Wind power gear box and wind power equipment

Abstract

The invention relates to the technical field of wind power equipment, and provides a wind power gear box and wind power equipment, a hollow outer ring rotatably penetrates through an end cover assembly, the end cover assembly and the hollow outer ring define a first oil cavity, the hollow outer ring is provided with a first oil inlet hole and a first oil discharge hole, and the first oil inlet hole communicates with the first oil cavity; the felt sealing piece is arranged between the hollow outer ring and the end cover assembly, and the first oil cavity is located on the outer side of the felt sealing piece; the hollow pipe is inserted into the hollow outer ring, the hollow pipe and the hollow outer ring are coaxially fixed, the hollow pipe is provided with a second oil inlet hole and a second oil discharge hole, the second oil inlet hole communicates with the first oil inlet hole, and the second oil discharge hole communicates with the first oil discharge hole; the sealing ring is arranged on the inner side of the hollow pipe and fixed to the hollow pipe, a second oil cavity is defined by the sealing ring and the hollow pipe, and the second oil cavity communicates with the second oil inlet hole and the second oil outlet hole; the oil collecting piece is arranged on the hollow outer ring and connected with the first oil discharging hole. Therefore, the pollution of the oil leaked from the felt sealing element to the generator and the cabin can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power gearboxes, and in particular to a wind power gearbox and wind power equipment. Background Art

[0002] Currently, large-megawatt wind turbines basically adopt an integrated structure of the rear end of the main gearbox + generator. The lubricating oil of the main gearbox needs to be effectively sealed and protected, otherwise it will contaminate the generator and cabin and lead to extremely high operation and maintenance costs.

[0003] Currently, the output shaft of a wind turbine gearbox is a hollow structure, and cables for connecting electrical components in the wind turbine gearbox and a generator are arranged in the central cavity of the output shaft.

[0004] Currently, a labyrinth structure + multiple seals structure is usually used, but there is still a large proportion of oil leakage, and this part is wrapped inside the generator, with very little maintenance space, and the operation and maintenance cost of the wind turbine running on the tower is very high.

[0005] Therefore, there is an urgent need for a wind power gearbox and wind power equipment to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a wind power gearbox and wind power equipment, which can reduce the pollution of oil leaking from the felt seal to the generator and the nacelle.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Wind turbine gearbox, including:

[0009] End cover assembly;

[0010] An input shaft is rotatably provided in the end cover assembly. The interior of the input shaft is hollow to form a receiving cavity. The input end of the input shaft is located outside the end cover assembly (1). A step surface is provided inside the input end so that the input end forms a hollow outer ring. The hollow outer ring is rotatably provided in the end cover assembly. The end cover assembly and the hollow outer ring define a first oil cavity. The hollow outer ring is provided with a first oil inlet hole and a first oil outlet hole. The first oil inlet hole is connected to the first oil cavity.

[0011] A felt seal is provided between the hollow outer ring and the end cover assembly, and the first oil chamber is located outside the felt seal;

[0012] A hollow tube, the hollow tube being inserted into the hollow outer ring and the two being coaxially fixed, the hollow tube being provided with a second oil inlet hole and a second oil outlet hole, the second oil inlet hole being connected to the first oil inlet hole, and the second oil outlet hole being connected to the first oil outlet hole;

[0013] a sealing ring disposed inside the hollow tube and fixed to the hollow tube, wherein the sealing ring and the hollow tube define a second oil chamber, wherein the second oil chamber communicates with the second oil inlet hole and the second oil outlet hole;

[0014] The oil collecting member is arranged on the hollow outer ring and connected to the first oil drain hole.

[0015] As an optimal technical solution for the above-mentioned wind turbine gearbox, the above-mentioned end cover assembly includes a transparent cover and an oil baffle plate, the above-mentioned felt seal is clamped between the above-mentioned transparent cover and the above-mentioned hollow outer ring, the above-mentioned oil baffle plate and the above-mentioned transparent cover are detachably fixed, the above-mentioned oil baffle plate is sleeved on the outside of the above-mentioned hollow outer ring, and the above-mentioned transparent cover, the above-mentioned oil baffle plate and part of the above-mentioned hollow outer ring enclose the above-mentioned first oil chamber.

[0016] As a preferred technical solution of the above-mentioned wind turbine gearbox, a plurality of the above-mentioned first oil inlet holes are provided, and the plurality of the above-mentioned first oil inlet holes are arranged around the axis of the above-mentioned hollow outer ring;

[0017] There are multiple second oil inlet holes, and the multiple second oil inlet holes are arranged around the axis of the hollow outer ring;

[0018] The plurality of first oil inlet holes are connected to the plurality of second oil inlet holes in a one-to-one correspondence.

[0019] As a preferred technical solution of the above-mentioned wind turbine gearbox, the above-mentioned first oil discharge hole and the above-mentioned first oil inlet hole are arranged axially spaced apart from each other along the above-mentioned hollow outer ring, and the above-mentioned first oil discharge hole is located on a side of the above-mentioned first oil inlet hole away from the above-mentioned first oil chamber.

[0020] As an optimal technical solution for the above-mentioned wind turbine gearbox, the inner circumferential wall of the above-mentioned hollow tube is provided with a first oil collecting groove around its axis, and the outer circumferential wall of the above-mentioned sealing ring is provided with a second oil collecting groove around its own axis. The above-mentioned sealing ring is installed in the first oil collecting groove, and part of the inner wall of the above-mentioned first oil collecting groove and the inner wall of the above-mentioned second oil collecting groove enclose the above-mentioned second oil chamber.

[0021] As a preferred technical solution of the above-mentioned wind turbine gearbox, a first docking groove is formed on the outer peripheral wall of the above-mentioned hollow tube, one side opening of the above-mentioned second oil inlet hole is formed at the bottom of the above-mentioned first docking groove, the above-mentioned first oil inlet hole is connected to the above-mentioned second oil inlet hole through the above-mentioned first docking groove, and the edge contour of the above-mentioned first oil inlet hole is located in the above-mentioned first docking groove;

[0022] And / or, a second docking groove is provided on the inner circumferential wall of the hollow outer ring, one side opening of the first oil inlet hole is formed at the bottom of the second docking groove, the first oil inlet hole is connected to the second oil inlet hole through the second docking groove, and the edge contour of the second oil inlet hole is located in the second docking groove.

[0023] As a preferred technical solution of the above-mentioned wind power gearbox, the above-mentioned oil collecting component is threadedly connected to the above-mentioned first row of oil holes.

[0024] As a preferred technical solution of the above-mentioned wind power gearbox, the above-mentioned hollow tube and the above-mentioned hollow outer ring are fixed by a second threaded fastener, and the above-mentioned second threaded fastener is located outside the above-mentioned first oil chamber.

[0025] As a preferred technical solution for the above-mentioned wind turbine gearbox, the above-mentioned end cover assembly is also provided with a cooling channel, one end of the above-mentioned cooling channel is used for the entry of refrigerant, and the other end of the above-mentioned cooling channel is connected to the above-mentioned first oil chamber; the above-mentioned cooling channel is provided with a one-way valve, and the above-mentioned one-way valve allows the refrigerant to flow along the above-mentioned cooling channel to the above-mentioned first oil chamber.

[0026] A wind power device is also provided, comprising a generator, a cable and the above-mentioned wind power gearbox, wherein the above-mentioned hollow tube is connected to the above-mentioned generator, and the above-mentioned cable is passed through the above-mentioned hollow tube.

[0027] Beneficial effects of the present invention:

[0028] The present invention provides a wind power gear box and wind power equipment. The wind power gear box comprises an end cover assembly, an input shaft, a felt seal, a hollow tube, a sealing ring and an oil collecting component. Among them, the input shaft is rotatably passed through the end cover assembly, the internal hollow of the input shaft forms an accommodating cavity, the input end of the input shaft is located on the outside of the end cover assembly, and a step surface is provided inside the input end so that the input end forms a hollow outer ring and is rotatably passed through the end cover assembly, the end cover assembly and the hollow outer ring define a first oil chamber, the hollow outer ring is provided with a first oil inlet hole and a first oil drain hole, the first oil inlet hole is connected to the first oil chamber; the felt seal is provided between the hollow outer ring and the end cover assembly, and the first oil chamber is located on the outside of the felt seal; the hollow tube is inserted into the hollow outer ring and the two are coaxially fixed, the hollow tube is provided with a second oil inlet hole and a second oil drain hole, the second oil inlet hole is connected to the first oil inlet hole, and the second oil drain hole is connected to the first oil drain hole; the sealing ring is provided on the inner side of the hollow tube and fixed to the hollow tube, the sealing ring and the hollow tube define a second oil chamber, the second oil chamber is connected to the second oil inlet hole and the second oil drain hole; the oil collecting component is provided on the hollow outer ring and connected to the first oil drain hole.

[0029] Exemplarily, the end cap assembly is provided with a plug-in hole, which is a variable diameter hole and includes a first hole segment, a second hole segment, and a third hole segment. The first hole segment, the second hole segment, and the third hole segment are coaxially arranged and arranged in sequence along the axial direction, wherein the radius of the first hole segment and the radius of the third hole segment are both smaller than the radius of the second hole segment. A hollow outer ring is inserted into the plug-in hole, and a felt seal is sandwiched between the outer peripheral wall of the hollow outer ring and the inner peripheral wall of the first hole segment. The outer peripheral wall of the hollow outer ring and the inner peripheral wall of the third hole segment form a seal. The outer peripheral wall of the hollow outer ring and the second hole segment form a first oil chamber. The first oil chamber is a circular space formed around the axis of the hollow outer ring. The first oil chamber is located on the side of the felt seal facing away from the oil pool. Oil leaking from the felt seal is collected in the first oil chamber. One end of the hollow tube is fixedly inserted into the hollow outer ring, and the sealing ring and the hollow tube are fixed to form a second oil chamber. The second oil chamber is the annular space formed around the axis of the hollow tube. The first oil chamber, the first oil inlet hole, the second oil inlet hole, the second oil chamber, the second oil drain hole and the first oil drain hole are connected in sequence. The cable for connecting the wind turbine gearbox and the generator is installed in the vacant cavity of the input shaft.

[0030] When the wind turbine gearbox is running, the hollow outer ring and the hollow tube rotate relative to the end cover assembly, and the direction of rotation is rotation around their own axis. The oil in the oil pool is easily leaked from the felt seal under agitation. After the leaked oil enters the first oil chamber, part of the oil can enter the second oil chamber through the first oil inlet hole and the second oil inlet hole in sequence, and be discharged from the second oil chamber through the second oil drain hole and the first oil drain hole. This can reduce the pollution of the generator and the cabin by the oil leaked from the felt seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0032] Figure 1 Schematic diagram of the structure of a wind turbine gearbox provided by an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0034] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0035] In the picture:

[0036] 1. End cover assembly; 11. Transparent cover; 12. Oil baffle; 13. First threaded fastener; 14. Cooling channel; 141. Channel A; 142. Channel B;

[0037] 2. Hollow outer ring; 21. First oil chamber; 22. First oil inlet hole; 23. First oil drain hole;

[0038] 3. Hollow tube; 31. Second oil chamber; 32. Second oil inlet hole; 33. Second oil drain hole; 34. First docking groove; 35. Second threaded fastener;

[0039] 4. Sealing ring;

[0040] 5. Felt seals;

[0041] 6. Oil collection parts. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0043] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0046] like Figures 1 to 3 As shown, the present invention provides a wind turbine gearbox, comprising: an end cover assembly 1, an input shaft, a felt seal 5, a hollow tube 3, a sealing ring 4, and an oil collecting member 6. The input shaft is rotatably provided in the end cover assembly 1, the interior of the input shaft is hollow to form a receiving cavity, the input end of the input shaft is located outside the end cover assembly 1, and a step surface is provided inside the input end so that the input end forms a hollow outer ring 2 which is rotatably provided in the end cover assembly 1. The end cover assembly 1 and the hollow outer ring 2 define a first oil cavity 21. The hollow outer ring 2 is provided with a first oil inlet hole 22 and a first oil drain hole 23. The first oil inlet hole 22 is connected to the first oil cavity 21; the felt seal 5 is provided between the hollow outer ring 2 and the end cover assembly 1, and the first oil cavity 21 is located outside the felt seal 5; the hollow tube 3 Inserted in the hollow outer ring 2 and the two are coaxially fixed, the hollow tube 3 is provided with a second oil inlet hole 32 and a second oil drain hole 33, the second oil inlet hole 32 is connected to the first oil inlet hole 22, and the second oil drain hole 33 is connected to the first oil drain hole 23; the sealing ring 4 is arranged on the inner side of the hollow tube 3 and fixed to the hollow tube 3, the sealing ring 4 and the hollow tube 3 define a second oil chamber 31, the second oil chamber 31 is connected to the second oil inlet hole 32 and the second oil drain hole 33; the oil collecting part 6 is arranged on the hollow outer ring 2 and connected to the first oil drain hole 23, and the cable for connecting the wind power gearbox and the generator is installed in the vacant cavity of the input shaft.

[0047] Exemplarily, the end cap assembly 1 is provided with a plug-in hole, which is a variable diameter hole and includes a first hole segment, a second hole segment, and a third hole segment. The first hole segment, the second hole segment, and the third hole segment are coaxially arranged and arranged in sequence along the axial direction, wherein the radius of the first hole segment and the radius of the third hole segment are both smaller than the radius of the second hole segment. The hollow outer ring 2 is inserted into the plug-in hole, and a felt seal 5 is sandwiched between the outer peripheral wall of the hollow outer ring 2 and the inner peripheral wall of the first hole segment. The outer peripheral wall of the hollow outer ring 2 and the inner peripheral wall of the third hole segment form a seal. The outer peripheral wall of the hollow outer ring 2 and the second hole segment form a first oil chamber 21. The first oil chamber 21 is an annular space formed around the axis of the hollow outer ring 2. The first oil chamber 21 is located on the side of the felt seal 5 facing away from the oil pool. Oil leaking from the felt seal 5 is collected in the first oil chamber 21. One end of the hollow tube 3 is fixedly inserted into the hollow outer ring 2, and the sealing ring 4 and the hollow tube 3 are fixed to form a second oil chamber. The second oil chamber is an annular space formed around the axis of the hollow tube 3. The first oil chamber 21, the first oil inlet hole 22, the second oil inlet hole 32, the second oil chamber 31, the second oil drain hole 33 and the first oil drain hole 23 are connected in sequence.

[0048] When the wind turbine gearbox is running, the hollow outer ring 2 and the hollow tube 3 both rotate relative to the end cover assembly 1, and the direction of rotation is rotation around their own axis. The oil in the oil pool is easily leaked from the felt seal 5 under agitation. After the leaked oil enters the first oil chamber 21, part of the oil can enter the second oil chamber 31 through the first oil inlet hole 22 and the second oil inlet hole 32 in turn, and be discharged from the second oil chamber 31 through the second oil drain hole 33 and the first oil drain hole 23. In this way, the pollution of the generator and the cabin by the oil leaked from the felt seal 5 can be reduced.

[0049] It should be noted that a one-way valve is provided in the first oil inlet hole 22 and / or the second oil inlet hole 32 to only allow the oil to flow from the first oil chamber 21 to the second oil tank in one direction.

[0050] It should be noted that the first oil drain hole 23 and / or the second oil drain hole 33 are provided with a switch valve, which can selectively open or close the communication between the second oil chamber 31 and the external environment.

[0051] It should be noted that the central hollow portion of the hollow tube 3 and the hollow outer ring 2 is used to install the cables of the wind turbine hub control system.

[0052] Furthermore, the axes of the hollow tube 3 and the hollow outer ring 2 are arranged at an angle to the horizontal direction, that is, in the vertical direction, the first oil inlet hole 22 is located at the lowest end of the first oil chamber 21 .

[0053] Optionally, the end cover assembly 1 includes a transparent cover 11 and an oil baffle plate 12, the felt seal 5 is clamped between the transparent cover 11 and the hollow outer ring 2, the oil baffle plate 12 is detachably fixed to the transparent cover 11, the oil baffle plate 12 is sleeved on the outside of the hollow outer ring 2, and the transparent cover 11, the oil baffle plate 12 and part of the hollow outer ring 2 enclose a first oil chamber 21.

[0054] Exemplarily, the end cap assembly 1 includes a transparent cover 11 and an oil baffle 12. Both a first hole segment and a second hole segment are formed in the transparent cover 11. The first hole segment serves as the second mounting opening. The hollow outer ring 2 is inserted into both the first and second mounting openings. The oil baffle 12 is mounted in the first mounting opening. The inner ring of the oil baffle 12 forms a third hole segment. The transparent cover 11, oil baffle 12, and hollow outer ring 2 enclose a first oil chamber 21. With this arrangement, when maintaining the wind turbine gearbox, the hollow outer ring 2 can be removed from the transparent cover 11 after removing the oil baffle 12, simplifying the disassembly process.

[0055] Optionally, the oil baffle 12 and the transparent cover 11 are fixed by a first threaded fastener 13 , and the axial direction of the first threaded fastener 13 is parallel to the axial direction of the hollow outer ring 2 .

[0056] Optionally, multiple first oil inlet holes 22 are provided, arranged around the axis of the hollow outer ring 2; multiple second oil inlet holes 32 are provided, arranged around the axis of the hollow outer ring 2; and the multiple first oil inlet holes 22 are connected to the multiple second oil inlet holes 32 in a one-to-one correspondence. In this way, when the hollow tube 3 and the hollow outer ring 2 rotate relative to the end cover assembly 1, some of the first oil inlet holes 22 will always face upward to receive oil leaking from the felt seal 5.

[0057] Optionally, the first oil drain hole 23 and the first oil inlet hole 22 are spaced apart along the axial direction of the hollow outer ring 2 , and the first oil drain hole 23 is located on a side of the first oil inlet hole 22 away from the first oil chamber 21 .

[0058] Optionally, the inner wall of the hollow tube 3 is provided with a first oil collecting groove around its axis, and the outer wall of the sealing ring 4 is provided with a second oil collecting groove around its own axis. The sealing ring 4 is installed in the first oil collecting groove, and part of the inner wall of the first oil collecting groove and the inner wall of the second oil collecting groove enclose a second oil chamber 31.

[0059] Optionally, the sealing ring 4 is made of rubber and is interference fit with the hollow tube 3 in the second oil chamber 31 .

[0060] Optionally, a first docking groove 34 is provided on the outer peripheral wall of the hollow tube 3, and a side opening of the second oil inlet hole 32 is formed at the bottom of the first docking groove 34. The first oil inlet hole 22 is connected to the second oil inlet hole 32 through the first docking groove 34, and the edge contour of the first oil inlet hole 22 is located in the first docking groove 34; and / or, a second docking groove is provided on the inner peripheral wall of the hollow outer ring 2, and a side opening of the first oil inlet hole 22 is formed at the bottom of the second docking groove. The first oil inlet hole 22 is connected to the second oil inlet hole 32 through the second docking groove, and the edge contour of the second oil inlet hole 32 is located in the second docking groove.

[0061] For example, the outer peripheral wall of the hollow tube 3 is provided with a first docking groove 34, which is provided around the axis of the hollow tube 3. The length direction of the first docking groove 34 corresponds to the circumferential direction of the hollow tube 3, the width direction of the first docking groove 34 corresponds to the axial direction of the hollow tube 3, and the depth direction of the first docking groove 34 corresponds to the radial direction of the hollow tube 3. When the hollow tube 3 is inserted into the hollow outer ring 2, the inner peripheral wall of the hollow outer ring 2 closes the opening in the depth direction of the first docking groove 34. The first oil inlet hole 22 is connected to the first docking groove 34, and the second oil inlet hole 32 is provided in the bottom wall of the first docking groove 34. The width D of the first docking groove 34 satisfies d1<D<d2, where d1 is the diameter of the first oil inlet hole 22 and d2 is the diameter of the second oil inlet hole 32. This facilitates the docking of the first oil inlet hole 22 and the second oil inlet hole 32, reducing the requirements for processing accuracy.

[0062] Optionally, the hollow tube 3 and the hollow outer ring 2 are fixed by a second threaded fastener 35 , and the second threaded fastener 35 is located outside the first oil chamber 21 .

[0063] Exemplarily, the hollow outer ring 2 is provided with a through hole, the hollow tube 3 is provided with a threaded hole, and the second threaded fastener 35 passes through the through hole and is threadedly connected to the hollow tube 3 in the threaded hole.

[0064] With such arrangement, during the disassembly and assembly process, the hollow tube 3 can be removed from the hollow outer ring 2 outside the end cover assembly 1 , maintaining the connection between the hollow outer ring 2 and the end cover assembly 1 .

[0065] Furthermore, the axis of the second threaded fastener 35 is parallel to the radial direction of the hollow outer ring 2 .

[0066] Furthermore, the hollow tube 3 is connected to the hollow outer ring 2 via a plurality of second threaded fasteners 35 , and the plurality of second threaded fasteners 35 are arranged around the axis of the hollow tube 3 .

[0067] Optionally, the end cover assembly 1 is also provided with a cooling channel 14, one end of the cooling channel 14 is used for the entry of refrigerant, and the other end of the cooling channel 14 is connected to the first oil chamber 21; the cooling channel 14 is provided with a one-way valve, which allows the refrigerant to flow along the cooling channel 14 to the first oil chamber 21.

[0068] With this arrangement, refrigerant is introduced into the first oil chamber 21 through the cooling channel 14 to reduce the oil temperature. The one-way valve can prevent the oil in the first oil chamber 21 from leaking through the cooling channel 14.

[0069] Exemplarily, the cooling channel 14 includes a channel A141 and a channel B142. The channel A141 is opened along the axial direction of the hollow outer ring 2. One end of the channel A141 forms a first port on the side surface of the end cover assembly 1 facing away from the oil pool, and the other end is closed. The channel B142 is opened along the radial direction of the hollow outer ring 2. One end of the channel B142 is connected to the channel A141, and the other end forms a second port in the first oil chamber 21.

[0070] Furthermore, in the radial direction of the hollow outer ring 2 , the distance between the flow channel A141 and the axis of the hollow outer ring 2 is L1 , and the distance between the first oil chamber 21 and the axis of the hollow outer ring 2 is L2 , where L1 > L2 .

[0071] A wind power device is also provided, comprising a generator, a cable and the above-mentioned wind power gearbox, wherein the hollow tube is connected to the generator and the cable is passed through the hollow tube 3 .

[0072] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Wind power gearbox, characterized in that: include: End cover assembly (1); An input shaft is rotatably provided in the end cover assembly (1), the interior of the input shaft is hollow to form a receiving cavity, the input end of the input shaft is located outside the end cover assembly (1), a step surface is provided inside the input end so that the input end forms a hollow outer ring (2), the hollow outer ring (2) is rotatably provided in the end cover assembly (1), the end cover assembly (1) and the hollow outer ring (2) define a first oil cavity (21), the hollow outer ring (2) is provided with a first oil inlet hole (22) and a first oil outlet hole (23), and the first oil inlet hole (22) is communicated with the first oil cavity (21); A felt seal (5) is provided between the hollow outer ring (2) and the end cover assembly (1), and the first oil chamber (21) is located outside the felt seal (5); A hollow tube (3), the hollow tube (3) being inserted into the hollow outer ring (2) and the two being coaxially fixed, the hollow tube (3) being provided with a second oil inlet hole (32) and a second oil outlet hole (33), the second oil inlet hole (32) being connected to the first oil inlet hole (22), and the second oil outlet hole (33) being connected to the first oil outlet hole (23); a sealing ring (4) disposed on the inner side of the hollow tube (3) and fixed to the hollow tube (3); the sealing ring (4) and the hollow tube (3) define a second oil chamber (31); the second oil chamber (31) communicates with the second oil inlet hole (32) and the second oil outlet hole (33); An oil collecting member (6) is arranged on the hollow outer ring (2) and connected to the first oil drain hole (23).

2. The wind turbine gearbox according to claim 1, characterized in that: The end cover assembly (1) includes a transparent cover (11) and an oil baffle (12), the felt seal (5) is sandwiched between the transparent cover (11) and the hollow outer ring (2), the oil baffle (12) and the transparent cover (11) are detachably fixed, the oil baffle (12) is sleeved outside the hollow outer ring (2), and the transparent cover (11), the oil baffle (12) and a portion of the hollow outer ring (2) enclose the first oil chamber (21).

3. The wind turbine gearbox according to claim 1, characterized in that: A plurality of the first oil inlet holes (22) are provided, and the plurality of the first oil inlet holes (22) are arranged around the axis of the hollow outer ring (2); A plurality of the second oil inlet holes (32) are provided, and the plurality of the second oil inlet holes (32) are arranged around the axis of the hollow outer ring (2); The plurality of first oil inlet holes (22) are connected to the plurality of second oil inlet holes (32) in a one-to-one correspondence.

4. The wind turbine gearbox according to claim 1, characterized in that: The first oil drain hole (23) and the first oil inlet hole (22) are spaced apart along the axial direction of the hollow outer ring (2), and the first oil drain hole (23) is located on a side of the first oil inlet hole (22) away from the first oil chamber (21).

5. The wind turbine gearbox according to claim 1, characterized in that: The inner peripheral wall of the hollow tube (3) is provided with a first oil collecting groove around its axis, and the outer peripheral wall of the sealing ring (4) is provided with a second oil collecting groove around its axis. The sealing ring (4) is installed in the first oil collecting groove, and part of the inner wall of the first oil collecting groove and the inner wall of the second oil collecting groove enclose the second oil chamber (31).

6. The wind turbine gearbox according to claim 1, characterized in that: The outer peripheral wall of the hollow tube (3) is provided with a first docking groove (34), one side opening of the second oil inlet hole (32) is formed at the bottom of the first docking groove (34), the first oil inlet hole (22) is connected to the second oil inlet hole (32) through the first docking groove (34), and the edge contour of the first oil inlet hole (22) is located within the first docking groove (34); And / or, a second docking groove is formed on the inner peripheral wall of the hollow outer ring (2), one side opening of the first oil inlet hole (22) is formed at the bottom of the second docking groove, the first oil inlet hole (22) is connected to the second oil inlet hole (32) through the second docking groove, and the edge contour of the second oil inlet hole (32) is located in the second docking groove.

7. The wind turbine gearbox according to claim 1, characterized in that: The oil collecting member (6) is threadedly connected to the first oil drain hole (23).

8. The wind turbine gearbox according to claim 1, characterized in that: The hollow tube (3) and the hollow outer ring (2) are fixed via a second threaded fastener (35), and the second threaded fastener (35) is located outside the first oil chamber (21).

9. The wind turbine gearbox according to any one of claims 1 to 8, characterized in that: The end cover assembly (1) is also provided with a cooling channel (14), one end of which is used for the entry of refrigerant, and the other end of which is connected to the first oil chamber (21); the cooling channel (14) is provided with a one-way valve, which allows the refrigerant to flow along the cooling channel (14) to the first oil chamber (21).

10. Wind power equipment, characterized in that It comprises a generator, a cable and a wind turbine gearbox according to any one of claims 1 to 9, wherein the hollow tube (3) is connected to the generator, and the cable is passed through the hollow tube (3).

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