Fan hub and wind generating set

Abstract

The utility model discloses a fan wheel hub and a wind generating set, the fan wheel hub comprises a wheel hub body, the wheel hub body is provided with a hole and a plurality of containing cavities, the containing cavities are arranged on the peripheral side of the hole in a surrounding mode, and the bottom of each containing cavity is provided with a threaded hole to be matched with a threaded piece; the sealing plate is used for sealing the hole, a plurality of first mounting holes are annularly formed in the sealing plate, and the first mounting holes are aligned to the threaded holes; the first step sleeve is provided with a through hole penetrating in the axial direction of the first step sleeve and comprises a rod part and a head part which are connected with each other, a limiting step is formed at the joint of the rod part and the head part, the diameter of the first mounting hole is larger than the outer diameter of the rod part and smaller than the outer diameter of the head part, and the rod part penetrates through the first mounting hole to be embedded in the containing cavity; the limiting step abuts against the sealing plate. The first threaded piece is in threaded connection with the threaded hole and presses the sealing plate on the hub body through the limiting step. The first stepped sleeve and the first threaded part can move in the first mounting hole, so that the first stepped sleeve and the first threaded part are not influenced by shearing force any more.

Description

Technical Field

[0001] The utility model relates to a fan hub and a wind turbine generator set. Background Art

[0002] The hub of a wind turbine is a spherical shell casting, a key component that converts wind energy into rotational mechanical energy. It is subject to constantly changing alternating loads from the blades. The hub has holes in it, and electrical equipment is installed inside. To ensure the safe operation of this electrical equipment, the holes in the hub are sealed with sealing plates to protect the equipment inside. Currently, with the increasing power output of individual wind turbines, the corresponding hub size and holes are also increasing. Due to the influence of alternating loads, the hub deforms more and more during operation. The bolts used to install the sealing plate often break under shear due to the influence of alternating loads and hub deformation. This can cause the sealing plate to fall into the hub and tumble with the rotation of the hub, damaging the electrical equipment and affecting the safe operation of the hub and even the entire machine. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the bolts used to install the sealing plate on the hub are easily broken due to the influence of alternating loads and hub deformation, and to provide a wind turbine hub and a wind turbine generator set.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A fan hub, comprising:

[0006] The hub body has a hole and a receiving cavity, wherein a plurality of the receiving cavities are arranged around the hole, and a threaded hole is provided at the bottom of each receiving cavity to accommodate a threaded member;

[0007] A sealing plate, used for sealing the hole, wherein a plurality of first mounting holes are arranged around the sealing plate, and the first mounting holes are aligned with the threaded holes;

[0008] A first stepped sleeve having a through hole extending along the axial direction of the first stepped sleeve, comprising a rod portion and a head portion connected to each other, a limiting step formed at the connection between the rod portion and the head portion, a diameter of the first mounting hole being larger than an outer diameter of the rod portion and smaller than an outer diameter of the head portion, the rod portion passing through the first mounting hole and embedded in the accommodating cavity, and the limiting step abutting against the sealing plate;

[0009] A first threaded member is passed through the through hole and is threadedly connected to the threaded hole. The first threaded member presses the sealing plate against the hub body through the limiting step.

[0010] In this solution, the rod of the first stepped sleeve of the wind turbine hub passes through the first mounting hole on the sealing plate and is embedded in the accommodating cavity on the hub body. The first threaded member passes through the through hole of the first stepped sleeve and is connected to the threaded hole on the hub body, pressing the sealing plate to the hub body. Since the diameter of the first mounting hole of the sealing plate is set to be larger than the rod diameter of the first stepped sleeve, even if the hub body is deformed, the first stepped sleeve can drive the first threaded member to move relative to the sealing plate in the first mounting hole. Therefore, the first threaded member is no longer affected by the shear force, thereby not causing the first threaded member to loosen or fall off, thereby improving reliability and avoiding the risk of the sealing plate falling due to bolt breakage, effectively ensuring the safe operation of the wind turbine generator set.

[0011] Preferably, the sealing plate comprises:

[0012] The plate body has a door opening and a second mounting hole, and a plurality of the second mounting holes are arranged around the circumference of the door opening;

[0013] a second stepped sleeve, embedded in the second mounting hole, wherein the diameter of the second mounting hole is larger than the outer diameter of the stem of the second stepped sleeve and smaller than the outer diameter of the head of the second stepped sleeve;

[0014] a hatch, used to seal the door opening;

[0015] A second threaded member is sequentially passed through the second mounting hole, the second stepped sleeve, the hatch and connected to a nut to mount the hatch on the plate body.

[0016] In this solution, the rod of the second stepped sleeve passes through the second mounting hole on the plate body, and the end of the rod abuts against the surface of the hatch. The second threaded member passes through the second stepped sleeve and the through hole on the hatch and is connected to the nut to install the hatch on the plate body. Since the diameter of the second mounting hole on the plate body is configured to be larger than the rod diameter of the second stepped sleeve, even if the plate body is deformed, the second stepped sleeve can drive the second threaded member to move relative to the plate body in the second mounting hole, so it will not be transmitted to the second threaded member through the second stepped sleeve, and the second threaded member will no longer be affected by the shear force, thereby not causing the second threaded member to loosen or fall off, thereby improving reliability.

[0017] Preferably, a first buffer layer is provided at a joint between the plate body and the hatch, and the first buffer layer is sandwiched between the plate body and the hatch.

[0018] In this embodiment, the first cushion layer facilitates the second screw member to press the panel body and the hatch door together. Furthermore, the first cushion layer can absorb shock and vibration, providing a buffering effect. Preferably, the first cushion layer is a foam rubber layer.

[0019] Preferably, the plate body includes more than two closing plates, and the two or more closing plates are spliced ​​to form the plate body, and the joints of adjacent closing plates are respectively provided with a third mounting hole and a fourth mounting hole, and the plate body also includes a third stepped sleeve and a third threaded member, the diameter of the third mounting hole is larger than the outer diameter of the rod of the third stepped sleeve and smaller than the outer diameter of the head of the third stepped sleeve, the rod of the third stepped sleeve is embedded in the third mounting hole and abuts against the surface of another closing plate, the fourth mounting hole is adapted to the third threaded member, and the third threaded member passes through the fourth mounting hole and the third stepped sleeve in sequence and is connected to the nut to connect adjacent closing plates.

[0020] In this solution, the plate body can be formed by splicing more than two closing plates. The rod of the third stepped sleeve passes through the third mounting hole on one closing plate, and the end of the rod abuts the surface of the other closing plate. The third threaded member passes through the fourth mounting hole on the closing plate and the third stepped sleeve is connected to the nut to connect the two adjacent closing plates. Since the diameter of the third mounting hole on the closing plate is configured to be larger than the rod diameter of the third stepped sleeve, even if deformation occurs between adjacent closing plates, the third stepped sleeve can drive the third threaded member to move in the third mounting hole, so the third threaded member is no longer affected by shear force, thereby not causing the third threaded member to loosen or fall off, thereby improving reliability.

[0021] Preferably, a second buffer layer is provided at the joint of two or more sealing plates, and the second buffer layer is sandwiched between adjacent sealing plates.

[0022] In this embodiment, the second cushion layer facilitates the third screw member to compress and secure the adjacent sealing plates. Furthermore, the second cushion layer can absorb shock and vibration, providing a buffering effect. Preferably, the second cushion layer is a foam rubber layer.

[0023] Preferably, among the adjacent sealing plates, a joint of one sealing plate has a bend, and the bend is used to accommodate a joint of another sealing plate.

[0024] In this solution, the above-mentioned structural setting is adopted to ensure that multiple cover plates can be installed on the same plane when assembled.

[0025] Preferably, the second stepped sleeve comprises a supporting sleeve and a washer, and the supporting sleeve and the washer are combined to form the stem and the head of the second stepped sleeve;

[0026] Alternatively, the third stepped sleeve includes a supporting sleeve and a washer, and the supporting sleeve and the washer are combined to form the rod and the head of the third stepped sleeve.

[0027] In this solution, the second stepped sleeve and the third stepped sleeve are both formed by a combination of a support sleeve and a gasket, which is easy to process and install, and can achieve the effect of an integrally arranged stepped sleeve.

[0028] Preferably, a third buffer layer is provided at the joint between the sealing plate and the hub body, and the third buffer layer is sandwiched between the sealing plate and the hub body.

[0029] In this solution, the third cushion layer is provided to facilitate the first threaded member to press and fix the sealing plate to the hub body. At the same time, the third cushion layer can also absorb shock and vibration, playing a buffering role.

[0030] Preferably, the first cushion layer, the second cushion layer and the third cushion layer are all foam rubber layers.

[0031] A wind turbine generator set comprises the wind turbine hub described above.

[0032] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0033] The positive progressive effect of the present invention is that the rod of the first stepped sleeve of the wind turbine hub passes through the first mounting hole on the sealing plate and is embedded in the accommodating cavity on the hub body, and the first threaded member passes through the through hole of the first stepped sleeve and is connected to the threaded hole on the hub body, pressing the sealing plate to the hub body. Since the diameter of the first mounting hole of the sealing plate is set to be larger than the rod diameter of the first stepped sleeve, even if the hub body is deformed, the first stepped sleeve can drive the first threaded member to move relative to the sealing plate in the first mounting hole, so the first threaded member is no longer affected by the shear force, thereby not causing the first threaded member to loosen or fall off, thereby improving reliability and avoiding the risk of the sealing plate falling off due to bolt breakage, effectively ensuring the safe operation of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of the sealing plate installed on the hub body in a preferred embodiment of the utility model Figure 1 .

[0035] Figure 2 This is a schematic diagram of the structure of the sealing plate installed on the hub body in a preferred embodiment of the utility model Figure 2 .

[0036] Figure 3 for Figure 2 Sectional view along line AA.

[0037] Figure 4 for Figure 3 Magnified view of part B.

[0038] Figure 5 for Figure 2 Cross-section along line CC.

[0039] Figure 6 This is a structural schematic diagram of a sealing plate according to a preferred embodiment of the present invention.

[0040] Description of reference numerals:

[0041] Hub body 1

[0042] Hole 11

[0043] Accommodating chamber 12

[0044] threaded hole 121

[0045] Sealing plate 2

[0046] First mounting hole 201

[0047] Board body 21

[0048] Doorway 211

[0049] Second mounting hole 212

[0050] Close plate 213

[0051] The third mounting hole 2131

[0052] Fourth mounting hole 2132

[0053] Bending 2133

[0054] Third step sleeve 214

[0055] Support sleeve 2141

[0056] Washer 2142

[0057] The third threaded member 215

[0058] Second stepped sleeve 22

[0059] Hatch 23

[0060] Second screw member 24

[0061] First step sleeve 3

[0062] Rod 31

[0063] Head 32

[0064] Limiting step 33

[0065] First threaded member 4 DETAILED DESCRIPTION

[0066] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0067] like Figures 1-6 As shown, this embodiment discloses a wind turbine hub, which includes a hub body 1, a sealing plate 2, a first stepped sleeve 3 and a first threaded member 4. The hub body 1 has a hole 11 and an accommodating cavity 12. A plurality of accommodating cavities 12 are arranged around the circumference of the hole 11. A threaded hole 121 is provided at the bottom of each accommodating cavity 12 to adapt to the first threaded member 4. The sealing plate 2 is used to seal the hole 11. A plurality of first mounting holes 201 are provided on the sealing plate 2. The first mounting holes 201 are aligned with the threaded holes 121. The first stepped sleeve 3 has a plurality of first mounting holes 201 along the first step. The sleeve 3 passes through a through hole in the axial direction, and the first stepped sleeve 3 includes a rod 31 and a head 32 connected to each other. A limiting step 33 is formed at the connection between the rod 31 and the head 32. The diameter of the first mounting hole 201 is larger than the outer diameter of the rod 31 and smaller than the outer diameter of the head 32. The rod 31 passes through the first mounting hole 201 and is embedded in the accommodating cavity 12. The limiting step 33 abuts against the sealing plate 2. The first threaded member 4 passes through the through hole of the first stepped sleeve 3 and is threadedly connected to the threaded hole 121. The first threaded member 4 presses the sealing plate 2 to the hub body 1 through the limiting step 33.

[0068] like Figures 1-6 As shown, in this embodiment, the rod portion 31 of the first stepped sleeve 3 of the wind turbine hub passes through the first mounting hole 201 on the sealing plate 2 and is embedded in the accommodating cavity 12 on the hub body 1, and the first threaded member 4 passes through the through hole of the first stepped sleeve 3 and is connected to the threaded hole 121 on the hub body 1, pressing the sealing plate 2 to the hub body 1. Since the diameter of the first mounting hole 201 of the sealing plate 2 is set to be larger than the diameter of the rod portion 31 of the first stepped sleeve 3, even if the hub body 1 is deformed, the first stepped sleeve 3 can drive the first threaded member 4 to move relative to the sealing plate 2 in the first mounting hole 201, so that the first threaded member 4 is no longer affected by the shear force, thereby not causing the first threaded member 4 to loosen or fall off, thereby improving reliability and avoiding the risk of the sealing plate 2 falling due to bolt breakage, effectively ensuring the safe operation of the wind turbine generator set.

[0069] Preferably, a third cushioning layer is provided at the junction between the sealing plate 2 and the hub body 1. The third cushioning layer is sandwiched between the sealing plate 2 and the hub body 1. The provision of the third cushioning layer facilitates the first threaded member 4 to compress and secure the sealing plate 2 to the hub body 1. Furthermore, the third cushioning layer can absorb shock and vibration, providing a cushioning effect. Preferably, the third cushioning layer is a foam layer, but a rubber layer is also acceptable.

[0070] like Figure 1 、 Figure 2 and Figure 6 As shown, in this embodiment, the sealing plate 2 includes a plate body 21, a second stepped sleeve 22, a hatch 23 and a second threaded member 24. The plate body 21 has a door hole 211 and a second mounting hole 212. Several second mounting holes 212 are arranged around the circumference of the door hole 211. The second stepped sleeve 22 is embedded in the second mounting hole 212. The diameter of the second mounting hole 212 is larger than the outer diameter of the rod of the second stepped sleeve 22 and smaller than the outer diameter of the head of the second stepped sleeve 22. The hatch 23 is used to seal the door hole 211. The second threaded member 24 passes through the second mounting hole 212, the second stepped sleeve 22 and the hatch 23 in sequence and is connected to the nut to install the hatch 23 on the plate body 21. The rod of the second stepped sleeve 22 passes through the second mounting hole 212 in the plate body 21, and the end of the rod abuts the surface of the hatch 23. The second threaded member 24 passes through the second stepped sleeve 22 and a through hole (not shown) in the hatch 23 and is connected to a nut, thereby mounting the hatch 23 on the plate body 21. Because the diameter of the second mounting hole 212 in the plate body 21 is configured to be larger than the diameter of the rod of the second stepped sleeve 22, even if the plate body 21 deforms, the second stepped sleeve 22 can drive the second threaded member 24 to move within the second mounting hole 212. Therefore, the second threaded member 24 is no longer affected by shear forces, thereby preventing the second threaded member 24 from loosening or falling off, thereby improving reliability.

[0071] like Figure 1 and Figure 2 As shown, a first cushioning layer is provided at the junction of the panel body 21 and the hatch 23. This first cushioning layer is sandwiched between the panel body 21 and the hatch 23, facilitating the second screw member 24 to press the panel body 21 and the hatch 23 together. Furthermore, the first cushioning layer can absorb shock and vibration, providing a cushioning effect. Preferably, the first cushioning layer is a foam rubber layer.

[0072] like Figure 1 、 Figure 2 and Figure 5As shown, in this embodiment, the plate body 21 includes three closing plates 213, which are spliced ​​end to end to form the plate body 21. The joints of adjacent closing plates 213 are respectively provided with a third mounting hole 2131 and a fourth mounting hole 2132. The plate body 21 also includes a third stepped sleeve 214 and a third threaded member 215. The diameter of the third mounting hole 2131 is larger than the outer diameter of the rod of the third stepped sleeve 214 and smaller than the outer diameter of the head of the third stepped sleeve 214. The rod of the third stepped sleeve 214 is embedded in the third mounting hole 2131 and abuts against the surface of another closing plate 213. The fourth mounting hole 2132 is adapted to the third threaded member 215. The third threaded member 215 passes through the fourth mounting hole 2132 and the third stepped sleeve 214 in sequence and is connected to the nut to connect adjacent closing plates 213. In other alternative embodiments, the plate body can be formed by splicing more than two closing plates.

[0073] like Figure 5 As shown, the rod of the third stepped sleeve 214 passes through the third mounting hole 2131 on one sealing plate 213, and the end of the rod abuts the surface of the other sealing plate 213. The third threaded member 215 passes through the fourth mounting hole 2132 on the sealing plate 213, and the third stepped sleeve 214 is connected to the nut to connect the two adjacent sealing plates 213. Since the diameter of the third mounting hole 2131 on the sealing plate 213 is configured to be larger than the rod diameter of the third stepped sleeve 214, even if deformation occurs between adjacent sealing plates 213, the third stepped sleeve 214 can drive the third threaded member 215 to move within the third mounting hole 2131. Therefore, the third threaded member 215 is no longer affected by shear force, thereby preventing the third threaded member 215 from loosening or falling off, thereby improving reliability.

[0074] like Figure 5 As shown, the third stepped sleeve 214 includes a support sleeve 2141 and a washer 2142, which together form the stem and head of the third stepped sleeve 214. The third stepped sleeve 214 is formed by the support sleeve 2141 and the washer 2142, which facilitates processing and installation and can achieve the same function as an integral stepped sleeve.

[0075] Of course, in an alternative embodiment, the first stepped sleeve, the second stepped sleeve and the third stepped sleeve may be provided integrally, or may be provided with a support sleeve and a washer combined to form the rod portion and the head portion of the stepped sleeve.

[0076] In this embodiment, a second cushioning layer is provided at the joints of two or more sealing plates 213. The second cushioning layer is sandwiched between adjacent sealing plates 213 to facilitate the third screw member 215 to press and secure the adjacent sealing plates 213. Furthermore, the second cushioning layer can absorb shock and vibration, providing a cushioning effect. Preferably, the second cushioning layer is a foam rubber layer.

[0077] like Figure 5 and Figure 6 As shown, among adjacent sealing plates 213, a joint of one sealing plate 213 has a bend 2133, and the bend 2133 is used to accommodate the joint of another sealing plate 213, so that multiple sealing plates 213 can be installed on the same plane when assembled to reduce the volume.

[0078] In this embodiment, the first cushion layer, the second cushion layer and the third cushion layer are all foam rubber layers, so as to reduce the manufacturing cost.

[0079] In this embodiment, the stem portion 31 of the first stepped sleeve 3 must be adapted to the depth of the accommodating cavity 12 to ensure that the first stepped sleeve 3 exerts a moderate pressure on the sealing plate 2. If the pressure is too great, the sealing plate 2 cannot move relative to the hub body 1; if the pressure is too low, the sealing plate 2 may become loose. Similarly, when installing the second and third stepped sleeves, the issue of moderate pressure must be considered to eliminate stress and deformation.

[0080] In this embodiment, the first threaded member, the second threaded member, and the third threaded member may all be configured as bolts, or a combination of a stud and a nut.

[0081] This embodiment also discloses a wind turbine generator set, which includes the wind turbine hub described above.

[0082] In the description of this article, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0083] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A fan hub, characterized in that: It includes: The hub body has a hole and a receiving cavity, wherein a plurality of the receiving cavities are arranged around the circumference of the hole, and a threaded hole is provided at the bottom of each receiving cavity to accommodate a threaded member; A sealing plate, used for sealing the hole, wherein a plurality of first mounting holes are arranged around the sealing plate, and the first mounting holes are aligned with the threaded holes; A first stepped sleeve having a through hole extending along the axial direction of the first stepped sleeve, comprising a rod portion and a head portion connected to each other, a limiting step formed at the connection between the rod portion and the head portion, a diameter of the first mounting hole being larger than an outer diameter of the rod portion and smaller than an outer diameter of the head portion, the rod portion passing through the first mounting hole and embedded in the accommodating cavity, and the limiting step abutting against the sealing plate; A first threaded member is passed through the through hole and is threadedly connected to the threaded hole. The first threaded member presses the sealing plate against the hub body through the limiting step.

2. The fan hub according to claim 1, characterized in that: The sealing plate comprises: The plate body has a door opening and a second mounting hole, and a plurality of the second mounting holes are arranged around the door opening; a second stepped sleeve, embedded in the second mounting hole, wherein the diameter of the second mounting hole is larger than the outer diameter of the stem of the second stepped sleeve and smaller than the outer diameter of the head of the second stepped sleeve; a hatch, used to seal the door opening; A second threaded member is sequentially passed through the second mounting hole, the second stepped sleeve, the hatch and connected to a nut to mount the hatch on the plate body.

3. The fan hub according to claim 2, characterized in that: A first buffer layer is provided at a joint portion between the plate body and the hatch, and the first buffer layer is sandwiched between the plate body and the hatch.

4. The fan hub according to claim 3, characterized in that: The plate body includes more than two sealing plates, and the two or more sealing plates are spliced ​​to form the plate body. The joints of adjacent sealing plates are respectively provided with a third mounting hole and a fourth mounting hole. The plate body also includes a third stepped sleeve and a third threaded member. The diameter of the third mounting hole is larger than the outer diameter of the rod of the third stepped sleeve and smaller than the outer diameter of the head of the third stepped sleeve. The rod of the third stepped sleeve is embedded in the third mounting hole and abuts against the surface of another sealing plate. The fourth mounting hole is adapted to the third threaded member. The third threaded member passes through the fourth mounting hole and the third stepped sleeve in sequence and is connected to the nut to connect adjacent sealing plates.

5. The fan hub according to claim 4, characterized in that: A second buffer layer is provided at the joint of two or more sealing plates, and the second buffer layer is sandwiched between the adjacent sealing plates.

6. The fan hub according to claim 4, characterized in that: Among the adjacent sealing plates, a joint of one sealing plate has a bend, and the bend is used to accommodate the joint of another sealing plate.

7. The fan hub according to claim 4, wherein: The second stepped sleeve includes a supporting sleeve and a washer, wherein the supporting sleeve and the washer are combined to form a stem and a head of the second stepped sleeve; Alternatively, the third stepped sleeve includes a supporting sleeve and a washer, and the supporting sleeve and the washer are combined to form the rod and the head of the third stepped sleeve.

8. The fan hub according to claim 5, wherein: A third buffer layer is provided at a joint portion between the sealing plate and the hub body, and the third buffer layer is sandwiched between the sealing plate and the hub body.

9. The fan hub according to claim 8, characterized in that: The first cushion layer, the second cushion layer and the third cushion layer are all foam rubber layers.

10. A wind turbine generator set, characterized in that: The wind turbine generator set includes the wind turbine hub according to any one of claims 1 to 9.

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