Tapered roller bearings, wind turbine generator sets, and manufacturing methods of tapered roller bearings.

Abstract

This application discloses a tapered roller bearing, a wind turbine generator set, and a method for manufacturing the tapered roller bearing. The tapered roller bearing includes a cage and a plurality of rolling elements rotatably mounted on the cage. The cage includes a first ring and a second ring arranged coaxially, and a plurality of beams connecting the first ring and the second ring. A pocket for accommodating the rolling elements is formed between any two adjacent beams. The sidewalls of the beams forming the pockets are curved, and the curvature of the curved surface is less than the surface curvature of the rolling elements. This arrangement increases the contact area between the beams and the rolling elements in the pockets, thereby reducing the pressure between the beams and the rolling elements, improving lubrication, helping to mitigate friction between the beams and the rolling elements, reducing wear caused by friction, improving the wear resistance of the tapered roller bearing, maintaining the structural integrity of the beams and rolling elements, reducing the movement of the cage, and maintaining the structural stability of the tapered roller bearing.

Description

Technical Field

[0001] This application relates to the field of bearing technology, and in particular to a tapered roller bearing, a wind turbine generator set, and a method for manufacturing a tapered roller bearing. Background Technology

[0002] Tapered roller bearings typically consist of an inner ring, an outer ring fitted around the outer circumference of the inner ring, a cage sandwiched between the inner and outer rings, and multiple rolling elements (rollers) rotatably mounted on the cage. During operation, tapered roller bearings need to withstand large loads, and the intense internal friction easily leads to wear on the rolling elements and cage, causing bearing failure. Therefore, improving the structural design of tapered roller bearings and enhancing their wear resistance is an important research topic in this field. Summary of the Invention

[0003] The purpose of this application is to provide a tapered roller bearing, a wind turbine generator set, and a method for manufacturing tapered roller bearings, which can improve the wear resistance of tapered roller bearings, reduce their internal wear, and help improve the stability of tapered roller bearings.

[0004] To solve the above-mentioned technical problems, the first aspect of this application provides a tapered roller bearing, comprising: Multiple rolling elements; A cage includes a first ring portion, a second ring portion coaxially arranged with the first ring portion, and a plurality of beams connecting the first ring portion and the second ring portion. The outer diameter of the first ring portion is larger than the outer diameter of the second ring portion. The plurality of beams are arranged circumferentially around the second ring portion. A pocket is formed between any two adjacent beams. The rolling element is correspondingly disposed in the pocket and is rotatable relative to the first ring portion and the second ring portion. The sidewall of the beam facing the rolling element has a curved surface, and the curvature of the curved surface is less than the surface curvature of the rolling element.

[0005] The tapered roller bearing disclosed in this application includes a cage and a plurality of rolling elements rotatably mounted on the cage. The cage includes a first ring portion and a second ring portion arranged coaxially, and a plurality of beams connecting the first ring portion and the second ring portion. A pocket for accommodating the rolling elements is formed between any two adjacent beams. The sidewalls of the beams forming the pockets are provided with curved surfaces, and the curvature of the curved surfaces is less than the surface curvature of the rolling elements. This arrangement increases the contact area between the beams and the rolling elements disposed in the pockets, thereby reducing the pressure between the beams and the rolling elements, improving lubrication, helping to mitigate friction between the beams and the rolling elements, reducing wear caused by friction, improving the wear resistance of the tapered roller bearing, maintaining the structural integrity of the beams and rolling elements, reducing the amount of cage movement, and maintaining the structural stability of the tapered roller bearing.

[0006] Optionally, the ratio of the surface curvature of the rolling element to the curvature of the curved surface is K, and K satisfies the relationship: K≥1.02.

[0007] Optionally, the beam has the curved surface on both side walls in the circumferential direction of the first ring portion.

[0008] Optionally, the curved surface includes a first sub-surface and a second sub-surface, which are arranged at intervals along the extension direction of the beam.

[0009] Optionally, the curved surface is provided with a wear-resistant layer.

[0010] Optionally, the wear-resistant layer is a molybdenum disulfide layer.

[0011] Optionally, the cage further includes a phosphide layer covering the surfaces of the first ring portion, the second ring portion, and the plurality of beams.

[0012] A second aspect of this application provides a wind turbine generator that includes the tapered roller bearing described in the first aspect.

[0013] A third aspect of this application also provides a method for manufacturing a tapered roller bearing, comprising: A cage and a plurality of rolling elements are provided. The cage includes a first ring portion, a second ring portion arranged coaxially with the first ring portion, and a plurality of beams connecting the first ring portion and the second ring portion. The outer diameter of the first ring portion is larger than the outer diameter of the second ring portion. The plurality of beams are arranged circumferentially around the second ring portion, and a pocket is formed between any two adjacent beams. A curved surface is provided on the side wall of the beam along the circumferential direction of the first ring portion, and the curvature of the curved surface is less than the surface curvature of the rolling element; The plurality of the rolling elements are rotatably inserted into the pocket.

[0014] Optionally, before rotatably inserting the plurality of rolling elements into the pocket, the method further includes: A wear-resistant layer is provided on the curved surface.

[0015] Optionally, the provision of a wear-resistant layer on the curved surface specifically includes: The curved surface is coated with a molybdenum disulfide coating and cured at a temperature not exceeding 100°C.

[0016] Optionally, the molybdenum disulfide coating includes molybdenum disulfide and a high-temperature stabilizer.

[0017] The tapered roller bearing of this application has at least the following advantages over the prior art: The tapered roller bearing of this application has a curved surface on the side wall of the beam forming the pocket, and the curvature of the curved surface is less than the surface curvature of the rolling element. This configuration increases the contact area between the beam and the rolling element, thereby reducing the pressure between them, improving lubrication, helping to mitigate friction between them, reducing wear caused by friction, improving the wear resistance of the tapered roller bearing, maintaining the structural integrity of the beam and rolling element, reducing cage movement, and maintaining the structural stability of the tapered roller bearing. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the tapered tube bearing in an embodiment of this application; Figure 2 This is a schematic diagram of the cage structure in an embodiment of this application; Figure 3 yes Figure 2 Enlarged view of region A in the middle; Figure 4 yes Figure 2 A schematic diagram of the cage beam structure shown; Figure 5 yes Figure 4 A schematic cross-sectional view of the beam along the B-B' direction; Figure 6 This is one method for manufacturing a tapered roller bearing in the embodiments of this application; Figure 7 This is another method for manufacturing tapered roller bearings in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures 1. Tapered roller bearing; 11. Cage; 111. First ring; 112. Second ring; 113. Beam; 113a. Pocket; 113b. First groove; 113c. Second groove; 1131. Curved surface; 1132. First sub-surface; 1133. Second sub-surface; 1134. Boss; 1135. Wear-resistant layer; 12. Rolling element. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0022] In the embodiments of this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "opening," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The internal components of tapered roller bearings experience significant friction during use, which can easily lead to wear of the internal structure, reducing structural stability and potentially causing functional failure. Currently, to reduce friction and wear, lubricating oil or grease is typically injected into the bearing to lubricate the rolling elements (rollers). Therefore, the main methods for improving the wear resistance of tapered roller bearings are through structural design that allows lubricating oil to enter the bearing more easily, extends the retention time of the lubricating oil inside, or adds oil reservoirs within the bearing. These methods ensure that the lubricating oil can lubricate the rolling elements for an extended period. The core of these designs is to increase the lubrication rate of the lubricating oil on the rolling elements. However, the design did not optimize for the wear resistance of the tapered roller bearing structure itself. When the tapered roller bearing is short of oil under certain conditions or is subjected to a large load, the structure of the tapered roller bearing itself is easily worn and fails under the action of friction, causing the equipment equipped with the tapered roller bearing to fail to operate normally.

[0027] To address the aforementioned technical problems, embodiments of this application provide a tapered roller bearing, a wind turbine generator set, and a method for manufacturing the tapered roller bearing. This method increases the contact area between the beam and the rolling elements housed in the pocket, thereby reducing the pressure between the beam and the rolling elements. Simultaneously, it improves lubrication, helps to mitigate friction between the beam and the rolling elements, reduces wear caused by friction, enhances the wear resistance of the tapered roller bearing, maintains the structural integrity of the beam and the rolling elements, reduces cage movement, and maintains the structural stability of the tapered roller bearing. Therefore, the tapered roller bearing of this embodiment directly improves its structural wear resistance through structural design improvements.

[0028] The following details the implementation of the tapered roller bearing, wind turbine, and tapered roller bearing manufacturing method of this embodiment. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0029] Please see also Figures 1 to 5 , Figure 1 This is a schematic diagram of the tapered tube bearing in an embodiment of this application. Figure 2 This is a schematic diagram of the cage structure in an embodiment of this application. Figure 3 yes Figure 2 Enlarged diagram of region A in the middle. Figure 4 yes Figure 2 The diagram shows the structural design of the cage beam. Figure 5 yes Figure 4 A schematic cross-sectional view of the beam along the B-B' direction.

[0030] The tapered roller bearing 1 of the first aspect of this embodiment includes a cage 11 and a plurality of rolling elements 12. The cage 11 includes a first ring portion 111, a second ring portion 112, and a plurality of beams 113. The outer diameter of the first ring portion 111 is larger than the outer diameter of the second ring portion 112, and the first ring portion 111 and the second ring portion 112 are arranged coaxially. The plurality of beams 113 are all connected between the first ring portion 111 and the second ring portion 112, and the plurality of beams 113 are arranged at intervals along the circumference of the second ring portion 112. A pocket 113a is formed between any two adjacent beams 113, and the rolling elements 12 are correspondingly disposed in the pockets 113a, and the rolling elements 12 are rotatable relative to the first ring portion 111 and the second ring portion 112. The sidewalls of the beams 113 facing the rolling elements 12 are provided with curved surfaces 1131, and the curvature of the curved surfaces 1131 is less than the surface curvature of the rolling elements 12.

[0031] This design increases the contact area between the beam 113 and the rolling element 12 located in the pocket 113a, reducing contact stress and thus decreasing the pressure between the beam 113 and the rolling element 12. This helps to mitigate friction between the beam 113 and the rolling element 12, reducing the wear effect caused by particle crushing, and decreasing wear caused by friction, thereby improving the wear resistance of the tapered roller bearing 1. Under the same wear volume, the larger wear area significantly reduces the wear depth, maintains the structural integrity of the beam 113 and the rolling element 12, reduces the movement of the cage 11, and maintains the structural stability of the tapered roller bearing 1. Simultaneously, the lubricating oil entering the tapered roller bearing 1 can better form a lubricating oil film at the curved surface 1131, improving lubrication and reducing wear.

[0032] It is understandable that the curvature of surface 1131 is less than the surface curvature of rolling element 12, indicating that the radius of curvature of surface 1131 is greater than the radius of curvature of rolling element 12. In this way, when rolling element 12 is assembled in pocket 113a, the friction between rolling element 12 and beam 113 can be reduced, and rolling element 12 can rotate better relative to cage 11.

[0033] It should be noted that the rotation axis of the rolling element 12 is set at an angle to the axes of the first ring portion 111 and the second ring portion 112, and the two ends of the rolling element 12 on its own rotation axis are rotatably connected to the first ring portion 111 and the second ring portion 112, respectively. The outer contour of the cage 11 is frustum-shaped, the rolling element 12 is usually a cylinder, or a frustum (i.e., with a conical surface), and the generatrix of the rolling element 12 contacts the curved surface 1131.

[0034] In some embodiments, the curved surface 1131 is recessed in a direction away from the rolling element 12 to form a receiving space in which a portion of the rolling element 12 is located. That is, the rolling element 12 and the beam 113 are nested together.

[0035] Optionally, surface 1131 can be a conical surface, cylindrical surface, elliptical cylindrical surface, parabolic surface, etc. The specific surface shape can be selected and set according to actual needs. The following description uses a cylindrical surface as an example for surface 1131, but it should be noted that the following content only applies to this example.

[0036] In some embodiments, the ratio of the surface curvature of the rolling element 12 to the curvature of the curved surface 1131 is K, and K satisfies the relationship: K ≥ 1.02. Within this range, it can be ensured that the radius of curvature of the curved surface 1131 is greater than the radius of curvature of the surface of the rolling element 12, ensuring that there is no sharp edge contact between the rolling element 12 and the curved surface 1131, thereby reducing the pressure between the rolling element 12 and the curved surface 1131 when they come into contact, and reducing the wear caused by friction between the rolling element 12 and the curved surface 1131. If K < 1.02, the difference in the radius of curvature between the curved surface 1131 and the rolling element 12 is small, which may be detrimental to the insertion of the rolling element 12 into the cage 11, and makes the cage 11 more likely to interfere with the rolling element 12, affecting the free rotation of the rolling element 12.

[0037] In some embodiments, K also satisfies the relation: K ≤ 4. For example, K can be 1.02, 1.04, 1.06, 1.08, 1.1, 1.12, 1.14, 1.16, 1.18, 1.2, 1.22, 1.24, 1.26, 1.28, 1.3, 1.32, 1.34, 1.36, 1.38, 1.4, 1.42, 1.44, 1.46, 1.48, 1.5, 1.52, 1.54, 1.56, 1.58, 1.6, 1.62, 1.64, 1.66, 1.68, 1.7, 1.72, 1.7 4, 1.76, 1.78, 1.8, 1.82, 1.84, 1.86, 1.88, 1.9, 1.92, 1.94, 1.96, 1.98, 2, 2.02, 2.04, 2.06, 2.08, 2.1, 2.12, 2.14, 2.16, 2.18, 2.2, 2.22, 2.24, 2.26, 2.28, 2.3, 2.32, 2.34, 2.36, 2.38, 2.4, 2.42, 2.44, 2.46, 2.48, 2.5, 2 0.52, 2.54, 2.56, 2.58, 2.6, 2.62, 2.64, 2.66, 2.68, 2.7, 2.72, 2.74, 2.76, 2.78, 2.8, 2.82, 2.84, 2.86, 2.88, 2.9, 2.92, 2.94, 2.96, 2.98, 3, 3.02, 3.04, 3.06, 3.08, 3.1, 3.12, 3.14, 3.16, 3.18, 3.2, 3.22, 3.24, 3.26, 3.2 8, 3.3, 3.32, 3.34, 3.36, 3.38, 3.4, 3.42, 3.44, 3.46, 3.48, 3.5, 3.52, 3.54, 3.56, 3.58, 3.6, 3.62, 3.64, 3.66, 3.68, 3.7, 3.72, 3.74, 3.76, 3.78, 3.8, 3.82, 3.84, 3.86, 3.88, 3.9, 3.92, 3.94, 3.96, 3.98, 4, or other values ​​within this range. Within this range, the curvature ratio between the curved surface 1131 and the rolling element 12 is appropriate, which can ensure a large contact area between the two, reduce the pressure between them, reduce wear, reduce the difficulty of assembling the rolling element 12 into the cage 11, and use the cage 11 to achieve appropriate constraint on the rolling element 12.

[0038] In some embodiments, the beam 113 has curved surfaces 1131 on both sidewalls of the first ring portion 111 in the circumferential direction. In other words, in the circumferential direction of the first ring portion 111, any beam 113 and its adjacent beams 113 on opposite sides form two adjacent pockets 113a, and each pocket 113a is provided with a rolling element 12. At this time, the beam 113 located between the two rolling elements 12 has curved surfaces 1131 on its two opposite sidewalls in the circumferential direction of the first ring portion 111, respectively, to cooperate with the corresponding rolling element 12. It can be understood that the curved surfaces on the two sidewalls of any beam 113 satisfy the constraint relationship of K≥1.02 mentioned above.

[0039] In some embodiments, the curved surface 1131 includes a first sub-surface 1132 and a second sub-surface 1133, and the first sub-surface 1132 and the second sub-surface 1133 are arranged at intervals in the extending direction of the beam 113. Thus, in the axial direction of the rolling element 12, both ends of the rolling element 12 can respectively correspond to the first sub-surface 1132 and the second sub-surface 1133, so that both ends of the rolling element 12 can receive surface support, reducing the pressure on both ends of the rolling element 12 and reducing wear. It is understood that any beam 113 has a first sub-surface 1132 and a second sub-surface 1133 on both sidewalls in the circumferential direction of the first ring portion 111.

[0040] In other embodiments, the sidewalls of the beam 113 in the axial direction of the first ring portion 111 can be constructed to form a complete curved surface 1131, that is, the curved surface 1131 has no interval in the extension direction of the beam 113.

[0041] The following description uses the example of surface 1131 including a spaced first sub-surface 1132 and a second sub-surface 1133, but it is not intended to be limited to this example.

[0042] In some embodiments, beam 113 is provided with a boss 1134 at a position corresponding to the first sub-surface 1132 and the second sub-surface 1133. The boss 1134 protrudes toward the rolling element 12, and the sidewall of the boss 1134 facing the rolling element 12 is provided with the first sub-surface 1132 or the second sub-surface 1133. By providing the boss 1134, the contact area between the rolling element 12 and the cage 11 can be increased, while a gap can be formed between the rolling element 12 and beam 113. This facilitates the entry of lubricating oil from the gap into the interior of the cage 11 to lubricate the rolling element 12, further reducing the friction experienced by the rolling element 12 when rotating relative to the cage 11. It can be understood that beam 113 is provided with two bosses 1134 on one sidewall in the circumferential direction of the first ring portion 111, and the two bosses 1134 are respectively provided corresponding to the first sub-surface 1132 and the second sub-surface 1133.

[0043] In some embodiments, in the extending direction of the beam 113, the boss 1134, the first ring portion 111, and the second ring portion 112 are all spaced apart, such that a first groove 113b is formed between the boss 1134 adjacent to the first ring portion 111 and the first ring portion 111, and a second groove 113c is formed between the boss 1134 adjacent to the second ring portion 112. Lubricating oil from the outside of the cage 11 can enter the interior of the cage 11 through the first groove 113b and the second groove 113c. Simultaneously, the first groove 113b and the second groove 113c can store a small amount of lubricating oil, maintaining long-term lubrication inside the tapered roller bearing 1.

[0044] In some embodiments, the cage 11 further includes a phosphate layer (not shown) covering the entire surface of the cage 11, that is, covering the surfaces of the first ring portion 111, the second ring portion 112, and the beam 113. Specifically, a phosphate conversion film (phosphating film) can be formed on the surface of the cage 11 through chemical and electrochemical reactions. The phosphate film can improve the lubrication performance of the cage 11 surface, reduce the friction between the cage 11 and the rolling elements 12, and thus improve the wear resistance of the tapered roller bearing 1.

[0045] Optionally, the phosphide layer can be a zinc-based phosphide, a manganese-based phosphide, an iron-based phosphide, etc., and this embodiment does not specifically limit it.

[0046] In some embodiments, the curved surface 1131 may be provided with a wear-resistant layer 1135. By providing the wear-resistant layer 1135, the wear resistance of the curved surface 1131 can be improved, and the curved surface 1131 can be prevented from being worn by the friction of the rolling element 12.

[0047] Understandably, since the beam 113 contacts the rolling element through the first sub-surface 1132 and the second sub-surface 1133, the wear-resistant layer 1135 can be provided on the first sub-surface 1132 and the second sub-surface 1133, while the rest of the beam 113 does not need to have the wear-resistant layer 1135. In this way, the targeted provision of the wear-resistant layer 1135 can not only improve the wear resistance of the cage 11, but also reduce the material consumption for making the wear-resistant layer 1135, thereby reducing the manufacturing cost of the cage 11.

[0048] In some embodiments, the wear-resistant layer 1135 is a molybdenum disulfide layer. Molybdenum disulfide has a low coefficient of friction (0.03-0.09) and a high melting point (1185°C), exhibiting good stability and lubrication performance under high and low temperatures, high loads, and high speeds. This helps improve the lubrication effect between the cage 11 and the rolling elements 12, enhances the wear resistance of the cage 11, and reduces wear caused by friction between the cage 11 and the rolling elements 12.

[0049] In some embodiments, the cage 11 may simultaneously have the aforementioned phosphide layer and wear-resistant layer 1135. Specifically, a phosphide layer may first be formed on the entire outer surface of the cage 11, and then the wear-resistant layer 1135 may be formed on the first sub-surface 1132 and the second sub-surface 1133. This configuration allows for the formation of a phosphide-molybdenum disulfide composite coating on the cage 11, significantly improving the wear resistance of the cage 11.

[0050] In simulated tests, under oil-deficient conditions, the improved design of this embodiment doubles the contact area for a 150mm diameter rolling element, reduces the maximum pressure on the rolling element 12 by 50%, and reduces the wear depth by 50% for the same wear volume. The impact on the movement of the cage 11 is significantly reduced.

[0051] Please see also Figure 6 and Figure 7 , Figure 6 This is one method for manufacturing a tapered roller bearing according to an embodiment of this application. Figure 7 This is another method for manufacturing tapered roller bearings in the embodiments of this application.

[0052] The second aspect of this embodiment provides a method for manufacturing a tapered roller bearing for producing the tapered roller bearing 1 described in the first aspect. The method includes: S1. A cage 11 and a plurality of rolling elements 12 are provided. The cage 11 includes a first ring portion 111, a second ring portion 112 arranged coaxially with the first ring portion 111, and a plurality of beams 113 connected between the first ring portion 111 and the second ring portion 112. The outer diameter of the first ring portion 111 is larger than the outer diameter of the second ring portion 112. The plurality of beams 113 are arranged circumferentially at intervals along the second ring portion 112. A pocket 113a is formed between any two adjacent beams 113.

[0053] S2. A curved surface 1131 is provided on the side of the beam 113 along the circumferential direction of the first ring portion 111, and the curvature of the curved surface 1131 is less than the surface curvature of the rolling element 12.

[0054] S3. The multiple rolling elements 12 are rotatably placed into the pocket 113a.

[0055] For step S2, specifically, the surface 1131 and the rolling element 12 are set such that the ratio of the surface curvature of the rolling element 12 to the surface curvature of the surface 1131 is K≥1.02.

[0056] More specifically, based on satisfying the above ratio relationship, the above curved surface 1131 is provided on the two side walls of the beam 113 that are set opposite to each other in the circumference of the first ring 111.

[0057] In some embodiments, the curved surface 1131 may be configured as a first sub-surface 1132 and a second sub-surface 1133 spaced apart in the extension direction of the beam 113.

[0058] In some embodiments, two bosses 1134 may be formed on one side wall of the beam 113, the two bosses 1134 being arranged at intervals in the extending direction of the beam 113, and a first sub-surface 1131 and a second sub-surface 1133 being respectively disposed on the two bosses 1134.

[0059] In some embodiments, the boss 1134 may be arranged at intervals with the first ring portion 111 and the second ring portion 112 in the extending direction of the beam 113 to form a groove.

[0060] In some embodiments, before performing step S3, step S21 can be performed first to form a phosphide layer on the entire surface of the cage 11. By forming a phosphide layer on the surface of the cage 11, the lubricity of the entire surface of the cage 11 can be improved, and the friction between the cage 11 and the rolling element 12 can be reduced.

[0061] In some embodiments, before performing step S3, step S22 can be performed first to set a wear-resistant layer 1135 on the curved surface 1131. By setting the wear-resistant layer 1135, the wear resistance of the beam 113 at the first sub-surface 1132 and the second sub-surface 1133 can be improved, the lubricity of the corresponding area can be improved, and the wear caused by friction between the beam 113 and the rolling element 12 can be reduced.

[0062] For step S22, specifically, a molybdenum disulfide coating is applied to the area corresponding to the curved surface 1131, and the molybdenum disulfide coating is cured at a temperature not exceeding 100°C. For example, it can be cured at temperatures of 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C, 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C, 68°C, 69°C, 70°C, 7... 1℃, 72℃, 73℃, 74℃, 75℃, 76℃, 77℃, 78℃, 79℃, 80℃, 81℃, 82℃, 83℃, 84℃, 85℃, 86℃, 87℃, 88℃, 89℃, 90℃, 91℃, 92℃, 93℃, 94℃, 95℃, 96℃, 97℃, 98℃, 99℃, 100℃ or other embodiments within this range.

[0063] More specifically, during low-temperature curing, a coil can be used to encircle the area corresponding to the curved surface 1131 on the beam 113. By energizing the coil, localized heating and curing can be achieved through eddy current heating, eliminating the need for large-scale curing equipment. This reduces manufacturing costs and processing difficulty.

[0064] In some embodiments, the molybdenum disulfide coating includes molybdenum disulfide and a high-temperature stabilizer. This allows the cured molybdenum disulfide wear-resistant layer to remain stable at higher operating temperatures. Typically, during wind turbine operation, the internal structure of the tapered roller bearing 1 undergoes continuous relative movement and friction. Even with lubrication and cooling by the lubricating oil, its actual operating temperature may still exceed 180°C. Therefore, by adding a high-temperature stabilizer, the cured molybdenum disulfide coating can remain stable at higher operating temperatures.

[0065] Optionally, the high-temperature stabilizer can be sulfonated phenolic resin and its modified forms, chromates, sulfonated lignite modified forms, organic sulfonated polymers, or sulfhydryl-containing heterocyclic compounds. Alternatively, the high-temperature stabilizer can also be a mixture of aluminum salts (aluminum trichloride, aluminum sulfate, or alum) and fluorocarbon sulfonate polymers in a certain proportion, wherein the fluorocarbon sulfonate polymer is obtained by sulfonation of acrylic polymer emulsion, maleic acid monoester, and sodium sulfite.

[0066] In some embodiments, before performing step S3, step S21 can be performed first. After the surface phosphating of the cage 11 is completed, step S22 is then performed to improve the wear resistance of the area on the cage 11 that contacts the surface of the rolling element 12. In this way, the overall wear resistance of the cage 11 can be significantly improved, thereby improving the structural stability of the tapered roller bearing 1.

[0067] A third aspect of this embodiment also provides a wind turbine generator set, which includes the tapered roller bearing 1 described in the first aspect.

[0068] The tapered roller bearing, wind turbine, and manufacturing method of the tapered roller bearing provided by the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The above description of the embodiments is only for the purpose of helping to understand the ideas of this application. There may be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A tapered roller bearing, characterized in that, include: Multiple rolling elements; A cage includes a first ring portion, a second ring portion coaxially arranged with the first ring portion, and a plurality of beams connecting the first ring portion and the second ring portion. The outer diameter of the first ring portion is larger than the outer diameter of the second ring portion. The plurality of beams are arranged circumferentially around the second ring portion. A pocket is formed between any two adjacent beams. The rolling element is correspondingly disposed in the pocket and is rotatable relative to the first ring portion and the second ring portion. The sidewall of the beam facing the rolling element has a curved surface, and the curvature of the curved surface is less than the surface curvature of the rolling element.

2. The tapered roller bearing according to claim 1, characterized in that, The ratio of the surface curvature of the rolling element to the curvature of the curved surface is K, and K satisfies the relationship: K≥1.

02.

3. The tapered roller bearing according to claim 1, characterized in that, The beam has curved surfaces on both side walls in the circumferential direction of the first ring portion.

4. The tapered roller bearing according to claim 1, characterized in that, The curved surface includes a first sub-surface and a second sub-surface, which are arranged at intervals along the extension direction of the beam.

5. The tapered roller bearing according to claim 1, characterized in that, The curved surface is provided with a wear-resistant layer.

6. The tapered roller bearing according to claim 5, characterized in that, The wear-resistant layer is a molybdenum disulfide layer.

7. The tapered roller bearing according to any one of claims 1-6, characterized in that, The cage further includes a phosphide layer covering the surfaces of the first ring portion, the second ring portion, and the plurality of beams.

8. A wind turbine generator set, characterized in that, Including the tapered roller bearing as described in any one of claims 1-7.

9. A method for manufacturing a tapered roller bearing, characterized in that, include: A cage and a plurality of rolling elements are provided. The cage includes a first ring portion, a second ring portion arranged coaxially with the first ring portion, and a plurality of beams connecting the first ring portion and the second ring portion. The outer diameter of the first ring portion is larger than the outer diameter of the second ring portion. The plurality of beams are arranged circumferentially spaced along the second ring portion, and a pocket is formed between any two adjacent beams. A curved surface is provided on the side wall of the beam along the circumferential direction of the first ring portion, and the curvature of the curved surface is less than the surface curvature of the rolling element; The plurality of the rolling elements are rotatably inserted into the pocket.

10. The manufacturing method according to claim 9, characterized in that, Before rotatably inserting the plurality of rolling elements into the pocket, the method further includes: A wear-resistant layer is provided on the curved surface.

11. The manufacturing method according to claim 10, characterized in that, The provision of a wear-resistant layer on the curved surface specifically includes: The curved surface is coated with a molybdenum disulfide coating and cured at a temperature not exceeding 100°C.

12. The manufacturing method according to claim 11, characterized in that, The molybdenum disulfide coating comprises molybdenum disulfide and a high-temperature stabilizer.

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