Sealing structure, main shaft bearing sealing system and equipment
By designing a multi-stage sealing structure and adjusting the radial force and contact area of the sealing part, the problem that traditional sealing structures cannot be completely sealed is solved, and efficient sealing of the spindle bearings is achieved to prevent leakage of lubricating media.
Patent Information
- Application Number
- CN202422170372.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-04
AI Technical Summary
The traditional sealing structure cannot achieve complete and effective sealing of the spindle bearings, especially in wind turbine units, the leakage problem of lubricating medium is difficult to solve.
A multi-stage sealing structure is designed, including a plurality of sealing parts abutting the main shaft, a recessed area and a sealing part with different inclination angles, and the sealing effect is improved by adjusting the radial force and contact area of the sealing part.
The number of contact surfaces and contact area between the sealing structure and the main shaft is enhanced, effectively preventing leakage of lubricating medium and improving the sealing effect.
Smart Images
Figure CN223178164U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of bearing seals, and particularly relates to a sealing structure, a main shaft bearing sealing system and a device. Background Art
[0002] In wind turbines, bearing lubrication has attracted much attention. Among them, the main shaft bearing sealing system is an important structure to ensure the continuous and stable operation of wind turbines. Its main function is to prevent the leakage of lubricating media (such as lubricating oil, grease) to ensure that the main shaft bearing operates in a good lubrication system. However, with the update and iteration of wind turbines, the main bearing lubrication system methods show diversity (such as oil lubrication, grease lubrication). The traditional sealing method, which uses the line contact diameter of a single lip and the shaft to apply a radial contact pressing force to seal the lubricating medium, cannot achieve completely effective sealing. Summary of the Utility Model
[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a sealing structure, a main shaft bearing seal and a device, which can effectively improve the sealing effect of the main shaft.
[0004] The sealing structure according to an embodiment of one aspect of this application includes:
[0005] A skeleton;
[0006] A sealing body connected to the skeleton on one side, and on the other side of the sealing body, a plurality of sealing parts are arranged at intervals along a first direction. The free end of each sealing part, which is away from the skeleton, is used to abut against the main shaft. Among them, a concave area extending along the first direction is arranged on the sealing body at the position between the skeleton and the sealing part.
[0007] Further, the free end of each sealing part is offset towards the side of the sealing body with the concave area.
[0008] Further, each of the sealing parts is parallel to each other.
[0009] Further, the number of the sealing parts is three. Along the first direction, each of the sealing parts is a first lip, a second lip and a third lip in sequence.
[0010] Further, in a second direction perpendicular to the first direction, the starting point of the extension of the first lip is closer to the skeleton than the starting point of the extension of the second lip, and the starting point of the extension of the second lip is closer to the skeleton than the starting point of the extension of the third lip.
[0011] Further, in a second direction perpendicular to the first direction, the extension end point of the first lip is farther from the skeleton than the extension end point of the second lip, and the extension end point of the second lip is farther from the skeleton than the extension end point of the third lip.
[0012] Further, the sealing body further includes a connecting portion, one side of the connecting portion is connected to the skeleton, and the other side of the connecting portion is a partial side wall of the concave region.
[0013] Further, along the direction away from the concave region, the profile width of the connecting portion in a cross-section perpendicular to the first direction gradually decreases.
[0014] Further, a plurality of the sealing portions enclose a plurality of sealing cavities for storing lubricating medium in the first direction. [[ID=1ill]]
[0015] A spindle bearing sealing system according to another embodiment of the present application includes a spindle and the sealing structure as described above, and each sealing portion of the sealing structure abuts against the outer wall of the spindle.
[0016] An apparatus according to yet another embodiment of the present application includes the spindle bearing sealing system as described above.
[0017] The sealing structure, the spindle bearing sealing system and the apparatus according to the embodiments of the present application at least have the following beneficial effects: In the embodiments of the present application, the sealing structure is provided with multiple sealing portions, and the multiple sealing portions all abut against the spindle, which can increase the number of abutting surfaces between the sealing structure and the spindle. Among them, the sealing portion located on the outer side can achieve dust prevention on the outer side of the equipment using the oil seal, and the sealing portion located on the inner side can achieve oil prevention on the inner side of the equipment using the oil seal. When the number of sealing portions is greater than two, the middle sealing portion abutting against the spindle can further enhance the sealing effect of the sealing structure. In this way, the sealing effect of the sealing structure can be effectively improved.
[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following will further illustrate the present application with reference to the drawings and embodiments, where:
[0020] Figure 1 is a schematic structural diagram of a spindle in an embodiment of the present application;
[0021] Figure 2 is one of the schematic structural diagrams of the sealing structure in an embodiment of the present application.
[0022] Reference numerals:
[0023] 100, spindle;
[0024] 200. End cap
[0025] 310. Skeleton; 320. Sealing body; 3211. First lip; 32111. First extension starting point; 32112. First extension ending point; 3212. Second lip; 32121. Second extension starting point; 32122. Second extension ending point; 3213. Third lip; 32131. Third extension starting point; 32132. Third extension ending point; 3214. Sealing cavity; 322. Concave area; 323. Connecting part Detailed implementation manners
[0026] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application
[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application
[0028] In the description of the present application, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the recited number, and understandings such as above, below, within, etc. include the recited number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features
[0029] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution
[0030] In the description of the present application, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0031] See Figure 1 , Figure 1 which shows a partial structural schematic diagram of a device.
[0032] As Figure 1 shown, in one embodiment of the present application, a device is disclosed. The device includes an end cap 200, a main shaft 100, and a sealing structure. Among them, the sealing structure is installed on the end cap 200, and multiple sealing parts in the sealing structure are all in contact with the main shaft 100. By installing the sealing structure between the end cap 200 and the main shaft 100, sealing between the end cap 200 and the main shaft 100 can be achieved.
[0033] In the embodiments of the present application, the above device can be a wind turbine generator set or other devices that use a main shaft and a sealing structure, which is not limited herein.
[0034] Figure 2 which shows a structural schematic diagram of a sealing structure of an embodiment.
[0035] See Figure 1 and Figure 2 shown, in another embodiment of the present application, a sealing structure is disclosed. The sealing structure includes a skeleton 310 and a sealing body 320.
[0036] Specifically, the skeleton 310 is used to connect with the end cap 200 so that the sealing structure is installed on the end cap 200 through the skeleton 310; one side of the sealing body 320 is connected to the skeleton 310, and the other side of the sealing body 320 is provided with multiple sealing parts arranged at intervals in a first direction. The free end of each sealing part away from the skeleton 310 is used to contact the main shaft 100. Among them, a recessed area 322 extending in the first direction is provided on the sealing body 320 between the skeleton 310 and the sealing part.
[0037] In the embodiments of the present application, the recessed area 322 means that the surface profile of the recessed area 322 is not in the same plane as the area outside the recessed area 322. The starting point of the extension of the recessed area 322 is based on the surfaces on both sides of the recessed area 322 as a reference, and the recessed area 322 generally presents as a groove.
[0038] It should be noted that the first direction refers to Figure 1 or Figure 2 the X direction in Figure 1 or Figure 2 the Y direction in
[0039] In the embodiments of the present application, the sealing structure is provided with multiple sealing parts, and the multiple sealing parts are all in contact with the main shaft 100, which can increase the number of contact surfaces between the sealing structure and the main shaft 100. Among them, the sealing part located on the outer side can achieve dust prevention on the outer side of the oil seal using device, and the sealing part located on the inner side can achieve oil prevention on the inner side of the oil seal using device. When the number of sealing parts is greater than two, the contact between the middle sealing part and the main shaft 100 can further enhance the sealing effect of the sealing structure. In this way, the sealing effect of the sealing structure can be effectively improved.
[0040] In the embodiments of the present application, in the second direction, that is Figure 1 or Figure 2 the Y direction in
[0041] In this embodiment, the concave area 322 of the sealing body 320 is denoted as the waist. Refer to Figure 1 and Figure 2 As shown, along the second direction, one side of the waist is the skeleton 310, and the other side is the sealing part. By changing the thickness of the waist along the first direction (i.e., the X direction), the radial force exerted by the sealing part on the main shaft 100 can be changed.
[0042] In some embodiments of the present application, the cross-section of the waist presents a U shape, that is, the cross-section of the concave area presents a U shape.
[0043] In some embodiments, the inclination angle of the sealing part is adjusted in correlation with the thickness of the waist in the first direction and the angle of the "U" shape opening of the waist. In this way, the magnitude of the radial force exerted by the sealing structure on the main shaft 100 can be adjusted by simultaneously or separately adjusting the thickness of the waist in the first direction and the opening angle of the U shape of the waist.
[0044] In some embodiments of the present application, refer to Figure 1 and Figure 2, the free end of each sealing part is offset towards the side of the sealing body 320 with the concave area 322. Specifically, the side of the sealing body 320 with the concave area 322 is located inside the oil seal using device, and each sealing part is arranged towards the inside of the oil seal using device. The free ends of the respective sealing parts are inclined towards the inside of the oil seal using device. When the respective sealing parts are squeezed against the main shaft 100 and deformed, the contact area between each sealing part and the outer wall of the main shaft 100 can be increased, thereby improving the sealing effect.
[0045] In some embodiments of the present application, referring to Figure 1 and Figure 2 , each sealing part is parallel to each other. Specifically, the sealing structure is in an annular structure, the sealing structure is sleeved on the outer periphery of the main shaft 100, and each sealing part abuts against the outer wall of the main shaft 100. Each sealing part is parallel to each other, so that the distance between any two adjacent sealing parts is equal. In this way, after the sealing structure is assembled with the main shaft 100, any two adjacent sealing parts will not contact each other, which helps each sealing part to have a sealing function, thereby improving the sealing effect of the sealing structure.
[0046] It should be noted that the number of sealing parts of the sealing structure in the embodiments of the present application can be two, three, four, five or even more, which is not limited herein.
[0047] It can be understood that the more the number of sealing parts, the more contact surfaces between the sealing parts and the main shaft 100, and the higher the overall sealing performance of the sealing structure, but the heat generation will also increase accordingly.
[0048] In some embodiments of the present application, referring to Figure 1 and Figure 2 , the number of sealing parts is three. Along the first direction, the respective sealing parts are the first lip 3211, the second lip 3212 and the third lip 3213 in sequence. Specifically, there is a gap between the first lip 3211 and the second lip 3212, and they jointly enclose a sealing cavity 3214 with the main shaft 100; there is a gap between the second lip 3212 and the third lip 3213, and they also jointly enclose a sealing cavity 3214 with the main shaft 100. The respective sealing cavities 3214 are distributed in sequence along the first direction (i.e., the X direction), and each sealing cavity 3214 can accommodate a certain amount of lubricating medium. The multiple sealing parts enclose multiple sealing cavities 3214 that can be used to store the lubricating medium in the first direction. The lubricating medium inside the oil seal using device needs to pass through multiple sealing cavities 3214 in sequence before it can leak to the outside. That is to say, it helps to improve the sealing performance of the sealing structure.
[0049] Among them, the lubricating medium can be lubricating oil, grease, etc.
[0050] In this embodiment, the first lip 3211, the second lip 3212, and the third lip 3213 achieve sealing by abutting against the main shaft 100. The interference of the first lip 3211 is greater than that of the second lip 3212 which is greater than that of the third lip 3213. It can be understood that the interference affects the radial force exerted by the lips on the main shaft 100. The greater the radial force, the better the sealing effect, but the heat generation will also increase.
[0051] In some embodiments of the present application, referring to Figure 1 and Figure 2 , in the second direction perpendicular to the first direction, the starting point of the extension of the first lip 3211 is closer to the skeleton 310 than the starting point of the extension of the second lip 3212, and the starting point of the extension of the second lip 3212 is closer to the skeleton 310 than the starting point of the extension of the third lip 3213. Specifically, the starting point of the extension of the first lip 3211 is the first starting point 32111, the starting point of the extension of the second lip 3212 is the second starting point 32121, and the starting point of the extension of the third lip 3213 is the third starting point 32131.
[0052] In the above embodiment, the skeleton 310 is parallel to the main shaft 100. In the second direction, the starting point of the extension of the first lip 3211 is closer to the skeleton 310 than the starting point of the extension of the second lip 3212. Since both the first lip 3211 and the second lip 3212 abut against the main shaft 100. That is to say, the distance from the starting point of the extension of the first lip 3211 to the abutting point of the first lip 3211 and the main shaft 100 is longer. Therefore, the first lip 3211 is more prone to deformation than the second lip 3212, so that the contact area between the first lip 3211 and the main shaft 100 in abutment is larger, and thus the lubricating medium inside the oil seal using device can be isolated by the first lip 3211. At the same time, the first lip 3211 is more prone to deformation than the second lip 3212, that is, the radial force of the second lip 3212 on the main shaft 100 is greater than the radial force of the first lip 3211 on the main shaft 100, and the radial force of the third lip 3213 on the main shaft 100 is greater than that of the second lip 3212. The radial forces of each lip on the main shaft 100 increase step by step, which helps to further improve the sealing effect.
[0053] In some embodiments of the present application, referring to Figure 1 and Figure 2 , in the second direction perpendicular to the first direction, the ending point of the extension of the first lip 3211 is farther from the skeleton 310 than the ending point of the extension of the second lip 3212, and the ending point of the extension of the second lip 3212 is farther from the skeleton 310 than the ending point of the extension of the third lip 3213. Specifically, the ending point of the extension of the first lip 3211 is the first ending point 32112, the ending point of the extension of the second lip 3212 is the second ending point 32122, and the ending point of the extension of the third lip 3213 is the third ending point 32132.
[0054] In the above embodiments, in the second direction, the first extension end point 32112 is farther from the skeleton 310 than the second extension end point 32122, that is to say, the distance from the first extension start point 32111 to the first extension end point 32112 is longer than the distance from the second extension start point 32121 to the second extension end point 32122. Therefore, the first lip 3211 is more easily deformed than the second lip 3212. At the same time, the radial length of the first lip 3211 is longer, so that the contact area between the first lip 3211 and the main shaft 100 is larger, thereby improving the sealing effect between the first lip 3211 and the main shaft 100. At the same time, the first lip 3211 is more easily deformed than the second lip 3212, that is, the radial force of the second lip 3212 on the main shaft 100 is greater than the radial force of the first lip 3211 on the main shaft 100, and the radial force of the third lip 3213 on the main shaft 100 is greater than that of the second lip 3212. The radial forces of each lip on the main shaft 100 increase step by step, which helps to further improve the sealing effect.
[0055] In some embodiments of the present application, referring to Figure 1 and Figure 2 , the sealing main body 320 further includes a connecting portion 323. One side of the connecting portion 323 is connected to the skeleton 310, and the other side of the connecting portion 323 is a partial side wall of the concave region 322.
[0056] Furthermore, along the direction away from the concave region 322, that is Figure 1 or Figure 2 the opposite direction of the X direction in
[0057] In some embodiments of the present application, the skeleton 310 is made of multi-layer canvas or high-hardness rubber material. Exemplarily, the skeleton 310 is made of nitrile rubber. ]>
[0058] In some embodiments of the present application, the entire sealing structure is made by turning with the same kind of PU (polyurethane) material. Specifically, when using the PU turning process, no mold is required, which can save the production cost and time of the mold. At the same time, when using the turning process, the production efficiency for single-piece or small-batch production is high. When using the turning process, it is easier to modify the product size and no mold needs to be repaired. In addition, the product size of the sealing structure obtained by turning has good stability, which can effectively ensure the sealing performance of the sealing structure.
[0059] In some embodiments of the present application, the sealing main body 320 is made of a low-hardness rubber material.
[0060] In a possible implementation, the framework 310 includes multiple layers of canvas or high-hardness NBR (nitrile butadiene rubber), the sealing body 320 includes a low-hardness rubber material, and the framework 310 and the sealing body 320 are integrally molded and vulcanized to form a sealing structure.
[0061] It can be understood that using a low-hardness rubber material for the sealing body 3 is more conducive to reducing the heat generated after friction with the main shaft 100, helping to ensure the normal operation of the sealing structure, and thus ensuring its sealing performance.
[0062] Another embodiment of the present application discloses a main shaft bearing sealing system, including a main shaft 100 and the sealing structure as described above. Each sealing part of the sealing structure abuts against the outer wall of the main shaft 100 to achieve sealing.
[0063] It is worth understanding that the main shaft bearing sealing system of the embodiments of the present application has all the technical effects of the foregoing sealing structure, which will not be elaborated here.
[0064] The embodiments of the present application have been described in detail above with reference to the drawings. However, the present application is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art, various changes can be made without departing from the purpose of the present application. In addition, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
Claims
1. A sealing structure, characterized in that, Comprising: A framework; A sealing body connected to the framework on one side, with a plurality of sealing portions spaced along a first direction provided on the other side of the sealing body. The free end of each sealing portion, which is away from the framework, is adapted to abut against the main shaft. Wherein, a recessed area extending along the first direction is provided on the sealing body at a position between the framework and the sealing portion.
2. The sealing structure according to claim 1, wherein, The free end of each sealing portion is offset towards the side of the sealing body having the recessed area.
3. The sealing structure according to claim 1, wherein Each of the sealing portions is parallel to each other.
4. The sealing structure according to any one of claims 1 to 3, characterized in that, The number of the sealing portions is three. Along the first direction, the respective sealing portions are a first lip portion, a second lip portion and a third lip portion in sequence.
5. The sealing structure according to claim 4, characterized in that, In a second direction perpendicular to the first direction, the starting point of the extension of the first lip portion is closer to the framework than the starting point of the extension of the second lip portion, and the starting point of the extension of the second lip portion is closer to the framework than the starting point of the extension of the third lip portion.
6. The sealing structure according to claim 4, wherein In a second direction perpendicular to the first direction, the ending point of the extension of the first lip portion is farther from the framework than the ending point of the extension of the second lip portion, and the ending point of the extension of the second lip portion is farther from the framework than the ending point of the extension of the third lip portion.
7. The sealing structure according to claim 1, characterized in that, The sealing body further includes a connecting portion. One side of the connecting portion is connected to the framework, and the other side of the connecting portion is a partial side wall of the recessed area.
8. The sealing structure according to claim 4, characterized in that, The plurality of sealing portions enclose a plurality of sealing cavities in the first direction that can be used to store a lubricating medium.
9. A main shaft bearing sealing system, characterized in that, Comprising a main shaft and the sealing structure according to any one of claims 1 to 8, and each sealing portion of the sealing structure abuts against the outer wall of the main shaft.
10. A device, characterized in that, Comprising the main shaft bearing sealing system according to claim 9.