Offshore megawatt wind turbine bearing seat

Abstract

The application relates to the technical field of fan bearing seats, in particular to a large-megawatt fan bearing seat on the sea, which comprises a base, a shell, a main shaft, a bearing, a filtering assembly and an oil injection assembly; the base is fixedly installed with the shell, the shell is rotatably installed with the main shaft through the bearing, the outer side of the shell is fixedly installed with the filtering assembly, the inner side of the shell is fixedly installed with the oil injection assembly, and the oil injection assembly is located below the main shaft; the oil injection assembly is driven by the main shaft to drive the lubricating oil in the shell to enter the filtering assembly for filtering, and the clean lubricating oil is delivered to the bearing for lubrication; the application solves the problems that the existing fan bearing seat needs to adopt an independent lubricating control system when lubricating the bearing, the land occupation area of the whole equipment is increased, the equipment cost is increased, and the impurities in the lubricating oil cannot be completely removed through single filtering of the lubricating equipment.

Description

Technical Field

[0001] This invention relates to the field of wind turbine bearing housing technology, particularly to offshore megawatt-class wind turbine bearing housings. Background Technology

[0002] Offshore megawatt-class wind turbine bearing housings are core load-bearing components installed on the nacelle base to support and secure the main shaft bearings. Their primary function is to provide a precise mounting position for the main shaft bearings and to withstand the enormous radial and axial loads transmitted from the wind turbine. Modern megawatt-class bearing housings mostly employ an integral cast structure, using internal reinforcing ribs and optimized material distribution to ensure strength and rigidity under extreme loads. Meanwhile, with technological advancements, new structures such as welded designs have also emerged to reduce weight and shorten production cycles.

[0003] In the existing technology, the bearings on the fan generate rolling friction during rotation. Therefore, it is necessary to spray lubricating oil on the bearings to achieve lubrication. However, the entire lubrication equipment requires an independent lubrication control system, which increases the footprint and cost of the equipment. Furthermore, the lubrication equipment usually only filters the lubricating oil once, which cannot completely remove impurities from the lubricating oil. Summary of the Invention

[0004] The technical objective of this invention is to solve the problem that existing wind turbine bearing housings require an independent lubrication control system for lubricating bearings, which leads to an increased footprint and cost of the entire equipment, and the lubrication equipment cannot completely remove impurities from the lubricating oil in a single filtration.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: Offshore megawatt-class wind turbine bearing housing, including: base, housing, main shaft, bearing, filter assembly and oil injection assembly; A housing is fixedly installed on the base. A main shaft is rotatably mounted on the housing via a bearing. A filter assembly is fixedly installed on the outside of the housing. An oil spraying assembly is fixedly installed inside the housing and is located below the main shaft. The spindle drives the oil injection assembly to draw lubricating oil from inside the housing into the filter assembly for filtration, and then delivers the clean lubricating oil to the bearings for lubrication.

[0006] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, the oil injection assembly includes a bracket, a cylinder, a rotating shaft, a spiral blade, a pinion, an output pipe, a ring, an input pipe, and a large gear. Four supports are linearly arrayed and fixedly installed inside the housing, with each of the four supports forming a pair. A cylinder is fixedly installed on each of the two pairs of supports, and a rotating shaft is rotatably installed between the two cylinders. A spiral blade is installed on the rotating shaft inside each of the two cylinders, and a small gear is fixedly installed on the rotating shaft between the two cylinders. An output pipe communicating with the inside of the cylinder is fixedly installed on the end of each of the two cylinders away from the small gear, and the two output pipes are sealed through the housing and communicate with the filter assembly. Two rings are fixedly installed at both ends of the housing, and two bearings are located inside each of the two rings. Input pipes are fixedly installed on the outer circumference of each of the two rings, and the two input pipes are sealed through the housing and communicate with the filter assembly. A large gear is fixedly installed on the main shaft, and the large gear meshes with the small gear.

[0007] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, an opening is respectively provided on the outer circumferential wall of the two cylinders near the end of the pinion.

[0008] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, the two spiral blades have opposite spiral directions.

[0009] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing of the present invention, wherein: an annular through hole is provided inside the annular ring, an annular groove is provided on both sides of the annular through hole, a plurality of circular holes are arranged in annular array around the axis on the annular inner wall of the annular ring, and the plurality of circular holes are respectively located on one side of the bearing, and an oil inlet hole is provided on each of the two annular rings, which is connected to the two input pipes respectively.

[0010] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, the minimum circumferential inner diameter of the ring is smaller than the minimum circumferential inner diameter of the bearing.

[0011] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, the filter assembly includes a housing, a partition, a frame, a filter box, an oil inlet pipe, an oil outlet pipe, and a connecting pipe. The housing is fixedly installed on the outer shell. A partition is provided inside the housing. A frame is fixedly installed on both sides of the partition. Multiple filter boxes are arranged inside the frame. One end of the two oil inlet pipes is sealed through the housing and connected to the two output pipes respectively. The other end is sealed through the frame and connected to the top of the filter box respectively. One end of the two oil outlet pipes is sealed through the housing and connected to the two input pipes respectively. The other end is sealed through the frame and connected to the bottom of the filter box respectively. The multiple filter boxes are connected to each other through multiple connecting pipes.

[0012] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, a filter plate is fixedly installed inside the filter box, and multiple filter holes are respectively opened on the filter plate.

[0013] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, the diameter of the filter holes on the multiple filter plates on both sides of the partition plate decreases progressively from top to bottom.

[0014] As a preferred embodiment of the offshore megawatt-class wind turbine bearing housing described in this invention, the housing, partition, frame, filter box, oil inlet pipe, oil outlet pipe and connecting pipe are all made of heat-conducting metal, and the housing can be provided with an inlet and an outlet for cooling water.

[0015] The beneficial effects of this invention are: 1. This invention, by setting up an oil injection assembly and a filter assembly, uses the rotation of the main shaft to drive the oil injection assembly to draw the lubricating oil inside the housing into the filter assembly for multi-layer filtration, and then delivers the filtered lubricating oil to the bearing to lubricate the bearing. This eliminates the need for an additional lubrication control system and an additional power source, reducing the footprint of the entire equipment and lowering the cost. Furthermore, through multiple filtrations by the filter assembly, impurities in the lubricating oil are thoroughly removed.

[0016] 2. This invention provides an oil spraying assembly inside the housing. The main shaft drives the spiral blades on the oil spraying assembly to rotate, which in turn pushes the lubricating oil inside the housing outward. After being filtered by the filter assembly, the oil enters the inner ring and is sprayed onto both sides of the bearing through the circular holes on the ring, thereby achieving lubrication of the entire bearing. This reduces the footprint of the entire equipment and lowers the cost of the equipment.

[0017] 3. This invention features a filter assembly on the outer casing. Through multiple filter boxes on the filter assembly, impurities in the lubricating oil are filtered step by step and multiple times, thereby thoroughly removing impurities from the lubricating oil and ensuring that the clean lubricating oil can better lubricate and protect the bearing. At the same time, cooling water can be connected to the inside and outside of the housing to cool the high-temperature lubricating oil during the filtration process, thereby achieving heat dissipation for the entire bearing housing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure in an embodiment of this disclosure.

[0019] Figure 2 This is a three-dimensional structural diagram of the entire embodiment of this disclosure from another perspective.

[0020] Figure 3 This is a three-dimensional structural diagram of the interior of the outer shell in an embodiment of this disclosure.

[0021] Figure 4 This is a three-dimensional structural diagram of the oil spraying assembly inside the housing in an embodiment of this disclosure.

[0022] Figure 5 This is a three-dimensional structural diagram of the inner surface of the ring in an embodiment of this disclosure.

[0023] Figure 6 This is a three-dimensional structural diagram of the internal structure of the filter component in an embodiment of this disclosure.

[0024] Figure 7 This is a three-dimensional structural diagram of the filter box in an embodiment of this disclosure.

[0025] Figure 8 This is a three-dimensional structural diagram of the fuel injection assembly without the annulus, input pipe, and large gear in the embodiments of this disclosure.

[0026] Reference numerals: 1. Base; 2. Housing; 3. Main shaft; 4. Bearing; 5. Filter assembly; 51. Box; 52. Partition plate; 53. Partition frame; 54. Filter box; 541. Filter plate; 542. Filter hole; 55. Oil inlet pipe; 56. Oil outlet pipe; 57. Connecting pipe; 6. Oil injection assembly; 61. Bracket; 62. Cylinder; 621. Opening; 63. Rotating shaft; 64. Spiral blade; 65. Pinion; 66. Output pipe; 67. Ring; 671. Annular through hole; 672. Annular groove; 673. Round hole; 674. Oil inlet hole; 68. Input pipe; 69. Large gear. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 8 As shown, the bearing housing for a large-megawatt offshore wind turbine includes: a base 1, a housing 2, a main shaft 3, a bearing 4, a filter assembly 5, and an oil injection assembly 6. A housing 2 is fixedly installed on the base 1. A main shaft 3 is rotatably installed on the housing 2 via a bearing 4. A filter assembly 5 is fixedly installed on the outside of the housing 2. An oil spraying assembly 6 is fixedly installed inside the housing 2 and is located below the main shaft 3. The main shaft 3 drives the oil injection assembly 6 to bring the lubricating oil inside the housing 2 into the filter assembly 5 for filtration, and then delivers the clean lubricating oil to the bearing 4 for lubrication.

[0029] The base 1 and the outer shell 2 are fixedly assembled by welding. The main shaft 3 is rotatably assembled inside the outer shell 2 through the bearing 4. The bearing 4 serves as a supporting rotating component for the main shaft 3, which can effectively reduce the frictional resistance during the high-speed rotation of the main shaft 3, bear the axial and radial loads during the operation of the main shaft 3, and ensure the smooth and high-precision rotation of the main shaft 3 to meet the high-power transmission requirements of large megawatt-level wind turbines.

[0030] The filter assembly 5 adopts an external assembly structure, which does not occupy the internal transmission and lubrication space of the outer shell 2, and facilitates the later equipment maintenance, filter element replacement and impurity cleaning, adapting to the operation and maintenance needs of offshore wind turbines; the oil injection assembly 6 can specifically complete the lubricating oil delivery and spray lubrication operations.

[0031] Under normal operating conditions, the continuous rotation of the main shaft 3 serves as the power source, synchronously driving the oil injection assembly 6 inside the outer casing 2. Through the mechanical transmission and fluid propulsion of the oil injection assembly 6, the lubricating oil stored inside the outer casing 2 is agitated and extracted, causing the lubricating oil to be directionally delivered to the filter assembly 5 on the outside of the outer casing 2. The lubricating oil undergoes multi-stage filtration, impurity interception, purification, and cooling treatment through the filter assembly 5, effectively filtering out metal shavings, oil stains, and other impurities generated during long-term use of the lubricating oil, and removing contaminants from the oil. The clean lubricating oil purified by the filter assembly 5 is then precisely delivered to the operating area of ​​the bearing 4 through pipelines. Through directional oil spraying and immersion coverage, the rotating bearing 4 is lubricated in all directions, effectively reducing frictional loss and heat generation during bearing operation. At the same time, the circulating flow of the lubricating oil carries away the heat generated by the components during operation, ultimately achieving continuous, circulating, and clean automatic lubrication of the bearing housing, significantly improving the operational stability and service life of the bearing housing of large-megawatt offshore wind turbines.

[0032] like Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, the fuel injection assembly 6 includes a bracket 61, a cylinder 62, a rotating shaft 63, a spiral blade 64, a pinion 65, an output pipe 66, a ring 67, an input pipe 68, and a large gear 69; Four supports 61 are linearly arrayed and fixedly installed inside the outer casing 2, with each of the four supports 61 forming a pair. Two sets of supports 61 are each fixedly mounted with a cylinder 62. A rotating shaft 63 is rotatably mounted between the two cylinders 62. A spiral blade 64 is respectively installed on the rotating shaft 63 located inside the two cylinders 62. A small gear 65 is fixedly mounted on the rotating shaft 63 between the two cylinders 62. An output pipe 66 communicating with the interior of the cylinder 62 is fixedly mounted on the end of each cylinder 62 away from the small gear 65. The two output pipes 66 are sealed through the outer casing 2 and communicate with the filter assembly 5. Two rings 67 are fixedly mounted at both ends of the outer casing 2, and two bearings 4 are respectively located inside the two rings 67. Input pipes 68 are fixedly mounted on the outer circumference of each of the two rings 67, and the two input pipes 68 are sealed through the outer casing 2 and communicate with the filter assembly 5. A large gear 69 is fixedly mounted on the main shaft 3, and the large gear 69 meshes with the small gear 65.

[0033] The bracket 61 provides a stable support foundation for the overall lubrication transmission structure; the symmetrical layout of the double cylinders 62 enables bidirectional synchronous pumping of lubricating oil, significantly improving lubrication supply efficiency. The spiral blades 64 are precisely fitted with the inner wall of the cylinders 62 and rotate synchronously at high speed with the rotating shaft 63, forming a stable fluid pushing pressure inside the cylinders 62 to provide power for the circulation and delivery of lubricating oil. The pinion 65 is used to receive the rotational power of the main shaft 3, achieving synchronous power transmission.

[0034] The output pipe 66 adopts a sealed assembly structure. The end of the pipe is sealed through the side wall of the outer shell 2, and the external pipeline is precisely connected to the filter assembly 5 on the outside of the outer shell 2. This ensures that the impurity-containing lubricating oil pushed by the spiral blades 64 inside the cylinder 62 can be sealed and transported to the filter assembly 5 throughout the process, avoiding lubricating oil leakage and pressure loss, while preventing external impurities from entering the oil circuit.

[0035] Two bearings 4 are fitted one-to-one inside two rings 67. The rings 67 can limit, position and protect the bearings 4, and at the same time provide an installation reference for precise lubrication spraying. The inlet pipe 68 adopts a sealed through structure to penetrate the side wall of the outer shell 2. The outside of the pipe is connected to the oil outlet of the filter assembly 5, which can stably introduce the clean lubricating oil after filtration, purification and cooling into the oil circuit structure inside the rings 67.

[0036] During operation, the main shaft 3 drives the large gear 69 to rotate, and through gear meshing, it drives the small gear 65 and the overall rotating shaft 63 to rotate synchronously. No additional drive equipment is required. The lubrication system can be started and stopped automatically by relying on the original power of the fan main shaft 3.

[0037] like Figure 8As shown, openings 621 are respectively provided on the outer circumference of the two cylinders 62 near the end of the pinion 65.

[0038] The opening 621 serves as an oil intake channel for lubricating oil, ensuring that the lubricating oil stored in the cavity of the outer shell 2 can flow smoothly and evenly into the internal cavity of the cylinder 62. Under the negative pressure suction and fluid pushing action generated by the high-speed rotation of the spiral vane 64, the lubricating oil inside the outer shell 2 can be continuously replenished into the cylinder 62 through the openings 621 on both sides of the cylinder 62, providing a sufficient oil supply for lubricating oil circulation pumping and filtration lubrication.

[0039] The two spiral blades 64 have opposite spiral directions.

[0040] The two spiral blades 64 are arranged in opposite directions because they rotate synchronously and coaxially with the same rotating shaft 63. During the high-speed rotation of the rotating shaft 63, the two sets of oppositely arranged spiral blades 64 can respectively generate the same fluid pushing pressure inside the two cylinders 62, so that the lubricating oil in both cylinders 62 can be continuously and directionally delivered to the outward output pipe 66.

[0041] like Figure 5 As shown, the annular through hole 671 is provided inside the annular through hole 671, and annular grooves 672 are provided on both sides of the annular through hole 671. Multiple circular holes 673 are arranged in a circular array around the axis on the inner wall of the annular ring 67, and the multiple circular holes 673 are located on one side of the bearing 4. Oil inlet holes 674 are provided on the two rings 67 respectively, which are connected to the two input pipes 68.

[0042] The annular through-hole 671 serves as the main channel for lubricating oil to enter the interior of the ring 67. It has a large flow cross-sectional area and smooth oil supply, which can meet the needs of large-flow lubricating oil delivery. Multiple circular holes 673 are arranged at equal angles, providing comprehensive oil spray coverage. They can be precisely aligned with the rotating friction contact area of ​​the bearing 4 to achieve point-to-point spray lubrication, effectively improving the lubrication uniformity and heat dissipation of the bearing 4.

[0043] like Figure 4 As shown, the minimum circumferential inner diameter of the ring 67 is less than the minimum circumferential inner diameter of the bearing 4.

[0044] It is worth noting that the minimum circumferential inner diameter of the ring 67 is smaller than that of the bearing 4. This is to create a certain gap between the ring 67 and the spindle 3, so that after the lubricating oil is sprayed onto the bearing 4 for cooling and lubrication, the lubricating oil can flow downward along the gap between the ring 67 and the spindle 3 and eventually flow into the bottom of the housing 2.

[0045] like Figure 6As shown, the filter assembly 5 includes a housing 51, a partition 52, a frame 53, a filter box 54, an oil inlet pipe 55, an oil outlet pipe 56, and a connecting pipe 57. The housing 51 is fixedly installed on the outer shell 2. A partition 52 is provided inside the housing 51. A partition frame 53 is fixedly installed on both sides of the partition 52. Multiple filter boxes 54 are provided inside the partition frame 53. One end of the two oil inlet pipes 55 is sealed through the housing 51 and connected to the two output pipes 66 respectively. The other end is sealed through the partition frame 53 and connected to the top of the filter box 54 respectively. One end of the two oil outlet pipes 56 is sealed through the housing 51 and connected to the two input pipes 68 respectively. The other end is sealed through the partition frame 53 and connected to the bottom of the filter box 54. The multiple filter boxes 54 are connected to each other through multiple connecting pipes 57.

[0046] The housing 51 is the external protective shell of the filter assembly 5, and is fixedly installed on the outer wall of the outer shell 2. The partition 52 evenly divides the internal cavity of the housing 51 into two independent filter chambers on the left and right sides, realizing independent filtration of oil on both sides, which effectively corresponds to the dual-path oil delivery structure of the two sets of cylinders 62.

[0047] Multiple filter boxes 54 are installed detachably inside the side frames 53. The multiple filter boxes 54 are arranged in series in the upper and lower levels. The lubricating oil can flow through each level of filter box 54 from top to bottom, and the metal shavings, oil particles, impurities and dust and other pollutants in the oil are intercepted and filtered step by step. The lubricating oil can be filtered step by step, which can greatly improve the impurity interception effect and achieve deep purification of the oil.

[0048] When maintaining the filter assembly 5 later, the filter box 54 inside the housing 51 can be directly removed, and the impurities inside the filter box 54 can be cleaned. After cleaning, the filter box 54 can be installed inside the housing 51, which greatly improves the maintenance efficiency of the filter assembly 5.

[0049] like Figure 7 As shown, a filter plate 541 is fixedly installed inside the filter box 54, and a plurality of filter holes 542 are respectively opened on the filter plate 541.

[0050] As the core purification component of the single-stage filter box 54, the filter plate 541 is tightly fitted and fixed to the box body 51 of the filter box 54. The filter hole 542 has a precisely matched design, which can not only ensure the rapid penetration and flow of large flow of lubricating oil to meet the oil supply requirements of continuous circulation lubrication of the fan bearing seat, but also effectively intercept solid impurities such as metal shavings, oxidized sludge, and fine dust particles mixed in the oil.

[0051] The diameter of the filter holes 542 on the multiple filter plates 541 on both sides of the partition 52 decreases from top to bottom.

[0052] The diameter of the filter holes 542 on the multiple filter plates 541 is set in a gradient that decreases from top to bottom. The filter holes 542 on the uppermost filter plate 541 have the largest diameter, which can preferentially intercept large particulate impurities, blocky sludge and large metal shavings mixed in the lubricating oil, complete the primary coarse filtration, and prevent large particulate impurities from clogging the lower precision filtration structure. As the lubricating oil flows down level by level, the diameter of the filter holes 542 on the lower filter plates 541 decreases in turn, which can gradually intercept the fine particles, fine grinding powder and suspended oil impurities remaining in the oil, and finally achieve gradient deep purification of the lubricating oil from coarse filtration to fine filtration. The progressively decreasing arrangement of the filter holes 542 effectively solves the drawbacks of single-pore filter plates 541, such as easy clogging, low filtration efficiency, and incomplete purification. It ensures the smooth flow of high-flow oil in the upper layer, avoiding oil circuit congestion that affects lubrication circulation efficiency, while the microporous structure in the lower layer ensures the high cleanliness of the final oil output. This fully meets the lubricating oil purification needs of long-term continuous, high-flow circulation in the bearing housings of large-megawatt offshore wind turbines.

[0053] The housing 51, partition 52, partition frame 53, filter box 54, oil inlet pipe 55, oil outlet pipe 56 and connecting pipe 57 are all made of heat-conducting metal, and the housing 51 can be provided with an inlet and an outlet for cooling water.

[0054] The housing 51, partition 52, frame 53, filter box 54, oil inlet pipe 55, oil outlet pipe 56, and connecting pipe 57 are all made of high thermal conductivity metal. This type of material has the characteristics of high thermal conductivity, fast heat transfer speed, high structural strength, and excellent corrosion resistance. It can not only meet the structural load-bearing and corrosion resistance requirements under harsh marine conditions, but also serve as a heat exchange medium for the entire area. This allows the high-temperature lubricating oil flowing inside the filter assembly 5 to quickly exchange heat with the external environment, achieving passive and uniform cooling of the lubricating oil and avoiding problems such as excessively high local oil temperature and uneven heat dissipation. At the same time, the side wall of the housing 51 is provided with water inlet and outlet adapted to the cooling circulation. Cooling water can be supplied to the inside of the housing 51 through the external cooling water supply pipeline connected to the water inlet. Utilizing the all-area thermal conductivity of the high thermal conductivity metal components, forced convection heat exchange is performed on the high-temperature lubricating oil flowing in each stage of the filtration structure inside the housing 51, quickly removing the large amount of heat generated by the high-speed circulation friction of the lubricating oil. After heat exchange, the heated cooling water can be discharged in time through the outlet of the housing 51. By continuously introducing low-temperature cooling water and discharging high-temperature return water, the lubricating oil can be actively and precisely cooled, effectively controlling the working temperature of the circulating lubricating oil. At the same time, the bearing 4 and spindle 3 inside the bearing housing can be cooled and heated.

[0055] The working principle of this invention is as follows: When the main shaft 3 rotates, the large gear 69 and the small gear 65 mesh with each other. Therefore, when the main shaft 3 drives the large gear 69 to rotate, it also drives the small gear 65 to rotate. The small gear 65 will drive the rotating shaft 63 to rotate, and the rotating shaft 63 will drive the spiral blade 64 to rotate. The lubricating oil inside the outer shell 2 enters the cylinder 62 through the opening 621 on the cylinder 62. Through the rotating spiral blade 64, the lubricating oil inside the cylinder 62 is pushed into the output pipe 66. Since the output pipe 66 is connected to the oil inlet pipe 55, the lubricating oil will enter the oil inlet pipe 55 and then enter the first-layer filter box 54 through the oil inlet pipe 55. It will be filtered through the filter holes 542 on the filter plate 541 inside the filter box 54. After the initial filtration, the lubricating oil passes through the connecting pipe 57 to the next filter box 54 for further filtration. This process continues until the lubricating oil, after being filtered through multiple filter boxes 54, enters the input pipe 68 through the oil outlet pipe 56. It then flows into the annular through hole 671 of the ring 67, and then into the annular groove 672. Finally, the clean lubricating oil is discharged through the circular hole 673 on the inner side of the ring 67. The discharged lubricating oil is sprayed onto the bearing 4 and lubricates the rotating bearing 4. After lubrication, the lubricating oil is discharged back into the housing 2 through the gap between the bearing 4 and the ring 67, and is discharged again through the spiral blade 64, thus achieving circulating lubrication.

[0056] During this process, the meshing rotation of the large gear 69 and the small gear 65 will also drive the lubricating oil inside the housing 2 to flow, and lubricate the large gear 69, the small gear 65 and the main shaft 3.

[0057] It should be noted that during the entire process of lubricating oil circulation, cooling water can be connected to the inlet on the housing 51 to cool the high-temperature lubricating oil extracted from the shell 2 and then reintroduced into the shell 2 for cooling and lubrication. After heat exchange, the cooling water is discharged through the outlet on the housing 51, thereby achieving cooling and lubrication of the entire bearing housing.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bearing housing for a large-megawatt offshore wind turbine, characterized in that, include: Base (1), housing (2), spindle (3), bearing (4), filter assembly (5) and oil injection assembly (6); A housing (2) is fixedly installed on the base (1). A main shaft (3) is rotatably installed on the housing (2) via a bearing (4). A filter assembly (5) is fixedly installed on the outside of the housing (2). An oil spray assembly (6) is fixedly installed inside the housing (2), and the oil spray assembly (6) is located below the main shaft (3). The main shaft (3) drives the oil injection assembly (6) to bring the lubricating oil inside the housing (2) into the filter assembly (5) for filtration, and delivers the clean lubricating oil to the bearing (4) for lubrication.

2. The offshore megawatt-class wind turbine bearing housing as described in claim 1, characterized in that: The fuel injection assembly (6) includes a bracket (61), a cylinder (62), a rotating shaft (63), a spiral blade (64), a pinion (65), an output pipe (66), a ring (67), an input pipe (68), and a large gear (69). Four supports (61) are linearly arrayed and fixedly installed inside the outer casing (2), with the four supports (61) arranged in pairs. Two sets of supports (61) are each fixedly mounted with a cylinder (62). A rotating shaft (63) is rotatably mounted between two cylinders (62). A spiral blade (64) is provided on the rotating shaft (63) located inside the two cylinders (62). A small gear (65) is fixedly mounted on the rotating shaft (63) between the two cylinders (62). A communication channel connecting the inside of the cylinder (62) is fixedly mounted on one end of each cylinder (62) away from the small gear (65). The output pipe (66) is sealed through the outer shell (2) and connected to the filter assembly (5). The two rings (67) are fixedly installed at both ends of the outer shell (2). The two bearings (4) are located inside the two rings (67). The input pipes (68) are fixedly installed on the outer circumference of the two rings (67). The two input pipes (68) are sealed through the outer shell (2) and connected to the filter assembly (5). The large gear (69) is fixedly installed on the main shaft (3). The large gear (69) meshes with the small gear (65).

3. The offshore megawatt-class wind turbine bearing housing as described in claim 2, characterized in that: The two cylinders (62) have openings (621) on the outer circumference of the end near the pinion (65).

4. The offshore megawatt-class wind turbine bearing housing as described in claim 2, characterized in that: The two spiral blades (64) have opposite spiral directions.

5. The offshore megawatt-class wind turbine bearing housing as described in claim 2, characterized in that: The inner side of the ring (67) is provided with an annular through hole (671), and the two sides of the annular through hole (671) are respectively provided with annular grooves (672). The inner wall of the ring (67) is provided with a plurality of circular holes (673) arranged in annular array with the axis as the center, and the plurality of circular holes (673) are respectively located on one side of the bearing (4). The two rings (67) are respectively provided with oil inlet holes (674) that pass through the annular through hole (671), and the two oil inlet holes (674) are respectively connected to the two input pipes (68).

6. The offshore megawatt-class wind turbine bearing housing as described in claim 2, characterized in that: The minimum circumferential inner diameter of the ring (67) is less than the minimum circumferential inner diameter of the bearing (4).

7. The offshore megawatt-class wind turbine bearing housing as described in claim 2, characterized in that: The filter assembly (5) includes a housing (51), a partition (52), a frame (53), a filter box (54), an oil inlet pipe (55), an oil outlet pipe (56), and a connecting pipe (57); The housing (51) is fixedly installed on the outer shell (2). A partition (52) is provided inside the housing (51). A partition frame (53) is fixedly installed on both sides of the partition (52). Multiple filter boxes (54) are provided inside the partition frame (53). One end of the two oil inlet pipes (55) is sealed through the housing (51) and connected to the two output pipes (66) respectively. The other end is sealed through the partition frame (53) and connected to the top of the filter box (54) respectively. One end of the two oil outlet pipes (56) is sealed through the housing (51) and connected to the two input pipes (68) respectively. The other end is sealed through the partition frame (53) and connected to the bottom of the filter box (54). The multiple filter boxes (54) are connected to each other through multiple connecting pipes (57).

8. The offshore megawatt-class wind turbine bearing housing as described in claim 7, characterized in that: The filter box (54) is fixedly installed with a filter plate (541), and the filter plate (541) has a plurality of filter holes (542).

9. The offshore megawatt-class wind turbine bearing housing as described in claim 7, characterized in that: The diameter of the filter holes (542) on the multiple filter plates (541) on both sides of the partition (52) decreases from top to bottom.

10. The offshore megawatt-class wind turbine bearing housing as described in claim 7, characterized in that: The housing (51), partition (52), partition frame (53), filter box (54), oil inlet pipe (55), oil outlet pipe (56) and connecting pipe (57) are all heat-conducting metals, and the housing (51) can be provided with an inlet and an outlet for cooling water.

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