Tapered roller bearing assembling and adjusting experiment system and method

Abstract

The invention relates to a tapered roller bearing installation and adjustment experiment system and method. The system comprises a system host and tapered roller bearing installation and adjustment experiment units. 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] The invention relates to a tapered roller bearing assembly and adjustment experimental system and method, which realizes high-precision measurement and precise regulation of bearing force and displacement, and performs principle verification on an assembly and adjustment optimization method, and belongs to the technical field of bearing assembly. Background Art

[0002] The installation and commissioning of rolling bearings during their application are mostly done based on experience, and it is impossible to accurately obtain the adjustment parameters, such as force and displacement; it is impossible to achieve high-precision measurement and precise control of force and displacement; when faced with the adjustment performance of rolling bearings, it is impossible to verify the principle of the adjustment optimization method, and it is difficult to expect good service performance of the bearing rotor system. Summary of the invention

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

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a tapered roller bearing adjustment experiment system, comprising: a system host, a tapered roller bearing adjustment experiment unit, an electric control cabinet and a spindle motor driver cabinet; the tapered roller bearing adjustment experiment unit is arranged in the system host, a spindle is arranged at the axial center of the tapered roller bearing adjustment experiment unit, and one end of the spindle is the driving end of the tapered roller bearing adjustment experiment unit; a spindle servo motor is arranged outside the driving end of the bearing adjustment experiment unit, and the servo motor is installed in the spindle motor driver cabinet outside the system host; an electric control cabinet is arranged near the spindle motor driver cabinet; the system host is connected to the electric control cabinet through a cable, and the spindle motor driver cabinet is connected to the electric control cabinet through a cable; Furthermore, a hydraulic station is provided outside the mainframe of the system, and the hydraulic station is connected to the electric control cabinet via a cable; In the above technical solution, the hydraulic station functions as follows: providing power for the axial and radial hydraulic pump loading of the tapered roller bearing adjustment experimental unit. The hydraulic station is externally mounted to avoid interference to the equipment caused by noise and vibration during hydraulic startup; The spindle motor driver cabinet functions as follows: controlling the start and stop, rotation direction, acceleration and deceleration of the spindle servo motor. Since the servo motor has a large power, it is placed externally to avoid interference of large current on the electric control cabinet signal. The functions of the electric control cabinet are: a. controlling the start and stop of the hydraulic station, adjusting the hydraulic loading force and loading direction; b. controlling the servo driver in the spindle motor driver cabinet to control the start and stop, rotation direction and acceleration and deceleration of the servo motor; c. controlling various signals in the host of the acquisition system.

[0005] Furthermore, the tapered roller bearing adjustment test unit comprises: 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, a shaft system matching component and a casting unit; a tapered roller test bearing is connected to each of the two ends of the main shaft, and the main shaft and the two tapered roller test bearings are interference fit; one end of the 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 of the main shaft; the two sets of tapered roller test bearings are connected to the casting unit of the adjustment test unit through the loading sleeve of the axial force loading device and the shaft system matching component, and 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; Furthermore, the shaft system supporting components include: a sleeve and a spacer assembly; the inner rings of two sets of tapered roller test bearings are interference fit on the main shaft, and the outer diameter and outer end surface of the outer ring are connected to the sleeve through a loading sleeve; the casting unit includes: a casting cover and a casting seat; the sleeve is embedded between the casting cover and the casting seat; Furthermore, the casting cover, the shaft sleeve, and the loading sleeve, and the casting seat, the shaft sleeve, and the loading sleeve are all fixed together by screws; 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 is connected to the main shaft, the outer ring is installed outside the inner ring, and the outer ring is 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 areas in the installation and adjustment experimental unit; the two ends of the radial loading sleeve limit the two sets of cylindrical roller test bearings by their own spacer assemblies; wherein, the loading sleeve located in the left area is the first loading sleeve, and the loading sleeve located in the right area is the second loading sleeve; the spacer assembly close to the direction of the first loading sleeve is the first spacer assembly; Further, the first spacer assembly includes: an inner spacer sleeve, an outer spacer sleeve, and an outer spacer ring; the inner spacer sleeve is connected to the main shaft, the outer diameter of the inner spacer sleeve is provided with an outer spacer ring, and the outer diameter of the outer spacer ring is connected to the outer spacer sleeve; the two ends of the outer spacer sleeve are respectively in contact with the end face of the radial loading sleeve and the end face of the first loading sleeve; the two ends of the inner spacer sleeve are respectively in contact with the main shaft shoulder at the inner diameter position of the cylindrical roller test bearing and the inner ring end face of the tapered roller test bearing in the left part area; Furthermore, the structure of the second spacer ring assembly and the connection method of the second spacer ring assembly in the right part area of ​​the installation and adjustment experimental unit are exactly the same as those of the first spacer ring.

[0006] Furthermore, the axial force loading device comprises: an axial loading head and a loading sleeve; the axial loading head is connected to the outer end surface of the first loading sleeve, and the axial loading head extends out of the outer end of the adjustment experiment unit and is connected to the external end cover; Furthermore, the end cover is connected to the shaft sleeve by bolts, and the axial loading head is connected to an external loading source, and is used to apply a force to the main shaft through the axial loading head; In the above structure, single-row tapered roller bearings are used as experimental bearings at both ends of the installation and adjustment experimental unit, and two sets of cylindrical roller bearings are used as companion test bearings in the middle. The axial load is directly loaded on the outer ring of the experimental bearing, and the radial load is loaded on the inner ring of the experimental bearing through the companion test bearing; the bearing and the shaft are interference fit, and the lubrication method is circulating oil or grease lubrication, and the service performance parameters such as load, displacement, temperature, vibration, friction torque, etc. of the experiment can be monitored in real time. The model of the above-mentioned tapered roller test bearing is HH926749 / HH926710; the model of the cylindrical roller companion test bearing is NU328.

[0007] Further, an axial force detection device installed on the axial force loading device is used to detect the magnitude of the applied axial force; 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 size in real time; Furthermore, the force sensor model is a BK-4C spoke-type pressure sensor, whose accuracy is better than ±0.5%FS.

[0008] Furthermore, the experimental bearing on which the axial force loading device is installed is a loading end experimental bearing; since the tapered roller bearing is a separable structure, the end face of the ring is prone to tilt, an axial displacement detection device is installed on one side of the loading end experimental bearing to measure the displacement of the inner ring of the bearing relative to the outer ring caused by the axial force, that is, the deformation of the bearing; The axial displacement detection device includes two sets of displacement measurement units, each set of displacement measurement units includes three axial displacement sensors, and each set of displacement measurement units forms three measurement points with the loading end experimental bearing respectively; the three measurement points of one set of displacement measurement units are located at the end face of the inner ring of the experimental bearing, that is, three axial displacement sensors are arranged on the end face of the inner ring and the three axial displacement sensors are distributed at 120° on the end face of the inner ring of the experimental bearing, and three displacement values ​​and an average value can be obtained; the three measurement points of the other set of displacement measurement units are located at the end face of the outer ring of the experimental bearing, that is, three axial displacement sensors are arranged on the end face of the outer ring and the three axial displacement sensors are distributed at 120° on the end face of the outer ring of the experimental bearing, and three displacement values ​​and an average value can also be obtained; Furthermore, the six displacement sensors are located on the end face of the experimental bearing at the loading end and fixed on the same end cover with screws, and the connecting wires on each displacement sensor are connected to the electric control cabinet; the average value of the relative displacement of three points evenly distributed on the circumference of the inner and outer rings of the bearing is subtracted to obtain the relative displacement of the inner and outer rings, that is, the deformation of the bearing.

[0009] Furthermore, the displacement sensor adopts a contact displacement sensor and a non-contact displacement sensor; The contact displacement sensor adopts the Keyence GT2-P12K high-precision displacement sensor, which has a stroke of 12mm and a resolution of 0.1μm. The displacement sensor is used for static measurement as much as possible during use, and the spindle should not rotate to avoid damage to the displacement sensor probe; The non-contact displacement sensor adopts an eddy current displacement sensor, which can measure the end surface displacement of the inner and outer rings of the bearing after the main shaft rotates to obtain the relative displacement of the inner and outer rings.

[0010] The force-displacement relationship measured by the axial force loading device and the axial displacement detection device of the above structure can be used to further analyze the static and dynamic stiffness of the bearing.

[0011] The method of the tapered roller bearing adjustment test system of the above structure of this scheme is adopted. On the basis of the above hardware structure, the load-displacement curve of the bearing is formed by the software system, and compared with the simulation result to verify the accuracy of the adjustment load (force)-deformation (displacement); the specific measurement method is as follows: First, conduct a dynamic running-in test on the bearing, and then stop rotating; second, install high-precision contact displacement sensors on the outer and inner ring end faces of the experimental bearing at the loading end for static measurement, and adjust the sensor positions so that all sensor initial values ​​are basically consistent and in good operating condition; then control the load to be loaded gradually through the axial force loading device; since there is a gap between the inner and outer rings of the tapered roller bearing, an initial preload is required to eliminate the bearing gap so that the tapered roller bearing reaches a zero contact state. After repeated practice, when the initial axial force of this system is 4kN, the measured value of the displacement sensor can be reset to zero relative to this position, that is, the bearing deformation is zero; static experiments under axial load can be carried out, and the load-deformation relationship can be formed through repeatable experiments; the initial value of the above-mentioned adjustment sensor is about 3000µm; By using the software system to enter the "Sensor Screen" of the software system, the displacement measurement values ​​at various positions can be observed, which can be used for sensor debugging. When the axial load can eliminate the bearing clearance, click the "Relative Position" button to reset all displacement sensor values ​​to 0, and then calculate the average value of the displacement change; the average displacement of three points around the inner and outer rings of the bearing at the loading end and the relative displacement of the two, that is, the deformation of the bearing, are given. At the same time, the relationship curve between the loading axial force and the deformation can be displayed.

[0012] Furthermore, the force load detection and control accuracy during the above-mentioned adjustment process 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 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 changing with the adjustment load, and verify the bearing load-deformation relationship.

[0013] The beneficial effects of the technical solution of the present invention are: Through the hardware system, high-precision sensors are used to detect force and displacement parameters to achieve high-precision measurement and precise control; the relative displacement of the inner and outer rings of the bearing, that is, the deformation of the bearing, is obtained; the load-displacement curve of the bearing is also formed through the software system, and the accuracy of the adjustment load (force)-deformation (displacement) is verified; the principle of the on-site adjustment optimization method can be verified, and good service performance of the bearing rotor system is expected to be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the tapered roller bearing assembly and adjustment experimental system of the present invention.

[0015] Figure 2 for Figure 1 Rear structural diagram of .

[0016] Figure 3 This is a schematic diagram of the connection relationship of the tapered roller bearing assembly and adjustment experimental system of the present invention.

[0017] Figure 4 for Figure 1 The internal structure diagram of the system host.

[0018] Figure 5 This is a cross-sectional view of the internal structure of the tapered roller bearing assembly and adjustment experimental unit.

[0019] Figure 6 This is the displacement sensor screen in the software system of this solution.

[0020] Figure 7 The load-displacement curve (axial force) of the bearing generated by the software system.

[0021] In the figure, 1. system host, 2. tapered roller bearing assembly and adjustment experimental unit, 3. electric control cabinet, 4. spindle motor driver cabinet, 5. hydraulic station, 6. spindle, 7. tapered roller experimental 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, 20. axial loading head, 21. end cover, 22. force sensor, 23. axial displacement sensor, 24. displacement fixing plate, a. cable. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0023] like Figure 1-5 The tapered roller bearing adjustment experiment system shown comprises: a system host 1, a tapered roller bearing adjustment experiment unit 2, an electric control cabinet 3 and a spindle motor driver cabinet 4; the tapered roller bearing adjustment experiment unit 2 is arranged in the system host 1, and a spindle 6 is arranged at the axial center of the tapered roller bearing adjustment experiment unit 2, and one end of the spindle 6 is the driving end of the tapered roller bearing adjustment experiment unit 2; a spindle servo motor is arranged outside the driving end of the bearing adjustment experiment unit 2, and the servo motor is installed in the spindle motor driver cabinet 4 outside the system host 1; an electric control cabinet 3 is arranged near the spindle motor driver cabinet 4; the system host 1 is connected to the electric control cabinet 3 through cable a, and the spindle motor driver cabinet 4 is connected to the electric control cabinet 3 through cable a; The system host 1 is also provided with a hydraulic station 5 outside, and the hydraulic station 5 is connected to the electric control cabinet 3 through a cable a; The tapered roller bearing adjustment experimental unit 2 comprises: at least two sets of tapered roller experimental bearings 7, two sets of cylindrical roller test bearings 8, an axial force loading device, an axial force detection device, a radial loading device, a shaft system matching component and a casting unit; the two ends of the main shaft 6 are respectively connected to a tapered roller experimental bearing 7, and the main shaft 6 and the two tapered roller experimental bearings 7 are interference fit; one end of the adjustment experimental unit 2 in the direction of one tapered roller experimental bearing 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; the two sets of tapered roller experimental bearings 7 are connected to the casting unit of the adjustment experimental unit 2 through the loading sleeve of the axial force loading device and the shaft system matching component, and 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; The shaft system matching components include: a sleeve 9 and a spacer assembly; the inner rings of the two sets of tapered roller test bearings 7 are interference fit on the main shaft 6, and the outer diameter and outer end surface of the outer ring are connected to the sleeve 9 through a loading sleeve; the casting unit includes: a casting cover 10 and a casting seat 11; the sleeve 9 is embedded between the casting cover 10 and the casting seat 11; The casting cover 10, the shaft sleeve 9, and the loading sleeve, and the casting seat 11, the shaft sleeve 9, and the loading sleeve are all fixed together by screws; 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 in between, the inner ring 13 is connected to the main shaft 6, the outer ring 14 is installed outside the inner ring 13, and 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 sleeves 12 divide the two sets of tapered roller test bearings 7 into left and right areas in the installation and adjustment experimental unit 2; the two ends of the radial loading sleeve 12 limit the two sets of cylindrical roller test bearings 8 by their own spacer assemblies; wherein, the loading sleeve located in the left part area is the first loading sleeve 15, and the loading sleeve located in the right part area is the second loading sleeve 16; the spacer assembly close to the first loading sleeve 15 is the first spacer assembly; The first spacer assembly includes: an inner spacer sleeve 17, an outer spacer sleeve 18, and an outer spacer ring 19; the inner spacer sleeve 17 is connected to the main shaft 6, the outer spacer ring 19 is arranged on the outer diameter of the inner spacer sleeve 17, and the outer diameter of the outer spacer ring 19 is connected to the outer spacer sleeve 18; the two ends of the outer spacer sleeve 18 are respectively in contact with the end face of the radial loading sleeve 12 and the end face of the first loading sleeve 15; the two ends of the inner spacer sleeve 17 are respectively in contact with the main shaft shoulder at the inner diameter position of the cylindrical roller companion test bearing 8 and the inner ring end face of the tapered roller test bearing 7 in the left part area; The structure of the second spacer ring assembly and the connection method of the second spacer ring assembly in the right part area of ​​the installation and adjustment experimental unit 2 are exactly the same as those of the first spacer ring.

[0024] The axial force loading device comprises: an axial loading head 20 and a loading sleeve; the axial loading head 20 is connected to the outer end surface of the first loading sleeve 15, and the axial loading head 20 extends out of the outer end of the adjustment experiment unit 2 and is connected to the external end cover 21; The end cover 21 is connected to the shaft sleeve 9 by bolts, and the axial loading head 20 is connected to an external loading source, and is used to apply a force to the main shaft 6 through the axial loading head 20; A displacement fixing plate 24 is provided on the outside of the end cover 21 of the installation and adjustment experimental unit 2 in the direction of the axial force loading device; in the above structure, single-row tapered roller bearings are used as experimental bearings at both ends of the installation and adjustment experimental unit 2, and two sets of cylindrical roller bearings are used as companion bearings in the middle, and the axial load is directly loaded on the outer ring of the experimental bearing, and the radial load is loaded on the inner ring of the experimental bearing through the companion bearing; the bearing and the main shaft 6 are interference fit, and its lubrication method is circulating oil lubrication, and the service performance parameters such as load, displacement, temperature, vibration, friction torque, etc. of the experiment can be monitored in real time. 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 size in real time; The force sensor 22 model uses a BK-4C spoke-type pressure sensor, and its accuracy is better than ±0.5%FS.

[0025] The test bearing with the axial force loading device installed is the loading end test bearing; since the tapered roller bearing is a separable structure, the ring end face is prone to tilt, and an axial displacement detection device is installed on one side of the loading end test bearing to measure the displacement of the inner ring of the bearing relative to the outer ring caused by the axial force, that is, the deformation of the bearing; The axial displacement detection device includes two sets of displacement measurement units, each set of displacement measurement units includes three axial displacement sensors 23, and each set of displacement measurement units forms three measurement points with the loading end experimental bearing respectively; the three measurement points of one set of displacement measurement units are located at the end face of the inner ring of the experimental bearing, that is, three axial displacement sensors 23 are arranged on the end face of the inner ring of the experimental bearing and the three axial displacement sensors 23 are distributed at 120° on the end face of the inner ring of the experimental bearing, and three displacement values ​​and an average value can be obtained; the three measurement points of the other set of displacement measurement units are located at the end face of the outer ring of the experimental bearing, that is, three axial displacement sensors 23 are arranged on the end face of the outer ring of the experimental bearing and the three axial displacement sensors 23 are distributed at 120° on the end face of the outer ring of the experimental bearing, and three displacement values ​​and an average value can also be obtained; The above six axial displacement sensors 23 are located on the end face of the experimental bearing at the loading end and fixedly installed on the same end cover 21 by screws. The connecting wires on each displacement sensor are connected to the electric control cabinet. The relative displacement of the inner and outer rings, that is, 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 of the bearing.

[0026] In this embodiment, the axial displacement sensor 23 adopts a contact displacement sensor, and the contact displacement sensor adopts a Keyence GT2-P12K high-precision displacement sensor, whose stroke is 12mm and resolution is 0.1μm; As another embodiment of the present scheme, the axial displacement sensor 23 adopts a non-contact displacement sensor, and the non-contact displacement sensor adopts an eddy current displacement sensor, which can measure the end surface displacement of the inner and outer rings of the bearing after the main shaft rotates to obtain the relative displacement of the inner and outer rings.

[0027] The force-displacement relationship measured by the axial force loading device and the axial displacement detection device of the above structure can be used to further analyze the static and dynamic stiffness of the bearing.

[0028] The method of the tapered roller bearing adjustment test system of the above structure of this scheme is adopted. On the basis of the above hardware structure, the load-displacement curve of the bearing is formed by the software system, and compared with the simulation result to verify the accuracy of the adjustment load (force)-deformation (displacement); the specific measurement method is as follows: First, conduct a dynamic running-in test on the bearing, and then stop rotating; second, install high-precision contact displacement sensors 23 on the end faces of the outer and inner rings of the experimental bearing at the loading end for static measurement, and adjust the position of the axial displacement sensor 23 so that the initial values ​​of all axial displacement sensors 23 are basically consistent and in good operating condition (a green light is displayed on the axial displacement sensor 23); then control the load to be loaded gradually through the axial force loading device; since there is a gap between the inner and outer rings of the tapered roller bearing, an initial preload is required to eliminate the bearing gap so that the tapered roller bearing reaches a zero contact state. After repeated practice, when the initial axial force of this system is 4kN, the measured value of the axial displacement sensor 23 can be reset to zero relative to this position, that is, the bearing deformation is zero; static experiments under axial load can be carried out, and the load-deformation relationship can be formed through repeatable experiments; the initial value of the above-mentioned adjustment sensor is about 3000µm; like Figure 6As shown, the software system is used to operate the "sensor screen" of the software system, and the displacement measurement values ​​of each position are observed, which can be used for sensor debugging. When the axial load can eliminate the bearing clearance, click the "relative position" button to reset all the values ​​of the axial displacement sensors 23 to 0, and then calculate the average value of the displacement change; the figure shows the average displacement of three points around the inner and outer rings of the bearing at the loading end, and the relative displacement of the two, that is, the deformation of the bearing. At the same time, the relationship curve between the loading axial force and the deformation can be displayed, such as Figure 7 shown.

[0029] It should be noted that Figure 7 What is shown is the relationship curve between the loaded axial force and the deformation. The adjustment load in this scheme refers to the axial preload, and the axial displacement is measured. The relationship between the two is mutually verified with the simulation results. For the radial force loading of the tapered bearing, only the radial force cannot be added, and the influence of the radial force on the axial displacement under the combined load is not significant. It is mainly used for service performance testing, so the relationship curve of the loaded radial force is not separately reflected.

[0030] The software system of this system is implemented using Labview language programming, including the "sensor screen" to realize the testing of deformation and the display of force-displacement relationship.

[0031] During the above-mentioned 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 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 changing with the adjustment load, and verify the bearing load-deformation relationship.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. Tapered roller bearing adjustment test system, characterized by: include: System host, tapered roller bearing adjustment experimental unit, electric control cabinet and spindle motor driver cabinet; the tapered roller bearing adjustment experimental unit is arranged in the system host, a spindle is arranged at the axial center of the tapered roller bearing adjustment experimental unit, one end of the spindle is the driving end of the tapered roller bearing adjustment experimental unit; a spindle servo motor is arranged outside the driving end of the bearing adjustment experimental unit, and the servo motor is installed in the spindle motor driver cabinet outside the system host; an electric control cabinet is arranged near the spindle motor driver cabinet; the system host is connected to the electric control cabinet through cables, and the spindle motor driver cabinet is connected to the electric control cabinet through cables; a hydraulic station is also arranged outside the system host, and the hydraulic station is connected to the electric control cabinet through cables.

2. The tapered roller bearing assembly and adjustment experimental system according to claim 1, characterized in that: The tapered roller bearing adjustment test unit comprises: 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, a shaft system matching component and a casting unit; two ends of the main shaft are respectively connected to a tapered roller test bearing, and the main shaft and the two tapered roller test bearings are interference fit; one end of the adjustment test unit in the direction of one tapered roller test bearing 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; the two sets of tapered roller test bearings are connected to the casting unit of the adjustment test unit through the loading sleeve of the axial force loading device and the shaft system matching component, and 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.

3. The tapered roller bearing assembly and adjustment experimental system according to claim 2, characterized in that: The shaft system matching components include: a sleeve and a spacer assembly; the inner rings of two sets of tapered roller test bearings are interference fit on the main shaft, and the outer diameter and outer end surface of the outer ring are connected to the sleeve through a loading sleeve; the casting unit includes: a casting cover and a casting seat; the sleeve is embedded between the casting cover and the casting seat.

4. The tapered roller bearing assembly and adjustment experimental 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, the inner ring is connected to the main shaft, the outer ring is installed outside the inner ring, and the outer ring is 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 areas in the installation and adjustment experimental unit; the two ends of the radial loading sleeve limit the two sets of cylindrical roller test bearings by their own spacer assemblies; wherein, the loading sleeve located in the left area is the first loading sleeve, and the loading sleeve located in the right area is the second loading sleeve; the spacer assembly close to the direction of the first loading sleeve is the first spacer assembly.

5. The tapered roller bearing assembly and adjustment experimental system according to claim 4, characterized in that: The first spacer assembly includes: Inner spacer, outer spacer and outer spacer ring; the inner spacer is connected to the main shaft, the outer spacer ring is arranged on the outer diameter of the inner spacer, and the outer diameter of the outer spacer ring is connected to the outer spacer; the two ends of the outer spacer are respectively in contact with the end face of the radial loading sleeve and the end face of the first loading sleeve; the two ends of the inner spacer are respectively in contact with the main shaft shoulder at the inner diameter position of the cylindrical roller test bearing and the inner ring end face of the tapered roller test bearing in the left part area; the structure of the second spacer ring assembly and the connection method of the second spacer ring assembly in the right part area of ​​the installation and adjustment experimental unit are exactly the same as those of the first spacer ring.

6. The tapered roller bearing assembly and adjustment experimental system according to claim 4, characterized in that: The axial force loading device comprises: an axial loading head and a loading sleeve; the axial loading head is connected to the outer end surface of the first loading sleeve, and the axial loading head extends out of the outer end of the adjustment experiment unit and is connected to the external end cover.

7. The tapered roller bearing assembly and adjustment experimental system according to claim 2, characterized in that: The axial force detection device installed on the axial force loading device includes a force sensor, which is connected to a flange close to and connected to the axial loading head through bolts; the load size can be detected in real time through the force sensor.

8. The tapered roller bearing assembly and adjustment experimental system according to claim 7, characterized in that: The force sensor model is a BK-4C spoke-type pressure sensor, and its accuracy is better than ±0.5%FS.

9. The tapered roller bearing assembly and adjustment experimental 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 includes three axial displacement sensors, and each set of displacement measurement units forms three measurement points with the loading end experimental bearing respectively; the three measurement points of one set of displacement measurement units are located at the end face of the inner ring of the experimental bearing, that is, three axial displacement sensors are arranged on the end face of the inner ring and the three axial displacement sensors are distributed at 120° on the end face of the inner ring of the experimental bearing; the three measurement points of the other set of displacement measurement units are located at the end face of the outer ring of the experimental bearing, that is, three axial displacement sensors are arranged on the end face of the outer ring and the three axial displacement sensors are distributed at 120° on the end face of the outer ring of the experimental bearing; The above six displacement sensors are located on the end face of the experimental bearing at the loading end and fixed on the same end cover with screws, and the connecting wires on each displacement sensor are connected to the electric control cabinet; the displacement sensor adopts a contact displacement sensor, and the contact displacement sensor adopts a Keyence GT2-P12K high-precision displacement sensor.

10. A method for using the tapered roller bearing assembly and adjustment test system according to any one of claims 1 to 9, characterized in that: Based on the above system structure, data is collected through measurement to form a force-displacement relationship; the specific measurement method is as follows: First, a dynamic running-in test is carried out on the bearing, and then the rotation is stopped. Secondly, high-precision contact displacement sensors are installed on the end faces of the outer and inner rings of the experimental bearing at the loading end for static measurement, and the sensor positions are adjusted so that the initial values ​​of all sensors are consistent and in good operating condition. The load is then gradually loaded through the axial force loading device. After repeated practice, when the initial axial force is 4kN, the measured value of the displacement sensor is reset to zero relative to this position, that is, the bearing deformation is zero. Static experiments are carried out under axial load, and through repetitive experiments, the load-deformation relationship is formed. According to the load-deformation relationship, the measured data is processed by the software system to obtain the load-deformation relationship curve. The initial value of the above-mentioned adjustment sensor is about 3000µm.

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