An integrated transmission system structure and lubrication method

Abstract

The present invention discloses an integrated drive system structure and a lubrication method, which relate to the technical field of wind turbine design. It includes a bearing seat, a front main bearing, and a rear main bearing. There are a first boss and a second boss provided on the bearing seat. The cavity between the first boss and the front main bearing and the internal cavity of the front main bearing are used to store grease for lubricating the front main bearing. The cavity between the second boss and the rear main bearing and the internal cavity of the rear main bearing are used to store grease for lubricating the rear main bearing. According to the volume of the cavity between the front main bearing and the first boss and the volume of the internal cavity of the front main bearing, the grease filling amount of the front main bearing is determined. According to the volume of the cavity between the rear main bearing and the second boss and the volume of the internal cavity of the rear main bearing, the grease filling amount of the rear main bearing is determined. The above drive system structure and lubrication method apply grease lubrication to the direct-drive wind power main bearing, which can enable the front main bearing and the rear main bearing to obtain stable and good lubrication effects, improve the service life and reduce the maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine design, and particularly relates to an integrated drive system structure and a lubrication method. Background Art

[0002] As a core component of the drive system of a wind turbine, the lubrication effect of the main bearing is directly related to the operating efficiency, reliability, and lifespan of the wind turbine. More than 40% of the occurrences of excessive bearing wear are attributed to poor lubrication. Therefore, maintaining good lubrication can effectively reduce the friction and wear of the main bearing of the wind turbine, reduce the failure rate, and extend its service life.

[0003] With the research and development and iteration of wind power equipment, wind turbines are gradually developing towards an integrated direction. The integrated wind turbine adopts a direct-drive or partially direct-drive structure, highly integrates the main shaft, bearing housing, and gearbox components in the drive system, and uses an oil lubrication system to lubricate the friction areas of the bearing rollers and raceways and the gear meshing areas respectively, so as to reduce the overall weight of the machine and the manufacturing cost. However, in order to fit the design of this lubrication system, there is a large internal space margin at the main bearing of the unit, and conventional seals are difficult to inhibit the leakage and loss of lubricating oil. Moreover, the oil circuit laying of this design is complex, and the requirements for the oil circulation and filtration capabilities of the lubrication system are extremely high. Therefore, it is difficult for the main bearing to obtain a stable and good lubrication effect, which increases the maintenance cost and failure risk of the drive system of the unit. Therefore, there are still drawbacks and deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated drive system structure and a lubrication method, which solve the technical problems that the main bearing in the current wind turbine is difficult to obtain a stable and good lubrication effect, and the maintenance cost and failure risk of the drive system of the unit are increased.

[0005] To achieve the above purpose, the present invention provides an integrated drive system structure, including:

[0006] A bearing housing, on which a first boss and a second boss are provided;

[0007] A front main bearing, installed on the bearing housing;

[0008] A rear main bearing, installed on the bearing housing;

[0009] Wherein, the first boss is arranged close to the side of the front main bearing, the cavity between the first boss and the front main bearing, and the internal cavity of the front main bearing are used to store grease for lubricating the front main bearing. The second boss is arranged close to the side of the rear main shaft, and the cavity between the second boss and the rear main bearing, and the internal cavity of the rear main bearing are used to store grease for lubricating the rear main bearing.

[0010] Preferably, a third boss is further provided on the bearing seat. The third boss is arranged close to the front main bearing side, and is used for storing the grease accumulated at the front main bearing due to gravity.

[0011] Preferably, the protruding height of the third boss is higher than the height where the first sealing ring is located.

[0012] Preferably, a gearbox is further included. The bearing seat is fixedly connected to the gearbox, and the gearbox is arranged close to the rear main bearing side.

[0013] Preferably, a fourth boss is provided on the gearbox. The fourth boss is arranged close to the input end side of the gearbox, and an oil baffle is connected to the fourth boss. The oil baffle is used for storing the grease accumulated at the rear main bearing due to gravity.

[0014] Preferably, the protruding height of the fourth boss is lower than the height where the rear end cover is located.

[0015] Preferably, the connection part between the first boss and the bearing seat is in a fillet structure, and / or the connection part between the second boss and the bearing seat is in a fillet structure, which is used to promote the backflow of the grease.

[0016] Preferably, a first sealing assembly is provided on the front main bearing. The first sealing assembly includes a front retaining ring, a front end cover, a first sealing ring and a first sealing pressing plate. The front end cover is detachably connected to the bearing seat. A first recessed part is provided on the front end cover. The first sealing ring is installed in the first recessed part. The first sealing pressing plate is fixedly connected to the front end cover, and the front retaining ring is fixedly connected to the bearing seat.

[0017] Preferably, a second sealing assembly is provided on the rear main bearing. The second sealing assembly includes a rear retaining ring, a rear end cover, a second sealing ring and a second sealing pressing plate. The rear end cover is detachably connected to the bearing seat. A second recessed part is provided on the rear end cover. The second sealing ring is installed in the second recessed part. The second sealing pressing plate is fixedly connected to the rear end cover, and the rear retaining ring is fixedly connected to the bearing seat.

[0018] The present invention also provides a lubrication method for an integrated transmission system structure. For the integrated transmission system structure provided in any of the above solutions, the lubrication includes:

[0019] According to the cavity volume between the front main bearing and the first boss and the internal cavity volume of the front main bearing, determine the grease injection amount of the front main bearing, and add grease with a volume corresponding to the grease injection amount into the above cavity;

[0020] Determine the grease filling amount of the rear main bearing according to the cavity volume between the rear main bearing and the second boss and the cavity volume inside the rear main bearing, and add grease with a volume corresponding to the grease filling amount into the above cavities.

[0021] Compared with the above background art, in the integrated transmission system structure provided by the present invention, the first boss is arranged close to the front main bearing side. The cavity between the first boss and the front main bearing and the cavity inside the front main bearing are used to store grease for lubricating the front main bearing; the second boss is arranged close to the rear main shaft side. The cavity between the second boss and the rear main bearing and the cavity inside the rear main bearing are used to store grease for lubricating the rear main bearing; during lubrication, determine the grease filling amount of the front main bearing according to the cavity volume between the front main bearing and the first boss and the cavity volume inside the front main bearing, and determine the grease filling amount of the rear main bearing according to the cavity volume between the rear main bearing and the second boss and the cavity volume inside the rear main bearing. The front main bearing and the rear main bearing can obtain stable and good lubrication effects, thereby reducing the risk of unit failure and reducing the maintenance cost and maintenance cycle of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0023] Figure 1 It is a cross-sectional view of the integrated transmission system structure provided by the embodiment of the present invention;

[0024] Figure 2 is Figure 1 a partial enlarged view of part A in

[0025] Figure 3 is Figure 1 a partial enlarged view of part B in

[0026] Figures 1 to 3 In the drawings, reference numerals: 10, bearing seat; 11, first boss; 12, second boss; 13, third boss; 20, main shaft; 30, gearbox; 31, fourth boss; 311, oil baffle; 40, front main bearing; 41, first sealing assembly; 411, front retaining ring; 412, front end cover; 413, first sealing ring; 414, first sealing pressing plate; 50, rear main bearing; 51, second sealing assembly; 511, rear retaining ring; 512, rear end cover; 513, second sealing ring; 514, second sealing pressing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] The present invention provides an integrated drive system structure, and the main bearing can obtain a stable and good lubrication effect, thereby reducing the risk of unit failure and reducing the maintenance cost and maintenance cycle of the unit.

[0030] Please refer to Figures 1 to 3 together. An integrated drive system structure provided by the present invention includes a bearing housing 10, a main shaft 20, a gearbox 30, a front main bearing 40, and a rear main bearing 50.

[0031] Please refer to Figures 1 to 3 together. The bearing housing 10 is fixedly connected to the gearbox 30. The front main bearing 40 and the rear main bearing 50 are installed on the bearing housing 10. The main shaft 20 is rotatably connected to the bearing housing 10 through the front main bearing 40 and the rear main bearing 50. The main shaft 20 is fixedly connected to the input end of the gearbox 30. In this embodiment, the main shaft 20 and the input end of the gearbox 30 are fixedly connected by bolts, which is convenient for disassembly.

[0032] In this embodiment, the front main bearing 40 and the rear main bearing 50 adopt two different types of single-row tapered roller bearings. Among them, the inner diameter of the front main bearing 40 is 2600 mm, the outer diameter is 3200 mm, and the inner diameter of the rear main bearing 5014 is 2100 mm, and the outer diameter is 2500 mm.

[0033] Please refer to Figures 1 to 3, a first sealing assembly 41 is provided at the front main bearing 40. The first sealing assembly 41 includes a front retaining ring 411, a front end cover 412, a first sealing ring 413, and a first sealing pressing plate 414. Among them, the front end cover 412 is fixedly connected to the bearing housing 10 by bolts. A first recessed portion is provided on the front end cover 412, and the first sealing ring 413 is installed at the first recessed portion. The first sealing ring 413 can effectively inhibit grease leakage; the first sealing pressing plate 414 is fixedly connected to the front end cover 412 by bolts. The first sealing pressing plate 414 covers the first sealing ring 413, and the first sealing pressing plate 414 plays a role in limiting and protecting the first sealing ring 413, effectively preventing dust and water; the first sealing ring 413 can be replaced by removing the first sealing pressing plate 414. The front retaining ring 411 is fixedly connected to the bearing housing 10 by bolts, and the front retaining ring 411 plays a role in limiting the first sealing ring 413.

[0034] By providing the front retaining ring 411, the front end cover 412, the first sealing ring 413, and the first sealing pressing plate 414, the axial positioning, radial positioning, and grease lubrication sealing of the front main bearing 40 are realized, ensuring accurate positioning and good sealing of the front main bearing 40.

[0035] Please refer to Figures 1 to 3 , a first boss 11 is provided on the bearing housing 10. The first boss 11 is provided on the inner wall of the bearing housing 10 and is disposed on the side close to the front main bearing 40. The connection between the first boss 11 and the inner wall of the bearing housing 10 is in a rounded corner structure. Through such a setting, the return of lubricating grease can be promoted. The height of the protruding part of the first boss 11 is approximately the same as the height at the connection between the main shaft 20 and the front main bearing 40 at this location, and the height difference between the two does not exceed 3 mm. It should be understood that there is no contact between the first boss 11 and the main shaft 20 and thus no interference. Through such a setting, sufficient grease storage space can be reserved between the front main bearing 40 and the first boss 11.

[0036] Please refer to Figures 1 to 3 , a second sealing assembly 51 is provided at the rear main bearing 50. The second sealing assembly 51 includes a rear retaining ring 511, a rear end cover 512, a second sealing ring 513, and a second sealing pressing plate 514. Among them, the rear end cover 512 is fixedly connected to the bearing housing 10 by bolts. A second recessed portion is provided on the rear end cover 512, and the second sealing ring 513 is installed at the second recessed portion. The second sealing ring 513 can effectively inhibit grease leakage; the second sealing pressing plate 514 is fixedly connected to the rear end cover 512 by bolts. The second sealing pressing plate 514 covers the second sealing ring 513, and the second sealing pressing plate 514 plays a role in limiting and protecting the second sealing ring 513, effectively preventing dust and water; the rear retaining ring 511 is fixedly connected to the bearing housing 10 by bolts, and the rear retaining ring 511 plays a role in limiting the second sealing ring 513.

[0037] The axial positioning, radial positioning and grease lubrication sealing of the rear main bearing 50 are achieved by setting the rear retaining ring 511, the rear end cover 512, the second sealing ring 513 and the second sealing pressure plate 514, ensuring accurate positioning and good sealing of the rear main bearing 50.

[0038] Please refer to Figures 1 to 3 as well. A second boss 12 is further provided on the bearing housing 10. The second boss 12 is provided on the inner wall of the bearing housing 10 and is disposed on the side close to the rear main bearing 50. The connection between the second boss 12 and the inner wall of the bearing housing 10 is in a rounded corner structure. With such a setting, the return of the grease can be promoted. The height of the protruding part of the second boss 12 is approximately the same as the height where the main shaft 20 and the rear main bearing 50 are connected at this place, and the height difference between the two does not exceed 3 mm. It should be understood that there is no contact between the second boss 12 and the main shaft 20 and thus no interference is generated. With such a setting, sufficient grease storage space can be reserved between the rear main bearing 50 and the second boss 12.

[0039] In this embodiment, the first sealing ring 413 and the second sealing ring 513 are V-shaped sealing rings made of hydrogenated nitrile rubber.

[0040] In some of the embodiments, please refer to Figure 1 as well. A third boss 13 is further provided on the bearing housing 10. The third boss 13 is provided on the inner wall of the bearing housing 10 and is disposed on the side close to the front main bearing 40. The protruding height of the third boss 13 is higher than the height where the first sealing ring 413 is located at this place. With such a setting, the waste grease accumulated due to gravity at the front main bearing 40 can be stored.

[0041] In some of the embodiments, please refer to Figure 1 as well. The gearbox 30 is disposed on the side close to the rear main bearing 50. A fourth boss 31 is provided on the gearbox 30. The fourth boss 31 is disposed on the side close to the input end of the gearbox 30. The protruding height of the fourth boss 31 is lower than the height where the rear end cover 512 is located at this place. With such a setting, it can be avoided that the fourth boss 31 is set too high and affects the disassembly and installation of the rear end cover 512.

[0042] In some of the embodiments, please refer to Figure 1 as well. An oil baffle 311 is fixedly connected to the fourth boss 31 by bolts. Among them, the gap between the topmost position of the oil baffle 311 after being installed on the fourth boss 31 and the front end of the gearbox 30 is less than 3 mm. With such a setting, the waste grease accumulated due to gravity at the rear main bearing 50 can be stored.

[0043] By setting the third boss 13, the fourth boss 31 and the oil baffle 311, the return of the grease to the bearing can be promoted, and the waste grease caused by bearing wear can be stored, thus effectively reducing the maintenance cost and cycle of the transmission system.

[0044] During the actual installation process, the relevant dimensions of the bearing housing 10 and the main shaft 20 at the positions where the front main bearing 40 and the rear main bearing 50 are installed are determined according to the inner diameter and outer diameter dimensions of the front main bearing 40 and the rear main bearing 50; the dimensions of the first seal ring 413 are designed and determined according to the dimensions of the front main bearing 40, the bearing housing 10, and the relevant dimensions of the main shaft 20 at the position where the front main bearing 40 is installed. In this embodiment, the outer diameter of the first seal ring 413 is 2940 mm and the thickness is 25 mm.

[0045] Similarly, the dimensions of the second seal ring 513 are designed and determined according to the dimensions of the rear main bearing 50, the bearing housing 10, and the relevant dimensions of the main shaft 20 at the position where the rear main bearing 50 is installed. In this embodiment, the outer diameter of the second seal ring 513 is 2340 mm and the thickness is 25 mm.

[0046] The present invention also provides a lubrication method for an integrated transmission system structure, which lubricates the integrated transmission system structure provided in any one of the above embodiments, including:

[0047] According to the cavity volume between the front main bearing 40 and the first boss 11 and the internal cavity volume of the front main bearing 40, the grease filling amount of the front main bearing 40 is determined, and grease with a volume corresponding to the grease filling amount is added to the above cavity to lubricate the front main bearing 40;

[0048] Among them, the optimal grease filling amount of the front main bearing 40 is: 40% of the internal cavity volume of the front main bearing 40 + 100% of the cavity volume between the front main bearing 40 and the first boss 11. Based on this, the optimal grease filling amount of the front main bearing 40 is calculated to be 6.4 L.

[0049] According to the cavity volume between the rear main bearing 50 and the second boss 12 and the internal cavity volume of the rear main bearing 50, the grease filling amount of the rear main bearing 50 is determined, and grease with a volume corresponding to the grease filling amount is added to the above cavity to lubricate the rear main bearing 50.

[0050] Among them, the optimal grease filling amount of the rear main bearing 50 is: 40% of the internal cavity volume of the rear main bearing 50 + 100% of the cavity volume between the rear main bearing 50 and the second boss 12. Based on this, the optimal grease filling amount of the rear main bearing 50 is calculated to be 5.6 L.

[0051] The integrated transmission system structure and lubrication method provided by the present invention apply the structure that fits the grease lubrication of the main shaft 20 to the integrated transmission system, and adopt the method of relevant design according to the bearing parameters of the main shaft 20, which can provide stable and good grease lubrication for the front main bearing 40 and the rear main bearing 50, not only retaining the structural advantages of the integrated transmission system, but also reducing the failure risk, and reducing the maintenance cost and maintenance cycle.

[0052] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0053] Specific examples are used in this article to elaborate on the principles and implementation modes of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. An integrated transmission system structure, characterized in that, Including: A bearing housing, on which a first boss and a second boss are provided; A front main bearing, mounted on the bearing housing; a first sealing assembly is provided on the front main bearing, the first sealing assembly includes a front retaining ring, a front end cover, a first sealing ring and a first sealing pressing plate, the front end cover is detachably connected to the bearing housing, a first recessed portion is provided on the front end cover, the first sealing ring is installed in the first recessed portion, the first sealing pressing plate is fixedly connected to the front end cover, and the front retaining ring is fixedly connected to the bearing housing; A rear main bearing, mounted on the bearing housing; a second sealing assembly is provided on the rear main bearing, the second sealing assembly includes a rear retaining ring, a rear end cover, a second sealing ring and a second sealing pressing plate, the rear end cover is detachably connected to the bearing housing, a second recessed portion is provided on the rear end cover, the second sealing ring is installed in the second recessed portion, the second sealing pressing plate is fixedly connected to the rear end cover, and the rear retaining ring is fixedly connected to the bearing housing; Wherein, the first boss is arranged on the side close to the front main bearing, the cavity between the first boss and the front main bearing and the internal cavity of the front main bearing are used to store grease for lubricating the front main bearing, the second boss is arranged on the side close to the rear main bearing, the cavity between the second boss and the rear main bearing and the internal cavity of the rear main bearing are used to store grease for lubricating the rear main bearing; the front main bearing and the rear main bearing adopt two different types of single-row tapered roller bearings; the first boss is arranged on the inner wall of the bearing housing, and the height of the protruding part of the first boss is approximately the same as the height where the main shaft and the front main bearing are connected, and the height difference between the two does not exceed 3 mm; the second boss is arranged on the inner wall of the bearing housing, and the height of the protruding part of the second boss is approximately the same as the height where the main shaft and the rear main bearing are connected, and the height difference between the two does not exceed 3 mm; It further includes a gearbox, the bearing housing is fixedly connected to the gearbox, and the gearbox is arranged on the side close to the rear main bearing.

2. The integrated drive system structure according to claim 1, wherein, A third boss is further provided on the bearing housing, the third boss is arranged on the side close to the front main bearing, and the third boss is used to store the grease accumulated due to gravity at the front main bearing.

3. The integrated drive system structure according to claim 2, wherein, The protruding height of the third boss is higher than the height where the first sealing ring is located.

4. The integrated drive system structure according to claim 1, characterized in that, A fourth boss is provided on the gearbox, the fourth boss is arranged on the side close to the input end of the gearbox, and an oil baffle is connected to the fourth boss, and the oil baffle is used to store the grease accumulated due to gravity at the rear main bearing.

5. The integrated drive system structure according to claim 4, wherein, The protruding height of the fourth boss is lower than the height where the rear end cover is located.

6. The integrated drive system structure according to claim 1, wherein The connection between the first boss and the bearing housing is in a rounded corner structure, and / or the connection between the second boss and the bearing housing is in a rounded corner structure, which is used to promote the return of the grease.

7. A lubrication method for an integrated transmission system structure, characterized in that, Lubricating the integrated transmission system structure according to any one of the above claims 1-6, including: Determining the grease filling amount of the front main bearing according to the volume of the cavity between the front main bearing and the first boss and the volume of the internal cavity of the front main bearing, and adding grease with a volume corresponding to the grease filling amount into the above cavity; Determine the grease filling amount of the rear main bearing according to the cavity volume between the rear main bearing and the second boss and the internal cavity volume of the rear main bearing, and add grease with a volume corresponding to the grease filling amount into the above cavity.

Images