High-speed mute angular contact bearing
By optimizing the spacing between the pocket and the rolling balls, the cage expands and presses tightly against the shoulder surface of the outer ring during high-speed rotation, solving the problem of balancing high speed and low noise in angular contact bearings, and achieving the effect of reducing heat and noise.
Patent Information
- Application Number
- CN202423190743.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing angular contact bearings have shortcomings in balancing high speed and low noise, especially at high speeds where they generate more heat and produce unstable noise.
By setting the ratio of the gap CleB between the pocket and the ball to the gap CleO between the outer wall of the cage base and the outer ring shoulder between 100% and 150%, and the relationship between the pocket and the ball diameter Dw is 4% Dw
It achieves reduced heat generation and noise during high-speed rotation, meeting the requirement of high-speed quiet operation.
Smart Images
Figure CN223549642U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of angular contact bearing technology, and in particular to a high-speed silent angular contact bearing. Background Technology
[0002] The cage in a rolling bearing is used to separate the balls during bearing rotation. To enable high-speed bearing operation, there are three main types of cage designs in the existing technology:
[0003] 1. Outer ring guidance: The gap between the outer diameter of the cage and the shoulder of the outer ring is smaller than the gap between the cage and the ball, and the gap between the cage and the shoulder of the inner ring. In this case, the cage can contact the outer ring but not the inner ring during rotation.
[0004] 2. Inner ring guidance: The clearance between the inner diameter of the cage and the inner ring shoulder is smaller than the clearance between the cage and the ball, and the clearance between the cage and the outer ring shoulder. In this case, the cage can contact the inner ring but not the outer ring during rotation.
[0005] 3. Ball-guided cage: The clearance between the cage pocket and the ball is smaller than the clearance between the cage and the outer ring shoulder, and the clearance between the cage and the inner ring shoulder. In this case, the cage will not contact the outer or inner ring.
[0006] However, when using the outer ring for guidance, the bearing can rotate at very high speeds due to lower heat generation, but it is more prone to noise at low speeds due to instability. Using the inner ring for guidance, high speed and low noise operation can be achieved, and it is also suitable for high-temperature applications, but it also makes proper lubrication of the inner ring guide groove difficult. This usually requires setting expensive special lubrication holes in the inner ring. When using ball guidance, low noise can be achieved, but a lot of heat is generated at high speeds, which limits the bearing speed. Therefore, it is necessary to improve existing angular contact bearings to meet the requirements of high-speed and low-noise operation. Utility Model Content
[0007] The purpose of this invention is to provide a high-speed, quiet angular contact bearing, which has the advantages of reducing heat and balancing the requirements of high speed and quiet operation.
[0008] The above technical object of the present utility model is achieved through the following technical solutions: A high-speed silent angular contact bearing includes an inner ring, an outer ring, and a number of balls evenly distributed between the inner ring and the outer ring. A cage is provided between the inner ring and the outer ring; the cage includes a cage body and a number of pocket holes evenly distributed on the cage body along the circumferential direction. The ratio between the distance CleB between the pocket hole and the ball and the distance CleO between the outer wall of the cage body and the outer ring shoulder is between 100% - 150%.
[0009] The present utility model is further configured such that: the distance CleB between the pocket hole and the ball satisfies 4% Dw < CleB < 10% Dw with respect to the ball diameter Dw.
[0010] In summary, the present utility model has the following beneficial effects:
[0011] 1. By improving the ratio between the distance CleB between the pocket hole and the ball and the distance CleO between the outer wall of the cage body and the outer ring shoulder to be between 100% - 150% and setting the distance CleB between the pocket hole and the ball to satisfy 4% Dw < CleB < 10% Dw with respect to the ball diameter Dw. Since the diameter of the cage pocket hole is larger than the diameter of the ball, during the high-speed rotation of the angular contact bearing, due to the centrifugal force and temperature effect, the cage expands, thus providing sufficient space for the free movement of the ball. At the same time, during the high-speed rotation process, the cage always supports on the outer ring and closely adheres to the shoulder side surface, reducing the friction with the ball, thereby reducing the heat generated during operation and taking into account the requirements of high speed and silence. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is the overall structural cross-sectional view of this embodiment;
[0013] Figure 2 is Figure 1 the enlarged schematic view of part A of
[0014] Reference numerals: 1, inner ring; 2, outer ring; 3, ball; 4, cage; 41, cage body; 42, pocket hole; 5, shoulder. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The present utility model will be further described in detail below with reference to the accompanying drawings.
[0016] Embodiment:
[0017] Reference Figures 1 to 2, A high-speed silent angular contact bearing, comprising an inner ring 1, an outer ring 2, and a number of balls 3 evenly distributed between the inner ring 1 and the outer ring 2. A cage 4 is provided between the inner ring 1 and the outer ring 2. The cage 4 includes a cage 4 body and a number of pocket holes 42 evenly distributed along the circumferential direction on the cage 4 body. The ratio between the distance CleB between the pocket holes 42 and the balls 3 and the distance CleO between the outer wall of the cage 4 body and the shoulder 5 of the outer ring 2 is between 100% - 150%. At the same time, the distance CleB between the pocket holes 42 and the balls 3 and the diameter Dw of the balls 3 satisfy 4% Dw < CleB < 10% Dw. Since the diameter of the pocket holes 42 of the cage 4 is larger than the diameter of the balls 3, during the high-speed rotation of the angular contact bearing, due to the centrifugal force and temperature effect, the cage 4 expands, thus providing enough space for the free movement of the balls 3 by the cage 4. At the same time, during the high-speed rotation process, the cage 4 always supports on the outer ring 2 and is close to the shoulder side surface, reducing the friction on the balls 3, thereby reducing the heat generated during operation.
[0018] Brief description of the usage process: By improving the ratio between the distance CleB between the pocket holes 42 and the balls 3 and the distance CleO between the outer wall of the cage 4 body and the shoulder 5 of the outer ring 2 and defining the size relationship between the distance CleB between the pocket holes 42 and the balls 3 and the diameter Dw of the balls 3, during the high-speed rotation of the angular contact bearing, due to the centrifugal force and temperature effect, the cage 4 expands, thus providing enough space for the free movement of the balls 3 by the cage 4. At the same time, during the high-speed rotation process, the cage 4 always supports on the outer ring 2 and is close to the shoulder side surface, reducing the friction on the balls 3, thereby reducing the heat generated during operation.
[0019] This specific embodiment is only an explanation of the present invention, and it is not a limitation to the present invention. After reading this specification, those skilled in the art can make modifications with creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.
Claims
1. A high-speed silent angular contact bearing, comprising an inner ring (1), an outer ring (2), and a plurality of rolling balls (3) evenly distributed between the inner ring (1) and the outer ring (2), wherein a cage (4) is provided between the inner ring (1) and the outer ring (2); characterized in that, The retainer (4) includes a retainer (4) base and a plurality of pockets (42) evenly distributed along the circumferential direction on the retainer (4) base. The ratio between the distance CleB between the pockets (42) and the ball (3) and the distance CleO between the outer wall of the retainer (4) base and the shoulder (5) of the outer ring (2) is between 100% and 150%.
2. The high-speed silent angular contact bearing according to claim 1, characterized in that, The distance CleB between the pocket (42) and the ball (3) satisfies 4% of the diameter Dw of the ball (3). <CleB<10%Dw。