A friction-reducing bearing and its preparation method

Abstract

The present application belongs to the technical field of antifriction bearings, and discloses an antifriction bearing and a preparation method thereof, wherein the antifriction bearing comprises: a bearing body and a groove array arranged on the inner circumference of the bearing body; the groove array is used to reduce the friction coefficient of the antifriction bearing and improve the wear resistance of the antifriction bearing; the groove array is provided with a plurality of wave-like cross-sectional curve grooves, the plurality of cross-sectional curve grooves are evenly distributed along the inner circumference of the bearing body, the distance between two adjacent cross-sectional curve grooves along the circumference of the bearing body is equal, and a solid lubricant is arranged in each cross-sectional curve groove. The antifriction bearing is formed by processing a plurality of wave-like cross-sectional curve grooves on the inner circumference of the bearing body, and the groove array formed by the plurality of wave-like cross-sectional curve grooves can reduce the friction coefficient of the antifriction bearing and improve the wear resistance and reliability of the antifriction bearing.

Description

Technical Field

[0001] The present application relates to the technical field of anti-friction bearings, and in particular, to an anti-friction bearing and a preparation method thereof. Background Art

[0002] As one of the essential components of high-end equipment, bearing performance directly impacts the efficiency and reliability of the entire mechanical system. Especially in high-load and high-friction operating environments, bearing friction and wear become key factors limiting equipment performance and lifespan.

[0003] While traditional bearings offer a certain level of load-bearing capacity and wear resistance, they can be affected by extreme conditions, such as high temperatures, high pressures, or chemically corrosive environments, which can reduce these capabilities and wear resistance. Traditional bearings are prone to high coefficients of friction under high loads, which can lead to fatigue cracks over time, impacting their service life and reliability. Furthermore, traditional lubrication technologies may not provide adequate lubrication in certain situations, leading to premature bearing failure.

[0004] Therefore, in order to solve the technical problems that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions, there is an urgent need for an anti-friction bearing and a preparation method thereof. Summary of the Invention

[0005] The purpose of this application is to provide an anti-friction bearing and a preparation method thereof, which solves the problem that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions through the anti-friction bearing composed of a bearing body and a groove array containing multiple wave-like cross-sectional curved grooves arranged on the inner circumference of the bearing body. The groove array formed by multiple wave-like cross-sectional curved grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing.

[0006] In a first aspect, the present application provides an anti-friction bearing, comprising a bearing body and a groove array provided on an inner circumferential surface of the bearing body;

[0007] The groove array is used to reduce the friction coefficient of the anti-friction bearing and improve the wear resistance of the anti-friction bearing; the groove array is provided with a plurality of wave-shaped cross-sectional curve grooves, and the plurality of cross-sectional curve grooves are evenly distributed along the inner circumferential surface of the bearing body. The distance between two adjacent cross-sectional curve grooves in the direction along the circumferential surface of the bearing body is equal, and solid lubricant is provided in each cross-sectional curve groove.

[0008] The anti-friction bearing provided in the present application can reduce the friction coefficient of the anti-friction bearing. The anti-friction bearing is composed of a bearing body and a groove array containing multiple wave-like cross-sectional curved grooves arranged on the inner circumference of the bearing body. It solves the problem that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions. The groove array formed by multiple wave-like cross-sectional curved grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing.

[0009] Optionally, the bearing body is made of a single metal or an alloy metal.

[0010] Optionally, the cross-sectional curved groove is manufactured to imitate the surface contour of a bay scallop.

[0011] Optionally, the depth of the cross-sectional curved groove is 10-50 μm, and the width of the cross-sectional curved groove is 60-120 μm.

[0012] Optionally, the cross-sectional curve expression corresponding to the cross-sectional curve groove is specifically:

[0013] ;

[0014] Among them, x is the axial coordinate and y is the circumferential coordinate.

[0015] The anti-friction bearing provided in the present application can reduce the friction coefficient of the anti-friction bearing. By processing the inner circumferential surface of the bearing body with a cross-sectional curve imitating the surface contour of the bay scallop, a plurality of cross-sectional curve grooves with equal relative distances and uniform distribution are obtained. The cross-sectional curve grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance of the anti-friction bearing.

[0016] In a second aspect, the present application provides a method for preparing an anti-friction bearing, which is used to prepare the anti-friction bearing described above, comprising:

[0017] Obtain surface profile scans of bay scallops;

[0018] Cutting off sections of the surface profile of the bay scallop multiple times from the surface profile scanning result, and performing curve fitting on multiple position points of the multiple sections to obtain a cross-sectional curve with a wave-like shape;

[0019] A plurality of cross-sectional curve grooves corresponding to the cross-sectional curve are prepared on the inner circumference of the preset first bearing, to obtain a second bearing having an inner circumference with a groove array composed of a plurality of cross-sectional curve grooves with equal relative distances;

[0020] The second bearing is subjected to a pre-pressing operation and a main pressing operation to fix the solid lubricant in the groove array, thereby preparing an anti-friction bearing.

[0021] The method for preparing the anti-friction bearing prepares a groove array composed of multiple cross-sectional curve grooves corresponding to the cross-sectional curve on the inner peripheral surface of a preset first bearing, and fixes a solid lubricant in the groove array through a pre-pressing operation and a main pressing operation to prepare the anti-friction bearing. The method solves the problem that traditional bearings have reduced load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions. The groove array formed by multiple wave-like cross-sectional curve grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing.

[0022] Optionally, a plurality of cross sections of the surface profile of the bay scallop are intercepted from the surface profile scanning result to perform curve fitting on a plurality of position points of the plurality of cross sections to obtain a wave-like cross-sectional curve, comprising:

[0023] intercepting arc sections of the surface profile of the bay scallop at different arc lengths multiple times from the surface profile scanning result in an arc-shaped interception manner to obtain multiple arc sections;

[0024] Extracting the positions of the position points corresponding to the same center angle from each of the arc cross sections, and taking the position average of the position points as the position of the surface contour position point of the bay scallop;

[0025] Converting the surface contour position points into equivalent position points on a two-dimensional plane according to the positions of the surface contour position points to obtain the positions of the equivalent position points;

[0026] Based on the positions of the equivalent position points, curve fitting is performed on a plurality of the equivalent position points to obtain a cross-sectional curve with a wave-like shape.

[0027] The anti-friction bearing provided in this application can reduce the friction coefficient of the anti-friction bearing. A wave-like cross-sectional curve is produced through the surface profile of the bay scallop. The groove array produced using the cross-sectional curve can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance of the anti-friction bearing.

[0028] Optionally, performing a pre-pressing operation and a main pressing operation on the second bearing to fix the solid lubricant in the groove array to prepare an anti-friction bearing, comprising:

[0029] Cleaning the surface of the second bearing to remove surface impurities generated when preparing the groove array;

[0030] Using a self-lubricating filling technology, pre-pressing the second bearing to uniformly fill the groove array with solid lubricant to obtain a third bearing;

[0031] The third bearing is fixed in a preset extrusion die, and the extrusion die with the third bearing fixed therein is heated and then naturally cooled to obtain an anti-friction bearing with the solid lubricant fixed in the groove array.

[0032] Optionally, a self-lubricating filling technology is used to pre-press the second bearing to uniformly fill the groove array with solid lubricant, thereby obtaining a third bearing, comprising:

[0033] placing the second bearing in a vacuum adsorption device;

[0034] Using the vacuum adsorption device, evacuating the second bearing, while simultaneously inputting lubricant into the groove array, so that the solid lubricant is incorporated into the groove array;

[0035] After the solid lubricant is incorporated into the groove array, the vacuum operation is maintained and a pre-pressing tool with a smooth and flat surface is used to pre-press the second bearing so that the solid lubricant is evenly filled in the groove array to obtain a third bearing.

[0036] Optionally, the third bearing is fixed in a preset extrusion die, and the extrusion die with the third bearing fixed therein is heated and then naturally cooled to obtain an anti-friction bearing, comprising:

[0037] Fixing the third bearing in a preset extrusion die and extruding it to obtain a bearing module;

[0038] While maintaining the vacuum environment, heating the bearing module according to a preset heating temperature and a preset heating time;

[0039] After the heating is completed, the mixture is naturally cooled to room temperature to obtain an anti-friction bearing in which the solid lubricant is fixed in the groove array.

[0040] Beneficial effects: The anti-friction bearing and preparation method provided in the present application prepare a groove array composed of multiple cross-sectional curve grooves corresponding to the cross-sectional curve on the inner circumference of a preset first bearing, and fix the solid lubricant in the groove array through pre-pressing operation and main pressing operation to prepare an anti-friction bearing, which solves the problem that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions. The groove array formed by multiple wave-like cross-sectional curve grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of the anti-friction bearing provided in an embodiment of the present application.

[0042] Figure 2 Flowchart of the method for preparing the anti-friction bearing provided in an embodiment of the present application.

[0043] Figure 3 A schematic diagram of a method for intercepting a two-dimensional cross section provided in an embodiment of the present application.

[0044] Figure 4 A schematic diagram of another method of intercepting a two-dimensional cross section provided in an embodiment of the present application.

[0045] Explanation of reference numerals: 1. Bearing body; 2. Groove array; 3. Cross-sectional curved groove. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0047] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0048] Please refer to Figure 1 , Figure 1 In some embodiments of the present application, an anti-friction bearing includes a bearing body 1 and a groove array 2 provided on the inner circumference of the bearing body 1 (referring to the circumference of the inner ring of the bearing body 1 away from the outer ring);

[0049] The groove array 2 is used to reduce the friction coefficient of the anti-friction bearing and improve the wear resistance of the anti-friction bearing; the groove array 2 is provided with a plurality of wave-shaped cross-sectional curved grooves 3, and the plurality of cross-sectional curved grooves 3 are evenly distributed along the inner circumference of the bearing body 1. The relative position points of two adjacent cross-sectional curved grooves 3 are at equal distances along the circumferential direction of the bearing body 1 (that is, the plurality of cross-sectional curved grooves 3 are relatively parallel), and solid lubricant is provided in each cross-sectional curved groove 3.

[0050] The anti-friction bearing is formed by processing a plurality of wave-like cross-sectional curved grooves on the inner circumference of the bearing body to obtain an anti-friction bearing, which solves the problem that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions. The groove array formed by the plurality of wave-like cross-sectional curved grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing.

[0051] Specifically, the bearing body 1 is made of a single metal or an alloy metal.

[0052] In specific applications, the bearing body 1 is made of a single metal or a metal alloy (such as iron, copper, aluminum, or an alloy such as stainless steel). The bearing body 1 is essentially a bearing in the prior art. Depending on actual needs, any type of existing bearing can be used as the bearing body 1 (for example, deep groove ball bearings, angular contact ball bearings, self-aligning ball bearings, spherical roller bearings, tapered roller bearings, thrust ball bearings, or any other type of existing bearing). The existing bearings are prior art and will not be described in detail here.

[0053] Specifically, the cross-sectional curved groove 3 is manufactured in accordance with the surface contour of the bay scallop.

[0054] In a specific application, a cross-sectional curve is constructed according to the strong wear resistance of the surface profile of the bay scallop, thereby producing a cross-sectional curve groove 3 with a wave-like shape.

[0055] The bay scallop (Argopecten irradians), also known as the Atlantic scallop, is native to the Atlantic coast of the United States. It often lives in shallow, rocky waters, where it is subject to long-term abrasion and erosion by sea sand. Research has found that the surface geometry of the bay scallop imparts strong resistance to abrasion, enabling it to thrive despite this long-term abrasion and erosion, while also protecting its shell from erosion.

[0056] Therefore, by precisely imitating the nanoscale corrugated shape of the bay scallop shell surface, a complex concave-convex microstructure (groove array 2) is formed on the bearing surface. The concave-convex microstructure not only naturally reduces the friction coefficient, but also optimizes the distribution of the lubricant through its unique shape and arrangement, thereby significantly improving the tribological performance of the bearing and achieving higher wear resistance and lower energy friction loss.

[0057] Specifically, the depth of the cross-sectional curved groove 3 is 10-50 μm, and the width of the cross-sectional curved groove 3 is 60-120 μm.

[0058] In specific applications, to ensure that the raised portions between the multiple cross-sectional curve grooves 3 have strong wear resistance, it is necessary to limit the depth and width of the cross-sectional curve grooves 3 so that the raised portions also exhibit a wave-like shape corresponding to the cross-sectional curve grooves 3 (i.e., the width of the raised portion (or the distance between two adjacent cross-sectional curve grooves 3) can be set to 60-120 μm). Specifically, the depth of the cross-sectional curve grooves 3 can be set to 10-50 μm, preferably 30 μm, and the width of the cross-sectional curve grooves 3 can be set to 60-120 μm, preferably 90 μm. The depth and width of the cross-sectional curve grooves 3 can be set according to actual needs.

[0059] Specifically, the cross-sectional curve expression corresponding to the cross-sectional curve groove 3 is:

[0060] ;

[0061] Wherein, x is the axial coordinate (i.e., the coordinate along the direction of the central axis of the bearing body 1 ), and y is the circumferential coordinate (i.e., the coordinate along the inner circumference of the bearing body 1 ).

[0062] In a specific application, a three-dimensional scan is performed on the surface profile of a bay scallop to obtain a three-dimensional model of the bay scallop surface profile. Multiple cross-sections of the same bay scallop surface profile are intercepted from the three-dimensional model. Position points at corresponding locations are extracted from the multiple intercepted cross-sections. The position average of the position points at the same location in different two-dimensional cross-sections is calculated. The position average is determined as the bay scallop surface profile position point. Curve fitting is performed on the surface profile position points to obtain a wave-like cross-sectional curve. The inner circumference of the bearing body 1 is machined based on the cross-sectional curve to obtain a wave-like cross-sectional curve groove. Curve fitting is a prior art and will not be described in detail here.

[0063] From the above, it can be seen that the anti-friction bearing is formed by processing a plurality of wave-shaped cross-sectional curved grooves on the inner circumference of the bearing body to obtain an anti-friction bearing with an array of grooves on the inner circumference, which solves the problem that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions. The groove array formed by the plurality of wave-shaped cross-sectional curved grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing.

[0064] refer to Figure 2 The present application provides a method for preparing an anti-friction bearing, which is used to prepare the anti-friction bearing described above, comprising the steps of:

[0065] Step S101, obtaining a surface profile scanning result of the bay scallop;

[0066] Step S102, intercepting multiple sections of the surface contour of the bay scallop from the surface contour scanning result, and performing curve fitting on multiple position points of the multiple sections to obtain a wave-like cross-sectional curve;

[0067] Step S103, preparing a plurality of cross-sectional curve grooves corresponding to the cross-sectional curve on the inner circumferential surface of the preset first bearing, to obtain a second bearing having an inner circumferential surface prepared with a groove array consisting of a plurality of cross-sectional curve grooves with equal relative distances;

[0068] Step S104 : performing a pre-pressing operation and a main pressing operation on the second bearing to fix the solid lubricant in the groove array, thereby preparing an anti-friction bearing.

[0069] The method for preparing the anti-friction bearing prepares a groove array composed of multiple cross-sectional curve grooves corresponding to the cross-sectional curve on the inner peripheral surface of a preset first bearing, and fixes a solid lubricant in the groove array through a pre-pressing operation and a main pressing operation to prepare the anti-friction bearing. The method solves the problem that traditional bearings have reduced load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions. The groove array formed by multiple wave-like cross-sectional curve grooves can reduce the friction coefficient of the anti-friction bearing and improve the wear resistance and reliability of the anti-friction bearing.

[0070] Specifically, in step S101, a surface contour scanning result of the bay scallop is obtained. The surface contour of the bay scallop is scanned by using existing three-dimensional scanning technology to obtain the surface contour scanning result of the bay scallop.

[0071] Before obtaining the surface profile scan results of the bay scallops, the bay scallops need to be ultrasonically cleaned with an anhydrous ethanol solution to remove surface oil stains on the bay scallops, including grease, oil, dirt, dust, scale, and polishing compounds. This will make the surface profile scan results of the bay scallops more consistent with the actual situation and avoid the impact of surface oil stains.

[0072] Specifically, in step S102, multiple sections of the surface profile of the bay scallop are intercepted from the surface profile scanning result to perform curve fitting on multiple position points of the multiple sections to obtain a wave-like cross-sectional curve, including:

[0073] intercepting arc sections of the bay scallop surface profile at different arc lengths multiple times from the surface profile scanning result in an arc-shaped manner to obtain a plurality of arc sections (i.e., intercepting the bay scallop surface profile along a plurality of arc-shaped paths with the bay scallop's sharp corner as the circle center to obtain a plurality of arc sections);

[0074] The positions of the points corresponding to the same center angle are extracted from each arc section, and the average position of each point is used as the position of the surface contour point of the bay scallop;

[0075] According to the positions of the surface contour position points, the surface contour position points are converted into equivalent position points on a two-dimensional plane to obtain the positions of the equivalent position points;

[0076] Based on the positions of the equivalent position points, curve fitting is performed on multiple equivalent position points to obtain a wave-like cross-sectional curve.

[0077] In step S102, the arc sections of the surface profile of the same bay scallop at different arc lengths are intercepted multiple times from the surface profile scanning result in an arc-shaped interception manner, such as Figure 3 As shown, a1, a2, and a3 are arc sections when the bay scallop is intercepted at different arc lengths in an arc-shaped manner, and c is the cusp point of the bay scallop. The positions of multiple position points corresponding to the same center angle (relative to the center angle of the cusp point c of the bay scallop) are extracted from the multiple intercepted arc sections, and the position average of the position points at the same angle of the multiple arc sections is calculated. The position average is determined as the position of the surface contour position point of the bay scallop, and the average value of the distance between each surface contour position point and the cusp point c is calculated as the equivalent radius. The center angle and equivalent radius corresponding to each surface contour position point are combined with the arc length calculation formula (the radian formula of the center angle is L=n×π×r / 180, L is the arc length, n is the center angle, and r is the equivalent radius) to calculate the corresponding arc length, which is used as the horizontal coordinate of the equivalent position point corresponding to the surface contour position point, and the height of each surface contour position point is used as the vertical coordinate of the corresponding equivalent position point. Curve fitting is performed through the equivalent position points to obtain a wave-like cross-sectional curve. Here, curve fitting is an existing technology and will not be described in detail here.

[0078] Among them, the expression of the cross-section curve is specifically:

[0079] ;

[0080] Among them, x is the horizontal coordinate (when processed into a cross-sectional curve groove, it is the axial coordinate, that is, the coordinate along the direction of the central axis of the bearing body 1), and y is the vertical coordinate (when processed into a cross-sectional curve groove, it is the circumferential coordinate, that is, the coordinate along the inner circumference of the bearing body 1).

[0081] In some embodiments, a straight line interception method can be used to intercept the two-dimensional cross-sections of the surface profile of the same bay scallop at different positions multiple times from the surface profile scanning results, such as Figure 4As shown, b1, b2, b3, and b4 are two-dimensional sections taken at different positions of the bay scallop in a straight line interception manner, c is the sharp corner point of the bay scallop, and the positions of multiple position points corresponding to the same center angle (the angle relative to the sharp corner point c of the bay scallop) are extracted from the multiple intercepted two-dimensional sections. The position average of the position points corresponding to the same center angle is calculated, and the position average is determined as the surface contour position point of the bay scallop. Curve fitting is performed through the surface contour position points to obtain a wave-like cross-sectional curve.

[0082] In other embodiments, the cross-sectional curve may be obtained in advance, so that step S101 and step S102 are correspondingly replaced by: obtaining a preset cross-sectional curve constructed based on the surface contour of the bay scallop.

[0083] Specifically, in step S103, a plurality of cross-sectional curve grooves corresponding to the cross-sectional curves are prepared on the inner circumference of the preset first bearing by using existing technology (such as laser technology or CNC machine tool technology), so as to obtain a second bearing having an inner circumference prepared with a groove array consisting of a plurality of cross-sectional curve grooves with equal relative distances, and the plurality of cross-sectional curves are evenly distributed along the inner circumference in the form of grooves (such as Figure 1 shown).

[0084] Specifically, in step S104, a pre-pressing operation and a main pressing operation (using an extrusion die for extrusion) are performed on the second bearing to fix the solid lubricant in the groove array to prepare an anti-friction bearing, including:

[0085] Cleaning the surface of the second bearing to remove surface impurities generated when preparing the groove array;

[0086] Using self-lubricating filling technology, the second bearing is pre-pressed to uniformly fill the groove array with solid lubricant to obtain a third bearing;

[0087] The third bearing is fixed in a preset extrusion die, and the extrusion die with the third bearing fixed is heated and then naturally cooled to obtain an anti-friction bearing with solid lubricant fixed in the groove array.

[0088] In step S104, the second bearing is polished using SiC sandpaper to remove surface burrs generated when the groove array is prepared. The polished second bearing is then immersed in anhydrous ethanol and ultrasonically cleaned to remove impurities such as oil.

[0089] Specifically, in step S104, a self-lubricating filling technology is used to pre-press the second bearing to uniformly fill the groove array with solid lubricant to obtain a third bearing, including:

[0090] placing the second bearing in a vacuum adsorption device;

[0091] Using a vacuum adsorption device, evacuating the second bearing, while simultaneously inputting lubricant into the groove array so that the lubricant is mixed into the groove array;

[0092] After the lubricant is mixed into the groove array, the vacuum operation is maintained and a pre-pressing tool with a smooth and flat surface is used to pre-press the second bearing so that the lubricant is evenly filled in the groove array to obtain a third bearing.

[0093] In step S104, the second bearing is vacuumed by using a pre-prepared vacuum adsorption device to a vacuum pressure of 10 -3 Torr or more, in a vacuum environment, gradually input lubricant (such as a solid lubricant made of molybdenum disulfide, graphite, calcium fluoride or hexagonal boron nitride) into the groove array to allow the lubricant to penetrate into the groove array.

[0094] After the lubricant has been incorporated into the groove array, continue to maintain the vacuum environment and pre-press the second bearing using a pre-pressing tool with a smooth and flat surface (such as stainless steel) to evenly fill the groove array with lubricant, thus forming the third bearing. The shape of the pre-pressing tool can be customized according to actual needs, but the surface must be smooth and flat.

[0095] Specifically, in step S104, the third bearing is fixed in a preset extrusion die, and the extrusion die with the third bearing fixed therein is heated and then naturally cooled to obtain an anti-friction bearing in which a solid lubricant is fixed in the groove array, including:

[0096] Fixing the third bearing in a preset extrusion die and extruding it to obtain a bearing module;

[0097] While maintaining the vacuum environment, the bearing module is heated according to the preset heating temperature and the preset heating time;

[0098] After the heating is completed, the bearing is naturally cooled to room temperature to obtain an anti-friction bearing in which the solid lubricant is fixed in the groove array.

[0099] In step S104, the third bearing is placed in an extrusion mold, and a non-stick paper soaked in a low-energy solution (such as perfluorodecyltrichlorosilane solution, octadecyltrichlorosilane solution, perfluorodecyltriethoxysilane solution, polydimethylsiloxane solution, etc.) is placed on the surface of the third bearing. The upper disk of the extrusion mold is aligned with the center hole of the third bearing for installation, and the nut on the extrusion mold is tightened with a wrench to extrude the third bearing and fix the position of the third bearing to obtain a bearing module (i.e., an extrusion mold with the third bearing fixed thereon). The bearing module is placed in a heating device that has been preheated to a preset heating temperature in advance. According to the preset heating temperature and the preset heating time, a vacuum environment is maintained and the bearing module is heated to ensure that no new bubbles and pores are generated during the heating process. After the preset heating time, it is naturally cooled to room temperature to obtain an anti-friction bearing with a solid lubricant fixed in a groove array. The preset heating temperature and the preset heating time can be set according to actual needs. The heating temperature is generally set to 100°C-300°C (preferably 200°C), and the heating time is generally set to 20 minutes-1 hour (preferably 20 minutes).

[0100] After the anti-friction bearings were prepared, liners made of different materials were first fixed to the bearings (including anti-friction bearings and ordinary bearings without cross-sectional curves). The friction coefficients of the anti-friction bearings and ordinary bearings were then compared to determine whether the anti-friction bearings had a good anti-friction effect. The specific comparison results are shown in the following table:

[0101] Sample number liner Bearing type Lubrication conditions Average friction coefficient S1 Polishing GCr15 Polishing GCr15 dry friction 0.513 S2 Polishing GCr15 Groove array dry friction 0.356 S3 Polishing GCr15 Groove array Nano-molybdenum dioxide 0.193 S4 Smooth PTFE liner Polishing GCr15 dry friction 0.273 S5 Smooth PTFE liner Polishing GCr15 Nano-molybdenum dioxide 0.221 S6 Smooth PTFE liner Groove array dry friction 0.174 S7 Smooth PTFE liner Groove array Nano-molybdenum dioxide 0.136

[0102] Among the bearing types, Polished GCr15 refers to a bearing with a smooth inner circumference without cross-sectional curves (or groove arrays), Array Grooves refers to a bearing with multiple grooves with cross-sectional curves on the inner circumference, and Smooth PTFE Liners refer to polytetrafluoroethylene gaskets. Regarding lubrication conditions, Dry Friction refers to the absence of a lubricant, while Nano Molybdenum Dioxide refers to the presence of a lubricant made of nano Molybdenum Dioxide. As can be seen from the table above, bearings with multiple grooves with cross-sectional curves (groove arrays) have a lower coefficient of friction than ordinary bearings, achieving excellent friction reduction.

[0103] From the above, it can be seen that the preparation method of the anti-friction bearing obtains the surface profile scanning results of the bay scallop, and repeatedly intercepts the cross-section of the surface profile of the bay scallop from the surface profile scanning results to perform curve fitting on multiple position points of the multiple cross-sections to obtain a wave-like cross-sectional curve, and prepares multiple cross-sectional curve grooves corresponding to the cross-sectional curve on the inner circumference of the preset first bearing to obtain a second bearing having an inner circumference prepared with a groove array consisting of multiple cross-sectional curve grooves with equal relative distances, and performs pre-pressing operation and main pressing operation on the second bearing to fix the solid lubricant in the groove array to prepare an anti-friction bearing; thus, through the corresponding anti-friction bearing preparation method, an anti-friction bearing having an inner circumference provided with a groove array consisting of multiple cross-sectional curves with equal relative distances is prepared, which solves the problem that traditional bearings reduce their load-bearing capacity and wear resistance under extreme conditions and affect their service life and reliability under high load conditions, and can reduce the friction coefficient of the anti-friction bearing through the groove array formed by multiple wave-like cross-sectional curve grooves, thereby improving the wear resistance and reliability of the anti-friction bearing.

[0104] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0105] In addition, the units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, and may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution of this embodiment.

[0106] Furthermore, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0107] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0108] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An anti-friction bearing, It is characterized in that It comprises a bearing body (1) and a groove array (2) arranged on the inner circumferential surface of the bearing body (1); The groove array (2) is used to reduce the friction coefficient of the anti-friction bearing and improve the wear resistance of the anti-friction bearing; the groove array (2) is provided with a plurality of wave-like cross-sectional curve grooves (3), the plurality of cross-sectional curve grooves (3) are evenly distributed along the inner circumferential surface of the bearing body (1), the distance between two adjacent cross-sectional curve grooves (3) along the circumferential surface of the bearing body (1) is equal, and each cross-sectional curve groove (3) is provided with a solid lubricant; The cross-sectional curved groove (3) is manufactured based on the surface contour of the bay scallop; The cross-sectional curve expression corresponding to the cross-sectional curve groove (3) is specifically: ； Among them, x is the axial coordinate and y is the circumferential coordinate.

2. The antifriction bearing according to claim 1, It is characterized in that The bearing body (1) is made of a single metal or an alloy metal.

3. The antifriction bearing according to claim 2, It is characterized in that The depth of the cross-sectional curve groove (3) is 10-50 μm, and the width of the cross-sectional curve groove (3) is 60-120 μm.

4. A method for preparing an anti-friction bearing, for preparing the anti-friction bearing according to claim 1, It is characterized in that include: Get a scan of the surface profile of a bay scallop; Cutting out sections of the surface profile of the bay scallop multiple times from the surface profile scanning result, so as to perform curve fitting on multiple position points of the multiple sections, and obtain a cross-sectional curve with a wave-like shape; A plurality of cross-sectional curve grooves corresponding to the cross-sectional curve are prepared on the inner circumference of the preset first bearing, so as to obtain a second bearing having an inner circumference with a groove array composed of a plurality of cross-sectional curve grooves with equal relative distances; The second bearing is subjected to a pre-pressing operation and a main pressing operation to fix the solid lubricant in the groove array, thereby preparing an anti-friction bearing.

5. The method for preparing the antifriction bearing according to claim 4, It is characterized in that The cross sections of the surface profile of the bay scallop are intercepted multiple times from the surface profile scanning result to perform curve fitting on multiple position points of the cross sections to obtain a cross-sectional curve with a wave-like shape, including: In an arc-shaped interception manner, arc sections of the surface contour of the bay scallop at different arc lengths are intercepted multiple times from the surface contour scanning result to obtain multiple arc sections; Extracting the positions of the position points corresponding to the same center angle from each of the circular arc cross sections, and taking the position average of each of the position points as the position of the surface contour position point of the bay scallop; According to the position of the surface contour position point, the surface contour position point is converted into an equivalent position point on a two-dimensional plane to obtain the position of the equivalent position point; Based on the positions of the equivalent position points, curve fitting is performed on a plurality of the equivalent position points to obtain a cross-sectional curve in a wave-like shape.

6. The method for preparing the antifriction bearing according to claim 4, It is characterized in that The second bearing is subjected to a pre-pressing operation and a main pressing operation to fix the solid lubricant in the groove array to prepare an anti-friction bearing, comprising: Cleaning the surface of the second bearing to remove surface impurities generated when preparing the groove array; Using a self-lubricating filling technology, pre-pressing the second bearing to uniformly fill the groove array with solid lubricant to obtain a third bearing; The third bearing is fixed in a preset extrusion die, and the extrusion die with the third bearing fixed is heated and then naturally cooled to obtain an anti-friction bearing in which the solid lubricant is fixed in the groove array.

7. The method for preparing the antifriction bearing according to claim 6, It is characterized in that The second bearing is pre-pressed by using a self-lubricating filling technology to uniformly fill the solid lubricant in the groove array to obtain a third bearing, comprising: placing the second bearing in a vacuum adsorption device; Using the vacuum adsorption device to evacuate the second bearing, while inputting lubricant into the groove array, so that the solid lubricant is mixed into the groove array; After the solid lubricant is incorporated into the groove array, the vacuum operation is maintained, and a pre-pressing tool with a smooth and flat surface is used to pre-press the second bearing so that the solid lubricant is evenly filled in the groove array to obtain a third bearing.

8. The method for preparing the antifriction bearing according to claim 6, It is characterized in that The third bearing is fixed in a preset extrusion die, and the extrusion die with the third bearing fixed is heated and then naturally cooled to obtain an anti-friction bearing with the solid lubricant fixed in the groove array, comprising: Fixing the third bearing in a preset extrusion die for extrusion to obtain a bearing module; While maintaining the vacuum environment, heating the bearing module according to a preset heating temperature and a preset heating time; After the heating is completed, the mixture is naturally cooled to room temperature to obtain an anti-friction bearing in which the solid lubricant is fixed in the groove array.

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