Experimental device for simulating tangential fretting wear of high-temperature metal in liquid environment

Abstract

The invention discloses an experimental device for simulating tangential fretting wear in a high-temperature metal liquid environment, which belongs to the technical field of material physical property analysis and testing and comprises a lower clamp and an upper clamp which are positioned in a high-temperature kettle, a driving shaft and a friction transmission shaft which are horizontally arranged, and a friction measuring mechanism for measuring axial force borne by the friction transmission shaft, the loading rod is vertically arranged and can freely move in the axial direction, one end of the hinge shaft is hinged to the friction transmission shaft, the other end of the hinge shaft is connected with the upper clamp, the driving shaft is used for driving the lower clamp to do reciprocating linear motion, and the driving shaft, the hinge shaft and the loading rod are located in the same vertical plane. According to the invention, the upper clamp does not move horizontally in the experiment process, and only one acting force is applied to the upper clamp along the horizontal direction, namely the friction force of the two abrasion samples, so that the friction force between the abrasion samples can be accurately measured through the axial force borne by the friction force transmission shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material physical property analysis testing, and also relates to the technical field of fretting wear, in particular to a mechanism research on fretting wear of lead / lead-bismuth fast reactor structural materials under high-temperature extreme environment, and specifically to a tangential fretting wear experimental device for simulating a high-temperature metal liquid environment. BACKGROUND

[0002] During the operation of a reactor, the high-speed flow of the in-core cooling medium lead-bismuth alloy can cause an erosion effect on the contacted steel interface. At present, there are experimental devices for studying the fretting wear of materials in a high-temperature lead-bismuth environment, but they cannot well collect stable and real tangential friction forces.

[0003] The fretting wear device in a high-temperature liquid lead environment developed by the Russian Academy of Sciences and the patent with the publication number CN117347209A disclose a fretting wear experimental device for simulating a lead-bismuth environment, in which a tangential friction force sensor is arranged on a driving rod that moves reciprocally in the tangential direction, and a dynamic seal is arranged between the driving shaft and the pipe wall in order to prevent the leakage of the liquid alloy. Therefore, during the operation of the device, the force measured by the device is the resultant force of the tangential friction force of the sample, the inertial force of the sliding block, the friction force between the driving shaft and the pipe wall, and the like, and none of the forces can be measured alone. Therefore, it is difficult to accurately measure the tangential friction force. SUMMARY

[0004] In order to solve the above problems, the present application provides a tangential fretting wear experimental device for simulating a high-temperature metal liquid environment, which can provide stable and reliable normal loads and measure more real and reliable tangential friction forces.

[0005] The specific scheme of the present application is as follows: A tangential fretting wear experimental device for simulating a high-temperature metal liquid environment, comprising: a high-temperature kettle; a heating and temperature control mechanism for controlling the temperature in the high-temperature kettle; a lower clamp and an upper clamp located in the high-temperature kettle, each clamp clamping one fretting sample, and after clamping, the two fretting samples abut; a driving shaft arranged horizontally, one end of the driving shaft being fixedly connected with the lower clamp, and the other end of the driving shaft penetrating through the side wall of the high-temperature kettle and being in sliding seal connection with the side wall; a first power device for pushing the driving shaft to move linearly reciprocally in the horizontal plane; a friction force transmission shaft parallel to the driving shaft, one end of the friction force transmission shaft being located in the gas phase of the high-temperature kettle, and the other end of the friction force transmission shaft penetrating through the side wall of the high-temperature kettle and being in sliding connection with the side wall; a hinged shaft located in the high-temperature kettle, one end of the hinged shaft being hingedly connected with the friction force transmission shaft via a rotating shaft, and the other end of the hinged shaft being connected with the upper clamp; A friction force measuring mechanism for measuring the axial force on a friction force transmission shaft; A loading rod vertically arranged and freely movable in the axial direction, the center line of which passes through the abutting area of the two abrasion samples; A shaft pressing mechanism for applying axial force to the loading rod; Wherein, the driving shaft, the articulated shaft and the loading rod are located in the same vertical plane, and the upper clamp is located above the lower clamp.

[0006] As a specific embodiment of the present application, it further comprises a parallelogram structure formed by four rods hingedly connected in sequence, the parallelogram structure, the articulated shaft and the friction force transmission shaft are located in the same plane, the end of the articulated shaft away from the friction force transmission shaft is parallel to and fixedly connected with one side of the parallelogram structure, the bottom of the parallelogram structure is fixedly connected with the upper clamp, and the lower end of the loading rod is opposite to the top of the parallelogram structure. In this way, the abutting area of the two abrasion samples can be ensured not to change with temperature, and the influence of different temperatures on friction can be measured.

[0007] As a specific embodiment of the present application, the driving shaft is connected with the sidewall of the high-temperature kettle through a sealing mechanism, and the sealing mechanism comprises: A first shaft sleeve horizontally arranged, one end of which passes through the sidewall of the high-temperature kettle and is sealingly connected therewith, and the driving shaft is located in the first shaft sleeve and is in clearance fit with the first shaft sleeve; A sealing bellows located at the end of the first shaft sleeve away from the high-temperature kettle, one end of which is sealingly connected with the first shaft sleeve and the other end is sealingly connected with the driving shaft; An electric heating wire for heating the liquid metal between the driving shaft and the first shaft sleeve; A thermocouple for measuring the temperature of the liquid metal between the driving shaft and the first shaft sleeve.

[0008] The present application adopts a sealing bellows to achieve 100% sealing, and through the cooperation of the thermocouple and the electric heating wire, the temperature of the first shaft sleeve can be controlled to be slightly higher than the freezing point but much lower than the temperature in the high-temperature kettle, which is conducive to reducing the temperature of the sealing bellows while ensuring the normal movement of the driving rod, thereby prolonging the service life of the sealing bellows.

[0009] As a specific embodiment of the present application, the friction force measuring mechanism comprises: A second shaft sleeve horizontally arranged, one end of which is located in the gas phase of the high-temperature kettle and the other end passes through the sidewall of the high-temperature kettle and is sealingly connected therewith; the friction force transmission shaft is arranged in the second shaft sleeve; A steel ball sleeve located between the second shaft sleeve and the friction force transmission shaft, for reducing the resistance of the movement of the friction force transmission shaft; A cooling water jacket located on the outer wall of the second shaft sleeve; A fixed rod coaxially arranged with the friction force transmission shaft, the position of the fixed rod is fixed; The piezoelectric force sensor is arranged between the fixed rod and the friction transmission shaft and abuts against the two; The present application sets a steel ball sleeve between the second shaft sleeve and the friction transmission shaft, which can greatly reduce the friction force on the friction transmission shaft and reduce the gas leakage in the high-temperature kettle.

[0010] As a specific embodiment of the present application, the shaft pressing mechanism comprises: The weight; The linear ball guide rail comprises: The second linear guide rail is vertically arranged and fixed on the upper end surface of the high-temperature kettle; The L-shaped slider is slidably connected to the second linear guide rail through balls, and the upper end of the loading rod is fixedly connected to the L-shaped slider and the lower end penetrates the upper end surface of the high-temperature kettle and is matched with the gap therebetween; The weight is detachably placed on the L-shaped slider.

[0011] As a specific embodiment of the present application, it further comprises: The position sensor is used to collect the position information of a part of the driving shaft; The second controller is used to receive the information of the position sensor and analyze the stroke of the driving shaft, and then adjust the load of the first power device according to the difference between the actual stroke and the preset stroke. Advantages

[0012] In the present application, the friction transmission shaft is connected to the upper clamp through the hinge shaft, the upper clamp can transmit the vertical and horizontal forces, and the size and direction of the force will not change during transmission, so the axial force of the loading rod can be used to accurately determine the pressure between the two abrasion samples, the reciprocating movement of the driving shaft drives the two abrasion samples to rub, the friction force of the two abrasion samples is the horizontal force, the upper clamp will not move horizontally during the experiment, and the horizontal force acting on the upper clamp is only one, i.e. the friction force of the two abrasion samples, so the axial force of the friction transmission shaft can be used to accurately determine the friction force between the abrasion samples. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective structural schematic view of a tangential fretting wear experimental device in a high-temperature metal liquid environment in an embodiment of the present application; Figure 2 is Figure 1 a front view of Figure 3 is Figure 2 an enlarged view of the A part in Figure 4 is Figure 1Structure diagram of the high-temperature kettle; Figure 5 is Figure 1 Structure diagram of the relative position of the middle driving shaft, friction transmission shaft and loading rod; Figure 6 is Figure 1 Structure diagram of the upper clamp and lower clamp clamping the abrasion sample; Figure 7 is Figure 1 Structure diagram of the shaft pressing mechanism; Figure 8 is Figure 1 Structure diagram of the sealing mechanism; Figure 9 Structure diagram of the articulated shaft and parallelogram structure in another embodiment of the present application; In the figure, high-temperature kettle 100; kettle cover 101; heat preservation cotton 110; support shell 120; abrasion sample 201; lower clamp 210; upper clamp 220; fixed seat 230; driving shaft 310; friction transmission shaft 320; articulated shaft 321; loading rod 330; first power equipment 400; second shaft sleeve 510; steel ball sleeve 520; piezoelectric force sensor 530; fixed rod 540; cooling water sleeve 550; ceramic heating ring 600; shaft pressing mechanism 700; second linear guide rail 710; L-shaped slider 720; weight 730; sealing mechanism 800; first shaft sleeve 810; sealing bellows 820; electric heating wire 830; thermocouple 840; heat insulation material 850; protective shell 860; cooling fin 870; position sensor 880; parallelogram structure 900. DETAILED DESCRIPTION

[0014] The present application will be further described in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present application are not limited thereto.

[0015] Please refer to Figures 1-8The application shows the structure of a specific embodiment of the tangential fretting wear test device in a high-temperature molten metal environment. The test device comprises a base, a support frame, a high-temperature furnace 100, a lower clamp 210, an upper clamp 220, a driving shaft 310, a friction force transmission shaft 320, a loading rod 330, a first power device 400, a friction force measuring mechanism, a ceramic heating ring 600, a shaft pressing mechanism 700 and a sealing mechanism 800. The base and the support frame are used to bear and support various device components, the high-temperature furnace 100 is used to store lead-bismuth alloy and a tubular abrasion sample 201, and a detachable furnace cover 101 is arranged at the top of the high-temperature furnace 100 for facilitating the access of the abrasion sample 201 and the like to the high-temperature furnace 100; the heating and temperature control mechanism is used to control the temperature in the high-temperature furnace 100, so that the lead-bismuth alloy is liquefied and the liquid alloy temperature is maintained stable during the experiment; the upper clamp 220 and the lower clamp 210 are both located in the high-temperature furnace 100, each clamping one abrasion sample 201, and after clamping, the two abrasion samples 201 abut and are immersed in the liquid alloy, and one purpose of the test device is to measure the friction force between the two abrasion samples 201; the driving shaft 310 is horizontally arranged, one end of which is fixedly connected with the lower clamp 210, and the other end penetrates through the side wall of the high-temperature furnace 100 and is sealingly connected therewith; the first power device 400 is used to push the driving shaft 310 to move linearly back and forth in the horizontal plane, so that the two abrasion samples 201 rub against each other; the friction force transmission shaft 320 is located above the driving shaft 310 and parallel to the driving shaft 310; the hinged shaft 321 is located in the high-temperature furnace 100, one end of which is connected with one end of the friction force transmission shaft 320 located in the high-temperature furnace 100, and the other end is fixedly connected with the upper clamp 220; the friction force measuring mechanism is used to measure the axial force borne by the friction force transmission shaft 320, i.e. the friction force between the two abrasion samples 201; the loading rod 330 is vertically arranged and can freely move along the axial direction, and the center line thereof penetrates through the abutting region of the two abrasion samples 201; and the shaft pressing mechanism 700 is used to apply an axial force to the loading rod 330. In the application, the upper clamp 220 is located above the lower clamp 210, the friction force transmission shaft 320 is located above the abutting region of the two abrasion samples 201, and the driving shaft 310, the friction force transmission shaft 320, the loading rod 330 and the hinged shaft 321 are located in the same vertical plane, so that when the loading rod 330 moves downward, it will abut against the hinged shaft 321, the upper clamp 220 or the abrasion sample 201 clamped by the upper clamp 220, thereby being able to transmit the pressure to the abutting region of the abrasion sample 201, the pressure between the two abrasion samples 201 can be adjusted by the shaft pressing mechanism 700, the first power device 400 drives the driving shaft 310 to move back and forth, thereby driving the abrasion sample 201 clamped by the lower clamp 210 to move back and forth, the friction force borne by the two abrasion samples 201 is a pair of interaction forces, but the upper clamp 220 does not move during the experiment, and it only bears the friction force in the horizontal direction, therefore, the axial force measured by the friction force measuring mechanism is the friction force borne by the abrasion sample 201.

[0016] The specific configuration of the heating and temperature control mechanism in the application can be selected as required, for example, in some embodiments, the heating and temperature control mechanism comprises a ceramic heating ring 600, a thermocouple and a first controller, the ceramic heating ring 600 is arranged at the bottom of the high-temperature kettle 100 and is used for heating the high-temperature kettle 100, the thermocouple is used for detecting the temperature of the liquid alloy, and the first controller receives the temperature data of the thermocouple and controls the heating load of the ceramic heating ring 600 according to the difference between the measured temperature and the preset temperature.

[0017] In use, the temperature of the liquid alloy is relatively high. In some embodiments, the high-temperature kettle 100 can be provided with a heat preservation and anti-scald component to save energy and protect the operator, for example Figure 4 As shown in the figure, the heat preservation cotton 110 is arranged outside the high-temperature kettle 100 to reduce heat loss. Please note that when the heating component (such as the ceramic heating ring 600) of the heating and temperature control mechanism is located outside the high-temperature kettle 100, the high-temperature kettle 100 and the heating component can be wrapped together, and the heat preservation cotton 110 should not be filled between the high-temperature kettle 100 and the heating component to avoid affecting heat transfer; the support shell 120 is arranged outside the heat preservation cotton 110, the support shell 120 closely adheres to the heat preservation cotton 110, thereby playing a role of restraining and fixing the heat preservation cotton 110, in addition, in some embodiments, the support shell 120 is square, and four circumferential side walls thereof are respectively provided with triangular rib plates for fixedly connecting with the base to improve the stability during the operation of the equipment.

[0018] In the application, the lower clamp 210 bears the horizontal thrust of the driving shaft 310 and the vertical action force applied by the loading rod 330, the latter is easy to cause the free end of the driving shaft 310 to bend downward, therefore, support needs to be provided to the bottom of the lower clamp 210, in some embodiments, the bottom of the lower clamp 210 can be directly abutted against the bottom of the high-temperature kettle 100, in other embodiments, in order to reduce the abrasion to the bottom of the high-temperature kettle 100, a fixed seat 230 is fixed at the bottom of the high-temperature kettle 100, the fixed seat 230 is provided with a first linear guide rail extending along the axial direction of the driving shaft 310, and the bottom of the lower clamp 210 is provided with a sliding groove matched with the first linear guide rail, as Figure 6 As shown in the figure, the lower clamp 210 is located on the fixed seat 230, and the first linear guide rail is embedded in the sliding groove, therefore, the lower clamp 210 can be supported by the fixed seat 230 and guided to move linearly, thereby avoiding the swing of the free end of the driving shaft 310.

[0019] In the application, the driving shaft 310 is in sliding sealing connection with the sidewall of the high-temperature kettle 100, and the specific sealing mode can be selected according to the needs. In other embodiments, the driving shaft 310 is in sliding sealing connection with the sidewall of the high-temperature kettle 100 through a sealing mechanism 800, and the sealing mechanism 800 includes a first shaft sleeve 810, a sealing bellows 820, an electric heating wire 830, a thermocouple 840 and a heat insulation material 850. The first shaft sleeve 810 is horizontally arranged, one end of which penetrates through the sidewall of the high-temperature kettle 100 and is in sealing connection with the sidewall. The driving shaft 310 is sleeved in the first shaft sleeve 810 and is in clearance fit with the first shaft sleeve 810. The sealing bellows 820 is fixed to one end of the first shaft sleeve 810 away from the high-temperature kettle 100, one end of which is in sealing connection with the first shaft sleeve 810 and the other end is in sealing connection with the driving shaft 310, so as to avoid leakage of liquid metal. The electric heating wire 830 is used for heating the liquid metal between the driving shaft 310 and the first shaft sleeve 810, so as to avoid solidification. The thermocouple 840 is used for measuring the temperature of the liquid metal between the driving shaft 310 and the first shaft sleeve 810, so as to facilitate adjustment of the load of the electric heating wire 830. The specific positions of the thermocouple 840 and the electric heating wire 830 can be set according to the needs. For example, in some embodiments, the electric heating wire 830 is arranged on the outer wall of the first shaft sleeve 810, and the thermocouple 840 is arranged on the first shaft sleeve 810 to feedback the surface temperature of the first shaft sleeve 810. The heat insulation material 850 (such as aerogel) is wrapped outside the electric heating wire 830 and is fixed by a protective shell 860, which is used for heat insulation and prevents heat loss. When the application is used, the temperature in the high-temperature kettle 100 is relatively high, such as 400℃ or 500℃. High temperature can easily damage the sealing components, such as the sealing bellows 820. Therefore, when used, the temperature in the first shaft sleeve 810 can be controlled at 200℃, which can prevent the solidification of the liquid lead bismuth inside and hinder the movement of the driving rod, and can also reduce the temperature of the sealing bellows 820 to protect the equipment.

[0020] In the application, the first power device 400 is used to provide linear reciprocating movement power for the driving shaft 310, and various existing power devices can meet this need, such as a voice coil motor. However, it should be noted that the driving shaft 310 is always in contact with the high-temperature liquid alloy in the experiment, which causes its own temperature to be relatively high, which can easily cause the first power device 400 to be damaged by heat. Therefore, in some embodiments, a heat sink 870 or a heat insulation sheet is arranged between the first power device 400 and the driving shaft 310 to prevent heat transfer to the first power device 400.

[0021] In use, the two abrasion samples 201 are arranged in a cross shape, and when the lower clamp 210 moves, it can drive the fixed abrasion sample 201 to move on the outer wall of the abrasion sample 201 fixed by the upper clamp 220, but if the stroke of the lower clamp 210 is too large to cause the two abrasion samples 201 to separate from each other, the abrasion sample 201 fixed by the upper clamp 220 will move downward, thereby hindering the lower clamp 210 from continuing to move reciprocally, that is, causing the experiment to be unable to continue, therefore, it is necessary to control the stroke of the lower clamp 210, and in some embodiments, a position sensor 880 (grating ruler) and a second controller are arranged, the position sensor 880 is used to collect the position information of a part of the driving shaft 310, thereby obtaining the stroke of the driving shaft 310, the second controller receives the position information of the driving shaft 310 and analyzes to obtain the stroke of the driving shaft 310, and then adjusts the load of the first power equipment 400 according to the difference between the actual stroke and the preset stroke.

[0022] In the present application, the loading rod 330 is used to provide vertical pressure (also known as normal force) for the abrasion sample 201, and the friction force transmission shaft 320 is used to measure the friction force between the two abrasion samples 201 by means of its weak axial movement, in order to reduce the influence of the loading rod 330 on the axial movement of the friction force transmission shaft 320, in some examples, a roller or a ball is arranged at one end of the loading rod 330 in the high-temperature kettle 100.

[0023] In the present application, the shaft pressing mechanism 700 is used to apply axial force to the loading rod 330, in order to accurately measure the axial force, in some examples, as shown in Figure 7 The shaft pressing mechanism 700 includes a linear ball guide and a weight 730, the linear ball guide includes a second linear guide rail 710 and an L-shaped sliding block 720, the L-shaped sliding block 720 is in contact with the second linear guide rail 710 through balls and moves along the second linear guide rail 710, the friction between them is small, the second linear guide rail 710 is vertically arranged and fixed on the upper end face of the high-temperature kettle 100, therefore, the L-shaped sliding block 720 can move freely in the vertical direction, the upper end of the loading rod 330 is fixed on the L-shaped sliding block 720, the lower end passes through the upper end face of the high-temperature kettle 100 and is matched with the gap therebetween, and the weight 730 (counterweight) is placed on the L-shaped sliding block 720, so that the acting force applied to the loading rod 330 can be adjusted by adjusting the weight 730 on the L-shaped sliding block 720, and during the experiment, a plurality of weights 730 can be used to facilitate the adjustment of the load.

[0024] In the present application, the friction force measuring mechanism is used to measure the axial force borne by the friction force transmission shaft 320, and in use, the friction force transmission shaft 320 is located above the liquid level, and there is no problem of leakage of liquid metal, therefore, the friction force transmission shaft 320 can be slidably connected with the side wall of the high-temperature kettle 100, so as to reduce the friction force of the movement of the friction force transmission shaft 320. In some examples, as shown in Figures 2-4As shown, the friction force measuring mechanism includes a second shaft sleeve 510, a steel ball sleeve 520, a piezoelectric force sensor 530, a fixed rod 540 and a cooling water jacket 550. The second shaft sleeve 510 is horizontally arranged, one end of which penetrates the sidewall of the high-temperature kettle 100 and is sealingly connected thereto. The friction force transmission shaft 320 is sleeved in the second shaft sleeve 510. The steel ball sleeve 520 is located between the second shaft sleeve 510 and the friction force transmission shaft 320, thereby reducing the resistance of the friction force transmission shaft 320 to move. The fixed rod 540 is coaxially arranged with the friction force transmission shaft 320 at a certain distance. The fixed rod 540 is fixed in position. The piezoelectric force sensor 530 is located between the fixed rod 540 and the friction force transmission shaft 320 and abuts against both, thereby being able to measure the friction force transmitted by the friction force transmission shaft 320. In addition, in order to prevent the friction force transmission shaft 320 from rotating, the cross sections of the friction force transmission shaft 320, the steel ball sleeve 520 and the second shaft sleeve 510 can be made into non-circular shapes, such as a square.

[0025] In the present application, the two abrasion samples 201 are tubular or arc-shaped, and the abutting areas of the two are small (approximately point contact). When the test temperature changes, the outer diameter of the abrasion sample 201 changes with the temperature. Since the hinge shaft 321 is hinged to the friction force transmission shaft 320, the free end of the upper clamp 220 rotates around the hinge point, thereby driving the abrasion sample 201 clamped thereby to rotate, so that the abrasion area of the abrasion sample 201 clamped by the upper clamp 220 changes, and the influence of temperature as a single variable on the friction force cannot be accurately determined. Therefore, in some examples, as shown in FIG. 6, a parallelogram structure 900 is arranged, which is formed by four rods hingedly connected in sequence. The parallelogram structure 900, the hinge shaft 321 and the friction force transmission shaft 320 are located in the same plane. One end of the hinge shaft 321 away from the friction force transmission shaft 320 is fixedly connected in parallel with one side of the parallelogram structure 900. The bottom side of the parallelogram structure 900 is fixedly connected with the upper clamp 220. In this way, when the hinge shaft 321 rotates, the upper side and the lower side of the parallelogram structure 900 can still maintain horizontal, thereby ensuring that the abrasion sample 201 clamped by the upper clamp 220 moves vertically when the outer diameter of the abrasion sample 201 changes, and the abrasion area does not change. Figure 9

[0026] In addition, in some embodiments, an oxygen sensor and a gas passage are arranged on the kettle cover 101 for real-time feedback and control of the oxygen content in the liquid metal environment in the kettle body. The gas passage can be externally connected to high-purity argon gas, argon-oxygen mixed gas and argon-hydrogen mixed gas to control the oxygen content of the liquid metal in the kettle body. In some embodiments, the kettle cover 101 is also provided with a hydraulic lifting mechanism and a guide mechanism for lifting the kettle cover 101.

[0027] ​The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the embodiments of the present application, which should be covered within the protection scope of the present application.

Claims

1. An experimental apparatus for simulating tangential fretting wear in a high-temperature liquid metal environment, characterized in that, include: High temperature autoclave; Heating and temperature control mechanism for controlling the temperature inside the high-temperature reactor; The lower clamp and the upper clamp are located inside the high-temperature reactor. Each clamp holds one abrasion sample, and the two abrasion samples are in contact after clamping. A horizontally arranged drive shaft has one end fixedly connected to the lower clamp, and the other end passes through the side wall of the high-temperature reactor and is slidably and sealingly connected to it. A first power device for propelling the drive shaft to reciprocate linearly in a horizontal plane; A friction drive shaft parallel to the drive shaft has one end located in the gas phase of the high-temperature reactor and the other end passing through and slidably connected to the side wall of the high-temperature reactor. The hinge shaft located inside the high-temperature reactor has one end hinged to the friction drive shaft via a rotating shaft, and the other end connected to the upper clamp. Friction measuring mechanism for measuring the axial force on the friction drive shaft; A vertically arranged loading rod that can move freely along the axial direction has its centerline passing through the contact area of ​​two abrasive specimens. Axial compression mechanism for applying axial force to the loading rod; The drive shaft, the hinge shaft, and the loading rod are located in the same vertical plane, and the upper clamp is located above the lower clamp.

2. The experimental device for simulating tangential fretting wear in a high-temperature liquid metal environment according to claim 1, characterized in that, It also includes a parallelogram structure formed by four rods hinged end to end. The parallelogram structure, the hinge shaft, and the friction drive shaft are located in the same plane. The end of the hinge shaft opposite to the friction drive shaft is parallel to and fixedly connected to one side of the parallelogram structure. The bottom edge of the parallelogram structure is fixedly connected to the upper clamp. The lower end of the loading rod is directly opposite the top edge of the parallelogram structure.

3. The experimental device for simulating tangential fretting wear in a high-temperature liquid metal environment according to claim 1, characterized in that, The drive shaft is slidably and sealed to the side wall of the high-temperature reactor via a sealing mechanism, the sealing mechanism comprising: A horizontally arranged first bushing has one end passing through and sealingly connected to the side wall of the high-temperature reactor, and the drive shaft is located inside the first bushing and is clearance-fitted with it. The sealing bellows located at the end of the first bushing away from the high-temperature vessel has one end sealed to the first bushing and the other end sealed to the drive shaft. An electric heating wire for heating the liquid metal between the drive shaft and the first bushing; Thermocouple used to measure the temperature of the liquid metal between the drive shaft and the first bushing.

4. The experimental apparatus for simulating tangential fretting wear in a high-temperature liquid metal environment according to claim 1, characterized in that, The friction force measuring mechanism includes: A horizontally arranged second bushing has one end located in the gas phase of the high-temperature reactor and the other end passing through and sealingly connected to the side wall of the high-temperature reactor; the friction drive bushing is disposed inside the second bushing. A ball bearing sleeve located between the second bushing and the friction drive shaft; The cooling water jacket is located on the outer wall of the second bushing; A fixed rod is arranged coaxially with the friction drive shaft, and the position of the fixed rod is fixed. A piezoelectric force sensor located between and in contact with the fixed rod and the friction drive shaft.

5. The experimental apparatus for simulating tangential fretting wear in a high-temperature liquid metal environment according to claim 1, characterized in that, The axial compression mechanism includes: Weights; Linear ball guides, including: A second linear guide rail is vertically arranged and fixed on the upper surface of the high-temperature reactor; An L-shaped slider is slidably connected to the second linear guide rail via ball bearings. The upper end of the loading rod is fixedly connected to the L-shaped slider, and the lower end passes through the upper end face of the high-temperature reactor and is clearance-fitted with it. The weight is detachably placed on the L-shaped slider.

6. The experimental apparatus for simulating tangential fretting wear in a high-temperature liquid metal environment according to claim 1, characterized in that, Also includes: A position sensor is used to collect position information of a certain part of the drive shaft; The second controller is used to receive information from the position sensor and analyze it to obtain the stroke of the drive shaft, and then adjust the load of the first power equipment according to the difference between the actual stroke and the preset stroke.

Images