Ultrahigh-speed corner contact bearing

Abstract

The utility model provides an ultra-high-speed corner contact bearing which comprises an inner ring, an outer ring and a plurality of balls, the balls are attached between the outer ring and the inner ring in a rolling mode, and grooves matched with the balls are formed in the inner ring and the outer ring respectively. The device further comprises a plurality of rolling roll shafts and a positioning frame, one rolling roll shaft is attached between the two balls in a rolling mode, and the two sides of each rolling roll shaft are rotationally connected to the positioning frame. The positioning frame is mounted between the outer ring and the inner ring and is concentric with the outer ring and the inner ring; mounting grooves with the same number as the balls are further formed in the positioning frame, and gaps are reserved between the mounting grooves and the balls. Sliding friction between the balls and the retainer is changed into rolling friction through the rolling shaft, so that the situation that friction force is sharply increased due to centrifugal force is reduced, and the situation that the bearing is damaged during ultrahigh-speed operation is reduced.

Description

Technical Field

[0001] The utility model relates to the field of bearings, and particularly to a super-high-speed angular contact bearing. Background Art

[0002] An angular contact bearing is a special type of bearing, mainly composed of four parts: an inner ring, an outer ring, balls, and a cage. It can bear both radial loads and axial loads and is suitable for working environments with relatively high rotational speeds.

[0003] When the angular contact bearing is in a super-high-speed operating state, the main components of its frictional force include two parts: one part is the rolling friction generated by the useful work done by the balls during rolling, and the other part is the sliding friction caused by the useless work generated by the relative sliding between the rolling elements and the cage during movement. Especially when the angular contact bearing operates at an extremely high speed, the sliding friction force between the cage and the balls increases sharply due to the centrifugal force. The sharp increase in the sliding friction force will cause a significant increase in the bearing temperature, an increase in the vibration amplitude, and a weakening of the lubrication effect, exacerbating the wear of the components. In most cases, these adverse factors will first cause damage to the cage, and then cause the bearing to be unable to continue to work properly. Summary of the Utility Model

[0004] In order to reduce the damage of the cage caused by the increase in sliding friction force during super-high-speed operation, the present application provides a super-high-speed angular contact bearing.

[0005] A super-high-speed angular contact bearing provided by the present application adopts the following technical solutions:

[0006] A super-high-speed angular contact bearing includes an inner ring, an outer ring, and a plurality of balls. The plurality of balls are in rolling contact between the outer ring and the inner ring, and grooves for mating with the balls are respectively formed on the inner ring and the outer ring; characterized in that it further includes a plurality of rolling rollers and a positioning frame. A rolling roller is in rolling contact between two adjacent balls, and both sides of the rolling roller are rotatably connected to the positioning frame; the positioning frame is installed between the outer ring and the inner ring and is concentric with the outer ring and the inner ring; the positioning frame is further provided with installation grooves having the same number as the balls, and there is a gap between the installation grooves and the balls.

[0007] Through the above technical solutions, the sliding friction between the balls and the cage is changed into rolling friction by using the rolling rollers, thereby reducing the sharp increase in the friction force caused by the centrifugal force, and further reducing the situation of bearing damage during super-high-speed operation.

[0008] Preferably, the positioning frame is annular and has an internal space, and the internal space communicates with the installation groove; the rolling roller shaft is installed in the internal space, and rotating columns are fixed at both ends of the rolling roller shaft. The rolling roller shaft is rotatably inserted into the positioning frame through the rotating columns at both ends; the rolling roller shaft only contacts the adjacent balls on both sides, and there are gaps between the rolling roller shaft and the positioning frame, the outer ring and the inner ring.

[0009] Through the above technical solution, the friction between the rolling roller shaft and the positioning frame is also converted into rolling friction by the rotating columns, thereby reducing the damage to the bearing caused by the contact mode between the rolling roller shaft and the positioning frame during ultra-high-speed operation.

[0010] Preferably, an oil column is arranged at the center of the rolling roller shaft, and a large number of oil and gas holes are formed on the outer peripheral surface of the rolling roller shaft. The large number of oil and gas holes communicate the oil column with the external space.

[0011] Through the above technical solution, during ultra-high-speed movement, due to the influence of centrifugal force and temperature, the lubricating oil stored in the oil column becomes oil and gas and escapes outward through the oil and gas holes, thereby enhancing the lubrication degree of the outer peripheral surface of the rolling roller shaft and the balls that fit with the outer peripheral surface of the rolling roller shaft.

[0012] Preferably, both ends of the oil column respectively penetrate through the rotating columns and abut against the positioning frame. At the same time, oil and gas holes are also formed on the outer peripheral surface of the rotating columns to communicate the oil column with the external space.

[0013] Through the above technical solution, the influence of centrifugal force and temperature is also utilized to make the lubricating oil stored in the oil column become oil and gas to enhance the lubrication effect between the rotating columns and the positioning frame.

[0014] Preferably, a rotating groove is formed in the internal space for installing the rotating columns, and an oil guide groove that expands obliquely toward the rotating column is also formed on the rotating groove.

[0015] Through the above technical solution, the oil guide groove will collect the lubricating oil flowing due to centrifugal force and temperature here. When the amount is small, it will enhance the lubrication effect outside the rotating columns; while when the amount is excessive, it will replenish the lubricating oil in the oil column in the reverse direction.

[0016] Preferably, there are gaps between the positioning frame, the outer ring and the inner ring.

[0017] Through the above technical solution, friction between the positioning frame and the outer ring and the inner ring is avoided.

[0018] Preferably, the surfaces of the outer ring, the inner ring, the balls, the rolling roller shaft and the rotating columns are formed with a composite wear-resistant layer after being sprayed and sintered with nano and rare earth ceramic materials.

[0019] Through the above technical solution, the composite wear-resistant layer can significantly improve the service life of key components and reduce the frequency of replacement and maintenance.

[0020] The technical effects of the present utility model are mainly reflected in the following aspects:

[0021] 1. By changing the cage to a rolling roller shaft and a positioning frame, the present utility model changes the sliding friction into rolling friction, reduces the situation where the sliding friction force increases sharply due to centrifugal force, and further reduces the situation where the bearing is damaged during ultra-high-speed operation;

[0022] 2. By rotatably connecting the rolling roller shaft to the internal space of the positioning frame through a rotating column, the present utility model defines the friction form between the rolling roller shaft and the positioning frame as rolling friction;

[0023] 3. By arranging an oil column and opening an oil and gas hole in the rolling roller shaft, the present utility model enhances the lubrication ability during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a partial structure of an embodiment of the present application;

[0026] Figure 3 is a schematic cross-sectional view of the connection between the rolling roller shaft and the positioning frame in an embodiment of the present application.

[0027] Reference numerals: 1, inner ring; 2, outer ring; 3, ball; 4, groove; 5, rolling roller shaft; 51, rotating column; 52, oil column; 53, oil and gas hole; 6, positioning frame; 61, installation groove; 62, internal space; 63, rotating groove; 64, oil guiding groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will be further described in detail in conjunction with the attached Figures 1 - 3 , so as to make the technical solution of the present utility model easier to understand and master.

[0029] An embodiment of the present application discloses a super-high-speed angular contact bearing:

[0030] Referring to Figures 1 - 2, A super-high-speed angular contact bearing, comprising an inner ring 1, an outer ring 2 and a plurality of balls 3. The plurality of balls 3 are in rolling contact between the outer ring 2 and the inner ring 1, and grooves 4 for fitting the balls 3 are respectively formed on the inner ring 1 and the outer ring 2; It further includes a plurality of rolling rollers 5 and a positioning frame 6. A rolling roller 5 is in rolling contact between two adjacent balls 3. The rolling roller 5 is cylindrical, and both sides of the rolling roller 5 are rotatably connected to the positioning frame 6. The positioning frame 6 is installed between the outer ring 2 and the inner ring 1 and is concentric with the outer ring 2 and the inner ring 1; The positioning frame 6 is also provided with mounting grooves 61 having the same number as the balls 3, and there is a gap between the mounting grooves 61 and the balls 3, so as to avoid the jamming phenomenon caused by too small a gap between the balls 3 and the mounting grooves 61.

[0031] The rolling friction between the balls 3 and the cage is changed into rolling friction by using the rolling rollers 5, thereby reducing the situation where the sliding friction force increases sharply due to centrifugal force, and further reducing the situation where the bearing is damaged during super-high-speed operation. There are gaps between the positioning frame 6 and the outer ring 2 and the inner ring 1 to prevent friction between the positioning frame 6 and the outer ring 2 and the inner ring 1 from affecting the working stability of the bearing. And the distances from the centers of the balls 3 and the rolling rollers 5 to the center of the bearing should be the same to avoid uneven distribution of the forces bearing external actions or different centrifugal force magnitudes at different places, which may cause damage to the components.

[0032] Refer to Figure 3 , The positioning frame 6 is annular and is provided with an internal space 62. The internal space 62 is communicated with the mounting grooves 61 to facilitate the circulation of lubricating oil when replenishing lubricating oil; The rolling roller 5 is installed in the internal space 62. Rotating columns 51 are fixed at both ends of the rolling roller 5. The rolling roller 5 is rotatably inserted into the positioning frame 6 through the rotating columns 51 at both ends; The rolling roller 5 only contacts the two adjacent balls 3 on both sides, and there are gaps between the rolling roller 5 and the positioning frame 6, the outer ring 2 and the inner ring 1. The friction between the rolling roller 5 and the positioning frame 6 is also changed into rolling friction by using the rotating columns 51, thereby reducing the situation where the bearing is damaged during super-high-speed operation due to the contact mode between the rolling roller 5 and the positioning frame 6.

[0033] Refer to Figures 2 - 3, an oil column 52 is fixedly centered on the rolling roller 5. The oil column 52 is made of a fabric with strong oil absorption for adsorbing and storing lubricating oil. A large number of oil and gas holes 53 are provided on the outer peripheral surface of the rolling roller 5, and the large number of oil and gas holes 53 communicate the oil column 52 with the outside space. During ultra-high-speed movement, due to the influence of centrifugal force and temperature, the lubricating oil stored in the oil column 52 becomes oil and gas and escapes outward through the oil and gas holes 53, thereby enhancing the lubrication degree between the outer peripheral surface of the rolling roller 5 and the balls 3 that are in contact with the outer peripheral surface of the rolling roller 5. Both ends of the oil column 52 penetrate through the rotating column 51 and abut against the positioning frame 6 respectively. At the same time, oil and gas holes 53 are also provided on the outer peripheral surface of the rotating column 51 to communicate the oil column 52 with the outside space, so that the lubricating oil stored in the oil column 52 becomes oil and gas under the influence of centrifugal force and temperature to enhance the lubrication effect between the rotating column 51 and the positioning frame 6.

[0034] At the same time, the surfaces of the outer ring 2, the inner ring 1, the balls 3, the rolling roller 5 and the rotating column 51 are formed with a composite wear-resistant layer after being sprayed and sintered with nano and rare earth ceramic materials. The composite wear-resistant layer can significantly improve the service life of key components and reduce the frequency of replacement and maintenance.

[0035] Refer to Figure 3 , a rotating groove 63 for installing the rotating column 51 is provided in the internal space 62, and an oil guiding groove 64 that expands obliquely toward the rotating column 51 is also provided on the rotating groove 63. The oil guiding groove 64 will collect the lubricating oil flowing due to centrifugal force and temperature here. When the amount is small, it will enhance the lubrication effect outside the rotating column 51; while when the amount is excessive, it will replenish the lubricating oil in the oil column 52 in the reverse direction. At the same time, an oil guiding ring groove can also be provided in the internal space 62 to further enhance the effect of guiding the lubricating oil. When it is necessary to replenish the lubricating oil after the work is completed, only need to slowly rotate the positioning frame 6 while dripping the lubricating oil into the installation groove 61.

[0036] Of course, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A super-high-speed angular contact bearing, comprising an inner ring (1), an outer ring (2) and a plurality of balls (3), the plurality of balls (3) are in rolling contact between the outer ring (2) and the inner ring (1), and grooves (4) for mating with the balls (3) are respectively formed on the inner ring (1) and the outer ring (2); characterized in that, It further includes a plurality of rolling rollers (5) and a positioning frame (6). A rolling roller (5) rolls between two adjacent balls (3) in a fitting manner. Both sides of the rolling roller (5) are rotatably connected to the positioning frame (6); the positioning frame (6) is installed between the outer ring (2) and the inner ring (1), and is concentric with the outer ring (2) and the inner ring (1); the positioning frame (6) is further provided with mounting grooves (61) having the same number as the balls (3), and there is a gap between the mounting grooves (61) and the balls (3).

2. The super-high-speed angular contact bearing according to claim 1, characterized in that, The positioning frame (6) is in a circular ring shape and is provided with an internal space (62), and the internal space (62) is communicated with the mounting grooves (61); the rolling roller (5) is installed in the internal space (62), and rotating columns (51) are fixed at both ends of the rolling roller (5). The rolling roller (5) is rotatably inserted into the positioning frame (6) through the rotating columns (51) at both ends; the rolling roller (5) only contacts the adjacent balls (3) on both sides, and there are gaps between the rolling roller (5) and the positioning frame (6), the outer ring (2) and the inner ring (1).

3. The super-high-speed angular contact bearing according to claim 2, characterized in that, An oil column (52) is arranged at the center of the rolling roller (5), and a large number of oil and gas holes (53) are formed on the outer peripheral surface of the rolling roller (5), and the large number of oil and gas holes (53) communicate the oil column (52) with the external space.

4. The super-high-speed angular contact bearing according to claim 3, wherein Both ends of the oil column (52) respectively penetrate through the rotating columns (51) and abut against the positioning frame (6). At the same time, oil and gas holes (53) are also formed on the outer peripheral surface of the rotating columns (51) for communicating the oil column (52) with the external space.

5. The angular contact bearing with ultra-high speed according to claim 2, characterized in that, The internal space (62) is provided with a rotating groove (63) for installing the rotating column (51), and an oil guiding groove (64) which is inclined and enlarged towards one side of the rotating column (51) is further formed on the rotating groove (63).

6. The super-high-speed angular contact bearing according to claim 1, characterized in that, There are gaps between the positioning frame (6) and the outer ring (2) and the inner ring (1).

7. The super-high-speed angular contact bearing according to claim 1, wherein, The surfaces of the outer ring (2), the inner ring (1), the balls (3), the rolling rollers (5) and the rotating columns (51) are formed with a composite wear-resistant layer after being sprayed and sintered with nano and rare earth ceramic materials.

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