Bearing and machining method thereof

Abstract

The invention relates to a bearing and a machining method thereof.The bearing comprises a static assembly and a rotating assembly, the static assembly comprises a core shaft, and a protruding part is arranged on the outer wall face of the core shaft; the rotating assembly is arranged on the outer wall face of the mandrel in a sleeving mode, a gap is formed between the rotating assembly and the protruding part, and the side wall, in the axial direction of the mandrel, of the protruding part and the side wall, in the axial direction, of the rotating assembly are magnetic faces with magnetic force repellent. According to the bearing, the protruding part is provided with the two side walls distributed in the axial direction, the gaps are distributed in the two sides of the protruding part in the axial direction, and in the rotating process of the bearing, when the bearing fluctuates due to unstable rotation, the bearing force and magnetic force of the rotating assembly can be automatically adjusted through the gaps in the two sides of the protruding part in the axial direction; therefore, the stress state of the bearing can be automatically adjusted, the bearing capacity and the magnetic force of the bearing and the axial load borne by the bearing reach a balanced state, and stable operation of the bearing is kept.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a bearing and a processing method thereof. Background Art

[0002] With the rapid development of medical technology, the demand for medical X-ray tubes in medical imaging technology is also increasing. The anode target disc of the X-ray tube bears the high heat generated by electron bombardment. To avoid electron bombardment at the same target surface position, the entire anode target disc of the X-ray tube must rotate at high speed. At the same time, when the X-ray tube rotates on the CT gantry, due to eccentricity, the centrifugal force of the entire anode rotating component is borne by the anode bearing. Therefore, this requires the anode bearing to have high load-bearing capacity. In the related art, ball bearings or liquid metal bearings are selected for the anode bearing of the medical X-ray tube, but the load-bearing capacities of the existing ball bearings or liquid metal bearings are not high and are not suitable for occasions with high load-bearing requirements. Summary of the Invention

[0003] Based on this, in view of the problem of the bearing load-bearing capacity, it is necessary to provide a bearing and a processing method thereof.

[0004] A bearing, the bearing comprising:

[0005] A stationary component, including a core shaft, on the outer wall surface of which there is a protruding portion;

[0006] A rotating component, sleeved on the outer wall surface of the core shaft, and there is a gap between the rotating component and the protruding portion, and the side wall of the protruding portion along the axial direction of the core shaft and the side wall of the rotating component along the axial direction are magnetic force surfaces with repulsive magnetic forces.

[0007] In some embodiments, the gap includes a first gap and a second gap. The rotating component includes a mounting member and a rotor flange. On the end surface of the mounting member, there is a receiving groove for receiving the protruding portion. The bottom wall of the receiving groove along the axial direction is a first thrust surface, and the side wall of the protruding portion along the axial direction close to the mounting member is a second thrust surface. Both the first thrust surface and the second thrust surface are magnetic force surfaces and have repulsive magnetic forces, and the first gap is formed between the first thrust surface and the second thrust surface; the rotor flange is connected to the mounting member, and the end surface of the rotor flange along the axial direction close to the protruding portion is a third thrust surface, and the side wall of the protruding portion along the axial direction close to the rotor flange is a fourth thrust surface. Both the third thrust surface and the fourth thrust surface are magnetic force surfaces and have repulsive magnetic forces, and the second gap is formed between the third thrust surface and the fourth thrust surface.

[0008] In some embodiments, the gap includes a first gap and a second gap. The rotating component includes:

[0009] A bearing sleeve, sleeved on the core shaft, with a third gap between the bearing sleeve and the core shaft, the bearing sleeve having a first thrust surface close to one side of the protruding portion along the axial direction, the protruding portion having a second thrust surface close to one side of the bearing sleeve along the axial direction, the first thrust surface and the second thrust surface are both magnetic surfaces and magnetic forces repel each other, and the first gap is formed between the first thrust surface and the second thrust surface;

[0010] A thrust flange is sleeved on the protruding portion, one end of the thrust flange is connected to an end surface of the bearing sleeve close to the protruding portion, and a dimension of the thrust flange along the axial direction is greater than a dimension of the protruding portion along the axial direction;

[0011] A rotor flange is sleeved on the core shaft and connected to the other end face of the thrust flange, the rotor flange has a third thrust surface close to one side of the protrusion along the axial direction, the protrusion has a fourth thrust surface close to one side of the rotor flange along the axial direction, the third thrust surface and the fourth thrust surface are both magnetic surfaces and repel each other magnetically, and the second gap is formed between the third thrust surface and the fourth thrust surface.

[0012] In one of the embodiments, a size difference between the thrust flange and the protrusion along the axial direction is greater than a preset value.

[0013] In one embodiment, the rotating assembly further comprises an end cover flange, the end cover flange is sleeved on the core shaft, and a fourth gap is formed between the end cover flange and the core shaft, and the end cover flange is connected to an end surface of the bearing sleeve on a side away from the protruding portion;

[0014] A dimension of the fourth gap along a direction perpendicular to the axial direction is greater than a dimension of the third gap along a direction perpendicular to the axial direction.

[0015] In one embodiment, the size of the first gap is greater than or equal to the sum of the roughness of the first thrust surface and the roughness of the second thrust surface;

[0016] A size of the second gap is greater than or equal to a sum of a roughness of the third thrust surface and a roughness of the fourth thrust surface.

[0017] In one embodiment, a first magnetic member is disposed on a side of the rotating component close to the protruding portion, and a second magnetic member that magnetically repels the first magnetic member is disposed on a side of the protruding portion close to the shaft rotating component.

[0018] In one of the embodiments, liquid metal is also included to fill the gap.

[0019] In one embodiment, the protrusion is annular.

[0020] In one embodiment, a spiral groove is provided on the magnetic surface of the rotating assembly.

[0021] In one embodiment, the spiral groove is in a V shape, and a plurality of spiral grooves are provided.

[0022] The present application also provides a processing method for processing the above-mentioned bearing, including:

[0023] Machining a protruding portion on the outer wall surface of the mandrel of the stationary assembly;

[0024] Sleeving the rotating assembly on the outer wall surface of the mandrel, and enabling a gap to be formed between the rotating assembly and the protruding portion;

[0025] Machining the side wall of the rotating assembly along the axial direction of the mandrel and the side wall of the protruding portion along the axial direction into magnetic surfaces, and making the magnetic forces of the magnetic surfaces of the two side walls close to each other repel each other.

[0026] In one embodiment, a receiving groove for receiving the protruding portion is provided on the end surface of the mounting member, so that a first gap is formed between the first thrust surface of the receiving groove and the second thrust surface of the protruding portion, and the first thrust surface and the second thrust surface are machined into magnetic surfaces, and the magnetic forces of the first thrust surface and the second thrust surface repel each other, wherein the first thrust surface is the bottom wall of the receiving groove along the axial direction, and the second thrust surface is the side wall of the protruding portion along the axial direction close to the mounting member;

[0027] Enabling a second gap to be formed between the third thrust surface of the rotor flange and the fourth thrust surface of the protruding portion, and machining the third thrust surface and the fourth thrust surface into magnetic surfaces, and the magnetic forces of the third thrust surface and the fourth thrust surface repel each other, wherein the third thrust surface is the end surface of the rotor flange along the axial direction of the mandrel close to the protruding portion, and the fourth thrust surface is the side wall of the protruding portion along the axial direction close to the rotor flange.

[0028] In one embodiment, sleeving the bearing sleeve on the mandrel, and having a third gap between the bearing sleeve and the mandrel, machining the first thrust surface of the bearing sleeve and the second thrust surface of the protruding portion into magnetic surfaces, and the magnetic forces of the first thrust surface and the second thrust surface repel each other, and a first gap is formed between the first thrust surface and the second thrust surface, wherein the first thrust surface is the end surface of the bearing sleeve along the axial direction of the mandrel close to the protruding portion, and the second thrust surface is the side wall of the protruding portion along the axial direction close to the bearing sleeve;

[0029] The thrust flange is sleeved on the protruding portion, and one end of the thrust flange is connected to the end face of the bearing sleeve close to the protruding portion, so that the dimension of the thrust flange along the axial direction of the mandrel is larger than the dimension of the protruding portion along the axial direction;

[0030] The rotor flange is sleeved on the mandrel and connected to the other end of the thrust flange. The third thrust surface of the rotor flange and the fourth thrust surface of the protruding portion are processed into magnetic surfaces, and the magnetic forces of the third thrust surface and the fourth thrust surface repel each other. A second gap is formed between the third thrust surface and the fourth thrust surface. Among them, the third thrust surface is the end face of the rotor flange close to the protruding portion along the axial direction, and the fourth thrust surface is the side wall of the protruding portion close to the rotor flange along the axial direction.

[0031] In one embodiment, spiral grooves are processed on the first thrust surface and the third thrust surface.

[0032] In one embodiment, the first thrust surface, the second thrust surface, the third thrust surface and the fourth thrust surface are plated to process the first thrust surface, the second thrust surface, the third thrust surface and the fourth thrust surface into magnetic surfaces.

[0033] In one embodiment, the method of processing the side wall of the rotating assembly close to the gap side and the side wall of the protruding portion into magnetic surfaces includes:

[0034] Install a first magnetic member on the side wall of the rotating assembly along the axial direction;

[0035] Install a second magnetic member on the side wall of the protruding portion along the axial direction, which is magnetically repulsive to the first magnetic member.

[0036] For the above bearing, a protruding portion is provided on the outer wall surface of the mandrel of the stationary assembly. The rotating assembly is sleeved on the outer wall surface of the mandrel, and there is a gap between the rotating assembly and the protruding portion. The side wall of the protruding portion along the axial direction of the mandrel and the side wall of the rotating assembly along the axial direction, that is, the two side walls on both sides of the gap are magnetic surfaces with magnetic repulsion. The protruding portion has two side walls distributed along the axial direction, so gaps are distributed on both sides of the protruding portion along the axial direction. During the rotation of the bearing, when the bearing fluctuates due to unstable rotation, the gaps on both sides of the protruding portion along the axial direction can be used to automatically adjust the bearing capacity and magnetic force of the rotating assembly, so as to automatically adjust the stress state of the bearing, and make the bearing capacity, magnetic force and axial load received by the bearing reach a balanced state, and maintain the stable operation of the bearing. Description of the Drawings

[0037] Figure 1 It is a cross-sectional view of the bearing provided in the first embodiment of the present application.

[0038] Figure 2 A cross-sectional view of the bearing provided in the second embodiment of the present application.

[0039] Figure 3 A schematic structural diagram of the first gap and the second gap provided in the second embodiment of the present application having equal dimensions.

[0040] Figure 4 A schematic structural diagram of the first gap and the second gap provided in the second embodiment of the present application having unequal dimensions.

[0041] Figure 5 A schematic structural diagram of a spiral groove provided on the first thrust surface in the embodiment of the present application.

[0042] Figure 6 is Figure 5 A partial enlarged view at A.

[0043] In the figure:

[0044] 100, mandrel; 110, protruding part; 120, first gap; 130, second gap;

[0045] 200, thrust flange;

[0046] 300, bearing sleeve; 310, first thrust surface;

[0047] 400, rotor flange;

[0048] 500, end cover flange;

[0049] 600, spiral groove;

[0050] 700, mounting part. Detailed implementation manners

[0051] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0053] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In the present application, unless otherwise clearly specified and limited, if there are terms such as "mounted", "connected", "connected to", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0055] In the present application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0056] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0057] This application provides a bearing, such as Figures 1 to 6 As shown, the bearing includes a stationary component and a rotating component. The stationary component includes a mandrel 100 which has an outer wall surface. The rotating component is sleeved on the outer wall surface of the mandrel 100. The rotating component has an inner wall surface. There is a gap between the inner wall surface of the rotating component and the outer wall surface of the mandrel 100. At least a part of the inner wall surface of the rotating component opposite to the outer wall surface of the mandrel 100 is a magnetic repulsive magnetic surface.

[0058] For the above bearing, the rotating component is sleeved on the mandrel of the stationary component, and there is a gap between the inner wall surface of the rotating component and the outer wall surface of the mandrel 100. At least a part of the area where the inner wall surface of the rotating component and the outer wall surface of the mandrel 100 are opposite is a magnetic repulsive magnetic surface, so that the gap between the rotating component and the mandrel 100 is always maintained. During the rotation of the bearing, when there are fluctuations caused by the unstable rotation of the bearing, the gap between the rotating component and the mandrel 100 can be utilized to automatically adjust the bearing capacity and magnetic force of the rotating component, so as to automatically adjust the stress state of the bearing, and make the bearing capacity, magnetic force and the axial load received by the bearing reach a balanced state, maintaining the stable operation of the bearing.

[0059] In some embodiments, such as Figures 1 to 6 As shown, the stationary component includes a mandrel 100, and a protrusion 110 is provided on the outer wall surface of the mandrel 100. The rotating component is sleeved on the outer wall surface of the mandrel 100, and there is a gap between the rotating component and the protrusion 110. The side wall of the protrusion 110 along the axial direction of the mandrel 100 and the side wall of the rotating component along the axial direction are magnetic repulsive magnetic surfaces.

[0060] In the above-mentioned bearing, a protruding portion 110 is provided on the outer wall surface of the mandrel 100 of the stationary component. The rotating component is sleeved on the mandrel 100, and there is a gap between the rotating component and the protruding portion 110. The side wall of the protruding portion 110 along the axial direction of the mandrel 100 and the side wall of the rotating component along the axial direction, that is, the two side walls on both sides of the gap are magnetic repulsive magnetic surfaces. The protruding portion 110 has two side walls distributed along the axial direction, so gaps are distributed on both sides of the protruding portion 110 along the axial direction. During the rotation of the bearing, when the bearing fluctuates due to unstable rotation, the gaps on both sides of the protruding portion 110 along the axial direction can be used to automatically adjust the bearing capacity and magnetic force of the rotating component, so as to automatically adjust the stress state of the bearing, make the bearing capacity, magnetic force and axial load received by the bearing reach a balanced state, and maintain the stable operation of the bearing.

[0061] In some embodiments, such as Figure 1 and Figure 2 shown, the protruding portion 110 is annular. The protruding portion 110 is set as an annular structure, that is, the protruding portion 110 is arranged around the circumference of the mandrel 100 for one week.

[0062] Specifically, the protruding portion 110 and the mandrel 100 are integrally formed.

[0063] In some embodiments, such as Figure 1 shown, the gap includes a first gap and a second gap. The rotating component includes a mounting member 700 and a rotor flange 400. A receiving groove for receiving the protruding portion 110 is provided on the end surface of the mounting member 700. The bottom wall of the receiving groove along the axial direction is a first thrust surface 310. The side wall of the protruding portion 110 along the axial direction close to the mounting member 700 is a second thrust surface. Both the first thrust surface 310 and the second thrust surface are magnetic surfaces and magnetic repulsive, and a first gap is formed between the first thrust surface 310 and the second thrust surface;

[0064] The rotor flange 400 is connected to the mounting member 700. The end surface of the rotor flange 400 along the axial direction close to the protruding portion 110 is a third thrust surface. The side wall of the protruding portion 110 along the axial direction close to the rotor flange 400 is a fourth thrust surface. Both the third thrust surface and the fourth thrust surface are magnetic surfaces and magnetic repulsive, and a second gap is formed between the third thrust surface and the fourth thrust surface.

[0065] A first gap 120 is formed between the mounting member 700 and the protrusion 110. By providing the first thrust surface 310 and the second thrust surface, the magnetic forces of the first thrust surface 310 and the second thrust surface repel each other, so that a first gap is always maintained between the mounting member 700 and the protrusion 110, facilitating the separation of the mounting member 700 and the protrusion 110. A second gap is formed between the rotor flange 400 and the protrusion 110. By providing the third thrust surface and the fourth thrust surface, the magnetic forces of the third thrust surface and the fourth thrust surface repel each other, so that a second gap is always maintained between the rotor flange 400 and the protrusion 110, facilitating the separation of the rotor flange 400 and the protrusion 110. Moreover, since the first gap and the second gap are respectively provided on both axial sides of the protrusion 110, when the bearing is affected by external force fluctuations, the bearing capacity is automatically adjusted by the first gap and the second gap on both axial sides of the protrusion 110.

[0066] In some embodiments, as Figures 2 to 4 shown, the gap includes a first gap 120 and a second gap 130. The rotating assembly includes a bearing sleeve 300, a thrust flange 200, and a rotor flange 400. The bearing sleeve 300 is sleeved on the core shaft 100 and has a third gap therebetween. The bearing sleeve 300 has a first thrust surface 310 on one side close to the protrusion 110 in the axial direction. The protrusion 110 has a second thrust surface on one side close to the bearing sleeve 300 in the axial direction. Both the first thrust surface 310 and the second thrust surface are magnetic surfaces and the magnetic forces repel each other, and a first gap 120 is formed between the first thrust surface 310 and the second thrust surface;

[0067] The thrust flange 200 is sleeved on the protrusion 110. One end of the thrust flange 200 is connected to the end face of the bearing sleeve 300 close to the protrusion 110, and the dimension of the thrust flange 200 in the axial direction is greater than the dimension of the protrusion 110 in the axial direction;

[0068] The rotor flange 400 is sleeved on the core shaft 100 and is connected to the other end face of the thrust flange 200. The rotor flange 400 has a third thrust surface on one side close to the protrusion 110 in the axial direction. The protrusion 110 has a fourth thrust surface on one side close to the rotor flange 400 in the axial direction. Both the third thrust surface and the fourth thrust surface are magnetic surfaces and the magnetic forces repel each other, and a second gap 130 is formed between the third thrust surface and the fourth thrust surface.

[0069] By setting the axial dimension of the thrust flange 200 to be greater than the axial dimension of the protruding portion 110, and connecting the bearing sleeve 300 to the rotor flange 400 through the thrust flange 200, a first gap 120 and a second gap 130 are respectively formed on both sides of the protruding portion 110 along the axial direction. By setting the first thrust surface 310 and the second thrust surface that repel each other magnetically, and the third thrust surface and the fourth thrust surface that repel each other magnetically, the first gap 120 and the second gap 130 can always be maintained on both sides of the protruding portion 110 along the axial direction. When the bearing is affected by external force fluctuations, the bearing capacity of the bearing is automatically adjusted by using the first gap 120 and the second gap 130 on both sides of the protruding portion 110 along the axial direction.

[0070] In some embodiments, such as Figure 5 and Figure 6 As shown, a spiral groove 600 is provided on the magnetic force surface of the rotating assembly. By providing the spiral groove 600 on the magnetic force surface of the rotating assembly, that is, by providing the spiral groove 600 on the first thrust surface 310 and the third thrust surface of the rotating assembly, the spiral groove 600 generates fluid force by using the wedge effect during the rotation of the rotating assembly, thereby improving the bearing capacity of the bearing.

[0071] It can be understood that by providing the spiral groove 600 on the magnetic force surface of the rotating assembly, that is, in Figure 1 In the provided embodiment, it means that the spiral groove 600 is provided on the first thrust surface 310 of the mounting member 700 and the third thrust surface of the rotor flange 400. In Figure 2 In the provided embodiment, it means that the spiral groove 600 is provided on the first thrust surface 310 of the bearing sleeve 300 and the third thrust surface of the rotor flange 400.

[0072] It can be understood that the parameters of the spiral groove 600, such as groove depth, groove angle, number of grooves or groove width, etc., will affect the bearing capacity. The parameters of the spiral groove 600, such as groove depth, groove angle, number of grooves or groove width, etc., are not limited here and are specifically determined according to actual operation needs.

[0073] In a specific embodiment, such as Figure 5 and Figure 6 As shown, the spiral groove 600 is in a V shape, and a plurality of spiral grooves 600 are provided. The spiral groove 600 includes a tip and a recess. By providing a plurality of spiral grooves 600, in two adjacent spiral grooves 600, the tip of one spiral groove 600 extends into the recess of the other spiral groove 600.

[0074] In the above embodiment, when the bearing is subjected to an external force F in the axial direction from the mounting member 700 / bearing sleeve 300 to the rotor flange 400 (horizontally to the right), the bearing capacity between the first thrust surface 310 and the second thrust surface is F1, and the bearing capacity between the third thrust surface and the fourth thrust surface is F2. The magnetic force between the first thrust surface 310 and the second thrust surface is C1, and the magnetic force between the third thrust surface and the fourth thrust surface is C2. Among them, the magnitude of F1 is negatively correlated with the first gap 120, the magnitude of F2 is negatively correlated with the second gap 130, the magnitude of C1 is also negatively correlated with the first gap 120, and the magnitude of C2 is also negatively correlated with the second gap 130. When the bearing operates stably, it must satisfy F1 + C1 - F2 - C2 = F, where F is the total axial load. At this time, the first gap 120 < the second gap 130.

[0075] From the above relationships, it can be seen that when the axial load borne by the bearing increases, the first gap 120 becomes smaller and the second gap 130 becomes larger. Correspondingly, both F1 and C1 increase, while both F2 and C2 decrease. At this time, F1 + C1 - F2 - C2 = F + △F, where △F is the increase in the axial load. On the contrary, when the axial load borne by the bearing decreases, the first gap 120 becomes larger and the second gap 130 becomes smaller. Correspondingly, both F1 and C1 decrease, while both F2 and C2 increase. At this time, F1 + C1 - F2 - C2 = F - △F, where △F is the decrease in the axial load. Therefore, when the axial load borne by the bearing changes, the first gap 120 and the second gap 130 on both axial sides of the protrusion 110 can be automatically adjusted, that is, the bearing capacities F1 and F2 and the magnetic forces C1 and C2 of the bearing can be automatically adjusted, so as to be able to automatically adjust the stress state of the bearing, make the bearing capacity and magnetic force of the bearing reach a balanced state with the axial load borne by the bearing, and maintain the stable operation of the bearing.

[0076] It should be noted that the magnetic force C1 between the first thrust surface 310 and the second thrust surface, and the magnetic force C2 between the third thrust surface and the fourth thrust surface have a functional relationship with the magnetization intensity B and the first gap 120, and generally can be expressed as: C1 = f(B, h0); among them, the magnetization intensity B is positively correlated with the magnetization depth H, that is, the greater the magnetization depth, the greater the magnetization intensity B. Generally, in order to ensure the magnitude of the magnetic force, it is necessary to ensure the magnetization intensity, and thus it is necessary to ensure the magnetization depth. Generally, the magnetization depth should be greater than the groove depth of the thrust surface; generally, the magnetization depths on both left and right sides of the bearing are kept the same, that is, the magnetization intensity B is the same. When the bearing is subjected to a force to the right (such as Figure 1 and Figure 2When there is an axial load on the right side (as shown), the first gap 120 on the left side decreases, and the second gap 130 on the right side increases. If the magnetization intensities on both the left and right sides are the same, the magnetic forces generated on both sides are only related to the first gap 120 and the second gap 130. According to the corresponding relationship, the magnetic force C1 on the left side > C2. The magnetic force difference between the two sides can balance and offset the axial load of the bearing to the right; vice versa, the same principle applies.

[0077] It should be noted that the bearing capacity between the first thrust surface 310 and the second thrust surface is F1. The bearing capacity of F1 refers to the force provided by the spiral groove 600 on the first thrust surface 310. The bearing capacity between the third thrust surface and the fourth thrust surface is F2. The bearing capacity of F2 refers to the force provided by the spiral groove 600 on the third thrust surface.

[0078] In some embodiments, the size of the gap is greater than or equal to the sum of the roughness of the inner wall surface of the rotating assembly and the roughness of the outer wall surface of the mandrel 100. By defining the size of the gap, contact friction between the rotating assembly and the mandrel 100 is prevented.

[0079] Specifically, the gap includes a first gap 120 and a second gap 130. The size of the first gap 120 is greater than or equal to the sum of the roughness of the first thrust surface 310 and the roughness of the second thrust surface; the size of the second gap 130 is greater than or equal to the sum of the roughness of the third thrust surface and the roughness of the fourth thrust surface. By defining the minimum value of the first gap 120 and the minimum value of the second gap 130, contact friction between the mounting member 700 / bearing sleeve 300 and the protrusion 110 is prevented, and contact friction between the rotor flange 400 and the protrusion 110 is prevented.

[0080] In the second embodiment, the axial dimension difference between the thrust flange 200 and the protrusion 110 is greater than a preset value. By defining the axial dimensions of the thrust flange 200 and the protrusion 110, contact friction between the bearing sleeve 300 and the rotor flange 400 and the protrusion 110 is prevented.

[0081] More specifically, the preset value is 0.04 mm. That is, the axial dimension difference between the thrust flange 200 and the protrusion 110 is greater than 0.04 mm. For example, the axial dimension difference between the thrust flange 200 and the protrusion 110 can be 0.05 mm, 0.06 mm, or 0.07 mm.

[0082] It should be noted that there is a third gap between the bearing sleeve 300 and the mandrel 100, that is, there is a third gap between the outer wall surfaces of the bearing sleeve 300 and the mandrel 100.

[0083] In some embodiments, the bearing further includes liquid metal filled in the gap. The third gap is filled with liquid metal, and other lubricating media such as oil may also be added, but the liquid metal has a lower viscosity, which can make the bearing rotate or move more flexibly and smoothly; and the liquid metal has good thermal conductivity, which can quickly transfer the heat generated in the bearing to avoid overheating of the bearing.

[0084] In some embodiments, Figure 2 As shown, the rotating assembly further includes an end cover flange 500, which is sleeved on the core shaft 100 and has a fourth gap between the end cover flange 500 and the core shaft 100, and the end cover flange 500 is connected to the end surface of the bearing sleeve 300 on the side away from the protrusion 110; the dimension of the fourth gap along the perpendicular direction to the axial direction is greater than the dimension of the third gap along the perpendicular direction to the axial direction. The end cover flange 500 is provided and connected to the bearing sleeve 300 to prevent leakage of liquid metal inside the bearing.

[0085] In some embodiments, a first magnetic member is disposed on the inner wall of the rotating assembly, and a second magnetic member that magnetically repels the first magnetic member is disposed on the outer wall of the core shaft 100. By providing the first magnetic member and the second magnetic member, at least a portion of the inner wall of the rotating assembly that is opposite to the outer wall of the core shaft 100 is a magnetic surface that magnetically repels each other.

[0086] In a specific embodiment, a first magnetic member is provided on one side of the rotating component close to the protruding portion 110, and a second magnetic member that magnetically repels the first magnetic member is provided on one side of the protruding portion 110 close to the shaft rotating component. By providing the first magnetic member and the second magnetic member that magnetically repel each other, a repelling magnetic surface is formed between the rotating component and the protruding portion 110.

[0087] More specifically, two groups of first magnetic members and second magnetic members are provided, and the first magnetic member and the second magnetic member that magnetically repel each other are respectively provided on the first thrust surface 310 of the mounting member 700 / bearing sleeve 300 and the second thrust surface of the protrusion 110, and the first magnetic member and the second magnetic member that magnetically repel each other are respectively provided on the third thrust surface of the rotor flange 400 and the fourth thrust surface of the protrusion 110.

[0088] More specifically, the first magnetic member and the second magnetic member may be made of FeCrCo or FeCrMo material.

[0089] In other embodiments, the magnetic surface may be generated by a plating method.

[0090] The present application also provides a processing method for processing the above-mentioned bearing, comprising:

[0091] A protrusion 110 is machined on the outer wall surface of the mandrel 100 of the stationary component;

[0092] The rotating assembly is sleeved on the outer wall surface of the mandrel 100, and a gap is provided between the rotating assembly and the protruding portion 110;

[0093] The side wall of the rotating assembly along the axial direction of the mandrel 100 and the side wall of the protruding portion 110 along the axial direction are processed into magnetic surfaces, and the magnetic forces of the two magnetic surfaces close to each other repel each other.

[0094] In the processing method of the bearing provided by the present application, the rotating assembly is sleeved on the outer wall surface of the mandrel 100, and a gap is provided between the rotating assembly and the protruding portion 110. The side walls of the protruding portion 110 distributed along the axial direction of the mandrel 100 and the side walls of the rotating assembly along the axial direction are both processed into magnetic surfaces, and the magnetic forces of the two magnetic surfaces close to each other repel each other, that is, the two side walls on both sides of the gap are magnetic surfaces with repulsive magnetic forces. During the rotation of the bearing, when the bearing fluctuates due to unstable rotation, the bearing capacity and magnetic force of the rotating assembly can be automatically adjusted by using the gaps on both sides of the protruding portion 110 along the axial direction, so that the force-bearing state of the bearing can be automatically adjusted, and the bearing capacity, magnetic force of the bearing and the axial load received by the bearing reach a balanced state, maintaining the stable operation of the bearing.

[0095] In some embodiments, as Figure 1 shown, a receiving groove for receiving the protruding portion 110 is provided on the end surface of the mounting member 700, a first gap is formed between the first thrust surface of the receiving groove and the second thrust surface of the protruding portion 110, the first thrust surface and the second thrust surface are processed into magnetic surfaces, and the magnetic forces of the first thrust surface 310 and the second thrust surface repel each other. Among them, the first thrust surface is the bottom wall of the receiving groove along the axial direction of the mandrel 100, and the second thrust surface is the side wall of the protruding portion 110 along the axial direction close to the mounting member 700;

[0096] A second gap is formed between the third thrust surface of the rotor flange 400 and the fourth thrust surface of the protruding portion 110, the third thrust surface and the fourth thrust surface are processed into magnetic surfaces, and the magnetic forces of the third thrust surface and the fourth thrust surface repel each other. Among them, the third thrust surface is the end surface of the rotor flange 400 along the axial direction close to the protruding portion 110, and the fourth thrust surface is the side wall of the protruding portion 110 along the axial direction close to the rotor flange 400.

[0097] A first gap is formed between the mounting member 700 and the protruding portion 110, a second gap is formed between the rotor flange 400 and the protruding portion 110, the magnetic forces of the first thrust surface 310 and the second thrust surface repel each other, so that a first gap is always maintained between the mounting member 700 and the protruding portion 110, the magnetic forces of the third thrust surface and the fourth thrust surface repel each other, so that a second gap is always maintained between the rotor flange 400 and the protruding portion 110. When the bearing fluctuates under the action of external force, the bearing capacity of the bearing can be automatically adjusted by using the first gap and the second gap on both sides of the protruding portion 110 along the axial direction.

[0098] In some embodiments, as Figure 2 shown, a bearing sleeve 300 is sleeved on a mandrel 100, and there is a third gap between the bearing sleeve 300 and the mandrel 100. The first thrust surface 310 of the bearing sleeve 300 and the second thrust surface of the protruding portion 110 are processed into magnetic surfaces, and the magnetic forces of the first thrust surface 310 and the second thrust surface repel each other. A first gap 120 is formed between the first thrust surface 310 and the second thrust surface. Among them, the first thrust surface 310 is the end surface of the bearing sleeve 300 on the side close to the protruding portion 110 along the axial direction of the mandrel 100, and the second thrust surface is the side wall of the protruding portion 110 on the side close to the bearing sleeve 300 along the axial direction;

[0099] A thrust flange 200 is sleeved on the protruding portion 110, and one end of the thrust flange 200 is connected to the end surface of the bearing sleeve 300 on the side close to the protruding portion 110, so that the dimension of the thrust flange 200 along the axial direction of the mandrel 100 is greater than the dimension of the protruding portion 110 along the axial direction;

[0100] A rotor flange 400 is sleeved on the mandrel 100 and is connected to the other end of the thrust flange 200. The third thrust surface of the rotor flange 400 and the fourth thrust surface of the protruding portion 110 are processed into magnetic surfaces, and the magnetic forces of the third thrust surface and the fourth thrust surface repel each other. A second gap 130 is formed between the third thrust surface and the fourth thrust surface. Among them, the third thrust surface is the end surface of the rotor flange 400 on the side close to the protruding portion 110 along the axial direction, and the fourth thrust surface is the side wall of the protruding portion 110 on the side close to the rotor flange 400 along the axial direction.

[0101] By making the dimension of the thrust flange 200 along the axial direction greater than the dimension of the protruding portion 110 along the axial direction, and the bearing sleeve 300 is connected to the rotor flange 400 through the thrust flange 200, so that the first gap 120 and the second gap 130 are formed on both sides of the protruding portion 110 along the axial direction. By setting the first thrust surface 310 and the second thrust surface with repulsive magnetic forces, and the third thrust surface and the fourth thrust surface with repulsive magnetic forces, the first gap 120 and the second gap 130 can be always maintained on both sides of the protruding portion 110 along the axial direction. When the bearing is affected by external force fluctuations, the bearing capacity of the bearing can be automatically adjusted by using the first gap 120 and the second gap 130 on both sides of the protruding portion 110 along the axial direction.

[0102] In some embodiments, spiral grooves 600 are processed on the first thrust surface 310 and the third thrust surface. By processing the spiral grooves 600 on the first thrust surface 310 and the third thrust surface, the spiral grooves 600 generate fluid forces by using the wedge effect during the rotation of the first thrust surface 310 and the third thrust surface, thereby improving the bearing capacity of the bearing.

[0103] In some embodiments, the directions for machining the side walls of the rotating component close to the gap and the side walls of the protruding portion 110 into magnetic surfaces include: plating the first thrust surface 310, the second thrust surface, the third thrust surface, and the fourth thrust surface to machine the first thrust surface 310, the second thrust surface, the third thrust surface, and the fourth thrust surface into magnetic surfaces. Through the plating process, the first thrust surface 310, the second thrust surface, the third thrust surface, and the fourth thrust surface are magnetized to form magnetic surfaces.

[0104] In some embodiments, the directions for machining the side walls of the rotating component close to the gap and the side walls of the protruding portion 110 into magnetic surfaces include: installing a first magnetic member on the side wall of the rotating component along the axial direction, and installing a second magnetic member on the side wall of the protruding portion 110 along the axial direction, with the magnetic force of the second magnetic member repelling that of the first magnetic member. By respectively installing the first magnetic member and the second magnetic member with mutually repulsive magnetic forces on the side wall of the rotating component and the side wall of the protruding portion 110, the first thrust surface 310 and the second thrust surface, as well as the third thrust surface and the fourth thrust surface, can also be machined into magnetic surfaces with mutually repulsive magnetic forces.

[0105] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity in description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0106] The above-described embodiments merely represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A bearing, characterized in that, The bearing includes: A stationary component, including a mandrel (100), on the outer wall surface of which there is a protruding portion (110); A rotating component, sleeved on the outer wall surface of the mandrel (100), and there is a gap between the rotating component and the protruding portion (110). The side wall of the protruding portion (110) along the axial direction of the mandrel (100) and the side wall of the rotating component along the axial direction are magnetic force surfaces with repulsive magnetic force.

2. The bearing according to claim 1, characterized in that, The gap includes a first gap (120) and a second gap (130). The rotating component includes: A mounting member (700), on the end face of which there is a receiving groove for receiving the protruding portion (110). The bottom wall of the receiving groove along the axial direction is a first thrust surface (310). The side wall of the protruding portion (110) along the axial direction close to the mounting member (700) is a second thrust surface. Both the first thrust surface (310) and the second thrust surface are magnetic force surfaces with repulsive magnetic force, and the first gap (120) is formed between the first thrust surface (310) and the second thrust surface; A rotor flange (400), connected to the mounting member (700). The end face of the rotor flange (400) along the axial direction close to the protruding portion (110) is a third thrust surface. The side wall of the protruding portion (110) along the axial direction close to the rotor flange (400) is a fourth thrust surface. Both the third thrust surface and the fourth thrust surface are magnetic force surfaces with repulsive magnetic force, and the second gap (130) is formed between the third thrust surface and the fourth thrust surface.

3. The bearing according to claim 1, characterized in that, The gap includes a first gap (120) and a second gap (130). The rotating component includes: A bearing sleeve (300), sleeved on the mandrel (100), and there is a third gap between the bearing sleeve (300) and the mandrel (100). The bearing sleeve (300) has a first thrust surface (310) along the axial direction close to the protruding portion (110). The protruding portion (110) has a second thrust surface along the axial direction close to the bearing sleeve (300). Both the first thrust surface (310) and the second thrust surface are magnetic force surfaces with repulsive magnetic force, and the first gap (120) is formed between the first thrust surface (310) and the second thrust surface; A thrust flange (200), sleeved on the protruding portion (110). One end of the thrust flange (200) is connected to the end face of the bearing sleeve (300) close to the protruding portion (110), and the dimension of the thrust flange (200) along the axial direction is larger than the dimension of the protruding portion (110) along the axial direction. A rotor flange (400) is sleeved on the core shaft (100) and connected to the other end surface of the thrust flange (200). The rotor flange (400) has a third thrust surface close to the protruding portion (110) along the axial direction. The protruding portion (110) has a fourth thrust surface close to the rotor flange (400) along the axial direction. Both the third thrust surface and the fourth thrust surface are magnetic surfaces and repel each other magnetically. The second gap (130) is formed between the third thrust surface and the fourth thrust surface.

4. The bearing according to claim 3, characterized in that, A size difference between the thrust flange (200) and the protruding portion (110) along the axial direction is greater than a preset value.

5. The bearing according to claim 3, characterized in that, The rotating assembly further comprises an end cover flange (500), the end cover flange (500) being sleeved on the core shaft (100) and having a fourth gap between the end cover flange (500) and the core shaft (100), and the end cover flange (500) being connected to an end surface of the bearing sleeve (300) on a side facing away from the protruding portion (110); A dimension of the fourth gap along a direction perpendicular to the axial direction is greater than a dimension of the third gap along a direction perpendicular to the axial direction.

6. The bearing according to claim 2 or 3, characterized in that, The size of the first gap (120) is greater than or equal to the sum of the roughness of the first thrust surface (310) and the roughness of the second thrust surface; The size of the second gap (130) is greater than or equal to the sum of the roughness of the third thrust surface and the roughness of the fourth thrust surface.

7. The bearing according to claim 1, characterized in that A first magnetic member is provided on a side of the rotating component close to the protruding portion (110), and a second magnetic member that magnetically repels the first magnetic member is provided on a side of the protruding portion (110) close to the shaft rotating component.

8. The bearing according to claim 1, characterized in that, Also included is liquid metal filled in the gap.

9. The bearing according to claim 1, wherein, The protrusion (110) is annular.

10. The bearing according to claim 1, characterized in that, A spiral groove (600) is arranged on the magnetic surface of the rotating component.

11. The bearing according to claim 10, characterized in that, The spiral groove (600) is V-shaped, and a plurality of the spiral grooves (600) are provided.

12. A processing method for processing the bearing according to any one of claims 1-11, characterized in that, include: Processing a protrusion (110) on the outer wall surface of the mandrel (100) of the stationary component; The rotating component is sleeved on the outer wall surface of the core shaft (100), and a gap is provided between the rotating component and the protruding portion (110); The axial side wall of the rotating component and the axial side wall of the protruding portion are processed into magnetic surfaces, and the magnetic forces of the two magnetic surfaces close to each other are made to repel each other.

13. The machining method of the bearing according to claim 12, characterized in that, A receiving groove for receiving the protrusion (110) is provided on the end surface of the mounting member (700), so that a first gap (120) is formed between a first thrust surface (310) of the receiving groove and a second thrust surface of the protrusion (110), the first thrust surface (310) and the second thrust surface are processed into magnetic surfaces, and the magnetic forces of the first thrust surface (310) and the second thrust surface repel each other, wherein the first thrust surface (310) is the bottom wall of the receiving groove along the axial direction of the core shaft (100), and the second thrust surface is the side wall of the protrusion (110) along the axial direction close to the mounting member (700); A second gap (130) is formed between the third thrust surface of the rotor flange (400) and the fourth thrust surface of the protruding portion (110). The third thrust surface and the fourth thrust surface are machined into magnetic surfaces, and the magnetic forces of the third thrust surface and the fourth thrust surface repel each other. Herein, the third thrust surface is the end face of the rotor flange (400) on the side close to the protruding portion (110) along the axial direction, and the fourth thrust surface is the side wall of the protruding portion (110) on the side close to the rotor flange (400) along the axial direction.

14. The machining method of the bearing according to claim 12, wherein The bearing sleeve (300) is sleeved on the mandrel (100), and there is a third gap between the bearing sleeve (300) and the mandrel (100). The first thrust surface (310) of the bearing sleeve (300) and the second thrust surface of the protruding portion (110) are machined into magnetic surfaces, and the magnetic forces of the first thrust surface (310) and the second thrust surface repel each other. A first gap (120) is formed between the first thrust surface (310) and the second thrust surface. Herein, the first thrust surface (310) is the end face of the bearing sleeve (300) on the side close to the protruding portion (110) along the axial direction of the mandrel (100), and the second thrust surface is the side wall of the protruding portion (110) on the side close to the bearing sleeve (300) along the axial direction; The thrust flange (200) is sleeved on the protruding portion (110), and one end of the thrust flange (200) is connected to the end face of the bearing sleeve (300) on the side close to the protruding portion (110), so that the dimension of the thrust flange (200) along the axial direction of the mandrel (100) is greater than the dimension of the protruding portion (110) along the axial direction; The rotor flange (400) is sleeved on the mandrel (100) and connected to the other end of the thrust flange (200). The third thrust surface of the rotor flange (400) and the fourth thrust surface of the protruding portion (110) are machined into magnetic surfaces, and the magnetic forces of the third thrust surface and the fourth thrust surface repel each other. A second gap (130) is formed between the third thrust surface and the fourth thrust surface. Herein, the third thrust surface is the end face of the rotor flange (400) on the side close to the protruding portion (110) along the axial direction, and the fourth thrust surface is the side wall of the protruding portion (110) on the side close to the rotor flange (400) along the axial direction.

15. The processing method of the bearing according to claim 13 or 14, characterized in that, Spiral grooves (600) are machined on the first thrust surface (310) and the third thrust surface.

16. The machining method of the bearing according to claim 13 or 14, characterized in that, The first thrust surface (310), the second thrust surface, the third thrust surface, and the fourth thrust surface are plated to machine the first thrust surface (310), the second thrust surface, the third thrust surface, and the fourth thrust surface into magnetic surfaces.

17. The processing method of the bearing according to claim 12, characterized in that, The method for machining the side walls of the rotating assembly on the side close to the gap and the side wall of the protruding portion (110) into magnetic surfaces includes: A first magnetic member is mounted on the side wall of the rotating assembly along the axial direction; A second magnetic member with a repulsive magnetic force to the first magnetic member is mounted on the side wall of the protruding portion (110) along the axial direction.

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