Bearing foreign matter service life testing machine

Abstract

The utility model relates to testing equipment, and particularly discloses a bearing foreign matter service life testing machine. The bearing foreign matter service life testing machine comprises a test box, a mounting module, a driving module and a loading module, wherein a test cavity is formed in the test box; the mounting module comprises a test shaft and a bushing, the test shaft comprises a test section, and the test section is arranged in the test cavity; a stirring unit is arranged on the test shaft, and the stirring unit comprises stirring blades; the lining sleeves the outer side of the test section, and a mounting interval is formed between the lining and the test section; the driving module is connected with the test shaft and drives the test shaft to rotate; and the loading module is used for applying an axial load between the bushing and the test shaft. The bearing foreign matter service life testing machine has the advantages of being simple in structure, sufficient in foreign matter excitation and reliable in test data.

Description

Technical Field

[0001] The utility model relates to a test device, in particular to a bearing foreign object life tester. Background Art

[0002] A bearing is 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. Service life is one of the key performance parameters of a bearing, and depending on the usage conditions of different bearings, the considerations for evaluating the bearing service life are also different. For example, for bearings used in harsh working conditions such as dust, the impact caused by foreign object intrusion needs to be fully considered when evaluating the bearing service life.

[0003] Research on the impact of foreign objects on the service life of rotating parts is not uncommon in the mechanical field, and there are existing cases for targeted test devices and test methods. For example, the Chinese invention patent application with the publication number CN 102507168A discloses a test method for a rotary shaft lip seal against dry dust. It uses a rotary shaft lip seal dust resistance test machine device, which consists of a suitable cavity and a rotating part. The cavity is used to hold the test liquid and install the seal, and the rotating part has a main shaft horizontally installed on a suitable bearing, and a test shaft is installed on the main shaft. The seal is installed on the rotary test machine, and a stirring blade is installed at the center position of the front end face of the test shaft to rotate with the shaft. A dust cover is installed at the outer circular end of the sealing cavity, and the dust cover contains test dust. The dust prevention and dust resistance capabilities of the lip seal are determined according to the amount of dust immersed between the lips of the seal at different rotational speeds.

[0004] However, the test object of the above test method is a seal, which has certain differences from the test object of this application, and the corresponding test requirements are also different. Therefore, it is difficult to directly transfer and use, and the test device needs to be redesigned. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a bearing foreign object life tester, which has the advantages of simple structure, sufficient foreign object excitation, and reliable test data.

[0006] To solve the above technical problem, the technical solution provided by the utility model is as follows: A bearing foreign object life tester at least includes:

[0007] A test chamber, in which a test cavity is provided;

[0008] An installation module, the installation module includes a test shaft and a bushing. The test shaft includes a test section, and the test section is arranged in the test cavity; a stirring unit is provided on the test shaft, and the stirring unit includes a stirring blade;

[0009] The described bushing is sleeved outside the test section, and an installation interval is formed between the bushing and the test section;

[0010] A driving module, the driving module is connected to the test shaft and drives the test shaft to rotate;

[0011] A loading module, the loading module is used to apply an axial load between the bushing and the test shaft.

[0012] During the test, the test bearing is placed in the installation interval, where the inner ring is sleeved on the test section and the outer ring is limited by the bushing. The loading module applies an axial load to the bushing, thereby indirectly applying a load to the bearing. A certain amount of test oil is injected into the test cavity to ensure that the test bearing is completely immersed, and a certain proportion of foreign objects are mixed in the test oil.

[0013] The driving module drives the test shaft to rotate, and the stirring unit also rotates synchronously, disturbing the test oil. Along with the flow of the test oil, foreign objects enter the test bearing, simulating the operation of the bearing under the condition of foreign object intrusion. The foreign object life of the test bearing can be obtained through the normal operation time of the test bearing.

[0014] The bearing foreign object life test machine of the present application can reliably disturb foreign objects, ensure that foreign objects fully invade the test bearing, and the working condition simulation is reliable. It has the advantages of simple structure, sufficient foreign object excitation, and reliable test data.

[0015] Preferably, the driving module includes a motor, and the motor is connected to the test shaft through a coupling.

[0016] Preferably, a disturbing unit is further provided at the bottom of the test cavity. The disturbing unit includes disturbing blades and a disturbing driving member for driving the disturbing blades to rotate; the rotation center line of the disturbing unit is perpendicular to the axis of the test shaft.

[0017] The disturbing unit can prevent foreign objects from settling at the bottom of the test cavity, improve the fluidity of foreign objects, and ensure that foreign objects fully invade.

[0018] Preferably, the stirring unit is separately provided from the test shaft and is sleeved on the test shaft, and the stirring unit can be replaced as needed.

[0019] Preferably, the number of the bushings is two, and the number of the corresponding installation intervals is also two; along the axial direction of the test shaft, the stirring unit is located between the two bushings.

[0020] Preferably, the stirring blades are spirally arranged with respect to the axis of the test shaft; the number of the stirring units is two, and the inclination directions of the stirring blades on the two stirring units are opposite.

[0021] By reasonably setting the rotation direction of the test shaft, the test oil can flow backward, thus ensuring that foreign objects can fully invade both test bearings.

[0022] Preferably, an outer ring mounting hole is provided on the bushing, and an outer ring stop block is provided in the outer ring mounting hole. One side of the outer ring stop block is an outer ring mounting section, and the outer ring mounting section extends to one end of the bushing. The test box axially limits one of the bushings, and the loading module is connected to the other bushing and applies an axial load.

[0023] Through the cooperation of the two bushings, the load application of the two test bearings can be realized. At the same time, the test shaft only plays a role in transmitting the load between the two bushings, and the overall test shaft is in a state of force balance axially, which has little influence on the rotational movement of the test shaft. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the bearing foreign object life test machine of this embodiment;

[0025] Figure 2 It is a schematic structural diagram of the cooperation between the test box and the mounting module in the bearing foreign object life test machine of this embodiment. Detailed Description of the Preferred Embodiment

[0026] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Embodiment

[0027] As Figure 1 and Figure 2 shown, a bearing foreign object life test machine includes a test box 2, a mounting module 3, a driving module 4 and a loading module 1, and a test cavity 21 is provided in the test box 2.

[0028] As Figure 1 and Figure 2 shown, the mounting module 3 includes a test shaft 31 and a bushing 32. The test shaft 31 includes a test section, and the test section is arranged in the test cavity 21. A stirring unit 6 is provided on the test shaft 31, and the stirring unit 6 includes stirring blades. The bushing 32 is sleeved outside the test section, and an installation section is formed between the bushing 32 and the test section.

[0029] Specifically, the stirring unit 6 is separately arranged from the test shaft 31 and is sleeved on the test shaft 31, and the stirring unit 6 can be replaced according to needs.

[0030] As Figure 2As shown, the driving module 4 is connected to the test shaft 31 and drives the test shaft 31 to rotate. Specifically, the driving module 4 includes a motor, and the motor is connected to the test shaft 31 through a coupling. The loading module 1 is used to apply an axial load between the bushing 32 and the test shaft 31.

[0031] As Figure 1 and Figure 2 shown, specifically, the number of the bushings 32 is two, and the number of the corresponding installation intervals is also two. In the axial direction of the test shaft 31, the stirring unit 6 is located between the two bushings 32.

[0032] As a specific implementation manner, the stirring blades are spirally arranged with respect to the axis of the test shaft 31; the number of the stirring units 6 is two, and the inclination directions of the stirring blades on the two stirring units 6 are opposite.

[0033] By reasonably setting the rotation direction of the test shaft 31, the reverse flow of the test oil can be realized, so as to ensure that foreign matters can fully invade both of the two test bearings 7.

[0034] As Figure 1 and Figure 2 shown, as a specific implementation manner, an outer ring mounting hole is provided on the bushing 32, an outer ring stop block is provided in the outer ring mounting hole, one side of the outer ring stop block is an outer ring installation interval, and the outer ring installation interval extends to one end of the bushing 32; the test box 2 axially limits one of the bushings 32, and the loading module 1 is connected to the other bushing 32 and applies an axial load.

[0035] Through the cooperation of the two bushings 32, the load application of the two test bearings 7 can be realized. At the same time, the test shaft 31 only plays a role in transmitting the load between the two bushings 32, and the test shaft 31 is in a state of balanced force in the axial direction as a whole, which has little influence on the rotational movement of the test shaft 31.

[0036] During the test, the test bearing 7 is placed in the installation interval, the inner ring is sleeved on the test segment, the outer ring is limited by the bushing 32, and the loading module 1 applies an axial load to the bushing 32, so as to indirectly apply a load to the bearing. A certain amount of test oil is injected into the test chamber 21 to ensure that the test bearing 7 is completely immersed, and a certain proportion of foreign matters are mixed in the test oil.

[0037] The driving module 4 drives the test shaft 31 to rotate, and the stirring unit 6 also rotates synchronously, disturbing the test oil. Along with the flow of the test oil, foreign matters enter the test bearing 7, simulating the operation of the bearing under the condition of foreign matter invasion. The foreign matter life of the test bearing 7 can be obtained through the normal operation time of the test bearing 7.

[0038] The bearing foreign object life test machine of the present application can reliably disturb foreign objects, ensure that the foreign objects fully penetrate into the test bearing 7, simulate the working conditions reliably, and has the advantages of simple structure, sufficient foreign object excitation, and reliable test data.

[0039] As Figure 1 and Figure 2 shown, further, a disturbance unit 5 is also provided at the bottom of the test chamber 21. The disturbance unit 5 includes a disturbance blade and a disturbance driving member for driving the disturbance blade to rotate. The rotation center line of the disturbance unit 5 is perpendicular to the axis of the test shaft 31. The disturbance unit 5 can prevent foreign objects from settling at the bottom of the test chamber 21, improve the fluidity of foreign objects, and ensure that foreign objects fully penetrate.

[0040] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bearing foreign body life tester, characterized in that: At least: A test box, wherein the test box is provided with a test chamber; An installation module, wherein the installation module comprises a test shaft and a bushing, wherein the test shaft comprises a test segment, and wherein the test segment is arranged in the test chamber; wherein a stirring unit is arranged on the test shaft, and wherein the stirring unit comprises a stirring blade; The bushing is sleeved on the outside of the test section, and an installation interval is formed between the bushing and the test section; A driving module, wherein the driving module is connected to the test shaft and drives the test shaft to rotate; A loading module is used to apply an axial load between the bushing and the test shaft.

2. The bearing foreign matter life tester according to claim 1, characterized in that: The driving module comprises a motor, and the motor is connected to the test shaft through a coupling.

3. The bearing foreign matter life tester according to claim 1, characterized in that: A disturbance unit is also provided at the bottom of the test chamber. The disturbance unit includes a disturbance blade and a disturbance driving member for driving the disturbance blade to rotate. The rotation center line of the disturbance unit is arranged perpendicular to the axis of the test shaft.

4. The bearing foreign matter life tester according to claim 1, characterized in that: The stirring unit is separately arranged from the test shaft and is sleeved on the test shaft.

5. The bearing foreign matter life testing machine according to any one of claims 1 to 4, characterized in that: The number of the bushings is two, and the number of the corresponding installation intervals is also two; in the axial direction along the test shaft, the stirring unit is located between the two bushings.

6. The bearing foreign matter life tester according to claim 5, characterized in that: The stirring blades are spirally arranged relative to the axis of the test shaft; there are two stirring units, and the stirring blades on the two stirring units are inclined in opposite directions.

7. The bearing foreign matter life tester according to claim 5, characterized in that: An outer ring mounting hole is provided on the bushing, an outer ring stopper is provided in the outer ring mounting hole, one side of the outer ring stopper is an outer ring mounting interval, and the outer ring mounting interval extends to one end of the bushing; the test box axially limits one of the bushings, and the loading module is connected to the other bushing and applies an axial load.

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