CN205663757U - Five degrees of freedom of permanent magnetism biasing integrate magnetic suspension braced system - Google Patents

Abstract

The utility model discloses a permanent magnetic bias five-degree-of-freedom integrated magnetic suspension support system. The stator includes a left radial magnetic bearing core and a right radial magnetic bearing core; a left annular permanent magnet and a right annular permanent magnet. Magnet; left axial control iron core, right axial control iron core; radial control iron core is arranged between the left annular permanent magnet and the right annular permanent magnet, and radial control windings are wound on the stator teeth ; The left axial control iron core, the right axial control iron core and the radial control iron core are respectively provided with a right divided magnetic aluminum ring and a left divided magnetic aluminum ring; the left radial magnetic bearing core, The left radial control winding and the right radial control winding are respectively wound in the stator slot of the radial magnetic bearing core on the right; the left axial control iron core and the right axial control iron core both have an E-shaped structure, Axial control windings are respectively wound in the stator slots; the utility model effectively solves the shortcomings of the existing five-degree-of-freedom magnetic suspension support system, and provides a short axial length, high critical speed, simple structure, manufacture and assembly, axial and The radial control magnetic flux does not pass through permanent magnets, which can generate a low-power consumption permanent magnet bias five-degree-of-freedom integrated magnetic levitation support system with greater axial and radial levitation forces.

Description

A permanent magnetic bias five-degree-of-freedom integrated magnetic levitation support system

technical field

The utility model relates to the technical field of bearing manufacturing, in particular to a bearing with short axial length, high critical speed, high utilization rate of iron core materials, simple structure, manufacture and assembly, and neither axial nor radial control magnetic flux passes through permanent magnets. A low-power permanent magnet bias five-degree-of-freedom integrated magnetic levitation support system that can generate greater axial and radial levitation forces.

Background technique

The magnetic levitation support system is a new type of high-performance support system that uses the electromagnetic force between the stator and the rotor to suspend the rotor in space, so that there is no mechanical contact between the stator and the rotor. Since there is no mechanical contact between the stator and the rotor, the rotor supported by the magnetic levitation system can reach a high operating speed, and has the advantages of no mechanical wear, low energy consumption, long life, no lubrication, no pollution, etc., especially suitable for applications In the field of high-speed or ultra-high-speed direct drive.

In order to realize the five-degree-of-freedom stable suspension support of the rotor, the control force must be exerted on the five-degree-of-freedom of the rotor. However, the existing five-degree-of-freedom magnetic levitation support systems all use multiple independent axial single-degree-of-freedom magnetic bearings, radial two-degree-of-freedom magnetic bearings, or radial-axial three-degree-of-freedom magnetic bearing units. The positions are combined into a five-degree-of-freedom magnetic levitation support system, resulting in a longer axial length, low critical speed of the levitation support system, low output power, and complex system structure and control, which limit the application field of the excellent characteristics of the maglev support system.

Contents of the invention

The technical problem to be solved by the utility model is to provide a permanent magnetic bias five-degree-of-freedom integrated magnetic suspension support system. The utility model effectively solves the shortcomings of the existing five-degree-of-freedom magnetic suspension support system and provides a short axial length High critical speed, simple structure, manufacture and assembly, no axial and radial control flux through permanent magnets, low power consumption permanent magnet bias five-degree-of-freedom integrated magnetic levitation that can generate greater axial and radial levitation forces supporting system.

The utility model is realized through the following technical solutions:

A permanent magnetic bias five-degree-of-freedom integrated magnetic levitation support system, including a stator and a rotor core (33), characterized in that: the rotor core (33) includes an axial part and a radial part; the stator includes Along the axial part of the rotor core (33) and with the radial part of the rotor core (33) as the center of symmetry, the left radial magnetic bearing core (1) and the right radial magnetic bearing core (1) are arranged symmetrically in sequence. Iron core (9); left annular permanent magnet (2), right annular permanent magnet (8); left axial control iron core (4), right axial control iron core (7); left annular permanent magnet A radial control iron core (5) is arranged between the magnet (2) and the right annular permanent magnet (8), and radial control windings (32) are wound on the stator teeth; the left axial control iron core (4 ), the right axial control iron core (7) and the radial control iron core (5) are respectively provided with the right divided magnetic aluminum ring (6) and the left divided magnetic aluminum ring (3); the left radial The magnetic bearing core (1) and the right radial magnetic bearing core (9) are respectively wound in the stator slots of the left radial control winding (15) and the right radial control winding (16); the left axial The control iron core (4) and the right axial control iron core (7) both have an E-shaped structure, and the axial control windings (13) are respectively wound in the stator slots, and the axial control windings (13) respectively generate left axial Control Flux (29) and Right Axial Control Flux (23).

The further technical improvement scheme of the utility model is:

The left axial control iron core (4) and the right axial control iron core (7) are respectively composed of suction discs (10, 14) arranged at the upper and lower positions and control discs (11, 12) arranged at the middle position. ), the axial control winding (13) is wound between the suction discs (10, 14) and the control discs (11, 12).

The further technical improvement scheme of the utility model is:

The length of the air gap between the control discs (11, 12) and the radial part of the rotor core (33) is greater than the air gap between the suction discs (10, 14) and the radial part of the rotor core (33) length, and the length of the air gap between the suction discs (10, 14) and the radial part of the rotor core (33) is smaller than that of the left axial control core (4), the right axial control core (7) and The length of the air gap between the axial sections of the rotor core (33).

The further technical improvement scheme of the utility model is:

The left annular permanent magnet (2) and the right annular permanent magnet (8) are axially magnetized annular permanent magnets, which provide radial and axial bias magnetic fluxes for five degrees of freedom.

The further technical improvement scheme of the utility model is:

The right divided magnetic aluminum ring (6) and the left divided magnetic aluminum ring (3) are made of a whole piece of aluminum to ensure that the permanent magnets generate both radial and axial bias fluxes, and Reduce magnetic flux leakage.

The further technical improvement scheme of the utility model is:

The left radial magnetic bearing core (1), the left axial control core (4), the radial control core (5), the right axial control core (7), the rotor core (33 ), the right radial magnetic bearing core (9) are all made of materials with good axial and radial magnetic properties.

The further technical improvement scheme of the utility model is:

Both the left ring permanent magnet (2) and the right ring permanent magnet (8) are made of rare earth permanent magnet materials.

Compared with the prior art, the utility model has the following obvious advantages:

1. The permanent magnet bias five-degree-of-freedom integrated magnetic levitation support system of the utility model is provided by two axially magnetized annular permanent magnets in five degrees of freedom to provide bias flux, and the corresponding control windings are energized to generate axial control The magnetic flux, the left radial control flux, the right radial control flux, the radial control flux, the bias flux corresponding to the air gap and the control flux are superimposed on each other, through the displacement in five degrees of freedom Closed-loop control ensures that the radial and axial air gaps between the stator and rotor are uniform, and realizes the stable suspension support of the rotor in five degrees of freedom.

2. Each control magnetic flux of the utility model does not form a closed path through a permanent magnet with large reluctance, and has the advantages of producing relatively large axial and radial levitation forces and low power consumption; the left and right side magnetic aluminum rings ensure Permanent magnets generate both radial and axial bias fluxes;

3. The permanent magnetic bias five-degree-of-freedom integrated magnetic levitation support system of the utility model is formed by stacking the above-mentioned parts along the axial direction. The structure is simple, easy to manufacture and assemble, the axial length is short, and the critical speed is high, which can be used Flywheel energy storage, various high-speed machine tool spindle motors and sealed pumps, centrifuges, compressors, high-speed small hard disk drives and other fields.

Description of drawings

Fig. 1 is a schematic structural diagram of the utility model permanent magnetic bias five-degree-of-freedom integrated magnetic levitation support system;

Fig. 2 is a schematic diagram of the magnetic circuit of the permanent magnet bias five-degree-of-freedom integrated magnetic levitation support system of the present invention.

detailed description

The utility model is based on the principle that two axially magnetized left annular permanent magnets 2 and right annular permanent magnet 8 provide bias magnetic flux to the five-degree-of-freedom integrated magnetic suspension support system, that is, the left radial magnetic bearing The left radial bias flux 28, the left axial bias flux 26 and 27, the right radial bias flux 18, the right axial bias flux 20 and 21, the radial bias flux Through 17 and 24; the left radial control winding 15 produces the left radial control magnetic flux 31, which interacts with the left radial bias magnetic flux 28 to generate the left radial levitation force; the right radial control winding 16 produces The right radial control magnetic flux 30 interacts with the right radial bias magnetic flux 18 to generate the right radial levitation force; the axial control winding 13 generates the left axial control magnetic flux 29 and the right axial control magnetic flux respectively. The magnetic flux 23, the left axial control magnetic flux 29 interacts with the left axial bias magnetic flux 26, 27, the right axial control magnetic flux 23 interacts with the right axial bias magnetic flux 20, 21, Generate axial levitation force, radial control winding 32 generates radial control magnetic flux 22, interacts with radial bias magnetic flux 17, 24 to generate radial levitation force. The permanent magnet bias five-degree-of-freedom integrated magnetic levitation support system uses permanent magnets to generate bias flux in all five degrees of freedom. The strength of each axial and radial air gap magnetic field of the highly integrated magnetic levitation support system, through the displacement closed-loop control, keeps the axial and radial air gaps between the stator and rotor uniform, and realizes the five-degree-of-freedom stable suspension support of the rotor.

As shown in Figure 1, the utility model consists of a stator and a rotor. The stator includes a left radial magnetic bearing core 1, a left annular permanent magnet 2, a left magnetic aluminum ring 3, and a left axial control core 4. , radial control iron core 5, right divided magnetic aluminum ring 6, right axial control iron core 7, right annular permanent magnet 8, right radial magnetic bearing iron core 9. The left radial control winding 15 is embedded in the stator slot of the left radial magnetic bearing core 1 , and the right radial control winding 16 is embedded in the stator slot of the right radial magnetic bearing core 9 . The left axial control iron core 4 is made into an E-shaped structure, with a control disc 11 in the middle and a suction disc 10 at the upper and lower positions, and an axial control winding 13 is embedded between the suction disc 10 and the control disc 11 . The right axial control iron core 7 is also made into an E-shaped structure, with a control disc 12 in the middle and a suction disc 14 at the upper and lower positions. An axial control winding 13 is embedded between the suction disc 14 and the control disc 12, and the suction The length of the air gap between the discs 10,14 and the radial part of the rotor core 33 should be less than the length of the air gap between the control discs 11,12 and the radial part of the rotor core 33, and the suction discs 10,14 and The length of the air gap between the radial parts of the rotor core 33 is smaller than the length of the air gap between the left axial control core 4 , the right axial control core 7 and the axial part of the rotor core 33 . A radial control winding 32 is wound on the radial control iron core 5 . The left radial control winding 15 is wound on the left radial magnetic bearing core 1, and the right radial control winding 16 is wound on the right radial magnetic bearing core 9; the rotor core 33 includes an axial part and a radial In the radial part, the left annular permanent magnet 2 and the right annular permanent magnet 8 are both axially magnetized, and are respectively installed between the left radial magnetic bearing iron 1, the left axial control iron core 4, and the radial control iron core 5 Between, right radial magnetic bearing iron core 9 and shaft right axial control iron core 7, between radial control iron core 5. The left magnetic isolation aluminum ring 3 is installed between the left axial control iron core 4 and the radial control iron core 5, and the right magnetic isolation aluminum ring 6 is installed between the right axial control iron core 7 and the radial control iron core between 5.

As shown in Figure 2, the N pole of the axially magnetized left annular permanent magnet 2 is close to the radial control iron core 5 side, and the magnetic circuit of the left radial bias magnetic flux 28 is: the left radial bias magnetic flux 28 Starting from the N pole of the left annular permanent magnet 2, the left magnetic aluminum ring 3 is divided into two parts, namely the bias magnetic flux 25 and the radial bias magnetic flux 24, and the bias magnetic flux 25 passes through the left shaft The control iron core 4 is divided into two parts, that is, the left axial bias magnetic flux 26 and 27 enters the radial part of the left axial working air gap and the rotor core 33 from the suction disk 10, and the radial bias flux The magnetic flux 24 enters the radial part of the rotor core 33 through the radial control core 5 and the radial working air gap, and then both pass through the axial part of the rotor core 33 and the working air gap of the left radial magnetic bearing 1. The radial magnetic bearing iron core 1 on the left side returns to the S pole of the ring permanent magnet 2 on the left side to form a closed magnetic circuit.

The right annular permanent magnet 8 produces the right radial bias magnetic flux 18, and the magnetic circuit of the right radial bias magnetic flux 18 is: starting from the N pole of the right annular permanent magnet 8, and dividing the magnetic aluminum ring by the right 6 is divided into two parts, that is, the bias magnetic flux 19 and the radial bias magnetic flux 17, and the bias magnetic flux 19 is divided into two parts through the right axial control iron core 7, that is, the right axial bias magnetic flux 20 and 21. From the suction disc 14, it enters the right axial working air gap and the radial part of the rotor iron core 33, while the radial bias magnetic flux 17 passes through the radial control iron core 5 and the radial working air gap, and enters the rotor iron The radial part of the core 33, and then the two pass through the axial part of the rotor core 33, the right radial magnetic bearing working air gap, the right radial magnetic bearing core 1, and return to the right ring permanent magnet 8 The S pole forms a closed magnetic circuit. The left radial control magnetic flux 31 passes through the lower half of the left radial magnetic bearing core 1, the lower working air gap, the axial part of the rotor core 33, the upper working air gap, the left radial magnetic bearing iron The upper half of the core 1 and the circumference of the stator form a closed path; the right radial control flux 30 passes through the lower half of the right radial magnetic bearing core 9, the lower working air gap, the axial part of the rotor, and the upper working The air gap, the upper half of the right radial magnetic bearing core 9, and the circumference of the stator form a closed path; the left axial control magnetic flux 29 passes through the suction disc 10 of the left axial control core 4, the axial working gas Gap, the radial part of the rotor core 33 and the control disc 11 of the left axial control core 4 form a closed path; the right axial control magnetic flux 23 passes through the suction disc 14 of the right axial control core 7, The axial working air gap, the radial part of the rotor core 33 and the control disk 12 of the right axial control core 7 form a closed path; the radial control magnetic flux 22 passes through the lower half of the radial control core 5, the lower The side radial working air gap, the radial part of the rotor core, the upper radial working air gap, the upper half of the radial control core 5, and the circumference of the stator form a closed path.

This permanent magnet bias five-degree-of-freedom integrated maglev support system uses two axially magnetized annular permanent magnets to establish radial and axial bias fluxes, and the stator and rotor cores are both axially and radially magnetically conductive The ring permanent magnet is made of high-performance materials, and the ring permanent magnet is magnetized in the axial direction. The ring permanent magnet 2 on the left and the ring permanent magnet 8 on the right are radial rings, which are magnetized along the axial direction. Rare earth permanent magnets or iron with good magnetic properties are used. Oxygen permanent magnets and control windings are all made of electromagnetic coils with good conductivity and then dried with paint. The magnetic bias five-degree-of-freedom integrated magnetic levitation support system is formed by stacking the above-mentioned parts along the axial direction, with short axial length, high critical speed, high utilization rate of iron core materials, simple structure, manufacturing and assembly, and Neither the magnetic flux nor the radial control flux passes through the permanent magnet, which can generate greater axial and radial levitation force.

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims (7)

1. a permanent magnet bias five degree of freedom integrated magnetic suspension support system, including stator, rotor core (33), its feature exists In: described rotor core (33) includes axial component, radial component；Described stator includes the axial part along rotor core (33) Point, and with the radial component of rotor core (33) as symmetrical centre, the most symmetrically arranged left radial magnetic bearing iron core (1), Right radial magnetic bearing iron core (9)；Left side annular permanent magnet (2), right circular permanent magnet (8)；Left side axially controls iron core (4), right side axially controls iron core (7)；Radially control it is provided with between left side annular permanent magnet (2), right circular permanent magnet (8) Iron core (5), its stator tooth is wound with and radially controls winding (32)；Left side axially controls iron core (4), right side axially controls iron core (7) and radially control to be respectively arranged with right side point magnetic aluminum ring (6) between iron core (5), magnetic aluminum ring (3) is divided in left side；Left radial magnetic In bearing iron core (1), right radial magnetic bearing iron core (9) stator slot, the most corresponding coiling left radial controls winding (15), the right side Side radially controls winding (16)；Left side axially controls iron core (4), right side axially controls iron core (7) all in E shape structure, stator slot Coiling axially controls winding (13) the most respectively, axially control winding (13) produce respectively on the left of axially control magnetic flux (29) and right side Axially control magnetic flux (23).

A kind of permanent magnet bias five degree of freedom integrated magnetic suspension support system the most according to claim 1, it is characterised in that: Described left side axially controls iron core (4), right side axially control iron core (7) respectively by upper-lower position arrange suction disk (10, 14) and centre position arrange control disk (11,12) constitute, axially control winding (13) be wound in suction disk (10, 14) and control between disk (11,12).

A kind of permanent magnet bias five degree of freedom integrated magnetic suspension support system the most according to claim 2, it is characterised in that: Gas length between described control disk (11,12) and rotor core (33) radial component more than suction disk (10,14) with Gas length between rotor core (33) radial component, and suction disk (10,14) and rotor core (33) radial part divide it Between gas length axially control iron core (4) less than left side, right side axially controls iron core (7) and rotor core (33) axial component Between gas length.

A kind of permanent magnet bias five degree of freedom integrated magnetic suspension support system the most according to claim 1 and 2, its feature exists In: described left side annular permanent magnet (2), right circular permanent magnet (8) are the annular permanent magnet of axial charging, are five freedom Degree provides radial and axial biasing magnetic flux.

A kind of permanent magnet bias five degree of freedom integrated magnetic suspension support system the most according to claim 1 and 2, its feature exists In: described right side divides magnetic aluminum ring (6), left side to divide magnetic aluminum ring (3) to be made up of monoblock aluminium, it is ensured that permanent magnet had both produced radial offset Magnetic flux produces again axialy offset magnetic flux, and reduces leakage field.

A kind of permanent magnet bias five degree of freedom integrated magnetic suspension support system the most according to claim 1 and 2, its feature exists In: described left radial magnetic bearing iron core (1), left side axially control iron core (4), radially control iron core (5), right side and axially control Iron core processed (7), rotor core (33), right radial magnetic bearing iron core (9) all use has good axially and radially magnetic property Material make.

A kind of permanent magnet bias five degree of freedom integrated magnetic suspension support system the most according to claim 4, it is characterised in that: Described left side annular permanent magnet (2), right circular permanent magnet (8) are rare earth permanent-magnetic material and make.