Sectional type axial retainer and bearing

Abstract

The utility model discloses a sectional type axial retainer and a bearing, and relates to the technical field of bearings. Comprising an inner arc section and an outer arc section which is arranged on the outer side of the inner arc section and forms a fan-shaped structure with the inner arc section; a plurality of space rings distributed at intervals in the circumferential direction are arranged between the inner arc section and the outer arc section. Pockets used for installing rolling bodies are formed in the space rings, and oil passing holes communicated with the pockets are formed in the outer arc sections. An inner arc section and an outer arc section are arranged to form a fan-shaped structure, and the inner arc section is provided with an inner arc surface which forms a retainer section in the circumferential direction; due to the fact that the oil passing holes leading to the interiors of the pockets are formed in the outer arc sections, lubricating oil can directly enter the inner walls of the pockets through the oil passing holes and diffuse to the bottom faces of the inner walls of the pockets under the action of gravity, uniform lubrication between the inner walls of the pockets and rolling bodies is achieved, the lubricating effect is enhanced, and the service life of the retainer sections is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and in particular relates to a segmented axial retainer and a bearing. Background Art

[0002] The bearings used in the wind power field have a special structure compared to other existing bearings. Large-diameter rolling bearings are usually used. In order to have strong load-bearing capacity in both axial and radial directions, the large-diameter rolling bearings used include two concentric inner and outer rings and two rows of axial rollers and one row of radial rollers. For large-diameter rolling bearings, a cage structure composed of multiple continuous cage segments forming a ring along the circumferential direction is used to load the rollers. This not only increases the number of rollers assembled and increases the load-bearing capacity, but also facilitates assembly and disassembly.

[0003] However, the existing cage segments input lubricating oil through the oil filling hole of the inner ring of the bearing, first pass through the top surface of the cage segment, and further flow to the inner wall surface of the pocket hole under the action of high-speed rotation. However, since most of the lubricating oil first enters the bottom surface through the top surface of the cage segment, and the lubricating oil is thrown to the two ends of the cage segment along the circumferential direction under the action of rotation during high-speed rotation, the lubricating oil flowing into the bottom surface of the cage segment, especially the bottom surface of the pocket hole, is relatively insufficient, and it is impossible to ensure that more lubricating oil is pushed between the rolling element and the inner wall of the pocket hole for sufficient lubrication during high-speed operation. Utility Model Content

[0004] The utility model provides a segmented axial cage and bearing to solve the problem that during high-speed rotation, the lubricating oil is thrown more to the two ends of the cage segment along the circumferential direction under the rotation force, so the lubricating oil flowing into the bottom surface of the cage segment, especially the bottom surface of the pocket hole, is relatively insufficient.

[0005] The technical solution adopted by the utility model is:

[0006] A segmented axial retainer comprises an inner arc segment and an outer arc segment which is arranged outside the inner arc segment and forms a fan-shaped structure with the inner arc segment; a plurality of spacers which are spaced apart along the circumferential direction are arranged between the inner arc segment and the outer arc segment; the interior of the spacer has a pocket for mounting a rolling body, and the outer arc segment has an oil hole which is connected to the pocket.

[0007] A segmented axial retainer of the utility model also has the following additional technical features:

[0008] A first oil passage groove flowing through the oil passage hole is provided on the outer arc surface of the outer arc segment along the circumferential direction of the retaining frame segment, and the lubricating oil flows into the inner wall of the pocket hole through the first oil passage groove and the oil passage hole.

[0009] A second oil passage groove for passing through the oil passage hole is arranged on the outer arc surface of the outer arc segment along the axial direction of the retaining frame segment, and the second oil passage groove intersects with the first oil passage groove.

[0010] A first guiding inclined surface is formed between the outer arc segment and the end surfaces of the spacer ring on both sides along the axial direction of the retaining frame segment.

[0011] A second guiding inclined surface is formed between the inner arc segment and the end surfaces of the spacer ring on both sides along the axial direction of the retaining frame segment.

[0012] A window beam is connected between two adjacent spacers, and the window beam can separate the spacers along the circumferential direction of the retaining frame segment.

[0013] One end of the pocket along the axial direction of the cage segment has a profile opening for mounting the rolling body, and the other end of the pocket along the axial direction of the cage segment has an arc-shaped opening for retaining the rolling body.

[0014] The profile openings and the arc-shaped openings between adjacent pockets are distributed alternately along the same side of the circumferential direction of the retaining frame segment.

[0015] A limiting section capable of radially limiting the rolling body is formed between the arc-shaped opening and the profile-shaped opening.

[0016] The present application also relates to a bearing, comprising an annular axis retainer, an inner ring, an outer ring and a rolling body formed by the above-mentioned segmented axial retainer; the axial retainer is arranged between the inner ring and the outer ring, the rolling body is connected to the groove of the axial retainer, and the inner ring and the outer ring are rotatably connected through the rolling body.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] 1. A segmented axial retainer, comprising an inner arc segment and an outer arc segment arranged outside the inner arc segment to form a fan-shaped structure with the inner arc segment; a plurality of spacers spaced and distributed along the circumferential direction are arranged between the inner arc segment and the outer arc segment; the spacers have pockets for mounting rolling bodies inside, and the outer arc segment has oil holes communicating with the pockets. By arranging the inner arc segment and the outer arc segment to form a fan-shaped structure, the inner arc segment has an inner arc surface along the circumferential direction that forms a segmented retainer. The outer arc segment has an outer arc surface that forms a retaining frame segment, and the main body of the retaining frame segment is formed by the inner arc segment and the outer arc segment, which plays a role in providing stable support for the rolling body; a plurality of spacers with pockets are arranged at intervals along the circumferential direction of the inner arc segment and the outer arc segment, so that the rolling body has a precise installation position, and the spacers further enhance the supporting strength of the pockets, which can improve the holding strength of the pockets on the rolling body; by providing the outer arc segment with oil holes leading to the inside of the pockets, the speed of the lubricating oil flowing from the outside to the inside of the retaining frame segment is further enhanced, and the lubricating oil can directly enter the inner wall of the pocket through the oil holes and diffuse to the bottom surface of the inner wall of the pocket under the action of gravity, and diffuse on the surface of the rolling body rotating at a high speed, so as to achieve uniform lubrication between the inner wall of the pocket and the rolling body, thereby enhancing the lubrication effect, avoiding the majority of the lubricating oil from the upper surface of the pocket into the inner wall of the pocket, resulting in insufficient lubrication of the bottom surface of the inner wall of the pocket and insufficient lubrication of the rotating surface of the rolling body facing the bottom of the pocket, thereby improving the lubrication efficiency and extending the service life of the retaining frame segment.

[0019] 2. As a preferred embodiment, a first oil-passing groove that flows through the oil-passing hole is provided on the outer arc surface of the outer arc segment along the circumferential direction of the retainer segment, and the lubricating oil flows into the inner wall of the pocket hole through the first oil-passing groove and the oil-passing hole. By providing the first oil-passing groove that flows through the oil-passing hole, the lubricating oil can flow through the first oil-passing groove and directly enter the interior of the pocket hole through the oil-passing hole, further increasing the flow area of ​​the lubricating oil between the retainer and the rolling element, avoiding the lubricating oil being thrown to both sides of the bearing in the radial direction due to the edge of the lubricating oil retainer under the action of centrifugal force during high-speed rotation, so that the lubricating oil can be pushed more to the surface of the rolling element, thereby achieving more sufficient lubrication between the rolling element and the retainer, thereby enhancing the lubrication effect, reducing the wear caused by the sliding friction between the rolling element and the retainer, and being able to fully take away the heat between the retainer and the rolling element, thereby increasing the service life of the bearing.

[0020] 3. As a preferred embodiment, a second oil groove flowing through the oil hole is provided on the outer arc surface of the outer arc segment along the axial direction of the retaining frame segment, and the second oil groove intersects with the first oil groove. By providing the second oil groove flowing through the oil hole, the lubricating oil can flow through the second oil groove and directly enter the interior of the pocket through the oil hole, further increasing the flow area of ​​the lubricating oil between the retaining frame and the rolling element, so that the lubricating oil can be pushed to the surface of the rolling element more, thereby achieving more sufficient lubrication between the rolling element and the retaining frame; and can fully take away the heat between the retaining frame and the rolling element, thereby enhancing the lubrication effect and improving the service life of the bearing; and the first oil groove and the second oil groove intersect, so that the lubricating oil flowing in more directions can be collected and flowed through the first oil groove and the second oil groove into the oil hole and finally flow into the interior of the pocket, achieving sufficient and uniform lubrication between the inner wall of the pocket and the rolling element.

[0021] 4. As a preferred embodiment, a first guiding slope is formed between the outer arc segment and the two side end faces of the spacer along the axial direction of the cage segment. The provision of the first guiding slope can not only reduce the weight of the entire cage segment, but also further increase the area of ​​lubricating oil circulation, and can accelerate the lubricating speed of the lubricating oil when the lubricating oil enters the inner wall of the pocket hole from the outer arc segment under the inclination of the first guiding slope, thereby further improving the lubricating effect.

[0022] 5. As a preferred embodiment, one end of the pocket along the axial direction of the cage segment has a profile opening for mounting the rolling body, and the other end of the pocket along the axial direction of the cage segment has an arc opening for holding the rolling body. The opening size of the profile opening is larger than the opening size of the arc opening, so that the rolling body can enter the pocket through the profile opening and extend into the arc opening on the other side of the pocket, and the rolling body can be held in the arc opening for rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0024] Figure 1 It is a side view structural diagram of a segmented axial retainer at a first angle in one embodiment of the utility model;

[0025] Figure 2 It is a side view structural diagram of a segmented axial retainer at a second angle according to an embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional schematic diagram of a segmented axial retainer in one embodiment of the utility model;

[0027] In the figure,

[0028] 1 inner arc segment, 2 outer arc segment, 3 spacer ring, 4 pocket hole, 5 first oil passing groove, 6 second oil passing groove, 7 first guide inclined surface, 8 second guide inclined surface, 9 arc-shaped opening, 10 profile opening, 11 limiting segment, 12 oil passing hole, 13 arc-shaped guide surface, 14 plane guide surface. DETAILED DESCRIPTION

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0030] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0033] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0034] The utility model relates to a segmented axial retainer, such as Figure 1-3 As shown, it includes an inner arc segment 1 and an outer arc segment 2 which is arranged on the outside of the inner arc segment 1 and forms a fan-shaped structure with the inner arc segment 1; a plurality of spacers 3 are arranged between the inner arc segment 1 and the outer arc segment 2 and are distributed at intervals along the circumferential direction; the interior of the spacer 3 has a pocket 4 for mounting a rolling body, and the outer arc segment 2 is provided with an oil hole 12 which is connected to the pocket 4.

[0035] The outer arc segment 2 has an outer arc surface that forms a cage segment, and the inner arc segment 1 and the outer arc segment 2 form the main body of the cage segment, which plays a role in providing stable support for the rolling element; a plurality of spacers 3 with pockets 4 are arranged at intervals along the circumferential direction of the inner arc segment 1 and the outer arc segment 2, so that the rolling element has a precise installation position, and the spacers 3 further enhance the support strength of the pockets 4, which can improve the holding strength of the pockets 4 on the rolling element; by providing the outer arc segment 2 with an oil hole 12 leading to the inside of the pocket 4, the lubricating oil passing through the cage is further enhanced. The speed of the segment flowing from the outside to the inside is such that the lubricating oil can directly enter the inner wall of the pocket 4 through the oil hole 12 and diffuse to the bottom surface of the inner wall of the pocket 4 under the action of gravity, and diffuse on the surface of the high-speed rotating rolling body, thereby achieving uniform lubrication between the inner wall of the pocket 4 and the rolling body, thereby enhancing the lubrication effect and avoiding the phenomenon that most of the lubricating oil flows from the upper surface of the pocket 4 into the inner wall of the pocket 4, resulting in insufficient lubrication of the bottom surface of the inner wall of the pocket 4 and insufficient lubrication of the rotating surface of the rolling body toward the bottom of the pocket 4, thereby improving the lubrication efficiency and extending the service life of the retaining frame segment.

[0036] As a preferred embodiment, Figure 2 As shown, a first oil groove 5 flowing through the oil hole 12 is provided on the outer arc surface of the outer arc segment 2 along the circumferential direction of the retaining frame segment, and the lubricating oil flows into the inner wall of the pocket 4 through the first oil groove 5 and the oil hole 12.

[0037] By providing the first oil groove 5 that flows through the oil hole 12, the lubricating oil can flow through the first oil groove 5 and pass through the oil hole 12 directly into the interior of the pocket 4, further increasing the flow area of ​​the lubricating oil between the retaining frame and the rolling element, avoiding the lubricating oil being thrown to both sides of the bearing in the radial direction by the edge of the lubricating oil retaining frame under the action of centrifugal force during high-speed rotation, so that the lubricating oil can be pushed more to the surface of the rolling element, thereby achieving more complete lubrication between the rolling element and the retaining frame, thereby enhancing the lubrication effect, reducing the wear caused by the sliding friction between the rolling element and the retaining frame, and being able to fully take away the heat between the retaining frame and the rolling element, thereby increasing the service life of the bearing.

[0038] As a preferred embodiment, Figure 2 As shown, a second oil passage groove 6 flowing through the oil passage hole 12 is provided on the outer arc surface of the outer arc segment 2 along the axial direction of the retaining frame segment, and the second oil passage groove 6 intersects with the first oil passage groove 5 .

[0039] By providing a second oil passage groove 6 that flows through the oil passage hole 12, the lubricating oil can flow through the second oil passage groove 6 and directly enter the interior of the pocket 4 through the oil passage hole 12, further increasing the flow area of ​​the lubricating oil between the retaining frame and the rolling element, so that the lubricating oil can be pushed more toward the surface of the rolling element, thereby achieving more complete lubrication between the rolling element and the retaining frame; and can fully take away the heat between the retaining frame and the rolling element, thereby enhancing the lubrication effect and increasing the service life of the bearing; and the first oil passage groove 5 and the second oil passage groove 6 intersect, which can achieve the collection and flow of lubricating oil flowing in more directions through the first oil passage groove 5 and the second oil passage groove 6 into the oil passage hole 12 and finally flow into the interior of the pocket 4, achieving sufficient and uniform lubrication between the inner wall of the pocket 4 and the rolling element.

[0040] Preferably, Figure 2 As shown, the first oil groove 5 and the second oil groove 6 are orthogonal and cross-connected to the oil hole 12 in a cross-shaped structure, so that the lubricating oil in the first oil groove 5 and the second oil groove 6 can flow directly into the pocket 4 through the oil hole 12 when flowing through the oil hole 12.

[0041] As a preferred embodiment, Figure 2 As shown, a first guiding inclined surface 7 is formed between the outer arc segment 2 and the end surfaces of the spacer ring 3 on both sides along the axial direction of the retaining frame segment.

[0042] Furthermore, if Figure 1 As shown, a second guiding inclined surface 8 is formed between the inner arc segment 1 and the end surfaces of the spacer ring 3 on both sides along the axial direction of the retaining frame segment.

[0043] The arrangement of the first guide bevel 7 and the second guide bevel 8 can not only reduce the weight of the entire retaining frame segment, but also further increase the area for the lubricating oil to flow. When the lubricating oil enters the inner wall of the pocket 4 from the outer arc segment 2, it can flow into the interior of the pocket 4 at the inclination of the first guide bevel 7 and the second guide bevel 8, thereby accelerating the lubrication speed of the lubricating oil and further improving the lubrication effect.

[0044] As a preferred embodiment, Figure 1 As shown, a window beam is connected between two adjacent spacers 3, and the window beam can separate the spacers 3 along the circumferential direction of the retaining frame segment. The setting of the window beam further enhances the connection strength between the spacers 3 and the pockets 4 inside the spacers 3, and effectively spaces the pockets 4, which can ensure the precise installation position of the rolling body. The window beam between the pockets 4 can be connected with the spacers 3 to form a planar structure along the circumferential direction of the retaining frame segment, which can realize the smooth flow of lubricating oil between the window beam and the spacers 3, and smoothly enter the pockets 4 inside the spacers 3 to fully lubricate the rolling body.

[0045] As a preferred embodiment, one end of the pocket 4 along the axial direction of the retaining frame segment has a profile opening 10 for mounting the rolling body, and the other end of the pocket 4 along the axial direction of the retaining frame segment has an arcuate opening 9 for retaining the rolling body.

[0046] The profile opening 10 refers to an opening with a predetermined shape, which can be a structure with a rectangular cross section or a trapezoidal opening, which is determined according to actual production needs, and the purpose is to ensure that the rolling body can smoothly enter the arc opening 9 on the other side of the pocket 4 through the profile opening 10. Therefore, the two sides of the profile opening 10 along the circumferential direction of the retainer segment are used to guide the rolling body into the arc guide surface. The arc opening 9 is a trumpet-shaped structure projected along the axial direction of the retainer segment. The two sides of the arc opening 9 along the circumferential direction of the retainer segment have arc guide surfaces 13 for retaining the rolling body. The arc guide surface 13 is a circular arc surface structure. The spacing between the inner walls of the arc guide surfaces 13 on both sides gradually decreases from one side of the profile opening 10 to the outside of the arc opening along the axial direction of the retainer segment, and the purpose is to prevent the rolling body wrapped in the arc opening 9 from escaping from the arc opening 9 to the outside along the axial direction of the retainer segment. When in use, the rolling body is extended between the planar guide surfaces 14 of the profile opening 10 on one side of the pocket 4 and inserted between the arcuate guide surfaces 13 of the arcuate opening 9. The rolling body can rotate between the arcuate guide surfaces 13 and be retained in the installation space formed by the arcuate guide surfaces 13.

[0047] As a preferred embodiment, the profile openings 10 and the arcuate openings 9 between adjacent pockets 4 are alternately distributed along the same side of the circumferential direction of the cage segment.

[0048] like Figure 1 and Figure 2 As shown, on the same side along the circumferential direction of the retainer segment, between two adjacent pockets 4, the first pocket 4 has an arc-shaped opening 9 facing outward, and the second pocket 4 has a profile opening 10 facing outward, then on the other side along the circumferential direction of the retainer segment, the first pocket 4 has a profile opening 10 facing outward on this side, and the second pocket 4 has an arc-shaped opening 9 facing outward on this side, so that the rolling bodies in the multiple pockets 4 along the circumferential direction of the retainer segment are alternately arranged between the top and the bottom ends in the axial direction of the retainer segment, thereby achieving uniform load-bearing capacity, being able to averagely bear external complex loads in the retainer segment, and further improving the overall structural strength of the retainer segment.

[0049] As a preferred embodiment, a limiting section 11 capable of radially limiting the rolling body is formed between the arc-shaped opening 9 and the profile-shaped opening 10 .

[0050] In order to prevent the rolling body retained in the arc-shaped opening 9 from escaping from the pocket 4, a limiting section 11 is provided at the joint of the arc-shaped opening 9 and the profile opening 10, protruding from the inner wall of the profile opening 10 to a predetermined height and extending along the radial direction of the retaining frame segment. The rolling body is limited in the radial direction by the limiting section 11 to prevent the rolling body from moving from one side of the arc-shaped opening 9 to the side of the profile opening 10 and escaping from the pocket 4.

[0051] The present application also relates to a bearing, comprising an annular axis retainer, an inner ring, an outer ring and a rolling body formed by the above-mentioned segmented axial retainer; the axial retainer is arranged between the inner ring and the outer ring, the rolling body is connected to the groove of the axial retainer, and the inner ring and the outer ring are rotatably connected through the rolling body.

[0052] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0053] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0054] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A segmented axial cage, characterized in that: It includes an inner arc segment and an outer arc segment which is arranged outside the inner arc segment and forms a fan-shaped structure with the inner arc segment; a plurality of spacers which are spaced apart along the circumferential direction are arranged between the inner arc segment and the outer arc segment; the interior of the spacer has a pocket for mounting a rolling body, and the outer arc segment has an oil hole which is connected to the pocket.

2. A segmented axial retainer according to claim 1, characterized in that: A first oil passage groove flowing through the oil passage hole is provided on the outer arc surface of the outer arc segment along the circumferential direction of the retaining frame segment, and the lubricating oil flows into the inner wall of the pocket hole through the first oil passage groove and the oil passage hole.

3. A segmented axial retainer according to claim 2, characterized in that: A second oil passage groove for passing through the oil passage hole is arranged on the outer arc surface of the outer arc segment along the axial direction of the retaining frame segment, and the second oil passage groove intersects with the first oil passage groove.

4. A segmented axial retainer according to claim 1, characterized in that: A first guiding inclined surface is formed between the outer arc segment and the end surfaces of the spacer ring on both sides along the axial direction of the retaining frame segment.

5. The segmented axial retainer according to claim 1, characterized in that: A second guiding inclined surface is formed between the inner arc segment and the end surfaces of the spacer ring on both sides along the axial direction of the retaining frame segment.

6. A segmented axial retainer according to claim 1, characterized in that: A window beam is connected between two adjacent spacers, and the window beam can separate the spacers along the circumferential direction of the retaining frame segment.

7. The segmented axial retainer according to claim 1, characterized in that: One end of the pocket along the axial direction of the cage segment has a profile opening for mounting the rolling body, and the other end of the pocket along the axial direction of the cage segment has an arc-shaped opening for retaining the rolling body.

8. A segmented axial retainer according to claim 7, characterized in that: The profile openings and the arc-shaped openings between adjacent pockets are distributed alternately along the same side of the circumferential direction of the retaining frame segment.

9. A segmented axial retainer according to claim 8, characterized in that: A limiting section capable of radially limiting the rolling body is formed between the arc-shaped opening and the profile-shaped opening.

10. A bearing, characterized in that: It comprises an annular axis retainer, an inner ring, an outer ring and a rolling body formed by a segmented axial retainer as described in any one of claims 1 to 9; the axial retainer is arranged between the inner ring and the outer ring, the rolling body is connected to the pocket groove of the axial retainer, and the inner ring and the outer ring are rotationally connected through the rolling body.

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