CN220067016U

CN220067016U - Electromagnetic structure of generator

Info

Publication number: CN220067016U
Application number: CN202321713107.1U
Authority: CN
Inventors: 杨均
Original assignee: Chongqing Zhiren Electric Equipment Co ltd
Current assignee: Chongqing Zhiren Electric Equipment Co ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-11-21
Anticipated expiration: 2033-06-30

Abstract

The utility model relates to the technical field of generators and discloses an electromagnetic structure of a generator, which comprises a stator structure and a rotor structure, wherein the rotor structure is arranged inside the stator structure, the rotor structure comprises a rotating shaft and a rotor iron core, and the rotor iron core is arranged on the rotating shaft; the rotating shaft is of a straight shaft structure, an inwards concave stepped groove is formed in the end part of one end of the rotating shaft, a transmission shaft is arranged in the rotating shaft, and one end of the transmission shaft penetrates through the rotating shaft and is fixed in the stepped groove; the other end of the rotating shaft is provided with a double-flange connecting disc, and the other end of the transmission shaft penetrates through the rotating shaft and is arranged in the double-flange connecting disc; 6 groups of magnets are arranged on the rotor core, and the circumferences of the 6 groups of magnets are uniformly distributed on the periphery of the rotor core; each group of magnets is connected in series, and each group of magnets comprises two permanent magnet blocks which are arranged in parallel. The utility model changes conical transmission into straight column transmission, has higher transmission reliability and efficiency, changes the electromagnetic field structure, improves the magnetic energy product, and makes the magnetic field stronger, thereby realizing the requirement of high power output of the small-volume generator.

Description

Electromagnetic structure of generator

Technical Field

The utility model relates to the technical field of generators, in particular to an electromagnetic structure of a generator.

Background

Along with the increasing market demand, the output power demand of the medium-sized and small-sized generators is also continuously increased, and the core for determining the output power of the generators is a stator and rotor structure, and the motor drives the rotor to rotate so as to enable the rotor to rotate relative to the stator, thereby enabling a winding cutting magnetic field to generate electric potential and providing power output. The magnitude of the output power is determined by the magnetic flux generated by the cutting magnetic field, and the magnetic flux depends on the magnitude of the generated magnetic field and the size of the armature coil.

In the prior art, because the volume of the small and medium-sized generators is limited, the structures of the stator and the rotor are limited during design, so that the large current cannot be generated like the large-sized generators, and the output requirement of the large current is difficult to be met by the small and medium-sized generators. However, because of the requirements of application scenes, a generator with small volume, light weight and high output power is required, and therefore, an electromagnetic structure capable of being applied to a small and medium-sized generator to realize high current output is required to be designed.

Disclosure of Invention

The utility model aims to provide an electromagnetic structure of a generator, so as to solve the problem that the existing electromagnetic structure cannot meet the requirement of a medium-sized and small-sized generator for realizing large current output.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model is mainly used for realizing the direct current output of rated voltage 12-40V and rated current 200-500A of the small-volume generator. The electromagnetic structure of the generator comprises a stator structure and a rotor structure, wherein the rotor structure is arranged in the stator structure, the rotor structure comprises a rotating shaft and a rotor iron core, and the rotor iron core is arranged on the rotating shaft; the rotating shaft is of a straight shaft structure, an inwards concave stepped groove is formed in the end part of one end of the rotating shaft, a transmission shaft is arranged in the rotating shaft, and one end of the transmission shaft penetrates through the rotating shaft and is fixed in the stepped groove; the other end of the rotating shaft is provided with a double-flange connecting disc, and the other end of the transmission shaft penetrates through the rotating shaft and is arranged in the double-flange connecting disc; 6 groups of magnets are arranged on the rotor core, and the circumferences of the 6 groups of magnets are uniformly distributed on the periphery of the rotor core; each group of magnets is connected in series, and each group of magnets comprises two permanent magnet blocks which are arranged in parallel.

The principle and the advantages of the scheme are as follows:

the potential is required to be increased to realize the high-current output, and the way of increasing the potential depends on the size of an armature coil, and the size of the generator is increased due to the increase of the armature coil, so that a certain difficulty exists in realizing the high-current output of the generator with small size, and how to increase the power output of the generator without increasing the volume and the weight of the generator becomes a problem.

The utility model improves the magnetic field without changing the volume and weight of the small-volume generator, thereby avoiding the trouble of the armature coil, achieving the effect of increasing the potential, overcoming the conventional technical bias of adjusting the armature coil, adopting 6 groups of magnets, and adopting a mode of firstly connecting the magnets in parallel and then connecting the magnets in series to increase the strength of the magnets, improving the magnetic receiving surface of the rotor, simultaneously adopting a permanent magnet with stronger magnetism, having higher efficiency, further improving the strength of the magnetic field and improving the potential output from the angle of the magnetic field. And the conical transmission between the engine and the prior art is changed into the straight column transmission by matching the straight shaft-shaped rotating shaft with the transmission shaft, so that the transmission efficiency is higher, the transmission loss is less, and meanwhile, the structure is more beneficial to processing and reduces the production difficulty.

And the problem that the armature coil is difficult to achieve high current is solved under the condition of small volume, the production process difficulty is reduced, and meanwhile, the requirement of high current output is met, so that the prejudice that the high current output can be achieved only through a large-sized generator is overcome, the high current output of the small-volume generator reaching about 300A is achieved, and the output power of the small-volume generator is improved.

Further, the magnets of each group are bonded in series; the two permanent magnets are connected in parallel at a circumferential angle of 30 degrees. The distribution requirement of the magnet is met, and the overall magnetic field intensity is improved.

Further, the permanent magnet block is of a fan-shaped structure, the length L of the permanent magnet block is 60+0.5mm, the thickness H of the permanent magnet block in the magnetization direction is 16-0.1mm, and the polar arc degree a is 60 degrees. The permanent magnet is adopted to improve magnetic efficiency, and meanwhile, the requirement of adjustable magnetic force can be met.

Further, a fixed disc is arranged at the tail end of the transmission shaft; the fixed disk is of a disk structure and forms a T-shaped structure with the transmission shaft, and the fixed disk is arranged in the stepped groove. The connection stability of the transmission shaft is improved, and meanwhile, the transmission stability is ensured.

Further, square key grooves are formed in the double-flange connecting disc; the connecting end of the engine is connected with the double-flange connecting disc through a square key slot and is connected with the transmission shaft. Adopt square keyway to connect, the installation is more simple and convenient, reduces the installation and links up the degree of difficulty, guarantees simultaneously and connects steadily, and the transmission is steady, guarantees transmission efficiency.

Further, the rotating shaft and the rotor core are integrally formed. The connection stability is improved.

Further, the double-flange connecting disc comprises an axle center, the axle center is a hollow shaft, and the other end of the transmission shaft is arranged in the hollow shaft; the axle center is provided with a first connecting disc and a second connecting disc at intervals. The rotor core is provided with a circular groove, and the second connecting disc is connected with the rotor core through the groove. The double-flange structure is adopted to directly connect the connecting disc with the rotor core, so that the transmission efficiency is improved by directly connecting and transmitting the connecting disc with the rotor core through the flange, the flange connecting disc and the transmission shaft form internal and external bidirectional transmission, and the transmission loss is reduced while the stability is improved.

Further, the square key groove is arranged on the inner wall of the axle center.

Further, a fan blade structure is further arranged on one side of the first connecting disc. The internal temperature of the rotor is reduced through the fan blade structure.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic structural view of a rotor structure according to an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view of a rotor structure according to an embodiment of the utility model.

Fig. 4 is a schematic structural view of a rotor core according to an embodiment of the present utility model.

Fig. 5 is a right side view of a rotor structure according to an embodiment of the present utility model.

Fig. 6 is a schematic diagram of a magnet distribution structure according to an embodiment of the present utility model.

Fig. 7 is a schematic diagram of a connection mode of a magnet assembly according to an embodiment of the present utility model.

Fig. 8 is a schematic structural diagram of a permanent magnet block a according to an embodiment of the present utility model.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the rotor structure comprises a shell 1, a rotor structure 2, a stator structure 3, a rotating shaft 21, a double-flange connecting disc 22, a rotor core 23, a bearing 24, a magnet 25, a fan blade structure 26, a transmission shaft 27, a transmission shaft 4, square key grooves 201, step grooves 202, permanent magnets 203, through holes 213, a fixed disc 204, an axle center 205, a first connecting disc 211 and a second connecting disc 212.

An example is substantially as shown in figure 1: an electromagnetic structure of a generator comprises a shell 1, a stator structure 3 and a rotor structure 2 which are arranged in the shell 1. The rotor structure 2 is embedded inside the stator structure 3 and is connected inside the housing 1 by means of bearings 24. In particular, as shown in fig. 2, the rotor structure 2 includes a rotating shaft 21, a bearing 24 is installed at one end of the rotating shaft 21, and the rotor structure 2 is connected with the housing through the bearing 24, so as to reduce the vibration influence of the rotor structure 2. A rotor core 23 is integrally formed at the other end of the rotary shaft 21, and a magnet 25 is provided on the rotor core 23. The front end of the rotor core 23 is connected with a double-flange connecting disc 22 through bolts, and the double-flange connecting disc 22 is also connected with a fan blade structure 26 through bolts.

Specifically, referring to the cross-sectional view of the rotor structure 2 shown in fig. 3, the rotating shaft 21 is of a cylindrical structure, a rotor core 23 having a cylindrical structure is integrally formed at one end of the rotating shaft, an inward concave stepped groove 202 is formed at the end of the other end of the rotating shaft 21, and a connecting groove is formed at the outer side of the end of the rotating shaft 21 where the stepped groove 202 is located, and a bearing 24 is sleeved on the connecting groove. A drive shaft 27 is mounted in the rotary shaft 21, and the drive shaft 27 is provided to penetrate the rotary shaft 21 and the rotor core 23. Specifically, a fixed disc 204 with a disc structure is integrally formed at one end of the transmission shaft 27, so that the fixed disc 204 and the transmission shaft 27 form a T-shaped structure, and the fixed disc 204 is fixedly arranged in the stepped groove 202, thereby realizing flat key transmission between the transmission shaft 27 and the rotation shaft 21 and reducing transmission loss.

Specifically, a circular groove is formed in the other end of the rotor core 23, and the double-flange connection disc 22 is fixedly mounted in the groove by bolts. In this embodiment, the dual flange connection disc 22 includes a hollow shaft center 205, and a first connection disc 211 and a second connection disc 212 are disposed at intervals around the shaft center 205. Wherein, the first connection plate 211 is arranged at the middle front part of the axle center 205, and the second connection plate 212 is arranged at the tail end of the axle center 205. The second connection pad 212 is inserted into the groove of the rotor core 23 by bolts, so that the double flange connection pad 22 is fixedly connected with the rotor core 23. A fan blade structure 26 is mounted on the outer side of the first connection plate 211 through bolts, and when the rotor core 23 rotates, the double-flange connection plate 22 is driven to rotate, so that the fan blade structure 26 rotates to cool the rotor structure 2.

Specifically, the other end of the transmission shaft 27 penetrates through the rotor core 23, is arranged in the axle center 205 of the double-flange connection disc 22, enables the tail end of the transmission shaft to be connected with the transmission shaft 4 of the generator in a meshed mode, is fixed through bolts, and the engine drives the transmission shaft 27 to rotate through the transmission shaft 4, so that the rotor core 23 is driven to rotate, and the rotor structure 2 is driven to rotate.

Specifically, combining the rotor core 23 shown in fig. 4, a square key slot 201 along the axial direction of the axle center 205 is formed in the front end of the double-flange connecting disc 22, and the transmission shaft 4 of the engine is matched and connected with the square key slot 201, so that the straight column transmission is realized, the key slot processing difficulty can be reduced through the square key slot 201, the installation and the connection are more convenient, and meanwhile, the transmission efficiency is ensured.

Specifically, as shown in fig. 2 and fig. 3, the periphery of the rotor core 23 is provided with magnets 25, the magnets 25 are circumferentially distributed on the rotor core 23, and in combination with the right view of the rotor structure 2 shown in fig. 5, the magnets 25 are divided into 6 groups, each group includes 2 permanent magnets 203, and the length L of each permanent magnet 203 is 60+0.5mm, that is, the length is 60mm, and the error can be increased by 0.5 mm. Referring to fig. 6 and 7, the distribution of the magnets 25 is shown in fig. 6, for example, two permanent magnets a are a group and two permanent magnets B are B group, and the two permanent magnets a are connected in parallel at an included angle of 30 ° in circumference, that is, in parallel with homopolar directions N-N or (S-S) shown in fig. 7; the magnets 25 of the A group and the B group are connected in series and fit, namely, the different poles between the A group and the B group are connected in series towards N-S. In this embodiment, as shown in fig. 8, taking the permanent magnet a as an example, the permanent magnet 203 has a fan-shaped structure, and the thickness H of the magnetization direction is 16-0.1mm, that is, the thickness of the permanent magnet 203 in the saturation direction is 15.9-16mm. The pole radian a is 60 degrees, so that the magnetic receiving area of the stator structure 2 is effectively increased, and the magnetic field intensity is increased. A conical through hole 213 is further formed in the middle of the permanent magnet blocks 203, and the permanent magnet blocks 203 are fixed on the rotor core 23 through the through hole 213 by bolts, so that the repulsive force among the permanent magnet blocks is overcome, and the uniform distribution of the magnets is realized.

In the embodiment, the rotating shaft 21 is in a straight column structure, the traditional conical transmission is changed into the straight column transmission, the transmission loss is reduced, and meanwhile, the square key groove 201 is adopted for connection, so that the structure is simpler and more convenient and the processing is facilitated; meanwhile, the rotor structure 2 and the engine are connected by adopting the double-flange connecting disc 22, so that the operation is simpler and more convenient, the connection is more stable, the transmission shake is effectively reduced, and the interference is reduced.

In the utility model, 6 groups of magnets 25 are adopted, each group of magnets 25 are connected in parallel and then connected in series, the internal electromagnetic field structure is changed, the magnetic energy product is effectively improved, the magnetic field is stronger, the higher the generated voltage is, the higher the generated power is under the same volume, and the high-power output is realized. Meanwhile, the permanent magnet is adopted as a magnet, so that the magnetic efficiency is higher, and the service life is longer.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. An electromagnetic structure of a generator, which is characterized in that: the rotor structure is arranged inside the stator structure, the rotor structure comprises a rotating shaft and a rotor iron core, and the rotor iron core is arranged on the rotating shaft; the rotating shaft is of a straight shaft structure, an inwards concave stepped groove is formed in the end part of one end of the rotating shaft, a transmission shaft is arranged in the rotating shaft, and one end of the transmission shaft penetrates through the rotating shaft and is fixed in the stepped groove; the other end of the rotating shaft is provided with a double-flange connecting disc, and the other end of the transmission shaft penetrates through the rotating shaft and is arranged in the double-flange connecting disc; 6 groups of magnets are arranged on the rotor core, and the circumferences of the 6 groups of magnets are uniformly distributed on the periphery of the rotor core; each group of magnets is connected in series, and each group of magnets comprises two permanent magnet blocks which are arranged in parallel.

2. A generator electromagnetic structure as claimed in claim 1, wherein: the magnets of each group are bonded in series; the two permanent magnets are connected in parallel at a circumferential angle of 30 degrees.

3. A generator electromagnetic structure as claimed in claim 1, wherein: the permanent magnet block is of a fan-shaped structure, the length L of the permanent magnet block is 60+0.5mm, the thickness H of the permanent magnet block in the magnetization direction is 16-0.1mm, and the polar arc degree a is 60 degrees.

4. A generator electromagnetic structure as claimed in claim 1, wherein: a fixed disc is arranged at the tail end of the transmission shaft; the fixed disk is of a disk structure and forms a T-shaped structure with the transmission shaft, and the fixed disk is arranged in the stepped groove.

5. A generator electromagnetic structure as claimed in claim 1, wherein: square key grooves are formed in the double-flange connecting disc; the connecting end of the engine is connected with the double-flange connecting disc through a square key slot and is connected with the transmission shaft.

6. A generator electromagnetic structure as claimed in claim 1, wherein: the rotating shaft and the rotor core are integrally formed.

7. The electromagnetic structure of claim 5, wherein: the double-flange connecting disc comprises an axle center which is a hollow shaft, and the other end of the transmission shaft is arranged in the hollow shaft; the axle center is provided with a first connecting disc and a second connecting disc at intervals.

8. The electromagnetic structure of claim 7, wherein: the rotor core is provided with a circular groove, and the second connecting disc is connected with the rotor core through the groove.

9. The electromagnetic structure of claim 7, wherein: the square key groove is arranged on the inner wall of the axle center.

10. A generator electromagnetic structure as claimed in claim 9, wherein: a fan blade structure is further arranged on one side of the first connecting disc.