Gearbox high speed shaft seal arrangement
Patent Information
- Application Number
- CN202522770222.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-12-26
AI Technical Summary
[0002]风电齿轮箱作为风电机组的核心传动部件，其高速轴密封性能直接关系到机组的运行可靠性和运维成本，密封失效引发的漏油问题会导致轴承润滑不足、齿轮锈蚀等故障，影响机组的使用寿命
[0021]本实用新型提供一种齿轮箱高速轴密封装置，其包括甩油环、密封组件、第一盖体和第二盖体。甩油环套设于齿轮箱的轴体上，轴体上套设有轴承，甩油环靠近轴承的一端向外侧延伸有凸出部，凸出部远离轴承的一侧形成第一密封槽，第一密封槽沿甩油环的周向延伸设置，密封组件套设于轴体上，密封组件轴向的一端连接于轴承的外圈，密封组件的内周面与甩油环之间形成迷宫密封结构，至少部分迷宫密封结构位于第一密封槽内，能够对轴承喷油区域的油液形成精准且有效的阻挡，避免油液直接通过间隙发生泄漏。第一盖体和第二盖体均套设于轴体上，第一盖体与甩油环之间形成第一密封结构，第二盖体与甩油环之间形成第二密封结构，沿甩油环朝向远离轴承的方向，迷宫密封结构、第一密封结构和第二密封结构沿轴体的轴向依次设置，使得密封结构形成层层递进的拦截效果，避免后续密封结构直接承受大量油液冲击而发生磨损失效。通过上述设置，本申请的齿轮箱高速轴密封装置能够提高密封可靠性，减少漏油。
Smart Images
Figure CN224886262U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, and in particular to a high-speed shaft sealing device for gearboxes. Background Technology
[0002] As the core transmission component of a wind turbine, the high-speed shaft sealing performance of the wind turbine gearbox directly affects the operational reliability and maintenance costs of the unit. Oil leakage caused by seal failure can lead to insufficient bearing lubrication, gear corrosion, and other malfunctions, affecting the service life of the unit.
[0003] Currently, the sealing structure of the high-speed shaft of wind turbine gearbox has the following problems: most of the sealing structures are simple flat or single raised structures, which cannot effectively block the oil in the bearing oil spraying area, causing the oil to easily leak through the gap. They also cannot form a layer-by-layer interception effect, causing the subsequent sealing structure to directly bear a large amount of oil impact, thus making it prone to wear failure.
[0004] Therefore, there is an urgent need for a high-speed shaft sealing device for gearboxes to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this invention is to provide a high-speed shaft sealing device for gearboxes, which can improve sealing reliability and reduce oil leakage.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A high-speed shaft sealing device for a gearbox, comprising:
[0008] An oil slinger ring is sleeved on the shaft of the gearbox, and a bearing is sleeved on the shaft. The oil slinger ring has a protrusion extending outward from one end near the bearing. The side of the protrusion away from the bearing forms a first sealing groove, which extends circumferentially along the oil slinger ring.
[0009] A sealing assembly is sleeved on the shaft body. One axial end of the sealing assembly is connected to the outer ring of the bearing. A labyrinth seal structure is formed between the inner circumferential surface of the sealing assembly and the oil slinger ring. At least part of the labyrinth seal structure is located in the first sealing groove.
[0010] The first cover and the second cover are both sleeved on the shaft. The first cover and the oil slinger form a first sealing structure, and the second cover and the oil slinger form a second sealing structure. The labyrinth sealing structure, the first sealing structure and the second sealing structure are arranged sequentially along the axial direction of the shaft, in the direction away from the bearing, along the direction of the oil slinger.
[0011] Optionally, the sealing assembly includes an oil injection ring and an oil baffle ring. One end of the oil injection ring is connected to the outer ring of the bearing, which faces the end close to the oil slinger ring. One end of the oil baffle ring is connected to the other end of the oil injection ring. The inner circumferential surface of the oil baffle ring is provided with a plurality of second sealing grooves. The plurality of second sealing grooves are spaced apart along the axial direction of the shaft to form the labyrinth seal structure with the oil slinger ring.
[0012] Optionally, a first sealing cavity is formed between the oil slinger ring, the bearing, and the sealing assembly; a second sealing cavity is formed between the first cover, the sealing assembly, and the oil slinger ring; a third sealing cavity is formed between the second cover, the first cover, and the oil slinger ring; a labyrinth sealing structure is disposed between the first sealing cavity and the second sealing cavity; and the second sealing structure is disposed between the second sealing cavity and the third sealing cavity.
[0013] Optionally, the outer circumferential surface of the oil slinger ring located in the second sealing cavity and the third sealing cavity is provided with an oil slinger groove along its own circumferential direction.
[0014] Optionally, along the axial direction of the shaft, at least one sidewall of the oil slinger is set at an angle of 10°-80° to the radial direction of the shaft.
[0015] Optionally, the first sealing structure and / or the second sealing structure may include one or more of grooves, felt, and V-seals.
[0016] Optionally, the groove is provided on the inner circumferential surface of the first cover along its own circumferential direction.
[0017] Optionally, a first mounting groove is provided on the inner circumferential surface of the second cover along its own circumferential direction, and the felt is assembled in the first mounting groove.
[0018] Optionally, a second mounting groove is provided on the inner circumferential surface of the second cover, and the V-shaped seal is assembled in the second mounting groove, with the V-shaped seal positioned on the side of the felt facing away from the bearing.
[0019] Optionally, the gearbox high-speed shaft sealing device further includes a limiting member, which is sleeved on the shaft body and located between the bearing and the oil slinger ring, and the limiting member is configured to limit the inner ring of the bearing.
[0020] The beneficial effects of this utility model are:
[0021] This utility model provides a high-speed shaft sealing device for a gearbox, comprising an oil slinger ring, a sealing assembly, a first cover, and a second cover. The oil slinger ring is sleeved on the shaft of the gearbox, and a bearing is sleeved on the shaft. A protrusion extends outward from the end of the oil slinger ring near the bearing, and a first sealing groove is formed on the side of the protrusion away from the bearing. The first sealing groove extends circumferentially along the oil slinger ring. The sealing assembly is sleeved on the shaft, and one axial end of the sealing assembly is connected to the outer ring of the bearing. A labyrinth seal structure is formed between the inner circumferential surface of the sealing assembly and the oil slinger ring. At least a portion of the labyrinth seal structure is located within the first sealing groove, which can precisely and effectively block the oil in the bearing's oil spray area, preventing oil leakage through the gap. Both the first and second covers are fitted onto the shaft. A first sealing structure is formed between the first cover and the oil slinger ring, and a second sealing structure is formed between the second cover and the oil slinger ring. Along the direction away from the bearing, the labyrinth seal structure, the first sealing structure, and the second sealing structure are sequentially arranged along the axial direction of the shaft, creating a progressively layered interception effect. This prevents subsequent sealing structures from directly bearing the impact of large amounts of oil and thus avoiding wear failure. Through this arrangement, the gearbox high-speed shaft sealing device of this application can improve sealing reliability and reduce oil leakage. Attached Figure Description
[0022] Figure 1 This is a cross-sectional view of the gearbox high-speed shaft sealing device provided in this embodiment of the utility model;
[0023] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0024] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle.
[0025] In the picture:
[0026] 10. First sealing cavity; 20. Second sealing cavity; 30. Third sealing cavity; 40. Groove; 50. Felt; 60. V-seal; 100. Shaft; 200. Bearing; 1. Oil slinger ring; 11. First sealing groove; 12. Oil slinger groove; 13. Protrusion; 2. Sealing assembly; 21. Oil spray ring; 22. Oil baffle ring; 221. Second sealing groove; 3. First cover; 4. Second cover; 41. First mounting groove; 42. Second mounting groove; 5. Limiting element. Detailed Implementation
[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0028] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0032] like Figures 1-3As shown, this embodiment provides a high-speed shaft sealing device for a gearbox, which includes an oil slinger ring 1, a sealing assembly 2, a first cover 3, and a second cover 4. An oil slinger ring 1 is fitted onto the shaft 100 of the gearbox. A bearing 200 is fitted onto the shaft 100. The end of the oil slinger ring 1 near the bearing 200 extends outward with a protrusion 13. The side of the protrusion 13 away from the bearing 200 forms a first sealing groove 11. The first sealing groove 11 extends circumferentially along the oil slinger ring 1. A sealing assembly 2 is fitted onto the shaft 100. One axial end of the sealing assembly 2 is connected to the outer ring of the bearing 200. A labyrinth seal structure is formed between the inner circumferential surface of the sealing assembly 2 and the oil slinger ring 1. At least part of the labyrinth seal structure is located within the first sealing groove 11. A first cover 3 and a second cover 4 are both fitted onto the shaft 100. A first sealing structure is formed between the first cover 3 and the oil slinger ring 1. A second sealing structure is formed between the second cover 4 and the oil slinger ring 1. The labyrinth seal structure, the first sealing structure, and the second sealing structure are sequentially arranged along the axial direction of the shaft 100, in the direction away from the bearing 200 from the oil slinger ring 1.
[0033] In this embodiment, the oil slinger ring 1 is sleeved on the shaft 100 of the gearbox, and the shaft 100 is sleeved with a bearing 200. The end of the oil slinger ring 1 near the bearing 200 extends outward with a protrusion 13. The side of the protrusion 13 away from the bearing 200 forms a first sealing groove 11. The first sealing groove 11 extends circumferentially along the oil slinger ring 1. The sealing component 2 is sleeved on the shaft 100. One axial end of the sealing component 2 is connected to the outer ring of the bearing 200. The inner circumferential surface of the sealing component 2 and the oil slinger ring 1 form a labyrinth seal structure. At least part of the labyrinth seal structure is located in the first sealing groove 11, which can accurately and effectively block the oil in the oil spraying area of the bearing 200 and prevent the oil from leaking directly through the gap. The first cover 3 and the second cover 4 are both sleeved on the shaft 100. The first cover 3 and the oil slinger ring 1 form a first sealing structure, and the second cover 4 and the oil slinger ring 1 form a second sealing structure. Along the direction away from the bearing 200 from the oil slinger ring 1, the labyrinth seal structure, the first sealing structure, and the second sealing structure are sequentially arranged along the axial direction of the shaft 100, creating a progressively layered interception effect and preventing subsequent sealing structures from directly bearing the impact of a large amount of oil and causing wear failure. Through the above arrangement, the gearbox high-speed shaft sealing device of this embodiment can improve sealing reliability and reduce oil leakage.
[0034] The specific structure of the high-speed shaft sealing device of the gearbox is described below:
[0035] Specifically, such as Figures 1-3 As shown, the first sealing groove 11 has a "C"-shaped half-section along the axial direction of the shaft 100, which can provide a suitable accommodating space for the sealing component 2 and the oil slinger ring 1 to fit together, so that the labyrinth seal structure can be more stably embedded in the first sealing groove 11, thereby improving the accuracy of the sealing fit.
[0036] Specifically, the sealing assembly 2 includes an oil injection ring 21 and an oil baffle ring 22. One end of the oil injection ring 21 is connected to the outer ring of the bearing 200, facing towards the oil slinger ring 1, to ensure the overall stability of the oil injection ring 21 installation. One end of the oil baffle ring 22 is connected to the other end of the oil injection ring 21. The inner circumferential surface of the oil baffle ring 22 is provided with a plurality of second sealing grooves 221. The plurality of second sealing grooves 221 are spaced apart along the axial direction of the shaft 100 to form a labyrinth seal structure with the oil slinger ring 1. By setting the labyrinth seal structure, the interception effect of oil is improved, and oil leakage is avoided.
[0037] Specifically, a first sealing cavity 10 is formed between the oil slinger ring 1, the bearing 200, and the sealing assembly 2; a second sealing cavity 20 is formed between the first cover 3, the sealing assembly 2, and the oil slinger ring 1; and a third sealing cavity 30 is formed between the second cover 4, the first cover 3, and the oil slinger ring 1. By setting the first sealing cavity 10, the second sealing cavity 20, and the third sealing cavity 30, the oil can be contained and intercepted in stages, restricting the flow of the oil within the aforementioned sealing cavities and preventing the oil from directly impacting subsequent sealing structures. A labyrinth seal structure is set between the first sealing cavity 10 and the second sealing cavity 20, and a second sealing structure is set between the second sealing cavity 20 and the third sealing cavity 30, thereby further enhancing the layered interception effect of the oil and preventing direct oil leakage.
[0038] Specifically, the outer circumferential surface of the oil-slinging ring 1 located in the second sealing cavity 20 and the third sealing cavity 30 is provided with an oil-slinging groove 12 along its own circumferential direction. The oil is thrown into the second sealing cavity 20 and the third sealing cavity 30 by the centrifugal force generated by the rotation of the oil-slinging ring 1 with the shaft 100, so as to avoid the oil from accumulating in the gap between the first cover 3, the second cover 4 and the sealing assembly 2 and the oil-slinging ring 1, and to prevent the oil from breaking through the subsequent sealing structure due to excessive accumulation.
[0039] Specifically, along the axial direction of the shaft 100, at least one sidewall of the oil-slinging groove 12 is set at an angle of 10°-80° to the radial direction of the shaft 100. This optimizes the flow path of the oil within the oil-slinging groove 12, improves the efficiency of centrifugal oil slinging, and allows the oil to be slinged away more smoothly. The angle between at least one sidewall of the oil-slinging groove 12 and the radial direction of the shaft 100 can be set to 60° or 70°, as long as the aforementioned function is achieved; no further limitations are imposed here.
[0040] Specifically, the first sealing structure and / or the second sealing structure includes one or more of the following: groove 40, felt 50 and V-seal 60, which allows operators to flexibly configure the sealing form according to different sealing requirements, thereby improving the adaptability of the sealing structure and the overall sealing reliability.
[0041] Specifically, in this embodiment, the inner circumferential surface of the first cover 3 is provided with a groove 40 along its own circumferential direction, which can intercept oil in time, thereby further enhancing the oil interception capability of the first sealing structure.
[0042] More specifically, a first mounting groove 41 is provided on the inner circumferential surface of the second cover 4, and a felt 50 is fitted in the first mounting groove 41. Since the felt 50 can buffer and initially intercept the oil, and can also block external dust from entering, it can prevent the oil from directly impacting the subsequent sealing components, prevent dust from entering and causing wear, and improve the service life of the device.
[0043] Specifically, in this embodiment, a second mounting groove 42 is provided on the inner circumferential surface of the second cover 4, and a V-shaped seal 60 is assembled in the second mounting groove 42. The V-shaped seal 60 is placed on the side of the felt 50 facing away from the bearing 200, and can form a double contact seal with the felt 50. The V-shaped seal 60 can intercept the trace amount of oil that breaks through the felt 50, thereby further improving the sealing reliability of the second sealing structure.
[0044] More specifically, the opening of the V-seal 60 is set away from the shaft 100, so that the oil pressure in the third sealing cavity 30 can be used to make the lip of the V-seal 60 fit tightly with the second cover 4, thereby achieving a self-tightening seal and improving the sealing effect.
[0045] Specifically, the high-speed shaft sealing device of the gearbox also includes a limiting member 5, which is sleeved on the shaft body 100 and located between the bearing 200 and the oil slinger ring 1. The limiting member 5 is configured to limit the inner ring of the bearing 200, ensuring the stability of the bearing 200 installation and preventing axial movement of the bearing 200 on the shaft body 100. The limiting member 5 includes, but is not limited to, a nut or a retaining ring, and the specific structure of the limiting member 5 is not specified here.
[0046] Specifically, the fitting gap between the sealing component 2 and the oil slinger ring 1 is 0.1mm-0.3mm. This range can ensure the interception effect of the labyrinth seal structure on the oil, and also prevent friction and wear between the sealing component 2 and the oil slinger ring 1.
[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A high-speed shaft sealing device for a gearbox, characterized in that, include: An oil slinger ring (1) is sleeved on the shaft (100) of the gearbox. A bearing (200) is sleeved on the shaft (100). The oil slinger ring (1) has a protrusion (13) extending outward from one end near the bearing (200). A first sealing groove (11) is formed on the side of the protrusion (13) away from the bearing (200). The first sealing groove (11) extends circumferentially along the oil slinger ring (1). A sealing assembly (2) is sleeved on the shaft (100). One end of the sealing assembly (2) is connected to the outer ring of the bearing (200) in the axial direction. A labyrinth seal structure is formed between the inner circumferential surface of the sealing assembly (2) and the oil slinger ring (1). At least part of the labyrinth seal structure is located in the first sealing groove (11). The first cover (3) and the second cover (4) are both sleeved on the shaft (100). The first cover (3) and the oil slinger (1) form a first sealing structure, and the second cover (4) and the oil slinger (1) form a second sealing structure. Along the direction of the oil slinger (1) away from the bearing (200), the labyrinth sealing structure, the first sealing structure and the second sealing structure are arranged sequentially along the axial direction of the shaft (100).
2. The gearbox high-speed shaft sealing device according to claim 1, characterized in that, The sealing assembly (2) includes an oil injection ring (21) and an oil baffle ring (22). One end of the oil injection ring (21) is connected to the outer ring of the bearing (200) facing the end close to the oil slinger ring (1). One end of the oil baffle ring (22) is connected to the other end of the oil injection ring (21). The inner circumferential surface of the oil baffle ring (22) is provided with a plurality of second sealing grooves (221). The plurality of second sealing grooves (221) are spaced apart along the axial direction of the shaft (100) to form the labyrinth seal structure with the oil slinger ring (1).
3. The gearbox high-speed shaft sealing device according to claim 1, characterized in that, A first sealing cavity (10) is formed between the oil slinger ring (1), the bearing (200), and the sealing assembly (2). A second sealing cavity (20) is formed between the first cover (3), the sealing assembly (2), and the oil slinger ring (1). A third sealing cavity (30) is formed between the second cover (4), the first cover (3), and the oil slinger ring (1). The labyrinth sealing structure is disposed between the first sealing cavity (10) and the second sealing cavity (20). The second sealing structure is disposed between the second sealing cavity (20) and the third sealing cavity (30).
4. The gearbox high-speed shaft sealing device according to claim 3, characterized in that, The outer circumferential surface of the oil-throwing ring (1) located in the second sealing cavity (20) and the third sealing cavity (30) is provided with an oil-throwing groove (12) along its own circumferential direction.
5. The gearbox high-speed shaft sealing device according to claim 4, characterized in that, Along the axial direction of the shaft (100), at least one sidewall of the oil slinger (12) is set at an angle of 10°-80° to the radial direction of the shaft (100).
6. The gearbox high-speed shaft sealing device according to claim 1, characterized in that, The first sealing structure and / or the second sealing structure includes one or more of a groove (40), a felt (50), and a V-seal (60).
7. The gearbox high-speed shaft sealing device according to claim 6, characterized in that, The groove (40) is provided on the inner circumferential surface of the first cover (3) along its own circumferential direction.
8. The gearbox high-speed shaft sealing device according to claim 6, characterized in that, The second cover (4) has a first mounting groove (41) on its inner circumferential surface, and the felt (50) is assembled in the first mounting groove (41).
9. The gearbox high-speed shaft sealing device according to claim 8, characterized in that, The second cover (4) has a second mounting groove (42) on its inner circumferential surface, and the V-shaped seal (60) is assembled in the second mounting groove (42). The V-shaped seal (60) is placed on the side of the felt (50) facing away from the bearing (200).
10. The gearbox high-speed shaft sealing device according to any one of claims 1-9, characterized in that, The gearbox high-speed shaft sealing device also includes a limiting member (5), which is sleeved on the shaft body (100) and located between the bearing (200) and the oil slinger ring (1). The limiting member (5) is configured to limit the inner ring of the bearing (200).