Biaxial loading bearing fault test platform

Abstract

A biaxial loading bearing fault test platform comprises a working platform which is provided with a test bearing seat device, an auxiliary bearing seat device, an accompanying test bearing seat device, a motor driving device, an axial loading device and a radial loading device. The test bearing seat device comprises a floating base, a test bearing seat, a test bearing and a stepped shaft. The test bearing seat is slidably connected with the floating end of the floating base in the horizontal Y-axis direction. The outer ring of the test bearing is fixed in the test bearing seat, and the inner ring of the test bearing is sleeved and fixed on the periphery of the stepped shaft. The device can simulate the real working environment of the test bearing, so as to research the fault signal and analysis rule of the test bearing under the axial and radial load coupling effect, support accurate load application and fault signal judgment, and is especially suitable for the field of bearing fault detection. Various simulation tests can be carried out by replacing test bearings of different specifications. And meanwhile, the method has good expandability.

Description

Technical Field

[0001] The invention relates to the field of mechanical environment testing, and in particular to a double axial loading bearing fault testing platform. Background Art

[0002] As a key component, the performance and reliability of high-speed train bearings directly affect the safety and operation efficiency of the train. High-speed train bearings usually need to withstand complex loads during train operation, especially radial and axial alternating loads. These alternating loads mainly come from the unevenness of the track when the train is running at high speed, curve driving, and inertia during acceleration and deceleration. In actual operation, these alternating loads will cause complex stress states between the rolling elements and raceways inside the bearings, especially when the bearings fail, which can easily cause major accidents and irreversible losses. Therefore, in order to better simulate the actual working conditions of the bearings under fault conditions, it is necessary to build a high-precision simulation platform. The platform can reproduce the radial and axial alternating loads that the bearings bear when running at high speeds, thereby providing a scientific basis for bearing fault diagnosis and design improvements, and ultimately improving the reliability and service life of high-speed rail operations.

[0003] The Chinese patent with the authorization announcement number CN108801636B, an axial loading device for a bearing performance test platform, and the Chinese patent with the authorization announcement number CN108760303B, a radial loading device for a bearing performance test platform, discloses a test object of a magnetic fluid dual suspension bearing. It mainly provides a radial loading device and an axial loading device on a platform corresponding to the step shaft, and the exciting force of the vibration source is transmitted to the step shaft, thereby providing an axial / radial load for the step shaft, and the axial load force of the step shaft can be regulated by adjusting the vibration frequency and amplitude of the vibration motor.

[0004] The Chinese patent application publication number CN118310747A discloses a bearing test device for high-speed trains. The platform is used as the installation base of the test device, which is suitable for fixing it on a work surface or a workbench. The support shaft of the support mechanism is used as the main shaft of the axle box to be tested, which is suitable for assembling the bearing in the axle box to be tested. The first temperature measuring component in the temperature measuring mechanism is suitable for detecting the first temperature of at least two positions of the inner ring of the bearing, and the second temperature measuring component is suitable for detecting the second temperature of the outer ring of the bearing. In this way, the temperature distribution of different positions of the bearing can be obtained, and the cause of the temperature abnormality can be further discovered by mutual verification of the correlation between the first temperature and the second temperature obtained.

[0005] Although the test devices of the above three patented technologies can load axial and radial loads at the same time, the loading method is to indirectly apply the load to the tested bearing through the auxiliary bearing. This method makes the excitation signal received by the bearing complicated, thereby interfering with the fault signal of the faulty bearing, so the fault signal of the faulty bearing cannot be accurately tested.

[0006] In summary, among the equipment currently used for bearing fault testing, it is very rare to be able to directly apply axial and radial coupled loads to bearings. Most of the existing equipment uses a loading method based on auxiliary bearings, which is difficult to truly reflect the effect of the load on the tested bearing, resulting in the inability to accurately apply loads to the test bearing and determine fault signals.

[0007] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a dual axial loading bearing fault testing platform.

[0008] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the present invention. Summary of the invention

[0009] In order to overcome the deficiencies in the above-mentioned prior art, the present invention aims to disclose a dual-axial loading bearing fault test platform for solving the problem that the existing bearing fault test equipment is difficult to truly simulate the effect of the load on the tested bearing.

[0010] The present invention discloses a dual axial loading bearing fault testing platform, comprising a working platform, on which are provided: A test bearing seat device, the test bearing seat device comprises a floating base, a test bearing seat, a test bearing and a stepped shaft, the floating base is fixed on the working platform, the test bearing seat and the floating end of the floating base are slidably connected along the horizontal Y-axis direction, so that the test bearing seat can move freely in the Y-axis direction, and the movement in the X-axis direction can be constrained within a certain range; the outer ring of the test bearing is fixed in the test bearing seat, and the inner ring of the test bearing is sleeved and fixed on the outer periphery of the stepped shaft, so that the Y-axis load on the test bearing seat can be directly transmitted to the outer ring of the test bearing, and the X-axis load on the stepped shaft can be directly transmitted to the inner ring of the test shaft; The outer periphery of the left section of the stepped shaft is slidably connected with the accompanying test bearing seat device along the horizontal X-axis direction, so that the stepped shaft is subjected to a load in the X-axis direction and will not be applied to the accompanying test bearing seat device; Auxiliary bearing seat device, the outer periphery of the right section of the stepped shaft is slidably connected with the auxiliary bearing seat device along the horizontal X-axis direction, and works together with the companion bearing seat device to make the rotation of the stepped shaft more stable, and prevent the stepped shaft from being subjected to the X-axis direction load on the auxiliary bearing seat device; The motor drive device, the output shaft of the motor drive device is connected to the left end of the step shaft through a bellows coupling, the motor drive device drives the step shaft to rotate at a high speed, and the bellows coupling is used to prevent the step shaft from generating periodic vibration due to non-concentricity with the output shaft of the motor drive device, so that the step shaft does not receive a load in the Y-axis direction at the motor drive device; An axial loading device, the output shaft of which is movably connected to the right end of the stepped shaft, and can apply a load to the stepped shaft along the X-axis direction, and directly transfer the load to the test bearing through the stepped shaft; A radial loading device, wherein the output shaft of the radial loading device is movably connected to the test bearing seat, and can apply a load to the test bearing seat along the Y-axis direction, and directly transfer the load to the test bearing through the test bearing seat.

[0011] Preferred technical solution: The axial loading device includes an X-direction vibrator, the output shaft of the X-direction vibrator is connected to a first sensor fixing seat, a first force sensor is provided on the first sensor fixing seat, the input end of the first force sensor is connected to an X-direction loading shaft, the X-direction loading shaft is arranged on the first sensor fixing seat through an X-direction thrust bearing, the front end of the X-direction loading shaft is movably connected to the right end of the stepped shaft, thereby increasing the output accuracy of the X-axis direction load.

[0012] Preferred technical solution: The radial loading device includes a Y-direction vibrator, the output shaft of the Y-direction vibrator is connected to a second sensor fixing seat, a second force sensor is provided on the second sensor fixing seat, the input end of the second force sensor is connected to a Y-direction loading shaft, the Y-direction loading shaft is arranged on the second sensor fixing seat through a Y-direction thrust bearing, and the front end of the Y-direction loading shaft is movably connected to the test bearing seat to increase the output accuracy of the Y-axis direction load.

[0013] The preferred technical solution is as follows: the front end of the X-direction loading shaft is a spherical surface, and the front end spherical surface of the X-direction loading shaft and the right end of the stepped shaft are connected by a point contact type activity, which reduces the difficulty of installation. At the same time, the first force sensor and the X-direction exciter do not bear rotational force; the front end of the Y-direction loading shaft is also a spherical surface, and the front end spherical surface of the Y-direction loading shaft and the test bearing seat are connected by a point contact type activity, which reduces the difficulty of installation. At the same time, the second force sensor and the Y-direction exciter are not affected by the vibration in the X-direction direction.

[0014] The preferred technical solution is as follows: a bearing seat guide rod with a rectangular cross-section is provided on the test bearing seat along the Y-axis direction, and at least two floating interfaces are provided on the floating base along the Y-axis direction, and the floating interface is composed of four buffer bearings; the four buffer bearings are arranged on the outer periphery of the bearing seat guide rod opposite to each other in pairs, and the outer periphery of the buffer bearing is movably connected to the side of the bearing seat guide rod, and the spacing between the relative buffer bearings is adjustable, so that the bearing seat guide rod and the test bearing seat can move freely along the Y-axis direction, and the movement range of the bearing seat guide rod and the test bearing seat in other directions can be constrained by changing the spacing between the relative buffer bearings.

[0015] Preferred technical solution: The test bearing seat device includes a test bearing seat connected to the working platform, a first cylindrical roller bearing is arranged in the test bearing seat, the outer ring of the first cylindrical roller bearing is fixedly connected to the test bearing seat, the inner ring of the first cylindrical roller bearing is sleeved and fixed on the outer circumference of the stepped shaft, and the inner ring and outer ring of the first cylindrical roller bearing are slidably connected along the X-axis direction.

[0016] Preferred technical solution: The auxiliary bearing seat device includes an auxiliary bearing seat connected to the working platform, a second cylindrical roller bearing is arranged in the auxiliary bearing seat, the outer ring of the second cylindrical roller bearing is fixedly connected to the auxiliary bearing seat, the inner ring of the second cylindrical roller bearing is sleeved and fixed on the outer circumference of the stepped shaft, and the inner ring and outer ring of the second cylindrical roller bearing are slidably connected along the X-axis direction.

[0017] Preferred technical solution: A plurality of monitoring holes are provided on the test bearing seat, and the monitoring holes are connected to the test bearing placement area so as to install more monitoring equipment and provide good scalability.

[0018] Optimal technical solution: The stepped shaft is divided into two sections, and the two sections of the stepped shaft are rigidly connected by a locking sleeve. The locking sleeve is arranged between the test bearing seat device and the fixed beam device to facilitate the replacement of the test bearing.

[0019] Preferred technical solution: A hydraulic oil source is also provided on the working platform to ensure the stable output of the loading device and adjust the output load.

[0020] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art: (1) The present invention provides a dual axial loading bearing fault test platform, which directly transmits the X-axis load to the inner ring of the test bearing through a stepped axial test bearing, and directly transmits the Y-axis load to the outer ring of the test bearing through a test bearing seat, thereby avoiding interference between the X-axis load and the Y-axis load during the transmission process, and can simulate the real working environment of the test bearing, so as to study the fault signals of the test bearing under the coupling of axial and radial loads, i.e., X-axis and Y-axis loads, and analyze the rules.

[0021] (2) A bellows coupling is used to connect the stepped shaft with the test bearing seat device and the auxiliary bearing seat device in a sliding connection along the horizontal X-axis direction, so that the X-axis load on the stepped shaft can be efficiently transmitted to the test bearing; a floating base is set under the test bearing seat, so that the Y-axis load on the test bearing seat can be efficiently transmitted to the test bearing, which can truly reflect the effect of the load on the test bearing, support accurate load application and fault signal judgment, and is particularly suitable for the field of bearing fault detection.

[0022] (3) The present invention has high universality and can perform various simulation tests by replacing test bearings of different specifications. At the same time, multiple monitoring holes are reserved on the test bearing seat to install more monitoring equipment, providing good scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A top view of a dual axial loading bearing fault testing platform of the present invention; Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A; Figure 3 This is a front view of a dual axial loading bearing fault testing platform of the present invention; Figure 4 It is a side view of a dual axial loading bearing fault testing platform of the present invention; Figure 5 It is a structural schematic diagram of the test bearing seat device in the present invention; Figure 6 for Figure 5 A cross-sectional view taken along line BB; Figure 7 It is a structural schematic diagram of the floating interface in the present invention; Figure 8 It is a structural schematic diagram of the test bearing seat device in the present invention; Fig. 9 It is a structural schematic diagram of the auxiliary bearing seat device in the present invention.

[0025] In the above drawings, 100, working platform; 1, test bearing seat device; 11, floating base; 11a, buffer bearing; 12, test bearing seat; 12a, bearing seat guide rod; 12b, monitoring hole position; 13, test bearing; 14, stepped shaft; 15, expansion sleeve; 2, accompanying test bearing seat device; 21, accompanying test bearing seat; 22, first cylindrical roller bearing; 3, auxiliary bearing seat device; 31, auxiliary bearing seat; 32, second cylindrical roller bearing; 4, motor drive device; 41, bellows coupling; 5, axial loading device; 51, X-direction exciter; 52, first sensor fixing seat; 53, first force sensor; 54, X-direction loading shaft; 55, X-direction thrust bearing; 6, radial loading device; 61, Y-direction exciter; 62, second sensor fixing seat; 63, second force sensor; 64, Y-direction loading shaft; 65, Y-direction thrust bearing; 7, hydraulic oil source. DETAILED DESCRIPTION

[0026] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and their synonyms are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the terms "install", "set", "provided with", "connect", "connected", "sleeved", and "fitted" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For another example, "fitted" can be completely close or partially close. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Example: like Figure 1 As shown, the present invention discloses a dual axial loading bearing fault test platform, including a working platform 100, on which a test bearing seat device 1, a companion test bearing seat device 2, an auxiliary bearing seat device 3, a motor drive device 4, an axial loading device 5 and a radial loading device 6 are provided. The main components of the present invention are described in detail below: like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the test bearing seat device 1 includes a floating base 11, a test bearing seat 12, a test bearing 13 and a stepped shaft 14. The floating base 11 is fixed on the working platform 100. The test bearing seat 12 is slidably connected to the floating end of the floating base 11 along the horizontal Y-axis direction. The outer ring of the test bearing 13 is fixed in the test bearing seat 12, and the inner ring of the test bearing 13 is sleeved and fixed on the outer periphery of the stepped shaft 14.

[0033] like Figure 1 , Figure 3 and Figure 8 As shown, the outer periphery of the left section of the stepped shaft 14 is slidably connected to the accompanying test bearing seat device 2 along the horizontal X-axis direction, and the stepped shaft 14 is supported by the accompanying test bearing seat device 2.

[0034] like Figure 1 , Figure 3 and Fig. 9 As shown, the outer periphery of the right section of the stepped shaft 14 is slidably connected to the auxiliary bearing seat device 3 along the horizontal X-axis direction, and the stepped shaft 14 is supported by the auxiliary bearing seat device 3.

[0035] like Figure 1 , Figure 3 and Figure 6As shown, the output shaft of the motor drive device 4 is connected to the left end of the stepped shaft 14 through a bellows coupling 41, allowing a certain error between the center height of the output shaft of the motor drive device 4 and the center height of the test bearing seat device 2 without causing the stepped shaft 14 to generate periodic vibration due to eccentricity, thereby reducing the impact on the fault signal of the test bearing 13 and allowing the stepped shaft 14 to move within a certain range in the X-axis direction.

[0036] like Figure 1 and Figure 3 As shown, the output shaft of the axial loading device 5 is movably connected to the right end of the stepped shaft 14, and can apply a load to the stepped shaft 14 along the X-axis direction.

[0037] like Figure 1 , Figure 3 and Figure 4 As shown, the output shaft of the radial loading device 6 is movably connected to the test bearing seat 12, and can apply a load to the test bearing seat 12 along the Y-axis direction.

[0038] refer to Figures 1 to 9 As shown, the method and principle of use of the present invention are as follows: when in use, the motor drive device 4 is started to drive the stepped shaft 14 to rotate through the bellows coupling 41. During this process, the bellows coupling 41 will eliminate the docking deviation between the output shaft of the motor drive device 4 and the stepped shaft 14, avoiding the vibration of the stepped shaft 14 caused by the docking deviation. At the same time, the accompanying bearing seat device 2 and the auxiliary bearing seat device 3 will raise the stepped shaft 14 so that the stepped shaft 14 can move smoothly along the X-axis direction under high-speed rotation. The axial loading device 5 is started to load the end of the stepped shaft 14. The applied load is directly transmitted to the inner ring of the test bearing 13 rigidly connected to the stepped shaft 14 through the stepped shaft 14; at the same time, the radial loading device 6 is started to apply load to the test bearing seat 12. Since the test bearing seat 12 is fixed on the working platform 100 through the floating base 11, the load applied to the test bearing seat 12 can be transmitted to the outer ring of the test bearing 13 without interference, so that the test bearing seat 12 is subjected to loads from the X-axis direction and the Y-axis direction at the same time, which truly and accurately simulates its operating environment and increases the accuracy of fault signal judgment.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in order to improve the output accuracy of the loading device, the axial loading device 5 includes an X-direction vibrator 51, the output shaft of the X-direction vibrator 51 is connected to a first sensor fixing seat 52, a first force sensor 53 is provided on the first sensor fixing seat 52, the input end of the first force sensor 53 is connected to an X-direction loading shaft 54, the X-direction loading shaft 54 ​​is arranged on the first sensor fixing seat 52 through an X-direction thrust bearing 55, the front end of the X-direction loading shaft 54 ​​is movably connected to the right end of the stepped shaft 14, so as to increase the output accuracy of the load in the X-axis direction.

[0040] The radial loading device 6 includes a Y-direction exciter 61, the output shaft of the Y-direction exciter 61 is connected to a second sensor fixing seat 62, a second force sensor 63 is provided on the second sensor fixing seat 62, the input end of the second force sensor 63 is connected to a Y-direction loading shaft 64, the Y-direction loading shaft 64 is arranged on the second sensor fixing seat 62 through a Y-direction thrust bearing 65, and the front end of the Y-direction loading shaft 64 is movably connected to the test bearing seat 12 to increase the output accuracy of the Y-axis direction load.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in order to further improve the output accuracy of the loading device, the front end of the X-direction loading shaft 54 ​​is a spherical surface, and the front end spherical surface of the X-direction loading shaft 54 ​​is connected to the right end of the stepped shaft 14 by a point contact type active connection, which reduces the difficulty of installation and at the same time makes the first force sensor 53 and the X-direction exciter 51 not affected by the rotational force; the front end of the Y-direction loading shaft 64 is also a spherical surface, and the front end spherical surface of the Y-direction loading shaft 64 is connected to the test bearing seat 12 by a point contact type active connection, which reduces the difficulty of installation and at the same time makes the second force sensor 63 and the Y-direction exciter 61 not affected by the vibration in the X-direction.

[0042] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7As shown, in order to reduce the motion interference of the test bearing seat 12 in the Y-axis direction, a bearing seat guide rod 12a with a rectangular cross-section is provided on the test bearing seat 12 along the Y-axis direction, and two floating interfaces are provided on the floating base 11 along the Y-axis direction, and the floating interface is composed of four buffer bearings 11a; the four buffer bearings 11a are arranged on the outer periphery of the bearing seat guide rod 12a opposite to each other in pairs, and the outer periphery of the buffer bearing 11a is movably connected to the side of the bearing seat guide rod 12a, and the movement resistance of the bearing seat guide rod 12a in the Y-axis direction is reduced by the buffer bearing 11a. At the same time, the outer periphery of the buffer bearing 11a and the side of the bearing seat guide rod 12a are connected to limit the radial rotation of the rectangular bearing seat guide rod 12a, thereby ensuring the stability of the test bearing seat 12; the floating range of the test bearing seat 12 in the X-axis direction is changed by adjusting the spacing between the relative buffer bearings 11a.

[0043] like Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, in order to further reduce the influence of high-speed rotation of the stepped shaft on its movement in the X-axis direction, the accompanying test bearing seat device 2 includes an accompanying test bearing seat 21 connected to the working platform 100, and a first cylindrical roller bearing 22 is arranged in the accompanying test bearing seat 21, and the outer ring of the first cylindrical roller bearing 22 is fixedly connected to the accompanying test bearing seat 21, and the inner ring of the first cylindrical roller bearing 22 is sleeved and fixed on the outer periphery of the stepped shaft 14, and the inner ring and the outer ring of the first cylindrical roller bearing 22 are slidably connected along the X-axis direction; the auxiliary bearing seat device 3 includes an auxiliary bearing seat 31 connected to the working platform 100, and a second cylindrical roller bearing 32 is arranged in the auxiliary bearing seat 31, and the outer ring of the second cylindrical roller bearing 32 is fixedly connected to the auxiliary bearing seat 31, and the inner ring of the second cylindrical roller bearing 32 is sleeved and fixed on the outer periphery of the stepped shaft 14, and the inner ring and the outer ring of the second cylindrical roller bearing 32 are slidably connected along the X-axis direction, thereby enhancing the stability of the stepped shaft 14 under high-speed rotation.

[0044] like Figure 1 , Figure 5 and Figure 6 As shown, in order to facilitate subsequent functional expansion, two monitoring holes 12b are provided on the test bearing seat 12, and the monitoring holes 12b are connected to the placement area of ​​the test bearing 13. During expansion, more monitoring equipment can be installed through the monitoring holes 12b to achieve more test functions.

[0045] like Figure 1 , Figure 3 and Figure 6As shown, in order to facilitate the installation of the test bearing, the stepped shaft 14 is divided into two sections, and the two sections of the stepped shaft 14 are rigidly connected by a clamping sleeve 15, and the clamping sleeve 15 is arranged between the test bearing seat device 1 and the fixed beam device 2. When installing the test bearing 13, it is only necessary to remove the clamping sleeve 15 and fix the test bearing 13 to the outer periphery of the stepped shaft 14 by a locking nut.

[0046] like Figure 1 As shown, in order to improve the stability of the test platform, a hydraulic oil source 7 is also provided on the working platform 100, through which the hydraulic oil source 7 provides power output for the axial loading device 5 and the radial loading device 6, which can provide a large thrust and ensure the stability of the load output.

[0047] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual axial loading bearing fault testing platform, comprising a working platform (100), characterized in that: The working platform (100) is provided with: A test bearing seat device (1), the test bearing seat device (1) comprising a floating base (11), a test bearing seat (12), a test bearing (13) and a stepped shaft (14), the floating base (11) being fixed on the working platform (100), the test bearing seat (12) being slidably connected to the floating end of the floating base (11) along a horizontal Y-axis direction, the outer ring of the test bearing (13) being fixed in the test bearing seat (12), and the inner ring of the test bearing (13) being sleeved and fixed on the outer periphery of the stepped shaft (14); A test companion bearing seat device (2), wherein the outer periphery of the left section of the stepped shaft (14) is slidably connected to the test companion bearing seat device (2) along the horizontal X-axis direction; An auxiliary bearing seat device (3), wherein the outer periphery of the right section of the stepped shaft (14) is slidably connected to the auxiliary bearing seat device (3) along the horizontal X-axis direction; A motor drive device (4), wherein an output shaft of the motor drive device (4) is drivingly connected to the left end portion of the stepped shaft (14) via a bellows coupling (41); An axial loading device (5), wherein an output shaft of the axial loading device (5) is movably connected to the right end of the stepped shaft (14) and can apply a load to the stepped shaft (14) along the X-axis direction; A radial loading device (6), wherein an output shaft of the radial loading device (6) is movably connected to the test bearing seat (12) and can apply a load to the test bearing seat (12) along the Y-axis direction.

2. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: The axial loading device (5) comprises an X-direction exciter (51), the output shaft of the X-direction exciter (51) is connected to a first sensor fixing seat (52), the first sensor fixing seat (52) is provided with a first force sensor (53), the input end of the first force sensor (53) is connected to an X-direction loading shaft (54), the X-direction loading shaft (54) is arranged on the first sensor fixing seat (52) via an X-direction thrust bearing (55), and the front end of the X-direction loading shaft (54) is movably connected to the right end of the stepped shaft (14).

3. A dual axial loading bearing fault testing platform according to claim 2, characterized in that: The radial loading device (6) comprises a Y-direction exciter (61), the output shaft of the Y-direction exciter (61) is connected to a second sensor fixing seat (62), a second force sensor (63) is provided on the second sensor fixing seat (62), an input end of the second force sensor (63) is connected to a Y-direction loading shaft (64), the Y-direction loading shaft (64) is arranged on the second sensor fixing seat (62) via a Y-direction thrust bearing (65), and a front end of the Y-direction loading shaft (64) is movably connected to the test bearing seat (12).

4. A dual axial loading bearing fault testing platform according to claim 3, characterized in that: The front end of the X-direction loading shaft (54) is a spherical surface, and the front end spherical surface of the X-direction loading shaft (54) is movably connected to the right end of the stepped shaft (14) by point contact; the front end of the Y-direction loading shaft (64) is also a spherical surface, and the front end spherical surface of the Y-direction loading shaft (64) is movably connected to the test bearing seat (12) by point contact.

5. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: A bearing seat guide rod (12a) having a rectangular cross-section is provided on the test bearing seat (12) along the Y-axis direction, and at least two floating interfaces are provided on the floating base (11) along the Y-axis direction, wherein the floating interfaces are composed of four buffer bearings (11a); the four buffer bearings (11a) are arranged opposite to each other on the periphery of the bearing seat guide rod (12a), and the periphery of the buffer bearings (11a) is movably connected to the side of the bearing seat guide rod (12a), and the spacing between the opposite buffer bearings (11a) is adjustable.

6. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: The accompanying test bearing seat device (2) comprises an accompanying test bearing seat (21) connected to the working platform (100), a first cylindrical roller bearing (22) is arranged in the accompanying test bearing seat (21), an outer ring of the first cylindrical roller bearing (22) is fixedly connected to the accompanying test bearing seat (21), an inner ring of the first cylindrical roller bearing (22) is sleeved and fixed on the outer circumference of the stepped shaft (14), and the inner ring and outer ring of the first cylindrical roller bearing (22) are slidably connected along the X-axis direction.

7. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: The auxiliary bearing seat device (3) comprises an auxiliary bearing seat (31) connected to the working platform (100), a second cylindrical roller bearing (32) is arranged in the auxiliary bearing seat (31), an outer ring of the second cylindrical roller bearing (32) is fixedly connected to the auxiliary bearing seat (31), an inner ring of the second cylindrical roller bearing (32) is sleeved and fixed on the outer circumference of the stepped shaft (14), and the inner ring and outer ring of the second cylindrical roller bearing (32) are slidably connected along the X-axis direction.

8. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: The test bearing seat (12) is provided with a plurality of monitoring holes (12b), and the monitoring holes (12b) are connected to the placement area of ​​the test bearing (13).

9. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: The stepped shaft (14) is divided into two sections, and the two sections of the stepped shaft (14) are rigidly connected via a clamping sleeve (15), wherein the clamping sleeve (15) is arranged between the test bearing seat device (1) and the fixed beam device (2).

10. A dual axial loading bearing fault testing platform according to claim 1, characterized in that: The working platform (100) is also provided with a hydraulic oil source (7).

Images