CN201113718Y - Linear permanent magnet generator for wind power generation - Google Patents

Abstract

The utility model aims to provide a linear dynamo magneto with a simple structure for wind power generation, comprising a stator and a rotor. The utility model is characterized in that the rotor is fixed on a chain, wherein the chain is installed on sprockets; and the stator is fixed at one side of the chain. The rotor comprises a plurality of permanent magnets fixed on the chain, and the stator comprises a plurality of coils wound on iron cores. The utility model solves the problems of common generators of huge size, high rotating speed and small number of poles, and has the characteristics of multi-pole, low speed and high power, thereby especially applicable to wind power generators. Besides, no intermediate accelerator is necessary between wind wheels and the generator, and the dynamo magneto can be installed in the tower drum of a fan, thereby being convenient for production, installation and transportation.

Description

Linear permanent magnet generator for wind power generation

technical field

The utility model relates to a non-generator, in particular to a linear permanent magnet generator for wind power generation used in a wind power generation device.

Background technique

Wind generators use wind energy to drive the wind wheel to rotate, thereby driving the generator to run. In order to facilitate the overall installation, the generator is usually installed in the cabin at the top of the wind turbine tower. The advantage of this structure is that the wind wheel can directly drive the generator rotor to rotate, or drive the generator to rotate through the speed increaser, avoiding the mechanical loss caused by the intermediate transmission link. However, traditional generators are all cylindrical structures that rotate in a circle. This kind of generator is bulky and installed on the top of the wind turbine tower, causing the center of gravity to be unstable. In addition, for wind turbines, especially high-power wind turbines, the speed of the wind rotor is usually low, while the generator with a cylindrical structure is usually only a four-pole generator due to the volume limit, which requires the rotor to have a high speed. Power generation, so when the generator is used for high-power wind power generation, a speed increasing device is usually installed between the wind wheel and the generator. The setting of the speed increasing device causes the mechanical transmission efficiency to be low, the structure is complicated and easy to be damaged.

Contents of the invention

The purpose of this utility model is to provide a linear permanent magnet generator for wind power generation with a simple structure, which has the characteristics of multi-pole, low speed and high power, and is especially suitable for high-power wind power generators without the need for an intermediate speed-up device.

In order to achieve the above object, the utility model adopts the following technical solutions:

The linear permanent magnet generator for wind power generation described in the utility model includes a rotor and a stator, and is characterized in that: the rotor is fixedly installed on the chain, the chain is installed on the sprocket wheel, the stator is fixedly installed on one side of the chain, and the rotor For fixing a plurality of permanent magnets installed on the chain, the stator is made of an iron core and a coil, with wire grooves on the iron core, and the coils are installed in the wire grooves, and the shape of the iron core 21 is a strip parallel to the chain 3 .

The sprocket is a coaxial double wheel, two parallel chains are installed on the sprocket, the shape of the iron core of the stator is the same ring shape as the chain, and it is fixedly installed between the two chains; the rotor 1 includes a rotor bracket and a fixed The permanent magnet installed on the rotor bracket, the two ends of the rotor bracket are respectively fixedly installed on two chains, the installation position of the permanent magnet is located between the two chains; there are slide rails on the outside of the two chains, and the two top ends of the rotor bracket are installed in the rails.

The utility model solves the defects of bulky permanent magnet direct-drive generators and difficulties in manufacture, transportation and installation, and has the characteristics of multi-pole, low speed and high power, and is especially suitable for high-power wind power generators. There is no need to set an intermediate speed-up device between the machines. At the same time, it can be installed inside the tower of the wind power generator to lower the center of gravity of the machine room, and it is driven by a chain, which is safe and reliable, and is convenient for manufacture, installation and transportation.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is the top view of an embodiment of the utility model;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is a cross-sectional view of another embodiment of the present invention.

Detailed ways

As shown in FIG. 1 , the linear permanent magnet generator for wind power generation according to the utility model includes a rotor 1 and a stator. The rotor 1 is fixedly installed on the chain 3, the chain 3 is installed on the sprockets 4, 5, and the stator is fixedly installed on one side of the chain 3. The rotor 1 is a plurality of permanent magnets fixedly installed on the chain 3. For the convenience of clear display, only three rotors are drawn in the accompanying drawings. The actual situation is that the chain 3 is equidistantly covered with rotors. The stator consists of an iron core 21 and a coil. The iron core 21 has a wire groove 22, and the coil is installed in the wire groove 22. The shape of the iron core 21 is a strip parallel to the chain 3. Of course, the iron core 21 can also be designed into other shapes, such as the same ring shape as the chain 3 , or a ring shape slightly smaller than the chain 3 . What is necessary is just to be able to make the main part of the iron core 21 to which a coil is attached, and the linear part of the chain 3 parallel.

As shown in Figures 2 and 3, the sprockets 4 and 5 are coaxial double wheels, that is, two groups of sprockets are fixed on the same rotating shaft, and two parallel chains 3 are installed on the sprockets 4 and 5, and the stator The shape of the iron core 21 is the same ring shape as the chain 3, or this is two parallel strips, parallel to the straight part of the chain 3, and the stator is fixedly installed between the two chains 3; the rotor 1 includes a rotor bracket 11 and The permanent magnet 12 fixedly installed on the rotor bracket 11, the cross section of the rotor bracket 11 is Π-shaped, the two ends of the rotor bracket 11 are respectively fixedly installed on two chains 3, the permanent magnet 12 is installed under the rotor bracket 11, so that It is located between the two chains 3 and close to the stator; a slide rail 7 is provided on the outside of the two chains 3 , and the two top ends of the rotor bracket 11 are installed in the slide rail 7 . In order to reduce friction, a bearing or a pulley can also be installed between the top of the rotor bracket 11 and the slide rail 7 .

Certainly, above-mentioned mechanism is all installed in a casing, slide rail 7 is fixed in the casing, and the rotating shaft of sprocket wheel 4,5 is installed on the casing by bearing.

The distance between the two sprockets 4,5 can be freely set as required.

When in use, connect the rotating shaft of one of the sprockets to the rotating shaft of the wind wheel. When the wind wheel rotates, it drives the sprockets 4 and 5 to rotate. When the chain 3 moves with the rotor 1, it sweeps the windings on the stator to generate cutting magnetic lines of force. , emits a current. The function of the slide rail 7 is to ensure that the gap between the permanent magnet 12 and the stator will not change due to the elasticity of the chain 3 .

The appearance mechanism of the linear permanent magnet generator for wind power generation is elongated, and can be installed in the wind turbine tower as required, so that the center of gravity of the whole machine is lowered, and the structure is more reasonable. In addition, due to the use of chain transmission. Therefore, the number of rotors 1 and the length of the stator can be freely set according to needs, which is convenient for designing a multi-pole, low-speed, high-power wind generator. Widely used in high-power permanent magnet direct drive generator sets.

Of course, according to the above technical tips, those of ordinary skill should be able to realize another embodiment of the present utility model. That is, under the situation that sprocket wheels 4 and 5 are all single sprockets, there is only one chain 3 on sprocket wheels 4 and 5. At this time, the stator can be installed in the ring-shaped area surrounded by the chain 3 as shown in Figure 1, or it can be installed on one side of the chain 3, as long as the installation position of the permanent magnet 12 is changed accordingly, so that it is close to the stator and can be placed on the chain. 3 under the drive to sweep across the surface of the stator.

As shown in FIG. 4 , as a further improvement to the present invention, stators can also be provided on both sides of each chain, and permanent magnets 12 can be installed on the corresponding rotors 1 . In this way, it is equivalent to using several sets of generators in parallel, with higher efficiency and smaller volume.

Claims (2)

1. A linear permanent magnet generator for wind power generation, including a rotor (1) and a stator, characterized in that: the rotor (1) is fixedly installed on the chain (3), and the chain (3) is installed on the sprockets (4, 5) , the stator is fixedly installed on one side of the chain (3), the rotor (1) is a plurality of permanent magnets fixedly installed on the chain (3), the stator is composed of an iron core (21) and a coil, and the iron core (21 ) with wire groove (22), the coil is installed in the wire groove (22), and the shape of the iron core (21) is a strip parallel to the chain (3). 2. The linear permanent magnet generator for wind power generation according to claim 1 or 2, characterized in that: the sprockets (4, 5) are coaxial double wheels, and two sprockets (4, 5) are installed A parallel chain (3), the shape of the iron core (21) of the stator is the same ring shape as the chain (3), and is fixedly installed between the two chains (3); the rotor (1) includes a rotor bracket (11) and The permanent magnet (12) fixedly installed on the rotor bracket (11), the two ends of the rotor bracket (11) are respectively fixedly installed on the two chains (3), the installation position of the permanent magnet (12) is located in the two chains (3) between; the outer sides of the two chains (3) are provided with slide rails (7), and the two top ends of the rotor bracket (11) are installed in the slide rails (7).

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