Spherical roller bearing
By improving the axial circumferential runout, perpendicularity, and radial clearance of the inner and outer rings of the spherical roller bearing, designing a flat roller end face, and eliminating the guide ring, the problem of uneven thickness in copper foil manufacturing was solved, thereby improving bearing precision and lifespan and reducing costs.
Patent Information
- Application Number
- CN202410598015.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-11-14
AI Technical Summary
In the manufacturing process of copper foil, especially in the manufacturing process of 3-6μm thin copper foil, the problem of thickness non-uniformity is serious and existing technologies cannot effectively solve it.
By improving the axial circumferential runout and perpendicularity of the inner and outer rings of the spherical roller bearing, as well as the radial clearance between the roller and the outer ring, a flat roller end face is designed, the guide ring is eliminated, and the bearing's running accuracy is optimized to improve the radial runout of the cathode roller.
It significantly improves the uniformity of copper foil thickness, enhances bearing operating accuracy and service life, and reduces manufacturing costs.
Smart Images
Figure CN120946685A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a spherical roller bearing. Background Technology
[0002] Various types of bearings are used in a wide range of equipment and systems. For example, spherical roller bearings are commonly used in equipment used to manufacture copper foil. Figure 1 As shown, the device typically includes an electrolytic cell 2 powered by a power source 1, with a copper plate 3 placed in the electrolytic cell 2 as the anode of the electrolytic reaction, and a cathode roller 4 placed above the copper plate 3 as the cathode of the electrolytic reaction, with a certain gap 5 between them. Furthermore, by supplying power to the electrolyte in the electrolytic cell, copper ions are deposited on the surface of the cathode roller 4. As the cathode roller 4 rotates, in conjunction with other stripping rollers, the copper foil 6 is peeled off from the cathode roller 4 and collected.
[0003] Uneven copper foil thickness is a common problem during copper foil manufacturing. This is especially true when manufacturing thin copper foil of 3-6 μm, where uneven thickness poses a serious quality issue.
[0004] Therefore, there is a need in the art for an improved technical solution that can solve the problem of uneven thickness of copper foil, especially thin copper foil of 3-6μm. Summary of the Invention
[0005] In response to the problems and needs mentioned above, this disclosure proposes a novel technical solution that solves the aforementioned problems and brings about other technical effects by adopting the following technical features.
[0006] This invention provides a spherical roller bearing, comprising an inner ring, an outer ring, and rollers disposed between the inner and outer rings, wherein the spherical roller bearing satisfies at least one of the following conditions:
[0007] a) In the circumferential direction, the first axial end face of the inner ring undergoes a first axial circumferential runout t relative to the axis defined by the inner circumferential surface of the inner ring. Sd1 It is 2.647 × 10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm;
[0008] b) In the circumferential direction, the first selected position of the inner ring on the inner circumferential surface at the first axial end of the inner ring has a first perpendicularity t to the second axial end face of the inner ring. Sdr1 It is 4.412×10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm;
[0009] c) In the circumferential direction, the first selected position of the outer ring on the outer circumferential surface at the first axial end of the outer ring has a first perpendicularity t relative to the second axial end face of the outer ring. SD1 1.25×10-5 ×D±2μm, where D is the nominal outer diameter of the outer ring and the unit is mm;
[0010] d) The radial clearance C between the roller and the inner surface of the outer ring is:
[0011] 5.588×10 -4 ×d≤C≤7.941×10 -4 ×d, where d is the nominal inner diameter of the inner ring in mm.
[0012] Furthermore, the spherical roller bearing also satisfies at least one of the following conditions:
[0013] e) In the circumferential direction, the second axial end face of the inner ring undergoes a second axial circumferential runout t relative to the axis defined by the inner circumferential surface of the inner ring. Sd2 It is 2.647 × 10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm;
[0014] f) In the circumferential direction, the second selected position of the inner ring on the inner circumferential surface at the second axial end of the inner ring has a second perpendicularity t relative to the first axial end face of the inner ring. Sdr2 It is 4.412×10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm;
[0015] g) In the circumferential direction, the second selected position of the outer ring on the outer circumferential surface at the second axial end of the outer ring has a second perpendicularity t relative to the first axial end face of the outer ring. SD2 1.25×10 -5 ×D±2μm, where D is the nominal outer diameter of the outer ring in mm.
[0016] According to the present invention, the above-mentioned improvements are made for any one or any combination of the first and second axial circumferential runout of the inner ring, the first and second perpendicularity of the inner ring, and the first and second perpendicularity of the outer ring, thereby achieving a significant improvement in the bearing running accuracy, and further improving the radial runout of the cathode roller and the thickness uniformity of the copper foil (especially 3-6 μm thin copper foil). Attached Figure Description
[0017] Figure 1 A schematic diagram of copper foil manufacturing equipment;
[0018] Figure 2 This is a schematic diagram of a spherical roller bearing;
[0019] Figure 3 This is a schematic diagram of the first preferred embodiment of the present invention;
[0020] Figure 4This is a schematic diagram of the second preferred embodiment of the present invention;
[0021] Figure 5 This is a schematic diagram of the third preferred embodiment of the present invention;
[0022] Figure 6a and Figure 6b This is a schematic diagram showing the contact between the roller and the guide ring when the guide ring is included.
[0023] Figure 7 This is a schematic diagram of a roller according to a preferred embodiment of the present invention. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0025] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of this disclosure may have fewer components, other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Where the number of components is not specified, the number of components may be one or more; similarly, the terms “a,” “the,” “described,” and similar terms do not necessarily indicate a quantity limitation. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “install,” “set,” “connect,” or “link,” and similar terms are not limited to physical or mechanical installation, setting, or connection, but may include electrical installation, setting, or connection, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate the relative positional relationship of the equipment during use or the positional relationship shown in the accompanying drawings; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0027] For ease of explanation, the direction of the bearing's axis of rotation is referred to as the axial direction in this document, and the direction perpendicular to this axial direction is referred to as the radial direction. The term "inner / inward" refers to the direction toward the inside of the bearing, while the term "outer / outward" refers to the direction toward the outside of the bearing.
[0028] As mentioned earlier, uneven thickness is a common problem in copper foil manufacturing, especially when manufacturing very thin copper foil (e.g., 3-6 μm). However, the causes of this problem are complex and varied, including poor electrolysis processes, inaccurate cathode roller precision and dimensions, and poor cathode roller operating conditions.
[0029] See you again Figure 1 According to the inventors' research, a significant factor affecting copper foil thickness is the gap 5 between the cathode roller 4 and the copper plate 3. If this gap 5 undergoes uncontrollable changes 7 during copper foil manufacturing, it will significantly affect the thickness of the copper foil 6. Furthermore, the gap change 7 is related to the radial runout 8 of the cathode roller 4. Therefore, improving the radial runout 8 of the cathode roller can effectively improve the thickness uniformity of copper foil, especially thin copper foil of 3-6 μm.
[0030] The inventors' research revealed that the radial runout 8 of the cathode roller 4 is also related to multiple factors. The cathode roller 4 is typically mounted on a shaft 9, which is supported by a spherical roller bearing 10. Therefore, improving the running accuracy of the bearing 10 can improve the radial runout of the cathode roller 4. Bearing running accuracy can be improved in several ways, such as by improving the bearing's installation accuracy and improving bearing lubrication conditions.
[0031] In addition to the above-mentioned improvements, this invention proposes to improve the uniformity of copper foil thickness by improving the axial circumferential runout / perpendicularity of the inner / outer ring of the bearing used to support the cathode roller shaft, and / or improving the radial clearance between the roller and the outer ring, thereby reducing or even avoiding the radial runout of the cathode roller.
[0032] This invention can be used in various types of spherical roller bearings, such as spherical roller bearings with a tapered inner circumferential surface on the inner ring.
[0033] Figure 2 A schematic diagram of a spherical roller bearing according to the present invention is shown, which includes an inner ring 11, an outer ring 12, and rollers 13 disposed between the inner ring 11 and the outer ring 12. The spherical roller bearing, for example, includes two rows of rollers 13.
[0034] See Figure 3 According to a first preferred embodiment of the present invention, the present invention proposes an improvement to address the axial circumferential runout of the axial end face of the inner ring of a spherical roller bearing. By specifically designing the axial circumferential runout of the inner ring axial end face, the bearing's running accuracy can be significantly improved, thereby improving the radial runout of the cathode roller and the uniformity of copper foil thickness. Such a targeted improvement is not present in the prior art; the inner rings of existing spherical roller bearings only meet conventional technical standards (e.g., ISO standards), which do not specify design requirements for the axial circumferential runout of the inner ring axial end face.
[0035] Specifically, see Figure 3 In the circumferential direction, the first axial end face 111 of the inner ring 11 has a first axial circumferential runout t relative to the axis defined by the inner circumferential surface 110 of the inner ring (also referred to as the inner circumferential surface K of the inner ring). Sd1 It is 2.647 × 10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring in mm. Therefore, for example, for a spherical roller bearing with a nominal inner diameter d of 340mm, the first axial circumferential runout t... Sd1 The size is 7-11 μm, more preferably 9 μm.
[0036] More preferably, in the circumferential direction, the second axial end face 112 of the inner ring 11 has a second axial circumferential runout t relative to the axis defined by the inner circumferential surface 110 of the inner ring. Sd2 It is 2.647 × 10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring in mm. Therefore, for example, for a spherical roller bearing with a nominal inner diameter d of 340mm, the second axial circumferential runout t... Sd2 The size is 7-11 μm, more preferably 9 μm.
[0037] The aforementioned axial circumferential runout can be measured in the following way: the inner ring 11 is set on a rotating shaft, and while the inner ring 11 is rotated in the circumferential direction by the rotating shaft, the measurement is performed at any position on the first axial end face 111 / second axial end face 112 by an instrument. If the measured position of the corresponding axial end face in the circumferential direction is not completely perpendicular to the axis, the instrument will show a changing reading, which reflects the axial circumferential runout of the corresponding axial end face.
[0038] It should be understood that the above-mentioned improvements to one or both of the first and second axial circumferential runouts of the inner ring can improve the bearing's operating accuracy. Furthermore, when both are optimized in the above-mentioned way, the bearing's operating accuracy will be improved even more, and the copper foil thickness uniformity will be improved as a result.
[0039] See Figure 4 According to a second preferred embodiment of the present invention, the present invention proposes to improve the perpendicularity of the axial end face of the inner ring of a spherical roller bearing. By specifically designing the perpendicularity of the axial end face of the inner ring, the running accuracy of the bearing can be significantly improved, thereby improving the radial runout of the cathode roller and the uniformity of the copper foil thickness. Such targeted improvement is not present in the prior art; the inner rings of existing spherical roller bearings only meet conventional technical standards (e.g., ISO standards), which do not specify design requirements for the perpendicularity of the axial end face of the inner ring.
[0040] Specifically, in the circumferential direction, the first selected position A of the inner ring on the inner circumferential surface 110 at the first axial end of the inner ring 11 has a first perpendicularity t relative to the second axial end face 112 (reference plane D) of the inner ring 11. Sdr1 It is 4.412×10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring in mm. Therefore, for example, for a spherical roller bearing with a nominal inner diameter d of 340mm, the first perpendicularity t of the inner ring... Sdr1 The size is 13-17 μm, more preferably 15 μm.
[0041] The first verticality t of the aforementioned inner ring Sdr1 The measurement can be performed as follows: Place the second axial end face 112 of the inner ring 11 on a plane, i.e., use the second axial end face 112 as the reference plane D; rotate the inner ring 11 in the circumferential direction, and simultaneously measure at a selected position A using an instrument. If there is a situation where the inner ring is not completely perpendicular to the reference plane D at the selected position A in the circumferential direction, the instrument will display a changing reading, which reflects the first perpendicularity t of the inner ring. Sdr1 .
[0042] Preferably, the first selected position A of the inner ring is any position on the inner circumferential surface 110, ranging from the first axial end face 111 of the inner ring 11 to a distance of 0.05-0.15w (preferably 0.1w) from the first axial end face, where w is the axial width of the inner ring. According to the inventors' research, designing the perpendicularity at a position within the above-mentioned range can better improve the bearing's operating accuracy compared to designing perpendicularity at other positions.
[0043] More preferably, in the circumferential direction, the second selected position B of the inner ring on the inner circumferential surface 110 at the second axial end of the inner ring 11 has a second perpendicularity t to the first axial end face 111 (reference plane E) of the inner ring 11. Sdr2 It is 4.412×10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring in mm. Therefore, for example, for a spherical roller bearing with a nominal inner diameter d of 340mm, the second perpendicularity t of the inner ring... Sdr2 The size is 13-17 μm, more preferably 15 μm.
[0044] The second verticality t of the aforementioned inner ring Sdr2 The measurement can be performed as follows: Place the first axial end face 111 of the inner ring 11 on a plane, i.e., use the first axial end face 111 as the reference plane E; rotate the inner ring 11 in the circumferential direction, and simultaneously measure at a selected position B using an instrument. If there is a situation where the inner ring is not completely perpendicular to the reference plane E at the selected position B in the circumferential direction, the instrument will display a changing reading, which reflects the second perpendicularity t of the inner ring. Sdr2 .
[0045] Preferably, the second selected position B of the inner ring is any position on the inner circumferential surface 110, ranging from the second axial end face 112 of the inner ring 11 to a distance of 0.05-0.15w (preferably 0.1w) from the second axial end face, where w is the axial width of the inner ring. According to the inventors' research, designing the perpendicularity at a position within the above-mentioned range can better improve the bearing's operating accuracy compared to designing the perpendicularity at other positions.
[0046] It should be understood that the above-mentioned improvements to one or both of the inner ring first perpendicularity and inner ring second perpendicularity can improve the bearing running accuracy. Moreover, when both are optimized in the above-mentioned way, the bearing running accuracy will be improved even more, and the thickness uniformity of the copper foil will be improved in turn.
[0047] See Figure 5According to a third preferred embodiment of the present invention, the present invention proposes to improve the perpendicularity of the axial end face of the outer ring of a spherical roller bearing. By specifically designing the perpendicularity of the axial end face of the outer ring, the running accuracy of the bearing can be significantly improved, thereby improving the radial runout of the cathode roller and the uniformity of copper foil thickness. Such targeted improvement is not present in the prior art; the outer ring of existing spherical roller bearings only meets conventional technical standards (e.g., ISO standards), which do not specify design requirements for the perpendicularity of the axial end face of the outer ring.
[0048] Specifically, in the circumferential direction, the first selected position A of the outer ring on the outer peripheral surface 120 at the first axial end of the outer ring 12 is perpendicular to the second axial end face 122 (reference plane D) of the outer ring 12 with respect to the outer ring 12's first perpendicularity t. SD1 1.25×10 -5 ×D±2μm, where D is the nominal outer diameter of the outer ring in mm.
[0049] The first perpendicularity t of the aforementioned outer ring SD1 The measurement can be performed as follows: Place the second axial end face 122 of the outer ring 12 on a plane, i.e., use the second axial end face 122 as the reference plane D; rotate the outer ring 12 in the circumferential direction, and simultaneously measure at a selected position A using an instrument. If there is a situation where the outer ring is not completely perpendicular to the reference plane D at the selected position A in the circumferential direction, the instrument will display a changing reading, which reflects the first perpendicularity t of the outer ring. Sdr1 .
[0050] Preferably, the first selected position A of the outer ring is any position on the outer peripheral surface 120, ranging from the first axial end face 121 of the outer ring 12 to a distance of 0.05-0.15W (preferably 0.1W) from the first axial end face, where W is the axial width of the outer ring. According to the inventors' research, designing the perpendicularity at a position within the above-mentioned range can better improve the bearing's operating accuracy compared to designing perpendicularity at other positions.
[0051] More preferably, in the circumferential direction, the second selected position B of the outer ring on the outer peripheral surface 120 at the second axial end of the outer ring 12 has a second perpendicularity t to the first axial end face 121 of the outer ring 12. SD2 1.25×10 -5 ×D±2μm, where D is the nominal outer diameter of the outer ring in mm.
[0052] The second verticality t of the outer ring mentioned above SD2The measurement can be performed as follows: Place the first axial end face 121 of the outer ring 12 on a plane, i.e., use the first axial end face 121 as the reference plane E; rotate the outer ring 12 in the circumferential direction, and simultaneously measure at a selected position B using an instrument. If there is a situation where the outer ring is not completely perpendicular to the reference plane E at the selected position B in the circumferential direction, the instrument will display a changing reading, which reflects the second perpendicularity t of the outer ring. Sdr2 .
[0053] Preferably, the second selected position B of the outer ring is any position on the outer peripheral surface 120, ranging from the second axial end face 122 of the outer ring 12 to a distance of 0.05-0.15W (preferably 0.1W) from the second axial end face, where W is the axial width of the outer ring. According to the inventors' research, designing the perpendicularity at a position within the above-mentioned range can better improve the bearing's operating accuracy compared to designing perpendicularity at other positions.
[0054] It should be understood that the above-mentioned improvements to one or both of the outer ring first perpendicularity and outer ring second perpendicularity can improve the bearing running accuracy. Moreover, when both are optimized in the above-mentioned way, the bearing running accuracy will be improved even better, and the copper foil thickness uniformity will be improved in turn.
[0055] See back Figure 2 According to a fourth preferred embodiment of the present invention, the radial clearance C between the roller 13 and the inner surface 123 of the outer ring is:
[0056] 5.588×10 -4 ×d≤C≤7.941×10 -4 ×d, where d is the nominal inner diameter of the inner ring in mm.
[0057] Thus, for example, for a spherical roller bearing with a nominal inner diameter d of 340 mm, the radial clearance C is 190–270 μm.
[0058] While existing technologies generally specify radial clearance for spherical roller bearings, the conventional radial clearance is typically greater than the aforementioned values. For example, in existing technologies, the radial clearance C for a spherical roller bearing with a nominal inner ring diameter d of 340 mm is usually 270–360 μm. Therefore, by improving the radial clearance C between the roller and the inner surface 120 of the outer ring, the bearing's running accuracy can be significantly improved, thereby reducing the radial runout of the cathode roller and improving the uniformity of copper foil thickness.
[0059] Furthermore, it should be understood that the first to fourth embodiments of the present invention can be combined in any way, that is, the above-mentioned improvements can be made for any one or any combination of the first and second axial circumferential runout of the inner ring, the first and second perpendicularity of the inner ring, and the first and second perpendicularity of the outer ring, thereby achieving a significant improvement in the bearing running accuracy, and further improving the radial runout of the cathode roller and the thickness uniformity of the copper foil (especially 3-6μm thin copper foil).
[0060] Furthermore, this invention also proposes an improved design for the roller. See [link / reference] Figure 2 as well as Figure 6a In conventional designs, between the opposing end faces of the two rows of rollers in a double-row spherical roller bearing, that is... Figure 2 A guide ring (not shown) is also present at the dashed box S. This guide ring helps guide the rollers into the correct position, thus facilitating the operation of the spherical roller bearing.
[0061] In this conventional design, such as Figure 6a As shown, roller 13 is typically designed with a spherical end face R, with a small bevel angle γ between the roller's own axis and the bearing's axis of rotation. This spherical end face R allows roller 13 to have minimal surface contact with the guide ring G. Nevertheless, some contact between roller 13 and guide ring G is unavoidable (e.g., at region M). This contact causes severe wear on both guide ring G and roller 13, reducing bearing life. Furthermore, roller 13 and guide ring G will wear away some material due to this contact. Especially when guide ring G is typically made of cast iron, this wear causes cast iron particles to fall from the guide ring and enter the gap between roller 13 and raceway, further damaging roller 13 and raceway. As a result, the geometry of roller 13 and raceway becomes unstable, leading to unexpected changes in the radial clearance C between roller 13 and outer ring 12. This results in a loss of operating accuracy in the spherical roller bearing, which in turn causes radial runout 8 of the cathode roller 4, severely affecting the uniformity of copper foil thickness.
[0062] Furthermore, machining a spherical end face R on roller 13 will increase the manufacturing cost of the roller. Ideally, the end face of roller 13 should be a flat surface. However, as... Figure 6b As shown, when the end face of roller 13 is a flat surface, it will make edge contact with guide ring G, which may even cause more severe wear.
[0063] Therefore, this invention proposes removing the guide ring G. For example... Figure 2As shown, at the dashed box S, the spherical roller bearing of the present invention does not include a guide ring. This not only solves the wear problem caused by edge contact between the roller and the guide ring, making the radial clearance C more stable, but also improves the radial runout of the cathode roller and the uniformity of the copper foil thickness. Simultaneously, the opposing end faces 130 of each roller 13 in the two rows of rollers 13 of the present invention are formed as flat surfaces, as shown... Figure 7 As shown, this further reduces the manufacturing cost of the rollers. In particular, this design of the invention allows the bearing to operate stably at lower speeds (e.g., 5-40 rpm, especially 10-30 rpm).
[0064] It should also be understood that the above-described design of the roller of the present invention can also be combined with any of the first to third preferred embodiments described above, thereby further improving the radial runout of the cathode roller and improving the uniformity of copper foil thickness.
[0065] The exemplary embodiments of this disclosure have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.
Claims
1. A spherical roller bearing comprising an inner ring (11), an outer ring (12), and rollers (13) disposed between the inner ring (11) and the outer ring (12), wherein the spherical roller bearing satisfies at least one of the following conditions: a) In the circumferential direction, the first axial end face (111) of the inner ring (11) has a first axial circumferential runout t relative to the axis defined by the inner circumferential surface (110) of the inner ring. Sd1 It is 2.647 × 10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm; b) In the circumferential direction, the first selected position of the inner ring on the inner circumferential surface (110) at the first axial end of the inner ring (11) has a first perpendicularity t to the second axial end face (112) of the inner ring (11). Sdr1 It is 4.412×10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm; c) In the circumferential direction, the first selected position of the outer ring on the outer peripheral surface (120) at the first axial end of the outer ring (12) has a first perpendicularity t to the second axial end face (122) of the outer ring (12). SD1 1.25×10 -5 ×D±2μm, where D is the nominal outer diameter of the outer ring and the unit is mm; d) The radial clearance C between the roller (13) and the inner surface (123) of the outer ring is: 5.588×10 -4 ×d≤C≤7.941×10 -4 ×d, where d is the nominal inner diameter of the inner ring in mm.
2. The spherical roller bearing as described in claim 1, wherein, The spherical roller bearing also satisfies at least one of the following conditions: e) In the circumferential direction, the second axial end face (112) of the inner ring (11) moves t relative to the axis defined by the inner circumferential surface (110) of the inner ring in a second axial circumferential runout. Sd2 It is 2.647 × 10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm; f) In the circumferential direction, the second selected position of the inner ring on the inner circumferential surface (110) at the second axial end of the inner ring (11) has a second perpendicularity t to the first axial end face (111) of the inner ring (11). Sdr2 It is 4.412×10 -5 ×d±2μm, where d is the nominal inner diameter of the inner ring and the unit is mm; g) In the circumferential direction, the second selected position of the outer ring on the outer peripheral surface (120) at the second axial end of the outer ring (12) has a second perpendicularity t to the first axial end face (121) of the outer ring (12). SD2 1.25×10 -5 ×D±2μm, where D is the nominal outer diameter of the outer ring in mm.
3. The spherical roller bearing as described in claim 1, wherein, In condition b), the first selected position of the inner ring is any position on the inner circumferential surface (110) from the first axial end face (111) of the inner ring (11) to a distance of 0.05-0.15w from the first axial end face (111), where w is the axial width of the inner ring.
4. The spherical roller bearing as described in claim 2, wherein, In condition f), the second selected position of the inner ring is any position on the inner circumferential surface (110) from the second axial end face (112) of the inner ring (11) to a distance of 0.05-0.15w from the second axial end face (112), where w is the axial width of the inner ring.
5. The spherical roller bearing as described in claim 1, wherein, In condition c), the first selected position of the outer ring is any position on the outer peripheral surface (120) from the first axial end face (121) of the outer ring (12) to a distance of 0.05-0.15W from the first axial end face (121), where W is the axial width of the outer ring.
6. The spherical roller bearing as described in claim 2, wherein, In condition g), the second selected position of the outer ring is any position on the outer peripheral surface (120) from the second axial end face (122) of the outer ring (12) to a distance of 0.05-0.15W from the second axial end face (122), where W is the axial width of the outer ring.
7. The spherical roller bearing as claimed in claim 1, wherein, The inner ring (11) has a conical inner circumferential surface.
8. The spherical roller bearing according to any one of claims 1-7, comprising two rows of rollers (13) disposed between an inner ring (11) and an outer ring (12), and wherein there is no guide ring between the two rows of rollers (13).
9. The spherical roller bearing as claimed in claim 8, wherein, The opposite end faces (130) of each of the two rows of rollers (13) are formed as flat surfaces.
10. The spherical roller bearing as claimed in claim 9, wherein, The spherical roller bearing operates at speeds of 5 to 40 rpm.