Semi-direct-drive permanent magnet wind driven generator with highly integrated planetary speed increasing and generator

Abstract

The utility model discloses a semi-direct-drive permanent magnet wind driven generator highly integrated with a planetary speed increasing mechanism and a generator, which comprises an impeller system, a primary planetary speed increasing mechanism, a central gear shaft, a partition baffle, a generator inner rotor, a generator outer rotor, a main shaft and a generator rear end cover, the first-stage planet speed increasing mechanism comprises a first-stage planet fixing frame, a first-stage planet wheel and a large gear ring, the large gear ring is fixed to a hub of the impeller system, the first-stage planet wheel is fixed to the first-stage planet fixing frame through a bearing, the first-stage planet fixing frame is fixed to the main shaft through a key, and a generator inner rotor is fixed to a center gear shaft; the sun gear shaft is installed on the main shaft through a bearing, the first-stage planet wheel is meshed with the large gear ring and the sun gear shaft, the partition baffle is fixed to the hub, the generator outer rotor is fixed to the hub, and the generator rear end cover is connected with the generator outer rotor and installed on the main shaft through a bearing. According to the utility model, the generated power of the generator can be effectively improved, and the material cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet wind power generating sets, in particular to a semi-direct drive permanent magnet wind generator with highly integrated planetary speed increase and generator. Background Art

[0002] At present, permanent magnet wind power generating sets generally use outer rotor type or inner rotor type direct drive permanent magnet generators for power generation. There is usually no gear speed increasing mechanism between the hub and the generator. If the power generation power needs to be increased, it is necessary to increase the diameter of the excitation rotor or the size of the permanent magnet of the generator. Since the cost of neodymium iron boron for manufacturing permanent magnets is relatively high, the cost of the generator is increased. In order to control the cost of the generator, on the basis of learning from the mature transmission technical route of MW-class semi-direct drive wind turbines, through technological innovation, a semi-direct drive permanent magnet wind generator with highly integrated planetary speed increase and generator is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problem that the direct drive permanent magnet wind generator has the problem that increasing the power requires increasing the diameter or size of the outer rotor excitation, resulting in an increase in the cost of permanent magnets. A semi-direct drive permanent magnet wind generator with highly integrated planetary speed increase and generator is provided. By the relative rotation of the inner and outer rotors of the generator and a first-stage planetary speed increasing mechanism, the excitation speed of the inner and outer rotors of the generator is increased, the power generation power of the generator can be effectively increased, and the material cost can be reduced.

[0004] To achieve the above purpose, the technical solution provided by the utility model is: a semi-direct drive permanent magnet wind generator with highly integrated planetary speed increase and generator, including an impeller system, a first-stage planetary speed increasing mechanism, a central gear shaft, a partition baffle, a generator inner rotor, a generator outer rotor, a main shaft and a generator rear end cover. Among them, the first-stage planetary speed increasing mechanism includes a first-stage planetary fixed frame, first-stage planetary gears and a large gear ring. The large gear ring is fixed on the hub of the impeller system. The first-stage planetary gears are fixed on the first-stage planetary fixed frame through bearings. The first-stage planetary fixed frame is fixed to the main shaft through a key. The generator inner rotor is fixed on the central gear shaft. The central gear shaft is installed on the main shaft through a bearing. The first-stage planetary gears are located between the large gear ring and the central gear shaft and are respectively meshed with the large gear ring and the central gear shaft. The partition baffle is fixed on the hub of the impeller system and is located between the first-stage planetary gears and the generator inner rotor. The generator outer rotor is fixed on the hub of the impeller system. The generator rear end cover is connected to the generator outer rotor and is installed on the main shaft through a bearing.

[0005] Preferably, the large gear ring is fixed on the hub of the impeller system by bolts.

[0006] Preferably, the generator inner rotor is fixed on the central gear shaft by bolts.

[0007] Preferably, the partition baffle is fixed to the hub of the impeller system by bolts.

[0008] Preferably, the outer rotor of the generator is fixed to the hub of the impeller system by bolts.

[0009] Preferably, the rear end cover of the generator is connected to the outer rotor of the generator by bolts.

[0010] Preferably, it further includes an N-stage planetary speed increasing mechanism, where N is an even number. Each stage structure of the N-stage planetary speed increasing mechanism is the same as that of the first-stage planetary speed increasing mechanism, and it is located on the inner rotor side of the generator.

[0011] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0012] 1. By the relative rotation of the inner and outer rotors of the generator and the first-stage planetary speed increasing mechanism, the present utility model improves the excitation speed of the inner and outer rotors of the generator, realizes the function of increasing the power of the generator without increasing or with little increase in the amount of magnetic steel, and can reduce the material cost of the generator with the same power generation.

[0013] 2. Adopting the first-stage planetary drive has low cost; of course, an N-stage planetary speed increasing mechanism, where N is an even number, can also be added on the inner rotor side of the generator according to needs, and then the relative excitation speed of the inner and outer rotors of the generator is increased through the (N + 1)-stage planetary speed increasing mechanism, thereby greatly increasing the power generation of the generator.

[0014] 3. The adopted planet carrier is a fixed part, and the fatigue strength is reduced.

[0015] 4. The hub is directly connected to the large gear ring, without transmission loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a semi-direct drive permanent magnet wind generator with highly integrated planetary speed increasing and generator.

[0017] Figure 2 It is a schematic force transmission diagram of a semi-direct drive permanent magnet wind generator with highly integrated planetary speed increasing and generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0020] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0021] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having", etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof. At the same time, the terms used in this specification include any and all combinations of the related listed items.

[0022] Embodiment 1

[0023] As Figure 1 shown, this embodiment discloses a semi-direct-drive permanent magnet wind turbine with highly integrated planetary speed increase and generator, including an impeller system 1, a first-stage planetary speed increase mechanism, a central gear shaft 5, a partition baffle 6, a generator inner rotor 7, a generator outer rotor 8, a main shaft 9 and a generator rear end cover 10. Among them, the first-stage planetary speed increase mechanism includes a first-stage planetary carrier 2, first-stage planet gears 3 and a large gear ring 4. The large gear ring 4 is fixed to the hub 101 of the impeller system 1 by bolts. The first-stage planet gears 3 are fixed to the first-stage planetary carrier 2 by bearings. The first-stage planetary carrier 2 is fixed to the main shaft 9 by a key. The generator inner rotor 7 is fixed to the central gear shaft 5 by bolts. The central gear shaft 5 is installed on the main shaft 9 by bearings. The first-stage planet gears 3 are located between the large gear ring 4 and the central gear shaft 5 and mesh with the large gear ring 4 and the central gear shaft 5 respectively. The partition baffle 6 is fixed to the hub 101 of the impeller system 1 by bolts and is located between the first-stage planet gears 3 and the generator inner rotor 7. The generator outer rotor 8 is fixed to the hub 101 of the impeller system 1 by bolts. The generator rear end cover 10 is connected to the generator outer rotor 8 by bolts and is installed on the main shaft 9 by bearings.

[0024] The working principle of the above-mentioned semi-direct drive permanent magnet wind turbine generator is as follows: the rotational power is transmitted to the generator inner rotor 7 through a first-stage planetary speed increasing mechanism, so that the generator inner and outer rotors 7 and the generator outer rotor 8 rotate relative to each other, thereby increasing the generator speed and the magnetic field cutting speed of the coil fixed inside the generator outer rotor 8 by the magnetic steel fixed outside the generator inner and outer rotor 7. The increase in speed brings about an increase in the generator output power, such as Figure 2 The specific path is as follows:

[0025] After absorbing wind energy, the impeller system 1 transmits the torque generated by the wind energy to the first-stage planetary gear 3 through the large gear ring 4. The first-stage planetary gear 3 transmits the torque to the central gear shaft 5. The central gear shaft 5 drives the inner rotor 7 of the generator to rotate. At the same time, the impeller system 1 also drives the outer rotor 8 of the generator to rotate in the opposite direction. In this way, the inner rotor 7 of the generator and the outer rotor 8 of the generator produce rotational motion in opposite directions. The magnetic lines of force of the magnetic steel of the inner rotor 7 of the generator cut the coil of the outer rotor 8 of the generator, so that the coil generates an induced electromotive force and outputs electrical energy to the outside, thereby achieving the purpose of power generation.

[0026] Specifically, the main body of the impeller system 1 is cast and processed by ductile iron, the large gear ring 4 is forged by alloy steel, and the first-stage planetary fixed frame 2 is cast and processed by ductile iron; the central gear shaft 5 is processed by alloy steel material, and the tooth surface is treated; the first-stage planetary gear 3 is processed by medium carbon steel or alloy steel, and the tooth surface is treated; the inner rotor 7 of the generator is welded by steel plates, the partition baffle 6 is welded by steel plates or aluminum plates, the outer rotor 8 of the generator is cast by carbon steel or cast iron, the main shaft 9 is processed by medium carbon alloy steel material, and the rear end cover 10 of the generator is welded by steel plates or cast by cast iron.

[0027] Of course, the above materials are not limited to the specified materials, and other suitable materials can be selected based on strength calculations.

[0028] Example 2

[0029] What is different from Example 1 is that this embodiment adds a two-stage planetary speed increasing mechanism (not shown in the figure) on the side of the inner rotor 7 of the generator, and further increases the relative excitation speed of the inner and outer rotors 7 and 8 of the generator through the three-stage planetary speed increasing mechanism, thereby increasing the power generation of the generator; each added level of structure is the same as the first-stage planetary speed increasing mechanism.

[0030] Example 3

[0031] What is different from Example 1 is that this embodiment adds an N-stage planetary speed increasing mechanism (not shown in the figure) on the side of the inner rotor 7 of the generator, N is an even number of stages, and then uses an (N+1)-stage planetary speed increasing mechanism to further increase the relative excitation speed of the inner and outer rotors 7 and 8 of the generator, thereby increasing the power generation of the generator; wherein each added stage structure is the same as the first-stage planetary speed increasing mechanism.

[0032] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claimed rights.

Claims

1. A semi-direct drive permanent magnet wind turbine with a highly integrated planetary speed increaser and generator, characterized in that: The invention comprises an impeller system (1), a first-stage planetary speed increasing mechanism, a central gear shaft (5), a partition baffle (6), a generator inner rotor (7), a generator outer rotor (8), a main shaft (9) and a generator rear end cover (10), wherein the first-stage planetary speed increasing mechanism comprises a first-stage planetary fixing frame (2), a first-stage planetary wheel (3) and a large gear ring (4), wherein the large gear ring (4) is fixed on a wheel hub (101) of the impeller system (1), the first-stage planetary wheel (3) is fixed on the first-stage planetary fixing frame (2) through a bearing, the first-stage planetary fixing frame (2) and the main shaft (9) are fixed through a key, and the generator inner rotor (7) is fixed on The central gear shaft (5) is mounted on a main shaft (9) via a bearing; the first-stage planetary gear (3) is located between the large gear ring (4) and the central gear shaft (5) and is meshed with the large gear ring (4) and the central gear shaft (5) respectively; the partition baffle (6) is fixed on the hub (101) of the impeller system (1) and is located between the first-stage planetary gear (3) and the generator inner rotor (7); the generator outer rotor (8) is fixed on the hub (101) of the impeller system (1); the generator rear end cover (10) is connected to the generator outer rotor (8) and is mounted on the main shaft (9) via a bearing.

2. A semi-direct drive permanent magnet wind turbine with highly integrated planetary speed increaser and generator according to claim 1, characterized in that: The large gear ring (4) is fixed to the hub (101) of the impeller system (1) by means of bolts.

3. A semi-direct drive permanent magnet wind turbine with highly integrated planetary speed increaser and generator according to claim 1, characterized in that: The generator inner rotor (7) is fixed on the central gear shaft (5) by means of bolts.

4. A semi-direct drive permanent magnet wind turbine with highly integrated planetary speed increaser and generator according to claim 1, characterized in that: The partition baffle (6) is fixed to the hub (101) of the impeller system (1) by means of bolts.

5. The semi-direct drive permanent magnet wind turbine generator with highly integrated planetary speed increaser and generator according to claim 1, characterized in that: The generator outer rotor (8) is fixed to the hub (101) of the impeller system (1) by means of bolts.

6. A semi-direct drive permanent magnet wind turbine with highly integrated planetary speed increaser and generator according to claim 1, characterized in that: The generator rear end cover (10) is connected to the generator outer rotor (8) via bolts.

7. A semi-direct drive permanent magnet wind turbine generator with highly integrated planetary speed increaser and generator according to claim 1, characterized in that: It also includes an N-stage planetary speed increasing mechanism, N being an even number, and each stage structure of the N-stage planetary speed increasing mechanism is the same as the first-stage planetary speed increasing mechanism, which is located on the inner rotor (7) side of the generator.

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