Method for improving leakage of liquid metal bearing through backflow groove structure

Abstract

The invention relates to the technical field of bearings, in particular to a method for improving liquid metal bearing leakage through a backflow groove structure. A traditional ball bearing has many problems when being used for a CT bulb tube, and although a liquid metal bearing has advantages, the problem of liquid metal leakage is faced. In order to solve the problem, the bearing comprises an inner ring mandrel, an outer ring shaft sleeve, gallium-based liquid metal and a sealing structure, and a spiral groove is formed in the inner wall of the shaft sleeve and serves as a backflow groove. The spiral groove spirally extends in the axial direction, and relevant parameters are optimally designed according to liquid metal characteristics and bearing working conditions. During working, the spiral grooves guide liquid metal to flow back, leakage is reduced, uniform distribution of the liquid metal is guaranteed, and good lubrication and heat dissipation are achieved. The bearing can improve the lubricating effect, optimize the heat dissipation performance and improve the operation stability, provides guarantee for improvement of the performance and the service life of the CT bulb tube, and has good application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a method for improving leakage of a liquid metal bearing by utilizing a reflux groove structure. Background Art

[0002] In CT equipment, the tube is one of the key components. It rotates at high speed and requires high-precision and stable operation to ensure imaging quality. Bearings, as key components that support the rotating parts of the tube, have a crucial impact on its performance. When traditional ball bearings are used in CT tubes, they often have problems such as severe wear, insufficient lubrication, and poor heat dissipation, which affect the service life of the tube and the stability and accuracy of imaging. Liquid metal bearings are gradually being used in the field of CT tubes due to their advantages such as good self-lubrication, low friction coefficient, and excellent heat dissipation performance.

[0003] In practical applications, compared with traditional ball bearings, liquid metal bearings can provide higher heat capacity and stability, as well as stable output at faster speeds, thereby improving the stability and accuracy of CT imaging, and increasing work efficiency and service life. Therefore, when using liquid metal bearings, CT tubes can well solve the performance deficiencies of ball bearings.

[0004] However, in the actual use of liquid metal bearings, the leakage of liquid metal is a problem that needs to be solved. If the leakage of liquid metal cannot be effectively reduced, it will lead to uneven lubrication, local lack of liquid, etc., causing serious friction and wear, poor heat dissipation performance, etc., which will affect the normal operation of the bearing and the overall performance of the CT tube. Summary of the invention

[0005] The purpose of the present invention is to provide a method for improving the leakage of liquid metal bearings by utilizing a reflux groove structure. The shaft sleeve is designed with a reflux groove structure to solve the problem of liquid metal leakage in existing liquid metal bearings in CT tube applications, ensuring that the liquid metal can evenly and stably participate in lubrication and heat dissipation, thereby improving the performance and service life of the bearings and CT tubes.

[0006] The liquid metal bearing for CT tube designed by the present invention comprises an inner ring core shaft, an outer ring sleeve, gallium-based liquid metal filled between the inner ring and the outer ring, and a sealing structure for bearing sealing;

[0007] The inner wall of the shaft sleeve is processed with a spiral groove structure, and the spiral groove structure constitutes a reflux groove for liquid metal.

[0008] Furthermore, the spiral groove extends spirally along the axial direction of the sleeve, with the starting end of the spiral groove close to one end of the sleeve and the ending end close to the other end of the sleeve, forming a complete channel for the liquid metal to flow;

[0009] Furthermore, the parameters of the spiral groove, such as the pitch, groove depth and groove width, can be optimized according to the physical properties of the liquid metal (such as viscosity, fluidity, etc.) and the specific size and rotation speed of the bearing and other working conditions;

[0010] Furthermore, the spiral groove structure ultimately ensures that the liquid metal can smoothly flow back from one end of the sleeve to the other end along the spiral groove under the centrifugal force and other forces generated by the operation of the bearing, thereby realizing recycling;

[0011] Furthermore, the working principle of the present invention is as follows: when the CT tube starts to work and the liquid metal bearing starts to operate, the liquid metal plays a role of lubrication and heat dissipation inside the bearing. Due to the influence of factors such as the high-speed rotation of the sleeve and centrifugal force, the liquid metal tends to disperse toward the edge of the sleeve. At this time, the spiral groove structure on the inner wall of the sleeve uses its specific spiral shape to guide the liquid metal to flow in the spiral direction. During the continuous operation of the bearing, the liquid metal dispersed in various parts of the sleeve will gradually flow from the starting end to the ending end along the spiral groove, realizing the reflux of the liquid metal, reducing the leakage of the liquid metal, and thereby ensuring that the liquid metal can be continuously and evenly distributed inside the bearing, maintaining a good lubrication and heat dissipation state.

[0012] In summary, the beneficial effects of the present invention are:

[0013] 1. Improve lubrication effect: The spiral groove structure realizes effective reflux of liquid metal, ensuring that all parts inside the bearing can be fully lubricated by liquid metal, reducing the friction coefficient, reducing wear, and extending the service life of the bearing and CT tube.

[0014] 2. Optimize heat dissipation performance: Liquid metal can better take away the heat generated by the bearing operation during the reflux process. The uniform distribution of liquid metal helps to quickly dissipate heat, avoid local overheating, and further improve the stability of CT tube operation.

[0015] 3. Improve operational stability: Ensure the stable circulation and reasonable distribution of liquid metal, so that the bearing can maintain a good working condition during high-speed rotation, reduce vibration and noise caused by uneven distribution of liquid metal, and improve the accuracy and quality of CT tube imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a cross-sectional view of the overall structure of the liquid metal bearing with a reflux groove of the present invention;

[0018] Figure 2 It is a schematic diagram of the spiral groove structure on the inner wall of the liquid metal bearing sleeve; DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a liquid metal bearing with a reflux groove structure, including a sleeve 1, a core shaft 2, a sealing ring 3, a bearing gap 4, a spiral groove 11 and a thrust plate 21. The relative position relationship between the core shaft, the sleeve and the sealing structure is clearly shown, and detailed features such as the shape and direction of the spiral groove are presented.

[0021] More specific participation Figure 1 As shown, the sleeve 1 and the mandrel 2 are made of suitable high-strength, high-hardness metal materials with good thermal stability and corrosion resistance according to design requirements. And through precise mechanical processing technology, the dimensional accuracy of the inner and outer diameters, thickness and other dimensions and the surface finish are guaranteed to meet the installation and use requirements of high-speed rotation of the CT tube.

[0022] Further, participate Figure 2 As shown, a spiral groove 11 is processed on the inner wall of the sleeve 1 by high-precision CNC processing equipment in strict accordance with the designed shape, size and radial cross-sectional shape parameters. The groove guides the liquid metal to flow back when the bearing is running to reduce leakage.

[0023] Furthermore, the shaft sleeve 1 and the core shaft 2 are assembled, and the shaft sleeve 1 and the core shaft 2 should be installed coaxially.

[0024] Furthermore, the liquid metal is injected into the gap 4 between the sleeve 1 and the core shaft 2 to ensure that the liquid metal is evenly distributed inside the bearing to prepare for subsequent lubrication and heat dissipation.

[0025] Furthermore, after the filling of the liquid metal is completed, the end surface of the thrust plate 21 is closely fitted with the end surface of the shaft sleeve 1 .

[0026] Furthermore, a sealing ring 3 is assembled on the open end side of the bearing to achieve sealing of the bearing.

[0027] Furthermore, the bearings assembled with liquid metal are installed on the corresponding rotating parts of the CT tube, and then the CT tube is debugged and tested as a whole.

[0028] Furthermore, the working condition of the bearing is monitored by monitoring equipment, and the reflux of liquid metal, temperature changes and vibration of the bearing are observed.

[0029] Furthermore, the influence of the spiral groove structure on the liquid metal reflux effect is verified based on the monitoring data, and necessary fine-tuning and optimization of the relevant parameters of the spiral groove are carried out to ensure that the bearing can operate stably and efficiently in the CT tube.

[0030] The liquid metal bearing of the present invention has a sleeve with a reflux groove structure, which effectively solves the problem of liquid metal reflux in the liquid metal bearing in the CT tube through the unique sleeve spiral groove design, provides a reliable technical guarantee for improving the performance and service life of the CT tube, and has good application prospects and promotion value.

Claims

1. A method for improving the leakage of liquid metal bearings by using a reflux groove structure, applied to CT tubes, characterized in that: It includes an inner ring core shaft, an outer ring sleeve, gallium-based liquid metal filled between the inner ring core shaft and the outer ring sleeve, and a sealing structure. The inner wall of the sleeve is processed with a spiral groove structure as a reflux groove for the liquid metal. The spiral groove extends spirally along the axial direction of the sleeve, with its starting end close to one end of the sleeve and its ending end close to the other end of the sleeve.

2. The liquid metal bearing with a reflux groove structure according to claim 1, characterized in that: The pitch, groove depth and groove width of the spiral groove are optimally designed according to the physical properties of the liquid metal and the specific size and rotation speed of the bearing.

3. The liquid metal bearing with a reflux groove structure according to claim 1, characterized in that: The inner ring core shaft and the outer ring sleeve are made of metal materials with high strength, good wear resistance and thermal stability.

4. The liquid metal bearing with a reflux groove structure according to claim 1, characterized in that: During assembly, first inject a proper amount of gallium-based liquid metal into the bearing gap between the assembled sleeve and the core shaft to evenly distribute the liquid metal, and then assemble the sealing ring on the open end side of the bearing.

5. The liquid metal bearing with a reflux groove structure according to claim 1, characterized in that: After the bearing assembled with liquid metal is installed at the corresponding rotating component position of the CT tube, the working status of the bearing is monitored by monitoring equipment, and the relevant parameters of the spiral groove are fine-tuned and optimized based on the monitoring data.

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