CN115036200A

CN115036200A - Liquid metal dynamic pressure sliding bearing, groove coating manufacturing method and X-ray tube

Info

Publication number: CN115036200A
Application number: CN202210580147.7A
Authority: CN
Inventors: 胡银富
Original assignee: Beijing Zhishu Technology Co ltd
Current assignee: Beijing Zhishu Technology Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-09
Anticipated expiration: 2042-05-25
Also published as: CN115036200B

Abstract

The application discloses a liquid metal dynamic pressure sliding bearing, a method for manufacturing a groove coating, and an X-ray tube. Among them, a sliding bearing includes: a bearing core, a rotating casing disposed outside the bearing core, and a liquid metal material disposed between the bearing core and the rotating casing, wherein the rotating casing can rotate around the bearing core, and the rotating casing At least a part of the surface opposite to the bearing core and/or at least a part of the surface of the bearing core opposite to the rotating casing is provided with a plurality of grooves, and wherein the edge surfaces of the grooves are provided with a wear-resistant coating composed of wear-resistant materials, And the bottom surface and/or the side surface of the trench is provided with a first wetting coating composed of a wettable material.

Description

Liquid metal dynamic pressure sliding bearing, groove coating manufacturing method and X-ray tube

Technical Field

The application relates to the technical field of X-ray tubes, in particular to a liquid metal dynamic pressure sliding bearing, a groove coating manufacturing method and an X-ray tube.

Background

In recent years, with the development of modern medical imaging technology and the increase of medical diagnosis requirements, higher requirements are made on the performance and service life of a sliding bearing of an X-ray tube. The sliding lubrication bearing for the rotating anode X-ray tube has the characteristics of wettability of a friction surface and a lubrication medium, and wear resistance between the friction surfaces, plays an important role in the overall performance of the bearing, and directly influences the working performance and the service life of the tube.

In the prior art, there are several methods for improving the performance of sliding bearings. For example, method 1: the metal surface is plated with gold, so that the affinity between the liquid metal and the metal surface is improved, and finally the wetting property of the liquid metal and the metal surface is improved.

The method 2 comprises the following steps: by plating some carbides, borides or nitrides of transition metal elements on the bearing surface by PVD, the wetting characteristics between the bearing surface and the lubricating medium are made better.

The method 3 comprises the following steps: the sliding surface of the bearing is plated with wear-resistant materials such as tetrahedral amorphous carbon, molybdenum disulfide, diamond, polycrystalline diamond and the like, so that a lower sliding friction coefficient and higher wear resistance are obtained.

With methods 1 and 2, only good wetting characteristics can be obtained on the bearing surface by a method of plating a film on the bearing surface or the like. However, the wear resistance between the friction surfaces of the bearing is not significantly improved, which directly restricts further improvement in the life of the bearing.

With regard to method 3, wear resistance between sliding surfaces can be improved by plating wear-resistant materials such as tetrahedral amorphous carbon, molybdenum disulfide, diamond, polycrystalline diamond, and the like on the sliding surfaces of the bearing, but the effect on improving the wettability of the bearing lubrication and the friction surfaces is general. In addition, the method 3 can achieve the effects of simultaneously improving the wettability of the bearing lubricant with the friction surface and improving the wear resistance between the sliding surfaces by plating the wear-resistant coating and heating, chemically treating and blasting the bearing surface after plating the coating. However, the processes of heating, chemical treatment and sand blasting for the bearing surface after coating are complex, and in the process of applying the process, the existing wear-resistant coating on the surface needs to be specially protected, which greatly increases the difficulty of the bearing manufacturing process. Also, the heating, chemical treatment and blasting processes can also lead to premature cracking or flaking of the existing wear resistant coating on the bearing surface. Not only can the final bearing surface fail to achieve good wetting characteristics, but the wear resistant coating on the bearing surface can also be damaged, affecting wear resistance.

As described above, the wettability of the friction surface with the lubricating medium and the wear resistance between the friction surfaces of the sliding bearing for a rotary anode X-ray tube are important for the performance and the service life of the bearing. In the prior art, the bearing surface is regarded as a whole, and a single coating is plated on the surface, so that the obtained bearing surface can only improve wettability or wear resistance, cannot give consideration to both wettability and wear resistance, and finally has a limited effect on improving the overall performance of the bearing.

Aiming at the technical problem that the sliding bearing in the prior art cannot simultaneously consider the wettability and the wear resistance, so that the performance of the sliding bearing is poor, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the application provides a liquid metal dynamic pressure sliding bearing, a groove coating manufacturing method and an X-ray tube, and aims to at least solve the technical problem that the sliding bearing in the prior art cannot simultaneously give consideration to wettability and wear resistance, so that the sliding bearing is poor in performance.

According to an aspect of an embodiment of the present application, there is provided a sliding bearing including: the bearing comprises a bearing core, a rotary shell arranged outside the bearing core and a liquid metal material arranged between the bearing core and the rotary shell, wherein the rotary shell can rotate around the bearing core, at least one part of the surface of the rotary shell opposite to the bearing core and/or at least one part of the surface of the bearing core opposite to the rotary shell is provided with a plurality of grooves, the edge surfaces of the grooves are provided with wear-resistant coatings made of wear-resistant materials, and the bottom surfaces and/or the side surfaces of the grooves are provided with first wetting coatings made of wetting materials.

According to another aspect of embodiments of the present application, there is also provided an X-ray tube including: an anode target disk; and a sliding bearing arranged at the rear side of the anode target disk and connected with the anode target disk, wherein the sliding bearing comprises: the bearing comprises a bearing core, a rotary shell arranged outside the bearing core and a liquid metal material arranged between the bearing core and the rotary shell, wherein the rotary shell can rotate around the bearing core, and is characterized in that at least one part of the surface of the rotary shell opposite to the bearing core and/or at least one part of the surface of the bearing core opposite to the rotary shell is provided with a plurality of grooves, the edge surfaces of the grooves are provided with wear-resistant coatings made of wear-resistant materials, and the bottom surfaces and/or the side surfaces of the grooves are provided with first wetting coatings made of wetting materials.

In the embodiment of the present application, the sliding bearing includes a rotating shell, a bearing core, and a liquid metal material, wherein the rotating shell is sleeved on the bearing core, that is, an inner surface of the rotating outer sleeve is opposite to an outer surface of the bearing core. The outer surface of the bearing core is provided with grooves, the surfaces of the edges of the grooves are coated with wear-resistant coatings, and the bottom surfaces and/or the side surfaces of the grooves are coated with wetting coatings, so that the wettability and the wear resistance of the sliding bearing are improved simultaneously. In the prior art, the bearing surface is regarded as a whole, and a single coating is plated on the surface, so that the obtained bearing surface only can improve the wettability or the wear resistance, cannot improve the wettability and the wear resistance simultaneously, and finally has a limited effect on improving the overall performance of the bearing. Compared with the prior art, the sliding bearing in the technical scheme has the advantages that the groove is formed in the outer surface of the bearing core, and the wetting coating and the wear-resistant coating are respectively plated at different positions of the groove, so that the wettability and the wear resistance of the sliding bearing can be improved simultaneously in such a mode. And the technical effects of improving the performance of the sliding bearing, prolonging the failure time of the sliding bearing, prolonging the service life and the like are achieved. And then solved the sliding bearing that exists among the prior art and can't compromise wetting property and wearability simultaneously, the technical problem that the sliding bearing performance is poor that causes.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is an overall schematic view of a plain bearing according to embodiment 1 of the present application;

FIG. 2 is a schematic illustration of a bearing core of the plain bearing shown in FIG. 1;

FIG. 3 is a schematic illustration of a rotating outer sleeve of the plain bearing shown in FIG. 1;

FIG. 4a is a schematic representation of a rotating flange of the plain bearing shown in FIG. 1;

FIG. 4b is a schematic partial enlarged view of the rotating flange shown in FIG. 4 a;

FIG. 5a is a schematic partial enlarged view of a groove of the bearing core shown in FIG. 3;

fig. 5b is a schematic view of a plain bearing having straight grooves according to embodiment 1 of the present application;

fig. 5c is a schematic view of a plain bearing having an inclined groove according to embodiment 1 of the present application;

fig. 6 is an overall schematic view of another slide bearing according to embodiment 1 of the present application;

FIG. 7a is a schematic view showing a state of a liquid metal material before aluminizing a bearing surface according to embodiment 1 of the present application;

FIG. 7b is a schematic view showing the state of a liquid metal material before silver plating of a bearing surface according to embodiment 1 of the present application;

FIG. 7c is a schematic view showing a state of a liquid metal material before plating gold on a bearing surface according to embodiment 1 of the present application;

fig. 8a is a schematic view of a state of a liquid metal material after aluminum plating of a bearing surface according to embodiment 1 of the present application;

FIG. 8b is a schematic view showing the state of the liquid metal material after silver plating the bearing surface according to embodiment 1 of the present application;

FIG. 8c is a schematic view showing a state of a liquid metal material after gold plating of a bearing surface according to embodiment 1 of the present application;

FIG. 9a is a schematic view of a bearing mask component according to example 1 of the present application; and

FIG. 9b is yet another schematic view of a bearing mask component according to example 1 of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are merely exemplary of some, and not all, of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing the embodiments of the application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Fig. 1 schematically shows a schematic view of a plain bearing according to an embodiment of the present application. Referring to fig. 1, there is provided a sliding bearing including: a bearing core 100, a rotary housing 200 arranged outside the bearing core 100, and a liquid metal material arranged between the bearing core 100 and the rotary housing 200, wherein the rotary housing 200 is rotatable around the bearing core 100, at least a part of a surface of the rotary housing 200 opposite to the bearing core 100 and/or at least a part of a surface of the bearing core 100 opposite to the rotary housing 200 is provided with a plurality of grooves 300, and wherein a ridge surface 310 of the grooves 300 is provided with a wear-resistant coating composed of a wear-resistant material, and a bottom surface 320 and/or a side surface 330 of the grooves 300 is provided with a first wetting coating composed of a wetting material.

Specifically, referring to fig. 1, a plain bearing for a rotary anode X-ray tube includes a bearing core 100 and a rotary case 200. At least a portion of the outer surface of the bearing core 100 is provided with the groove 300, and at least a portion of the inner surface of the rotary housing 200 is also provided with the groove 300. Wherein the number of trenches 300 is not limited. And wherein the groove 300 includes a land surface 310, a bottom surface 320, and side surfaces 330. The land surface 310 is provided with a wear resistant coating of a wear resistant material and the bottom surface 320 and/or the side surfaces 330 are provided with a wetting coating of a wetting material (i.e., a first wetting coating). Then, the rotating housing 200 is sleeved outside the bearing core 100, and a liquid metal material is disposed between the rotating housing 200 and the bearing core 100. The slide bearing mounting is thus completed. At this time, the inner surface of the rotary housing 200 is opposite to the outer surface of the bearing core 100, and the rotary housing 200 can rotate around the bearing core 100. Wherein the rotary housing 200 is a rotating member and the bearing core 100 is a stationary member that can support the rotating member. And wherein the rotary case 200 and the bearing core 100 are made of a metal material having corrosion resistance to a gallium or gallium alloy lubricant, such as tantalum, tungsten, molybdenum, and the like. The edge surfaces 310 of the grooves 300 are coated with a wear resistant coating such as molybdenum disulfide, tungsten disulfide, and diamond-like carbon. The bottom surface 320 and the side surfaces 330 of the channel 300 are plated with a wetting coating, which may be, for example, gold, silver, carbide, boride or nitride.

As described in the background, the characteristics of a sliding bearing for a rotary anode X-ray tube, the wettability of its friction surface with a lubricating medium, and the wear resistance between the friction surfaces, are critical to the performance and service life of the bearing. In the prior art, the bearing surface is regarded as a whole, and a single coating is plated on the surface, so that the obtained bearing surface can only improve wettability or wear resistance, cannot give consideration to both wettability and wear resistance, and finally has a limited effect on improving the overall performance of the bearing.

To above-mentioned technical problem, through the technical scheme of this application embodiment, slide bearing includes rotating shell, bearing core and liquid metal material, and rotating shell cover is located on the bearing core, and the internal surface of rotatory overcoat is relative with the surface of bearing core promptly. The outer surface of the bearing core is provided with grooves, the surfaces of the edges of the grooves are coated with wear-resistant coatings, and the bottom surfaces and/or the side surfaces of the grooves are coated with wetting coatings, so that the wettability and the wear resistance of the sliding bearing are improved simultaneously. In the prior art, the bearing surface is regarded as a whole, and a single coating is plated on the surface, so that the obtained bearing surface can only improve wettability or wear resistance, cannot improve the wettability and wear resistance simultaneously, and finally has a limited effect on improving the overall performance of the bearing. Compared with the prior art, the sliding bearing in the technical scheme has the advantages that the groove is formed in the outer surface of the bearing core, and the wetting coating and the wear-resistant coating are respectively plated at different positions of the groove, so that the wettability and the wear resistance of the sliding bearing can be improved simultaneously in such a mode. And the technical effects of improving the performance of the sliding bearing, prolonging the failure time of the sliding bearing, prolonging the service life and the like are achieved. And then solved the sliding bearing that exists among the prior art and can't compromise wetting property and wearability simultaneously, the technical problem that the sliding bearing performance is poor that causes.

Optionally, the bearing core 100 and/or the surface of the rotary housing 200 opposite the groove 300 is provided with a second wetting coating of a wetting material.

Specifically, the smooth surface of the bearing core 100 not provided with the grooves 300 is provided with a wet coating (i.e., a second wet coating). The rotating housing 200 is then sleeved outside the bearing core 100, and the smooth surface of the bearing core 100 provided with the wetting coating (i.e., the second wetting coating) is opposite to the groove 300 provided on the inner surface of the rotating housing 200.

Alternatively, the smooth surface of the rotary housing 200 not provided with the grooves 300 is provided with a wet coating (i.e., a second wet coating). Then, the rotary housing 200 is sleeved outside the bearing core 100, and the smooth surface of the rotary housing 200 provided with the wetting coating (i.e., the second wetting coating) is opposite to the groove 300 provided on the outer surface of the bearing core 100.

Alternatively, the smooth surface of the bearing core 100 not provided with the grooves 300 is provided with a wet coating (i.e., a second wet coating). The smooth surface of the rotary housing 200 not provided with the grooves 300 is provided with a wetting coating (i.e., a second wetting coating). After the rotating housing 200 is sleeved outside the bearing core 100, the smooth surface of the bearing core 100 provided with the wetting coating (i.e., the second wetting coating) is opposite to the groove 300 provided on the inner surface of the rotating housing 200, and the smooth surface of the bearing core 100 provided with the wetting coating (i.e., the second wetting coating) is opposite to the groove 300 provided on the inner surface of the rotating housing 200.

Thereby, this technical scheme is provided with the wet coating through the smooth surface relative with the slot that is provided with wear-resistant coating to can improve the wettability and the wearability of slide bearing simultaneously.

Optionally, the rotating housing 200 includes a rotating outer sleeve 210 and a rotating flange 220, wherein the rotating outer sleeve 210 is sleeved outside the bearing core 100 from the front end of the bearing core 100, and the rotating outer sleeve 210 can rotate around the bearing core 100; and a rotating flange 220 is sleeved outside the bearing core 100 and connected with the rear end of the rotating outer sleeve 210, and the rotating flange 220 can rotate around the bearing core 100, and wherein at least a part of the surface of the rotating outer sleeve 210 opposite to the bearing core 100, at least a part of the surface of the bearing core 100 opposite to the rotating outer sleeve 210, at least a part of the surface of the rotating flange 220 opposite to the bearing core 100, and/or at least a part of the surface of the bearing core 100 opposite to the rotating flange 220 is provided with a groove 300.

Specifically, the swivel case 200 includes a swivel housing 210 and a swivel flange 220. Therefore, the rotary outer sleeve 210 can be fitted outside the bearing core 100 from the front end of the bearing core 100, and the rotary flange 220 can be fitted outside the bearing core 100 from the rear end of the bearing core 100. The rotating flange 220 is then coupled to the rear end of the rotating outer sleeve 210. After the sleeving is completed, the rotating outer sleeve 210 is opposite to at least a part of the surface of the bearing core 100, and before the sleeving, the groove 300 is formed on at least a part of the surface of the rotating outer sleeve 210 opposite to the bearing core 100. The bearing core 100 is opposite to at least a portion of the surface of the rotating outer sleeve 210, and before the sleeving, the groove 300 is provided on at least a portion of the surface of the bearing core 100 opposite to the rotating outer sleeve 210. The rotating flange 220 is opposite to at least a portion of the surface of the bearing core 100, and before the sleeving, a groove 300 is provided on at least a portion of the surface of the rotating flange 220 opposite to the bearing core 100. The bearing core 100 is opposite to at least a portion of the surface of the rotating flange 220, and before the housing is formed, the groove 300 is formed on at least a portion of the surface of the bearing core 100 opposite to the rotating flange 220.

Further, the rotating outer sleeve 210 and the rotating flange 220 rotate around the bearing core 100.

Thus, the present invention can ensure the wettability and wear resistance of each component of the sliding bearing by providing the rotating outer sleeve 210, the rotating flange 220, and at least a portion of the surface of the bearing core 100 with grooves.

Optionally, the surfaces of the bearing core 100, the rotating outer sleeve 210 and/or the rotating flange 220 opposite the groove 300 are provided with a second wetting coating of a wetting material.

Specifically, a part of the outer surface of the bearing core 100 is provided with a smooth surface, and the smooth surface is provided with a second wet coating layer made of a wetting material, and the surfaces of the rotating outer sleeve 210 and the rotating flange 220 opposite to the bearing core 100 are provided with grooves 300. After the rotating outer sleeve 210 and the rotating flange 220 are sleeved outside the bearing core 100, the surface of the bearing core 100 provided with the wetting coating (i.e., the second wetting coating) is opposite to the groove 300 provided on the inner surface of the rotating outer sleeve 210. And the surface of the bearing core 100 provided with the wet coating (i.e., the second wet coating) is opposite to the groove 300 provided on the inner surface of the rotating flange 220.

Optionally, the bearing core 100 comprises a bearing core body 110, wherein at least a portion of the groove 300 is provided at a side surface 111 of the bearing core body 110 opposite the rotating outer sleeve 210, or at an inner surface 211 of the rotating outer sleeve 210 opposite the bearing core body 110.

Specifically, referring to fig. 2 and 3, the bearing core 100 includes a bearing core body 110, a side surface 111 of the bearing core body 110 is provided with grooves 300, and an inner surface 211 of the rotation outer sleeve 210 opposite to the grooves 300 provided on the side surface 111 is a smooth surface.

Alternatively, the side surface 111 of the bearing core 110 is provided with a smooth surface, and the inner surface 211 of the rotating outer sleeve 210 opposite to the side surface 111 is provided with grooves 300 (not shown in the drawings).

Optionally, the bearing core 100 further includes a boss 120 disposed on the side surface 111 of the bearing core body 110, wherein the rotating outer sleeve 210 is disposed on the front side of the boss 120, and the rotating flange 220 is disposed on the rear side of the boss 120.

Specifically, referring to fig. 2, the bearing core 100 includes a boss 120 in addition to the bearing core body 110. Wherein the boss 120 is provided to the side surface 111 of the bearing core body 110. So that the rotary housing 210 is installed at the front side of the boss 120, the rotary flange 220 is installed at the rear side of the boss 120, and the rotary housing 210 is connected with the rotary flange 220. Thus, the rotary outer sleeve 210 and the rotary flange 220 are respectively installed, so that the rotary outer sleeve and the rotary flange are easier to disassemble and install.

Optionally, at least a portion of the groove 300 is disposed on a surface of the rotating jacket 210 opposite the boss 120, or on a surface of the boss 120 opposite the rotating jacket 210.

Specifically, a part of the surface of the rotation sleeve 210 is opposite to a part of the surface of the boss 120, the surface of the rotation sleeve 210 opposite to the boss 120 is provided with the groove 300, and the surface of the boss 120 opposite to the rotation sleeve 210 is a smooth surface.

Alternatively, a part of the surface of the rotation sleeve 210 is opposite to a part of the surface of the boss 120, the surface of the rotation sleeve 210 opposite to the boss 120 is provided with a smooth surface, and the surface of the boss 120 opposite to the rotation sleeve 210 has the groove 300 (not shown in the figure).

Alternatively, at least a portion of the groove 300 is disposed on a surface of the rotating flange 220 opposite the boss 120, or on a surface of the rotating flange 220 opposite the rotating sleeve 210.

Specifically, referring to fig. 4a and 4b, a partial surface of the rotating flange 220 is opposite to a partial surface of the boss 120, a surface of the rotating flange 220 opposite to the boss 120 is provided with the groove 300, and a surface of the boss 120 opposite to the rotating flange 220 is a smooth surface. The smooth surface of the boss 120 is plated with a wetting coating, which may be, for example, gold, silver, carbide, boride or nitride.

Alternatively, a part of the surface of the rotating flange 220 is opposite to a part of the surface of the boss 120, the surface of the rotating flange 220 opposite to the boss 120 is provided with a smooth surface, and the surface of the boss 120 opposite to the rotating flange 220 has the groove 300 (not shown in the figure).

Thereby, this technical scheme is provided with the wet coating through the smooth surface relative with the slot that is provided with wear-resistant coating to can improve slide bearing's wettability and wearability simultaneously.

Alternatively, referring to fig. 5a, the groove 300 is a herringbone groove 300. Thus, the present solution provides a plurality of different surfaces through the chevron shaped grooves, including the land surface 310, the bottom surface 320, and the side surfaces 330. As shown in fig. 5b and 5c, the trench structure according to the present embodiment may include a straight trench, an inclined trench, a splayed trench, and other trench structures besides the herringbone structure. Therefore, according to the technical scheme, different coatings are plated on the surfaces of the grooves, so that the performance of the sliding bearing can be improved in many aspects.

Optionally, the land surfaces 310 of the grooves 300 are provided with a wear resistant coating having a film thickness of no more than 5% of the depth of the grooves 300. For example, it may be 500nm to 2000 nm. Therefore, the wear resistance of the sliding bearing can be improved through reasonable film thickness.

Optionally, the bottom surface 320 and the side surfaces 330 of the trench 300 are provided with a film thickness of the first wetting coating of no more than 5% of the depth of the trench 300. For example, it may be 500um to 2000 um. Thereby, the wettability of the sliding bearing can be improved through reasonable film thickness.

Optionally, the film thickness of the second wetting coating is not more than 5% of the depth of the trench 300. For example, it may be 500um to 2000 um. Thereby, the wettability of the sliding bearing can be improved through reasonable film thickness.

Optionally, the land surfaces 310 of the grooves 300 are provided with a wear resistant coating having a roughness no greater than ra0.4. Therefore, the edge surface which is easy to wear is more wear-resistant and the service life is prolonged by setting reasonable roughness of the wear-resistant coating.

In addition, the present solution can also be applied to a bearing in which

thrust bearings

500 and 600 are placed at both ends of a bearing core 400 as shown in fig. 6. Wherein the first thrust bearing 500 and the second thrust bearing 600 are disposed at both ends of the bearing core 400. And the bearing core 400 is a radial bearing. Wherein the type of grooves on the bearing core 400 are splayed grooves.

Fig. 7a to 7c and fig. 8a to 8c show changes in wettability of the liquid metal material with the sliding bearing surface before and after plating of different metal coatings. Fig. 7a shows a state of the liquid metal material before aluminum plating of the bearing surface, and fig. 8a shows a state of the liquid metal material after aluminum plating of the bearing surface. Fig. 7b shows the state of the liquid metal material before the bearing surface is silvered, and fig. 8b shows the state of the liquid metal material after the bearing surface is silvered. Fig. 7c shows the state of the liquid metal material before plating the bearing surface with gold, and fig. 8c shows the state of the liquid metal material after plating the bearing surface with gold.

Before coating, the contact angle between the surface of the sliding bearing and the liquid metal material is more than 90 degrees. After different metal coatings are plated, the contact angle between the bearing surface and the liquid metal material is far less than 90 degrees, and the wetting effect is obviously improved.

Referring to fig. 9a and 9b, the process of plating the grooves 300 with the wear-resistant coating and the wet coating (the method of making the groove coating) is as follows:

(1) carrying out ultrasonic cleaning and drying on the bearing mask part 800;

(2) sleeving the bearing mask part 800 on the groove 300 of the bearing core 100, wherein the bearing mask part 800 is a hollow structure;

(3) masking the rib surfaces 310 of the grooves 300 by the bearing masking member 800 and exposing the bottom surfaces 320 and the side surfaces 330, and thereafter plating the bottom surfaces 320 and the side surfaces 330 of the grooves 300 with a wetting coating using a Physical Vapor Deposition (PVD) method;

(4) rotating the bearing mask part 800 on the bearing core 100 by a rib position, shielding the bottom surface 320 and the side surface 330 of the groove 300 by using the ribs in the bearing mask part 800, and exposing the rib surfaces 310 of the groove 300, and then plating the rib surfaces 310 with a wear-resistant coating using a Physical Vapor Deposition (PVD) method;

(5) bearing mask part 800 is separated from bearing core 100 resulting in a wear-resistant coated prism surface 310 and a wet-coated bottom surface 320 and side surfaces 330.

Thus, according to the first aspect of the present embodiment, the sliding bearing includes a rotating shell, a bearing core, and a liquid metal material, wherein the rotating shell is sleeved on the bearing core, i.e., the inner surface of the rotating outer sleeve is opposite to the outer surface of the bearing core. The outer surface of the bearing core is provided with grooves, the surfaces of the edges of the grooves are coated with wear-resistant coatings, and the bottom surfaces and/or the side surfaces of the grooves are coated with wetting coatings, so that the wettability and the wear resistance of the sliding bearing are improved simultaneously. In the prior art, the bearing surface is regarded as a whole, and a single coating is plated on the surface, so that the obtained bearing surface can only improve wettability or wear resistance, cannot improve the wettability and wear resistance simultaneously, and finally has a limited effect on improving the overall performance of the bearing. Compared with the prior art, the sliding bearing in the technical scheme has the advantages that the groove is formed in the outer surface of the bearing core, and the wetting coating and the wear-resistant coating are respectively plated at different positions of the groove, so that the wettability and the wear resistance of the sliding bearing can be improved simultaneously in such a mode. And the technical effects of improving the performance of the sliding bearing, prolonging the failure time of the sliding bearing, prolonging the service life and the like are achieved. And then solved the sliding bearing that exists among the prior art and can't compromise wetting property and wearability simultaneously, the technical problem that the sliding bearing performance is poor that causes.

Further, according to a second aspect of the present embodiment, there is provided an X-ray tube including: an anode target disk; and a sliding bearing arranged at the rear side of the anode target disk and connected with the anode target disk, wherein the sliding bearing comprises: a bearing core 100, a rotary housing 200 arranged outside the bearing core 100, and a liquid metal material arranged between the bearing core 100 and the rotary housing 200, wherein the rotary housing 200 is rotatable around the bearing core 100, characterized in that at least a part of a surface of the rotary housing 200 opposite to the bearing core 100 and/or at least a part of a surface of the bearing core 100 opposite to the rotary housing 200 is provided with a plurality of grooves 300, and wherein a ridge surface 310 of the grooves 300 is provided with a wear-resistant coating composed of a wear-resistant material, and a bottom surface 320 and/or a side surface 330 of the grooves 300 is provided with a first wetting coating composed of a wetting material.

Optionally, the surface of the bearing core 100 and/or the rotary housing 200 opposite the groove 300 is provided with a second wetting coating of a wetting material.

Optionally, the rotating housing 200 includes a rotating outer sleeve 210 and a rotating flange 220, wherein the rotating outer sleeve 210 is sleeved outside the bearing core 100 from the front end of the bearing core 100, and the rotating outer sleeve 210 can rotate around the bearing core 100; and a rotating flange 220 which is sleeved outside the bearing core 100 and connected with the rear end of the rotating outer sleeve 210, and the rotating flange 220 can rotate around the bearing core 100, and wherein at least a part of the surface of the rotating outer sleeve 210 opposite to the bearing core 100, at least a part of the surface of the bearing core 100 opposite to the rotating outer sleeve 210, at least a part of the surface of the rotating flange 220 opposite to the bearing core 100, and/or at least a part of the surface of the bearing core 100 opposite to the rotating flange 220 is provided with a groove 300.

Optionally, the surfaces of the bearing core 100, the rotating outer sleeve 210 and/or the rotating flange 220 opposite the grooves 300 are provided with a second wetting coating of a wetting material.

Optionally, the bearing core 100 comprises a bearing core body 110, wherein at least a portion of the groove 300 is disposed on a side surface 111 of the bearing core body 110 opposite the rotating outer sleeve 210, or on an inner surface 211 of the rotating outer sleeve 210 opposite the bearing core body 110.

Optionally, at least a portion of the groove 300 is disposed on a surface of the rotating flange 220 opposite the boss 120, or on a surface of the rotating flange 220 opposite the rotating outer sleeve 210.

Optionally, the groove 300 is a herringbone groove 300.

Optionally, the land surfaces 310 of the grooves 300 are provided with a wear resistant coating having a film thickness of no more than 5% of the depth of the grooves 300.

Optionally, the bottom surface 320 and the side surfaces 330 of the trench 300 are provided with a first wetting coating having a film thickness of no more than 5% of the depth of the trench 300.

Optionally, the film thickness of the second wetting coating is not more than 5% of the depth of the trench 300.

Optionally, the land surfaces 310 of the grooves 300 are provided with a wear resistant coating having a roughness no greater than ra0.4.

Thus, according to this embodiment, the sliding bearing includes a rotating shell, a bearing core, and a liquid metal material, wherein the rotating shell is sleeved on the bearing core, i.e., the inner surface of the rotating outer sleeve is opposite to the outer surface of the bearing core. The outer surface of the bearing core is provided with grooves, the surfaces of the edges of the grooves are coated with wear-resistant coatings, and the bottom surfaces and/or the side surfaces of the grooves are coated with wetting coatings, so that the wettability and the wear resistance of the sliding bearing are improved simultaneously. In the prior art, the bearing surface is regarded as a whole, and a single coating is plated on the surface, so that the obtained bearing surface can only improve wettability or wear resistance, cannot improve the wettability and wear resistance simultaneously, and finally has a limited effect on improving the overall performance of the bearing. Compared with the prior art, the sliding bearing in the technical scheme has the advantages that the groove is formed in the outer surface of the bearing core, and the wetting coating and the wear-resistant coating are respectively plated at different positions of the groove, so that the wettability and the wear resistance of the sliding bearing can be improved simultaneously in such a mode. And the technical effects of improving the performance of the sliding bearing, prolonging the failure time of the sliding bearing, prolonging the service life and the like are achieved. And then solved the sliding bearing that exists among the prior art and can't compromise wetting property and wearability simultaneously, the technical problem that the sliding bearing performance is poor that causes.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.

Claims

1. A plain bearing comprising: a bearing core (100), a rotating housing (200) arranged outside the bearing core (100), and a liquid metal material arranged between the bearing core (100) and the rotating housing (200), wherein the rotating housing (200) is rotatable around the bearing core (100), characterized in that,

at least a part of the surface of the rotary housing (200) opposite to the bearing core (100) and/or at least a part of the surface of the bearing core (100) opposite to the rotary housing (200) is provided with a plurality of grooves (300), and wherein

The edge surfaces (310) of the grooves (300) are provided with a wear resistant coating of a wear resistant material, and the bottom surfaces (320) and/or the side surfaces (330) of the grooves (300) are provided with a first wetting coating of a wetting material.

2. A plain bearing according to claim 1, characterized in that the surface of the bearing core (100) and/or the rotating housing (200) opposite the groove (300) is provided with a second wetting coating of a wetting material.

3. A plain bearing according to claim 2, characterized in that the rotary housing (200) comprises a rotary outer sleeve (210) and a rotary flange (220), wherein

The rotating outer sleeve (210) is sleeved outside the bearing core (100) from the front end of the bearing core (100), and the rotating outer sleeve (210) can rotate around the bearing core (100); and

the rotating flange (220) is sleeved outside the bearing core (100) and connected with the rear end of the rotating outer sleeve (210), and the rotating flange (220) can rotate around the bearing core (100), and the rotating flange (220) is arranged on the outer side of the bearing core (100)

At least a part of the surface of the rotating outer sleeve (210) opposite to the bearing core (100), at least a part of the surface of the bearing core (100) opposite to the rotating outer sleeve (210), at least a part of the surface of the rotating flange (220) opposite to the bearing core (100) and/or at least a part of the surface of the bearing core (100) opposite to the rotating flange (220) is provided with the groove (300).

4. A plain bearing according to claim 3, characterized in that the surface of the bearing core (100), the rotating outer sleeve (210) and/or the rotating flange (220) opposite the groove (300) is provided with the second wetting coating of a wetting material.

5. A plain bearing according to claim 3, characterized in that the bearing core (100) comprises a bearing core body (110), wherein at least a part of the groove (300) is provided at a side surface (111) of the bearing core body (110) opposite the rotating outer sleeve (210) or at an inner surface (211) of the rotating outer sleeve (210) opposite the bearing core body (110).

6. A plain bearing according to claim 5, characterized in that the bearing core (100) further comprises a boss (120) provided on a side surface (111) of the bearing core body (110), wherein the rotating outer sleeve (210) is provided on a front side of the boss (120) and the rotating flange (220) is provided on a rear side of the boss (120), wherein

At least a part of the groove (300) is provided on a surface of the rotating outer sleeve (210) opposite to the boss (120) or on a surface of the boss (120) opposite to the rotating outer sleeve (210).

7. A plain bearing according to claim 6, characterized in that at least a part of the groove (300) is provided on a surface of the rotating flange (220) opposite the boss (120) or on a surface of the rotating flange (220) opposite the rotating sleeve (210).

8. A plain bearing according to claim 1, characterized in that the groove (300) is a herringbone groove (300), and that

The thickness of the film layer of the wear-resistant coating arranged on the edge surface (310) of the groove (300) is not more than 5 percent of the depth of the groove (300), and

the bottom surface (320) and the side surface (330) of the trench (300) are provided with a first wetting coating having a film thickness of not more than 5% of the depth of the trench (300), and

the roughness of the wear-resistant coating arranged on the edge surface (310) of the groove (300) is not more than Ra0.4.

9. A plain bearing according to claim 2, characterized in that the film thickness of the second wetting coating is not more than 5% of the depth of the groove (300).

10. An X-ray tube comprising: an anode target disk; and a sliding bearing provided at a rear side of the anode target disk and connected with the anode target disk, wherein the sliding bearing includes: a bearing core (100), a rotating housing (200) arranged outside the bearing core (100), and a liquid metal material arranged between the bearing core (100) and the rotating housing (200), wherein the rotating housing (200) is rotatable around the bearing core (100), characterized in that,

at least a part of the surface of the rotary housing (200) opposite the bearing core (100) and/or at least a part of the surface of the bearing core (100) opposite the rotary housing (200) is provided with a plurality of grooves (300), and wherein the edge surfaces (310) of the grooves (300) are provided with a wear resistant coating of a wear resistant material, and the bottom surfaces (320) and/or the side surfaces (330) of the grooves (300) are provided with a first wetting coating of a wetting material, and

the bearing core (100) and/or the surface of the rotating housing (200) opposite to the groove (300) is provided with a second wetting coating of a wetting material, and

the rotating shell (200) comprises a rotating outer sleeve (210) and a rotating flange (220), wherein the rotating outer sleeve (210) is sleeved outside the bearing core (100) from the front end of the bearing core (100), and the rotating outer sleeve (210) can rotate around the bearing core (100); and the rotating flange (220) is sleeved outside the bearing core (100) and connected with the rear end of the rotating outer sleeve (210), and the rotating flange (220) can rotate around the bearing core (100), and at least a part of the surface of the rotating outer sleeve (210) opposite to the bearing core (100), at least a part of the surface of the bearing core (100) opposite to the rotating outer sleeve (210), at least a part of the surface of the rotating flange (220) opposite to the bearing core (100) and/or at least a part of the surface of the bearing core (100) opposite to the rotating flange (220) is provided with the groove (300), and

the surface of the bearing core (100), the rotating outer sleeve (210) and/or the rotating flange (220) opposite to the groove (300) is provided with the second wetting coating consisting of a wetting material, and

the bearing core (100) comprises a bearing core body (110), wherein at least a portion of the groove (300) is provided to a side surface (111) of the bearing core body (110) opposite the rotating outer sleeve (210) or to an inner surface (211) of the rotating outer sleeve (210) opposite the bearing core body (110), and

the bearing core (100) further comprises a boss (120) arranged on the side surface (111) of the bearing core body (110), wherein the rotating outer sleeve (210) is arranged on the front side of the boss (120), the rotating flange (220) is arranged on the rear side of the boss (120), and

at least a part of the groove (300) is provided on a surface of the rotation sleeve (210) opposite to the boss (120) or on a surface of the boss (120) opposite to the rotation sleeve (210), and

at least a part of the groove (300) is provided on a surface of the rotating flange (220) opposite to the boss (120) or on a surface of the rotating flange (220) opposite to the rotating outer sleeve (210), and

the groove (300) is a herringbone groove (300), and

the second wetting coating has a film thickness of no more than 5% of the depth of the trench (300), and