Gear box lubricating structure and wind power gear box

Abstract

The utility model belongs to the technical field of wind power equipment, and discloses a gearbox lubricating structure and a wind power gearbox. The gearbox lubricating structure is used for lubricating a bearing pack of a planetary gear train, the gearbox lubricating structure comprises an oil inlet way, a lubricating oil way and an auxiliary oil way, the oil inlet way is formed in a first planet carrier of the planetary gear train, and the oil inlet way communicates with an external oil supply device and is used for supplying lubricating oil; the lubricating oil way is formed in a pin shaft of the planetary gear train and communicates with the oil inlet way. The lubricating oil way communicates with the periphery of the bearing pack so as to supply oil to the bearing pack. The auxiliary oil way is communicated with an upwind bearing of the bearing pack and used for supplying oil to the upwind bearing. According to the gearbox lubricating structure, auxiliary oil supply to the upwind bearing can be achieved, the lubricating effect on the bearing pack of the planetary gear train is improved, the failure risk of the bearing pack is reduced, and the reliability of the gearbox is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, and in particular to a gearbox lubrication structure 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. Among the various lubrication systems within the gearbox, the lubrication of the bearings of the planetary gears, which constitute the largest number of components inside the gearbox, is particularly critical. Failure of any single planetary gear bearing will necessitate the removal of the entire gearbox for maintenance, severely impacting its overall reliability. Therefore, ensuring effective lubrication of the planetary gear bearings is imperative.

[0003] In existing technology, the lubrication structure of planetary gear bearings involves oil entering at the middle position of paired bearings located on the same pin shaft, and then lubricating the upwind and downwind bearings of the planetary gears separately. However, due to the gradual increase in the inclination angle of the wind turbine's transmission chain, i.e., the gearbox is installed at a certain angle, the lubricating oil will, due to gravity, occupy a larger proportion of the lubricating oil in the downwind bearing of the planetary gears, while the upwind bearing will fail prematurely due to insufficient lubrication over a long period.

[0004] Therefore, there is an urgent need for a gearbox lubrication structure 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 gearbox lubrication structure that can provide auxiliary oil supply to the upwind bearing, improve the lubrication effect on the bearing assembly of the planetary gear system, reduce the risk of bearing assembly failure, and enhance the reliability of the gearbox.

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

[0007] A gearbox lubrication structure for lubricating the bearing assembly of a planetary gear train, the gearbox lubrication structure comprising:

[0008] The oil inlet passage is located on the first planet carrier of the planetary gear train and is connected to an external oil supply device for supplying lubricating oil.

[0009] The lubricating oil passage is located on the pin shaft of the planetary gear train and is connected to the oil inlet passage; the lubricating oil passage is connected to the outer periphery of the bearing assembly for supplying oil to the bearing assembly.

[0010] An auxiliary oil circuit is connected to the upwind bearing of the bearing assembly to supply oil to the upwind bearing.

[0011] Optionally, the two ports of the auxiliary oil circuit are respectively connected to the external oil supply device and the upwind bearing.

[0012] Optionally, the aforementioned auxiliary oil circuit is provided in the second planetary carrier or housing of the aforementioned planetary gear train to connect the aforementioned external oil supply device and the aforementioned upwind bearing.

[0013] Optionally, the two ports of the auxiliary oil circuit are respectively connected to the lubrication oil circuit and the upwind bearing.

[0014] Optionally, the above-mentioned lubrication circuit includes:

[0015] The main oil circuit is connected to the inlet oil circuit.

[0016] The first oil outlet passage has two ports that are respectively connected to the main oil passage and the outer periphery of the bearing assembly, for supplying oil to the bearing assembly.

[0017] The second oil outlet circuit has two ports that are respectively connected to the main oil circuit and the auxiliary oil circuit, for supplying oil to the auxiliary oil circuit.

[0018] Optionally, the above-mentioned auxiliary oil circuit includes:

[0019] The first connecting oil passage is provided on the second planet carrier of the planetary gear train and connected to the second oil outlet passage;

[0020] The second connecting oil passage is disposed on the end face of the second planetary carrier facing the windward bearing, and the second connecting oil passage is connected to the first connecting oil passage.

[0021] Optionally, the above-mentioned lubrication circuit further includes a third connecting oil circuit, the two ports of which are respectively connected to the above-mentioned oil inlet circuit and the above-mentioned main oil circuit.

[0022] Optionally, the bearing assembly includes two bearings, with a spacer ring positioned between the two bearings, and the lubrication circuit is connected to the spacer ring.

[0023] Optionally, the auxiliary oil circuit is connected to the outer periphery of the upwind bearing or the end face of the upwind bearing near the upwind direction.

[0024] Another objective of this utility model is to provide a wind turbine gearbox, including the gearbox lubrication structure described in any of the above embodiments, which can provide auxiliary oil supply to the upwind bearing, improve the lubrication effect on the bearing assembly of the planetary gear system, reduce the risk of bearing assembly failure, and enhance the reliability of the gearbox.

[0025] The beneficial effects of this utility model are:

[0026] This utility model provides a gearbox lubrication structure and a wind turbine gearbox. The lubricating oil in this gearbox lubrication structure can not only be supplied to the bearing assembly through the oil inlet and lubrication channels, but also an auxiliary oil channel is added and directly connected to the windward bearing. This increases the amount of lubricating oil at the windward bearing, ensuring its lubrication and preventing insufficient lubrication at the windward bearing due to the gearbox's tilted installation. This improves the lubrication effect on the planetary gear train's bearing assembly, reduces the risk of bearing assembly failure, and enhances the gearbox's reliability. Attached Figure Description

[0027] Figure 1 This is an isometric view of the gearbox lubrication structure provided in Embodiment 1 of this utility model;

[0028] Figure 2 This is an isometric view of the gearbox lubrication structure provided in Embodiment 2 of this utility model.

[0029] In the picture:

[0030] 1. First planetary carrier; 2. Pin; 3. Second planetary carrier; 4. Housing; 501. Upper wind bearing; 502. Lower wind bearing; 6. Planetary gears;

[0031] 10. Oil inlet circuit;

[0032] 20. Lubricating oil circuit; 21. Main oil circuit; 22. First oil outlet circuit; 23. Second oil outlet circuit; 24. Third connecting oil circuit;

[0033] 30. Auxiliary oil circuit; 31. First connecting oil circuit; 32. Second connecting oil circuit. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The following reference Figure 1 and Figure 2 This invention introduces the gearbox lubrication structure and wind turbine gearbox provided by this utility model.

[0039] Example 1

[0040] This embodiment provides a gearbox lubrication structure for lubricating the bearing assembly of a planetary gear train.

[0041] Please refer to Figure 1 It should be noted that the planetary gear train includes a housing 4, a first planetary carrier 1, a pin 2, a second planetary carrier 3, a bearing assembly, and planetary gears 6. The planetary gears 6 are connected to the first planetary carrier 1 and the second planetary carrier 3 via the pin 2, and a bearing assembly is provided between the planetary gears 6 and the pin 2. The bearing assembly includes several bearings.

[0042] Optionally, the bearings mentioned above can be rolling bearings or sliding bearings, both of which can provide support for the pin 2.

[0043] Optionally, the number of bearings in the bearing assembly can be set to at least two according to actual needs, and is not specifically limited here. In this embodiment, the bearing assembly includes two bearings, specifically an upwind bearing 501 and a downwind bearing 502.

[0044] Please continue to refer to Figure 1 Specifically, the gearbox lubrication structure includes an oil inlet passage 10, a lubrication passage 20, and an auxiliary oil passage 30. The oil inlet passage 10 is located on the first planet carrier 1 of the planetary gear train and is connected to an external oil supply device for supplying lubricating oil. The lubrication passage 20 is located on the pin 2 of the planetary gear train and is connected to the oil inlet passage 10. The lubrication passage 20 is connected to the outer periphery of the bearing assembly for supplying oil to the bearing assembly. The auxiliary oil passage 30 is connected to the upwind bearing 501 of the bearing assembly for supplying oil to the upwind bearing 501.

[0045] In this embodiment, the lubricating oil in the gearbox lubrication structure can not only be supplied to the bearing assembly through the oil inlet passage 10 and the lubrication passage 20, but also an auxiliary oil passage 30 is added. The auxiliary oil passage 30 is directly connected to the windward bearing 501, which increases the amount of lubricating oil at the windward bearing 501, meets the lubrication requirements of the windward bearing 501, avoids the problem of insufficient lubrication at the windward bearing 501 due to the gearbox being installed at an angle, improves the lubrication effect on the planetary gear train bearing assembly, reduces the risk of bearing assembly failure, and improves the reliability of the gearbox.

[0046] In this embodiment, the two ports of the auxiliary oil circuit 30 are respectively connected to the lubrication oil circuit 20 and the upwind bearing 501. That is, the lubricating oil of the auxiliary oil circuit 30 is obtained from the lubrication oil circuit 20 and supplied to the upwind bearing 501 for lubrication. This arrangement eliminates the need for other oil circuits, does not occupy too much space, is easy to process, and has low cost.

[0047] Optionally, the auxiliary oil passage 30 can be connected to the outer periphery of the upwind bearing 501 or to the end face of the upwind bearing 501 near the upwind direction, both of which can achieve lubrication of the upwind bearing 501 by the auxiliary oil passage 30. Preferably, the auxiliary oil passage 30 is connected to the end face of the upwind bearing 501 near the upwind direction, so that oil can enter from the upwind direction of the bearing and flow to the downwind side for lubrication under the action of gravity, thereby achieving full lubrication of the bearing.

[0048] Correspondingly, the connection between the lubrication oil passage 20 and the outer periphery of the bearing assembly can also be provided between adjacent bearings to provide comprehensive lubrication for the downwind bearing 502.

[0049] Specifically, the lubrication circuit 20 includes a main oil circuit 21, a first oil outlet circuit 22, and a second oil outlet circuit 23. The main oil circuit 21 is connected to the inlet oil circuit 10. The two ports of the first oil outlet circuit 22 are respectively connected to the main oil circuit 21 and the outer periphery of the bearing assembly for supplying oil to the bearing assembly. The two ports of the second oil outlet circuit 23 are respectively connected to the main oil circuit 21 and the auxiliary oil circuit 30 for supplying oil to the auxiliary oil circuit 30. Lubricating oil is obtained from the inlet oil circuit 10 through the main oil circuit 21 and flows into the outer periphery of the bearing assembly and the upwind bearing 501 of the bearing assembly through the first oil outlet circuit 22 and the second oil outlet circuit 23, respectively, to achieve oil supply to two positions of the bearing assembly, thereby improving the lubrication effect of each bearing in the bearing assembly.

[0050] Optionally, the bearing assembly includes two bearings, with a spacer ring between the two bearings. The lubricating oil passage 20 is connected to the spacer ring, specifically the first oil outlet passage 22 is connected to the spacer ring to introduce lubricating oil between the two bearings.

[0051] Optionally, when the bearing assembly includes multiple bearings, at least two first oil outlet passages 22 are provided at intervals, and each pair of adjacent bearings is connected by an oil outlet passage. This arrangement allows lubricating oil to flow into the upwind side of each bearing, and the lubricating oil can flow to the downwind side of the bearing by gravity, thereby achieving comprehensive lubrication of each bearing and improving the lubrication effect.

[0052] Specifically, the auxiliary oil circuit 30 includes a first connecting oil circuit 31 and a second connecting oil circuit 32. The first connecting oil circuit 31 is disposed on the second planetary carrier 3 of the planetary gear train and connected to the second oil outlet circuit 23. The second connecting oil circuit 32 is disposed on the end face of the second planetary carrier 3 facing the windward bearing 501, and the second connecting oil circuit 32 is connected to the first connecting oil circuit 31. This allows the auxiliary oil circuit 30 to flow into the windward bearing 501 through the second oil outlet circuit 23 of the lubricating oil circuit 20 and through the first connecting oil circuit 31 and the second connecting oil circuit 32.

[0053] Furthermore, the lubrication circuit 20 also includes a third connecting circuit 24, the two ports of which are connected to the oil inlet circuit 10 and the main circuit 21 respectively, thereby realizing the connection between the main circuit 21 and the oil inlet circuit 10.

[0054] Optionally, the auxiliary oil passage 30 can be formed by machining holes or by connecting steel pipes; either method can achieve the forming of the auxiliary oil passage 30, and no specific limitation is made here.

[0055] This embodiment also provides a wind turbine gearbox, which includes the gearbox lubrication structure described in any of the above embodiments. By using the above gearbox lubrication structure, when the wind turbine gearbox is placed at an angle, both the upwind bearing 501 and the downwind bearing 502 in each planetary gear train can receive better lubrication, thereby improving the service life and operational reliability of the wind turbine gearbox.

[0056] Example 2

[0057] This embodiment provides a gearbox lubrication structure and a wind turbine gearbox. The difference between this embodiment and Embodiment 1 is the different configuration of the auxiliary oil circuit 30.

[0058] Please refer to Figure 2 Specifically, the two ports of the auxiliary oil circuit 30 are connected to the external oil supply device and the upwind bearing 501, respectively, so that the auxiliary oil circuit 30 directly obtains lubricating oil from the external oil supply device and supplies it to the upwind bearing 501. It is not connected to the lubricating oil circuit 20. This setting does not require sharing the same lubricating oil inlet circuit 10 with other oil circuits, ensuring the supply of lubricating oil to the upwind bearing 501, and there is no need to worry about insufficient lubricating oil in the upwind bearing 501.

[0059] Specifically, the auxiliary oil circuit 30 is installed in the second planetary carrier 3 or housing 4 of the planetary gear train to connect the external oil supply device and the upwind bearing 501, thereby enabling the auxiliary oil circuit 30 to supply lubricating oil to the upwind bearing 501.

[0060] 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 gearbox lubrication structure, characterized in that, For lubrication of bearing assemblies in planetary gear trains, the gearbox lubrication structure includes: Oil inlet passage (10), the oil inlet passage (10) is opened in the first planet carrier (1) of the planetary gear train, and the oil inlet passage (10) is connected to an external oil supply device for supplying lubricating oil; A lubrication passage (20) is provided at the pin (2) of the planetary gear train and is connected to the oil inlet passage (10); the lubrication passage (20) is connected to the outer periphery of the bearing assembly for supplying oil to the bearing assembly. An auxiliary oil passage (30) is connected to the upwind bearing (501) of the bearing assembly for supplying oil to the upwind bearing (501); The two ports of the auxiliary oil circuit (30) are respectively connected to the external oil supply device and the upwind bearing (501); The auxiliary oil circuit (30) is provided through the second planetary carrier (3) or housing (4) of the planetary gear system to connect the external oil supply device and the upwind bearing (501); Alternatively, the two ports of the auxiliary oil circuit (30) are respectively connected to the lubrication oil circuit (20) and the upwind bearing (501); The lubrication circuit (20) includes: Main oil passage (21), which is connected to the oil inlet passage (10); The first oil outlet passage (22) has two ports connected to the main oil passage (21) and the outer periphery of the bearing assembly, respectively, for supplying oil to the bearing assembly; The second oil outlet passage (23) has two ports connected to the main oil passage (21) and the auxiliary oil passage (30) respectively, for supplying oil to the auxiliary oil passage (30); The auxiliary oil circuit (30) includes: The first connecting oil passage (31) is provided on the second planet carrier (3) of the planetary gear system and connected to the second oil outlet passage (23); The second connecting oil passage (32) is located on the end face of the second planetary carrier (3) facing the windward bearing (501), and the second connecting oil passage (32) is connected to the first connecting oil passage (31).

2. The gearbox lubrication structure according to claim 1, characterized in that, The lubrication circuit (20) also includes a third connecting circuit (24), the two ports of which are respectively connected to the oil inlet circuit (10) and the main circuit (21).

3. The gearbox lubrication structure according to claim 1, characterized in that, The bearing assembly includes two bearings, and a spacer ring is provided between the two bearings. The lubrication oil passage (20) is connected to the spacer ring.

4. The gearbox lubrication structure according to any one of claims 1-3, characterized in that, The auxiliary oil circuit (30) is connected to the outer periphery of the upwind bearing (501) or the end face of the upwind bearing (501) near the upwind direction.

5. A wind turbine gearbox, characterized in that, Includes the gearbox lubrication structure as described in any one of claims 1-4.

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