CN211314446U

CN211314446U - Wind generating set and hub thereof

Info

Publication number: CN211314446U
Application number: CN201921803356.3U
Authority: CN
Inventors: 韩佳; 罗典; 宫伟; 张凯; 张万军; 朱万新
Original assignee: CSIC Haizhuang Windpower Co Ltd
Current assignee: CSIC Haizhuang Windpower Co Ltd; China State Shipbuilding Corp Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-08-21
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a wind generating set and a hub thereof, the hub mainly comprises a web plate, the edge of the web plate is in arc transition with the flange convex wall of the hub, the web plate is provided with a plurality of process holes for assisting in installing paddle assembly bolts, the centers of the process holes are distributed on a first circumference taking the center of the web plate as the center of a circle, and the radius of the first circumference is the same as the radius of the circumference where each bolt hole for matching the paddle assembly bolts is positioned on the inner ring of a variable-pitch bearing; the edge of the web plate is in arc transition with the convex wall of the flange, the edge of the web plate is in a gradually-changed chamfering structure, the stress of the edge of the process hole can be optimized, the stress concentration caused by structural change is reduced, in addition, the position of the process hole is determined within a certain range, the design period of the web plate of the hub can be effectively shortened, the process hole is formed in the web plate according to the position, the stress level of the process hole is low, the intensity of the process hole can be ensured without excessively thickening the whole or the local part of the hub, and the control of the weight of the hub is facilitated.

Description

Wind generating set and hub thereof

Technical Field

The utility model relates to a aerogenerator wheel hub assembles technical field, especially relates to a wind generating set's wheel hub. Furthermore, the utility model discloses still relate to a wind generating set including above-mentioned wheel hub.

Background

In a wind generating set, a hub is used as a main bearing part of a wind wheel system, the rear end of the hub is connected with a transmission chain through a main shaft, and three variable-pitch end faces hang fan blades through variable-pitch bearings. In order to conveniently beat and install the connecting bolts of the variable-pitch blades, process holes need to be formed in a web plate of the hub, and the size and the number of the holes formed in the process holes need to meet the requirement of the number of the beat bolts, so that the bolts are beaten from the hub.

The weak department of intensity as the wheel hub web of process hole department of division, in order to make the intensity of process hole satisfy the requirement and reduce the stress level of trompil department, generally need many rounds of iterations when the design, design cycle is longer, can directly adopt the mode of thickening wheel hub wall thickness or local thickening trompil position when the design time limit for the whole weight of wheel hub increases, does not satisfy the weight control requirement of cost reduction increase.

Therefore, how to solve the problems of long design cycle of the process holes formed in the web plate of the hub, high stress level at the holes, difficulty in controlling the overall weight of the hub and the like is a technical problem to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wind generating set's wheel hub, its design cycle is short, and fabrication hole department stress level is low, and need not to do too much thickening to wheel hub whole or part, is favorable to the control of wheel hub weight. Another object of the utility model is to provide a wind generating set including above-mentioned wheel hub.

In order to solve the technical problem, the utility model provides a hub of wind generating set, including the web, the edge of web and the protruding wall arc transition of flange of hub, be equipped with a plurality of fabrication holes that are used for the supplementary paddle assembly bolt of installing on the web, each the center distribution of fabrication hole is on the first circumference that uses the web center as the centre of a circle, the radius R of first circumference is the same with the radius that is used for matching the circumference that each bolt hole of paddle assembly bolt is located on the inner circle of variable pitch bearing;

each process hole comprises a first process hole, a second process hole, a third process hole and a fourth process hole, and the included angle theta between the radius of the center of the first process hole and the radial central axis of the web plate₁In the range of 55.25 ° -57.25 °; an included angle theta between the radius of the center of the second fabrication hole and the radial central axis of the web plate₂In the range of 75.5 ° -77.5 °; an included angle theta between the radius of the center of the third fabrication hole and the radial central axis of the web₃In the range of 154.5 ° -156.5 °; an included angle theta between the radius of the center of the fourth process hole and the radial central axis of the web plate₄Ranging from 233 deg. to 235 deg..

Preferably, θ₁Is 56.25 DEG theta₂Is 76.5 DEG theta₃Is 155.5 DEG theta₄Is 234.

Preferably, the first fabrication hole is a circular hole; the second fabrication hole, the third fabrication hole and the fourth fabrication hole are long holes with lengths extending along the first circumference, one side of the long hole far away from the center of the web is a first circular arc with the center of the web as the center of a circle, two ends of the long hole are both second circular arcs, one side of the long hole close to the center of the web is a third circular arc with the middle point of the first circular arc as the center of a circle, and the first circular arc, the second circular arc and the third circular arc are in arc transition at the joint.

Preferably, the radius R1 of the first tooling hole is 50 mm; the radius of the first circular arc of the second process hole, the radius of the third process hole and the radius of the first circular arc of the fourth process hole are R +50mm, the radius of the second circular arc of the second process hole is 50mm, the radius of the third circular arc of the second process hole and the radius of the third circular arc of the fourth process hole are 160mm, and the radius of the third circular arc of the third process hole is 117.7 mm.

Preferably, the central angle between the centers of the two second circular arcs is 4.5 ° or 9 °.

The utility model also provides a wind generating set, including wheel hub, blade and generator, wheel hub specifically is above-mentioned arbitrary one wheel hub.

The utility model provides a hub of a wind generating set, which comprises a web plate, wherein the edge of the web plate is in arc transition with a flange convex wall of the hub, a plurality of process holes for assisting in installing paddle assembly bolts are arranged on the web plate, the centers of the process holes are distributed on a first circumference taking the center of the web plate as the circle center, and the radius R of the first circumference is the same as the radius of the circumference where bolt holes for matching the paddle assembly bolts are arranged on the inner ring of a variable-pitch bearing; each process hole comprises a first process hole, a second process hole, a third process hole and a fourth process hole, and the included angle theta between the radius of the center of the first process hole and the radial central axis of the web plate₁In the range of 55.25 ° -57.25 °; the included angle theta between the radius of the center of the second fabrication hole and the radial central axis of the web plate₂In the range of 75.5 ° -77.5 °; an included angle theta between the radius of the center of the third fabrication hole and the radial central axis of the web plate₃In the range of 154.5 ° -156.5 °; an included angle theta between the radius of the center of the fourth fabrication hole and the radial central axis of the web plate₄Ranging from 233 to 235 degrees; the radial central axis of the web is parallel to the central axis of the hub.

The utility model provides a wind generating set's wheel hub, with the edge of web and the protruding wall arc transition of wheel hub's flange, make the edge of web adopt the chamfer structure of gradual change, can optimize the atress at the edge of fabrication hole, reduce the stress concentration effect that arouses because of structural change, confirm the position of fabrication hole within certain within range in addition, can effectively shorten wheel hub web design cycle, and set up the fabrication hole on the web according to above-mentioned position, fabrication hole department stress level is low, need not to do too much thickening to wheel hub whole or part and can guarantee the intensity of fabrication hole department, be favorable to the control of wheel hub weight.

The utility model provides a wind generating set includes above-mentioned wheel hub, because above-mentioned wheel hub has above-mentioned technological effect, above-mentioned wind generating set also should have same technological effect, no longer introduces in detail here.

Drawings

Fig. 1 is a schematic structural diagram of a specific embodiment of a wheel hub provided by the present invention;

fig. 2 is another schematic structural diagram of an embodiment of a wheel hub provided by the present invention;

FIG. 3 is an assembly view of one embodiment of a wheel hub provided by the present invention;

FIG. 4 is an inside schematic view of one embodiment of a web provided by the present invention;

FIG. 5 is an enlarged view of section I of FIG. 4;

fig. 6 is an enlarged view of section ii in fig. 4.

The drawings are numbered as follows:

the structure comprises a web plate 1, a flange convex wall 2, a fabrication hole 3, a first fabrication hole 31, a second fabrication hole 32, a third fabrication hole 33, a fourth fabrication hole 34, a variable pitch bearing 4, a manhole 5 and a connecting end hole 6;

r is the radius of the first circle, R1 is the radius of the first tooling hole, R2 is the radius of the first circular arc, R3 is the radius of the second circular arc, and R4 is the radius of the third circular arc.

Detailed Description

The core of the utility model is to provide a wind generating set's wheel hub, its design cycle is short, and fabrication hole department stress level is low, and need not to do too much thickening to wheel hub whole or part, is favorable to the control of wheel hub weight. The utility model discloses a another core provides a wind generating set including above-mentioned wheel hub.

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a wheel hub according to an embodiment of the present invention; fig. 2 is another schematic structural diagram of an embodiment of a wheel hub provided by the present invention; fig. 3 is an assembly diagram of a specific embodiment of a wheel hub provided by the present invention.

The utility model provides a wind generating set's wheel hub, including web 1, the edge of web 1 and the 2 arc transition of wheel hub's flange bay, be equipped with a plurality of fabrication holes 3 that are used for supplementary installation paddle assembly bolt on the web 1, wherein paddle assembly bolt is the bolt that is used for connecting the blade root flange that becomes the oar blade and becomes 4 inner circles of oar bearing, the center distribution of each fabrication hole 3 is on the first circumference that uses web 1 center as the centre of a circle, the radius R of first circumference is changeed the radius that is used for matcing each bolt hole place circumference of paddle assembly bolt in the circle with becoming 4.

It should be noted that, the structure of the hub is generally as shown in fig. 1 and 3, the whole is spherical, the front end is a manhole 5, the rear end is a connecting end hole 6 for connecting the hub and the main shaft, the middle spherical surface is provided with three webs 1 forming included angles with each other, and a flange convex wall 2 for mounting a variable pitch blade surrounds the webs 1; when the wind driven generator is assembled, the variable-pitch blade is connected with the hub through the variable-pitch bearing 4, specifically, the flange convex wall 2 of the hub, the outer ring of the variable-pitch bearing 4, the inner ring of the variable-pitch bearing 4 and a blade root flange of the variable-pitch blade are respectively provided with a plurality of bolt holes, the outer ring of the variable-pitch bearing 4 is fixed on the flange convex wall 2 of the hub through bolts, the inner ring of the variable-pitch bearing 4 is positioned outside the web plate 1, the inner ring of the variable-pitch bearing 4 is connected with the blade root flange of the variable-pitch blade through bolts, the web plate 1 is provided with the process holes 3, when the variable-pitch blade is installed, an operator can stand in the.

In addition, the wheel hub models are different, the corresponding variable pitch bearings 4 are different in model, the radius of the first circumference is different, the position of each process hole 3 is adjusted according to the wheel hub model, and after the wheel hub model is determined, the radius of the first circumference is also determined.

As the radial position of the fabrication hole 3 on the web plate 1 corresponds to the position of a bolt hole on the inner ring of the variable pitch bearing 4, the fabrication holes 3 are all positioned at the edge of the web plate 1, the edge of the web plate 1 and the flange convex wall 2 of the hub are in arc transition, namely the edge of the web plate 1 adopts a gradually-changed chamfer structure, the stress of the edge of the fabrication hole 3 can be optimized, and the stress concentration effect caused by structural change is reduced.

The utility model provides a wind generating set's wheel hub does not do the specific restriction to the quantity that sets up of fabrication hole 3, for guaranteeing wheel hub intensity, the quantity of fabrication hole 3 on the web 1 can not be too much, be equipped with the round bolt hole usually in the inner circle of variable pitch bearing 4, for reducing the quantity of fabrication hole 3 on the web 1, can execute to beat a plurality of paddle assembly bolts through a fabrication hole 3, during the operation, rotate the inner circle of variable pitch bearing 4, make the bolt hole on it in proper order just to fabrication hole 3, and go on in proper order through fabrication hole 3 and execute to beat the operation; meanwhile, the number of the fabrication holes 3 on the web plate 1 cannot be too small for convenient operation and reduction of the rotation times.

Specifically, four process holes 3 may be provided on the web 1, the four process holes 3 are respectively marked as a first process hole 31, a second process hole 32, a third process hole 33 and a fourth process hole 34, if a vertical coordinate system is established on the plane of the web 1 by using the center of the web 1 as an origin, the radial central axis of the web 1 as an x-axis and the vertical axis as a y-axis, as shown in fig. 2, the included angle θ between the center of the first process hole 31 and the x-axis is marked as₁The center of the second fabrication hole 32 is at an angle θ with respect to the x-axis₂The center of the third process hole 33 forms an angle theta with respect to the x-axis₃The center of the fourth process hole 34 has an angle theta with respect to the x-axis₄Then theta₁The value range of (a) is preferably 55.25-57.25 DEG theta₂The value range of (A) is preferably 75.5-77.5 DEG theta₃The value range of (a) is preferably 154.5-156.5 DEG theta₄The value range of (A) is preferably 233-235 degrees; set up fabrication hole 3 on web 1 according to above-mentioned position, the stress level in fabrication hole 3 department is low, need not to do too much thickening to the whole or part of wheel hub and can guarantee the intensity in fabrication hole 3 department, is favorable to the control of wheel hub weight, confirms the position of fabrication hole 3 in certain within range in addition, can effectively shorten 1 design cycle of wheel hub web.

Preferably, when the hub is manufactured, theta can be adjusted₁Size of (2)Is set at 56.25 DEG theta₂Is set to 76.5 deg., theta₃Is set to 155.5 deg., theta₄Is set at 234 deg., where the strength is highest and the stress level is lowest at via 3, as can be seen from experimental data.

It should be noted that, in the wind turbine generator system, the connection end hole 6 for connecting the hub and the main shaft is located on the hub installation reference surface, the central axis of the connection end hole 6 is the central axis of the hub, and the straight line on the plane where the web 1 is located, which is parallel to the central axis of the hub and passes through the center of the web 1, is the radial central axis of the web 1.

Referring to fig. 4 to 6, fig. 4 is an inside schematic view of an embodiment of a web according to the present invention; FIG. 5 is an enlarged view of section I of FIG. 4; fig. 6 is an enlarged view of section ii in fig. 4.

On the basis of the above-mentioned embodiment, the utility model discloses do not do specific restriction to the shape and the size of each fabrication hole 3, the shape is in order to reduce local stress level as the standard, and no closed angle, the size can hold the bolt and execute and beat the instrument can.

In one embodiment, the first tooling holes 31 are preferably round holes and have a radius R1 of preferably 50 mm; the second technical hole 32, the third technical hole 33 and the fourth technical hole 34 are preferably all oblong holes with the length extending along a first circumference, the outer side (the side far away from the center of the web plate 1) of each oblong hole is a first circular arc with the center of the web plate 1 as the center, both ends of each oblong hole are second circular arcs, the inner side (the side close to the center of the web plate 1) of each oblong hole is a third circular arc with the center point of the first circular arc as the center, the joints of the circular arcs are in arc transition, the radius R2 of each first circular arc is 50mm larger than the radius R of the first circumference, the radius R3 of each second circular arc is 50mm, the radius R4 of the third circular arcs of the second technical hole 32 and the fourth technical hole 34 is 160mm, and the radius R4 of the third circular arc of the third technical hole 33 is 117.7 mm.

The length of the oblong hole extends along the first circumference, the length of the oblong hole depends on the size of the first circumference and a central angle alpha between the centers of the two second arcs, and the central angle alpha between the centers of the two second arcs can be specifically selected according to the number of bolt holes in the inner ring of the pitch bearing 4. Preferably, the central angle α between the centers of the two second circular arcs of the oblong hole has a magnitude of 4.5 ° or 9 °.

It should be noted that the centers of the two second arcs are both on the first circumference, and the central angle refers to an angle formed between a connecting line between the two centers of the two arcs and the center of the web 1.

When the blade assembly bolts are punched, one blade assembly bolt can be punched every time through the first process hole 31, then the inner ring of the variable-pitch bearing 4 is rotated to punch the next bolt, and two or more blade assembly bolts can be punched every time through the second process hole 32, the third process hole 33 and the fourth process hole 34, so that the rotating frequency of the inner ring of the variable-pitch bearing 4 can be reduced, and the assembly efficiency is improved.

To sum up, the utility model provides a wind generating set's wheel hub has made clear the position of fabrication hole 3, can effectively shorten design cycle, and originally according to the utility model provides a fabrication hole 3 is seted up to the position in the abdomen, and 3 stress level of fabrication hole are low, need not to do too much thickening to the whole or part of wheel hub and can guarantee the intensity of 3 departments of fabrication hole, are favorable to the control of wheel hub weight.

In addition to the above wheel hub, the specific embodiment of the present invention further provides a wind turbine generator system including the above wheel hub, and the structure of other parts of the wind turbine generator system refers to the prior art, which is not repeated herein.

In the description of the present invention, it is to be understood that the terms "front", "back", and the like, indicate orientations or relationships based on the orientations or positional relationships shown in the drawings, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

In addition, the embodiments in the specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant part can be referred to the method part for description.

It is right above the utility model provides a wind generating set and wheel hub thereof have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The hub of the wind generating set is characterized by comprising a web plate (1), wherein the edge of the web plate (1) is in arc transition with a flange convex wall (2) of the hub, a plurality of process holes (3) for assisting in installing blade assembling bolts are formed in the web plate (1), the center of each process hole (3) is distributed on a first circumference which takes the center of the web plate (1) as the center of a circle, and the radius R of the first circumference is the same as the radius of the circumference where bolt holes used for matching the blade assembling bolts are formed in an inner ring of a variable-pitch bearing (4);

each process hole (3) comprises a first process hole (31), a second process hole (32), a third process hole (33) and a fourth process hole (34), and the included angle theta between the radius of the center of the first process hole (31) and the radial central axis of the web (1)₁In the range of 55.25 ° -57.25 °; the included angle theta between the radius of the center of the second fabrication hole (32) and the radial central axis of the web plate (1)₂In the range of 75.5 ° -77.5 °; the included angle theta between the radius of the center of the third fabrication hole (33) and the radial central axis of the web plate (1)₃In the range of 154.5 ° -156.5 °; the above-mentionedThe included angle theta between the radius of the center of the fourth process hole (34) and the radial central axis of the web plate (1)₄Ranging from 233 deg. to 235 deg..

2. The hub of a wind turbine according to claim 1, wherein θ is θ₁Is 56.25 DEG theta₂Is 76.5 DEG theta₃Is 155.5 DEG theta₄Is 234.

3. The hub of a wind park according to claim 1 or 2, wherein the first fabrication hole (31) is a circular hole; the second fabrication hole (32), the third fabrication hole (33) and the fourth fabrication hole (34) are long oblong holes extending along the first circumference, one side of the center of the web (1) is a first circular arc with the center of the web (1) as the center of a circle, two ends of each oblong hole are second circular arcs, one side of each oblong hole close to the center of the web (1) is a third circular arc with the middle point of the first circular arc as the center of a circle, and the first circular arc, the second circular arc and the third circular arc are in arc transition at the joint.

4. The hub of a wind park according to claim 3, wherein the radius R1 of the first fabrication hole (31) is 50 mm; the radius of the first circular arc of the second process hole (32), the third process hole (33) and the fourth process hole (34) is R +50mm, the radius of the second circular arc is 50mm, the radius of the third circular arc of the second process hole (32) and the fourth process hole (34) is 160mm, and the radius of the third circular arc of the third process hole (33) is 117.7 mm.

5. The hub of a wind park according to claim 4, wherein the centre angle between the centres of the two second arcs is 4.5 ° or 9 °.

6. Wind park comprising a hub, blades and a generator, wherein the hub is in particular a hub according to any of claims 1 to 5.