Double-row spherical roller bearing

Abstract

The application discloses a double-row spherical roller bearing, which comprises an outer ring, an inner ring, a plurality of first spherical rollers and a plurality of second spherical rollers, a first raceway and a second raceway are arranged eccentrically on the outer peripheral wall of the inner ring, a plurality of first isolation blocks are evenly distributed in a ring shape on the first raceway, a first pocket is formed by surrounding the adjacent first isolation blocks, a second pocket is formed on the first isolation block, a plurality of second isolation blocks are evenly distributed in a ring shape on the second raceway, a third pocket is formed by surrounding the adjacent second isolation blocks, a fourth pocket is formed on the second isolation block, and the first isolation block and the second isolation block are integrally formed by polyether ether ketone material through an injection molding process. The application solves the problems of high cost of the whole brass retainer of the existing asymmetric double-row spherical roller bearing, easy failure of the retainer due to the additional stress caused by the force difference of the two rows of rollers, poor adhesion of the isolation block to the roller and insufficient guiding precision.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, specifically to a double-row spherical roller bearing. Background Technology

[0002] Asymmetric double-row spherical roller bearings, relying on two sets of raceways with different nominal contact angles on the inner ring, can be specifically matched to the long-term unidirectional off-center load operating conditions of equipment such as wind turbine main shafts. This improves the defects of concentrated load and excessive wear on one side of the raceway, leading to their increasingly widespread application in heavy-duty transmission equipment. Currently, however, there are still many unavoidable technical shortcomings in the cages used with these bearings, limiting their service life and production economics. First, traditional integral brass machined cages have high overall costs and low processing efficiency: Brass raw materials are expensive, and integral cages require multiple processing steps such as turning, milling, and drilling. The process is complex and the production cycle is long, resulting in a high scrap rate, which significantly increases the overall production cost of the bearing and is not conducive to large-scale market application. On the other hand, existing plastic cages mostly use ordinary nylon materials, which are prone to creep, cracking, and aging failure under high temperature, heavy load, and alternating impact conditions, and cannot be adapted to harsh working environments such as wind power.

[0003] Secondly, the integrated cage is prone to generating additional stress, leading to frequent bearing failures: a conventional single integrated cage simultaneously constrains two rows of spherical rollers. However, in an asymmetrical raceway structure, the nominal contact angles of the first and second raceways differ, resulting in significant differences in the radial and axial loads borne by the two rows of rollers. During operation, this continuously applies alternating bending moments and torsional loads to the integrated cage. Over long-term operation, the cage is prone to deformation, wear, and even breakage, becoming a core cause of premature bearing failure. Furthermore, existing segmented separators are mostly of a single-row uniform structure, unable to provide differentiated adaptation for two raceways with different contact angles, and thus cannot fundamentally eliminate the additional loads from the two rows of rollers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a double-row spherical roller bearing. It solves the problems of high cost of the integral brass cage, easy failure of the cage due to the force difference between the two rows of rollers, poor fit between the spacer block and the roller, and insufficient guiding accuracy of existing asymmetric double-row spherical roller bearings.

[0005] To achieve the above objectives, the present invention provides a double-row spherical roller bearing, comprising an outer ring, an inner ring, a plurality of first spherical rollers, and a plurality of second spherical rollers. A first raceway and a second raceway are eccentrically disposed on the outer peripheral wall of the inner ring. The nominal contact angle of the first raceway is greater than the nominal contact angle of the second raceway. The first spherical rollers are disposed on the first raceway, and the second spherical rollers are disposed on the second raceway. A plurality of first spacer blocks are evenly distributed circumferentially on the first raceway, and a first pocket is formed between adjacent first spacer blocks. A [missing information - likely a type of opening] is provided on the first spacer block. The second pocket has a portion of the first spherical rollers disposed in several first pockets, and another portion of the first spherical rollers disposed in several second pockets. Several second isolation blocks are evenly distributed circumferentially on the second raceway. A third pocket is formed between adjacent second isolation blocks. A fourth pocket is provided on the second isolation block, with a portion of the second spherical rollers disposed in several third pockets and another portion of the second spherical rollers disposed in several fourth pockets. The first and second isolation blocks are both integrally formed from polyetheretherketone material using an injection molding process.

[0006] The advantages of adopting the above technical solution are as follows: The independently arranged first and second isolation blocks correspond to the first and second spherical rollers respectively, forming a split pocket structure that can simultaneously bear the corresponding rollers. The first and second isolation blocks are molded from a single injection-molded polyetheretherketone material, and are independent of each other without any linkage constraints. This avoids the problem of additional bending moments and torsional loads caused by the load difference between the first and second spherical rollers in an integrated cage, thereby reducing the probability of deformation and fracture failure of the isolation structure. The pockets, which divide the space to accommodate the corresponding rollers, can stably separate the first and second spherical rollers. To prevent interference between rollers, the above injection molding process simplifies the processing flow, eliminates multiple turning steps for the brass cage, and reduces raw material and processing costs, thereby shortening the production cycle and making it suitable for mass industrial production. The polyetheretherketone (PEEK) substrate itself has excellent high temperature resistance, creep resistance, and aging resistance, making it suitable for long-term heavy load and high temperature alternating conditions of wind turbine main shafts, thus extending the overall service life of the bearing. The above technology forms an independent isolation structure by matching the first raceway with the first isolation block and the second raceway with the second isolation block, thereby matching the first raceway and the second raceway with different nominal contact angles, adapting to unidirectional off-center load operation conditions, and thus fully releasing the asymmetric raceway load to optimize performance.

[0007] The present invention further comprises: the inner walls on both sides of the second pocket and the outer walls at both ends of the first isolation block are provided with a first arc surface adapted to the outer surface of the first spherical roller; the inner walls on both sides of the fourth pocket and the outer walls at both ends of the second isolation block are provided with a second arc surface adapted to the outer surface of the second spherical roller.

[0008] The advantages of adopting the above technical solution are as follows: In the above technology, the first arc surface and the second arc surface respectively match the outer contour surfaces of the first spherical roller and the second spherical roller. The first arc surface is simultaneously disposed on the inner walls of both sides of the second pocket of the first isolation block and on the outer wall of the end of the first isolation block, while the second arc surface is simultaneously disposed on the inner wall of the fourth pocket of the second isolation block and on the outer wall of the end of the second isolation block. The first arc surfaces at the ends of adjacent first isolation blocks can cooperate to form a space for the first spherical roller to be accommodated, i.e., forming the first pocket. Similarly, the second arc surfaces at the ends of adjacent second isolation blocks can cooperate to form a space for the second spherical roller to be accommodated, i.e., forming the third pocket. Through the arrangement of the first and second arc surfaces, the first spherical roller can be constrained in all directions. The first and second spherical rollers are designed to improve the circumferential and radial guiding accuracy of the first and second spherical rollers, thereby suppressing wobble and slippage during their operation. The aforementioned arc-shaped contact replaces the traditional planar point-line contact, dispersing the contact stress of the first and second spherical rollers and preventing stress concentration at their edges from causing raceway and roller peeling and wear. At the same time, the arc surface perfectly matches the outer surface contour of the corresponding roller, eliminating local gaps between the first and second isolators and the first and second spherical rollers, thereby improving the high-speed operation stability of the bearing, reducing vibration and noise, and enhancing the self-aligning stability of the bearing, making it suitable for long-term continuous heavy-load operation scenarios.

[0009] The present invention further comprises: the radius of curvature of the first arc surface is set to be the same as the radius of curvature of the outer surface of the first spherical roller, and the effective contact area between the first arc surface and the first spherical roller is not less than 15% of the outer surface area of ​​the first spherical roller; the radius of curvature of the second arc surface is set to be the same as the radius of curvature of the outer surface of the second spherical roller, and the effective contact area between the second arc surface and the second spherical roller is not less than 15% of the outer surface area of ​​the second spherical roller.

[0010] The advantages of adopting the above technical solution are as follows: In the above technology, the radius of curvature of the first arc surface is consistent with the curvature of the outer surface of the first spherical roller, and the radius of curvature of the second arc surface is consistent with the curvature of the outer surface of the second spherical roller, thereby achieving full-area contact between the corresponding curved surfaces. The effective contact area limitation range can ensure that the outer walls of the first and second spherical rollers bear pressure over a large area, thereby avoiding stress concentration damage caused by local small-area contact. The above-mentioned full-area contact structure evenly disperses the radial and axial loads borne by the first and second spherical rollers, thereby reducing local pitting and wear defects of the corresponding rollers. The sufficient contact area enhances the limiting and guiding ability of the first and second isolation blocks for the first and second spherical rollers, thereby limiting the axial and radial displacement of the corresponding rollers and maintaining the stable meshing state of the rolling pair. The above-mentioned unified curvature matching structure simplifies the mold design of the isolation block, so that the arc surface of the first and second isolation blocks does not need to be ground again after molding, reducing the processing steps and scrap rate.

[0011] The present invention further provides that: the inclination angle of the first arc surface is adapted to the nominal contact angle of the first raceway, and the inclination angle of the second arc surface is adapted to the nominal contact angle of the second raceway.

[0012] The advantages of adopting the above technical solution are: the tilt angle of the first arc surface is adapted to the nominal contact angle of the first raceway, and the tilt angle of the second arc surface is adapted to the nominal contact angle of the second raceway, so that the force direction of the arc surface is consistent with the actual load transmission direction of the first spherical roller and the second spherical roller. When an external load is applied, the load can be evenly transmitted to the overall structure of the first and second isolation blocks along the corresponding arc surface, avoiding local unilateral cracking of the arc surface. The angle matching structure formed by the above technology makes the force direction of the first spherical roller, the second spherical roller, the corresponding isolation block, and the inner and outer raceways coordinated and unified, eliminating additional shear stress between the contact pairs, thereby reducing the wear rate of the rolling pair.

[0013] The present invention further includes: a grease storage groove is recessed on both the first arc surface and the second arc surface.

[0014] The advantages of adopting the above technical solution are as follows: In the above technology, the first and second arc surfaces are recessed to form grease storage grooves, which are directly connected to the contact areas of the first and second spherical rollers. During the assembly stage, grease can be pre-filled so that during the bearing operation, the grease can be continuously delivered along the grease storage grooves to the contact friction pairs between the first and second spherical rollers and the raceway, thereby achieving long-term continuous oil supply lubrication. The grease storage grooves are distributed on the arc contact surfaces, and the lubricating medium acts directly on the friction core areas of the first and second spherical rollers, thereby weakening dry friction wear and reducing the probability of pitting and peeling failures of the rolling pair.

[0015] The present invention further comprises: a first limiting stop edge protruding from the outer diameter of the first isolation block, a second limiting stop edge protruding from the outer diameter of the second isolation block, and a convex ring circumferentially formed at the center of the outer peripheral wall of the inner ring, wherein a plurality of the first limiting stop edges and a plurality of the second limiting stop edges are all arranged in contact with the outer peripheral wall surface of the convex ring.

[0016] The advantages of adopting the above technical solution are as follows: In the above technology, the outer diameter of the first isolation block is provided with a first limiting stop, and the outer diameter of the second isolation block is provided with a second limiting stop. Through the fit and cooperation of the first limiting stop and the second limiting stop with the outer wall of the inner ring center convex ring, a radially inward limiting structure for the first isolation block and the second isolation block is constructed, which restricts the radial displacement of the first isolation block and the second isolation block, thereby avoiding the roller jamming damage caused by the first isolation block squeezing the first spherical roller inward and the second isolation block squeezing the second spherical roller inward. The above-mentioned synchronous radial positioning of the first isolation block and the second isolation block is achieved by relying on the integrated convex ring of the inner ring, without the need to add additional independent limiting parts, simplifying the overall assembly structure of the bearing, reducing the number of parts, and thus reducing the assembly difficulty and manufacturing cost.

[0017] The present invention further includes a first adjusting block for inserting a first raceway when the number of a plurality of first spherical rollers is odd, and a second adjusting block for inserting a second raceway when the number of a plurality of second spherical rollers is odd. The first adjusting block and a plurality of first isolation blocks are combined to form a first annular partition structure, and the second adjusting block and a plurality of second adjusting blocks are combined to form a second annular partition structure. The shape of the first adjusting block is adapted to the shape of the first isolation block, and the shape of the second adjusting block is adapted to the shape of the second isolation block.

[0018] The advantages of adopting the above technical solution are: The above technology includes a first adjusting block adapted to the first raceway and a second adjusting block adapted to the second raceway. When the number of first spherical rollers is odd, the first adjusting block and the first isolation block combine to form a complete annular separation structure. Similarly, when the number of second spherical rollers is odd, the second adjusting block and the second isolation block combine to form a complete annular separation structure. Furthermore, the shape of the first adjusting block matches the shape of the first isolation block, and the shape of the second adjusting block matches the shape of the second isolation block, allowing for flexible compensation of circumferential assembly gaps. This ensures that all first and second spherical rollers are evenly arranged circumferentially, eliminating the need for reassembly. A completely new main structure for the isolation block is designed to improve the versatility and adaptability of the first and second isolation blocks, covering both odd and even numbers of rollers. The first and second adjustment blocks are assembled separately with the corresponding isolation blocks, allowing for flexible selection of adjustment blocks according to different bearing specifications. This reduces the types of molds needed and lowers mold R&D investment. Furthermore, the independent adjustment blocks do not alter the original pockets and arc fitting structure of the first and second isolation blocks, preserving all performance characteristics of precise guidance and long-term lubrication for the first and second spherical rollers, and achieving clearance compensation. This balances structural versatility with bearing operational stability.

[0019] The present invention further provides that: the axial thickness of the first adjusting block is 1-1.8 times the axial thickness of the first isolation block, and the axial thickness of the second adjusting block is 1-1.8 times the axial thickness of the second isolation block.

[0020] The advantages of adopting the above technical solution are: the axial thickness of the first adjustment block and the second adjustment block is limited to a certain range, so that the thickness range can be adapted to the different circumferential clearance compensation requirements caused by different numbers of the first spherical rollers and the second spherical rollers. Moreover, the thickness range setting can cover the assembly clearance of most standard specification asymmetric double-row spherical roller bearings, without the need to customize non-standard thickness first adjustment blocks and second adjustment blocks separately, thereby broadening the product's compatibility range.

[0021] The present invention further specifies that the polyetheretherketone material used to prepare the first and second isolation blocks is a reinforced polyetheretherketone material with 10-30% carbon fiber or glass fiber by mass.

[0022] The advantages of adopting the above technical solution are as follows: In the above technology, the polyetheretherketone (PEEK) substrate used to prepare the first and second isolation blocks is internally reinforced with a corresponding proportion of carbon fiber or glass fiber. This fiber reinforcement significantly improves the overall structural strength, rigidity, and impact resistance of the first and second isolation blocks, effectively resisting cracking and deformation defects under heavy alternating impact loads. Furthermore, the fiber filler optimizes the wear resistance of the substrate, reducing reciprocating friction loss between the first isolation block and the first spherical roller, and between the second isolation block and the second spherical roller, thus extending the service life of the first and second isolation blocks. The reinforced substrate also enhances creep resistance under high-temperature conditions, preventing plastic deformation of the first and second isolation blocks under high-temperature operating conditions of the wind power equipment, thereby stably maintaining the separation and limiting effect on the first and second spherical rollers.

[0023] The present invention further provides that the characteristic parameters of the first spherical roller are set to be consistent with those of the second spherical roller, and the characteristic parameters include the outer diameter parameter of the spherical roller, the radius of curvature parameter of the spherical roller, and the length parameter of the roller.

[0024] The advantages of adopting the above technical solution are as follows: All characteristic parameters of the first and second spherical rollers are unified, and the same standard spherical rollers are used, eliminating the need to customize non-standard sized rollers for the first and second raceways. This reduces the number of roller molds required and lowers the processing, warehousing, and spare parts procurement costs for the first and second spherical rollers. Furthermore, the unified specification rollers enable interchangeable parts, eliminating the need to distinguish between the first and second spherical rollers during bearing assembly, simplifying assembly procedures and improving assembly efficiency. Simultaneously, the mature mass production of standard rollers ensures higher dimensional accuracy and consistency in spherical curvature, guaranteeing a uniform fit between the first and second spherical rollers and the first arc surface, and between the second and second arc surfaces, thus balancing the wear rates of the first and second spherical rollers. Attached Figure Description

[0025] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a three-dimensional view of the present invention after removing the outer ring; Figure 3 This is a side sectional view of the present invention; Figure 4 This is a three-dimensional view of the first isolation block in this invention; Figure 5 This is a three-dimensional view of the second isolation block in this invention. Detailed Implementation

[0026] This invention provides a double-row spherical roller bearing, comprising an outer ring 1, an inner ring 2, a plurality of first spherical rollers 11, and a plurality of second spherical rollers 12. A first raceway 21 and a second raceway 22 are eccentrically arranged on the outer peripheral wall of the inner ring 2. The nominal contact angle of the first raceway 21 is greater than the nominal contact angle of the second raceway 22. The first spherical rollers 11 are disposed on the first raceway 21, and the second spherical rollers 12 are disposed on the second raceway 22. A plurality of first isolation blocks 3 are evenly distributed circumferentially on the first raceway 21, and a first pocket 31 is formed between adjacent first isolation blocks 3. Second pockets 32 are formed on the first isolation blocks 3, with a portion of the first spherical rollers 11 disposed in the plurality of first pockets 31, and the other portion... The first spherical rollers 11 are distributed in a plurality of second pockets 32. A plurality of second isolation blocks 4 are evenly distributed circumferentially on the second raceway 22. A third pocket 41 is formed between adjacent second isolation blocks 4. A fourth pocket 42 is provided on the second isolation block 4. A portion of the second spherical rollers 12 are distributed in a plurality of third pockets 41, and another portion of the second spherical rollers 12 are distributed in a plurality of fourth pockets 42. The first isolation block 3 and the second isolation block 4 are both integrally formed from polyetheretherketone material by injection molding. The inner walls on both sides of the second pocket 32 ​​and the outer walls at both ends of the first isolation block 3 are provided with a first arc surface 33 for adapting to the outer surface of the first spherical roller 11. The inner walls on both sides of the fourth pocket 42 and the outer walls at both ends of the second isolation block 4 are provided with a first arc surface 33. The outer walls are each provided with a second arc surface 43 adapted to the outer surface of the second spherical roller 12. The radius of curvature of the first arc surface 33 is the same as the radius of curvature of the outer surface of the first spherical roller 11. The effective contact area between the first arc surface 33 and the first spherical roller 11 is not less than 15% of the outer surface area of ​​the first spherical roller 11. The radius of curvature of the second arc surface 43 is the same as the radius of curvature of the outer surface of the second spherical roller 12. The effective contact area between the second arc surface 43 and the second spherical roller 12 is not less than 15% of the outer surface area of ​​the second spherical roller 12. The inclination angle of the first arc surface 33 is adapted to the nominal contact angle of the first raceway 21. The inclination angle of the second arc surface 43 is adapted to the nominal contact angle of the second raceway 21. The nominal contact angle of the rollers is adapted to each other. Grease reservoirs 13 are recessed on both the first arc surface 33 and the second arc surface 43. A first limiting flange 34 protrudes from the outer diameter of the first isolation block 3, and a second limiting flange 44 protrudes from the outer diameter of the second isolation block 4. A convex ring 23 is circumferentially formed at the center of the outer peripheral wall of the inner ring 2. Several first limiting flanges 34 and several second limiting flanges 44 are in contact with the outer peripheral wall surface of the convex ring 23. The system also includes a first adjusting block 5 for inserting the first raceway 21 when the number of several first spherical rollers 11 is odd, and a second adjusting block 6 for inserting the second raceway 22 when the number of several second spherical rollers 12 is odd. The first adjusting block 5 and several first isolation blocks 3 combine to form a first annular partition structure.The second adjusting block 6, combined with several other second adjusting blocks 6, forms a second annular partition structure. The shape of the first adjusting block 5 is adapted to the shape of the first isolation block 3, and the shape of the second adjusting block 6 is adapted to the shape of the second isolation block 4. The axial thickness of the first adjusting block 5 is 1-1.8 times the axial thickness of the first isolation block 3, and the axial thickness of the second adjusting block 6 is 1-1.8 times the axial thickness of the second isolation block 4. The polyetheretherketone (PEEK) material used to prepare the first isolation block 3 and the second isolation block 4 is a reinforced PEEK material with 10-30% carbon fiber or glass fiber by mass. The characteristic parameters of the first spherical roller 11 and the second spherical roller 12 are set to be consistent, including the outer diameter parameter of the spherical roller, the radius of curvature parameter of the spherical surface, and the roller length parameter.

[0027] In the aforementioned technology, the first adjusting block completely replicates the shape and fit structure of the first isolation block. Its surface is provided with a first arc surface and a grease reservoir that are completely consistent with the specifications and contour of the first isolation block. This allows the first arc surface on the first isolation block to completely fit with the outer wall of the first spherical roller, and the grease reservoir can continuously store and supply lubricating medium to the friction pair of the first spherical roller. The second adjusting block completely replicates the fit structure of the second isolation block. It is provided with a second arc surface and a grease reservoir that are consistent with the configuration of the second isolation block. This allows the second arc surface on the second adjusting block to adapt to the outer contour surface of the second spherical roller, and the grease reservoir can retain grease for a long time and continuously supply it to the contact area between the second spherical roller and the raceway.

[0028] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A double-row spherical roller bearing, comprising an outer ring, an inner ring, a plurality of first spherical rollers, and a plurality of second spherical rollers, wherein a first raceway and a second raceway are eccentrically disposed on the outer peripheral wall of the inner ring, the nominal contact angle of the first raceway is greater than the nominal contact angle of the second raceway, the first spherical rollers are disposed on the first raceway, and the second spherical rollers are disposed on the second raceway, characterized in that: The first raceway has a plurality of first isolation blocks evenly distributed circumferentially, and a first pocket is formed between adjacent first isolation blocks. The first isolation blocks have second pockets, in which a portion of the first spherical rollers are disposed in the plurality of first pockets and another portion of the first spherical rollers are disposed in the plurality of second pockets. The second raceway has a plurality of second isolation blocks evenly distributed circumferentially, and a third pocket is formed between adjacent second isolation blocks. The second isolation blocks have fourth pockets, in which a portion of the second spherical rollers are disposed in the plurality of third pockets and another portion of the second spherical rollers are disposed in the plurality of fourth pockets. The first isolation blocks and the second isolation blocks are both integrally formed from polyetheretherketone material by injection molding.

2. A double-row spherical roller bearing according to claim 1, characterized in that: The inner walls on both sides of the second pocket and the outer walls at both ends of the first isolation block are provided with a first arc surface adapted to the outer surface of the first spherical roller. The inner walls on both sides of the fourth pocket and the outer walls at both ends of the second isolation block are provided with a second arc surface adapted to the outer surface of the second spherical roller.

3. A double-row spherical roller bearing according to claim 2, characterized in that: The radius of curvature of the first arc surface is set to be consistent with the radius of curvature of the outer surface of the first spherical roller, and the effective contact area between the first arc surface and the first spherical roller is not less than 15% of the outer surface area of ​​the first spherical roller. The radius of curvature of the second arc surface is set to be consistent with the radius of curvature of the outer surface of the second spherical roller, and the effective contact area between the second arc surface and the second spherical roller is not less than 15% of the outer surface area of ​​the second spherical roller.

4. A double-row spherical roller bearing according to claim 2, characterized in that: The inclination angle of the first arc surface is adapted to the nominal contact angle of the first raceway, and the inclination angle of the second arc surface is adapted to the nominal contact angle of the second raceway.

5. A double-row spherical roller bearing according to claim 2, characterized in that: Both the first and second arc surfaces have grease-retaining grooves.

6. A double-row spherical roller bearing according to claim 1, characterized in that: The first isolation block has a first limiting stop protruding on its outer diameter, and the second isolation block has a second limiting stop protruding on its outer diameter. A convex ring is circumferentially opened at the center of the outer peripheral wall of the inner ring. Several first limiting stops and several second limiting stops are all arranged in contact with the outer peripheral wall surface of the convex ring.

7. A double-row spherical roller bearing according to claim 1, characterized in that: It also includes a first adjusting block for inserting into a first raceway when the number of a plurality of first spherical rollers is odd, and a second adjusting block for inserting into a second raceway when the number of a plurality of second spherical rollers is odd. The first adjusting block and a plurality of first isolation blocks are combined to form a first annular partition structure, and the second adjusting block and a plurality of second adjusting blocks are combined to form a second annular partition structure. The shape of the first adjusting block is adapted to the shape of the first isolation block, and the shape of the second adjusting block is adapted to the shape of the second isolation block.

8. A double-row spherical roller bearing according to claim 7, characterized in that: The axial thickness of the first adjusting block is 1-1.8 times the axial thickness of the first isolation block, and the axial thickness of the second adjusting block is 1-1.8 times the axial thickness of the second isolation block.

9. A double-row spherical roller bearing according to claim 1, characterized in that: The polyetheretherketone material used to prepare the first and second isolation blocks is a reinforced polyetheretherketone material with 10-30% carbon fiber or glass fiber by mass.

10. A double-row spherical roller bearing according to claim 1, characterized in that: The characteristic parameters of the first spherical roller are set to be consistent with those of the second spherical roller. The characteristic parameters include the outer diameter parameter of the spherical roller, the radius of curvature parameter of the spherical roller, and the length parameter of the roller.

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