection device is installed on the axial force loading device; the axial force loading device comprises an axial loading head and a loading sleeve; and the axial loading head is connected to the outer end face of the first loading sleeve, extends out of the outer end part of the installation and adjustment experiment unit and is connected with an external end cover. The system takes a tapered roller bearing as a representative object, comprises a hardware unit and a software unit, and detects force and displacement parameters through a high-precision sensor to realize high-precision measurement and precise regulation, and a software system can also form a load-displacement curve of the bearing, and compares the load-displacement curve with a simulation result to verify the accuracy of load-deformation adjustment.

Description

Technical Field

[0001] This utility model relates to a tapered roller bearing assembly and adjustment experimental system, which realizes high-precision measurement and precise control of bearing force and displacement, verifies the principle of assembly and adjustment optimization method, and belongs to the field of bearing assembly technology. Background Technology

[0002] The installation and commissioning of rolling bearings are mostly done based on experience, making it impossible to accurately obtain installation and commissioning parameters such as force and displacement; it is also impossible to achieve high-precision measurement and precise control of force and displacement; when facing the performance of rolling bearing installation and commissioning, it is impossible to verify the principle of installation and commissioning optimization methods, making it difficult to expect to obtain good service performance of the bearing rotor system. Summary of the Invention

[0003] In view of the above-mentioned technical problems, this utility model provides a tapered roller bearing assembly and adjustment experimental system to achieve high-precision measurement and precise control of bearing force and displacement, and to verify the principle of the assembly and adjustment optimization method.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tapered roller bearing assembly and adjustment test system, comprising: a system host, a tapered roller bearing assembly and adjustment test unit, an electrical control cabinet, and a spindle motor driver cabinet; the tapered roller bearing assembly and adjustment test unit is disposed within the system host, and a spindle is disposed at the axial center of the tapered roller bearing assembly and adjustment test unit, one end of which is the drive end of the tapered roller bearing assembly and adjustment test unit; a spindle servo motor is disposed outside the drive end of the bearing assembly and adjustment test unit, and the servo motor is installed in the spindle motor driver cabinet outside the system host; the electrical control cabinet is disposed near the spindle motor driver cabinet; the system host is connected to the electrical control cabinet via a cable, and the spindle motor driver cabinet is connected to the electrical control cabinet via a cable;

[0005] Furthermore, the system host is also equipped with a hydraulic station, which is connected to the electrical control cabinet via a cable;

[0006] In the above technical solution, the function of the hydraulic station is to provide power for the axial and radial hydraulic pump loading of the tapered roller bearing assembly and adjustment test unit. The external hydraulic station is designed to avoid noise, vibration and other disturbances to the equipment during hydraulic startup.

[0007] The function of the spindle motor driver cabinet is to control the start, stop, rotation direction, and acceleration / deceleration of the spindle servo motor. Since the servo motor has a large power, it is externally mounted to avoid interference from the high current to the electrical control cabinet signal.

[0008] The electrical control cabinet has the following functions: a) controlling the start and stop of the hydraulic station, and adjusting the hydraulic loading force and loading direction; b) controlling the servo driver in the spindle motor driver cabinet to control the start, stop, rotation direction and acceleration / deceleration of the servo motor; c) controlling various signals in the host of the acquisition system.

[0009] Furthermore, the tapered roller bearing assembly and adjustment test unit includes: at least two sets of tapered roller test bearings, two sets of cylindrical roller test bearings, an axial force loading device, an axial force detection device, a radial loading device, shaft system supporting components, and a casting unit; each end of the main shaft is connected to a tapered roller test bearing, and the main shaft and the two tapered roller test bearings are interference-fitted; one end of the assembly and adjustment test unit in the direction of one of the tapered roller test bearings is connected to the axial force loading device; the two sets of cylindrical roller test bearings are located in the middle position of the main shaft; both sets of tapered roller test bearings are connected to the casting unit of the assembly and adjustment test unit through the loading sleeve of the axial force loading device and the shaft system supporting components; the two sets of cylindrical roller test bearings are located between the radial loading device and the outer diameter of the main shaft and are limited by the spacer assembly; the axial force detection device is installed on the axial force loading device;

[0010] Furthermore, the shaft system assembly includes: a bushing and a spacer assembly; two sets of tapered roller test bearings have their inner rings interference-fitted onto the main shaft, and their outer ring outer diameter and outer end face are connected to the bushing via a loading sleeve; the casting unit includes: a casting cover and a casting seat; the bushing is embedded between the casting cover and the casting seat;

[0011] Furthermore, the casting cover, bushing, and loading sleeve are all fixed together with screws, as are the casting base, bushing, and loading sleeve.

[0012] Furthermore, the radial loading device includes a radial loading sleeve, which is connected to the radial loading head by screws; two sets of cylindrical roller test bearings are separated by an inner ring and an outer ring, the inner ring being connected to the main shaft, the outer ring being installed outside the inner ring, and the outer ring being connected to the inner diameter of the radial loading sleeve; the two sets of cylindrical roller test bearings on the main shaft and their external radial loading sleeve divide the two sets of tapered roller test bearings into left and right regions in the assembly and adjustment experimental unit; the two ends of the radial loading sleeve limit the two sets of cylindrical roller test bearings through their respective spacer assemblies; wherein, the loading sleeve located in the left region is the first loading sleeve, and the loading sleeve located in the right region is the second loading sleeve; the spacer assembly closer to the first loading sleeve is the first spacer assembly;

[0013] Furthermore, the first spacer assembly includes: an inner spacer, an outer spacer, and an outer spacer; the inner spacer is connected to the main shaft, the outer diameter of the inner spacer is provided with the outer spacer, and the outer diameter of the outer spacer is connected to the outer spacer; the two ends of the outer spacer are in contact with the end face of the radial loading sleeve and the end face of the first loading sleeve, respectively; the two ends of the inner spacer are in contact with the main shaft shoulder at the inner diameter position of the cylindrical roller test bearing and the end face of the inner ring of the tapered roller test bearing in the left part area, respectively.

[0014] Furthermore, the structure of the second spacer assembly and the connection method of the second spacer assembly in the right part of the assembly and adjustment experimental unit are exactly the same as those of the first spacer.

[0015] Furthermore, the axial force loading device includes: an axial loading head and a loading sleeve; the axial loading head is connected to the outer end face of the first loading sleeve, and the axial loading head extends out of the outer end of the assembly and adjustment experimental unit and is connected to the external end cap.

[0016] Furthermore, the end cap is connected to the bushing by bolts, and the axial loading head is connected to an external loading source, which is used to apply force to the spindle.

[0017] In the above structure, single-row tapered roller bearings are used as test bearings at both ends of the assembly and adjustment test unit, and two sets of cylindrical roller bearings are used as auxiliary test bearings in the middle. The axial load is directly applied to the outer ring of the test bearing, and the radial load is applied to the inner ring of the test bearing through the auxiliary test bearing. The bearing and shaft are interference fit, and the lubrication method is circulating oil or grease lubrication. The service performance parameters such as load, displacement, temperature, vibration, and friction torque of the experiment can be monitored in real time.

[0018] The tapered roller test bearings mentioned above are model HH926749 / HH926710; the cylindrical roller test bearings are model NU328.

[0019] Furthermore, an axial force detection device installed on the axial force loading device is used to detect the magnitude of the applied axial force;

[0020] The axial force detection device includes a force sensor, which is bolted to a flange close to and connected to the axial loading head; the force sensor can detect the load magnitude in real time.

[0021] Furthermore, the force sensor model selected is the BK-4C spoke-type pressure sensor, which has an accuracy better than ±0.5%FS.

[0022] Furthermore, the test bearing with the axial force loading device is the loading end test bearing; since the tapered roller bearing is a separable structure, the end face of the raceway is easy to tilt. An axial displacement detection device is installed on one side of the loading end test bearing to measure the amount of displacement of the inner ring of the bearing relative to the outer ring caused by the axial force, that is, the amount of deformation of the bearing.

[0023] The axial displacement detection device includes two sets of displacement measurement units. Each set of displacement measurement units contains three axial displacement sensors, and each set of displacement measurement units forms three measurement points with the experimental bearing at the loading end. The three measurement points of one set of displacement measurement units are located at the inner ring end face of the experimental bearing, that is, three axial displacement sensors are set on the inner ring end face and the three axial displacement sensors are distributed at 120° on the inner ring end face of the experimental bearing, which can obtain three displacement values ​​and an average value. The three measurement points of the other set of displacement measurement units are located at the outer ring end face of the experimental bearing, that is, three axial displacement sensors are set on the outer ring end face and the three axial displacement sensors are distributed at 120° on the outer ring end face of the experimental bearing, which can also obtain three displacement values ​​and an average value.

[0024] Furthermore, the six displacement sensors mentioned above are fixedly mounted on the same end cover with screws on the end face of the experimental bearing at the loading end, and the connecting wires on each displacement sensor are connected to the electrical control cabinet; the relative displacement of the inner and outer rings, i.e., the deformation of the bearing, can be obtained by subtracting the average value of the relative displacement of three points evenly distributed on the circumference of the inner and outer rings.

[0025] Furthermore, the displacement sensor can be either a contact displacement sensor or a non-contact displacement sensor.

[0026] The contact displacement sensor used is the Keyence GT2-P12K high-precision displacement sensor, with a stroke of 12mm and a resolution of 0.1μm. During the use of this displacement sensor, static measurement should be performed as much as possible, and the spindle should not be rotated to avoid damaging the displacement sensor probe.

[0027] The non-contact displacement sensor is an eddy current displacement sensor, which can measure the displacement of the inner and outer ring end faces of the bearing after the spindle rotates, so as to obtain the relative displacement of the inner and outer rings.

[0028] The force-displacement relationship measured by the axial force loading device and axial displacement detection device with the above structure can be used to further analyze the static and dynamic stiffness of the bearing.

[0029] The method of the tapered roller bearing assembly and adjustment experimental system with the above-described structure in this scheme uses a software system to generate the load-displacement curve of the bearing based on the hardware structure, and compares it with the simulation results to verify the accuracy of the assembly and adjustment load (force)-deformation (displacement); the specific measurement method is as follows:

[0030] First, a dynamic break-in test was conducted on the bearing, followed by a shutdown. Second, high-precision contact displacement sensors were installed on the outer and inner ring end faces of the bearing at the loading end for static measurements. The sensor positions were adjusted to ensure all initial values ​​were essentially consistent and in good operating condition. Then, the load was gradually applied using an axial force loading device. Because there is a clearance between the inner and outer rings of the tapered roller bearing, an initial preload is needed to eliminate this clearance and achieve zero contact. Through repeated testing, it was found that when the initial axial force of the system is 4 kN, the displacement sensor readings relative to this position can be zeroed, meaning the bearing deformation is zero. Static tests under axial load can be performed, and through repeatable experiments, the load-deformation relationship can be established. The initial sensor value was adjusted to approximately 3000 µm.

[0031] By using the software system to access the "sensor screen," the displacement measurement values ​​at various locations can be observed. This can be used for sensor debugging. When the axial load can eliminate the bearing clearance, clicking the "relative position" button resets all displacement sensor values ​​to 0, and then the average value of the displacement change is calculated. The average displacement of three points on the inner and outer rings of the bearing at the loading end, as well as their relative displacement, i.e., the deformation of the bearing, are given. At the same time, the relationship curve between the axial force and the deformation can be displayed.

[0032] Furthermore, the force load detection and control accuracy during the above assembly and adjustment process is better than ±0.5%FS, and the displacement measurement and control resolution is better than 0.2μm. This system can achieve precise control of assembly and adjustment parameters such as force and high-precision measurement of displacement, and can obtain the curve of the relative displacement of the inner and outer rings of the experimental bearing with the assembly and adjustment load, thus verifying the bearing load-deformation relationship.

[0033] The beneficial effects of the technical solution of this utility model are:

[0034] The hardware system employs high-precision sensors to detect force and displacement parameters, enabling high-precision measurement and precise control; it obtains the relative displacement of the inner and outer rings of the bearing, i.e., the bearing deformation; the software system also generates the bearing load-displacement curve, thereby verifying the accuracy of the load (force)-deformation (displacement) during assembly and adjustment; it can verify the principle of on-site assembly and adjustment optimization methods, and is expected to achieve good service performance of the bearing rotor system. Attached Figure Description

[0035] Figure 1 This is a structural diagram of the tapered roller bearing assembly and adjustment experimental system of this utility model.

[0036] Figure 2 for Figure 1 The rear structural diagram.

[0037] Figure 3This is a schematic diagram illustrating the connection principle of the tapered roller bearing assembly and adjustment experimental system of this utility model.

[0038] Figure 4 for Figure 1 The internal structure diagram of the system host.

[0039] Figure 5 This is a cross-sectional view of the internal structure of the tapered roller bearing assembly and adjustment test unit.

[0040] Figure 6 This is a screenshot of the displacement sensor in the software system of this solution.

[0041] Figure 7 This is a load-displacement curve (axial force) of the bearing generated by the software system.

[0042] In the diagram, 1. System host, 2. Tapered roller bearing assembly and adjustment test unit, 3. Electrical control cabinet, 4. Spindle motor driver cabinet, 5. Hydraulic station, 6. Spindle, 7. Tapered roller test bearing, 8. Cylindrical roller test bearing, 9. Bushing, 10. Casting cover, 11. Casting seat, 12. Radial loading sleeve, 13. Inner ring, 14. Outer ring, 15. First loading sleeve, 16. Second loading sleeve, 17. Inner spacer, 18. Outer spacer, 19. Outer spacer ring, 20. Axial loading head, 21. End cover, 22. Force sensor, 23. Axial displacement sensor, 24. Displacement fixing plate, a. Cable. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0044] like Figure 1-5 The tapered roller bearing assembly and adjustment test system shown includes: a system host 1, a tapered roller bearing assembly and adjustment test unit 2, an electrical control cabinet 3, and a spindle motor driver cabinet 4; the tapered roller bearing assembly and adjustment test unit 2 is disposed inside the system host 1, and a spindle 6 is disposed at the axial center of the tapered roller bearing assembly and adjustment test unit 2, one end of the spindle 6 being the drive end of the tapered roller bearing assembly and adjustment test unit 2; a spindle servo motor is disposed outside the drive end of the bearing assembly and adjustment test unit 2, and the servo motor is installed in the spindle motor driver cabinet 4 outside the system host 1; the electrical control cabinet 3 is disposed near the spindle motor driver cabinet 4; the system host 1 is connected to the electrical control cabinet 3 via cable a, and the spindle motor driver cabinet 4 is connected to the electrical control cabinet 3 via cable a;

[0045] The system host 1 is also equipped with a hydraulic station 5, which is connected to the electrical control cabinet 3 via cable a.

[0046] The tapered roller bearing assembly and adjustment test unit 2 includes: at least two sets of tapered roller test bearings 7, two sets of cylindrical roller test bearings 8, an axial force loading device, an axial force detection device, a radial loading device, shaft system supporting components, and a casting unit; each end of the main shaft 6 is connected to a tapered roller test bearing 7, and the main shaft 6 and the two tapered roller test bearings 7 are interference-fitted; one end of the assembly and adjustment test unit 2 in the direction of one of the tapered roller test bearings is connected to the axial force loading device; the two sets of cylindrical roller test bearings 8 are located in the middle position of the main shaft 6; both sets of tapered roller test bearings 7 are connected to the casting unit of the assembly and adjustment test unit 2 through the loading sleeve of the axial force loading device and the shaft system supporting components; the two sets of cylindrical roller test bearings 8 are located between the radial loading device and the outer diameter of the main shaft 6 and are limited by the spacer assembly; the axial force detection device is installed on the axial force loading device;

[0047] The shaft system assembly includes: a bushing 9 and a spacer assembly; two sets of tapered roller test bearings 7 with their inner rings interference-fitted onto the main shaft 6, and their outer ring outer diameter and outer end face connected to the bushing 9 via a loading sleeve; the casting unit includes: a casting cover 10 and a casting seat 11; the bushing 9 is embedded between the casting cover 10 and the casting seat 11.

[0048] The casting cover 10, bushing 9, and loading sleeve, as well as the casting base 11, bushing 9, and loading sleeve, are all fixed together with screws;

[0049] The radial loading device includes a radial loading sleeve 12, which is connected to the radial loading head by screws. Two sets of cylindrical roller test bearings 8 are separated by an inner ring 13 and an outer ring 14. The inner ring 13 is connected to the main shaft 6, and the outer ring 14 is installed outside the inner ring 13. The outer ring 14 is connected to the inner diameter of the radial loading sleeve 12. The two sets of cylindrical roller test bearings 8 on the main shaft 6 and their external radial loading sleeve 12 divide the two sets of tapered roller test bearings 7 into left and right regions in the assembly and adjustment test unit 2. The two ends of the radial loading sleeve 12 limit the two sets of cylindrical roller test bearings 8 through their respective spacer assemblies. The loading sleeve located in the left region is the first loading sleeve 15, and the loading sleeve located in the right region is the second loading sleeve 16. The spacer assembly closer to the first loading sleeve 15 is the first spacer assembly.

[0050] The first spacer assembly includes: an inner spacer 17, an outer spacer 18, and an outer spacer 19; the inner spacer 17 is connected to the main shaft 6, the outer diameter of the inner spacer 17 is provided with the outer spacer 19, and the outer diameter of the outer spacer 19 is connected to the outer spacer 18; the two ends of the outer spacer 18 are in contact with the end face of the radial loading sleeve 12 and the end face of the first loading sleeve 15, respectively; the two ends of the inner spacer 17 are in contact with the main shaft shoulder at the inner diameter position of the cylindrical roller test bearing 8 and the end face of the inner ring of the tapered roller test bearing 7 in the left part area, respectively.

[0051] The structure of the second spacer assembly and the connection method of the second spacer assembly in the right part of the assembly and adjustment experimental unit 2 are exactly the same as those of the first spacer.

[0052] The axial force loading device includes: an axial loading head 20 and a loading sleeve; the axial loading head 20 is connected to the outer end face of the first loading sleeve 15, and the axial loading head 20 extends out of the outer end of the assembly and adjustment experimental unit 2 and is connected to the outer end cap 21.

[0053] The end cap 21 is connected to the bushing 9 by bolts, and the axial loading head 20 is connected to an external loading source. The axial loading head 20 is used to apply force to the spindle 6.

[0054] The end cover 21 of the assembly and adjustment test unit 2 in the direction of the axial force loading device is provided with a displacement fixing plate 24. In the above structure, each end of the assembly and adjustment test unit 2 uses a single row of tapered roller bearings as test bearings, and two sets of cylindrical roller bearings in the middle are used as auxiliary test bearings. The axial load is directly applied to the outer ring of the test bearing, and the radial load is applied to the inner ring of the test bearing through the auxiliary test bearing. The bearing and the main shaft 6 are interference fit, and the lubrication method is circulating oil lubrication. The service performance parameters such as load, displacement, temperature, vibration, and friction torque of the experiment can be monitored in real time.

[0055] The axial force detection device includes a force sensor 22, which is bolted to a flange close to and connected to the axial loading head 20; the force sensor 22 can detect the load magnitude in real time.

[0056] The force sensor model 22 is a BK-4C spoke-type pressure sensor, with an accuracy better than ±0.5%FS.

[0057] The test bearing with the axial force loading device is the loading end test bearing. Since the tapered roller bearing is a separable structure, the end face of the raceway is easy to tilt. An axial displacement detection device is installed on one side of the loading end test bearing to measure the amount of displacement of the inner ring of the bearing relative to the outer ring caused by the axial force, that is, the amount of deformation of the bearing.

[0058] The axial displacement detection device includes two sets of displacement measurement units. Each set of displacement measurement units contains three axial displacement sensors 23. Each set of displacement measurement units forms three measurement points with the experimental bearing at the loading end. The three measurement points of one set of displacement measurement units are located at the inner ring end face of the experimental bearing. That is, three axial displacement sensors 23 are set on the inner ring end face and the three axial displacement sensors 23 are distributed at 120° on the inner ring end face of the experimental bearing, which can obtain three displacement values ​​and an average value. The three measurement points of the other set of displacement measurement units are located at the outer ring end face of the experimental bearing. That is, three axial displacement sensors 23 are set on the outer ring end face and the three axial displacement sensors 23 are distributed at 120° on the outer ring end face of the experimental bearing, which can also obtain three displacement values ​​and an average value.

[0059] The above six axial displacement sensors 23 are fixedly mounted on the same end cover 21 with screws on the end face of the experimental bearing at the loading end. The connecting wires on each displacement sensor are connected to the electrical control cabinet. The relative displacement of the inner and outer rings, i.e. the deformation of the bearing, can be obtained by subtracting the average value of the relative displacement of three points evenly distributed on the circumference of the inner and outer rings.

[0060] In this embodiment, the axial displacement sensor 23 is a contact displacement sensor, which is a Keyence GT2-P12K high-precision displacement sensor with a stroke of 12mm and a resolution of 0.1μm.

[0061] As another embodiment of this solution, the axial displacement sensor 23 is a non-contact displacement sensor, which is an eddy current displacement sensor that can measure the displacement of the inner and outer ring end faces of the bearing after the spindle rotates, so as to obtain the relative displacement of the inner and outer rings.

[0062] The force-displacement relationship measured by the axial force loading device and axial displacement detection device with the above structure can be used to further analyze the static and dynamic stiffness of the bearing.

[0063] The method of the tapered roller bearing assembly and adjustment experimental system with the above-described structure in this scheme uses a software system to generate the load-displacement curve of the bearing based on the hardware structure, and compares it with the simulation results to verify the accuracy of the assembly and adjustment load (force)-deformation (displacement); the specific measurement method is as follows:

[0064] First, a dynamic break-in test was conducted on the bearing, followed by a shutdown. Second, high-precision contact displacement sensors 23 were installed on the outer and inner ring end faces of the bearing at the loading end for static measurement. The positions of the axial displacement sensors 23 were adjusted to ensure that the initial values ​​of all axial displacement sensors 23 were essentially consistent and in good operating condition (a green light was displayed on the axial displacement sensor 23). Then, the load was gradually applied using an axial force loading device. Because there is a clearance between the inner and outer rings of the tapered roller bearing, an initial preload is required to eliminate the bearing clearance and achieve a zero-contact state. Through repeated practice, it was found that when the initial axial force of the system is 4 kN, the measured value of the axial displacement sensor 23 can be zeroed relative to this position, meaning the bearing deformation is zero. Static tests under axial load can be performed, and through repeatable experiments, the load-deformation relationship can be established. The initial sensor value was adjusted to approximately 3000 µm.

[0065] like Figure 6 As shown, by accessing the "Sensor Screen" of the software system, the displacement measurement values ​​at various locations can be observed. This can be used for sensor debugging. When the axial load can eliminate bearing clearance, clicking the "Relative Position" button resets all axial displacement sensor values ​​23 to 0, and then the average value of the displacement change is calculated. The figure shows the average displacement of three points on the inner and outer rings of the bearing at the loading end, and the relative displacement between them, i.e., the deformation of the bearing. It also displays the relationship curve between the axial force and the deformation. Figure 7 As shown.

[0066] It should be noted that, Figure 7 The curve shown is the relationship between the axial force and the deformation. The load in this scheme refers to the axial preload, and the axial displacement is measured. The relationship between the two is verified by the simulation results. For radial force loading of tapered bearings, only radial force can be applied, and the influence of radial force on axial displacement under combined load is not significant. It is mainly used for service performance testing, so the relationship curve of the radial force is not shown separately.

[0067] The system software is implemented using LabVIEW programming language, including "sensor screen", which realizes the testing of deformation and the display of force-displacement relationship.

[0068] During the above assembly and adjustment process, the force load detection and control accuracy is better than ±0.5%FS, and the displacement measurement and control resolution is better than 0.2μm. This system can realize the precise control of assembly and adjustment parameters such as force and the high-precision measurement of displacement. It can also obtain the curve of the relative displacement of the inner and outer rings of the experimental bearing with the assembly and adjustment load, and verify the bearing load-deformation relationship.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0074] The above-listed embodiments are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A tapered roller bearing assembly and adjustment experimental system, characterized in that, include: The system comprises a main unit, a tapered roller bearing assembly and adjustment test unit, an electrical control cabinet, and a spindle motor driver cabinet. The tapered roller bearing assembly and adjustment test unit is located inside the main unit. A spindle is positioned at the axial center of the test unit, with one end serving as the drive end. A spindle servo motor is located outside the drive end of the test unit and is housed in the spindle motor driver cabinet outside the main unit. The electrical control cabinet is located near the spindle motor driver cabinet. The main unit is connected to the electrical control cabinet via cables, and the spindle motor driver cabinet is also connected to the electrical control cabinet via cables. A hydraulic station is also located outside the main unit and is connected to the electrical control cabinet via cables.

2. The tapered roller bearing assembly and adjustment test system according to claim 1, characterized in that: The tapered roller bearing assembly and adjustment test unit includes: at least two sets of tapered roller test bearings, two sets of cylindrical roller test bearings, an axial force loading device, an axial force detection device, a radial loading device, shaft system supporting components, and a casting unit; each end of the main shaft is connected to a tapered roller test bearing, and the main shaft and the two tapered roller test bearings are interference-fitted; one end of the assembly and adjustment test unit in the direction of one of the tapered roller test bearings is connected to the axial force loading device; the two sets of cylindrical roller test bearings are located in the middle position of the main shaft; both sets of tapered roller test bearings are connected to the casting unit of the assembly and adjustment test unit through the loading sleeve of the axial force loading device and the shaft system supporting components; the two sets of cylindrical roller test bearings are located between the radial loading device and the outer diameter of the main shaft and are limited by the spacer assembly; the axial force detection device is installed on the axial force loading device; The experimental bearing for which the axial force loading device is installed is the loading end experimental bearing, and the axial displacement detection device is installed on one side of the loading end experimental bearing.

3. The tapered roller bearing assembly and adjustment test system according to claim 2, characterized in that: The shaft system components include: a bushing and a spacer assembly; two sets of tapered roller test bearings with inner rings interference-fitted onto the main shaft, and the outer diameter and outer end face of the outer rings connected to the bushings via a loading sleeve; the casting unit includes: a casting cover and a casting seat; the bushing is embedded between the casting cover and the casting seat.

4. The tapered roller bearing assembly and adjustment test system according to claim 2, characterized in that: The radial loading device includes a radial loading sleeve, which is connected to the radial loading head by screws; two sets of cylindrical roller test bearings are separated by an inner ring and an outer ring, with the inner ring connected to the main shaft and the outer ring installed outside the inner ring, and the outer ring connected to the inner diameter of the radial loading sleeve; the two sets of cylindrical roller test bearings on the main shaft and their external radial loading sleeves divide the two sets of tapered roller test bearings into left and right regions in the assembly and adjustment experimental unit; the two ends of the radial loading sleeve limit the two sets of cylindrical roller test bearings through their respective spacer assemblies; wherein, the loading sleeve located in the left region is the first loading sleeve, and the loading sleeve located in the right region is the second loading sleeve; the spacer assembly closer to the first loading sleeve is the first spacer assembly.

5. The tapered roller bearing assembly and adjustment test system according to claim 4, characterized in that: The axial force loading device includes: an axial loading head and a loading sleeve; the axial loading head is connected to the outer end face of the first loading sleeve, and the axial loading head extends out of the outer end of the assembly and adjustment experimental unit and is connected to the external end cap.

6. The tapered roller bearing assembly and adjustment test system according to claim 2, characterized in that: An axial force detection device installed on an axial force loading device includes a force sensor, which is bolted to a flange close to and connected to the axial loading head; the force sensor can detect the load magnitude in real time.

7. The tapered roller bearing assembly and adjustment test system according to claim 6, characterized in that: The force sensor used is a BK-4C spoke-type pressure sensor, which has an accuracy better than ±0.5%FS.

8. The tapered roller bearing assembly and adjustment test system according to claim 2, characterized in that: The axial displacement detection device includes two sets of displacement measurement units. Each set of displacement measurement units contains three axial displacement sensors. Each set of displacement measurement units forms three measurement points with the experimental bearing at the loading end. The three measurement points of one set of displacement measurement units are located at the inner ring end face of the experimental bearing, that is, three axial displacement sensors are set on the inner ring end face and the three axial displacement sensors are distributed at 120° on the inner ring end face of the experimental bearing. The three measurement points of the other set of displacement measurement units are located at the outer ring end face of the experimental bearing, that is, three axial displacement sensors are set on the outer ring end face and the three axial displacement sensors are distributed at 120° on the outer ring end face of the experimental bearing.

9. The tapered roller bearing assembly and adjustment test system according to claim 8, characterized in that: Six displacement sensors are fixed to the same end cover by screws on the end face of the experimental bearing at the loading end. The connecting wires on each displacement sensor are connected to the electrical control cabinet. The displacement sensors are contact type displacement sensors, and the contact displacement sensors are Keyence GT2-P12K high-precision displacement sensors.

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