CN102303709B - Large-torque magnetic suspension flywheel - Google Patents

Abstract

A high-torque magnetic levitation flywheel can be used as an actuator for attitude stability and attitude maneuvering of spacecraft such as satellites and earth observation platforms. , Lorentz force magnetic bearing assembly, motor assembly and sensor assembly and other components. The mandrel is located in the center of the wheel body, the radial outside of the mandrel is the stator assembly, the radial outside of the stator assembly is the rotor assembly, the rotor assembly is composed of the wheel rim and the hub, and the Lorentz force magnetic bearing assembly is composed of the magnetic bearing stator part It is composed of the magnetic bearing rotor part, the adapter plate connects the core shaft, the stator assembly and the motor stator, and the sensor assembly is composed of a sensor shell and a sensor. The layout of each component of the invention is reasonable and compact, not only the attitude of the spacecraft can be stabilized, but also the attitude maneuver of the spacecraft can be realized by utilizing the large control moment provided by the gyro effect of the magnetic levitation flywheel.

Description

A High Torque Magnetic Suspension Flywheel

technical field

The invention relates to a high-torque magnetic levitation flywheel, which can be used as an actuator for attitude control systems of spacecraft such as satellites and earth observation platforms.

Background technique

With the diversification of spacecraft missions such as satellites and earth observation platforms, spacecraft have higher and higher requirements for the actuators of the attitude control system. At present, the flywheel used as the actuator of the spacecraft attitude control system is generally still supported by mechanical bearings. The mechanical bearings have problems such as mechanical wear, unbalanced vibration uncontrollable, and large zero-crossing friction torque. In the existing magnetic levitation flywheel structure based on magnetic bearing support, two single-degree-of-freedom axial magnetic bearings + two two-degree-of-freedom radial magnetic bearing structures are generally used, or two three-degree-of-freedom axial magnetic bearings + one two-degree-of-freedom magnetic bearing degree radial magnetic bearing structure. No matter which structure is adopted, the main function is to control the attitude of the spacecraft through the momentum exchange system. In order to meet the requirements for the bearing capacity of the spacecraft under the condition of large angular rate, it is necessary to increase the output force of the rotor, which can only be increased by increasing the length of the torsional arm. That is, the span of the bearing rotor will inevitably increase the weight and volume of the flywheel, so the existing magnetic levitation flywheel has the disadvantage of small torque.

Contents of the invention

The technical problem of the present invention is: to overcome the shortcomings of the existing mechanical bearing flywheel and magnetic suspension bearing flywheel, to provide a kind of high torque magnetic suspension flywheel which is convenient for motor control, has large torque in a short time and utilizes the gyro effect.

The technical solution of the present invention is: a high-torque magnetic levitation flywheel, which is composed of a static part and a rotating part. The stator part of the decoupling tapered magnetic bearing assembly, the stator part of the Lorentz magnetic bearing assembly, the sensor assembly and the stator part of the motor assembly; the rotating part includes: limit sleeve, the rotor part of the radial decoupling tapered magnetic bearing assembly, Lorentz The rotor part of the Lenz force magnetic bearing assembly and the rotor part of the motor assembly. The mandrel is located in the center of the wheel body and fixed on the adapter plate. The mandrel is equipped with a protective bearing and a shaft sleeve. The radial outer side of the protective bearing is a limit sleeve. The protective bearing and the limit sleeve form a radial protection gap in the radial direction. , forming an axial protection gap in the axial direction, the radially outer side of the limit sleeve is the hub, the radially outer side of the hub is the rim, the hub and the rim constitute the rotor assembly, and the radial decoupling tapered magnetic bearing assembly is located on the mandrel In the cavity formed by , limiting sleeve and hub, the stator part of the radial decoupling tapered magnetic bearing assembly is fixed on the shaft sleeve, and the rotor part is installed on the hub. The radially outer side of the radially decoupling tapered magnetic bearing assembly It is a motor assembly, the stator part of the motor assembly is connected with the adapter plate, the rotor part is installed on the hub, the radial outside of the motor assembly is the sensor assembly, the sensor assembly is located in the gap formed by the hub and the rim, and fixed on the base. The radial outside of the sensor assembly is the Lorentz force magnetic bearing assembly, the stator part of the Lorentz force magnetic bearing assembly is installed on the base, the rotor part is installed on the wheel rim, the sealing cover is installed on the base, and the base is located on the flywheel. the very bottom.

The radial decoupling tapered magnetic bearing is composed of a stator part and a rotor part, wherein the stator part includes a stator magnetic permeable ring, an upper conical stator, a stator magnetic isolation ring, an axial upper layer coil, a permanent magnet, and a radial stator , Radial stator magnetic isolation ring, radial coil, lower conical stator and axial lower coil, the rotor part includes upper conical rotor, rotor magnetic ring, radial rotor core, rotor magnetic isolation ring, lower conical rotor, The outer side of the permanent magnet is the radial stator. There are two radial stators, which are placed orthogonally along the circumferential direction. There is a radial stator magnetic isolation ring between the two radial stators. The radial coil is wound on the radial stator teeth, the upper and lower sides of the permanent magnet in the axial direction are stator magnetic isolation rings, the radial inner side of the permanent magnet and the stator magnetic isolation ring is the stator magnetic conduction ring, and the stator guide The upper and lower ends of the magnetic ring are the upper conical stator and the lower conical stator respectively, the outer side of the radial stator is the radial rotor core, the radial magnetic air gap is between the radial stator and the radial rotor core, and the radial rotor core The upper and lower sides are rotor magnetic isolation rings. The rotor magnetic conductive ring is installed on the radial outer side of the radial rotor core and the rotor magnetic isolation ring, and connects the upper conical rotor and the lower conical rotor to form a magnetic path. The upper conical The outer side of the stator is the upper conical rotor, the upper conical air gap is between the upper conical stator and the upper conical rotor, the outer side of the lower conical stator is the lower conical rotor, and the gap between the lower conical stator and the lower conical rotor is It is a lower tapered air gap, the upper tapered stator and the lower tapered stator are full-ring structures along the circumferential direction, and the axial upper layer coil and the axial lower layer coil are respectively sleeved inside the upper tapered stator and the lower tapered stator. There is one radial stator in the x and y directions. Two radial stators and adjacent stator magnetic isolation rings, permanent magnets, and radial stator magnetic isolation rings together form the radial stator part. The two radial stators are placed orthogonally, the radial stator magnetic isolation ring is located between the two channel stators, and is used to isolate the permanent magnet magnetic circuit and the electromagnetic magnetic circuit of the two channels, and the radial stator part of a single channel includes the radial Stator, permanent magnet, radial stator magnetic isolation ring, each radial stator is composed of stator teeth and stator magnetic yoke, and the stator part formed by two radial stators has four stator teeth evenly distributed along the circumference. The upper and lower conical stators adopt the whole ring structure, and the normal line of the conical stator and rotor surface passes through the centroid, so no matter where the rotor is, the suction direction generated by each point on the conical rotor surface passes through the centroid, thus avoiding bearing load. The effect of the moment generated by the stiffness force on the torsion of the rotor. The radial decoupling tapered magnetic bearing is a non-contact active control magnetic suspension bearing with permanent magnetic bias and electromagnetic control.

The sensor assembly has 4 orthogonally placed axial probes and 4 orthogonally placed radial probes, wherein the axial probes are respectively placed along the +y, +x, -y and -x directions, and the axial probes complete For the detection of the axial translational displacement of the rotor, two radial rotational displacements are calculated through the detected axial translational displacement. The radial probes and the axial probes are evenly arranged on the circumference. The probes are placed at 45 degrees, and the radial probes complete the detection of the two radial translational displacements of the rotor.

The Lorentz force magnetic bearing assembly is composed of an outer rotor, an inner rotor and a stator, and the outer rotor is composed of an outer magnetic ring, an outer magnetic steel one, an outer magnetic steel two, an outer spacer ring and an outer pressure ring, wherein the outer guide The magnetic ring is located on the radial outside of the outer magnetic steel 1, the outer spacer ring and the outer magnetic steel 2, the outer spacer ring is located in the axial middle of the outer magnetic steel 1 and the outer magnetic steel 2, and the outer pressure ring is located in the outer magnetic steel of the outer magnetic ring Below the axial direction of the second, the inner rotor is composed of inner magnetic ring, inner magnetic steel 1, inner magnetic steel 2, inner spacer ring and inner magnetic ring lock nut, of which two inner magnetic steel and inner spacer ring are located in the inner magnetic The radial outer side of the ring, the inner spacer ring is located in the axial middle of the two inner magnetic steels, the inner magnetic ring lock nut is located under the axial direction of the inner magnetic ring and the second inner magnetic steel, and the stator is composed of a stator skeleton and a stator outer coil , the stator is located in the gap between the inner rotor and the outer rotor, and the outer rotor is located radially outside the stator.

The principle of the above scheme is: by controlling the magnitude and direction of the current in the electric excitation coil of the radial decoupling conical magnetic bearing, the two degrees of freedom of the rotor’s radial translation and axial translation are controlled to maintain the rotation of the flywheel The gap between the part and the stationary part is uniform; the rotation of the flywheel is controlled by the motor to realize the torque output; the control of the two radial degrees of freedom of the rotor is completed by controlling the magnitude and direction of the current in the Lorentz force magnetic bearing coil. As shown in Figure 1, the present invention uses radial decoupling conical magnetic bearings to control two radial degrees of freedom and one axial degree of freedom of the rotor, while Lorentz force magnetic bearings control the two radial degrees of freedom of the rotor. rotational degrees of freedom.

The three-degree-of-freedom radial decoupling tapered magnetic bearing in the present invention is a kind of three-degree-of-freedom radial and axial integrated magnetic bearing, which can control the translation of the rotor along the radial x and y directions and the axial movement along the z direction. Translational motion, that is, use the interaction force between the conical stator and the conical rotor to control the axial translation, and use the interaction force between the radial stator and the radial rotor to control the radial translation. The permanent magnet is also a cone The surface magnetic air gap and the radial magnetic air gap provide bias magnetic flux, as shown in the direction of the solid arrow in Figure 2(b), the permanent magnetic flux path generated by the permanent magnet is: the magnetic flux starts from the N pole of the permanent magnet , passing through the radial stator in the x direction and the y direction, and the radial air gap in the x and y direction to the rotor core, and then the magnetic flux through the rotor magnetic conduction ring is divided into two paths, respectively passing through the upper and lower conical rotors and the upper and lower conical air gaps, to reach the upper and lower The tapered stator returns to the S pole of the permanent magnet through the stator magnetic ring. As shown in the direction of the dotted arrow in Figure 2(b), the path of the electric excitation magnetic circuit generated after the upper and lower coils are energized in the axial direction is: the electric excitation flux starts from the upper conical stator, passes through the stator magnetic ring to the lower conical stator , then pass through the lower conical air gap to the lower conical rotor, the rotor magnetic ring, the upper conical rotor, the upper conical air gap, and finally return to the upper conical stator. When changing the axial control in the upper and lower coils When the electric current is flowing, the magnetic flux density of the electric excitation will change, and the suction force between the conical rotor and the conical stator will change, and then the resultant force in the z direction will be changed, thereby controlling the translation in the z direction. The path of the electric excitation magnetic circuit in the radial x direction is shown in the direction of the dotted arrow in Figure 2(a): the electric excitation flux starts from the radial stator teeth in the +x direction, passes through the magnetic air gap in the +x direction, and the radial rotor core , magnetic air gap in the -x direction, radial stator teeth in the -x direction, and then pass through the stator magnetic yoke in the x direction, and return to the stator teeth in the +x direction to form a loop. The electrical excitation magnetic circuit in the radial y direction is similar to that in the x direction. Due to the existence of the stator magnetic isolation ring, the permanent magnetic circuits in the radial x direction and the y direction are not coupled to each other, and the electric excitation magnetic circuit is also not coupled to each other. Therefore, when the air gap in the x direction changes significantly, the magnetic flux generated by the current in the x direction The voltage drop falls on the magnetic air gap in the +x and -x directions, so the current can generate a corresponding electromagnetic magnetic density in the x direction, and then change the output in the x direction, thereby controlling the translation in the x direction, and the translation in the y direction The principle of movement is similar to that in the x direction. The upper and lower tapered stators adopt a full-ring structure, and the axial passage is controlled by the interaction force between the tapered stator and the tapered rotor.

The high-speed motor of the present invention has a stator-less core structure, and is composed of a stator, an outer rotor and an inner rotor. The stator (including a skeleton and a coil) is located in the gap between the inner rotor and the outer rotor, and the outer rotor is located on the radially outer side of the stator, forming a magnetic Gap (as shown in Figure 5), by controlling the size and direction of the current in the high-speed motor coil, to control the size and direction of the flywheel rotor speed, to achieve torque output and low power consumption.

The Lorentz force magnetic bearing of the present invention is a magnetic levitation bearing adopting the principle of Lorentz force. By controlling the magnitude and direction of the respective currents of the four sets of coils, the magnitude and direction of the generated Lorentz force are controlled, thereby changing the radial x The direction and the radial y direction control the magnitude and direction of the torque, that is, the interaction force between the stator and the rotor of the magnetic bearing is used to control the rotation of the flywheel rotor in the radial x direction and the radial y direction to achieve torque output. Lorentz magnetic bearings are used only to provide torsional force, not support.

When the gap between the rotor part and the stator part of the radial decoupling conical magnetic bearing of the flywheel or the gap between the rotor part and the stator part of the Lorentz force magnetic bearing changes, the displacement sensor will detect the change of the gap in time and send the displacement signal Feedback to the magnetic bearing controller, the magnetic bearing controller can generate the required control torque by controlling the current in the radial decoupling conical magnetic bearing and the Lorentz force magnetic bearing coil, and realize the stable control of five degrees of freedom, so that Realize the attitude stability and attitude maneuver of the flywheel.

Compared with the prior art, the present invention has the advantages that: the present invention adopts the radial decoupling tapered magnetic bearing to control the axial translation and radial translation of the rotor, and the Lorentz force magnetic bearing only controls the radial rotation of the rotor, relatively Compared with the traditional magnetic suspension bearing flywheel, it has the following advantages:

(1) The traditional magnetic suspension flywheel mainly increases the radial rotation control torque by increasing the span of the radial magnetic suspension bearing, while the radial rotation control torque of the flywheel of the present invention is generated by the Lorentz force magnetic bearing, and the Lorentz force The magnetic bearing has no stator core, low loss, and its bearing force has a constant linear relationship with the control current. There is no negative displacement stiffness, and the gyro effect of the flywheel is used to provide a large radial rotation control torque. Therefore, compared with the existing magnetic suspension With the flywheel structure, the radial rotation control torque of the present invention is significantly increased, which improves the ability to resist external disturbance and adjust the attitude;

(2) Since only one radial decoupling conical magnetic bearing is needed to control the translation of the rotor, the axial size of the stator shaft is effectively reduced, the vibration introduced by the first-order natural mode of the stator shaft is reduced, and the vibration of the flywheel is reduced The level improves the anti-shock load capacity and reliability of the flywheel, the reduction of the axial dimension reduces the weight of the flywheel, and the component layout is more reasonable and compact.

Description of drawings

Fig. 1 is the structural representation of a kind of high moment magnetic levitation flywheel of the present invention;

Fig. 2 is an axial sectional view and an end view of the radial decoupling tapered magnetic bearing of the present invention, wherein (a) is an end view, and (b) is an axial sectional view;

Fig. 3 is a perspective view and an exploded view of the radial stator of the radially decoupled tapered magnetic bearing of the present invention, wherein (a) is a perspective view of the assembly, and (b) is an exploded view of the assembly;

Fig. 4 is a schematic diagram of the negative stiffness moment of the radial decoupling tapered magnetic bearing of the present invention being 0;

Fig. 5 is the axial sectional view of motor of the present invention;

Fig. 6 is the schematic diagram of displacement sensor of the present invention;

Fig. 7 is an axial sectional view and an end view of the Lorentz magnetic bearing of the present invention, wherein (a) is an axial sectional view, and (b) is an end view;

Fig. 8 is an axial sectional view and an end view of the Lorentz force magnetic bearing stator of the present invention, wherein (a) is an axial sectional view, and (b) is an end view.

Detailed ways

As shown in Figure 1, the present invention consists of a static part and a rotating part. The static part includes: a base (11), a sealing cover (8), a mandrel (5), a shaft sleeve (13), an adapter plate (10), Protective bearing (6), radial decoupling conical magnetic bearing assembly (4) stator section, Lorentz force magnetic bearing assembly (1) stator section, sensor assembly (12) and motor assembly (9) stator section; rotating section Including: wheel rim (2), hub (3), limit sleeve (7), radial decoupling conical magnetic bearing assembly (4) rotor part, Lorentz force magnetic bearing assembly (1) rotor part and motor assembly (9) Rotor section. The mandrel (5) is located at the center of the wheel body and is fixed on the adapter plate (10). The mandrel (5) is equipped with a protective bearing (6) and a shaft sleeve (13). The radial outer side of the protective bearing (6) is The limit sleeve (7), the protective bearing (6) and the limit sleeve (7) form a radial protection gap in the radial direction, which is 0.1mm, and form an axial protection gap in the axial direction, which is 0.2mm, and the limit sleeve ( The radial outer side of 7) is the hub (3), the radial outer side of the hub (3) is the wheel rim (2), the radial outer side of the bushing (13) is the radial decoupling tapered magnetic bearing assembly (4), The radial decoupling tapered magnetic bearing assembly (4) stator part is fixed on the shaft sleeve (13), its rotor part is installed on the hub (3), and the radially outer side of the radial decoupling tapered magnetic bearing assembly (4) is the motor assembly (9), the stator part of the motor assembly (9) is connected to the adapter plate (10), the rotor part is installed on the inner side of the hub (3), and the radial outer side of the motor assembly (9) is the sensor assembly ( 12), the sensor assembly (12) is located in the gap formed by the hub (3) and the rim (2), fixed on the base (11), and the radial outside of the sensor assembly (12) is a Lorentz force magnetic bearing assembly ( 1), the stator part of the Lorentz force magnetic bearing assembly (1) is installed on the base (11), the rotor part is installed on the wheel rim (2), the sealing cover (8) is installed on the base (11), the base (11) Located at the very bottom of the flywheel.

Fig. 2 is an axial sectional view and an end view of the radial decoupling tapered magnetic bearing of the present invention, wherein (a) is an end view, (b) is an axial sectional view, and the magnetic suspension bearing assembly 4 is located on the mandrel 5, In the cavity formed by the limit sleeve 7 and the hub 3, the stator part is fixed on the shaft sleeve 13, and the rotor part is installed on the hub 3, which is an active magnetic suspension bearing with permanent magnetic bias and electromagnetic control, mainly consisting of the stator part and the hub 3. The rotor part is composed of the stator part, wherein the stator part includes the stator magnetic ring 401, the upper tapered stator 402, the stator magnetic isolation ring 403, the axial upper layer coil 404, the permanent magnet 405, the radial stator 406, the radial stator magnetic isolation ring 407, the diameter To the coil 408, the lower conical stator 409 and the axially lower coil 410, the rotor part includes the upper conical rotor 411, the rotor magnetic conduction ring 412, the radial rotor core 413, the rotor magnetic isolation ring 414, and the lower conical rotor 415, wherein The outer side of the permanent magnet 405 is a radial stator 406, and there are two radial stators 406, which are placed orthogonally along the circumferential direction. There is a radial stator magnetic isolation ring 407 between the two radial stators, and each radial stator is composed of stator teeth. 419 and the stator magnetic yoke 420, radial coils 408 are wound on the radial stator teeth, the upper and lower sides of the permanent magnet 405 are stator magnetic isolation rings 403, the diameter of the permanent magnet 405 and the stator magnetic isolation ring 403 The inner side is the stator magnetic ring 401, the upper and lower ends of the stator magnetic ring 401 are the upper tapered stator 402 and the lower tapered stator 409 respectively, the outer side of the radial stator 406 is the radial rotor core 413, the radial stator 406 and the Between the radial rotor cores 413 is a radial magnetic air gap 416, the upper and lower sides of the radial rotor core 413 are rotor magnetic isolation rings 414, and the rotor magnetic permeable ring 412 is installed on the diameter of the radial rotor core 413 and the rotor magnetic isolation ring 414. To the outside, and the upper conical rotor 411 and the lower conical rotor 415 are connected to form a magnetic path, the outer side of the upper conical stator 402 is the upper conical rotor 411, between the upper conical stator 402 and the upper conical rotor 411 It is the upper conical air gap 417, the outer side of the lower conical stator 409 is the lower conical rotor 415, between the lower conical stator 409 and the lower conical rotor 415 is the lower conical air gap 418, the upper conical stator 402 and the lower The tapered stator 409 is a full-ring structure along the circumferential direction, and the axially upper coil 404 and the axially lower coil 410 are sleeved inside the upper tapered stator 402 and the lower tapered stator 409 respectively. Among them, there is one radial stator 406 in each of the x and y directions, and two radial stators and adjacent stator magnetic isolation rings 403, permanent magnets 405, and radial stator magnetic isolation rings 407 together form the radial stator part, as shown in the figure 3, where Figure 3(a) is a perspective view of the radial stator part, and Figure 3(b) is an exploded view of the radial stator part assembly, the two radial stators in the x and y directions are placed orthogonally during installation, and the radial The stator magnetic isolation ring 407 is located between the stators of the two channels, and is used to isolate the permanent magnetic circuit and the electromagnetic magnetic circuit of the two channels. The radial stator part of a single channel includes a radial stator 406, a permanent magnet 405, and a radial stator magnetic isolation ring 407. Each radial stator 406 is composed of stator teeth 419 and a stator magnetic yoke 420, and two radial stators form The stator part has four stator teeth 419 evenly distributed along the circumference. Both the upper and lower tapered stators adopt a full-ring structure, and the normals of the tapered stator and rotor surfaces pass through the centroid, so no matter where the rotor is, the direction of suction generated by each point on the conical rotor surface passes through the center of mass (as shown in Figure 4 ), thereby avoiding the influence of the torque generated by the negative stiffness force of the bearing on the rotor torsion.

Fig. 5 is the axial sectional view of the motor assembly of the present invention, and this motor assembly 9 is positioned at the radial outside of radial decoupling tapered magnetic bearing assembly 4, is made up of stator, outer rotor and inner rotor, and its stator part is made of cup-shaped The stator 91 and the stator coil 97 fixed on the cup-shaped stator 91 are composed of a stationary part, the cup-shaped stator 91 is fixed on the adapter plate 10, the outer rotor and the inner rotor part of the motor assembly 9 are installed on the hub 3, the outer The rotor part is composed of the outer rotor pressing plate 92 of the motor, the outer rotor lamination 93 and the magnetic steel 94, wherein the outer rotor lamination 93 is located on the radially outer side of the magnetic steel 94, and the inner rotor part is composed of the inner rotor lamination 95 and the inner rotor pressing plate 96 , the stator part of the motor assembly 9 is located in the gap between the inner rotor and the outer rotor, the outer rotor is located radially outside the stator, the stator, the outer rotor and the inner rotor form a magnetic air gap 98 in the radial direction, and the size of the magnetic air gap 98 is 5.2 mm.

FIG. 6 is a schematic diagram of the displacement sensor of the present invention. The sensor assembly 12 is located in the gap formed by the hub 3 and the rim 2 and consists of two parts: probes 121 - 128 and a sensor housing 129 . The sensor housing 129 shields electromagnetic interference, and the inside is a detection circuit to complete the extraction of rotor displacement information. Probes 121 to 128 are evenly arranged on the circumference, wherein probe 121, probe 123, probe 125 and probe 127 are respectively placed along +y, +x, -y and -x directions to form an axial probe, probe 122, probe 124, The probe 126 and the probe 128 are respectively placed at 45 degrees to the probe 121 , the probe 123 , the probe 125 and the probe 127 to form radial probes. The axial probe completes the detection of the axial translational displacement of the rotor, and calculates two radial rotational displacements through the detected axial translational displacement, and the radial probe completes the detection of two radial translational displacements. The placement method of the sensor probes of the present invention is not unique, as long as the four radial probes are orthogonal and the four axial probes are orthogonal, the positions of the radial probes and the axial probes can be arbitrary.

Fig. 7 is the axial sectional view and the end view of the Lorentz force magnetic bearing assembly of the present invention, wherein (a) is the axial sectional view, (b) is the end view, the magnetic bearing assembly 1 is located at the diameter of the sensor assembly 12 To the outside, it is composed of an outer rotor, a stator and an inner rotor. Both the outer rotor and the inner rotor are installed on the rim 2, and the stator part is connected with the base 11. The outer rotor is composed of an outer magnetic ring 101, an outer magnetic steel-102, an outer magnetic Composed of steel two 115, outer spacer ring 103 and outer pressure ring 104, outer magnetic ring 101 is located on the radial outside of outer magnetic steel one 102, outer spacer ring 103 and outer magnetic steel two 115, outer spacer ring 103 is located on outer magnetic steel The axial middle of one 102 and the outer magnetic steel two 115, the outer pressure ring 104 is located under the axial direction of the outer magnetic ring 101 and the outer magnetic steel two 115, the stator is composed of the stator skeleton 109 and the stator outer coil 110 ~ coil 113, the stator outer Coils 110 to 113 are evenly distributed on the stator frame 109, and are respectively placed along +y, +x, -y and -x directions (as shown in Figure 8, (a) is an axial section view, (b) is an end view ), the inner rotor is composed of inner magnetic ring 105, inner magnetic steel one 106, inner magnetic steel two 116, inner spacer ring 107 and inner magnetic ring lock nut 108, inner magnetic steel one 106, inner spacer ring 107 and inner magnetic Steel two 116 is located at the radial outside of the inner magnetic ring 105, the inner spacer ring 107 is located in the axial middle of the inner magnetic steel one 106 and the inner magnetic steel two 116, and the inner magnetic ring lock nut 108 is located at the inner magnetic ring 105 and the inner Axially below the magnetic steel 2 116, the stator is located in the gap between the outer rotor and the inner rotor, forming a radial magnetic air gap 114, the radial magnetic air gap 114 is 7.2mm in size.

The contents not described in detail in the description of the present invention belong to the prior art known to those skilled in the art.

Claims (2)

1. A high-torque magnetic levitation flywheel, which consists of a stationary part and a rotating part, is characterized in that: the stationary part includes: a base (11), a sealing cover (8), a mandrel (5), a shaft sleeve (13), an adapter Plate (10), Protective Bearing (6), Radial Decoupling Conical Magnetic Bearing Assembly (4) Stator Section, Lorentz Force Magnetic Bearing Assembly (1) Stator Section, Sensor Assembly (12) and Motor Assembly (9) The stator part; the rotating part includes: wheel rim (2), wheel hub (3), limit sleeve (7), radial decoupling conical magnetic bearing assembly (4) rotor part, Lorentz force magnetic bearing assembly (1) Rotor part and motor assembly (9) For the rotor part, the mandrel (5) is located in the center of the wheel body and fixed on the adapter plate (10), and the mandrel (5) is equipped with a protective bearing (6) and a shaft sleeve (13) , the radial outer side of the protective bearing (6) is the limiting sleeve (7), the protective bearing (6) and the limiting sleeve (7) form a radial protection gap in the radial direction, and form an axial protection gap in the axial direction, limiting The radially outer side of the bit sleeve (7) is the wheel hub (3), the radially outer side of the wheel hub (3) is the rim (2), and the radially outer side of the shaft sleeve (13) is the radial decoupling tapered magnetic bearing assembly ( 4), the radial decoupling tapered magnetic bearing assembly (4) is composed of a stator part and a rotor part, wherein the stator part includes a stator magnetic ring (401), an upper tapered stator (402), a stator magnetic isolation ring (403), axial upper layer coil (404), permanent magnet (405), radial stator (406), radial stator magnetic isolation ring (407), radial coil (408), lower tapered stator (409) and Axial lower layer coil (410), rotor part includes upper conical rotor (411), rotor magnetic conducting ring (412), radial rotor core (413), rotor magnetic isolation ring (414), lower conical rotor (415) , wherein the outer side of the permanent magnet (405) is a radial stator (406), there are two radial stators (406), which are placed orthogonally along the circumferential direction, and there is a radial stator magnetic isolation ring (407) between the two radial stators ), each radial stator is composed of stator teeth (419) and stator magnetic yoke (420), radial coils (408) are wound on the radial stator teeth, and the upper and lower sides of the permanent magnet (405) are is the stator magnetic isolation ring (403), the radial inner side of the permanent magnet (405) and the stator magnetic isolation ring (403) is the stator magnetic conduction ring (401), and the upper and lower ends of the stator magnetic conduction ring (401) are respectively upper cones shaped stator (402) and lower tapered stator (409), the outer side of the radial stator (406) is a radial rotor core (413), and the radial rotor core (413) is between the radial stator (406) and radial rotor core (413). The magnetic air gap (416), the upper and lower sides of the radial rotor core (413) are rotor magnetic isolation rings (414), and the rotor magnetic conduction ring (412) is installed on the radial rotor core (413) and the rotor magnetic isolation ring (414) The radial outer side of the upper conical rotor (411) and the lower conical rotor (415) are connected, the outer side of the upper conical stator (402) is the upper conical rotor (411), and the upper conical rotor (411) is The upper conical air gap (417) is between the stator (402) and the upper conical rotor (411), the lower conical rotor (415) is the outer side of the lower conical stator (409), the lower conical stator (409) and There is a lower conical air gap (418) between the lower conical rotors (415), the upper conical stator (402) and the lower conical stator (409) are full-ring structures along the circumferential direction, and the axial upper coil (404) and the axial lower layer coil (410) are respectively sleeved on the inside of the upper tapered stator (402) and the lower tapered stator (409), and the stator part of the radially decoupled tapered magnetic bearing assembly (4) is fixed on the sleeve (13) The rotor part is installed on the hub (3), the radially outside of the radial decoupling tapered magnetic bearing assembly (4) is the motor assembly (9), the stator part of the motor assembly (9) is connected with the adapter plate (10 ), the rotor part is mounted on the inner side of the hub (3), the radially outer side of the motor assembly (9) is the sensor assembly (12), and the sensor assembly (12) is located on the hub (3) and the rim (2) constituted In the gap, fixed on the base (11), the radially outer side of the sensor assembly (12) is the Lorentz force magnetic bearing assembly (1), and the Lorentz force magnetic bearing assembly (1) consists of an outer rotor, an inner Composed of rotor and stator, the outer rotor is composed of outer magnetic ring (101), outer magnetic steel one (102), outer magnetic steel two (115), outer spacer ring (103) and outer pressure ring (104). The magnetic ring (101) is located at the radial outside of the outer magnetic steel one (102), the outer spacer ring (103) and the outer magnetic steel two (115), and the outer spacer ring (103) is located at the outer magnetic steel one (102) and the outer magnetic steel In the axial middle of the steel two (115), the outer pressure ring (104) is located under the axial direction of the outer magnetic steel two (115) of the outer magnetic ring (101), and the inner rotor is composed of the inner magnetic ring (105), the inner magnetic steel One (106), inner magnetic steel two (116), inner spacer ring (107) and inner magnetic ring lock nut (108), wherein inner magnetic steel one (106), inner spacer ring (107) and inner magnetic steel The second (116) is located on the radially outer side of the inner magnetic ring (105), the inner spacer ring (107) is located in the axial middle of the inner magnetic steel one (106) and the inner magnetic steel two (116), and the inner magnetic ring lock nut (108) is located axially below the inner magnetic ring (105) and the second inner magnetic steel (116). The stator is composed of the stator frame (109) and the stator outer coils (110, 111, 112, 113). The stator is located in the inner rotor In the gap with the outer rotor, the stator part of the Lorentz force magnetic bearing assembly (1) is installed on the base (11), the rotor part is installed on the wheel rim (2), and the sealing cover (8) is installed on the base (11) , the base (11) is at the very bottom of the flywheel. 2. A high-torque maglev flywheel according to claim 1, characterized in that: the sensor assembly (12) has 4 orthogonally placed axial probes and 4 orthogonally placed radial probes, wherein The axial probes are respectively placed along the +y, +x, -y and -x directions. The axial probes complete the detection of the axial translational displacement of the rotor, and calculate two radial rotational displacements through the detected axial translational displacement. Radial probes and axial probes are evenly arranged on the circumference, and 4 radial probes and 4 axial probes are placed at 45 degrees respectively. The radial probes complete the detection of two radial translational displacements of the rotor.

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