Tangential and punching composite fretting abrasion experimental device in high-temperature liquid metal environment

Abstract

The invention discloses a tangential and punching composite micro-motion abrasion experiment device in a high-temperature liquid metal environment, which comprises a test kettle, a melting kettle, a rack, a heat tracing pipeline unit, a normal force loading module and a micro-motion module, and is characterized in that the rack plays a supporting role; the melting kettle is arranged on one side of the rack and is used for melting a metal solid into a liquid state under a preset condition; the test kettle is arranged on the other side of the rack; the test kettle unit is used for constructing a sample together with the normal force loading module and the micro-motion module to perform a micro-motion abrasion experiment in a liquid metal environment; and the heat tracing pipeline unit is used for guiding molten liquid metal in the melting kettle unit into the test kettle unit.

Description

Technical Field

[0001] The invention relates to the field of micro-motion friction technology, and more specifically to a tangential and punching composite micro-motion abrasion experimental device in a high-temperature liquid metal environment. Background Art

[0002] As the demand for nuclear power continues to grow, the international nuclear engineering community has proposed the development of the fourth-generation nuclear power system. These include lead reactors, sodium reactors, supercritical water reactors, gas reactors, etc. Among them, lead reactors and sodium reactors are both high-temperature liquid metals. Compared with gas reactors and water-cooled reactors, they have higher thermal efficiency and energy density, better neutron physical properties, higher safety, and reduced nuclear waste generation. Among them, the lead-bismuth reactor in the lead reactor is expected to become the first nuclear energy system to achieve industrial demonstration and commercial application due to its unique advantages.

[0003] Lead-bismuth alloy (LBE) has a higher neutron scattering cross section and a lower neutron absorption cross section, better neutron economy, and a stronger ability to breed nuclear fuel. The lead-bismuth cooled reactor is one of the six preferred reactor types for the fourth generation nuclear energy system. It has the advantages of good inherent safety, high energy density, and long operating life. It has been one of the research hotspots in the field of small nuclear power in recent years.

[0004] Although there are many advantages in choosing liquid metal as reactor coolant, the structural materials of nuclear reactors face many unfavorable factors when serving in high-temperature liquid metal environment, such as accelerated failure of structural materials in high-temperature environment, damage to materials caused by complex alternating loads during reactor operation, oxidation of liquid metal itself, and corrosion of structural materials, which seriously restrict the development of lead-bismuth fast reactors. Among them, the micro-abrasion between the cladding tubes of fuel rods is one of the main reasons for the failure of fuel assemblies. Specifically, when the reactor is running, the coolant flows from bottom to top along the direction of the fuel rods through the surface of the fuel cladding tubes. Due to the large flow rate, the fuel rods in it are disturbed and vibrate slightly, resulting in micro-friction wear near the contact point of the cladding tube. In severe cases, it will cause damage to the fuel rods and leakage of radioactive products, thus affecting the safe operation of nuclear power plants. In this regard, it is necessary to study the micro-abrasion behavior of structural materials in high-temperature liquid metal environment and comprehensively measure the coupling factors of mechanical removal, high-temperature thermal effect and liquid metal chemical corrosion, deeply explore the accelerated failure mechanism of liquid metal on materials, and systematically reveal the tribochemical failure mechanism of materials in liquid metal environment.

[0005] However, the service environment of fuel assemblies under high-temperature liquid metal is extremely harsh, which is specifically reflected in dynamic sealing under high temperature, high pressure and high frequency, accurate collection of real-time data and accurate control of working parameters. At present, only the Russian Academy of Sciences and KIT in Germany have conducted similar research on lead piles in 2008 and 2012 respectively, while there are still few micro-motion wear tests under simulated service conditions in China.

[0006] The Chinese patent publication number "CN117268896A" discloses a lead-bismuth environment micro-motion wear test device, which can simulate the flowing liquid lead-bismuth environment and achieve a certain degree of adaptive line contact tangential micro-motion. However, due to the complex internal fixture and large volume, it cannot guarantee the accuracy of the micro-motion amplitude, and its loading has no feedback adjustment, so it is difficult to guarantee the accuracy of long-term operation.

[0007] The Chinese patent publication number "CN117347209A" discloses a micro-motion corrosion and wear testing machine suitable for high-temperature lead-bismuth environment, which can feedback adjust the displacement amplitude and normal load, but its internal fixture is too complicated and large in size, just like "CN117268896A".

[0008] The Chinese patent publication number "CN218601078U" discloses a composite fretting wear test device for liquid lead-bismuth environment. The test device uses annular specimens and sheet specimens for testing. The annular specimens and sheet specimens are respectively installed on two specimen fixtures. One specimen fixture drives the outer wall of the annular specimen to press against the sheet specimen, and the other specimen fixture drives the sheet specimen to reciprocate at high speed, thereby completing the fretting wear test. However, its internal components are all in a suspended state, and it is difficult to ensure stability when operating in high-temperature lead-bismuth for a long time. Summary of the invention

[0009] The purpose of the present invention is to provide a tangential and punching composite micro-motion abrasion experimental device in a high-temperature liquid metal environment, in order to solve the technical problems in the background technology.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A tangential and punching composite micro-motion abrasion experimental device in a high-temperature liquid metal environment comprises: a test kettle, a melting kettle, a frame, a heating pipe unit, a normal force loading module, a micro-motion module, and the frame plays a supporting role; the melting kettle is arranged on one side of the frame, and is used to melt the metal solid into liquid under preset conditions; the test kettle is arranged on the other side of the frame, and the test kettle unit is used to construct a sample together with the normal force loading module and the micro-motion module to carry out a micro-motion abrasion experiment in a liquid metal environment; the heating pipe unit is used to guide the melted liquid metal in the melting kettle unit into the test kettle unit.

[0012] In some embodiments, the melting kettle includes a melting kettle body and a melting kettle cover that cooperate with each other, wherein the melting kettle body structure includes a melting kettle base, melting kettle insulation cotton, a melting kettle bottom heater, a melting kettle wall heater, a melting kettle stainless steel outer wall and a melting kettle inner tank, the melting kettle base is connected and fixed to the frame, the melting kettle inner tank is connected and fixed to the melting kettle base, and a melting kettle bottom heater and a melting kettle wall heater are respectively arranged on the bottom and outer wall of the melting kettle inner tank, the melting kettle insulation cotton is used to wrap the melting kettle bottom heater and the melting kettle wall heater, and the melting kettle stainless steel outer wall is used to wrap the entire melting kettle body.

[0013] In some embodiments, the molten kettle cover includes a molten kettle cover bottom plate, a molten kettle cover top plate, a molten kettle support rod, a molten kettle hanging ring, a molten kettle pressure sensor, a molten kettle thermocouple sensor, a molten kettle oxygen sensor, a molten kettle liquid level sensor, a molten kettle air inlet pipe, a molten kettle exhaust pipe, and a molten kettle air blast pipe, wherein the molten kettle pressure sensor, the molten kettle thermocouple sensor, the molten kettle oxygen sensor, and the molten kettle liquid level sensor are arranged on the molten kettle cover bottom plate; the molten kettle air inlet pipe is used to convey a mixture of Ar, Ar / O2 and Ar / H2 with an adjustable flow ratio into the molten kettle, and ensure the dissolved oxygen concentration in the kettle under the feedback of the molten kettle oxygen sensor; the molten kettle air blast pipe is used to increase the air pressure value in the kettle by introducing high-purity Ar into the molten kettle; the molten kettle cover bottom plate and the molten kettle cover top plate are connected by the molten kettle support rod, and an installation space is formed between the molten kettle cover bottom plate and the molten kettle cover top plate.

[0014] In some embodiments, the test kettle includes a test kettle body and a test kettle cover that cooperate with each other, wherein the test kettle body structure includes a test kettle base, a test kettle thermal insulation cotton, a test kettle bottom heater, a test kettle stainless steel outer wall and a test kettle inner tank, the test kettle base is connected and fixed to the frame, the test kettle inner tank is connected and fixed to the test kettle base, a test kettle bottom heater is arranged at the bottom of the test kettle inner tank, the thermal insulation cotton wraps the test kettle inner tank and the test kettle bottom heater, and the test kettle stainless steel outer wall is used to wrap the entire test kettle body.

[0015] In some embodiments, the test kettle cover includes a test kettle cover bottom plate, a test kettle cover top plate, a test kettle support rod, a test kettle hanging ring, a test kettle pressure sensor, a test kettle thermocouple sensor, a test kettle oxygen sensor, a test kettle liquid level sensor, a test kettle air inlet pipe, and a test kettle exhaust pipe, wherein the test kettle pressure sensor, the test kettle thermocouple sensor, the test kettle oxygen sensor, and the test kettle liquid level sensor are arranged on the kettle cover bottom plate, and the test kettle air inlet pipe is used to transport a mixture of high-purity Ar, Ar / O2 and Ar / H2 with adjustable flow ratio into the test kettle, thereby ensuring the dissolved oxygen concentration in the kettle under the feedback of the test kettle oxygen sensor.

[0016] In some embodiments, a normal force loading module is installed on the lid of a test kettle, wherein the normal force loading module includes a normal force loading unit, a normal force sensor, a normal force adapter, a normal force connecting block, a normal force linear bearing, a normal force water cooling jacket, a normal force transmission shaft and a normal force grinding pair fixture; wherein the normal force loading unit and the normal force sensor are connected by bolts, and the normal force adapter is bolted to the normal force connecting block; the left and right normal force transmission shafts are designed as an integral whole, and the normal force grinding pair fixture is installed between the left and right normal force transmission shafts, and the normal force transmission shaft is positioned by a normal force linear bearing to ensure the accuracy of loading; the normal force linear bearing is connected to the normal force water cooling jacket by bolts, and the normal force water cooling jacket is fixed to the bottom plate of the test kettle lid by bolts.

[0017] In some embodiments, the micro-motion module includes a voice coil motor base, a voice coil motor, a connecting plate, a connecting shaft, a heat shield, a linear bearing, a water cooling jacket, a sleeve, a transmission shaft, a guide rail, a cover plate, a slider, a micro-motion rod, and a sample fixture;

[0018] The voice coil motor is fixed to the voice coil motor base by screws, and the voice coil motor base is fixed to the frame; the connecting plate is fixed to the voice coil motor by bolts, the connecting plate is connected to one end of the connecting shaft, and the other end of the connecting shaft, the heat insulation plate and the adapter block are matched by bolts; the linear bearing is fixed to one end of the water cooling jacket by bolts, the inside of the water cooling jacket is a sleeve, which is welded to the inner wall of the test kettle, and threaded holes are punched at both ends of the transmission shaft, one end is connected to the adapter block, and the other end is connected to the slider, the guide rail is fixed to the cover plate by screws, and the cover plate is fixed to the bottom plate of the test kettle cover by bolts; the slider is provided with a threaded hole for fixing the micro-motion rod, and the sample fixture and the micro-motion rod are bolted.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The normal loading mechanism of the present invention is a composite mechanism, which can provide two motion modes and has more functions;

[0021] 2. The present invention has high automation and high working efficiency;

[0022] 3. The structure of the invention is simple and reasonable, the overall stability is good, and the operation is convenient;

[0023] 4. The present invention can be used in different liquid metal environments;

[0024] 5. The experimental parameter indicators of the present invention are rich, with a wide range and high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment provided by the present invention;

[0026] Figure 2 and Figure 3 is a schematic diagram of a melting kettle;

[0027] Figure 4 and Figure 5 is a schematic diagram of the test kettle;

[0028] Figure 6 is a schematic diagram of the normal force loading model;

[0029] Figure 7 It is the intention of the micro-motion module;

[0030] Figure 8 This is a schematic diagram of the grinding pair. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0032] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be 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 this application can be understood according to specific circumstances.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0036] The following will be combined Figure 1-Figure 8 , a tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0037] Embodiment 1:

[0038] See also Figure 1-Figure 8 A tangential and punching composite micro-motion abrasion experimental device in a high-temperature liquid metal environment, comprising: a test kettle 1, a melting kettle 2, a frame 3, a heating pipe unit, a normal force loading module 7, a micro-motion module 6, and the frame plays a supporting role; the melting kettle is arranged on one side of the frame, and is used to melt the metal solid into liquid under preset conditions; the test kettle is arranged on the other side of the frame, and the test kettle unit is used to construct a sample together with the normal force loading module and the micro-motion module to conduct micro-motion abrasion experiments in a liquid metal environment; the heating pipe unit is used to guide the melted liquid metal in the melting kettle unit to the test kettle unit. The heating pipe unit includes a heating pipe 4 and a V-type ball valve 5. The melting kettle and the test kettle are connected by a heating pipe, and the heating pipe is welded to the bottom of the two kettles. The on-off of the heating pipe is controlled by a V-type ball valve.

[0039] The melting kettle comprises a melting kettle body 14 and a melting kettle cover which cooperate with each other, wherein the melting kettle body is mainly used to store high-temperature liquid metal and maintain a certain temperature. The melting kettle body structure comprises a melting kettle base 23, a melting kettle heat insulation cotton 21, a melting kettle bottom heater 25, a melting kettle wall heater 20, a melting kettle stainless steel outer wall 22 and a melting kettle inner tank 24, wherein the melting kettle base is connected and fixed to the frame, the melting kettle inner tank is connected and fixed to the melting kettle base, and a melting kettle bottom heater and a melting kettle wall heater are arranged on the bottom and outer wall of the melting kettle inner tank, respectively, the melting kettle heat insulation cotton is used to wrap the melting kettle bottom heater and the melting kettle wall heater, and the melting kettle stainless steel outer wall is used to wrap the entire melting kettle body.

[0040] The molten kettle cover includes a molten kettle cover bottom plate 13, a molten kettle cover top plate 8, a molten kettle support rod 9, a molten kettle hanging ring 19, a molten kettle pressure sensor 11, a molten kettle thermocouple sensor 15, a molten kettle oxygen sensor 10, a molten kettle liquid level sensor 17, a molten kettle air inlet pipe 12, a molten kettle exhaust pipe 16, and a molten kettle air blow pipe 18, wherein the molten kettle pressure sensor, the molten kettle thermocouple sensor, the molten kettle oxygen sensor, and the molten kettle liquid level sensor are arranged on the molten kettle cover bottom plate, and their function is to monitor the dissolved oxygen concentration, temperature, pressure value, liquid level, etc. of the high-temperature liquid metal in the molten kettle in real time. The air inlet pipe of the molten kettle is used to transport a mixed gas of Ar, Ar / O2 and Ar / H2 with an adjustable flow ratio into the molten kettle, and ensure the dissolved oxygen concentration in the kettle under the feedback of the molten kettle oxygen sensor; the molten kettle air pipe is used to increase the gas pressure in the kettle by introducing high-purity Ar into the molten kettle. The bottom plate and the top plate of the molten kettle cover are connected by the molten kettle support rod, and an installation space is formed between the bottom plate and the top plate of the molten kettle cover.

[0041] In some embodiments, the test kettle includes a test kettle body 33 and a test kettle cover that cooperate with each other. The test kettle body is mainly used to temporarily store high-temperature liquid metal and maintain a certain temperature. After the test is completed, the high-temperature liquid metal will flow back to the molten kettle under the action of the liquid level difference. The test kettle body structure includes a test kettle base 40, a test kettle heat insulation cotton 38, a test kettle bottom heater 42, a test kettle stainless steel outer wall 39 and a test kettle liner 41. The test kettle base is connected and fixed to the frame, and the test kettle liner is connected and fixed to the test kettle base. A test kettle bottom heater is arranged at the bottom of the test kettle liner. The heat insulation cotton wraps the test kettle liner and the test kettle bottom heater. The test kettle stainless steel outer wall is used to wrap the entire test kettle body.

[0042] In some embodiments, the test kettle cover includes a test kettle cover bottom plate 37, a test kettle cover top plate 27, a test kettle support rod 28, a test kettle hanging ring 34, a test kettle pressure sensor 29, a test kettle thermocouple sensor 36, a test kettle oxygen sensor 30, a test kettle liquid level sensor 35, a test kettle air inlet pipe 32, and a test kettle exhaust pipe 31, wherein the test kettle pressure sensor, the test kettle thermocouple sensor, the test kettle oxygen sensor, and the test kettle liquid level sensor are arranged on the kettle cover bottom plate, and the test kettle air inlet pipe is used to transport a mixture of high-purity Ar, Ar / O2 and Ar / H2 with adjustable flow ratio into the test kettle, so as to ensure the dissolved oxygen concentration in the kettle under the feedback of the test kettle oxygen sensor.

[0043] In some embodiments, a normal force loading module is installed on the lid of a test kettle, wherein the normal force loading module includes a normal force loading unit 44, a normal force sensor 45, a normal force adapter 46, a normal force connecting block 47, a normal force linear bearing 51, a normal force water cooling jacket 52, a normal force transmission shaft 53 and a normal force grinding pair fixture 49; wherein the normal force loading unit and the normal force sensor are connected by bolts, and the normal force adapter is bolted to assemble it with the normal force connecting block; the left and right normal force transmission shafts are designed as an integral whole, and the normal force grinding pair fixture is installed between the left and right normal force transmission shafts, and the normal force transmission shaft is positioned by a normal force linear bearing to ensure the accuracy of loading; the normal force linear bearing is connected to the normal force water cooling jacket by bolts, and the normal force water cooling jacket is fixed to the bottom plate of the test kettle lid by bolts.

[0044] In some embodiments, the micro-motion module includes a voice coil motor base 60, a voice coil motor 61, a connecting plate 54, a connecting shaft 62, a heat shield 55, a linear bearing 64, a water cooling jacket 56, a sleeve 65, a transmission shaft 57, a guide rail 66, a cover plate 58, a slider 59, a micro-motion rod 67, and a sample fixture 68;

[0045] The voice coil motor is fixed to the voice coil motor base by screws, and the voice coil motor base is fixed to the frame; the connecting plate is fixed to the voice coil motor by bolts, and the connecting plate is connected to one end of the connecting shaft, and the other end of the connecting shaft, the heat insulation plate and the adapter block 63 are matched by bolts; the linear bearing is fixed to one end of the water cooling jacket by bolts, and the inside of the water cooling jacket is a sleeve, which is welded to the inner wall of the test kettle. Threaded holes are punched at both ends of the transmission shaft, one end is connected to the adapter block, and the other end is connected to the slider, the guide rail is fixed to the cover plate by screws, and the cover plate is fixed to the bottom plate of the test kettle cover by bolts; a threaded hole for fixing the micro-motion rod is provided on the slider, and the sample fixture and the micro-motion rod are bolted.

[0046] Figure 7The schematic diagram of the fixture shows that the tubular specimen is fixed by the specimen fixture, which is fixed to the micro-motion rod by bolts, and the slider drives the micro-motion rod to micro-move, thereby driving the specimen to micro-move. The grinding pair is fixed by the grinding pair fixture, which is fixed to the gasket 69 by screws. The contact angle between the specimen and the grinding pair can be changed by changing the angle of the installation gasket, so that both 90° orthogonal tangential micro-motion and 30° and 60° contact angle micro-motion tests can be realized.

[0047] This embodiment provides a fretting abrasion experimental device in a high-temperature liquid metal environment, which can simulate tangential fretting abrasion in a high-temperature liquid metal environment. The specific operating steps of the experiment are as follows:

[0048] Step 1: Set parameters of the high-temperature liquid metal in the molten kettle through the temperature control system and the oxygen control system to ensure that the temperature and dissolved oxygen concentration reach the specified values;

[0049] Step 2: Clamp the specimen and the grinding pair on their respective fixtures;

[0050] Step 3: Move the test kettle cover to a suitable position, assemble the kettle body and the kettle cover by bolting, and set the heating temperature of the test kettle by the temperature control system;

[0051] Step 4: When the temperature of the test kettle reaches the preset value, the V-type ball valve is opened through the control system, and high-purity Ar is introduced into the molten kettle through the air blast pipe to increase the air pressure in the kettle, thereby pressing the liquid metal into the test kettle along the heating pipe. When the liquid level sensor setting value is reached, the V-type ball valve is automatically closed, and ventilation into the molten kettle is stopped at the same time. At this time, the dissolved oxygen concentration of the liquid metal in the test kettle is adjusted through the oxygen control system;

[0052] Step 5: When the temperature of the liquid metal and the dissolved oxygen concentration in the test kettle reach the specified values, set the output normal force, the micro-motion amplitude and micro-motion frequency of the voice coil motor on the control system, and set the running time. After adjusting them to the set values, click "Enable" to start the voice coil motor.

[0053] Step 6: When the running time is over, stop heating the test kettle first, then open the V-type ball valve to allow the liquid metal in the test kettle to flow back to the molten kettle. After the temperature in the test kettle cools to room temperature, remove the screws between the test kettle body and the kettle cover, lift the kettle cover through the lifting module, and then take out the test sample.

[0054] Example 2

[0055] This embodiment provides a fretting abrasion experimental device in a high-temperature liquid metal environment, which can simulate punching and shearing compound fretting abrasion in a high-temperature liquid metal environment. The specific operating steps of the experiment are as follows:

[0056] Step 1: Set parameters of the high-temperature liquid metal in the molten kettle through the temperature control system and the oxygen control system to ensure that the temperature and dissolved oxygen concentration reach the specified values;

[0057] Step 2: Clamp the specimen and the grinding pair on their respective fixtures;

[0058] Step 3: Move the test kettle cover to a suitable position, assemble the kettle body and the kettle cover by bolting, and set the heating temperature of the test kettle by the temperature control system;

[0059] Step 4: When the temperature of the test kettle reaches the preset value, the V-type ball valve is opened through the control system, and high-purity Ar is introduced into the molten kettle through the air blast pipe to increase the air pressure in the kettle, thereby pressing the liquid metal into the test kettle along the heating pipe. When the liquid level sensor setting value is reached, the V-type ball valve is automatically closed, and ventilation into the molten kettle is stopped at the same time. At this time, the dissolved oxygen concentration of the liquid metal in the test kettle is adjusted through the oxygen control system;

[0060] Step 5: When the temperature of the liquid metal and the dissolved oxygen concentration in the test kettle reach the specified values, set the frequency of the vibrator, the impact force, the micro-motion amplitude and micro-motion frequency of the voice coil motor on the control system, and set the running time. After adjusting them to the set values, click "Enable" to start the vibrator;

[0061] Step 6: When the running time is over, stop heating the test kettle first, then open the V-type ball valve to allow the liquid metal in the test kettle to flow back to the molten kettle. After the temperature in the test kettle cools to room temperature, remove the screws between the test kettle body and the kettle cover, lift the kettle cover through the lifting module, and then take out the test sample.

[0062] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment, characterized in that: include: The test kettle, melting kettle, frame, heating pipe unit, normal force loading module, micro-motion module, and the frame play a supporting role; the melting kettle is arranged on one side of the frame, and is used to melt the metal solid into liquid under preset conditions; the test kettle is arranged on the other side of the frame, and the test kettle unit is used to construct a specimen together with the normal force loading module and the micro-motion module to carry out micro-motion abrasion experiment in a liquid metal environment; the heating pipe unit is used to guide the melted liquid metal in the melting kettle unit into the test kettle unit.

2. According to the tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment as described in claim 1, it is characterized in that: The melting kettle comprises a melting kettle body and a melting kettle cover which cooperate with each other, wherein the melting kettle body structure comprises a melting kettle base, melting kettle heat insulation cotton, a melting kettle bottom heater, a melting kettle wall heater, a melting kettle stainless steel outer wall and a melting kettle liner, the melting kettle base is connected and fixed to the frame, the melting kettle liner is connected and fixed to the melting kettle base, and a melting kettle bottom heater and a melting kettle wall heater are respectively arranged on the bottom and outer wall of the melting kettle liner, the melting kettle heat insulation cotton is used to wrap the melting kettle bottom heater and the melting kettle wall heater, and the melting kettle stainless steel outer wall is used to wrap the entire melting kettle body.

3. The tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment according to claim 2 is characterized in that: The molten kettle cover comprises a molten kettle cover bottom plate, a molten kettle cover top plate, a molten kettle support rod, a molten kettle hanging ring, a molten kettle pressure sensor, a molten kettle thermocouple sensor, a molten kettle oxygen sensor, a molten kettle liquid level sensor, a molten kettle air inlet pipe, a molten kettle exhaust pipe and a molten kettle air blast pipe, wherein the molten kettle pressure sensor, the molten kettle thermocouple sensor, the molten kettle oxygen sensor and the molten kettle liquid level sensor are arranged on the molten kettle cover bottom plate; the molten kettle air inlet pipe is used for conveying a mixed gas of Ar, Ar / O2 and Ar / H2 with an adjustable flow ratio into the molten kettle, and ensuring the dissolved oxygen concentration in the kettle under the feedback of the molten kettle oxygen sensor; the molten kettle air blast pipe is used for increasing the air pressure value in the kettle by introducing high-purity Ar into the molten kettle; the molten kettle cover bottom plate and the molten kettle cover top plate are connected by the molten kettle support rod, and an installation space is formed between the molten kettle cover bottom plate and the molten kettle cover top plate.

4. The tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment according to claim 1 is characterized in that: The test kettle includes a test kettle body and a test kettle cover that cooperate with each other, wherein the test kettle body structure includes a test kettle base, a test kettle thermal insulation cotton, a test kettle bottom heater, a test kettle stainless steel outer wall and a test kettle inner tank, the test kettle base is connected and fixed to the frame, the test kettle inner tank is connected and fixed to the test kettle base, a test kettle bottom heater is arranged at the bottom of the test kettle inner tank, the test kettle thermal insulation cotton wraps the test kettle inner tank and the test kettle bottom heater, and the test kettle stainless steel outer wall is used to wrap the entire test kettle body.

5. The tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment according to claim 4 is characterized in that: The test kettle cover includes a test kettle cover bottom plate, a test kettle cover top plate, a test kettle support rod, a test kettle hanging ring, a test kettle pressure sensor, a test kettle thermocouple sensor, a test kettle oxygen sensor, a test kettle liquid level sensor, a test kettle air inlet pipe, and a test kettle exhaust pipe, wherein the test kettle pressure sensor, the test kettle thermocouple sensor, the test kettle oxygen sensor, and the test kettle liquid level sensor are arranged on the kettle cover bottom plate, and the test kettle air inlet pipe is used for conveying a mixture of high-purity Ar, Ar / O2 and Ar / H2 with adjustable flow ratio into the test kettle, so as to ensure the dissolved oxygen concentration in the kettle under the feedback of the test kettle oxygen sensor.

6. The tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment according to claim 1, characterized in that: The normal force loading module is installed on the lid of the test kettle, wherein the normal force loading module includes a normal force loading unit, a normal force sensor, a normal force adapter, a normal force connecting block, a normal force linear bearing, a normal force water cooling jacket, a normal force transmission shaft and a normal force grinding pair fixture; wherein the normal force loading unit and the normal force sensor are connected by bolts, and the normal force adapter is bolted to assemble it with the normal force connecting block; the left and right normal force transmission shafts are designed as an integrated whole, the normal force grinding pair fixture is installed between the left and right normal force transmission shafts, and the normal force transmission shaft is positioned by a normal force linear bearing to ensure the accuracy of loading; the normal force linear bearing is connected to the normal force water cooling jacket by bolts, and the normal force water cooling jacket is fixed to the bottom plate of the test kettle lid by bolts.

7. The tangential and punching composite fretting abrasion experimental device in a high-temperature liquid metal environment according to claim 1 is characterized in that: The micro-motion module includes a voice coil motor base, a voice coil motor, a connecting plate, a connecting shaft, a heat shield, a linear bearing, a water cooling jacket, a sleeve, a transmission shaft, a guide rail, a cover plate, a slider, a micro-motion rod, and a sample fixture; The voice coil motor is fixed to the voice coil motor base by screws, and the voice coil motor base is fixed to the frame; the connecting plate is fixed to the voice coil motor by bolts, the connecting plate is connected to one end of the connecting shaft, and the other end of the connecting shaft, the heat insulation plate and the adapter block are matched by bolts; the linear bearing is fixed to one end of the water cooling jacket by bolts, the inside of the water cooling jacket is a sleeve, the sleeve is welded to the inner wall of the test kettle, threaded holes are punched at both ends of the transmission shaft, one end is connected to the adapter block, and the other end is connected to the slider, the guide rail is fixed to the cover plate by screws, and the cover plate is fixed to the bottom plate of the test kettle cover by bolts; the slider is provided with a threaded hole for fixing the micro-motion rod, and the sample fixture and the micro-motion rod are bolted.

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