CN104917352A - Magnetic gear with magnetism regulating ring adopting chute structure for reducing torque pulsation - Google Patents
Magnetic gear with magnetism regulating ring adopting chute structure for reducing torque pulsation Download PDFInfo
- Publication number
- CN104917352A CN104917352A CN201510363879.0A CN201510363879A CN104917352A CN 104917352 A CN104917352 A CN 104917352A CN 201510363879 A CN201510363879 A CN 201510363879A CN 104917352 A CN104917352 A CN 104917352A
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- Prior art keywords
- speed rotor
- low speed
- high speed
- low
- magnetic ring
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Abstract
The invention discloses a magnetic gear. The magnetic ring comprises a low-speed rotor, a high-speed rotor and a magnetism regulating ring. The low-speed rotor and the high-speed rotor are respectively annular components and are coaxially arranged along the axial direction, and the outer diameters of the low-speed rotor and the high-speed rotor are the same; the low-speed rotor comprises a low-speed rotor iron core and a low-speed rotor permanent magnet for embedding the low-speed rotor iron core in a spoke manner; the high-speed rotor comprises a high-speed rotor iron core and a high-speed rotor permanent magnet for embedding the high-speed rotor iron core in an oblique inserting manner; the magnetism regulating ring adopting the chute structure is an annular component consisting of axially inclined magnetic conducting bodies arranged at equal intervals along the peripheral direction and is coaxially and fixedly mounted outside the high-speed rotor and the low-speed rotor, and the two side end faces of the magnetism resulting ring align to the outer side end faces of the high-speed rotor and the low-speed rotor respectively. Gaps are formed between the magnetism regulating ring and the high-speed rotor and between the magnetism regulating ring and the low-speed rotor in the radial direction, a gap is formed between the high-speed rotor and the low-speed rotor in the axial direction, and thus free rotation of the high-speed rotor and the low-speed rotor can be guaranteed. The magnetic gear disclosed by the invention has the characteristics of high torque transfer capacity, little torque pulsation and good transmission stability.
Description
Technical field
The present invention relates to a kind of magnetic gear being applicable to Non-contact speed-changing and driving, belong to gear technical field.
Background technology
Magnetic gear utilizes magnetic Field Coupling effect to carry out the transmission of torque; be a kind of Non-contact speed-changing transmission device, there is not the problems such as noise, vibrations, frictional dissipation and lubrication, and the physical isolation between constrained input can be realized; also possess overload self-shield ability, security reliability is higher.In recent years, along with the development of high-performance Ne-Fe-B permanent-magnet material, the research of New Magnetic Field Controlled gear topological structure receives increasing concern.
Torque transfer capability and transmission of torque stability evaluate two important indicators of magnetic gear performance, compared to conventional conversion type magnetic gear, field modulation type magnetic gear based on the work of magnetic field modulation principle has higher torque transfer capability, is the study hotspot of current magnetic field of gears.Field modulation type magnetic gear is generally made up of high speed rotor, low speed rotor and adjustable magnetic ring, the magnetic inductive block arranged by equi-spaced apart due to adjustable magnetic ring is formed, so magnetic circuit magnetic conductance is uneven, and the permanent magnet pole logarithm of high speed rotor is less, cause the torque pulsation of high speed rotor comparatively large, there is magnetic gear torque and transmit unstable phenomenon.In addition, compared with adopting the field modulation type magnetic gear of coaxial configuration, the field modulation type magnetic gear of axial arrangement is adopted to have greater advantage in ease of processing and Mechanical Reliability.Therefore, to the research with the magnetic gear topological structure that Mechanical Reliability is high, torque transfer capability is large, torque pulsation is little, transmission stability is good, there is important theory significance and practical construction value.
Summary of the invention
Technical problem: the problem that torque pulsation is large, transmission stability is poor that the present invention exists to solve existing field modulation type magnetic gear, provides the magnetic gear topological structure that a kind of adjustable magnetic ring adopts flume structure.
Technical scheme: magnetic gear of the present invention, comprises adjustable magnetic ring, low speed rotor, high speed rotor and shell; Described low speed rotor is loop configuration, comprises the low speed rotor permanent magnet of low speed rotor iron core and spoke type embedding low speed rotor iron core; Described high speed rotor is loop configuration, comprises the high speed rotor permanent magnet of high speed rotor iron core and angle-inserting type embedding high speed rotor iron core; Described low speed rotor and high speed rotor arranged in co-axial alignment vertically, between be provided with gap, and the two external diameter is identical; Described adjustable magnetic ring adopts flume structure, by the magnetic inductive block tilted the vertically along the circumferential direction annular element that rearranges of equi-spaced apart, coaxial heart is fixedly mounted on the outside of low speed rotor and high speed rotor, and the both sides end face of adjustable magnetic ring aligns with the end face outside of low speed rotor and high speed rotor respectively; Described shell is aluminum annular element, is closely enclosed in adjustable magnetic ring outside, for fixing adjustable magnetic ring; Air gap is provided with between the outer surface of described adjustable magnetic ring and low speed rotor, high speed rotor.
In the present invention, described low speed rotor permanent magnet and high speed rotor permanent magnet magnetize along the direction perpendicular with each self-embedding direction respectively, and adjacent permanent magnet magnetizing direction is contrary, form magneticfocusing N-S field structure.
In the present invention, the number of pole-pairs P of described low speed rotor permanent magnet
l, adjustable magnetic ring magnetic inductive block number N
s, high speed rotor permanent magnet number of pole-pairs P
hmeet following relation: N
s=P
l+ P
h, the gear graduation gearratio G that can realize
rfor: G
r=P
l: P
h.
In the present invention, the axial length L of described adjustable magnetic ring
s, low speed rotor axial length L
l, high speed rotor axial length L
h, end play distance L between low speed rotor and high speed rotor
gbetween meet following relation: L
s=L
l+ L
g+ L
h.
In the present invention, described adjustable magnetic ring adopts flume structure, and the angle [alpha] that adjustable magnetic ring magnetic inductive block tilts vertically is generally less than the pole span of adjustable magnetic ring, and described flume structure is equally applicable to the adjustable magnetic ring design of other form magnetic gear, such as traditional coaxial magnetic gear etc.
Beneficial effect: the magnetic gear structure that the invention provides a kind of improvement, has the following advantages:
1. in magnetic gear of the present invention, adjustable magnetic ring adopts flume structure, under the prerequisite not increasing manufacture difficulty and processing cost, can effectively reduce rotor torque pulsation, thus improve the stability of torque transmission, this is very important for improving the gear-driven dynamic steady-state behaviour of magnetic;
2. in magnetic gear of the present invention, high, low speed rotor all adopts permanent magnet to embed the structure of iron core, no matter be spoke damascene structures, or oblique cutting damascene structures, permanent magnet all can produce poly-magnetic effect, thus greatly can improve the torque transfer capability of magnetic gear;
3. the permanent magnet embedded structure that in magnetic gear of the present invention, high, low speed rotor adopts, compare the rotor permanent magnet surface-mount type structure that conventional coaxial magnetic gear adopts, the phenomenon that can effectively prevent permanent magnet from coming off when rotor high-speed rotates, further increases the Mechanical Reliability of rotor;
4. magnetic gear of the present invention adopts axial arrangement but not coaxial configuration, and high, low speed rotor is positioned at the inside of adjustable magnetic ring, and apportion both sides vertically, compare coaxial configuration, the manufacturing process of this axial magnetic gear is simple, easy to process, and reliability is high;
The present invention can obtain desirable runnability, is conducive to reducing rotor torque pulsation, improving gear-driven stability, and can improve torque transfer capability.
Accompanying drawing explanation
Fig. 1 is magnetic gear low speed rotor lateral section of the present invention structure;
Fig. 2 is magnetic high-speed gear rotor-side cross section structure of the present invention;
Fig. 3 is the flume structure schematic diagram of adjustable magnetic ring magnetic inductive block;
Fig. 4 is conventional coaxial magnetic gear cross section structure.
Have in figure: adjustable magnetic ring 1, adjustable magnetic ring magnetic inductive block 11, low speed rotor 2, low speed rotor iron core 21, low speed rotor permanent magnet 22, high speed rotor 3, high speed rotor iron core 31, high speed rotor permanent magnet 32, shell 4, air gap 5, outer air gap 6, interior air gap 7, inclined angle alpha.In figure, arrow represents permanent magnet magnetizing direction.
Embodiment
Magnetic gear of the present invention, comprises adjustable magnetic ring 1, low speed rotor 2, high speed rotor 3 and shell 4; Described low speed rotor 2 is loop configuration, comprises the low speed rotor permanent magnet 22 of low speed rotor iron core 21 and spoke type embedding low speed rotor iron core 21; Described high speed rotor 3 is loop configuration, comprises the high speed rotor permanent magnet 32 of high speed rotor iron core 31 and angle-inserting type embedding high speed rotor iron core 31; Described low speed rotor 2 and high speed rotor 3 arranged in co-axial alignment vertically, between be provided with gap, and the two external diameter is identical; Described adjustable magnetic ring 1 adopts flume structure, by the magnetic inductive block 11 tilted the vertically along the circumferential direction annular element that rearranges of equi-spaced apart, coaxial heart is fixedly mounted on the outside of low speed rotor 2 and high speed rotor 3, and the both sides end face of adjustable magnetic ring 1 aligns with the end face outside of low speed rotor 2 and high speed rotor 3 respectively; Described shell 4 is aluminum annular element, is closely enclosed in adjustable magnetic ring 1 outside, for fixing adjustable magnetic ring 1; Air gap 5 is provided with between the outer surface of described adjustable magnetic ring 1 and low speed rotor 2, high speed rotor 3.
In the present invention, described low speed rotor permanent magnet 22 and high speed rotor permanent magnet 32 magnetize along the direction perpendicular with each self-embedding direction respectively, and adjacent permanent magnet magnetizing direction is contrary, form magneticfocusing N-S field structure.
In the present invention, the number of pole-pairs P of described low speed rotor permanent magnet 22
l, adjustable magnetic ring magnetic inductive block 11 number N
s, high speed rotor permanent magnet 32 number of pole-pairs P
hmeet following relation: N
s=P
l+ P
h, the gear graduation gearratio G that can realize
rfor: G
r=P
l: P
h.
In the present invention, the axial length L of described adjustable magnetic ring 1
s, low speed rotor 2 axial length L
l, high speed rotor 3 axial length L
h, end play distance L between low speed rotor 2 and high speed rotor 3
gbetween meet following relation: L
s=L
l+ L
g+ L
h.
In the present invention, described adjustable magnetic ring 1 adopts flume structure, and the angle [alpha] that adjustable magnetic ring magnetic inductive block 11 tilts vertically is generally less than the pole span of adjustable magnetic ring, and described flume structure is equally applicable to the adjustable magnetic ring design of other form magnetic gear, such as traditional coaxial magnetic gear etc.
Below in conjunction with accompanying drawing, the present invention will be further described.
Adjustable magnetic ring 1 of the present invention is by the along the circumferential direction loop configuration that rearranges of equi-spaced apart after adjustable magnetic ring magnetic inductive block 11 vertically inclination certain angle α, the employing of adjustable magnetic ring flume structure can effectively reduce the rotor torque pulsation that magnetic inductive block saliency causes, thus improves the stability of magnetic gear torque transmission.In order to obtain dynamic steady state transmission performance preferably, in practical application, magnetic inductive block tilt angle alpha needs to be optimized design.
The flume structure that described adjustable magnetic ring 1 adopts, is equally applicable in the magnetic gear adjustable magnetic ring design of other version, such as, conventional coaxial magnetic gear etc. shown in Fig. 4.But no matter for the magnetic gear of which kind of version, its adjustable magnetic ring adopts flume structure design, all within protection scope of the present invention.
The flume structure adopted due to adjustable magnetic ring 1 can effectively reduce rotor torque pulsation, so, in magnetic gear of the present invention, low speed rotor 2 and high speed rotor 3 have employed the permanent magnet embedded arrangement with saliency, permanent magnet embedded structure can produce certain poly-magnetic effect, thus greatly can improve the torque transfer capability of magnetic gear.Certainly, in the present invention, high, low speed rotor also can adopt the rotor structure of other form, only needs to ensure that rotor can produce effective N-S magnetic pole.But no matter adopt which kind of version, all within protection scope of the present invention.
Described spoke type embeds the low speed rotor permanent magnet 22 circumferentially cutting orientation magnetizing of low speed rotor iron core 21, and adjacent permanent magnet magnetizing direction is contrary, forms magneticfocusing N-S field structure.
The high speed rotor permanent magnet 32 that described angle-inserting type embeds high speed rotor iron core 31 magnetizes along the direction perpendicular with embedding direction, and adjacent permanent magnet magnetizing direction is contrary, forms magneticfocusing N-S field structure.In order to obtain higher torque transfer capability, in practical application, the oblique cutting angle of high speed rotor permanent magnet 32 needs to be optimized design.
The coaxial heart of described adjustable magnetic ring 1 is fixedly mounted on the outside of low speed rotor 2 and high speed rotor 3, low speed rotor 2 and high speed rotor 3 lay respectively at the both sides, inside of adjustable magnetic ring 1, and the both sides end face of adjustable magnetic ring 1 aligns with the end face outside of low speed rotor 2 and high speed rotor 3 respectively.Low speed rotor 2 and high speed rotor 3 have identical external diameter, and the two is arranged in co-axial alignment vertically, between there is certain end play, meanwhile, adjustable magnetic ring 1 and be provided with air gap 5 between low speed rotor 2 and high speed rotor 3, thus can ensure that high, low speed rotor normally rotates.
Described adjustable magnetic ring magnetic inductive block 11, low speed rotor iron core 21, high speed rotor iron core 31 are made up of silicon steel laminations or other permeability magnetic material, identical with the stator-rotor iron core manufacturing process of common permagnetic synchronous motor.
Described shell 4 is closely enclosed in the outside of adjustable magnetic ring 1, and for fixedly mounting adjustable magnetic ring 1, shell 4 is made up of aluminium or other non-magnet material, identical with the shell manufacturing process of common permagnetic synchronous motor.
Described low speed rotor permanent magnet 22, high speed rotor permanent magnet 32 are made up of rare-earth Nd-Fe-B or other permanent magnetic material.
The magnetic field modulation function of adjustable magnetic ring 1, the permanent magnetic field that low speed rotor permanent magnet 22 (high speed rotor permanent magnet 32) produces can be produced a series of space harmonics magnetic field in air gap 5 internal modulation, when the number of pole-pairs of high speed rotor permanent magnet 32 (low speed rotor permanent magnet 22) equals the number of pole-pairs of wherein any one harmonic field, by magnetic Field Coupling effect, magnetic gear just can realize stable transmission of torque.In order to realize the effect of gear, necessarily require the number of pole-pairs of magnetic gear high, low speed rotor permanent magnet not identical.Now, when the number of adjustable magnetic ring magnetic inductive block 11 equals the number of pole-pairs sum of the number of pole-pairs of low speed rotor permanent magnet 22 and high speed rotor permanent magnet 32, the harmonic field of amplitude maximum can be utilized to realize optimum torque transfer capability.The i.e. number of pole-pairs P of the low speed rotor permanent magnet (22) of magnetic gear of the present invention
l, adjustable magnetic ring magnetic inductive block (11) number N
s, high speed rotor permanent magnet (32) number of pole-pairs P
hfollowing relation should be met:
N
s＝P
l+P
h(1)
Now, described magnetic gear high, low speed rotary speed of rotator is than meeting:
Ω
h:Ω
l＝P
l:P
h(2)
Ω
h, Ω
lbe respectively described magnetic gear high, low speed rotary speed of rotator.
Accordingly, the described magnetic gear variator drive ratio G that can realize
rfor:
G
r＝P
l:P
h(3)
The adjustable magnetic ring that the present invention relates to adopts the magnetic gear of flume structure not only can effectively reduce rotor torque pulsation, greatly improve the stability of magnetic gear torque transmission, and, the permanent magnet embedded structure that high, low speed rotor adopts can ensure that magnetic gear realizes higher torque transfer capability, and can improve the Mechanical Reliability of rotor.In addition, compare traditional coaxial magnetic gear, the design of the investigation mission outside the city or town magnet ring of described magnetic gear, inner rotor core is more reasonable, easy to process, low cost of manufacture, reliability are high.
Claims (5)
1. adjustable magnetic ring adopts a magnetic gear for flume structure torque ripple reduction, and it is characterized in that, this magnetic gear comprises adjustable magnetic ring (1), low speed rotor (2), high speed rotor (3) and shell (4);
Described low speed rotor (2) is loop configuration, comprises the low speed rotor permanent magnet (22) of low speed rotor iron core (21) and spoke type embedding low speed rotor iron core (21);
Described high speed rotor (3) is loop configuration, comprises the high speed rotor permanent magnet (32) of high speed rotor iron core (31) and angle-inserting type embedding high speed rotor iron core (31);
Described low speed rotor (2) and high speed rotor (3) arranged in co-axial alignment vertically, between be provided with gap, and the two external diameter is identical;
Described adjustable magnetic ring (1) adopts flume structure, by the magnetic inductive block tilted vertically (11) the along the circumferential direction annular element that rearranges of equi-spaced apart, coaxial heart is fixedly mounted on the outside of low speed rotor (2) and high speed rotor (3), and the both sides end face of adjustable magnetic ring (1) aligns with the end face outside of low speed rotor (2) and high speed rotor (3) respectively;
Described shell (4) is aluminum annular element, is closely enclosed in adjustable magnetic ring (1) outside, for fixing adjustable magnetic ring (1);
Air gap (5) is provided with between the outer surface of described adjustable magnetic ring (1) and low speed rotor (2), high speed rotor (3).
2. a kind of magnetic gear according to claim 1, it is characterized in that, described low speed rotor permanent magnet (22) and high speed rotor permanent magnet (32) magnetize along the direction perpendicular with each self-embedding direction respectively, and adjacent permanent magnet magnetizing direction is contrary, form magneticfocusing N-S field structure.
3. a kind of magnetic gear according to claim 1, is characterized in that, the number of pole-pairs P of described low speed rotor permanent magnet (22)
l, adjustable magnetic ring magnetic inductive block (11) number N
s, high speed rotor permanent magnet (32) number of pole-pairs P
hmeet following relation: N
s=P
l+ P
h, the gear graduation gearratio G that can realize
rfor: G
r=P
l: P
h.
4. a kind of magnetic gear according to claim 1, is characterized in that, the axial length L of described adjustable magnetic ring (1)
s, low speed rotor (2) axial length L
l, high speed rotor (3) axial length L
h, end play distance L between low speed rotor (2) and high speed rotor (3)
gbetween meet following relation: L
s=L
l+ L
g+ L
h.
5. a kind of magnetic gear according to claim 1, it is characterized in that, described adjustable magnetic ring (1) adopts flume structure, the angle [alpha] that adjustable magnetic ring magnetic inductive block (11) tilts vertically is generally less than the pole span of adjustable magnetic ring, and described flume structure is equally applicable to the adjustable magnetic ring design of other form magnetic gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363879.0A CN104917352A (en) | 2015-06-26 | 2015-06-26 | Magnetic gear with magnetism regulating ring adopting chute structure for reducing torque pulsation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363879.0A CN104917352A (en) | 2015-06-26 | 2015-06-26 | Magnetic gear with magnetism regulating ring adopting chute structure for reducing torque pulsation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104917352A true CN104917352A (en) | 2015-09-16 |
Family
ID=54086152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510363879.0A Pending CN104917352A (en) | 2015-06-26 | 2015-06-26 | Magnetic gear with magnetism regulating ring adopting chute structure for reducing torque pulsation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104917352A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915024A (en) * | 2016-05-27 | 2016-08-31 | 中国石油大学(华东) | High-performance field modulation magnetic gear |
| CN108418393A (en) * | 2018-05-02 | 2018-08-17 | 盐城哈力动力传动及智能装备产业研究院有限公司 | A kind of magnetic gear improving adjustable magnetic ring structure |
| CN111416501A (en) * | 2019-01-04 | 2020-07-14 | 国家电投集团科学技术研究院有限公司 | Magnetic gear device |
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2015
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Patent Citations (6)
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|---|---|---|---|---|
| JPS6231364A (en) * | 1985-07-29 | 1987-02-10 | Yoshiro Nakamatsu | Magnetic coupler |
| EP2133982A2 (en) * | 2008-06-13 | 2009-12-16 | Siemens Aktiengesellschaft | An electrical machine with integrated magnetic gears |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105915024A (en) * | 2016-05-27 | 2016-08-31 | 中国石油大学(华东) | High-performance field modulation magnetic gear |
| CN108418393A (en) * | 2018-05-02 | 2018-08-17 | 盐城哈力动力传动及智能装备产业研究院有限公司 | A kind of magnetic gear improving adjustable magnetic ring structure |
| CN111416501A (en) * | 2019-01-04 | 2020-07-14 | 国家电投集团科学技术研究院有限公司 | Magnetic gear device |
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| PB01 | Publication | ||
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Application publication date: 20150916 |