阅读说明：本技术 一种传动比可变的磁场调制式磁性齿轮 (Magnetic field modulation type magnetic gear with variable transmission ratio ) 是由 王均刚 徐帅睿 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种传动比可变的磁场调制式磁性齿轮,包括从内到外依次设置的内转子、调磁环和外转子,所述调磁环包括若干个调磁块,所述内转子包括位于内转子铁芯和若干个设于所述内转子铁芯外侧的内转子棒状永磁体,所述外转子包括若干个外转子棒状永磁体以及设于所述外转子棒状永磁体外侧的外转子铁芯,所述内转子、所述调磁环和所述外转子构成同轴拓扑结构集合的同芯式结构,所述内转子与所述调磁环之间、所述调磁环与所述外转子之间均设有气隙,所述磁场调制式磁性齿轮满足条件式：N+P＝S；其中,N为所述内转子的磁极对数,P为所述外转子的磁极对数,S为所述调磁块的个数。该磁场调制式磁性齿轮能够实现传动比可变。(The invention discloses a magnetic field modulation type magnetic gear with variable transmission ratio, which comprises an inner rotor, a magnetic modulation ring and an outer rotor which are sequentially arranged from inside to outside, wherein the magnetic modulation ring comprises a plurality of magnetic modulation blocks, the inner rotor comprises an inner rotor iron core and a plurality of inner rotor rod-shaped permanent magnets arranged on the outer side of the inner rotor iron core, the outer rotor comprises a plurality of outer rotor rod-shaped permanent magnets and an outer rotor iron core arranged on the outer side of the outer rotor rod-shaped permanent magnets, the inner rotor, the magnetic modulation ring and the outer rotor form a concentric structure of a coaxial topological structure set, air gaps are respectively arranged between the inner rotor and the magnetic modulation ring and between the magnetic modulation ring and the outer rotor, and the magnetic field modulation type magnetic gear meets the condition formula: n + P ═ S; n is the number of magnetic pole pairs of the inner rotor, P is the number of magnetic pole pairs of the outer rotor, and S is the number of the magnetic adjusting blocks. The magnetic field modulation type magnetic gear can realize variable transmission ratio.)

1. A magnetic field modulation type magnetic gear with a variable transmission ratio is characterized by comprising an inner rotor, a magnetic modulation ring and an outer rotor which are sequentially arranged from inside to outside, wherein the magnetic modulation ring comprises a plurality of magnetic modulation blocks, the inner rotor comprises an inner rotor iron core and a plurality of inner rotor rod-shaped permanent magnets arranged on the outer side of the inner rotor iron core, the outer rotor comprises a plurality of outer rotor rod-shaped permanent magnets and an outer rotor iron core arranged on the outer side of the outer rotor rod-shaped permanent magnets, the inner rotor, the magnetic modulation ring and the outer rotor form a concentric structure of a coaxial topological structure set, air gaps are arranged between the inner rotor and the magnetic modulation ring and between the magnetic modulation ring and the outer rotor, and the magnetic field modulation type magnetic gear meets the condition formula: n + P ═ S; n is the number of magnetic pole pairs of the inner rotor, P is the number of magnetic pole pairs of the outer rotor, and S is the number of the magnetic adjusting blocks.

2. The variable-transmission-ratio magnetic field modulated magnetic gear according to claim 1, wherein the magnetic modulating ring comprises a plurality of annular silicon steel sheets arranged in a stacked manner, and a plurality of magnetic modulating blocks are uniformly distributed on the outer circumference of the silicon steel sheets.

3. The variable-ratio magnetic field modulated magnetic gear of claim 2, wherein the flux modulating ring further comprises two annular insulating spacers, and the silicon steel sheet is positioned between the two insulating spacers.

4. A variable ratio magnetic field modulated magnetic gear according to claim 3 in which the insulating spacer and the silicon steel sheet are secured together by means of inter-connecting bridges engaging bolts.

5. The variable-ratio, magnetic-field-modulated magnetic gear of claim 1, wherein the magnetic-field-modulated magnetic gear satisfies the conditional expression:

M₁/N＝K₁；

M₂/P＝K₂；

wherein M is₁The number of the inner rotor rod-shaped permanent magnets M₂The number of the outer rotor rod-shaped permanent magnets M2, K₁Is a positive integer, K₂Is a positive integer.

6. The variable-ratio magnetic field modulated magnetic gear of claim 1, wherein the inner rotor bar permanent magnets are radially magnetized.

7. The variable-ratio magnetic field modulated magnetic gear of claim 1, wherein the direction of magnetization of the outer rotor bar permanent magnets is radial magnetization.

8. The variable-ratio magnetic field modulated magnetic gear of claim 5, wherein the number of the inner rotor bar permanent magnets is 36, the number of the outer rotor bar permanent magnets is 56, and the number of the magnetic tuning blocks is 16.

Technical Field

The invention relates to the technical field of power transmission equipment, in particular to a magnetic field modulation type magnetic gear with a variable transmission ratio.

Background

In contrast to conventional gears, magnetic gears do not have substantially the tooth profile of conventional gears, which are based on the repulsion and attraction of magnetic coupling forces for transmission purposes, so called magnetic gears are merely structurally similar to conventional gears and are consistent in transmission purposes, but are not inherently affiliated with conventional gears.

The magnetic field modulation type magnetic gear with the existing structure consists of three parts: inner rotor, accent magnetic ring and outer rotor. The inner rotor comprises an inner rotor yoke iron core and an inner rotor permanent magnet, the outer rotor comprises an outer rotor yoke iron core and an outer rotor permanent magnet, and the permanent magnets are mounted on the outer surface of the inner rotor and the inner surface of the outer rotor. The permanent magnets on the inner rotor and the outer rotor are magnetized in the radial direction, and a radial magnetic field is formed in a magnetic circuit.

The permanent magnet of the traditional magnetic field modulation type coaxial magnetic gear is generally in an arc-shaped fixed structure, the magnetic pole pair number of the permanent magnet of the traditional magnetic gear is determined along with the determination of the mechanical structure of the permanent magnet, and the transmission ratio of a transmission system is also determined along with the determination, so that the transmission ratio of the coaxial magnetic gear cannot be changed along with the change of working conditions.

Disclosure of Invention

The invention aims to provide a magnetic field modulation type magnetic gear with a variable transmission ratio.

A magnetic field modulation type magnetic gear with a variable transmission ratio comprises an inner rotor, a magnetic modulation ring and an outer rotor which are sequentially arranged from inside to outside, wherein the magnetic modulation ring comprises a plurality of magnetic modulation blocks, the inner rotor comprises an inner rotor iron core and a plurality of inner rotor rod-shaped permanent magnets, the inner rotor is arranged on the outer side of the inner rotor iron core, the outer rotor comprises a plurality of outer rotor rod-shaped permanent magnets and an outer rotor iron core, the outer rotor iron core is arranged on the outer side of the outer rotor rod-shaped permanent magnets, the inner rotor, the magnetic modulation ring and the outer rotor form a concentric structure of a coaxial topological structure set, air gaps are arranged between the inner rotor and the magnetic modulation ring and between the magnetic modulation ring and the outer rotor, and the: n + P ═ S; n is the number of magnetic pole pairs of the inner rotor, P is the number of magnetic pole pairs of the outer rotor, and S is the number of the magnetic adjusting blocks.

According to the magnetic field modulation type magnetic gear provided by the invention, the inner rotor, the magnetic modulation ring and the outer rotor form a concentric topological structure of a coaxial topological structure set, an arc-shaped structure of a traditional magnetic gear permanent magnet is replaced by a rod-shaped topological structure, and the magnetic field modulation type magnetic gear meets the conditional expression: n + P is S, and N is the magnetic pole pair number of inner rotor, and P is the magnetic pole pair number of outer rotor, and S is the number of adjusting the magnetic path piece, consequently, can just can realize that the drive ratio is variable through the magnetic pole pair number N who changes the inner rotor (or the magnetic pole pair number P of outer rotor), satisfies the needs of different operating modes.

In addition, according to the magnetic field modulation type magnetic gear with variable transmission ratio provided by the invention, the following additional technical characteristics can be provided:

furthermore, the magnetic adjusting ring comprises a plurality of annular silicon steel sheets which are stacked, and the magnetic adjusting blocks are uniformly distributed on the outer circumference of the silicon steel sheets.

Furthermore, the magnetic adjusting ring further comprises two annular insulating gaskets, and the silicon steel sheet is located between the two insulating gaskets.

Further, the insulating spacer and the silicon steel sheet are fixed together in a mode that an inner connecting bridge is matched with a bolt.

Further, the magnetic field modulation type magnetic gear satisfies a conditional expression:

M₁/N＝K₁；

M₂/P＝K₂；

wherein M is₁The number of the inner rotor rod-shaped permanent magnets M₂The number of the outer rotor rod-shaped permanent magnets M2, K₁Is a positive integer, K₂Is a positive integer.

Further, the magnetizing direction of the inner rotor rod-shaped permanent magnet is radial magnetizing.

Further, the outer rotor rod-shaped permanent magnet is magnetized in the radial direction.

Furthermore, the number of the inner rotor rod-shaped permanent magnets is 36, the number of the outer rotor rod-shaped permanent magnets is 56, and the number of the magnetic adjusting blocks is 16.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a variable ratio magnetic field modulated magnetic gear according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an assembly structure of a variable-ratio magnetic field modulated magnetic gear according to an embodiment of the present invention;

FIG. 3 is a schematic front view of the structure of FIG. 2 (without the insulating spacer);

fig. 4 is a schematic diagram of the principle of changing the transmission ratio by changing the rotation angle of the permanent magnet.

Detailed Description

In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not indicate or imply that the referenced device or element must be in a particular orientation, constructed or operated in a particular manner, and is not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, a magnetic field modulation type magnetic gear with a variable transmission ratio according to an embodiment of the present invention includes an inner rotor 10, a magnetic field modulation ring 20, and an outer rotor 30 sequentially arranged from inside to outside.

The inner rotor 10 includes that it locates to be located inner rotor iron core 11 and a plurality of locate the rodlike permanent magnet 12 of inner rotor in the inner rotor iron core 11 outside, specifically, the rodlike permanent magnet 12 of inner rotor can be fixed through first sleeve 13, and first sleeve 13 can lead magnetic. The magnetizing direction of the inner rotor rod-shaped permanent magnet 12 is radial magnetizing.

The magnetic adjusting ring 20 includes a plurality of magnetic adjusting blocks 21, specifically, the magnetic adjusting ring 30 includes a plurality of annular silicon steel sheets 22 stacked in layers, and the plurality of magnetic adjusting blocks 21 are uniformly distributed on the outer circumference of the silicon steel sheets 22.

The magnetic adjusting ring 20 further comprises two annular insulating spacers 23, and the silicon steel sheet 22 is located between the two insulating spacers 23.

Specifically, the insulating spacer 23 and the silicon steel sheet 22 are fixed together by means of an inner connecting bridge matching with the bolt 24.

The outer rotor 30 includes a plurality of outer rotor rod-shaped permanent magnets 31 and an outer rotor core 32 disposed outside the outer rotor rod-shaped permanent magnets 31, specifically, the outer rotor rod-shaped permanent magnets 31 may be fixed by a second sleeve 33, and the second sleeve 33 is magnetically conductive. The magnetizing direction of the outer rotor rod-shaped permanent magnet 31 is radial magnetizing.

The inner rotor 10, the magnetic modulating ring 20 and the outer rotor 30 form a concentric structure of a coaxial topological structure set. Air gaps 40 are respectively arranged between the inner rotor 10 and the magnetic adjusting ring 20 and between the magnetic adjusting ring 20 and the outer rotor 30.

The magnetic field modulation type magnetic gear satisfies the conditional expression:

N+P＝S；

wherein, N is the magnetic pole pair number of the inner rotor 10, P is the magnetic pole pair number of the outer rotor 30, and S is the number of the magnetic adjusting blocks 21.

Thus, on the premise that N, P, S one of the parameters is not changed, the other two parameters are changed to achieve the purpose of changing the magnetic gear transmission ratio. Specifically, since the number of the magnetic adjusting blocks 21 is fixed after the product is designed, the transmission ratio is variable by changing the number of the magnetic pole pairs of the inner rotor 10 or the outer rotor 30.

Specifically, the magnetic field modulation type magnetic gear satisfies the conditional expression:

M₁/N＝K₁；

M₂/P＝K₂；

wherein M is₁The number of the inner rotor rod-shaped permanent magnets 12 is, for example, 36, M in the present embodiment₂The number M2 of the outer rotor rod-like permanent magnets 31 is, for example, 56 for the outer rotor rod-like permanent magnets 31, 16 for the magnetic tuning blocks 21, K in the present embodiment₁Is a positive integer, K₂Is a positive integer. That is, the number of the inner rotor rod-like permanent magnets 12 is an integral multiple of the number of pole pairs of the inner rotor 10, and the number of the outer rotor rod-like permanent magnets 31 is an integral multiple of the number of pole pairs of the outer rotor 30. The magnetic pole arrangement direction of the corresponding rod-shaped permanent magnets is changed by changing the rotation angle of the inner rotor rod-shaped permanent magnet 12 or the outer rotor rod-shaped permanent magnet 31, so that the magnetic pole number pairs of the inner rotor permanent magnet 12 (namely the magnetic pole number N of the inner rotor 10) or the magnetic pole number pairs of the outer rotor permanent magnet (namely the magnetic pole number P of the outer rotor 30) can be changed, and the transmission ratio is variable.

The following description is made on the principle of making the transmission ratio variable by changing the rotation angle of the permanent magnet:

referring to fig. 4, a first solution in fig. 4 is a fixed arc structure of a conventional magnetic gear, and the arc structure of the conventional magnetic gear permanent magnet is replaced by a rod-shaped topological structure, so that the magnetic pole arrangement direction of the corresponding rod-shaped permanent magnet can be changed by changing the rotation angle of the inner and outer rotor rod-shaped permanent magnets. And the magnetic pole pairs of the inner and outer rotor permanent magnets can be changed, so that the transmission device has a plurality of transmission ratios.

In the second scheme in fig. 4, 8 rod-shaped permanent magnet structures are adopted, codes are respectively 1-8 (an inner rotor rod-shaped permanent magnet 12 or an outer rotor rod-shaped permanent magnet 31, which is only explained by the principle here, and is not limited to be the rod-shaped permanent magnet of the inner rotor or the rod-shaped permanent magnet of the outer rotor), instead of arc-shaped permanent magnets, and the second scheme is still a magnetic pole pair.

In the third scheme in fig. 4, the number 3, 4, 5 and 6 rod-shaped permanent magnets are rotated by 180 degrees, so that the original number of pole pairs is changed into two number of pole pairs.

Further, in scheme 4 of fig. 4, the number 2, 3, 6 and 7 permanent magnets are rotated by 180 degrees, so that the number is changed from two pole pairs (scheme three) to four pole pairs (scheme four).

Therefore, the magnetic pole arrangement direction of the corresponding rod-shaped permanent magnets is changed by changing the rotation angle of the inner rotor rod-shaped permanent magnet 12 or the outer rotor rod-shaped permanent magnet 31, and then the magnetic pole number pairs of the inner rotor permanent magnet 12 (namely, the magnetic pole number N of the inner rotor 10) or the magnetic pole number pairs of the outer rotor permanent magnets (namely, the magnetic pole number P of the outer rotor 30) can be changed, so that the transmission ratio is variable.

According to the magnetic field modulation type magnetic gear provided by the embodiment, the inner rotor 10, the magnetic modulation ring 20 and the outer rotor 30 form a concentric structure of a coaxial topological structure set, and the arc-shaped structure of the conventional magnetic gear permanent magnet is replaced by a bar-shaped topological structure, so that the magnetic field modulation type magnetic gear satisfies the condition formula: the N + P is S, so the magnetic pole arrangement direction of the corresponding rod-shaped permanent magnet can be changed by changing the rotating angle of the inner rotor rod-shaped permanent magnet (or the outer rotor rod-shaped permanent magnet), and the magnetic pole number of the inner rotor permanent magnet (or the magnetic pole number of the outer rotor permanent magnet) can be changed, so that the transmission ratio is variable, and the requirements of different working conditions are met.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.