Tapered roller bearing raceway surface indentation testing device

Abstract

The utility model discloses a device for testing indentations on the surface of a raceway of a tapered roller bearing. The 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. A threaded through hole is formed in the center of the connecting seat; the shell is mounted on the top surface of the connecting seat; the lower bearing seat is coaxially arranged at the lower part in the sleeve of the shell; the upper bearing seat is coaxially arranged in the sleeve of the shell and is positioned above the lower bearing seat; the main shaft is coaxially arranged in a test cavity formed by the lower bearing seat and the upper bearing seat, and the upper end of the main shaft is connected with the driving mechanism; the two bearings to be measured are sleeved on the lower part of the main shaft; the dismounting sleeve is installed on the main shaft through a key and is located between the two bearings to be tested. The cover plate is mounted on the top surface of the shell; the pressure sensor is installed in the through hole of the shell, and the bottom of the pressure sensor is provided with an axial abutting bolt installed in the threaded penetrating hole of the connecting base. According to the utility model, the wear resistance of the bearing raceway can be detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of testing devices of raceway surface indentation of tapered roller bearing. BACKGROUND

[0002] Tapered roller bearing is a kind of bearing which is widely used. In order to improve the service life of bearing, continuous optimization and improvement are carried out in the design and manufacturing process of bearing. The service life of bearing is also increasing, and the conventional method for detecting the service life of bearing is to carry out bearing life test. This test method is to test the service life of bearing under ideal conditions, which is quite different from the actual use of some bearings, and it is difficult to accurately reflect the wear and failure of bearing in actual use. In the presence of pollutants, the bearing raceway surface will produce indentation, wear and other phenomena, which will reduce the service life of bearing. The wear resistance of bearing raceway surface reflects the service life of bearing to some extent. SUMMARY

[0003] The utility model aims at overcoming the defects of prior art and providing a kind of testing devices of raceway surface indentation of tapered roller bearing, which can judge the service life of bearing and the quality of design, processing and manufacturing from different angles.

[0004] The utility model aims at overcoming the defects of prior art and providing a kind of testing devices of raceway surface indentation of tapered roller bearing, which can judge the service life of bearing and the quality of design, processing and manufacturing from different angles.

[0005] The central part of the connecting seat is provided with a threaded hole, and a plurality of threaded blind holes are uniformly arranged on the top surface of the threaded hole; a groove is formed in the center of the bottom surface of the connecting seat;

[0006] The shell includes a mounting bottom plate and a sleeve integrally connected to the top surface of the mounting bottom plate; the center of the mounting bottom plate is provided with a rectangular through hole coaxial with the threaded hole on the connecting seat, and a plurality of mounting holes are uniformly arranged on the periphery of the through hole, so that the shell is installed on the top surface of the connecting seat by a plurality of screws; a plurality of threaded blind holes are uniformly arranged on the top surface of the sleeve; the lower bearing seat is coaxially installed in the lower part of the sleeve of the shell, and the lower bearing seat is a barrel body with a bottom plate;

[0007] The upper bearing seat is coaxially installed in the sleeve of the shell and located above the lower bearing seat, and the upper bearing seat is a cylindrical body with a top ring plate;

[0008] The main shaft is coaxially installed in the 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 main shaft is connected to the driving mechanism;

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

[0010] The dismounting sleeve is installed in the test cavity and is installed on the main shaft through the 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 one by one;

[0011] A plurality of countersunk holes corresponding to a plurality of threaded blind holes on the top surface of the shell are formed on the cover plate, so that the cover plate is installed on the top surface of the shell through a plurality of screws.

[0012] The pressure sensor is installed in the through hole of the shell, and the bottom of the pressure sensor is provided with an axial abutting bolt installed in the threaded through hole of the connecting seat.

[0013] The test device for the surface indentation of the raceway of the tapered roller bearing, wherein a wiring groove in communication with the through hole is formed on the bottom surface of the mounting bottom plate of the shell; and a plurality of temperature sensors are installed on the side wall of the sleeve.

[0014] The test device for the surface indentation of the raceway of the tapered roller bearing, wherein the driving mechanism is a drilling machine.

[0015] The test device for the surface indentation of the raceway of the tapered roller bearing of the utility model has the characteristics that the bearing can be placed in a contaminated environment for destructive testing, and the appearance of the bearing raceway surface is damaged. By comparing the appearance, roughness, bearing rotation accuracy and bearing vibration speed of the bearing raceway before and after the test, the damage of the bearing raceway surface is judged, so that the anti-wear ability of the bearing raceway is detected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the axial sectional view of the test device for the surface indentation of the raceway of the tapered roller bearing of the utility model;

[0017] Fig. 2 It is the axial sectional view of the shell in the test device of the utility model;

[0018] Fig. 3 It is the axial sectional view of the assembly formed after the step S2 of completing the test by using the test device of the utility model. DETAILED DESCRIPTION

[0019] The utility model will be further described below with reference to the drawings.

[0020] Please refer to Figs. 1 to 3 The test device for the surface indentation of the raceway of the tapered roller bearing of the utility model comprises a connecting seat 1, a shell 2, a lower bearing seat 3, an upper bearing seat 4, a main shaft 5, two bearings to be tested 6, a dismounting sleeve 7, a cover plate 8 and a pressure sensor 9A.

[0021] The central part of the connecting seat 1 is provided with a threaded hole, and a plurality of threaded blind holes are uniformly arranged on the top surface of the outer periphery of the threaded hole; a groove is arranged in the center of the bottom surface of the connecting seat 1;

[0022] The shell 2 comprises a mounting bottom plate 21 and a sleeve 22 integrally connected to the top surface of the mounting bottom plate 21; the center of the mounting bottom plate 21 is provided with a rectangular through hole 20 coaxial with the threaded hole on the connecting seat 1, and a plurality of mounting holes are uniformly arranged on the outer periphery of the through hole 20, so that the shell 2 is mounted on the top surface of the connecting seat 1 through a plurality of screws; a wiring groove 210 is radially arranged on the bottom surface of the mounting bottom plate 21 and communicates with the through hole 20; a plurality of threaded blind holes are uniformly arranged on the top surface of the sleeve 22; three temperature sensors 9B are mounted on the side wall of the sleeve 22.

[0023] The lower bearing seat 3 is coaxially mounted in the lower part of the sleeve 22 of the shell 2, and the lower bearing seat 3 is a barrel body with a bottom plate;

[0024] The upper bearing seat 4 is coaxially mounted in the sleeve 22 of the shell 2 and located above the lower bearing seat 3, and the upper bearing seat 4 is a cylindrical body with a top ring plate;

[0025] The main shaft 5 is coaxially mounted 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, and the upper end of the main shaft 5 is connected to a driving mechanism; the driving mechanism is a drilling machine;

[0026] The two bearings to be tested 6 are sleeved on the lower part of the main shaft 5;

[0027] The dismounting sleeve 7 is mounted in the test cavity and is mounted on the main shaft 5 through a key 70 and is located between the two bearings to be tested 6, so that the two bearings to be tested 6 are one-to-one correspondingly mounted on 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;

[0028] A plurality of countersunk holes corresponding to the plurality of threaded blind holes on the top surface of the shell 2 are arranged on the cover plate 8, so that the cover plate 8 is mounted on the top surface of the shell 2 through a plurality of screws; an oil injection hole 80 can also be arranged on the cover plate 8 to prevent oil leakage of the test cavity and supplement oil;

[0029] The pressure sensor 9A is mounted in the through hole 20 of the shell 2, and the bottom of the pressure sensor 9A is provided with an axial abutting bolt 90 mounted in the threaded hole of the connecting seat 1.

[0030] The test device for the surface indentation of the raceway of the tapered roller bearing of the utility model is tested according to the following steps:

[0031] S1, check and record the appearance, roughness, rotation accuracy and vibration speed of the bearing 6 raceway surface; clean the spindle 5, disassembly sleeve 7, key 70, two bearings 6, upper bearing seat 3, lower bearing seat 4 and cover plate 8, check the appearance and size accuracy of each part;

[0032] S2, the inner assembly 61 of the two bearings 6 to be tested, the disassembly sleeve 7 and the key 70 are assembled on the spindle 5 (see Fig. 3 );

[0033] S3, the outer ring of the two bearings 6 to be tested is correspondingly installed 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;

[0034] S4, first, the lower bearing seat 3 is installed in the lower part of the sleeve 22 of the housing 2, then the assembly installed in step S2 is installed in the lower bearing seat 3, and then the upper bearing seat 4 is installed in the upper part of the sleeve 22 of the housing 2;

[0035] S5, first, appropriate lubricating oil and contaminants containing silicon carbide particles and hard alloy particles are added to the test cavity composed of the lower bearing seat 3 and the upper bearing seat 4; then the cover plate 8 is installed, and the cover plate 8 and the housing 2 are connected and fastened by bolts;

[0036] S6, first, the connecting seat 1 is connected and fastened with the workbench of the drilling machine by bolts, then the pressure sensor 9 is connected and fastened with the housing 2 and the connecting seat 1 through the axial abutting bolt 9, and the signal line of the pressure sensor 9 is led out through the wiring groove 210 on the connecting seat 1; then the spindle 5 is connected with the spindle of the drilling machine through the shaft coupling 50;

[0037] S7, start the drilling machine, drive the inner ring of the two bearings 6 to be tested through the spindle 5; after the spindle 5 rotates for 3-5 minutes, the axial force is applied to the two bearings 6 to be tested through the axial abutting bolt 9; the axial force applied by the axial abutting bolt 9 is controlled through the pressure sensor 9A, and the required axial force and the test time are applied according to the test requirements; the temperature rise of the two bearings 6 to be tested is recorded through the three temperature sensors 9B during the test;

[0038] S8, after the test is completed, the two bearings 6 to be tested are removed, and the two bearings 6 to be tested are cleaned;

[0039] S9, compare the appearance, roughness, rotation accuracy and vibration speed data of the two bearings 6 to be tested before and after the test, judge the damage of the raceway surface 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, so as to detect the anti-wear ability of the bearing raceway.

[0040] The above examples are only for illustrating the utility model, and are not limitation to the utility model. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the utility model, and all equivalent technical schemes should belong to the scope of the utility model, which should be limited by the claims.

Claims

1. A testing device for race surface indentation of a tapered roller bearing, comprising a connecting seat, a housing, 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; characterized in that, a threaded hole is arranged in the center of the connecting seat, and a plurality of threaded blind holes are arranged on the top surface of the periphery of the threaded hole; a groove is arranged in the center of the bottom surface of the connecting seat; the housing comprises a mounting bottom plate and a sleeve integrally connected to the top surface of the mounting bottom plate; a rectangular through hole coaxial with the threaded hole of the connecting seat is arranged in the center of the mounting bottom plate, and a plurality of mounting holes are arranged on the periphery of the through hole; the housing is mounted on the top surface of the connecting seat by a plurality of screws; a plurality of threaded blind holes are arranged on the top surface of the sleeve; the lower bearing seat is coaxially arranged in the lower part of the sleeve of the housing, and the lower bearing seat is a barrel body with a bottom plate; the upper bearing seat is coaxially arranged in the sleeve of the housing and above the lower bearing seat, and the upper bearing seat is a cylindrical body with a top ring plate; the main shaft is coaxially arranged in a testing cavity composed of the inner cavity of the lower bearing seat and the inner cavity of the upper bearing seat, and the upper end of the main shaft is connected to a driving mechanism; the two bearings to be tested are sleeved on the lower part of the main shaft; the dismounting sleeve is mounted in the testing cavity and is mounted on the main shaft by a key and is located between the two bearings to be tested, so that the two bearings to be tested are one-to-one mounted on the bottom of the inner cavity of the lower bearing seat and the top of the inner cavity of the upper bearing seat; a plurality of countersunk holes corresponding to the threaded blind holes on the top surface of the housing are arranged on the cover plate, so that the cover plate is mounted on the top surface of the housing by a plurality of screws; the pressure sensor is mounted in the through hole of the housing, and the bottom of the pressure sensor is provided with an axial abutting bolt mounted in the threaded hole of the connecting seat.

2. A device for testing a raceway surface indentation 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 bottom plate of the housing; a plurality of temperature sensors are mounted on the side wall of the sleeve.

3. A device for testing a raceway surface indentation of a tapered roller bearing according to claim 1, characterized in that the driving mechanism is a drilling machine.

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