CN108087217B

CN108087217B - Component combining bearing pedestal and front frame and wind turbine generator

Info

Publication number: CN108087217B
Application number: CN201711274977.2A
Authority: CN
Inventors: 赵云琨; 许梦华; 潘文豪
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2017-12-06
Filing date: 2017-12-06
Publication date: 2019-12-06
Anticipated expiration: 2037-12-06
Also published as: CN108087217A

Abstract

The invention discloses a component for combining a bearing pedestal and a front frame and a wind turbine generator, wherein the component comprises a front frame part and a bearing seat part which are integrally cast; the front frame part comprises a top plate, a bottom plate, a first supporting part, a second supporting part and a third supporting part, wherein the first supporting part, the second supporting part and the third supporting part are positioned between the top plate and the bottom plate; the top plate has opposite first and second ends and opposite first and second sides; the bearing seat portion is located at a first end of the top plate; the first supporting portion and the second supporting portion respectively support the first side portion and the second side portion of the top plate, and the third supporting portion supports the middle portion of the top plate. The invention adopts a structural form of three-fulcrum (a first supporting part, a second supporting part and a third supporting part) load transmission, ensures the strength and the stability of the three-fulcrum load transmission device, greatly reduces the material consumption and the weight, and adopts an arc transition and thin-wall structure as a main connecting section of the third supporting part, thereby ensuring the force transmission and efficiently utilizing the material.

Description

Component combining bearing pedestal and front frame and wind turbine generator

Technical Field

The invention relates to the field of wind turbines, in particular to a component for combining a bearing seat and a front frame and a wind turbine.

background

The existing wind turbine bearing seat and the front frame are core parts in an engine room, and the two structural members are connected through a high-strength bolt, as shown in fig. 1. The two parts act together to fix the driving chain and connect the gear box, the hub, the rear frame and other structural parts. The casting mould is usually manufactured in advance before the casting is manufactured, the bearing seat and the front frame belong to large-scale casting parts, the shape structure and the weight of the bearing seat determine the manufacturing cost of the bearing seat, and the bearing seat plays a decisive role in the production and the manufacture of the casting mould.

At present, most of mechanical parts are designed based on the design experience of engineers, and the stress of parts at the beginning of design is not directed clearly. With the mature development of the CAE structure optimization technology, the topological optimization finds the optimal distribution or the optimal force transmission path of the material in a preset design space by the innovative technology, and is more and more commonly applied to the blank part design of large-scale forging and casting parts, so as to provide a solid theoretical foundation for structural parts. The existing bearing seat and the front frame which are put into production neglect the interaction relation of the two connecting pieces at the beginning of design, are independently designed and checked, and are independently produced and manufactured. Not only occupies double design working time in the early stage, but also uses double casting molds in the later production, thereby wasting working efficiency and materials.

Disclosure of Invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a wind turbine generator and a component combining a bearing seat and a front frame, which is material-saving, light in weight and good in stability.

In order to solve the above problems, in one aspect, the present invention provides a component combining a bearing housing and a front frame, including a front frame portion and a bearing housing portion which are integrally cast; the front frame part comprises a top plate, a bottom plate, a first supporting part, a second supporting part and a third supporting part, wherein the first supporting part, the second supporting part and the third supporting part are positioned between the top plate and the bottom plate; the top plate has opposite first and second ends and opposite first and second sides; the bearing seat portion is located at a first end of the top plate; the first supporting portion and the second supporting portion respectively support the first side portion and the second side portion of the top plate, and the third supporting portion supports the middle portion of the top plate.

Further, the first support portion and the second support portion are provided with a plurality of lightening holes.

Further, the first supporting portion and the second supporting portion are respectively provided with a circular lightening hole and an oval lightening hole.

Further, the first supporting portion and the second supporting portion both adopt rib plate structures.

Further, the third support part has a circular arc structure.

Furthermore, the third supporting part and the bottom plate are connected at an included angle which is a round angle.

Further, the third supporting part has a hollow thin-walled structure.

Further, the bearing seat portion has a coaxial bearing mounting hole, a first flange and a second flange; the bearing mounting hole is located between the first flange and the second flange.

further, the gearbox mounting groove is formed in the second end portion of the top plate.

in another aspect, the invention provides a wind turbine comprising a component combining a bearing block and a front frame as described in any one of the above.

Through the implementation of the combined bearing seat, the front frame part and the wind turbine generator, the combined bearing seat and the front frame have the following technical effects:

(1) The combined bearing seat and the front frame part adopt a structural form of three-fulcrum (a first supporting part, a second supporting part and a third supporting part) for transmission and load, so that the material consumption is greatly reduced while the strength and the stability of the combined bearing seat and the front frame part are ensured, and the weight of the combined bearing seat and the front frame part is greatly reduced.

(2) The third supporting part is a main connecting section and adopts an arc transition and thin-wall structure, so that the force transmission is ensured, and the material is efficiently utilized.

(3) the fillet smooth transition is adopted at the included angle junction of the third supporting part and the bottom plate, and the casting difficulty is reduced while the stress concentration is reduced.

(4) The assembly is convenient.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic structural view of a bearing seat and a front frame of a conventional wind turbine generator set;

FIG. 2 is a front view of a component combining a bearing housing and a front frame of an embodiment of the present invention;

FIG. 3 is a right side view of the components of the combination bearing housing and front frame shown in FIG. 2;

FIG. 4 is a partial structural view of the components of the combination bearing housing and front frame of an embodiment of the present invention;

FIG. 5 is a side schematic view of the partial structure shown in FIG. 4;

Fig. 6 is a schematic view of the assembly of the components of the combined bearing housing and front frame with other components of an embodiment of the invention.

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Detailed Description

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "connected" and the like are to be interpreted broadly, e.g., as a fixed connection, unless explicitly stated or limited otherwise; can be a detachable connection; or may be a point connection; may be a direct connection; may be indirectly connected through an intermediate medium, may communicate between the two elements, and those skilled in the art will understand the specific meaning of the above terms in the present invention in specific situations.

furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The technical solutions of the above embodiments of the present invention are described in detail below with specific examples.

as shown in fig. 2 to 5, the parts of the combined bearing housing and front frame of the present embodiment include a front frame portion 1 and a bearing housing portion 2 that are integrally cast.

the front frame portion 1 includes a top plate 11, a bottom plate 12, and a first support portion 13, a second support portion 14, and a third support portion 15 between the top plate 11 and the bottom plate 12.

The top plate 11 has opposite first and second ends 111, 112 and opposite first and second sides 113, 114. As shown in fig. 2, in the present embodiment, the first end portion 111 is an arc-shaped front end, and is integrally connected to the circular bearing housing portion 2. The second end 112 is an arcuate rear end that is a gearbox mounting slot. The first side portion 113 is a left side portion, the second side portion 114 is a right side portion, and the first end portion 111, the first side portion 113, the second end portion 112 and the second side portion 114 are sequentially connected in an end-to-end manner to form a hollow top plate structure.

It should be noted that the shape of the first end portion 111 is related to the shape of the bearing seat portion, for example, if the bearing seat portion is polygonal, square or triangular, etc., the first end portion 111 is configured with a corresponding shape to match the bearing seat portion to be integrally connected, and likewise, the shape of the second end portion 112 is related to the shape of the gear box.

The first support portion 13, the second support portion 14 and the third support portion 15 form a 3-pivot bearing, as shown in fig. 2, in this embodiment, the first support portion 13 is a left support portion, the second support portion 14 is a right support portion, the first support portion 13 and the second support portion 14 are located at both sides and support a first side portion 113 and a second side portion 114 of the top plate 11, respectively, and the third support portion 15 supports a middle portion of the top plate 11. Because the middle part mainly bears the huge force from the wind wheel, the stress on two sides is small, and the first supporting part 13 and the second supporting part 14 adopt rib plate structures to support two ends. Meanwhile, in order to achieve overall weight reduction, on one hand, the first supporting part 13 and the second supporting part 14 adopt a relatively single thin rib plate structure, wherein the thickness of the rib plate and the arrangement of reinforcing beams between the plates are related to the bearing of two sides; on the other hand, the first support portion 13 and the second support portion 14 are provided with a plurality of lightening holes. As shown in fig. 3, the second support portion 14 is provided with a circular lightening hole 141 and an elliptical lightening hole 142, and the first support portion 13 is also provided with a corresponding circular lightening hole and an elliptical lightening hole. Wherein the size, position and shape of the lightening holes are related to the stress condition of the first supporting part 13 and the second supporting part 14 so as to satisfy certain strength and rigidity.

The third supporting portion 15 is used as a main supporting portion, two ends of the arc structure 151 adopted by the third supporting portion 15 are connected with the middle portion of the top plate 11 (the top plate position connected with the lower end of the bearing seat portion) and the bottom plate 12 of the front frame portion, so as to ensure that the force applied to the bearing seat portion by the driving chain is transmitted to the bottom plate of the front frame portion and then weakened, on one hand, the third supporting portion 15 is not solid but adopts a hollow thin-wall structure 153 for reducing the weight, on the other hand, in order to reduce the stress concentration and simultaneously reduce the casting difficulty, a fillet 152 is adopted at the connection included angle between the third supporting portion 15. In this embodiment, as shown in fig. 4, the third supporting portion 15 adopts an arc structure 151 with an angle smaller than 45 degrees, the upper end of the third supporting portion is connected with the middle of the top plate 11, the lower end of the third supporting portion is connected with the bottom plate 12, and the middle of the third supporting portion adopts arc transition, as shown in fig. 5, the right arc and the bottom plate 12 form a large included angle exceeding 90 degrees, so as to disperse the force, the left arc and the bottom plate 12 form an included angle smaller than 90 degrees, and in order to reduce stress concentration and reduce casting difficulty, the included angle adopts a large round angle for smooth transition.

It should be noted that the third supporting portion 15 can adopt various angles of arc structures or other special-shaped structures, such as wave-shaped, S-shaped, etc., to disperse the force and enhance the load-bearing capacity. Similarly, the third supporting portion 15 forms an included angle with the bottom plate 12 smaller than 90 degrees, and other special-shaped transitions can be adopted in addition to the large round angle transition.

The bearing housing part 2 has a bearing mounting hole 21, a first flange and a second flange which are coaxial; the bearing mounting hole is located between the first flange and the second flange.

The embodiment of the invention also provides a wind turbine generator, which comprises the combined bearing seat and the front frame.

The corresponding assembling method for the combined bearing pedestal and the front frame component in the embodiment of the invention comprises the following steps:

Horizontally fixing the combined bearing seat and the parts of the front frame;

The main shaft 3 is arranged in the bearing in a penetrating way, and the bearing is arranged in the bearing mounting hole 21;

Mounting the first bearing seal 41 to the first flange and the second bearing seal 42 to the second flange;

Mounting the gearbox 5 in the gearbox mounting groove (at the second end 112);

The main shaft 3 is connected with a gear box 5 and an elastic support 6.

As shown in fig. 4, in this embodiment, the components of the combination bearing seat and the front frame are leveled and fixed after alignment, and the driving chain components such as the main shaft 3, the front sealing ring 41 of the bearing, the rear sealing ring 42 of the bearing, and the like are assembled with the components of the combination bearing seat and the front frame by adopting a proper assembly process sequence. The assembled structure is then connected to the gearbox 5 and the flexible support 6. And finally, connecting the rear frame, various part protective covers and the like to the completed assembly body to complete the assembly work.

In the embodiment of the invention, a three-support part structure is adopted, so that the material consumption is greatly reduced while the strength is ensured, and the material consumption is reduced by 13% compared with that of the original parts; meanwhile, the third supporting part is a main connecting section and adopts an arc transition and thin-wall structure, so that the force transmission is ensured, the material is efficiently utilized, and the corner joint between the third supporting part and the bottom plate adopts fillet smooth transition, so that the casting difficulty is reduced while the stress concentration is reduced.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A component for combining a bearing seat and a front frame is characterized by comprising a front frame part and a bearing seat part which are integrally cast; the front frame part comprises a top plate, a bottom plate, a first supporting part, a second supporting part and a third supporting part, wherein the first supporting part, the second supporting part and the third supporting part are positioned between the top plate and the bottom plate; the top plate has opposite first and second ends and opposite first and second sides; the bearing seat portion is located at a first end of the top plate; the first supporting portion and the second supporting portion support a first side portion and a second side portion of the top plate respectively, the first supporting portion and the second supporting portion are provided with a plurality of lightening holes, the third supporting portion supports the middle of the top plate, and the third supporting portion is of an arc structure.

2. a unit bearing housing and front frame assembly as claimed in claim 1, wherein said first and second support portions are provided with a circular and an oval lightening hole respectively.

3. The combination bearing bracket and front frame assembly of claim 1, wherein the first and second support portions each comprise a rib structure.

4. The combination bearing bracket and front frame assembly of claim 1 wherein said third support portion is rounded at an angle to said bottom plate.

5. the combination bearing housing and front frame assembly of claim 1 wherein said third support portion has an internally hollow thin wall construction.

6. The combination bearing housing and front frame component of claim 1, wherein said bearing housing portion has coaxial bearing mounting holes, a first flange and a second flange; the bearing mounting hole is located between the first flange and the second flange.

7. The combination bearing housing and front frame assembly of claim 6, further comprising a gearbox mounting slot at the second end of the top plate.

8. Wind turbine comprising a component combining a bearing support and a front frame according to any one of claims 1 to 7.