CN113639995A - Axial bearing performance testing device and method for heavy-duty planetary threaded roller bearing - Google Patents
Axial bearing performance testing device and method for heavy-duty planetary threaded roller bearing Download PDFInfo
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Abstract
An axial bearing performance test device and an axial bearing performance test method for a heavy-duty planetary threaded roller bearing belong to the technical field of mechanical foundation part test. The invention solves the problem that the existing testing device for the standard bearing is not suitable for testing the static limit load and the limit dynamic load of the heavy-load planetary threaded roller bearing. Including base, loading device, three roof beam four post structures, installation frock, actuating system and observing and controlling system, exert axial force to being surveyed planet screw thread roller bearing through loading device, actuating system sets up in one side of the fixed roof beam of second and the tip rigid coupling of its output and step shaft, shows and takes notes static load and the dynamic load that is born by being surveyed planet screw thread roller bearing in real time through observing and controlling system. The method and the device can realize the limit static load and limit dynamic load life tests of the planetary threaded roller bearings of various sizes and models under the heavy-load working condition. The testing device has reasonable structure and stable operation, can realize automatic control, and has good universality and measurement accuracy.
Description
Technical Field
The invention relates to a device and a method for testing the axial bearing performance of a heavy-duty planetary threaded roller bearing, and belongs to the technical field of mechanical foundation part testing.
Background
The planetary thread roller bearing is composed of a retainer, a bearing outer ring with annular threads, a bearing inner ring and rollers, and the thread rollers are used as rolling bodies instead of balls. The structure of the planetary threaded roller bearing is similar to that of a planetary roller screw, the planetary threaded roller bearing and the planetary threaded roller screw both transmit load through threaded rollers, and the contact modes between the threaded teeth are point contact. Compared with a ball bearing, the planetary threaded roller bearing has the same contact mode, the contact radius of the contact area can be designed under the same external dimension, and the number of contact points in the axial direction is larger, so that the planetary threaded roller bearing can provide larger static limit load and rated dynamic load. Compared with the common roller bearing, the single planetary threaded roller bearing can bear bidirectional axial and radial loads at the same time, and a bearing set form is not required in practical application. The planetary thread roller bearing has the characteristics of high power-to-volume ratio, large bearing capacity, high rigidity and the like, can be used as a support bearing of heavy-load linear actuation equipment, and is applied to weapon equipment such as missile launcher erecting and leveling devices, fighter undercarriages, large-scale numerical control machines and the like and industrial production equipment.
At present, the development of the planetary threaded roller bearing is still in a starting stage, and related researches such as product development, design method, performance analysis and test are almost blank. The manufacturers at home and abroad do not put forward a series of mature products of the planetary threaded roller bearing, and the test equipment and the evaluation method are not disclosed. However, at present, research institutions and manufacturers at home and abroad have mature schemes for testing equipment and methods of standard bearings, but most of the testing devices transmit input loads to a rack base, so that the load size is limited.
The static limit load and the limit dynamic load life of the heavy-duty planetary threaded roller bearing are the crucial service performance indexes for evaluating the application of the heavy-duty planetary threaded roller bearing in the field of equipment. In order to promote the development of performance evaluation research of heavy-duty planetary threaded roller bearing products, the invention provides a device and a method for testing the axial bearing performance of a heavy-duty planetary threaded roller bearing, which can realize the static limit load and limit dynamic load life test of heavy-duty planetary threaded roller bearings of various sizes and models and provide a reference scheme for the performance test and evaluation of the heavy-duty planetary threaded roller bearing.
Disclosure of Invention
The invention aims to solve the technical problems and further provides a device and a method for testing the axial bearing performance of a heavy-duty planetary threaded roller bearing.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the axial bearing performance test device of the heavy-duty planetary threaded roller bearing comprises a base, a loading device, a three-beam four-column structure, an installation tool, a driving system and a measurement and control system, wherein the three-beam four-column structure comprises a first fixed beam, a second fixed beam, a sliding beam and four guide bearing columns, the first fixed beam, the second fixed beam and the sliding beam are parallel to each other and are vertically arranged, the four guide bearing columns are parallel to each other and are horizontally arranged, the first fixed beam and the second fixed beam are fixedly arranged on the base, the sliding beam is positioned between the first fixed beam and the second fixed beam and is sleeved on the four guide bearing columns in a sliding mode, and two end portions of the four guide bearing columns are fixedly connected with the first fixed beam and the second fixed beam correspondingly;
the mounting tool comprises a loading bearing seat, a stepped shaft and a bearing adapter seat, wherein the loading bearing seat is fixedly arranged on one side of the sliding beam and is provided with a tapered roller bearing;
the loading device is fixedly arranged on the first fixed beam, the output end of the loading device is fixedly connected with the sliding beam, axial force is applied to the tested planetary threaded roller bearing through the loading device, the driving system is arranged on one side of the second fixed beam, the output end of the driving system is fixedly connected with the end part of the stepped shaft, and the static load and the dynamic load born by the tested planetary threaded roller bearing are displayed and recorded in real time through the measurement and control system.
Furthermore, the measurement and control system comprises a control cabinet, a tension and pressure sensor fixedly arranged between the sliding beam and the loading bearing seat and a torque and rotation speed sensor fixedly arranged between the stepped shaft and the output end of the driving system, wherein the tension and pressure sensor and the torque and rotation speed sensor are electrically connected with the control cabinet.
Furthermore, the measurement and control system further comprises a laser displacement sensor, and the laser displacement sensor is fixed on the second fixed beam.
Further, the driving system comprises a driving motor, a planetary reducer arranged on an output shaft of the driving motor and a coupling for connecting the torque and speed sensor and the planetary reducer.
Furthermore, two end parts of each guiding bearing column are correspondingly arranged on the first fixed beam and the second fixed beam in a penetrating mode, and the fixed connection between the guiding bearing columns and the fixed beams is achieved through adjusting nuts arranged on two sides of each fixed beam.
Furthermore, the loading bearing seat is fixedly connected with the pull pressure sensor through a connecting flange.
Further, the loading device is a hydraulic loading device.
Furthermore, the loading device comprises a hydraulic cylinder and a hydraulic pump station, and the hydraulic pump station controls the telescopic action of a piston rod of the hydraulic cylinder.
A test method adopting the test device comprises the following steps:
step one, mounting a tested planetary threaded roller bearing;
step two, applying axial static load to the tested planetary threaded roller bearing, and carrying out limit static load test;
step three, after the maximum static load test is finished, the tested planetary threaded roller bearing is dismounted, and whether the interior of the tested planetary threaded roller bearing is crushed or not is checked;
step four, the tested planetary threaded roller bearing and the matched bearing are not crushed after the static load test is finished, the tested planetary threaded roller bearing is installed again, and the life test of the extreme dynamic load is continued;
step five, starting a driving system, driving the stepped shaft to rotate so as to drive the tested planetary threaded roller bearing to rotate, applying a constant load to the tested planetary threaded roller bearing, keeping the tested planetary threaded roller bearing at a constant rotating speed, and carrying out a limit dynamic load service life test;
step six, after completing the dynamic load life test, dismounting the tested planetary threaded roller bearing and checking the planetary threaded roller bearing; checking whether the components of the tested planetary threaded roller bearing are loosened, dislocated, fallen off and deformed beyond the requirement; disassembling and cleaning the bearing, checking the abrasion degree of the thread part, and judging whether the contact area of the threads of the tested planetary threaded roller bearing is in fatigue failure or not; if the tested planetary threaded roller bearing does not fail, repeating the dynamic load service life test in the step five until the tested planetary threaded roller bearing fails;
step seven, obtaining test parameters:
the test parameters comprise the maximum value of the loading force measured by a pull pressure sensor in a static load test, the axial deformation of the inner ring of the tested planetary threaded roller bearing under the action of different axial loads respectively measured by a laser displacement sensor, the static rigidity of the planetary threaded roller bearing obtained by calculation, the torque rotating speed output by a planetary reducer measured by a torque rotating speed sensor, the axial loading force measured by the pull pressure sensor and the temperature of the end face of the outer ring of the tested planetary threaded roller bearing measured during the test.
Further, the axial static load applied in the second step is increased to 1800kN in increments of 50kN from 500kN in a stepping mode, and the constant load is kept for 10s after the load is increased each time; and fifthly, controlling the axial thrust output by the loading device to be constant at 1500kN, and stopping the test after the tested planetary threaded roller bearing rotates for 2000min under the action of the axial load.
Compared with the prior art, the invention has the following effects:
the three-beam four-column structure is arranged in the middle of the testing device as a bearing mechanism, the four guiding bearing columns and the two fixed beams are connected into an integrally closed frame structure, so that the axial tension and pressure of the test are borne in the closed frame, the strength and rigidity of the integral structure are ensured, the three-beam four-column structure is safer and more reliable, the design principle is reasonable, the structure is simple, and the installation and debugging are convenient.
The bearing adapter seat can be selected or redesigned according to tested planetary threaded roller bearings of different sizes, and when the planetary threaded roller bearings of other sizes and models are tested, only the bearing adapter seat needs to be replaced, so that the generalization degree can be improved, the test cost is saved, the test range of the test device is greatly expanded, and the utilization rate of the test device is improved.
The method and the device can realize the limit static load and limit dynamic load life tests of the planetary threaded roller bearings of various sizes and models under the heavy-load working condition. The testing device has reasonable structure and stable operation, can realize automatic control, and has good universality and measurement accuracy.
Drawings
FIG. 1 is a schematic perspective view of a device for testing the bearing performance of a heavy-duty planetary threaded roller bearing;
FIG. 2 is a main cross-sectional schematic view of a loading bearing seat;
FIG. 3 is a schematic perspective view of a bearing adapter;
FIG. 4 is a perspective view of a second fixed beam;
FIG. 5 is a perspective view of a sliding beam;
FIG. 6 is a perspective view of a stepped shaft;
FIG. 7 is a flow chart of the life test of the ultimate static load and the ultimate dynamic load of the tested planetary threaded roller bearing.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 7, and the axial bearing performance test device for the heavy-duty planetary threaded roller bearing comprises a base 16, a loading device, a three-beam four-column structure, an installation tool, a driving system and a measurement and control system, wherein the three-beam four-column structure comprises a first fixed beam 4, a second fixed beam 12, a sliding beam 8 and four guide bearing columns 7 which are parallel to each other, are vertically arranged, are horizontally arranged, the first fixed beam 4 and the second fixed beam 12 are fixedly arranged on the base 16, the sliding beam 8 is positioned between the first fixed beam 4 and the second fixed beam 12 and is slidably sleeved on the four guide bearing columns 7, and two end parts of the four guide bearing columns 7 are fixedly connected with the first fixed beam 4 and the second fixed beam 12 correspondingly;
the mounting tool comprises a loading bearing seat 10, a stepped shaft 18 and a bearing adapter seat 20, wherein the loading bearing seat 10 is fixedly arranged on one side of the sliding beam 8 and is provided with a tapered roller bearing 23, the bearing adapter seat 20 is fixedly arranged on the second fixed beam 12, the tested planetary threaded roller bearing 11 is arranged on the bearing adapter seat 20, and two end parts of the stepped shaft 18 are respectively arranged in the tapered roller bearing 23 and the tested planetary threaded roller bearing 11;
the loading device is fixedly arranged on the first fixed beam 4, the output end of the loading device is fixedly connected with the sliding beam 8, axial force is applied to the tested planetary threaded roller bearing 11 through the loading device, the driving system is arranged on one side of the second fixed beam 12, the output end of the driving system is fixedly connected with the end part of the stepped shaft 18, and the static load and the dynamic load born by the tested planetary threaded roller bearing 11 are displayed and recorded in real time through the measurement and control system.
The stepped shaft 18 drives the inner ring of the tested planetary threaded roller bearing 11 matched with the stepped shaft 18 to rotate by applying a torsional force to the stepped shaft 18 through a driving system.
And a bearing transparent cover 24 is arranged at one end of the loading bearing seat 10 close to the second fixed beam, so that the stepped shaft passes through a hole in the middle of the bearing transparent cover, is matched with the inner ring of the bearing and can be used for axially positioning and fixing the outer ring of the bearing.
When the loading device adopts a hydraulic cylinder, the first fixed beam fixes and supports the hydraulic cylinder, the sliding beam guides and supports the piston rod, and the second fixed beam fixes and supports the tested planetary threaded roller bearing.
The three-beam four-column structure is arranged in the middle of the testing device as a bearing mechanism, the four guiding bearing columns 7 are connected with the two fixed beams to form an integrally closed frame structure, the axial tension and pressure of the test are borne in the closed frame, the strength and rigidity of the overall structure are guaranteed, the testing device is more reasonable in stress, stable in operation, small in system error, safer and more reliable, reasonable in design principle, simple in structure and convenient to install and debug.
The bearing adapter seat 20 can be selected or redesigned according to tested planetary threaded roller bearings 11 of different sizes, and when testing planetary threaded roller bearings of other sizes and models, only the bearing adapter seat 20 needs to be replaced, so that the generalization degree can be improved, the test cost is saved, the test range of the test device is greatly expanded, and the utilization rate of the test device is improved.
The measurement and control system is provided with two control modes, namely manual control and automatic control, and is convenient to switch and simple to operate. The data measured by the sensor can be displayed in real time, all data during the test can be recorded, the test workload is greatly reduced, and the labor cost is saved.
The method and the device can realize the limit static load and limit dynamic load life tests of the planetary threaded roller bearings of various sizes and models under the heavy-load working condition. The testing device has reasonable structure and stable operation, can realize automatic control, and has good universality and measurement accuracy.
The axial force output by the loading device is transmitted to the stepped shaft 18 through the sliding beam 8 and the loading bearing seat 10, and finally acts on the tested planetary threaded roller bearing 11.
The measurement and control system comprises a control cabinet 22, a tension and pressure sensor 9 fixedly arranged between the sliding beam 8 and the loading bearing seat 10 and a torque and rotation speed sensor 21 fixedly arranged between the stepped shaft 18 and the output end of the driving system, wherein the tension and pressure sensor 9 and the torque and rotation speed sensor 21 are electrically connected with the control cabinet 22. By means of the design, the output thrust of the hydraulic cylinder is measured through the tension pressure sensor 9. The torque and the rotational speed output through the planetary reduction gear are measured by the torque/rotational speed sensor 21, whereby the axial load borne by the planetary threaded roller bearing and the torque/rotational speed on the stepped shaft 18 can be obtained.
The measurement and control system further comprises a laser displacement sensor 19, and the laser displacement sensor 19 is fixed on the second fixed beam 12. And respectively testing the axial deformation of the inner ring of the tested planetary threaded roller bearing 11 under the action of different axial loads by using the laser displacement sensor 19, and calculating the static rigidity of the tested planetary threaded roller bearing 11.
The driving system comprises a driving motor 15, a planetary reducer 14 arranged on an output shaft of the driving motor 15 and a coupling 13 connecting a torque and rotating speed sensor 21 and the planetary reducer 14. After the power output by the driving motor 15 is decelerated and torque-increased by the planetary reducer 14, the power is input to the end part of the tested stepped shaft 18 through the coupler 13 and the torque and rotation speed sensor 21, so that the power and the tested planetary threaded roller bearing 11 rotate together to complete the test.
Two ends of each guiding bearing column 7 are correspondingly arranged on the first fixed beam 4 and the second fixed beam 12 in a penetrating way, and the fixed connection between the guiding bearing columns and the fixed beams is realized through adjusting nuts 3 arranged on two sides of each fixed beam. Through setting up adjusting nut 3, when realizing the fixed connection between direction bearing post 7 and the fixed beam, adjust the depth of parallelism of four direction bearing posts 7 and the straightness that hangs down of four direction bearing posts 7 and every fixed beam, guaranteed that slide beam 8 is with higher precision axial displacement along direction bearing post 7.
The loading bearing seat 10 is fixedly connected with the pull pressure sensor 9 through a connecting flange 17. Specifically, one end of the connecting flange 17 is fixedly connected with a central hole of the tension and pressure sensor 9.
The loading device is a hydraulic loading device. By the design, the axial load adjusting range is large, the output oil pressure is accurately adjusted through the servo motor, and the applied load can be gradually increased from an initial value to a maximum value according to a settable interval.
The loading device comprises a hydraulic cylinder 2 and a hydraulic pump station 1, and the hydraulic pump station 1 controls the telescopic action of a piston rod 6 of the hydraulic cylinder 2. The hydraulic pump station 1 drives the hydraulic pump to control the pressure of oil in the hydraulic cylinder 2 through the servo motor, and the control valve group is used for changing the liquid flow direction, so that the piston rod 6 is extended or retracted. When the tested planetary threaded roller bearing 11 is installed, the tested planetary threaded roller bearing 11 is convenient to assemble and disassemble through the extending or retracting action of the piston rod 6 of the hydraulic cylinder 2.
A test method adopting the test device comprises the following steps:
step one, installing a tested planetary threaded roller bearing 11; the specific process is as follows: firstly, controlling the sliding beam 8 to move through a loading device, reserving enough installation space between the sliding beam 8 and the second fixed beam 12, installing a driving system (specifically a coupler and a torque and rotating speed sensor in the driving system), and then assembling a bearing adapter 20 at a corresponding position on the second fixed beam 12; fixing the tested planetary threaded roller bearing 11 on the bearing adapter 20, placing the stepped shaft 18 between the loading bearing seat 10 and the tested planetary threaded roller bearing 11, and controlling the sliding beam 8 to move through the loading device again to enable the stepped shaft 18 to be tightly matched with the loading bearing seat 10 and the tested planetary threaded roller bearing 11; then, all the mounting bolts are tightened with a predetermined torque, and the planetary threaded roller bearing 11 to be tested is mounted.
Step two, applying axial static load to the tested planetary threaded roller bearing 11, and carrying out limit static load test; the specific process is as follows: the driving system keeps a locked state, so that the stepped shaft 18 and the tested planetary threaded roller bearing 11 keep static, the loading device is started, the loading device applies axial load to the tested planetary threaded roller bearing 11 through the sliding beam 8 and the stepped shaft 18, the applied load is increased to 1800kN step by step from 500kN by taking 50kN as increment, and the constant load is kept for 10s after the load is increased each time; and respectively testing the axial deformation of the inner ring of the tested planetary threaded roller bearing 11 under the action of different axial loads by using the laser displacement sensor 19, and calculating the static rigidity of the tested planetary threaded roller bearing 11.
Step three, after the maximum static load test is finished, the tested planetary threaded roller bearing 11 is dismounted, and whether the interior of the tested planetary threaded roller bearing is crushed or not is checked; when the tested planetary threaded roller bearing 11 is disassembled, the driving system is firstly closed, the sliding beam 8 is controlled to move through the loading device, the distance between the sliding beam 8 and the second fixed beam 12 is ensured, the loading device is closed, the stepped shaft 18 is disassembled, and then the tested planetary threaded roller bearing 11 is disassembled.
Step four, the tested planetary threaded roller bearing 11 and the matched bearing are not crushed after the static load test is finished, the tested planetary threaded roller bearing 11 is installed again, and the life test of the limit dynamic load is continued;
step five, starting a driving system, driving the stepped shaft 18 to rotate so as to drive the tested planetary threaded roller bearing 11 to rotate, applying a constant load to the tested planetary threaded roller bearing 11, keeping the constant rotating speed of the tested planetary threaded roller bearing 11, and carrying out a limit dynamic load service life test; the specific process is as follows: unlocking the driving system, and driving the stepped shaft 18 through the driving system to accelerate the speed of the stepped shaft to 50rpm after 10 seconds; controlling the axial thrust output by the loading device by using a pull pressure sensor 9 to ensure that the thrust is constant at 1500 kN; when the tested planetary threaded roller bearing 11 rotates for 2000min under the action of the axial load, the test is stopped; data recorded during the experiment run included: the input torque and the rotation speed, the axial pressure output by the loading device and the temperature of the end surface of the outer ring of the tested planetary threaded roller bearing 11.
Step six, after completing the dynamic load life test, dismounting the tested planetary threaded roller bearing 11 and checking the planetary threaded roller bearing; checking whether the components of the tested planetary threaded roller bearing 11 are loosened, dislocated, fallen off and deformed beyond the requirement; disassembling and cleaning the planetary threaded roller bearing, checking the abrasion degree of the threaded part, and judging whether the threaded contact area of the tested planetary threaded roller bearing 11 is in failure due to fatigue damage; if the tested planetary threaded roller bearing 11 does not fail, repeating the dynamic load life test in the step five until the tested planetary threaded roller bearing 11 fails;
step seven, obtaining test parameters:
the test parameters comprise the maximum value of the loading force measured by the tension and pressure sensor 9 in the static load test, the axial deformation of the inner ring of the tested planetary threaded roller bearing 11 under the action of different axial loads respectively measured by the laser displacement sensor 19, the static rigidity of the planetary threaded roller bearing obtained by calculation, the torque rotating speed output by the planetary reducer 14 measured by the torque rotating speed sensor 21, the axial loading force measured by the tension and pressure sensor 9 and the temperature of the end face of the outer ring of the tested planetary threaded roller bearing 11 measured in the test. The parameters can be continuously recorded during the test through the data recording function of the control console, and all data can be derived for processing after the test is completed.
If the planet thread roller bearing is crushed during the static load test, the static bearing performance of the planet thread roller bearing is not up to the standard, and the contact area is damaged, so that the dynamic load test cannot be carried out, and the test fails.
The testing method is suitable for testing the axial bearing performance of heavy-duty planetary threaded roller bearings of various sizes and models.
Claims (10)
1. Heavy load planet screw thread roller bearing axial load-carrying capability test device, its characterized in that: the device comprises a base (16), a loading device, a three-beam four-column structure, an installation tool, a driving system and a measurement and control system, wherein the three-beam four-column structure comprises a first fixed beam (4), a second fixed beam (12), a sliding beam (8) and four guiding bearing columns (7) which are parallel to each other and are all vertically arranged, the first fixed beam (4) and the second fixed beam (12) are all fixedly arranged on the base (16), the sliding beam (8) is positioned between the first fixed beam (4) and the second fixed beam (12) and is slidably sleeved on the four guiding bearing columns (7), and two end parts of the four guiding bearing columns (7) are correspondingly fixedly connected with the first fixed beam (4) and the second fixed beam (12);
the mounting tool comprises a loading bearing seat (10), a stepped shaft (18) and a bearing adapter seat (20), wherein the loading bearing seat (10) is fixedly arranged on one side of the sliding beam (8) and is provided with a tapered roller bearing (23), the bearing adapter seat (20) is fixedly arranged on the second fixed beam (12), a tested planetary threaded roller bearing (11) is arranged on the bearing adapter seat (20), and two end parts of the stepped shaft (18) are respectively arranged in the tapered roller bearing (23) and the tested planetary threaded roller bearing (11);
the loading device is fixedly arranged on the first fixed beam (4), the output end of the loading device is fixedly connected with the sliding beam (8), axial force is applied to the tested planetary threaded roller bearing (11) through the loading device, the driving system is arranged on one side of the second fixed beam (12), the output end of the driving system is fixedly connected with the end portion of the stepped shaft (18), and static load and dynamic load born by the tested planetary threaded roller bearing (11) are displayed and recorded in real time through the measurement and control system.
2. The axial load bearing performance test device of a heavy-duty planetary threaded roller bearing according to claim 1, characterized in that: the measurement and control system comprises a control cabinet (22), a tension and pressure sensor (9) fixedly arranged between the sliding beam (8) and the loading bearing seat (10) and a torque and rotation speed sensor (21) fixedly arranged between the stepped shaft (18) and the output end of the driving system, wherein the tension and pressure sensor (9) and the torque and rotation speed sensor (21) are electrically connected with the control cabinet (22).
3. The axial load-carrying capability test device of a heavy-duty planetary threaded roller bearing according to claim 2, characterized in that: the measurement and control system further comprises a laser displacement sensor (19), and the laser displacement sensor (19) is fixed on the second fixing beam (12).
4. The axial load-carrying capability test device of a heavy-duty planetary threaded roller bearing according to claim 2, characterized in that: the driving system comprises a driving motor (15), a planetary reducer (14) arranged on an output shaft of the driving motor (15) and a coupling (13) connected with a torque and speed sensor (21) and the planetary reducer (14).
5. The axial load bearing performance test device of a heavy-duty planetary threaded roller bearing according to claim 1, characterized in that: two end parts of each guiding bearing column (7) are correspondingly arranged on the first fixed beam (4) and the second fixed beam (12) in a penetrating way, and the fixed connection between the guiding bearing columns and the fixed beams is realized through adjusting nuts (3) arranged on two sides of each fixed beam.
6. The axial load-carrying capability test device of a heavy-duty planetary threaded roller bearing according to claim 2, characterized in that: the loading bearing seat (10) is fixedly connected with the tension pressure sensor (9) through a connecting flange (17).
7. The axial load bearing performance test device of a heavy-duty planetary threaded roller bearing according to claim 1, characterized in that: the loading device is a hydraulic loading device.
8. The axial load bearing performance test device of a heavy-duty planetary threaded roller bearing according to claim 1, characterized in that: the loading device comprises a hydraulic cylinder (2) and a hydraulic pump station (1), and the hydraulic pump station (1) controls the telescopic action of a piston rod (6) of the hydraulic cylinder (2).
9. A test method using the test apparatus according to any one of claims 1 to 8, characterized in that: it comprises the following steps:
step one, mounting a tested planetary threaded roller bearing (11);
step two, applying axial static load to the tested planetary threaded roller bearing (11) and carrying out limit static load test;
step three, after the maximum static load test is finished, the tested planetary threaded roller bearing (11) is dismounted, and whether the interior of the tested planetary threaded roller bearing is crushed or not is checked;
step four, the tested planetary threaded roller bearing (11) and the matched bearing are not crushed after the static load test is finished, the tested planetary threaded roller bearing (11) is installed again, and the service life test of the limit dynamic load is continued;
step five, starting a driving system, driving the stepped shaft (18) to rotate so as to drive the tested planetary threaded roller bearing (11) to rotate, applying a constant load to the tested planetary threaded roller bearing (11), keeping the constant rotating speed of the tested planetary threaded roller bearing, and testing the service life of the extreme dynamic load;
step six, after completing the dynamic load life test, dismounting the tested planetary threaded roller bearing (11) and checking the planetary threaded roller bearing; checking whether the components of the tested planetary threaded roller bearing (11) are loosened, dislocated, fallen off and deformed beyond the requirement; disassembling and cleaning the bearing, checking the abrasion degree of the thread part, and judging whether the thread contact area of the tested planetary threaded roller bearing (11) is in fatigue failure or not to cause failure; if the tested planetary threaded roller bearing (11) does not fail, repeating the dynamic load life test in the step five until the tested planetary threaded roller bearing (11) fails;
step seven, obtaining test parameters:
the test parameters comprise the maximum value of the loading force measured by the tension and pressure sensor (9) in the static load test, the axial deformation of the inner ring of the tested planetary threaded roller bearing (11) under the action of different axial loads respectively measured by the laser displacement sensor (19), the static rigidity of the planetary threaded roller bearing obtained by calculation, the torque and rotating speed output by the planetary reducer (14) measured by the torque and rotating speed sensor (21), the axial loading force measured by the tension and pressure sensor (9), and the temperature of the end face of the outer ring of the tested planetary threaded roller bearing (11) measured during the test.
10. The test method according to claim 9, characterized in that: increasing the axial static load applied in the second step from 500kN to 1800kN in a stepping mode by taking 50kN as increment, and keeping the constant load for 10s after the load is increased each time; and fifthly, controlling the axial thrust output by the loading device to be constant at 1500kN, and stopping the test after the tested planetary threaded roller bearing (11) rotates for 2000min under the action of the axial load.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116026587A (en) * | 2023-03-29 | 2023-04-28 | 湖南中大创远数控装备有限公司 | Detection device for ultimate bearing strength of bearing set |
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| CN106482627A (en) * | 2016-09-22 | 2017-03-08 | 大连理工大学 | A kind of testing stand for measuring bearing Radial windage and method |
| CN107271180A (en) * | 2017-06-18 | 2017-10-20 | 南京理工大学 | A kind of planetary roller screw integrates load testing machine |
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| CN110426200A (en) * | 2019-09-10 | 2019-11-08 | 哈工大机器人（山东）智能装备研究院 | Heavily loaded planetary roller screw pair comprehensive performance measuring device and measuring method |
| CN111238811A (en) * | 2020-01-17 | 2020-06-05 | 人本集团有限公司 | Detection device for detecting radial bearing capacity of roller bearing |
| CN111307456A (en) * | 2020-03-06 | 2020-06-19 | 人本集团有限公司 | Detection device for detecting axial bearing capacity of roller bearing |
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| CN116026587A (en) * | 2023-03-29 | 2023-04-28 | 湖南中大创远数控装备有限公司 | Detection device for ultimate bearing strength of bearing set |
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