Rolling bearing fatigue life test device

Abstract

The utility model discloses a rolling bearing fatigue life test device which comprises a computer and an operation table, a long shaft and a short shaft which are coaxial are arranged above the operation table, one end of the short shaft is connected with one end of the short shaft through a connecting shaft assembly, and the other end of the short shaft is provided with a driving mechanism. The long shaft is sleeved with a bearing seat used for fixing the rolling bearing and a radial load applying mechanism used for applying radial load to the bearing at the end, and an axial load applying mechanism used for applying axial load to the bearing at the left end is installed at the end of the operation table. A data acquisition assembly which is used for acquiring bearing data and is electrically connected with a computer is mounted on the bearing seat; and a torque meter which is used for monitoring a displacement signal of the rolling bearing and is electrically connected with the computer is mounted on the short shaft. According to the utility model, the loading of radial and axial variable loads on the rolling bearing can be realized, the automation degree is higher, and the problem that the performance test of the rolling bearing under the loading of variable loads cannot be carried out by the existing bearing test device is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing test devices, and more specifically relates to a rolling bearing fatigue life test device. Background Art

[0002] Bearings are an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. For many equipment, the life of the bearing directly determines the life of the equipment. Therefore, how to accurately calculate the life of the bearing and choose the right bearing has become a top priority in the design. Generally, the more common forms of bearing failure are fatigue pitting, plastic deformation, wear and bonding. In addition to overloading, the causes of these failures are basically caused by four reasons: assembly, lubrication, contamination and fatigue. Among them, although assembly, lubrication and contamination account for the majority of the proportion, they are human factors and are unreliable. Therefore, the fatigue life of the bearing is mainly studied.

[0003] In CN202111575216.7, a rolling bearing vibration detection test bench is provided, comprising a rolling bearing body and a detection bench, wherein a mounting frame is fixedly connected to the top of the detection bench, and pneumatic telescopic rods are installed on both sides of the mounting frame. The rolling bearing vibration detection test bench is provided with a pneumatic telescopic rod, a fixed frame, a fixed plate, a guide tube, a spring, a push rod and a first vibration detector, and the rolling bearing body is mounted on the mounting rod. The output shaft of the driving motor drives the mounting rod to rotate through the connecting rod, and the pneumatic telescopic rod is started. The telescopic end of the pneumatic telescopic rod extends, and the fixed frame and the fixed plate are pushed to move in the direction of the rolling bearing body. The soft pad on the inner wall of the fixed plate is attached to the outer ring of the rolling bearing body, and the spring pushes the push rod, and the first vibration detector is pressed on the surface of the outer ring of the rolling bearing body through the push rod, so that the vibration condition of the outer ring of the rolling bearing body can be tested, thereby testing the performance of the bearing. However, the test index of the device is single, and the performance test of the rolling bearing under the loading of variable loads cannot be tested, and the degree of automation is low. Utility Model Content

[0004] The utility model provides a rolling bearing fatigue life test device to overcome the problems that the existing bearing test device cannot perform the performance test of the rolling bearing under variable loads.

[0005] The utility model is realized by the following technical solutions:

[0006] A rolling bearing fatigue life test device comprises a computer and an operating table, wherein a coaxial long shaft and short shaft are horizontally arranged on the operating table, one end of the long shaft is connected to one end of the short shaft through a coupling assembly, the other end of the short shaft is equipped with a driving mechanism for driving the short shaft to rotate, the long shaft is sleeved with a bearing seat for fixing the rolling bearing, an axial load applying mechanism for applying an axial load to the bearing is installed on the long shaft, a radial load applying mechanism for applying a radial load to the bearing at this end is installed on the other end of the long shaft, and a data acquisition component for collecting rolling bearing data and electrically connected to the computer is installed on the bearing seat.

[0007] Furthermore, the shaft coupling assembly comprises a connecting block fixed at the end of the long shaft and a prismatic shaft fixed at the end of the short shaft, and the connecting block is provided with a prismatic groove for clamping the prismatic shaft.

[0008] Furthermore, the driving mechanism is a driving motor, and the power output end of the driving motor is connected to the short shaft through a coupling.

[0009] Furthermore, the radial load applying mechanism comprises a small pulley sleeved on the long shaft and a large pulley mounted on the operating table. The small pulley and the large pulley are provided with a belt linkage, and the large pulley is driven to rotate by a motor.

[0010] Furthermore, the large pulley is connected to the operating table via a mounting plate that can be raised and lowered.

[0011] Furthermore, the mounting plate is driven by a first cylinder to move vertically up and down, and the first cylinder is electrically connected to a computer.

[0012] Furthermore, the large pulley is installed below the operating table, and the operating table is provided with a through groove for the belt to pass independently.

[0013] Furthermore, the axial load applying mechanism includes a fixed plate fixed on the operating table, a conical block is installed on the fixed plate, and a second cylinder is provided between the fixed plate and the conical block to drive the conical block to match and separate with the conical groove at the end of the long axis.

[0014] Furthermore, the data acquisition component includes an acceleration sensor for detecting the temperature of the rolling bearing, a temperature sensor for detecting the acceleration of the rolling bearing and a vibration sensor for detecting the vibration signal of the rolling bearing. The acceleration sensor, temperature sensor and vibration sensor are all electrically connected to the computer.

[0015] Furthermore, a torque meter for monitoring the displacement signal of the rolling bearing and electrically connected to the computer is installed on the short shaft.

[0016] Compared with the prior art, the beneficial effects are:

[0017] The utility model applies force to the long shaft by setting an axial load applying mechanism and a radial load applying mechanism, thereby realizing radial and axial load tests on the rolling bearing at the same time. Specifically, the utility model drives the mounting plate to move up and down by the first cylinder, and then drives the large pulley to move up and down, thereby adjusting the tension of the belt, so that the left end of the long shaft is subjected to a downward and continuous force that can be changed at any time, thereby achieving the purpose of changing the radial load on the bearing, and drives the conical block to press against the end of the long shaft with different forces by the second cylinder, thereby realizing the loading of radial variable load and axial variable load on the rolling bearing, and at the same time cooperates with the acceleration sensor, temperature sensor, vibration sensor and torque meter to collect various data of the rolling bearing, and also has a higher degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the mid-radial load application mechanism;

[0020] The names of the components in the figure are: 1. Mounting plate; 2. First cylinder; 3. Large pulley; 4. Drive motor; 5. Operating table; 6. Short shaft; 7. Torque meter; 8. Prismatic shaft; 9. Connecting block; 10. Acceleration sensor; 11. Temperature sensor; 12. Long shaft; 13. Bearing seat; 14. Vibration sensor; 15. Small pulley; 16. Conical block; 17. Computer; 18. Second cylinder; 19. Belt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that if there are directional indications (such as up, down, left, right, front, and back) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. If there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] Example 1

[0026] This embodiment provides a rolling bearing fatigue life test device, including a computer 17 and an operating table 5, wherein a coaxial long shaft 12 and a short shaft 6 are horizontally arranged above the operating table 5, one end of the long shaft 12 is connected to one end of the short shaft 6 through a coupling assembly, so that when the short shaft 6 rotates, the long shaft 12 will also rotate, and the other end of the short shaft 6 is installed with a drive motor 4, and the power output end of the drive motor 4 is connected to the short shaft 6 through a coupling. An axial load applying mechanism for applying an axial load to the bearing is installed on the long shaft 12, and a radial load applying mechanism for applying a radial load to the bearing at this end is installed on the other end of the long shaft 12, and a data acquisition assembly for collecting rolling bearing data and electrically connected to the computer 17 is installed on the bearing seat 13.

[0027] Example 2

[0028] The present embodiment provides a rolling bearing fatigue life test device, comprising a computer 17 and an operating table 5, wherein a coaxial long axis 12 and a short axis 6 are horizontally arranged above the operating table 5, a connecting block 9 is fixed to one end of the long axis 12, and a prismatic shaft 8 is fixed to one end of the short axis 6, and a prismatic groove for clamping the prismatic shaft 8 is provided on the right side surface of the connecting block 9. The prismatic shaft 8 is inserted into the prismatic groove of the connecting block 9 to achieve docking of the long axis 12 and the short axis 6, so that when the short axis 6 rotates, the long axis 12 will also rotate. At the same time, this detachable connection also facilitates the installation of long axis 12 and rolling bearings of different specifications.

[0029] The other end of the short shaft 6 is equipped with a driving motor 4, and the power output end of the driving motor 4 is connected to the short shaft 6 through a coupling. An axial load applying mechanism for applying an axial load to the bearing is installed on the long shaft 12, and the long shaft 12 is provided with a bearing seat 13 for fixing the rolling bearing. The long shaft 12 is equipped with a rolling bearing, so that the rolling bearing is installed and the long shaft 12 is limited through the bearing seat 13. A small pulley 15 is also installed on the long shaft 12, and a large pulley 3 that is rotatably matched with it is installed on the operating table 5. The small pulley 15 and the large pulley 3 are jointly equipped with a belt 19, so that the long shaft 12 is subjected to a continuous force in a vertical direction, so as to achieve the purpose of providing a radial load on the bearing.

[0030] The operating table 5 at the other end of the long axis is fixed with a fixing plate, on which a conical block 16 is installed. A conical groove is opened at the end of the long axis 12, and the tip of the conical block 16 is pressed in the conical groove and rotated therewith, forming the axial load applying mechanism for applying axial load to the left end bearing.

[0031] The bearing seat 13 is equipped with an acceleration sensor 10 for detecting the temperature of the rolling bearing, a temperature sensor 11 for detecting the acceleration of the rolling bearing, and a vibration sensor 14 for detecting the vibration signal of the rolling bearing. The acceleration sensor 10, the temperature sensor 11 and the vibration sensor 14 are all electrically connected to the computer 17.

[0032] Example 3

[0033] The present embodiment provides a rolling bearing fatigue life test device, comprising a computer 17 and an operating table 5, wherein a coaxial long axis 12 and a short axis 6 are horizontally arranged above the operating table 5, a connecting block 9 is fixed to one end of the long axis 12, and a prismatic shaft 8 is fixed to one end of the short axis 6, and a prismatic groove for clamping the prismatic shaft 8 is provided on the right side surface of the connecting block 9. The prismatic shaft 8 is inserted into the prismatic groove of the connecting block 9 to achieve docking of the long axis 12 and the short axis 6, so that when the short axis 6 rotates, the long axis 12 will also rotate. At the same time, this detachable connection also facilitates the installation of long axis 12 and rolling bearings of different specifications.

[0034] The other end of the short shaft 6 is equipped with a driving motor 4, and the power output end of the driving motor 4 is connected to the short shaft 6 through a coupling. An axial load applying mechanism for applying an axial load to the bearing is installed on the long shaft 12, and the long shaft 12 is provided with a bearing seat 13 for fixing the rolling bearing. The long shaft 12 is equipped with a rolling bearing, so that the rolling bearing is installed and the long shaft 12 is limited through the bearing seat 13. A small pulley 15 is also installed on the long shaft 12, and a mounting plate 1 is installed below the operating table 5. A large pulley 3 that is rotatably matched with it is installed in the mounting plate 1. The small pulley 15 and the large pulley 3 are jointly equipped with a belt 19 through the through groove of the operating table. The bottom of the mounting plate 1 is equipped with a first cylinder 2 for driving the mounting plate 1 to move up and down. The mounting plate 1 is driven up and down by the first cylinder 2, and then the large pulley 3 is driven up and down, so as to adjust the tension of the belt 19, so that the long shaft 12 is subjected to a downward and continuous force that can be changed at any time, so as to achieve the purpose of changing the radial load on the left end bearing.

[0035] The operating table 5 at the other end of the long axis is fixed with a fixed plate, on which a conical block 16 is installed, and on which a second cylinder 18 for pushing the conical block 16 to move left and right is installed. A conical groove is opened at the end of the long axis 12, and the tip of the conical block 16 is pressed against the conical groove and rotated therewith. The conical block 16 is driven by the second cylinder 18 to press against the end of the long axis 12 with different forces, thereby applying an axial variable load to the bearing.

[0036] The bearing seats 13 are all equipped with an acceleration sensor 10 for detecting the temperature of the rolling bearing, a temperature sensor 11 for detecting the acceleration of the rolling bearing, and a vibration sensor 14 for detecting the vibration signal of the rolling bearing. The acceleration sensor 10, the temperature sensor 11, and the vibration sensor 14 are all electrically connected to the computer 17. The short shaft 6 is equipped with a torque meter 7 for monitoring the displacement signal of the rolling bearing and electrically connected to the computer 17. The performance line of the rolling bearing during the test can be detected in real time through the acceleration sensor 10, the temperature sensor 11, the vibration sensor 14, and the torque meter 7.

[0037] In this embodiment, the drive motor 4, the first cylinder 2 and the second cylinder 18 are electrically connected to the computer 17 through wires, so that the radial load and the axial load can be accurately controlled. Combined with the acceleration sensor 10, the temperature sensor 11, the vibration sensor 14 and the torque meter 7 to collect various data of the rolling bearing, the computer 17 can analyze and process the data to obtain the fatigue life data of the rolling bearing.

[0038] When this embodiment is used, firstly, two rolling bearings are mounted on the long shaft 12, and then installed on the bearing seat 13, and the prismatic shaft 8 is inserted into the prismatic groove of the connecting block 9, and then the driving motor 4 is started to drive the short shaft 6 and the long shaft 12 to rotate, and then the computer 17 is used to control the first cylinder 2 to drive the mounting plate 1 to move up and down and control the second cylinder 18 to press the long shaft 12 with different forces until it is detected that the rolling bearing has reached the fatigue limit and caused failure. At this time, the computer calculates the fatigue life of the rolling bearing based on the collected data and the radial and axial loads.

[0039] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A rolling bearing fatigue life test device, characterized in that: The invention comprises a computer (17) and an operating table (5), wherein a coaxial long shaft (12) and a short shaft (6) are horizontally arranged on the operating table (5), one end of the long shaft (12) is connected to one end of the short shaft (6) through a coupling assembly, the other end of the short shaft (6) is equipped with a driving mechanism for driving the short shaft (6) to rotate, the long shaft (12) is sleeved with a bearing seat (13) for fixing a rolling bearing, an axial load applying mechanism for applying an axial load to the bearing is installed on the long shaft, a radial load applying mechanism for applying a radial load to the bearing at this end is installed on the other end of the long shaft (12), and a data acquisition component for collecting rolling bearing data and electrically connected to the computer (17) is installed on the bearing seat (13).

2. The rolling bearing fatigue life test device according to claim 1, characterized in that: The shaft coupling assembly comprises a connecting block (9) fixed at the end of a long shaft (12) and an end prismatic shaft (8) fixed at the end of a short shaft (6); the connecting block (9) is provided with a prismatic groove for clamping the prismatic shaft (8).

3. The rolling bearing fatigue life test device according to claim 1, characterized in that: The driving mechanism is a driving motor (4), and the power output end of the driving motor (4) is connected to the short shaft (6) via a coupling.

4. The rolling bearing fatigue life test device according to claim 1, characterized in that: The radial load applying mechanism comprises a small pulley (15) sleeved on a long shaft (12) and a large pulley (3) mounted on an operating table (5); a belt (19) is provided between the small pulley (15) and the large pulley (3) for linkage, and the large pulley is driven to rotate by a motor.

5. The rolling bearing fatigue life test device according to claim 4, characterized in that: The large pulley (3) is connected to the operating table (5) via a mounting plate (1) that can be lifted up and down.

6. The rolling bearing fatigue life test device according to claim 5, characterized in that: The mounting plate (1) is driven by a first cylinder (2) to move vertically up and down, and the first cylinder (2) is electrically connected to a computer (17).

7. The rolling bearing fatigue life test device according to claim 4 or 5, characterized in that: The large pulley is installed below the operating table (5), and the operating table (5) is provided with a through groove for the belt (19) to pass independently.

8. The rolling bearing fatigue life test device according to claim 1, characterized in that: The axial load applying mechanism comprises a fixing plate fixed on an operating table (5), a conical block (16) being mounted on the fixing plate, and a second cylinder (18) being arranged between the fixing plate and the conical block (16) to drive the conical block (16) to match and separate with the conical groove at the end of the long shaft (12).

9. The rolling bearing fatigue life test device according to claim 1, characterized in that: The data acquisition component comprises an acceleration sensor (10) for detecting the temperature of a rolling bearing, a temperature sensor (11) for detecting the acceleration of the rolling bearing, and a vibration sensor (14) for detecting a vibration signal of the rolling bearing. The acceleration sensor (10), the temperature sensor (11), and the vibration sensor (14) are all electrically connected to a computer (17).

10. The rolling bearing fatigue life test device according to claim 1, characterized in that: The short shaft (6) is provided with a torque meter (7) for monitoring the displacement signal of the rolling bearing and electrically connected to the computer (17).

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