CN108361279A

CN108361279A - Orthogonal magnetic circuit journal axle one magnetic suspension bearing based on symmetrical self-lubricating flexibility auxiliary bearing structure

Info

Publication number: CN108361279A
Application number: CN201810109300.1A
Authority: CN
Inventors: 王坤; 李腾; 郑世强; 韩邦成
Original assignee: Beihang University
Current assignee: Beihang University
Priority date: 2018-02-05
Filing date: 2018-02-05
Publication date: 2018-08-03
Anticipated expiration: 2038-02-05
Also published as: CN108361279B

Abstract

The invention discloses a kind of orthogonal magnetic circuit journal axle one magnetic suspension bearings based on symmetrical self-lubricating flexibility auxiliary bearing structure, the radial direction magnetic bearing coil of the orthogonal magnetic circuit journal axle one magnetic suspension bearing is mounted in the stator tooth group of stator core, it is equipped at the outer disc of stator core there are the two of certain interval radial rigidity magnetic guiding loop, to prevent permanent magnetic circuit short-circuit；Axial magnetic bearing coil is located at the thrust disc of armature spindle, and axial magnetic bearing coil is mounted in the chamber that two magnetic guiding loops are formed；The both sides of thrust disc are respectively equipped with the graphite annulus and auxiliary bearing skeleton for playing axial self-lubricating；Radial auxiliary bearing skeleton and graphite internal projecting ring are set in the interior ring cavity of radial compliance magnetic guiding loop, play radial self-lubricating.The present invention is integrated as integrated technological means with radial electromagnetic circuit and radial direction magnetic bearing using axial with auxiliary bearing, solves the low technical problem of traditional magnetic bearing concentricity.

Description

Orthogonal magnetic circuit journal axle one magnetcisuspension based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held

Technical field

The present invention relates to magnetic suspension bearings, refer to that one kind being based on symmetrical self-lubricating flexibility auxiliary bearing knot more particularly The orthogonal magnetic circuit journal axle one magnetic suspension bearing of structure.

Background technology

Magnetic suspension bearing (Magnetic Bearing) be using magneticaction rotor suspension is made in aerial rotor with it is fixed There is no Mechanical Contact between son.

The structure of magnetic suspension motor is please referred to《Modeling and Design of 3-DOF Magnetic Bearing for High-Speed Motor Including Eddy-Current Effects and Leakage Effects》, happy rhythm of author etc., in June, 2016, the 6th phase of volume 63, was disclosed in " IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS”.Fig. 1 of this document describes a kind of overall structure of typical high speed magnetic suspension motor, In the right half part of described Fig. 1, formed by auxiliary bearing (Backup bearing) and journal axle one magnetic bearing (3-DOF MB) The radial support of the high speed magnetic suspension motor.

The shortcomings that conventional maglev bearing and auxiliary bearing are used cooperatively：

1, it is separately fixed on different parts from auxiliary bearing due to magnetic suspension bearing stator, makes magnetic suspension bearing stator It is extremely difficult to higher concentricity requirement with auxiliary bearing, and then keeps magnetic gap asymmetric with auxiliary gap, to make control be System is extremely difficult to the high-precision control of magnetic suspension bearing.

2, fierce collision will occur with auxiliary bearing when high speed magnetic suspended rotor unstability, due to conventional mechanical bearings rigidity Higher and damping is relatively low, and mechanical bearing ball is easy to be deformed by high-frequency percussion and make auxiliary bearing " stuck ", and then makes high speed Severe friction occurs for rotor and auxiliary bearing inner ring, and a large amount of frictional heat can be such that rotor with auxiliary bearing melts to be welded together, make High speed magnetic suspension motor is scrapped.

3, the axial length for making high speed magnetic suspension motor of magnetic suspension bearing and auxiliary bearing compares tradition machinery The length of bearing electric machine is very much (at least 2 times or so), thereby reduces the rigid mode of rotor.

Invention content

In order to improve the anti-unstability ability of high speed magnetic suspension motor and the rigid mode of rotor, and raising control system pair The control accuracy of magnetic suspension bearing, the present invention devise a kind of orthogonal magnetic circuit based on symmetrical self-lubricating flexibility auxiliary bearing structure Journal axle one magnetic suspension bearing.The magnetic suspension bearing is equipped with journal bearing part and cod part.Magnetic suspension shaft of the present invention It holds and on the one hand uses the power on coil generating electromagnetic magnetic circuit, permanent magnet is on the other hand utilized to generate permanent magnetic circuit, and electromagnetic circuit It is distributed for orthogonal space with permanent magnetic circuit.The permanent magnetic circuit is by flexible auxiliary bearing, using the structure of auxiliary bearing as magnetic axis The part for holding magnetic circuit saves the space of magnetic suspension bearing, but also the structure of magnetic bearing and auxiliary bearing can carry out one Bodyization designs, and then magnetic suspension motor overall structure is made to become compacter, reaches small size design.

The present invention is a kind of orthogonal magnetic circuit journal axle one magnetic suspension shaft based on symmetrical self-lubricating flexibility auxiliary bearing structure It holds, it is characterised in that：The orthogonal magnetic circuit journal axle one magnetic suspension bearing is from A axial directions magnetic guiding loop (1A), B axle to magnetic guiding loop (1D), permanent magnet A (1B), A radially magnetized rigidity magnetic guiding loops (1C), radially magnetized flexibility magnetic guiding loop (2A), B permanent magnets (2B), B Radially magnetized rigidity magnetic guiding loop (2C), A axial direction auxiliary bearing skeletons (3A), B axle are to auxiliary bearing skeleton (3C), A graphite evaginations Ring (3B), B graphite outer bulge loop (3D), radially magnetized bearing skeleton (4A), graphite internal projecting ring (4B), radially magnetized bearing baffle ring (4C), radial direction magnetic bearing coil group (5), axial magnetic bearing coil (5A) and stator core (8) composition；

The fine copper coiling that coil and axial magnetic bearing coil (5A) in radial direction magnetic bearing coil group (5) are line footpath 0.5mm；

The center of A axial directions magnetic guiding loop (1A) is equipped with the A central through holes (1A-1) passed through for armature spindle (6)；A is axially led The end face of magnet ring (1A) is smooth panel, and AA interior annulars are equipped with from the inside to the outside on the other end of A axial directions magnetic guiding loop (1A) (1A2), AA cavitys (1A3), AA convexes round platform (1A5), AB cavitys (1A4), AA outer toroids (1A1), the AB cavitys (1A4) For placing axial magnetic bearing coil (5A), the AA cavitys (1A3) are used to place the A axial direction auxiliary bearing skeletons after assembly (3A) and the outer bulge loop (3B) of A graphite；

B axle is equipped with the O central through holes (1D-1) passed through for armature spindle (6) to the center of magnetic guiding loop (1D)；B axle guide The end face of magnet ring (1D) is smooth panel, and B axle is equipped with BA interior annulars on the other end of magnetic guiding loop (1D) from the inside to the outside (1D2), BA cavitys (1D3), BA convexes round platform (1D5), BB cavitys (1D4), BA outer toroids (1D1), the BB cavitys (1D4) For placing axial magnetic bearing coil (5A), the BA cavitys (1D3) are used to place the B axle after assembly to auxiliary bearing skeleton (3C) and the outer bulge loop (3D) of B graphite；

The thrust disc (61) of armature spindle (6) be fastened on the AA convexes round platform (1A5) of A axial directions magnetic guiding loop (1A) and B axle to Between the BA convexes round platform (1D5) of magnetic guiding loop (1D)；

Radially magnetized flexibility magnetic guiding loop (2A) is equipped with outer toroid (2A1), interior annular (2A2), multiple triangle through hole (2A4), triangle through hole (2A4) make between outer toroid (2A1) and interior annular (2A2) that there are the flexible arm connecting (2A3)；It is more It is separated by flexible arm (2A3) between a triangle through hole (2A4)；

The center of radially magnetized flexibility magnetic guiding loop (2A) is equipped with the D central through holes (2A-1) passed through for armature spindle (6)； The end face of radially magnetized flexibility magnetic guiding loop (2A) is smooth panel, on the other end of radially magnetized flexibility magnetic guiding loop (2A) Equipped with convex round platform (2A5), convex round platform (2A5) is equipped with tapped blind hole (2A51), in interior dome platform (2A5) and interior annular Interior ring cavity (2A6) is equipped between (2A2)；Graphite internal projecting ring (4B), radially magnetized bearing are installed in the interior ring cavity (2A6) Baffle ring (4C) is fixed by screws on the convex round platform (2A5) of radially magnetized flexibility magnetic guiding loop (2A)；

The center of permanent magnet A (1B) is equipped with the B central through holes (1B-1) passed through for armature spindle (6)；

The center of B permanent magnets (2B) is equipped with the E central through holes (2B-1) passed through for armature spindle (6)；

The center of A radial rigidities magnetic guiding loop (1C) is equipped with C central through holes (1C-1), the ring of A radial rigidities magnetic guiding loop (1C) Internal side is equipped with A inner baffle rings (1C1)；

The center of B radial rigidities magnetic guiding loop (2C) is equipped with F central through holes (2C-1), the ring of B radial rigidities magnetic guiding loop (2C) Internal side is equipped with B inner baffle rings (2C1)；

The A inner baffle rings (1C1) of A radial rigidities magnetic guiding loop (1C) and the B inner baffle rings (2C1) of B radial rigidities magnetic guiding loop (2C) Between for placing the outer discs (8A) of stator core (8)；And A radial rigidities magnetic guiding loop (1C) and B radial rigidity magnetic guiding loops There are the gaps A (9) between (2C)；

The center of A axial direction auxiliary bearing skeletons (3A) is equipped with G central through holes (3A-1)；A axial direction auxiliary bearing skeletons (3A) End face be smooth panel, the other ends of A axial direction auxiliary bearing skeletons (3A) is equipped with AA round platforms (3A3) and AB round platforms (3A4)；On the AA round platforms (3A3) multiple AA through-holes passed through for AA graphite columns (3B1) are distributed with by even circumferential (3A1)；On the AB round platforms (3A4) multiple AB through-holes passed through for AB graphite columns (3B2) are distributed with by even circumferential (3A2)；

B axle is equipped with I central through holes (3C-1) to the center of auxiliary bearing skeleton (3C)；B axle is to auxiliary bearing skeleton (3C) End face be smooth panel, B axle to the other end of auxiliary bearing skeleton (3C) be equipped with BA round platforms (3C3) and BB round platforms (3C4)；On the BA round platforms (3C3) multiple BA through-holes passed through for BA graphite columns (3D1) are distributed with by even circumferential (3C1)；On the BB round platforms (3C4) multiple BB through-holes passed through for BB graphite columns (3D2) are distributed with by even circumferential (3C2)；

The center of the outer bulge loop (3B) of A graphite is equipped with H central through holes (3B-1), and H central through holes (3B-1) are used for armature spindle (6) It passes through；The end face of the outer bulge loop (3B) of A graphite is smooth panel, and the other end of the outer bulge loop (3B) of A graphite is equipped with by circumference point The AA graphite columns (3B1) and AB graphite columns (3B2) of cloth；The AA graphite columns (3B1) are mounted on A axial direction auxiliary bearing skeletons In the AA of (3A) in the AA through-holes (3A1) of round platform (3A3)；The AB graphite columns (3B2) are mounted on A axial direction auxiliary bearing skeletons In the AB through-holes (3A2) of the outer round platforms (3A4) of the AB of (3A)；

The center of the outer bulge loop (3D) of B graphite is equipped with P central through holes (3D-1), and P central through holes (3D-1) are used for armature spindle (6) It passes through；The end face of the outer bulge loop (3D) of B graphite is smooth panel, and the other end of the outer bulge loop (3D) of B graphite is equipped with by circumference point The BA graphite columns (3D1) and BB graphite columns (3D2) of cloth；The BA graphite columns (3D1) are mounted on B axle to auxiliary bearing skeleton In the BA of (3C) in the BA through-holes (3C1) of round platform (3C3)；The BB graphite columns (3C2) are mounted on B axle to auxiliary bearing skeleton In the BB through-holes (3C2) of the outer round platforms (3C4) of the BB of (3C)；

The center of radially magnetized bearing skeleton (4A) is equipped with J central through holes (4A-1)；On radially magnetized bearing skeleton (4A) Equipped with the A through-holes (4A1) and B through-holes (4A2) announced according to even circumferential, the A through-holes (4A1) are for filling graphite internal projecting ring A graphite columns (4A1) on (4B), the B through-holes (4A2) are used to install the B graphite columns (4B2) on graphite internal projecting ring (4B)；

The center of graphite internal projecting ring (4B) is equipped with K central through holes (4B-1), and radial punching is placed in K central through holes (4B-1) Magnetic bearing skeleton (4A)；Graphite internal projecting ring (4B) is equipped with the A graphite columns (4B1) being distributed according to even circumferential and B graphite columns (4B2)；The A graphite columns (4B1) are mounted in the A through-holes (4A1) of radially magnetized bearing skeleton (4A)；The B graphite columns (4B2) is mounted in the B through-holes (4A2) of radially magnetized bearing skeleton (4A)；

The center of radially magnetized bearing baffle ring (4C) is equipped with L central through holes (4C-1), radially magnetized bearing baffle ring (4C) Disk is equipped with the D through-holes (4C1) passed through for screw；The disk of radially magnetized bearing baffle ring (4C) is led with B radially magnetized flexibilities The convex round platform (2A5) of magnet ring (2A) is fixed by screw；

The each coil of radial direction magnetic bearing coil group (5) is denoted as A coils (51), B coils (52), C coils (53), D coils (54), E coils (55), F coils (56), G coils (57) and H coils (58)；

A coils (51) are mounted on the A stator tooths (81) of stator core (8)；

B coils (52) are mounted on the B stator tooths (82) of stator core (8)；

C coils (53) are mounted on the C stator tooths (83) of stator core (8)；

D coils (54) are mounted on the D stator tooths (84) of stator core (8)；

E coils (55) are mounted on the E stator tooths (85) of stator core (8)；

F coils (56) are mounted on the F stator tooths (86) of stator core (8)；

G coils (57) are mounted on the G stator tooths (87) of stator core (8)；

H coils (58) are mounted on the H stator tooths (88) of stator core (8)；

The inner ring side of stator core (8) is equipped with stator tooth corresponding with coil number, i.e. A stator tooths according to circumference layout (81), B stator tooths (82), C stator tooths (83), D stator tooths (84), E stator tooths (85), F stator tooths (86), G stator tooths (87) With H stator tooths (88)；Between two stator tooths there are for coil by stator tooth socket.

The present invention is based on the excellent of the orthogonal magnetic circuit journal axle one magnetic suspension bearing of symmetrical self-lubricating flexibility auxiliary bearing structure Point is：

1. the present invention is respectively equipped with axial self-lubricating component in the thrust disc both sides of armature spindle, while in the armature spindle The radial self-lubricating component of left end setting, is arranged self-lubricating component so that orthogonal magnetic-path simultaneously in the both direction of armature spindle Is there is unstability in axis one magnetic suspension bearing, avoids the high thermal phenomenon of dry friction generation, but also rotor kinetic energy The Combination Design of rapid dispersion, both direction self-lubricating component is also the possibility for avoiding complete machine from scrapping in rotor unstability.

2. auxiliary bearing is designed as resilient arm structure by the present invention, the proportioning of the rigidity and damping that make auxiliary bearing tends to close Reason, when unstability occurs, can convert the impact kinetic energy of rotor to the strain energy of elastic arm, eliminate " stuck " phenomenon, stone The application of Mo Huan makes bearing have self-lubricating function, avoids the high thermal phenomenon of dry friction generation, and eliminate that complete machine scraps can Energy.

3. auxiliary bearing and magnetic suspension bearing are combined together by present invention design, keep complete machine structure compacter, reduces Rotor length, improves rotor rigidity mode.With reference to《Vibration mechanics》, author Ni Zhenhua, publishing house of Xi'an Communications University, P371 pages of formula for natural frequencyWherein ω_iFor the i-th rank intrinsic frequency (i=1,2,3 ... n, as i=1 That is the 1st rank intrinsic frequency is rigid mode), E is rotor elasticity modulus, and I is main inertia away from ρ is rotor density, and A cuts for rotor Area, l are rotor length.It can be seen that in the case that rotor material and sectional area are constant, length l is shorter, and rigid mode is higher.

4. the present invention using magnetic suspension bearing part be used as auxiliary bearing, realization compact-sized and magnetic suspension bearing with it is auxiliary It helps bearing integratedization to design and assemble, the concentricity of magnetic center and sectional center can be improved, improve the control of magnetic suspension bearing Precision processed.

5. in order to which the orthogonal magnetic circuit journal axle one magnetic suspension bearing designed with the present invention substitutes " IEEE TRANSACTIONS The right half of Fig. 1 structures disclosed in ON INDUSTRIAL ELECTRONICS ", the present invention is divided into be divided centered on stator core For the auxiliary bearing part on the left side and the auxiliary bearing part on the right, and tiled configuration is different, is replaced and is passed with auxiliary bearing component System ball bearing so that the damping of auxiliary bearing and rigidity realize proportion optimizing design, realize self-lubricating when rotor unstability With the rapid dispersion of rotor kinetic energy.

Description of the drawings

Fig. 1 is the orthogonal magnetic circuit journal axle one magnetic suspension bearing the present invention is based on symmetrical self-lubricating flexibility auxiliary bearing structure External structure.

Figure 1A is the structure chart of the unassembled permanent magnetic circuit components of Fig. 1.

Figure 1B is the sectional structure chart of Fig. 1.

Fig. 1 C are the orthogonal magnetic circuit journal axle one magnetic suspension shafts the present invention is based on symmetrical self-lubricating flexibility auxiliary bearing structure The exploded view held.

Fig. 2 is the structure chart of A axial directions magnetic guiding loop of the present invention.

Fig. 2A is structure chart of the B axle of the present invention to magnetic guiding loop.

Fig. 3 is the structure chart of radially magnetized flexibility magnetic guiding loop of the present invention.

Fig. 3 A are the another side structure charts of radially magnetized flexibility magnetic guiding loop of the present invention.

Fig. 3 B are the front views of radially magnetized flexibility magnetic guiding loop of the present invention.

Fig. 4 is A axial directions auxiliary bearing skeleton of the present invention and the structure chart after the outer bulge loop assembly of A graphite.

Fig. 4 A are A axial directions auxiliary bearing skeleton of the present invention and another viewing angle constructions figure after the outer bulge loop assembly of A graphite.

Fig. 5 is structure chart of the B axle of the present invention to outside auxiliary bearing skeleton and B graphite after bulge loop assembly.

Fig. 5 A are another viewing angle constructions figure of the B axle of the present invention to outside auxiliary bearing skeleton and B graphite after bulge loop assembly.

Fig. 5 B are structure chart of the B axle of the present invention to auxiliary bearing skeleton.

Fig. 5 C are the structure charts after the outer bulge loop assembly of B graphite of the present invention.

Fig. 6 is graphite internal projecting ring of the present invention and the structure chart after radially magnetized bearing Skeleton assembly.

Fig. 6 A are the structure charts of radially magnetized bearing skeleton of the present invention.

Fig. 6 B are the structure charts of graphite internal projecting ring of the present invention.

Fig. 7 is the structure chart of stator core of the present invention and coil assembly.

Fig. 7 A are the structure charts of stator core of the present invention.

Fig. 8 A are the orthogonal magnetic circuit journal axle one magnetic suspension shafts the present invention is based on symmetrical self-lubricating flexibility auxiliary bearing structure The magnetic circuit schematic diagram held.

Fig. 8 B are the orthogonal magnetic circuit journal axle one magnetic suspension shafts the present invention is based on symmetrical self-lubricating flexibility auxiliary bearing structure The magnetic circuit schematic diagram held.

Fig. 9 is the orthogonal magnetic circuit journal axle one magnetic based on symmetrical self-lubricating flexibility auxiliary bearing structure for designing the present invention Suspension bearing is applied to the sectional structure chart in high speed magnetic suspension motor.

Specific implementation mode

Below in conjunction with drawings and examples, the present invention is described in further detail.

Shown in Fig. 1, Figure 1A, Figure 1B, Fig. 1 C, the present invention devises a kind of based on symmetrical self-lubricating flexibility auxiliary bearing The orthogonal magnetic circuit journal axle one magnetic suspension bearing of structure, which is by A axial direction magnetic guiding loops 1A, B axle are to magnetic guiding loop 1D, permanent magnet A 1B, A radially magnetized rigidity magnetic guiding loop 1C, radially magnetized flexibility magnetic guiding loop 2A, B permanent magnet 2B, B radially magnetized rigidity magnetic guiding loop 2C, A axial direction auxiliary bearing skeleton 3A, B axle bulge loop to outside auxiliary bearing skeleton 3C, A graphite The outer bulge loop 3D of 3B, B graphite, radially magnetized bearing skeleton 4A, graphite internal projecting ring 4B, radially magnetized bearing baffle ring 4C, radial magnetic axis Coil group 5, axial magnetic bearing coil 5A and stator core 8 is held to form.

Wherein, A axial directions magnetic guiding loop 1A is identical as the structure of from B axle to magnetic guiding loop 1D；

Wherein, permanent magnet A 1B is identical as the structure of B permanent magnets 2B；

Wherein, A radially magnetizeds rigidity magnetic guiding loop 1C is identical as the structure of B radially magnetized rigidity magnetic guiding loops 2C；

Wherein, A axial directions auxiliary bearing skeleton 3A is identical as the structure of from B axle to auxiliary bearing skeleton 3C；

Wherein, the outer bulge loop 3B of A graphite is identical as the outer structure of bulge loop 3D of B graphite；

In the present invention, A axial directions magnetic guiding loop 1A, B axle are to magnetic guiding loop 1D, permanent magnet A 1B, A radially magnetized rigidity magnetic guiding loop 1C, radially magnetized flexibility magnetic guiding loop 2A, B permanent magnet 2B and B radially magnetized rigidity magnetic guiding loop 2C constitute orthogonal magnetic circuit journal axle one The permanent magnetic circuit component of magnetic suspension bearing.By Fig. 1 it will be clear that the permanent magnetic circuit component is can making for outside For the part of shell.

In the present invention, radially magnetized flexibility magnetic guiding loop 2A, radial auxiliary bearing skeleton 4A, graphite internal projecting ring 4B and diameter To the left redundant bearing assembly for rushing magnetic bearing baffle ring 4C compositions magnetic suspension bearing of the present invention, shown in Figure 1B.Left redundant bearing Component can realize the self-lubricating of auxiliary bearing in armature spindle unstability.But also present invention employs by radial direction magnetic bearing The design method being combined as a whole with auxiliary bearing solves traditional magnetic bearing technical problem low with auxiliary bearing concentricity.

The orthogonal magnetic circuit journal axle one magnetic suspension bearing that the present invention designs is socketed on armature spindle 6 by rotor core 7 It realizes and to be flexibly connected with rotor.The armature spindle 6 can be the output shaft of high speed magnetic suspension motor.

A axial direction magnetic guiding loop 1A and B axle are to magnetic guiding loop 1D

Shown in Fig. 1, Figure 1B, Fig. 1 C, Fig. 2, A axial direction magnetic guiding loops 1A is the integral structure of electrical pure iron machine-shaping Part.The center of A axial direction magnetic guiding loops 1A is equipped with the A central through holes 1A-1 passed through for armature spindle 6；One end of A axial direction magnetic guiding loops 1A Face is smooth panel, is equipped in AA interior annular 1A2, AA cavitys 1A3, AA from the inside to the outside on the other end of A axial direction magnetic guiding loops 1A Dome platform 1A5, AB cavity 1A4, AA outer toroid 1A1, the AB cavitys 1A4 are for placing axial magnetic bearing coil 5A, the AA Cavity 1A3 is used to place the A axial directions auxiliary bearing skeleton 3A and outer bulge loop 3B of A graphite after assembly.

Shown in Fig. 1, Figure 1B, Fig. 1 C, Fig. 2A, B axle to magnetic guiding loop 1D be electrical pure iron machine-shaping integral structure Part.B axle is equipped with the O central through holes 1D-1 passed through for armature spindle 6 to the center of magnetic guiding loop 1D；B axle is to one end of magnetic guiding loop 1D Face is smooth panel, and B axle is equipped in BA interior annular 1D2, BA cavitys 1D3, BA from the inside to the outside on the other end of magnetic guiding loop 1D Dome platform 1D5, BB cavity 1D4, BA outer toroid 1D1, the BB cavitys 1D4 are for placing axial magnetic bearing coil 5A, the BA Cavity 1D3 is used to place the bulge loop 3D to outside auxiliary bearing skeleton 3C and B graphite of the B axle after assembly.

In the present invention the AB cavitys 1A4 of A axial directions magnetic guiding loop 1A and B axle to the BB cavitys 1D4 of magnetic guiding loop 1D after docking It can be formed with the cavity (shown in Figure 1B) for placing axial magnetic bearing coil 5A, and in docking, armature spindle 6 pushes away Power disk 61 be fastened on A axial direction magnetic guiding loops 1A AA convex round platform 1A5 and B axle between the BA convex round platforms 1D5 of magnetic guiding loop 1D , in this way when forming axial magnetic magnetic circuit, armature spindle 6, A axial direction magnetic guiding loop 1A and B axle to magnetic guiding loop 1D be conducting parts.

Radially magnetized flexibility magnetic guiding loop 2A

Shown in Fig. 1, Figure 1B, Fig. 1 C, Fig. 3, Fig. 3 A, Fig. 3 B, radially magnetized flexibility magnetic guiding loop 2A adds for electrical pure iron The molding integral structural member of work.It is logical that radially magnetized flexibility magnetic guiding loop 2A is equipped with outer toroid 2A1, interior annular 2A2, multiple triangles Hole 2A4, triangle through hole 2A4 make the flexible arm 2A3 there are connection between outer toroid 2A1 and interior annular 2A2.Multiple triangles It is separated by flexible arm 2A3 between through-hole 2A4.Since multiple triangle through hole 2A4 that the present invention designs are located in outer toroid Between 2A1 and interior annular 2A2, therefore triangle through hole 2A4 is laid out around the center of circle of radially magnetized flexibility magnetic guiding loop 2A, and three Angular through-hole is being arc close to outer toroid 2A1 on one side.In turn, flexible arm 2A3 is also around radially magnetized flexibility magnetic guiding loop 2A The center of circle layout.

Shown in Fig. 3 A, the center of radially magnetized flexibility magnetic guiding loop 2A is equipped with the D central through holes passed through for armature spindle 6 2A-1；The end face of radially magnetized flexibility magnetic guiding loop 2A is smooth panel, on the other end of radially magnetized flexibility magnetic guiding loop 2A It is equipped with tapped blind hole 2A51, is set between interior dome platform 2A5 and interior annular 2A2 equipped with convex round platform 2A5, convex round platform 2A5 There is interior ring cavity 2A6.Graphite internal projecting ring 4B is installed, radially magnetized bearing baffle ring 4C is fixed by screw in the interior ring cavity 2A6 On the convex round platform 2A5 of radially magnetized flexibility magnetic guiding loop 2A.

Shown in Fig. 3 B, for the flexibility for making the radially magnetized flexibility magnetic guiding loop 2A of the invention designed have in use It resets, then single flexible arm need to meet the design requirement of arc angle β (unit rad) and axial width a (unit mm).By diameter It is denoted as r (unit mm) to the radius of flexible magnetic guiding loop, the axial width of radial compliance magnetic guiding loop is denoted as D (unit mm), then flexible The configuration design of magnetic guiding loop meets K is strain coefficient, and m is to turn The quality of son, unit K g, u are the rotating speed of rotor, and unit rpm, E are elasticity modulus, and units MPa, σ is strain, dimensionless.

In the present invention, radially magnetized flexibility magnetic guiding loop 2A is designed between outer toroid 2A1 and interior annular 2A2 multiple Flexible flexible arm 2A3 can solve auxiliary bearing when unstability situation occurs in armature spindle 6 by part deformation " stuck " phenomenon.

Permanent magnet A 1B and B permanent magnets 2B

Shown in Fig. 1, Figure 1B, Fig. 1 C, permanent magnet A 1B is neodymium iron boron or the integral structure annulus of SmCo casting and forming Part.The center of permanent magnet A 1B is equipped with the B central through holes 1B-1 passed through for armature spindle 6.

Shown in Fig. 1, Figure 1B, Fig. 1 C, B permanent magnets 2B is neodymium iron boron or the integral structure annulus of SmCo casting and forming Part.The center of B permanent magnets 2B is equipped with the E central through holes 2B-1 passed through for armature spindle 6.

A radially magnetizeds rigidity magnetic guiding loop 1C and B radially magnetized rigidity magnetic guiding loops 2C

Shown in Fig. 1, Figure 1B, Fig. 1 C, A radial rigidity magnetic guiding loops 1C is electrical pure iron (or other high magnetic permeability metals) The integral structure annulus part of machine-shaping.It is led equipped with C central through holes 1C-1, A radial rigidity at the center of A radial rigidity magnetic guiding loops 1C A inner baffle rings 1C1 is equipped on the inside of the ring body of magnet ring 1C.

Shown in Fig. 1, Figure 1B, Fig. 1 C, B radial rigidity magnetic guiding loops 2C is electrical pure iron (or other high magnetic permeability metals) The integral structure annulus part of machine-shaping.It is led equipped with F central through holes 2C-1, B radial rigidity at the center of B radial rigidity magnetic guiding loops 2C B inner baffle rings 2C1 is equipped on the inside of the ring body of magnet ring 2C.

In the present invention, the B inner baffle rings of A inner baffle rings 1C1 and B radial rigidity the magnetic guiding loop 2C of A radial rigidities magnetic guiding loop 1C Outer disc 8A (as shown in Figure 1B) between 2C1 for placing magnetic bearing stator core 8.

In the present invention, A radial rigidity magnetic guiding loop 1C and B radial rigidities are installed to lead on the outer disc 8A of stator core 8 Magnet ring 2C, and there are the gaps A 9 between A radial rigidity magnetic guiding loop 1C and B radial rigidity magnetic guiding loops 2C；It is rigid using two radial directions Property magnetic guiding loop (1C, 2C) along the shaft orientation layout of armature spindle, and have certain interval, permanent magnetic circuit can be prevented short-circuit.

A axial directions auxiliary bearing skeleton 3A and B axle are to auxiliary bearing skeleton 3C

Shown in Fig. 1, Figure 1B, Fig. 1 C, Fig. 4, Fig. 4 A, A axial direction auxiliary bearing skeletons 3A is 40Cr or 40CrNiMo materials Expect the annulus part of processing.The center of A axial direction auxiliary bearing skeletons 3A is equipped with G central through holes 3A-1.A axial direction auxiliary bearing skeletons The end face of 3A is smooth panel, and the other end of A axial direction auxiliary bearing skeletons 3A is equipped with AA round platform 3A3 and AB round platforms 3A4；Institute It states and is distributed with multiple AA through-holes 3A1 passed through for AA graphite columns 3B1 by even circumferential on AA round platforms 3A3；The AB round platforms 3A4 On by even circumferential be distributed with multiple AB through-holes 3A2 passed through for AB graphite columns 3B2.

Shown in Fig. 1, Figure 1B, Fig. 1 C, Fig. 5, Fig. 5 A, Fig. 5 B, Fig. 5 C, B axle to auxiliary bearing skeleton 3C be 40Cr or The annulus part of 40CrNiMo materials processing.B axle is equipped with I central through holes 3C-1 to the center of auxiliary bearing skeleton 3C.B axle is to auxiliary The end face of bearing skeleton 3C is smooth panel, and B axle is equipped with BA round platforms 3C3 and BB circle to the other end of auxiliary bearing skeleton 3C Platform 3C4；On the BA round platforms 3C3 multiple BA through-holes 3C1 passed through for BA graphite columns 3D1 are distributed with by even circumferential；It is described On BB round platforms 3C4 multiple BB through-holes 3C2 passed through for BB graphite columns 3D2 are distributed with by even circumferential.

In the present invention, it is arranged what two row circumferencial directions were arranged in the axial direction of axial auxiliary bearing skeleton (3A, 3C) For the through-hole of the graphite column installation of axial direction, graphite column is placed in through-holes, in the magnetic suspension bearing work of the present invention, Making armature spindle, there are one self-lubricating effects in the axial direction, solve the stuck phenomenon of bearing and armature spindle.

The outer bulge loop 3B of the A graphite and outer bulge loop 3D of B graphite

Shown in Figure 1A, Figure 1B, Fig. 1 C, Fig. 4, Fig. 4 A, the outer bulge loop 3B of A graphite is the molding integrated annulus of machining graphite Structural member.The center of the outer bulge loop 3B of A graphite is passed through equipped with H central through holes 3B-1, H central through hole 3B-1 for armature spindle.A graphite The end face of outer bulge loop 3B is smooth panel, and the other end of the outer bulge loop 3B of A graphite is equipped with the AA graphite columns by circle distribution 3B1 and AB graphite columns 3B2.The AA of AA graphite columns 3B1 round platform 3A3 in the AA of A axial direction auxiliary bearing skeletons 3A is logical In the 3A1 of hole；The AB graphite columns 3B2 is in the AB through-holes 3A2 of the outer round platform 3A4 of AB of A axial direction auxiliary bearing skeletons 3A. In the present invention, each graphite column corresponds to the through-hole on axial auxiliary bearing skeleton, the outer bulge loop of graphite and bearing skeleton respectively The self-lubricating of auxiliary bearing is realized in cooperation.

Shown in Figure 1A, Figure 1B, Fig. 1 C, Fig. 5, Fig. 5 A, Fig. 5 B, Fig. 5 C, the outer bulge loop 3D of B graphite be machining graphite at The integrated circular ring structure part of type.The center of the outer bulge loop 3D of B graphite is equipped with P central through holes 3D-1, P central through hole 3D-1 for turning Sub- axis passes through.The end face of the outer bulge loop 3D of B graphite is smooth panel, and the other end of the outer bulge loop 3D of B graphite is equipped with by circumference point The BA graphite column 3D1 and BB graphite columns 3D2 of cloth.The BA graphite columns 3D1 is mounted on BA inner circle of the B axle to auxiliary bearing skeleton 3C In the BA through-holes 3C1 of platform 3C3；The BB graphite columns 3C2 is mounted on B axle round platform 3C4 to outside the BB of auxiliary bearing skeleton 3C In BB through-holes 3C2.In the present invention, each graphite column corresponds to the through-hole on axial auxiliary bearing skeleton, the outer bulge loop of graphite respectively The self-lubricating of auxiliary bearing is realized with the cooperation of bearing skeleton.

Radially magnetized bearing skeleton 4A

Shown in Fig. 1, Figure 1B, Fig. 1 C, Fig. 6, Fig. 6 A, radially magnetized bearing skeleton 4A is 40Cr or 40CrNiMo materials Expect the annulus part of processing.The center of radially magnetized bearing skeleton 4A is equipped with J central through holes 4A-1.Radially magnetized bearing skeleton 4A A through-hole 4A1 and the B through-holes 4A2, the A through-holes 4A1 that are announced according to even circumferential are equipped with for filling on graphite internal projecting ring 4B A graphite columns 4A1, the B through-holes 4A2 are for installing the B graphite columns 4B2 on graphite internal projecting ring 4B.In the present invention, in radial punching The through-hole for the graphite column installation for axial direction that two row circumferencial directions are arranged is arranged in the axial direction of magnetic bearing skeleton 4A, reaches To the self-lubricating effect of radial direction upper bearing (metal).

Graphite internal projecting ring 4B

Shown in Figure 1A, Figure 1B, Fig. 1 C, Fig. 6, Fig. 6 B, graphite internal projecting ring 4B is the molding integrated annulus of machining graphite Structural member.The center of graphite internal projecting ring 4B is equipped in K central through holes 4B-1, K central through hole 4B-1 and is placed with radially magnetized bearing Skeleton 4A.Graphite internal projecting ring 4B is equipped with the A graphite column 4B1 and B graphite columns 4B2 being distributed according to even circumferential.The A graphite columns 4B 1 is in the A through-holes 4A1 of radially magnetized bearing skeleton 4A.The B graphite columns 4B2 is mounted on radially magnetized bearing skeleton In the B through-holes 4A2 of 4A.In the present invention, each graphite column realizes auxiliary with the through-hole cooperation on radially magnetized bearing skeleton 4A The self-lubricating of bearing.

Radially magnetized bearing baffle ring 4C

Shown in Figure 1A, Figure 1B, Fig. 1 C, radially magnetized bearing baffle ring 4C is the integrated annulus of electrical pure iron machine-shaping Structural member.The center of radially magnetized bearing baffle ring 4C is equipped with L central through hole 4C-1, is set on the disk of radially magnetized bearing baffle ring 4C There is the D through-holes 4C1 passed through for screw.The convex of the disk and B radially magnetized flexibility magnetic guiding loops 2A of radially magnetized bearing baffle ring 4C Round platform 2A5 is fixed by screw.

Radial direction magnetic bearing coil group 5

Shown in Figure 1A, Figure 1B, Fig. 1 C, Fig. 5, Fig. 7 A, radial direction magnetic bearing coil group 5 is the pairs of coil of fine copper coiling It constitutes, generally four pairs of coils (totally 8 coils, two neighboring is one group) form a magnetic bearing coil group 5.Each coil It (is adjusted according to rotor speed and output power of motor) for 90~120 circles, line footpath 0.5mm, orthogonal magnetic circuit axial magnetic The power of bearing is 60W~80W (being adjusted according to rotor speed and output power of motor).Each coil is mounted on stator iron On the stator tooth of core 8.

In the present invention, shown in Figure 5 in order to clearly demonstrate the layout of 8 coils, form radial direction magnetic bearing coil Each coil of group 5 is denoted as A coils 51, B coils 52, C coils 53, D coils 54, E coils 55, F coils 56, G coils 57 and H Coil 58.

A coils 51 are mounted on the A stator tooths 81 of stator core 8；

B coils 52 are mounted on the B stator tooths 82 of stator core 8；

C coils 53 are mounted on the C stator tooths 83 of stator core 8；

D coils 54 are mounted on the D stator tooths 84 of stator core 8；

E coils 55 are mounted on the E stator tooths 85 of stator core 8；

F coils 56 are mounted on the F stator tooths 86 of stator core 8；

G coils 57 are mounted on the G stator tooths 87 of stator core 8；

H coils 58 are mounted on the H stator tooths 88 of stator core 8.

Axial magnetic bearing coil 5A

Shown in Figure 1A, Figure 1B, Fig. 1 C, axial magnetic bearing coil 5A is fine copper coiling.General coil is 90~300 Circle (is adjusted) according to rotor speed and output power of motor, line footpath 0.5mm.In the present invention, axial magnetic bearing coil 5A The electromagnetic field that can be generated is adjusted according to rotor speed and output power of motor.

Stator core 8

Shown in Figure 1A, Figure 1B, Fig. 1 C, Fig. 7, Fig. 7 A, stator core 8 is that (thickness can be multilayer silicon steel sheet 0.2mm, 0.35mm and 0.5mm) the molding integrated circular ring structure part of superposition.The center of magnetic bearing stator core 8 is logical equipped with the centers N Hole 8-1, N central through hole 8-1 for placing rotor core 7, rotor core 7 be multilayer silicon steel sheet (thickness can be 0.2mm, 0.35mm and 0.5mm) the molding integrated circular ring structure part of superposition.The center of rotor core 7 is equipped with M central through hole 7-1, passes through M Rotor core 7 is mounted on armature spindle 6 by central through hole 7-1.Stator core 8 is equipped with the stator for installing each coil Tooth, and stator tooth is circumference uniform distribution, between each two stator tooth there are for coil by stator tooth socket.

In the present invention, referring to shown in Fig. 7, Fig. 7 A stator core 8 is separately mounted in order to clearly demonstrate 8 coils On respective stator tooth, then the inner ring side of stator core 8 is equipped with 8 stator tooths corresponding with coil number according to circumference layout, i.e., A stator tooths 81, B stator tooths 82, C stator tooths 83, D stator tooths 84, E stator tooths 85, F stator tooths 86, G stator tooths 87 and H stators Tooth 88.Between two stator tooths there are for coil by stator tooth socket.

In the present invention, A radial rigidity magnetic guiding loop 1C and B radial rigidities are installed to lead on the outer disc 8A of stator core 8 Magnet ring 2C, and there are the gaps A 9 between A radial rigidity magnetic guiding loop 1C and B radial rigidity magnetic guiding loops 2C；It is rigid using two radial directions Property magnetic guiding loop (1C, 2C) along the shaft orientation layout of armature spindle, and have certain interval, permanent magnetic circuit can be prevented short-circuit.Stator iron The inner ring side of core 8 is equipped with 8 stator tooths corresponding with coil number according to circumference layout, and rotor iron is installed on the inside of stator tooth Core 7.

The present invention uses is divided into left redundant bearing portions and right journal axle shaft centered on stator core 8 in the axial direction Bearing portion point；In left redundant bearing portions and the design method that radial direction magnetic bearing and auxiliary bearing are combined as a whole is used, solution It has determined traditional magnetic bearing technical problem low with auxiliary bearing concentricity.

The assembly for the orthogonal magnetic circuit journal axle one magnetic suspension bearing that the present invention designs：

(A) 8 coils are socketed in respectively on 8 stator tooths of stator core 8；

(B) all graphite columns outside A graphite on bulge loop 3B are each passed through respective logical on A axial direction auxiliary bearing skeletons 3A Hole, and make the outer bulge loop 3B of A graphite with after the 3A cooperations of A axial direction auxiliary bearing skeletons, it is placed in the AA cavitys of A axial direction magnetic guiding loops 1A In 1A3；

(C) that all graphite columns outside B graphite on bulge loop 3D are each passed through B axle is respective logical on auxiliary bearing skeleton 3C Hole, and make the outer bulge loop 3D of B graphite and B axle to after the 3C cooperations of auxiliary bearing skeleton, it is placed in BA cavity of the B axle to magnetic guiding loop 1D In 1D3；

(D) all graphite columns on graphite internal projecting ring 4B are each passed through respective logical on radial auxiliary bearing skeleton 4A Hole, and make graphite internal projecting ring 4B with after radial auxiliary bearing skeleton 4A cooperations, it is placed in the BA inner ring of radial compliance magnetic guiding loop 2A In chamber 2A6, then journal bearing baffle ring 4C is fixed on the BA convex round platforms 2A5 of radial compliance magnetic guiding loop 2A with screw, is led to It crosses and realizes the movements of journal bearing baffle ring 4C limitation graphite internal projecting ring 4B in the axial direction with radial auxiliary bearing skeleton 4A；Diameter To there are portable protective gaps, which is the half of magnetic gap between auxiliary bearing skeleton 4A and armature spindle 6, usually 0.2mm~ 0.3mm；

(E) the end face both ends of the outer disc 8C of magnetic bearing stator core 8 install respectively A radial rigidity magnetic guiding loop 1C and B radial rigidity magnetic guiding loop 2C, and there are the gaps A 9 between A radial rigidity magnetic guiding loop 1C and B radial rigidity magnetic guiding loops 2C；

(F) in the right end of A radial rigidity magnetic guiding loops 1C and B axle to being equipped with A permanent magnets 1B between magnetic guiding loop 1D left ends； B permanent magnets 2B is installed between the left end and radial compliance magnetic guiding loop 2A left ends of B radial rigidity magnetic guiding loops 2C；

(G) axial coil 5A is positioned over B axle into the BB cavitys 1D4 of magnetic guiding loop 1D；

(H) rotor core 7 is socketed on armature spindle 6；

(I) armature spindle 6 for being socketed rotor core 7 is each passed through the parts radial direction auxiliary bearing that above-mentioned assembly is completed The I of the J central through holes 4A-1 of skeleton 4A, the N central through holes 8-1 of magnetic bearing stator core 8 and B axle to auxiliary bearing skeleton 3C Central through hole 3C-1 makes the thrust disc 61 on armature spindle 6 be in contact to the BA dome platforms 1D5 of magnetic guiding loop 1D with B axle；

(J) AA of the A axial direction magnetic guiding loops 1A of bulge loop 3B outside A axial direction auxiliary bearing skeleton 3A and A graphite will be assembled with Outer toroid 1A1 and B axle are to the joints BA outer toroid 1D1 of magnetic guiding loop 1D；

(K) when radial direction magnetic bearing coil group 5 is powered, be socketed rotor core 7 armature spindle 6 can be suspended in it is radial auxiliary Help the J central through holes 4A-1 of bearing skeleton 4A, the N central through holes 8-1 of magnetic bearing stator core 8, B axle to auxiliary bearing skeleton 3C The G central through holes 4A-1 of I central through hole 3C-1, A axial direction auxiliary bearing skeletons 3A be formed by space.

(L) when axial coil 5A is powered, B axle can be suspended in by being socketed the thrust disc 61 of the armature spindle 6 of rotor core 7 In the space surrounded to the AA convex round platforms 1A5 of the BA convex round platform 1D5 and A axial direction magnetic guiding loops 1A of magnetic guiding loop 1D.

Shown in Fig. 8 A, Fig. 8 B, the orthogonal magnetic based on symmetrical self-lubricating flexibility auxiliary bearing structure that the present invention designs The magnetic circuit of approach axes one magnetic suspension bearing is：

The permanent magnetic that permanent magnet generates can provide permanent magnet bias magnetic field to magnetic suspension bearing, undertake big suffered by magnetic bearing Partially radially power and axial force.The electromagnetic force that magnet exciting coil generates can be provided by being superimposed with permanent magnetic to magnetic suspension bearing It is accurately controlled power.Since most of radial and axial load is undertaken by permanent magnetic, so electromagnetic force only needs to export fraction Power bears radial and axial load, is advantageously implemented accurately controlling for electromagnetic force in this way, is more advantageous to and magnetic bearing is kept to turn surely Sub- air gap is uniform, realizes the contactless suspension bearing of rotor.

Fig. 8 A show three magnetic circuits, respectively left side permanent magnetic circuit, right side permanent magnetic circuit and axial magnetic magnetic circuit.

The trend of left side permanent magnetic circuit：Magnetic flux passes through radial compliance magnetic guiding loop respectively from the poles N of B permanent magnets 2B 2A, radial auxiliary bearing skeleton 4A, armature spindle 6, rotor core 7, magnetic bearing stator core 8, B radial rigidity magnetic guiding loops 2C are returned to The poles S of B permanent magnets 2B.

The trend of right side permanent magnetic circuit：Magnetic flux from the poles N of permanent magnet A 1B, by B axle to magnetic guiding loop 1D when Time is divided into two branches, and a branch passes through downwards B axle and reaches thrust disc 61 to magnetic guiding loop 1D, and another branch passes through to the right A Axial magnetic guiding loop 1A reaches thrust disc 61, and one magnetic circuit of stroke again after two branches converge at thrust disc 61, the magnetic circuit is again Pass through the poles S that armature spindle 6, rotor core 7, stator core 8, A radial rigidity magnetic guiding loops 1C return to permanent magnet A 1B respectively.

The trend of axial magnetic magnetic circuit："●" shown in axial magnetic coil 5A indicates that current direction is vertical and flows out in Fig. 8 B Paper, "×" indicate that current direction is vertical and flows into paper, and current direction meets right-hand screw rule with flow direction.Axial magnetic Coil 5A is moved towards to be powered by illustrating current, then magnetic flux passes through A axial direction magnetic guiding loops 1A, thrust respectively from B axle to magnetic guiding loop 1D Disk 61 returns to B axle to magnetic guiding loop 1D, forms a closed magnetic loop.

Fig. 8 B show radial electromagnetic circuit, stator tooth 81, stator tooth 82, stator tooth 83, the stator tooth of stator core 8 84, stator tooth 85, stator tooth 86, stator tooth 87, stator tooth 88.Radial direction magnetic bearing coil group 5 includes 8 coils, respectively： Coil 51, coil 52, coil 53, coil 54, coil 55, coil 56, coil 57, coil 58.Each stator tooth is cased with accordingly Coil, dot shown in each coil in figure ● indicate that the vertical cocurrent of current direction goes out paper, small fork × expression current direction Vertically and paper is flowed into, current direction meets right-hand screw rule with flow direction, then has：

The trend of upper right corner electromagnetic circuit is：Coil 51 and coil 52 are moved towards to be powered by illustrating current, then magnetic flux is from stator Tooth 8A1 sets out, and returns to stator by the top-right part of the top-right part of outer disc C, stator tooth 8A2, rotor core 7 respectively Tooth 8A1 forms the electromagnetic circuit in the upper right corner；

The trend of lower right corner electromagnetic circuit is：Coil 53 and coil 54 are moved towards to be powered by illustrating current, then magnetic flux is from stator Tooth 8A3 sets out, and returns to stator by the lower right corner part of the lower right corner part of outer disc C, stator tooth 8A4, rotor core 7 respectively Tooth 8A3 forms the electromagnetic circuit in the lower right corner；

The trend of lower left corner electromagnetic circuit is：Coil 55 and coil 56 are moved towards to be powered by illustrating current, then magnetic flux is from stator Tooth 8A5 sets out, and returns to stator by the lower left corner part of the lower left corner part of outer disc C, stator tooth 8A6, rotor core 7 respectively Tooth 8A5 forms the electromagnetic circuit in the lower left corner；

The trend of upper left corner electromagnetic circuit is：Coil 57 and coil 58 are moved towards to be powered by illustrating current, then magnetic flux is from stator Tooth 8A7 sets out, and returns to stator by the upper left hand corner section of the upper left hand corner section of outer disc C, stator tooth 8A8, rotor core 7 respectively Tooth 8A7 forms the electromagnetic circuit in the upper left corner.

By Fig. 8 A and Fig. 8 B as it can be seen that plane where permanent magnetic circuit and axial magnetic magnetic circuit is parallel with rotor axis, radial electricity Plane where magnetic magnetic circuit is vertical with rotor axis, and such magnetic circuit spatially forms orthohormbic structure, does not interfere with each other, and individually makees With.

The present invention is on the basis of existing inner rotor radial pure electromagnetism magnetic bearing, by two permanent magnetic circuits and diameter axial magnetic Magnetic circuit combines, and the permanent magnet bias magnetic flux of bigger is provided for rotor.The permanent magnet bias magnetic flux and axial magnetic magnetic flux and radial electromagnetism Magnetic flux is arranged for orthogonal space, and using auxiliary bearing as a part for permanent magnetic circuit, magnetic bearing overall structure is made not account for It is achieved that the promotion of suspension effect with more volumes, and then improves the operational effect of magnetic suspension high speed motor.

Embodiment 1

Orthogonal magnetic-path shown in Figure 9, that the present invention is designed based on symmetrical self-lubricating flexibility auxiliary bearing structure Axis one magnetic suspension bearing, which is applied in high speed magnetic suspension motor, carries out performance specification.

The orthogonal magnetic circuit journal axle one magnetic suspension based on symmetrical self-lubricating flexibility auxiliary bearing structure that the present invention is designed Bearing is applied in high speed magnetic suspension motor, i.e., armature spindle 6 is replaced with motor output shaft, will be assembled by rotor core 7 The good orthogonal magnetic circuit journal axle one magnetic suspension bearing of the present invention is mounted on motor output shaft, and in the thrust disc of armature spindle 6 61 One displacement sensor 20 is installed between the left side and stator core 8, high speed is installed in the left end of radially magnetized flexibility magnetic guiding loop 2A The stator 30 of magnetic suspension motor.By comparison to conventional high rate magnetic suspension motor bearing (i.e. Fig. 1 of background technology reference), The orthogonal magnetic circuit journal axle one magnetic suspension bearing of the present invention improves the control accuracy of magnetic bearing, improves the anti-mistake of magnetic suspension motor The auxiliary bearing (Backup bearing) that tradition is applied in magnetic suspension motor is substituted with the magnetic bearing of the present invention in steady ability With journal axle one magnetic bearing (3-DOF MB) structure, the overall structure of magnetic suspension high speed motor can be made compacter, carried simultaneously The high concentricity of magnetic suspension bearing and auxiliary bearing, and then improve the control of the accuracy of detection and control system of displacement sensor Precision processed.

The present invention is a kind of orthogonal magnetic circuit journal axle one magnetic suspension shaft based on symmetrical self-lubricating flexibility auxiliary bearing structure It holds, is to use journal axle one magnetic bearing and auxiliary bearing being integrated as integrated technological means, utilizes radial direction and axial magnetic Road orthogonal space distribution mode solves traditional magnetic bearing technical problem low with auxiliary bearing concentricity, has reached same Can be exported under magnetic bearing volume the suspending power of bigger, the rational proportion of auxiliary bearing rigidity and damping, mechanical coaxial degree it is high and The high technique effect of control accuracy.In being applied to high speed magnetic suspension motor, the anti-unstability energy of high speed magnetic suspension motor is improved The rigid mode of power and rotor, and improve control accuracy of the control system to magnetic suspension bearing.

Claims

1. a kind of orthogonal magnetic circuit journal axle one magnetic suspension bearing based on symmetrical self-lubricating flexibility auxiliary bearing structure, feature exist In：The orthogonal magnetic circuit journal axle one magnetic suspension bearing is from A axial directions magnetic guiding loop (1A), B axle to magnetic guiding loop (1D), permanent magnet A (1B), A radially magnetized rigidity magnetic guiding loops (1C), radially magnetized flexibility magnetic guiding loop (2A), B permanent magnets (2B), B radially magnetized rigidity Magnetic guiding loop (2C), A axial direction auxiliary bearing skeletons (3A), B axle bulge loop (3B), B graphite to outside auxiliary bearing skeleton (3C), A graphite Outer bulge loop (3D), radially magnetized bearing skeleton (4A), graphite internal projecting ring (4B), radially magnetized bearing baffle ring (4C), radial magnetic axis Hold coil group (5), axial magnetic bearing coil (5A) and stator core (8) composition；

The center of A axial directions magnetic guiding loop (1A) is equipped with the A central through holes (1A-1) passed through for armature spindle (6)；A axial direction magnetic guiding loops The end face of (1A) is smooth panel, be equipped with from the inside to the outside on the other end of A axial directions magnetic guiding loop (1A) AA interior annulars (1A2), AA cavitys (1A3), AA convexes round platform (1A5), AB cavitys (1A4), AA outer toroids (1A1), the AB cavitys (1A4) are for placing Axial magnetic bearing coil (5A), the AA cavitys (1A3) are used to place A axial direction auxiliary bearing skeletons (3A) and A stones after assembly The outer bulge loop (3B) of ink；

B axle is equipped with the O central through holes (1D-1) passed through for armature spindle (6) to the center of magnetic guiding loop (1D)；B axle is to magnetic guiding loop The end face of (1D) be smooth panel, B axle on the other end of magnetic guiding loop (1D) from the inside to the outside be equipped with BA interior annulars (1D2), BA cavitys (1D3), BA convexes round platform (1D5), BB cavitys (1D4), BA outer toroids (1D1), the BB cavitys (1D4) are for placing Axial magnetic bearing coil (5A), the BA cavitys (1D3) are used to place the B axle after assembly to auxiliary bearing skeleton (3C) and B stones The outer bulge loop (3D) of ink；

The thrust disc (61) of armature spindle (6) is to be fastened on the AA convexes round platform (1A5) of A axial directions magnetic guiding loop (1A) and B axle to magnetic conduction Between the BA convexes round platform (1D5) of ring (1D)；

Radially magnetized flexibility magnetic guiding loop (2A) is equipped with outer toroid (2A1), interior annular (2A2), multiple triangle through hole (2A4), Triangle through hole (2A4) makes between outer toroid (2A1) and interior annular (2A2) that there are the flexible arm connecting (2A3)；Multiple triangles It is separated by flexible arm (2A3) between shape through-hole (2A4)；

The center of radially magnetized flexibility magnetic guiding loop (2A) is equipped with the D central through holes (2A-1) passed through for armature spindle (6)；Radial punching The end face of magnetic flexibility magnetic guiding loop (2A) is smooth panel, and the other end of radially magnetized flexibility magnetic guiding loop (2A) is equipped with convex Round platform (2A5), convex round platform (2A5) is equipped with tapped blind hole (2A51), between interior dome platform (2A5) and interior annular (2A2) Equipped with interior ring cavity (2A6)；Graphite internal projecting ring (4B) is installed, radially magnetized bearing baffle ring (4C) is logical in the interior ring cavity (2A6) Screw is crossed to be fixed on the convex round platform (2A5) of radially magnetized flexibility magnetic guiding loop (2A)；

The center of A radial rigidities magnetic guiding loop (1C) is equipped with C central through holes (1C-1), in the ring body of A radial rigidities magnetic guiding loop (1C) Side is equipped with A inner baffle rings (1C1)；

The center of B radial rigidities magnetic guiding loop (2C) is equipped with F central through holes (2C-1), in the ring body of B radial rigidities magnetic guiding loop (2C) Side is equipped with B inner baffle rings (2C1)；

Between the A inner baffle rings (1C1) of A radial rigidities magnetic guiding loop (1C) and the B inner baffle rings (2C1) of B radial rigidities magnetic guiding loop (2C) Outer disc (8A) for placing stator core (8)；And A radial rigidities magnetic guiding loop (1C) and B radial rigidities magnetic guiding loop (2C) it Between there are the gaps A (9)；

The center of A axial direction auxiliary bearing skeletons (3A) is equipped with G central through holes (3A-1)；The one of A axial direction auxiliary bearing skeletons (3A) End face is smooth panel, and the other end of A axial direction auxiliary bearing skeletons (3A) is equipped with AA round platforms (3A3) and AB round platforms (3A4)；Institute It states and is distributed with multiple AA through-holes (3A1) passed through for AA graphite columns (3B1) by even circumferential on AA round platforms (3A3)；The AB On round platform (3A4) multiple AB through-holes (3A2) passed through for AB graphite columns (3B2) are distributed with by even circumferential；

B axle is equipped with I central through holes (3C-1) to the center of auxiliary bearing skeleton (3C)；B axle to auxiliary bearing skeleton (3C) one End face is smooth panel, and B axle is equipped with BA round platforms (3C3) and BB round platforms (3C4) to the other end of auxiliary bearing skeleton (3C)；Institute It states and is distributed with multiple BA through-holes (3C1) passed through for BA graphite columns (3D1) by even circumferential on BA round platforms (3C3)；The BB On round platform (3C4) multiple BB through-holes (3C2) passed through for BB graphite columns (3D2) are distributed with by even circumferential；

The center of the outer bulge loop (3B) of A graphite is equipped with H central through holes (3B-1), and H central through holes (3B-1) are worn for armature spindle (6) It crosses；The end face of the outer bulge loop (3B) of A graphite is smooth panel, and the other end of the outer bulge loop (3B) of A graphite, which is equipped with, presses circle distribution AA graphite columns (3B1) and AB graphite columns (3B2)；The AA graphite columns (3B1) are mounted on A axial direction auxiliary bearing skeletons (3A) In AA in the AA through-holes (3A1) of round platform (3A3)；The AB graphite columns (3B2) are mounted on the AB of A axial direction auxiliary bearing skeletons (3A) In the AB through-holes (3A2) of outer round platform (3A4)；

The center of the outer bulge loop (3D) of B graphite is equipped with P central through holes (3D-1), and P central through holes (3D-1) are worn for armature spindle (6) It crosses；The end face of the outer bulge loop (3D) of B graphite is smooth panel, and the other end of the outer bulge loop (3D) of B graphite, which is equipped with, presses circle distribution BA graphite columns (3D1) and BB graphite columns (3D2)；The BA graphite columns (3D1) are mounted on B axle to auxiliary bearing skeleton (3C) In BA in the BA through-holes (3C1) of round platform (3C3)；The BB graphite columns (3C2) are mounted on BB of the B axle to auxiliary bearing skeleton (3C) In the BB through-holes (3C2) of outer round platform (3C4)；

The center of radially magnetized bearing skeleton (4A) is equipped with J central through holes (4A-1)；Radially magnetized bearing skeleton (4A) is equipped with The A through-holes (4A1) and B through-holes (4A2) announced according to even circumferential, the A through-holes (4A1) are for filling graphite internal projecting ring (4B) A graphite columns (4A1), the B through-holes (4A2) are used to install B graphite columns (4B2) on graphite internal projecting ring (4B)；

The center of graphite internal projecting ring (4B) is equipped with K central through holes (4B-1), and radially magnetized axis is placed in K central through holes (4B-1) Hold skeleton (4A)；Graphite internal projecting ring (4B) is equipped with the A graphite columns (4B1) being distributed according to even circumferential and B graphite columns (4B2)； The A graphite columns (4B1) are mounted in the A through-holes (4A1) of radially magnetized bearing skeleton (4A)；B graphite columns (4B2) installation In the B through-holes (4A2) of radially magnetized bearing skeleton (4A)；

The center of radially magnetized bearing baffle ring (4C) is equipped with L central through holes (4C-1), the disk of radially magnetized bearing baffle ring (4C) It is equipped with the D through-holes (4C1) passed through for screw；The disk of radially magnetized bearing baffle ring (4C) and B radially magnetized flexibility magnetic guiding loops The convex round platform (2A5) of (2A) is fixed by screw；

The each coil of radial direction magnetic bearing coil group (5) is denoted as A coils (51), B coils (52), C coils (53), D coils (54), E Coil (55), F coils (56), G coils (57) and H coils (58)；

A coils (51) are mounted on the A stator tooths (81) of stator core (8)；

B coils (52) are mounted on the B stator tooths (82) of stator core (8)；

C coils (53) are mounted on the C stator tooths (83) of stator core (8)；

D coils (54) are mounted on the D stator tooths (84) of stator core (8)；

E coils (55) are mounted on the E stator tooths (85) of stator core (8)；

F coils (56) are mounted on the F stator tooths (86) of stator core (8)；

G coils (57) are mounted on the G stator tooths (87) of stator core (8)；

H coils (58) are mounted on the H stator tooths (88) of stator core (8)；

The inner ring side of stator core (8) is equipped with stator tooth corresponding with coil number, i.e. A stator tooths (81), B according to circumference layout Stator tooth (82), C stator tooths (83), D stator tooths (84), E stator tooths (85), F stator tooths (86), G stator tooths (87) and H stators Tooth (88)；Between two stator tooths there are for coil by stator tooth socket.

2. the orthogonal magnetic circuit journal axle one magnetcisuspension according to claim 1 based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held, it is characterised in that：Radial compliance magnetic guiding loop can complete flexible reset, then the configuration design of radial compliance magnetic guiding loop is full Footβ is the arc angle of single flexible arm, and a is the axial width of radial compliance magnetic guiding loop, and D is radial The axial width of flexible magnetic guiding loop, K are strain coefficient, and m is the quality of rotor, and r is the radius of radial compliance magnetic guiding loop, and u is The rotating speed of rotor, E are elasticity modulus, and σ is strain.

3. the orthogonal magnetic circuit journal axle one magnetcisuspension according to claim 1 based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held, it is characterised in that：The magnetic circuit of magnetic suspension bearing is axial orthogonal with radial direction.

4. the orthogonal magnetic circuit journal axle one magnetcisuspension according to claim 1 based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held, it is characterised in that：Magnetic circuit moves towards：

The trend of left side permanent magnetic circuit：Magnetic flux passes through radial compliance magnetic guiding loop respectively from the poles N of B permanent magnets (2B) (2A), radial auxiliary bearing skeleton (4A), armature spindle (6), rotor core (7), magnetic bearing stator core (8), B radial rigidities are led Magnet ring (2C) returns to the poles S of B permanent magnets (2B)；

The trend of right side permanent magnetic circuit：Magnetic flux from the poles N of permanent magnet A (1B), by B axle to magnetic guiding loop (1D) when Time is divided into two branches, and a branch passes through downwards B axle and reaches thrust disc (61) to magnetic guiding loop (1D), and another branch passes through to the right It crosses A axial directions magnetic guiding loop (1A) and reaches thrust disc (61), one magnetic circuit of stroke again after two branches converge at thrust disc (61), The magnetic circuit passes through armature spindle (6), rotor core (7), stator core (8), A radial rigidities magnetic guiding loop (1C) and returns to A forever respectively again The poles S of magnet (1B)；

The trend of axial magnetic magnetic circuit：Current direction meets right-hand screw rule with flow direction；Axial magnetic coil (5A) is by electricity It flows away to energization, then from B axle, to magnetic guiding loop, (the 1D)s pass through A axial directions magnetic guiding loop (1A) to magnetic flux respectively, thrust disc (61) returns to B axle forms a closed magnetic loop to magnetic guiding loop (1D)；

The trend of upper right corner electromagnetic circuit is：Coil (51) and coil (52) are powered by current trend, then magnetic flux is from stator tooth (8A1) sets out, and passes through the top-right part of outer disc (8A), the top-right part of stator tooth (8A2), rotor core (7) respectively Stator tooth (8A1) is returned to, the electromagnetic circuit in the upper right corner is formed；

The trend of lower right corner electromagnetic circuit is：Coil (53) and coil (54) are powered by current trend, then magnetic flux is from stator tooth (8A3) sets out, and passes through the lower right corner part of outer disc (8A), the lower right corner part of stator tooth (8A4), rotor core (7) respectively Stator tooth (8A3) is returned to, the electromagnetic circuit in the lower right corner is formed；

The trend of lower left corner electromagnetic circuit is：Coil (55) and coil (56) are powered by current trend, then magnetic flux is from stator tooth (8A5) sets out, and passes through the lower left corner part of outer disc (8A), the lower left corner part of stator tooth (8A6), rotor core (7) respectively Stator tooth (8A5) is returned to, the electromagnetic circuit in the lower left corner is formed；

The trend of upper left corner electromagnetic circuit is：Coil (57) and coil (58) are powered by current trend, then magnetic flux is from stator tooth (8A7) sets out, and passes through the upper left hand corner section of outer disc (8A), the upper left hand corner section of stator tooth (8A8), rotor core (7) respectively Stator tooth (8A7) is returned to, the electromagnetic circuit in the upper left corner is formed.

5. the orthogonal magnetic circuit journal axle one magnetcisuspension according to claim 1 based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held, it is characterised in that：Radial direction magnetic bearing coil group (5) is that the pairs of coil of fine copper coiling is constituted, each coil is 90 ~120 circles, line footpath 0.5mm.

6. the orthogonal magnetic circuit journal axle one magnetcisuspension according to claim 5 based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held, it is characterised in that：Radial direction magnetic bearing coil group (5) can be that the power that orthogonal magnetic circuit radial magnetic bearing provides is 60W~80W.

7. the orthogonal magnetic circuit journal axle one magnetcisuspension according to claim 1 based on symmetrical self-lubricating flexibility auxiliary bearing structure Floating axle is held, it is characterised in that：Armature spindle (6) is the output shaft of high speed magnetic suspension motor.