A combined slewing bearing

Abstract

This invention relates to a combined self-aligning roller bearing, solving the problems of conventional bearings with evenly distributed circumferential roller assemblies being unable to support large assemblies and having short service life. The technical solution includes an inner ring and an outer ring arranged coaxially, and several bearings disposed between the inner and outer rings. The bearings are characterized by comprising at least one set of double-row self-aligning roller bearings and several single-row self-aligning roller bearings. The double-row self-aligning roller bearings are fixed to the top of the inner ring, and the single-row self-aligning roller bearings are symmetrically distributed on both sides of the double-row self-aligning roller bearings. Its effect is that the double-row self-aligning roller bearings are located at the top, and the single-row self-aligning roller bearings with gradually increasing spacing are arranged on both sides of the double-row self-aligning roller bearings. This makes the upper half of the combined self-aligning roller bearing larger than the lower half, effectively supporting large assemblies and improving the service life of the combined self-aligning roller bearing.

Description

Technical Field

[0001] This invention relates to a bearing, and more particularly to a combined self-aligning roller bearing. Background Technology

[0002] For some large assemblies with central shaft holes, their large size and weight, coupled with the difficulty in guaranteeing machining and assembly precision, lead to deviations in the roundness and axial position of the central shaft hole compared to the roundness and axial position of the bearing assembled within it. Consequently, the weight of the large assembly presses down on top of the bearing. In conventional bearings, the rollers supporting the outer ring are distributed circumferentially. When a large assembly presses down on the bearing's outer ring, the weight is primarily borne by the upper rollers, which are prone to excessive wear or breakage, leading to bearing failure. This significantly impacts the lifespan of conventional bearings and also affects the efficiency of equipment operation, as bearing failures frequently cause downtime for maintenance. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned problems of the prior art by providing a combined self-aligning roller bearing suitable for large assemblies. This bearing is installed in the shaft hole of the large assembly to support it. Because large assemblies are large in size and weight, and have poor machining and assembly precision, the weight of the large assembly mainly rests on the upper end of the combined self-aligning roller bearing. The double-row self-aligning roller bearing has excellent load-bearing capacity and is positioned precisely at the upper end, achieving the purpose of supporting the large assembly. This effectively solves the problems of easy bearing damage and difficulty in operating large assemblies in the prior art.

[0004] The above-mentioned technical objectives of this invention are mainly achieved through the following technical solutions: A combined self-aligning roller bearing includes an inner ring and an outer ring coaxially arranged, and a plurality of bearings disposed between the inner and outer rings. The bearings are characterized by comprising at least one set of double-row self-aligning roller bearings and a plurality of single-row self-aligning roller bearings arranged circumferentially. The double-row self-aligning roller bearings are fixed to the top of the inner ring, and the single-row self-aligning roller bearings are symmetrically distributed on both sides of the double-row self-aligning roller bearings. This technical solution is applicable to large assemblies and is installed in the shaft holes of large assemblies to support them. Due to the large size, heavy weight, and poor machining and assembly precision of large assemblies, the weight of the large assemblies mainly rests on the upper end of the combined self-aligning roller bearings. The double-row self-aligning roller bearings have excellent load-bearing capacity and are positioned precisely at the upper end, achieving the purpose of supporting the assemblies. This effectively solves the problems of easy bearing damage and difficulty in operating large assemblies in existing technologies, ensuring smooth operation of large assemblies and improving the service life of the combined self-aligning roller bearings.

[0005] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures: the spacing between adjacent single-row self-aligning roller bearings on each side of the double-row self-aligning roller bearing gradually increases from top to bottom. The purpose of this technical solution is that the double-row self-aligning roller bearing is located at the top, and single-row self-aligning roller bearings with gradually increasing spacing are respectively arranged on both sides of the double-row self-aligning roller bearing. Furthermore, the number of self-aligning roller bearings in the upper half of the combined self-aligning roller bearing is greater than the number in the lower half, further enhancing the effective support for large assemblies.

[0006] The preferred option is that adjacent single-row self-aligning roller bearings in the upper part of the combined self-aligning roller bearing, or adjacent single-row self-aligning roller bearings and double-row self-aligning roller bearings are arranged close together.

[0007] Further optimization involves providing at least six, or more than six, even numbers of single-row self-aligning roller bearings on both sides of the double-row self-aligning roller bearing, which is beneficial for balanced support of large assemblies.

[0008] To improve support, both the double-row self-aligning roller bearing and the single-row self-aligning roller bearing are fixed to the outer wall of the inner ring, and both are in line contact with the inner wall of the outer ring. This line contact also helps reduce contact stress.

[0009] The outer ring comprises several spliced ​​ring pieces, with the seam between adjacent ring pieces forming an angle of 5-15 degrees with the axis of the outer ring. This angle is beneficial for improving the service life of the composite self-aligning roller bearing because: if the angle of the sharp corner at the end of the ring piece is too large, the angle with the axis will be smaller. If the sharp corner reaches 90 degrees, the seam will be parallel to the axis (i.e., parallel to the horizontal line). When the self-aligning roller rolls over this seam, it is equivalent to crossing a bump, which will cause jumping and affect the operation of large components. If the angle of the sharp corner at the end of the ring piece is too small, the angle with the axis will be larger. Since the material of the ring piece is hard, if the sharp corner is too small, the end of the ring piece will have a very sharp point. When the self-aligning roller rolls over this sharp corner, it will generate great stress, and under the action of stress, the ring piece is prone to cracking. Therefore, the preferred solution is that the angle is about 10 degrees.

[0010] The inner wall of the ring is provided with oil channels, and each ring has at least two oil channels. Both oil channels are arc-shaped and coaxial with the outer ring, or the two oil channels are irregular curves that may or may not intersect. The oil channels facilitate lubrication of the self-aligning roller bearing components and reduce sliding friction. Regarding the shape of the oil channels, they are not limited to the shapes mentioned herein, provided that the strength of the ring is not affected.

[0011] The double-row self-aligning roller bearing includes two sets of self-aligning roller bearing main components with parallel axes, and support assemblies respectively disposed on both sides of the two sets of self-aligning roller bearing main components. The single-row self-aligning roller bearing includes a set of self-aligning roller bearing main components and support assemblies respectively disposed on both sides of the self-aligning roller bearing main components. The support assemblies are provided with radial adjustment components. The two ends of the rotating shaft on the self-aligning roller bearing main components are respectively disposed on the radial adjustment components on the corresponding sides. The radial adjustment components are used to adjust the radial position of the rotating shaft so that the outer ring on the self-aligning roller bearing main component forms line contact with the inner wall of the outer ring. The support assembly further includes a support base with an installation port. The radial adjustment assembly includes a wedge at the bottom of the installation port and a radial adjustment member on the wedge. The radial adjustment member has a shaft hole in its center, and the rotating shaft is disposed in the shaft hole. The radial adjustment member has a first inclined adjustment surface opposite to the shaft hole wall. The first inclined adjustment surface wedges with a second inclined adjustment surface on the wedge to adjust the radial position of the rotating shaft. For both double-row and single-row self-aligning roller bearings, the support base is a one-piece molded part, which helps ensure the overall assembly accuracy of each component. Furthermore, the height of the support base is less than the height of the main component of the self-aligning roller bearing, which helps avoid collision with the outer ring and also reduces the consumption of raw materials.

[0012] The self-aligning roller bearing main component includes a roller support frame mounted on the rotating shaft, two rows of self-aligning rollers mounted on the roller support frame, spacers on both sides of the roller support frame, the inner end of the spacers engaging with the side wall of the roller support frame, and the outer end of the spacers engaging with the inner wall of the radial adjustment component.

[0013] An adjusting shim is provided between the outer ring and the inner ring, and the thickness of the adjusting shim is at least 2mm (the thickness can be increased or decreased according to relevant parameters such as weight and diameter). In practical applications, there are two types of adjusting shims: a hard adjusting shim is used between the double-row self-aligning roller bearing and the inner ring, and a soft adjusting shim is used between the single-row self-aligning roller bearing and the inner ring.

[0014] The outer end of the rotating shaft is provided with a sealing plate, and the outer wall of the radial adjustment member is provided with a recess that matches the size of the sealing plate. The sealing plate is embedded in the recess and is fixed to the radial adjustment member by connection. The radial dimension of the radial adjustment member is smaller than the radial dimension of the self-aligning roller bearing main component.

[0015] To prevent the self-aligning roller bearing main component from colliding with the support base, a bullseye bearing is installed on the support base, with the rollers on the bullseye bearing facing the self-aligning roller bearing main component.

[0016] The beneficial effects of this invention are as follows: 1. Applicable to large assemblies (referring to large or extra-large rotating parts), and set in the shaft hole of the large assembly to support the large assembly. The double-row self-aligning roller bearing has a good load-bearing capacity and is set at the top to effectively support the large assembly. It effectively solves the problems of easy bearing damage and difficulty in operation of large assemblies in the existing technology, so that the large assembly can operate smoothly.

[0017] 2. Set up double-row self-aligning roller bearings and single-row self-aligning roller bearings. There should be at least six or more single-row self-aligning roller bearings, and they should be an even number. Set up the same number of single-row self-aligning roller bearings on both sides of the double-row self-aligning roller bearings. The single-row self-aligning roller bearings assist the double-row self-aligning roller bearings to effectively and evenly support large assemblies, and also help to improve the service life of the combined self-aligning roller bearings.

[0018] 3. Both the double-row self-aligning roller bearing and the single-row self-aligning roller bearing are in contact with the inner wall line of the outer ring, which improves the support effect.

[0019] 4. The outer ring comprises several spliced ​​ring pieces, and the seam between adjacent ring pieces forms an angle with the axis of the outer ring, the angle being 5 to 15 degrees. This not only helps to improve the service life of the combined self-aligning roller bearing, but also helps to ensure smoother operation of large assemblies.

[0020] 5. Oil passages are provided on the inner wall of the ring to lubricate the main components of the self-aligning roller bearing and reduce sliding friction. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of one structure of the present invention.

[0022] Figure 2 This is a schematic diagram of a single-row self-aligning roller bearing according to the present invention.

[0023] Figure 3 This is a schematic diagram of a double-row self-aligning roller bearing involved in this invention.

[0024] Figure 4 This is a cross-sectional structural schematic diagram of a single (double) row self-aligning roller bearing involved in the present invention.

[0025] Figure 5 and Figure 6 This is a schematic diagram of the structure of the two types of ring plates involved in this invention.

[0026] Figure 7 This invention relates to a structural schematic diagram of a combined self-aligning roller bearing equipped with large fittings.

[0027] In the diagram: 1. Inner ring; 2. Outer ring; 3. Double row self-aligning roller bearing; 4. Single row self-aligning roller bearing; 5. Ring plate; 6. Oil passage; 7. Support seat; 8. Wedge; 9. Radial adjusting element; 10. Shaft; 11. Self-aligning roller; 12. Spacer; 13. Outer ring; 14. Sealing plate; 15. Large assembly. Detailed Implementation

[0028] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0029] Example: Figures 1-7 As shown, a combined self-aligning roller bearing includes an inner ring 1 and an outer ring 2 arranged coaxially, and a plurality of bearings disposed between the inner ring 1 and the outer ring 2.

[0030] The main improvement of this technical solution lies in the following: the bearing includes at least one set of double-row self-aligning roller bearings 3 and several single-row self-aligning roller bearings 4 arranged circumferentially. The double-row self-aligning roller bearings 3 are fixed to the top of the inner ring 1, and the single-row self-aligning roller bearings 4 are symmetrically distributed on both sides of the double-row self-aligning roller bearings 3. This technical solution is applicable to large assembly parts 15 and is installed in the shaft hole of the large assembly parts 15 to support them. Due to the large size, heavy weight, and poor machining and assembly accuracy of the large assembly parts 15, the weight of the large assembly parts 15 mainly presses on the upper end of the combined self-aligning roller bearings. The double-row self-aligning roller bearings 3 have excellent load-bearing capacity and are positioned at the upper end to support the assembly parts. This effectively solves the problems of easy bearing damage and difficulty in operating the large assembly parts 15 in the prior art, making the large assembly parts 15 operate smoothly and also improving the service life of the combined self-aligning roller bearings.

[0031] The inner ring 1 here can be an annular ring, similar to the inner ring 1 of a regular bearing. Alternatively, it can be represented as a support beam (with a circular cross-section). When it is a support beam, two sets of spaced composite self-aligning roller bearings are installed on the support beam, with each set of composite self-aligning roller bearings supporting a large assembly 15.

[0032] The working principle of this technical solution is as follows: Double-row (single-row) self-aligning roller bearings (abbreviated as single-row self-aligning roller bearing 4 and double-row self-aligning roller bearing 3) are all mounted on the inner ring 1 (or support beam). The inner ring 1 (or support beam) is fixed, and the main self-aligning roller bearing component in the double-row (single-row) self-aligning roller bearing drives the outer ring 13 to rotate together. The outer ring 2 is mounted on the periphery of the double-row (single-row) self-aligning roller bearing, and the inner diameter of the outer ring 2 contacts the outer diameter line of the outer ring 13. The outer ring 2 rotates around the axis of the support beam. In the working or stopped state, the weight of the outer ring 2 and the large assembly 15 is borne by the double-row self-aligning roller bearing 3 at the top, while the single-row self-aligning roller bearings 4 on both sides provide auxiliary support. In theory, all eight sets of double-row (single-row) self-aligning roller bearings are in contact with the inner surface of the outer ring 2 and bear the load. However, in reality, due to the low machining and assembly precision of the large assembly 15, during operation, the top double-row self-aligning roller bearing 3 may bear the load while the two side single-row self-aligning roller bearings 4 may not bear the load. This situation also falls within the scope of protection required by this technical solution.

[0033] Further improvements and additions: The spacing between adjacent single-row self-aligning roller bearings 4 on each side of the double-row self-aligning roller bearing 3 gradually increases from top to bottom.

[0034] The purpose of this technical solution is to: place a double-row self-aligning roller bearing 3 at the top, and set single-row self-aligning roller bearings 4 with gradually increasing spacing on both sides of the double-row self-aligning roller bearing shaft. Moreover, the number of self-aligning roller bearings in the upper half of the combined self-aligning roller bearing is greater than the number of self-aligning roller bearings in the lower half, further enhancing the effective support for large assembly components 15.

[0035] The preferred embodiment is that adjacent single-row self-aligning roller bearings 4 in the upper half of the combined self-aligning roller bearing, or adjacent single-row self-aligning roller bearings 4 and double-row self-aligning roller bearings 3 are arranged close together.

[0036] Further optimization involves providing at least six single-row self-aligning roller bearings 4, or more than six in an even number, so that the same number of single-row self-aligning roller bearings 4 are provided on both sides of the double-row self-aligning roller bearing 3, which is beneficial for balanced support of large assembly parts 15.

[0037] To improve the supporting effect, both the double-row self-aligning roller bearing 3 and the single-row self-aligning roller bearing 4 are fixed to the outer wall of the inner ring 1, and both the double-row self-aligning roller bearing 3 and the single-row self-aligning roller bearing 4 are in line contact with the inner wall of the outer ring 2. Using line contact also helps to reduce contact stress.

[0038] The outer ring 2 comprises several spliced ​​ring pieces 5. The seam between adjacent ring pieces 5 forms an angle α with the axis of the outer ring 2, where the angle α is 5-15 degrees. This is beneficial for improving the service life of the combined self-aligning roller bearing because: if the angle of the sharp corner at the end of the ring piece 5 is too large, the angle with the axis will be smaller. If the sharp corner reaches 90 degrees, the seam will be parallel to the axis (i.e., parallel to the horizontal line). When the self-aligning roller rolls over this seam, it will be like crossing a bump, causing bounce, which will affect the operation of the large assembly 15. If the angle of the sharp corner at the end of the ring piece 5 is too small, the angle with the axis will be larger. Since the material of the ring piece 5 is hard, if the sharp corner is too small, the end of the ring piece 5 will have a very sharp point. When the self-aligning roller rolls over this sharp corner, it will generate great stress, and under the action of stress, the ring piece 5 is prone to cracking. Therefore, the preferred solution is that the angle is about 10 degrees.

[0039] To facilitate the production and processing of the outer ring 2 and improve the smoothness of the self-aligning rollers, setting eight ring pieces 5 is the preferred option. Of course, making appropriate minor adjustments to the number based on actual conditions is also a feasible option.

[0040] The inner wall of the ring plate 5 is provided with oil channels 6 (or oil grooves). Each ring plate 5 has at least two oil channels 6, both of which are arc-shaped and coaxial with the outer ring 2, or the two oil channels 6 are irregular curves that may or may not intersect. The oil channels 6 facilitate the lubrication of the self-aligning roller bearing main components and reduce sliding friction. Regarding the shape of the oil channels 6, they are not limited to the shapes mentioned herein, provided that the strength of the ring plate 5 is not affected.

[0041] In practical applications, the smaller and flatter the joint between the ring pieces 5, the better. The joint is often controlled to be less than or equal to 1mm. Therefore, fixing the ring piece 5 to the inner wall of the shaft hole of the large assembly 15 is the better solution. The ring piece 5 is a large thin-walled part, and there are many ways to fix the ring piece 5 to the large assembly 15. These are feasible for those skilled in the art, so they will not be elaborated here.

[0042] In practical applications, there are four sets of ring pieces 5, consisting of eight ring pieces 5 in both directions (dividing the outer ring 2 into eight equal parts), which are evenly distributed and installed. The number of equal parts can be varied. For example, for the outer ring 2 with a diameter of 2425mm, eight equal parts are more suitable. If there are fewer than eight equal parts, the ring pieces 5 will be too heavy. If there are more than eight equal parts, there will be too many seams, which will affect the operation of the self-aligning roller.

[0043] The double-row self-aligning roller bearing 3 includes two sets of self-aligning roller bearing main components with parallel axes, and support seat 7 assemblies respectively disposed on both sides of the two sets of self-aligning roller bearing main components. The single-row self-aligning roller bearing 4 includes a set of self-aligning roller bearing main components and support seat 7 assemblies respectively disposed on both sides of the self-aligning roller bearing main components. The support seat 7 assembly is provided with a radial adjustment assembly. The two ends of the rotating shaft 10 on the self-aligning roller bearing main component are respectively disposed on the radial adjustment assemblies on the corresponding two sides. The radial adjustment assembly is used to adjust the radial position of the rotating shaft 10 so that the outer sleeve 13 on the self-aligning roller bearing main component forms line contact with the inner wall of the outer ring 2. The support base 7 assembly further includes a support base 7 with an installation port. The radial adjustment assembly includes a wedge 8 disposed at the bottom of the installation port and a radial adjustment member 9 disposed on the wedge 8. The radial adjustment member 9 has a shaft hole in its middle, and the rotating shaft 10 is disposed in the shaft hole. The radial adjustment member 9 has a first inclined adjustment surface disposed opposite to the shaft hole wall. The first inclined adjustment surface wedges with a second inclined adjustment surface on the wedge 8 to adjust the radial position of the rotating shaft 10. For both the double-row self-aligning roller bearing 3 and the single-row self-aligning roller bearing 4, the support base 7 is an integrally formed part, which helps to ensure the overall assembly accuracy of each component. Furthermore, the height of the support base 7 is less than the height of the main component of the self-aligning roller bearing, which helps to avoid collision with the outer ring 2 and also helps to reduce the consumption of raw materials.

[0044] Moreover, in the actual production and processing process, the double row bearing assembly is actually formed by two single row bearing assemblies through an integrated support base 7. This production method is mainly to ensure installation accuracy and prevent angular deviation caused by installation from affecting the load-bearing capacity (the overall weight of the product is mainly borne by the two single row bearing assemblies in the double row bearing assembly).

[0045] The self-aligning roller bearing main component includes a roller support frame mounted on the rotating shaft 10, two rows of self-aligning rollers mounted on the roller support frame, and spacers 12 mounted on both sides of the roller support frame. The inner end of the spacer 12 engages with the side wall of the roller support frame, and the outer end of the spacer 12 engages with the inner wall of the radial adjustment member 9.

[0046] An adjusting shim is provided between the outer sleeve 13 and the inner ring 1. The thickness of the adjusting shim is at least 2mm (the thickness can be increased or decreased according to relevant parameters such as weight and diameter). In practical applications, there are two types of adjusting shims: a hard adjusting shim is used between the double-row self-aligning roller bearing 3 and the inner ring 1, and a soft adjusting shim is used between the single-row self-aligning roller bearing 4 and the inner ring 1.

[0047] The outer end of the rotating shaft 10 is provided with a sealing plate 14, and the outer wall of the radial adjustment member 9 is provided with a recess that matches the size of the sealing plate 14. The sealing plate 14 is embedded in the recess and is fixed to the radial adjustment member 9 by connection. The radial dimension of the radial adjustment member 9 is smaller than the radial dimension of the self-aligning roller bearing main component.

[0048] To prevent the self-aligning roller bearing main component from colliding with the support base 7, a bullseye bearing is installed on the support base 7, with the rollers on the bullseye bearing facing the self-aligning roller bearing main component.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A combined self-aligning roller bearing, comprising an inner ring (1) and an outer ring (2) coaxially arranged, and a plurality of bearings disposed between the inner ring (1) and the outer ring (2), characterized in that... The bearing includes at least one set of double-row self-aligning roller bearings (3) arranged circumferentially and several single-row self-aligning roller bearings (4). The double-row self-aligning roller bearings (3) are fixed to the top of the inner ring (1), and the single-row self-aligning roller bearings (4) are symmetrically distributed on both sides of the double-row self-aligning roller bearings (3). The double-row self-aligning roller bearing (3) includes two sets of self-aligning roller bearing main components with parallel axes, and support seats (7) assemblies respectively arranged on both sides of the two sets of self-aligning roller bearing main components. The single-row self-aligning roller bearing (4) includes a set of self-aligning roller bearing main components and support seats (7) assemblies respectively arranged on both sides of the self-aligning roller bearing main components. The support seats (7) assemblies are provided with radial adjustment components. The two ends of the rotating shaft (10) on the self-aligning roller bearing main components are respectively arranged on the radial adjustment components on the corresponding sides. The radial adjustment components are used to adjust the radial position of the rotating shaft (10) so that the outer sleeve (13) on the self-aligning roller bearing main components forms a line contact with the inner wall of the outer ring (2).

2. The combined self-aligning roller bearing according to claim 1, characterized in that... The spacing between adjacent single-row self-aligning roller bearings (4) located on each side of the double-row self-aligning roller bearing (3) gradually increases from top to bottom.

3. The combined self-aligning roller bearing according to claim 1 or 2, characterized in that... The double-row self-aligning roller bearing (3) and the single-row self-aligning roller bearing (4) are both fixed on the outer wall of the inner ring (1), and the double-row self-aligning roller bearing (3) and the single-row self-aligning roller bearing (4) are both in contact with the inner wall of the outer ring (2).

4. The combined self-aligning roller bearing according to claim 3, characterized in that... The outer ring (2) includes several spliced ​​ring pieces (5), and the splice between adjacent ring pieces (5) forms an angle with the axis of the outer ring (2), the angle being 5 to 15 degrees.

5. The combined self-aligning roller bearing according to claim 4, characterized in that... The inner wall of the ring (5) is provided with oil channels (6), and each ring (5) has at least two oil channels (6). Both oil channels (6) are arcs coaxial with the outer ring (2), or the two oil channels (6) are irregular curves that intersect or do not intersect.

6. The combined self-aligning roller bearing according to claim 1 or 2, characterized in that... The support base (7) assembly also includes a support base (7) with an installation port. The radial adjustment assembly includes a wedge (8) disposed at the bottom of the installation port and a radial adjustment member (9) disposed on the wedge (8). The radial adjustment member (9) has a shaft hole in the middle. The rotating shaft (10) is disposed in the shaft hole. The radial adjustment member (9) has a first inclined adjustment surface disposed opposite to the shaft hole wall. The first inclined adjustment surface is wedge-fitted with the second inclined adjustment surface on the wedge (8) for adjusting the radial position of the rotating shaft (10).

7. The combined self-aligning roller bearing according to claim 6, characterized in that... The self-aligning roller bearing main component includes a roller support frame mounted on the rotating shaft (10), two rows of self-aligning rollers (11) mounted on the roller support frame, and spacers (12) mounted on both sides of the roller support frame. The inner end of the spacer (12) engages with the side wall of the roller support frame, and the outer end of the spacer (12) engages with the inner wall of the radial adjustment member (9).

8. The combined self-aligning roller bearing according to claim 7, characterized in that... An adjustment pad is provided between the outer jacket (13) and the inner ring (1), and the thickness of the adjustment pad is at least 2 mm.

9. The combined self-aligning roller bearing according to claim 8, characterized in that... The outer end of the rotating shaft (10) is provided with a sealing plate (14), and the outer wall of the radial adjustment member (9) is provided with a recess that matches the size of the sealing plate (14). The sealing plate (14) is embedded in the recess. The sealing plate (14) is fixed on the radial adjustment member (9) by connection. The radial dimension of the radial adjustment member (9) is smaller than the radial dimension of the self-aligning roller bearing main component.

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