Shaft structure of wind driven generator

Abstract

The utility model discloses a shaft structure of a wind driven generator, which comprises a motor shaft and discs, the discs comprise a first disc and a second disc, the first disc and the second disc are respectively sleeved at one end of the motor shaft in parallel, the first disc is positioned at a position far away from the end part of the motor shaft, and the second disc is positioned at a position close to the end part of the motor shaft. A common reinforcing rib is arranged between the first disc and the second disc, and the reinforcing rib penetrates through the space between the two discs; a second flange connected with a hub is arranged on the inner circle face of the first disc, and a first flange connected with a generator rotor is arranged on the outer circle face of the first disc. And bearing mounting surfaces are respectively arranged on the inner circular surfaces at two ends of the motor shaft. By means of the double-disc single-reinforcing-rib structure, the two discs share the same set of reinforcing ribs, the whole structure is compact, rigidity is high, the weight is light, and economical efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind driven generator technical field, concretely relates to a kind of shaft structure of wind driven generator. BACKGROUND

[0002] As the pivot link of mechanical transmission architecture, shaft is responsible for the key power and motion transmission task, and plays an irreplaceable role in many cutting-edge fields such as wind power generation, automobile industry, marine vessels and aerospace. However, with the development of wind turbine generator set towards large-scale and lightweight, higher requirements are put forward for the design standard of motor shaft. The continuous increase of wind turbine generator set rotor diameter directly increases the wind load borne by the shaft component, exposing the fundamental limitations of traditional shaft design - not only showing insufficient in strength performance, but also being short of rigidity requirement. When facing the increasing external dynamic load, the traditional material selection and structure design can not ensure the reliability and efficiency of long-term operation, leading to the increase of potential structural failure risk, and limiting the development pace of large-scale and high-efficiency equipment.

[0003] The utility model patent with patent publication number CN 207315843 U discloses a shaft component and wind turbine generator set, but the shaft component in the patent is single-disc structure, and the shaft body is long in axial direction, so that the axial space of the set is not compact enough, and the weight of the set is relatively heavy. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of shaft structure of wind driven generator, by setting double-disc single reinforcing rib structure on main shaft, overall structure is compact, save space, reduce the overall cost of set.

[0005] In order to realize the above-mentioned invention purpose, the technical scheme of the utility model is as follows:

[0006] A kind of shaft structure of wind driven generator, including motor shaft and disc, disc includes first disc and second disc, first disc and second disc are respectively parallel and set on one side of motor shaft, first disc is located at the position away from the end of motor shaft, second disc is located at the position close to the end of motor shaft, reinforcing rib is provided between first disc and second disc, reinforcing rib penetrates between two discs;The inner circular surface of the first disc is provided with the second flange connected with the hub, and the outer circular surface of the first disc is provided with the first flange connected with the generator rotor;The inner circular surface of the two ends of motor shaft is provided with bearing mounting surface respectively.

[0007] The end of the motor shaft away from the disc is provided with a plurality of brake disc mounting bosses, and the boss is provided with connecting screw hole for fixing brake disc;The boss is used for installing brake disc, and the overall weight of the shaft is reduced.

[0008] The second disc side is uniformly provided with a plurality of locking pin seats in the circumferential direction, the locking pin seats are bolted on the second disc, and locking requirements of the unit in different circumferential directions can be met; the locking pin seats can be made of materials with better performance than the shaft material, the safety requirement of the unit is met, and the material utilization rate is improved, and the economy of the unit is improved.

[0009] The reinforcing rib is drawn out along the inner side to the outer side of the disc, and the drawing angle is less than 4°.

[0010] The reinforcing rib is provided with a weight-reducing hole.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1. In the utility model, through the double-disc single-reinforcing-rib structure, the two discs share the same set of reinforcing ribs, the overall structure is compact, the rigidity is strong, the weight is light, and the economy is high.

[0013] 2. In the utility model, the first disc is provided with a first flange and a second flange, the second flange is connected with the hub through bolts, the transmission of the wind load is realized, the first flange is connected with the generator rotor through bolts, and support is provided for the generator rotor. A plurality of locking pin seats are uniformly arranged on the second disc in the circumferential direction, and the locking requirement of the unit is met. The first disc and the second disc share the same set of reinforcing ribs, the rigidity of the two discs is improved, the overall size of the shaft structure is reduced, the weight of the shaft structure is further reduced, the reliability and economy of the shaft structure are improved.

[0014] 3. In the utility model, the two discs share the same set of reinforcing ribs, the reinforcing rib has a certain drawing angle in the radial direction, the angle is < 4°, and the setting of the drawing angle is beneficial to demolding after the shaft structure is cast, and the casting reliability is improved.

[0015] 4. In the utility model, the reinforcing rib is provided with a weight-reducing hole at the middle position, the weight of the shaft structure is further reduced under the condition of meeting the use requirement. DRAWINGS

[0016] Fig. 1 It is a schematic view of the shaft structure of the wind driven generator of the utility model.

[0017] Fig. 2 It is a side view of the shaft structure of the wind driven generator of the utility model.

[0018] Fig. 3 It is a sectional view of the shaft structure of the wind driven generator of the utility model.

[0019] 1, first disc; 2, second disc; 3, motor shaft; 4, first flange; 5, second flange; 6, bearing mounting surface; 7, boss; 8, reinforcing rib; 9, locking pin seat; 10, weight-reducing hole. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0021] Example 1

[0022] like Figs. 1-3 As shown, this embodiment provides a shaft structure for a wind turbine, including a motor shaft 3 and a disc. The disc includes a first disc 1 and a second disc 2, which are respectively mounted parallel to each other on one side of the motor shaft 3. The first disc 1 is located away from the end of the motor shaft 3, and the second disc 2 is located near the end of the motor shaft 3. A common reinforcing rib 8 is provided between the first disc 1 and the second disc 2, and the reinforcing rib 8 passes through the space between the two discs. A second flange 5 for connecting to the hub is provided on the inner circular surface of the first disc 1, and a first flange 4 for connecting to the generator rotor is provided on the outer circular surface of the first disc 1. Bearing mounting surfaces 6 are respectively provided on the inner circular surfaces at both ends of the motor shaft 3.

[0023] In this embodiment, a first flange 4 and a second flange 5 are provided on the first disc. The second flange 5 is connected to the hub by bolts, realizing the transmission of wind load. The first flange 4 is connected to the generator rotor by bolts, providing support for the generator rotor. The inner circles at both ends of the shaft structure are respectively provided with an upper wind bearing support surface and a lower wind bearing support surface, providing support for the bearings. A common reinforcing rib 8 is provided between the first disc 1 and the second disc 2. The reinforcing rib 8 provides rigidity support for both the first disc 1 and the second disc 2, thereby improving the overall rigidity of the shaft structure and meeting the design requirements of the component.

[0024] Example 2

[0025] Compared with Embodiment 1, the difference in this embodiment is that, in this embodiment, the end of the motor shaft 3 away from the disc is provided with a plurality of brake disc mounting bosses 7, and the bosses 7 are provided with connecting screw holes for fixing the brake discs; the rest of the structure is the same as in Embodiment 1.

[0026] In this embodiment, the brake boss 7 is used to mount the brake disc. The brake boss 7 and the brake disc are connected by bolts. When braking, the brake caliper grips the brake disc, reducing the generator speed through friction, thus achieving the generator's braking function. Compared to the solid circular flange structure, the design of the brake boss 7 reduces the weight of the shaft structure and improves economy while meeting usage requirements.

[0027] Example 3

[0028] Compared with Embodiment 1, the difference in this embodiment is that, in this embodiment, 12 locking pin seats 9 are evenly arranged on the side of the second disk 2 along the circumferential direction. The locking pin seats 9 are fastened to the second disk 2 by bolts. The rest of the structure is the same as in Embodiment 1.

[0029] In the embodiment, the second disc 2 is provided with a locking pin seat 9, the locking pin seat 9 is bolted on the second disc 2, when the unit is locked, the locking pin is put into the locking seat under the control of the hydraulic system, the rotating part of the generator is locked, the rotation of the rotating part of the generator is prevented, and the locking function of the unit is realized.

[0030] In the embodiment, the arrangement of the plurality of locking seats around the circumference meets the locking requirement of the unit in different directions around the circumference.

[0031] Embodiment 4

[0032] Compared with the embodiment 1, the difference lies in that, in the embodiment, the reinforcing rib 8 is drawn out along the inside to the outside of the disc, the draw-out angle is less than 4°, the reinforcing rib 8 is provided with a weight-reducing hole 10, and the rest structure is the same as that of the embodiment 1.

[0033] In the embodiment, the two discs share the same set of reinforcing ribs 8, the reinforcing rib 8 has a certain draw-out angle in the radial direction, the angle is less than 4°, the setting of the draw-out angle is beneficial to the demolding of the shaft structure after casting, and the casting reliability is improved, the weight-reducing hole 10 is arranged at the middle position of the reinforcing rib 8, the weight of the shaft structure is further reduced under the condition of meeting the use requirement.

[0034] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all the embodiments falling within the scope of the claims of the application belong to the range protected by the utility model.

Claims

1. A shaft structure of a wind power generator comprising a motor shaft (3) and a disc, characterized in that: The disc comprises a first disc (1) and a second disc (2), the first disc (1) and the second disc (2) are respectively sleeved on one side of the motor shaft (3) in parallel, the first disc (1) is located at a position away from the end of the motor shaft (3), the second disc (2) is located at a position close to the end of the motor shaft (3), a reinforcing rib (8) shared by the first disc (1) and the second disc (2) is arranged between the first disc (1) and the second disc (2), and the reinforcing rib (8) penetrates between the two discs; a second flange (5) connected with a wheel hub is arranged on the inner circular surface of the first disc (1), and a first flange (4) connected with a generator rotor is arranged on the outer circular surface of the first disc (1); the inner circular surfaces of the two ends of the motor shaft (3) are respectively provided with bearing mounting surfaces (6).

2. The shaft structure of a wind power generator according to claim 1, characterized in that: A plurality of brake disc mounting bosses (7) are arranged on the end of the motor shaft (3) away from the disc.

3. A shaft structure for a wind power generator according to claim 2, characterized in that: The boss (7) is provided with a connecting screw hole for fixing the brake disc.

4. The shaft structure of a wind power generator according to claim 1, characterized in that: A plurality of lock pin seats (9) are uniformly arranged on the side surface of the second disc (2) in the circumferential direction.

5. A shaft structure for a wind power generator according to claim 4, characterized in that: The lock pin seat (9) is bolted on the second disc (2).

6. The shaft structure of a wind power generator according to claim 1, characterized in that: The reinforcing rib (8) is drawn out from the inside of the disc to the outside.

7. A shaft structure for a wind power generator according to claim 6, characterized in that: The angle of the drawing-out is less than 4°.

8. The shaft structure of a wind power generator according to claim 1, characterized in that: The reinforcing rib (8) is provided with a weight-reducing hole (10).

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