Lubricating structure for wind power gear box, gear box and wind power equipment

Abstract

The invention discloses a lubricating structure for a wind power gear box, the gear box and wind power equipment, and the lubricating structure comprises a main oil supply part which comprises a main oil way extending in the axial direction of the main oil supply part and a plurality of oil through holes communicating with the main oil way and supplying oil to an outer side rotating part in the radial direction; the first oil supply assembly comprises a first supporting piece and an oil inlet pipe, and one end of the oil inlet pipe communicates with an inner cavity of the first supporting piece and the oil through hole; and the second oil supply assembly comprises a secondary oil inlet ring arranged on the main oil supply piece in a sleeving mode and a second supporting piece arranged on the outer side of the secondary oil inlet ring in a sleeving mode, a secondary oil way surrounding the main oil supply piece is formed between the secondary oil inlet ring and the main oil supply piece, and the secondary oil way communicates with the oil through hole on one hand and communicates with an inner cavity of the second supporting piece on the other hand. The main oil supply part, the first oil supply assembly and the second oil supply assembly are arranged in the hollow area in the gearbox, and oil ways are communicated, so that frictional wear generated by relative rotation of the oil supply assemblies in the lubricating oil inlet structure of the wind power gearbox can be avoided or reduced.

Description

Technical Field

[0001] This disclosure generally relates to the field of wind power technology. More specifically, this disclosure relates to a lubrication structure for a wind turbine gearbox, the gearbox, and wind power equipment. Background Technology

[0002] The reliability of the oil inlet structure in the lubrication system of a wind turbine gearbox directly affects the operational reliability and service life of the gearbox. In recent years, wind turbines have become increasingly larger, and their operating environment has shifted from onshore to offshore, leading to a significant increase in the operation and maintenance costs of wind turbine gearboxes. Their reliability and maintenance costs even directly impact the development of wind turbine gearbox manufacturers. The lubrication oil inlet structure of wind turbine gearboxes typically uses a ring-shaped part that mates with a relatively rotating component to provide lubrication to the internal rotating parts. To prevent wear on the ring-shaped part, a certain clearance is usually provided between them. Current wind turbine gearbox technology is shifting from a three-point support system to a two-point support system. Gearbox design must consider the deformation of the main shaft and integrate it with the main shaft design. The clearance size design of the low-speed stage oil inlet structure must also consider compensating for the impact of main shaft deformation. If the gearbox system deforms excessively, causing contact wear of the rotating mating parts of the oil inlet structure during operation, it is very likely to cause wind turbine gearbox failure.

[0003] In view of this, there is an urgent need to provide a lubrication structure, gearbox, and wind power equipment for wind turbine gearboxes, so as to avoid or reduce contact wear of rotating mating parts in the lubrication inlet structure during operation and improve the on-tower maintainability of the wind turbine gearbox lubrication inlet structure. Summary of the Invention

[0004] In order to at least address one or more of the technical problems mentioned above, this disclosure provides, in several aspects, a lubrication inlet structure for wind turbine gearboxes, gearboxes, and wind power equipment.

[0005] In a first aspect, this disclosure provides a lubrication structure for a wind turbine gearbox, comprising: a main oil supply component, including a main oil passage extending axially therein and a plurality of oil passages communicating with the main oil passage and supplying oil to a rotating component radially outward; a first oil supply assembly, including a first support member and an oil inlet pipe, one end of the oil inlet pipe communicating with the inner cavity of the first support member and the other end communicating with the oil passages; and a second oil supply assembly, including a second support member and a secondary oil inlet ring, the secondary oil inlet ring being sleeved on the outside of the main oil supply component, the second support member being sleeved on the outside of the secondary oil inlet ring, and a secondary oil passage surrounding the main oil supply component being formed between the secondary oil inlet ring and the main oil supply component, the secondary oil passage communicating with the oil passages on one side and with the inner cavity of the second support member on the other side.

[0006] In some embodiments, a third oil supply component is also included, which includes a third support member and a three-stage oil inlet ring. The three-stage oil inlet ring is sleeved on the outside of the main oil supply component, and the third support member is sleeved on the outside of the three-stage oil inlet ring. The three-stage oil inlet ring and the main oil supply component form a three-stage oil passage around the main oil supply component. The three-stage oil passage is connected to the oil passage hole on one hand and to the inner cavity of the third support member on the other hand.

[0007] In some embodiments, the plurality of oil passages include a first oil passage, a second oil passage, and a third oil passage arranged sequentially and at intervals along the axial direction of the main oil supply component. The oil inlet pipe is connected to the first oil passage, the secondary oil passage is connected to the second oil passage, and the tertiary oil passage is connected to the third oil passage.

[0008] In some embodiments, the main oil supply component is provided with multiple main oil passages, each of which is connected to multiple oil passages.

[0009] In some embodiments, there is a gap between the first support member and the main oil supply member.

[0010] In some embodiments, a gap is provided between the secondary oil inlet ring and the main oil supply component, and a gap is provided between the secondary oil inlet ring and the second support component; a gap is provided between the tertiary oil inlet ring and the main oil supply component, and a gap is provided between the tertiary oil inlet ring and the third support component.

[0011] In some embodiments, the first oil supply assembly further includes a flexible connector disposed radially outside the main oil supply assembly, and the first support member is disposed radially outside the flexible connector along the main oil supply assembly.

[0012] In some embodiments, the flexible connector is formed as a ring and sleeved on the outside of the main oil supply component.

[0013] In a second aspect, this disclosure provides a wind turbine gearbox, including a lubrication inlet structure for a wind turbine gearbox according to the first aspect and embodiments.

[0014] In a third aspect, this disclosure provides a wind power device including a wind turbine gearbox as described in the second aspect.

[0015] The lubrication inlet structure, gearbox, and wind power equipment provided above for wind turbine gearboxes, by setting a main oil supply component and a first oil supply assembly and a second oil supply assembly arranged around the main oil supply component and connecting the main oil supply component with the oil circuit of the first oil supply assembly and the second oil supply assembly, can avoid or reduce contact wear caused by the rotation of the rotating parts in the lubrication structure, and improve the tower maintainability of the wind turbine gearbox lubrication inlet structure. Attached Figure Description

[0016] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 An exemplary cross-sectional view of a lubrication structure for a wind turbine gearbox according to some embodiments of this disclosure is shown; Figure 2 Detailed cross-sectional views of a lubrication structure for a wind turbine gearbox according to some embodiments of this disclosure are shown; Figure 3 This document discloses a three-dimensional spatial layout diagram of a lubrication structure for a wind turbine gearbox, representing some embodiments. Detailed Implementation

[0017] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0018] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0019] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0020] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0021] This disclosure provides a lubrication oil inlet structure for a wind turbine gearbox and a wind power device. By setting a main oil supply component and a first oil supply assembly and a second oil supply assembly arranged around the main oil supply component, and connecting the oil passages of the main oil supply component with the first oil supply assembly and the second oil supply assembly, it can avoid or reduce contact wear caused by the rotation of the rotating parts in the lubrication structure, and improve the tower maintainability of the wind turbine gearbox lubrication oil inlet structure.

[0022] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0023] See Figure 1 and Figure 2 , Figure 1 A simplified exemplary cross-sectional view of a lubrication structure for a wind turbine gearbox, according to some embodiments of this disclosure, is shown. Figure 2 An exemplary cross-sectional view of a lubrication structure for a wind turbine gearbox, according to some embodiments of this disclosure, is shown.

[0024] In this embodiment, the lubrication structure for a wind turbine gearbox disclosed herein includes a main oil supply component 10, a first oil supply assembly, and a second oil supply assembly. The main oil supply component 10 includes a main oil passage 1 extending axially therein and a plurality of oil passages communicating with the main oil passage 1 and supplying oil to a rotating component radially outward. The first oil supply assembly includes a first support member 4 and an oil inlet pipe 3, one end of which communicates with the inner cavity of the first support member 4, and the other end of which communicates with the oil passages. The second oil supply assembly includes a second support member 6 and a secondary oil inlet ring 5, the secondary oil inlet ring 5 being sleeved on the outside of the main oil supply component 10, the second support member 6 being sleeved on the outside of the secondary oil inlet ring 5, and a secondary oil passage 51 surrounding the main oil supply component 10 being formed between the secondary oil inlet ring 5 and the main oil supply component 10, the secondary oil passage 51 communicating with the oil passages on one side and with the inner cavity of the second support member 6 on the other side.

[0025] Specifically, the main oil supply component 10 has a main oil passage 1 for supplying lubricating oil to the gearbox. The main oil supply component 10 is formed as a cylindrical thin-walled structure, and the main oil passage 1 extends axially along the structure. One side of the main oil supply component 10 is connected to the main oil passage of the lubrication system for oil supply. Along the axial direction of the structure, a plurality of radially extending oil passages are provided. One side of the oil passages communicates with the main oil passage 1, and the other side communicates with the outside of the main oil supply component 10, so as to distribute the lubricating oil flowing through the main oil supply component 10 to various locations in the gearbox that require lubrication.

[0026] The first support member 4 is disposed radially outward of the structural member, and may be, for example, part of a gearbox rotation support member. The first support member 4 may be fixed relative to the main oil supply member 10. The oil inlet pipe 3 is a pipe independently disposed radially outward of the main oil supply member 10, and may be fixedly connected to both the first support member 4 and the main oil supply member 10. The first support member 4 is hollow inside to receive and transmit the lubricating oil delivered by the oil inlet pipe 3, and the interior of the first support member 4 may be connected to the oil passages of adjacent components through internal oil passages to lubricate the connected components.

[0027] The secondary oil inlet ring 5 is made of metal or other non-metallic materials. Its radially inner side forms a clearance fit with the aforementioned structural component, allowing it to rotate relative to the main oil supply component 10. A secondary oil passage 51 is provided inside the secondary oil inlet ring 5, which connects to the oil delivery channel 61 within the second support component 6. When the secondary oil inlet ring 5 is fitted onto the outer periphery of the first main oil supply component 10, the secondary oil passage 51 connects to the second oil passage 12 of the main oil supply component 10 to receive the lubricating oil delivered by the main oil passage 1 and transmit it to the second support component 6. The second support component 6 is part of an oil pipeline and contains multiple oil delivery channels 61 for delivering lubricating oil to connected components. Therefore, when the gearbox is working, the second support assembly can rotate around the main oil supply component 10 as a whole, and at the same time communicate with the main oil supply component 10 through the secondary oil inlet ring 5, receive the lubricating oil provided by the main oil supply component 10 and distribute it to the components connected thereto, thereby realizing the lubrication of the rotating components connected to the second support assembly.

[0028] Further, or optionally, a third oil supply assembly is also included, comprising a third support member 8 and a three-stage oil inlet ring 7. The three-stage oil inlet ring 7 is sleeved outside the main oil supply member 10, and the third support member 8 is sleeved outside the three-stage oil inlet ring 7. A three-stage oil passage 71 is formed between the three-stage oil inlet ring 7 and the main oil supply member 10, surrounding the main oil supply member 10. The three-stage oil passage 71 communicates with an oil passage hole on one side and with the oil delivery passage 81 of the third support member 8 on the other. Similar to the second-stage oil inlet ring 5, the radially inner side of the three-stage oil inlet ring 7 forms a clearance fit with the main oil supply member 10, allowing it to rotate relative to the main oil supply member 10. The three-stage oil inlet ring 7 has a three-stage oil passage 71 communicating with the outer side, and the three-stage oil passage 71 is connected to the oil delivery passage 81 within the third support member 8. When the three-stage oil inlet ring 7 is fitted around the outer periphery of the main oil supply component 10, the three-stage oil passage 71 is connected to the third oil passage 13 of the main oil supply component 10 to receive the lubricating oil delivered by the main oil passage 1 and transmit it to the third support component 8. The third support component 8 can also be a support component for gears or other components, and it also has multiple oil delivery passages 81 inside, which are used to deliver lubricating oil to the components connected to it. During operation, the third oil supply component can be configured as a rotating component with a different rotational speed than the second oil supply component, so as to form a lubrication structure for components with different rotational speeds along the axial direction of the first oil supply pipe 3.

[0029] When the lubrication structure is in operation, for example, the rotational speed of the main oil supply component 10 and the first support component 4 is n1, the rotational speed of the second oil supply assembly is n2, and the rotational speed of the third oil supply assembly is n3. Therefore, the relative rotational speeds of the main oil supply component 10 and the second oil supply assembly are n2-n1, and the relative rotational speeds of the main oil supply component 10 and the third oil supply assembly are n3-n1. Thus, the first, second, and third oil supply assemblies can rotate relative to each other at different speeds, and all can communicate with the lubrication assembly to receive lubricating oil.

[0030] In this embodiment, the plurality of oil passages include a first oil passage 11, a second oil passage 12, and a third oil passage 13, which are sequentially spaced along the axial direction of the main oil supply component 10. The oil inlet pipe 3 is connected to the first oil passage 11, the secondary oil passage 51 is connected to the second oil passage 12, and the tertiary oil passage 71 is connected to the third oil passage 13. The first oil passage 11 is located on the side of the first support member 4 away from the second oil supply component, and the second oil passage 12 and the third oil passage 13 are sequentially arranged along the axial direction on the side of the first support member 4 facing the second oil supply component. Thus, by setting the first oil passage 11, the second oil passage 12, and the third oil passage 13 to be sequentially spaced along the axial direction, the oil pressure of the lubricating oil flowing in the main oil supply component 10 can be gradually and smoothly released at the first oil passage 11, the second oil passage 12, and the third oil passage 13, avoiding excessive local pressure differences and ensuring that the oil is always in a stable flow state in the pipeline.

[0031] In this embodiment, the main oil supply component 10 is provided with a main oil passage 1, which is connected to multiple oil passages. Specifically, multiple main oil passages 1 can be provided within the main oil supply component 10, surrounding the axis of the main oil supply component 10. These multiple main oil passages 1 extend along the axial direction of the main oil supply component 10. Each main oil passage 1 is connected to an oil supply mechanism such as an oil pump on one hand, and is connected to multiple oil passages on the other hand. By providing these multiple main oil passages 1, the lubricating oil for supplying the gearbox can be evenly supplied to the multiple oil passages around the circumference of the main oil supply component 10, and its oil supply pressure and oil supply volume are more stable and average.

[0032] In this embodiment, there is a gap between the first support member 4 and the main oil supply member 10. That is, the radially inner side of the first support member 4 is completely spaced apart from the outer wall of the main oil supply member 10. By setting this gap, direct contact between the first support member 4 and the main oil supply member 10 is avoided when relative deformation occurs.

[0033] In this embodiment, a gap is provided between the secondary oil inlet ring 5 and the main oil supply component 10, and a gap is provided between the secondary oil inlet ring 5 and the second support component 6; a gap is provided between the tertiary oil inlet ring 7 and the main oil supply component 10, and a gap is provided between the tertiary oil inlet ring 7 and the third support component 8. The gaps between the secondary oil inlet ring 5 and the main oil supply component 10 and the second support component 6, and the gaps between the tertiary oil inlet ring 7 and the main oil supply component 10 and the third support component 8, prevent direct contact between the oil inlet rings and the main oil supply component 10 and the support component. In addition, the gaps also ensure that the support component and the main oil supply component 10 are completely connected through the oil inlet rings. When the second oil supply assembly and the third oil supply assembly rotate relative to the main oil supply component 10, they only rely on the radial inner sides of the secondary oil inlet ring 5 and the tertiary oil inlet ring 7 to cooperate with the main oil supply component 10 and rotate relative to it.

[0034] In this embodiment, the first oil supply assembly further includes a flexible connector 2, which is disposed radially outside the main oil supply component 10. The first support component 4 is disposed radially outside the flexible connector 2 along the main oil supply component 10. The flexible connector 2 is generally annular and can be made of an elastic material such as rubber. This flexible connector can accommodate and compensate for bending or tilting of the first support component 4 relative to the main oil supply component 10, and maintain the seal of the inner cavity of the first support component 4, reducing the probability of lubricating oil leakage. Even when there is a gap between the first support component 4 and the main oil supply component 10, the elasticity of the flexible connector 2 itself allows for a tighter fit between it and the main oil supply component 10, improving sealing performance. Furthermore, by utilizing the elasticity of the flexible connector 2, a flexible connection is formed between the first support 4 and the main oil supply component 10. By reducing the contact pressure generated when the oil inlet rings of the second and third oil supply components come into contact with the main oil supply component 10, and / or reducing the inner diameter of the secondary oil inlet ring 5 and the tertiary oil inlet ring 7, the contact wear generated when the rotating parts rotate relative to the main oil supply component 1 can be avoided or reduced.

[0035] Furthermore, according to the calculation formula for gap leakage, by controlling the inner and outer diameters of the secondary oil inlet ring 5 and the tertiary oil inlet ring 7, the lubricating oil leakage of the lubrication structure can be reduced, the reliability of the lubrication structure can be improved, and the manufacturability of the secondary oil inlet ring 5 and the tertiary oil inlet ring 7 can be improved, thereby reducing the overall production cost of the lubrication structure and the production and procurement cost of the lubrication system.

[0036] In this embodiment, the flexible connector 2 is formed as a ring and sleeved on the outside of the main oil supply component 10. The ring-shaped flexible connector 2 can provide a more comprehensive seal to the chamber located on the side of the first support 4 facing the second oil supply assembly on the radially outer side of the main oil supply component 10, and through the mating process with the main oil supply component 10, a clearance fit or interference fit is formed, thereby further reducing the probability of lubricating oil leakage. However, those skilled in the art will understand that this disclosure does not limit the specific structure of the flexible connector 2. For example, in some embodiments not shown, the flexible connector 2 can be formed by splicing multiple arc segments, or formed as a spiral shape surrounding the main oil supply component 10, etc. Furthermore, multiple flexible connectors 2 can be arranged axially on the main oil supply component 10 to further reduce the probability of lubricating oil leakage through multiple sealing methods.

[0037] According to some embodiments of this disclosure, the lubrication oil inlet structure for a wind turbine gearbox, by providing a main oil supply component and a first oil supply assembly and a second oil supply assembly arranged around the main oil supply component, and connecting the main oil supply component with the oil passages of the first oil supply assembly and the second oil supply assembly, can avoid or reduce contact wear generated when the rotating parts in the lubrication structure rotate.

[0038] See Figure 2 and Figure 3 , Figure 3 An exemplary perspective view of a lubrication structure for a wind turbine gearbox according to some embodiments of this disclosure is shown, with some housing components removed to clearly show its internal structure. The second oil supply assembly further includes a secondary oil inlet ring pressure plate 52, which is generally annular and sleeved on the outside of the main oil supply component 10. The secondary oil inlet ring pressure plate 52 abuts against the secondary oil inlet ring 5 axially toward the second support member 6 and is fastened to the second support member 6 by bolts or other fasteners to fix the secondary oil inlet ring 5 axially. Similarly, the third oil supply assembly also includes a tertiary oil inlet ring pressure plate 72, which abuts against the tertiary oil inlet ring 7 axially toward the third support member 8 and is fastened to the third support member 8 by bolts or other fasteners to fix the tertiary oil inlet ring 7 axially.

[0039] According to some embodiments of this disclosure, the lubrication oil inlet structure for wind turbine gearboxes is configured with a first support member 4 and a second support member 6 with decreasing diameters. When the secondary oil inlet ring 5 experiences wear failure, the secondary oil inlet ring 5 can be disassembled and replaced and reassembled by disassembling the oil inlet pipe 3, the first support member 4, adjusting the axial position of the main oil supply member 10, and disassembling the secondary oil inlet ring pressure plate 52, thus achieving maintainability of the secondary oil inlet ring on the tower.

[0040] According to some embodiments of the lubrication oil inlet structure for wind turbine gearboxes disclosed herein, when the third-stage oil inlet ring 7 experiences wear failure, based on the disassembly of parts when the second-stage oil inlet ring fails, the third-stage oil inlet ring pressure plate 72 is disassembled, and the third-stage oil inlet ring 7 is disassembled, replaced, and then reassembled, thereby achieving maintainability of the third-stage oil inlet ring on the tower.

[0041] In addition, this disclosure also provides a wind turbine gearbox, which includes a lubrication inlet structure for a wind turbine gearbox according to several embodiments of this disclosure and a transmission assembly connected to the lubrication structure. The transmission assembly may include gears, bearings, etc. to be lubricated.

[0042] In some embodiments, this disclosure also provides a wind power device including a wind turbine gearbox, a power generation mechanism for generating electricity, and fan blades for generating power, as described in some embodiments of this disclosure. The gearbox is connected to the fan blades on one hand to receive drive, and on the other hand to the power generation mechanism to drive the power generation mechanism to generate electricity after speed regulation.

[0043] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A lubrication arrangement for a wind turbine gearbox, c h a r a c t e r i s e d in that, The lubricating structure comprises a main oil supply part (10), a first oil supply assembly, and a second oil supply assembly. The main oil supply part (10) comprises a main oil path (1) extending along an axial direction of the main oil supply part (10) and a plurality of oil supply holes in communication with the main oil path (1) and supplying oil to a rotating component radially outward. The first oil supply assembly comprises a first support (4) and an oil inlet pipe (3) in communication with an inner cavity of the first support (4) at one end and with the oil supply holes at the other end. The second oil supply assembly comprises a second support (6) and a secondary oil inlet ring (5) sleeved outside the main oil supply part (10), the second support (6) is sleeved outside the secondary oil inlet ring (5), and a secondary oil path (51) is formed between the secondary oil inlet ring (5) and the main oil supply part (10) to surround the main oil supply part (10), the secondary oil path (51) is in communication with the oil supply holes at one end and with an inner cavity of the second support (6) at the other end.

2. The lubricating arrangement of claim 1, wherein The third oil supply assembly comprises a third support (8) and a tertiary oil inlet ring (7) sleeved outside the main oil supply part (10), the third support (8) is sleeved outside the tertiary oil inlet ring (7), and a tertiary oil path (71) is formed between the tertiary oil inlet ring (7) and the main oil supply part (10) to surround the main oil supply part (10), the tertiary oil path (71) is in communication with the oil supply holes at one end and with an inner cavity of the third support (8) at the other end.

3. The lubricating arrangement of claim 2, wherein The plurality of oil supply holes comprise a first oil supply hole (11), a second oil supply hole (12), and a third oil supply hole (13) arranged in sequence along the axial direction of the main oil supply part (10), the oil inlet pipe (3) is in communication with the first oil supply hole (11), the secondary oil path (51) is in communication with the second oil supply hole (12), and the tertiary oil path (71) is in communication with the third oil supply hole (13).

4. The lubricating arrangement of claim 1 wherein, The main oil supply part (10) is provided with the main oil path (1) in communication with the plurality of oil supply holes.

5. The lubricating arrangement of claim 1 wherein, The first support (4) has a gap with the main oil supply part (10).

6. The lubricating arrangement of claim 1 wherein, The secondary oil inlet ring (5) has a gap with the main oil supply part (10) and a gap with the second support (6), and the tertiary oil inlet ring (7) has a gap with the main oil supply part (10) and a gap with the third support (8).

7. The lubricating arrangement according to any one of claims 1 to 6, characterized in that The first oil supply assembly further comprises a flexible connecting piece (2) arranged radially outward of the main oil supply part (10), and the first support (4) is arranged radially outward of the flexible connecting piece (2).

8. The lubricating arrangement of claim 7, wherein The flexible connecting piece (2) is formed in an annular shape and sleeved outside the main oil supply part (10).

9. A wind turbine gearbox, characterized in that The wind power gear box comprises the lubricating structure according to any one of claims 1 to 8.

10. A wind power plant, characterized in that The wind power gear box comprises the lubricating structure according to claim 9.

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