Wind turbine hub bottom seal structure

Abstract

The utility model provides a kind of wind driven generator hub bottom sealing structure, including hub, support pedestal and annular sealing plate, the bottom of hub is provided with opening;The bottom of support pedestal is located outside hub, the top of support pedestal is inserted into hub from opening, hub is supported on the top of support pedestal;Annular sealing plate is sleeved on support pedestal and is set at opening, the inner end and outer end of annular sealing plate are respectively sealed and connected support pedestal, hub.The annular sealing plate of the wind driven generator hub bottom sealing structure of the utility model is set at the opening of hub bottom, the inner end and outer end of annular sealing plate are respectively sealed and connected with support pedestal and hub, so as to seal the gap between hub and support pedestal by annular sealing plate.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a sealing structure at the bottom of a wind turbine hub. Background Technology

[0002] When transporting wind turbine hubs on deck barges, there is a certain probability that seawater will splash onto the products on the deck. When seawater splashes onto the bottom of the hub and enters the interior, it not only contaminates the internal environment of the hub but also accelerates the corrosion of electronic components installed inside, potentially causing them to malfunction. Therefore, structural seals must be installed at the opening at the bottom of the hub to ensure a tight seal and prevent seawater intrusion. Utility Model Content

[0003] The purpose of this utility model is to provide a sealing structure at the bottom of a wind turbine hub, which aims to ensure the sealing of the opening at the bottom of the wind turbine hub.

[0004] To solve the above-mentioned technical problems, the present invention provides a sealing structure for the bottom of a wind turbine hub, comprising:

[0005] A wheel hub, wherein an opening is provided at the bottom of the wheel hub;

[0006] A support base, the bottom of which is located outside the wheel hub, and the top of which extends into the wheel hub from the opening, with the wheel hub supported on the top of the support base;

[0007] An annular sealing plate is sleeved on the support base and disposed at the opening. The inner and outer ends of the annular sealing plate are respectively sealingly connected to the support base and the wheel hub.

[0008] In some embodiments, the annular sealing plate includes:

[0009] A rigid sealing plate is sleeved on the support base, and the inner end and outer end of the rigid sealing plate are respectively disposed on the support base and the wheel hub;

[0010] An inner end sealing portion extends along the inner end of the rigid sealing plate and is disposed between the inner end of the rigid sealing plate and the support base.

[0011] An outer end sealing portion extends along the outer end of the rigid sealing plate and is disposed between the outer end of the rigid sealing plate and the wheel hub.

[0012] In some embodiments, the inner end sealing portion is bonded to the rigid sealing plate.

[0013] In some embodiments, the inner end sealing portion is an inner end sealing gasket.

[0014] In some embodiments, the inner end of the rigid sealing plate is provided with an inner annular edge, the inner annular edge being horizontally opposite to the outer peripheral side of the support base, wherein:

[0015] The inner end sealing portion is disposed on the inner end annular edge; and / or

[0016] The inner annular edge is mounted on the support base by an inner screw.

[0017] In some embodiments, the inner end annular edge and the inner end sealing portion are provided with a first inner end through hole and a second inner end through hole for the inner end screw to pass through, and the first inner end through hole and the second inner end through hole are provided in multiples at intervals along the inner end annular edge.

[0018] In some embodiments, the outer end sealing portion is bonded to the rigid sealing plate.

[0019] In some embodiments, the outer end sealing portion is an outer end sealing gasket.

[0020] In some embodiments, the outer end of the rigid sealing plate is provided with an outer annular edge, the outer annular edge being vertically opposite to the bottom surface of the wheel hub, wherein:

[0021] The outer end sealing portion is disposed on the outer end annular edge; and / or

[0022] The outer annular edge is mounted on the wheel hub by an outer screw.

[0023] In some embodiments, the outer end annular edge and the outer end sealing portion are provided with a first outer end through hole and a second outer end through hole for the outer end screw to pass through, and the first outer end through hole and the second outer end through hole are provided in multiples at intervals along the outer end annular edge.

[0024] In some embodiments, the rigid sealing plate includes a tapered portion disposed between the inner end sealing portion and the outer end sealing portion, wherein one end of the tapered portion near the outer end sealing portion is located on the upper side of one end near the inner end sealing portion, and the tapered portion is gradually tapered inward from top to bottom.

[0025] In some embodiments, the shape of the outer end of the annular sealing plate is adapted to the shape of the opening, and the outer end of the annular sealing plate is circular.

[0026] In some embodiments, the shape of the inner end of the annular sealing plate is adapted to the shape of the bottom of the support base, and the inner end of the annular sealing plate is polygonal.

[0027] In some embodiments, the annular sealing plate is located on the underside of the hub.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The annular sealing plate of the bottom sealing structure of the wind turbine hub of this utility model is set at the opening at the bottom of the hub. The inner end and the outer end of the annular sealing plate are respectively sealed to the support base and the hub, thereby sealing the gap between the hub and the support base through the annular sealing plate. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the sealing structure at the bottom of the wind turbine hub in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A structural schematic diagram of the assembly of the center hub and the support base;

[0033] Figure 3 for Figure 2 A partial enlarged view of the components of the center hub and support base;

[0034] Figure 4 for Figure 1 A schematic diagram of the connection between the central annular sealing plate and the hub and support base;

[0035] Figure 5 for Figure 4 A schematic diagram of the connection between the center hub and the annular sealing plate;

[0036] Figure 6 for Figure 4 A schematic diagram of the connection between the central support base and the annular sealing plate;

[0037] Figure 7 for Figure 1 Schematic diagram of the structure of the middle annular sealing plate;

[0038] Figure 8 for Figure 7 A schematic diagram of the structure of the central sector-shaped splicing section.

[0039] Explanation of reference numerals in the accompanying drawings of this utility model:

[0040] The wind turbine hub bottom sealing structure 100 includes a hub 1, an opening 11, a support base 2, an annular sealing plate 3, a rigid sealing plate body 31, an inner annular edge 311, a first inner through hole 312, an outer annular edge 313, a first outer through hole 314, a tapered section 315, a fan-shaped splicing section 316, a mating flange section 317, an inner sealing section 32, an inner sealing gasket 32a, a second inner through hole 321, an outer sealing section 33, an outer sealing gasket 33a, a second outer through hole 331, an inner screw 4a, an outer screw 4b, a connecting screw 4c, and a gap of 200.

[0041] 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

[0042] 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.

[0043] 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.

[0044] 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 indicated technical features. Therefore, features 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. If 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.

[0045] This invention provides a sealing structure for the bottom of a wind turbine hub, which can be used in wind turbines. Figures 1 to 8 A preferred embodiment of the sealing structure at the bottom of the wind turbine hub provided by this utility model is shown.

[0046] Please see Figures 1 to 3 In some embodiments, the bottom sealing structure 100 of the wind turbine hub includes a hub 1, a support base 2, and an annular sealing plate 3. The bottom of the hub 1 is provided with an opening 11. The bottom of the support base 2 is located outside the hub 1, and the top of the support base 2 extends into the hub 1 from the opening 11. The hub 1 is supported on the top of the support base 2. The annular sealing plate 3 is sleeved on the support base 2 and is provided at the opening 11. The inner end and the outer end of the annular sealing plate 3 respectively seal and connect the support base 2 and the hub 1.

[0047] Specifically, the bottom of the hub 1 has a downward-facing opening 11, which is typically circular. The top of the support base 2 extends upward into the hub 1 from the opening 11, and the top of the support base 2 provides support to the hub 1 from the inside. The bottom of the support base 2 is located outside and below the hub 1, so that the hub 1 can be supported by the support base 2 during transportation. A gap 200 is formed between the outer peripheral side of the support base 2 and the inner surface of the opening 11, and the gap 200 is arranged in a ring shape extending circumferentially along the opening 11.

[0048] An annular sealing plate 3 is disposed between the hub 1 and the support base 2. The annular sealing plate 3 can seal the gap 200 between the hub 1 and the support base 2, so that the bottom sealing structure 100 of the wind turbine hub can be used as a solution for product scenarios such as seawater splashing or even impacting the product on the deck barge of a marine vessel.

[0049] At least one of the hub 1 and the support base 2 is fixedly connected to the annular sealing plate 3 to fix the annular sealing plate 3 at the opening 11 of the hub 1. The annular sealing plate 3 may be located inside the opening 11; the annular sealing plate 3 may also be located outside the opening 11, that is, the annular sealing plate 3 is located on the lower side of the hub 1; the annular sealing plate 3 may also be partially located inside the opening 11 and the remaining part located outside the opening 11. Optionally, please refer to... Figure 1 and Figure 2 In some embodiments, the annular sealing plate 3 is located on the underside of the hub 1. Positioning the annular sealing plate 3 outside the hub 1 makes its installation more convenient. The following description uses the example of the annular sealing plate 3 being located on the underside of the hub 1.

[0050] The outer end of the annular sealing plate 3 is sealed to the hub 1. The shape of the outer end of the annular sealing plate 3 is usually adapted to the shape of the opening 11. For example, the shape of the outer end of the annular sealing plate 3 and the shape of the opening 11 can be circular or square, etc. Optionally, please refer to Figure 1 , Figure 2 and Figure 7In some embodiments, the outer end of the annular sealing plate 3 is circular. The following description will take the circular outer end of the annular sealing plate 3 as an example.

[0051] The inner end of the annular sealing plate 3 is sealed to the bottom of the support base 2. The shape of the inner end of the annular sealing plate 3 is typically adapted to the shape of the bottom of the support base 2; for example, the shape of the inner end of the annular sealing plate 3 and the shape of the bottom of the support base 2 can be circular or polygonal. Optionally, please refer to... Figure 1 , Figure 2 and Figure 7 In some embodiments, the inner end of the annular sealing plate 3 is polygonal. The following will describe the case where the inner end of the annular sealing plate 3 is hexagonal.

[0052] The annular sealing plate 3 of the bottom sealing structure 100 of the wind turbine hub of this utility model is set at the opening 11 at the bottom of the hub 1. The inner end and the outer end of the annular sealing plate 3 are respectively sealed to the support base 2 and the hub 1, thereby sealing the gap 200 between the hub 1 and the support base 2 through the annular sealing plate 3.

[0053] The specific design of the annular sealing plate 3 can be set according to actual conditions. Optionally, please refer to [link / reference needed]. Figure 1 , Figures 4 to 7 In some embodiments, the annular sealing plate 3 includes a rigid sealing plate body 31, an inner end sealing portion 32, and an outer end sealing portion 33. The rigid sealing plate body 31 is sleeved on the support base 2, and the inner end and outer end of the rigid sealing plate body 31 are respectively disposed on the support base 2 and the hub 1. The inner end sealing portion 32 extends along the inner end of the rigid sealing plate body 31 and is disposed between the inner end of the rigid sealing plate body 31 and the support base 2. The outer end sealing portion 33 extends along the outer end of the rigid sealing plate body 31 and is disposed between the outer end of the rigid sealing plate body 31 and the hub 1.

[0054] Specifically, the annular sealing plate 3 comprises a rigid sealing plate body 31, an inner sealing portion 32, and an outer sealing portion 33. The outer end of the rigid sealing plate body 31 is circular, and the inner end is hexagonal. The rigid sealing plate body 31 is a rigid sealing plate made of a rigid material, which improves the overall structural strength of the annular sealing plate 3. The specific material of the rigid sealing plate body 31 can be set according to actual conditions; for example, the rigid sealing plate body 31 can be a plastic plate, a wooden plate, or a metal plate. Optionally, in some embodiments, the rigid sealing plate body 31 is an ABS plate made of ABS plastic.

[0055] An inner end sealing portion 32 is provided between the inner end of the rigid sealing plate 31 and the bottom of the support base 2, so that the inner end of the rigid sealing plate 31 and the bottom of the support base 2 are sealed together by the inner end sealing portion 32. The inner end sealing portion 32 can be a sealing gasket, sealing ring, or sealant, etc. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the inner end sealing portion 32 is an inner end sealing gasket 32a. Setting the inner end sealing portion 32 as a hexagonal inner end sealing gasket 32a helps ensure the sealing effect between the rigid sealing plate 31 and the support base 2. The following description will use an inner end sealing portion 32 with an inner end sealing gasket 32a as an example. The inner end sealing gasket 32a is typically made of rubber; for example, it can be an EPDM rubber gasket.

[0056] An outer end sealing portion 33 is provided between the outer end of the rigid sealing plate 31 and the wheel hub 1, so that the outer end of the rigid sealing plate 31 and the wheel hub 1 are sealed together by the outer end sealing portion 33. The outer end sealing portion 33 can be a sealing gasket, sealing ring, or sealant, etc. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the outer end sealing portion 33 is an outer end sealing gasket 33a. Setting the outer end sealing portion 33 as a circular outer end sealing gasket 33a helps ensure the sealing effect between the rigid sealing plate 31 and the hub 1. The following description will use the outer end sealing portion 33 as an example of an outer end sealing gasket 33a. The outer end sealing gasket 33a is typically made of rubber; for example, it can be an EPDM rubber gasket.

[0057] The inner end sealing part 32 is disposed at the inner end of the rigid sealing plate 31. The inner end sealing part 32 can be fixedly disposed on the rigid sealing plate 31 by means of adhesive bonding or snap-fit ​​fixing. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the inner end sealing portion 32 is bonded to the rigid sealing plate 31.

[0058] Specifically, the inner end sealing part 32 is fixed to the rigid sealing plate 31 by adhesive, and this method of fixing the inner end sealing part 32 to the rigid sealing plate 31 is relatively simple.

[0059] The inner end of the rigid sealing plate 31 is fixedly mounted on the support base 2. The specific shape and style of the inner end of the rigid sealing plate 31 can be set according to the actual situation. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the inner end of the rigid sealing plate 31 is provided with an inner annular edge 311, which is horizontally opposite to the outer peripheral side of the support base 2.

[0060] Specifically, the inner end of the rigid sealing plate 31 is flipped downwards to form an inner annular edge 311. The shape of the inner annular edge 311 is adapted to the shape of the outer peripheral side of the bottom of the support base 2, so that the inner annular edge 311 can fit against the outer peripheral side of the bottom of the support base 2. The following will describe the case where the inner end of the rigid sealing plate 31 is provided with an inner annular edge 311 as an example.

[0061] The specific fixing method between the inner annular edge 311 and the support base 2 can be set according to the actual situation. Optionally, please refer to [the relevant documentation]. Figure 1 , Figures 4 to 7 In some embodiments, the inner annular edge 311 is mounted on the support base 2 by an inner screw 4a.

[0062] Specifically, the inner annular edge 311 of the rigid sealing plate 31 is fixedly mounted on the support base 2 by an inner screw 4a. The inner annular edge 311 has a first inner through hole 312 through which the tail of the inner screw 4a passes. The support base 2 has screw mounting holes that mate with the inner screw 4a. This method of fixing the inner end of the rigid sealing plate 31 to the support base 2 using the inner screw 4a makes the assembly and disassembly of the annular sealing plate 31 and the support base 2 easier and more convenient. Typically, multiple inner screws 4a are spaced apart along the inner end of the rigid sealing plate 31, corresponding to multiple first inner through holes 312 on the rigid sealing plate 31.

[0063] The specific location of the inner sealing part 32 on the rigid sealing plate 31 can be set according to the actual situation. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the inner end sealing part 32 is disposed on the inner end annular edge 311. The inner end sealing part 32 can be fixedly disposed on the surface of the inner end annular edge 311 near the support base 2 by means of bonding or other methods.

[0064] The inner end sealing part 32 is disposed on the inner end annular edge 311. The inner end sealing part 32 may be located on the side of the plurality of first inner end through holes 312 near the opening 11; the inner end sealing part 32 may also be located on the side of the plurality of first inner end through holes 312 away from the opening 11; the inner end sealing part 32 may also cover the plurality of first inner end through holes 312. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the inner end annular edge 311 and the inner end sealing part 32 are provided with a first inner end through hole 312 and a second inner end through hole 321 for the inner end screw 4a to pass through. The first inner end through hole 312 and the second inner end through hole 321 are provided in multiples along the inner end annular edge 311.

[0065] Specifically, the inner end sealing part 32 covers the area on the inner end annular edge 311 where multiple first inner end through holes 312 are provided. In this way, the inner end screws 4a that fix the rigid sealing plate 31 and the support base 2 will also pass through the inner end sealing part 32, so that the inner end screws 4a can apply sufficient clamping force to the inner end sealing part 32, thereby ensuring that the inner end sealing part 32 can achieve a good sealing effect.

[0066] The outer end sealing part 33 is disposed at the outer end of the rigid sealing plate 31. The outer end sealing part 33 can be fixedly disposed on the rigid sealing plate 31 by means of adhesive bonding or snap-fit ​​fixing. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the outer end sealing portion 33 is bonded to the rigid sealing plate 31.

[0067] Specifically, the outer end sealing part 33 is fixed to the rigid sealing plate 31 by adhesive, and this method of fixing the outer end sealing part 33 to the rigid sealing plate 31 is relatively simple.

[0068] The outer end of the rigid sealing plate 31 is fixedly mounted on the support base 2. The specific shape and style of the outer end of the rigid sealing plate 31 can be set according to the actual situation. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the outer end of the rigid sealing plate 31 is provided with an outer annular edge 313, which is vertically opposite to the bottom surface of the hub 1.

[0069] Specifically, the outer end of the rigid sealing plate 31 is turned outward to form an outer annular edge 313, which can fit together with the bottom surface of the hub 1. The following description will take the example of the rigid sealing plate 31 having an outer annular edge 313 at its outer end.

[0070] The specific fixing method between the outer annular edge 313 and the wheel hub 1 can be set according to the actual situation. Optionally, please refer to [link / reference needed]. Figure 1 , Figures 4 to 7 In some embodiments, the outer annular edge 313 is mounted on the hub 1 by an outer screw 4b.

[0071] Specifically, the outer annular edge 313 of the rigid sealing plate 31 is fixed to the bottom surface of the hub 1 by an outer screw 4b. The outer annular edge 313 has a first outer through hole 314 through which the tail of the outer screw 4b passes. The hub 1 has a screw mounting hole that mates with the outer screw 4b. This method of fixing the outer end of the rigid sealing plate 31 to the hub 1 by the outer screw 4b makes the disassembly and assembly of the annular sealing plate 3 and the hub 1 easier and more convenient. Typically, multiple outer screws 4b are spaced along the outer end of the rigid sealing plate 31, and correspondingly, multiple first outer through holes 314 are provided on the rigid sealing plate 31.

[0072] The specific location of the outer sealing part 33 on the rigid sealing plate 31 can be set according to the actual situation. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the outer end sealing part 33 is disposed on the outer end annular edge 313. The outer end sealing part 33 can be fixedly disposed on the upper surface of the outer end annular edge 313 by means of bonding or the like.

[0073] The outer end sealing part 33 is disposed on the outer end annular edge 313. The outer end sealing part 33 may be located on the side of the plurality of first outer end through holes 314 near the opening 11; the outer end sealing part 33 may also be located on the side of the plurality of first outer end through holes 314 away from the opening 11; the outer end sealing part 33 may also cover the plurality of first outer end through holes 314. Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the outer end annular edge 313 and the outer end sealing part 33 are provided with a first outer end through hole 314 and a second outer end through hole 331 for the outer end screw 4b to pass through. The first outer end through hole 314 and the second outer end through hole 331 are provided in multiples along the outer end annular edge 313 at intervals.

[0074] Specifically, the outer end sealing part 33 covers the area on the outer end annular edge 313 where multiple first outer end through holes 314 are provided. In this way, the outer end screw 4b that fixes the hard sealing plate 31 and the hub 1 will also pass through the outer end sealing part 33, so that the outer end screw 4b can apply sufficient clamping force to the outer end sealing part 33, thereby ensuring that the outer end sealing part 33 can achieve a good sealing effect.

[0075] Optionally, please refer to Figure 1 , Figures 4 to 7 In some embodiments, the rigid sealing plate 31 includes a tapered portion 315 disposed between the inner end sealing portion 32 and the outer end sealing portion 33. The end of the tapered portion 315 near the outer end sealing portion 33 is located on the upper side of the end near the inner end sealing portion 32, and the tapered portion 315 is gradually tapered inward from top to bottom.

[0076] Specifically, the tapered portion 315 is disposed between the inner annular edge 311 and the outer annular edge 313. The upper and lower ends of the tapered portion 315 are respectively connected to the outer annular edge 313 and the inner annular edge 311. The tapered portion 315 is gradually tapered inward from top to bottom to create a height difference between the outer annular edge 313 and the inner annular edge 311. The outer annular edge 313 is located on the upper side of the inner annular edge 311.

[0077] The rigid sealing plate 31 can be a single piece; alternatively, it can be assembled from multiple components. See also... Figure 1 , Figure 7 and Figure 8 In some embodiments, the rigid sealing plate 31 includes a plurality of fan-shaped splicing parts 316, which are spliced ​​together along the circumference of the rigid sealing plate 31.

[0078] Specifically, the rigid sealing plate 31 can be divided into two, three, four, five, six, or more sector-shaped splicing portions 316 along its circumference. Multiple sector-shaped splicing portions 316 are spliced ​​together to form a complete rigid sealing plate 31, which reduces the processing difficulty of the rigid sealing plate 31. The following description will use a rigid sealing plate 31 comprising six sector-shaped splicing portions 316 as an example.

[0079] The specific fixing method between two adjacent sector-shaped splicing parts 316 can be set according to the actual situation. For example, two adjacent sector-shaped splicing parts 316 can be fixedly connected by screws, snap-fit, or welding. Optionally, please refer to Figure 1 , Figure 7 and Figure 8 In some embodiments, the fan-shaped splicing portion 316 is folded at both ends of the rigid sealing plate 31 in the circumferential direction to form two mating flange portions 317 in the direction away from the hub 1, and two adjacent fan-shaped splicing portions 316 are spliced ​​together through the mating flange portions 317.

[0080] Specifically, both ends of the fan-shaped splicing part 316 are folded downwards to form two mating flange parts 317. At the splicing point of two adjacent fan-shaped splicing parts 316, the two fan-shaped splicing parts 316 are close to each other and are fitted together. The two fan-shaped splicing parts 316 can be fixedly connected by means of connecting screws 4c, thereby realizing the fixed connection between two adjacent fan-shaped splicing parts 316. In this way, the mating flange parts 317 are set at both ends of each fan-shaped splicing part 316, making the fixed connection between two adjacent fan-shaped splicing parts 316 easier and better.

[0081] The bottom sealing structure 100 of the wind turbine hub has the characteristics of low manufacturing cost, high installation and dismantling efficiency, and good protective effect. The bottom sealing structure 100 of the wind turbine hub has the following advantages:

[0082] 1. Simple and ingenious design, excellent sealing effect

[0083] 1.1 An outer sealing gasket 33a made of soft EPDM material is pasted at the contact position between the hard sealing plate 31 and the bottom of the wheel hub 1. This solves the sealing problem and avoids scratching the wheel hub 1. It is also fastened to the wheel hub 1 by the outer screw 4b, which effectively prevents the problem of poor sealing caused by transportation vibration and wave impact.

[0084] 1.2 The rigid sealing plate 31 and the support base 2 are fastened together by the inner end screw 4a. The connection position is opened with a waist-shaped hole (that is, the first inner end through hole 312 can be a waist-shaped hole) to effectively absorb manufacturing tolerances.

[0085] 2. Excellent performance

[0086] 2.1 The rigid sealing plate 31 made of ABS material has extremely high impact strength and rigidity, which can effectively resist mechanical stress. It is especially suitable for components that need to withstand large impact forces, and perfectly matches the transportation scenario of marine deck barges.

[0087] 2.2 ABS material is composed of acrylonitrile, butadiene and styrene, which gives the rigid sealing plate 31 excellent corrosion resistance, durability and high temperature resistance.

[0088] 2.3 The rigid sealing plate 31 is easy to injection mold, suitable for making products with complex structures. The high-precision mold can ensure the precise fit between the product and the metal terminals.

[0089] 3. Low production cost

[0090] 3.1 ABS sheets are easy to cut, drill, carve, bond and polish, suitable for a variety of processing techniques, and easy to process and manufacture;

[0091] 3.2. Mold vacuum forming facilitates mass production and reduces overall costs.

[0092] 4. Lightweight overall, easy and quick to install and operate.

[0093] 4.1 The weight of a single 316 fan-shaped splicing section is only 5.3kg, and no crane or other auxiliary operation is required during personnel handling and installation;

[0094] 4.2 The installation process only involves drilling and fixing screws, which is simple and quick.

[0095] 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 sealing structure for the bottom of a wind turbine hub, characterized in that, include: A wheel hub, wherein an opening is provided at the bottom of the wheel hub; A support base, the bottom of which is located outside the wheel hub, and the top of which extends into the wheel hub from the opening, with the wheel hub supported on the top of the support base; An annular sealing plate is sleeved on the support base and disposed at the opening. The inner and outer ends of the annular sealing plate are respectively sealingly connected to the support base and the wheel hub.

2. The sealing structure at the bottom of the wind turbine hub according to claim 1, characterized in that, The annular sealing plate includes: A rigid sealing plate is sleeved on the support base, and the inner end and outer end of the rigid sealing plate are respectively disposed on the support base and the wheel hub; An inner end sealing portion extends along the inner end of the rigid sealing plate and is disposed between the inner end of the rigid sealing plate and the support base. An outer end sealing portion extends along the outer end of the rigid sealing plate and is disposed between the outer end of the rigid sealing plate and the wheel hub.

3. The sealing structure at the bottom of the wind turbine hub according to claim 2, characterized in that, The inner end sealing part is bonded to the rigid sealing plate; and / or, the inner end sealing part is an inner end sealing gasket.

4. The sealing structure at the bottom of the wind turbine hub according to claim 2, characterized in that, The inner end of the rigid sealing plate is provided with an inner annular edge, which is horizontally opposite to the outer peripheral side of the support base, wherein: The inner end sealing portion is disposed on the inner end annular edge; and / or The inner annular edge is mounted on the support base by an inner screw.

5. The sealing structure at the bottom of the wind turbine hub according to claim 4, characterized in that, The inner end annular edge and the inner end sealing part are provided with a first inner end through hole and a second inner end through hole for the inner end screw to pass through. The first inner end through hole and the second inner end through hole are provided in multiple intervals along the inner end annular edge.

6. The sealing structure at the bottom of the wind turbine hub according to claim 2, characterized in that, The outer end sealing part is bonded to the rigid sealing plate; and / or, the outer end sealing part is an outer end sealing gasket.

7. The sealing structure at the bottom of the wind turbine hub according to claim 2, characterized in that, The outer end of the rigid sealing plate is provided with an outer annular edge, which is vertically opposite to the bottom surface of the wheel hub, wherein: The outer end sealing portion is disposed on the outer end annular edge; and / or The outer annular edge is mounted on the wheel hub by an outer screw.

8. The sealing structure at the bottom of the wind turbine hub according to claim 7, characterized in that, The outer end annular edge and the outer end sealing part are provided with a first outer end through hole and a second outer end through hole for the outer end screw to pass through. The first outer end through hole and the second outer end through hole are provided in multiple intervals along the outer end annular edge.

9. The sealing structure at the bottom of the wind turbine hub according to claim 2, characterized in that, The rigid sealing plate includes a tapered portion disposed between the inner end sealing portion and the outer end sealing portion. The end of the tapered portion near the outer end sealing portion is located on the upper side of the end near the inner end sealing portion, and the tapered portion is gradually tapered inward from top to bottom.

10. The sealing structure at the bottom of the wind turbine hub according to claim 1, characterized in that, The shape of the outer end of the annular sealing plate is adapted to the shape of the opening, and the outer end of the annular sealing plate is circular; and / or, The inner end of the annular sealing plate is shaped to match the bottom shape of the support base, and the inner end of the annular sealing plate is polygonal; and / or, The annular sealing plate is located on the underside of the hub.

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