Gear box lubricating structure and wind power gear box

Abstract

The invention 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] The present invention relates to the technical field of wind power equipment, and in particular to a gear box lubrication structure and a wind power gear box. Background Art

[0002] In wind power equipment, the gearbox plays an indispensable role as a key component of the wind turbine generator set, which plays a role in transmitting torque. The effective lubrication of the rotating body inside the gearbox is the guarantee of the use effect and service life of the gearbox. Among the lubrication of various structures of the gearbox, the lubrication of the bearings of the planetary gears, which are used most in the gearbox, is more important. The failure of any planetary gear bearing will cause the entire gearbox to be taken off the shelf for maintenance, which seriously affects the overall reliability of the gearbox. Therefore, effective lubrication of the planetary gear bearings must be ensured.

[0003] In the prior art, the lubrication structure of the planetary gear bearing is to enter the middle position of the paired bearing on the same pin shaft, and then lubricate the upwind bearing and downwind bearing of the planetary gear in the paired bearing respectively. However, due to the gradual increase in the inclination angle of the transmission chain of the wind turbine, that is, the installation of the gearbox has a certain inclination angle. At this time, the lubricating oil will cause the downwind bearing of the planetary gear to occupy a larger proportion of the lubricating oil due to the effect of gravity, and at the same time, the upwind bearing of the planetary gear will fail prematurely due to the long-term inability to obtain sufficient lubricating oil.

[0004] Therefore, there is an urgent need for a gearbox lubrication structure and a wind power gearbox to solve the above technical problems. Summary of the invention

[0005] One object of the present invention is to provide a gearbox lubrication structure that can achieve auxiliary oil supply to the upwind bearing, thereby improving the lubrication effect on the bearing group of the planetary gear train, reducing the risk of bearing group failure, and improving the reliability of the gearbox.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The gearbox lubrication structure is used for lubrication of the bearing group of the planetary gear train. The gearbox lubrication structure includes:

[0008] An oil inlet passage, the oil inlet passage is opened in the first planet carrier of the planetary gear train, and the oil inlet passage is connected to an external oil supply device for supplying lubricating oil;

[0009] A lubricating oil circuit, the lubricating oil circuit being opened on the pin of the planetary gear train, the lubricating oil circuit being connected to the oil inlet circuit; the lubricating oil circuit being connected to the outer periphery of the bearing group to supply oil to the bearing group;

[0010] An auxiliary oil circuit, wherein the auxiliary oil circuit is connected to the upwind bearing of the bearing group so as 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 auxiliary oil circuit is connected through the second planet carrier or the housing of the planetary gear train to connect the external oil supply device and the upwind bearing.

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

[0014] Optionally, the lubricating oil circuit includes:

[0015] A main oil circuit, the main oil circuit being connected to the oil inlet circuit;

[0016] A first oil outlet passage, wherein two ports of the first oil outlet passage are respectively connected to the main oil passage and the outer periphery of the bearing group, so as to supply oil to the bearing group;

[0017] A second oil outlet passage, wherein two ports of the second oil outlet passage are respectively connected to the main oil passage and the auxiliary oil passage, so as to supply oil to the auxiliary oil passage.

[0018] Optionally, the auxiliary oil circuit includes:

[0019] a first communicating oil passage, the first communicating oil passage being disposed on the second planetary carrier of the planetary gear train and communicating with the second oil outlet passage;

[0020] The second communicating oil passage is provided on the end surface of the second planetary carrier facing the upwind bearing, and the second communicating oil passage is connected to the first communicating oil passage.

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

[0022] Optionally, the bearing group includes two bearings, a distance ring is arranged between the two bearings, and the lubricating oil path is connected to the distance ring.

[0023] Optionally, the auxiliary oil passage is connected to the outer periphery of the upwind bearing or the end surface of the upwind bearing close to the upwind direction.

[0024] Another object of the present invention is to provide a wind turbine gearbox, including a gearbox lubrication structure as described in any of the above schemes, which can realize auxiliary oil supply to the upwind bearing, improve the lubrication effect of the bearing group of the planetary gear train, reduce the risk of bearing group failure, and improve the reliability of the gearbox.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a gearbox lubrication structure and a wind power gearbox, the lubricating oil of the gearbox lubrication structure can not only be connected to the outer periphery of the bearing group through the oil inlet oil circuit and the lubricating oil circuit to supply lubricating oil to the bearing group, but also an auxiliary oil circuit is added, and the auxiliary oil circuit is directly connected to the upwind bearing, so that the amount of lubricating oil at the upwind bearing is increased to meet the lubrication of the upwind bearing, avoid the problem of insufficient lubricating oil at the upwind bearing due to the tilted installation of the gearbox, improve the lubrication effect on the bearing group of the planetary gear system, reduce the risk of failure of the bearing group, and improve the reliability of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an axonometric diagram of a gearbox lubrication structure provided in Embodiment 1 of the present invention;

[0028] Figure 2 It is an axonometric diagram of the gear box lubrication structure provided in the second embodiment of the present invention.

[0029] In the figure:

[0030] 1. First planet carrier; 2. Pin shaft; 3. Second planet carrier; 4. Box body; 501. Upwind bearing; 502. Downwind bearing; 6. Planetary gear;

[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 DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] Refer to the following Figure 1 and Figure 2 The invention introduces a gearbox lubrication structure and a wind power gearbox.

[0039] Embodiment 1

[0040] This embodiment provides a gearbox lubrication structure, which is used for lubricating a bearing group 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 group and a planetary gear 6. The planetary gear 6 is connected to the first planetary carrier 1 and the second planetary carrier 3 through the pin 2, and a bearing group is provided between the planetary gear 6 and the pin 2. The bearing group includes a plurality of bearings.

[0042] Optionally, the bearings may be rolling bearings or sliding bearings, both of which can support the pin 2.

[0043] Optionally, the number of bearings in the bearing group can be set to at least two according to actual needs, which is not specifically limited here. In this embodiment, the bearing group includes two bearings, which are specifically divided into 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 circuit 10, a lubricating oil circuit 20 and an auxiliary oil circuit 30. The oil inlet circuit 10 is opened in the first planetary carrier 1 of the planetary gear system, and the oil inlet circuit 10 is connected to an external oil supply device for supplying lubricating oil; the lubricating oil circuit 20 is opened in the pin shaft 2 of the planetary gear system, and the lubricating oil circuit 20 is connected to the oil inlet circuit 10; the lubricating oil circuit 20 is connected to the outer periphery of the bearing group for supplying oil to the bearing group; the auxiliary oil circuit 30 is connected to the upwind bearing 501 of the bearing group for supplying oil to the upwind bearing 501.

[0045] The lubricating oil of the gearbox lubrication structure in this embodiment can not only be connected to the outer periphery of the bearing group through the oil inlet oil circuit 10 and the lubricating oil circuit 20 to supply lubricating oil to the bearing group, but also an auxiliary oil circuit 30 is added, and the auxiliary oil circuit 30 is directly connected to the upwind bearing 501, so that the amount of lubricating oil at the upwind bearing 501 is increased to meet the lubrication of the upwind bearing 501 and avoid the problem of insufficient lubricating oil at the upwind bearing 501 caused by the tilted installation of the gearbox, thereby improving the lubrication effect of the bearing group of the planetary gear train, reducing the risk of failure of the bearing group, and improving the reliability of the gearbox.

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

[0047] Optionally, the auxiliary oil circuit 30 is connected to the outer periphery of the upwind bearing 501 or the end surface of the upwind bearing 501 close to the upwind direction, and the auxiliary oil circuit 30 can lubricate the upwind bearing 501. Preferably, the auxiliary oil circuit 30 is connected to the end surface of the upwind bearing 501 close to the upwind direction, so that oil can enter from the upwind direction of the bearing and flow to the downwind side by gravity for lubrication, thereby achieving comprehensive lubrication of the bearing.

[0048] Correspondingly, the connection between the lubricating oil passage 20 and the outer periphery of the bearing group may also be provided between adjacent bearings to fully lubricate the downwind bearing 502 .

[0049] Specifically, the lubricating oil 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 oil inlet 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 group, so as to supply oil to the bearing group; 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, so as to supply oil to the auxiliary oil circuit 30. Lubricating oil is obtained from the oil inlet circuit 10 through the main oil circuit 21, and flows into the outer periphery of the bearing group and the upwind bearing 501 of the bearing group through the first oil outlet circuit 22 and the second oil outlet circuit 23, so as to realize oil supply to two positions of the bearing group, thereby improving the lubrication effect of each bearing in the bearing group.

[0050] Optionally, the bearing group includes two bearings, a distance ring is arranged between the two bearings, and the lubricating oil path 20 is connected to the distance ring, specifically the first oil outlet path 22 is connected to the distance ring, so as to introduce the lubricating oil between the two bearings.

[0051] Optionally, when the bearing group includes multiple bearings, at least two first oil outlet passages 22 are provided at intervals, and an oil outlet passage is connected between two adjacent bearings. 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 provided 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 provided on the end surface of the second planetary carrier 3 facing the upwind bearing 501, and the second connecting oil circuit 32 is connected to the first connecting oil circuit 31. This enables the auxiliary oil circuit 30 to flow into the upwind bearing 501 through the second oil outlet circuit 23 of the lubricating oil circuit 20 and flow through the first connecting oil circuit 31 and the second connecting oil circuit 32.

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

[0054] Optionally, the auxiliary oil circuit 30 is formed by machining holes or by connecting steel pipes, both of which can achieve the forming of the auxiliary oil circuit 30 and are not specifically limited herein.

[0055] This embodiment also provides a wind turbine gearbox, which includes the gearbox lubrication structure described in any of the above schemes. By using the above gearbox lubrication structure, when the wind turbine gearbox is placed tilted, both the upwind bearing 501 and the downwind bearing 502 in the bearing group of each planetary gear train can be well lubricated, thereby improving the service life and operational reliability of the wind turbine gearbox.

[0056] Embodiment 2

[0057] This embodiment provides a gearbox lubrication structure and a wind power gearbox. The difference between this embodiment and the first embodiment lies in the different arrangement of the auxiliary oil circuit 30 .

[0058] Please refer to Figure 2 Specifically, the two ports of the auxiliary oil circuit 30 are respectively connected to the external oil supply device and the upwind bearing 501, 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, and it is not connected to the lubricating oil circuit 20. This arrangement does not need to share the lubricating oil of the same oil inlet circuit 10 with other oil circuits, thereby ensuring the supply of lubricating oil to the upwind bearing 501, and there is no need to worry about the problem of insufficient lubricating oil in the upwind bearing 501.

[0059] Specifically, the auxiliary oil circuit 30 passes through the second planet carrier 3 or the housing 4 disposed in the planetary gear train to connect the external oil supply device and the upwind bearing 501 , thereby realizing the function of the auxiliary oil circuit 30 supplying lubricating oil to the upwind bearing 501 .

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Gearbox lubrication structure, characterized in that: For lubrication of the bearing group of the planetary gear train, the gearbox lubrication structure comprises: An oil inlet passage (10), the oil inlet passage (10) being opened in the first planetary carrier (1) of the planetary gear train, the oil inlet passage (10) being connected to an external oil supply device for supplying lubricating oil; a lubricating oil circuit (20), the lubricating oil circuit (20) being opened on the pin shaft (2) of the planetary gear train, the lubricating oil circuit (20) being connected to the oil inlet circuit (10); the lubricating oil circuit (20) being connected to the outer periphery of the bearing group so as to supply oil to the bearing group; An auxiliary oil circuit (30), the auxiliary oil circuit (30) being connected to the upwind bearing (501) of the bearing group, so as to supply oil to the upwind bearing (501).

2. The gearbox lubrication structure according to claim 1, characterized in that: The two ports of the auxiliary oil circuit (30) are respectively connected to the external oil supply device and the upwind bearing (501).

3. The gearbox lubrication structure according to claim 2, characterized in that: The auxiliary oil circuit (30) passes through the second planet carrier (3) or the housing (4) provided in the planetary gear train to connect the external oil supply device and the upwind bearing (501).

4. The gearbox lubrication structure according to claim 1, characterized in that: The two ports of the auxiliary oil circuit (30) are respectively connected to the lubricating oil circuit (20) and the upwind bearing (501).

5. The gearbox lubrication structure according to claim 4, characterized in that: The lubricating oil circuit (20) comprises: A main oil circuit (21), the main oil circuit (21) being connected to the oil inlet circuit (10); A first oil outlet passage (22), wherein two ports of the first oil outlet passage (22) are respectively connected to the main oil passage (21) and the outer periphery of the bearing group, so as to supply oil to the bearing group; A second oil outlet passage (23), wherein two ports of the second oil outlet passage (23) are respectively connected to the main oil passage (21) and the auxiliary oil passage (30) so as to supply oil to the auxiliary oil passage (30).

6. The gearbox lubrication structure according to claim 5, characterized in that: The auxiliary oil circuit (30) comprises: A first communicating oil passage (31), the first communicating oil passage (31) being arranged on the second planetary carrier (3) of the planetary gear train and being connected to the second oil outlet passage (23); A second communicating oil passage (32), wherein the second communicating oil passage (32) is arranged on an end surface of the second planetary carrier (3) facing the upwind bearing (501), and the second communicating oil passage (32) is connected to the first communicating oil passage (31).

7. The gearbox lubrication structure according to claim 5, characterized in that: The lubricating oil circuit (20) further comprises a third communicating oil circuit (24), two ports of the third communicating oil circuit (24) being respectively connected to the oil inlet circuit (10) and the main oil circuit (21).

8. The gearbox lubrication structure according to claim 1, characterized in that: The bearing group comprises two bearings, a distance ring is arranged between the two bearings, and the lubricating oil path (20) is connected to the distance ring.

9. The gearbox lubrication structure according to any one of claims 1 to 8, characterized in that: The auxiliary oil passage (30) is connected to the outer periphery of the upwind bearing (501) or the end surface of the upwind bearing (501) close to the upwind direction.

10. Wind power gearbox, characterized in that: The invention comprises a gearbox lubrication structure as claimed in any one of claims 1 to 9.

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