A method and device for detecting clearance of electromagnetic bearings of high temperature gas-cooled reactor

Abstract

The present invention proposes a method and device for detecting the gap of a high-temperature gas-cooled reactor electromagnetic bearing. The method controls the rotor of the high-temperature gas-cooled reactor electronic bearing to suspend in an auxiliary bearing ring through an electromagnet, and moves along the axial direction of the auxiliary bearing, measures the gap value between the rotor and the auxiliary bearing, constructs a linear relationship between the electromagnet current and the spacing between the rotor and the auxiliary bearing of the high-temperature gas-cooled reactor electromagnetic bearing, and establishes a mapping table; in the same batch of electromagnets controlling the working process of the high-temperature gas-cooled reactor electronic bearing, the electromagnet current and the spacing between the rotor and the auxiliary bearing of the corresponding high-temperature gas-cooled reactor electromagnetic bearing are collected in real time, and the gap value corresponding to the collected electromagnet current in the mapping table is queried to determine whether the two are the same. Through the present invention, the on-site debugging and maintenance time can be greatly shortened, the debugging and maintenance efficiency and economy can be improved, and the operation reliability of the electromagnetic bearing system can be improved.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power plant monitoring technology, and in particular to a method, device, equipment and storage medium for detecting clearance of electromagnetic bearings of a high-temperature gas-cooled reactor. Background Art

[0002] Electromagnetic bearings are new high-end bearings that rely on electromagnetic force to achieve support. They are significantly different from traditional sliding bearings in terms of working principle. This new type of bearing relies on the magnetic field force generated by the attached electromagnetic coil to suspend and control the shaft, achieving the characteristics of no contact and no need for lubrication. In practical applications, it has the characteristics of low vibration, long life, simple maintenance, low maintenance cost, and strong adaptability. Great breakthroughs have been made in the development and application of magnetic bearings at home and abroad, and they have been applied in many industrial fields.

[0003] The high-temperature gas-cooled reactor steam generator and the main helium fan adopt an integrated structure. In order to ensure the purity of the primary circuit coolant - helium, electromagnetic bearings are selected as the support and rotating equipment of the fan to drive the helium to circulate.

[0004] The electromagnetic bearing is an active magnetic bearing that uses electromagnetic force to suspend the bearing to achieve contactless and frictionless rotation between the rotor and the auxiliary bearing. In order to ensure the normal operation of the electromagnetic bearing, the gap between the rotor and the stator is an important indicator of the magnetic bearing. As a mechatronic device, the electrical characteristics and mechanical structure of the electromagnetic bearing need to be tested during commissioning and maintenance, among which gap detection is a major test item. At present, the electromagnetic bearings of the main helium blower lack the automatic gap detection function and need to be measured manually. The manual measurement method is time-consuming, inefficient, and costly, and cannot meet the needs of fast and accurate detection during on-site commissioning. Summary of the invention

[0005] The present invention provides a method, device, equipment and storage medium for detecting the clearance of an electromagnetic bearing of a high-temperature gas-cooled reactor, aiming to significantly shorten the on-site commissioning and maintenance time, improve the efficiency and economy of commissioning and maintenance, and enhance the operational reliability of the electromagnetic bearing system.

[0006] To this end, the first object of the present invention is to provide a method for detecting the clearance of an electromagnetic bearing of a high temperature gas-cooled reactor, comprising:

[0007] By attracting the electromagnet, the rotor of the first high-temperature gas-cooled reactor electromagnetic bearing is suspended at the center of the auxiliary bearing, the magnitude of the electromagnet current is gradually changed, and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing is correspondingly measured, a linear relationship between the electromagnet current and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing is established, and a mapping table is constructed;

[0008] During the operation of the high-temperature gas-cooled reactor electromagnetic bearings of the same batch as the first high-temperature gas-cooled reactor electromagnetic bearings, the real-time spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing is measured, and based on the corresponding real-time electromagnet current, a mapping table is searched to determine whether the spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing corresponding to the real-time electromagnet current in the mapping table is the same as the actually measured spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

[0009] The step of measuring the distance between the rotor of the electromagnetic bearing of the high temperature gas-cooled reactor and the auxiliary bearing includes:

[0010] By adjusting the current value of a pair of electromagnets arranged relatively along any axial direction of the auxiliary bearing, the rotor of the electromagnetic bearing of the high temperature gas-cooled reactor moves along the axial direction where the pair of electromagnets are located;

[0011] When the high temperature gas-cooled reactor electromagnetic bearing rotor moves axially toward the auxiliary bearing side, the distance between the high temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing is measured by a feeler gauge and recorded as the gap between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

[0012] Among them, while measuring the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the inner wall on the opposite side of the auxiliary bearing with a feeler gauge, a distance sensor is set to measure the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the inner wall on the opposite side of the auxiliary bearing. The measurement results of the feeler gauge and the distance sensor are compared. If they are inconsistent, re-measurement is performed.

[0013] Among them, when the rotor of the high-temperature gas-cooled reactor electromagnetic bearing contacts the auxiliary bearing, the auxiliary bearing undergoes elastic deformation. At this time, an inflection point appears in the approximate linear curve of current and displacement. The gap between the electromagnetic bearing rotor and the auxiliary bearing is determined with the help of the relationship between current and displacement.

[0014] Among them, when it is necessary to measure the bearing clearance, the rotor is moved in one direction and contacts the auxiliary bearing. Through the historical data of the current and the clearance in this direction, if the current inflection point is not calculated, it means that the range of rotor movement is not enough and it does not contact the auxiliary bearing. It is necessary to appropriately increase the movement range, that is, expand the extreme position until the current has an inflection point; calculate the clearance in this direction; move the rotor in the opposite direction, repeat the above steps, and calculate the reverse clearance; the sum of the positive clearance and the reverse clearance is the clearance value of the electromagnetic bearing in this direction.

[0015] Among them, the relationship between the power amplifier current and the gap in different directions of the auxiliary bearing is analyzed, and the inflection point of the current change when the rotor contacts the auxiliary bearing and undergoes elastic deformation is found. Through nonlinear fitting correction, the numerical relationship between the current and the gap is found.

[0016] The step of establishing a linear relationship between the electromagnet current and the spacing between the rotor and the auxiliary bearing of the high temperature gas-cooled reactor electromagnetic bearing and constructing a mapping table includes:

[0017] By changing the suspension position of the rotor, that is, adjusting the current of the electromagnet coil, and determining the position between the rotor and the auxiliary bearing by a feeler gauge, while observing the value of the position sensor;

[0018] Gradually increase the current, record the corresponding channel power amplifier current I at the same time, and continue to measure the actual gap with a feeler gauge on the rotor stand until the feeler gauge cannot be inserted;

[0019] Similarly, adjust the current value in the reverse direction, and record the amplifier current and gap point by point, until the rotor sticks to the other side of the auxiliary bearing again and the feeler gauge cannot be inserted;

[0020] The test was repeated many times to obtain the relationship among the power amplifier current, gap and position sensor when the rotor was in different positions.

[0021] The second object of the present invention is to provide a high temperature gas-cooled reactor electromagnetic bearing clearance detection device, comprising:

[0022] A mapping establishment module is used to suspend the rotor of the first high-temperature gas-cooled reactor electromagnetic bearing at the center of the auxiliary bearing by attracting the electromagnet, gradually change the magnitude of the electromagnet current, correspondingly measure the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing, establish a linear relationship between the electromagnet current and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing, and construct a mapping table;

[0023] The gap detection module is used to measure the real-time spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing during the operation of the high-temperature gas-cooled reactor electromagnetic bearing of the same batch as the first high-temperature gas-cooled reactor electromagnetic bearing, and to search the mapping table based on the corresponding real-time electromagnet current to determine whether the spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing corresponding to the real-time electromagnet current in the mapping table is the same as the actually measured spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

[0024] The third object of the present invention is to provide an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute each step in the method of the aforementioned technical solution.

[0025] A fourth object of the present invention is to provide a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute each step in the method according to the aforementioned technical solution.

[0026] Different from the prior art, the high temperature gas-cooled reactor electromagnetic bearing gap detection method provided by the present invention controls the high temperature gas-cooled reactor electronic bearing rotor to suspend in the auxiliary bearing ring through an electromagnet, and moves along the axial direction of the auxiliary bearing, measures the gap value between the rotor and the auxiliary bearing, constructs a linear relationship between the electromagnet current and the spacing between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing, and establishes a mapping table; in the same batch of electromagnets controlling the high temperature gas-cooled reactor electronic bearing working process, the electromagnet current and the corresponding spacing between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing are collected in real time, and the gap value corresponding to the collected electromagnet current in the mapping table is queried to determine whether the two are the same. Through the present invention, the on-site debugging and maintenance time can be greatly shortened, the debugging and maintenance efficiency, economy and operation reliability of the electromagnetic bearing system can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention and / or additional aspects and advantages will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 It is a flow chart of a method for detecting clearance of an electromagnetic bearing of a high-temperature gas-cooled reactor provided by the present invention.

[0029] Figure 2 It is a schematic diagram of the working principle of an electromagnetic bearing in a method for detecting gap of an electromagnetic bearing of a high-temperature gas-cooled reactor provided by the present invention.

[0030] Figure 3 It is a schematic diagram of a curve showing the relationship between current and displacement in a method for detecting gap of an electromagnetic bearing of a high-temperature gas-cooled reactor provided by the present invention.

[0031] Figure 4 It is a schematic diagram of current and gap measurement in a high-temperature gas-cooled reactor electromagnetic bearing gap detection method provided by the present invention.

[0032] Figure 5 It is a structural schematic diagram of a high-temperature gas-cooled reactor electromagnetic bearing gap detection device provided by the present invention.

[0033] Figure 6 It is a structural schematic diagram of a non-temporary computer-readable storage medium provided by the present invention. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] There are three main purposes for detecting the clearance of electromagnetic bearings:

[0036] 1. Check the clearance to determine whether the stator and rotor structure installation meets the requirements. Find problems such as loose structure and loose installation during installation;

[0037] 2. Through the clearance inspection, it is found that there may be impurities, damage to the auxiliary bearing or misalignment of the installation position;

[0038] 3. Use the results of the clearance test to indirectly verify whether the auxiliary bearing is intact after the bearing crashes or falls, thereby reducing the number of times the rotor is disassembled to observe the integrity of the bearing. Reduce the time required for operation and maintenance.

[0039] like Figure 1 As shown, a method for detecting clearance of an electromagnetic bearing of a high temperature gas-cooled reactor provided by an embodiment of the present invention includes:

[0040] S110: through the attraction of the electromagnet, the rotor of the first high-temperature gas-cooled reactor electromagnetic bearing is suspended at the center position of the auxiliary bearing, the magnitude of the electromagnet current is gradually changed, and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing is correspondingly measured, a linear relationship between the electromagnet current and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing is established, and a mapping table is constructed.

[0041] The step of measuring the clearance between the rotor and the auxiliary bearing of the electromagnetic bearing of a high temperature gas-cooled reactor includes:

[0042] By adjusting the current value of a pair of electromagnets arranged relatively along any axial direction of the auxiliary bearing, the rotor of the electromagnetic bearing of the high temperature gas-cooled reactor moves along the axial direction where the pair of electromagnets are located;

[0043] When the high temperature gas-cooled reactor electromagnetic bearing rotor moves axially toward the auxiliary bearing side, the distance between the high temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing is measured by a feeler gauge and recorded as the gap between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

[0044] While measuring the distance between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing with a feeler gauge, a distance sensor is set to measure the distance between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing. The measurement results of the feeler gauge and the distance sensor are compared. If there is any inconsistency, re-measurement is performed.

[0045] like Figure 2As shown, the rotor of the first electromagnetic bearing is suspended at the center of the auxiliary bearing by the attraction of the electromagnet, and its position between the auxiliary bearings is changed by the magnitude of the electromagnetic force. Through calculation and analysis, it can be known that when the rotor is suspended and not in contact with the auxiliary bearing, the electromagnet control current and the gap change are approximately linearly related. When the rotor of the first high temperature gas-cooled reactor electromagnetic bearing contacts the auxiliary bearing, the auxiliary bearing undergoes elastic deformation. At this time, the approximate linear curve of current and displacement has an inflection point, and the gap between the electromagnetic bearing rotor and the auxiliary bearing is judged with the help of the relationship between current and displacement. As shown in Figure 3 shown.

[0046] The relationship between the power amplifier current and the gap in different directions of the auxiliary bearing is analyzed, and the inflection point of the current change when the rotor contacts the auxiliary bearing and undergoes elastic deformation is found. Through nonlinear fitting correction, the numerical relationship between the current and the gap is found.

[0047] like Figure 4 As shown, the steps of establishing a linear relationship between the electromagnet current and the spacing between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing and constructing a mapping table include:

[0048] By changing the suspension position of the rotor, that is, adjusting the current of the electromagnet coil, and determining the position between the rotor and the auxiliary bearing by a feeler gauge, while observing the value of the position sensor;

[0049] Gradually increase the current, record the corresponding channel power amplifier current I at the same time, and continue to measure the actual gap with a feeler gauge on the rotor stand until the feeler gauge cannot be inserted;

[0050] Similarly, adjust the current value in the reverse direction, and record the amplifier current and gap point by point, until the rotor sticks to the other side of the auxiliary bearing again and the feeler gauge cannot be inserted;

[0051] The test was repeated many times to obtain the relationship among the power amplifier current, gap and position sensor when the rotor was in different positions.

[0052] S120: During the operation of the high-temperature gas-cooled reactor electromagnetic bearings of the same batch as the first high-temperature gas-cooled reactor electromagnetic bearings, measure the real-time spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing, and search the mapping table based on the corresponding real-time electromagnet current to determine whether the spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing corresponding to the real-time electromagnet current in the mapping table is the same as the actually measured spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

[0053] When the bearing clearance needs to be measured, the rotor is moved in one direction and contacts the auxiliary bearing. Through the historical data of the current and clearance in this direction, if the current inflection point is not calculated, it means that the rotor movement range is not enough and does not contact the auxiliary bearing. It is necessary to appropriately increase the movement range, that is, expand the extreme position until the current has an inflection point; calculate the clearance in this direction; move the rotor in the opposite direction, repeat the above steps, and calculate the clearance in the reverse direction; the sum of the positive clearance and the reverse clearance is the clearance value of the electromagnetic bearing in this direction.

[0054] like Figure 5 As shown, the present invention also provides a high temperature gas-cooled reactor electromagnetic bearing gap detection device, comprising:

[0055] A mapping establishment module 310 is used to suspend the rotor of the first high temperature gas-cooled reactor electromagnetic bearing at the center of the auxiliary bearing by attracting the electromagnet, gradually change the magnitude of the electromagnet current, correspondingly measure the distance between the rotor of the high temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing, establish a linear relationship between the electromagnet current and the distance between the rotor of the high temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing, and construct a mapping table;

[0056] The gap detection module 320 is used to measure the real-time gap between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing during the operation of the high-temperature gas-cooled reactor electromagnetic bearing of the same batch as the first high-temperature gas-cooled reactor electromagnetic bearing, and search the mapping table based on the corresponding real-time electromagnet current to determine whether the gap between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing corresponding to the real-time electromagnet current in the mapping table is the same as the actually measured gap between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

[0057] In order to implement the embodiment, the present invention also proposes an electronic device, comprising: at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute each step in the high-temperature gas-cooled reactor electromagnetic bearing gap detection method of the aforementioned technical solution.

[0058] like Figure 6 As shown, the non-transitory computer-readable storage medium includes a memory 810 of instructions, an interface 830, and the instructions can be executed by a processor 820 according to the high temperature gas-cooled reactor electromagnetic bearing clearance detection to complete the method. Optionally, the storage medium can be a non-transitory computer-readable storage medium, for example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0059] In order to implement the embodiment, the present invention further proposes a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the high-temperature gas-cooled reactor electromagnetic bearing clearance detection as in the embodiment of the present invention is implemented.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0063] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0064] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the described embodiment, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0065] A person skilled in the art may understand that all or part of the steps of implementing the method of the embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0066] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0067] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the embodiments are exemplary and cannot be construed as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the embodiments within the scope of the present invention.

Claims

1. A method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor, characterized in that: include: By attracting the electromagnet, the rotor of the first high-temperature gas-cooled reactor electromagnetic bearing is suspended at the center position of the auxiliary bearing, the magnitude of the electromagnet current is gradually changed, and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing is correspondingly measured, a linear relationship between the electromagnet current and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing is established, and a mapping table is constructed; During the operation of the high-temperature gas-cooled reactor electromagnetic bearings of the same batch as the first high-temperature gas-cooled reactor electromagnetic bearings, the real-time spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing is measured, and based on the corresponding real-time electromagnet current, the mapping table is searched to determine whether the spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing corresponding to the real-time electromagnet current in the mapping table is the same as the actually measured spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

2. The method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor according to claim 1, characterized in that: The step of measuring the distance between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing includes: By adjusting the current value of a pair of electromagnets arranged relatively along any axial direction of the auxiliary bearing, the rotor of the high temperature gas-cooled reactor electromagnetic bearing moves along the axial direction where the pair of electromagnets are located; When the high temperature gas-cooled reactor electromagnetic bearing rotor moves axially toward the auxiliary bearing, the distance between the high temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing is measured by a feeler gauge and recorded as the gap between the high temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

3. The method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor according to claim 2, characterized in that: While measuring the distance between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing with a feeler gauge, a distance sensor is set to measure the distance between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the inner wall on the opposite side of the auxiliary bearing, and the measurement results of the feeler gauge and the distance sensor are compared. If they are inconsistent, re-measurement is performed.

4. The method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor according to claim 1, characterized in that: When the electromagnetic bearing rotor of a high-temperature gas-cooled reactor contacts the auxiliary bearing, the auxiliary bearing undergoes elastic deformation. At this time, an inflection point appears in the approximate linear curve of current and displacement. The gap between the electromagnetic bearing rotor and the auxiliary bearing can be determined based on the relationship between current and displacement.

5. The method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor according to claim 2, characterized in that: When the bearing clearance needs to be measured, the rotor is moved in one direction and contacts the auxiliary bearing. Through the historical data of the current and clearance in this direction, if the current inflection point is not calculated, it means that the rotor movement range is not enough and does not contact the auxiliary bearing. It is necessary to appropriately increase the movement range, that is, expand the extreme position until the current has an inflection point; calculate the clearance in this direction; move the rotor in the opposite direction, repeat the above steps, and calculate the clearance in the reverse direction; the sum of the positive clearance and the reverse clearance is the clearance value of the electromagnetic bearing in this direction.

6. The method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor according to claim 5, characterized in that: The relationship between the power amplifier current and the gap in different directions of the auxiliary bearing is analyzed, and the inflection point of the current change when the rotor contacts the auxiliary bearing and undergoes elastic deformation is found. Through nonlinear fitting correction, the numerical relationship between the current and the gap is found.

7. The method for detecting clearance of electromagnetic bearings of a high temperature gas-cooled reactor according to claim 1, characterized in that: The step of establishing a linear relationship between the electromagnetic current and the spacing between the rotor and the auxiliary bearing of the high temperature gas-cooled reactor electromagnetic bearing and constructing a mapping table includes: By changing the suspension position of the rotor, that is, adjusting the current of the electromagnet coil, and determining the position between the rotor and the auxiliary bearing by a feeler gauge, while observing the value of the position sensor; Gradually increase the current, record the corresponding channel power amplifier current I at the same time, and continue to measure the actual gap with a feeler gauge on the rotor stand until the feeler gauge cannot be inserted; Similarly, adjust the current value in the reverse direction, and record the amplifier current and gap point by point, until the rotor sticks to the other side of the auxiliary bearing again and the feeler gauge cannot be inserted; The test was repeated many times to obtain the relationship among the power amplifier current, gap and position sensor when the rotor was in different positions.

8. A high temperature gas-cooled reactor electromagnetic bearing clearance detection device, characterized in that: include: A mapping establishment module is used to suspend the rotor of the first high-temperature gas-cooled reactor electromagnetic bearing at the center of the auxiliary bearing by attracting the electromagnet, gradually change the magnitude of the electromagnet current, correspondingly measure the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing, establish a linear relationship between the electromagnet current and the distance between the rotor of the high-temperature gas-cooled reactor electromagnetic bearing and the auxiliary bearing, and construct a mapping table; The gap detection module is used to measure the real-time spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing during the operation of the high-temperature gas-cooled reactor electromagnetic bearing of the same batch as the first high-temperature gas-cooled reactor electromagnetic bearing, and search the mapping table based on the corresponding real-time electromagnet current to determine whether the spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing corresponding to the real-time electromagnet current in the mapping table is the same as the actually measured spacing between the high-temperature gas-cooled reactor electromagnetic bearing rotor and the auxiliary bearing.

9. An electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform each step in the method described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute each step of the method according to any one of claims 1 to 7.

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