Tapered roller bearing raceway surface indentation testing method

Abstract

The invention discloses a tapered roller bearing raceway surface indentation testing method. An adopted testing device comprises a connecting seat, a shell, a lower bearing seat, an upper bearing seat, a main shaft, two bearings to be tested, a dismounting sleeve, a cover plate and a pressure sensor. The test method comprises the following steps: checking and recording appearance and performance data of a bearing to be tested; the two bearings to be tested are installed in the testing device; adding a proper amount of lubricating oil and pollutants into the test cavity; mounting the testing device on a drilling machine; starting a drilling machine to drive the inner rings of the two bearings to be measured to rotate; axial force is applied to the two bearings to be tested, the magnitude of the applied axial force is controlled through a pressure sensor, and the required axial force and the test time are applied according to the test requirements; after the test is completed, the two bearings to be tested are cleaned up; comparing the appearance and performance data of the two to-be-tested bearings before and after testing, and judging the damage condition of the raceway surfaces of the two to-be-tested bearings. According to the invention, the wear resistance of the bearing raceway can be detected.

Description

Technical Field

[0001] The invention relates to a method for testing indentations on the raceway surface of a tapered roller bearing. Background Art

[0002] Tapered roller bearings are widely used bearings. In order to increase the service life of bearings, continuous optimization and improvement have been made in the design and manufacturing process of bearings. The service life of bearings is also increasing. At present, the conventional method for detecting the service life of bearings is to conduct a bench test of the service life of bearings. This test method is to test the service life of bearings under ideal conditions, which is very different from the actual use of some bearings. It is difficult to accurately reflect the wear and failure of bearings in actual use. In the presence of contaminants, the surface of the bearing raceway will produce depressions and wear, which will reduce the service life of the bearing. The wear resistance of the bearing raceway surface reflects the service life of the bearing to a certain extent. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for testing the indentation on the raceway surface of a tapered roller bearing, which can judge the service life and the quality of design and manufacturing of the bearing from different angles.

[0004] The object of the present invention is achieved as follows: a test method for the indentation on the raceway surface of a tapered roller bearing, a test device based on the indentation on the raceway surface of a tapered roller bearing, the test device comprising a connecting seat, a housing, a lower bearing seat, an upper bearing seat, a main shaft, two bearings to be tested, a disassembly sleeve, a cover plate and a pressure sensor; wherein,

[0005] The connection seat has a threaded through hole in the center, and a plurality of threaded blind holes are evenly distributed on the top surface of the outer periphery of the threaded through hole; a groove is provided in the center of the bottom surface of the connection seat;

[0006] The housing comprises a mounting base plate and a sleeve integrally connected to the top surface of the mounting base plate; a rectangular through hole coaxial with the threaded through hole on the connecting seat is provided at the center of the mounting base plate, and a plurality of mounting holes are evenly arranged on the periphery of the through hole, so that the housing is mounted on the top surface of the connecting seat by a plurality of screws; a plurality of threaded blind holes are evenly arranged on the top surface of the sleeve; the lower bearing seat is coaxially mounted on the lower part of the sleeve of the housing, and the lower bearing seat is a barrel body with a base plate;

[0007] The upper bearing seat is coaxially mounted in the sleeve of the housing and is located above the lower bearing seat, and the upper bearing seat is a cylinder with a top ring plate;

[0008] The spindle is coaxially mounted in a test cavity formed by the inner cavity of the lower bearing seat and the inner cavity of the upper bearing seat, and the upper end of the spindle is connected to the spindle of the drilling machine;

[0009] The two bearings to be tested are both sleeved on the lower part of the main shaft;

[0010] The disassembly sleeve is installed in the test cavity and is installed on the main shaft through a key and is located between the two bearings to be tested, so that the two bearings to be tested are installed on the bottom of the inner cavity of the lower bearing seat and the top of the inner cavity of the upper bearing seat in a one-to-one correspondence;

[0011] The cover plate is provided with a plurality of countersunk holes corresponding to the plurality of threaded blind holes on the top surface of the shell, so that the cover plate is mounted on the top surface of the shell by a plurality of screws;

[0012] The pressure sensor is installed in the through hole of the housing, and an axial abutment bolt installed in the threaded through hole of the connecting seat is provided at the bottom of the pressure sensor;

[0013] The method for testing the indentation on the raceway surface of a tapered roller bearing of the present invention comprises the following steps:

[0014] S1. Check and record the appearance, roughness, rotation accuracy and vibration speed of the bearing raceway surface to be tested; clean the spindle, disassembly sleeve, key, two bearings to be tested, upper bearing seat, lower bearing seat and cover plate, and check the appearance and dimensional accuracy of each part;

[0015] S2. Install the inner components, disassembly sleeves and keys of the two bearings to be tested onto the main shaft;

[0016] S3, installing the outer rings of the two bearings to be tested to the bottom of the inner cavity of the lower bearing seat and the top of the inner cavity of the upper bearing seat in a one-to-one correspondence;

[0017] S4, first install the lower bearing seat into the lower part of the sleeve of the housing, then install the components installed in step S2 into the lower bearing seat, and then install the upper bearing seat into the upper part of the sleeve of the housing;

[0018] S5. First, add lubricating oil and pollutants containing silicon carbide particles and cemented carbide particles into the test cavity, and then install the cover plate;

[0019] S6. First, fasten the connection seat and the workbench of the drilling machine with bolts, then fasten the pressure sensor to the housing and the connection seat with axial abutment bolts, and then connect the main shaft to the main shaft of the drilling machine with a coupling;

[0020] S7, start the drilling machine, and drive the inner rings of the two bearings to be tested to rotate through the main shaft; after the main shaft rotates for 3 to 5 minutes, apply axial force to the two bearings to be tested by rotating the axial push bolts, and control the axial force applied by the axial push bolts through the pressure sensor, and apply the required axial force and test time according to the test requirements;

[0021] S8. After the test is completed, remove the two bearings to be tested and clean them;

[0022] S9. Compare the appearance, roughness, rotation accuracy of the finished bearings and vibration speed data of the two bearing raceway surfaces before and after the test to determine the damage of the two bearing raceway surfaces. The closer the data after the test is to the data before the test, the stronger the ability of the bearing raceway surface to resist wear, thereby detecting the wear resistance of the bearing raceway.

[0023] In the above-mentioned method for testing the indentation on the raceway surface of a tapered roller bearing, a wiring groove connected to the through hole is radially opened on the bottom surface of the mounting base plate of the housing.

[0024] In the above-mentioned method for testing the indentation on the raceway surface of a tapered roller bearing, a plurality of temperature sensors are installed on the side wall of the sleeve; when performing the step S7, the temperature rise of the two bearings to be tested is recorded by the plurality of temperature sensors.

[0025] The test method for the indentation on the surface of the tapered roller bearing raceway of the present invention is characterized in that the bearing can be placed in a polluted environment for destructive testing to damage the appearance of the bearing raceway surface. By comparing the appearance, roughness, bearing rotation accuracy, bearing vibration speed and other data of the bearing raceway before and after the test, the damage to the bearing raceway surface can be determined, thereby detecting the wear resistance of the bearing raceway. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an axial cross-sectional view of a testing device for the indentation on the raceway surface of a tapered roller bearing used in the present invention;

[0027] Figure 2 is an axial cross-sectional view of a housing in a test device used in the present invention;

[0028] Figure 3 It is an axial cross-sectional view of the component formed after the test method of the present invention completes step S2 of the test. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] See also Figures 1 to 3 The present invention provides a method for testing the surface indentation of a tapered roller bearing raceway, and a device for testing the surface indentation of a tapered roller bearing raceway. The device comprises a connecting seat 1, a housing 2, a lower bearing seat 3, an upper bearing seat 4, a main shaft 5, two bearings to be tested 6, a disassembly sleeve 7, a cover plate 8 and a pressure sensor 9A; wherein,

[0031] A threaded through hole is provided in the center of the connection seat 1, and a plurality of threaded blind holes are evenly distributed on the top surface of the periphery of the threaded through hole; a groove is provided in the center of the bottom surface of the connection seat 1;

[0032] The outer shell 2 includes a mounting base plate 21 and a sleeve 22 integrally connected to the top surface of the mounting base plate 21; a rectangular through hole 20 coaxial with the threaded through hole on the connecting seat 1 is provided at the center of the mounting base plate 21, and a plurality of mounting holes are evenly distributed on the periphery of the through hole 20, so that the outer shell 2 is mounted on the top surface of the connecting seat 1 by means of a plurality of screws, and a wiring groove 210 connected to the through hole 20 is radially provided on the bottom surface of the mounting base plate 21; a plurality of threaded blind holes are evenly distributed on the top surface of the sleeve 22; and three temperature sensors 9B are installed on the side wall of the sleeve 2.

[0033] The lower bearing seat 3 is coaxially mounted at the lower part of the sleeve 22 of the housing 2, and the lower bearing seat 3 is a barrel having a bottom plate;

[0034] The upper bearing seat 4 is coaxially mounted in the sleeve 22 of the housing 2 and is located above the lower bearing seat 3. The upper bearing seat 4 is a cylinder with a top ring plate.

[0035] The main shaft 5 is coaxially installed in the test cavity formed by the inner cavity of the lower bearing seat 3 and the inner cavity of the upper bearing seat 4. The upper end of the main shaft 5 is connected to the driving mechanism; the driving mechanism is a drilling machine;

[0036] The two bearings 6 to be tested are both sleeved on the lower part of the main shaft 5;

[0037] The disassembly sleeve 7 is installed in the test cavity and is installed on the main shaft 5 through the key 70 and is located between the two bearings 6 to be tested, so that the two bearings 6 to be tested are installed one by one at the bottom of the inner cavity of the lower bearing seat 3 and the top of the inner cavity of the upper bearing seat 4;

[0038] The cover plate 8 is provided with a plurality of countersunk holes corresponding to the plurality of threaded blind holes on the top surface of the housing 2, so that the cover plate 8 is mounted on the top surface of the housing 2 by a plurality of screws; an oil filling hole 80 may also be provided on the cover plate 8 to prevent oil filling after oil leakage in the test cavity;

[0039] The pressure sensor 9A is installed in the through hole 20 of the housing 2 , and an axial abutment bolt 90 installed in the threaded through hole of the connecting seat 1 is provided at the bottom of the pressure sensor 9A.

[0040] The method for testing the indentation on the raceway surface of a tapered roller bearing of the present invention comprises the following steps:

[0041] S1. Check and record the appearance, roughness, rotation accuracy and vibration speed of the raceway surface of the bearing 6 to be tested; clean the main shaft 5, disassembly sleeve 7, key 70, two bearings to be tested 6, upper bearing seat 3, lower bearing seat 4 and cover plate 8, and check the appearance and dimensional accuracy of each part;

[0042] S2, install the inner components 61, disassembly sleeve 7 and key 70 of the two bearings 6 to be tested onto the main shaft 5 (see Figure 3 );

[0043] S3, install the outer rings of the two bearings to be tested 6 to the bottom of the inner cavity of the lower bearing seat 3 and the top of the inner cavity of the upper bearing seat 4 in a one-to-one correspondence;

[0044] S4, first install the lower bearing seat 3 into the lower part of the sleeve 22 of the housing 2, then install the components installed in step S2 into the lower bearing seat 3, and then install the upper bearing seat 4 into the upper part of the sleeve 22 of the housing 2;

[0045] S5. First, add appropriate lubricating oil and pollutants containing silicon carbide particles and cemented carbide particles into the test cavity formed by the lower bearing seat 3 and the upper bearing seat 4, then install the cover plate 8, and connect and fasten the cover plate 8 and the housing 2 with bolts;

[0046] S6. First, the connection base 1 is fastened to the workbench of the drilling machine with bolts, and then the pressure sensor 9 is fastened to the housing 2 and the connection base 1 through the axial abutment bolts 9. The signal line of the pressure sensor 9 is led out through the wiring groove 210 on the connection base 1, and then the main shaft 5 is connected to the main shaft of the drilling machine with the coupling 50;

[0047] S7, start the drilling machine, and drive the inner rings of the two bearings 6 to be tested to rotate through the main shaft 5; after the main shaft 5 rotates for 3 to 5 minutes, apply axial force to the two bearings 6 to be tested by rotating the axial abutting bolts 9, and control the magnitude of the axial force applied by the axial abutting bolts 9 through the pressure sensor 9A, and apply the required axial force and test time according to the test requirements; during the test, the temperature rise of the two bearings 6 to be tested is recorded through three temperature sensors 9B;

[0048] S8. After the test is completed, remove the two bearings 6 to be tested and clean them;

[0049] S9. Compare the appearance, roughness, rotation accuracy of the finished bearings and vibration speed data of the raceway surfaces of the two bearings 6 to be tested before and after the test to determine the damage conditions of the raceway surfaces of the two bearings 6 to be tested. The closer the data after the test is to the data before the test, the stronger the ability of the bearing raceway surface to resist wear, thereby detecting the wear resistance of the bearing raceway.

[0050] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A test method for the indentation on the raceway surface of a tapered roller bearing, and a test device for the indentation on the raceway surface of a tapered roller bearing, the test device comprising a connecting seat, a housing, a lower bearing seat, an upper bearing seat, a main shaft, two bearings to be tested, a disassembly sleeve, a cover plate and a pressure sensor; The connection seat has a threaded through hole in the center, and a plurality of threaded blind holes are evenly distributed on the top surface of the outer periphery of the threaded through hole; a groove is provided in the center of the bottom surface of the connection seat; The housing comprises a mounting base plate and a sleeve integrally connected to the top surface of the mounting base plate; a rectangular through hole coaxial with the threaded through hole on the connecting seat is provided at the center of the mounting base plate, and a plurality of mounting holes are evenly arranged on the periphery of the through hole, so that the housing is mounted on the top surface of the connecting seat by a plurality of screws; a plurality of threaded blind holes are evenly arranged on the top surface of the sleeve; the lower bearing seat is coaxially mounted on the lower part of the sleeve of the housing, and the lower bearing seat is a barrel body with a base plate; The upper bearing seat is coaxially mounted in the sleeve of the housing and is located above the lower bearing seat, and the upper bearing seat is a cylinder with a top ring plate; The spindle is coaxially mounted in a test cavity formed by the inner cavity of the lower bearing seat and the inner cavity of the upper bearing seat, and the upper end of the spindle is connected to the spindle of the drilling machine; The two bearings to be tested are both sleeved on the lower part of the main shaft; The disassembly sleeve is installed in the test cavity and is installed on the main shaft through a key and is located between the two bearings to be tested, so that the two bearings to be tested are installed on the bottom of the inner cavity of the lower bearing seat and the top of the inner cavity of the upper bearing seat in a one-to-one correspondence; The cover plate is provided with a plurality of countersunk holes corresponding to the plurality of threaded blind holes on the top surface of the shell, so that the cover plate is mounted on the top surface of the shell by a plurality of screws; The pressure sensor is installed in the through hole of the housing, and an axial abutment bolt installed in the threaded through hole of the connecting seat is provided at the bottom of the pressure sensor; It is characterized in that The test method comprises the following steps: S1. Check and record the appearance, roughness, rotation accuracy and vibration speed of the bearing raceway surface to be tested; clean the spindle, disassembly sleeve, key, two bearings to be tested, upper bearing seat, lower bearing seat and cover plate, and check the appearance and dimensional accuracy of each part; S2. Install the inner components, disassembly sleeves and keys of the two bearings to be tested onto the main shaft; S3, installing the outer rings of the two bearings to be tested to the bottom of the inner cavity of the lower bearing seat and the top of the inner cavity of the upper bearing seat in a one-to-one correspondence; S4, first install the lower bearing seat into the lower part of the sleeve of the housing, then install the components installed in step S2 into the lower bearing seat, and then install the upper bearing seat into the upper part of the sleeve of the housing; S5. First, add lubricating oil and pollutants containing silicon carbide particles and cemented carbide particles into the test cavity, and then install the cover plate; S6. First, fasten the connection seat and the workbench of the drilling machine with bolts, then fasten the pressure sensor to the housing and the connection seat with axial abutment bolts, and then connect the main shaft to the main shaft of the drilling machine with a coupling; S7, start the drilling machine, and drive the inner rings of the two bearings to be tested to rotate through the main shaft; after the main shaft rotates for 3 to 5 minutes, apply axial force to the two bearings to be tested by rotating the axial push bolts, and control the axial force applied by the axial push bolts through the pressure sensor, and apply the required axial force and test time according to the test requirements; S8. After the test is completed, remove the two bearings to be tested and clean them; S9. Compare the appearance, roughness, rotation accuracy of the finished bearings and vibration speed data of the two bearing raceway surfaces before and after the test to determine the damage of the two bearing raceway surfaces. The closer the data after the test is to the data before the test, the stronger the ability of the bearing raceway surface to resist wear, thereby detecting the wear resistance of the bearing raceway.

2. The method for testing the indentation on the raceway surface of a tapered roller bearing according to claim 1, characterized in that: A wiring groove communicating with the through hole is radially arranged on the bottom surface of the mounting base plate of the housing.

3. The method for testing the indentation on the raceway surface of a tapered roller bearing according to claim 1, characterized in that: A plurality of temperature sensors are installed on the side wall of the sleeve; when performing step S7, the temperature rise of the two bearings to be tested is recorded by the plurality of temperature sensors.

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