阅读说明：本技术 一种电磁悬架用直线作动器 (A kind of electromagnetic suspension linear actuator ) 是由 赵文祥 凌志健 吉敬华 徐媚媚 于 2019-07-25 设计创作，主要内容包括：本发明是一种电磁悬架用直线作动器。属于磁力传动领域,包括复合转子、内定子、动子、支撑轴承、弹簧、以及底座构成。所述的复合转子,内侧由表贴式圆弧磁体构成,外侧由螺旋磁极构成；所述的内定子与复合转子内侧磁体耦合形成外转子电机结构,绕组采用分数槽集中绕组；所述动子内侧由螺旋磁体构成,与复合转子外侧螺旋磁体耦合,实现将旋转运动转化为直线的运动；所述的动子的直线轴承由花键结构和石墨铜轴承构成；所述弹簧安装固定在动子与底座之间。本发明提高了悬架用直线作动器可靠性、推力密度,实现了无接触磁力传动。并且可以将减震与悬架一体化设计,减小体积和重量。(The present invention is a kind of electromagnetic suspension linear actuator.Belong to magnetic drives field, including composite rotors, inner stator, mover, spring bearing, spring and pedestal are constituted.The composite rotors, inside are made of surface-mount type arc magnet, and outside is made of spiral magnetic pole；The inner stator couples to form outer rotor motor structure with composite rotors inner magnet, and winding uses fractional-slot concentratred winding；It is made of on the inside of the mover helimagnet, is coupled with composite rotors outer helical magnet, realize the movement for converting rotary motion in straight line；The linear bearing of the mover is made of spline structure and graphite copper bearing；The spring is fixed between mover and pedestal.The present invention improves suspension linear actuator reliability, thrust density, realizes Contactless magnetic transmission.And damping and suspension integrated design can be reduced into volume and weight.)

1. a kind of electromagnetic suspension linear actuator, which is characterized in that including composite rotors (1), inner stator (2), mover (3), Graphite copper linear bearing (4-1) and (4-2), mover pedestal (8), support shaft (7), spring arrangement (5) and pedestal (6)；It is described Composite rotors (1), inside is made of surface-mount type arc magnet, and outside is made of spiral magnetic pole；The inner stator (2) is located at Composite rotors (1) is internal, couples to form outer rotor motor structure with composite rotors (1) inner arc magnet；

Inner stator (2) is mounted in the support shaft (7) connecting with pedestal (6) center, and inner stator is provided with stator winding on (2), Using fractional-slot concentratred winding；Mover (3) empty set is external in composite rotors (1)；By helimagnet structure on the inside of mover (3) At, coupled with composite rotors (1) outer helical magnet, mover (3) axial length be greater than composite rotors (1) axial length part For the rectilinear path of electromagnetic suspension, the movement for converting rotary motion in straight line is realized；The linear bearing of the mover (3) by Graphite copper bearing (4-1) and (4-2) are constituted；One end on mover (3) far from pedestal (6) is mover pedestal (8), the spring dress (5) are set to be fixed between mover pedestal (8) and pedestal (6).

2. a kind of electromagnetic suspension linear actuator according to claim 1, which is characterized in that

Mover (3) and composite rotors (1) spiral magnetic circuit use the lead of screw of equal length, and there are N, S, N, S in each lead 2 pairs of pole spiral magnetic circuits of distribution, theoretically i.e. rotor rotates a circle, and mover can promote the distance of a lead.

3. a kind of electromagnetic suspension linear actuator according to claim 1, which is characterized in that the outside of composite rotors 1 Spiral magnetic pole on the inside of spiral magnetic pole and mover (3) is all made of identical lead of screw and the mode that magnetizes, is all made of rare earth permanent magnet Material.

4. a kind of electromagnetic suspension linear actuator according to claim 1, which is characterized in that graphite copper bearing (4-1) (4-2) is separately mounted on support shaft (7), and graphite copper bearing (4-1) is fixed on one end of support shaft (7), graphite copper bearing The outside of (4-1) and mover (3) interior side contacts realize linear slide；The inside of graphite copper bearing (4-2) and support shaft (7) Outer side contacts realize linear slide.

5. a kind of electromagnetic suspension linear actuator according to claim 1, which is characterized in that composite rotors (1) outer diameter For 55mm, rotor axial length is 60mm.

6. a kind of electromagnetic suspension linear actuator according to claim 1, which is characterized in that composite rotors (1) uses Outer rotor motor driven.

7. a kind of electromagnetic suspension linear actuator according to claim 6, which is characterized in that the iron of composite rotors (1) The heart is made by electrician's iron material.

8. a kind of electromagnetic suspension linear actuator according to claim 6, which is characterized in that on the inside of composite rotors (1) It is made of the permanent magnetic ring of the pole N, S radial magnetizing, is coupled with inner stator (2) and generate torque.

Technical field

The present invention relates to a kind of electromagnetic vehicle suspension fields, are related specifically to a kind of high pushing force density magnetic drives straight line work Dynamic device.

Background technique

Electromagnetic suspension actuator can be obtained good according to the travel situations on road surface by the rigidity and damping that adjust suspension Riding comfort and control stability, therefore key factor of the electromagnetic suspension as vehicle performance evaluation index.

Document IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 60 (10): 4546-4553,2013 (Impact of traffic conditions on the active suspension energy regeneration in Hybrid electric vehicles) describe a kind of suspension system that rotating electric machine is integrated with ball-screw transmission mechanism. Although this structure has biggish power energy density, linear motion is converted rotational motion into.But ball-screw transmission mechanism The shortcomings that also denounced by scholar in the industry always.Ball-screw not can avoid mechanical wear, dynamic property etc. as transmission mechanism The stuck problem of problem, especially ball-screw reduces service life, runnability and the reliability of actuator.And motor External structure, due to using revolving joint, to increase transfer complex degree and volume.

Document IEEE TRANSACTIONS ON MAGNETICS, 52 (7): 8104804,2016 (Design and analysis of low-cost tubular fault-tolerant interior permanent-magnet motor) It describes one kind and is applied to electromagnetic suspension cylindrical linear motor, although the structure can satisfy dynamic property and reliability, Its thrust density endures dispute to the fullest extent.Therefore, the electricity for taking into account thrust density, reliability and dynamic property is realized using effective method Magnetcisuspension rack device just has important theory significance and practical value.

Summary of the invention

According to the thrust performance of electromagnetic vehicle suspension, aiming at the problems existing in the prior art, the present invention devises one kind High pushing force density, highly reliable, low abrasion, compact-sized electromagnetic suspension linear actuator.

In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme:

One electromagnetic suspension linear actuator, including composite rotors 1, inner stator 2, mover 3, graphite copper linear bearing 4- 1 and 4-2, mover pedestal 8, support shaft 7, spring arrangement 5 and pedestal 6；The composite rotors 1, inside is by surface-mount type circular arc Magnet is constituted, and outside is made of spiral magnetic pole；The inner stator 2 is located inside composite rotors 1, with circle on the inside of composite rotors 1 Arc magnet couples to form outer rotor motor structure；

Inner stator 2 is mounted in the support shaft 7 connecting with 6 center of pedestal, and stator winding is provided on inner stator 2, is used Fractional-slot concentratred winding；The mover 3 is arranged outside composite rotors 1；3 inside of mover is made of helimagnet, with compound turn Sub 1 outer helical magnet coupling, realizes the movement for converting rotary motion in straight line；The linear bearing of the mover 3 is by stone Black copper bearing 4-1 and 4-2 are constituted；One end on mover 3 far from pedestal 6 is mover pedestal 8, and the installation of spring arrangement 5 is fixed Between mover pedestal 8 and pedestal 6.

Further, mover 3 and 1 spiral magnetic circuit of composite rotors use the lead of screw of equal length, exist in each lead N, 2 pairs of pole spiral magnetic circuits of S, N, S distribution, theoretically i.e. rotor rotates a circle, and mover can promote the distance of a lead.

Further, graphite copper bearing 4-1 and 4-2 is separately mounted in support shaft 7, and graphite copper bearing 4-1 is fixed on support One end of axis 7, the outside of graphite copper bearing 4-1 and 3 interior side contacts of mover, realize linear slide；The inside of graphite copper bearing 4-2 With the outer side contacts of support shaft 7, linear slide is realized.

The composite rotors and mover, the two is coaxial, and mover is covered in the outside of composite rotors, and mover axial length is big In rotor axial length.Spiral magnetic pole on the inside of the outer helical magnetic pole and mover of composite rotors, is all made of identical lead of screw With the mode of magnetizing, it is all made of rare earth permanent-magnetic material, the opposite spiral shape permanent magnet of two kinds of magnetizing directions is with the pole N, S turn of the screw Form arrangement.

It is made of on the inside of the composite rotors the system permanent magnetic ring of the pole N, S radial magnetizing, generation is coupled with inner stator Torque.The iron core of composite rotors is made by electrician's iron material.

The inner stator is mounted in the support shaft connecting with pedestal, and it is mobile will not to generate axial or radial position.

The mover, empty set realize straight reciprocating motion by the coupling of helical magnetic field in the outside of composite rotors, The part that its axial length is greater than composite rotors axial length is the rectilinear path of electromagnetic suspension, can be according to the practical need of vehicle It asks and is adjusted.

The linear bearing of the mover is formed using graphite copper bearing, which is fixed on connect with pedestal Support shaft on, it is mobile that axial or radial position will not be generated.

The spring arrangement, empty set are connected in the outside of mover, and with one end of mover, and the other end is connected with pedestal It connects, with the movement of mover, damping and the real-time adjusting of rigidity may be implemented.

The present invention is applicable not only to electromagnetic suspension, and suitable for the neck such as aerospace, artificial heart pump, ocean power generation Domain.Compared to traditional linear motor, since magnetic Screw is magnetic drives, thus have overload capability it is strong, maintenance cost The advantages that low and cleannes are high.

The present invention is after adopting the above technical scheme, have the following beneficial effects:

1, the present invention uses the Integrated design of motor and magnetic Screw, and compared to the linear motor of same size, thrust is close Degree can be obviously improved；Compared to ball-screw transmission mechanism, on the basis of guaranteeing high force-energy density, the system of significantly improving can By property and dynamic property.

2, the present invention uses external rotor electric machine and magnetic Screw structure, is effectively increased magnetic work area, so as to With further lifting force energy density.

3, the magnetic Screw drive technology that the present invention uses, can be extremely right by changing the helimagnet under constant lead Number, to realize the ratio of revolving speed and space rate.Such as in the present invention, rotor helical-screw magnet number of pole-pairs and mover helimagnet Number of pole-pairs is 2, and specific number of pole-pairs cooperation can be chosen according to the specific requirement of vehicle suspension.

Detailed description of the invention

Following drawings is the embodiment of the present invention, in which:

Attached drawing 1 is stereochemical structure and half-section diagram of the present invention；

Attached drawing 2 is spiral magnetic structure half-section diagram of the invention；

Attached drawing 3 is mover bearing assembling schematic diagram of the invention；

Attached drawing 4 is the thrust performance schematic diagram to propose a plan.

Specific embodiment

Below according to Figure of description and specific embodiment, the present invention will be further explained.

Such as Fig. 1, an electromagnetic suspension linear actuator, including composite rotors 1, inner stator 2, mover 3, graphite copper straight line Bearing 4-1 and 4-2, mover pedestal 8, support shaft 7, spring arrangement 5 and pedestal 6 are constituted.The composite rotors 1, inside by Surface-mount type arc magnet is constituted, and outside is made of spiral magnetic pole；The inner stator 2 couples shape with 1 inner magnet of composite rotors At outer rotor motor structure, inner stator 2 is mounted in the support shaft 7 connecting with pedestal 6, stator winding using fractional-slot concentrate around Group；It is made of on the inside of the mover helimagnet, is coupled with composite rotors outer helical magnet, realization converts rotary motion to The movement of straight line；The linear bearing of the mover is made of graphite copper bearing 4-1 and 4-2；The installation of spring arrangement 5 is fixed Between mover pedestal 8 and pedestal 6.

As shown in Fig. 2, mover and rotor helical-screw magnetic circuit use for rotor helical-screw magnetic circuit and mover spiral magnetic circuit in the present invention The lead of screw of equal length, there are 2 pairs of pole spiral magnetic circuits of N, S, N, S distribution in each lead, and theoretically i.e. rotor rotates One week, mover can promote the distance of a lead.

As shown in figure 3, graphite copper bearing 4-1 and 4-2 are separately mounted in support shaft 7, graphite for the method for mover assembly Copper bearing 4-1 is fixed on one end of support shaft 7, the outside of graphite copper bearing 4-1 and 3 interior side contacts of mover, realizes that straight line is sliding It is dynamic.The inside of graphite copper bearing 4-2 and the outer side contacts of support shaft 7, realize linear slide.This design effectively reduces straight line The volume and linear guide of actuator draw the length of axis.

It is 55mm in rotor diameter, rotor axial length is for the thrust performance of the linear actuator of proposition shown in Fig. 4 Under the volume of 60mm, thrust is far longer than the linear motor of same size up to 3.6kN, and thrust performance can be with machinery Ball-screw matches in excellence or beauty.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description Point can be combined in any suitable manner in any one or more of the embodiments or examples.

Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this The range of invention is defined by the claims and their equivalents.