Method and device for simulating wire winding fretting wear test of high-temperature gas cooled reactor

Abstract

The invention relates to the technical field of fretting abrasion tests, and discloses a method and device for simulating a high-temperature gas cooled reactor winding wire fretting abrasion test, the device comprises a sealing device and a heating device arranged in the sealing device, a first bent rod used for installing a steel wire clamp is arranged on the first side face of the sealing device, and a second bent rod used for installing a steel wire clamp is arranged on the second side face of the sealing device; a first bent rod used for installing a pipe clamp is arranged on the first side face of the sealing device and extends into the sealing device, a second bent rod used for installing the pipe clamp is arranged on the second side face of the sealing device and extends into the sealing device, and the steel wire clamp and the pipe clamp are both located in the heating device; the end, located outside the first side face of the sealing device, of the first bent rod is connected to the first driving device, and the end, located outside the second side face of the sealing device, of the second bent rod is connected to the second driving device. A circle of annular threaded holes are formed in the steel wire clamp, and the winding condition of the steel wire between 0 degree and 90 degrees is simulated through matching of different rotating positions between the steel wire clamp and the annular threaded holes.

Description

Technical Field

[0001] The invention relates to the technical field of fretting wear test, and more particularly to a method and a device for simulating fretting wear test of high-temperature gas-cooled pile winding wire. Background Art

[0002] In the field of nuclear energy engineering applications, especially in the research and safety assessment of high-temperature gas-cooled reactors, the study of wire winding fretting is of vital importance. However, there are many deficiencies in the simulation of wire winding fretting tests in high-temperature gas-cooled reactors. Traditional test methods often cannot accurately simulate the complex actual working conditions inside high-temperature gas-cooled reactors, resulting in the inability to obtain accurate data when studying the fretting erosion problem between the wire winding and the fuel rods.

[0003] During the operation of a high-temperature gas-cooled reactor, the micro-motion abrasion between the winding wire and the fuel rod is complex and has a significant impact on the reactor performance and safety. Currently, there is much room for improvement in the simulation test of micro-motion abrasion of high-temperature gas-cooled reactor winding wire.

[0004] In actual high-temperature gas-cooled reactors, the gas cooling process is an important link in maintaining the normal operation of the core. The flow and composition of the gas have an important influence on the micro-motion wear of the wire windings and fuel rods. However, traditional test equipment often cannot accurately simulate the gas flushing and exhaust process in the gas cooling process, resulting in the gas dynamics in the test environment being far different from the actual high-temperature gas-cooled reactor. In addition, the regulation of the oxygen atmosphere is crucial for studying micro-motion wear, because different oxygen contents will significantly change the oxidation characteristics of the wire windings and fuel rod surfaces, thereby affecting the rate and pattern of micro-motion wear. However, the existing test equipment is not accurate enough in simulating the oxygen atmosphere, and it is difficult to reproduce the actual situation of the high-temperature gas-cooled reactor under different oxygen concentration conditions, which makes the research on micro-motion wear of the wire windings lack accuracy and comprehensiveness.

[0005] At the same time, the simulation of the contact state between the steel wire and the fuel rod is also a key issue. In the actual operation of the high-temperature gas-cooled reactor, the contact between the steel wire and the fuel rod is at different angles, and most of the existing test devices use simple fixed fixtures, which cannot truly simulate this dynamic contact between the wire and the fuel rod. This single simulation method makes the test results unable to accurately reflect the actual contact between the tube and the wire in actual operation. Summary of the invention

[0006] In view of this, the present invention provides a method and a device for simulating the micro-motion wear test of high-temperature gas-cooled reactor windings, which can realize the impact-tangential coupled micro-motion wear between the high-temperature gas-cooled reactor windings and the tubes at different angles, and realize the environmental atmosphere requirements inside the high-temperature gas-cooled reactor, so as to solve the problem that in the existing simulation test scenarios, there is a lack of an advanced and effective test device and test method for the study of micro-motion wear of high-temperature gas-cooled reactor windings.

[0007] To achieve the above-mentioned purpose, the present invention provides a device for simulating the fretting wear test of high-temperature gas-cooled pile winding wire, comprising a sealing device and a heating device arranged inside the sealing device, wherein a first curved rod for installing a wire clamp is arranged on a first side surface of the sealing device, the first curved rod extends into the sealing device, and after passing through the heating device, extends from a third side surface of the sealing device opposite to the first side surface, a second curved rod for installing a pipe clamp is arranged on a second side surface of the sealing device, the second curved rod extends into the sealing device, and after passing through the heating device, extends from a fourth side surface of the sealing device opposite to the second side surface, the wire clamp and the pipe clamp are both located inside the heating device; One end of the first curved rod located outside the first side of the sealing device is connected to the first driving device, a first pressure sensor is provided between the first driving device and the first curved rod, one end of the second curved rod located outside the second side of the sealing device is connected to the second driving device, a second pressure sensor is provided between the second driving device and the second curved rod, and the first driving device and the second driving device are both electrically connected to the host computer; The sealing device is provided with a barometer, an air intake pipeline, a vacuum pipeline, an ionization gauge, and an oxygen sensor, and the heating device is provided with a temperature sensor inside; The wire clamp is provided with a circle of annular threaded holes, and the winding condition of the wire between 0° and 90° is simulated by the cooperation between the wire clamp and the annular threaded holes at different rotational positions.

[0008] Preferably, a damping punch is provided between the first driving device and the first pressure sensor.

[0009] Preferably, a first dynamic sealing bellows for the first bent rod to pass through is provided on the first side surface of the sealing device, and a second dynamic sealing bellows for the second bent rod to pass through is provided on the second side surface of the sealing device.

[0010] Preferably, the sealing device comprises a sealing box and a sealing box door covered at the top of the sealing box, and a hand wheel screw device is used to lock the sealing box and the sealing box door.

[0011] Preferably, the hand wheel screw device comprises a track fixing plate mounted on the sealed box, a support plate mounted on the track fixing plate, a sliding rod fixing plate mounted on the sealed box door and a screw shaft, and a straight track base is provided on both sides of the top of the sealed box; The fixed plate is slidably connected to the linear track base through a linear guide rail, the support plate is installed on the top of the track fixed plate through a support rod, the fixed plate is installed on the top of the sealed box door through a sliding rod, and the fixed plate is located between the support plate and the fixed plate.

[0012] Preferably, the lower end of the sliding rod passes through the fixed plate and is threadedly connected to the sealed box door, and the upper end is fixedly connected to the screw base through the sliding rod fixing plate, and the sliding rod is slidably connected to the fixed plate, and the lower end of the screw shaft passes through the support plate and the sliding rod fixing plate in sequence and is rotatably connected to the track fixing plate, and the screw shaft is threadedly connected to the screw base.

[0013] Preferably, one end of the linear track base extends to the outside of the sealed box, and a track reinforcement rib is provided below the portion of the linear track base extending to the outside of the sealed box.

[0014] Preferably, the heating device comprises a heating box and a heating plate installed on the outer wall of the heating box, and the temperature sensor is installed inside the heating box.

[0015] Preferably, both the first driving device and the second driving device adopt voice coil motors.

[0016] The method for simulating the fretting wear test of high temperature gas-cooled pile winding provided by the present invention comprises the following steps: a. Install the tube sample and the steel wire sample on the tube fixture and the steel wire fixture respectively, select the contact angle between the steel wire sample and the tube sample, and seal the sealing device; b. Use a vacuum pump group to evacuate the inside of the sealing device through the vacuum pipeline, measure the vacuum degree inside the sealing device through the ionization gauge to meet the vacuum degree requirements of the test, and then press the inert gas into the sealing device through the air inlet pipeline, and monitor and control the pressure of the inert gas with a pressure gauge; c. The oxygen sensor detects whether the oxygen concentration in the sealing device meets the standard. If not, repeat step b; d. Perform heating treatment through a heating device to achieve a high-temperature inert gas state, measure the temperature in the sealing device in real time according to the temperature sensor, and perform closed-loop adjustment of the high-temperature inert gas temperature to achieve the test conditions; e. Input the experimental parameters to the upper computer. After completing the input of the experimental parameters, the first driving device is turned on to load the first bending rod, so that the first bending rod performs reciprocating linear motion at a certain frequency, and then the second driving device performs reciprocating micro-motion operation at a certain micro-displacement to achieve impact-tangential coupling micro-motion. After completing the test of the set number of cycles, the first driving device and the second driving device are turned off and the test results are output; f. After the micro-motion abrasion test is completed, the sealing device is cooled down to room temperature, the steel wire and tube samples are taken out, and the test is completed.

[0017] It can be seen from the above technical solutions that, compared with the prior art, the method and device for simulating the micro-motion wear test of high-temperature gas-cooled reactor wire winding of the present invention, when simulating the test environment of high-temperature gas-cooled reactor, continuously evacuates and fills the sealing device with inert gas, accurately controls the oxygen concentration, ensures the key environmental conditions, and simulates the winding of wire winding and fuel rods at three angles of 0°, 45°, and 90° through a rotatable fixture, and comprehensively studies the micro-motion wear behavior of impact-tangential coupling of steel wire and gas-cooled reactor tube under various contact conditions. At the same time, the present invention also has the following beneficial effects: 1. Accurately simulate the environment atmosphere: The present invention is equipped with a complete environment control component. The vacuum pipeline, ionization gauge, air intake pipeline, barometer and oxygen sensor can be used to accurately control the environment in the sealing device. The vacuum pump group is used to evacuate the vacuum pipeline. After the vacuum degree requirement of the test is met, the inert gas is pressed in, and the pressure is monitored and controlled by the barometer. At the same time, the oxygen sensor detects the oxygen concentration. If the concentration does not meet the standard, the operation is repeated until the concentration meets the standard. The gas flushing and exhaust process and oxygen atmosphere in the high-temperature gas-cooled reactor can be accurately reproduced, which effectively avoids the shortcomings of traditional test devices in simulating the gas cooling process and oxygen atmosphere, ensures that the test environment is highly close to the inside of the actual high-temperature gas-cooled reactor, and greatly improves the accuracy and reliability of the test results. 2. Realize high-precision coupled micromotion: The first drive device and the second drive device both use voice coil motors, which have the characteristics of high-frequency response and high precision. Together with the first pressure sensor and the second pressure sensor, they can accurately control and measure the impact force and tangential friction force. The two drive devices drive the first bending rod and the second bending rod respectively to realize vertical impact motion and horizontal tangential motion at room temperature of 800°C, thereby realizing high-precision impact-tangential coupled micromotion. This precise motion control and data measurement method provides an accurate data basis for studying the mechanical behavior in the micromotion abrasion process; 3. Ensure stable operation of the device: A damping punch is arranged between the first driving device and the first pressure sensor, which can not only effectively prevent the rigid impact force from causing damage to the first driving device, but also ensure continuous and stable impact force output, thereby ensuring stable operation of the device during the test; 4. Easy to operate and maintain: The sealing box and the sealing box door of the sealing device are locked with a handwheel screw device. The sealing box door can be easily raised or lowered by rotating the screw shaft. The operation is simple, and one end of the linear track base extends to the outside of the sealing box. Track reinforcement ribs are provided underneath. After opening the sealing box door, it can be moved away along the track, which is convenient for the installation, replacement of internal samples and maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the device for simulating the fretting wear test of high temperature gas-cooled reactor winding wire of the present invention; Figure 2 A plan view of a second side surface of the test device of the present invention; Figure 3 It is a structural diagram of the interior of the sealing device of the present invention; Figure 4 It is a structural diagram of the installation of the clamp and the bent rod of the present invention; Figure 5 It is a structural diagram of the wire clamp and the pipe clamp of the present invention when they are at 0°; Figure 6 This is a structural diagram of the wire clamp and the pipe clamp of the present invention when the angle is 45°; Figure 7 This is a structural diagram of the wire clamp and the pipe clamp of the present invention when the angle is 90 degrees.

[0020] Explanation of the reference numerals: 1-first driving device, 2-frame, 3-vacuum pipeline, 4-track reinforcement rib, 5-second driving device, 6-second pressure sensor, 7-second bending rod, 8-linear guide rail, 9-ionization gauge, 10-first bending rod, 11-oxygen sensor, 12-intake pipeline, 13-sealing device, 14-observation window, 15-bending rod guide support, 16-barometer, 17-damping punch, 18-first pressure sensor, 19-sealed box door, 20-track fixing plate, 21-sliding rod fixing plate, 22-screw shaft, 23-screw base, 24-sliding rod, 25-support plate, 26-support rod, 27-linear track base, 28-second dynamic sealing bellows, 29-temperature sensor, 30-first dynamic sealing bellows, 31-wire clamp, 32-pipe clamp, 33-heating box, 34-heating plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of an exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Please refer to the attached Figure 1-7 , which is a device for simulating the micro-motion wear test of high-temperature gas-cooled pile winding wire disclosed in the present invention.

[0023] The device for simulating the micro-motion wear test of high-temperature gas-cooled pile winding provided by the present invention is installed on a frame 2 or other horizontal working surface, and specifically includes a sealing device 13, a heating device, a first driving device 1, and a second driving device 5. The heating device is arranged inside the sealing device 13, and the first driving device 1 and the second driving device 5 are respectively installed on two adjacent side surfaces of the sealing device 13, and the first driving device 1 and the second driving device 5 are both electrically connected to the host computer.

[0024] In this embodiment, the sealing device 13 is divided into a first side surface, a second side surface, a third side surface and a fourth side surface in a counterclockwise direction on a horizontal plane. The first side surface is opposite to the third side surface, and the second side surface is opposite to the fourth side surface.

[0025] The first driving device 1 is located on the first side of the sealing device 13, and the second driving device 5 is located on the second side of the sealing device 13. The first driving device 1 is connected with a first pressure sensor 18 and a first curved rod 10 for installing a wire clamp 31 in sequence. The first curved rod 10 extends into the sealing device 13 from the first side and extends out from the third side after passing through the heating device. The second driving device 5 is connected with a second pressure sensor 6 and a second curved rod 7 for installing a pipe clamp 32 in sequence. The second curved rod 7 extends into the second side of the sealing device 13 and extends out from the fourth side after passing through the heating device. The wire clamp 31 on the first curved rod 10 and the pipe clamp 32 on the second curved rod 7 are both located inside the heating device.

[0026] The sealing device 13 is provided with a barometer 16, an air intake pipeline 12, a vacuum pipeline 3, an ionization gauge 9, and an oxygen sensor 11, and the heating device is provided with a temperature sensor 29 inside.

[0027] As a preferred embodiment, a circle of annular threaded holes is provided on the wire clamp 31. Through the cooperation between the wire clamp 31 and the annular threaded holes at different rotational positions, different angles of 0°-90° can be achieved between the wire sample and the tube sample to simulate the winding of the wire between 0°-90°, such as the more special three angles of 0°, 45°, and 90°.

[0028] Specifically, in actual use, the vacuum pipeline 3 evacuates the sealing device 13 and then introduces inert gas, and the oxygen sensor 11 detects the oxygen concentration in the sealing device 13. If the specified oxygen concentration is not reached, the above process is repeated until the oxygen concentration reaches the standard. The two driving devices drive the two bending rods extending into the heating device to perform vertical impact movement and horizontal tangential movement at room temperature of 800°C, and a rotatable wire clamp is installed on the first bending rod 10 in the impact direction to achieve arbitrary transformation of the three angles of 0°, 45°, and 90°, and realize the coupling micro-motion at different angles between the gas-cooled stack tube and the steel wire at high temperature.

[0029] It should be noted that a host computer or other motor control system can be used to control the loading frequency, loading amplitude and loading curve type of the first drive device 1 and the second drive device 5. The first pressure sensor 18 and the second pressure sensor 6 respectively measure the impact force and tangential friction force, and the analog data collected by the first pressure sensor 18 and the second pressure sensor 6 are collected into the host computer or other acquisition system.

[0030] As a preferred embodiment, a damping punch 17 is further provided between the first driving device 1 and the first pressure sensor 18. The damping punch 17 is composed of components such as a spring and a sleeve, and its function is to prevent the first driving device 1 from being damaged by a rigid impact force, and also to achieve a continuous impact force.

[0031] In actual production, the first pressure sensor 18 and the first curved rod 10 are connected by threads, and the second pressure sensor 6 and the second curved rod 7 are connected by threads, so that installation and disassembly are convenient. As a preferred embodiment, the first curved rod 10 and the second curved rod 7 are U-shaped curved rods.

[0032] In order to more conveniently install the wire clamp 31 on the first curved rod 10 , an internal thread is provided on the first curved rod 10 , so that it is extremely convenient to install and disassemble the sample clamp.

[0033] In order to more conveniently install the tube clamp 32 on the second curved rod 7, an internal thread is provided on the second curved rod 7, so that it is extremely convenient to install and disassemble the sample clamp.

[0034] In order to reduce the deformation of the second bent rod 7 during the tangential movement, the second bent rod 7 is made of high-strength steel, which greatly reduces the deformation during the tangential movement and further improves the stability and reliability of the operation.

[0035] When in use, the present invention realizes punching-cutting coupling movement by respectively driving two bent rods extending into the sealing device 13 through the first driving device 1 and the second driving device 5 to perform vertical impact movement and horizontal tangential movement.

[0036] As a preferred embodiment, the first driving device 1 and the second driving device 5 both use voice coil motors, which have the characteristics of high frequency response and high precision, and can better realize punching-cutting coupling motion. The first pressure sensor 18 and the second pressure sensor 6 use PCB pressure sensors, which have high acquisition frequency and precision, and can further improve the accuracy of the data of the present invention.

[0037] As a preferred embodiment, a first dynamic sealing bellows 30 is provided on the first side of the sealing device 13 for the first curved rod 10 to pass through, and a second dynamic sealing bellows 28 is provided on the second side of the sealing device 13 for the second curved rod 7 to pass through. The first curved rod 10 and the second curved rod 7 extend into the sealing device 13 through the corresponding dynamic sealing bellows, which can not only make a slight reciprocating linear motion in the dynamic sealing bellows, but also ensure the sealing of the connection, thereby ensuring that the pre-set environment in the sealing device 13 is not changed.

[0038] As a preferred embodiment, the sealing device 13 includes a sealing box, and a barometer 16, an air intake line 12, a vacuum line 3, an ionization gauge 9, and an oxygen sensor 11 installed on the sealing box. The heating device includes a heating box 33, a heating plate 34, and a temperature sensor 29 installed in the cavity of the heating box 33. By setting the above devices, experimental requirements under different working conditions can be achieved, such as high temperature, vacuum, and different gas environments.

[0039] As a preferred embodiment, the sealed box has an opening at the top, a sealed box door 19 is provided at the opening, and a rubber ring is also provided at the opening, which is used to improve the sealing effect between the sealed box door 19 and the sealed box. The sealed box door 19 is also provided with an observation window 14, which is made of high-pressure glass. To meet the vacuum environment, the sealed box is made of high-strength steel, and its wall thickness is as large as possible. If necessary, reinforcing ribs can be welded on its outer surface.

[0040] As a preferred embodiment, the locking method between the sealed box and the sealed box door 19 adopts a handwheel screw device, and the handwheel screw device includes a track fixing plate 20 installed on the sealed box, a support plate 25 installed on the track fixing plate 20, a sliding rod fixing plate 21 installed on the sealed box door 19, and a screw shaft 22, and a straight track base 27 is provided on both sides of the top of the sealed box.

[0041] The fixed plate 20 is slidably connected to the linear track base 27 through the linear guide rail 8, the support plate 25 is installed on the top of the track fixed plate 20 through the support rod 26, the fixed plate 21 is installed on the top of the sealed box door 19 through the sliding rod 24, and the fixed plate 21 is located between the support plate 25 and the fixed plate 20.

[0042] The lower end of the sliding rod 24 passes through the fixed plate 20 and is threadedly connected to the sealed box door 19, and the upper end is fixedly connected to the screw base 23 through the sliding rod fixing plate 21, and the sliding rod 24 is slidably connected to the fixing plate 20, and the lower end of the screw shaft 22 passes through the support plate 25 and the sliding rod fixing plate 21 in turn and is rotatably connected to the track fixing plate 20, and the screw shaft 22 is threadedly connected to the screw base 23, and the upper end of the screw shaft 22 can be installed with a hand wheel and other structures, so that the staff can save more effort when rotating the screw shaft 22.

[0043] When in use, the screw base 23 and the fixing plate 21 are raised or lowered by rotating the screw shaft 22, thereby driving the sealing box door 19 to rise or fall, thereby realizing the opening and sealing of the sealing box.

[0044] One end of the linear track base 27 extends to the outside of the sealed box, and a track reinforcement rib 4 is provided below the portion of the linear track base 27 extending to the outside of the sealed box. After the sealed box door 19 is raised using a handwheel screw device, the sealed box door 19 can be moved away from the top of the sealed box along the linear track base 27, and then moved to the top of the sealed box in subsequent use.

[0045] The method for simulating the fretting wear test of high temperature gas-cooled pile winding provided by the present invention comprises the following steps: a. Install the tube sample and the wire sample on the tube fixture 32 and the wire fixture 31 respectively, select the contact angle between the wire sample and the tube sample, and seal the sealing device 13; b. Use a vacuum pump group to evacuate the inside of the sealing device 13 through the vacuum pipeline 3, measure the vacuum degree inside the sealing device 13 through the ionization gauge 9 to meet the vacuum degree requirement of the test, and then press the inert gas into the sealing device 13 through the air inlet pipeline 12, and monitor and control the pressure of the inert gas by the barometer 16; c. The oxygen sensor 11 detects whether the oxygen concentration in the sealing device 13 meets the standard. If not, repeat step b; d. Performing heating treatment by a heating device to achieve a high-temperature inert gas state, measuring the temperature in the sealing device in real time according to the temperature sensor 29, and adjusting the high-temperature inert gas temperature in a closed loop to achieve the test conditions; e. Input the experimental parameters to the upper computer. After completing the input of the experimental parameters, the first driving device 1 is turned on to load the first bending rod 10, so that the first bending rod 10 performs reciprocating linear motion at a certain frequency, and then the second driving device 5 performs reciprocating micro-motion operation with a certain micro-displacement to achieve impact-tangential coupling micro-motion. After completing the test of the set number of cycles, the first driving device 1 and the second driving device 5 are turned off and the test results are output; f. After the fretting abrasion test is completed, the air cooling system is turned on to cool the sealing device 13 to room temperature, and the steel wire and tube samples are taken out, and the test is completed.

[0046] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for simulating the fretting wear test of high temperature gas-cooled pile winding, characterized in that: The invention comprises a sealing device (13) and a heating device arranged inside the sealing device (13); a first curved rod (10) for mounting a wire clamp (31) is arranged on a first side surface of the sealing device (13); the first curved rod (10) extends into the sealing device (13) and, after passing through the heating device, extends out from a third side surface of the sealing device (13) opposite to the first side surface; a second curved rod (7) for mounting a pipe clamp (32) is arranged on a second side surface of the sealing device (13); the second curved rod (7) extends into the sealing device (13) and, after passing through the heating device, extends out from a fourth side surface of the sealing device (13) opposite to the second side surface; the wire clamp (31) and the pipe clamp (32) are both located inside the heating device; One end of the first curved rod (10) located outside the first side surface of the sealing device (13) is connected to the first driving device (1), a first pressure sensor (18) is provided between the first driving device (1) and the first curved rod (10), one end of the second curved rod (7) located outside the second side surface of the sealing device (13) is connected to the second driving device (5), a second pressure sensor (6) is provided between the second driving device (5) and the second curved rod (7), and the first driving device (1) and the second driving device (5) are both electrically connected to a host computer; The sealing device (13) is provided with a pressure gauge (16), an air intake pipeline (12), a vacuum pipeline (3), an ionization gauge (9), and an oxygen sensor (11), and the heating device is provided with a temperature sensor (29); The steel wire clamp (31) is provided with a circle of annular threaded holes, and the steel wire clamp (31) and the annular threaded holes cooperate at different rotational positions to simulate the winding of the steel wire between 0° and 90°.

2. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 1 is characterized in that: A damping plunger (17) is provided between the first drive device (1) and the first pressure sensor (18).

3. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 1, characterized in that: A first dynamic sealing bellows (30) through which the first curved rod (10) passes is provided on the first side surface of the sealing device (13), and a second dynamic sealing bellows (28) through which the second curved rod (7) passes is provided on the second side surface of the sealing device (13).

4. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 1, characterized in that: The sealing device (13) comprises a sealing box and a sealing box door (19) which is covered at the top of the sealing box, and a hand wheel screw device is used to lock the sealing box and the sealing box door (19).

5. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 4 is characterized in that: The hand wheel screw device comprises a track fixing plate (20) mounted on the sealing box, a support plate (25) mounted on the track fixing plate (20), a sliding rod fixing plate (21) mounted on the sealing box door (19), and a screw shaft (22), and a linear track base (27) is provided on both sides of the top of the sealing box; The fixing plate (20) is slidably connected to the linear track base (27) via a linear guide rail (8); the support plate (25) is mounted on the top of the track fixing plate (20) via a support rod (26); the fixing plate (21) is mounted on the top of the sealed box door (19) via a sliding rod (24); and the fixing plate (21) is located between the support plate (25) and the fixing plate (20).

6. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 5, characterized in that: The lower end of the sliding rod (24) passes through the fixing plate (20) and is threadedly connected to the sealed box door (19), and the upper end is fixedly connected to the screw base (23) through the sliding rod fixing plate (21), and the sliding rod (24) is slidably connected to the fixing plate (20), and the lower end of the screw shaft (22) passes through the support plate (25) and the sliding rod fixing plate (21) in sequence and is rotationally connected to the track fixing plate (20), and the screw shaft (22) is threadedly connected to the screw base (23).

7. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 5, characterized in that: One end of the linear track base (27) extends to the outside of the sealed box, and a track reinforcement rib (4) is provided below the portion of the linear track base (27) extending to the outside of the sealed box.

8. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 1, characterized in that: The heating device comprises a heating box (33) and a heating plate (34) installed on the outer peripheral wall of the heating box (33); the temperature sensor (29) is installed inside the heating box (33).

9. The device for simulating the fretting wear test of high temperature gas-cooled pile winding according to claim 1, characterized in that: The first driving device (1) and the second driving device (5) both use voice coil motors.

10. A method for simulating fretting wear test of high temperature gas-cooled pile winding wire, applied to the device for simulating fretting wear test of high temperature gas-cooled pile winding wire as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: a. Install the tube sample and the wire sample on the tube fixture (32) and the wire fixture (31) respectively, select the contact angle between the wire sample and the tube sample, and seal the sealing device (13); b. Using a vacuum pump group to evacuate the inside of the sealing device (13) through the vacuum pipeline (3), measuring the vacuum degree inside the sealing device (13) through the ionization gauge (9) to meet the vacuum degree requirement of the test, and then pressurizing the inert gas into the sealing device (13) through the air inlet pipeline (12), and monitoring and controlling the pressure of the inert gas with the pressure gauge (16); c. The oxygen sensor (11) detects whether the oxygen concentration in the sealing device (13) meets the standard. If not, repeat step b; d. Performing heating treatment by a heating device to achieve a high-temperature inert gas state, measuring the temperature in the sealing device in real time according to the temperature sensor (29), and performing closed-loop adjustment of the high-temperature inert gas temperature to achieve the test conditions; e. Inputting the experimental parameters to the upper computer, after completing the input of the experimental parameters, the first driving device (1) is turned on to load the first bending rod (10), so that the first bending rod (10) performs reciprocating linear motion at a certain frequency, and then the second driving device (5) performs reciprocating micro-motion operation at a certain micro-displacement to achieve impact-tangential coupling micro-motion. After completing the test of the set number of cycles, the first driving device (1) and the second driving device (5) are turned off and the test results are output; f. After the micro-motion abrasion test is completed, the sealing device (13) is cooled down to room temperature, and the steel wire and tube samples are taken out, and the test is completed.

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