A liquid metal bearing CT tube rotor monitoring system

Abstract

This invention relates to the field of radiological diagnostic instrument technology, specifically to a liquid metal bearing CT tube rotor monitoring system, comprising: a rotor body, a monitoring module, a thermoelectric power generation module, and a power management module. The rotor body includes a rotor shaft and a bearing sleeve, with the bearing sleeve fitted onto the rotor shaft. The monitoring module, thermoelectric power generation module, and power management module are respectively disposed on the outer cylindrical surface of the bearing sleeve. The monitoring module is used to monitor the state of the rotor body and collect one or more data on the rotor body's temperature, rotational speed, and vibration. The thermoelectric power generation module is used to generate electrical energy. The power management module, disposed on the outer cylindrical surface of the bearing sleeve, is used to store the electrical energy generated by the thermoelectric power generation module and to provide power to the monitoring module. The CT tube rotor monitoring system provided by this application can achieve self-circulating energy utilization, requires no external power supply, and can monitor the rotor state in real time, accurately, and directly.

Description

Technical Field

[0001] This invention belongs to the field of radiological diagnostic instrument technology, and particularly relates to a liquid metal bearing CT tube rotor monitoring system. Background Technology

[0002] CT (Computed Tomography) is a radiographic procedure that uses a precisely collimated X-ray beam, along with a highly sensitive detector, to scan a specific part of the body section by section. It is characterized by fast scan times and clear images. CT equipment is widely used in medical diagnostics as a radiological diagnostic instrument. The CT tube, as the X-ray signal source of the CT equipment, is one of the most crucial components; its performance directly affects the image quality and lifespan of the CT scanner. With the development of multi-slice spiral CT technology, continuous, uninterrupted scanning is required, and the required X-ray dose is increasing, thus demanding higher heat capacity from the CT tube. This increased heat capacity necessitates continuous improvements in tube materials and the structure of the rotating anode. Consequently, CT tubes are prone to various problems, including multiple causes of failure, susceptibility to malfunctions, poor self-protection capabilities, and unpredictable lifespan.

[0003] The CT tube mainly consists of key components such as a vacuum glass cover, cathode filament, and rotating anode. The rotating anode comprises a target surface, rotor, and bearings. The target surface receives electron bombardment, dissipates heat, and reflects X-rays through a specific target angle. The rotor drives the rotating anode target to rotate, and the bearings support the rotor's rotation. The bearings have a significant impact on the overall structure of the CT tube. Therefore, monitoring the rotor bearings of the CT tube is particularly important.

[0004] Currently, existing CT tube monitoring indirectly monitors the rotor's operating status by detecting the rotational speed, temperature, and vibration of the CT tube's outer shell or fixed spindle. However, these signals are often distorted or delayed due to filtering by the bearing fluid film or attenuation by the outer shell, making it difficult to reflect the true operating status of the rotor device. Consequently, it is impossible to accurately monitor the operation of each component inside the CT tube in real time, meaning that the problem can only be discovered after the CT tube malfunctions. Once a malfunction occurs, it not only results in significant economic losses but also affects patient treatment due to prolonged downtime for repairs.

[0005] Furthermore, during CT tube operation, the high-speed electron beam emitted by the electron gun continuously bombards the rapidly rotating anode target disk. Approximately 99% of the electron kinetic energy is converted into heat energy, causing the local temperature on the target disk surface to rise sharply to over 2000°C. To ensure the normal operation of the X-ray tube, CT tubes now commonly employ forced water cooling systems for heat dissipation, creating a significant temperature gradient on components such as bearing sleeves, resulting in a temperature difference of several hundred degrees Celsius between the hot and cold ends.

[0006] Currently, the large temperature difference generated by the normal operation of the X-ray tube is only considered as "waste heat" that needs to be dissipated, and the energy it contains is not being effectively utilized. Meanwhile, to monitor the bearing's operating status, an external power supply is needed to power the sensors and complex signal wiring is required. This not only increases system complexity and cost but may also adversely affect the bearing's dynamic performance and the high-vacuum environment.

[0007] Existing CT tube bearing condition monitoring systems have significant shortcomings: First, the reliability of the external power supply system is difficult to guarantee in high vacuum and high speed environments; second, complex wiring can affect the dynamic balance of bearing components and may damage vacuum sealing performance; third, traditional monitoring schemes cannot achieve real-time and accurate monitoring of bearing condition, and cannot provide effective data support for preventive maintenance.

[0008] Therefore, how to provide a CT tube rotor monitoring system that can achieve self-circulation of energy, requires no external power supply, and can monitor the rotor status in real time, accurately and directly is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0009] To solve at least one of the above-mentioned technical problems, the present invention provides a liquid metal bearing CT X-ray tube rotor monitoring system, comprising:

[0010] The rotor body includes a rotor shaft, a spindle, a bearing sleeve, and a liquid metal film. The bearing sleeve is fitted onto the rotor shaft, and the rotor shaft is fitted onto the spindle. The end of the bearing sleeve away from the rotor shaft is connected to the anode target disk, and the liquid metal film is disposed between the end of the spindle near the rotor shaft and the rotor shaft.

[0011] A monitoring module is disposed on the outer cylindrical surface of the bearing sleeve. The monitoring module is used to monitor the state of the rotor body and collect one or more of the rotor body's temperature, speed, and vibration data.

[0012] A thermoelectric power generation module is disposed on the outer cylindrical surface of the bearing sleeve, and the thermoelectric power generation module is used to generate electrical energy.

[0013] A power management module is disposed on the outer cylindrical surface of the bearing sleeve. The power management module is electrically connected to the thermoelectric generator and the monitoring module. The power management module is used to store the electrical energy generated by the thermoelectric generator and to provide electrical energy to the monitoring module.

[0014] Furthermore, multiple mounting platforms are provided on the outer cylindrical surface of the bearing sleeve, and the multiple mounting platforms are spaced apart along the circumference of the bearing sleeve. The mounting platforms are used to install the thermoelectric power generation module.

[0015] Furthermore, the thermoelectric power generation module includes multiple thermoelectric power generation elements, which are spaced apart and correspond one-to-one with the installation platform. The multiple thermoelectric power generation elements are respectively installed on the corresponding installation platform.

[0016] Furthermore, each of the thermoelectric generators is arranged in a strip shape, with the end of the thermoelectric generator closer to the anode target plate being designated as the hot end and the end of the thermoelectric generator farther from the anode target plate being designated as the cold end, and the temperature of the hot end being higher than the temperature of the cold end.

[0017] Furthermore, the thermoelectric power generation module also includes multiple heat-insulating filler blocks, which are disposed on the outer cylindrical surface of the bearing sleeve and located between every two adjacent thermoelectric power generation plates.

[0018] Furthermore, the power management module includes multiple power management units, each corresponding to one of the multiple thermoelectric generators. The multiple power management units are respectively disposed between every two adjacent thermoelectric generators, and the power management units are used to provide power to the monitoring module.

[0019] Furthermore, the power management unit includes an energy harvesting chip, an energy storage element, a voltage regulator, and a circuit board. The energy harvesting chip, the energy storage element, the voltage regulator, and the energy storage element are all mounted on the circuit board, and the circuit board is electrically connected to the monitoring module and the corresponding thermoelectric generator. The energy harvesting chip is used to harvest the electrical energy generated by the thermoelectric generator, the energy storage element is used to store the electrical energy harvested by the energy harvesting chip, and the voltage regulator is used to control the input and output voltage of the energy storage element and provide power to the monitoring module.

[0020] Furthermore, the monitoring module includes:

[0021] A plurality of temperature sensors are respectively disposed on the outer cylindrical surface of the bearing sleeve, and each temperature sensor is disposed between two adjacent thermoelectric generators. The plurality of temperature sensors are disposed in one-to-one correspondence with the plurality of power management units, and each temperature sensor is electrically connected to the corresponding power management unit. The temperature sensors are used to monitor and collect the temperature of the rotor body.

[0022] A speed sensor is provided, with multiple speed sensors respectively disposed on the outer cylindrical surface of the bearing sleeve, and each speed sensor is disposed between two adjacent thermoelectric generators. The multiple speed sensors are disposed one-to-one with multiple power management units, and each speed sensor is electrically connected to the corresponding power management unit. The speed sensor is used to monitor and collect the speed of the rotor body.

[0023] Furthermore, the monitoring module also includes vibration sensors. Multiple vibration sensors are respectively disposed on the outer cylindrical surface of the bearing sleeve, and each vibration sensor is correspondingly disposed between two adjacent thermoelectric generators. Multiple vibration sensors are disposed in one-to-one correspondence with multiple power management units, and each vibration sensor is electrically connected to the corresponding power management unit. The vibration sensors are used to monitor and collect vibration data of the rotor body.

[0024] Furthermore, the monitoring module also includes a microcontroller, a data transmission unit, and a cloud platform. The microcontroller and the data transmission unit are both mounted on the outer cylindrical surface of the bearing sleeve, and are located close to the monitoring module. The microcontroller and the data transmission unit are both electrically connected to the monitoring module and the power management module. The microcontroller is used to acquire and package the temperature, rotational speed, and vibration data collected in the monitoring module. The data transmission unit is used to receive and transmit the data input by the microcontroller. The cloud platform is used to receive the data transmitted by the data transmission unit.

[0025] This invention provides a liquid metal bearing CT tube rotor monitoring system. It comprises a rotor body, a monitoring module, a thermoelectric power generation module, and a power management module. The rotor body includes a rotor shaft, a mandrel, a bearing sleeve, and a liquid metal film. The bearing sleeve is fitted onto the rotor shaft, and the rotor shaft is fitted onto the mandrel. The end of the bearing sleeve furthest from the rotor shaft is connected to an anode target. The liquid metal film is disposed between the end of the mandrel closest to the rotor shaft and the rotor shaft. By directly mounting the monitoring module, thermoelectric power generation module, and power management module on the outer cylindrical surface of the bearing sleeve, this invention allows the monitoring module to directly monitor the state of the rotor body and collect its temperature, rotational speed, and vibration data. This enables direct and accurate monitoring of the rotational speed, temperature, and vibration signals of the liquid metal bearing CT tube rotor, avoiding signal filtering, attenuation, or delay, and accurately reflecting the working state of the rotor structure. Furthermore, by arranging the thermoelectric power generation module and the power management module on the outer cylindrical surface of the bearing sleeve, the present invention enables the present invention to generate electrical energy by utilizing the heat energy generated by the anode target plate at one end of the rotor body through the thermoelectric power generation module, and to store the electrical energy through the power management module and provide power to the monitoring module. This achieves energy self-circulation, eliminates the need for external power supply, and enables direct, real-time, and accurate monitoring of the rotor body's status, saving energy and improving the efficiency and quality of monitoring. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. In the drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0027] Figure 1 This is an exploded view of an embodiment of a liquid metal bearing CT tube rotor monitoring system according to the present invention;

[0028] Figure 2 This is an exploded view of another embodiment of the liquid metal bearing CT tube rotor monitoring system of the present invention;

[0029] Figure 3 This is a partial schematic diagram of an embodiment of a liquid metal bearing CT tube rotor monitoring system according to the present invention;

[0030] Figure 4 This is a flowchart illustrating an embodiment of a liquid metal bearing CT tube rotor monitoring system according to the present invention.

[0031] Figure 5 This is a flowchart illustrating the intelligent diagnosis and maintenance process of an embodiment of a liquid metal bearing CT tube rotor monitoring system according to the present invention.

[0032] Key component symbols: 100-CT X-ray tube rotor monitoring system; 110-rotor body; 111-bearing sleeve; 112-rotor shaft; 113-spindle; 114-liquid metal film; 115-thrust disk; 120-monitoring module; 121-temperature sensor; 122-speed sensor; 123-vibration sensor; 124-sensor platform; 130-thermoelectric generator module; 131-thermoelectric generator plate; 140-power management module; 141-power management unit. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0035] It should also be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., these directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. Furthermore, if the embodiments of the present invention involve descriptions such as "first," "second," "S1," "S2," "step one," "step two," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance, or implicitly indicating the number of technical features indicated or the order of method execution. Those skilled in the art will understand that anything that does not violate the inventive concept and does not contradict the inventive points should be included within the scope of protection of the present invention.

[0036] like Figure 1 and Figure 3As shown, the present invention provides a liquid metal bearing CT tube rotor monitoring system 100, which includes a rotor body 110, a monitoring module 120, a thermoelectric power generation module 130, and a power management module 140.

[0037] The rotor body 110 includes a rotor shaft 112, a spindle 113, a bearing sleeve 111, and a liquid metal film 114. The bearing sleeve 111 is sleeved on the rotor shaft 112, the rotor shaft 112 is sleeved on the spindle 113, and the end of the bearing sleeve 111 away from the rotor shaft 112 is connected to the anode target disk. The liquid metal film 114 is disposed between the end of the spindle 113 near the rotor shaft 112 and the rotor shaft 112.

[0038] It should be noted that the end of the mandrel 113 located inside the rotor shaft 112 forms a radial gap of 10 to 50 micrometers with the inner wall of the rotor shaft 112, and a gallium-tin alloy is filled in this gap to form a liquid metal film 114. Preferably, the bearing sleeve 111 is made of high-strength copper alloy.

[0039] Specifically, the monitoring module 120 is disposed on the outer cylindrical surface of the bearing sleeve 111. The present invention uses the monitoring module 120 to monitor the state of the rotor body 110 and collect one or more of the following: temperature data, rotational speed data, and vibration data of the rotor body 110. Specifically, the type of data collected is determined according to the monitoring requirements; preferably, temperature data, rotational speed data, and vibration data of the rotor body are collected simultaneously.

[0040] Furthermore, the thermoelectric power generation module 130 is disposed on the outer cylindrical surface of the bearing sleeve 111. This invention utilizes the heat energy at the anode target plate to generate electrical energy through the thermoelectric power generation module 130. Liquid metal has extremely high thermal conductivity, enabling rapid transfer of heat from the anode target plate to the bearing sleeve. In this embodiment, the power management module 140 is disposed on the outer cylindrical surface of the bearing sleeve 111. The power management module 140 is electrically connected to the thermoelectric power generation module and also electrically connected to the monitoring module 120. This invention stores the electrical energy generated by the thermoelectric power generation module 130 through the power management module and provides power to the monitoring module 120.

[0041] Compared to existing technologies, current CT tube monitoring indirectly monitors the rotor's operating status by detecting the rotational speed, temperature, and vibration of the CT tube casing or fixed spindle 113. However, these signals are often distorted or delayed due to filtering by the bearing fluid film or attenuation by the casing, making it difficult to reflect the true operating status of the rotor assembly and thus impossible to accurately monitor the operation of components within the CT tube in real time. Furthermore, existing CT tube bearing condition monitoring systems have significant shortcomings: firstly, the reliability of the external power supply system is difficult to guarantee under high vacuum and high speed environments; secondly, complex wiring can affect the dynamic balance of bearing components and may damage vacuum sealing performance; and thirdly, traditional monitoring schemes cannot achieve real-time and accurate monitoring of bearing status, failing to provide effective data support for preventative maintenance.

[0042] In this embodiment, a liquid metal bearing CT tube rotor monitoring system 100 of the present invention includes a rotor body 110, a monitoring module 120, a thermoelectric power generation module 130, and a power management module 140. The rotor body 110 includes a rotor shaft 112, a bearing sleeve 111, and a liquid metal film 114. The bearing sleeve 111 is sleeved on the rotor shaft 112, and one end of the bearing sleeve 111 away from the rotor shaft 112 is connected to an anode target disk. The liquid metal film 114 is disposed between the rotor shaft 112 and the bearing sleeve 111. This invention directly mounts the monitoring module 120, the thermoelectric generator module 130, and the power management module 140 on the outer cylindrical surface of the bearing sleeve 111. This allows the monitoring module 120 to directly monitor the state of the rotor body 110 and collect its temperature, speed, and vibration data. This enables direct and accurate monitoring of the speed, temperature, and vibration signals of the liquid metal bearing CT tube rotor, avoiding signal filtering, attenuation, or delay, and accurately reflecting the working state of the rotor structure. Furthermore, by arranging the thermoelectric power generation module 130 and the power management module 140 on the outer cylindrical surface of the bearing sleeve 111, the present invention enables the present invention to generate electrical energy by utilizing the heat energy generated by the anode target plate at one end of the rotor body 110 through the thermoelectric power generation module 130, and to store the electrical energy through the power management module 140 and provide power to the monitoring module 120. This achieves energy self-circulation, eliminates the need for external power supply, avoids complex wiring, and enables direct, real-time, and accurate monitoring of the rotor body 110's status, saving energy, improving monitoring efficiency and quality, and providing effective data support for preventive maintenance.

[0043] Furthermore, in this embodiment, the monitoring module 120, the thermoelectric power generation module 130, and the power management module 140, mounted on the outer cylindrical surface of the bearing sleeve, can serve as compensable counterweights for the rotor body 110. Specifically, based on the initial imbalance of the anode target disk and the bearing sleeve 111 assembly, the monitoring function of the liquid metal bearing CT tube rotor monitoring system 100 in this embodiment can be integrated with its dynamic balance compensation function by adjusting the angles and number of the monitoring module 120, the thermoelectric power generation module 130, and the power management module 140 on the circumference of the bearing sleeve 111. This not only simplifies the traditional dynamic balancing process but also ensures that the monitoring module 120, the thermoelectric power generation module 130, and the power management module 140 are in the optimal dynamic operating environment, thereby reducing stress concentration and extending service life. Meanwhile, in this embodiment, the monitoring module 120, the thermoelectric power generation module 130 and the power management module 140 are installed in the bearing sleeve 111 to form a composite structure, which increases the radial dimension and bending stiffness of the bearing sleeve 111, suppresses the end face runout of the anode target disk under high speed rotation, and improves the focus stability of its CT scan.

[0044] Optionally, such as Figure 2 and Figure 3 As shown, the rotor body 110 also includes a thrust disk 115, which is disposed between the rotor shaft 112 and the bearing sleeve 111. In this embodiment, the rotor shaft 112 and the bearing sleeve 111 are connected by the thrust disk 115 so that the rotor shaft 112 drives the bearing sleeve 111.

[0045] In this embodiment, a plurality of mounting platforms are provided on the outer cylindrical surface of the bearing sleeve 111. The plurality of mounting platforms are spaced apart along the circumference of the bearing sleeve 111 and are evenly distributed on the outer cylindrical surface of the bearing sleeve 111. The mounting platforms are used to mount the thermoelectric power generation module 130.

[0046] Optionally, each mounting platform is elongated and extends axially along the bearing sleeve 111. Specifically, in this embodiment, the surface of the mounting platform of the bearing sleeve 111 is polished or nickel-plated to ensure its surface flatness, facilitating the installation of the thermoelectric power generation module 130 on the mounting platform.

[0047] It should be noted that this embodiment does not limit the specific number of mounting platforms on the bearing sleeve 111. The specific number of mounting platforms can be designed according to actual production needs. Optionally, in this embodiment, the specific number of mounting platforms is, for example, twelve.

[0048] Optionally, such as Figure 2 and Figure 3As shown, the thermoelectric power generation module 130 includes a plurality of thermoelectric power generation elements 131, which are spaced apart and are arranged in a one-to-one correspondence with the installation platform. The plurality of thermoelectric power generation elements 131 are respectively installed on the corresponding installation platform.

[0049] It should be noted that this embodiment does not limit the specific number of the thermoelectric generators 131. Provided that the thermoelectric generators 131 are configured in a one-to-one correspondence with the mounting platform, the specific number of the thermoelectric generators 131 can be designed according to actual production needs. Optionally, in this embodiment, the specific number of thermoelectric generators 131 is, for example, twelve. The elongated thermoelectric generators are distributed circumferentially, enabling them to sense temperature differences at different locations of the bearing and identify localized overheating or abnormal liquid metal film.

[0050] Specifically, each of the thermoelectric generators 131 in this embodiment is arranged in a long strip shape. Optionally, the long strip thermoelectric generator 131 is made of silicon-germanium high-temperature thermoelectric material, so that it can work at 600°C or higher, thereby adapting to the high-temperature working environment at the anode target plate.

[0051] Specifically, each of the elongated thermoelectric generator strips 131 comprises 80-90% of the axial length of the bearing sleeve 111, 8%-10% of its circumferential width, and 3-5 mm in thickness. The temperature gradient of the liquid metal rotor body 110 is mainly concentrated in the central axial region, and this length range precisely covers the core hot zone of the rotor body 110, ensuring that the most significant temperature change signals can be captured. The ends 10%-20% are not installed, avoiding the temperature disturbance zone at the connection between the rotor body 110 and the end cover, and the low-temperature zone near the cooling channel, thus improving measurement accuracy. The use of an 8%-10% width in conjunction with the arrangement of multiple thermoelectric generator strips 131 enables 360° all-around temperature monitoring, identifying circumferential temperature differences. When the liquid metal film experiences localized thinning or abnormal flow, it will cause a temperature rise in the corresponding area; this width design allows for precise location of the fault area. Furthermore, the thickness of the thermoelectric generator 131 ranges from 3 to 5 mm, ensuring efficient heat conduction at its hot end while maintaining a sufficient temperature difference between the cold and hot ends to maximize the Seebeck effect voltage output and prevent thermal short circuits. If the thermoelectric generator 131 is too thin (less than 3 mm), direct heat conduction between the cold and hot ends will occur, reducing thermoelectric power generation efficiency. Conversely, if the thermoelectric generator 131 is too thick (greater than 5 mm), its thermal resistance will increase, slowing down the thermal response speed. Optionally, the length of each elongated thermoelectric generator 131 is, for example, 80%, 85.5%, or 90% of the axial length of the bearing sleeve 111, and its width is, for example, 8%, 9.5%, or 10% of the circumferential width of the bearing sleeve 111, while its thickness is, for example, 3 mm, 4.5 mm, or 5 mm.

[0052] It should be noted that the end of the thermoelectric generator 131 closest to the anode target plate is designated as the hot end, and the end of the thermoelectric generator 131 furthest from the anode target plate is designated as the cold end. Furthermore, the temperature of the hot end of the thermoelectric generator 131 is higher than the temperature of the cold end. Specifically, when the liquid metal bearing CT tube is working, the temperature of the hot end of the bearing sleeve 111 closest to the anode target plate can reach over 1000℃, while the cold end of the bearing sleeve 111 furthest from the anode target plate is maintained at approximately 40℃ by a water-cooling device. This creates an effective temperature difference between the two ends of the bearing sleeve 111, i.e., an effective temperature difference between the hot and cold ends of the thermoelectric generator 131, thereby generating direct current (DC) energy through the thermoelectric generator 131.

[0053] Optionally, the thermoelectric power generation module 130 further includes a plurality of heat-insulating filler blocks, which are disposed on the outer cylindrical surface of the bearing sleeve 111 and located between every two adjacent thermoelectric power generation elements 131. Specifically, the plurality of heat-insulating filler blocks are, for example, heat-insulating filler materials made of ceramic fibers. In this embodiment, by filling the spaces between adjacent thermoelectric power generation elements 131 with heat-insulating filler material, the temperature difference is stabilized, the mutual influence between adjacent thermoelectric power generation elements 131 is effectively reduced, and the operating quality of each thermoelectric power generation element 131 is improved.

[0054] In this embodiment, as Figure 2 and Figure 3 As shown, the power management module 140 includes a plurality of power management units 141, each of which corresponds to a plurality of thermoelectric generators 131. The plurality of power management units 141 are respectively disposed between every two adjacent thermoelectric generators 131. The power management units 141 are used to provide power to the monitoring module 120.

[0055] Optionally, the length of the power management unit 141 is, for example, 15-25 mm, the width is, for example, 5-7 mm, and the height is, for example, 3-5 mm. Preferably, in this embodiment, the power management unit 141 has a length of, for example, 15 mm, a width of, for example, 5 mm, and a height of, for example, 3 mm.

[0056] It should be noted that this embodiment does not limit the specific number of the power management units 141. Provided that the power management units 141 and the thermoelectric generators 131 are configured in a one-to-one correspondence, the specific number of the power management units 141 can be designed according to actual production needs. Optionally, in this embodiment, the specific number of power management units 141 is, for example, twelve.

[0057] Optionally, the power management unit 141 includes an energy harvesting chip, an energy storage element, a voltage regulator, and a circuit board. Specifically, in this embodiment, the circuit board is, for example, a PCB (Printed Circuit Board).

[0058] In this embodiment, the energy harvesting chip, the energy storage element, the voltage regulator, and the energy storage element are all mounted on the circuit board. This circuit board connects and controls the energy harvesting chip, the energy storage element, the voltage regulator, and the energy storage element. Furthermore, the circuit board is electrically connected to the monitoring module 120 and the corresponding thermoelectric generator 131. Specifically, in this embodiment, the power management unit 141 is fixed in a reserved position between adjacent thermoelectric generators 131, and a high-temperature resistant conductive wire is used to connect the circuit between the power management unit 141 and the corresponding thermoelectric generator 131. Optionally, the current carrying capacity of the high-temperature resistant conductive wire in this embodiment is, for example, 3-5 amperes, and the insulation material of the high-temperature resistant conductive wire is, for example, polytetrafluoroethylene (PTFE).

[0059] Specifically, in this embodiment, the energy harvesting chip is used to harvest electrical energy generated by the thermoelectric generator 131, and the energy storage element is used to store the electrical energy harvested by the energy harvesting chip. In this embodiment, the voltage of the electrical energy harvested by the energy harvesting chip is stabilized by the voltage regulator, and the regulated electrical energy is stored in the energy storage element. Furthermore, the voltage regulator can output the electrical energy from the energy storage element to the monitoring module 120, thereby providing a stable power supply to the monitoring module 120. This avoids the need for an external power supply and complex wiring structures, utilizes internal energy self-circulation, avoids energy waste, and reduces costs.

[0060] It should be noted that the energy storage element in this embodiment is, for example, a supercapacitor. A supercapacitor, also known as an electrochemical capacitor, gold capacitor, or farad capacitor, is a novel energy storage device that falls between traditional capacitors and rechargeable batteries. It possesses both the rapid charging and discharging characteristics of capacitors and the energy storage characteristics of batteries. A supercapacitor is an electrochemical element; no chemical reaction occurs during its energy storage process, which is reversible. Supercapacitors offer advantages such as fast charging and discharging, long cycle life, high power, and high safety. Preferably, this embodiment uses a supercapacitor as the energy storage element, with a rated voltage of, for example, 5.5V and a capacitance of, for example, 1~10 farads.

[0061] Optionally, the power management unit 141 in this embodiment further includes a metal casing and heat dissipation fins. In this embodiment, the energy harvesting chip, energy storage element, voltage regulator, and circuit board are all encapsulated within the metal casing, and heat dissipation fins are provided on the metal casing for heat dissipation. Optionally, the metal casing is, for example, an aluminum alloy casing.

[0062] Optionally, such as Figure 2As shown, the monitoring module 120 includes temperature sensors 121. Multiple temperature sensors 121 are respectively disposed on the outer cylindrical surface of the bearing sleeve 111, and each temperature sensor 121 is correspondingly disposed between two adjacent thermoelectric generators 131. Each of the multiple temperature sensors 121 corresponds one-to-one with a multiple power management unit 141, and each temperature sensor 121 is electrically connected to its corresponding power management unit 141 via a high-temperature resistant conductive wire. In this embodiment, the power management unit 141 provides power to the temperature sensors 121, thereby achieving self-powering. In this embodiment, the temperature sensors 121 are used to monitor and collect the temperature of the rotor body 110.

[0063] It should be noted that this embodiment does not limit the specific number of temperature sensors 121, and the specific number of temperature sensors 121 can be designed according to actual production needs. Optionally, the number of temperature sensors 121 in this embodiment is, for example, twelve. In this embodiment, the temperature sensor 121 is, for example, a resistance temperature detector (RTD) sensor.

[0064] like Figure 2 As shown, the monitoring module 120 also includes speed sensors 122. Multiple speed sensors 122 are respectively disposed on the outer cylindrical surface of the bearing sleeve 111, and each speed sensor 122 is correspondingly disposed between two adjacent thermoelectric generators 131. Each speed sensor 122 is correspondingly disposed with one of the multiple power management units 141, and each speed sensor 122 is electrically connected to its corresponding power management unit 141. In this embodiment, the power management unit 141 provides power to the speed sensors 122, thereby achieving self-powering. The speed sensors 122 are used to monitor and collect the rotational speed of the rotor body 110.

[0065] Optionally, the speed sensor 122 in this embodiment is, for example, a Hall effect sensor, which cooperates with a permanent magnet, and the gap between the Hall effect sensor and the permanent magnet is in the range of 0.5 to 2 mm. Optionally, the gap between the Hall effect sensor and the permanent magnet is 0.5 mm, 1 mm, or 2 mm.

[0066] It should be noted that this embodiment does not limit the specific number of speed sensors 122, and the specific number of speed sensors 122 can be designed according to actual production needs. Optionally, in this embodiment, the number of speed sensors 122 is, for example, twelve.

[0067] like Figure 2As shown, the monitoring module 120 also includes vibration sensors 123. Multiple vibration sensors 123 are respectively disposed on the outer cylindrical surface of the bearing sleeve 111, and each vibration sensor 123 is correspondingly disposed between two adjacent thermoelectric generators 131. Each vibration sensor 123 is associated with a corresponding power management unit 141, and each vibration sensor 123 is electrically connected to its corresponding power management unit 141. In this embodiment, the power management unit 141 provides power to the vibration sensors 123, thereby enabling them to be self-powered. The vibration sensors 123 are used to monitor and collect vibration data of the rotor body 110. In this embodiment, by directly and accurately monitoring the vibration signal of the rotor body 110, abnormal amplitude characteristics can be used to predict the rupture of the liquid metal film 114, and the amplitude and phase at both ends of the rotor body 110 can be used to predict rotor body 110 jamming, thereby stopping the machine in advance, preventing rotor body 110 malfunctions, and improving the service life of the liquid metal bearing CT tube.

[0068] It should be noted that this embodiment does not limit the specific number of vibration sensors 123, and the specific number of vibration sensors 123 can be designed according to actual production needs. Optionally, in this embodiment, the number of vibration sensors 123 is, for example, twelve.

[0069] Among them, the vibration sensor 123 is, for example, a MEMS (Micro-Electro-Mechanical Systems) accelerometer. The MEMS accelerometer adopts micro-electro-mechanical system technology, which integrates mechanical system and electronic circuit into an extremely small size using silicon semiconductor processing technology. The mechanical system converts vibration signals into electrical signals, and the electronic circuit completes the acquisition and processing of electrical signals. The two form a cooperative system to realize some complex functions such as intelligent detection and analysis of vibration signals.

[0070] Optionally, such as Figure 3 As shown, in this embodiment, a plurality of sensor platforms are also provided on the outer cylindrical surface of the bearing sleeve 111. Each sensor platform is correspondingly set in a reserved position between two adjacent thermoelectric generators 131, and each sensor platform is set close to its corresponding power management unit 141.

[0071] Specifically, in this embodiment, the temperature sensor 121 is threaded onto the sensor platform, and the speed sensor 122 is fixed in the mounting hole of the sensor platform. Additionally, the vibration sensor 123 is fixed to the measuring point of the sensor platform via its mounting base. Specifically, after the power management unit 141, thermoelectric generator 131, temperature sensor 121, speed sensor 122, and vibration sensor 123 are installed on the bearing sleeve 111, the circuit is connected via high-temperature resistant conductive wire, completing the wiring and sealing process.

[0072] Optionally, the monitoring module 120 further includes a microcontroller and a data transmission unit. The liquid metal bearing CT tube rotor monitoring system 100 in this embodiment also includes a cloud platform, which receives data from the rotor body 110 transmitted by the data transmission unit. Both the microcontroller and the data transmission unit are mounted on the outer cylindrical surface of the bearing sleeve 111, and are positioned close to the temperature sensor 121, speed sensor 122, and vibration sensor 123. Both are electrically connected to these sensors. In this embodiment, the microcontroller reads the signals collected by each sensor and packages them into data packets, which are then transmitted to the data transmission unit via electrical connection. Furthermore, the data transmission unit outputs the data to the cloud platform wirelessly, achieving wireless data transmission and solving the problem of "inability to wire on vacuum rotating parts."

[0073] Specifically, such as Figure 4 As shown, the specific workflow of the liquid metal bearing CT tube rotor monitoring system 100 in this embodiment is as follows: Each thermoelectric generator 131 generates electrical energy using the large temperature difference between its two ends. Each corresponding power management unit 141 stores this electrical energy, and then each power management unit 141 supplies power to its corresponding temperature sensor 121, speed sensor 122, and vibration sensor 123, thus achieving energy self-circulation and self-powering. Furthermore, the temperature sensor 121, speed sensor 122, and vibration sensor 123 around the outer cylindrical surface of the bearing sleeve 111 collect their corresponding signals in real time. The microcontroller reads the signals collected by the temperature sensor 121, speed sensor 122, and vibration sensor 123, packages the signals into data packets, and then transmits them to the data transmission unit via electrical connection. The data transmission unit then outputs the data to the cloud platform via wireless transmission.

[0074] In this embodiment, as Figure 5As shown, the liquid metal bearing CT X-ray tube rotor monitoring system 100 of the present invention analyzes the signal data collected by various temperature sensors 121, speed sensors 122 and vibration sensors 123, and then performs self-diagnosis on faults that seriously affect the normal operation of the X-ray tube, such as the instability of the liquid metal film 114 in the rotor shaft 112 and the jamming of the rotor body 110. Among them, sudden changes in vibration amplitude will cause the liquid metal film 114 to become unstable, and opposite vibration phases will cause the rotor body 110 to jam.

[0075] Specifically, such as Figure 5 As shown, when the liquid metal bearing CT tube rotor monitoring system 100 predicts a fault, it makes a self-decision to achieve intelligent maintenance. Specifically, when it receives an abnormal vibration signal from the rotor body 110, the liquid metal bearing CT tube rotor monitoring system 100 will shut down the entire CT tube for maintenance. Additionally, when it receives an abnormal temperature signal from the rotor body 110, the liquid metal bearing CT tube rotor monitoring system 100 will adjust the cooling flow rate. Furthermore, when it receives an abnormal rotational speed of the rotor body 110, it will adjust the motor drive power of the rotor body 110.

[0076] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A liquid metal bearing CT X-ray tube rotor monitoring system, characterized in that, include: The rotor body includes a rotor shaft, a spindle, a bearing sleeve, and a liquid metal film. The bearing sleeve is fitted onto the rotor shaft, and the rotor shaft is fitted onto the spindle. The end of the bearing sleeve away from the rotor shaft is connected to the anode target disk, and the liquid metal film is disposed between the end of the spindle near the rotor shaft and the rotor shaft. A monitoring module is disposed on the outer cylindrical surface of the bearing sleeve. The monitoring module is used to monitor the state of the rotor body and collect one or more of the rotor body's temperature, rotational speed, and vibration data. A thermoelectric power generation module is disposed on the outer cylindrical surface of the bearing sleeve, and the thermoelectric power generation module is used to generate electrical energy. A power management module is disposed on the outer cylindrical surface of the bearing sleeve. The power management module is electrically connected to the thermoelectric generator module and to the monitoring module. The power management module is used to store the electrical energy generated by the thermoelectric generator module and to provide electrical energy to the monitoring module. The monitoring module, thermoelectric generator module, and power management module installed on the outer cylindrical surface of the bearing sleeve can compensate for the counterweight of the rotor body.

2. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 1, characterized in that, Multiple mounting platforms are provided on the outer cylindrical surface of the bearing sleeve. The mounting platforms are spaced apart along the circumference of the bearing sleeve and are used to install the thermoelectric power generation module.

3. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 2, characterized in that, The thermoelectric power generation module includes multiple thermoelectric power generation elements, which are spaced apart and each thermoelectric power generation element corresponds to a mounting platform. The multiple thermoelectric power generation elements are respectively installed on the corresponding mounting platforms.

4. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 3, characterized in that, Each thermoelectric generator is arranged in a strip shape, with the end of the thermoelectric generator closer to the anode target plate being designated as the hot end and the end of the thermoelectric generator farther from the anode target plate being designated as the cold end, and the temperature of the hot end being higher than the temperature of the cold end.

5. The liquid metal bearing CT tube rotor monitoring system according to claim 3, characterized in that, The thermoelectric power generation module also includes multiple heat-insulating filler blocks, which are disposed on the outer cylindrical surface of the bearing sleeve and located between every two adjacent thermoelectric power generation plates.

6. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 3, characterized in that, The power management module includes multiple power management units, each corresponding to one of the multiple thermoelectric generators. The multiple power management units are respectively disposed between every two adjacent thermoelectric generators. The power management units are used to provide power to the monitoring module.

7. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 6, characterized in that, The power management unit includes an energy harvesting chip, an energy storage element, a voltage regulator, and a circuit board. The energy harvesting chip, the energy storage element, and the voltage regulator are all mounted on the circuit board, and the circuit board is electrically connected to the monitoring module and the corresponding thermoelectric generator. The energy harvesting chip is used to harvest the electrical energy generated by the thermoelectric generator, the energy storage element is used to store the electrical energy harvested by the energy harvesting chip, and the voltage regulator is used to control the input and output voltage of the energy storage element and provide power to the monitoring module.

8. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 6, characterized in that, The monitoring module includes: A plurality of temperature sensors are respectively disposed on the outer cylindrical surface of the bearing sleeve, and each temperature sensor is disposed between two adjacent thermoelectric generators. The plurality of temperature sensors are disposed in one-to-one correspondence with the plurality of power management units, and each temperature sensor is electrically connected to the corresponding power management unit. The temperature sensors are used to monitor and collect the temperature of the rotor body. A speed sensor is provided, with multiple speed sensors respectively disposed on the outer cylindrical surface of the bearing sleeve, and each speed sensor is disposed between two adjacent thermoelectric generators. The multiple speed sensors are disposed one-to-one with multiple power management units, and each speed sensor is electrically connected to the corresponding power management unit. The speed sensor is used to monitor and collect the speed of the rotor body.

9. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 6, characterized in that, The monitoring module also includes vibration sensors. Multiple vibration sensors are respectively disposed on the outer cylindrical surface of the bearing sleeve, and each vibration sensor is disposed between two adjacent thermoelectric generators. Multiple vibration sensors are disposed in one-to-one correspondence with multiple power management units, and each vibration sensor is electrically connected to the corresponding power management unit. The vibration sensors are used to monitor and collect vibration data of the rotor body.

10. The liquid metal bearing CT X-ray tube rotor monitoring system according to claim 1, characterized in that, The monitoring module further includes a microcontroller, a data transmission unit, and a cloud platform. The microcontroller and the data transmission unit are both mounted on the outer cylindrical surface of the bearing sleeve, and are located close to the monitoring module. The microcontroller and the data transmission unit are both electrically connected to the monitoring module and the power management module. The microcontroller is used to acquire and package the temperature, rotational speed, and vibration data collected in the monitoring module. The data transmission unit is used to receive and transmit the data input by the microcontroller. The cloud platform is used to receive the data transmitted by the data transmission unit.

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