Test equipment for bearing

Abstract

The invention provides bearing test equipment suitable for testing the rated life of a roller bearing, and the equipment comprises a support which is suitable for assembling an outer ring of a to-be-tested bearing; the revolving body is coaxially assembled on the inner ring of the bearing and is configured to synchronously rotate along with the inner ring of the bearing; and the loading mechanism is configured to apply the same torque to the two axial ends of the rotary body and enable the inner ring of the bearing to be subjected to a dynamic load extending in the radial direction. The revolving body configured by the test equipment can be regarded as a lever structure. The rotary body is configured to synchronously rotate along with the inner ring of the bearing, and the loading mechanism is configured to apply the same torque to the two axial ends of the rotary body, so that the test equipment does not generate bending moment in the operation process. And the test equipment can operate stably, reliably and safely. Moreover, the dynamic load applied to the bearing along the radial direction is not influenced by the strength of the connecting part of the bracket and the outer ring of the bearing, so that larger dynamic load can be applied, and the test time is greatly shortened.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of bearing detection equipment, and in particular, to a bearing testing equipment. Background Art

[0002] In heavy machinery and equipment such as heavy industry, wind power generation, marine engineering, civil engineering, medical equipment, etc., large bearings (such as bearings with an inner ring diameter of 1 meter or more) are often used due to the requirements of bearing huge loads and / or high assembly precision.

[0003] The rated life of bearings is an important indicator for large bearings. It plays a vital role in the cost-effectiveness, reliability and production efficiency of heavy machinery and equipment. Therefore, it needs to be quantitatively tested.

[0004] At present, the test equipment for detecting the rated life of large bearings mainly includes a bracket with mounting holes. After the outer ring of the large bearing is assembled in the mounting hole of the bracket, the inner ring of the large bearing needs to be equipped with corresponding weights, and then the inner ring of the large bearing is driven to rotate relative to the outer ring through a driving mechanism to obtain the dynamic load of the large bearing, thereby calculating the rated life of the large bearing.

[0005] In existing test equipment, the counterweight configured on the inner ring acts on one side of the large bearing in the axial direction. Limited by the strength of the connection between the large bearing and the bracket, if the counterweight is set too large, it will cause one side of the bracket to bear too much bending moment, thus making the connection between the bracket and the large bearing ineffective.

[0006] Therefore, how to reduce the bending moment borne on one side of the bracket to make the testing process smooth, safe and reliable has become a technical problem that needs to be solved urgently. Summary of the invention

[0007] In order to solve at least one of the above-mentioned and other technical problems in the prior art, the present disclosure provides a bearing testing device, which can effectively solve the above-mentioned problem by configuring a rotating body that rotates synchronously with the inner ring of the bearing, and a loading mechanism that applies the same torque to both axial ends of the rotating body.

[0008] The present invention provides a bearing test device suitable for testing the rated life of a roller bearing, comprising: a bracket having a mounting hole, wherein the mounting hole is suitable for assembling the outer ring of the bearing to be tested; a rotating body coaxially assembled on the inner ring of the bearing and configured to rotate synchronously with the inner ring of the bearing; and a loading mechanism configured to apply the same torque to the axial ends of the rotating body and subject the inner ring of the bearing to a dynamic load extending in a radial direction.

[0009] According to an embodiment of the present disclosure, the loading mechanism includes: a base, which is arranged on the bracket; at least two first pulleys, one of the first pulleys is rotatably mounted on one end of the axial direction of the rotating body, and the other first pulley is rotatably mounted on the other end of the axial direction of the rotating body; a cable, having a fixed end and a free end, the fixed end of the cable is connected to the base, and the portion of the cable between the fixed end and the free end is wound in the grooves of the two first pulleys; and a pulling portion, which is connected to the free end of the cable and is configured to adjustably apply a pulling force to the cable along the length direction so as to apply a torque to the first pulley along the radial direction of the rotating body.

[0010] According to an embodiment of the present disclosure, the distances between the two first pulleys and the axial midpoint of the rotating body are the same.

[0011] According to an embodiment of the present disclosure, the loading mechanism includes two first pulley groups, and each of the first pulley groups includes at least one first pulley.

[0012] According to an embodiment of the present disclosure, the loading mechanism further includes: a second pulley block, which is arranged on the base, the second pulley block includes a plurality of second pulleys, and the portion of the cable between the fixed end and the free end is wound in the wheel groove of the second pulley; wherein the pulley block is configured to guide the cable to reverse direction, so that the fixed end and the free end of the cable extend in a radial direction parallel to the rotating body, and the portion of the cable between the fixed end and the free end extends in an axial direction of the rotating body.

[0013] According to an embodiment of the present disclosure, the loading mechanism further includes: a buffer assembly, which is disposed on the base and connected to the fixed end of the cable.

[0014] According to an embodiment of the present disclosure, the buffer assembly includes: at least one elastic member, one end of the elastic member is connected to the base, and the other end of the elastic member is connected to the fixed end of the cable.

[0015] According to an embodiment of the present disclosure, the above-mentioned test equipment further includes: a detection component, connected to the above-mentioned cable, and configured to detect the tension exerted on the above-mentioned cable.

[0016] According to an embodiment of the present disclosure, the test equipment further comprises a driving mechanism configured to drive the rotation of the inner ring fixed axis of the bearing.

[0017] According to the technical solution provided by the schematic embodiment of the present disclosure, the rotating body configured in the test equipment can be regarded as a lever structure. The rotating body is configured to rotate synchronously with the inner ring of the bearing, and the loading mechanism is configured to apply the same torque to both axial ends of the rotating body, so that during the operation of the test equipment, the torques on both axial sides of the inner ring of the bearing are offset, and no bending moment is generated. In this way, during the test process, the test equipment can operate stably, reliably and safely. In addition, since no bending moment is generated, the dynamic load applied to the bearing in the radial direction is not limited by the strength of the connection between the bracket and the outer ring of the bearing. For this reason, a larger dynamic load can be applied, which is conducive to shortening the test time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematically shows a front view of a test device according to an embodiment of the present disclosure;

[0019] Figure 2 yes Figure 1 A partial cross-sectional view taken along line AA of the exemplary embodiment shown;

[0020] Figure 3 yes Figure 1 A perspective view of the loading mechanism of the exemplary embodiment shown;

[0021] Figure 4 is a perspective view of a loading mechanism according to another exemplary embodiment; and

[0022] Figure 5 yes Figure 3 and Figure 4 A partial cross-sectional view of a portion of a buffer assembly is shown.

[0023] In the drawings, the meanings of the reference numerals are as follows:

[0024] 1. Bracket;

[0025] 2. Bearings;

[0026] 21. Outer ring;

[0027] 22. Inner circle;

[0028] 23. Extension end;

[0029] 3. Turntable body;

[0030] 4. Rotating body;

[0031] 5. Loading mechanism;

[0032] 51. First pulley;

[0033] 52. Cable;

[0034] 521, fixed end;

[0035] 522, free end;

[0036] 53. Pulling part;

[0037] 531, pull rod;

[0038] 532. Nut;

[0039] 54. Base;

[0040] 541, first connecting member;

[0041] 542, second connecting member;

[0042] 543, limit plate;

[0043] 55. Buffer component;

[0044] 56. Second pulley;

[0045] 57. Connector;

[0046] 6. Detection components;

[0047] 7. Driving mechanism. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0049] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0050] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0051] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0052] The rated life of large bearings (including but not limited to rolling bearings with an inner ring diameter of 1 meter or more) can be tested and calculated in accordance with relevant standards.

[0053] For example, according to the standard ISO 281 / GB6391, the rated life of the bearing is L10 = (C r / P r ) 3 , where C r Characterized by the basic dynamic load rating of the bearing, P r Characterized as the equivalent dynamic load on the bearing.

[0054] In the formula, the basic dynamic load rating of the bearing (i.e. C r ) is obtained based on the type, size, material and quality standard of the bearing and is a known value. Therefore, only the equivalent dynamic load of the bearing (i.e. P) is obtained in the test. r ) can calculate the rated life of the bearing.

[0055] At present, the test equipment for testing the rated life of large bearings mainly includes a bracket with mounting holes. After the outer ring of the large bearing is assembled in the mounting hole of the bracket, the inner ring of the large bearing needs to be equipped with a corresponding counterweight to apply an equivalent dynamic load to the bearing. In the existing test equipment, the counterweight configured on the inner ring acts on one axial side (i.e., one side) of the large bearing, and the mass of the counterweight is relatively large, often more than one ton. If the counterweight is set too high, the bearing will be overloaded relative to the bracket under the action of the bending moment, which will cause the connection between the bracket and the large bearing to fail.

[0056] Therefore, how to reduce the bending moment borne on one side of the bracket to make the testing process smooth, safe and reliable has become a technical problem that needs to be solved urgently.

[0057] The present disclosure provides a bearing test device, which is suitable for testing the rated life of a roller bearing. Figure 1 As shown, it includes a bracket 1, a rotating body 4 and a loading mechanism 5. The bracket 1 has a mounting hole, which is suitable for assembling the outer ring 21 of the bearing to be tested. The rotating body is coaxially assembled with the inner ring 22 of the bearing 2 and is configured to rotate synchronously with the inner ring 22 of the bearing 2. The loading mechanism 5 is configured to apply the same torque to both axial ends of the rotating body 4 and subject the inner ring 22 of the bearing 2 to a dynamic load extending in the radial direction.

[0058] According to the embodiments of the present disclosure, Figure 1 As shown, the test device further comprises a driving mechanism 7. The driving mechanism 7 is configured to drive the inner ring 22 of the bearing 2 to rotate about a fixed axis.

[0059] In an illustrative embodiment, Figure 1 As shown, the inner ring 22 of the bearing 2 is provided with an extended end 23 extending in the axial direction (as shown in FIG. Figure 2 The driving mechanism 7 includes but is not limited to a motor, a coupling, an electromagnetic brake and a reducer. The output shaft of the motor is connected to the electromagnetic brake and the reducer through a coupling, and the output end of the reducer is connected to the outer edge of the extension end through a multi-V belt, thereby driving the inner ring of the bearing to rotate relative to the outer ring.

[0060] In an illustrative embodiment, the drive mechanism 7 may also be configured with an encoder, and accordingly, a code disk may be provided on the extension end 23 of the bearing inner ring to be detected by the encoder, thereby detecting the rotation speed and / or rotation angle of the bearing inner ring in real time.

[0061] In an illustrative embodiment, Figure 1 and Figure 2 As shown, the test equipment also includes a turntable body 3. In detail, the outer edge of the turntable body 3 is connected to the inner ring 22 of the bearing 2 (including but not limited to being connected by a flange structure). Further, the rotating body 4 is arranged in the middle of the turntable body 3, and the bearing 2, the turntable body 3 and the rotating body 4 are configured to be substantially coaxial. Further, the axial ends of the rotating body 4 (such as Figure 2 The left end and the right end) should be configured to be located on both sides of the turntable body 3 respectively.

[0062] In an illustrative embodiment, Figure 2 As shown, the rotating body 4 is configured as a substantially axial structure. Specifically, the diameter of the middle portion connected to the turntable body 3 is configured to be larger than the diameters of the two axial ends, so that the portion where the rotating body 4 is connected to the turntable body 3 is thicker, thereby having a stronger structural strength. Further, the rotating body 4 and the turntable body 3 are connected including but not limited to welding, riveting, flange connection, integral formation, and any other methods.

[0063] In an illustrative embodiment, Figure 1 and Figure 2As shown, the loading mechanism 5 is respectively applied to the axial ends of the rotating body 4 (such as Figure 2 The left and right ends of the Figure 2 The downward force shown in FIG. 1 is a downward force shown in FIG. 1 , and the axial ends of the rotating body 4 are subjected to the same moment by designing the lever arm. It should be understood that the embodiments of the present disclosure are not limited thereto.

[0064] For example, the force applied by the loading mechanism 5 to the axial ends of the rotating body 4 may also be upward, or in other radial directions of the bearing 2 .

[0065] In such an embodiment, the rotating body 4 configured in the test equipment can be regarded as a lever structure. The rotating body 4 is configured to rotate synchronously with the inner ring 22 of the bearing 2, and the loading mechanism 5 is configured to apply the same torque to both ends of the axial direction of the rotating body 4, so that during the operation of the test equipment (i.e. when the inner ring 22 of the bearing 2 rotates relative to the outer ring 21), only the torque along the axis of the bearing 2 is applied. Figure 2 The dynamic load in the direction shown is downward, while the moments on both sides of the axial direction of the inner ring 22 of the bearing 2 are offset, and no bending moment is generated. In this way, during the test, the test equipment can operate stably, reliably and safely. In addition, since no bending moment is generated, the dynamic load applied to the bearing 2 in the radial direction is not limited by the strength of the connection between the bracket 1 and the outer ring 21 of the bearing 2. Therefore, a larger dynamic load can be applied, thereby greatly shortening the test time (which will be explained in detail below).

[0066] Figure 3 yes Figure 1 A perspective view of a loading mechanism of the exemplary embodiment shown.

[0067] According to the embodiments of the present disclosure, Figure 2 and Figure 3 As shown, the loading mechanism 5 includes a base 54, at least two first pulleys 51, a cable 52 and a pulling portion 53. The base 54 is disposed on the bracket 1. One of the other first pulleys 51 is rotatably sleeved at one end of the axial direction of the rotating body 4, and the other is rotatably sleeved at the other end of the axial direction of the rotating body 4. The cable 52 has a fixed end 521 and a free end 522. The fixed end 521 of the cable 52 is connected to the base 54, and the portion of the cable 52 between the fixed end 521 and the free end 522 is wound in the wheel grooves of the two first pulleys 51. The pulling portion 53 is connected to the free end 522 of the cable 52, and is configured to adjustably apply a pulling force along the length direction to the cable 52, so as to apply a torque along the radial direction of the rotating body 4 to the first pulley 51.

[0068] According to the embodiments of the present disclosure, Figure 2 and Figure 3As shown, the loading mechanism 5 further includes a second pulley block. The second pulley block is disposed on the base 54, and includes a plurality of second pulleys 56. The portion of the cable 52 between the fixed end 521 and the free end 522 is wound in the wheel groove of the second pulley 56. The second pulley block is configured to guide the cable 52 to change direction, so that the fixed end 521 and the free end 522 of the cable 52 extend in a radial direction parallel to the rotating body 4, and the portion of the cable 52 between the fixed end 521 and the free end 522 extends in an axial direction of the rotating body 4.

[0069] In an illustrative embodiment, Figure 2 and Figure 3 As shown, the base 54 is installed at the lower part of the bracket 1 and is perpendicular to the bracket 1 (such as Figure 3 In detail, both ends of the base 54 are provided by two sides of the bracket 1 (such as Figure 2 The left and right sides shown in the figure extend out and extend to the bottom of the rotating body 4.

[0070] In an illustrative embodiment, Figure 2 and Figure 3 As shown, first pulleys 51 are respectively installed at both ends of the axial direction of the rotating body 4. Further, a first connecting member 541 and a second connecting member 542 are respectively installed at a portion of the base 54 located below (may be directly below) the two first pulleys 51.

[0071] In an exemplary implementation, Figure 3 As shown, two pairs of second pulley groups are arranged on the base 54, and each second pulley group includes but is not limited to two second pulleys 56. In detail, one of the two second pulleys 56 in each group is arranged beside the first connecting member 541 (or the second connecting member 542) (specifically, it can be arranged side by side with the first connecting member 541 (or the second connecting member 542)), and the spacing between the second pulley 56 and the first connecting member 541 (or the second connecting member 542) can be configured to be substantially the same as the diameter of the wheel groove of the first pulley 51, so that the extension directions of the two ends of the cable 52 wound in the wheel groove of the first pulley 51 are parallel and perpendicular to the installation surface of the test equipment (such as the ground). In this way, under the action of the tension applied to the cable 52, the direction of the dynamic load borne by the bearing can be downward (that is, along the radial direction of the bearing 2), and basically has no components in other directions.

[0072] Furthermore, another second pulley 56 in the same group is disposed at the far end of the base 54 (i.e. Figure 3The cable 52 is wound around the second pulley 56 (see the lower right and lower left ends of the figure) to guide the wound cable 52 to the second pulley set on the other side of the base 54. The cable 52 is also wound around the wheel groove of the first pulley 51 on the other side and finally fixed to the second connecting member 542 (or the first connecting member 541). The radial direction of the first pulley 51 is perpendicular to the radial direction of the second pulley 56.

[0073] In an illustrative embodiment, Figure 2 and Figure 3 As shown, the fixed end 521 of the cable 52 is connected to the second connecting member 542 through a joint 57 (which may be indirectly connected through the detection assembly 6, which will be described below). Furthermore, the free end 522 of the cable 52 is connected to the first connecting member 541 through a joint 57 in a similar manner to the fixed end.

[0074] In an illustrative embodiment, Figure 3 As shown, the first connecting member 541 and the second connecting member 542 have similar structures, and can be formed into a roughly cubic structure using a plate, and are integrally installed on the base 54. The connection methods of the first connecting member 541 and the second connecting member 542 to the base 54 include but are not limited to welding, riveting, integral formation and any other methods. Among them, the first connecting member 541 and the second connecting member 542 both include side plates and top plates, and the fixed end 521 and the free end 522 of the cable 52 are both connected to the top plate of the first connecting member 541 (or the second connecting member 542), so that the fixed end 521 and the free end 522 of the cable 52 are perpendicular to the installation surface (such as the ground). Among them, the cable 52 includes but is not limited to the use of a steel wire rope, and the nominal diameter of the cable 52 should specifically meet the corresponding tension requirements (that is, to apply a suitable dynamic load to the bearing 2).

[0075] In an illustrative embodiment, Figure 2 and Figure 3 As shown, the traction part 53 includes but is not limited to a pull rod 531 and a nut 532. In detail, the free end 522 of the cable 52 is connected to the pull rod 531 through a joint 57, and the lower end of the pull rod 531 passes through the top plate of the first connecting member 541. The end of the pull rod 531 passing through the first connecting member 541 is provided with an external thread to be assembled with the nut 532, so as to be fixed to the top plate of the first connecting member 541. Since the nut 532 abuts against the top plate, the cable 52 can be tensioned in a directional manner by adjusting the position of the nut 532 relative to the pull rod 531.

[0076] According to the embodiments of the present disclosure, Figure 2 As shown, the two first pulleys 51 are at the same distance from the axial midpoint of the rotating body 4. The axial midpoint of the rotating body 4 can be configured to coincide with the center of the bearing 2.

[0077] In such an embodiment, when a dynamic load is applied to the bearing 2, a tensile force can be applied to the cable 52 along its length direction by screwing the nut 532. The tensile force applied to the cable 52 acts on the first pulley 51 after being reversed by the second pulley 56, so that the tensile force forms a dynamic load extending in the radial direction of the bearing 2. Since the force applied to the two first pulleys 51 is applied by the tensile force applied to the same cable 52, it can be ensured that the forces applied to the two first pulleys 51 are the same in real time, and there is no need for complicated counterweights and adjustments. In addition, since the two first pulleys 51 are at the same distance from the axial midpoint of the rotating body 4, they also have the same lever arm. In this way, the axial ends of the rotating body 4 can have the same torque.

[0078] On this basis, since the moments at both ends of the axial direction of the rotating body 4 are the same, when the test equipment is running, the two moments can be regarded as canceling each other. In this way, the dynamic load on the bearing 2 can be regarded as only in the radial direction, and the bearing 2 and / or the bracket 1 will not generate bending moments. Since the dynamic load applied to the bearing 2 is not limited by the strength of the connection between the bearing 2 and the bracket 1, the dynamic load can be increased accordingly (that is, the mounting surface can withstand the load) to shorten the test time.

[0079] Assume that bearing 2 is theoretically subjected to a dynamic load of 100,000 N (i.e., equivalent dynamic load, P r ), the rated life of bearing 2 (i.e. L10) is 5 years.

[0080] If the current single-side weighting method is adopted, when the weight at one axial end of the bearing 2 is 1 ton (which can generate an equivalent dynamic load of 100,000N), the bearing 2 needs to be operated continuously for 5 years.

[0081] In order to shorten the test time, the single-side counterweight of bearing 2 can be increased, such as 2 tons (which can generate an equivalent dynamic load of 200,000N). r / P r ) 3 In theory, the test time can be shortened to one eighth of the original test time (i.e., from 5 years to about 7.5 months). However, due to the bending moment generated by the unilateral counterweight, when bearing 2 is subjected to the dynamic load (i.e., equivalent dynamic load, P r ), the connection between the outer ring 21 of the bearing 2 and the bracket 1 assembled therewith will fail (e.g., break), so the dynamic load (i.e., the dynamic load corresponding to the 2-ton counterweight) cannot be applied. However, the test equipment using the above embodiment does not generate bending moment, so the dynamic load can be applied, thereby exponentially shortening the test time.

[0082] In addition, the first pulley 51 configured in the above embodiment can be regarded as a movable pulley, and the second pulley 56 in the second pulley group can be regarded as a fixed pulley. Based on the above configuration, when a tensile force is applied to the cable 52, the force on the first pulley 51 can be increased four times. In this way, while maintaining the original dynamic load, the tensile force applied by the traction part 53 to the cable 52 can be reduced. When the tensile force applied by the traction part 53 to the cable 52 is increased, the dynamic load on the bearing 2 can be increased four times, thereby further shortening the test time. It should be understood that the embodiments of the present disclosure are not limited to this.

[0083] Figure 4 is a perspective view of a loading mechanism according to another exemplary embodiment.

[0084] In another exemplary embodiment, Figure 4 As shown, the loading mechanism 5 may include two first pulley groups. Each first pulley group includes at least one first pulley 51.

[0085] In an illustrative embodiment, Figure 4 As shown, the two first pulley groups configured by the loading mechanism 5 may have other movable pulley structures in addition to the two movable pulleys (i.e., the first pulleys 51) as in the above embodiment. In detail, each first pulley group includes three movable pulleys (i.e., the first pulleys 51), two of which are coaxially arranged at one axial end of the rotating body 4, and the other movable pulley is located below the above two movable pulleys to guide the cable 52 to change direction, and further multiply the dynamic load on the rotating body 4 (i.e., the bearing) under the condition that the tension applied to the cable 52 is constant.

[0086] Figure 5 yes Figure 3 and Figure 4 A partial cross-sectional view of a portion of a buffer assembly is shown.

[0087] According to the embodiments of the present disclosure, Figures 2 to 5 As shown, the loading mechanism 5 further includes a buffer assembly 55 . The buffer assembly 55 is disposed on the base 54 and connected to the fixed end 521 of the cable 52 .

[0088] According to the embodiments of the present disclosure, Figures 2 to 5 As shown, the buffer assembly 55 includes at least one elastic member, one end of the elastic member is connected to the base 54 , and the other end of the elastic member is connected to the fixed end 521 of the cable 52 .

[0089] In an exemplary implementation, Figure 5As shown, a limit plate 543 is also provided on the top plate of the second connecting member 542. Specifically, the limit plate 543 is provided with a through hole, and a joint is inserted into the through hole. Further, an elastic member 55 is sleeved on the outer side of the joint, and the two ends of the elastic member 55 are respectively pressed between the limit plate 543 and the flange formed at the lower end of the joint, so that the joint (and the fixed end of the cable 52 connected to the joint) Figure 5 ) can be extended and retracted relative to the second connecting member 542 and reset under the elastic action of the elastic member 55.

[0090] In an illustrative embodiment, Figure 5 As shown, a plurality of elastic members 55 are stacked along the length direction of the joint and sleeved on the outside of the joint. In detail, the elastic member 55 includes but is not limited to a disc spring.

[0091] In such an embodiment, the buffer assembly 55 is suitable for allowing the fixed end of the cable 52 to have a certain amount of expansion and contraction relative to the second connecting member 542, so as to compensate for the difference in coaxiality of the first pulley 51 relative to the rotating body 4 and the bearing 2 when the test equipment is running, so as to prevent the cable 52 from being excessively pulled due to the coaxiality difference, thereby causing the cable 52 to be broken.

[0092] According to the embodiments of the present disclosure, Figures 2 to 5 As shown, the test further includes a detection assembly 6. The detection assembly 6 is connected to the cable 52 and is configured to detect the tension on the cable 52.

[0093] According to the embodiments of the present disclosure, Figures 2 to 5 As shown, the detection component 6 is disposed between the buffer component 55 and the fixed end 521 of the cable 52 .

[0094] In an illustrative embodiment, Figure 5 As shown, the detection component 6 includes but is not limited to a tension sensor (i.e., a tension meter). In detail, the tension sensor includes a force-bearing end and an output end. Further, the force-bearing end of the tension sensor is connected to the free end of the cable 52 through a connector 7, and the output end is connected to the buffer component 55 through a connector. The tension sensor is also configured with a cable to transmit the signal (such as an analog signal or a digital signal) generated at its output end to an external acquisition device (such as an acquisition card, a single-chip microcomputer, a PLC, a computer, and other devices with signal acquisition functions) and be acquired.

[0095] In such an embodiment, when the tension applied to the cable 52 is adjusted by the nut 532 of the pulling portion 53, the value of the tension can be obtained in real time by the detection component 6 (i.e., the tension sensor), thereby adjusting the dynamic load on the bearing 2 in real time and continuously. In addition, when the test equipment is running, the change of the dynamic load on the bearing 2 can also be obtained in real time by an external acquisition device.

[0096] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only for reference to the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0097] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A bearing test device, suitable for testing the rated life of a rolling bearing, characterized in that: include: A bracket (1) having a mounting hole, wherein the mounting hole is suitable for assembling an outer ring (21) of a bearing (2) to be tested; A rotating body (4) is coaxially mounted on the inner ring (22) of the bearing (2) and is configured to rotate synchronously with the inner ring (22) of the bearing (2); and The loading mechanism (5) is configured to apply the same torque to the axial ends of the rotating body (4) and to subject the inner ring (22) of the bearing (2) to a dynamic load extending in a radial direction.

2. The test device according to claim 1, characterized in that The loading mechanism (5) comprises: A base (54) is arranged on the bracket (1); At least two first pulleys (51), one of the first pulleys (51) being rotatably mounted on one axial end of the rotating body (4), and the other first pulley (51) being rotatably mounted on the other axial end of the rotating body (4); a cable (52) having a fixed end (521) and a free end (522), wherein the fixed end (521) of the cable (52) is connected to the base (54), and a portion of the cable (52) located between the fixed end (521) and the free end (522) is wound in the wheel grooves of the two first pulleys (51); and The pulling portion (53) is connected to the free end (522) of the cable (52) and is configured to adjustably apply a pulling force along the length direction to the cable (52) so as to apply a torque along the radial direction of the rotating body (4) to the first pulley (51).

3. The test device according to claim 2, characterized in that The two first pulleys (51) are spaced the same distance from the axial midpoint of the rotating body (4).

4. The test device according to claim 2 or 3, characterized in that: The loading mechanism (5) comprises two first pulley sets, each of which comprises at least one first pulley (51).

5. The test device according to claim 2 or 3, characterized in that: The loading mechanism (5) further comprises: a second pulley block, disposed on the base (54), the second pulley block comprising a plurality of second pulleys (56), the portion of the cable (52) located between the fixed end (521) and the free end (522) being wound in a wheel groove of the second pulley (56); The second pulley block is configured to guide the cable (52) to change direction, so that the fixed end (521) and the free end (522) of the cable (52) extend in a radial direction parallel to the rotating body (4), and the portion of the cable (52) located between the fixed end (521) and the free end (522) extends in an axial direction of the rotating body (4).

6. The test device according to claim 2 or 3, characterized in that: The loading mechanism (5) further comprises: A buffer assembly (55) is disposed on the base (54) and connected to the fixed end (521) of the cable (52).

7. The test device according to claim 6, characterized in that The buffer component (55) comprises: At least one elastic member, one end of the elastic member is connected to the base (54), and the other end of the elastic member is connected to the fixed end (521) of the cable (52).

8. The test device according to claim 6, characterized in that Also includes: A detection component (6) is connected to the cable (52) and is configured to detect the tension exerted on the cable (52).

9. The test device according to claim 8, characterized in that The detection component (6) is arranged between the buffer component (55) and the fixed end (521) of the cable (52).

10. The test device according to claim 1, characterized in that It also includes a driving mechanism (7) configured to drive the inner ring (22) of the bearing (2) to rotate.

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