CN214584033U

CN214584033U - Horizontal loading antifriction bearing life-span test experiment platform

Info

Publication number: CN214584033U
Application number: CN202120812820.6U
Authority: CN
Inventors: 李长根; 高宏力; 郭亮; 由志超
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-02
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a service life test experiment table for a horizontal loading rolling bearing; the utility model discloses a variable frequency speed motor and loading device can simulate multiple rotational speed and load operating mode, test antifriction bearing reliability under the complicated operating mode. Various sensors are additionally arranged on the experiment table and used for collecting the running data of the bearing under multiple working conditions, and the running data is used for the relevant research of the life prediction of the rolling bearing. The experiment table is compact in structure and high in operation reliability. The loading device part uses the hydraulic cylinder for loading, so that the situation that looseness occurs due to the vibration of the experiment table under the traditional situation that a screw rod and a nut are matched for screwing and loading is avoided, and the loading pressure can be kept stable. On the other hand, the test bearing plate and the loading slide block are matched for use, so that the bearing is supported under the stress condition, and the condition that the transmission shaft is subjected to fatigue fracture under the action of long-time stress due to the fact that a shaft section of a loading part is designed into a cantilever beam by a plurality of test experiment tables is avoided.

Description

Horizontal loading antifriction bearing life-span test experiment platform

Technical Field

The utility model relates to a reliability test technical field of mechanical equipment key spare part especially relates to a horizontal loading antifriction bearing life-span test experiment platform.

Background

The bearing bears the tasks of supporting the shafting and ensuring the smooth and steady operation of the machine in the working process of the rotating equipment. Nowadays, bearings are widely used in various fields as a basic component of mechanical equipment. The dependence of various mechanical devices on standard bearings and non-standard bearings is also rapidly increasing. On one hand, the bearing gradually becomes one of the key parts of the mechanical equipment, and on the other hand, the bearing also becomes one of the weakest parts in the process of ensuring the stable and reliable operation of the mechanical equipment, and is the largest cause of mechanical failure of the mechanical equipment, so that the normal operation of the bearing is very important for the stable operation of the mechanical equipment. There are data indicating that more than 40% of mechanical failures occur in connection with rolling bearings. Therefore, the deep research on the operational reliability of the bearing has important practical and theoretical significance. The working state of the bearing is not only directly related to the production efficiency of mechanical equipment, but also plays an important role in the field of safe production of equipment. The failure of critical parts of mechanical equipment often occurs suddenly, and these emergencies also often cause serious casualties and huge economic losses. Therefore, how to effectively prevent and avoid the safety accidents of the mechanical equipment caused by the failure or the faults of the bearing and improve the reliability and the safety of the operation of the equipment is always the most concerned and urgent problem to be solved in the fault prediction and the health management of the mechanical equipment.

Based on traditional antifriction bearing life-span test experiment table, most of structures are complicated, and manufacturing cost is high, and volume weight is big etc. the use and the transportation of inconvenient personnel like this bring certain trouble to personnel's installation, for this reason we provide a horizontal loading antifriction bearing life-span test experiment table and solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems of complex structure, high manufacturing cost and large volume and weight in the prior art, and providing a horizontal loading rolling bearing life test experiment table.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a horizontal loading rolling bearing service life test experiment table comprises an experiment table, and a driving device, a dustproof device and a loading device which are arranged in the experiment table;

the driving device comprises a variable frequency speed regulating motor, a coupler, a flat key, a transmission shaft and a double-row self-aligning bearing; the end part of the output shaft of the variable-frequency speed-regulating motor is attached to one end of the transmission shaft, and the outer side wall of the output shaft of the variable-frequency speed-regulating motor is attached to the inner side wall of the coupler; the inner side wall of the coupler is attached to the outer side wall of the flat key; the outer side wall of the flat key is attached to an output shaft of the variable-frequency speed-regulating motor, and the outer side wall of the flat key is attached to one end of the transmission shaft; the inner side wall of the double-row self-aligning bearing is attached to the outer side wall of the transmission shaft; one end of the transmission shaft is attached to the inner side wall of the coupler;

the loading device comprises a test bearing, a jackscrew, an elastic retainer ring, a round nut, a loading slide block and a hydraulic assembly; the inner side wall of the test bearing is attached to the outer side wall of the other end of the transmission shaft, and the end part of the test bearing is attached to the elastic check ring; the jackscrew is arranged on the test bearing; the outer side wall of the elastic retainer ring is attached to the round nut; and the inner side wall of the loading sliding block is attached to the outer side wall of the test bearing.

Preferably, the dustproof device comprises an oil-immersed felt ring, a bearing end cover and a dustproof end cover; the oil immersion felt ring is arranged at one end of the bearing end cover, and the oil immersion felt ring is arranged at one end of the dustproof end cover; the bearing end cover and the dustproof end cover are symmetrically arranged along the central axis of the double-row self-aligning bearing.

Preferably, the hydraulic assembly comprises a small force transmission shaft, a pressure sensor, a hydraulic cylinder, a manual valve and a manual pump; the internal thread at the tail part of the force transmission small shaft is connected with the external thread at one end of the pressure sensor; the other end of the pressure sensor is connected with an output shaft of the hydraulic cylinder; the other end of the hydraulic cylinder is connected with an output device of the manual pump; the manual valve is arranged at the output end of the manual pump.

Preferably, the experiment table comprises a bottom plate, a test supporting part is attached to the top of the bottom plate, an adjustable foot cup is arranged at the bottom of the bottom plate, a third inner hexagon screw is arranged at the bottom of the bottom plate, a fourth inner hexagon screw is arranged at the top of the bottom plate, a fifth inner hexagon screw is arranged at the top of the bottom plate, a sixth inner hexagon screw is arranged at the bottom of the bottom plate, a motor adjusting block is attached to the top of the bottom plate, an adjusting screw is arranged on the outer side wall of the motor adjusting block, an eighth inner hexagon screw is arranged at the top of the motor adjusting block, a motor mounting base is attached to the top of the bottom plate, a bearing seat is attached to the top of the bottom plate, a first inner hexagon screw is arranged on the outer side wall of the bearing seat, a second inner hexagon screw is arranged on the outer side wall of the bearing seat, and a lower half seat is arranged at the top of the bearing seat, the top of the lower half seat is attached to the upper half seat, a seventh inner hexagon screw is arranged at the top of the upper half seat, the outer side wall of the loading sliding block is fixedly connected with a handle, and the outer side wall of the loading sliding block is movably connected with a test supporting plate.

Preferably, the test supporting component is connected with the bottom plate through a third inner hexagonal screw, the test bearing is arranged inside the test supporting component, the double-row self-aligning bearing is arranged inside the bearing seat, the bearing seat is connected with the bottom plate through a fourth inner hexagonal screw, the variable-frequency speed-regulating motor is connected with the motor installation base through a fifth inner hexagonal screw, the motor installation base is connected with the bottom plate through a sixth inner hexagonal screw, the upper half seat is connected with the lower half seat through a seventh inner hexagonal screw, and the motor adjusting block is connected with the bottom plate through an eighth inner hexagonal screw.

Preferably, the bearing end cover is connected with the bearing seat through the first inner hexagon screw, and the dustproof end cover is connected with the bearing seat through the second inner hexagon screw.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a variable frequency speed motor and loading device can simulate multiple rotational speed and load operating mode, test antifriction bearing reliability under the complicated operating mode. Various sensors are additionally arranged on the experiment table and used for collecting the running data of the bearing under multiple working conditions, and the running data is used for the relevant research of the life prediction of the rolling bearing. The experiment table is compact in structure and high in operation reliability. The loading device part uses the hydraulic cylinder for loading, so that the situation that looseness occurs due to the vibration of the experiment table under the traditional situation that a screw rod and a nut are matched for screwing and loading is avoided, and the loading pressure can be kept stable. On the other hand, the test bearing plate and the loading slide block are matched for use, so that the bearing is supported under the stress condition, and the condition that the transmission shaft is subjected to fatigue fracture under the action of long-time stress due to the fact that a shaft section of a loading part is designed into a cantilever beam by a plurality of test experiment tables is avoided. Therefore, the experimental table is very suitable for colleges and universities, scientific research institutions and manufacturing enterprises for researching the reliability of the bearing. The method has positive significance for the life prediction research of the rolling bearing.

Drawings

Fig. 1 is a schematic front structural view of a service life testing experiment table for a horizontal loading rolling bearing provided by the utility model;

fig. 2 is a schematic top plan view of the experiment table for testing the service life of the horizontal loading rolling bearing provided by the present invention;

fig. 3 is a schematic view of a front structure of a split bearing seat of a horizontal loading rolling bearing life test experiment table provided by the utility model;

fig. 4 is a schematic structural view of a test supporting part of the horizontal loading rolling bearing life test experiment table provided by the utility model;

fig. 5 is the utility model provides a structure loading slider structure sketch map of horizontal loading antifriction bearing life-span test experiment platform.

In the figure: 1 variable frequency speed regulation motor, 2 couplings, 3 flat keys, 4 transmission shafts, 5 oil-immersed felt rings, 6 bearing end covers, 7 first inner hexagonal screws, 8 double-row self-aligning bearings, 9 dustproof end covers, 10 second inner hexagonal screws, 11 test supporting parts, 12 test bearings, 13 jackscrews, 14 elastic check rings, 15 round nuts, 16 adjustable foot cups, 17 third inner hexagonal screws, 18 fourth inner hexagonal screws, 19 bottom plates, 20 fifth inner hexagonal screws, 21 sixth inner hexagonal screws, 22 upper half seats, 23 seventh inner hexagonal screws, 24 lower half seats, 25 loading sliders, 26 test supporting plates, 27 handles, 28 force transmission small shafts, 29 pressure sensors, 30 hydraulic cylinders, 31 manual valves, 32 manual pumps, 33 motor adjusting blocks, 34 adjusting screws, 35 eighth inner hexagonal screws, 36 motor mounting bases and 37 bearing seats.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-5, a horizontal loading rolling bearing life test experiment table comprises an experiment table, and a driving device, a dustproof device and a loading device which are arranged in the experiment table;

the driving device comprises a variable frequency speed regulating motor 1, a coupler 2, a flat key 3, a transmission shaft 4 and a double-row self-aligning bearing 8; the end part of the output shaft of the variable-frequency speed-regulating motor 1 is attached to one end of the transmission shaft 4, and the outer side wall of the output shaft of the variable-frequency speed-regulating motor 1 is attached to the inner side wall of the coupler 2; the inner side wall of the coupler 2 is attached to the outer side wall of the flat key 3; the outer side wall of the flat key 3 is attached to an output shaft of the variable-frequency speed-regulating motor 1, and the outer side wall of the flat key 3 is attached to one end of the transmission shaft 4; the inner side wall of the double-row self-aligning bearing 8 is attached to the outer side wall of the transmission shaft 4; one end of the transmission shaft 4 is attached to the inner side wall of the coupler 2;

the loading device comprises a test bearing 12, a jackscrew 13, an elastic retainer ring 14, a round nut 15, a loading slide block 25 and a hydraulic component; the inner side wall of the test bearing 12 is attached to the outer side wall of the other end of the transmission shaft 4, and the end part of the test bearing 12 is attached to an elastic check ring 14; the jackscrew 13 is arranged on the test bearing 12; the outer side wall of the elastic retainer ring 14 is attached to the round nut 15; the inner side wall of the loading slider 25 is attached to the outer side wall of the test bearing 12.

The dustproof device comprises an oil-immersed felt ring 5, a bearing end cover 6 and a dustproof end cover 9; the oil-immersed felt ring 5 is arranged at one end of the bearing end cover 6, and the oil-immersed felt ring 5 is arranged at one end of the dustproof end cover 9; the bearing end cover 6 and the dustproof end cover 9 are symmetrically arranged along the central axis of the double-row self-aligning bearing 8.

The hydraulic assembly comprises a small force transmission shaft 28, a pressure sensor 29, a hydraulic cylinder 30, a manual valve 31 and a manual pump 32; the internal thread at the tail part of the small force transmission shaft 28 is connected with the external thread at one end of the pressure sensor 29; the other end of the pressure sensor 29 is connected with an output shaft of a hydraulic cylinder 30; the other end of the hydraulic cylinder 30 is connected with the output of a manual pump 32; a manual valve 31 is provided at the output of the manual pump 32.

Wherein, the experiment table comprises a bottom plate 19, a test supporting component 11 is jointed with the top of the bottom plate 19, an adjustable foot cup 16 is arranged at the bottom of the bottom plate 19, a third inner hexagon screw 17 is arranged at the bottom of the bottom plate 19, a fourth inner hexagon screw 18 is arranged at the top of the bottom plate 19, a fifth inner hexagon screw 20 is arranged at the top of the bottom plate 19, a sixth inner hexagon screw 21 is arranged at the bottom of the bottom plate 19, a motor adjusting block 33 is jointed with the top of the bottom plate 19, an adjusting screw 34 is arranged on the outer side wall of the motor adjusting block 33, an eighth inner hexagon screw 35 is arranged at the top of the motor adjusting block 33, a motor mounting base 36 is jointed with the top of the bottom plate 19, a bearing seat 37 is jointed with the top of the bottom plate 19, a first inner hexagon screw 7 is arranged on the outer side wall of the bearing seat 37, a second inner hexagon screw 10 is arranged on the outer side wall of the bearing seat 37, a lower half seat 24 is arranged at the top of the bearing seat 37, the top of the lower seat 24 is attached to the upper seat 22, the top of the upper seat 22 is provided with a seventh socket head cap screw 23, the outer side wall of the loading slider 25 is fixedly connected with a handle 27, and the outer side wall of the loading slider 25 is movably connected with a test supporting plate 26.

The test supporting component 11 is connected with the bottom plate 19 through a third socket head cap screw 17, the test bearing 12 is arranged inside the test supporting component 11, the double-row self-aligning bearing 8 is arranged inside a bearing seat 37, the bearing seat 37 is connected with the bottom plate 19 through a fourth socket head cap screw 18, the variable-frequency speed-regulating motor 1 is connected with a motor mounting base 36 through a fifth socket head cap screw 20, the motor mounting base 36 is connected with the bottom plate 19 through a sixth socket head cap screw 21, the upper half seat 22 is connected with the lower half seat 24 through a seventh socket head cap screw 23, and the motor adjusting block 33 is connected with the bottom plate 19 through an eighth socket head cap screw 35.

The bearing end cover 6 is connected with the bearing seat 37 through a first inner hexagon screw 7, and the dustproof end cover 9 is connected with the bearing seat 37 through a second inner hexagon screw 10.

The utility model discloses in, under variable frequency speed motor 1's drive, carry transmission shaft 4 with power through shaft coupling 2 and flat key 3. The transmission shaft 4 is supported by a double-row self-aligning bearing 8 and a bearing seat 37, which is structured as shown in fig. 3, and the upper half seat 22 and the lower half seat 24 are connected by a seventh socket head cap screw 23. The double-row self-aligning bearing 8 is tightly pressed by the bearing end cover 6, and the oil-immersed felt ring 5 is embedded in the bearing end cover 6 to prevent dust from entering the bearing seat. The bearing end cover 6 is fixed on the bearing seat 37 by a first socket head cap screw 7. The dust cap 9 is attached to the bearing block 37 by a second socket head cap screw 10. The test bearing 12 is a bearing with a jackscrew 13 for locking, and after the test bearing 12 is positioned on a shaft, the inner ring of the bearing and the shaft can be relatively fixed by screwing the jackscrew 13. In order to ensure that the test bearing 12 is fixed more reliably, a circlip 14 for a round nut is also used on the right end face of the bearing to be matched and screwed with the round nut 15. The outer ring of the test bearing 12 is in contact with the test support member 11;

the specific structure of the test support member is shown in fig. 4, and is composed of a test support plate 26 and a loading slider 25, and a guide groove is formed on the test support plate 26 and is matched with a guide key on the loading slider 25 for use to play a guiding role. The loading slide block 25 moves rightwards to contact with the outer ring of the test bearing 12 to transmit pressure, and the condition that the shaft bears load is simulated. The loading slider 25 is provided with a handle 27, and when the test is completed, the slider is slid leftwards by the handle 27 and is far away from the bearing, so that the bearing 12 is conveniently tested and taken down. The force on the loading slide 25 comes from a force transmission small shaft 28 in the top view of the experiment table shown in fig. 2, and the internal thread at the tail part of the force transmission small shaft 28 is connected with the external thread of a pressure sensor 29. The other end of the pressure sensor 29 is connected to an output shaft of a hydraulic cylinder 30. The pressure oil in the hydraulic cylinder 30 comes from a manual pump 32, and the flow of the pressure oil can be controlled by adjusting a manual valve 31. In the hydraulic loading part, the pressure sensor 29 can accurately measure the pressure of the hydraulic cylinder 30 acting on the test bearing 12, so that the load can be controlled conveniently;

the test support member 11, the hydraulic cylinder 30, the bearing housing, and the like are attached to the base plate 19 by socket head cap screws. The variable frequency speed regulating motor 1 is connected with a motor mounting base 36 through a fifth hexagon socket head cap screw 20, and the motor mounting base 36 is connected with a bottom plate 19 through a bolt. The threaded through hole of the bottom plate 19 connected with the motor mounting base 36 is in coarse fit with the socket head cap screw, so that the rotation angle of the motor can be adjusted by using the adjusting screw 34 on the motor adjusting block 33, and the centering of the motor and the transmission shaft is facilitated. Motor adjustment block 33 is mounted to base plate 19 by an eighth socket head cap screw 35. The base plate 19 is mounted on the floor by means of adjustable foot cups 16, the support height of each of which is adjustable, thus making the laboratory bench relatively stable even on uneven floors. And the bottom of the foot cup is provided with a rubber pad which can play a role in damping and buffering.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A horizontal loading rolling bearing service life test experiment table is characterized by comprising an experiment table, and a driving device, a dustproof device and a loading device which are arranged in the experiment table;

the driving device comprises a variable frequency speed regulating motor (1), a coupler (2), a flat key (3), a transmission shaft (4) and a double-row self-aligning bearing (8); the end part of the output shaft of the variable-frequency speed-regulating motor (1) is attached to one end of the transmission shaft (4), and the outer side wall of the output shaft of the variable-frequency speed-regulating motor (1) is attached to the inner side wall of the coupler (2); the inner side wall of the coupler (2) is attached to the outer side wall of the flat key (3); the outer side wall of the flat key (3) is attached to the output shaft of the variable-frequency speed-regulating motor (1), and the outer side wall of the flat key (3) is attached to one end of the transmission shaft (4); the inner side wall of the double-row self-aligning bearing (8) is attached to the outer side wall of the transmission shaft (4); one end of the transmission shaft (4) is attached to the inner side wall of the coupler (2);

the loading device comprises a test bearing (12), a jackscrew (13), an elastic retainer ring (14), a round nut (15), a loading slide block (25) and a hydraulic assembly; the inner side wall of the test bearing (12) is attached to the outer side wall of the other end of the transmission shaft (4), and the end part of the test bearing (12) is attached to an elastic check ring (14); the jackscrew (13) is arranged on the test bearing (12); the outer side wall of the elastic retainer ring (14) is attached to the round nut (15); and the inner side wall of the loading sliding block (25) is attached to the outer side wall of the test bearing (12).

2. The horizontal loading rolling bearing service life test experiment table according to claim 1, wherein the dustproof device comprises an oil-immersed felt ring (5), a bearing end cover (6) and a dustproof end cover (9); the oil-immersed felt ring (5) is arranged at one end of the bearing end cover (6), and the oil-immersed felt ring (5) is arranged at one end of the dustproof end cover (9); the bearing end cover (6) and the dustproof end cover (9) are symmetrically arranged along the central axis of the double-row self-aligning bearing (8).

3. The horizontal loading rolling bearing service life test experiment table according to claim 1, wherein the hydraulic assembly comprises a force transmission small shaft (28), a pressure sensor (29), a hydraulic cylinder (30), a manual valve (31) and a manual pump (32); the internal thread at the tail part of the small force transmission shaft (28) is connected with the external thread at one end of the pressure sensor (29); the other end of the pressure sensor (29) is connected with an output shaft of the hydraulic cylinder (30); the other end of the hydraulic cylinder (30) is connected with the output of the manual pump (32); the manual valve (31) is arranged at the output end of the manual pump (32).

4. The horizontal loading rolling bearing service life test bench according to claim 2, wherein the bench comprises a bottom plate (19), the top of the bottom plate (19) is attached with a test supporting component (11), the bottom of the bottom plate (19) is provided with an adjustable foot cup (16), the bottom of the bottom plate (19) is provided with a third socket head cap screw (17), the top of the bottom plate (19) is provided with a fourth socket head cap screw (18), the top of the bottom plate (19) is provided with a fifth socket head cap screw (20), the bottom of the bottom plate (19) is provided with a sixth socket head cap screw (21), the top of the bottom plate (19) is attached with a motor adjusting block (33), the outer side wall of the motor adjusting block (33) is provided with an adjusting screw (34), the top of the motor adjusting block (33) is provided with an eighth socket head cap screw (35), the utility model discloses a loading slider, including bottom plate (19), bearing frame (37), first socket head cap screw (7), second socket head cap screw (10), first socket head cap screw (22), the top of first socket head cap screw (22) is provided with seventh socket head cap screw (23), the lateral wall fixedly connected with handle (27) of loading slider (25), the lateral wall swing joint of loading slider (25) has test bearing plate (26).

5. The horizontal loading rolling bearing service life test experiment table according to claim 4, wherein the test supporting component (11) and the bottom plate (19) are connected through the third socket head cap screw (17), the test bearing (12) is arranged inside the test supporting component (11), the double-row self-aligning bearing (8) is arranged inside the bearing seat (37), the bearing seat (37) and the bottom plate (19) are connected through the fourth socket head cap screw (18), the variable frequency speed motor (1) and the motor mounting base (36) are connected through the fifth socket head cap screw (20), the motor mounting base (36) and the bottom plate (19) are connected through the sixth socket head cap screw (21), and the upper half seat (22) and the lower half seat (24) are connected through the seventh socket head cap screw (23), the motor adjusting block (33) is connected with the bottom plate (19) through the eighth inner hexagonal screw (35).

6. The service life test experiment table for the horizontal loading rolling bearing according to claim 4, wherein the bearing end cover (6) is connected with the bearing seat (37) through the first socket head cap screw (7), and the dustproof end cover (9) is connected with the bearing seat (37) through the second socket head cap screw (10).