Wind power hub and wind generating set

Abstract

The wind power hub comprises a hub body and threaded sleeves, the hub body is provided with a flange face, a plurality of mounting holes are annularly formed in the flange face, the threaded sleeves are embedded in the mounting holes, the material hardness of the threaded sleeves is larger than that of the hub body, the threaded sleeves are provided with internal threads, and the internal threads are arranged in the threaded sleeves. The threaded sleeve is used for being connected with an external assembly through a threaded piece. According to the wind power hub, the thread sleeves with the hardness larger than that of the hub body are embedded in the mounting holes, the threaded pieces are connected to the hub through the thread sleeves, the thread sleeves can eliminate the thread pitch and thread form deviation between the threaded pieces and the mounting holes, loads are evenly distributed, the strength of threaded connection is improved, and the bearing capacity and fatigue resistance of threaded connection are improved; the threaded sleeve can play a buffering role between the threaded piece and the hub body, impact is reduced, internal threads of the threaded sleeve and internal threads of the mounting hole are prevented from being damaged, and therefore safe operation of a unit is guaranteed, the service life of the hub is prolonged, and economic benefits are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of wind power hub and wind generating set. BACKGROUND

[0002] The flange surface of wind power hub is used to install variable pitch bearing and main shaft, and its connection mode with variable pitch bearing and main shaft is bolt connection. Threaded hole is provided on the hub, and bolt is screwed in threaded hole when installing bearing or main shaft, and torque is tightened. With the continuous increase of fan capacity and fan blade, external load transmitted to bolt is also increasing, and pre-tightening force exerted on bolt is also increasing, and correspondingly, the thread in threaded hole of hub also bears greater tension. Since the hub is ductile iron casting, the material hardness is relatively low, which limits the allowable load capacity of its thread, and after the tension borne by bolt is overloaded, the thread in threaded hole is often damaged, and bolt is pulled out and falls off. SUMMARY

[0003] The technical problem to be solved by the utility model is that the thread of the hub in the prior art is easily damaged, and a wind power hub and wind generating set are provided.

[0004] The utility model solves the above technical problem by the following technical scheme:

[0005] A wind power hub comprises a hub body and a screw sleeve, the hub body has a flange surface, a plurality of mounting holes are annularly arranged on the flange surface, the screw sleeve is embedded in the mounting hole, the material hardness of the screw sleeve is greater than that of the hub body, the screw sleeve has internal threads, and the screw sleeve is used to be connected with an external component through a threaded part.

[0006] In the scheme, the wind power hub is embedded with a screw sleeve with greater hardness than the hub body in the mounting hole, the threaded part is connected to the hub through the screw sleeve, the screw sleeve can eliminate the pitch and tooth profile deviation between the threaded part and the mounting hole, make the load distribution uniform, improve the strength of threaded connection, increase the bearing capacity and fatigue resistance of threaded connection, at the same time, the screw sleeve can play a buffering role between the threaded part and the hub body, reduce impact and vibration, prevent the internal threads of the screw sleeve and the internal threads of the mounting hole from being damaged, so that the hub body can bear greater load, improve the reliability of threaded connection, ensure that the threaded connection is effective in long service life, thereby ensuring the safe operation of the unit, prolonging the service life of the hub and improving economic benefits.

[0007] In addition, the screw sleeve can prevent the thread from loosening or being damaged, and can also prolong the service life of the mounting hole.

[0008] Preferably, the screw sleeve comprises a steel wire screw sleeve.

[0009] In the scheme, the structure is adopted, the manufacturing process is simplified, and the processing of the screw sleeve is facilitated.

[0010] Preferably, the material of the steel wire screw sleeve comprises stainless steel.

[0011] In the scheme, the screw sleeve made of stainless steel has high strength and large hardness, can withstand large external force and load, and ensures the stability and durability of the product. The screw sleeve made of stainless steel also has excellent corrosion resistance, can effectively resist the corrosion of various chemicals, and ensures that the material is not easy to rust for a long time. At the same time, the screw sleeve made of stainless steel also has excellent high-temperature resistance, can maintain stable form even in high-temperature environment, is not easy to deform, and improves safety. In addition, the surface of the stainless steel material is smooth and not easy to adhere to dirt, which is extremely convenient to clean.

[0012] Preferably, the material of the hub body comprises nodular cast iron.

[0013] In the scheme, the material of the hub body is nodular cast iron, which is convenient for manufacturing the hub body by casting and processing the hub body.

[0014] Preferably, the height of the screw sleeve is less than the depth of the mounting hole, so that the upper edge of the screw sleeve is lower than the flange surface.

[0015] In the scheme, the structure is adopted, the screw sleeve is prevented from protruding from the flange surface of the hub, and the flange plate is facilitated to be installed later. When the threaded part connects and pre-tightens the screw sleeve, the screw sleeve does not interfere with the components on the flange surface, and does not affect the connection effect of the threaded part.

[0016] Preferably, the depth of the mounting hole is greater than the internal thread depth of the mounting hole, and the internal thread depth is greater than the height of the screw sleeve.

[0017] In the scheme, the structure is adopted, the screw sleeve is facilitated to be installed, and the connection effect of the screw sleeve is improved.

[0018] Preferably, the screw sleeve is threadedly connected to the mounting hole of the hub body.

[0019] The screw sleeve and the mounting hole are detachably connected, and the screw sleeve comprises various internal threads to adapt to different threaded parts.

[0020] In the scheme, the structure is adopted, the screw sleeve is facilitated to be screwed into the mounting hole in a rotating manner, and the installation is simple and convenient. Of course, in other schemes, a plurality of buckles are arranged on the outer circumferential surface of the screw sleeve, and the screw sleeve is connected to the hub through the plurality of buckles.

[0021] A wind turbine generator set comprises a wind power hub as described above.

[0022] Preferably, the wind turbine further comprises a flange plate, which is mounted on the flange surface, and a plurality of through holes are arranged on the flange plate, the through holes are arranged corresponding to the mounting holes, and the inner diameter of the through holes is greater than or equal to the inner diameter of the mounting holes.

[0023] In this scheme, the screw sleeve can be exposed through the through holes on the flange plate, and the threaded part is convenient to connect.

[0024] Preferably, the wind turbine further comprises a pitch bearing, a stud bolt and a nut, one end of the stud bolt is screwed with the nut, and the other end of the stud bolt is screwed to the screw sleeve of the wind turbine hub through the pitch bearing.

[0025] In this scheme, the pitch bearing is mounted on the wind turbine hub through the stud bolt and the nut, and the pitch bearing can bear a larger load due to the stud bolt connected in the screw sleeve, and the connection between the pitch bearing and the wind turbine hub will not be invalid, so that the threaded part is effective in a long service life, thereby ensuring the safe operation of the wind turbine. The stud bolt and the nut are matched, and the pre-tightening force of the stud bolt can be adjusted by screwing the nut during installation and maintenance, without screwing the stud bolt.

[0026] Preferably, the wind turbine further comprises a main shaft, a stud bolt and a nut, one end of the stud bolt is screwed with the nut, and the other end of the stud bolt is screwed to the screw sleeve of the wind turbine hub through the main shaft.

[0027] In this scheme, the main shaft is mounted on the wind turbine hub through the stud bolt and the nut, and the main shaft can bear a larger load due to the stud bolt connected in the screw sleeve, so that the threaded part is effective in a long service life, thereby ensuring the safe operation of the wind turbine. The stud bolt and the nut are matched, and the pre-tightening force of the stud bolt can be adjusted by screwing the nut during installation and maintenance, without screwing the stud bolt.

[0028] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred embodiments of the present application are obtained.

[0029] The positive progress effect of the utility model lies in: the wind power hub is embedded with a screw sleeve with greater hardness than the hub body in the mounting hole, the threaded part is connected to the hub through the screw sleeve, the screw sleeve can eliminate the pitch and tooth type deviation between the threaded part and the mounting hole, make the load distribution uniform, improve the strength of threaded connection, increase the bearing capacity and fatigue strength of threaded connection, at the same time, the screw sleeve can play a buffering role between the threaded part and the hub body, reduce the impact and vibration, protect the internal thread of the screw sleeve and the internal thread of the mounting hole, so that the hub body can bear greater load, improve the reliability of threaded connection, ensure that the threaded part is connected effectively in a long service life, thereby guaranteeing the safe operation of the unit, prolonging the service life of the hub and improving the economic benefit. In addition, the screw sleeve can prevent the thread from loosening or damaging, and can also prolong the service life of the mounting hole. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a partial structure schematic view of the wind turbine generator set of a preferred embodiment of the utility model.

[0031] Figure 2 It is a structure schematic view of the hub of a preferred embodiment of the utility model.

[0032] Figure 3 It is a structure schematic view of the screw sleeve of a preferred embodiment of the utility model.

[0033] BRIEF DESCRIPTION OF DRAWINGS:

[0034] Hub body 1

[0035] Flange face 11

[0036] Mounting hole 111

[0037] Screw sleeve 2

[0038] Threaded part 3

[0039] Double-headed stud 31

[0040] Nut 32

[0041] Flange plate 4

[0042] Via hole 41

[0043] Variable pitch bearing 10 DETAILED DESCRIPTION

[0044] The utility model will be more clearly and completely explained below by way of embodiment and in combination with drawings, but it is not limited to the embodiment range of the utility model by the embodiment.

[0045] As Figures 1-3As shown, the embodiment discloses a wind power hub, which comprises a hub body 1 and a sleeve 2. The hub body 1 has a flange face 11, and a plurality of mounting holes 111 are arranged on the flange face 11 in a ring shape. The sleeve 2 is embedded in the mounting hole 111. The material hardness of the sleeve 2 is greater than that of the hub body 1. The sleeve 2 has an internal thread, and is used to connect an external component, such as a variable pitch bearing 10 or a main shaft, through a threaded part 3. Specifically, the plurality of mounting holes 111 are arranged on the flange face 11 in a ring shape along the edge of the flange face 11. In an embodiment, the hub has four flange faces 11. The mounting hole 111 embedded with the sleeve 2 is arranged on each flange face 11. Of course, in other embodiments, the number of flange faces 11 on the hub body 1 can be set according to requirements, such as two, four, or five, and the mounting hole 111 embedded with the sleeve 2 can be arranged on some or all of the flange faces 11 according to requirements.

[0046] As shown in the drawings, Figures 1-3 The wind power hub is embedded with the sleeve 2 with greater hardness than the hub body 1 in the mounting hole 111. The threaded part 3 is connected to the hub through the sleeve 2. The sleeve 2 can eliminate the pitch and tooth profile deviation between the threaded part 3 and the mounting hole 111, make the load distribution uniform, improve the strength of the threaded connection, and increase the load bearing capacity and fatigue resistance of the threaded connection. At the same time, the sleeve 2 can also play a buffering role between the threaded part 3 and the hub body 1, reducing impact and vibration. In addition, because the hardness of the sleeve 2 is greater, the internal thread of the sleeve 2 is not easy to damage, so that the hub body 1 can bear greater load, improve the reliability of the threaded part 3 connection, ensure the threaded part 3 connection effective in a long service life, thereby ensuring the safe operation of the unit, prolonging the service life of the hub, and improving the economic benefit. The sleeve 2 can prevent the thread from loosening or damaging, and can also prolong the service life of the mounting hole 111.

[0047] As shown in the drawings, Figure 1 In this embodiment, the threaded part 3 is a stud 31 and a nut 32 matched therewith.

[0048] In another embodiment, the threaded part can also be a bolt.

[0049] As shown in the drawings, Figure 3 The sleeve 2 is a steel wire sleeve, which can simplify the manufacturing process and facilitate the processing and manufacturing of the sleeve 2.

[0050] As shown in the drawings, Figure 3As shown, the material of the wire screw sleeve is stainless steel. The stainless steel screw sleeve 2 has high strength and hardness, can withstand large external forces and loads, and ensure the stability and durability of the product. The stainless steel screw sleeve 2 also has excellent corrosion resistance, can effectively resist the erosion of various chemical substances, and ensure that the material is not easy to rust during long-term use. At the same time, the stainless steel screw sleeve 2 also has excellent high-temperature resistance, can maintain a stable shape even in high-temperature environments, is not easy to deform, and improves safety. In addition, the surface of the stainless steel material is smooth and does not easily adhere to dirt, making it extremely easy to clean.

[0051] like Figure 1 As shown, in this embodiment, the height of the screw sleeve 2 is less than the depth of the mounting hole 111, so that the upper edge of the screw sleeve 2 is lower than the flange surface 11. This prevents the screw sleeve 2 from protruding from the flange surface 11 of the wheel hub, facilitating the subsequent installation of the flange plate 4. Furthermore, when the screw member 3 is connected and pre-tightened to the screw sleeve 2, the screw sleeve 2 will not interfere with components on the flange surface 11, and the connection effect of the screw member 3 will not be affected. In other embodiments, the height of the screw sleeve 2 is equal to the depth of the mounting hole 111.

[0052] In this embodiment, the hub body 1 is made of ductile iron, which facilitates the manufacture of the hub body 1 by casting and the processing of the hub body 1 .

[0053] In this embodiment, the screw sleeve 2 is threadedly connected to the mounting hole 111 of the hub body 1, so that the screw sleeve 2 can be screwed into the mounting hole 111 by rotating, which makes installation simple and convenient. Of course, in other embodiments, the outer circumference of the screw sleeve is provided with multiple buckles, and the screw sleeve can also be connected to the hub by multiple buckles.

[0054] In one embodiment, the nut 2 is detachably connected to the mounting hole 111, and the nut 2 has a plurality of internal threads to be adapted to the external threads of different screw members 3, so that the nut 2 installed on the hub body 1 can be replaced according to the tooth profiles of different screw members 3. Specifically, when the screw member 3 used changes, the original nut can be removed, and a new nut (such as a nut with a new tooth profile) adapted to the new screw can be connected to the mounting hole 111, thereby realizing the replacement of the nut to match different tooth profiles. In addition, in the present embodiment, the nut 2 on a hub body 1 can be a nut with the same internal thread, or it can be a nut with different internal threads. For the purpose of improving assembly efficiency, the kind of the internal thread of the mounting hole 111 on a hub body 1 is the same, and correspondingly, the external threads of all nut 2 installed in a hub body 1 are the same thread.

[0055] Before installing the screw sleeve 2, the installation hole 111 is processed on the flange surface 11 of the hub body 1, and then the installation hole 111 is tapped (to form an internal thread), and then the screw sleeve 2 is installed. The depth of the installation hole 111 is greater than the tapping depth, and the tapping depth is greater than the height of the screw sleeve 2, which facilitates the installation of the screw sleeve 2 and also improves the connection effect of the screw sleeve 2.

[0056] As shown in the drawings, Figure 1 The wind turbine generator set further includes the wind power hub and the flange plate 4 as above, the flange plate 4 is installed on the flange surface 11, and a plurality of through holes 41 are arranged on the flange plate 4, the through holes 41 are arranged correspondingly to the installation holes 111, and the inner diameter of the through holes 41 is greater than or equal to the inner diameter of the installation holes 111. The flange plate 4 is used to match the thread length on the threaded part 3 with the internal thread length of the screw sleeve 2, so as to increase the connection strength of the threaded part 3 and reduce the fatigue damage of the threaded part 3. When the thread length of the threaded part 3 is too long, a thicker flange plate 4 can be arranged, and when the thread length of the threaded part 3 is shorter, a thinner flange plate 4 can be arranged. The screw sleeve 2 can be exposed through the through holes 41 on the flange plate 4, which facilitates the connection of the threaded part 3.

[0057] As shown in the drawings, Figure 1 In this embodiment, the external component is taken as the pitch bearing for illustration, and the wind turbine generator set further includes the pitch bearing 10, the stud 31 and the nut 32, the nut 32 is screwed on one end of the stud 31, and the other end of the stud 31 is threadedly connected to the screw sleeve 2 of the wind power hub through the pitch bearing 10. The pitch bearing 10 is installed on the wind power hub through the stud 31 and the nut 32, and since the stud 31 is connected in the screw sleeve 2, the pitch bearing 10 can bear a larger load, the threaded part is effectively connected in a long service life, the risk of connection failure between the pitch bearing 10 and the wind power hub is reduced, and the safe operation of the wind turbine generator set is ensured. The stud 31 and the nut 32 are matched, which facilitates the adjustment of the pre-tightening force of the stud 31 by screwing the nut 32 during installation and maintenance, without the need to screw the stud 31.

[0058] In another embodiment, the wind turbine generator set further includes a main shaft, a stud and a nut, the nut is screwed on one end of the stud, and the other end of the stud is threadedly connected to the screw sleeve of the wind power hub through the main shaft. The main shaft is installed on the wind power hub through the stud and the nut, and since the stud is connected in the screw sleeve, the main shaft can bear a larger load, the threaded part is effectively connected in a long service life, and the safe operation of the wind turbine generator set is ensured. The stud and the nut are matched, which facilitates the adjustment of the pre-tightening force of the stud by screwing the nut during installation and maintenance, without the need to screw the stud.

[0059] In the description herein, it is to be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like refer to the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0060] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A wind turbine hub, characterized in that: It includes a hub body and a screw sleeve. The hub body has a flange surface. A plurality of mounting holes are arranged around the flange surface. The screw sleeve is embedded in the mounting hole. The material hardness of the screw sleeve is greater than the material hardness of the hub body. The screw sleeve has an internal thread and is used to be connected to an external component through a threaded part.

2. The wind turbine hub according to claim 1, characterized in that: The threaded sleeve comprises a wire threaded sleeve.

3. The wind turbine hub according to claim 2, characterized in that: The material of the wire thread insert comprises stainless steel; The material of the hub body includes ductile iron.

4. The wind turbine hub according to claim 1, wherein: The height of the screw sleeve is smaller than the depth of the mounting hole, so that the upper edge of the screw sleeve is lower than the flange surface.

5. The wind turbine hub according to claim 4, characterized in that: The depth of the mounting hole is greater than the depth of the internal thread of the mounting hole, and the depth of the internal thread is greater than the height of the screw sleeve.

6. The wind turbine hub according to claim 1, characterized in that: The screw sleeve is threadedly connected to the mounting hole of the hub body; The screw sleeve is detachably connected to the mounting hole, and the screw sleeve includes a variety of internal threads to adapt to different threaded parts.

7. 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 6.

8. The wind turbine generator set according to claim 7, wherein: The wind turbine generator set further includes a flange, which is mounted on the flange surface. The flange is provided with a plurality of through holes, which are arranged corresponding to the mounting holes, and the inner diameter of the through holes is greater than or equal to the inner diameter of the mounting hole.

9. The wind turbine generator set according to claim 8, wherein: The wind turbine generator set further includes a pitch bearing, a stud and a nut. The nut is screwed onto one end of the stud, and the other end of the stud passes through the pitch bearing and is threadedly connected to the threaded sleeve of the wind turbine hub.

10. The wind turbine generator set according to claim 8, wherein: The wind turbine generator set further comprises a main shaft, a stud and a nut. One end of the stud is screwed with the nut, and the other end of the stud passes through the main shaft and is threadedly connected to the threaded sleeve of the wind turbine hub.

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