Elastic ring stiffness test platform and elastic ring stiffness test method

Abstract

The invention relates to the technical field of elastic ring testing, in particular to an elastic ring stiffness testing platform and an elastic ring stiffness testing method. The outer bushing ring is installed on the base and provided with a containing cavity. The bearing part is partially located in the containing cavity, a containing groove is defined by the bearing part and the outer lining ring, and the containing groove is used for containing the elastic ring. The loading device is used for applying a load in the first direction to the bearing piece. The displacement sensor is used for directly measuring the elastic ring to obtain the deformation of the elastic ring. According to the embodiment of the invention, the elastic ring is clamped between the outer bushing ring and the bearing part, and the displacement sensor can directly measure the deformation of the elastic ring. In the process that the loading device applies a load, the outer lining ring and the bearing piece both deform to a certain degree. The loading device applies a load to the bearing part, and the displacement sensor can directly measure the deformation of the elastic ring, so that errors occurring in a rigidity test are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of elastic ring testing, and in particular to a testing platform for elastic ring stiffness and a testing method for elastic ring stiffness. Background Art

[0002] The elastic ring is a device that can suppress the vibration of the engine rotor. It has the characteristics of simple structure, light weight, and small space. It has been widely used in modern small and medium-sized aircraft engines, especially for high-speed rotating machinery. The elastic ring has a simple structure, light weight, high reliability, and good vibration reduction characteristics. Its stiffness has an important influence on the unbalanced response, vibration mode, critical speed, and transfer characteristics of the rotor system. Accurately obtaining the stiffness of the elastic ring is of great significance for analyzing the response characteristics of the rotor system.

[0003] In the related art, a large error may occur in the stiffness test of the elastic ring. Summary of the invention

[0004] The main purpose of the invention is to provide a testing platform and a testing method for the stiffness of an elastic ring, so as to reduce the error that may occur in the stiffness test of the elastic ring.

[0005] To achieve the above object, the present invention proposes a testing platform for elastic ring stiffness, comprising: Base; A loading device, mounted on the base, the loading device comprising a first sensor, the first sensor being used to measure the magnitude of a load applied by the loading device; An outer liner ring is mounted on the base, and the outer liner ring has a receiving cavity; A bearing member is partially located in the accommodating cavity, the bearing member and the outer liner ring are surrounded to form an accommodating groove, the accommodating groove is used to accommodate the elastic ring, and the loading device is used to apply a load along a first direction to the bearing member; The displacement sensor is used to directly measure the elastic ring to obtain the deformation of the elastic ring along the first direction.

[0006] The test platform according to the embodiment of the present application has at least the following beneficial effects: In the test platform of the embodiment of the present application, the loading device applies a load along the first direction to the bearing member, and the elastic ring is clamped between the outer liner ring and the bearing member to undergo elastic deformation, and the displacement sensor can directly measure the deformation of the elastic ring. Since the outer liner ring and the bearing member are both non-rigid during the actual test, the outer liner ring and the bearing member will both undergo a certain degree of deformation during the process of the loading device applying the load. The loading device applies a load to the bearing member, and the displacement sensor can directly measure the deformation of the elastic ring, thereby being able to obtain a more accurate amount of deformation of the elastic ring and reduce errors in stiffness testing.

[0007] In some embodiments, the first direction is arranged along a horizontal direction.

[0008] In some embodiments, the outer liner ring has a detection hole extending along the first direction, and the displacement sensor can pass through the detection hole to directly measure the elastic ring; Wherein, the detection hole is located on one side of the accommodating cavity along the first direction.

[0009] In some embodiments, the test platform further includes a supporting device, wherein the supporting device is used to support the bearing member, and the bearing member is located between the supporting device and the loading device along the first direction.

[0010] In some embodiments, the loading device applies a load to the first contact portion of the carrier, the supporting device is supported on the second contact portion of the carrier, and the second contact portion is located on a side of the first contact portion away from the accommodating cavity.

[0011] In some embodiments, the loading device further comprises: A first support mounted on the base; A driving member, mounted on the first support, the driving member is used to apply a load to the bearing member, the first sensor is mounted on the driving member, and the first sensor is used to measure the load applied by the driving member along the first direction; A loading member is connected to the first sensor, the loading member is sleeved on the supporting member, and the loading member extends along the first direction.

[0012] In some embodiments, the test platform further includes a supporting device, wherein the supporting device includes: A second support mounted on the base; A second sensor is installed on the second support, and the second sensor is used to measure the force applied to the second support; A support member is connected to the second sensor, the support member is sleeved on the bearing member, the support member is located on a side of the loading device away from the elastic ring, and the support member extends along the first direction.

[0013] In some embodiments, the bearing member includes an abutment member and a bearing beam connected to each other, the bearing beam extends along a second direction, the second direction is arranged crosswise with the first direction, the supporting device and the loading device are both connected to the bearing beam, the abutment member is located in the accommodating cavity, the abutment member and the outer lining ring are arranged to form an accommodating groove, the loading device is used to apply a load to the bearing beam along the first direction, and projected along the second direction, the projection area of ​​the bearing beam is located within the projection area of ​​the abutment member.

[0014] The present application also provides a test method for elastic ring stiffness, which is applied to any of the above test platforms, and the test method includes: Driving the loading device to apply a load along a first direction to the bearing member; Obtaining a deformation amount of the elastic ring along a first direction; Obtaining the force magnitude of the elastic ring along the first direction; The stiffness of the elastic ring is obtained based on the load applied by the loading device and the deformation of the elastic ring along the first direction.

[0015] In some embodiments, the step of obtaining the deformation amount of the elastic ring along the first direction includes: Moving the displacement sensor in a vertical direction to obtain deformation amounts in a first direction corresponding to a plurality of positions on the outer surface of the elastic ring; The step of obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the elastic ring along the first direction comprises: The stiffness of the elastic ring is obtained based on the load applied by the loading device and the deformation amount along the first direction corresponding to multiple positions of the outer surface of the elastic ring.

[0016] In some embodiments, the step of obtaining the deformation amount of the elastic ring along the first direction includes: Rotating the elastic ring to obtain deformation amounts corresponding to a plurality of positions on the outer surface of the elastic ring along a first direction; The step of obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the elastic ring along the first direction comprises: The stiffness of the elastic ring is obtained based on the load applied by the loading device and the deformation amount along the first direction corresponding to multiple positions of the outer surface of the elastic ring.

[0017] In some embodiments, before the step of driving the loading device to apply a load along the first direction to the bearing member, the testing method further includes: Driving the loading device to apply a preset load to the bearing member so that the elastic ring is clamped between the outer liner ring and the bearing member; The initial force magnitude of the elastic ring and the initial deformation of the elastic ring are obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A structural front view of a test platform according to an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of a test platform according to an embodiment of the present application; Figure 3 This is a schematic diagram of the assembly of a bearing member and an outer liner ring according to an embodiment of the present application, and a displacement sensor is shown in the figure; Figure 4 This is a schematic diagram of the assembly of an elastic ring and a bearing member according to an embodiment of the present application; Figure 5 A flow chart of a testing method according to an embodiment of the present application; Figure 6 A schematic diagram of a testing method according to an embodiment of the present application; Figure 7 FIG. 4 is a flow chart of a testing method according to an embodiment of the present application.

[0020] Description of Figure Numbers: 100, base; 200, loading device; 210, first sensor; 220, first support; 230, driving member; 231, belt assembly; 232, electric cylinder; 240, loading member; 250, auxiliary member; 300, outer lining ring; 300a, accommodating cavity; 300b, detection hole; 400, bearing member; 400a, accommodating groove; 400b, first contact portion; 400c, second contact portion; 410, abutment member; 420, bearing beam; 500, elastic ring; 500a, boss; 600, displacement sensor; 700, motor; 800, supporting device; 810, second support; 820, second sensor; 830, supporting member.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0024] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0027] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "top", "bottom", "upper", and "lower" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated, or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0030] In the related art, the test platform usually fixes the inner ring and pressurizes the outer ring through the loading module, so that the elastic ring located between the inner ring and the outer ring is clamped between the inner ring and the outer ring. The measurement module abuts against the outer ring to measure the deformation of the elastic ring. The stiffness of the elastic ring is then calculated by the ratio of load to deformation. However, since the inner ring and the outer ring are non-rigid during the actual test, it is difficult to truly reflect the deformation of the elastic ring by measuring the displacement of the outer ring, so the calculated stiffness has a certain error.

[0031] In the embodiment of the present application, the loading device 200 applies a load to the bearing member 400, and the displacement sensor 600 can directly measure the deformation of the elastic ring 500. The deformation of the elastic ring 500 is measured more accurately, so that the stiffness error of the elastic ring 500 is small.

[0032] This application provides a testing platform for elastic ring stiffness, please refer to Figures 1 to 4 The test platform includes a base 100, a loading device 200, an outer liner ring 300, a bearing member 400 and a displacement sensor 600. The loading device 200 is installed on the base 100, and the loading device 200 includes a first sensor 210. The first sensor 210 is used to measure the load applied by the loading device 200. The outer liner ring 300 is installed on the base 100, and the outer liner ring 300 has a receiving cavity 300a. The bearing member 400 is partially located in the receiving cavity 300a, and the bearing member 400 and the outer liner ring 300 are surrounded to form a receiving groove 400a. The receiving groove 400a is used to accommodate the elastic ring 500, and the loading device 200 is used to apply a load along a first direction to the bearing member 400. The displacement sensor 600 is used to directly measure the elastic ring 500 to obtain the deformation of the elastic ring 500 along the first direction.

[0033] It should be noted that the first direction refers to a unidirectional direction. For example, when the loading device 200 applies a tensile force, the first direction is the direction from the carrier 400 to the loading device 200. When the loading device 200 applies a thrust force, the first direction is the direction from the loading device 200 to the carrier 400.

[0034] Direct measurement of the elastic ring 500 by the displacement sensor 600 means that the measurement object of the displacement sensor 600 is the elastic ring 500, and the deformation of the elastic ring 500 can be directly obtained through the reading of the displacement sensor 600 without conversion or equivalent replacement.

[0035] For example, the first direction is Figure 1 As indicated by the middle arrow R1 , the first direction in the figure is the direction in which the loading device 200 applies the pulling force.

[0036] Exemplarily, the first sensor 210 is a force sensor, and the pulling force or pushing force applied by the loading device 200 to the bearing member 400 can be obtained through the first sensor 210. The emission source of the displacement sensor 600 can measure the distance between the elastic ring 500 and the emission source through the detection hole 300b, thereby obtaining the deformation of the elastic ring 500 along the first direction.

[0037] Understandably, see Figure 4 The elastic ring 500 is usually formed with a plurality of bosses 500a on the inner and outer surfaces. The plurality of bosses 500a are arranged at intervals along the central axis of the elastic ring 500. The bosses 500a on the outer surface abut against the inner surface of the outer liner ring 300. When the loading device 200 applies a load to the bearing member 400, the bosses 500a are squeezed and deformed. The displacement sensor 600 can measure the outer surface of the elastic ring 500 through the detection hole 300b, thereby obtaining the deformation of the elastic ring 500.

[0038] In the solution of the embodiment of the present application, the loading device 200 applies a load along the first direction to the bearing member 400, and the elastic ring 500 is clamped between the outer liner ring 300 and the bearing member 400 to undergo elastic deformation, and the displacement sensor 600 can directly measure the deformation of the elastic ring 500. Since the outer liner ring 300 and the bearing member 400 are both non-rigid during the actual test, the outer liner ring 300 and the bearing member 400 will both undergo a certain degree of deformation during the process of the loading device 200 applying the load. The loading device 200 applies a load to the bearing member 400, and the displacement sensor 600 can directly measure the deformation of the elastic ring 500, thereby being able to obtain a relatively accurate amount of deformation of the elastic ring 500 and reduce the error in the stiffness test.

[0039] In one embodiment, please refer to Figure 1 , the first direction is arranged along the horizontal direction.

[0040] Exemplarily, the base 100 is placed on a horizontal plane, and the loading device 200 and the carrier 400 are arranged substantially in a horizontal direction.

[0041] In the solution of the embodiment of the present application, the first direction is arranged along the horizontal direction. During the test, the influence of the gravity of the bearing member 400 and the elastic ring 500 on the force and deformation can be reduced, so that the test result is more accurate.

[0042] It is understandable that the embodiments of the present application are not limited to the first direction being arranged along the horizontal direction. Exemplarily, the first direction is arranged crosswise with the horizontal direction.

[0043] In one embodiment, please refer to Figure 3 The outer liner ring 300 has a detection hole 300b extending along the first direction, and the displacement sensor 600 can pass through the detection hole 300b to directly measure the elastic ring 500. The elastic ring 500 can pass through the detection hole 300b, thereby being partially directly exposed to the outside world, so that the displacement sensor 600 can measure the deformation of the elastic ring 500 through the detection hole 300b.

[0044] In one embodiment, please refer to Figure 3 The detection hole 300b is located on one side of the accommodating cavity 300a along the first direction.

[0045] Exemplarily, when the loading device 200 applies a pulling force, the detection hole 300 b is located on the side of the elastic ring 500 facing the loading device 200 . When the loading device 200 applies a pushing force, the detection hole 300 b is located on the side of the elastic ring 500 facing away from the loading device 200 .

[0046] In the solution of the embodiment of the present application, the detection hole 300b is located on one side of the accommodating cavity 300a along the first direction. Since the elastic ring 500 as a whole will be deformed to a certain extent when subjected to a load along the first direction, the extrusion of one end of the elastic ring 500 toward the first direction can more directly reflect the deformation of the elastic ring 500, and the rest of the elastic ring 500 may expand to a certain extent, and the detected deformation may be smaller. The displacement sensor 600 can more accurately obtain the deformation of the elastic ring 500 along the first direction, thereby obtaining a more accurate stiffness. In the process of conducting simulation tests, the applicant obtained test results that are relatively close to theoretical data.

[0047] It is understood that the embodiment of the present application is not limited to the elastic ring 500 being arranged along the first direction toward the detection hole 300b. Exemplarily, the direction of the elastic ring 500 toward the detection hole 300b is parallel to and opposite to the first direction.

[0048] In one embodiment, please refer to Figure 1 and Figure 2 The test platform further includes a supporting device 800, which is used to support the carrier 400, and the carrier 400 is located between the supporting device 800 and the loading device 200 along the first direction.

[0049] In the solution of the embodiment of the present application, the carrier 400 is located between the support device 800 and the loading device 200 along the first direction. When the loading device 200 applies a load to the carrier 400, the support device 800 can support the carrier 400 to reduce the overturning of the carrier 400.

[0050] In one embodiment, please refer to Figure 1 and Figure 2 The loading device 200 applies a load to the first contact portion 400b of the carrier 400, and the supporting device 800 is supported on the second contact portion 400c of the carrier 400, where the second contact portion 400c is located on a side of the first contact portion 400b away from the accommodating cavity 300a.

[0051] In the solution of the embodiment of the present application, the second contact portion 400c is located on the side of the first contact portion 400b away from the accommodating cavity 300a. When the load applied by the loading device 200 is constant, the farther the position where the supporting device 800 contacts the carrier 400 is from the first contact portion 400b, the smaller the load on the supporting device 800 is, so that the supporting device 800 can better support the carrier 400, and the carrier 400 is more stable.

[0052] It is understandable that the embodiment of the present application is not limited to the second contact portion 400c being located on the side of the first contact portion 400b away from the accommodation cavity 300a. Exemplarily, the second contact portion 400c is located between the first contact portion 400b and the accommodation cavity 300a.

[0053] In one embodiment, please refer to Figure 1 and Figure 2 The loading device 200 further includes a first support 220, a driving member 230 and a loading member 240. The first support 220 is mounted on the base 100. The driving member 230 is mounted on the first support 220, and the driving member 230 is used to apply a load to the bearing member 400. The first sensor 210 is mounted on the driving member 230, and the first sensor 210 is used to measure the load applied by the driving member 230 along the first direction. The loading member 240 is connected to the first sensor 210, and the loading member 240 is sleeved on the bearing member 400, and the loading member 240 extends along the first direction.

[0054] The first support 220 refers to a device for supporting the driving member 230 and the loading member 240, so that the driving member 230 and the loading member 240 can be fixed relative to the base 100. Exemplarily, the first support 220 is installed on the base 100 by bolts and nuts.

[0055] For example, see Figure 1 and Figure 2 The loading device 200 further includes an auxiliary member 250, which is connected to the first support 220, the bottom of which is in contact with the base 100, and the driving member 230 is disposed on the top surface of the auxiliary member 250, and the auxiliary member 250 is located on the side of the first support 220 facing the driving member 230. The auxiliary member 250 is used to support the driving member 230, thereby reducing the bending moment of the first support 220, and the first support 220 can be installed on the base 100 more stably.

[0056] Exemplarily, the loader 240 contacts the first contact portion 400 b .

[0057] In the solution of the embodiment of the present application, the first support 220 can serve as the base of the loading device 200, so that the driving member 230 and the loading member 240 in the loading device 200 can remain stable during the test. Furthermore, the loading member 240 is partially sleeved on the bearing member 400 to increase the contact area between the loading member 240 and the bearing member 400, so that when the load transmitted by the loading member 240 is constant, the magnitude of the pressure on the bearing member 400 is reduced, and the damage or local deformation of the bearing member 400 is reduced.

[0058] It is understandable that the embodiment of the present application does not limit the structure of the loading device 200. Exemplarily, the fixed end of the driving member 230 is directly mounted on the base 100.

[0059] In one embodiment, please refer to Figure 1 The driving member 230 includes an electric cylinder 232, a belt assembly 231 and a motor 700. The belt assembly 231 is connected to the electric cylinder 232 and the motor 700 respectively, and the motor 700 drives the belt assembly 231 to rotate, thereby driving the electric cylinder 232 to apply a load to the bearing member 400.

[0060] Exemplarily, the electric cylinder 232 is mounted on the auxiliary component 250 by means of a side flange through bolts and nuts.

[0061] In the solution of the embodiment of the present application, the loading device 200 controls the electric cylinder 232 through the motor 700 to control the loading member 240 to apply a load to the bearing member 400. The motor 700 can make the load applied by the driving member 230 to the bearing member 400 remain basically consistent during multiple tests. The smaller the variation between multiple tests, the more accurate the measurement results.

[0062] It is to be understood that the embodiments of the present application do not limit the manner of applying the load.

[0063] Exemplarily, the driving member 230 further includes a controller, which is used to control the motor 700. The controller can be set by an operator so that the electric cylinder 232 can apply a load to the bearing member 400 according to the set load.

[0064] Exemplarily, the controller is a PLC (Programmable Logic Controller).

[0065] In one embodiment, the test platform further includes a support device 800, and the support device 800 includes a second support 810, a second sensor 820, and a support member 830. The second support 810 is installed on the base 100. The second sensor 820 is installed on the second support 810, and the second sensor 820 is used to measure the force of the second support 810. The support member 830 is connected to the second sensor 820, and the support member 830 is sleeved on the bearing member 400. The support member 830 is located on the side of the loading device 200 away from the elastic ring 500, and the support member 830 extends along the first direction.

[0066] Exemplarily, the support member 830 contacts the second contact portion 400 c .

[0067] Exemplarily, the support member 830 is located on a side of the loading member 240 away from the elastic ring 500 along the second direction.

[0068] The second sensor 820 is a force sensor.

[0069] Exemplarily, along the first direction, the second sensor 820 is located between the second support 810 and the support member 830 .

[0070] Exemplarily, the formula for calculating the stiffness of the elastic ring 500 is:

[0071] In the formula, is the stiffness of the elastic ring 500; The load applied to the driving member 230; is the load borne by the support member 830; is the deformation amount of the elastic ring 500.

[0072] Understandably, It can be measured by the first sensor 210. It can be measured by the second sensor 820. It can be measured by the displacement sensor 600.

[0073] In the solution of the embodiment of the present application, the support member 830 is located on the side of the loading member 240 away from the elastic ring 500 to support the bearing member 400. In the process of the loading device 200 applying a load to the bearing member 400, the support device 800 can support the bearing member 400 to reduce the overturning of the bearing member 400. Furthermore, the support member 830 extends along the first direction to support the bearing member 400, which can reduce the force on the bearing member 400 in other directions, and calculates the force through the second sensor 820, thereby obtaining the force on the bearing member 400 in the first direction.

[0074] It is understandable that the embodiments of the present application do not limit the structure of the support device 800. Exemplarily, the support device 800 supports the bearing member 400 along the length direction of the bearing member 400, thereby preventing the bearing member 400 from tipping over.

[0075] Exemplarily, along the second direction, a polished surface is formed on the surface of the bearing member 400 facing the outer liner ring 300 and / or on the surface of the outer liner ring 300 facing the bearing member 400. The polished surface can reduce the friction between the bearing member 400 and the outer liner ring 300, and the smaller friction between the bearing member 400 and the outer liner ring 300 along the first direction can reduce the impact on the accuracy of the test data.

[0076] In one embodiment, please refer to Figure 2 The bearing member 400 includes an abutment member 410 and a bearing beam 420 that are interconnected. The bearing beam 420 extends along the second direction. The second direction is arranged crosswise with the first direction. The abutment member 410 is located in the accommodating cavity 300a. The abutment member 410 and the outer liner ring 300 are surrounded to form an accommodating groove 400a. The loading device 200 is used to apply a load along the first direction to the bearing beam 420. When projected along the second direction, the projection area of ​​the bearing beam 420 is located within the projection area of ​​the abutment member 410.

[0077] Exemplarily, the second direction is arranged along the vertical direction.

[0078] Exemplarily, the abutment 410 is fixedly connected to the load beam 420. The abutment 410 is in the shape of a disk, and the load beam 420 is in the shape of a cylinder or a square column. The central axis of the load capacity overlaps with the central axis of the abutment 410. The elastic ring 500 is arranged around the circumference of the abutment 410.

[0079] In the scheme of the embodiment of the present application, the projection area of ​​the load-bearing beam 420 is located within the projection area of ​​the abutment 410, that is, the cross-sectional area of ​​the load-bearing beam 420 is smaller than the cross-sectional area of ​​the abutment 410. The smaller volume of the load-bearing member 400 can reduce the space occupied by the load-bearing member 400, and the manufacturing cost of the test platform is lower.

[0080] It is understandable that the embodiments of the present application are not limited to the projection along the second direction, where the projection area of ​​the load-bearing beam 420 is located within the projection area of ​​the abutment 410. Exemplarily, along the second direction, the projection area of ​​the load-bearing beam 420 overlaps with the projection area of ​​the abutment 410, or the projection area of ​​the load-bearing beam 420 is partially located outside the projection area of ​​the abutment 410.

[0081] In one embodiment, the outer diameter of the elastic ring 500 is smaller than the inner diameter of the accommodating cavity 300 a .

[0082] Exemplarily, the elastic ring 500 is clearance-fitted with the outer liner ring 300 and the bearing member 400 .

[0083] In the solution of the embodiment of the present application, the outer diameter of the elastic ring 500 is smaller than the inner diameter of the accommodating cavity 300a, and the elastic ring 500 and the accommodating cavity 300a are clearance-fitted, and the elastic ring 500 is not subjected to force in the first direction when it is not subjected to external load. Usually, the stiffness test of the elastic ring 500 is performed when the elastic ring 500 has not reached the proportional limit, and the elastic ring 500 is not subjected to force in the first direction in the initial state, that is, it is difficult for the elastic ring 500 to reach the proportional limit during the test, so that the elastic ring 500 can withstand a larger load of the loading device 200 during the test, and the test result is more accurate.

[0084] It is understood that the embodiments of the present application are not limited to the outer diameter of the elastic ring 500 being smaller than the inner diameter of the accommodating cavity 300a. For example, the outer diameter of the elastic ring 500 is larger than the inner diameter of the accommodating cavity 300a, and the elastic ring 500 is elastically deformed and clamped between the outer liner ring 300 and the bearing member 400 before the test.

[0085] This application also provides a method for testing the stiffness of the elastic ring 500, please refer to Figures 5 to 7 , applied to any of the above test platforms, the test method includes: Step S1: driving the loading device to apply a load along a first direction to the bearing member; Step S2: obtaining the deformation amount of the elastic ring along the first direction; Step S3: obtaining the force magnitude of the elastic ring along the first direction; Step S4: obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the elastic ring along the first direction.

[0086] It is understandable that the deformation of the elastic ring 500 along the first direction can be measured by the displacement sensor 600 through the detection hole 300b of the outer liner ring 300. The displacement sensor 600 calculates the deformation by measuring the distance between the outer surface of the elastic ring 500 and the displacement sensor 600 before and after the force is applied.

[0087] It is understandable that the magnitude of the force applied to the elastic ring 500 along the first direction can be directly obtained by the first sensor 210. When the test platform is provided with a supporting device 800 for supporting the bearing member 400 along the first direction, the magnitude of the force applied to the elastic ring 500 can be obtained by the load applied by the loading device 200 and the load borne by the supporting device 800.

[0088] In the solution of the embodiment of the present application, the load is applied to the bearing member 400 by the loading device 200, and the deformation of the elastic ring 500 is detected by the displacement sensor 600. Since the outer liner ring 300 and the bearing member 400 are both non-rigid during the actual test, the outer liner ring 300 and the bearing member 400 will both deform to a certain extent during the process of the loading device 200 applying the load. The loading device 200 applies the load to the bearing member 400, and the displacement sensor 600 can directly measure the deformation of the elastic ring 500 through the detection hole 300b, so that a relatively accurate amount of deformation of the elastic ring 500 can be obtained, reducing the error in the stiffness test.

[0089] In one embodiment, please refer to Figure 6 , the step of obtaining the deformation amount of the elastic ring 500 along the first direction includes: Step S20: moving the displacement sensor in the vertical direction to obtain deformation amounts in the first direction corresponding to a plurality of positions on the outer surface of the elastic ring; Based on the load applied by the loading device 200 and the deformation of the elastic ring 500 along the first direction, the step of obtaining the stiffness of the elastic ring 500 includes: Step S40: Obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation amounts along the first direction corresponding to a plurality of positions on the outer surface of the elastic ring.

[0090] It can be understood that when the loading device 200 applies a load in the horizontal direction to the bearing member 400 , under the condition that the load magnitudes are the same, the deformations generated at the test positions arranged in the vertical direction are substantially the same.

[0091] Exemplarily, the displacement sensor 600 is moved in the vertical direction to obtain the deformation of at least three elastic rings 500 in the first direction. Through multiple test data, multiple data points can be obtained in the coordinate system of the deformation of the elastic ring 500 and the force magnitude, and the multiple data points are fitted to obtain the stiffness of the elastic ring 500. The stiffness of the elastic ring 500 obtained by fitting can reduce the error to a certain extent, and the obtained stiffness data is more accurate.

[0092] In one embodiment, please refer to Figure 7 , the step of obtaining the deformation amount of the elastic ring 500 along the first direction includes: Step S21: rotating the elastic ring to obtain deformation amounts corresponding to a plurality of positions on the outer surface of the elastic ring along a first direction; Based on the load applied by the loading device 200 and the deformation of the elastic ring 500 along the first direction, the step of obtaining the stiffness of the elastic ring 500 includes: Step S41: Obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation amounts corresponding to a plurality of positions on the outer surface of the elastic ring along the first direction.

[0093] In the solution of the embodiment of the present application, multiple stiffness values ​​of the elastic ring 500 can be obtained by rotating the elastic ring 500. Taking the average value of the multiple stiffness values ​​can obtain a more accurate stiffness value of the elastic ring 500.

[0094] Exemplarily, the elastic ring 500 includes a plurality of measuring areas, which are arranged at intervals along the circumference of the elastic ring 500 . By rotating the elastic ring 500 , different measuring areas can be aligned with the displacement sensor 600 , so that the displacement sensor 600 can test the plurality of measuring areas.

[0095] Exemplarily, the measurement area includes multiple measurement points, which are arranged at intervals in the vertical direction. By moving the displacement sensor 600 in the vertical direction, the displacement sensor 600 can be aligned with different measurement points, thereby testing different measurement points to obtain the deformation of multiple elastic rings 500 along the first direction.

[0096] In one embodiment, please refer to Figure 5 Before the step of driving the loading device 200 to apply a load along the first direction to the bearing member 400, the testing method further includes: Step S11: driving the loading device to apply a preset load to the bearing member so that the elastic ring is clamped between the outer liner ring and the bearing member; Step S12: obtaining the initial force magnitude of the elastic ring and the initial deformation of the elastic ring.

[0097] Exemplarily, the elastic ring 500 is clearance-fitted with the bearing member 400 and the outer liner ring 300 . Before the loading device 200 applies a load to the bearing member 400 , no interaction force is generated between the elastic ring 500 , the bearing member 400 , and the outer liner ring 300 .

[0098] For example, when the loading device 200 applies a preset load to the carrier 400, the reading of the first sensor 210 is , the reading of the second sensor 820 is , the reading of displacement sensor 600 is Then, the formula for calculating the stiffness of the elastic ring 500 is:

[0099] In the solution of the embodiment of the present application, the elastic ring 500, the bearing member 400 and the outer liner ring 300 do not generate interaction force when not under load. A preset load is applied to the bearing member 400 before the experimental test to compress the elastic ring 500. Before recording the data, the elastic ring 500 is in a compressed state. During the test, the relationship between the force and the deformation is more accurate. This reduces the situation in which the elastic ring 500 does not deform under force in the early stage of the test.

[0100] In one embodiment, the step of obtaining the deformation amount of the elastic ring 500 along the first direction includes: Step S22: increasing the load applied by the loading assembly in stages to obtain deformation amounts of the plurality of elastic rings along the first direction; The step of obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the elastic ring along the first direction includes: Step S42: obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the plurality of elastic rings along the first direction.

[0101] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of protection.

Claims

1. A testing platform for elastic ring stiffness, characterized in that: include: Base; A loading device, mounted on the base, the loading device comprising a first sensor, the first sensor being used to measure the magnitude of a load applied by the loading device; An outer liner ring is mounted on the base, and the outer liner ring has a receiving cavity; A bearing member is partially located in the accommodating cavity, the bearing member and the outer liner ring are surrounded to form an accommodating groove, the accommodating groove is used to accommodate the elastic ring, and the loading device is used to apply a load along a first direction to the bearing member; The displacement sensor is used to directly measure the elastic ring to obtain the deformation of the elastic ring along the first direction.

2. The test platform according to claim 1, characterized in that: The first direction is arranged along a horizontal direction.

3. The test platform according to claim 1, characterized in that: The outer liner ring has a detection hole extending along a first direction, and the displacement sensor can pass through the detection hole to directly measure the elastic ring; Wherein, the detection hole is located on one side of the accommodating cavity along the first direction.

4. The test platform according to any one of claims 1 to 3, characterized in that: The test platform further comprises a supporting device, wherein the supporting device is used to support the bearing member, and the bearing member is located between the supporting device and the loading device along the first direction.

5. The test platform according to claim 4, characterized in that: The loading device applies a load to the first contact portion of the carrier, and the supporting device is supported on the second contact portion of the carrier, where the second contact portion is located on a side of the first contact portion away from the accommodating cavity.

6. The test platform according to claim 4, characterized in that: The loading device also includes: A first support mounted on the base; A driving member, mounted on the first support, the driving member is used to apply a load to the bearing member, the first sensor is mounted on the driving member, the first sensor is used to measure the load applied by the driving member along the first direction; A loading member is connected to the first sensor, the loading member is sleeved on the supporting member, and the loading member extends along the first direction.

7. The test platform according to claim 4, characterized in that: The test platform also includes a supporting device, which includes: A second support mounted on the base; A second sensor is installed on the second support, and the second sensor is used to measure the force applied to the second support; A support member is connected to the second sensor, the support member is sleeved on the bearing member, the support member is located on a side of the loading device away from the elastic ring, and the support member extends along the first direction.

8. The test platform according to claim 4, characterized in that: The bearing member includes an abutment member and a bearing beam that are connected to each other. The bearing beam extends along a second direction, and the second direction is arranged crosswise with the first direction. The supporting device and the loading device are both connected to the bearing beam. The abutment member is located in the accommodating cavity. The abutment member and the outer lining ring are surrounded to form an accommodating groove. The loading device is used to apply a load to the bearing beam along the first direction. When projected along the second direction, the projection area of ​​the bearing beam is located within the projection area of ​​the abutment member.

9. A method for testing the stiffness of an elastic ring, characterized in that: Applied to the test platform according to any one of claims 1 to 8, the test method comprises: Driving the loading device to apply a load along a first direction to the bearing member; Obtaining a deformation amount of the elastic ring along a first direction; Obtaining the force magnitude of the elastic ring along the first direction; The stiffness of the elastic ring is obtained based on the load applied by the loading device and the deformation of the elastic ring along the first direction.

10. The testing method according to claim 9, characterized in that: The step of obtaining the deformation amount of the elastic ring along the first direction comprises: Moving the displacement sensor in a vertical direction to obtain deformation amounts in a first direction corresponding to a plurality of positions on the outer surface of the elastic ring; The step of obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the elastic ring along the first direction comprises: The stiffness of the elastic ring is obtained based on the load applied by the loading device and the deformation amount along the first direction corresponding to multiple positions of the outer surface of the elastic ring.

11. The testing method according to claim 9, characterized in that: The step of obtaining the deformation amount of the elastic ring along the first direction comprises: Rotating the elastic ring to obtain deformation amounts corresponding to a plurality of positions on the outer surface of the elastic ring along a first direction; The step of obtaining the stiffness of the elastic ring based on the load applied by the loading device and the deformation of the elastic ring along the first direction comprises: The stiffness of the elastic ring is obtained based on the load applied by the loading device and the deformation amount along the first direction corresponding to multiple positions of the outer surface of the elastic ring.

12. The testing method according to claim 9, characterized in that: Before the step of driving the loading device to apply a load along the first direction to the bearing member, the testing method further comprises: Driving the loading device to apply a preset load to the bearing member so that the elastic ring is clamped between the outer liner ring and the bearing member; The initial force magnitude of the elastic ring and the initial deformation of the elastic ring are obtained.

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