Split type wear-resistant bearing retainer and bearing
By designing a split-type wear-resistant bearing cage, and adopting a plastic wear-resistant layer and a lightweight rib structure, the problem of insufficient durability of wind turbine cages has been solved, thereby improving the durability and enhancing the operational stability of the cage.
Patent Information
- Application Number
- CN202423153944.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The cages in wind turbines are not very durable, resulting in high costs for transportation, installation, maintenance and replacement, and making it difficult to optimize them specifically.
A split-type wear-resistant bearing cage is designed, which is formed by at least two cage units, including a first arc segment, a second arc segment and a window beam, and is covered with a plastic wear-resistant layer. Combined with a lightweight design and rib structure, it enhances the limiting and lubrication effect on the rolling elements.
It improves cage durability, reduces wear, enhances rolling element stability and bearing operating speed, reduces transportation and assembly costs, and extends service life.
Smart Images
Figure CN223854673U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of retainer, especially relates to a split type wear -resisting bearing retainer and bearing. BACKGROUND
[0002] As an important component in the wind driven generator, the bearing needs to meet the requirements of large load and variable load during the operation of the wind driven generator. The retainer, as a component of the bearing, also needs to meet the above requirements.
[0003] Through failure analysis of the failed bearings in multiple wind driven generators, it is found that the position of the damaged retainer is not determined, and it is difficult to optimize the retainer. The cost of transportation, installation, maintenance and replacement of the bearings in the wind driven generator is extremely high, so the durability of the retainer needs to be improved comprehensively to solve the technical problem of poor durability of the current bearing retainer. UTILITY MODEL CONTENTS
[0004] The main purpose of the utility model is to provide a split type wear -resisting bearing retainer and bearing, which aims at solving the technical problem of poor durability of the current split type wear -resisting bearing retainer.
[0005] To achieve the above purpose, the split type wear -resisting bearing retainer provided by the utility model is formed by at least two retainer units, and the retainer unit comprises:
[0006] A first arc segment;
[0007] A second arc segment concentrically arranged with the first arc segment and spaced apart from the first arc segment by a predetermined distance;
[0008] A window beam, one end of the window beam is connected to the first arc segment, the other end is connected to the second arc segment, and a plurality of window beams are arranged at intervals, and two adjacent window beams form a pocket hole;
[0009] A plastic wear -resisting layer, the plastic wear -resisting layer is covered on the surface of the first arc segment, the second arc segment and the window beam.
[0010] Optionally, in an embodiment of the utility model, the window beam comprises:
[0011] A cross beam, one end of the cross beam is connected to the first arc segment, and the other end is connected to the second arc segment;
[0012] A rib plate, the rib plate is connected with the cross beam and located on at least one side of the cross beam.
[0013] Optionally, in an embodiment of the utility model, one rib plate is arranged on the two sides of the transverse beam of the pocket, two rib plates are located on the two sides of the first circular segment, and are respectively first rib plate and second rib plate, the first rib plate and the second rib plate are opposite bending, along the direction from the first circular segment to the second circular segment, the first rib plate and the second rib plate are arranged in staggered mode, and then the empty section is formed on the two sides.
[0014] Optionally, in an embodiment of the utility model, it further includes third rib plate, the third rib plate and the second rib plate are located on the same side of the first circular segment, along the direction from the first circular segment to the second circular segment, the third rib plate and the second rib plate are arranged in equal height mode, and the third rib plate and the second rib plate are opposite bending.
[0015] Optionally, in an embodiment of the utility model, the rib plate is ladder body structure bending towards the direction of the pocket.
[0016] Optionally, in an embodiment of the utility model, the two sides of the rib plate have empty section.
[0017] Optionally, in an embodiment of the utility model, the pocket contains rolling body, the rolling body is conical rolling body, and the pocket is conical pocket.
[0018] Optionally, in an embodiment of the utility model, the first circular segment, the second circular segment and the window beam are integrated structure.
[0019] Optionally, in an embodiment of the utility model, the corner of the pocket is round angle.
[0020] To realize the above-mentioned purpose, the utility model further proposes a bearing, including split type wear-resistant bearing retainer as described above.
[0021] Compared with the prior art, the utility model discloses at least the following beneficial effects. The bearing is an important component in the wind driven generator, as a kind of precision parts, the performance of each component part of bearing will influence the performance of bearing, and cage is not exceptional.The cage in the scheme is enclosed by at least two cage units, each cage unit includes first circular arc segment, second circular arc segment and window beam. Among them, two adjacent window beams and two circular arc segments enclose pocket hole, for accommodating rolling element, and the movement track of rolling element is limited in the rolling element operation process, guarantee the smooth rotation of rolling element. Considering the durability problem of cage, the material of wind power cage is usually metal, and other components of bearing, such as inner ring, outer ring and rolling element, are also metal material, when metal cage and other metal components contact, there is greater wear, leading to wear failure of cage or other components. Therefore, a layer of plastic wear-resistant layer is coated on the surface of cage, when cage and other components contact and rub, it is changed into the friction between metal and plastic. Generally speaking, the friction coefficient of plastic is lower than that of metal, so after coating plastic wear-resistant layer on the surface of cage, the wear degree when cage and other components rub can be reduced, and the durability of cage can be improved. The technical problem of poor durability of current wind power cage is solved. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings from the structures shown in these drawings without creating labor.
[0023] Fig. 1 It is the front view structural schematic drawing of the embodiment one of split type wear-resistant bearing cage of the utility model,
[0024] Fig. 2 It is the front view structural schematic drawing of the embodiment two of split type wear-resistant bearing cage of the utility model,
[0025] Fig. 3 It is the rear view structural schematic drawing of the embodiment two of split type wear-resistant bearing cage of the utility model.
[0026] EXPLANATION OF DRAWINGS:
[0027] 100, first circular arc segment;200, second circular arc segment;300, window beam;310, crossbeam;320, first rib plate;330, second rib plate;340, third rib plate;350, empty section;400, rolling element;
[0028] The purposes, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0030] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.
[0031] In the utility model, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.
[0032] In addition, if the embodiments of the utility model involve "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0033] The initial wind turbine cage design was not optimized. Analysis revealed a large number of metal particles from the cage within the lubricating grease, indicating severe cage wear during operation. Subsequent cage hardening treatments and the use of wear-resistant materials for the cage were also investigated. Analysis showed that because the hardened cage was harder than other components, a large number of metal particles from both the inner and outer bearing rings remained in the lubricating grease, leading to severe wear on both rings. In conclusion, simply hardening the cage is not the optimal way to improve bearing durability.
[0034] Reference Figs. 1-3 This utility model proposes a split-type wear-resistant bearing cage, which is formed by at least two cage units. The cage unit includes:
[0035] The first arc segment is 100;
[0036] The second arc segment 200 is arranged concentrically with the first arc segment 100 and is spaced at a predetermined distance from the first arc segment 100;
[0037] Window beam 300, one end of window beam 300 is connected to the first arc segment 100, and the other end is connected to the second arc segment 200. Multiple window beams 300 are arranged at intervals, and two adjacent window beams 300 form a pocket.
[0038] A plastic wear-resistant layer (not shown in the figure) is applied to the surfaces of the first arc segment 100, the second arc segment 200, and the window beam 300.
[0039] The bearing is an important component in the wind driven generator. As a kind of precision part, the performance of each component of the bearing will affect the performance of the bearing, and the retainer is no exception. The retainer in the scheme is enclosed by at least two retainer units, each of which includes a first circular arc segment 100, a second circular arc segment 200 and a window beam 300. Among them, the adjacent two window beams 300 and the two circular arc segments enclose the pockets for accommodating the rolling body 400 and limiting the movement track of the rolling body 400 during the operation of the rolling body 400, and ensuring the smooth rotation of the rolling body 400. Considering the durability of the retainer, the material of the wind power retainer is usually metal, and other components of the bearing such as the inner ring, the outer ring and the rolling body 400 are also metal materials. When the metal retainer comes into contact with other metal parts, it will cause great wear and tear, resulting in failure of the retainer or other parts. Therefore, a layer of plastic wear-resistant layer is coated on the surface of the retainer, and when the retainer comes into contact with other parts, it is changed into friction between metal and plastic. Generally speaking, the friction coefficient of plastic is lower than that of metal, so after coating a plastic wear-resistant layer on the surface of the retainer, the wear degree of the retainer and other parts when they come into friction can be reduced, and the durability of the retainer can be improved. The technical problem of poor durability of the current wind power retainer is solved. After adding the plastic wear-resistant layer, the durability of the retainer is improved by reducing the wear degree between the retainer and other parts.
[0040] In addition, after setting the plastic wear-resistant layer, the friction between the rolling body 400 and the retainer will be greatly reduced, the running speed will be improved, and the bearing can meet the requirement of high-speed operation of the wind driven generator.
[0041] Further, the window beam 300 includes a cross beam 310 and a rib plate, wherein the cross beam 310 connects the first circular arc segment 100 and the second circular arc segment 200, the rib plate is connected with the cross beam 310, and the rib plate is located at least on one side of the cross beam 310. The pockets are formed between the adjacent two window beams 300, the first circular arc segment 100 and the second circular arc segment 200 for accommodating the rolling body 400.
[0042] Specifically, the rolling body 400 in the scheme is a conical rolling body 400, and the shape of the pocket corresponds to the structure of the rolling body 400. After the conical rolling body 400 is installed into the pocket, the wrapping property of the cross beam 310 for the rolling body 400 is limited, and the wrapping property of the pocket is poor, that is, the gap between the rolling body 400 and the pocket is large, which is not convenient for lubrication of the rolling body 400, and also causes large amplitude vibration and noise during the operation of the rolling body 400. Therefore, the rib plate is arranged to improve the wrapping property of the pocket for the rolling body 400. After the rib plate is arranged, the rib plate is located on both sides of the pocket, and no matter the rolling body 400 rotates forward or reversely, the rib plate will abut against the rolling body 400 to prevent it from deviating during the operation.
[0043] Referring to Fig. 1 In the first embodiment, the cross beam 310 is provided with two ribs, i.e., a first rib 320 and a second rib 330, which are arranged on both sides of the cross beam 310 and on two adjacent cross beams 310 respectively. The first rib 320 and the second rib 330 are oppositely curved and limit the upper segment and the lower segment of the rolling body 400 respectively along the axial direction of the rolling body 400. Unlike the cage which limits the rolling body 400 in all directions, the cage is lightweight by reducing the number of ribs. The lightweight design of the cage facilitates the operation of the wind turbine and reduces the cost in the transportation and assembly process of the wind turbine.
[0044] Referring to Figs. 2-3 In the second embodiment, a third rib 340 is additionally provided, each rolling body 400 is limited by three ribs, and the second rib 330 and the third rib 340 cooperate to limit the rolling body 400 from both sides. After the third rib 340 is added, the limiting effect on the rolling body 400 is improved, and the stability of the rolling body 400 during operation is improved. In addition, after the third rib 340 is added, the rolling body 400 is not easy to slide out after being installed into the pocket during the assembly of the bearing, and the assembly efficiency of the bearing is improved.
[0045] Specifically, the rib is a curved ladder plate structure. The ladder has a bottom surface formed by a bottom edge and a top surface formed by a top edge, and the area of the bottom surface is greater than that of the top surface. The bottom surface of the first rib 320 is connected to the cross beam 310, and the bottom surfaces of the second rib 330 and the third rib 340 intersect, and the intersecting surface is connected to the cross beam 310. The rib in the ladder structure can more reasonably distribute the stress borne by the cage during operation, reduce the possibility of fatigue damage of the cage, and prolong the service life of the cage.
[0046] The two sides of the rib have a reserved section 350, one of the two reserved sections 350 is wider and the other is narrower, and the narrower reserved section 350 also allows the lubricating oil to flow. The reserved section 350 provides a path for the lubricating oil to run in the bearing. Although the rib structure hinders the flow of lubricating oil to a certain extent during the operation of the bearing, the reserved sections 350 on both sides of the rib do not completely block the flow path of the lubricating oil, and the lubricating oil can flow into the next pocket through the reserved sections 350 to lubricate the rolling body 400.
[0047] Further, the components in the cage are integrally formed. In the traditional processing method, the components need to be assembled by welding or other means, and defects such as welds, pores, and slag inclusions may be generated in the process, resulting in a decrease in the strength and durability of the product. Integrally forming can avoid these problems, and the surface of the cage is seamless or has no weak points, which can avoid the entry of moisture, salt mist, and the like into the inside of the cage to cause corrosion inside the cage.
[0048] The corners in the pockets are rounded, which can make the pockets more effectively disperse stress when stressed and avoid stress concentration. In addition, the curved surface design of the rounded corners is relatively easier to slide than the linear angle type, which helps the rolling body 400 smoothly roll in the pocket, improves the stability of the rolling body operation, and reduces vibration and noise.
[0049] The utility model also proposes a kind of bearing, the bearing includes the cage, inner ring, outer ring and rolling body as described above, specifically, the specific structure of cage refers to above embodiment, since the bearing has adopted all technical solutions of above embodiment, therefore at least have all beneficial effects brought by the technical solutions of above embodiment, here no longer repeat.
[0050] The above is only optional embodiment of the utility model, and does not limit the patent range of the utility model, and all equivalent structural transformations made by using the utility model specification and attached drawings under the inventive concept of the utility model or directly / indirectly applied in other related technical fields are included in the patent protection range of the utility model.
Claims
1. A split type wear-resistant bearing cage, characterized by, Surrounded by at least two cage units, the cage units include: A first circular arc segment; A second circular arc segment, which is arranged concentrically with the first circular arc segment and is spaced a predetermined distance from the first circular arc segment; Window beams, one end of the window beams is connected to the first circular arc segment, the other end is connected to the second circular arc segment, a plurality of window beams are arranged at intervals, and two adjacent window beams form a pocket hole; A plastic wear-resistant layer is coated on the surface of the first circular arc segment, the second circular arc segment and the window beams; A cross beam, one end of the cross beam is connected to the first circular arc segment, the other end is connected to the second circular arc segment; A rib plate is connected to the cross beam, one rib plate is arranged on both sides of the cross beam of the pocket hole, and two rib plates are located on both sides of the first circular arc segment, which are a first rib plate and a second rib plate, the first rib plate and the second rib plate are curved in opposite directions, and the first rib plate and the second rib plate are arranged in a staggered manner along the direction from the first circular arc segment to the second circular arc segment, thereby forming a reserved segment on both sides.
2. The split retainer for a rod end bearing as set forth in claim 1, wherein, A third rib plate is also included, which is located on the same side of the first circular arc segment as the second rib plate, the third rib plate and the second rib plate are arranged at the same height, and the third rib plate and the second rib plate are curved in opposite directions.
3. The split retainer for a rod end bearing as set forth in claim 1, wherein, The rib plate is a ladder structure curved towards the direction of the pocket hole.
4. The split retainer for a rod end bearing of claim 1 wherein, The pocket hole contains a rolling body, the rolling body is a conical rolling body, and the pocket hole is a conical pocket hole.
5. The split retainer for a rod end bearing of claim 1 wherein, The first circular arc segment, the second circular arc segment and the window beams are an integral structure.
6. The split retainer for a rod end bearing of claim 1 wherein, The corners of the pocket hole are rounded.
7. A bearing, characterized by A split wear-resistant bearing cage including any one of claims 1-6.