CN211777833U

CN211777833U - Front support of wind generating set flow guide cover

Info

Publication number: CN211777833U
Application number: CN202020295128.6U
Authority: CN
Inventors: 付薇; 王绍民; 郭辰; 张立英; 刘鑫
Original assignee: Huaneng Clean Energy Research Institute
Current assignee: Huaneng Clean Energy Research Institute
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-10-27
Anticipated expiration: 2030-03-11

Abstract

The utility model discloses a wind generating set kuppe fore-stock belongs to wind power generation technical field. Comprises a conical cylinder, a large annular plate fixedly connected with the large end of the conical cylinder and a small annular plate fixedly connected with the small end of the conical cylinder; the small end of the conical cylinder is connected with a plurality of hangers, the hangers are fixedly connected with the small annular plate, and the lower plane of the hangers is tightly attached to the upper plane of the small annular plate. Compared with the existing wind generating set wind deflector front support, the integrated conical cylinder structure is adopted, the large ring plate and the small ring plate are respectively fixedly connected with the large end and the small end of the conical cylinder, and the small ring plate is stressed greatly and is connected with the conical cylinder through the hanging lugs, so that the supporting strength of the front support is enhanced, the stress is uniform, the stress concentration is avoided, and the problem that the hub and the wind deflector front support crack due to stress concentration is solved. Structural design is reasonable, connects reliably, has guaranteed the safe operation of fan.

Description

Front support of wind generating set flow guide cover

Technical Field

The utility model belongs to the technical field of wind power generation, concretely relates to wind generating set kuppe fore-stock.

Background

The wind deflector of the wind generating set is an outer protective cover of the fan hub, structurally protects the hub and related parts inside the hub from the influence of the external climate environment and pressure, and effectively ensures the normal work of the wind generating set. Functionally, because the airflow can be evenly divided according to the streamline of the air guide sleeve in the windward state of the fan, the utilization rate of wind energy can be improved, the waste of resources is reduced, and the function of the wind generating set is better exerted. Therefore, the air guide sleeve has very important influence on the stability, the generating efficiency, the wind energy utilization rate and the aerodynamic performance of the wind turbine blade.

The structure of the air guide sleeve is generally divided into an integral air guide sleeve and a split air guide sleeve. The common split-type air guide sleeve is formed by splicing 3 1/3 cover body parts and a cover head part by a mechanical connection method. The split type air guide sleeve has the advantages that: the die is simple, the operation is relatively easy, and the assembly is flexible. The integral dome is required to be integrally molded in a combined mold at one time, and the requirements on the mold and the operation requirements on the process are high, so that the integral dome is not common. The general split type air guide sleeve is transported to a site after being assembled with a hub in a factory, a head part of the air guide sleeve is connected with the front end of the hub through a front support, and the rear part of the air guide sleeve is connected with the hub support through a bolt. At present, a common front support is formed by connecting an upper annular plate and a lower annular plate through spot welding of metal materials such as square tubes or round tubes, the welding area is small, and in the running process of a fan, due to the rotation of a wind wheel, stress of welding points is concentrated, so that welding seams of the front support at the welding part are easy to crack, and the safe running of the fan can be damaged.

Disclosure of Invention

In order to solve the defect that exists among the above-mentioned prior art, the utility model aims to provide a wind generating set kuppe fore-stock has strengthened the support intensity of fore-stock, has overcome the problem of wheel hub and kuppe fore-stock because of stress concentration fracture.

The utility model discloses a following technical scheme realizes:

the utility model discloses a front support of a wind turbine generator system guide cover, which comprises a conical cylinder, a large annular plate fixedly connected with the large end of the conical cylinder and a small annular plate fixedly connected with the small end of the conical cylinder; the small end of the conical cylinder is connected with a plurality of hangers, the hangers are fixedly connected with the small annular plate, and the lower plane of each hanger is tightly attached to the upper plane of the small annular plate; the small annular plate is provided with a plurality of hub connecting holes, and the large annular plate is provided with a plurality of dome cover head connecting holes; a lug connecting hole corresponding to the hub connecting hole is formed in the lug at the hub connecting hole;

when the small annular plate is used, the small annular plate is fixedly connected with the hub through the connecting piece, and the large annular plate is fixedly connected with the flow guide cover head through the connecting piece.

Preferably, the cone-shaped cylinder and the hanging lug are of an integral structure.

Preferably, the tapered barrel is provided with a plurality of lightening holes.

Further preferably, the lightening holes are evenly distributed on the conical cylinder.

Further preferably, the lightening holes are oval.

Preferably, the hub connection holes are evenly distributed on the small annular plate.

Preferably, the dome cover head connecting holes are evenly distributed on the large circular plate.

Further preferably, the number of hangers is 4.

Preferably, the circle center of the hanging lug connecting hole is coincided with the center of the hanging lug.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a wind generating set kuppe fore-stock compares with current wind generating set kuppe fore-stock, has adopted integral toper section of thick bamboo structure, big or small ring plate respectively with toper section of thick bamboo big or small end fixed connection, because of wheel hub link atress is great, little ring plate department has strengthened the joint strength with a toper section of thick bamboo through the hangers, has strengthened the support intensity of fore-stock, the atress is even, stress concentration has been avoided, wheel hub and kuppe fore-stock problem of fracture because of stress concentration has been overcome. Structural design is reasonable, connects reliably, has guaranteed the safe operation of fan.

Furthermore, the conical cylinder and the hanging lugs are of an integrated structure, so that the connection strength is improved, and potential fault hazards possibly caused by other connection modes are reduced.

Furthermore, the weight of the conical cylinder can be reduced by arranging the plurality of lightening holes, the rotary inertia is lightened, and the system control difficulty is reduced.

Furthermore, the lightening holes are uniformly distributed on the conical cylinder, so that the stress is uniform during rotation, and the balance is good.

Furthermore, the lightening holes are oval, so that the stress concentration coefficient can be reduced, and the stress concentration can be avoided or reduced.

Furthermore, the hub connecting holes are uniformly distributed on the small annular plate, so that the small annular plate and the hub are reliably connected and are uniformly stressed in all directions.

Furthermore, the connecting holes of the flow guide cover head are uniformly distributed on the large circular plate, so that the large circular plate and the flow guide cover head are reliably connected and are uniformly stressed in all directions.

Furthermore, the number of the hanging lugs is 4, and the hanging lugs are spaced by 90 degrees, so that the front support of the air guide sleeve can be stressed symmetrically.

Furthermore, the circle center of the hanging lug connecting hole coincides with the center of the hanging lug, so that the free penetration of the bolt is ensured, and the shearing force generated on the bolt is avoided, and the quality hidden danger is generated.

Drawings

FIG. 1 is a schematic view of the overall structure of a front support of a wind turbine generator system dome of the present invention;

fig. 2 is a schematic view of the material forming of the cone-shaped cylinder of the present invention.

In the figure: 1. the novel wind deflector comprises a large annular plate, 2 a conical cylinder, 3 a small annular plate, 4 a hanging lug, 5 a lightening hole, 6 a hub connecting hole, 7 a flow guide cover head connecting hole, 8 a hanging lug connecting hole.

Detailed Description

The invention will be described in further detail with reference to the following drawings and specific examples, which are intended to illustrate and not to limit the invention:

as figure 1, the utility model discloses a wind generating set kuppe fore-stock, including a toper section of thick bamboo 2 and with toper section of thick bamboo 2 big end fixed connection's big annular plate 1 and with toper section of thick bamboo 2 little end fixed connection's little annular plate 3.

The small end of the conical cylinder 2 is connected with a plurality of hangers 4, in a preferred embodiment of the utility model, the number of hangers 4 is 4, the hangers 4 are arranged at intervals of 90 degrees at the small end of the conical cylinder 2, and the conical cylinder 2 and the hangers 4 adopt an integrated structure; the hanging lug 4 is fixedly connected with the small annular plate 3, and the lower plane of the hanging lug 4 is tightly attached to the upper plane of the small annular plate 3.

A plurality of lightening holes 5 can be formed in the conical barrel 2, the lightening holes 5 are uniformly distributed on the conical barrel 2, and the lightening holes 5 are oval.

A plurality of hub connecting holes 6 are uniformly distributed on the small annular plate 3, and a plurality of dome cover head connecting holes 7 are uniformly distributed on the large annular plate 1; the hanger 4 at the hub connecting hole 6 is provided with a hanger connecting hole 8 corresponding to the hub connecting hole 6, and the circle center of the hanger connecting hole 8 is superposed with the center of the hanger 4.

When the small annular plate is used, the small annular plate 3 is fixedly connected with the hub through the connecting bolt, and the large annular plate 1 is fixedly connected with the flow guide cover head through the connecting bolt.

The utility model discloses a manufacturing process of wind generating set kuppe fore-stock as follows:

as shown in fig. 2, after the

conical cylinder

2 and 4 ear hangers 4 are blanked together, an oval lightening hole 5 is processed on the conical cylinder 2, the conical cylinder 2 is rolled and formed, and the ear hangers 4 are bent outwards by 90 degrees; the inner periphery of the large annular plate 1 and the large end of the conical cylinder 2 are connected in a full-welding mode along the circumference, the inner periphery of the small annular plate 3 and the small end of the conical cylinder 2 are welded along the circumference, except that the contact part of the bottom of the ear hook 4 and the inner periphery of the small annular plate 3 is not welded, and three edges of the ear hook 4 and the small annular plate 3, which are attached to each other in a plane, are welded. The large circular plate 1 is a part connected with the wind turbine generator set dome cover head through bolts, and bolt holes identical to the connection positions of the cover head are punched in the large circular plate 1. The small annular plate 3 is a part connected with the hub through a bolt, a bolt hole which is the same as the joint of the hub is punched in the small annular plate 3, and when the small annular plate 3 is punched, the bolt hole is ensured to be in the central position of the 4 ear hooks 4 and coaxial with the small annular plate 3.

It should be noted that the above description is only one of the embodiments of the present invention, and all equivalent changes made by the system described in the present invention are included in the protection scope of the present invention. The technical field of the present invention can be replaced by other embodiments described in a similar manner, without departing from the structure of the present invention or exceeding the scope defined by the claims, which belong to the protection scope of the present invention.

Claims

1. The front support of the wind generating set air guide sleeve is characterized by comprising a conical cylinder (2), a large annular plate (1) fixedly connected with the large end of the conical cylinder (2) and a small annular plate (3) fixedly connected with the small end of the conical cylinder (2); the small end of the conical cylinder (2) is connected with a plurality of hangers (4), the hangers (4) are fixedly connected with the small annular plate (3), and the lower plane of the hangers (4) is tightly attached to the upper plane of the small annular plate (3); the small annular plate (3) is provided with a plurality of hub connecting holes (6), and the large annular plate (1) is provided with a plurality of dome cover head connecting holes (7); a hanger connecting hole (8) corresponding to the hub connecting hole (6) is arranged on the hanger (4) at the hub connecting hole (6);

when the small annular plate is used, the small annular plate (3) is fixedly connected with the hub through the connecting piece, and the large annular plate (1) is fixedly connected with the flow guide cover head through the connecting piece.

2. The front support of the wind generating set air guide sleeve according to claim 1, characterized in that the conical cylinder (2) and the hanging lug (4) are of an integral structure.

3. The front support of the wind generating set dome of claim 1, characterized in that the conical cylinder (2) is provided with lightening holes (5).

4. The front support of the wind generating set dome of claim 3, characterized in that the lightening holes (5) are evenly distributed on the conical cylinder (2).

5. The front support of a wind turbine nacelle according to claim 3, characterised in that the lightening holes (5) are oval.

6. The front support of the wind generating set dome of claim 1, characterized in that the hub attachment holes (6) are evenly distributed on the small annular plate (3).

7. The front support of the wind generating set dome of claim 1, characterized in that the dome head attachment holes (7) are evenly distributed on the large circular plate (1).

8. Wind turbine generator system pod front bracket according to claim 7, characterized in that the number of suspension loops (4) is 4.

9. The front bracket of the wind generating set air guide sleeve according to claim 1, characterized in that the circle center of the hanging lug connecting hole (8) is coincident with the center of the hanging lug (4).