Wind turbine gearbox tube shaft, wind turbine gearbox and wind turbine

Abstract

The utility model provides a kind of wind power gear box pipe shaft, wind power gear box and wind driven generator, wind power gear box pipe shaft includes sub-tube axle, sealing element, fastener, and multiple sub-tube axles are sequentially sleeved along the axial direction of sub-tube axle;One of two sub-tube axles of relative sleeve is provided with mounting hole in the through, and the outer tube wall of one of inside is provided with the limiting hole being communicated with mounting hole;Sealing element is arranged between the two sub-tube axles of relative sleeve;Fastener is arranged at mounting hole, and one end of fastener is inserted into limiting hole and forms limit cooperation with limiting hole in the circumferential direction of sub-tube axle.The utility model discloses wind power gear box pipe shaft adopts split type structure, and is spliced by multiple sub-tube axles, and is locked by fastener between two adjacent sub-tube axles, and it is convenient to disassemble and assemble;Two adjacent sub-tube axles are sealed by sealing element, and oil leakage risk is eliminated.This kind of wind power gear box pipe shaft structure is compact, easy to maintain, and improves pipe material utilization rate simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a wind turbine gearbox tube shaft, a wind turbine gearbox, and a wind turbine generator. Background Technology

[0002] The gearbox (also known as a speed increaser) of a wind turbine generator set is a crucial component that accelerates the low-speed power generated by the wind turbine under wind conditions and transmits it to the generator. Due to limitations in the overall layout of the nacelle, sometimes the main shaft, which is directly connected to the hub, is integrated with the gearbox; other times, they are separate components connected by a shrink sleeve or coupling. To enhance braking capability, brakes are usually installed at the input or output ends of the gearbox, working in conjunction with tip braking or pitch braking. The pitch control tube shaft serves as the cable channel for the pitch system, passing through the sun gear and planetary carrier. Its front end rotates synchronously with the planetary carrier, and its rear end is fixed to the gearbox housing via bearings.

[0003] The existing assembly sequence is as follows: first, the entire tube shaft is installed, then the low-speed stage bearing end cover is installed; the tube shaft is also a one-piece design, and the gearbox is located between the wind turbine and the generator. Once the O-ring seal at the joint between the tube shaft and the gearbox fails and leaks oil, the old tube shaft must be removed and replaced. Due to the limited space in the nacelle and the length of the tube shaft, it is usually impossible to disassemble it directly in the air; the entire gearbox must be lifted out of the nacelle, resulting in long maintenance cycles, low efficiency, and high costs. Utility Model Content

[0004] The purpose of this utility model is to provide a wind turbine gearbox tube shaft, a wind turbine gearbox, and a wind turbine generator, in order to solve the problem of inconvenient replacement of existing wind turbine gearbox tube shafts.

[0005] To solve the above-mentioned technical problems, the present invention provides a wind turbine gearbox tube shaft, comprising:

[0006] Sub-tube shafts, a plurality of said sub-tube shafts are sequentially sleeved along the axial direction of said sub-tube shafts; one of the two sleeved sub-tube shafts is provided with a through mounting hole on the outer side, and the outer tube wall of the one located on the inner side is provided with a limiting hole communicating with said mounting hole;

[0007] A sealing element is provided between the two sleeved sub-tube shafts;

[0008] The fastener is provided at the mounting hole, and one end of the fastener extends into the limiting hole to form a limiting fit with the limiting hole in the circumferential direction of the sub-tube shaft.

[0009] In some embodiments, a plurality of mounting holes and a plurality of limiting holes are provided between two sleeved sub-tube shafts, arranged circumferentially along the sub-tube shafts, and a fastener is provided at each mounting hole.

[0010] In some embodiments, the fastener is a screw-in fastener, wherein:

[0011] The mounting hole and / or the limiting hole are threaded holes.

[0012] In some embodiments, a filling anti-loosening structure is provided between the screw connector and the threaded hole.

[0013] In some embodiments, the fastener is coated with adhesive.

[0014] In some embodiments, a plurality of seals are provided between two sleeved sub-tube shafts, arranged at axial intervals along the sub-tube shafts.

[0015] In some embodiments, the seal is an O-ring.

[0016] In some embodiments, at least one of the two sleeved sub-tube shafts is provided with an annular sealing groove on its tube wall to accommodate the seal.

[0017] In some embodiments, the plurality of sub-tube shafts include a first sub-tube shaft and a second sub-tube shaft, and the two ends of two adjacent first sub-tube shafts that are close to each other are respectively sleeved inside the two ends of a second sub-tube shaft.

[0018] In some embodiments, two outer annular limiting surfaces are respectively provided on the outer tube walls at the two ends of two adjacent first sub-tube shafts that are close to each other, and the two outer annular limiting surfaces on the two adjacent first sub-tube shafts respectively abut against the two sides of the second sub-tube shaft in the axial direction of the sub-tube shaft.

[0019] To achieve the above objectives, this utility model also provides a wind turbine gearbox, including the aforementioned wind turbine gearbox tube shaft.

[0020] To achieve the above objectives, this utility model also provides a wind turbine generator, including the aforementioned wind turbine gearbox.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This utility model's wind turbine gearbox tube shaft adopts a split structure, composed of multiple sub-tube shafts spliced ​​together. Adjacent sub-tube shafts are locked together with fasteners, making disassembly and assembly convenient. Adjacent sub-tube shafts are sealed with seals to eliminate the risk of oil leakage. This wind turbine gearbox tube shaft structure is compact, easy to maintain, and improves the utilization rate of pipe materials. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 This is a schematic diagram of the structure of the wind turbine gearbox tube shaft in an embodiment of this utility model.

[0025] Explanation of reference numerals in the accompanying drawings of this utility model:

[0026] Wind turbine gearbox tube shaft 100, sub-tube shaft 1, first sub-tube shaft 1a, second sub-tube shaft 1b, third sub-tube shaft 1c, mounting hole 11, limiting hole 12, annular sealing groove 13, outer annular limiting surface 14, inner annular limiting surface 15, sealing element 2, O-ring 2a, fastener 3, screw connector 3a.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] This invention provides a wind turbine gearbox tube shaft, which can be used in wind turbine gearboxes. Figure 1 A preferred embodiment of the wind turbine gearbox tube shaft provided by this utility model is shown.

[0032] Please see Figure 1 In some embodiments, the wind turbine gearbox tube shaft 100 includes a sub-tube shaft 1, a seal 2, and a fastener 3. Multiple sub-tube shafts 1 are sequentially sleeved along the axial direction of the sub-tube shaft 1. One of the two sleeved sub-tube shafts 1 is provided with a through mounting hole 11 on the outer side, and the outer tube wall of the inner side is provided with a limiting hole 12 communicating with the mounting hole 11. A seal 2 is provided between the two sleeved sub-tube shafts 1. A fastener 3 is provided at the mounting hole 11, and one end of the fastener 3 extends into the limiting hole 12 to form a limiting fit with the limiting hole 12 in the circumferential direction of the sub-tube shaft 1.

[0033] Specifically, the wind turbine gearbox tube shaft 100 adopts a split structure, which is divided into multiple sub-tube shafts 1, which are coaxial or nearly coaxial. The wind turbine gearbox tube shaft 100 is formed by splicing multiple sub-tube shafts 1 along the axial direction of the wind turbine gearbox tube shaft 100. The specific number of sub-tube shafts 1 can be set according to the actual situation. For example, there can be two, three, four, five, six or more sub-tube shafts 1. The following description will take four sub-tube shafts 1 as an example, and the axial direction of the wind turbine gearbox tube shaft 100 (i.e., the axial direction of the sub-tube shafts 1) is defined as left and right.

[0034] Multiple sub-tube shafts 1 are sequentially sleeved along the left-right direction. The ends of any two connected sub-tube shafts 1 that are close to each other are sleeved onto the outside of the other, allowing multiple sub-tube shafts 1 to be spliced ​​into a wind turbine gearbox tube shaft 100. Between any two sleeved sub-tube shafts 1, a mounting hole 11 is provided through the tube wall of the outer sub-tube shaft 1. A fastener 3 is fixedly installed at each mounting hole 11. A limiting hole 12 is provided on the outer tube wall of the inner sub-tube shaft 1 corresponding to the mounting hole 11. The end of the fastener 3 installed at the mounting hole 11, near the inner sub-tube shaft 1, extends into the limiting hole 12, allowing the fastener 3 and the limiting hole 12 to form a limiting fit in the circumferential direction of the sub-tube shaft 1. This limits the circumferential direction of the two sleeved sub-tube shafts 1, thus locking adjacent sub-tube shafts 1 together with fasteners 3, facilitating easy assembly and disassembly. The limiting hole 12 can penetrate the inner wall of the inner sub-tube shaft 1, that is, the depth of the limiting hole 12 is equal to the wall thickness of the inner sub-tube shaft 1; the limiting hole 12 may also not penetrate the inner wall of the inner sub-tube shaft 1, that is, the depth of the limiting hole 12 is less than the wall thickness of the inner sub-tube shaft 1.

[0035] The two interlocking sub-tube shafts 1 can be secured together by a single fastener 3 or by multiple fasteners 3 spaced apart circumferentially along the sub-tube shafts 1. Alternatively, please refer to... Figure 1 In some embodiments, a plurality of mounting holes 11 and a plurality of limiting holes 12 are provided between the two nested sub-tube shafts 1, arranged circumferentially around the sub-tube shaft 1. Each mounting hole 11 is provided with a fastener 3. Between any two nested sub-tube shafts 1, the outer sub-tube shaft 1 has a plurality of mounting holes 11 arranged circumferentially around the tube wall, and the inner sub-tube shaft 1 has a plurality of limiting holes 12 arranged circumferentially around the tube wall. The plurality of limiting holes 12 correspond one-to-one with the plurality of mounting holes 11. The plurality of fasteners 3 are respectively fixedly installed at the plurality of mounting holes 11, so as to fix the two nested sub-tube shafts 1 in place by the plurality of fasteners 3, and prevent the two nested sub-tube shafts 1 from detaching.

[0036] Between any two interlocking sub-tube shafts 1, a sealing element 2 is provided between the inner wall of the outer sub-tube shaft 1 and the outer wall of the inner sub-tube shaft 1. This sealing element 2 seals the joint between the two adjacent sub-tube shafts 1 to prevent oil leakage from the wind turbine gearbox. The sealing element 2 can be a sealant or a sealing ring, etc. Optionally, please refer to [reference needed]. Figure 1 In some embodiments, the seal 2 is an O-ring 2a. The following description will take the O-ring 2a as an example.

[0037] The wind turbine gearbox tube shaft 100 of this utility model adopts a split structure, which is composed of multiple sub-tube shafts 1 spliced ​​together. Adjacent sub-tube shafts 1 are locked together with fasteners 3, making disassembly and assembly convenient. Adjacent sub-tube shafts 1 are sealed together with seals 2 to eliminate the risk of oil leakage. This wind turbine gearbox tube shaft 100 has a compact structure, is easy to maintain, and improves the utilization rate of pipe materials.

[0038] The fastener 3 and the sub-tube shaft 1 are typically detachably connected. The specific configuration of the fastener 3 can be determined according to the actual situation; for example, the fastener 3 can be a riveted component or a screwed component. Optionally, please refer to... Figure 1 In some embodiments, the fastener 3 is a screw connector 3a, so that the two sleeved sub-tube shafts 1 are fixed by the screw connector 3a, making the disassembly and assembly of the two sleeved sub-tube shafts 1 easier and more convenient. The screw connector 3a can be a bolt or screw, etc. The following will take the fastener 3 as a screw connector 3a as an example.

[0039] Fastener 3 is a threaded connector 3a. Correspondingly, the mounting hole 11 and / or the limiting hole 12 are threaded holes. That is, the mounting hole 11 can be a threaded hole that mates with the threaded connector 3a, while the limiting hole 12 is not a threaded hole that mates with the threaded connector 3a; the mounting hole 11 may also be a threaded hole that does not mate with the threaded connector 3a, while the limiting hole 12 is a threaded hole that mates with the threaded connector 3a; the mounting hole 11 may also be a threaded hole that mates with the threaded connector 3a, and the limiting hole 12 may also be a threaded hole that mates with the threaded connector 3a. Optionally, please refer to... Figure 1 In some embodiments, the mounting hole 11 is a threaded hole that mates with the threaded connector 3a, and the limiting hole 12 is a snap-fit ​​hole that engages with the tail of the threaded connector 3a. Specifically, the inner surface of the mounting hole 11 has an internal thread, while the inner surface of the limiting hole 12 does not have an internal thread and is smooth. The following description will use the example of the mounting hole 11 being a threaded hole that mates with the threaded connector 3a and the limiting hole 12 being a snap-fit ​​hole that engages with the tail of the threaded connector 3a.

[0040] Optionally, please refer to Figure 1 In some embodiments, a filling anti-loosening structure is provided between the screw connector 3a and the threaded hole.

[0041] Specifically, the mounting hole 11 is a threaded hole. After the screw connector 3a is tightened into the mounting hole 11, a punch can be used to break the threads of the screw connector 3a and / or the mounting hole 11 through a filling point, thereby forming a filling point anti-loosening structure between the screw connector 3a and the threaded hole. This prevents the screw connector 3a from properly engaging with the mounting hole 11, making it difficult for the screw connector 3a to come out of the mounting hole 11. When it is necessary to remove the screw connector 3a, a wrench can be used to rotate the screw connector 3a in the opposite direction. Although the threaded pair has been broken, the screw connector 3a can be easily unscrewed by overcoming a certain pitch. The specific location of the filling point anti-loosening structure can be set according to the actual situation. For example, the filling point anti-loosening structure can be set at the end of the mounting hole 11 near the limiting hole 12; the filling point anti-loosening structure can also be set at the end of the mounting hole 11 away from the limiting hole 12.

[0042] Optionally, please refer to Figure 1 In some embodiments, the fastener 3 is coated with adhesive (not shown in the figure).

[0043] Specifically, the two interlocking sub-tube shafts 1 are fixed by fasteners 3. After applying thread adhesive, the fasteners 3 are screwed into the connection of the two interlocking sub-tube shafts 1. The adhesive can reinforce the fasteners 3 and prevent them from falling off the sub-tube shafts 1.

[0044] A seal 2 is provided between the two nested sub-tube shafts 1. The specific number of seals 2 between the two nested sub-tube shafts 1 can be set according to the actual situation. For example, there can be one seal 2 between the two nested sub-tube shafts 1, or multiple seals 2 arranged at intervals along the axial direction of the sub-tube shafts 1. Optionally, please refer to Figure 1 In some embodiments, a plurality of sealing elements 2 are provided between the two nested sub-tube shafts 1, arranged at intervals along the axial direction of the sub-tube shaft 1. The provision of multiple sealing elements 2 between the two nested sub-tube shafts 1 ensures the sealing performance at the connection point of the two nested sub-tube shafts 1.

[0045] Optionally, please refer to Figure 1 In some embodiments, at least one of the two sleeved sub-tube shafts 1 is provided with an annular sealing groove 13 for accommodating the sealing element 2 on its tube wall.

[0046] Specifically, an annular sealing groove 13 is provided on the tube wall of the sub-tube shaft 1 to enable the sealing element 2 to be installed and positioned on the sub-tube shaft 1. The annular sealing groove 13 can be provided only on the inner tube wall of the sub-tube shaft 1; or only on the outer tube wall of the sub-tube shaft 1; or on both the outer and inner tube walls of the sub-tube shaft 1. The following description will use the example of the annular sealing groove 13 being provided on the outer tube wall of the sub-tube shaft 1.

[0047] The specific connection method of multiple sub-tube shafts 1 can be set according to the actual situation. Optionally, please refer to Figure 1 In some embodiments, the plurality of sub-tube shafts 1 include a first sub-tube shaft 1a and a second sub-tube shaft 1b, and the two ends of two adjacent first sub-tube shafts 1a are respectively sleeved in the two ends of a second sub-tube shaft 1b.

[0048] Specifically, there are four sub-tube shafts 1. From left to right, the first and third sub-tube shafts 1 are both first sub-tube shafts 1a, and the second sub-tube shaft 1 is a second sub-tube shaft 1b. The outer diameter of the first sub-tube shaft 1a is equal to or approximately equal to the inner diameter of the second sub-tube shaft 1b. The first sub-tube shaft 1a is provided with a limiting hole 12 and an annular sealing groove 13, and the second sub-tube shaft 1b is provided with a mounting hole 11. The right end of the first sub-tube shaft 1a located on the left is fitted into the left end of the second sub-tube shaft 1b. A seal 2 and a fastener 3 are provided between the right end of the first sub-tube shaft 1a on the left and the left end of the second sub-tube shaft 1b on the right. The left end of the first sub-tube shaft 1a located on the right is fitted into the right end of the second sub-tube shaft 1b. A seal 2 and a fastener 3 are provided between the left end of the first sub-tube shaft 1a on the right and the right end of the second sub-tube shaft 1b on the right. Wherein, the length of sub-tube shaft 1 is the dimension of sub-tube shaft 1 along its axial direction, and the lengths of the first sub-tube shaft 1a and the second sub-tube shaft 1b may be equal or unequal. For example, please refer to... Figure 1 In some embodiments, the length of the first sub-tube shaft 1a is greater than the length of the second sub-tube shaft 1b.

[0049] Further, please refer to Figure 1 In some embodiments, two outer annular limiting surfaces 14 are respectively provided on the outer tube walls at the two ends of the two adjacent first sub-tube shafts 1a that are close to each other, and the two outer annular limiting surfaces 14 on the two adjacent first sub-tube shafts 1a abut against the two sides of the second sub-tube shaft 1b on the axial direction of the sub-tube shaft 1.

[0050] Specifically, the outer wall of the first sub-tube shaft 1a on the left side is provided with a right-facing annular limiting surface 14, which abuts against the left side of the second sub-tube shaft 1b. The outer wall of the first sub-tube shaft 1a on the right side is provided with a left-facing annular limiting surface 14, which abuts against the right side of the second sub-tube shaft 1b. Thus, through the abutting engagement between the outer annular limiting surfaces 14 of adjacent first sub-tube shafts 1a and the second sub-tube shaft 1b, the left-right upward mounting and positioning of adjacent first sub-tube shafts 1a and second sub-tube shafts 1b can be achieved.

[0051] Optionally, please refer to Figure 1 In some embodiments, the rightmost sub-tube shaft 1 is a third sub-tube shaft 1c. The left end of the third sub-tube shaft 1c is sleeved outside the right end of a first sub-tube shaft 1a. An inner annular limiting surface 15 is provided on the inner tube wall of the third sub-tube shaft 1c. The inner annular limiting surface 15 abuts against one end of the first sub-tube shaft 1a located inside the third sub-tube shaft 1c.

[0052] Specifically, the third sub-tube shaft 1c is provided with a mounting hole 11, and the inner wall of the third sub-tube shaft 1c is provided with a left-facing inner annular limiting surface 15. The right end of the first sub-tube shaft 1a located on the right side is fitted inside the left end of the third sub-tube shaft 1c, and a sealing element 2 and a fastener 3 are provided between the right end of the first sub-tube shaft 1a on the right side and the left end of the third sub-tube shaft 1c. The inner annular limiting surface 15 on the third sub-tube shaft 1c abuts against the right side of the first sub-tube shaft 1a located on the right side. In this way, through the abutting fit between the inner annular limiting surface 15 on the third sub-tube shaft 1c and the first sub-tube shaft 1a located on the right side, the installation and positioning of the first sub-tube shaft 1a and the third sub-tube shaft 1c on the right side in the left-right upward direction can be achieved.

[0053] This utility model also provides a wind turbine gearbox, which includes a wind turbine gearbox tube shaft. Since the wind turbine gearbox tube shaft adopts the technical solution of the above embodiment, it has the beneficial effects brought about by the technical solution of the above embodiment.

[0054] This utility model also provides a wind turbine generator, which includes a wind turbine gearbox. Since the wind turbine gearbox adopts the technical solution of the above embodiment, it has the beneficial effects brought about by the technical solution of the above embodiment.

[0055] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A wind turbine gearbox tube shaft, characterized in that, include: Sub-tube shafts, a plurality of said sub-tube shafts are sequentially sleeved along the axial direction of said sub-tube shafts; one of the two sleeved sub-tube shafts is provided with a through mounting hole on the outer side, and the outer tube wall of the one located on the inner side is provided with a limiting hole communicating with said mounting hole; A sealing element is provided between the two sleeved sub-tube shafts; The fastener is provided at the mounting hole, and one end of the fastener extends into the limiting hole to form a limiting fit with the limiting hole in the circumferential direction of the sub-tube shaft.

2. The wind turbine gearbox tube shaft according to claim 1, characterized in that, Between the two interlocking sub-tube shafts, there are a plurality of mounting holes and a plurality of limiting holes arranged circumferentially along the sub-tube shafts, and each mounting hole is provided with a fastener.

3. The wind turbine gearbox tube shaft according to claim 1, characterized in that, The fastener is a screw-on component, wherein: The mounting hole and / or the limiting hole are threaded holes.

4. The wind turbine gearbox tube shaft according to claim 3, characterized in that, A filling and anti-loosening structure is provided between the screwed component and the threaded hole.

5. The wind turbine gearbox tube shaft according to claim 1, characterized in that, The fastener is coated with adhesive.

6. The wind turbine gearbox tube shaft according to claim 1, characterized in that, A plurality of seals are provided between the two interlocking sub-tube shafts, arranged at intervals along the axial direction of the sub-tube shafts; and / or, The sealing element is an O-ring; and / or, At least one of the two interlocking sub-tube shafts has an annular sealing groove on its tube wall to accommodate the seal.

7. The wind turbine gearbox tube shaft according to any one of claims 1-6, characterized in that, The plurality of sub-tube shafts includes a first sub-tube shaft and a second sub-tube shaft, with the ends of two adjacent first sub-tube shafts respectively fitted into the ends of a second sub-tube shaft.

8. The wind turbine gearbox tube shaft according to claim 7, characterized in that, Two outer annular limiting surfaces are respectively provided on the outer tube walls at the two ends of the two adjacent first sub-tube shafts that are close to each other. The two outer annular limiting surfaces on the two adjacent first sub-tube shafts respectively abut against the two sides of the second sub-tube shaft in the axial direction of the sub-tube shaft.

9. A wind turbine gearbox, characterized in that, Including the wind turbine gearbox tube shaft as described in any one of claims 1-8.

10. A wind turbine generator, characterized in that, Including the wind turbine gearbox as described in claim 9.

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