A front integrated main shaft wind power gear box

Abstract

The utility model relates to wind power equipment technical field especially relates to a main shaft front integrated wind power gear box. Among them, the main shaft is arranged in the bearing seat, and the bearing is arranged between the main shaft and the bearing seat, and the bearing seat is provided with first oil circuit, and the main shaft is provided with second oil circuit, and the dynamic static sealing structure is arranged between the main shaft and the bearing seat for the intercommunication of first oil circuit and second oil circuit, one end of the main shaft is fixedly connected in the planet carrier, the other end of the main shaft is used for connecting the blade, a plurality of planetary gears are connected in the planet carrier along the circumference rotation, the sun gear is engaged with the planetary gear, the planet carrier is provided with third oil circuit, and the third oil circuit is communicated with second oil circuit for the oil supply to first planetary level department. Compared with the prior art, the oil inlet structure supplies oil from the end close to the blade, the floating amount of the main shaft system close to the blade is small, the stability and the sealing property of the oil inlet structure can be guaranteed, the lubricating oil leakage can be prevented, the first planetary level department is fully lubricated, and the abrasion is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind power equipment technology, and in particular to a wind turbine gearbox with front-mounted main shaft. Background Technology

[0002] With the increasing demands for larger and lighter wind turbine units, the main shaft drive chain structure has also been transformed from the traditional non-integrated form (including three-point support and two-point support) to a pre-integrated structure, namely, the main shaft system and the first planetary assembly of the gearbox are integrated (rigid connection), and the main bearing housing and the gearbox housing are integrated.

[0003] During operation, the main bearing housing is fixed to the engine bay frame, and the main shaft experiences significant fluctuations due to hub loads. Traditional lubrication methods involve supplying oil to the first planetary component via an oil passage within the gearbox housing. A dynamic and static sealing structure is installed between the gearbox housing and the first planetary component. When the main shaft vibrates, it causes the first planetary component to vibrate, widening the gap between the main shaft and the gearbox housing, resulting in lubricant leakage. This leads to insufficient lubrication of the first planetary component, accelerated wear, and ultimately premature failure.

[0004] Therefore, there is an urgent need for a wind turbine gearbox integrated in front of the main shaft to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to propose an integrated wind turbine gearbox in front of the main shaft, which can prevent lubricating oil leakage, ensure sufficient lubrication of the first planetary component, and reduce wear.

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

[0007] A front-integrated wind turbine gearbox, comprising:

[0008] A main spindle assembly includes a main spindle, a bearing housing, and a bearing. The main spindle passes through the bearing housing, and the bearing is disposed between the main spindle and the bearing housing. The bearing housing is provided with a first oil passage, and the main spindle is provided with a second oil passage.

[0009] A dynamic and static sealing structure is provided between the main shaft and the bearing housing to connect the first oil passage and the second oil passage;

[0010] The first planetary assembly includes a planet carrier, a sun gear, and several planet gears. One end of the main shaft is fixedly connected to the planet carrier, and the other end of the main shaft is used to connect blades. Several planet gears are circumferentially rotatably connected to the planet carrier. The sun gear meshes with the planet gears. The planet carrier is provided with a third oil passage, which is connected to the second oil passage for supplying oil to the first planetary assembly.

[0011] As a preferred technical solution of the above-mentioned integrated wind turbine gearbox at the front of the main shaft, the dynamic and static sealing structure includes a bushing, which is fixed to the main shaft and has a gap between it and the bearing seat, or the bushing is fixed to the bearing seat and has a gap between it and the main shaft.

[0012] As a preferred technical solution of the above-mentioned integrated wind turbine gearbox with front of the main shaft, the bushing is provided with a fourth oil passage, the fourth oil passage including a first annular groove and a passage that are interconnected, the first annular groove being provided at the end of the bushing near the bearing housing, the bearing housing being provided with a second annular groove, the second annular groove being connected to the first annular groove and the first oil passage, and / or, the first annular groove being provided at the end of the bushing near the main shaft, the main shaft being provided with a third annular groove, the third annular groove being connected to the first annular groove and the second oil passage.

[0013] As a preferred technical solution of the above-mentioned integrated wind turbine gearbox with the main shaft front, the bearing is provided in two sets, namely a front bearing and a rear bearing. The front bearing is close to the blade, and the rear bearing is close to the first planetary component. The dynamic and static sealing structure is disposed between the front bearing and the rear bearing, and the dynamic and static sealing structure is close to the front bearing or close to the rear bearing.

[0014] As a preferred technical solution of the aforementioned integrated wind turbine gearbox at the front of the main shaft, the bearing housing is provided with a fifth oil passage, one end of which is connected to the first oil passage, and the other end of which is used to supply oil to the front bearing.

[0015] As a preferred technical solution of the above-mentioned integrated wind turbine gearbox with front of the main shaft, the main shaft is provided with a sixth oil passage, one end of the sixth oil passage is connected to the second oil passage, and the other end of the sixth oil passage is used to supply oil to the rear bearing.

[0016] As a preferred technical solution of the aforementioned integrated wind turbine gearbox with front shaft, the integrated wind turbine gearbox with front shaft further includes a pressure-bearing component. The bearing is provided in two sets, namely a front bearing and a rear bearing. The front bearing is close to the blade, and the rear bearing is close to the first planetary component. The pressure-bearing component is connected to the main shaft, and the dynamic and static sealing structure is provided between the bearing housing and the pressure-bearing component.

[0017] As a preferred technical solution of the above-mentioned integrated wind turbine gearbox with front spindle, the first planetary assembly further includes a number of pins, each of which is correspondingly arranged with a number of planetary gears. The pins are connected to the planet carrier, and the planetary gears are rotatably sleeved on the pins. The pins are provided with a seventh oil passage, one end of which is connected to the third oil passage, and the other end of which is used to supply oil to the first planetary assembly.

[0018] As a preferred technical solution of the aforementioned integrated wind turbine gearbox at the front of the main shaft, the integrated wind turbine gearbox at the front of the main shaft further includes a seal, which is disposed between the main shaft and the planetary carrier.

[0019] As a preferred technical solution of the aforementioned integrated wind turbine gearbox with front spindle, the planetary carrier is provided with an eighth oil passage, which is connected to the third oil passage, and the outlet of the eighth oil passage is directly opposite the planetary gear and / or the sun gear.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a front-integrated wind turbine gearbox. The structure includes a main shaft assembly and a first planetary gear assembly. The main shaft assembly includes a main shaft, a bearing housing, and a bearing. The main shaft passes through the bearing housing, and the bearing is positioned between the main shaft and the bearing housing. The bearing housing has a first oil passage, and the main shaft has a second oil passage. A dynamic and static sealing structure is provided between the main shaft and the bearing housing to connect the first and second oil passages. The first planetary gear assembly includes a planet carrier, several planet gears, and a sun gear. One end of the main shaft is fixedly connected to the planet carrier, and the other end is used to connect to the blades. The several planet gears are circumferentially rotatable and connected to the planet carrier. The sun gear meshes with the planet gears. The planet carrier has a third oil passage, which communicates with the second oil passage to supply oil to the first planetary gear assembly. Compared to existing technologies, this oil inlet structure supplies oil from the end closest to the blades. Because the main shaft assembly near the blades has a small float, it ensures the stability and sealing of the oil inlet structure, preventing lubricant leakage and ensuring sufficient lubrication of the first planetary gear assembly, thus reducing wear. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a structural cross-sectional view of the integrated wind turbine gearbox at the front of the main shaft provided in this embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A magnified view of part A in the image;

[0025] Figure 3 yes Figure 1 A magnified view of part B in the image.

[0026] In the picture:

[0027] 1. Main spindle; 11. Second oil passage; 12. Sixth oil passage; 2. Bearing housing; 21. First oil passage; 22. Fifth oil passage; 3. Planetary carrier; 31. Third oil passage; 4. Planetary gears; 5. Sun gear; 6. Bushing; 61. Fourth oil passage; 611. First annular groove; 612. Passage; 7. Front bearing; 8. Rear bearing; 9. Pressure bearing component; 10. Pin; 101. Seventh oil passage; 100. Gearbox assembly. Detailed Implementation

[0028] 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.

[0029] 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 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 based on the specific circumstances.

[0030] 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.

[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "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.

[0032] like Figures 1 to 3As shown, this utility model provides a front-integrated wind turbine gearbox. The structure includes a main shaft assembly and a first planetary assembly.

[0033] Specifically, the main spindle assembly includes a main spindle 1, a bearing housing 2, and a bearing. The main spindle 1 passes through the bearing housing 2, and the bearing is located between the main spindle 1 and the bearing housing 2. The bearing housing 2 is provided with a first oil passage 21, and the main spindle 1 is provided with a second oil passage 11. A dynamic and static sealing structure is provided between the main spindle 1 and the bearing housing 2 to connect the first oil passage 21 and the second oil passage 11. The first planetary assembly includes a planet carrier 3, a sun gear 5, and several planet gears 4. One end of the main spindle 1 is fixedly connected to the planet carrier 3, and the other end of the main spindle 1 is used to connect blades. Several planet gears 4 are rotatably connected to the planet carrier 3 in the circumferential direction. The sun gear 5 meshes with the planet gears 4. The planet carrier 3 is provided with a third oil passage 31, which is connected to the second oil passage 11 to supply oil to the first planetary assembly. Compared to existing technologies, this oil inlet structure supplies oil from the end closest to the blades. Because the floating amount of the main shaft assembly near the blades is small, it ensures the stability and sealing of the oil inlet structure, preventing lubricant leakage and ensuring sufficient lubrication of the first planetary assembly, thus reducing wear. It should be noted that the sun gear 5 is driven and connected to the gearbox assembly 100.

[0034] Optionally, in Embodiment 1, the dynamic and static sealing structure includes a bushing 6. The bushing 6 is fixed to the main shaft 1 and spaced apart from the bearing housing 2; or, the bushing 6 is fixed to the bearing housing 2 and spaced apart from the main shaft 1. Specifically, by providing the bushing 6, the floating amount of the main shaft 1 can be reduced, the sealing performance can be improved, and lubricant leakage can be prevented. Furthermore, the bushing 6 bears the effect of relative rotation and can be made of copper, PTFE, PA6, or other composite materials, which can increase the service life of the bushing 6.

[0035] Furthermore, the bushing 6 is provided with a fourth oil passage 61, which includes a first annular groove 611 and a passage 612 that are interconnected. The first annular groove 611 is provided at the end of the bushing 6 near the bearing housing 2. The bearing housing 2 is provided with a second annular groove that connects the first annular groove 611 and the first oil passage 21. Alternatively, the first annular groove 611 is provided at the end of the bushing 6 near the spindle 1. The spindle 1 is provided with a third annular groove that connects the first annular groove 611 and the second oil passage 11. Specifically, when the bushing 6 is fixed to the main shaft 1 and has a gap with the bearing housing 2, the first annular groove 611 is provided at the end of the bushing 6 near the bearing housing 2, which can improve the smoothness of the oil passage; in order to further increase the oil storage capacity at the dynamic and static sealing structure, the bearing housing 2 is provided with a second annular groove, which connects the first annular groove 611 and the first oil passage 21. The first annular groove 611 and the second annular groove can ensure sufficient oil volume; when the bushing 6 is fixed to the bearing housing 2 and has a gap with the main shaft 1, the first annular groove 611 is provided at the end of the bushing 6 near the main shaft 1, which can improve the smoothness of the oil passage; in order to further increase the oil storage capacity at the dynamic and static sealing structure, the main shaft 1 is provided with a third annular groove, which connects the first annular groove 611 and the second oil passage 11. The first annular groove 611 and the third annular groove can ensure sufficient oil volume.

[0036] Optionally, two sets of bearings are provided: a front bearing 7 and a rear bearing 8. The front bearing 7 is close to the blades, and the rear bearing 8 is close to the first planetary component. The dynamic and static sealing structure is disposed between the front bearing 7 and the rear bearing 8, with the dynamic and static sealing structure closer to either the front bearing 7 or the rear bearing 8. Specifically, in this embodiment, the bushing 6 is close to the front bearing 7. Utilizing the radial support of the front bearing 7, the gap at the dynamic and static seal is stably controlled. The closer it is to the front bearing 7, the better the radial support effect and the more stable the gap at the dynamic and static seal. Of course, in some other embodiments, the bushing 6 can also be disposed close to the rear bearing 8, utilizing the radial support of the rear bearing 8 to stably control the gap at the dynamic and static seal. Furthermore, if the structural space allows, the width of the bushing 6 can be increased. The larger the bushing 6 is, the greater the leakage prevention effect at the gap of the dynamic and static sealing structure, and the smaller the lubricant loss.

[0037] Optionally, the bearing housing 2 is provided with a fifth oil passage 22, one end of which is connected to the first oil passage 21, and the other end of which is used to supply oil to the front bearing 7, thereby lubricating the front bearing 7.

[0038] Optionally, the spindle 1 is provided with a sixth oil passage 12, one end of which is connected to the second oil passage 11, and the other end of which is used to supply oil to the rear bearing 8, thereby lubricating the rear bearing 8.

[0039] Optionally, the integrated wind turbine gearbox at the front of the main shaft also includes a pressure-bearing component 9. Two sets of bearings are provided: a front bearing 7 and a rear bearing 8. The front bearing 7 is close to the blades, and the rear bearing 8 is close to the first planetary component. The pressure-bearing component 9 is connected to the main shaft 1, and a dynamic and static sealing structure is provided between the bearing housing 2 and the pressure-bearing component 9. Specifically, in embodiment 2, the dynamic and static sealing structure includes a bushing 6, which is fixed to the bearing housing 2 and has a gap between it and the pressure-bearing component 9. Alternatively, the bushing 6 is fixed to the pressure-bearing component 9 and has a gap between it and the bearing housing 2. The bearing housing 2 has a through first oil passage, and the bushing 6 has a fourth oil passage 61 connected to the first oil passage. The pressure-bearing component 9 has a second oil passage, with its two ends connected to the fourth oil passage 61 and the third oil passage 31, respectively. The pressure-bearing component 9 can provide stable support, adjust the clearance, and bear the load, ensuring the normal operation of the rear bearing 8 and extending its service life. It should be noted that the bushing 6 in Example 2 has the same structure as the bushing 6 in Example 1, and will not be described again here.

[0040] Optionally, the first planetary assembly also includes several pins 10, which are arranged one-to-one with several planetary gears 4. The pins 10 are connected to the planet carrier 3, and the planetary gears 4 are rotatably sleeved on the pins 10. The pins 10 are provided with a seventh oil passage 101. One end of the seventh oil passage 101 is connected to the third oil passage 31, and the other end of the seventh oil passage 101 is used to supply oil to the first planetary assembly to achieve lubrication of the entire first planetary assembly.

[0041] Furthermore, the first planetary assembly also includes several planetary bearings, which are arranged in a one-to-one correspondence with several pins 10. The inner ring of the planetary bearing is fixed to the pin 10, and the outer ring of the planetary bearing is fixed to the planetary gear 4. The seventh oil passage 101 can lubricate the planetary bearings.

[0042] Optionally, the integrated wind turbine gearbox before the main shaft also includes a seal, which is disposed between the main shaft 1 and the planetary carrier 3. Specifically, the main shaft 1 and the planetary carrier 3 are rigidly connected, and a seal is provided at the mating surface to prevent lubricant leakage. Further, the seal is an O-ring or a gasket.

[0043] Optionally, the planetary carrier 3 is provided with an eighth oil passage, which is connected to the third oil passage 31, and the outlet of the eighth oil passage is directly opposite the planetary gear 4 and / or the sun gear 5, so as to further realize the lubrication of the planetary gear bearing, the meshing of the planetary gear 4 with the ring gear, the meshing of the planetary gear 4 with the sun gear 5, the spline gear pair, and other positions.

[0044] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A wind turbine gearbox integrated before the main shaft, characterized in that, include: The main spindle assembly includes a main spindle (1), a bearing housing (2), and a bearing. The main spindle (1) passes through the bearing housing (2), and the bearing is disposed between the main spindle (1) and the bearing housing (2). The bearing housing (2) is provided with a first oil passage (21), and the main spindle (1) is provided with a second oil passage (11). A dynamic and static sealing structure is provided between the main shaft (1) and the bearing seat (2) to connect the first oil passage (21) and the second oil passage (11); The first planetary assembly includes a planet carrier (3), a sun gear (5), and several planet gears (4). One end of the main shaft (1) is fixedly connected to the planet carrier (3), and the other end of the main shaft (1) is used to connect blades. Several planet gears (4) are circumferentially connected to the planet carrier (3). The sun gear (5) meshes with the planet gears (4). The planet carrier (3) is provided with a third oil passage (31), which is connected to the second oil passage (11) for supplying oil to the first planetary assembly.

2. The integrated wind turbine gearbox before the main shaft according to claim 1, characterized in that, The dynamic and static sealing structure includes a bushing (6), which is fixed to the main shaft (1) and has a gap with the bearing seat (2), or the bushing (6) is fixed to the bearing seat (2) and has a gap with the main shaft (1).

3. The integrated wind turbine gearbox before the main shaft according to claim 2, characterized in that, The bushing (6) is provided with a fourth oil passage (61), which includes a first annular groove (611) and a passage (612) that are interconnected. The first annular groove (611) is located at the end of the bushing (6) near the bearing seat (2). The bearing seat (2) is provided with a second annular groove that connects the first annular groove (611) and the first oil passage (21). Alternatively, the first annular groove (611) is located at the end of the bushing (6) near the spindle (1). The spindle (1) is provided with a third annular groove that connects the first annular groove (611) and the second oil passage (11).

4. The integrated wind turbine gearbox before the main shaft according to claim 1, characterized in that, The bearing is provided in two sets, namely a front bearing (7) and a rear bearing (8). The front bearing (7) is close to the blade, and the rear bearing (8) is close to the first planetary component. The dynamic and static sealing structure is provided between the front bearing (7) and the rear bearing (8), and the dynamic and static sealing structure is close to the front bearing (7) or close to the rear bearing (8).

5. The integrated wind turbine gearbox before the main shaft according to claim 4, characterized in that, The bearing housing (2) is provided with a fifth oil passage (22), one end of which is connected to the first oil passage (21), and the other end of which is used to supply oil to the front bearing (7).

6. The integrated wind turbine gearbox before the main shaft according to claim 4, characterized in that, The main shaft (1) is provided with a sixth oil passage (12), one end of which is connected to the second oil passage (11), and the other end of which is used to supply oil to the rear bearing (8).

7. The integrated wind turbine gearbox before the main shaft according to claim 1, characterized in that, The integrated wind turbine gearbox at the front of the main shaft also includes a pressure-bearing component (9). The bearing is provided in two sets, namely a front bearing (7) and a rear bearing (8). The front bearing (7) is close to the blade, and the rear bearing (8) is close to the first planetary component. The pressure-bearing component (9) is connected to the main shaft (1). The dynamic and static sealing structure is provided between the bearing seat (2) and the pressure-bearing component (9).

8. A front-integrated wind turbine gearbox according to any one of claims 1-7, characterized in that, The first planetary assembly also includes a plurality of pins (10), each of which is corresponding to a plurality of planetary gears (4). The pins (10) are connected to the planet carrier (3), and the planetary gears (4) are rotatably sleeved on the pins (10). The pins (10) are provided with a seventh oil passage (101), one end of which is connected to the third oil passage (31), and the other end of which is used to supply oil to the first planetary assembly.

9. A front-integrated wind turbine gearbox according to any one of claims 1-7, characterized in that, The integrated wind turbine gearbox in front of the main shaft also includes a seal, which is disposed between the main shaft (1) and the planetary carrier (3).

10. A front-integrated wind turbine gearbox according to any one of claims 1-7, characterized in that, The planetary carrier (3) is provided with an eighth oil passage, which is connected to the third oil passage (31), and the outlet of the eighth oil passage is directly opposite the planetary gear (4) and / or the sun gear (5).

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