High-strength low-friction retainer formed by high-pressure casting

Abstract

The high-strength low-friction retainer formed through high-pressure casting comprises a retainer body, the retainer body comprises two arc-shaped sections and a plurality of window beams connected with the two arc-shaped sections, window holes for containing rolling bodies are formed between the adjacent window beams, and the sides, away from the window holes, of the window beams located at the two ends of the retainer body are provided with inward concave faces. And the inner concave surfaces of the two adjacent retainer main bodies are oppositely arranged to form an oil accommodating gap, so that the oil storage space in the bearing is obviously increased. According to the retainer, sufficient lubricating oil is guaranteed between the rolling body and the retainer main bodies and between the retainer main bodies, more effective heat dissipation is further facilitated, the design of the inner concave faces reduces the direct contact area between the adjacent retainer main bodies compared with a straight face, and therefore friction and abrasion between the retainer main bodies are reduced, and the service life of the retainer main bodies is prolonged. And the overall performance and stability of the bearing are improved.

Description

Technical Field

[0001] This application belongs to the field of bearing cages, and particularly relates to a high-strength, low-friction cage formed by high-pressure casting. Background Technology

[0002] The segmented cage design commonly used in wind turbine pitch bearings relies on the relative rotation of the inner or outer rings. This rotation drives the rolling balls, causing the cage to move synchronously. However, this design introduces several problems: first, friction occurs between the cage and the rolling elements; second, the design clearances between the segmented components lead to contact wear. These clearances also limit the effective retention of lubricating oil, making it difficult for the heat generated during wear to dissipate effectively.

[0003] Under such abrasion conditions, the segmented cage assembly, especially the end beams, is highly susceptible to damage. Once the cage is damaged, it cannot effectively support the rolling elements, potentially leading to deformation or damage of the rolling elements. This chain reaction further accelerates bearing wear and failure, ultimately shortening the lifespan of the wind turbine. Therefore, existing technology still requires further improvement and enhancement. Utility Model Content

[0004] This invention provides a high-strength, low-friction cage formed by high-pressure casting to solve the problem that segmented cage assemblies are easily damaged, especially at the end window beam position, which aggravates bearing wear and failure.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-strength, low-friction cage formed by high-pressure casting includes a cage body formed by high-pressure casting. The cage body includes two arc-shaped segments and multiple window beams connecting the two arc-shaped segments. The window beams between adjacent window beams form window holes for accommodating rolling elements. The window beams located at both ends of the cage body have concave surfaces on the side opposite to the window holes. The concave surfaces of two adjacent cage bodies are arranged opposite each other to form an oil-accommodating gap, which increases the oil storage capacity inside the bearing to ensure lubrication and reduces the contact area between adjacent cage bodies.

[0007] By employing the high-strength, low-friction cage formed by high-pressure casting as described in this application, and by providing concave surfaces on the end beams of the cage body, with these concave surfaces positioned opposite each other between adjacent cage bodies to form an oil-receiving gap, the oil storage space inside the bearing is significantly increased. This ensures sufficient lubrication between the rolling elements and the cage body, as well as between cage bodies themselves, and also facilitates more effective heat dissipation. Compared to straight surfaces, the concave surface design reduces the direct contact area between adjacent cage bodies, thereby reducing friction and wear, and improving the overall performance and stability of the bearing.

[0008] In a preferred implementation, the concave surface is arc-shaped and extends from one end of the window beam to the other.

[0009] In a preferred embodiment, the window beam has a first flange facing the inner ring and a second flange facing the outer ring. The first flange / second flange can contact the inner ring or outer ring of the bearing to reduce the contact area between the cage body and the inner and outer rings of the bearing and reduce friction.

[0010] In a preferred embodiment, the first flange and the second flange are provided with extensions extending away from the direction of the window opening, and adjacent cage bodies are in contact through the extensions, which have rounded contact surfaces.

[0011] The extension further reduces the direct contact area between adjacent cage bodies, as the contact point is confined to the extension. This not only reduces friction caused by contact but also reduces heat and wear generated by friction. The rounded contact surfaces on the extension disperse contact stress, reducing localized wear caused by stress concentration.

[0012] In a preferred embodiment, the top surfaces of the first flange and the second flange are provided with protrusions, the area of ​​which is smaller than the area of ​​the top surfaces of the first flange and the second flange.

[0013] The protrusion further reduces the direct contact area between the first and second flanges and the inner and outer rings of the bearing.

[0014] In a preferred implementation, the protrusion has an arc-shaped contact surface.

[0015] In a preferred embodiment, the first flange has a contact arc surface facing the window opening. The contact arc surfaces of the two first flanges forming the window opening are arranged opposite each other, and the distance between the two contact arc surfaces is less than the diameter of the rolling element. The contact arc surfaces can contact the outer surface of the rolling element to limit the rolling element from exceeding the first flange.

[0016] In a preferred embodiment, the second flange has a guide surface facing the window opening, and the guide surfaces of the two second flanges of the two adjacent window beams constituting the window opening are arranged opposite to each other, and the distance between the two guide surfaces is greater than the diameter of the rolling element, so as to facilitate the installation of the rolling element from the guide surface.

[0017] In a preferred embodiment, two symmetrical first flanges and second flanges are provided on the surface of the window beam, and an oil passage gap is formed between the symmetrically arranged first flanges and second flanges.

[0018] In a preferred implementation, the arc-shaped segment has a groove facing the pocket surface to reduce the contact area between the arc-shaped segment and the rolling element. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic three-dimensional structural view of one side of the high-strength, low-friction cage formed by high-pressure casting of this application is shown;

[0021] Figure 2 A schematic three-dimensional structural view of another side of the high-strength, low-friction cage formed by high-pressure casting in this application is shown;

[0022] Figure 3 The illustration shows a schematic structural view of two adjacent combinations of a high-strength, low-friction cage formed by high-pressure die casting according to this application.

[0023] Label Explanation:

[0024] 1. Main body of the cage; 10. Arc-shaped section; 100. Groove; 11. Window beam; 110. Concave surface; 1100. Oil-receiving gap; 2. First flange; 20. Contact arc surface; 3. Second flange; 30. Guide surface; 4. Extension; 40. Rounded corner contact surface; 5. Protrusion; 6. Oil passage gap. Detailed Implementation

[0025] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0026] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In this utility model, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] In this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0029] The present invention will now be described with reference to the accompanying drawings.

[0030] The specific solution adopted is as follows:

[0031] like Figure 1-3 As shown, this utility model provides a high-strength, low-friction cage formed by high-pressure casting, including a cage body 1 formed by high-pressure casting. The cage body 1 includes two arc-shaped segments 10 and multiple window beams 11 connecting the two arc-shaped segments 10. The window beams 11 adjacent to each other form a window hole for accommodating rolling elements. The window beams 11 located at both ends of the cage body 1 have a concave surface 110 on the side opposite to the window hole. The concave surfaces 110 of two adjacent cage bodies 1 are arranged opposite each other to form an oil-holding gap 1100, which increases the oil storage capacity inside the bearing to ensure lubrication and reduces the contact area between adjacent cage bodies 1.

[0032] In high-pressure casting, molten metal is injected into the mold under high pressure, allowing it to fill every corner of the mold more thoroughly, reducing porosity and defects, and thus increasing the density of the casting. Increased density means the material is more compact internally, making it more effective at resisting external stress and wear.

[0033] By providing concave surfaces 110 on the window beams 11 at both ends of the cage body 1, and arranging these concave surfaces 110 opposite each other between adjacent cage bodies 1, an oil-receiving gap 1100 is formed, significantly increasing the oil storage space inside the bearing. This ensures sufficient lubrication between the rolling elements and the cage body 1, as well as between cage bodies 1 and themselves, and also helps to dissipate heat more effectively. Compared to straight surfaces, the design of the concave surfaces 110 reduces the direct contact area between adjacent cage bodies 1, thereby reducing friction and wear between them. This improves the overall performance and stability of the bearing.

[0034] In a preferred embodiment of this application, the concave surface 110 is arc-shaped and extends from one end of the window beam 11 to the other end.

[0035] The design of the arc-shaped concave surface 110 helps the lubricating oil to be distributed more evenly between the cage bodies 1. Since the concave surface 110 is continuous, the lubricating oil can flow more easily along these curved surfaces, filling all corners and ensuring that the bearing interior is adequately lubricated.

[0036] In a preferred embodiment of this application, the window beam 11 has a first flange 2 facing the inner ring and a second flange 3 facing the outer ring. The first flange 2 / second flange 3 can contact the inner ring or outer ring of the bearing. The design of the first flange 2 and second flange 3 effectively reduces the direct contact area between the cage body and the inner or outer ring of the bearing. Compared to a design without flanges, the presence of flanges makes the contact surface more limited, thereby reducing the generation of friction. This design can significantly reduce the energy loss of the bearing during operation and improve overall efficiency.

[0037] Furthermore, the first flange 2 and the second flange 3 are provided with extensions 4 extending away from the direction of the window opening. Adjacent retainer bodies 1 are in contact through the extensions 4, and the extensions 4 have rounded contact surfaces 40.

[0038] The extension 4 further reduces the direct contact area between adjacent cage bodies 1, as the contact point is confined to the extension 4. This not only reduces friction caused by contact but also reduces heat and wear generated by friction. The rounded contact surface 40 on the extension 4 can disperse contact stress, reducing localized wear caused by stress concentration. Furthermore, the perfect connection between the curved surfaces on the first flange 2 and the second flange 3, which are positioned away from the window opening direction, and the arc-shaped concave surface 110 not only improves the structural continuity of the cage but also enhances its overall stability. The cage can better disperse stress when under load, avoiding localized overload and deformation.

[0039] See Figure 2 The top surfaces of the first flange 2 and the second flange 3 are provided with a protrusion 5. The area of ​​the protrusion 5 is smaller than the area of ​​the top surfaces of the first flange 2 and the second flange 3. The protrusion 5 has an arc-shaped contact surface.

[0040] The protrusion 5 further reduces the direct contact area between the first flange 2 and the second flange 3 and the inner and outer rings of the bearing. Since the area of ​​the protrusion 5 is smaller than the entire top surface area, the contact point is more limited, thus significantly reducing friction and wear caused by contact. The protrusion 5 adopts an arc-shaped contact surface design, which can disperse contact stress and avoid excessive stress concentration in local areas, thereby reducing wear and deformation caused by stress concentration.

[0041] In a preferred embodiment of this application, the first flange 2 has a contact arc surface 20 facing the window opening. The contact arc surfaces 20 of the two first flanges 2 formed by the two adjacent window beams 11 constituting the window opening are arranged opposite each other, and the distance between the two contact arc surfaces 20 is less than the diameter of the rolling element. The contact arc surfaces 20 can contact the outer surface of the rolling element to limit the rolling element from exceeding the first flange 2. The second flange 3 has a guide surface 30 facing the window opening. The guide surfaces 30 of the two second flanges 3 formed by the two adjacent window beams 11 constituting the window opening are arranged opposite each other, and the distance between the two guide surfaces 30 is greater than the diameter of the rolling element to facilitate the installation of the rolling element from the guide surface 30.

[0042] During installation, insert the rolling element through the opening of the window hole along the guide surface 30 of the second flange 3. Since the distance between the two guide surfaces 30 is greater than the diameter of the rolling element, the rolling element can easily pass through the guide surfaces 30 into the window hole. Continue pushing the rolling element until it contacts the contact arc surface 20 of the first flange 2. At this point, since the distance between the two contact arc surfaces 20 is less than the diameter of the rolling element, the rolling element will be confined between the first flanges 2 and cannot move further. Repeat the above steps until all rolling elements are correctly installed in the window hole.

[0043] In a preferred embodiment of this application, two symmetrical first flanges 2 and second flanges 3 are provided on the surface of the window beam 11, and an oil passage gap 6 is formed between the two symmetrically arranged first flanges 2 and the two symmetrically arranged second flanges 3. The lubricating oil in the oil passage gap 1100 can pass through the oil passage gap 6, be evenly distributed on the surfaces of the first flanges 2 and the second flanges 3, and further penetrate between the rolling elements. This reduces friction and wear between the rolling elements and the cage body 1.

[0044] In a preferred embodiment of this application, the arc-shaped segment 10 is provided with a groove 100 facing the pocket surface to reduce the contact area between the arc-shaped segment 10 and the rolling element.

[0045] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0046] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-strength, low-friction cage formed by high-pressure casting, characterized in that, The cage body is formed by high pressure casting. The cage body includes two arc-shaped segments and multiple window beams connecting the two arc-shaped segments. The window beams between adjacent window beams form a window hole to accommodate the rolling elements. The window beams located at both ends of the cage body have a concave surface on the side away from the window hole. The concave surfaces of two adjacent cage bodies are arranged opposite each other to form an oil-receiving gap, which increases the oil storage capacity inside the bearing to ensure lubrication and reduces the contact area between adjacent cage bodies.

2. The high-strength, low-friction cage formed by high-pressure casting according to claim 1, characterized in that, The concave surface is arc-shaped and extends from one end of the window beam to the other.

3. The high-strength, low-friction cage formed by high-pressure casting according to claim 1, characterized in that, The window beam has a first flange facing the inner ring and a second flange facing the outer ring. The first flange / second flange can contact the inner ring or outer ring of the bearing to reduce the contact area between the cage body and the inner and outer rings of the bearing and reduce friction.

4. The high-strength, low-friction cage formed by high-pressure casting according to claim 3, characterized in that, The first flange and the second flange are provided with extensions extending away from the direction of the window opening. Adjacent cage bodies are in contact through the extensions, and the extensions have rounded contact surfaces.

5. The high-strength, low-friction cage formed by high-pressure casting according to claim 3, characterized in that, The top surfaces of the first flange and the second flange are provided with protrusions, the area of ​​which is smaller than the area of ​​the top surfaces of the first flange and the second flange.

6. The high-strength, low-friction cage formed by high-pressure casting according to claim 5, characterized in that, The protrusion has an arc-shaped contact surface.

7. The high-strength, low-friction cage formed by high-pressure casting according to claim 3, characterized in that, The first flange has a contact arc surface facing the window opening. The contact arc surfaces of the two first flanges that form the two adjacent window beams of the window opening are arranged opposite each other, and the distance between the two contact arc surfaces is less than the diameter of the rolling element. The contact arc surface can contact the outer surface of the rolling element to limit the rolling element from exceeding the first flange.

8. The high-strength, low-friction cage formed by high-pressure casting according to claim 3, characterized in that, The second flange has a guide surface facing the window opening. The guide surfaces of the two second flanges that form the window opening are arranged opposite each other, and the distance between the two guide surfaces is greater than the diameter of the rolling element, so as to facilitate the installation of the rolling element from the guide surface.

9. The high-strength, low-friction cage formed by high-pressure casting according to claim 3, characterized in that, Two symmetrical first flanges and second flanges are provided on the surface of the window beam, and an oil passage gap is formed between the symmetrically arranged first flanges and second flanges.

10. The high-strength, low-friction cage formed by high-pressure casting according to claim 1, characterized in that, The curved section has a groove facing the pocket surface to reduce the contact area between the curved section and the rolling element.

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