Novel wind driven generator cabinet

Abstract

The utility model discloses a novel wind driven generator cabinet which comprises a cabinet body, a power input shaft, a first planetary gear set, a second planetary gear set, a first generator and a second generator. The input end of the power input shaft is connected with a wind turbine, and a sun gear coaxially connected with the output end of the power input shaft is meshed with a first sun gear on a center shaft of the first planetary gear set and a second sun gear on a center shaft of the second planetary gear set. A first planet carrier of the first planetary gear set is meshed with a gear on a rotor of the first generator through a gear on the first output shaft, and a second planet carrier of the second planetary gear set is meshed with a gear on a rotor of the second generator through a gear on the second output shaft. The two-stage speed increasing design is adopted, the rotating speed and power distribution are optimized stage by stage, the wind energy utilization rate is increased, the working condition application range is expanded, meanwhile, the structural compactness and the system reliability are both considered, and the method is a key innovation for breaking through the traditional single-path transmission efficiency bottleneck.

Description

TECHNICAL FIELD

[0001] The utility model relates to a generator cabinet, especially a novel wind driven generator cabinet. BACKGROUND

[0002] As an important form of clean energy, the optimization of the core equipment of wind driven generator cabinet is of great significance to improve the efficiency of wind energy conversion. The traditional small and medium-sized wind power generation system adopts a single turbine driving a single generator architecture, which matches the turbine speed with the rated speed of the generator through a gear box. However, due to the instability of wind resources, the single transmission path has obvious defects when dealing with wide range of wind speed changes: in the low wind speed section, the generator cannot be cut into working state due to the fixed gear ratio, while in the high wind speed section, the speed needs to be limited by the brake device, causing energy waste.

[0003] Although there are multiple generator parallel schemes in the prior art, independent transmission chains or external gearboxes are generally used, resulting in large system size and increased transmission loss. Some improved schemes attempt to set multiple speed change mechanisms in the gear box, but the complexity of the structure is too high to affect the reliability. Planetary gear sets have mature applications in the field of hybrid power due to their high power density and multiple power branch characteristics, but there is no mature integrated dual-path transmission scheme in the field of wind power generation.

[0004] Therefore, it is urgent to develop a new type of generator cabinet with compact structure and energy efficiency optimization, which realizes multi-working condition adaptive power generation under single turbine driving through innovative power distribution design, breaking through the efficiency bottleneck of traditional single-path transmission. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides a novel wind driven generator cabinet.

[0006] In order to solve the above technical problems, the utility model adopts the technical scheme of: a novel wind driven generator cabinet, characterized by comprising a cabinet body, a power input shaft rotatingly arranged in the cabinet body, a first planetary gear set, a second planetary gear set, a first generator and a second generator.

[0007] The input end of the power input shaft is connected with a wind turbine, and the output end of the power input shaft is coaxially connected with a central gear, which is engaged with a first sun gear on the central shaft of the first planetary gear set and a second sun gear on the central shaft of the second planetary gear set.

[0008] The first planetary carrier of the first planetary gear set is engaged with the gear on the rotor of the first generator through the gear on the first output shaft, and the second planetary carrier of the second planetary gear set is engaged with the gear on the rotor of the second generator through the gear on the second output shaft.

[0009] Further, the power input shaft is rotatably arranged in the cabinet body through at least two groups of bearing seats, the bearing seats are fixed to the bottom wall of the cabinet body and are spaced along the axial direction of the power input shaft.

[0010] Further, the transmission ratio of the central gear and the first sun gear is the same as the transmission ratio of the central gear and the second planetary gear set, and the first planet carrier of the first planetary gear set and the second planet carrier of the second planetary gear set are of the same structure.

[0011] Further, the first planet carrier or the second planet carrier comprises a fixing sleeve, the fixing sleeve is mounted on the bottom wall of the cabinet body through a support frame, the central shaft of the first planet carrier or the second planet carrier is located on the central axis of the fixing sleeve, an annular support disc is fixedly arranged in the fixing sleeve, a ring of tooth tracks is formed on the circumferential inner wall of the annular support disc, and rotary discs are coaxially sleeved on the two sides of the annular support disc, a transmission sun gear on the central shaft of the first planet carrier or the second planet carrier is rotatably arranged in the rotary disc, a planet wheel is rotatably arranged on the rotary disc, the planet wheel is rotatably engaged on the transmission sun gear and the tooth tracks in the circumferential direction, and the first output shaft or the second output shaft is fixedly connected to the center of the rotary disc.

[0012] The utility model provides a novel wind driven generator cabinet adopts two -stage speed increasing design through the optimization of rotational speed and power distribution in stage by stage, in the same time of promoting wind energy utilization rate, expansion working condition adaptability, give consideration to compact structure and system reliability, is the key innovation of breaking through traditional single path transmission efficiency bottleneck. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 For the three -dimensional structure of the utility model Figure 1 .

[0014] Figure 2 For the three -dimensional structure of the utility model Figure 2 .

[0015] Figure 3 For Figure 2 The structure of the middle ring middle A is enlarged.

[0016] Figure 4 For the structure of the first planet carrier in embodiment two.

[0017] In the drawing: 1, cabinet body; 2, power input shaft; 5, first generator; 6, second generator; 7, wind turbine; 8, central gear; 9, bearing seat; 31, first sun gear; 32, first planet carrier; 33, first output shaft; 41, second sun gear; 42, second planet carrier; 43, second output shaft; 341, fixing sleeve; 342, support frame; 343, annular support disc; 344, tooth track; 345, rotary disc; 346, planet wheel; 347, transmission sun gear. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.

[0019] Embodiment one;

[0020] Figures 1-3 A novel wind turbine cabinet shown, including cabinet body 1, in the embodiment, power input shaft 2 in cabinet body 1 is rotationally arranged in cabinet body 1 through two groups of bearing seat 9, bearing seat 9 is fixed to the bottom wall of cabinet body 1, and is spacedly distributed along the axial direction of power input shaft 2, ensures the high-speed rotation stability of shaft, also reduces the mechanical loss caused by load fluctuation or vibration, improves the overall reliability of system, power input shaft 2 is the rotation hub of mechanical energy transmission, is directly connected with wind turbine 7, converts the wind energy captured by wind turbine into rotary mechanical energy, and is transmitted to the transmission system inside the cabinet through the output end thereof.

[0021] Cabinet body 1 is provided with first planetary gear set, second planetary gear set, first generator 5 and second generator 6; the output end of power input shaft 2 is coaxially connected with center gear 8, is engaged with the first sun gear 31 of first planetary gear set and the second sun gear 41 of second planetary gear set through center gear 8, thereby realizing the double-path distribution of energy, so that two sets of planetary gear sets can synchronously receive power input, drive first generator 5 and second generator 6 to work cooperatively.

[0022] First planet carrier 32 of first planetary gear set is engaged with the gear on the rotor of first generator 5 through the gear on first output shaft 33, and second planet carrier 42 of second planetary gear set is engaged with the gear on the rotor of second generator 6 through the gear on second output shaft 43. The transmission ratio of center gear 8 and first sun gear 31 is same to the transmission ratio of center gear 8 and second planetary gear set, and the transmission ratio consistency of center gear 8 and two planetary gear sets makes power input shaft 2 become the core driving element of symmetrical transmission system. This design simplifies the control logic, ensures the balanced output power of double generators, and simultaneously reduces the manufacturing and maintenance complexity.

[0023] The first planet carrier 32 of the first planetary gear set and the second planet carrier 42 of the second planetary gear set are structurally identical. The first planet carrier 32 or the second planet carrier 42 each comprises a fixed sleeve 341 mounted on the bottom wall of the cabinet body 1 through a support frame 342, providing stable mechanical support, ensuring the structural stability of the planetary gear set during high-speed operation, and reducing vibration and deviation; the central shaft of the first planet carrier 32 or the second planet carrier 42 is located on the central axis of the fixed sleeve 341, and an annular support disc 343 is fixedly arranged in the fixed sleeve 341, a ring of tooth tracks 344 is formed on the circumferential inner wall of the annular support disc 343, and a rotating disc 345 is coaxially sleeved on both sides of the annular support disc 343, a transmission sun gear 347 on the central shaft of the first planet carrier 32 or the second planet carrier 42 is rotationally arranged in the rotating disc 345, a planet gear 346 is rotationally arranged on the rotating disc 345, the planet gear 346 is rotationally engaged with the transmission sun gear 347 and the tooth tracks 344 in the circumferential direction, and the first output shaft 33 or the second output shaft 43 is fixedly connected to the center of the rotating disc 345. As the core component of the planetary gear set, the planet carrier converts the mechanical energy input by the central gear and the sun gear into rotational power of the output shaft through the meshing of the planet gear and the tooth track, and finally drives the generator to generate electricity. The planet carrier distributes the input power to the output shaft according to a fixed transmission ratio, adjusts the rotational speed and torque, and adapts to the rated operating parameters of the generator. The specific working process is that the power input shaft 2 drives the central gear 8 to rotate, the central gear 8 is engaged with the first sun gear 31 and the second sun gear 41, the first sun gear 31 coaxially drives the transmission sun gear 347 of the first planetary gear set, the transmission sun gear 347 is engaged with the planet gear 346, and at the same time, the planet gear 346 is engaged with the tooth tracks 344 fixed on the annular support disc 343. The planet gear 346 is forced to rotate around the transmission sun gear 347 while revolving around the transmission sun gear 347, thereby driving the rotating disc 345 to rotate and driving the first output shaft 33 to transmit to the generator rotor. The second planet carrier has the same structure, the first planet carrier and the second planet carrier have the same structure and transmission ratio, and the input power of the double generators is evenly distributed. If one gear set fails, the other set can still work independently.

[0024] In this embodiment, the central gear has a large number of teeth, which is designed as a low-speed input source with the lowest rotational speed, the first sun gear has a small number of teeth, which is designed to achieve the first-stage speed-up when engaged with the central gear, and the tooth tracks have a larger number of teeth than the first sun gear, which forces the planet gear to rotate, and the first output shaft or the second output shaft is provided with a small-tooth gear, which is engaged with the generator gear to achieve the second-stage speed-up.

[0025] In summary, in the embodiment, the wind turbine captures wind energy and drives the power input shaft to rotate, the sun gear rotates synchronously with the input shaft, and is engaged with the first sun gear and the second sun gear of the first planetary gear set and the second planetary gear set respectively, simultaneously driving the planetary gears to revolve around the transmission sun gear, and the planetary gears are engaged with the fixed gearway to force the rotation, finally driving the rotating disc and the output shaft to rotate, and transmitting power to the generator. Through the speed reduction and torque increase effect of the planetary gear set, the wide range of rotational speed of the input shaft is converted into efficient input speed of the generator, and double-path power balanced distribution is realized.

[0026] The embodiment adopts two-stage speed increase to realize wide-range wind speed adaptability, the input speed under low wind speed is increased through the first-stage speed increase (sun gear→sun gear), to ensure that the generator can still effectively cut in under weak wind condition; the second-stage speed increase (planet carrier→output shaft→generator) further optimizes the speed matching under high wind speed, avoids relying on the brake device to limit the speed, reduces energy waste, and realizes efficient power generation in the whole wind speed range. Two sets of symmetrical planetary gear sets are independently used, and the power generation can still be maintained when a single path fails, improving the system reliability; the two sets of planetary gear sets adopt the same transmission ratio and structure, simplifying the control logic and reducing the manufacturing and maintenance costs.

[0027] Embodiment two;

[0028] Figure 4 As shown, different from embodiment one, three planetary gears 346 are symmetrically distributed around the center of the transmission sun gear 347, and the included angle between adjacent planetary gears is 120°, to ensure load balance and minimize vibration. The rotating disc 345 is uniformly provided with three mounting holes in the circumferential direction, and bearings are configured to fix the planetary gear shaft, to ensure that the engagement clearance of the planetary gears, the transmission sun gear and the gearway is consistent, and the scheme is particularly suitable for high-power wind power generation scene, load is dispersed by increasing the number of planetary gears, the gear life is prolonged, and the compactness of the structure is maintained.

[0029] The above embodiments are not a limitation of the present application, and the present application is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the technical scheme of the present application also belong to the protection scope of the present application.

Claims

1. A new type of wind power generator cabinet, characterized in that, The cabinet body (1), the power input shaft (2) rotatably arranged in the cabinet body (1), the first planetary gear set, the second planetary gear set, the first generator (5) and the second generator (6) are included. The input end of the power input shaft (2) is connected with the wind turbine (7), and the output end of the power input shaft (2) coaxially connected with the center gear (8) is respectively engaged with the first sun gear (31) on the center shaft of the first planetary gear set and the second sun gear (41) on the center shaft of the second planetary gear set. The first carrier (32) of the first planetary gear set is engaged with the gear on the rotor of the first generator (5) through the gear on the first output shaft (33), and the second carrier (42) of the second planetary gear set is engaged with the gear on the rotor of the second generator (6) through the gear on the second output shaft (43).

2. The novel wind driven generator cabinet as claimed in claim 1, wherein: The power input shaft (2) is rotatably arranged in the cabinet body (1) through at least two groups of bearing seats (9), the bearing seats (9) are fixed to the bottom wall of the cabinet body (1), and are spaced apart along the axial direction of the power input shaft (2).

3. The novel wind power generator cabinet according to claim 1 or 2, characterized in that: The transmission ratio of the center gear (8) and the first sun gear (31) is the same as the transmission ratio of the center gear (8) and the second planetary gear set, and the first carrier (32) of the first planetary gear set and the second carrier (42) of the second planetary gear set are the same in structure.

4. The novel wind driven generator cabinet as claimed in claim 3, wherein: The first carrier (32) or the second carrier (42) comprises a fixed sleeve (341), the fixed sleeve (341) is mounted on the bottom wall of the cabinet body (1) through a support frame (342), the center shaft of the first carrier (32) or the second carrier (42) is located on the central axis of the fixed sleeve (341), an annular support disc (343) is fixedly arranged in the fixed sleeve (341), a ring of tooth tracks (344) is formed on the circumferential inner wall of the annular support disc (343), rotary discs (345) are coaxially sleeved on the two sides of the annular support disc (343), transmission sun gears (347) on the center shaft of the first carrier (32) or the second carrier (42) are rotatably arranged in the rotary discs (345), planetary gears (346) are rotatably arranged on the rotary discs (345), the planetary gears (346) are rotatably engaged on the transmission sun gears (347) and the tooth tracks (344) along the circumferential direction, and the first output shaft (33) or the second output shaft (43) is fixedly connected to the center of the rotary disc (345).

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