Full complement mixed ceramic angular contact ball bearing

Abstract

The utility model belongs to the field of ball bearings, and particularly relates to a full complement mixed ceramic angular contact ball bearing, which comprises an inner ring, an outer ring and ball rollers, the ball rollers are ceramic rollers, a plurality of the ball rollers are fully complemented and assembled between an inner ring channel and an outer ring channel, the inner diameter surface of the outer ring is provided with a slope type ball locking port along the axial direction, and the inner diameter surface of the outer ring is provided with a slope type ball locking port. And the curvature radius of the inner ring channel is greater than that of the outer ring channel. According to the full-complement mixed ceramic angular contact ball bearing disclosed by the utility model, steel balls are replaced by the ceramic balls, so that not only is the weight of a complete set of bearing reduced, but also the gyroscopic moment generated by high-speed spinning of the steel balls is reduced, the sliding friction between the spinning of the steel balls and a raceway is reduced, the power consumption is reduced, the generated heat is small, and the quality is more stable. The proper locking amount of the bearing ring is increased, so that ball falling caused by ring expansion due to temperature rise during high-speed rotation is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of ball bearings, and in particular relates to a fully-filled hybrid ceramic angular contact ball bearing. Background Art

[0002] Angular contact ball bearings are a widely used structural type with excellent speed performance and strong comprehensive load-bearing capacity. They have strong advantages, especially in application scenarios that take into account both high speed and load-bearing stiffness, such as the support of machine tool spindles and some high-precision rotating shaft systems. For heavy load conditions, in order to improve the load-bearing capacity of bearing products, they are sometimes designed as full-fill structures, and some design parameters are optimized to enable them to adapt to high-speed and heavy-load conditions, thereby meeting certain specific applications.

[0003] At present, most magnetic suspension protection bearings use full-component angular contact ball bearings, but there are problems such as high failure rate and easy failure of bearings. Summary of the invention

[0004] Based on the above problems existing in the prior art, the purpose of the utility model is to provide a new design of high-speed full-fill hybrid ceramic angular contact ball bearing, which can well solve the above problems and achieve good results in practical applications.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fully-filled hybrid ceramic angular contact ball bearing, comprising an inner ring, an outer ring and ball rollers, the ball rollers are ceramic rollers, and a plurality of the ball rollers are fully assembled between the inner ring groove and the outer ring groove, and a sloped ball locking opening is axially arranged on the inner diameter surface of the outer ring, the curvature radius of the inner ring groove is greater than the curvature radius of the outer ring groove, and the rib heights of the inner ring and the outer ring are 0.19 to 0.22 times the diameter of the steel ball.

[0006] Furthermore, the inclination angle of the ball locking opening is 4°±30′.

[0007] Furthermore, the ball lock opening and the outer ring groove adopt R-rounded transition.

[0008] Furthermore, the curvature radius coefficient of the inner ring channel is 0.525-0.53, and the curvature radius coefficient of the outer ring channel is 0.515-0.52.

[0009] Furthermore, the transition between the rib and the channel is ground by round chamfering.

[0010] Furthermore, the radius of the round chamfer is 0.1 to 0.2 times the height of the rib.

[0011] The beneficial effects of the utility model are as follows: the fully loaded hybrid ceramic angular contact ball bearing of the utility model uses ceramic balls instead of steel balls, which not only reduces the weight of the complete bearing set, but also reduces the gyroscopic moment generated by the high-speed spinning of the steel balls, reduces the sliding friction between the spinning steel balls and the raceway, reduces power consumption, generates less heat, and thus has more stable quality. The bearing ring increases an appropriate amount of locking to avoid the ball falling due to the expansion of the ring caused by the temperature rise during high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a full-complement hybrid ceramic angular contact ball bearing of the utility model;

[0013] Figure 2 It is a schematic diagram of the outer ring lock and channel structure;

[0014] In the figure: 1. Outer ring, 2. Inner ring, 3. Ball roller, 4. Ball lock mouth, 5. Outer diameter surface of the retaining flange. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0016] See attached Figure 1-2 A fully-filled hybrid ceramic angular contact ball bearing comprises an inner ring 2, an outer ring 1 and ball rollers 3, wherein a plurality of the ball rollers 3 are fully assembled between the inner ring groove and the outer ring groove, and an inclined ball locking opening 4 is axially arranged on the inner diameter surface of the outer ring, wherein the inclination angle of the ball locking opening 4 is 4°±30′, and the ball locking opening and the outer ring groove adopt an R fillet transition; the curvature radius coefficient of the inner ring groove is 0.525-0.53, the curvature radius coefficient of the outer ring groove is 0.515-0.52, the rib height of the inner ring and the outer ring is 0.19-0.22 times the diameter of the steel ball, and the transition between the rib and the groove is ground with a round chamfer, and the radius of the round chamfer is 0.1-0.2 times the rib height.

[0017] The use of ceramic balls instead of steel balls in bearings not only reduces the weight of the complete bearing set, but also reduces the gyroscopic torque generated by the high-speed spinning of the steel balls, reduces the sliding friction between the spinning steel balls and the raceways, reduces power consumption, generates less heat, and thus has more stable quality. The bearing rings are made of bearing steel and the rollers are made of ceramic, so they are called hybrid ceramic bearings.

[0018] Preferably, the ceramic balls are hot isostatically pressed silicon nitride ceramic balls. Hot isostatically pressed silicon nitride ceramics have excellent mechanical properties, and their elastic modulus and compressive strength are the highest among similar products.

[0019] The outer ring of the bearing is properly locked to avoid the ball falling due to the expansion of the ring caused by the temperature rise during high-speed rotation, and the locking angle is increased from the traditional 3° to about 4° to reduce the weight of the outer ring and facilitate ball loading. The ball locking mouth adopts R fillet transition, and the R angle is calculated by a special algorithm based on parameters such as ball diameter, ambient temperature, assembly temperature, and material expansion coefficient.

[0020] For high-speed rotating full-fill ceramic angular contact ball bearings, a larger inner groove curvature radius (coefficient 0.525~0.53) and a slightly smaller outer groove curvature radius (coefficient 0.515~0.52) are used to increase the fit between the rolling element and the raceway, thereby reducing the contact stress added to the outer ring due to the increased centrifugal force during high-speed rotation, increasing the impact resistance of the bearing, and thus improving the contact fatigue life of the bearing.

[0021] Based on the Hertz contact theory, the minimum height of the rib that does not cause over-shoulder failure under the working load is determined, and then the rib height is designed. The rib height is 0.19~0.22 times the diameter of the steel ball to avoid over-shoulder failure.

[0022] The transition between the rib and the raceway is ground with a round chamfer to avoid stress concentration and scratches on the rolling element when it contacts the rolling element, while at the same time not affecting the actual rib height due to excessive chamfering. The recommended chamfer radius is between 0.1 and 0.2 times the rib height.

[0023] It should be noted that the parts not described in detail in the present invention are prior art.

[0024] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A fully-filled hybrid ceramic angular contact ball bearing, characterized in that: It includes an inner ring, an outer ring and ball rollers, the ball rollers are ceramic rollers, a number of the ball rollers are fully assembled between the inner ring groove and the outer ring groove, the inner diameter surface of the outer ring is axially provided with a sloped ball locking mouth, the inclination angle of the ball locking mouth is 4°±30′, the ball locking mouth and the outer ring groove adopt a rounded transition, and the curvature radius of the inner ring groove is greater than the curvature radius of the outer ring groove.

2. A fully complemented hybrid ceramic angular contact ball bearing according to claim 1, characterized in that: The curvature radius coefficient of the inner ring channel is 0.525~0.53, and the curvature radius coefficient of the outer ring channel is 0.515~0.

52.

3. A fully complemented hybrid ceramic angular contact ball bearing according to claim 1, characterized in that: The height of the ribs of the inner ring and the outer ring is 0.19 to 0.22 times the diameter of the steel ball.

4. A fully complemented hybrid ceramic angular contact ball bearing according to claim 3, characterized in that: The transition between the rib and the channel is ground with round chamfering.

5. A fully complemented hybrid ceramic angular contact ball bearing according to claim 4, characterized in that: The radius of the round chamfer is 0.1 to 0.2 times the height of the rib.

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