High-speed heavy-load low-friction tapered roller bearing
By shortening the tapered roller axis, increasing the contact angle, and optimizing the design of the limiting cavity and guide surface in tapered roller bearings, the friction and temperature rise problems of tapered roller bearings under high speed and heavy load are solved, thereby achieving increased speed and load-bearing capacity and extending service life.
Patent Information
- Application Number
- CN202520261507.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing tapered roller bearings have high frictional torque under high speed and heavy load, which leads to high temperature rise and cannot meet the high efficiency requirements of modern machinery.
By shortening the length of the tapered rollers along the axial direction in tapered roller bearings, increasing the contact angle, and optimizing the design of the limiting cavity and guide surface, friction and temperature rise can be reduced, thereby increasing rotational speed and load-bearing capacity.
This technology has achieved a 60% increase in the rotational speed of tapered roller bearings, enhanced load-bearing capacity, reduced frictional torque, extended service life, and improved versatility for various applications.
Smart Images
Figure CN223908621U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of bearings, in particular to a high-speed heavy-load low-friction tapered roller bearing. BACKGROUND
[0002] The tapered roller bearing refers to a radial thrust type rolling bearing with tapered rollers as rolling elements, which comprises an outer ring, an inner ring, tapered rollers and a retainer, and the inner and outer rings are provided with tapered raceways.
[0003] Many modern emerging machines such as automobiles, engineering machinery and machine tools must be high-speed in order to pursue high efficiency, and the rotational speed of conventional tapered roller bearings cannot meet the requirements. CONTENT OF THE INVENTION
[0004] In order to improve the rotational speed of the tapered roller bearing and ensure heavy load, the present application provides a high-speed heavy-load low-friction tapered roller bearing.
[0005] The high-speed heavy-load low-friction tapered roller bearing provided by the present application adopts the following technical scheme:
[0006] The high-speed heavy-load low-friction tapered roller bearing comprises an inner ring, an outer ring, a retainer and a plurality of tapered rollers, the outer ring is sleeved on the conical surface of the inner ring, the installation cavity accommodating the retainer is left between the outer ring and the inner ring, the plurality of tapered rollers are rotatably connected to the end face of the retainer, the inner ring conical surface is provided with a limiting cavity abutting against the tapered roller, and the two ends of the tapered roller in the axial direction abut against the inner wall of the limiting cavity to form limiting.
[0007] By adopting the above technical scheme, the length of the tapered roller in the axial direction is shortened without changing the outer dimension, so that the two ends of the tapered roller in the axial direction abut against the inner wall of the limiting cavity to form limiting. When the tapered roller bearing works, the limiting cavity and the tapered roller are in linear contact, the shorter the tapered roller is, the smaller the contact area is, and the tapered roller is not easy to heat during high-speed rotation, which improves the rotational speed of the tapered roller bearing by 60%, so that the tapered roller bearing can adapt to different occasions, thereby improving the versatility of the tapered roller bearing.
[0008] Optionally, the tapered roller is provided with a rotating surface on the outer peripheral surface, and the inclination height of the rotating surface increases with the reduction of the distance from the tapered roller axis.
[0009] By adopting the technical scheme, the tilt height of the rotating surface increases with the decrease of the distance from the axis of the tapered roller, the contact angle of the tapered roller is increased, the rotation center of the tapered roller is reduced, that is, the centrifugal force of the tapered roller is reduced, the temperature rise in the rotation of the bearing is reduced, thereby the rotation speed of the bearing is increased; meanwhile, the diameter of the tapered roller is increased, the length of the axis of the tapered roller is shortened, the contact area of the tapered roller is smaller, the temperature rise of the tapered roller bearing is reduced, thereby the friction torque is reduced, the rated dynamic load is increased, the load capacity of the bearing is improved, and the load capacity of the bearing is improved.
[0010] Optionally, the end portion in the axis direction of the inner ring is higher than the end portion in the axis direction of the outer ring.
[0011] By adopting the technical scheme, the end portion in the axis direction of the inner ring is higher than the end portion in the axis direction of the outer ring, the length of the axis of the tapered roller is shortened, the thickness of the retaining rib of the inner ring is increased, the contact surface between the retaining rib of the inner ring and the spherical base surface of the tapered roller is reduced, the irregular sliding friction between the spherical base surface of the tapered roller and the retaining rib of the inner ring is reduced, the friction wear, burn or stress concentration is reduced, the retaining rib of the inner ring is prevented from being broken, the load capacity of the tapered roller bearing is improved, and the heavy load is realized.
[0012] Optionally, the end face of the inner ring close to the limiting cavity is provided with a guide surface, and the tilt height of the guide surface decreases with the decrease of the distance from the limiting cavity, and the guide surface guides the lubricating oil into the limiting cavity.
[0013] By adopting the technical scheme, the tilt height of the guide surface decreases with the decrease of the distance from the limiting cavity, the guide surface guides the lubricating oil into the limiting cavity, the contact area between the retaining rib of the inner ring and the spherical base surface of the tapered roller is reduced, and the flow exchange of the lubricating oil in the bearing is facilitated, and the wear between the spherical base surface of the tapered roller and the retaining rib of the inner ring is reduced.
[0014] Optionally, an oil inlet gap is left between the retainer and the outer peripheral surface of the inner ring.
[0015] By adopting the technical scheme, the oil inlet gap is located between the retainer and the outer peripheral surface of the inner ring, the oil inlet gap is small, the pumping effect is small, the stirring resistance is small, and the torque caused is small.
[0016] Optionally, a plurality of positioning cavities for rotating the tapered rollers are spaced apart on the outer peripheral surface of the retainer.
[0017] By adopting the technical scheme, the tapered rollers and the positioning cavities are one-to-one corresponding and embedded, the surface of the tapered roller abuts against the inner wall of the positioning cavity to form positioning, the tapered roller is not easy to be separated from the retainer, and the connection stability between the retainer and the tapered roller is improved.
[0018] Optionally, a buffer surface is arranged on the inner wall of the limiting cavity close to the guide surface, and the buffer surface is in a circular arc convex shape.
[0019] By adopting the technical scheme, the buffer surface is in a circular-arc convex shape, the sliding friction between the conical roller and the inner wall of the limiting cavity is reduced, and thus the friction torque of the conical roller bearing is reduced.
[0020] Optionally, the inner wall of the inner ring is provided with a guide surface in a circular-arc convex shape.
[0021] By adopting the technical scheme, the guide surface is in a circular-arc convex shape, the wear of the inner ring is reduced, and thus the service life of the conical roller bearing is prolonged.
[0022] In summary, the present application has at least one of the following beneficial technical effects:
[0023] 1. The limiting cavity is provided, the shorter the conical roller, the smaller the contact area, the conical roller is not easy to heat at high speed, the rotation speed of the conical roller bearing is increased by 60%, the conical roller bearing can adapt to different occasions, and thus the universality of the conical roller bearing is improved;
[0024] 2. The rotation surface is provided, the contact angle of the conical roller is increased, the rotation center of the conical roller is reduced, that is, the centrifugal force of the conical roller is reduced, the temperature rise in the rotation of the bearing is reduced, and thus the rotation speed of the bearing is improved;
[0025] 3. The guide surface is provided, the contact area between the inner ring stop edge and the spherical base surface of the conical roller is reduced, the flow exchange of the lubricating oil in the bearing is facilitated, and the wear between the spherical base surface of the conical roller and the inner ring stop edge is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 is a schematic diagram of the overall structure in the embodiment of the present application.
[0027] Figure 2 is a schematic diagram of the overall structure of the inner ring in the embodiment of the present application.
[0028] Figure 3 is a schematic diagram of the overall structure of the retainer in the embodiment of the present application.
[0029] Figure 4 is Figure 1 is an enlarged view of A in FIG. 1.
[0030] Figure 5 is Figure 1 is an enlarged view of B in FIG. 1.
[0031] Reference signs: 1, inner ring; 11, mounting cavity; 12, guide surface; 13, limiting cavity; 14, buffer surface; 15, guide surface; 2, outer ring; 3, retainer; 31, positioning cavity; 32, oil inlet gap; 4, conical roller; 41, rotation surface. DETAILED DESCRIPTION
[0032] The application will be further described below in conjunction with the accompanying drawings. Figures 1-5 The application will be further described below in conjunction with the accompanying drawings.
[0033] The application discloses a high-speed heavy-load low-friction tapered roller bearing. Referring to Figure 1 and Figure 2 , the high-speed heavy-load low-friction tapered roller bearing comprises an inner ring 1, an outer ring 2, a retainer 3 and a plurality of tapered rollers 4, the inner ring 1 and the outer ring 2 are both nitrocarburized in the embodiment, the wear resistance of the working surface of the bearing ring is improved, the organizational structure of the tapered roller bearing is improved, and the service life reliability of the bearing is improved; the outer ring 2 is coaxially arranged on the outer circumferential surface of the inner ring 1, an installation cavity 11 for embedding the retainer 3 is left between the end faces of the outer ring 2 and the inner ring 1, a plurality of positioning cavities 31 for embedding the tapered rollers 4 are arranged on the outer circumferential surface of the retainer 3 at intervals, the tapered rollers 4 are in one-to-one correspondence with the positioning cavities 31 and are embedded, and the tapered rollers 4 are positioned by abutting against the inner walls of the positioning cavities 31, so that the tapered rollers 4 and the retainer 3 are installed.
[0034] Referring to Figure 1 and Figure 3 , the inner walls of the two ends of the inner ring 1 in the axial direction are each provided with a guide surface 12, the guide surface 12 is in a circular arc convex shape, the wear of the inner ring 1 is reduced, and the service life of the tapered roller bearing is prolonged; a limiting cavity 13 for abutting the tapered rollers 4 is coaxially arranged on the conical surface of the inner ring 1, the outer circumferential surface of the tapered roller 4 is in rolling contact with the inner wall of the limiting cavity 13, and the two ends of the tapered roller 4 in the axial direction abut against the inner wall of the limiting cavity 13 to form limiting, in the case that the outer dimension of the tapered roller bearing does not change, the length of the tapered roller 4 in the axial direction is shortened by 20% in the embodiment, the contact angle is increased by 50%, and the diameter of the rotation center is reduced by 5%, so that the contact area between the tapered roller 4 and the inner wall of the limiting cavity 13 is reduced, the contact angle is increased, and the rotation center is reduced, the centrifugal force of the tapered roller 4 is reduced, the temperature rise in the rotation of the tapered roller bearing is reduced, and the rotation speed of the tapered roller bearing is increased by 60%.
[0035] Referring to Figure 1 , the outer circumferential surface of the tapered roller 4 is provided with a rotating surface 41, the inclination height of the rotating surface 41 increases with the reduction of the axial distance of the tapered roller 4, and the rated dynamic load increases with the increase of the diameter of the tapered roller 4, so that the load-carrying capacity of the tapered roller bearing is improved, and heavy load is realized; and in the embodiment, the diameter of the tapered roller 4 is increased by 18%-20%, and the rated dynamic load is increased by 35%-40%.
[0036] Referring to Figure 1 and Figure 4, the end of the inner ring 1 axis direction is higher than the end of the outer ring 2 axis direction, due to the shortening of the length of the tapered roller 4 axis direction, the thickness of the inner ring 1 baffle increases by 25%-30% in the embodiment, the strength of the inner ring 1 baffle is improved, the inner ring 1 baffle abuts the spherical base surface of the tapered roller 4, the irregular sliding friction between the spherical base surface of the tapered roller 4 and the inner ring 1 baffle is reduced, the friction wear, burn or stress concentration is reduced, the inner ring 1 baffle is not easy to break, the load capacity of the tapered roller bearing is improved, and heavy load is realized; the end surface of the inner ring 1 close to the limiting cavity 13 is provided with a guide surface 15, the inclination height of the guide surface 15 decreases with the distance of the limiting cavity 13, the guide surface 15 guides the lubricating oil into the limiting cavity 13, thereby improving the exchange and heat dissipation efficiency of the lubricating oil in the limiting cavity 13.
[0037] Referring to Figure 4 and Figure 5 , the inner wall of the limiting cavity 13 close to the guide surface 15 is provided with a buffer surface 14, the buffer surface 14 is in a circular arc convex shape, the wear between the inner wall of the limiting cavity 13 and the surface of the tapered roller 4 is reduced, thereby prolonging the service life of the tapered roller bearing; the oil inlet gap 32 is left between the retainer 3 and the outer circumferential surface of the inner ring 1, the end of the retainer 3 is embedded into the oil inlet gap 32, the space in the oil inlet gap 32 is shortened, the pumping effect is small, the stirring resistance is small, thereby causing small torque.
[0038] The implementation principle of the high-speed heavy-load low-friction tapered roller bearing in the embodiment is: under the condition that the outer shape size of the tapered roller bearing does not change, the length of the tapered roller 4 in the axis direction is shortened by 20% in the embodiment, the contact angle is increased by 50%, and the rotation center diameter is reduced by 5%, the friction torque of the tapered roller bearing is reduced, the contact area between the tapered roller 4 and the inner wall of the limiting cavity 13 is reduced, the contact angle is increased, and the rotation center is reduced, thereby reducing the centrifugal force of the tapered roller 4, reducing the temperature rise in the rotation of the tapered roller bearing, and improving the rotation speed of the tapered roller bearing by 60%; at the same time, the thickness of the inner ring 1 baffle is increased, the load capacity of the tapered roller bearing is improved, heavy load is realized, and the inner ring 1 baffle abuts the spherical base surface of the tapered roller 4, reducing the friction between the spherical base surface of the tapered roller 4 and the inner ring 1 baffle; the space of the oil inlet gap 32 is reduced, the torque caused by the stirring resistance formed by the pumping effect of the lubricating oil is reduced, thereby realizing lower torque, thereby prolonging the service life of the tapered roller bearing.
[0039] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. High speed heavy load low friction tapered roller bearing characterized in that: The application relates to a tapered roller bearing, which comprises an inner ring (1), an outer ring (2), a retainer (3) and a plurality of tapered rollers (4), the outer ring (2) is sleeved on the conical surface of the inner ring (1), an installation cavity (11) for accommodating the retainer (3) is formed between the outer ring (2) and the inner ring (1), the plurality of tapered rollers (4) are rotatably connected to the end surface of the retainer (3), the conical surface of the inner ring (1) is provided with a limiting cavity (13) for abutting the tapered rollers (4), and the two ends of the tapered rollers (4) in the axial direction abut the inner wall of the limiting cavity (13) to form limiting.
2. The high speed heavy load low friction tapered roller bearing of claim 1, wherein: The outer circumferential surface of the tapered roller (4) is provided with a rotating surface (41), the inclination height of the rotating surface (41) increases with the decrease of the axial distance of the tapered roller (4).
3. The high speed heavy load low friction tapered roller bearing of claim 1, wherein: The end of the inner ring (1) in the axial direction is higher than the end of the outer ring (2) in the axial direction.
4. The high speed heavy load low friction tapered roller bearing of claim 1, wherein: The end surface of the inner ring (1) close to the limiting cavity (13) is provided with a guide surface (15), the inclination height of the guide surface (15) decreases with the decrease of the distance of the limiting cavity (13), and the guide surface (15) guides the lubricating oil into the limiting cavity (13).
5. The high speed heavy load low friction tapered roller bearing of claim 1, wherein: An oil inlet gap (32) is formed between the retainer (3) and the outer circumferential surface of the inner ring (1).
6. The high speed heavy load low friction tapered roller bearing of claim 1, wherein: A plurality of positioning cavities (31) for rotating the tapered rollers (4) are formed on the outer circumferential surface of the retainer (3) at intervals.
7. The high speed heavy load low friction tapered roller bearing of claim 4, wherein: The inner wall of the limiting cavity (13) close to the guide surface is provided with a buffer surface (14), and the buffer surface (14) is in the form of a circular arc convexity.
8. The high speed heavy load low friction tapered roller bearing of claim 1, wherein: The inner wall of the inner ring (1) is provided with a guide surface (12), and the guide surface (12) is in the form of a circular arc convexity.