Oil sealing structure for wind power slip ring

Abstract

The utility model relates to wind power equipment technical field discloses the oil sealing structure for wind power slip ring, the utility model discloses a slip ring casing, top bolt flange disc connection;Connecting assembly sets two, and sets up in the slip ring casing bottom;Gearbox main shaft, bolt is in flange disc top;Oil -proof subassembly sets up in the slip ring casing top, and is located gearbox main shaft inside;Sealing module sets up in the slip ring casing top, and is located oil -proof subassembly outer periphery, and sets up in flange disc inside, through multilayer sealing design, including the seal of holding tightly, static seal and dynamic seal, effectively prevent the lubricating oil infiltration slip ring inside, ensure the normal operation of slip ring, significantly improved the reliability and service life of equipment. Meanwhile, the design of the oil collecting groove and the sealing cover facilitates the cleaning of the infiltrated oil, reduces the maintenance cost and improves the convenience of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, specifically to an oil sealing structure for wind turbine slip rings. Background Technology

[0002] In wind power generation systems, slip rings are key components connecting the generator and external circuitry, used to transmit power and signals between rotating and stationary parts. Slip rings are typically installed inside or directly connected to the gearbox, and their sealing performance is crucial for ensuring the proper functioning of the equipment.

[0003] In existing technologies, wind turbine slip ring seals mostly employ a single O-ring seal or a simple labyrinth seal structure, relying primarily on static seals to prevent oil intrusion. However, these structures are prone to seal failure after long-term operation due to vibration, aging, or assembly errors, and lack the capacity to collect and contain trace amounts of leaked oil. Furthermore, the wiring harness entry points often use adhesive sealing or crimping methods, making it difficult to achieve uniform tightness and leaving a risk of oil leakage along the line sheath. The overall sealing solution lacks a multi-level protection mechanism, failing to meet the long-term oil resistance requirements of high-reliability wind turbine equipment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an oil sealing structure for wind turbine slip rings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an oil sealing structure for wind turbine slip rings, comprising a slip ring housing with a flange bolted to the top; two sets of connecting components, located at the bottom of the slip ring housing; a gearbox main shaft with bolts on the top of the flange; an oil-proof component, located at the top of the slip ring housing and inside the gearbox main shaft; and a sealing module, located at the top of the slip ring housing, on the outer periphery of the oil-proof component, and inside the flange.

[0006] As a further description of the above technical solution: The connection assembly includes: a connector disposed on both sides of the bottom of the slip ring housing; and a cable disposed on both sides inside the slip ring housing, with the bottom bolted to the top of the connector.

[0007] As a further description of the above technical solution: The oil-proof component includes: an oil-proof connector, disposed on the top of the slip ring housing and located inside the gearbox main shaft; a locking nut, threadedly connected to the top of the oil-proof connector; a wiring harness, disposed inside the gearbox main shaft, passing through the locking nut, and welded to the cable at its bottom; and a third sealing ring, disposed at the connection point between the top of the slip ring housing and the oil-proof connector.

[0008] As a further description of the above technical solution: The oil-proof connector and the top of the slip ring housing are respectively provided with grooves for engaging the third sealing ring.

[0009] As a further description of the above technical solution: The sealing module includes: a static sealing component disposed on the outer periphery of the connection between the oil-proof joint and the slip ring housing, and located inside the flange; and a dynamic sealing component disposed on the outer periphery of the connection between the oil-proof joint and the slip ring housing, and located inside the flange, and located at the bottom of the static sealing component.

[0010] As a further description of the above technical solution: The static sealing assembly includes: a static annular groove, disposed on the outer periphery of the oil-proof joint and located inside the flange, with a groove formed on its outer periphery; a first sealing ring, disposed in the groove at the connection between the static annular groove and the flange; an oil reservoir, formed around the inside of the static annular groove; an oil collection groove, formed inside the flange and communicating with the oil reservoir at one point; and a sealing cap, bolted to the outer side of the flange near the oil collection groove, with a sealing strip on its outer periphery.

[0011] As a further description of the above technical solution: The dynamic sealing assembly includes: a sealing sleeve, which is rotatably disposed on top of the slip ring housing and located inside the flange and at the bottom of the static ring groove, with a groove on its outer periphery; a slip ring, disposed on top of the sealing sleeve and engaged in the bottom groove of the static ring groove; and a second sealing ring, disposed in the groove at the connection between the sealing sleeve and the flange.

[0012] This utility model has the following beneficial effects: 1. By setting up a collaborative structure of oil-proof components and sealing modules, dual protection is achieved: the oil-proof connector contracts radially under the action of the locking nut, tightly hugging the outer sheath of the wiring harness to form a first-level seal, effectively preventing oil from the gearbox side from entering along the wiring; at the same time, the trace amount of oil that seeps in from the outside is collected by the oil storage tank in the static ring groove, and is guided into the oil collection tank for temporary storage under the action of centrifugal force, avoiding entry into the slip ring housing and ensuring the safety of the electrical system.

[0013] 2. By adopting a dynamic-static separation design, the static sealing component achieves reliable static sealing and oil collection functions, while the dynamic sealing component combines rotary sealing and slip ring conductive connection. The overall structure is compact, the sealing is reliable, and the maintainability is strong, which significantly improves the operational stability and service life of wind power slip rings in high humidity, vibration, and oil pollution environments. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram of the sealing oil structure for wind turbine slip rings proposed in this utility model; Figure 2 This is a half-sectional view of the slip ring housing and the gearbox main shaft of the oil sealing structure for wind power slip rings proposed in this utility model; Figure 3 This is a diagram showing the internal structure of the oil-proof component and sealing module of the oil-sealing structure for wind turbine slip rings proposed in this utility model. Figure 4 The present invention provides an oil sealing structure for wind turbine slip rings. Figure 3 Enlarged view at point A; Legend: 1. Slip ring housing; 11. Flange; 2. Connecting assembly; 21. Connector; 22. Cable; 3. Gearbox main shaft; 4. Oil-proof assembly; 41. Oil-proof connector; 42. Locking nut; 43. Wiring harness; 44. Third sealing ring; 5. Sealing module; 51. Static sealing assembly; 511. Static ring groove; 512. First sealing ring; 513. Oil reservoir; 514. Oil collection tank; 515. Sealing cover; 52. Dynamic sealing assembly; 521. Sealing sleeve; 522. Slip ring; 523. Second sealing ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 according to the specific circumstances. Example 1

[0018] like Figures 1 to 4 As shown, the oil sealing structure for wind turbine slip rings provided in this embodiment includes: a slip ring housing 1 with a flange 11 bolted to the top; two sets of connecting components 2, which are located at the bottom of the slip ring housing 1; a gearbox main shaft 3 with bolts to the top of the flange 11; an oil-proof component 4, which is located at the top of the slip ring housing 1 and inside the gearbox main shaft 3; and a sealing module 5, which is located at the top of the slip ring housing 1, around the outer periphery of the oil-proof component 4, and inside the flange 11.

[0019] In this embodiment, the oil-proof component 4 and the sealing module 5 constitute the oil-sealing structure for wind turbine slip rings involved in this application.

[0020] It should be noted that the housing 1 is a cylindrical metal structure, and the flange 11 is an annular cast steel part. The connection between the housing 1 and the spindle 3 is achieved through the flange 11. The oil-proof component 4 seals the wire harness channel, and the sealing module 5 provides dynamic and static sealing for the circumferential gap to prevent oil from entering the interior of the housing 1.

[0021] In addition, in this embodiment, when the user first installs the device, he tightens the locking nut 42. The locking nut 42 compresses the oil-proof connector 41 to produce radial contraction, so that each channel tightly hugs the outer sheath of the wire harness 43 to form a tight seal, preventing internal oil from flowing into the slip ring housing 1 from the oil-proof connector 41.

[0022] Specifically, the connection component 2 includes: a plug 21 disposed on both sides of the bottom of the slip ring housing 1; and a cable 22 disposed on both sides inside the slip ring housing 1, with the bottom bolted to the top of the plug 21.

[0023] In this embodiment, the connector 21 is rectangular and the cable 22 is a multi-strand copper core wire. The connector 21 and the cable 22 are used to connect to the external circuit to ensure the electrical connection of the slip ring 522 and realize the stable transmission of signals and power.

[0024] Specifically, the oil-proof component 4 includes: an oil-proof connector 41, which is disposed on the top of the slip ring housing 1 and located inside the gearbox main shaft 3; a locking nut 42, which is threadedly connected to the top of the oil-proof connector 41; a wire harness 43, which is disposed inside the gearbox main shaft 3, passes through the locking nut 42, and is welded to the cable 22 at its bottom; and a third sealing ring 44, which is disposed at the connection between the top of the slip ring housing 1 and the oil-proof connector 41.

[0025] In a preferred embodiment, the oil-proof connector 41 is cylindrical, the locking nut 42 is round, the wire harness 43 is multi-strand copper core wire, and the third sealing ring 44 is made of rubber. By tightening the locking nut 42, the oil-proof connector 41 is compressed to produce radial contraction, so that the outer sheath of the wire harness 43 is tightly wrapped, preventing oil from flowing from the oil-proof connector 41 into the slip ring housing 1, effectively preventing oil leakage. Example 2

[0026] Based on Example 1, when the device is rotating, a small amount of oil will inevitably seep in from the outside of the oil-proof joint 41. After the oil seeps in, it will enter the oil storage tank 513 opened around the inside of the static ring groove 511. Due to centrifugal force, it will enter the oil collection tank 514 through the communication channel between the oil collection tank 514 and the oil storage tank 513 inside the flange 11 and be temporarily stored. When maintenance is required, the user can open the sealing cover 515 and clean the oil inside the oil collection tank 514.

[0027] Specifically, the sealing module 5 includes: a static sealing component 51, which is disposed on the outer periphery of the connection between the oil-proof joint 41 and the slip ring housing 1, and located inside the flange 11; and a dynamic sealing component 52, which is disposed on the outer periphery of the connection between the oil-proof joint 41 and the slip ring housing 1, and located inside the flange 11, and located at the bottom of the static sealing component 51.

[0028] With this configuration, the static sealing component 51 and the dynamic sealing component 52 work together to prevent oil from seeping into the slip ring housing 1 from the outside of the oil-proof joint 41. The dual-seal design ensures sealing performance under both dynamic and static conditions.

[0029] Specifically, the static sealing assembly 51 includes: a static annular groove 511, disposed on the outer periphery of the oil-proof joint 41 and located inside the flange 11, with a groove formed on its outer periphery; a first sealing ring 512, disposed in the groove at the connection between the static annular groove 511 and the flange 11; an oil reservoir 513, formed around the inside of the static annular groove 511; an oil collection groove 514, formed inside the flange 11 and communicating with the oil reservoir 513 at one point; and a sealing cover 515, bolted to the outer side of the flange 11 near the oil collection groove 514, with a sealing strip on its outer periphery.

[0030] Among them, the static annular groove 511 is circular, the first sealing ring 512 is made of rubber, the oil storage tank 513 is an annular groove, the oil collection tank 514 is a rectangular groove, and the sealing cover 515 is made of metal. When a small amount of oil seeps in, the oil will flow into the oil storage tank 513 and enter the oil collection tank 514 for temporary storage through centrifugal force. During maintenance, the sealing cover 515 is opened to clean the oil in the oil collection tank 514, effectively preventing the seal failure caused by oil accumulation.

[0031] Specifically, the dynamic sealing assembly 52 includes: a sealing sleeve 521, which is rotatably disposed on the top of the slip ring housing 1 and located inside the flange 11 and at the bottom of the static ring groove 511, with a groove on its outer periphery; a slip ring 522, which is disposed on the top of the sealing sleeve 521 and is engaged in the bottom groove of the static ring groove 511; and a second sealing ring 523, which is disposed in the groove at the connection between the sealing sleeve 521 and the flange 11.

[0032] In this embodiment, the sealing sleeve 521 is cylindrical, the slip ring 522 is cylindrical, and the second sealing ring 523 is made of rubber and has wear resistance. The sealing sleeve 521 and the slip ring 522 cooperate to prevent oil from seeping into the slip ring housing 1 from the dynamic part, thereby ensuring the sealing of the device during rotation.

[0033] In actual use, the user first tightens the locking nut 42 during installation. The locking nut 42 compresses the oil-proof connector 41, causing radial contraction, which tightly grips the outer sheath of the wire harness 43 in each channel, forming a tight seal to prevent internal oil from flowing into the slip ring housing 1 from the oil-proof connector 41. When the device rotates, a small amount of oil inevitably seeps in from the outside of the oil-proof connector 41. After seeping in, the oil enters the oil storage tank 513, which is opened around the inside of the static ring groove 511. Due to centrifugal force, the oil enters the oil collection tank 514 through the communication channel between the oil collection tank 514 inside the flange 11 and the oil storage tank 513, and is temporarily stored in the oil collection tank 514. When maintenance is needed, the user opens the sealing cover 515 to clean the oil inside the oil collection tank 514.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for wind turbine slip rings, characterized in that: Includes slip ring housing (1) and top bolted flange (11); Two sets of connecting components (2) are provided and are located at the bottom of the slip ring housing (1); The gearbox main shaft (3) is bolted to the top of the flange (11); An oil-proof component (4) is provided on top of the slip ring housing (1) and located inside the gearbox main shaft (3); The sealing module (5) is located on the top of the slip ring housing (1), on the outer periphery of the oil-proof assembly (4), and inside the flange (11); The sealing module (5) includes; The static sealing assembly (51) is located on the outer periphery of the connection between the oil-proof joint (41) and the slip ring housing (1), and is located inside the flange (11); The dynamic sealing assembly (52) is located on the outer periphery of the connection between the oil-proof joint (41) and the slip ring housing (1), inside the flange (11), and at the bottom of the static sealing assembly (51); The static sealing assembly (51) includes; A static annular groove (511) is provided on the outer periphery of the oil-proof joint (41) and located inside the flange (11), with a slot on the outer periphery; The first sealing ring (512) is set in the groove at the connection between the static annular groove (511) and the flange (11); An oil storage tank (513) is formed around the inside of a static annular groove (511); An oil collection tank (514) is located inside the flange (11) and is connected to the oil storage tank (513) at one point; The sealing cap (515) is bolted to the outer side of the flange (11) near the oil collection tank (514) and has a sealing strip on its outer periphery.

2. The sealing structure for wind turbine slip rings according to claim 1, characterized in that: The connecting assembly (2) includes: a plug (21) disposed on both sides of the bottom of the slip ring housing (1); Cable (22) is located on both sides inside the slip ring housing (1) and is bolted to the top of the connector (21).

3. The sealing structure for wind turbine slip rings according to claim 1, characterized in that: The oil-proof component (4) includes: an oil-proof connector (41), which is disposed on the top of the slip ring housing (1) and located inside the gearbox main shaft (3); Locking nut (42) is threaded onto the top of oil-proof connector (41); The wiring harness (43) is located inside the gearbox main shaft (3), passes through the locking nut (42), and is welded to the cable (22) at the bottom; The third sealing ring (44) is located at the connection between the top of the slip ring housing (1) and the oil-proof connector (41).

4. The sealing structure for wind turbine slip rings according to claim 3, characterized in that: The oil-proof connector (41) and the top of the slip ring housing (1) are respectively provided with grooves for snapping the third sealing ring (44).

5. The sealing structure for wind turbine slip rings according to claim 1, characterized in that: The dynamic sealing assembly (52) includes: a sealing sleeve (521), which is rotatably disposed on the top of the slip ring housing (1) and located inside the flange (11) and at the bottom of the static ring groove (511), and has a slot on its outer periphery; The slip ring (522) is set on the top of the sealing sleeve (521) and is snapped into the bottom groove of the static ring groove (511); The second sealing ring (523) is set in the groove at the connection between the sealing sleeve (521) and the flange (11).

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