CN111504642B - Bearing experiment table capable of applying complex load - Google Patents
Bearing experiment table capable of applying complex load Download PDFInfo
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- 238000013461 design Methods 0.000 abstract description 12
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to the field of design of bearing performance testing devices, and relates to a bearing performance testing experiment table capable of applying complex load. The device can realize the joint application of axial, radial, moment load and dynamic and static load of the bearing, provides a design method of an experimental bearing pedestal under complex load and a design scheme of a self-centering loading device, and solves the problem that the actual working condition of the bearing is difficult to simulate in the current bearing performance detection.
Description
Technical Field
The invention belongs to the field of design of bearing performance testing devices, and relates to a bearing performance testing experiment table capable of applying complex load.
Background
The bearing is widely used as a supporting part in rotary machines in various industries such as aerospace, military industry, medical treatment and the like, and in most cases, the bearing runs under the action of various combined loads, if the bearing capacity of bearing a certain load does not reach the standard, the bearing fault can be caused, for example, the bearing capacity of bearing offset load is insufficient, the bearing is subjected to faults such as offset wear, local falling and the like, and the running of the whole machine is influenced more seriously, so that the full detection of the bearing capacity of bearing complex loads is extremely important.
A plurality of patents and papers exist at home and abroad to design a test bed for detecting the performance of the bearing, but the designed test bed has no good applicability because the load working condition born by the bearing is not fully considered. For example, a dynamic and static load combined loading device (2012205749696) of a thrust bearing experiment table is designed to be an application device of dynamic and static combined load of the thrust bearing, the device realizes the combined application of the dynamic and static load of the thrust bearing by utilizing the combination of a spring and a motor, but the device can only be applied to the thrust bearing and cannot apply radial load and unbalanced load; the rolling bearing experiment table (2008300578746) designs a bearing experiment table which applies axial and radial loads to a bearing by utilizing a lead screw, but the experiment table cannot apply dynamic load and unbalanced load due to the defects of the experiment table design and the lack of a reasonable power device; a radial rolling bearing experiment table (2017212697059) designs a radial rolling bearing experiment table with a power device arranged at the bottom of a test device of the experiment table, which realizes the combined application of dynamic and static loads and radial and bearing loads, but the experiment table has no unbalanced load application device and is only suitable for radial rolling bearings, so that the device has no universal applicability.
Disclosure of Invention
Aiming at the problem that the prior bearing experiment table is difficult to apply complex load, the invention designs a bearing experiment table capable of applying complex load, the device can realize the joint application of axial, radial, moment load and dynamic and static load of the bearing, and provides a design method of an experiment bearing pedestal under the complex load and a design scheme of a self-centering loading device, thereby solving the problem that the actual working condition of the bearing is difficult to simulate in the prior bearing performance detection.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
A bearing experiment table capable of applying complex load comprises a supporting device 1, a loading device 2, an experiment device 3 and a testing device 4; the supporting device 1 is a supporting device of the loading device 2 and the experimental device 3; the loading device 2 is used for completing the application of complex load; the experimental device 3 is an installation device of an experimental bearing; the testing device 4 is a sensor, and different sensors can be selected and arranged according to the data to be tested by an experimenter.
The supporting device 1 comprises an experiment table integral bracket 11, a main shaft left end supporting bearing 12 and a main shaft right end supporting bearing 13; the experiment table integral support 11 is an integral support of a bearing experiment table and is of an n-shaped structure, the bottom of the experiment table integral support is fixedly arranged on a foundation, mounting holes are symmetrically formed in the left side and the right side of the middle of the experiment table integral support 11 and are respectively used for mounting a main shaft left end supporting bearing 12 and a main shaft right end supporting bearing 13.
The loading device 2 is positioned in the inner space of the integral bracket 11 of the experiment table and comprises an axial upper end loading device 21, an axial lower end loading device 22 and a radial loading device 23 which have the same structure, so that load application in three directions is realized; the axial upper end loading device 21 and the axial lower end loading device 22 are horizontally arranged on the same side of the integral bracket 11 of the experiment table and are respectively positioned above and below the left end supporting bearing 12 of the main shaft; the radial loading device 23 is vertically installed on the foundation;
Taking the axial upper end loading device 21 as an example, the axial upper end loading device 21 comprises a loading hydraulic cylinder main body 211, a loading joint body 212 and a pressure sensor 213; the axial upper end loading hydraulic cylinder main body 211 is arranged on the integral support 11 of the experiment table, the front end of the axial upper end loading hydraulic cylinder main body is of a sphere structure, the axial upper end loading joint body 212 and the end part of the sphere structure are fixedly connected into a whole, a self-centering function is realized, and the loading direction is always directed in the axial direction; the front end of the loading joint body 212 is matched with the upper end force transmission structure 331 of the experimental device 3, so that the load applied by the axial upper end loading device 21 is transmitted to the bearing seat 33; and a pressure sensor 213 is arranged between the loading joint body 212 and the upper end force transmission structure 331, and is used for testing the load applied by the axial upper end loading device 21.
An upper end notch 2121 and a lower end notch 2122 are arranged at the position where the axial upper end loading joint body 212 is matched with the upper end force transmission structure 331; the guide block 3311 on the side of the upper force transmission structure 331 is clamped in the upper notch 2121 to prevent the loading joint body 212 from rotating; the lower notch 2122 is a lead-out port of the pressure sensor 213.
The experimental device 3 comprises a main shaft 31, a bearing seat bracket 32, a bearing seat 33, a bearing cover 34 and an experimental bearing 35; two ends of the main shaft 31 are arranged on the main shaft left end supporting bearing 12 and the main shaft right end supporting bearing 13, and an experiment bearing 35 is arranged in the middle of the main shaft 31; the experiment bearing 35 is installed on the bearing housing 33, and the bearing cap 34 is installed on the bearing housing 33 to compress the experiment bearing 35; the outer end of the main shaft 31 is connected with a motor to realize the test of the dynamic performance of the bearing.
The bearing seat 33 is provided with a mounting hole 332 in the middle for mounting the experimental bearing 35, and the bearing seat 33 is provided with a front end supporting rod 334, a rear end supporting rod 335, an upper end force transmission structure 331, a lower end force transmission structure 333 and a radial force transmission structure 336; the front end supporting rod 334 and the rear end supporting rod 335 have the same structure and are respectively positioned on the front end surface and the rear end surface of the bearing seat 33, the upper end force transmission structure 331 and the lower end force transmission structure 333 are positioned on the same side surface of the bearing seat 33, and the radial force transmission structure 336 is positioned on the bottom surface of the bearing seat 33; the upper end force transmission structure 331, the lower end force transmission structure 333 and the radial force transmission structure 336 are rod-shaped structures and are respectively matched with loading joints of the axial upper end loading device 21, the axial lower end loading device 22 and the radial loading device 23, so that the load applied by the loading devices acts on the bearing seat 33, and the load is transferred to the experimental bearing 35;
the two bearing seat supports 32 are symmetrically arranged on two sides of the bearing seat 33; the bottom of the bearing seat bracket 32 is provided with a bolt hole 323 to fix the bearing seat bracket 32 on the foundation; the inside at bearing frame support 32 upper portion is equipped with slider guide rail 322, two sliders 321 install respectively in two slider guide rails 322, the middle part of slider 321 is equipped with the trompil, front end bracing piece 334 and rear end bracing piece 335 are installed respectively in the trompil of two sliders 321, slider 321 slides from top to bottom in slider guide rail 322 under the hydraulic means effect of radial loading device 23, thereby drive bearing frame 33 and slide from top to bottom along bearing frame support 32 with front end bracing piece 334 and rear end bracing piece 335, and axial upper end loading device 21 or axial lower end loading device 22's hydraulic means can make front end bracing piece 334 and rear end bracing piece 335 rotate in slider 321's trompil, realize bearing frame 33 and take place to rotate when axial upper end loading device 21 or axial lower end loading device 22 applyed moment load.
The beneficial effects of the invention are as follows:
The invention provides a design scheme of a bearing experiment table capable of applying complex load, and the experiment table can apply radial load, axial load and moment load of a bearing and can realize static and dynamic performance test of the bearing. The experiment table comprises a bearing seat structure capable of selectively limiting irrelevant degrees of freedom, and the bearing seat can realize the functions of releasing the rotational degrees of freedom of the bearing in the moment direction and limiting the other degrees of freedom under moment load and releasing the degrees of freedom of the bearing in the radial load direction and limiting the other degrees of freedom under radial load. Meanwhile, the experiment table comprises a loading structure capable of being automatically centered, so that the loading direction is not influenced by bearing deformation and always points to the initial loading direction. The invention also provides an application mode of various loads of the experimental bearing, and the invention can be used for detecting the dynamic performance and the static performance of the bearing under complex working conditions.
Drawings
FIG. 1 is an overall schematic diagram of a bearing laboratory bench to which complex loads may be applied in accordance with the present invention;
FIG. 2 is a longitudinal half-sectional view of the experimental set-up of the invention;
FIG. 3 is a transverse half-section of the experimental setup of the invention;
FIG. 4 is a partial cross-sectional view of the self-centering loader joint of the present invention;
FIG. 5 is a schematic view of an experimental bearing housing;
FIG. 6 is a schematic view of an experimental bearing housing bracket;
FIG. 7 is a schematic diagram of the mating of a test bearing housing with a test bearing housing bracket;
fig. 8 is a schematic diagram of a test apparatus.
In the figure: 1a supporting device, 2a loading device, 3 an experimental device and 4 a testing device;
The whole support of the experiment table 11, the support bearing at the left end of the main shaft 12 and the support bearing at the right end of the main shaft 13;
21 axial upper loading means, 22 axial lower loading means, 23 radial loading means;
211 hydraulic cylinder main body, 212 joint body, 213 pressure sensor, 2121 upper end gap, 2122 lower end gap;
31 main shaft, 32 bearing seat support, 33 bearing seat, 34 bearing cover and 35 experimental bearing;
321, 322 slide block guide rail, 323 bolt hole, 331 upper end force transmission structure, 332 mounting hole, 333 lower end force transmission structure, 334 front end support bar, 335 rear end support bar, 336 radial force transmission structure; 3311 guide block;
41 upper end eddy current sensor, 42 lower end eddy current sensor.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and technical schemes.
As shown in fig. 1 and 8, a bearing experiment table capable of applying complex load according to the present invention includes a supporting device 1, a loading device 2, an experiment device 3 and a testing device 4. The supporting device 1 is a supporting device of the loading device 2 and the testing device 3; the loading device 2 is a core device of the bearing experiment table, and the loading device 2 can finish the application of complex load; the experimental device 3 is an installation device of an experimental bearing; the testing device 4 can be arranged at the discretion of the experimenter, and is generally arranged around the experimental device 3.
As shown in fig. 2, the support device 1 includes a laboratory bench whole support 11, a main shaft left end support 12, and a main shaft right end support 13.
The whole support 11 of the experiment table is the whole support of the bearing experiment table, and is connected with a foundation through bolts, and support bearing mounting holes of a support bearing 12 at the left end of a main shaft and a support bearing 13 at the right end of the main shaft are symmetrically arranged on the whole support 11 of the experiment table.
The main shaft left end support bearing 12 and the main shaft right end support bearing 13 are support devices of the main shaft 31, and are used for enabling the main shaft 31 to rotate under the action of a motor so as to test the dynamic performance of the bearings.
As shown in fig. 2, the loading device 2 comprises an axial upper end loading device 21, an axial lower end loading device 22 and a radial loading device 23, and is positioned in the inner space of the integral bracket 11 of the experiment table. The axial upper end loading device 21 and the axial lower end loading device 22 are symmetrically arranged on the integral bracket 11 of the experiment table through bolts, the axial upper end loading device 21 and the axial lower end loading device 22 are respectively positioned above and below the main shaft 31, are symmetrically arranged, and the radial loading device 23 is arranged on a foundation and positioned below the main shaft 31;
The axial upper end loading means 21, the axial lower end loading means 22 and the radial loading means 23 are identical in structure and will be described by taking the axial upper end loading means 21 as an example. As shown in fig. 4, the axial upper end loading device 21 includes a loading cylinder main body 211, a loading joint body 212, and a pressure sensor 213. The front end of the loading hydraulic cylinder main body 211 is of a sphere structure, the sphere structure is matched with the loading connector body 212, and the sphere structure and the loading connector body are of an integrated structure to form the self-centering loading device. Because the hydraulic cylinder main body 211 is fixedly arranged on the experiment table integral bracket 11, the spherical center position of the sphere at the front end of the loading hydraulic cylinder main body 211 is unchanged, the loading joint body 212 can rotate along with the angular deformation of the bearing seat 33 under the action of moment load, but the spherical center of the sphere at the front end of the loading hydraulic cylinder main body 211 and the center of the spherical pit of the loading joint body 212 are always coincided. The contact position of the ball-shaped concave pit of the front end ball structure of the loading hydraulic cylinder main body 211 and the loading connector body 212 is always right in front of the ball-shaped concave pit of the front end ball structure of the loading hydraulic cylinder main body 211, so that the direction of the load applied by the axial upper end loading device 21 is always directed to the right front of the ball-shaped concave pit of the front end ball structure of the loading hydraulic cylinder main body 211 by the ball center, the loading direction is not influenced by the deformation of the bearing seat, the loading direction is always directed to the axial direction, and the loading connector body 212 is matched with the upper end force transmission structure 331 to transfer the load applied by the axial upper end loading device 21 to the bearing seat 33. And a pressure sensor 213 is arranged between the loading joint body 212 and the upper end force transmission structure 331, and the load applied by the axial upper end loading device 21 is directly read by the axial upper end loading sensor 213.
An upper notch 2121 and a lower notch 2122 are provided where the axial upper loading joint 212 mates with the upper force transfer structure 331. The upper notch 2121 mates with a guide block 3311 on the upper force transfer structure 331 to prevent rotation of the loading adapter body 212. The lower end notch 2122 is a lead wire outlet port axially upper-end-loaded with the force sensor 213. The axial upper end loading device 21, the axial lower end loading device 22 and the radial loading device 23 can realize load application in three directions.
As shown in fig. 3, the experimental device 3 includes a main shaft 31, a bearing housing 32, a shaft bearing housing 33, a bearing cap 34, and an experimental bearing 35. The experimental bearing 35 can be replaced according to the experimental requirements.
As shown in fig. 2, both ends of the main shaft 31 are mounted on the main shaft left end support bearing 12 and the main shaft left end support bearing 13, the experiment bearing 35 is mounted on the bearing housing 33, and the bearing cap 34 is mounted on the bearing housing 33. Meanwhile, the right end of the main shaft 31 can be connected with a power source such as a motor and the like, so that the dynamic performance of the bearing can be tested.
As shown in fig. 6 and 7, the bearing support 32 is provided in two, and is distributed on both sides of the bearing support 33. The bottom of the bearing seat bracket 32 fixes the bearing seat bracket 32 on the foundation through bolt holes 323 and bolts; the inboard on bearing frame support 32 upper portion is equipped with slider guide rail 322, and slider 321 installs in slider guide rail 322, and slider 321's middle part is equipped with the trompil, and front end bracing piece 334 and rear end bracing piece 335 are installed respectively in the trompil of two sliders 321, have realized the function of bearing frame 33 optional restriction irrelevant degree of freedom. For example, in the bearing rigidity test, the deformation of the bearing in the load direction needs to be tested, but the deformation cannot be limited by the bearing seat constraint, the bearing seat 33 and the bearing seat support 32 designed by the invention can realize that the radial movement freedom degree of the bearing seat 33 is released under the action of the radial loading device 23, and the rotation freedom degree is released under the action of the axial upper end loading device 21 or the axial lower end loading device 22.
As shown in fig. 5, a mounting hole 332 is formed in the middle of the bearing seat 33 for mounting the experimental bearing 35, and an upper end force transmission structure 331, a lower end force transmission structure 333, a radial force transmission structure 336, a front end support rod 334 and a rear end support rod 335 with the same structure are arranged on the bearing seat 33.
The upper end force transmission structure 331, the lower end force transmission structure 333 and the radial force transmission structure 336 are respectively matched with the axial upper end loading device 21, the axial lower end loading device 22 and the radial loading device 23, so that the load applied by the loading devices acts on the bearing seat 33, and the load is transferred to the experimental bearing 35. The front end support bar 334 and the rear end support bar 335 are respectively engaged with the two sliders 321.
The test device 4 can perform sensor arrangement according to the needs of the experimenter, as shown in fig. 4, only the upper end eddy current sensor 41 and the lower end eddy current sensor 42 are arranged at the same side of the bearing seat 33, and are opposite to the upper end force transmission structure 331 and the lower end force transmission structure 333, respectively, for testing the axial deformation of the experimental bearing 35 and the angular deformation of the experimental bearing 35 under the action of moment.
The load test was performed using the apparatus of the present invention, and the load application method of the test bearing 35 was as follows:
(1) Single radial load
When the experimental bearing 35 only bears a single radial load, the axial upper end loading device 21 and the axial lower end loading device 22 do not apply force, only the radial loading device 23 is used for applying radial load, and the applied radial load is directly read by a radial loading force sensor.
(2) Single axial load
When the experimental bearing 35 only bears a single axial load, the radial loading device 23 does not apply a load to the experimental bearing 35, and the axial upper end loading device 21 and the axial lower end loading device 22 apply the same magnitude of load, at this time, the experimental bearing 35 only bears a single axial load, and the magnitude of the axial load is the sum of the loads applied by the axial upper end loading device 21 and the axial lower end loading device 22.
(3) Moment load
When the experimental bearing 35 only bears moment action, the radial loading device 23 does not apply load to the experimental bearing, and according to the direction of the moment load, the axial upper end loading device 21 or the axial lower end loading device 22 is selected to apply load to the experimental bearing, and the moment loads generated by the axial upper end loading device 21 and the axial lower end loading device 22 are opposite in direction; the magnitude of the applied moment load is:
when a moment load is applied by the axial upper end loading device 21:
M＝F1·L3
when a moment load is applied by the axial lower end loading device 22:
M＝F2·L4
wherein M is the applied moment load; f 1 is the magnitude of the load applied by the axial upper end loading device 21; f 2 is the magnitude of the load applied by the axial lower end loading device 22; l3 is the distance from the axial upper end loading device 21 to the center of the spindle 31; l4 is the distance from the axial lower end loading device 22 to the center of the spindle 31.
Under the action of moment load, the relative angular displacement of the inner ring and the outer ring of the experimental bearing is as follows:
the calculation is performed by the test value of the upper-end eddy current sensor 41:
the following end eddy current sensor 42 test values are calculated:
Wherein θ is the relative angular displacement of the inner and outer rings; delta 1 is the deformation value measured by the upper-end eddy current sensor 41; l1 is the distance from the upper end eddy current sensor 41 to the center of the main shaft 31; delta 2 is the deformation value measured by the lower-end eddy current sensor 42; l2 is the distance from the lower end eddy current sensor 42 to the center of the spindle 31.
(4) Combined radial, axial and moment loading
When the experimental bearing 35 bears the combined action load of radial, axial and moment loads, the application of the radial load is directly realized by the radial loading device 23; the application of the axial load is that the two axial loading devices apply the load with the same size according to the single axial load application mode; when the moment load is applied, after the application of the radial load and the axial load is completed, the load is further applied to the axial upper end loading device 21 or the axial lower end loading device 22, and the magnitude of the moment load is calculated according to the calculation method.
(5) Dynamic and static combined action load
When the experimental bearing 35 bears dynamic and static combined action load, a power device such as a motor is connected to the right end of the main shaft 31, so that the bearing is in a working state, and corresponding bearing static load is applied according to the four load application modes, so that combined application of the dynamic and static loads of the bearing is realized.
Claims (1)
1. The bearing experiment table capable of applying the complex load is characterized by comprising a supporting device (1), a loading device (2), an experiment device (3) and a testing device (4); the supporting device (1) is a supporting device of the loading device (2) and the experimental device (3); the loading device (2) is used for completing the application of complex load; the experimental device (3) is an installation device of an experimental bearing; the testing device (4) is a sensor, and different sensors are selected and arranged according to data to be tested by an experimenter;
The supporting device (1) comprises an integral support (11) of the experiment table, a supporting bearing (12) at the left end of the main shaft and a supporting bearing (13) at the right end of the main shaft; the experiment table integral support (11) is an integral support of a bearing experiment table and is of an n-shaped structure, the bottom of the experiment table integral support is fixedly arranged on a foundation, mounting holes are symmetrically formed in the left side and the right side of the middle of the experiment table integral support (11), and the mounting holes are respectively used for mounting a main shaft left end supporting bearing (12) and a main shaft right end supporting bearing (13);
The loading device (2) is positioned in the inner space of the integral bracket (11) of the experiment table and comprises an axial upper end loading device (21), an axial lower end loading device (22) and a radial loading device (23) which have the same structure, so that load application in three directions is realized; the axial upper end loading device (21) and the axial lower end loading device (22) are horizontally arranged on the same side of the integral bracket (11) of the experiment table and are respectively positioned above and below the left end supporting bearing (12) of the main shaft; the radial loading device (23) is vertically arranged on the foundation;
the axial upper end loading device (21) comprises a loading hydraulic cylinder main body (211), a loading joint body (212) and a pressure sensor (213); the axial upper end loading hydraulic cylinder main body (211) is arranged on the integral support (11) of the experiment table, the front end of the axial upper end loading hydraulic cylinder main body is of a sphere structure, the axial upper end loading joint body (212) is fixedly connected with the end part of the sphere structure into a whole, a self-centering function is realized, and the loading direction is always directed in the axial direction; the front end of the loading joint body (212) is matched with an upper end force transmission structure (331) of the experimental device (3) to transmit the load applied by the axial upper end loading device (21) to the bearing seat (33); a pressure sensor (213) is arranged between the loading joint body (212) and the upper end force transmission structure (331) and is used for testing the load applied by the axial upper end loading device (21);
An upper end notch (2121) and a lower end notch (2122) are arranged at the matching position of the axial upper end loading joint body (212) and the upper end force transmission structure (331); the guide block (3311) on the side surface of the upper end force transmission structure (331) is clamped in the upper end notch (2121) to prevent the loading joint body (212) from rotating; the lower end notch (2122) is a lead outlet of the loading connector body (213);
The experimental device (3) comprises a main shaft (31), a bearing seat bracket (32), a bearing seat (33), a bearing cover (34) and an experimental bearing (35); two ends of the main shaft (31) are arranged on a main shaft left end supporting bearing (12) and a main shaft right end supporting bearing (13), and an experimental bearing (35) is arranged in the middle of the main shaft (31); the experimental bearing (35) is arranged on the bearing seat (33), and the bearing cover (34) is arranged on the bearing seat (33) to compress the experimental bearing (35); the outer end of the main shaft (31) is connected with a motor to realize the test of the dynamic performance of the bearing;
The bearing seat (33) is provided with a mounting hole (332) at the middle part for mounting the experimental bearing (35), and the bearing seat (33) is provided with a front end supporting rod (334), a rear end supporting rod (335), an upper end force transmission structure (331), a lower end force transmission structure (333) and a radial force transmission structure (336); the front end supporting rod (334) and the rear end supporting rod (335) are identical in structure and are respectively positioned on the front end face and the rear end face of the bearing seat (33), the upper end force transmission structure (331) and the lower end force transmission structure (333) are positioned on the same side face of the bearing seat (33), and the radial force transmission structure (336) is positioned on the bottom face of the bearing seat (33); the upper end force transmission structure (331), the lower end force transmission structure (333) and the radial force transmission structure (336) are rod-shaped structures and are respectively matched with loading connectors of the axial upper end loading device (21), the axial lower end loading device (22) and the radial loading device (23), so that the load applied by the loading device acts on the bearing seat (33) and then the load is transferred to the experimental bearing (35);
the two bearing seat supports (32) are symmetrically arranged at two sides of the bearing seat (33); the bottom of the bearing seat bracket (32) is provided with a bolt hole (323) so as to fix the bearing seat bracket (32) on a foundation; the inner side of the upper part of the bearing seat bracket (32) is provided with a slide block guide rail (322), two slide blocks (321) are respectively arranged in the two slide block guide rails (322), the middle part of each slide block (321) is provided with an opening, a front end supporting rod (334) and a rear end supporting rod (335) are respectively arranged in the openings of the two slide blocks (321), and the slide blocks (321) slide up and down in the slide block guide rails (322) under the action of a hydraulic device of the radial loading device (23), so that the bearing seat (33) is driven to slide up and down along the bearing seat bracket (32) together with the front end supporting rod (334) and the rear end supporting rod (335); the hydraulic device of the axial upper end loading device (21) or the axial lower end loading device (22) can enable the front end supporting rod (334) and the rear end supporting rod (335) to rotate in the opening of the sliding block (321), so that the bearing seat (33) rotates when moment load is applied by the axial upper end loading device (21) or the axial lower end loading device (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010515065.5A CN111504642B (en) | 2020-06-08 | 2020-06-08 | Bearing experiment table capable of applying complex load |
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| CN202010515065.5A CN111504642B (en) | 2020-06-08 | 2020-06-08 | Bearing experiment table capable of applying complex load |
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| CN111504642A CN111504642A (en) | 2020-08-07 |
| CN111504642B true CN111504642B (en) | 2024-05-28 |
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| CN112198344B (en) * | 2020-10-19 | 2021-11-19 | 华中科技大学 | Full-freedom-degree bearing-free motor test platform |
| CN113281043B (en) * | 2021-04-28 | 2023-06-06 | 重庆长江轴承股份有限公司 | Dynamic stiffness testing device for bearing |
| CN113390639A (en) * | 2021-07-02 | 2021-09-14 | 苏州轴承厂股份有限公司 | Tool and method for detecting rated static load of radial rolling bearing |
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