Device and method for testing high-temperature abrasion performance of graphite fuel element

Abstract

The invention provides a graphite fuel element high-temperature abrasion performance testing device and method.The testing device comprises an abrasion simulation device, a heating device, a quality monitoring device and a data processing and analyzing system.The abrasion simulation device comprises an abrasion cavity, a clamping piece, a servo motor and an opposite abrasion piece, the clamping piece is suitable for clamping a graphite fuel element to be tested, and the clamping piece is suitable for clamping the graphite fuel element to be tested; the clamping piece is connected to the output end of the servo motor, a machine body of the servo motor is connected to the inner wall of the abrasion cavity through a telescopic mechanism, and the abrasion cavity is connected with an air source. The heating device is used for adjusting the temperature of the abrasion chamber; the quality monitoring device is connected to the abrasion cavity, and the data processing and analyzing system is electrically connected with the quality monitoring device. According to the invention, the environment of the graphite fuel element in actual work can be highly simulated, the abrasion performance test can be carried out, the abrasion behavior can be reliably evaluated, and a reliable basis is provided for optimal design and safe use of the graphite fuel element.

Description

Technical Field

[0001] The present invention relates to the technical field of material performance testing, and in particular to a high-temperature abrasion performance testing device and a testing method for a graphite fuel element. Background Art

[0002] With the development of fields such as nuclear energy, graphite, as a key fuel element or structural material, has attracted considerable attention for its performance under harsh operating conditions such as high temperatures and high-velocity fluid erosion. In the nuclear energy sector, graphite is often used as the primary fuel element in high-temperature gas-cooled reactors to meet the higher coolant inlet and outlet temperatures required by these reactor types.

[0003] During the actual operation of a high-temperature gas-cooled reactor (HTGR), graphite fuels will wear out due to coolant flow, continuous loading and unloading, and other behaviors. Moreover, since the coolant of a HTGR is usually helium or carbon dioxide, the above coolant will interact with graphite to a certain extent at high temperatures, causing corrosion of the fuel and abrasion between graphite fuels. This not only affects its structural integrity, but may also change its physical and chemical properties, thereby having a significant impact on the safety and reliability of the entire HTGR system.

[0004] Currently, performance testing devices for graphite materials often focus on the investigation of a single factor, such as only focusing on high-temperature corrosion behavior or mechanical wear at room temperature. There is a lack of simulation test methods under the simultaneous action of high temperature and wear, and there is a lack of real-time monitoring and evaluation of the quality changes of graphite materials during the test process. Summary of the Invention

[0005] The present invention aims to address, at least to a certain extent, one of the technical problems in the related art. To this end, embodiments of the present invention provide a high-temperature abrasion performance testing apparatus and method for graphite fuel elements. These apparatuses can closely simulate the actual operating environment of graphite fuel elements, conduct abrasion performance testing, and achieve reliable evaluation of abrasion behavior.

[0006] According to one embodiment of the present invention, a high-temperature abrasion performance test device for graphite fuel elements is provided, comprising: an abrasion simulation device, a heating device, a quality monitoring device and a data processing and analysis system. The abrasion simulation device comprises an abrasion chamber, a clamping member, a servo motor and a counter-abrasion member. The clamping member and the counter-abrasion member are arranged at relative positions in the abrasion chamber. The clamping member is suitable for clamping the graphite fuel element to be tested. The clamping member is detachably connected to the output end of the servo motor. The body of the servo motor is connected to the inner wall of the abrasion chamber through a telescopic mechanism. The telescopic mechanism drives the clamping member to move toward or away from the counter-abrasion member. The abrasion chamber has an air inlet, which is connected to an air source through an air inlet pipe. The servo motor is connected to a controller. The heating device adjusts the temperature of the abrasion chamber. The quality monitoring device is connected to the abrasion chamber to monitor the quality changes of the graphite fuel element to be tested in real time. The data processing and analysis system is electrically connected to the quality monitoring device.

[0007] In some embodiments, the heating device includes a heating chamber, a heating coil, a thermocouple and an intelligent temperature controller. The abrasion simulation device is arranged inside the heating chamber, the heating coil is arranged on the outer wall of the abrasion chamber, and the thermocouple is connected to the abrasion chamber to monitor the temperature of the abrasion chamber. The intelligent temperature controller is respectively connected to the heating coil and the thermocouple to adjust the heating temperature of the heating coil in real time.

[0008] In some embodiments, the heating coil is uniformly wound around the outer wall of the abrasion chamber in a spiral structure.

[0009] In some embodiments, the heating coil is made of silicon-molybdenum material.

[0010] In some embodiments, the wall thickness of the heating chamber is 8 cm.

[0011] In some embodiments, the abrasion chamber has an exhaust port, which is connected to a gas processing device through an exhaust pipe.

[0012] In some embodiments, the telescopic mechanism is a hydraulic cylinder, which includes a cylinder body and a cylinder rod. The cylinder body is fixedly connected to the inner wall of the abrasion chamber, and the cylinder rod is fixedly connected to the body of the servo motor. The cylinder rod is telescopic in the horizontal direction, and the clamping part and the grinding part are positioned relative to each other in the horizontal direction.

[0013] In some embodiments, the mass monitoring device comprises a microbalance sensor.

[0014] In some embodiments, the air inlet pipe is connected to a flow valve and a flow meter.

[0015] Another embodiment of the present invention provides a method for testing the high-temperature abrasion performance of a graphite fuel element, using the above-mentioned high-temperature abrasion performance testing device of a graphite fuel element, comprising the following steps:

[0016] According to the shape and size of the graphite fuel element to be tested, select a suitable clamping piece and clamp the graphite fuel element to be tested on the clamping piece;

[0017] According to the test requirements, the abrasion chamber is connected to different gas sources, the temperature of the abrasion chamber is adjusted, and the speed of the servo motor in different time periods is set through the controller;

[0018] The servo motor and the telescopic mechanism are started to make the graphite fuel element to be tested close to the abrasive member and generate relative motion, and the abrasion test is carried out. The quality monitoring device monitors the quality change of the graphite fuel element to be tested in real time;

[0019] The data processing and analysis system analyzes the mass change of the graphite fuel element to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0021] in:

[0022] Figure 1 Schematic diagram of the structure of a high-temperature abrasion performance test device for graphite fuel elements in an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the abrasion simulation device;

[0024] Reference numerals:

[0025] 1. Heating chamber; 2. Abrasion chamber; 3. Quality monitoring device; 4. Data processing and analysis system; 5. Servo motor; 6. Telescopic mechanism; 7. Clamping part; 8. Graphite fuel element to be tested; 9. Abrasive part; 10. Gas source; 11. Gas processing device; 12. Gas recovery device. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] The following describes a high-temperature abrasion performance test device and a test method for graphite fuel elements according to an embodiment of the present invention with reference to the accompanying drawings.

[0028] like Figure 1-2As shown, an embodiment of the present invention provides a high-temperature abrasion performance test device for graphite fuel elements, comprising: an abrasion simulation device, a heating device, a quality monitoring device 3 and a data processing and analysis system 4. The abrasion simulation device comprises an abrasion chamber 2, a clamping member 7, a servo motor 5 and a counter-abrasive member 9. The clamping member 7 and the counter-abrasive member 9 are arranged at opposite positions in the abrasion chamber 2. The clamping member 7 is suitable for clamping the graphite fuel element 8 to be tested. The clamping member 7 is detachably connected to the output end of the servo motor 5. The body of the servo motor 5 is connected to the inner wall of the abrasion chamber 2 through a telescopic mechanism 6. The telescopic mechanism 6 drives the clamping member 7 to move toward or away from the counter-abrasive member 9. The abrasion chamber 2 has an air inlet, which is connected to an air source 10 through an air inlet pipe. The servo motor 5 is connected to a controller; the heating device adjusts the temperature of the abrasion chamber 2; the quality monitoring device 3 is connected to the abrasion chamber 2 to monitor the quality changes of the graphite fuel element 8 to be tested in real time; and the data processing and analysis system 4 is electrically connected to the quality monitoring device 3.

[0029] By synergistically controlling multiple factors, including temperature, external gas source 10, and mechanical abrasion, the present invention achieves a highly accurate representation of the complex service life of graphite fuel elements in actual nuclear reactor applications, involving friction and wear between them and other components or similar fuels. This allows the test results to more closely reflect the evolution of material properties under actual operating conditions, providing an accurate reference for engineering design. Furthermore, the present invention can promptly reflect the dynamics of material abrasion, significantly improving the timeliness and accuracy of monitoring compared to traditional offline weighing methods, facilitating in-depth research into abrasion mechanisms. This provides a reliable basis for the optimized design and safe use of graphite fuel elements.

[0030] The test device of the embodiment of the present invention adopts a modular design concept. The functional modules are highly compatible and easy to assemble and disassemble, which greatly simplifies the device construction before the test and the cleaning and maintenance process after the test. The automated control system runs through the entire test process. From sample loading, environmental parameter setting to abrasion process startup and data acquisition and analysis, all can be automatically operated with one click according to the preset program, effectively reducing the time loss and error risk caused by manual operation. In addition, thanks to the instant feedback mechanism of the online quality evaluation system, test personnel can quickly optimize subsequent test plans based on the current results, avoid invalid test repetitions, and significantly increase the density of obtaining effective data per unit time, greatly shortening the overall test cycle compared to traditional methods.

[0031] Furthermore, the gas source 10 includes a variety of gases that simulate the common atmosphere in a nuclear reactor, such as helium, carbon dioxide, etc. The purity of the gas is maintained at above 99.999%, or adjusted according to demand. The carrier of the gas source 10 is a high-pressure gas cylinder.

[0032] Furthermore, the data processing and analysis system 4 not only collects real-time signals of mass change but also records key test parameters, providing timely feedback and adjustments to the test status. The acquired mass data can be used through an integrated program to plot high-quality mass change curves in real time, accurately calculate wear rates, and intelligently identify abnormal data.

[0033] Furthermore, the heating device uses advanced high-frequency induction heating equipment, which can quickly heat the abrasion chamber 2 to the target temperature in a short time. The power of the high-frequency induction heating equipment is 10 kilowatts.

[0034] Furthermore, the clamping member 7 is an electric clamping member or a pneumatic clamping member, which can adjust the loading force value and the opening range of the clamping arm, and can clamp and fix graphite fuel elements of different shapes and sizes. It can accurately control the force and multi-directional degrees of freedom between the graphite fuel element 8 to be tested and the wear member 9, simulate complex force conditions, and reproduce different wear processes.

[0035] Furthermore, the connection between the clamping member 7 and the output end of the servo motor 5 is a conventional detachable connection such as a threaded connection.

[0036] Furthermore, the abrasion simulation device is equipped with a displacement sensor that can monitor the relative displacement between the graphite fuel element 8 to be tested and the counter-abrasive part 9 in real time. Combined with the controller, it can accurately control the abrasion stroke and rate to achieve different modes of abrasion simulation to simulate the mutual friction movement state between the fuel and other components or between two fuels in actual operation.

[0037] Furthermore, the abrasive member 9 is detachably fixedly connected to the inner wall of the abrasion chamber 2, enabling replacement of the abrasive member 9. It should be noted that there are no specific requirements for the material or shape of the abrasive member 9; it can be spherical or plate-shaped. However, it must have sufficient hardness, such as 200 HV at room temperature and no less than 150 HV at high temperatures. This ensures that when the graphite fuel element 8 to be tested rubs against the abrasive member 9, the abrasive member 9 does not wear, thereby ensuring that the test process and test data are not affected.

[0038] Furthermore, the abrasion chamber 2 is provided with a viewing window to facilitate observation of the test process.

[0039] In some embodiments, the heating device includes a heating chamber 1, a heating coil, a thermocouple and an intelligent temperature controller. The abrasion simulation device is arranged inside the heating chamber 1, the heating coil is arranged on the outer wall of the abrasion chamber 2, and the thermocouple is connected to the abrasion chamber 2 to monitor the temperature of the abrasion chamber 2. The intelligent temperature controller is connected to the heating coil and the thermocouple respectively to adjust the heating temperature of the heating coil in real time.

[0040] Furthermore, the heating chamber 1 is a closed space and is made of materials that are resistant to high temperatures, are resistant to oxidation, and have excellent heat insulation properties, thereby reducing heat loss to the outside.

[0041] Furthermore, the thermocouple is a high-precision thermocouple with a response time of less than 0.5 seconds, capable of transmitting temperature signals in real time to the intelligent temperature controller. The thermocouple is located near the graphite fuel element 8 under test. The thermocouple is calibrated using a standard temperature source to ensure that its measurement error is within the allowable range. During the test, the thermocouple collects temperature signals in real time and transmits them to the intelligent temperature controller, which processes the temperature data at 0.1-second intervals.

[0042] Furthermore, the intelligent temperature controller uses an optimized PID control algorithm to dynamically adjust the heating power to ensure minimal temperature fluctuations throughout the test process.

[0043] In some embodiments, the heating coil is uniformly wound around the outer wall of the abrasion chamber 2 in a spiral structure.

[0044] By evenly arranging the heating coils, the heating area ensures that it covers the area where the graphite fuel element 8 to be tested is placed, and the magnetic field is evenly distributed, achieving rapid heating and temperature uniformity within ±1% across the heating area. The maximum stable heating temperature can reach 1200°C, precisely meeting the temperature requirements of the graphite fuel element under high-temperature and complex operating conditions. For example, in one test, when the target temperature was set at 1000°C, the heating device achieved a sample area temperature between 995°C and 1005°C within 1-1.5 hours of startup, meeting the requirements for both heating rate and temperature uniformity.

[0045] In some embodiments, the heating coil is made of silicon-molybdenum material.

[0046] In some embodiments, the wall thickness of the heating chamber 1 is 8 cm. According to tests, a wall thickness of 8 cm can effectively reduce heat loss at a high temperature of 1200° C. and ensure a stable temperature inside the heating chamber 1 .

[0047] In some embodiments, the abrasion chamber 2 has an exhaust port connected to the gas treatment device 11 through an exhaust pipe. The gas purified by the gas treatment device 11 is discharged into the atmosphere to minimize the pollution of the gas to the external environment.

[0048] Furthermore, the gas processing device 11 is connected to the gas recovery device 12 , and the gas recovery device 12 is connected to the abrasion chamber 2 through a pipeline, so that the purified gas can be introduced into the abrasion chamber 2 again for recycling.

[0049] In some embodiments, the telescopic mechanism 6 is a hydraulic cylinder, which includes a cylinder body and a cylinder rod. The cylinder body is fixedly connected to the inner wall of the abrasion chamber 2, and the cylinder rod is fixedly connected to the body of the servo motor 5. The cylinder rod is telescopic in the horizontal direction, and the clamping member 7 and the grinding member 9 are positioned relative to each other in the horizontal direction.

[0050] In some embodiments, the quality monitoring device 3 comprises a microbalance sensor.

[0051] Furthermore, a quality monitoring device 3 is located at the bottom of the abrasion chamber 2, below the grinding area of ​​the graphite fuel element 8 to be tested and the grinding wheel 9. This device is used to weigh the debris dropped from the abrasion of the graphite fuel element 8 to be tested in real time, and to calculate the real-time mass of the graphite fuel element 8 to be tested through internal calculations. The quality monitoring device 3 measures subtle changes in the mass of the graphite fuel element 8 to be tested during the measurement period set by the test. The mass data is transmitted in real time to the data acquisition card of the data processing and analysis system 4 via a microbalance sensor, ensuring the ultra-high accuracy and timeliness of the quality data. It should be noted that this method is only one form of the quality monitoring device 3; other forms that can achieve real-time measurement functions are also possible.

[0052] Furthermore, the microbalance sensor is mounted on a stable support structure.

[0053] Furthermore, the microbalance sensor has an accuracy of 0.01 mg and is calibrated with a standard mass block before use to ensure that the mass measurement error is within ±1%.

[0054] In some embodiments, the inlet pipe is connected to a flow valve and a flow meter. This allows precise control of the inlet flow rate, ensuring a stable atmosphere that meets preset requirements during the test. The flow valve and flow meter work together to stably control the gas flow rate based on test requirements. For example, in a test simulating the atmosphere inside a nuclear reactor, the helium flow rate was set at 2 mL / min. The flow meter monitored flow fluctuations in real time, keeping the fluctuation range within ±1% of the set value.

[0055] Another embodiment of the present invention provides a method for testing the high-temperature abrasion performance of a graphite fuel element, using the above-mentioned high-temperature abrasion performance testing device of a graphite fuel element, comprising the following steps:

[0056] S1. Select a suitable clamping member 7 according to the shape and size of the graphite fuel element 8 to be tested, and clamp the graphite fuel element 8 to be tested on the clamping member 7;

[0057] S2. According to the test requirements, the air inlet pipe of the abrasion chamber 2 is connected to different air sources 10, the temperature of the abrasion chamber 2 is adjusted, and the speed of the servo motor 5 is set in different time periods through the controller;

[0058] S3. Start the servo motor 5 and the telescopic mechanism 6 to make the graphite fuel element 8 to be tested close to the abrasive member 9 and generate relative motion to perform the abrasion test. The quality monitoring device 3 monitors the quality change of the graphite fuel element 8 to be tested in real time.

[0059] S4. The data processing and analysis system 4 analyzes the mass change of the graphite fuel element 8 to be tested.

[0060] Furthermore, the graphite fuel element 8 to be tested is cleaned and dried before the test, and then its three-dimensional dimensions are measured using a dimension measuring tool, and the relevant information is recorded in the data processing and analysis system 4 .

[0061] Furthermore, according to the actual service scenario of the graphite fuel element 8 to be tested, key parameters such as test temperature, gas flow, loading force value, loading frequency (or motor speed), total test duration, quality monitoring time point, quality deviation alarm value, etc. are set, and the system automatically generates a test plan and starts the device preheating program.

[0062] Furthermore, by adjusting the load force knob or motor drive, the load force deviation is set to ±1%, ensuring that the fixed deviation of the graphite fuel element 8 in the height and horizontal directions does not exceed ±0.5%. When simulating different wear processes, the controller of the servo motor 5 is used to precisely control the relative motion between the graphite fuel element 8 and the counter-wearing member 9 according to preset displacement and velocity curves. For example, when simulating slight friction between graphite fuel elements, the load force is set to 5N and the load frequency is controlled at 2Hz.

[0063] Furthermore, in step S4, the data acquisition card in data processing and analysis system 4 possesses high-speed data acquisition capabilities, capable of simultaneously receiving multiple signals, including temperature, gas flow, and mass changes, and storing the data on a local hard drive at a frequency of 200 MHz. During the experiment, the real-time recorded temperature fluctuation data was accurate to ±2%, and the dynamic gas flow data was recorded at an interval of 10 seconds.

[0064] The data processing and analysis system 4 processes the collected data using pre-programmed data analysis software. It calculates the wear rate for each time period based on the mass change and time interval, and plots high-quality mass change curves and wear rate-time curves. The intelligent identification of abnormal data is achieved by setting thresholds for abnormal data, such as mass mutation thresholds and abnormal temperature fluctuation thresholds. Data exceeding these thresholds is flagged and an alarm is issued, allowing test personnel to promptly review and address them.

[0065] Feasibility analysis:

[0066] The test device of the embodiment of the present invention is built on a deep theoretical foundation of multidisciplinary integration, covering disciplines such as materials science, mechanical engineering and detection technology. The high-temperature heating technology on which the device relies draws on the mature temperature control technology of existing advanced industrial furnaces, and adopts a high-precision PID temperature control algorithm combined with high-quality heating elements. Its stability and accuracy have been widely verified in similar high-temperature test scenarios; the abrasion simulation mechanism is adapted to the special requirements of graphite fuel elements, and the processing accuracy and assembly process of its key components can be achieved by professional mechanical processing companies using existing high-precision CNC equipment; the high-temperature resistant alloy materials, thermal insulation materials, etc. of the main structure of the device are all common industrial materials in the market, with stable supply channels and controllable costs. Its mechanical properties, thermal physical properties and other indicators have been strictly tested and meet the design requirements. In summary, the solution of the embodiment of the present invention is fully advanced and practical.

[0067] The present invention is further described below through specific examples.

[0068] Example 1

[0069] A method for testing the high-temperature abrasion performance of a graphite fuel element comprises the following steps:

[0070] First, the graphite fuel element 8 to be tested was cleaned using anhydrous ethanol and an ultrasonic cleaner, and then dried in an oven at 105°C for 2 hours. The three-dimensional dimensions of the graphite fuel element 8 to be tested were measured using a measuring tool with an accuracy of 0.02 mm, and the data was entered into the data processing and analysis system 4.

[0071] The graphite fuel element 8 to be tested was mounted on the sample holder 7. The following parameters were set according to the test requirements: test temperature of 1000°C, gas flow rate of 2 mL / min, loading force of 5 N, loading frequency of 2 Hz, total test duration of 24 hours, quality monitoring every 30 minutes, and a quality deviation alarm of ±20% of the original mass. The system automatically generated the test plan and initiated the device preheating procedure. During the preheating process, the temperature of the abrasion chamber 2 was monitored in real time. Once the temperature stabilized within the range of 1000°C ±10°C and all systems passed self-tests and were operating normally, the test was initiated, with simultaneous real-time recording of temperature fluctuations, gas flow dynamics, and other data.

[0072] At each quality monitoring time point, the abrasion simulator automatically pauses the wear process for 5 minutes to conduct online monitoring and data collection, and then resumes the test after data collection is complete. When the scheduled total test duration of 24 hours or the quality deviation alarm value is reached, the abrasion simulator automatically stops operation, and each device is safely shut down in sequence. Finally, the raw data collected in real time during the test is analyzed by the data processing and analysis system 4, accurately calculating key parameters such as the average abrasion rate and mass change. Charts such as mass loss-time curves and abrasion rate-time curves under different operating conditions are plotted, and a comprehensive and detailed test report is generated. This provides solid data support for the performance optimization of graphite fuel elements and the reliability assessment of engineering applications.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0075] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0076] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0077] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A graphite fuel element high temperature abrasion performance test device, characterized in that: include: An abrasion simulation device, comprising an abrasion chamber, a clamping member, a servo motor, and a counter-abrasive member, wherein the clamping member and the counter-abrasive member are disposed at opposing positions within the abrasion chamber, the clamping member being adapted to clamp a graphite fuel element to be tested, the clamping member being detachably connected to an output end of the servo motor, the body of the servo motor being connected to an inner wall of the abrasion chamber via a telescopic mechanism, the telescopic mechanism being adapted to move the clamping member toward or away from the counter-abrasive member, the abrasion chamber having an air inlet connected to an air source via an air inlet pipe, and the servo motor being connected to a controller; a heating device, wherein the heating device adjusts the temperature of the abrasion chamber; A quality monitoring device, connected to the abrasion chamber, for real-time monitoring of changes in the quality of the graphite fuel element to be tested; A data processing and analysis system is electrically connected to the quality monitoring device.

2. The graphite fuel element high temperature abrasion performance test device according to claim 1, characterized in that: The heating device includes a heating chamber, a heating coil, a thermocouple and an intelligent temperature controller. The abrasion simulation device is arranged inside the heating chamber, the heating coil is arranged on the outer wall of the abrasion chamber, the thermocouple is connected to the abrasion chamber to monitor the temperature of the abrasion chamber, and the intelligent temperature controller is respectively connected to the heating coil and the thermocouple to adjust the heating temperature of the heating coil in real time.

3. The graphite fuel element high temperature abrasion performance test device according to claim 2, characterized in that: The heating coil is evenly wound around the outer wall of the abrasion chamber in a spiral structure.

4. The graphite fuel element high temperature abrasion performance test device according to claim 2, characterized in that: The material of the heating coil is silicon-molybdenum material.

5. The graphite fuel element high temperature abrasion performance test device according to claim 2, characterized in that: The wall thickness of the heating chamber is 8 cm.

6. The graphite fuel element high temperature abrasion performance test device according to claim 1, characterized in that: The abrasion chamber has an exhaust port, and the exhaust port is connected to a gas processing device through an exhaust pipe.

7. The graphite fuel element high temperature abrasion performance test device according to claim 1, characterized in that: The telescopic mechanism is a hydraulic cylinder, which includes a cylinder body and a cylinder rod. The cylinder body is fixedly connected to the inner wall of the abrasion chamber, and the cylinder rod is fixedly connected to the body of the servo motor. The cylinder rod is telescopic in the horizontal direction, and the clamping member and the counter-wearing member are positioned opposite to each other in the horizontal direction.

8. The graphite fuel element high temperature abrasion performance test device according to claim 1, characterized in that: The quality monitoring device includes a microbalance sensor.

9. The graphite fuel element high temperature abrasion performance test device according to claim 1, characterized in that: The air inlet pipe is connected with a flow valve and a flow meter.

10. A method for testing the high-temperature abrasion performance of graphite fuel elements, characterized in that: The high-temperature abrasion performance test device for graphite fuel elements according to any one of claims 1 to 9 comprises the following steps: According to the shape and size of the graphite fuel element to be tested, select a suitable clamping piece and clamp the graphite fuel element to be tested on the clamping piece; According to the test requirements, the abrasion chamber is connected to different gas sources, the temperature of the abrasion chamber is adjusted, and the speed of the servo motor in different time periods is set by the controller; The servo motor and the telescopic mechanism are started to make the graphite fuel element to be tested close to the abrasive member and generate relative motion, and the abrasion test is performed. The quality monitoring device monitors the quality change of the graphite fuel element to be tested in real time; The data processing and analysis system analyzes the mass change of the graphite fuel element to be tested.

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