Motor base structure capable of effectively increasing overall rigidity of motor

Abstract

The invention discloses a motor base structure capable of effectively increasing the overall rigidity of a motor, and relates to the technical field of doubly-fed asynchronous wind driven generator manufacturing, the motor base structure is mainly composed of a wall plate, two end plates, two partition plates, an iron core supporting block, a middle cross beam, a side edge bottom plate, a middle bottom plate and bottom feet, the wall plate is formed by bending a steel plate with the thickness of 8 mm, and the middle cross beam is formed by bending a steel plate with the thickness of 8 mm. The two end plates and the two partition plates serve as main bearing parts, are all made of steel plates with the thickness of 30 mm and are welded with the wall plates to jointly form a machine base main body structure. The motor base structure provided by the invention has extremely high universality, and the whole traditional middle partition plate is divided into four iron core supporting blocks, so that not only is the fixed support of the stator iron core met, but also the vibration of the stator iron core can be dispersed and transmitted to the motor base through the four iron core supporting blocks; and secondly, although the wall plate of the engine base is thinned, the amplitude of the wall plate of the engine base is reduced through the square steel reinforcing structure.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing double-fed asynchronous wind generators, and in particular to a base structure for effectively increasing the overall rigidity of a motor. Background Art

[0002] Doubly-fed asynchronous wind turbines are currently the most widely used high-power wind turbines. They are mainly composed of two parts: the motor body and the cooling system. The stator, rotor and bearing system form the motor body, and the cooling system is divided into three structures: water cooling, air-to-air cooling and air-to-water cooling.

[0003] In the context of rising cost pressure in the wind power industry, it is more urgent to reduce the cost of high-power wind turbines. At present, the generator base, as one of the main components, accounts for about one-tenth of the total machine weight, and there is a lot of room for cost reduction. Therefore, the present invention proposes a base structure that effectively increases the overall rigidity of the motor. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a base structure that effectively increases the overall rigidity of the motor, meets the needs of weight reduction and cost reduction by reducing the wall thickness, and solves the problem of insufficient base rigidity by local reinforcement, thereby providing a new structural technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A base structure that effectively increases the overall rigidity of a motor, mainly consisting of a wall plate, two end plates, two partitions, an iron core support block, a middle crossbeam, a side bottom plate, a middle bottom plate and a bottom foot;

[0007] The wall plate is made of 8mm thick steel plate, which is conducive to enhancing the overall rigidity of the machine base. The two end plates and two partitions are the main load-bearing components, all of which are made of 30mm thick steel plates and welded with the wall plate to form the main structure of the machine base.

[0008] The main structure of the machine base is provided with a machine base middle chamber, the core support block is welded in the machine base middle chamber, and the first square steel is welded at the middle position of the inner wall on both sides of the machine base middle chamber, which can effectively increase the rigidity of the machine base wall plate and overcome the bending deformation caused by the large span between the two partitions;

[0009] Two second square steels are welded to the upper part of the end plate and penetrate through both sides of the base wall panel. At the same time, the two second square steels are respectively welded to the two partitions, thereby improving the rigidity of the overall structure of the base. Two third party steels are also welded to the upper part of the end plate, and the middle crossbeam is divided into three sections and welded between the wall panel and the two third party steels.

[0010] As a preferred technical solution of the present invention, there are four core support blocks with a thickness of 20 mm, three of which are welded on the middle bottom plate, and the other is welded on the middle cross beam just above.

[0011] As a preferred technical solution of the present invention, the two second-party steels are distributed transversely, and the two third-party steels are distributed longitudinally.

[0012] As a preferred technical solution of the present invention, the two first square steels have the same model and length, the two second square steels have the same model and length, and the two third square steels have the same model and length.

[0013] As a preferred technical solution of the present invention, the base foot is made of 53mm thick steel plate. While strengthening the thickness of the base foot, supporting ribs are directly added to the end plate and partition, which can disperse the load of the base foot on the partition and end plate and strengthen the base foot support rigidity.

[0014] As a preferred technical solution of the present invention, the middle bottom plate and the side bottom plate are bent structures, the middle bottom plate is directly welded to the wall plate, and the side bottom plate and the wall plate are welded to the base to form an indirect connection, so that the vertical to horizontal transition is smooth through the inclined surface, which can improve the internal ventilation structure of the base, thereby reducing wind resistance, reducing local losses in the wind path, and ensuring ventilation and heat dissipation of the motor.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention adopts four 20mm thick iron core support blocks and an intermediate cross beam to replace the traditional whole middle partition. The load of the stator core can be transferred to the two partitions and four iron core support blocks, and then transferred to the base foot through the intermediate cross beam and the base wall plate, which reduces the overall weight of the base and ensures the stability and reliability of the stator core fixing structure;

[0017] 2. The base structure proposed in the present invention has extremely strong versatility. The entire traditional middle partition is divided into four core support blocks. On the one hand, it satisfies the fixed support of the stator core. On the other hand, the vibration of the stator core can be dispersedly transmitted to the base through the four core support blocks, avoiding the concentrated transmission of vibration to the partition to cause weld tearing or base deformation, which reduces the requirements for the partition to a certain extent. Secondly, although the base wall panel is thinner, the amplitude of the base wall panel is reduced by strengthening the structure with square steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] In the figure: 1. first square steel; 2. end plate; 3. partition; 4. wall plate; 5. second square steel; 6. third party steel; 7. middle cross beam; 8. middle chamber of machine base; 9. bottom foot; 10. side bottom plate; 11. supporting rib plate; 12. core support block; 13. middle bottom plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Example

[0023] Reference Figure 1 , a base structure that effectively increases the overall rigidity of the motor, including mainly a wall plate 4, two end plates 2, two partitions 3, a core support block 12, an intermediate cross beam 7, a side bottom plate 10, an intermediate bottom plate 13 and a foot 9. This embodiment is based on the technical improvement of the traditional base structure, while removing the intermediate partition, reducing the base wall thickness, and strengthening the structure of some key parts with large spans such as the foot 9;

[0024] In this embodiment, the wall plate 4 is formed by bending an 8 mm thick steel plate, which is beneficial to enhancing the overall rigidity of the machine base. The two end plates 2 and the two partition plates 3 are the main load-bearing components, all of which are made of 30 mm thick steel plates and are welded with the wall plate 4 to form the main structure of the machine base.

[0025] In this embodiment, a machine base middle chamber 8 is provided in the machine base main structure, and the core support block 12 is welded in the machine base middle chamber 8. The first square steel 1 is welded at the middle position of the inner wall on both sides of the machine base middle chamber 8, which can effectively increase the rigidity of the machine base wall plate 4 and overcome the bending deformation caused by the large span between the two partitions 3;

[0026] In this embodiment, two second square steels 5 are welded to the upper part of the end plate 2 and penetrate the two sides of the base wall plate 4. At the same time, the two second square steels 5 are also welded to the two partitions 3 respectively, which improves the rigidity of the overall structure of the base. Two third party steels 6 are also welded to the upper part of the end plate 2. The middle crossbeam 7 is welded in three sections between the wall plate 4 and the two third party steels 6.

[0027] In this embodiment, there are four core support blocks 12 with a thickness of 20 mm, three of which are welded on the middle bottom plate 13, and the other is welded on the middle cross beam 7 directly above. Four 20 mm thick core support blocks 12 and the middle cross beam 7 are used to replace the traditional whole middle partition plate. The load of the stator core can be transferred to the two partition plates 3 and the four core support blocks 12, and then transferred to the base foot 9 through the middle cross beam 7 and the base wall plate 4, which reduces the overall weight of the base and ensures the stability and reliability of the stator core fixing structure.

[0028] In this embodiment, the two second square steels 5 are distributed horizontally, the two third party steels 6 are distributed vertically, the two first square steels 1 are of the same model and length, the two second square steels 5 are of the same model and length, and the two third party steels 6 are of the same model and length;

[0029] In this embodiment, the machine base foot 9 is made of 53mm thick steel plate. While strengthening the thickness of the foot 9, a supporting rib plate 11 is directly added to the end plate 2 and the partition plate 3, which can disperse the load of the foot 9 on the partition plate 3 and the end plate 2 and strengthen the supporting rigidity of the foot 9;

[0030] In this embodiment, the middle bottom plate 13 and the side bottom plate 10 are bent structures, the middle bottom plate 13 is directly welded to the wall plate 4, and the side bottom plate 10 and the wall plate 4 are welded to the foot 9 to form an indirect connection, so that the vertical to horizontal transition is smooth through the inclined surface, which can improve the internal ventilation structure of the base, thereby reducing wind resistance, reducing local losses in the wind path, and ensuring ventilation and heat dissipation of the motor;

[0031] The base structure proposed in this embodiment has extremely strong versatility. The entire traditional middle partition is divided into four core support blocks 12. On the one hand, it satisfies the fixed support of the stator core. On the other hand, the vibration of the stator core can be dispersedly transmitted to the base through the four core support blocks 12, avoiding the concentrated transmission of vibration to the partition 3 to cause weld tearing or base deformation, which reduces the requirements for the partition 3 to a certain extent. Secondly, although the base wall panel 4 is thinned, the amplitude of the base wall panel 4 is reduced by the square steel reinforcement structure.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A base structure that effectively increases the overall rigidity of a motor, characterized in that: It is mainly composed of a wall plate (4), two end plates (2), two partition plates (3), an iron core support block (12), an intermediate cross beam (7), a side bottom plate (10), an intermediate bottom plate (13) and a foot (9); The wall plate (4) is formed by bending an 8 mm thick steel plate, which is conducive to enhancing the overall rigidity of the machine base. The two end plates (2) and the two partition plates (3) are the main load-bearing components, all of which are made of 30 mm thick steel plates and are welded with the wall plate (4) to form the main structure of the machine base. The main structure of the machine base is provided with a machine base middle chamber (8), the core support block (12) is welded in the machine base middle chamber (8), and the first square steel (1) is welded at the middle position of the inner wall on both sides of the machine base middle chamber (8), which can effectively increase the rigidity of the machine base wall plate (4) and overcome the bending deformation caused by the large span between the two partitions (3); Two second square steels (5) are welded to the upper part of the end plate (2) and penetrate through both sides of the machine base wall plate (4). At the same time, the two second square steels (5) are respectively welded to the two partition plates (3), thereby improving the rigidity of the overall structure of the machine base. Two third party steels (6) are also welded to the upper part of the end plate (2), and the middle cross beam (7) is welded in three sections between the wall plate (4) and the two third party steels (6).

2. A base structure for effectively increasing the overall rigidity of a motor according to claim 1, characterized in that: The number of the core support blocks (12) is four, and the thickness is 20 mm, three of which are welded to the middle bottom plate (13), and the other is welded to the middle cross beam (7) just above.

3. A base structure for effectively increasing the overall rigidity of a motor according to claim 1, characterized in that: The two second square steels (5) are distributed in a transverse direction, and the two third square steels (6) are distributed in a longitudinal direction.

4. A base structure for effectively increasing the overall rigidity of a motor according to claim 1, characterized in that: The two first square steels (1) are of the same model and length, the two second square steels (5) are of the same model and length, and the two third square steels (6) are of the same model and length.

5. The base structure for effectively increasing the overall rigidity of a motor according to claim 1, characterized in that: The base foot (9) is made of a 53 mm thick steel plate. While the thickness of the base foot (9) is enhanced, a supporting rib plate (11) is directly added to the end plate (2) and the partition plate (3), which can disperse the load of the base foot (9) on the partition plate (3) and the end plate (2) and enhance the supporting rigidity of the base foot (9).

6. A base structure for effectively increasing the overall rigidity of a motor according to claim 1, characterized in that: The middle bottom plate (13) and the side bottom plate (10) are of a bent structure. The middle bottom plate (13) is directly welded to the wall plate (4), and the side bottom plate (10) and the wall plate (4) are welded to the foot (9) to form an indirect connection, so that the vertical to the horizontal transition is smooth through the inclined surface, which can improve the internal ventilation structure of the machine base, thereby reducing wind resistance, reducing local losses in the wind path, and ensuring ventilation and heat dissipation of the motor.

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