Built-in lubricating mechanism of wind power gear box

Abstract

The utility model discloses a built-in lubricating mechanism of a wind power gear box, which belongs to the technical field of gear boxes and comprises a box body, and two groups of planetary gears are arranged in the box body and are respectively limited and mounted by a first planetary carrier and a second planetary carrier; the first planet carrier is divided into two end faces which are fixedly connected through a first connecting rod, a first oil conveying pipe is arranged in the first connecting rod, and a first nozzle and a second nozzle are arranged on the first oil conveying pipe. The second planet carrier is divided into two end faces which are fixedly connected through a second connecting rod, a second oil conveying pipe is arranged in the second connecting rod, and a third nozzle and a fourth nozzle are arranged on the second oil conveying pipe. By means of the planet carrier built-in oil way and the active pumping and spraying system, the lubrication problem of the wind power gear box under the high-speed and inclined working conditions is thoroughly solved, reliability is remarkably improved, and operation and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a built-in lubrication mechanism for a wind turbine gearbox. Background Technology

[0002] Planetary gear units are widely used in wind power speed-increasing gearboxes due to their power splitting and compact structure. How to lubricate and cool the meshing gear pairs such as the internal gear ring-planet gears and planet gears-sun gears in the planetary gear unit directly affects the service life of the gearbox.

[0003] In planetary gear systems, the internal ring gear, planet gears, sun gear, and planet gear bearings employ an oil bath splash lubrication method. This involves immersing the planetary gear system in an oil bath within the gearbox housing, relying on the lubricating oil carried up by the gears during operation for lubrication and cooling. This lubrication and cooling method is closely related to the planet gear bearing structure, the gearbox mounting tilt, the planet carrier's rotational speed, the residence time of the gears and planet gear bearings in the oil bath, and the viscosity of the lubricating oil. Furthermore, when the planet gears rotate above the oil surface in the gearbox oil bath, the gears and planet gear bearings can only rely on the residual lubricating oil for lubrication. Therefore, this lubrication and cooling method is ineffective and can negatively impact the meshing gear pairs and planet gear bearings in wind turbine speed-increasing gearboxes. Utility Model Content

[0004] The purpose of this utility model is to solve the problems in the prior art by proposing a built-in lubrication mechanism for wind turbine gearboxes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wind turbine gearbox with an internal lubrication mechanism includes a housing. Two sets of planetary gears are housed within the housing, respectively secured by a first planetary carrier and a second planetary carrier. The first planetary carrier contains a first sun gear and a first planetary gear that mesh with each other. The second planetary carrier contains a second sun gear and a second planetary gear that mesh with each other. The first planetary carrier has two end faces, fixedly connected by a first connecting rod. A first oil supply pipe is located within the first connecting rod, and a first nozzle and a second nozzle are mounted on the first oil supply pipe. The second planetary carrier has two end faces, fixedly connected by a second connecting rod. A second oil supply pipe is located within the second connecting rod, and a third nozzle and a fourth nozzle are mounted on the second oil supply pipe.

[0007] Preferably, one end of the housing is provided with an outer ring bearing, and the other end of the housing is provided with a fixed-axis large gear and a small gear that mesh with each other, and the small gear is provided with an input rod extending to the outer end.

[0008] Preferably, the fixed-axis large gear is provided with a drive shaft, and the drive shaft is connected to the first sun gear.

[0009] Preferably, the housing is provided with a connector for fixing the first planetary carrier and the second planetary carrier, and the first planetary carrier and the second planetary carrier are respectively provided with a first internal gear ring and a second internal gear ring.

[0010] Preferably, the first planetary carrier is provided with an annular first oil extraction pipe, the bottom of the first oil extraction pipe is connected to a first oil extraction port, and the top of the first oil extraction pipe is connected to a first oil delivery pipe.

[0011] Preferably, the second planetary carrier is provided with an annular second oil extraction pipe, the bottom of the second oil extraction pipe is connected to a second oil extraction port, and the top of the second oil extraction pipe is connected to a second oil delivery pipe.

[0012] Preferably, a suction pump is provided in both the first and second oil inlets, two first nozzles are symmetrically arranged next to each second nozzle, and two third nozzles are symmetrically arranged next to each fourth nozzle.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. By directly covering the meshing points of the internal gear ring-planet gear, planet gear-sun gear, and bearings with four types of nozzles, the maximum lubrication effect can be achieved regardless of oil level and gearbox tilt.

[0015] 2. The lubricating oil is recycled by using an oil inlet and suction pump located at the bottom, reducing the amount of oil required. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a wind turbine gearbox built-in lubrication mechanism proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the planetary gear section of the built-in lubrication mechanism in a wind turbine gearbox, as proposed in this utility model.

[0018] Figure 3 A cross-sectional view of the first planetary carrier of a wind turbine gearbox with an internal lubrication mechanism proposed in this utility model. Figure 1 ;

[0019] Figure 4 A cross-sectional view of the second planetary carrier of the built-in lubrication mechanism in a wind turbine gearbox proposed in this utility model. Figure 1 ;

[0020] Figure 5 A cross-sectional view of the first planetary carrier of a wind turbine gearbox with an internal lubrication mechanism proposed in this utility model. Figure 2 ;

[0021] Figure 6A cross-sectional view of the second planetary carrier of the built-in lubrication mechanism in a wind turbine gearbox proposed in this utility model. Figure 2 ;

[0022] Figure 7 A cross-sectional view of the second planetary carrier of the built-in lubrication mechanism in a wind turbine gearbox proposed in this utility model. Figure 3 .

[0023] In the diagram: 1. Housing; 101. Outer ring bearing; 102. Connecting component; 2. Fixed-axis large gear; 3. Small gear; 4. Input rod; 5. Drive shaft; 6. First planetary carrier; 601. First connecting rod; 7. Second planetary carrier; 701. Second connecting rod; 8. First internal gear ring; 9. Second internal gear ring; 10. First sun gear; 11. First planetary gear; 12. Second sun gear; 13. Second planetary gear; 14. First oil supply pipe; 15. First oil extraction pipe; 16. First nozzle; 17. Second nozzle; 18. First oil extraction port; 19. Second oil supply pipe; 20. Second oil extraction pipe; 21. Third nozzle; 22. Fourth nozzle; 23. Second oil extraction port. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Reference Figures 1-7 A wind turbine gearbox with an internal lubrication mechanism includes a housing 1. Two sets of planetary gears are housed within the housing 1, respectively secured by a first planetary carrier 6 and a second planetary carrier 7. The first planetary carrier 6 contains a first sun gear 10 and a first planetary gear 11 that are meshed together. The second planetary carrier 7 contains a second sun gear 12 and a second planetary gear 13 that are meshed together. The first planetary carrier 6 has two end faces, fixedly connected by a first connecting rod 601. A first oil supply pipe 14 is located within the first connecting rod 601, and a first nozzle 16 and a second nozzle 17 are mounted on the first oil supply pipe 14. The second planetary carrier 7 also has two end faces, fixedly connected by a second connecting rod 701. A second oil supply pipe 19 is located within the second connecting rod 701, and a third nozzle 21 and a fourth nozzle 22 are mounted on the second oil supply pipe 19.

[0027] Furthermore, the first planetary carrier 6 and the second planetary carrier 7 are each divided into two end faces, which are fixed by the first connecting rod 601 and the second connecting rod 701 respectively. The two connecting rods are embedded with oil pipes (the first oil pipe 14 and the second oil pipe 19 respectively) to realize oil circuit integration.

[0028] Furthermore, the nozzle layout:

[0029] The first oil pipeline 14 is equipped with two first nozzles (16×2) and one second nozzle (17×1) (symmetrically distributed).

[0030] The second oil pipeline 19 is equipped with a third nozzle 21×2 + a fourth nozzle 22×1 (symmetrically distributed).

[0031] The further advantage of using the above method is that it provides multi-angle coverage of the planetary gear meshing point and bearing area.

[0032] Based on Example 1, Example 2:

[0033] Reference Figures 1-7 One end of the housing 1 is provided with an outer ring bearing 101, and the other end of the housing 1 is provided with a fixed-axis large gear 2 and a small gear 3 that mesh with each other. The small gear 3 is provided with an input rod 4 extending to the outer end. The fixed-axis large gear 2 is provided with a drive shaft 5, which is connected to the first sun gear 10. The housing 1 is provided with a connector 102, which is used to fix the first planetary carrier 6 and the second planetary carrier 7. The first planetary carrier 6 and the second planetary carrier 7 are also provided with a first internal gear ring 8 and a second internal gear ring 9, respectively. The first planetary carrier 6 is provided with an annular first oil extraction pipe 1. 5. The bottom of the first oil extraction pipe 15 is connected to the first oil extraction port 18, and the top of the first oil extraction pipe 15 is connected to the first oil delivery pipe 14; the second planetary carrier 7 is provided with an annular second oil extraction pipe 20, the bottom of the second oil extraction pipe 20 is connected to the second oil extraction port 23, and the top of the second oil extraction pipe 20 is connected to the second oil delivery pipe 19; both the first oil extraction port 18 and the second oil extraction port 23 are provided with suction pumps, two first nozzles 16 are symmetrically arranged next to each second nozzle 17, and two third nozzles 21 are symmetrically arranged next to each fourth nozzle 22.

[0034] Furthermore, the oil extraction path in this invention is as follows:

[0035] First planetary carrier 6: Oil pool → First oil inlet 18 → Annular first oil inlet pipe 15 → First oil delivery pipe 14 → Nozzle (first nozzle 16, second nozzle 17)

[0036] Second planetary carrier 7: oil pool → second oil extraction port 23 → annular second oil extraction pipe 20 → second oil delivery pipe 19 → nozzle (third nozzle 21, fourth nozzle 22).

[0037] It is worth noting that the second nozzle 17 and the fourth nozzle 22 are both designed with a trumpet-shaped opening, which can cover a wide range of areas. The first nozzle 16 and the third nozzle 21 are both set at an angle, which can accurately spray the gear meshing surface and dead corners.

[0038] The further advantages of using the above are:

[0039] Active injection: Four types of nozzles directly cover the meshing points of the internal gear ring-planet gear, planet gear-sun gear and bearings, regardless of oil level and the tilt of housing 1;

[0040] Closed-loop oil supply: The oil inlet and suction pump located at the bottom ensure the circulation of lubricating oil, reducing the amount of oil required.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wind turbine gearbox with built-in lubrication mechanism, comprising a housing (1), characterized in that, The housing (1) is provided with two sets of planetary gears, which are respectively limited and installed by the first planetary carrier (6) and the second planetary carrier (7). The first planetary carrier (6) is provided with a first sun gear (10) and a first planetary gear (11) that are meshed with each other, and the second planetary carrier (7) is provided with a second sun gear (12) and a second planetary gear (13) that are meshed with each other. The first planetary carrier (6) is divided into two end faces, which are fixedly connected by a first connecting rod (601). The first connecting rod (601) is provided with a first oil supply pipe (14), and the first oil supply pipe (14) is provided with a first nozzle (16) and a second nozzle (17). The second planetary carrier (7) is divided into two end faces, which are fixedly connected by the second connecting rod (701). The second connecting rod (701) is provided with a second oil supply pipe (19), and the second oil supply pipe (19) is provided with a third nozzle (21) and a fourth nozzle (22).

2. A built-in lubrication mechanism for a wind turbine gearbox according to claim 1, characterized in that The housing (1) has an outer ring bearing (101) at one end and a fixed-axis large gear (2) and a small gear (3) meshing with each other at the other end. The small gear (3) has an input rod (4) extending to the outer end.

3. A built-in lubrication mechanism for a wind turbine gearbox according to claim 2, characterized in that The fixed-axis large gear (2) is provided with a transmission shaft (5), which is connected to the first sun gear (10).

4. The built-in lubrication mechanism for a wind turbine gear box according to claim 1, characterized in that, The housing (1) is provided with a connector (102) for fixing the first planetary carrier (6) and the second planetary carrier (7). The first planetary carrier (6) and the second planetary carrier (7) are also provided with a first internal gear ring (8) and a second internal gear ring (9).

5. A built-in lubrication mechanism for a wind turbine gearbox according to claim 1, characterized in that, The first planetary carrier (6) is provided with an annular first oil extraction pipe (15), the bottom of the first oil extraction pipe (15) is connected to a first oil extraction port (18), and the top of the first oil extraction pipe (15) is connected to a first oil delivery pipe (14).

6. A built-in lubrication mechanism for a wind turbine gearbox according to claim 5, characterized in that The second planetary carrier (7) is provided with an annular second oil extraction pipe (20), the bottom of the second oil extraction pipe (20) is connected to a second oil extraction port (23), and the top of the second oil extraction pipe (20) is connected to the second oil delivery pipe (19).

7. A built-in lubrication mechanism for a wind turbine gearbox according to claim 6, characterized in that A suction pump is provided in both the first oil extraction port (18) and the second oil extraction port (23). Two first nozzles (16) are symmetrically arranged next to each second nozzle (17), and two third nozzles (21) are symmetrically arranged next to each fourth nozzle (22).

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