I-shaped common-edge segmented assembly type bearing retainer

Abstract

The invention discloses an I-shaped common-edge segmented assembly type bearing retainer. The I-shaped common-edge segmented assembly type bearing retainer comprises a plurality of segmented retainer elements and spliced window elements, each segmented retainer element is composed of two arc-shaped segments and a connecting window body between the two arc-shaped segments, semi-open window holes with single-side openings are formed in the two ends of each segmented retainer element, and splicing grooves are formed in the two ends of each arc-shaped segment; the adjacent sectional holder elements are connected through the spliced window body elements, so that the semi-open window holes are divided into independent closed window holes, and collision abrasion between adjacent arc-shaped sectional end window bodies is avoided. Due to the I-shaped common-edge design, the segmented retainer elements can share one part of window structures during assembly, namely window parts of adjacent elements are overlapped instead of being arranged side by side, so that space is saved, space possibility is provided for increasing the number of rolling bodies, and the bearing capacity and the running stability of the bearing are improved.

Description

Technical Field

[0001] This application belongs to the field of bearing cages, and particularly relates to a I-shaped common-edge segmented assembled bearing cage. Background Art

[0002] In high-power wind turbines, the main shaft and its bearings need to withstand huge wind loads. Therefore, their sizes will increase accordingly, which often leads to an increase in the weight of the entire main unit. For such large-sized bearings, the traditional one-piece cage is very inconvenient to install due to its large volume. To address this challenge, segmented cages are currently adopted. The components of this cage are lighter in weight and smaller in individual size, making it more convenient to install. However, the design of the segmented cage also brings some new problems. Since there are gaps between its components after installation, during transportation, there is collision and wear between the window beams at the adjacent ends of the cage, and there is a differential movement between the rollers and the cage. The rollers will impact the window beams of the cage. Under long-term complex load operation, the window beams break, especially the corners of the end window beams are extremely vulnerable to damage. Thus, the existing technology needs to be further improved. Summary of the Invention

[0003] The present invention provides an I-shaped common-edge segmented assembled bearing cage to at least solve or alleviate one or more technical problems in the prior art, or at least provide a beneficial alternative.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An I-shaped common-edge segmented assembled bearing cage includes a plurality of segmented cage elements and a spliced window element;

[0006] The segmented cage element is composed of two arc segments and the connecting window therebetween. Semi-open window holes with a single-side opening are formed at both ends of the segmented cage element, and splicing grooves are provided at both ends of the arc segment;

[0007] The spliced window element includes a window beam and insertion parts located at both ends of the window beam. The insertion parts are adapted to the shape of the splicing groove and are symmetrically arranged relative to the window beam. Adjacent segmented cage elements are connected through the spliced window element, so that the semi-open window holes are separated into independent closed window holes to avoid collision and wear between the end windows of adjacent arc segments.

[0008] In the above structure, by designing semi-open window holes and spliced window elements, after the adjacent segmented cage elements are assembled, the semi-open window holes are separated into independent closed window holes, effectively avoiding direct collision between the end windows of adjacent arc segments in the traditional segmented cage, thus reducing wear. The matching design of the insertion part of the spliced window element and the splicing groove ensures the stability of the connection. The design of the I-shaped common edge enables the segmented cage elements to share a part of the window structure during assembly, that is, the window parts of adjacent elements overlap rather than being arranged side by side, thus saving space and providing the possibility of increasing the number of rolling elements in terms of space, which helps to improve the bearing capacity and running smoothness of the bearing. Because the space originally used for window spacing can now be utilized more effectively, the segmented design makes the cage easy to disassemble and assemble, reducing the complexity of installation and maintenance. When a certain segmented cage element or spliced window element is damaged, it can be replaced individually without replacing the whole, reducing the maintenance cost.

[0009] In a preferred implementation, the insertion part and the window beam are connected by a dynamic reset structure. When the rolling element impacts the window beam, the window beam can generate displacement to absorb the impact force and reset to the initial position through the dynamic reset structure.

[0010] The displacement process is actually absorbing and dispersing the impact force. Compared with the traditional rigid connection, this design avoids the window beam directly bearing the full impact force, thus greatly reducing the risk of damage to the window beam, especially at the corners.

[0011] In a preferred implementation, the dynamic reset structure includes a receiving groove provided at the end of the window beam. A moving support pillar is provided in the receiving groove. The base of the insertion part is movably sleeved on the moving support pillar. A reset element is provided between the inner wall of the receiving groove and the base for resetting the window beam.

[0012] In a preferred implementation, the reset element is a spring. The spring is sleeved on the moving column, with one end connected to the inner wall of the receiving groove and the other end connected to the base. / The reset element is a magnet. The magnet is embedded inside the base of the insertion part, and two like-pole magnetic blocks are provided at the corresponding positions on the opposite inner walls of the receiving groove.

[0013] In a preferred implementation, a monitoring part is provided on the inner wall of the receiving groove to monitor the collision of the window beam and transmit the signal to the control system. The control system judges the impact frequency of the window beam for preventive maintenance.

[0014] Timely detect abnormal patterns. According to the monitoring results, carry out preventive maintenance in advance, such as replenishing lubricating oil, replacing worn rolling elements, adjusting the bearing installation, etc. It can provide a more intelligent and timely method for the maintenance of the cage of wind power bearings. This design not only helps to timely discover the potential causes of failures, but also improves the efficiency and accuracy of maintenance, thus prolonging the service life of the bearing and reducing the maintenance cost.

[0015] In a preferred implementation, the connecting window body is detachably connected to the arc-shaped segment. The connecting window body includes a connecting portion and a support beam. The connecting portion is connected to the arc-shaped segment, and the connecting portion and the support beam are connected through the dynamic reset structure.

[0016] In a preferred implementation, the arc-shaped segment is provided with a connecting groove, and the connecting portion is inserted into the connecting groove to realize the connection between the connecting window body and the arc-shaped segment.

[0017] In a preferred implementation, the cross-section of the splicing groove is T-shaped, and the insertion portion is designed to fit the shape of the T-shaped splicing groove. After the insertion portion is inserted into the splicing groove, it can tighten and fix the arc-shaped segments of adjacent segment retainer elements.

[0018] In a preferred implementation, cavities are provided inside the connecting window body and the window beam. A plurality of buffer elements are arranged in the cavities. The plurality of buffer elements occupy a part of the volume of the cavities and can move in the direction towards the window hole when the window beam is impacted to absorb the impact energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 A schematic structural view of a schematic embodiment of the I-shaped common-edge segmented assembled bearing retainer of the present application is shown;

[0021] Figure 2 Shown is Figure 1 An enlarged structural view of a schematic embodiment of part A in

[0022] Figure 3 A schematic three-dimensional structural view of a schematic embodiment of the splicing window body element of the present application is shown.

[0023] Reference Numerals:

[0024] 1. Arc-shaped segment; 10. Splicing groove; 11. Connecting groove; 2. Connecting window body; 20. Connecting portion; 21. Support beam; 3. Splicing window body element; 30. Window beam; 31. Insertion portion; 310. Base; 4. Dynamic reset structure; 40. Accommodating groove; 41. Moving column; 42. Reset element; 5. Cavity; 50. Buffer element. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the accompanying drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] The present invention will be described below in conjunction with the accompanying drawings of the specification.

[0027] The specific solution adopted is as follows:

[0028] As Figures 1-3 shown, the present invention provides an I-shaped co-edge segmented assembled bearing cage, including a plurality of segmented cage elements and a spliced window element 3;

[0029] The segmented cage element is composed of two arc segments 1 and a connecting window 2 therebetween. Semi-open window holes with one-sided openings are formed at both ends of the segmented cage element, and splicing grooves 10 are provided at both ends of the arc segment 1;

[0030] The spliced window element 3 includes a window beam 30 and insertion parts 31 located at both ends of the window beam 30. The insertion parts 31 are adapted to the shape of the splicing grooves 10 and are symmetrically arranged relative to the window beam 30. Adjacent segmented cage elements are connected by the spliced window element 3, so that the semi-open window holes are separated into independent closed window holes to avoid collision and wear between the end windows of adjacent arc segments 1.

[0031] In the above structure, by designing the semi-open window holes and the spliced window element 3, after adjacent segmented cage elements are assembled, the semi-open window holes are separated into independent closed window holes, effectively avoiding direct collision between the end windows of adjacent arc segments 1 in the traditional segmented cage, thereby reducing wear. The adapted design of the insertion parts 31 of the spliced window element 3 and the splicing grooves 10 ensures the stability of the connection. The I-shaped co-edge design enables the segmented cage elements to share a part of the window structure during assembly, that is, the window parts of adjacent elements overlap rather than being arranged side by side, thereby saving space and providing the possibility in terms of space to increase the number of rolling elements, which helps to improve the load-bearing capacity and running smoothness of the bearing, because the space originally used for window spacing can now be utilized more effectively. The segmented design makes the cage easy to disassemble and assemble, reducing the complexity of installation and maintenance. When a certain segmented cage element or the spliced window element 3 is damaged, it can be replaced individually without the need for overall replacement, reducing the maintenance cost.

[0032] As a preferred embodiment of the present application, the insertion part 31 and the window beam 30 are connected by a dynamic reset structure 4. When the rolling element impacts the window beam 30, the window beam 30 can generate displacement to absorb the impact force and be reset to the initial position through the dynamic reset structure.

[0033] When the rolling element impacts the window beam 30, the window beam 30 can generate a certain displacement through the dynamic reset structure, and this displacement process is actually absorbing and dispersing the impact force. Compared with the traditional rigid connection, this design avoids the window beam 30 directly bearing the full impact force, thus greatly reducing the risk of damage to the window beam 30, especially at the corners. The design of the dynamic reset structure allows the window beam 30 to quickly and accurately reset to the initial position after being impacted, which ensures the overall stability of the bearing cage and the normal movement of the rolling elements.

[0034] By introducing the dynamic reset structure, the bearing cage can better adapt to the complex and changeable load environment. Especially in applications such as wind turbines that need to bear huge and unstable loads, this design can significantly improve the durability and reliability of the cage.

[0035] As the first preferred embodiment of this implementation manner, refer to Figure 2 and Figure 3 , the dynamic reset structure includes a receiving groove 40 provided at the end of the window beam 30. A moving support pillar is provided in the receiving groove 40. The base 310 of the insertion portion 31 is movably sleeved on the moving support pillar. A reset element 42 is provided between the inner wall of the receiving groove 40 and the base 310 for resetting the window beam 30. The reset element 42 is a spring. The spring is sleeved on the moving column 41, with one end connected to the inner wall of the receiving groove 40 and the other end connected to the base 310.

[0036] When the rolling element impacts the window beam 30, the window beam 30 is subjected to an impact force and starts to move relative to the base 310 of the insertion portion 31. A gap is reserved between the window beam 30 and the arc segment 1, and this gap allows the window beam 30 to move freely when subjected to an external force (such as the impact of the rolling element) without any physical obstruction. As the window beam 30 moves, the spring between the inner wall of the receiving groove 40 and the base 310 is compressed. The compression process of the spring is actually absorbing and dispersing the impact force to protect the window beam 30 from direct damage. When the external force disappears, the spring starts to release the elastic potential energy it stores, and the window beam 30 moves towards the initial position to ensure the overall stability of the bearing cage and the normal movement of the rolling elements.

[0037] As the reset element 42, the spring can effectively absorb energy when the window beam 30 is impacted and make the window beam 30 quickly reset to the initial position through its elastic restoring force. The spring and the lubricating grease together constitute a damping system. When the window beam 30 moves, the compression and release of the spring and the viscous resistance of the lubricating grease act together to slow down the moving speed of the window beam 30 and increase the stability of the system. This damping effect helps to reduce the vibration and noise generated by rapid movement and improves the comfort of the overall system.

[0038] As an alternative technical solution, a magnet (assuming it is an N pole) is embedded in the base 310 of the plug-in portion 31, and two magnetic blocks of the same sex (also N poles) are arranged at the corresponding magnet positions on the two opposite inner walls of the receiving groove 40 to ensure that the magnetic forces are the same and in the same direction. When the window beam 30 is in the initial position, a repulsive force is generated between the magnet in the base 310 and the two magnets of the same sex on the inner wall of the receiving groove 40. Since the magnetic forces are the same and in opposite directions (both are N poles), a certain distance will be maintained between them, that is, the initial position of the window beam 30. When the window beam 30 is subjected to an external force (such as the impact of a rolling body), it will overcome the magnetic force and produce displacement. At this time, the magnetic force acts as a resistance to slow down the movement speed of the window beam 30 and absorb part of the impact force. When the external force disappears, the repulsive force between the magnet in the base 310 and the magnets of the same sex on the inner wall of the receiving groove 40 will resume its function and push the window beam 30 to move to the initial position. Since the magnetic force is constant, the window beam 30 can be quickly and accurately reset to the initial position, ensuring the stability and accuracy of the bearing retainer.

[0039] Compared with springs, the magnetic force provided by permanent magnets is more durable and stable. After long-term use, springs may weaken due to fatigue or wear, while the magnetic force of permanent magnets hardly changes over time, thereby ensuring that the window beam 30 can always accurately return to the initial position after being subjected to force.

[0040] In a further design, a monitoring member is provided on the inner wall of the receiving groove 40 to monitor the movement of the window beam 30 so as to determine the potential cause of the fault, so as to achieve preventive maintenance in advance. Specifically:

[0041] A magnetically controlled micro switch can be combined with a transmitter as a monitoring device to detect the movement of the base 310 and the inner wall of the receiving groove 40, that is, the window beam 30. The magnetically controlled micro switch is a switch controlled by a magnetic field. When the magnetic field reaches a certain intensity, the internal contacts of the switch will be closed or disconnected. The transmitter is used to convert the state information of the magnetically controlled micro switch (such as closed or disconnected) into an electrical signal and transmit it wirelessly or wired. The magnetically controlled micro switch and the transmitter are wrapped in a shell that isolates lubricating oil to protect them from grease corrosion. A magnet is set in the base 310, and the magnetism of the magnet interacts with the magnet in the magnetically controlled micro switch. When the window beam 30 moves, the magnet in the base 310 will move accordingly, approaching or moving away from the magnetically controlled micro switch.

[0042] Specifically, in the initial state, the magnetically controlled micro switch is in the off state. When the window beam 30 is hit and moves, the magnet in the base 310 approaches the magnetically controlled micro switch, closing the contacts inside the switch. After the contacts are closed, the circuit is turned on, and the transmitter receives the signal and transmits it, indicating that the window beam 30 has moved once (i.e., it has been hit once). By recording the number of times the signal is sent by the transmitter, the frequency of the window beam 30 being hit can be known.

[0043] The collected data can be analyzed to identify abnormal patterns of movement of the window beam 30. For example, if the movement frequency of the window beam 30 is abnormally high, it may indicate a problem inside the bearing. If the lubricating oil is insufficient, the friction between the rolling element and the window beam 30 will increase, causing the rolling element to hit the window beam 30 more frequently. Or the rolling element may be worn or damaged during long-term operation, causing changes in its shape, size or hardness. These changes will affect the movement trajectory and stability of the rolling element, thereby increasing the frequency of its impact on the window beam 30. It may also be that the bearing is improperly installed or loose, or the bearing may be subjected to overload or abnormal loads during operation. These loads will cause uneven force on the rolling element or generate additional impact forces. These impact forces will increase the frequency of the rolling element hitting the window beam 30.

[0044] Abnormal patterns can be discovered in time, and preventive maintenance can be performed in advance based on the monitoring results, such as adding lubricating oil, replacing worn rolling elements, adjusting bearing installation, etc. This can provide a more intelligent and timely method for the maintenance of wind turbine bearing cages. This design not only helps to discover potential causes of failures in a timely manner, but also improves the efficiency and accuracy of maintenance, thereby extending the service life of bearings and reducing maintenance costs.

[0045] As a preferred embodiment of the present application, the connecting window 2 is detachably connected to the arc segment 1, and the connecting window 2 includes a connecting portion 20 and a support beam 21, the connecting portion 20 connects the arc segment 1, and the connecting portion 20 and the support beam 21 are connected via the dynamic reset structure.

[0046] The connecting window 2 and the arc segment 1 are assembled in a detachable connection manner, wherein the connecting window 2 includes a connecting portion 20 and a supporting beam 21, the connecting portion 20 is used to connect the arc segment 1, and the connecting portion 20 and the supporting beam 21 are connected by a dynamic reset structure (such as an elastic rope). This design allows the beams in the entire retaining frame (including the window beam 30 and the supporting beam 21) to have a certain degree of mobility, so that they can absorb energy when an external impact occurs. During installation, the connecting window 2 and the arc segment 1 can be installed first to form a structure similar to an I-type, and then the adjacent arc segments 1 can be connected. For details, see Figure 1 The arc segment 1 is provided with a connecting groove 11 , and the connecting portion 20 is plugged into the connecting groove 11 to realize the connection between the connecting window 2 and the arc segment 1 .

[0047] As a preferred embodiment of the present application, the cross-section of the splicing groove 10 is T-shaped, and the insertion portion 31 is designed to fit the shape of the T-shaped splicing groove 10. After the insertion portion 31 is inserted into the splicing groove 10, it can tighten and fix the arc segment 1 of the adjacent segmented cage elements. Through the connection between the T-shaped splicing groove 10 and the insertion portion 31, the adjacent segmented cage elements form a more stable overall structure, which helps to improve the rigidity of the entire cage system and enhance its ability to bear external loads.

[0048] As a preferred embodiment of the present application, a cavity 5 is provided inside the connection window body 2 and the window beam 30. A plurality of buffer elements 50 are arranged in the cavity 5. The plurality of buffer elements 50 occupy a part of the volume of the cavity 5 and can move in the direction towards the window hole when the window beam 30 is impacted to absorb the impact energy. The buffer element 50 is a buffer sheet adapted to the shape of the cavity 5.

[0049] After the roller impacts the window beam 30 and causes the window beam 30 to move, during the process of resetting back to the initial position, it may impact the roller again. The window beam 30 may move again and cannot be stable at the initial position. At this time, the internal buffer sheet can play an energy absorption role by moving, reducing the rebound of the window beam 30. Similar to the principle of the existing dead hammer, the window beam 30 can quickly reach a stable state, so that the rotation of the rolling elements is more stable.

[0050] In the present invention, the parts not described can be realized by adopting or referring to the existing technologies.

[0051] The above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An I-type common edge segmented assembly type bearing retainer, characterized in that: It includes a plurality of segmented retainer components and a spliced ​​window component; The segmented retainer element is composed of two arc-shaped segments and a connecting window body therebetween. Semi-open window holes with one-side opening are formed at both ends of the segmented retainer element. Splicing grooves are provided at both ends of the arc-shaped segments. The spliced ​​window element includes a window beam and plug-in parts located at both ends of the window beam. The plug-in parts are adapted to the shape of the splicing groove and are symmetrically arranged relative to the window beam. Adjacent segmented retaining frame elements are connected through the spliced ​​window element to separate the semi-open window holes into independent closed window holes to avoid collision and wear between adjacent arc-shaped segmented end windows.

2. The I-shaped common edge segmented assembly type bearing retainer according to claim 1 is characterized in that: The plug-in part is connected to the window beam through a dynamic reset structure. When the rolling body hits the window beam, the window beam can be displaced to absorb the impact force and reset to the initial position through the dynamic reset structure.

3. The I-shaped common edge segmented assembly type bearing retainer according to claim 2 is characterized in that: The dynamic reset structure comprises a receiving groove arranged at the end of the window beam, a movable pillar is arranged in the receiving groove, the base of the plug-in part is movably sleeved on the movable pillar, and a reset element is arranged between the inner wall of the receiving groove and the base for resetting the window beam.

4. The I-shaped common edge segmented assembly type bearing retainer according to claim 3 is characterized in that: The reset element is a spring, which is sleeved on the movable column, one end of which is connected to the inner wall of the accommodating groove, and the other end is connected to the base. The reset element is a magnet, which is embedded in the base of the plug-in part, and two magnetic blocks with the same poles are arranged at the corresponding magnet positions on the inner wall of the accommodating groove.

5. The I-shaped common edge segmented assembly type bearing retainer according to claim 3 is characterized in that: The inner wall of the receiving groove is provided with a monitoring component to monitor the collision of the window beam and transmit the signal to the control system. The control system determines the impact frequency of the window beam to perform preventive maintenance.

6. The I-shaped common edge segmented assembly type bearing retainer according to claim 2, characterized in that: The connecting window is detachably connected to the arc-shaped segments. The connecting window comprises a connecting portion and a supporting beam. The connecting portion connects the arc-shaped segments. The connecting portion and the supporting beam are connected via the dynamic reset structure.

7. The I-shaped common edge segmented assembly type bearing retainer according to claim 6 is characterized in that: The arc-shaped segment is provided with a connecting groove, and the connecting part is plugged into the connecting groove to realize the connection between the connecting window and the arc-shaped segment.

8. The I-shaped common edge segmented assembly type bearing retainer according to claim 1, characterized in that: The cross section of the splicing groove is T-shaped, and the plug-in portion is adapted to the shape design of the T-shaped splicing groove. After the plug-in portion is inserted into the splicing groove, the arc-shaped segments of the adjacent segmented retaining frame elements can be tightened and fixed.

9. The I-shaped common edge segmented assembly type bearing retainer according to claim 1, characterized in that: A cavity is provided inside the connecting window body and the window beam, and a plurality of buffer elements are arranged in the cavity. The plurality of buffer elements occupy a part of the volume of the cavity and can move toward the window hole to absorb the impact energy when the window beam is impacted.

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