Elastic ring radial play fatigue test device and fatigue test method thereof

Abstract

The invention relates to the technical field of fatigue test, in particular to an elastic ring radial play fatigue test device and a fatigue test method thereof. An elastic ring radial play fatigue test device applied to the elastic ring radial play fatigue test method comprises a loading mechanism, a driving mechanism and a heating furnace, the loading mechanism comprises at least one set of loading structures sequentially connected in the axial direction of an elastic ring, and each set of loading structure comprises two loading assemblies oppositely connected in the radial direction of the elastic ring; the two loading assemblies jointly clamp and fix the elastic ring, the driving mechanism can synchronously drive the input ends of all the loading assemblies to eccentrically rotate around a preset shaft, and the offset of the central axes of the input ends of the two loading assemblies in the same loading structure relative to the preset shaft is equal and the offset directions are opposite. The offset of the central axis of the input end of the loading assembly relative to the preset shaft is the radial displacement of the elastic ring, and the heating furnace is provided with a heating cavity used for containing and heating the loading mechanism and the elastic ring.

Description

Technical Field

[0001] The invention relates to the technical field of fatigue testing, in particular to an elastic ring radial movement fatigue testing device and a fatigue testing method thereof. Background Art

[0002] In the aviation field, for the connection between the engine and the flight equipment, an elastic ring needs to be installed on the output end of the engine. Since radial vibration will be generated during the actual operation of the engine, the elastic ring installed on the output shaft of the engine will be affected by the engine and produce slight deformation in the radial direction. The long-term reciprocating deformation of the elastic ring can easily cause fatigue damage to the elastic ring. In addition, the operation stability of the engine is relatively high when it is working. In a high temperature environment, the service life of the elastic ring will also be greatly reduced due to the influence of high temperature. In order to verify the reliability of the elastic ring under high temperature conditions, targeted tests are required to provide test data support for subsequent research and development improvements.

[0003] Therefore, it is urgent to invent an elastic ring radial movement fatigue test device and a fatigue test method thereof to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an elastic ring radial movement fatigue test device and a fatigue test method thereof, so as to truly simulate the working environment of the elastic ring, simulate the radial movement of the elastic ring during actual work, and provide data support for subsequent research and development.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Elastic ring radial movement fatigue test device, including:

[0007] The loading mechanism comprises at least one group of loading structures connected in sequence along the axial direction of the elastic ring, each group of the loading structures comprises two loading components connected opposite to each other along the radial direction of the elastic ring, and the two loading components are clamped and fixed to the elastic ring along the radial direction of the elastic ring by the center of the elastic ring; and

[0008] A driving mechanism, wherein the output end of the driving mechanism is connected to the input ends of all the loading assemblies, and the driving mechanism can synchronously drive the input ends of all the loading assemblies to rotate eccentrically around a preset axis, the central axes of the two loading assembly input ends in the same group of the loading structures are offset from the preset axis by the same amount, and the central axes of the two loading assembly input ends are offset in opposite directions relative to the preset axis, and the offset of the central axis of the loading assembly input end relative to the preset axis is the radial play of the elastic ring; and

[0009] A heating furnace is provided with a heating chamber for accommodating and heating the loading mechanism and the elastic ring.

[0010] As an optional solution, the loading component includes:

[0011] A transmission crankshaft, wherein the input end of the transmission crankshaft is connected to the output end of the driving mechanism, and the driving mechanism is capable of driving the input end of the transmission crankshaft to rotate around the preset axis and driving the output end of the transmission crankshaft to rotate eccentrically around the preset axis;

[0012] a connecting rod connected to the output end of the transmission crankshaft, wherein the output end of the transmission crankshaft can drive the connecting rod to move radially along the elastic ring, and the radial movement distance of the connecting rod along the elastic ring is the offset of the central axis of the transmission crankshaft relative to the preset axis; and

[0013] A plug rod, one end of which is rotatably connected to the connecting rod, and the other end of which is clamped and fixed with the elastic ring.

[0014] As an optional solution, the loading mechanism further includes:

[0015] An installation frame, the installation frame includes a first plate body and a second plate body that are interlocked with each other, the transmission crankshaft is rotatably connected to the first plate body or the second plate body, the loading assembly also includes a sliding guide structure, the sliding guide structure is fixed between the first plate body and the second plate body, the sliding guide structure is sleeved on the outer periphery of the plug rod, and the sliding guide structure can provide guidance for the movement of the plug rod.

[0016] As an optional solution, the sliding guide structure includes:

[0017] a first bearing, sleeved on the outer circumference of the plug rod, the first bearing being able to move relative to the plug rod along the axial direction of the plug rod; and

[0018] A first bearing seat and a first bearing cover, wherein the first bearing seat is fixed to the first bearing cover, the first bearing is arranged between the first bearing seat and the first bearing cover, and the first bearing seat is respectively installed and fixed to the first plate body and the second plate body.

[0019] As an optional solution, each group of the loading structures further includes:

[0020] A clamping assembly is connected to the loading assembly and is used to clamp and fix the elastic ring.

[0021] As an optional solution, the clamping assembly includes:

[0022] A tensioning sleeve, the tensioning sleeve being capable of tensioning the elastic ring in a radial direction of the elastic ring; and

[0023] A fixing part, each of the loading components is arranged corresponding to a fixing part, and the fixing part can install and fix the tensioning sleeve and the corresponding loading component.

[0024] As an optional solution, a positioning groove is axially arranged on the outer peripheral wall of the tensioning sleeve, and the positioning groove is used to accommodate the elastic ring.

[0025] As an optional solution, each group of the loading structures further includes:

[0026] The connecting assembly comprises an isolation gasket and a connecting piece, wherein the isolation gasket is clamped between the two groups of the loading assemblies along the axial direction of the elastic ring, and the connecting piece can install and fix the two groups of the loading assemblies along the axial direction of the elastic ring.

[0027] As an optional solution, the connection component further includes:

[0028] The positioning member is provided with positioning holes at both end surfaces of the two groups of loading assemblies close to each other. When the two groups of loading assemblies are connected and fixed along the elastic ring, the positioning member is simultaneously accommodated in the two positioning holes.

[0029] The elastic ring radial movement fatigue test method is applied to the elastic ring radial movement fatigue test device as described above, and comprises the following steps:

[0030] S1, determining the radial movement amount of the elastic ring that needs to be driven, and determining the offset of the central axis of the input end of the loading assembly relative to the preset axis according to the radial movement amount;

[0031] S2, clamping and fixing the elastic ring on the loading assembly;

[0032] S3, placing the loading mechanism clamped with the elastic ring into the heating chamber;

[0033] S4. The driving mechanism drives the input end of the loading assembly in the heating chamber to rotate eccentrically around the preset axis.

[0034] Beneficial effects of the present invention:

[0035] The elastic ring radial movement fatigue test device provided by the present invention provides at least one group of loading structures connected in sequence along the axial direction of the elastic ring in the loading mechanism, ensuring that each group of loading structures includes two loading components connected radially relative to the elastic ring, so that the two loading components are clamped and fixed to the elastic ring in the radial direction of the elastic ring by the center of the elastic ring at the same time, thereby realizing stable clamping and fixing of the elastic ring, and by using a driving mechanism to synchronously drive the input ends of all the loading components to rotate eccentrically around a preset axis, thereby realizing the effect of driving the elastic ring to radially move, and the radial movement amount of the elastic ring is the offset amount of the central axis of the input end of the loading component relative to the preset axis, and by ensuring that the input ends of the two loading components in the same group of loading structures are The offset of the central axis relative to the preset axis is equal, and the offset directions of the central axes of the input ends of the two loading assemblies relative to the preset axis are opposite. While the two loading assemblies drive the elastic ring to produce radial movement, the vibration impact of the two loading assemblies on the driving mechanism can be self-balanced, which not only improves the protection of the driving mechanism, but also can further ensure the radial movement stability of the elastic ring. By arranging the loading mechanism and the elastic ring in the heating chamber of the heating furnace and heating the elastic ring in the heating chamber by the heating furnace, the high temperature environment in which the elastic ring is actually working can be simulated, so as to truly simulate the radial movement of the elastic ring in the actual operating environment, and provide real test data support for subsequent research and development improvements.

[0036] The present invention also provides an elastic ring radial movement fatigue test method. By applying the above-mentioned elastic ring radial movement fatigue test device, the radial movement of the elastic ring in the actual working environment can be truly simulated, providing real test data support for subsequent research and development improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of an elastic ring radial movement fatigue test device provided in Embodiment 1 of the present invention;

[0038] Figure 2 is a first structural schematic diagram of a loading structure provided in Embodiment 1 of the present invention;

[0039] Figure 3 is a second structural schematic diagram of the loading structure provided in the first embodiment of the present invention;

[0040] Figure 4 is a partial cross-sectional view of a loading structure provided in Embodiment 1 of the present invention;

[0041] Figure 5 is a schematic structural diagram of a transmission crankshaft provided in Embodiment 1 of the present invention;

[0042] Figure 6 is an exploded view of two groups of loading components provided in the first embodiment of the present invention;

[0043] Figure 7 It is a first structural schematic diagram of a loading assembly and a clamping assembly provided in Embodiment 1 of the present invention;

[0044] Figure 8 yes Figure 7 Schematic diagram of the cross section of section AA;

[0045] Fig. 9 It is a flow chart of the elastic ring radial movement fatigue test method provided in the second embodiment of the present invention.

[0046] In the figure:

[0047] 100, loading mechanism; 110, loading assembly; 111, transmission crankshaft; 1111, connecting hole; 1112, positioning hole; 112, connecting rod; 113, plug rod; 114, sliding guide structure; 1141, first bearing; 1142, first bearing seat; 1143, first bearing cover; 115, second bearing; 116, third bearing; 120, mounting frame; 121, first plate; 122, second plate; 130, clamping assembly; 131, tensioning sleeve; 1311, positioning groove; 132, fixing member; 140, connecting assembly; 141, isolation gasket; 142, positioning member;

[0048] 200, driving mechanism;

[0049] 300, heating furnace; 310, heating furnace body; 311, heating chamber; 320, insulation platform;

[0050] 2000. Elastic ring. DETAILED DESCRIPTION

[0051] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0052] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0055] Embodiment 1

[0056] In the aviation field, for the connection between the engine and the flight equipment, an elastic ring needs to be installed on the output end of the engine. Since radial vibration will be generated during the actual operation of the engine, the elastic ring installed on the output shaft of the engine will be affected by the engine and produce slight deformation in the radial direction. The long-term reciprocating deformation of the elastic ring can easily cause fatigue damage to the elastic ring. In addition, the operation stability of the engine is relatively high when it is working. In a high temperature environment, the service life of the elastic ring will also be greatly reduced due to the influence of high temperature. In order to verify the reliability of the elastic ring under high temperature conditions, targeted tests are required to provide test data support for subsequent research and development improvements.

[0057] For this reason, Figure 1 to Figure 5As shown, this embodiment provides an elastic ring radial movement fatigue test device. The elastic ring radial movement fatigue test device includes a loading mechanism 100, a driving mechanism 200 and a heating furnace 300, wherein the loading mechanism 100 includes at least one group of loading structures connected in sequence along the axial direction of the elastic ring 2000, each group of loading structures includes two loading components 110 connected radially opposite to each other along the elastic ring 2000, the two loading components 110 are clamped and fixed to the elastic ring 2000 by the center of the elastic ring 2000 along the radial direction of the elastic ring 2000, and the output end of the driving mechanism 200 is connected to the input end of all the loading components 110 The driving mechanism 200 can synchronously drive the input ends of all the loading assemblies 110 to rotate eccentrically around the preset axis. The central axes of the input ends of the two loading assemblies 110 in the same group of loading structures are offset from the preset axis by the same amount, and the central axes of the input ends of the two loading assemblies 110 are offset in opposite directions relative to the preset axis. The central axis of the input ends of the loading assemblies 110 is offset from the preset axis by the radial movement of the elastic ring 2000. The heating furnace 300 has a heating chamber 311 for accommodating and heating the loading mechanism 100 and the elastic ring 2000.

[0058] The elastic ring radial movement fatigue test device is provided with at least one group of loading structures connected in sequence along the axial direction of the elastic ring 2000 in the loading mechanism 100, so that each group of loading structures includes two loading assemblies 110 connected radially opposite to each other along the elastic ring 2000, so that the two loading assemblies 110 are clamped and fixed to the elastic ring 2000 in the radial direction of the elastic ring 2000 by the center of the elastic ring 2000 at the same time, thereby realizing stable clamping and fixing of the elastic ring 2000, and realizing the effect of driving the elastic ring 2000 to radially move by using the driving mechanism 200 to synchronously drive the input ends of all the loading assemblies 110 to rotate eccentrically around the preset axis, thereby realizing the effect of driving the elastic ring 2000 to radially move. The radial movement amount of the elastic ring 2000 is the offset amount of the central axis of the input end of the loading assembly 110 relative to the preset axis, and by ensuring that the central axis of the input ends of the two loading assemblies 110 in the same group of loading structures is The offset relative to the preset axis is equal, and the central axes of the input ends of the two loading components 110 are offset in opposite directions relative to the preset axis. While the two loading components 110 drive the elastic ring 2000 to produce radial movement, the vibration impact of the two loading components 110 on the driving mechanism 200 can be self-balanced, which not only improves the protection of the driving mechanism 200, but also can further ensure the radial movement stability of the elastic ring 2000. By arranging the loading mechanism 100 and the elastic ring 2000 in the heating chamber 311 of the heating furnace 300, the heating furnace 300 heats the elastic ring 2000 located in the heating chamber 311, which can simulate the high temperature environment in which the elastic ring 2000 is actually working, so as to achieve a true simulation of the radial movement of the elastic ring 2000 in the actual working environment, and provide real test data support for subsequent research and development improvements.

[0059] It should be noted that, in this embodiment, there is only one set of loading structures in the loading mechanism 100. In other embodiments, the number of loading structures in the loading mechanism 100 may also be two, three, four, etc., which is not specifically limited in this embodiment, and it is only necessary to ensure that when two or more loading structures are provided in the loading mechanism 100, the loading structures are sequentially connected along the axial direction of the elastic ring 2000, and all the loading structures are synchronously clamped and fixed to the elastic ring 2000, and the driving mechanism 200 synchronously drives all the loading structures to rotate eccentrically around the preset axis.

[0060] Combination Figure 4 and Figure 6 The specific structure of the loading assembly 110 is described. The loading assembly 110 includes a transmission crankshaft 111, a connecting rod 112 and a plug rod 113, wherein the input end of the transmission crankshaft 111 is connected to the output end of the driving mechanism 200, the driving mechanism 200 can drive the input end of the transmission crankshaft 111 to rotate around a preset axis and drive the output end of the transmission crankshaft 111 to rotate eccentrically around the preset axis, the connecting rod 112 is connected to the output end of the transmission crankshaft 111, the output end of the transmission crankshaft 111 can drive the connecting rod 112 to move radially along the elastic ring 2000, the radial movement distance of the connecting rod 112 along the elastic ring 2000 is the offset of the central axis of the transmission crankshaft 111 relative to the preset axis, one end of the plug rod 113 is rotatably connected to the connecting rod 112, and the other end of the plug rod 113 is clamped and fixed to the elastic ring 2000. By connecting the input end of the transmission crankshaft 111 to the output end of the driving mechanism 200, connecting the output end of the transmission crankshaft 111 to the connecting rod 112, and connecting the two ends of the plug rod 113 to the connecting rod 112 and the elastic ring 2000 respectively, the driving mechanism 200 drives the input end of the transmission crankshaft 111 to rotate around a preset axis, and utilizing the structural characteristics of the transmission crankshaft 111 to achieve eccentric rotation of the output end of the transmission crankshaft 111 around the preset axis, thereby achieving the effect of driving the plug rod 113 and the elastic ring 2000 to move radially thereof, with a simple structure and ingenious design.

[0061] In order to improve the driving effect of the radial movement of the elastic ring 2000, the loading mechanism 100 also includes a mounting frame 120, wherein the mounting frame 120 includes a first plate body 121 and a second plate body 122 that are interlocked, and the transmission crankshaft 111 is rotatably connected to the first plate body 121 or the second plate body 122. The loading assembly 110 also includes a sliding guide structure 114, which is fixed between the first plate body 121 and the second plate body 122. The sliding guide structure 114 is sleeved on the outer periphery of the plug rod 113, and the sliding guide structure 114 can provide guidance for the movement of the plug rod 113. By disposing the loading assembly 110 between the first plate body 121 and the second plate body 122 which are interlocked with each other, fixing the sliding guide structure 114 between the first plate body 121 and the second plate body 122, and sleeved the sliding guide structure 114 on the outer periphery of the plug rod 113, not only can the protection of the loading assembly 110 be improved, but the sliding guide structure 114 can also be used to provide guidance for the radial movement of the plug rod 113 along the elastic ring 2000, thereby achieving the effect of providing guidance for the radial movement of the elastic ring 2000.

[0062] It should be noted that, in this embodiment, after the first plate 121 and the second plate 122 are buckled together, the first plate 121 and the second plate 122 are fixed together by bolt threads. The threaded fixing method not only has a good fixing effect, but also is easy to disassemble and assemble, which is convenient for subsequent inspection and maintenance of the loading assembly 110 located between the first plate 121 and the second plate 122.

[0063] Specifically, the sliding guide structure 114 includes a first bearing 1141, a first bearing seat 1142 and a first bearing cover 1143, wherein the first bearing 1141 is sleeved on the outer periphery of the plug rod 113, the first bearing 1141 can move axially relative to the plug rod 113 along the plug rod 113, the first bearing seat 1142 is fixed to the first bearing cover 1143, the first bearing 1141 is arranged between the first bearing seat 1142 and the first bearing cover 1143, and the first bearing seat 1142 is respectively installed and fixed to the first plate body 121 and the second plate body 122. By fixing the first bearing seat 1142 and the first bearing cover 1143 in the sliding guide structure 114 together, fixing the first bearing seat 1142 to the first plate 121 and the second plate 122, and arranging the first bearing 1141 in the sliding guide structure 114 between the first bearing seat 1142 and the first bearing cover 1143, the assembly and fixation of the sliding guide structure 114 and the mounting frame 120 are realized, and by sleeve-arranging the first bearing 1141 on the outer periphery of the plug rod 113, the first bearing 1141 can move relative to the plug rod 113 along the axial direction of the plug rod 113, and can provide guidance for the movement of the plug rod 113 when the transmission crankshaft 111 drives the plug rod 113 to move along the radial direction of the elastic ring 2000. It should be noted that in this embodiment, the first bearing seat 1142 and the first plate 121 and the second plate 122 are detachably fixed together by bolts, so as to facilitate the disassembly and assembly of the sliding guide structure 114.

[0064] In addition, in this embodiment, the loading assembly 110 further includes a second bearing 115 and a third bearing 116, wherein the second bearing 115 is disposed between the input end of the transmission crankshaft 111 and the first plate 121 or the second plate 122, and the second bearing 115 is used to reduce the friction between the transmission crankshaft 111 and the first plate 121 and the friction between the transmission crankshaft 111 and the second plate 122, and the third bearing 116 is disposed between the output end of the transmission crankshaft 111 and the connecting rod 112, and the third bearing 116 is used to reduce the friction between the transmission crankshaft 111 and the connecting rod 112. It should be noted that, in this embodiment, the first bearing 1141, the second bearing 115 and the third bearing 116 are all resistant to high temperatures, so as to ensure that when the heating furnace 300 heats the loading mechanism 100, the first bearing 1141, the second bearing 115 and the third bearing 116 in the loading mechanism 100 can work normally.

[0065] As an alternative, Figure 1 to Figure 4 as well as Figure 7 and Figure 8As shown, each group of loading structures further includes a clamping assembly 130, wherein the clamping assembly 130 is connected to the loading assembly 110, and the clamping assembly 130 is used to clamp and fix the elastic ring 2000. By arranging the clamping assembly 130 connected to the loading assembly 110 in the loading structure and using the clamping assembly 130 to clamp and fix the elastic ring 2000, the clamping and fixing effect of the elastic ring 2000 can be further improved.

[0066] Specifically, the clamping assembly 130 includes a tensioning sleeve 131 and a fixing member 132, wherein the tensioning sleeve 131 can tension the elastic ring 2000 in the radial direction of the elastic ring 2000, and one end of the plug rod 113 in each loading assembly 110 away from the connecting rod 112 is correspondingly provided with a fixing member 132, and the fixing member 132 can install and fix the tensioning sleeve 131 and the corresponding plug rod 113. By using the tensioning sleeve 131 to tension the elastic ring 2000 in the radial direction of the elastic ring 2000, and using the fixing member 132 to fix the end of the plug rod 113 in each group of loading assemblies 110 away from the connecting rod 112, the tensioning and fixing effect of the elastic ring 2000 is further improved. It should be noted that, in this embodiment, the clamping assembly 130 also includes a locking bolt, a threaded through hole is provided on the fixing piece 132, a threaded blind hole is provided on the end of the plug rod 113 away from the connecting rod 112, and the locking bolt is threadedly fixed to the threaded through hole and the threaded blind hole in sequence to threadably fix the tensioning sleeve 131 to the plug rod 113.

[0067] To further improve the clamping stability of the elastic ring 2000, as Figure 8 As shown, the outer peripheral wall of the tension sleeve 131 is provided with a positioning groove 1311 along the axial direction, and the positioning groove 1311 is used to accommodate the elastic ring 2000. By providing the positioning groove 1311 along the circumferential direction on the outer peripheral wall of the tension sleeve 131, the elastic ring 2000 is accommodated in the positioning groove 1311, so that the axial positioning of the elastic ring 2000 relative to the tension sleeve 131 can be achieved, and the elastic ring 2000 is prevented from moving along the axial direction of the tension sleeve 131, thereby improving the clamping stability of the elastic ring 2000.

[0068] like Figure 5 As shown, in the two drive crankshafts 111 in the two groups of loading assemblies 110 in the same group of loading structures, one drive crankshaft 111 is an active drive crankshaft, and the other is a driven drive crankshaft. The input end of the active drive crankshaft is connected to the output end of the driving mechanism 200, and the output end of the driven drive crankshaft is connected to the output end of the active drive crankshaft. The output end of the active drive crankshaft replaces the original driving mechanism 200 to drive the output end of the driven drive crankshaft to rotate eccentrically around a preset axis. When the driving mechanism 200 drives the active drive crankshaft to rotate, the active drive crankshaft drives the driven drive crankshaft to rotate, so as to realize the synchronous rotation of the two groups of loading assemblies 110.

[0069] Specifically, the preset axis is the central axis of the elastic ring 2000. In this embodiment, the central axis of the output end of the driving mechanism 200 coincides with the central axis of the elastic ring 2000, the output end of the driving mechanism 200 is fixed coaxially with the input end of the active transmission crankshaft, the central axis of the output end of the active transmission crankshaft is offset downward relative to the central axis of the output end of the driving mechanism 200 and the offset distance is D, the central axis of the driven transmission crankshaft is offset upward relative to the central axis of the output end of the driving mechanism 200 and the offset distance is D, and D is 0.2mm. In other embodiments, the specific value of D can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0070] like Figure 8 As shown, each group of loading structures also includes a connecting assembly 140, wherein the connecting assembly 140 includes an isolation gasket 141 and a connecting piece (not shown in the figure), the isolation gasket 141 is clamped between the two third bearings 116 of the two groups of loading assemblies 110 along the axial direction of the elastic ring 2000, and the connecting piece can install and fix the two transmission crankshafts 111 along the axial direction of the elastic ring 2000. By clamping a reasonable isolation gasket 141 between the two third bearings 116 along the axial direction of the elastic ring 2000, direct contact between the two third bearings 116 can be avoided, and the protection of the third bearings 116 can be improved. By using the connecting piece to connect and fix the two transmission crankshafts 111 along the axial direction of the elastic ring 2000, the effect of the driving mechanism 200 synchronously driving the two transmission crankshafts 111 to rotate eccentrically is achieved. It should be noted that in this embodiment, the connecting piece is a connecting bolt, and a coaxially conductive connecting hole 1111 is opened in the two transmission crankshafts 111, and the connecting bolt is threadedly fixed with the two connecting holes 1111 in sequence.

[0071] To further facilitate the connection and fixing of the two transmission crankshafts 111, as Figure 6 As shown, the connection assembly 140 also includes a positioning member 142, wherein the two end surfaces of the two groups of loading assemblies 110 close to each other are respectively provided with positioning holes 1112, and when the two groups of loading assemblies 110 are connected and fixed along the elastic ring 2000, the positioning member 142 is simultaneously accommodated in the two positioning holes 1112. When it is necessary to use a connection member to connect and fix two transmission crankshafts 111, firstly, the positioning member 142 is placed in the positioning hole 1112 of one transmission crankshaft 111, and then the other transmission crankshaft 111 is docked with the transmission crankshaft 111, so that the positioning hole 1112 in the other transmission crankshaft 111 accommodates the positioning member 142, that is, the installation and positioning of the two transmission crankshafts 111 are completed, and in this state, the connection holes 1111 in the two transmission crankshafts 111 are coaxially connected, and then the two transmission crankshafts 111 are connected and fixed using a connection member.

[0072] As an optional solution, the driving mechanism 200 is a rotary motor. The rotary motor has a simple structure, stable output power, and large output power. It should be noted that in this embodiment, the output power of the rotary motor is 21000r / min, and the output shaft of the rotary motor is connected to the output end of the transmission crankshaft 111 through a coupling. In other embodiments, the driving mechanism 200 may also be a rotary cylinder or other rotary drive structure, and the specific output power of the rotary motor may also be adjusted according to actual needs, which is not specifically limited in this embodiment.

[0073] like Figure 1 As shown, the heating furnace 300 includes a heating furnace body 310 and an insulating platform 320, a heating chamber 311 is provided in the heating furnace body 310, the insulating platform 320 is located in the heating chamber 311, and the loading mechanism 100 is placed on the insulating platform 320. By providing the insulating platform 320 in the heating chamber 311 in the heating furnace body 310 and placing the loading mechanism 100 on the insulating platform 320, direct contact between the loading mechanism 100 and the cavity wall of the heating chamber 311 can be avoided, which not only improves the protection of the loading mechanism 100 and the cavity wall of the heating chamber 311, but also avoids heat transfer between the cavity wall of the heating chamber 311 and the loading mechanism 100, further realistically simulating the high temperature environment of the elastic ring 2000. It should be noted that, in this embodiment, the temperature in the heating chamber 311 is 580°C. In other embodiments, the heating temperature of the heating furnace 300 can also be adjusted according to actual needs, and this embodiment is not specifically limited.

[0074] Embodiment 2

[0075] This embodiment provides a method for testing the radial movement fatigue of an elastic ring. Fig. 9 As shown, the elastic ring radial movement fatigue test method is applied to the elastic ring radial movement fatigue test device, comprising the following steps:

[0076] S1, determining the radial movement amount of the elastic ring 2000 that needs to be driven, and determining the offset of the central axis of the input end of the loading assembly 110 relative to the preset axis according to the radial movement amount;

[0077] S2, clamping and fixing the elastic ring 2000 on the loading assembly 110;

[0078] S3, placing the loading mechanism 100 clamped with the elastic ring 2000 into the heating chamber 311;

[0079] S4. The driving mechanism 200 drives the input end of the loading assembly 110 in the heating chamber 311 to rotate eccentrically around a preset axis.

[0080] The elastic ring radial movement fatigue test method can truly simulate the radial movement of the elastic ring 2000 in an actual operating environment by applying the elastic ring radial movement fatigue test device mentioned above, and provide real test data support for subsequent research and development improvements.

[0081] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Elastic ring radial movement fatigue test device, characterized in that: include: A loading mechanism (100) comprising at least one group of loading structures connected in sequence along the axial direction of an elastic ring (2000), each group of the loading structures comprising two loading assemblies (110) connected radially opposite to each other along the elastic ring (2000), the two loading assemblies (110) being clamped and fixed to the elastic ring (2000) along the radial direction of the elastic ring (2000) via the center of the elastic ring (2000); and A driving mechanism (200), wherein the output end of the driving mechanism (200) is connected to the input ends of all the loading assemblies (110), and the driving mechanism (200) can synchronously drive the input ends of all the loading assemblies (110) to rotate eccentrically around a preset axis, the central axes of the input ends of two loading assemblies (110) in the same group of the loading structure have an equal offset relative to the preset axis, and the central axes of the input ends of the two loading assemblies (110) have opposite offset directions relative to the preset axis, and the offset of the central axis of the input end of the loading assembly (110) relative to the preset axis is the radial movement amount of the elastic ring (2000); as well as The heating furnace (300) has a heating chamber (311) for accommodating and heating the loading mechanism (100) and the elastic ring (2000).

2. The elastic ring radial movement fatigue test device according to claim 1 is characterized in that: The loading component (110) comprises: A transmission crankshaft (111), wherein an input end of the transmission crankshaft (111) is connected to an output end of the driving mechanism (200), and the driving mechanism (200) is capable of driving the input end of the transmission crankshaft (111) to rotate around the preset axis and driving the output end of the transmission crankshaft (111) to rotate eccentrically around the preset axis; a connecting rod (112) connected to an output end of the transmission crankshaft (111), the output end of the transmission crankshaft (111) being capable of driving the connecting rod (112) to move radially along the elastic ring (2000), the radial movement distance of the connecting rod (112) along the elastic ring (2000) being an offset of the central axis of the transmission crankshaft (111) relative to the preset axis; and A plug rod (113), one end of the plug rod (113) is rotatably connected to the connecting rod (112), and the other end of the plug rod (113) is clamped and fixed to the elastic ring (2000).

3. The elastic ring radial movement fatigue test device according to claim 2 is characterized in that: The loading mechanism (100) further comprises: The mounting frame (120) comprises a first plate (121) and a second plate (122) which are interlocked with each other, the transmission crankshaft (111) is rotatably connected to the first plate (121) or the second plate (122), and the loading assembly (110) further comprises a sliding guide structure (114), the sliding guide structure (114) is fixed between the first plate (121) and the second plate (122), the sliding guide structure (114) is sleeved on the outer periphery of the plug rod (113), and the sliding guide structure (114) can provide guidance for the movement of the plug rod (113).

4. The elastic ring radial movement fatigue test device according to claim 3 is characterized in that: The sliding guide structure (114) comprises: a first bearing (1141), sleeved on the outer circumference of the plug rod (113), the first bearing (1141) being capable of moving relative to the plug rod (113) along the axial direction of the plug rod (113); and A first bearing seat (1142) and a first bearing cover (1143), wherein the first bearing seat (1142) is fixed to the first bearing cover (1143), the first bearing (1141) is arranged between the first bearing seat (1142) and the first bearing cover (1143), and the first bearing seat (1142) is respectively installed and fixed to the first plate body (121) and the second plate body (122).

5. The elastic ring radial movement fatigue test device according to any one of claims 1 to 4, characterized in that: Each group of the loading structures further includes: A clamping assembly (130), the clamping assembly (130) is connected to the loading assembly (110), and the clamping assembly (130) is used to clamp and fix the elastic ring (2000).

6. The elastic ring radial movement fatigue test device according to claim 5, characterized in that: The clamping assembly (130) comprises: a tensioning sleeve (131), wherein the tensioning sleeve (131) is capable of tensioning the elastic ring (2000) in a radial direction of the elastic ring (2000); and A fixing member (132), each loading assembly (110) is provided corresponding to a fixing member (132), and the fixing member (132) can install and fix the tensioning sleeve (131) and the corresponding loading assembly (110).

7. The elastic ring radial movement fatigue test device according to claim 6, characterized in that: A positioning groove (1311) is axially arranged on the outer peripheral wall of the tensioning sleeve (131), and the positioning groove (1311) is used to accommodate the elastic ring (2000).

8. The elastic ring radial movement fatigue test device according to any one of claims 1 to 4, characterized in that: Each group of the loading structures further includes: A connecting assembly (140), the connecting assembly (140) comprising an isolation gasket (141) and a connecting piece, the isolation gasket (141) being clamped between two groups of the loading assemblies (110) along the axial direction of the elastic ring (2000), and the connecting piece being capable of installing and fixing the two groups of the loading assemblies (110) along the axial direction of the elastic ring (2000).

9. The elastic ring radial movement fatigue test device according to claim 8, characterized in that: The connection assembly (140) further includes: A positioning member (142), wherein the two end surfaces of the two groups of loading assemblies (110) close to each other are respectively provided with positioning holes (1112); when the two groups of loading assemblies (110) are connected and fixed along the elastic ring (2000), the positioning member (142) is simultaneously accommodated in the two positioning holes (1112).

10. Elastic ring radial movement fatigue test method, characterized in that: The elastic ring radial movement fatigue test device as claimed in any one of claims 1 to 9 comprises the following steps: S1, determining the radial movement amount required to drive the elastic ring (2000), and determining the offset of the central axis of the input end of the loading component (110) relative to the preset axis according to the radial movement amount; S2, clamping and fixing the elastic ring (2000) on the loading assembly (110); S3, placing the loading mechanism (100) clamped with the elastic ring (2000) into the heating chamber (311); S4. The driving mechanism (200) drives the input end of the loading assembly (110) in the heating chamber (311) to rotate eccentrically around the preset axis.

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