Lubricating device for gear box and wind power gear box

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By installing a lubrication device with oil pipes and oil injection holes inside the gearbox, the problem of insufficient lubrication is solved, achieving sufficient lubrication of the meshing positions of the planetary gears and the ring gear, extending the service life of the gearbox and reducing wear and noise.

CN223483400UActive Publication Date: 2025-10-28NANJING HIGH SPEED GEAR MFG

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Patent Information

Application Number: CN202520088765.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-01-15
Publication Date: 2025-10-28
Estimated Expiration: 2035-01-15

AI Technical Summary

Technical Problem

Insufficient lubrication in existing gearboxes leads to increased tooth surface wear, higher temperature, increased noise, and may even cause gear failure, especially under heavy load conditions.

Method used

Design an oil pipe lubrication device, in which an oil pipe is arranged along the circumference of the gear ring on the inner wall of the housing, and is provided with multiple oil spray holes for spraying lubricating oil onto the gear ring to achieve sufficient lubrication of the meshing position of the planetary gear and the gear ring.

Benefits of technology

It improves the lubrication effect at the meshing positions of the planetary gears and the ring gear, extends the service life of the internal planetary gear system, reduces wear and noise, and ensures the normal operation of the gearbox.

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Abstract

The utility model belongs to the technical field of wind power equipment, and discloses a lubricating device for a gear box and the wind power gear box. The oil pipe is arranged on the inner wall of the box body and extends in the circumferential direction of the gear ring, and the oil pipe is located on at least one side of the gear ring in the axial direction of the oil pipe, so that at least part of the oil pipe and the gear ring are oppositely arranged; one end of the oil pipe is opened to form an inlet which is hermetically communicated with the oil supply device; the oil pipe is provided with the multiple oil spraying holes, the multiple oil spraying holes are formed at intervals and used for spraying lubricating oil to the gear ring, so that lubrication of the meshing position of the planet gear and the gear ring is achieved, the number of the oil spraying holes can be designed according to actual requirements and is not affected by other factors, and the lubricating effect of the lubricating device on the meshing position of the planet gear and the gear ring is improved.

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Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, and in particular to a lubrication device for a gearbox and a wind power gearbox. Background Technology

[0002] In wind power equipment, the gearbox, which transmits torque, plays an indispensable and crucial role as a key component of the wind turbine generator. Effective lubrication of the rotating parts inside the gearbox is essential for its performance and lifespan.

[0003] Currently, the lubrication system for the planetary gears and ring gear meshing in gearboxes typically involves drilling holes in the front and rear housings where the ring gear contacts the gear and installing oil injectors. Due to limitations in oil passage location and drilling space, the number of oil injectors (i.e., lubrication points) generally does not exceed two. However, with the increasing loads on wind turbines and the rising lubrication demands, insufficient lubrication can lead to accelerated tooth surface wear, increased temperature, increased noise, and in severe cases, even gear failure.

[0004] Therefore, there is an urgent need for a lubrication device for gearboxes and a wind turbine gearbox to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a lubrication device for a gearbox that can improve the lubrication effect at the meshing point of the planetary gears and the ring gear, making the lubrication more thorough.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A lubrication device for a gearbox includes an oil pipe disposed on the inner wall of the gearbox and extending circumferentially along the gear ring. The oil pipe is located on at least one side of the gear ring along its own axial direction, such that at least a portion of the oil pipe and the gear ring are disposed opposite each other.

[0008] One end of the aforementioned oil pipe is opened to form an inlet, and the aforementioned inlet is sealed and connected to the oil supply device;

[0009] The oil pipe is provided with multiple oil injection holes, which are spaced apart and used to spray lubricating oil toward the gear ring.

[0010] Optionally, the oil pipe is located on one side of the gear ring along its own axial direction, and the oil injection hole is capable of spraying lubricating oil to the meshing position of the planetary gear and the gear ring.

[0011] Optionally, the inner wall of the aforementioned housing is provided with an annular mounting groove, and the aforementioned oil pipe is disposed within the aforementioned annular mounting groove.

[0012] Optionally, it also includes an adapter disposed at the inlet of the oil pipe, the adapter being configured to provide a sealed connection to the oil supply device.

[0013] Optionally, the aforementioned housing is provided with a main oil circuit and a connecting oil circuit, with both ends of the main oil circuit being sealed and connected to the oil supply device and the connecting oil circuit, respectively, and the aforementioned adapter being sealed and connected to the connecting oil circuit.

[0014] Optionally, the outer periphery of the connecting end of the adapter is provided with an external thread, and at least a portion of the wall of the oil passage is provided with an internal thread, wherein the external thread is threadedly connected to the internal thread.

[0015] Optionally, a sealing element is provided between the mounting part of the aforementioned connecting oil passage in the aforementioned housing and the aforementioned adapter.

[0016] Optionally, a connecting pipe is provided between the oil pipe and the adapter. One end of the connecting pipe passes through the housing and is sealed to the adapter, while the other end is sealed to the oil pipe. The adapter is sealed to the oil supply device.

[0017] Optionally, it also includes a plurality of pipe clamps, which are spaced apart and are used to fix the oil pipe to the inner wall of the housing.

[0018] Another objective of this utility model is to provide a wind turbine gearbox, which includes a housing, a gear ring, and a lubrication device for the gearbox as described in any of the above embodiments.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a lubrication device for a gearbox, which supplies lubricating oil to the gear ring by means of an oil pipe connected to an oil supply device. Specifically, the oil pipe is set on the inner wall of the gearbox and extends circumferentially along the gear ring. At least a portion of the oil pipe can be arranged opposite to the gear ring, and multiple oil spray holes are provided on the side of the oil pipe facing the gear ring. The lubricating oil entering the oil pipe can be sprayed onto the gear ring through the oil spray holes, thereby achieving lubrication of the meshing position of the planetary gears and the gear ring. The number of oil spray holes can be designed according to actual needs and is not affected by other factors, thus improving the lubrication effect of the lubrication device on the meshing position of the planetary gears and the gear ring. Attached Figure Description

[0021] Figure 1 This is an isometric view of a lubrication device for a gearbox provided in a specific embodiment of this utility model;

[0022] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0023] Figure 3This is a partial cross-sectional view of a lubrication device for a gearbox provided in a specific embodiment of this utility model;

[0024] Figure 4 yes Figure 3 A magnified view of a section at point B.

[0025] In the picture:

[0026] 10. Oil pipe; 101. Injector hole;

[0027] 20. Adapter; 30. Pipe clamp;

[0028] 100. Housing; 1001. Annular mounting groove; 1002. Main oil passage; 1003. Connecting oil passage;

[0029] 200. Gear ring. Detailed Implementation

[0030] 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.

[0031] 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 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.

[0032] 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.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," "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.

[0034] The following reference Figures 1 to 4 This invention introduces a lubrication device for gearboxes.

[0035] Please refer to Figure 1 and Figure 2 This embodiment provides a lubrication device for a gearbox, which includes an oil pipe 10. The oil pipe 10 is disposed on the inner wall of the gearbox 100 and extends circumferentially along the gear ring 200. The oil pipe 10 is located on at least one side of the gear ring 200 along its own axial direction, so that at least a portion of the oil pipe 10 can be disposed opposite to the gear ring 200. One end of the oil pipe 10 is open to form an inlet, and the inlet is sealed and connected to an oil supply device. The oil pipe 10 has a plurality of oil injection holes 101, which are spaced apart and used to spray lubricating oil toward the gear ring 200.

[0036] In this embodiment, the lubrication device for the gearbox supplies lubricating oil to the gear ring 200 by means of an oil pipe 10 connected to an oil supply device. Specifically, the oil pipe 10 is set on the inner wall of the housing 100 and extends circumferentially along the gear ring 200. At least a portion of the oil pipe 10 and the gear ring 200 are arranged opposite each other, and the side of the oil pipe 10 facing the gear ring 200 is provided with multiple oil spray holes 101. The lubricating oil entering the oil pipe 10 can be sprayed onto the gear ring 200 through the oil spray holes 101, thereby achieving lubrication of the meshing position of the planetary gears and the gear ring 200. The number of oil spray holes 101 can be designed according to actual needs and is not affected by other factors, thus improving the lubrication effect of the lubrication device on the meshing position of the planetary gears and the gear ring 200.

[0037] Specifically, the inner wall of the housing 100 is provided with an annular mounting groove 1001, and the oil pipe 10 is set in the annular mounting groove 1001. The annular mounting groove 1001 is used to accommodate and install the oil pipe 10, so as to avoid the oil pipe 10 from interfering with the operation of other structures.

[0038] Optionally, the oil pipe 10 is located on at least one side of the gear ring 200 along its own axial direction, that is, it can be provided on any side or both sides of the gear ring 200, which can satisfy the function of the oil pipe 10 to spray lubricating oil onto the gear ring 200.

[0039] Specifically, in this embodiment, the oil pipe 10 is located on one side of the gear ring 200 along its own axial direction, and the oil injection hole 101 can spray lubricating oil to the meshing position of the planetary gear and the gear ring 200, which not only simplifies the structure, but also ensures the lubrication effect.

[0040] It is understandable that the length and arrangement of the oil pipe 10 can be set according to actual needs to achieve at least a partial relative setting of the oil pipe 10 and the gear ring 200; its specific length can be, for example, a quarter turn, half turn, or a full turn, as long as it meets the required amount of lubricating oil, and no specific limitation is made here.

[0041] For example, in this embodiment, the length of the oil pipe 10 is less than half a turn, which not only improves the lubrication effect at the meshing position of the planetary gear and the gear ring 200, but also saves structural volume, cost and space.

[0042] In this embodiment, the lubrication device for the gearbox further includes an adapter 20, which is disposed at the inlet of the oil pipe 10 and configured to be in a sealed connection with the oil supply device. Through the switching action of the adapter 20, lubricating oil is supplied to the oil pipe 10.

[0043] In some optional embodiments, a connecting pipe is provided between the oil pipe 10 and the adapter 20. One end of the connecting pipe passes through the housing 100 and is sealed to the adapter 20, while the other end is sealed to the oil pipe 10. The adapter 20 is sealed to the oil supply device. That is, the adapter 20 is directly connected to the external oil supply device and communicates with the internal oil pipe 10 through the connecting pipe passing through the housing 100, thereby achieving the function of supplying oil to the oil pipe 10.

[0044] Please refer to Figure 3 and Figure 4 In some alternative embodiments, the housing 100 has a main oil passage 1002 and a connecting oil passage 1003. The two ends of the main oil passage 1002 are respectively sealed and connected to the oil supply device and the connecting oil passage 1003. The adapter 20 is sealed and connected to the connecting oil passage 1003. By connecting the adapter 20 and the connecting oil passage 1003, it is not necessary to directly connect to the external oil pipe 10; simply connecting to the main oil passage 1002 is sufficient to supply oil to the oil pipe 10.

[0045] Specifically, the outer circumference of the connecting end of the adapter 20 is provided with external threads, and at least a portion of the wall of the oil passage 1003 is provided with internal threads, with the external threads threaded into the internal threads. The bolted connection makes the connection between the oil passage 1003 and the adapter 20 more secure, improving the reliability of the lubricating oil supply circuit.

[0046] More specifically, the housing 100 has an installation part for connecting the oil passage 1003 and a sealing element is provided between it and the adapter 20. The sealing element ensures the sealing between the connecting oil passage 1003 and the adapter 20, thereby preventing oil leakage and other situations from occurring.

[0047] Please return to the reference. Figure 1 and Figure 2 Furthermore, the lubrication device for the gearbox also includes several pipe clamps 30, which are spaced apart. The pipe clamps 30 are used to fix the oil pipe 10 to the inner wall of the housing 100, thereby realizing the fixed connection between the oil pipe 10 and the inner wall of the housing 100.

[0048] Specifically, the pipe clamp 30 includes an arc-shaped limiting part and a fixing part provided on both sides of the opening of the limiting part. The limiting part can be fitted around the outer periphery of the oil pipe 10, and the fixing part is used to fix it to the inner wall of the housing 100, thereby fixing the oil pipe 10 to the inner wall of the housing 100.

[0049] This embodiment also provides a wind turbine gearbox, which includes a housing 100, a gear ring 200, and a lubrication device for the gearbox as described in any of the above embodiments. By employing the above-described lubrication device, the lubrication at the meshing positions of the planetary gears and the gear ring 200 can be improved, enabling the internal planetary gear system to operate for a longer period of time and increasing the service life of the wind turbine gearbox.

[0050] Specifically, the inner wall of the housing 100 is provided with a gear ring 200, which meshes with the planetary gears of the planetary gear system. By providing a lubrication device for the gearbox on at least one side of the gear ring 200, lubrication of the meshing position between the gear ring 200 and the planetary gears of the planetary gear system can be achieved.

[0051] 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 lubrication device for a gearbox, characterized in that, Includes an oil pipe (10), which is disposed on the inner wall of the housing (100) and extends circumferentially around the gear ring (200). The oil pipe (10) is located on at least one side of the gear ring (200) along its own axial direction, such that at least a portion of the oil pipe (10) and the gear ring (200) are arranged opposite each other. One end of the oil pipe (10) is opened to form an inlet, and the inlet is sealed and connected to the oil supply device; The oil pipe (10) has a plurality of oil injection holes (101), which are spaced apart and used to spray lubricating oil toward the gear ring (200).

2. The lubrication device for a gearbox according to claim 1, characterized in that, The oil pipe (10) is located on one side of the gear ring (200) along its own axial direction, and the oil injection hole (101) can spray lubricating oil to the meshing position of the planetary gear and the gear ring (200).

3. The lubrication device for a gearbox according to claim 1, characterized in that, The inner wall of the housing (100) is provided with an annular mounting groove (1001), and the oil pipe (10) is disposed in the annular mounting groove (1001).

4. The lubrication device for a gearbox according to any one of claims 1-3, characterized in that, It also includes an adapter (20) disposed at the inlet of the oil pipe (10) and configured to be able to seal the connection to the oil supply device.

5. The lubrication device for a gearbox according to claim 4, characterized in that, The housing (100) has a main oil passage (1002) and a connecting oil passage (1003). The two ends of the main oil passage (1002) are respectively sealed and connected to the oil supply device and the connecting oil passage (1003). The adapter (20) is sealed and connected to the connecting oil passage (1003).

6. The lubrication device for a gearbox according to claim 5, characterized in that, The outer periphery of the connecting end of the adapter (20) is provided with an external thread, and at least a portion of the wall of the connecting oil passage (1003) is provided with an internal thread, and the external thread is threadedly connected to the internal thread.

7. The lubrication device for a gearbox according to claim 6, characterized in that, The housing (100) has an installation part for the connecting oil passage (1003), and a sealing element is provided between the housing (100) and the adapter (20).

8. The lubrication device for a gearbox according to claim 4, characterized in that, A connecting pipe is provided between the oil pipe (10) and the adapter (20). One end of the connecting pipe passes through the housing (100) and is sealed to the adapter (20), while the other end is sealed to the oil pipe (10). The adapter (20) is sealed to the oil supply device.

9. The lubrication device for a gearbox according to any one of claims 1-3, characterized in that, It also includes a number of pipe clamps (30), which are spaced apart and are used to fix the oil pipe (10) to the inner wall of the housing (100).

10. A wind turbine gearbox, characterized in that, It includes a housing (100), a gear ring (200), and a lubrication device for a gearbox as described in any one of claims 1-9.