CN109555655B

CN109555655B - Wind generating set casting main frame

Info

Publication number: CN109555655B
Application number: CN201710883753.5A
Authority: CN
Inventors: 陈文权; 欧阳华; 杨兆忠; 李由; 张奇虎; 张述森; 钟杰
Original assignee: CRRC Zhuzhou Institute Co Ltd
Current assignee: CRRC Zhuzhou Institute Co Ltd
Priority date: 2017-09-26
Filing date: 2017-09-26
Publication date: 2020-10-30
Anticipated expiration: 2037-09-26
Also published as: CN109555655A

Abstract

The invention discloses a cast main frame of a wind generating set, which comprises a hollow shell, a top plate, a bottom plate and two rear end flanges, wherein the top plate is used for connecting a main transmission chain mounting carrier, the bottom plate is used for connecting a yaw system mounting carrier, the two rear end flanges are used for connecting a rear rack, the top plate is arranged at the upper part of the shell, the bottom plate is arranged at the lower part of the shell, a bulge is arranged at the front part of the shell, a front end blast hole used for locking a wind wheel is arranged on the bulge, first extending parts extending towards the rear of the shell are arranged at the left side and the right side of the rear part of the top plate, the two first extending parts are correspondingly connected with the upper parts of the two rear end flanges one by one, second extending parts extending towards the rear of the shell are arranged at the left side. The invention can meet the load requirement of the medium and high power wind turbine generator, the assembly requirement of the transmission chain and the yawing system, and has the advantages of good strength, light weight, low manufacturing cost, good universality and the like.

Description

Wind generating set casting main frame

Technical Field

The invention relates to a wind generating set, in particular to a cast main frame of the wind generating set.

Background

With the continuous maturity of wind power generation technology in China, especially with the increasing incentive of competition of the wind power industry in recent years, the maximum reduction of the power consumption cost becomes the development target of each wind farm owner and each wind power host enterprise. On the premise of meeting the performance requirements of the wind turbine generator, the cost performance of the wind turbine generator can be improved by selecting a proper forming method and a formed structure of each structural part. The main structural components of the high-power generator set comprise a hub, a frame, a shafting, a wind wheel lock disc and the like. The main frame of the wind turbine generator is used as a bearing structure of a main transmission system of the wind turbine generator, almost all loads on the wind turbine generator are transferred to the tower, and supports are provided for the gear box, the generator and other generator structures.

At present, a welding structure is generally adopted in a manufacturing process of a main frame of a wind turbine generator, however, with the increase of power of the wind turbine generator (which can reach megawatt level), the diameter of a main shaft, the power of a gear box and the size of the main shaft can also be increased, a main frame of the welding structure gradually loses the cost advantage, and meanwhile, the structural aspect of the main frame is optimized to meet the installation requirements of a transmission chain, yaw and other parts.

Disclosure of Invention

The main frame of the wind generating set can meet the load requirement of the medium-high power wind generating set, the assembly requirement of a transmission chain and a yaw system, and has the advantages of high strength, light weight, low manufacturing cost and high universality.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a wind generating set casting main frame, includes hollow casing, is used for connecting the roof of final drive chain installation carrier, is used for connecting the bottom plate of driftage system installation carrier and two rear end flanges that are used for connecting the rear portion frame, the roof is located casing upper portion, the bottom plate is located the casing lower part, the casing front portion is equipped with the arch, be equipped with the front end big gun hole that is used for locking the wind wheel in the arch, the roof rear portion left and right sides is equipped with the first extension that extends to the casing rear, two first extension and two rear end flange upper portion one-to-one is connected, the bottom plate left and right sides is equipped with the second extension that extends to the casing rear, two the second extension is connected with two rear end flange lower part one-to-ones, and the anterior left and right sides of roof is equipped with the third extension that extends to.

As a further improvement of the above technical solution: the gearbox is characterized in that a first mounting boss for mounting a front bearing seat is arranged on the third extending portion, second mounting bosses for mounting a rear bearing seat are arranged on the left side and the right side of the top plate, a third mounting boss for mounting elastic support of the gearbox is arranged on the first extending portion, and the first mounting boss, the second mounting boss and the third mounting boss are parallel.

As a further improvement of the above technical solution: the bottom plate in the casing inboard is equipped with the first mounting hole that the multiunit was used for installing the braking of driftage, the bottom plate in casing below is equipped with a plurality of second mounting holes that are used for installing the drive of driftage, multiunit first mounting hole and a plurality of the second mounting hole all arranges along the circumferencial direction, the bottom plate left part be equipped with to the fourth extension that the casing left side extends, the right part be equipped with to the fifth extension that the casing right side extends, the fourth extension with be equipped with the third mounting hole that the multiunit is used for installing the yaw bearing on the fifth extension, each group the third mounting hole all arranges along the circumferencial direction.

As a further improvement of the above technical solution: the upper portion and the lower portion of the shell are both open, channel holes used for being communicated with the inner cavity of the shell are formed in the top plate and the bottom plate, the channel holes in the top plate are located between the first mounting bosses and the second mounting bosses, and the channel holes in the bottom plate are located on the inner side of a circle formed by the first mounting holes in each group.

As a further improvement of the above technical solution: the bottom plate is a horizontal plate, the upper surfaces of the first mounting boss, the second mounting boss and the third mounting boss incline towards the front of the shell, and an included angle between the upper surfaces of the first mounting boss, the second mounting boss and the third mounting boss and the bottom plate is 2-6 degrees.

As a further improvement of the above technical solution: the included angle between the rear end flange and the second extending part is 85-95 degrees.

As a further improvement of the above technical solution: the left and right sides of the shell are provided with vertical plates which extend backwards to the rear end flange at the same side, the upper parts of the vertical plates are connected with the first extending parts at the same side, and the lower parts of the vertical plates are connected with the second extending parts at the same side.

As a further improvement of the above technical solution: the third extension front end with be equipped with first strengthening rib between the arch, the casing first strengthening rib reaches be equipped with the second strengthening rib between the third extension, the second strengthening rib with be equipped with the third strengthening rib between the third extension, be equipped with the fourth strengthening rib along left right direction in the casing, the fourth strengthening rib is located second installation boss below, first extension and homonymy be equipped with the fifth strengthening rib between the second extension.

As a further improvement of the above technical solution: the left side and the right side of the shell and the vertical plates are provided with lightening holes, and the rear portion of the shell is provided with cable holes.

As a further improvement of the above technical solution: the first mounting boss and the second mounting boss are equal in height and lower than the third mounting boss, and the second mounting boss and the third mounting boss are in smooth transition connection through an arc connecting part.

Compared with the prior art, the invention has the advantages that: the cast main frame of the wind generating set disclosed by the invention is formed by adopting a casting process, has good strength, can meet the complex load requirement of a high-power wind generating set in actual work through simulation verification, has a simple process and greatly reduces the manufacturing cost; the hollow shell has a structure with a top plate and a bottom plate, so that the weight is light, and the difficulty in transferring and mounting is reduced; the front part of the shell is provided with a bulge, and a front-end blast hole is formed in the bulge to lock the wind wheel, so that the wind wheel is arranged in the main rack; the bottom plate is used for meeting the assembly requirement of the yaw system, the front part of the top plate is provided with a third extension part extending forwards, and the rear part of the top plate is provided with a first extension part extending backwards, so that the installation requirement of a main transmission chain can be met; the rear part of the bottom plate is provided with a second extending part which extends backwards, the connection between the rear end flange and the main body part is realized by matching with the first extending part on the top plate, and the rear end flange meets the assembly requirement with the rear part rack; meanwhile, the main frame can be used as a basic platform of the wind turbine generator, and can achieve one-type multi-purpose by adjusting local parts, such as wall thickness and the like, according to different wind turbine generator load requirements without changing the topological structure of the main frame, so that the main frame has good universality and expansibility.

Drawings

Fig. 1 is a perspective view of a first view of a cast main frame of a wind turbine generator system according to the present invention.

Fig. 2 is a perspective view of a cast main frame of a wind generating set in a second view.

Fig. 3 is a perspective view of a third view of the cast main frame of the wind generating set of the invention.

Fig. 4 is a schematic structural diagram of relative positions of the first mounting boss, the second mounting boss, the third mounting boss, the base plate and the rear end flange in the present invention.

The reference numerals in the figures denote: 1. a housing; 11. a protrusion; 12. a front-end blast hole; 13. a vertical plate; 14. lightening holes; 15. a cable hole; 2. a top plate; 21. a first extension portion; 22. a third extension portion; 23. a first mounting boss; 24. a second mounting boss; 25. a third mounting boss; 26. a first connection portion; 27. a second connecting portion; 3. a base plate; 31. a second extension portion; 32. a first mounting hole; 33. a second mounting hole; 34. a fourth extension portion; 35. a fifth extension portion; 36. a third mounting hole; 37. a third connecting portion; 4. a rear end flange; 5. a passage hole; 61. a first reinforcing rib; 62. a second reinforcing rib; 63. a third reinforcing rib; 64. a fourth reinforcing rib; 65. fifthly, strengthening the tendons; 7. a circular arc connecting part; 8. the auxiliary component is provided with a boss; 9. and (7) lifting lugs.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

As shown in fig. 1 to 4, the cast main frame of the wind turbine generator system of the embodiment includes a hollow housing 1, a top plate 2 for connecting a main drive chain mounting carrier, a bottom plate 3 for connecting yaw system installation carrier, and two rear end flange 4 that are used for connecting the rear portion frame, 1 upper portion of casing is located to

roof

2, 1 lower part of casing is located to

bottom plate

3, 1 front portion of casing is equipped with arch 11, be equipped with the front end big gun hole 12 that is used for locking the wind wheel on

arch

11, 2 rear portion left and right sides of roof are equipped with the first extension 21 that extends to casing 1 rear, two first extension 21 are connected with two rear end flange 4 upper portions one-to-one, 3 left and right sides of bottom plate are equipped with the second extension 31 that extends to casing 1 rear, two second extensions 31 are connected with two rear end flange 4 lower parts one-to-one, 2 front portion left and right sides of roof are equipped with the third extension 22 that extends to casing 1 the place ahead. Preferably, the shell 1 is boss-shaped, the diameter of the upper end is smaller than that of the lower end, and the upper part of the shell 1 inclines to the front side; the ball-milling cast iron material is adopted for vertical casting molding.

The cast main frame of the wind generating set is formed by adopting a casting process, has good strength, can meet the complex load requirement of a high-power wind generating set in actual work through simulation verification, has simple process and greatly reduces the manufacturing cost; the hollow shell 1 has a structure with a top plate 2 and a bottom plate 3, so that the weight is light, and the difficulty in transportation and installation is reduced; the front part of the shell 1 is provided with a bulge 11, and a front-end blast hole 12 is arranged in the bulge 11 to lock the wind wheel, so that the wind wheel is installed in the main frame (in the embodiment, the wind wheel, a main transmission chain, a yaw system and other components are installed on the main frame through bolts and other fasteners, the same applies below); the bottom plate 3 is used for meeting the assembly requirement of a yaw system, the front part of the top plate 2 is provided with a third extension part 22 extending forwards, and the rear part of the top plate is provided with a first extension part 21 extending backwards, so that the installation requirement of a main transmission chain can be met; a second extension part 31 extending backwards is arranged at the rear part of the bottom plate 3, the connection between the rear end flange 4 and the main body part of the main frame is realized by matching with the first extension part 21 on the top plate 2, and the rear end flange 4 meets the assembly requirement with the rear frame; meanwhile, the main frame can be used as a basic platform of the wind turbine generator, and can achieve one-type multi-purpose by adjusting local parts, such as wall thickness and the like, according to different wind turbine generator load requirements without changing the topological structure of the main frame, so that the main frame has good universality and expansibility.

As a further preferable technical solution, in this embodiment, the third extending portion 22 is provided with a first mounting boss 23 for mounting a front bearing seat, the left and right sides of the top plate 2 are provided with second mounting bosses 24 for mounting a rear bearing seat, the first extending portion 21 is provided with a third mounting boss 25 for mounting an elastic support of a gear box, and the first mounting boss 23, the second mounting boss 24 and the third mounting boss 25 are parallel. Due to the arrangement of the first mounting bosses 23 and the second mounting bosses 24, the main frame is particularly suitable for carrying a two-point supporting main transmission chain in addition to a single-point supporting main transmission chain.

As a further preferable technical solution, in this embodiment, the bottom plate 3 is provided with a plurality of sets of first mounting holes 32 for mounting yaw brake on the inner side of the casing 1 (that is, the diameter of the circle formed by the sets of first mounting holes 32 on the bottom plate 3 is smaller than the diameter of the lower part of the casing 1), a plurality of second mounting holes 33 for mounting yaw drive are provided below the casing 1 on the bottom plate 3, the plurality of sets of first mounting holes 32 and the plurality of second mounting holes 33 are all arranged along the circumferential direction, the left part of the bottom plate 3 is provided with a fourth extending part 34 extending to the left side of the casing 1, the right part is provided with a fifth extending part 35 extending to the right side of the casing 1, the fourth extending part 34 and the fifth extending part 35 are provided with a plurality of sets of third mounting holes 36 for mounting a yaw bearing, and the holes of the sets of third mounting holes 36 are. Specifically, the first mounting holes 32 are arranged in eight groups, the second mounting holes 33 are uniformly distributed along the circumferential direction, the fourth extending portion 34 and the fifth extending portion 35 are provided with three groups of third mounting holes 36, and the centers of circles of the six groups of third mounting holes 36 are located on the same circumference. The arrangement of the first mounting hole 32, the second mounting hole 33 and the third mounting hole 36 on the bottom plate 3 can be flexibly adjusted and configured according to different loads borne by the wind turbine generator.

As a further preferable technical scheme, in the embodiment, the upper part and the lower part of the shell 1 are both open, and the top plate 2 and the bottom plate 3 are both provided with the channel holes 5 for communicating with the inner cavity of the shell 1, so that a channel for connecting the tower and the engine room can be formed on the main frame, and operating personnel, tools and spare parts can enter the engine room from the tower through the channel, thereby improving the convenience and reducing the quality of the main frame; further, the passage hole 5 of the top plate 2 is located between the first mounting boss 23 and the second mounting boss 24, and the passage hole 5 of the bottom plate 3 is located inside the circle formed by the respective sets of the first mounting holes 32.

As a further preferable technical solution, the bottom plate 3 is a horizontal plate, and the upper surfaces of the first mounting boss 23, the second mounting boss 24 and the third mounting boss 25 are inclined to the front of the housing 1 and form an angle of 2 ° to 6 ° with the bottom plate 3. The setting of this contained angle satisfies the holistic load design requirement of main frame on the one hand, and on the other hand can avoid apex and tower section of thick bamboo to bump after the wind turbine generator system accomplishes the assembly. In this embodiment, the angle is preferably 5 °, and in other embodiments, the angle can be adjusted within a small range.

As a further preferred technical scheme, an included angle between the rear end flange 4 and the second extension part 31 is 85-95 degrees, and the included angle can meet the overall load design requirement of the main frame on one hand and meet the cantilever connection requirement of the generator on the other hand. In this embodiment, the included angle is preferably 90 °, and in other embodiments, the included angle can be adjusted within a small range.

As a further preferable technical solution, in this embodiment, a first connecting portion 26 is disposed between the first mounting bosses 23 on the left and right sides, a second connecting portion 27 is disposed between the second mounting bosses 24 on the left and right sides, the first connecting portion 26 and the second connecting portion 27 are of an arc structure with a concave middle portion, a third connecting portion 37 is disposed between the second extending portions 31 on the left and right sides, the third connecting portion 37 is of an arc structure with a concave front middle portion, vertical plates 13 extending backwards to the rear end flanges 4 on the same side are disposed on the left and right sides of the rear portion of the housing 1, upper portions of the vertical plates 13 are connected to the first extending portions 21 on the same side, and lower portions of the vertical plates are connected to the second extending portions. The arrangement of the first connecting part 26, the second connecting part 27 and the third connecting part 37 can improve the overall rigidity of the main frame, thereby improving the overall bending resistance of the main frame; the arrangement of the vertical plate 13 can increase the connection strength of the whole main frame, especially the connection strength between the rear end flange 4 and the main frame main body part.

As a more preferable configuration, in the present embodiment, a first rib 61 is provided between the front end of the third extending portion 22 and the boss 11, a second rib 62 is provided between the housing 1, the first rib 61 and the third extending portion 22, a third rib 63 is provided between the second rib 62 and the third extending portion 22, a fourth rib 64 is provided in the housing 1 along the left-right direction, the fourth rib 64 is located below the second mounting boss 24, and a fifth rib 65 is provided between the first extending portion 21 and the second extending portion 31 on the same side. The number and the arrangement positions of the reinforcing ribs need to be considered comprehensively, so that the strength and the rigidity of the main frame can be reliably improved, the main frame can bear the complex load of the wind turbine generator, the quality of the main frame is prevented from being excessively increased, and the requirements of the main frame and the installation of each component on the main frame are not influenced. The arrangement of the first rib 61, the second rib 62, the third rib 63, the fourth rib 64, and the fifth rib 65 can satisfy the requirements through repeated simulation, calculation, and verification.

In a more preferable embodiment, weight-reduction holes 14 are provided in both the left and right sides of the casing 1 and the vertical plate 13, and a cable hole 15 is provided in the rear portion of the casing 1. The lightening holes 14 reduce the mass of the main frame under the condition of not influencing the integral strength and rigidity of the main frame, and can be used as casting holes; the cable holes 15 are preferably oval holes and can be used as lightening holes 14 and casting process holes.

In a further preferred embodiment, the first mounting boss 23 and the second mounting boss 24 are equal in height and lower than the third mounting boss 25, and the second mounting boss 24 and the third mounting boss 25 are smoothly transitionally connected by the arc connecting portion 7. The first mounting boss 23, the second mounting boss 24 are equal in height and lower than the third mounting boss 25, so that the integral torsion resistance of the main frame can be improved and the bearing capacity can be improved on the premise of meeting the mounting requirement of the main transmission chain; the second mounting boss 24 and the third mounting boss 25 are connected in a smooth transition mode through the arc connecting portion 7, and stress concentration can be avoided.

As a more preferable technical solution, in the present embodiment, the top plate 2 is further provided with a pair of lifting lugs 9 and an auxiliary member mounting boss 8. The pair of lifting lugs 9 is convenient for integral hoisting and transferring of the main frame; the auxiliary component mounting boss 8 can be used for mounting auxiliary components such as a stand column, a lubricating system, a cable clamp and the like. Preferably, the pair of lifting lugs 9 are located outside the front ends of the pair of second mounting bosses 24, that is, the pair of second mounting bosses 24 are located between the pair of lifting lugs 9, which is beneficial to keeping the overall balance of the main frame during the hoisting process.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. The utility model provides a wind generating set casts main frame which characterized in that: the wind wheel yaw system comprises a hollow shell (1), a top plate (2) used for connecting a main transmission chain installation carrier, a bottom plate (3) used for connecting a yaw system installation carrier and two rear end flanges (4) used for connecting a rear rack, wherein the top plate (2) is arranged on the upper portion of the shell (1), the bottom plate (3) is arranged on the lower portion of the shell (1), a bulge (11) is arranged on the front portion of the shell (1), a front end blast hole (12) used for locking a wind wheel is formed in the bulge (11), first extending portions (21) extending towards the rear of the shell (1) are arranged on the left side and the right side of the rear portion of the top plate (2), the two first extending portions (21) are connected with the upper portions of the rear end flanges (4) in a one-to-one correspondence manner, second extending portions (31) extending towards the rear of the shell (1) are arranged on the left side and the right side of the bottom plate (3), and the second extending, the left side and the right side of the front portion of the top plate (2) are provided with third extending portions (22) extending towards the front of the shell (1), the third extending portions (22) are provided with first mounting bosses (23) used for mounting a front bearing seat, the left side and the right side of the top plate (2) are provided with second mounting bosses (24) used for mounting a rear bearing seat, the first extending portions (21) are provided with third mounting bosses (25) used for mounting elastic supports of a gear box, the first mounting bosses (23), the second mounting bosses (24) are parallel to the third mounting bosses (25), and the first mounting bosses (23), the second mounting bosses (24) are equal in height and lower than the third mounting bosses (25).

2. The wind generating set cast mainframe according to claim 1, wherein: the bottom plate (3) in casing (1) inboard is equipped with the first mounting hole (32) that the multiunit was used for installing the braking of yawing, bottom plate (3) in casing (1) below is equipped with a plurality of second mounting holes (33) that are used for installing the yaw drive, multiunit first mounting hole (32) and a plurality of second mounting hole (33) all arrange along the circumferencial direction, bottom plate (3) left part be equipped with to fourth extension (34) that casing (1) left side extended, the right part be equipped with to fifth extension (35) that casing (1) right side extended, fourth extension (34) with be equipped with multiunit third mounting hole (36) that are used for installing the yaw bearing on fifth extension (35), each group third mounting hole (36) all arrange along the circumferencial direction.

3. The wind generating set cast mainframe of claim 2 wherein: the upper portion and the lower portion of the shell (1) are open, the top plate (2) and the bottom plate (3) are provided with channel holes (5) used for being communicated with the inner cavity of the shell (1), the channel holes (5) in the top plate (2) are located between the first mounting bosses (23) and the second mounting bosses (24), and the channel holes (5) in the bottom plate (3) are located on the inner side of a circle formed by the first mounting holes (32).

4. The wind generating set cast mainframe according to claim 1, wherein: the bottom plate (3) is a horizontal plate, the upper surfaces of the first mounting boss (23), the second mounting boss (24) and the third mounting boss (25) incline towards the front of the shell (1) and an included angle between the upper surfaces of the first mounting boss, the second mounting boss and the third mounting boss and the bottom plate (3) is 2-6 degrees.

5. The wind turbine generator system cast mainframe of claim 4 wherein: the included angle between the rear end flange (4) and the second extension part (31) is 85-95 degrees.

6. The wind turbine generator system cast mainframe according to any of the claims 1-5, wherein: first connecting portions (26) are arranged between the first mounting bosses (23) on the left side and the right side, second connecting portions (27) are arranged between the second mounting bosses (24) on the left side and the right side, the first connecting portions (26) and the second connecting portions (27) are of arc-shaped structures with concave middle portions, third connecting portions (37) are arranged between the second extending portions (31) on the left side and the right side, the third connecting portions (37) are of arc-shaped structures with concave front middle portions, vertical plates (13) extending backwards to the rear end flanges (4) on the same side are arranged on the left side and the right side of the rear portion of the shell (1), the upper portions of the vertical plates (13) are connected with the first extending portions (21) on the same side, and the lower portions of the vertical plates are connected with the second extending portions (11).

7. The wind generating set cast mainframe of claim 6 wherein: third extension (22) front end with be equipped with first strengthening rib (61) between arch (11), casing (1) first strengthening rib (61) reaches be equipped with second strengthening rib (62) between third extension (22), second strengthening rib (62) with be equipped with third strengthening rib (63) between third extension (22), be equipped with fourth strengthening rib (64) along left right direction in casing (1), fourth strengthening rib (64) are located second installation boss (24) below, first extension (21) and homonymy be equipped with fifth strengthening rib (65) between second extension (31).

8. The wind generating set cast mainframe of claim 6 wherein: lightening holes (14) are formed in the left side and the right side of the shell (1) and the vertical plate (13), and cable holes (15) are formed in the rear portion of the shell (1).

9. The wind turbine generator system cast mainframe according to any of the claims 1-5, wherein: the second mounting boss (24) and the third mounting boss (25) are in smooth transition connection through an arc connecting part (7).