Loading device for simulating multi-mode fretting wear

Abstract

According to the loading device for simulating multi-mode fretting wear, better mechanical transmission is achieved through the tangential loading unit, the first normal loading unit and the second normal loading unit, and the fretting transmission effect during fretting can be guaranteed. And the loading unit is limited through the limiting clamping groove unit, so that the stability of the first normal transmission part, the second normal transmission part and the tangential transmission part is ensured when the fretting wear loading device is driven, and the fretting wear loading device is prevented from deviating. And the tangential loading unit and the first normal loading unit can realize single operation through an external driving system and can also realize coupling through common operation.

Description

Technical Field

[0001] The invention relates to the technical field of fretting wear experimental devices, and in particular to a loading device for simulating multi-mode fretting wear. Background Art

[0002] In the micro-motion wear experiment, the sample is driven by the micro-motion drive system to achieve displacement, and a quantitative load is applied through the force system, so that micro-motion occurs between the sample and the grinding pair, simulating the micro-motion wear effect between heat transfer tubes. The micro-motion drive system consists of a piezoelectric ceramic actuator and a micro-transmission device. The piezoelectric ceramic actuator can output a push-pull force of a certain frequency, and the push-pull force drives the sample to achieve displacement through the micro-transmission device. Therefore, a good design of the loading unit is the basis for ensuring that the normal load is effectively, stably, quantitatively applied, and the micro-motion drive is stable. The good force output of the loading unit is the guarantee of the accuracy of the micro-motion wear experiment. Before doing the micro-motion wear experiment, it is necessary to perform laser displacement calibration on the pull rod connected to the piezoelectric actuator to confirm that the loading unit has good micro-motion transmission.

[0003] However, the loading devices of most micro-motion wear devices currently have complex structures and single effects. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a loading device for simulating multi-mode micro-motion wear, so as to solve the technical problems that the loading devices of most micro-motion wear devices in the prior art are complex in structure and have a single effect.

[0005] The present invention provides a loading device for simulating multi-mode micro-motion wear, comprising:

[0006] A clamping unit, a limit slot unit, a tangential loading unit, a first normal loading unit and a second normal loading unit, wherein the clamping unit comprises a sample fixture and a grinding pair fixture, the tangential loading unit comprises a piezoelectric actuator, a tangential transmission member, and a tangential sealing connection member, the first normal loading unit comprises a screw force applicator, a first normal sealing connection member, and a first normal transmission member, the second normal loading unit comprises a second normal sealing connection member and a second normal transmission member, and the limit slot unit comprises a positioning rod, a normal support block, a tangential top screw and a slot body;

[0007] One side of the tangential transmission member is connected to one side of the sample fixture, and one end of the tangential transmission member is connected to a tangential sealing connector and a piezoelectric actuator in sequence, the other side of the tangential transmission member is connected to one end of a first normal transmission member, the other end of the first normal transmission member is connected to a first normal sealing connector and a screw force applicator in sequence, the other side of the sample fixture is connected to a side close to the grinding pair fixture, the other side of the grinding pair fixture is connected to one end of a second normal transmission member, the other end of the second normal transmission member is connected to a second normal sealing connector, and one end of the first normal transmission member and one end of the second normal transmission member respectively pass through the positioning rod on the slot body and are arranged at the upper end of the normal support block in the slot body, the sample fixture and the grinding pair fixture are both embedded in the limiting groove in the middle of the slot body, and the slot body is provided with a pair of tangential top screws on both sides of the sample fixture corresponding to the slot body.

[0008] Optionally, the tangential sealing connector, the first normal sealing connector and the second normal sealing connector all include:

[0009] Inner jacket, inner jacket base, inner jacket pressure cap, sealing outer sleeve, connector, inner retaining ring, transmission part, connecting chuck, bellows, outer connecting sleeve, inner support sleeve, outer sleeve nut, connecting rod, connecting rod end cover, outer retaining ring, connecting rod end cover, outer support sleeve, outer jacket, outer jacket base and outer jacket pressure nut;

[0010] One end of the inner jacket is connected to the transmission member, and the other end thereof is connected to one end of the inner jacket base. The inner jacket pressure cap is sleeved on the circumference of the inner jacket, and a sealing outer sleeve, an inner retaining ring and an inner support sleeve are sequentially arranged on the circumference of the inner jacket base. One end of the connecting chuck is connected to the sealing outer sleeve through the inner support sleeve and the inner retaining ring in sequence.

[0011] One end of the bellows is connected to the other end of the inner jacket base through a connector, the outer connecting sleeve is sleeved on the circumferential side of the bellows, one end of the outer connecting sleeve is connected to the other end of the connecting chuck, and the other end thereof is sleeved with an outer sleeve nut, one end of the connecting rod passes through the outer sleeve nut to connect the other end of the bellows, and the other end thereof passes through an outer retaining ring and an outer supporting sleeve in sequence to connect to the connecting rod end cover, and the outer retaining ring and the outer supporting sleeve are sleeved with an outer jacket base on the outside, one end of the outer jacket base is connected to the outer jacket nut, and the other end thereof is connected to the outer jacket pressing nut through the outer jacket.

[0012] Optionally, one side of the tangential transmission member is connected to one side of the sample fixture, comprising:

[0013] The sample clamp comprises a tangential pull rod clamp, a sample base, and a sample pressing screw. The tangential pull rod clamp is fixed to one side of the tangential transmission member, and the sample base is detachably connected to the tangential pull rod clamp. The test sample is arranged inside the sample base and fixed by the sample pressing screw.

[0014] Optionally, the other side of the sample fixture is connected to one side of the grinding pair fixture, and the other side of the grinding pair fixture is connected to one end of the second normal transmission member, including:

[0015] A secondary sample is arranged inside the grinding pair fixture, and one side of the grinding pair fixture close to the secondary sample abuts against the other side of the sample fixture, and the other side of the grinding pair fixture away from the secondary sample is connected to one end of the second normal transmission member.

[0016] Optionally, the positioning rod comprises:

[0017] The positioning rods are arranged in groups of four on the left and right sides of the card slot body.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The tangential loading unit, the first normal loading unit and the second normal loading unit have better mechanical transmission, which can ensure the micro-motion transmission effect during micro-motion.

[0020] 2. The loading unit is limited by the limiting slot unit to ensure the stability of the first normal transmission member, the second normal transmission member and the tangential transmission member when the micro-wear loading device is driven to avoid their deviation.

[0021] 3. The tangential loading unit and the first normal loading unit can be operated separately through an external driving system, or they can be operated together to achieve coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0023] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2It is a schematic structural diagram of a tangential sealing connector, a first normal sealing connector and a second normal sealing connector in the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the sample fixture in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the grinding pair fixture in the present invention;

[0028] Figure 5 It is a schematic diagram of the abutment between the sample fixture and the grinding pair fixture in the present invention;

[0029] Figure 6 It is a schematic structural diagram of the position limiting slot unit in the present invention.

[0030] Description of reference numerals:

[0031] 101, tangential transmission member; 102, tangential sealing connector; 201, screw force applicator; 202, first normal sealing connector; 203, first normal transmission member; 301, second normal sealing connector; 302, second normal transmission member; 401, positioning rod; 402, normal support block; 403, tangential top screw; 404, slot body; 501, inner jacket; 502, inner jacket base; 503, inner jacket pressure cap; 504, sealing outer sleeve; 505, connector; 5 06. Inner retaining ring; 507. Connecting chuck; 508. Bellows; 509. External connecting sleeve; 510. Inner support sleeve; 511. Outer sleeve nut; 512. Connecting rod; 513. Connecting rod end cover; 514. Outer retaining ring; 515. Outer support sleeve; 516. Outer jacket; 517. Outer jacket base; 518. Outer jacket clamping nut; 601. Sample fixture; 602. Grinding pair fixture; 603. Tangential pull rod fixture; 604. Sample base; 605. Sample clamping screw. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation cases obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The functional units with the same labels in the examples of the present invention have the same and similar structures and functions.

[0033] See also Figure 1 and Figure 6 The present invention provides a loading device for simulating multi-mode micro-motion wear, comprising:

[0034] A clamping unit, a limit slot unit, a tangential loading unit, a first normal loading unit and a second normal loading unit, wherein the clamping unit comprises a sample fixture 601 and a grinding pair fixture 602, the tangential loading unit comprises a piezoelectric actuator, a tangential transmission member 101, and a tangential sealing connection member 102, the first normal loading unit comprises a screw force applicator 201, a first normal sealing connection member 202, and a first normal transmission member 203, the second normal loading unit comprises a second normal sealing connection member and a second normal transmission member 302, and the limit slot unit comprises a positioning rod 401, a normal support block 402, a tangential top screw 403 and a slot body 404;

[0035] One side of the tangential transmission member 101 is connected to one side of the sample fixture 601, and one end of the tangential transmission member 101 is connected to the tangential sealing connector 102 and the piezoelectric actuator in sequence, the other side of the tangential transmission member 101 is connected to one end of the first normal transmission member 203, the other end of the first normal transmission member 203 is connected to the first normal sealing connector 202 and the screw force applicator 201 in sequence, the other side of the sample fixture 601 is connected to a side close to the grinding pair fixture 602, and the other side of the grinding pair fixture 602 is connected to the second normal transmission member 203. One end of the movable member 302, the other end of the second normal transmission member 302 is connected to the second normal sealing connector, and one end of the first normal transmission member 203 and one end of the second normal transmission member 302 respectively pass through the positioning rod 401 on the slot body 404, and are arranged at the upper end of the normal support block 402 in the slot body 404, the sample fixture 601 and the grinding pair fixture 602 are both embedded in the limiting groove in the middle of the slot body 404, and the slot body 404 is provided with a pair of tangential top screws 403 on both sides of the sample fixture 601 corresponding to the slot body 404.

[0036] See also Figure 1 In this embodiment, the sample fixture 601 and the grinding pair fixture 602 are taken as steel wire sample fixtures and tube sample fixtures, which can realize the fixation of tube samples and steel wire samples of different lengths and different outer diameters. The tangential loading unit includes a piezoelectric actuator, a tangential transmission member 101, and a tangential sealing connection member 102. The first normal loading unit includes a screw force applicator 201, a first normal sealing connection member 202, and a first normal transmission member 203. The second normal loading unit includes a second normal sealing connection member 301 and a second normal transmission member 302.

[0037] One side of the tangential transmission member 101 is connected to one side of the sample fixture 601, and one end of the tangential transmission member 101 is connected to the tangential sealing connection member 102 and the piezoelectric actuator in sequence, the other side of the tangential transmission member 101 is connected to one end of the first normal transmission member 203, the other end of the first normal transmission member 203 is connected to the first normal sealing connection member 202 and the screw force applicator 201 in sequence, the other side of the sample fixture 601 is connected to a side close to the grinding pair fixture 602, the other side of the grinding pair fixture 602 is connected to one end of the second normal sealing connection member 301, the other end of the second normal transmission member 302 is connected to the second normal sealing connection member 301, and in practice the piezoelectric actuator and the screw force applicator 201 are respectively connected to the drive system;

[0038] Then, the positioning rod 401 provided on the slot body 404 limits and fixes one end of the first normal transmission member 203 and one end of the second normal transmission member 302 respectively, and at the same time, one end of the first normal transmission member 203 and the second normal transmission member 302 are respectively supported by the normal support block 402 in the slot body 404, and at the same time, the sample fixture 601 and the grinding pair fixture 602 are both embedded in the limiting groove in the middle of the slot body 404, realizing the overall limiting, and fixed by a pair of tangential top screws 403 provided on both sides of the slot body 404 corresponding to the sample fixture 601.

[0039] Since the tangential transmission member 101 is connected to the tangential sealing connection member 102, the steel wire sample clamp on the tangential transmission member 101 is driven to slide tangentially through the piezoelectric actuator via the tangential sealing connection member 102. In the first normal loading unit, the screw force applicator 201 is used to apply a constant normal load through the connected first normal sealing connection member 202, and the normal force is transmitted through the first normal transmission member 203. The second normal sealing connection member is connected to the tube sample fixture through the second normal transmission member 302, so that the tube sample fixture abuts the steel wire sample fixture. The transmitted normal force makes the steel wire sample fixture and the tube sample fixture touch and bear the normal load, and then the micro-motion wear experimental research under different normal loads is carried out. What is described here is the tangential and normal coupling test. The piezoelectric actuator and the screw force applicator 201 can also be controlled by the driving system to perform tangential and normal experiments respectively.

[0040] Therefore, the tangential loading unit and the first normal loading unit in the present invention can be respectively operated separately through an external driving system, or they can be operated together to achieve coupling. The loading unit is also limited by a limiting slot unit to ensure the stability of the first normal transmission member 203, the second normal transmission member 302 and the tangential transmission member 101 when the micro-wear loading device is driven to avoid their displacement.

[0041] See also Figure 2In another embodiment, the tangential sealing connector 102, the first normal sealing connector 202 and the second normal sealing connector all include:

[0042] Inner jacket 501, inner jacket base 502, inner jacket pressure cap 503, sealing outer sleeve 504, connector 505, inner retaining ring 506, transmission member, connecting chuck 507, bellows 508, outer connecting sleeve 509, inner support sleeve 510, outer sleeve nut 511, connecting rod 512, connecting rod end cover 513, outer retaining ring 514, connecting rod end cover 513, outer support sleeve 515, outer jacket 516, outer jacket base 517 and outer jacket pressing nut 518;

[0043] One end of the inner jacket is connected to the transmission member, and the other end thereof is connected to one end of the inner jacket base 502. The inner jacket 501 is sleeved with an inner jacket pressure cap 503 on its circumference, and the inner jacket base 502 is sequentially ringed with a sealing outer sleeve 504, an inner retaining ring 506 and an inner support sleeve 510 on its circumference. One end of the connecting chuck 507 is connected to the sealing outer sleeve 504 through the inner support sleeve 510 and the inner retaining ring 506 in sequence.

[0044] One end of the bellows 508 is connected to the other end of the inner jacket base 502 through a connector 505, and the outer connecting sleeve 509 is sleeved on the circumferential side of the bellows 508. One end of the outer connecting sleeve 509 is connected to the other end of the connecting chuck 507, and the other end of the outer connecting sleeve 509 is sleeved with an outer sleeve nut 511. One end of the connecting rod 512 passes through the outer sleeve nut 511 to connect to the other end of the bellows 508, and the other end of the connecting rod 512 passes through an outer retaining ring 514 and an outer supporting sleeve 515 in turn to connect to the connecting rod end cover 513, and the outer retaining ring 514 and the outer supporting sleeve 515 are sleeved with an outer jacket base 517 on the outside, one end of the outer jacket base 517 is connected to the outer sleeve nut 511, and the other end of the outer jacket base 517 is connected to the outer jacket nut 511, and the outer jacket pressing nut 518 is connected to the outer jacket 516.

[0045] See also Figure 3 - Figure 5In this embodiment, taking the tangential sealing connector 102 as an example, the inner jacket 501 connects the tangential transmission member 101 to the inner jacket base 502. There is a small gap on the inner jacket 501. Under the action of the inner jacket pressure cap 503, the inner jacket 501 will shrink and tightly clamp the tangential connector. Similarly, under the action of the outer jacket compression cap 518, the fixed outer jacket 516 connects the external piezoelectric ceramic actuator to the outer jacket base 517. The connecting rod end cover 513 has an internal thread, and the bolts of the piezoelectric ceramic actuator are connected to it for micro-motion transmission. It can be seen that the connecting rod 512 runs through the entire outer connecting sleeve 509, transmits the micro-motion to the inner jacket base 502, and then applies tangential displacement to the sample fixture 601. The inner support sleeve 510 and the outer support sleeve 515 respectively support the inner connecting sleeve and the connecting rod 512, which is also to prevent the generation of offset displacement and affect the experiment. The first normal loading unit and the second normal loading unit also have this structure, and this design is to realize the tangential-impact coupling micro-motion wear experiment. Among them, the second normal loading unit is mainly used to hold the abutment tube sample fixture.

[0046] Among them, the piezoelectric actuator connected to the end of the tangential sealing connector 102 away from the tangential transmission member 101 outputs a push-pull force of a certain frequency. The push-pull force drives the steel wire sample fixture through the tangential sealing connector 102 to achieve a tangential displacement of 0 to 200 μm. Different piezoelectric actuators can be replaced according to actual needs, which can achieve both normal force and normal impact. Different excitation modes can be achieved through control, including sine (cosine), triangle wave, random wave, and the frequency is 0 to 100 Hz. The sealing connection structure is consistent, easy to replace, and has the characteristics of easy expansion.

[0047] In the first normal loading unit, the screw force applicator 201 connected to one end of the first normal sealing connection 202 away from the first normal transmission member 203 outputs the normal preload through the first normal sealing connection 202 and the first normal transmission member 203, and a force sensor can be set for real-time monitoring, with a monitoring range of 0 to 200 N. By applying the normal load, the pipe sample and the steel wire sample are compressed, wherein the pipe sample is fixed, and the steel wire sample reciprocates at a predetermined frequency and amplitude under the action of the tangential loading unit.

[0048] Furthermore, since one end of the inner jacket 501 is connected to the transmission member and the other end is connected to one end of the inner jacket base 502, the inner jacket pressure cap 503 can achieve both a fixed connection and a sealing effect. Secondly, a sealing outer sleeve 504 provided on the periphery of the inner jacket base 502 can realize a primary barrier to prevent external gas or impurities from entering, thereby forming a primary seal.

[0049] By means of the inner support sleeve 510 and the inner retaining ring 506 which are arranged around the inner jacket base 502, when the inner retaining ring 506 is abutted between the connecting chuck 507 and the sealing outer sleeve 504, a sealed connection is achieved, and the inner support sleeve 510 is used to fill the gap between the inside of the connecting chuck 507 and the inner jacket base 502, thereby achieving secondary sealing.

[0050] One end of the bellows 508 is connected to the other end of the inner jacket base 502 through an inner connecting pipe. It is not only used as a seal, but also plays an important role in micro-motion transmission in the device. And ensure that the seal is not easily damaged. In addition, the material and processing accuracy of the bellows 508 are high, which can effectively maintain deformation and restore to its original state in a high-pressure environment, providing continuous stability. The bellows 508 not only increases the flexibility of the sealing layer, but also reduces the direct impact of high-pressure gas on the device, so that the device can still maintain airtightness when it is subjected to large pressure fluctuations. In addition, the peripheral side of the bellows 508 is sleeved with an external connecting sleeve 509, one end of the external connecting sleeve 509 is connected to the other end of the connecting chuck 507, and the other end is sleeved with an outer sleeve nut 511. The outer sleeve nut 511 is used to increase the airtightness of the external connecting sleeve 509 to prevent the internal gas from diffusing outward, and a three-level seal is formed here.

[0051] The outer jacket pressing nut 518 is located at the end of the end, and the outer jacket 516 is similar to a conical structure with a gap on it. The outer jacket pressing cap is fixed on the outer jacket base 517. The tighter it is screwed, the tighter the cone fit between the outer jacket 516 and the outer jacket pressing cap 518 will be, and the smaller the gap of the outer jacket 516 will be, and the connecting rod end cover 513 will be clamped more tightly, and sealing is achieved by reducing the gap to form a four-level seal.

[0052] In another embodiment, one side of the tangential transmission member 101 is connected to one side of the sample holder 601, including:

[0053] The sample fixture 601 includes a tangential pull rod fixture 603, a sample base 604, and a sample pressing screw 605. The tangential pull rod fixture 603 is fixed to one side of the tangential transmission member 101, and the sample base 604 is detachably connected to the tangential pull rod fixture 603. The test sample is arranged inside the sample base 604 and is fixed by the sample pressing screw 605.

[0054] In another embodiment, the other side of the sample fixture 601 is connected to one side of the grinding pair fixture 602, and the other side of the grinding pair fixture 602 is connected to one end of the second normal transmission member 302, including:

[0055] A secondary sample is arranged inside the grinding pair fixture 602 , and the side of the grinding pair fixture 602 close to the secondary sample abuts against the other side of the sample fixture 601 , and the other side of the grinding pair fixture 602 away from the secondary sample is connected to one end of the second normal transmission member 302 .

[0056] In another embodiment, the positioning rod 401 comprises:

[0057] The positioning rods 401 are arranged in groups of four on the left and right sides of the card slot body 404 .

[0058] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A loading device for simulating multi-mode micro-wear, characterized in that: include: A clamping unit, a limit slot unit, a tangential loading unit, a first normal loading unit and a second normal loading unit, wherein the clamping unit comprises a sample fixture and a grinding pair fixture, the tangential loading unit comprises a piezoelectric actuator, a tangential transmission member, and a tangential sealing connection member, the first normal loading unit comprises a screw force applicator, a first normal sealing connection member, and a first normal transmission member, the second normal loading unit comprises a second normal sealing connection member and a second normal transmission member, and the limit slot unit comprises a positioning rod, a normal support block, a tangential top screw and a slot body; One side of the tangential transmission member is connected to one side of the sample fixture, and one end of the tangential transmission member is connected to a tangential sealing connector and a piezoelectric actuator in sequence, the other side of the tangential transmission member is connected to one end of a first normal transmission member, the other end of the first normal transmission member is connected to a first normal sealing connector and a screw force applicator in sequence, the other side of the sample fixture is connected to a side close to the grinding pair fixture, the other side of the grinding pair fixture is connected to one end of a second normal transmission member, the other end of the second normal transmission member is connected to a second normal sealing connector, and one end of the first normal transmission member and one end of the second normal transmission member respectively pass through the positioning rod on the slot body and are arranged at the upper end of the normal support block in the slot body, the sample fixture and the grinding pair fixture are both embedded in the limiting groove in the middle of the slot body, and the slot body is provided with a pair of tangential top screws on both sides of the sample fixture corresponding to the slot body.

2. Use of the multi-mode micro-wear simulating loading device as claimed in claim 1, characterized in that: The tangential sealing connector, the first normal sealing connector and the second normal sealing connector all include: Inner jacket, inner jacket base, inner jacket pressure cap, sealing outer sleeve, connector, inner retaining ring, transmission part, connecting chuck, bellows, outer connecting sleeve, inner support sleeve, outer sleeve nut, connecting rod, connecting rod end cover, outer retaining ring, outer support sleeve, outer jacket, outer jacket base and outer jacket pressure nut; One end of the inner jacket is connected to the transmission member, and the other end thereof is connected to one end of the inner jacket base. The inner jacket pressure cap is sleeved on the circumference of the inner jacket, and a sealing outer sleeve, an inner retaining ring and an inner support sleeve are sequentially arranged on the circumference of the inner jacket base. One end of the connecting chuck is connected to the sealing outer sleeve through the inner support sleeve and the inner retaining ring in sequence. One end of the bellows is connected to the other end of the inner jacket base through a connector, the outer connecting sleeve is sleeved on the circumferential side of the bellows, one end of the outer connecting sleeve is connected to the other end of the connecting chuck, and the other end thereof is sleeved with an outer sleeve nut, one end of the connecting rod passes through the outer sleeve nut to connect the other end of the bellows, and the other end thereof passes through an outer retaining ring and an outer supporting sleeve in sequence to connect to the connecting rod end cover, and the outer retaining ring and the outer supporting sleeve are sleeved with an outer jacket base on the outside, one end of the outer jacket base is connected to the outer jacket nut, and the other end thereof is connected to the outer jacket pressing nut through the outer jacket.

3. The loading device for simulating multi-mode micro-wear according to claim 1, characterized in that: One side of the tangential transmission member is connected to one side of the sample fixture, comprising: The sample clamp comprises a tangential pull rod clamp, a sample base, and a sample pressing screw. The tangential pull rod clamp is fixed to one side of the tangential transmission member, and the sample base is detachably connected to the tangential pull rod clamp. The test sample is arranged inside the sample base and fixed by the sample pressing screw.

4. The loading device for simulating multi-mode micro-wear according to claim 1, characterized in that: The other side of the sample fixture is connected to one side of the grinding pair fixture, and the other side of the grinding pair fixture is connected to one end of the second normal transmission member, including: A secondary sample is arranged inside the grinding pair fixture, and one side of the grinding pair fixture close to the secondary sample abuts against the other side of the sample fixture, and the other side of the grinding pair fixture away from the secondary sample is connected to one end of the second normal transmission member.

5. The loading device for simulating multi-mode micro-wear according to claim 1, characterized in that: The positioning rod comprises: The positioning rods are arranged in groups of four on the left and right sides of the card slot body.

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