Conical bearing anti-interference cage and bearing

Abstract

The utility model belongs to the field of wind power main shaft bearing, concretely relates to a kind of conical bearing interference cage and bearing, cage is solid cage, including coaxially arranged big end ring, small end ring, and the connecting between big end ring and small end ring several crossbeams, crossbeam is along annular equidistantly evenly distributed, and there is pocket for rolling element assembly between two adjacent crossbeams;Big end ring has the big end ring bending part of outwardly inclined on the side away from small end ring, and the tail corner of big end ring bending part is obliquely cut transition to form outer inclined surface for avoiding.The bending structure is formed at the root of the big end face of cage, which increases the strength of the cage and adjusts the center of gravity of the cage to the axial center, improves the running stability and flexibility of the cage;The tail end of the bending structure is obliquely cut, so that the tail end of the cage forms a gentle outer edge, reduces stress concentration, and avoids interference with external structures, meeting the physical installation requirements in a given narrow space.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine main shaft bearings, specifically relating to a tapered bearing anti-interference cage and bearing. Background Technology

[0002] With the increasing global demand for renewable energy, wind power technology is rapidly developing towards larger scale and higher efficiency. The single-unit capacity of wind turbines is constantly increasing, generally entering the "megawatt" era of 6MW and above, and even 10-15MW. The increasing size of the units places unprecedentedly stringent demands on the performance and reliability of their core components, requiring large-size, high-load-bearing bearings while also placing special requirements on the internal space of the wind turbine. The compact internal space design of wind turbines necessitates corresponding improvements to the bearing cage structure to avoid interference. The contradiction between unit size and structural compactness ultimately manifests in fundamental components such as the bearing cage. The reliability of future wind turbines largely depends on whether these "invisible" core components can achieve a leap in performance through innovation in materials science, structural design, and manufacturing processes. The bearing cage, once considered a standard component, has now become one of the key indicators for measuring the advancement and reliability of wind turbines. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide an anti-interference cage for tapered roller bearings. This type of structure can be used in large-size single-row or double-row tapered roller bearings. This type of product is mainly used in the field of wind power main shaft bearings, and can also be applied to many fields such as heavy-duty working conditions, large rated load, and long-life bearings.

[0004] To achieve the above objectives, the specific technical solution adopted by this utility model is as follows: a tapered bearing anti-interference cage, wherein the cage is a solid cage, including a large end ring and a small end ring arranged coaxially, and several crossbeams connected between the large end ring and the small end ring, the crossbeams being evenly distributed at equal intervals along the ring, and a pocket for assembling rolling elements being provided between two adjacent crossbeams; the side of the large end ring away from the small end ring has an outwardly inclined large end ring bend, and the tail corner of the large end ring bend is obliquely cut to form an outer inclined surface for avoidance.

[0005] Furthermore, the inner wall of the large end ring bend and the outer wall of the large end ring bend are offset in the axial direction, and the tail ends of the inner wall of the large end ring bend and the outer wall of the large end ring bend are transitioned by the outer inclined surface.

[0006] Furthermore, the inner wall of the large end ring bend and the outer wall of the large end ring bend are coaxial cylindrical surfaces, and their axes coincide with the axis of the cage.

[0007] Furthermore, the inner wall of the large end ring bend and the tail end of the outer wall of the large end ring bend are transitioned by the outer inclined surface and the radial transition surface.

[0008] Furthermore, in the cross-sectional direction, the inner wall of the large end ring bend is connected to the inner wall of the large end ring body through an inner inclined surface, and the outer wall of the large end ring bend is connected to the outer wall of the large end ring body. The outer wall of the large end ring bend is connected to the inner wall of the large end ring bend in sequence through the outer inclined surface and the radial transition surface; there is a smooth transition between the large end ring bend and the large end ring body; and there is a smooth transition at the joints of each surface of the large end ring bend.

[0009] Furthermore, the angle between the outer inclined surface and the horizontal is 30°-60°.

[0010] Furthermore, the angle between the outer inclined surface and the horizontal is 45°.

[0011] Furthermore, the small end ring has a small end ring bend on the side away from the large end ring, the small end ring bend extends radially toward the inside of the bearing, and the small end ring bend smoothly transitions to the small end ring body.

[0012] Furthermore, each surface of the large end ring bend is formed by machining, and the cage is a machined solid cage.

[0013] On the other hand, this utility model protects a tapered roller bearing, including an inner ring, an outer ring, rolling elements, and the aforementioned cage, wherein the rolling elements are fitted into pockets within the cage. The bearing is mounted inside a wind turbine generator, and the outer bevel at the tail end of the cage avoids contact with the internal structure of the generator.

[0014] The beneficial effects of this utility model are as follows: the bent structure formed at the root of the large end face of the cage increases the strength of the cage and adjusts the center of gravity of the cage to the axial center, improving the stability and flexibility of the cage operation; the beveled design at the tail end of the bent structure makes the tail end of the cage form a gentle outer edge, reducing stress concentration and avoiding interference with the external structure, thus meeting the physical installation requirements in a given narrow space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a conventional tapered bearing cage structure; Figure 2 To reduce the root width and avoid interference in the conventional tapered bearing cage structure; Figure 3 This is a schematic diagram of the anti-interference retainer of this utility model; Figure 4 This is an enlarged view of the large end ring of the cage of this utility model; Figure 5 This is a schematic diagram showing the center of gravity position of the anti-interference cage of this utility model; Figure 6 This is a schematic diagram showing the center of gravity of a conventional tapered bearing cage structure. Figure 7 This is the bearing assembly drawing for this utility model; Figure 8 Interference diagram for a standard tapered bearing assembly; In the diagram: 1. Large end ring; 11. Large end ring body; 111. Outer wall of large end ring body; 112. Inner wall of large end ring body; 12. Large end ring bend; 121. Outer wall of large end ring bend; 122. Outer inclined surface; 123. Radial transition surface; 124. Inner wall of large end ring bend; 125. Inner inclined surface. 2. Small end ring; 21. Small end ring body; 22. Small end ring bending part; R, rounded corners for smooth transition; A, maintain the center of gravity of the cage. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] An anti-interference cage for tapered roller bearings is disclosed. The cage is a solid cage comprising a large end ring 1 and a small end ring 2 coaxially arranged, and several crossbeams connecting the large end ring and the small end ring. The crossbeams are evenly distributed at equal intervals along the ring, and there are pockets for assembling rolling elements between two adjacent crossbeams. The large end ring 1 has an outwardly inclined large end ring bend 12 on the side away from the small end ring. The tail corner of the large end ring bend 12 is obliquely cut to form an outer inclined surface 122 for avoidance. The outer inclined surface 122 makes an angle of 45° with the horizontal direction. The large end ring bend 12 and the large end ring body 11 are smoothly transitioned. The joints of each surface of the large end ring bend 12 are also smoothly transitioned.

[0018] Specifically, for ease of surface processing, the inner wall 124 and the outer wall 121 of the large end ring bend are coaxial cylindrical surfaces, and their axes coincide with the axis of the cage; the inner wall 124 and the outer wall 121 of the large end ring bend are offset in the axial direction, and their tail ends are transitioned by the outer inclined surface 122 and the radial transition surface 123 to avoid sharp corners.

[0019] Furthermore, in the cross-sectional direction, the inner wall 124 of the large end ring bend is connected to the inner wall 112 of the large end ring body via the inner inclined surface 125, and the outer wall 121 of the large end ring bend is connected to the outer wall 111 of the large end ring body. The outer wall 121 of the large end ring bend is connected to the inner wall 124 of the large end ring bend in sequence via the outer inclined surface 122 and the radial transition surface 123.

[0020] Furthermore, the small end ring 2 has a small end ring bend 22 on the side away from the large end ring 1. The small end ring bend 22 extends radially toward the inside of the bearing and has a smooth transition with the small end ring body 21.

[0021] In this embodiment, the small end ring body 21 and the large end ring body 11 are the portions of the small end ring and the large end ring that continue the tilting direction of the conical cage.

[0022] Furthermore, each surface of the large-end ring bend 12 is machined, and the cage is a machined solid cage. The solid cage structure is robust and can withstand high centrifugal force, impact load, and vibration, meeting the working environment requirements of large-megawatt generator sets.

[0023] The bearing with the aforementioned cage is assembled inside the wind turbine generator, and the outer bevel at the tail end of the cage avoids contact with the internal structure of the turbine. Figure 7 As shown. However, a standard cage can interfere with existing models, such as... Figure 8 .

[0024] The structural improvements of the anti-interference cage of this utility model are reflected in the following two aspects: 1. Large end ring bend and oblique transition The base of the cage is not a typical right angle or straight cut (e.g.) Figure 1 Instead of a traditional bend, it employs an outward-sloping section with a beveled transition, creating a gentle outer edge at the rear of the cage. This transition section uses an outward-sloping corner design to create a smooth angle transition, and the joints between surfaces are rounded to avoid stress concentration. The angle can be 45° to the horizontal, or adjusted according to the actual space. Figure 3 .

[0025] 2. Double-layer wall line and reinforcing rib structure at the large end ring bend. The inner and outer walls of the large-end ring bend maintain a certain parallel relationship and are transitioned through a beveled section. This enhances the rigidity of the tail end while maintaining the feasibility of machining. Simply reducing the root width in a conventional structure would affect the strength of the cage root, such as... Figure 2 .

[0026] The structural improvements at the large end root of the cage have enabled the following functions: 1. Resolving Space Conflicts (Structural Optimization): By modifying the shape of the cage's large-end ring root, the physical installation requirements within a given narrow space were met. With the user's model structure already determined, a conventional cage design would interfere with the existing model structure, making assembly impossible. The new structure prevents this interference. Furthermore, this beveled cut reduces stress concentration. A comparison of the assembled ordinary and new structures is shown below. Figure 7 , Figure 8 .

[0027] 2. Optimized Dynamic Performance (Center for Gravity Adjustment): By reshaping the structure, the center of gravity is adjusted to the axial center, significantly improving the cage's operational smoothness and flexibility, reducing uneven wear and vibration, and increasing efficiency. Uneven cage rotation is a common problem in high-speed bearings. In ordinary structures, the rearward center of gravity generates eccentric moments, causing the cage to wobble or even collide. The new structure, by changing the shape of the large end (possibly through weight reduction or mass redistribution), returns the center of gravity to the axial center, directly improving dynamic performance and reducing vibration and wear. (Cage center of gravity comparison example follows.) Figure 5 , Figure 6 .

[0028] 3. Enhanced inherent reliability (strength enhancement): This design does not weaken the structure by avoiding space; on the contrary, it strengthens the most critical load-bearing parts through optimized design, fundamentally improving the product's durability and ultimate load-bearing capacity.

[0029] Enhanced impact and fatigue resistance: The root area of ​​the large end is a critical region for stress concentration and load-bearing capacity of the cage. Strengthening this area allows the cage to better withstand the instantaneous and enormous loads and impacts generated during wind turbine start-up and shutdown, pitch changes, encounters with gusts, or grid surges, significantly improving fatigue life and reducing the risk of root cracking or breakage.

[0030] This utility model is a typical and excellent engineering example of solving a systemic problem through localized innovation. It cleverly integrates three seemingly independent objectives into a single solution: This design not only allows new products to be integrated into older models, solving compatibility issues, but more importantly, it delivers superior performance, higher reliability, and longer service life, achieving a leap from simply "meeting requirements" to "creating value." This vividly demonstrates the advancements in wind power technology at the microscopic level.

[0031] It should be noted that the parts of this utility model not described in detail are existing technologies.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "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 are not intended to 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.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] 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 part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] The above examples are merely preferred embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A tapered bearing anti-interference cage, characterized in that: The cage is a solid cage, including a large end ring and a small end ring arranged coaxially, and several crossbeams connecting the large end ring and the small end ring. The crossbeams are evenly distributed at equal intervals along the ring, and there are pockets between two adjacent crossbeams for assembling rolling elements. The side of the large end ring away from the small end ring has an outwardly inclined large end ring bend, and the tail corner of the large end ring bend is obliquely cut to form an outer bevel for avoidance.

2. The anti-interference cage for tapered bearings according to claim 1, characterized in that: The inner wall of the large end ring bend and the outer wall of the large end ring bend are offset in the axial direction, and the tail ends of the inner wall of the large end ring bend and the outer wall of the large end ring bend are transitioned by the outer inclined surface.

3. The anti-interference cage for tapered bearings according to claim 2, characterized in that: The inner wall of the large end ring bend and the outer wall of the large end ring bend are coaxial cylindrical surfaces, and their axes coincide with the axis of the cage.

4. The anti-interference cage for tapered bearings according to claim 2, characterized in that: The inner wall of the large end ring bend and the tail end of the outer wall of the large end ring bend are transitioned by the outer inclined surface and the radial transition surface.

5. The anti-interference cage for tapered bearings according to claim 2, characterized in that: In the cross-sectional direction, the inner wall of the large end ring bend is connected to the inner wall of the large end ring body through the inner inclined surface, and the outer wall of the large end ring bend is connected to the outer wall of the large end ring body. The outer wall of the large end ring bend is connected to the inner wall of the large end ring bend in sequence through the outer inclined surface and the radial transition surface. The large end ring bend and the large end ring body have a smooth transition. The joints of the various surfaces of the large end ring bend have a smooth transition.

6. The anti-interference cage for tapered bearings according to claim 1, characterized in that: The angle between the outer inclined plane and the horizontal is 30°-60°.

7. The anti-interference cage for tapered bearings according to claim 1, characterized in that: The outer inclined plane forms a 45° angle with the horizontal.

8. The anti-interference cage for tapered bearings according to claim 1, characterized in that: The small end ring has a bent portion on the side away from the large end ring. The bent portion extends radially toward the inside of the bearing and has a smooth transition with the main body of the small end ring.

9. The anti-interference cage for tapered bearings according to claim 1, characterized in that: Each surface of the large end ring bend is formed by machining, and the cage is a machined solid cage.

10. A tapered bearing, characterized in that: It includes an inner ring, an outer ring, rolling elements, and a cage as described in any one of claims 1-9, wherein the rolling elements are fitted into pockets in the cage.

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