CN115589089A

CN115589089A - Magnetic suspension disk type motor

Info

Publication number: CN115589089A
Application number: CN202211498236.3A
Authority: CN
Inventors: 李永胜; 王献忠; 李致宇; 张婕妤; 王维林; 何小宏; 张海刚
Original assignee: Shandong Tianrui Heavy Industry Co Ltd
Current assignee: Shandong Tianrui Heavy Industry Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-01-10
Anticipated expiration: 2042-11-28
Also published as: CN115589089B

Abstract

The invention discloses a magnetic suspension disk type motor, and relates to the technical field of magnetic suspension motors. Wherein, the rotor shaft is arranged on the motor shell in a penetrating way; the rotor disc comprises a shaft sleeve and a disc body arranged on the radial outer side of the shaft sleeve, and the shaft sleeve is sleeved on the rotor shaft; the stator winding is arranged on the motor shell through the stator mounting part; the permanent magnet is arranged on the disk body and is opposite to the stator winding; the axial magnetic suspension bearing is arranged on the motor shell or the stator mounting part and is opposite to the disc body; the radial magnetic suspension bearings are positioned on the two axial sides of the shaft sleeve, and the rotor shaft penetrates through the radial magnetic suspension bearings. Therefore, the rotor disc is suspended by arranging the radial magnetic suspension bearing and the axial magnetic suspension bearing, and the rotating speed, the service life and the output efficiency of the whole magnetic suspension disc type motor are improved while mechanical abrasion is avoided.

Description

Magnetic suspension disk type motor

Technical Field

The invention relates to the technical field of magnetic suspension motors, in particular to a magnetic suspension disc type motor.

Background

With the continuous progress of the manufacturing technology of the magnetic suspension motor, the magnetic suspension motor has higher requirements, such as small volume, light weight, high efficiency, low-speed large torque, high-speed constant power, wide speed regulation range and the like, and the magnetic suspension bearing of the motor has more requirements on installation and performance.

Disclosure of Invention

In order to solve the technical problem, the invention provides a magnetic suspension disk type motor.

The invention provides a magnetic suspension disk type motor, which comprises:

a motor housing;

the rotor shaft penetrates through the motor shell;

the rotor disc comprises a shaft sleeve and a disc body arranged on the radial outer side of the shaft sleeve, and the shaft sleeve is sleeved on the rotor shaft;

the stator winding is arranged on the motor shell through the stator mounting part;

the permanent magnet is arranged on the disk body and is opposite to the stator winding;

the axial magnetic suspension bearing is arranged on the motor shell or the stator mounting part and is opposite to the disc body;

and the radial magnetic suspension bearings are positioned on the two axial sides of the shaft sleeve, and the rotor shaft penetrates through the radial magnetic suspension bearings.

Wherein, the motor casing is including the first half shell and the second half shell that dock mutually, and the first face of first half shell docks with the second face of second half shell, is provided with first tubular structure on the lateral wall of first half shell, is provided with second tubular structure on the lateral wall of second half shell, and the axial magnetic suspension bearing that is located the axial both sides of rotor dish is installed respectively on the terminal surface of first tubular structure and second tubular structure.

Wherein, magnetic suspension disk motor still includes:

and the protective bearings are positioned on two axial sides of the shaft sleeve and are used for carrying out axial protection and radial protection on the rotor shaft.

The protective bearings positioned on the two axial sides of the shaft sleeve are respectively arranged on the inner surfaces of the first cylindrical structure and the second cylindrical structure;

the rotor shaft is a stepped shaft, and the inner end face of the protection bearing is opposite to the stepped face on the stepped shaft;

the clearance between the protection bearing and the rotor shaft is smaller than the clearance between the radial magnetic suspension bearing and the rotor shaft;

the clearance between the end face of the protection bearing and the opposite stepped face is smaller than the clearance between the axial magnetic suspension bearing and the disc body.

The radial magnetic suspension bearings positioned on the two axial sides of the shaft sleeve are respectively arranged on the inner surfaces of the first cylindrical structure and the second cylindrical structure;

the outer ports of the first cylindrical structure and the second cylindrical structure are provided with glands;

the protective bearing is positioned on one side of the radial magnetic suspension bearing, which is far away from the rotor disc, and the gland presses the protective bearing on the motor shell; alternatively, the first and second liquid crystal display panels may be,

the radial magnetic suspension bearing is positioned on one side of the protection bearing, which is far away from the rotor disc, and the gland presses the radial magnetic suspension bearing on the motor shell.

The outer ports of the first cylindrical structure and the second cylindrical structure are provided with pressing covers, and the radial magnetic suspension bearing is mounted on the pressing covers.

The stator windings comprise two groups which are respectively positioned on two axial sides of the disc body; alternatively, the first and second liquid crystal display panels may be,

the stator winding comprises a group of windings positioned on one side of the disc body;

when the stator windings comprise two groups, the first tubular structure and the second tubular structure are arranged in a protruding mode towards the inner side of the motor shell, one group of stator windings are located in a space formed by the first tubular structure and the surrounding wall of the first half shell in a surrounding mode, and the other group of stator windings are located in a space formed by the second tubular structure and the surrounding wall of the second half shell in a surrounding mode;

when stator winding includes a set of, first tubular structure sets up to the outside protrusion of motor casing, and the second tubular structure sets up to the inboard protrusion of motor casing, and stator winding is located the perisporium of second tubular structure and second half shell and encloses the space that closes the formation.

The magnetic suspension disc type motor further comprises a stator inner ring and a stator outer ring, the stator winding is clamped between the stator inner ring and the stator outer ring, and the stator inner ring and the stator outer ring are pressed in the motor shell.

The rotor disks are respectively positioned on two sides of the stator winding, the stator mounting part is clamped between the first half shell and the second half shell and extends to the space between the two rotor disks, and the axial magnetic suspension bearings are respectively mounted on two sides of the stator mounting part.

Wherein, magnetic suspension disk motor still includes:

and the displacement sensors are arranged on two axial sides of the shaft sleeve.

Has the advantages that: the magnetic suspension disk type motor comprises a motor shell, a rotor shaft, a rotor disk, a stator winding, a permanent magnet, an axial magnetic suspension bearing and a radial magnetic suspension bearing. Wherein, the motor casing is worn to locate by the rotor shaft, the rotor dish includes the axle sleeve and sets up in the disk body in the radial outside of axle sleeve, the axle sleeve cover is located on the rotor shaft, stator winding passes through the stator installation department and installs on the motor casing, the permanent magnet sets up on the disk body, and set up relatively with stator winding, axial magnetic suspension bearing installs on the motor casing or installs on the stator installation department, and axial magnetic suspension bearing sets up relatively with the disk body, thus, in order to realize the installation of axial magnetic suspension bearing, when guaranteeing that the installation is convenient with the dismantlement, space utilization in the motor casing has been improved greatly. In addition, by arranging the radial magnetic suspension bearing and the axial magnetic suspension bearing, the rotor disc is suspended under the action of magnetic force, so that the rotating speed, the service life and the output efficiency of the whole magnetic suspension disc type motor are improved while mechanical abrasion is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a magnetic levitation disc type motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a magnetic levitation disk type motor according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a magnetic levitation disc type motor according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of a magnetic levitation disk type motor according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of a magnetic levitation disk type motor according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a magnetic levitation disk type motor according to a sixth embodiment of the present invention;

fig. 7 is a schematic structural diagram of a magnetic suspension disk motor according to a seventh embodiment of the present invention.

The drawings are numbered as follows:

100. a motor housing; 110. a first half shell; 111. a first cylindrical structure; 120. a second half shell; 121. a second cylindrical structure; 130. a gland; 200. a rotor shaft; 300. a rotor disk; 310. a tray body; 320. a shaft sleeve; 330. a permanent magnet; 400. an axial magnetic suspension bearing; 500. a radial magnetic suspension bearing; 600. protecting the bearing; 700. a stator winding; 710. a stator outer ring; 720. a stator inner ring; 730. an armature winding; 800. and a displacement sensor.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

Embodiments of the present invention are further described below with reference to fig. 1 to 7.

Referring to fig. 1 to 7, an exemplary embodiment of the present invention provides a magnetic levitation disk type motor including a motor case 100, a rotor shaft 200, a rotor disk 300, a stator winding 700, a permanent magnet 330, an axial magnetic levitation bearing 400, and a radial magnetic levitation bearing 500. Wherein, the rotor shaft 200 is arranged through the motor casing 100; the rotor disc 300 includes a shaft sleeve 320 and a disc body 310 disposed on a radial outer side of the shaft sleeve 320, wherein the shaft sleeve 320 is sleeved on the rotor shaft 200; the permanent magnet 330 is disposed on the disk body 310 and opposite to the stator winding 700; the axial magnetic suspension bearing 400 is arranged opposite to the disc body 310; the radial magnetic bearings 500 are located on both axial sides of the shaft sleeve 320, and the rotor shaft 200 penetrates through the radial magnetic bearings 500.

In this embodiment, the axial magnetic suspension bearing 400 is disposed opposite to the rotor disc 300, and when the magnetic suspension disc type motor is operated, the axial magnetic suspension bearing 400 generates a non-contact controllable electromagnetic force, which is used for controlling the axial position of the rotor disc 300 in the motor casing 100, so that no mechanical contact is generated between the axial magnetic suspension bearing 400 and the rotor disc 300. Meanwhile, the radial magnetic suspension bearing 500 is used to suspend the rotor shaft 200, thereby controlling the radial position of the rotor disc 300 within the motor casing 100.

The magnetic suspension disc type motor provided by the embodiment combines the magnetic suspension technology with the disc type motor, because the magnetic field direction of the disc type motor is parallel to the rotating shaft, the magnetic field runs away from the axial direction, not only the magnetic energy density is large, but also the space for exchanging energy is large, therefore, the torque density of the motor is greatly improved compared with the radial magnetic field, and the rotor shaft 200 is in a suspension state in the working process through the cooperation of the axial magnetic suspension bearing 400 and the radial magnetic suspension bearing 500, no mechanical contact and mechanical abrasion exist, the power density is high, thereby the magnetic suspension disc type motor has high output efficiency, high rotating speed and long service life, and the magnetic suspension disc type motor can be widely applied to various scenes with high requirements on efficiency. For example, the magnetic suspension disk type motor provided by the embodiment can be applied to driving or power generation of a new energy automobile.

The number of the rotor disks 300, the number of the stator windings 700, the number of the permanent magnets 330, and the positions of the axial magnetic suspension bearing 400 and the radial magnetic suspension bearing 500 are not limited, as long as the suspension of the rotor shaft 200 can be realized by the cooperation of the axial magnetic suspension bearing 400 and the radial magnetic suspension bearing 500, and the reliable operation of the rotor shaft 200 can be realized by the cooperation of the stator windings 700 and the permanent magnets 330.

Various embodiments of the present disclosure are described below with reference to the accompanying drawings.

Example one

Fig. 1 shows a schematic structural diagram of a double-stator single-rotor maglev disk motor, which includes a motor casing 100, a rotor shaft 200, a rotor disk 300, a stator winding 700, permanent magnets 330, an axial maglev bearing 400, and a radial maglev bearing 500, as shown in fig. 1.

The motor casing 100 includes the first half-shell 110 and the second half-shell 120 that dock mutually, the first face of first half-shell 110 docks with the second face of second half-shell 120, be provided with first tubular structure 111 on the lateral wall of first half-shell 110, be provided with second tubular structure 121 on the lateral wall of second half-shell 120, rotor shaft 200 runs through first tubular structure 111 and second tubular structure 121, the outer port of first tubular structure 111 and the outer port of second tubular structure 121 all fix and are provided with gland 130.

The magnetic suspension disk motor may be a single-side output, such as a left-side output or a right-side output as shown in fig. 1, and when the magnetic suspension disk motor is a left-side output, its output shaft extends through the left-side gland 130, and when the magnetic suspension disk motor is a right-side output, its output shaft extends through the right-side gland 130. The magnetic suspension disk motor may also be a double-side output motor, in which the left output shaft extends through the left gland 130, and the right output shaft extends through the right gland 130. The output shaft extension can adopt structural forms such as splines, flanges and the like according to interface requirements, and can be connected with structures such as a planetary gear reducer, a cycloidal pin gear reducer and a spline hole without axial force according to actual requirements.

First tubular structure 111 and second tubular structure 121 all extend to the inboard of motor casing 100, so, first tubular structure 111 encloses the accommodation space that forms left side stator winding 700 with the lateral wall of motor casing 100, and second tubular structure 121 encloses the accommodation space that forms right side stator winding 700 with the lateral wall of motor casing 100.

The stator winding 700 includes a core and an armature winding 730, and the armature winding 730 is used for input and output of motor current. The back of the iron core of the stator winding 700 is welded after being wound and molded, so that the coil stripping is prevented. With continued reference to fig. 1, the maglev disc motor further comprises a stator outer ring 710 and a stator inner ring 720, the stator outer ring 710 being located outside the stator windings 700 and the stator inner ring being located inside the stator windings 700. The stator outer ring 710 and the stator inner ring 720 can be made of aluminum alloy and other materials with good processing performance, after the iron core of the stator winding 700 is welded, the stator outer ring 710 and the stator inner ring 720 are respectively pressed at two ends of the stator winding 700 and can be formed through a turning process, so that the stator winding 700, the stator outer ring 710 and the stator inner ring 720 form an assembly, and finally the assembly is pressed into the motor casing 100 and can be further fixedly connected with the motor casing 100 through fasteners such as screws. The stator outer ring 710 and the stator inner ring 720 constitute a stator mounting portion for mounting the stator winding 700 in the motor case 100, and in addition, the center position of the stator winding 700 can be adjusted by providing the stator outer ring 710 and the stator inner ring 720, so as to ensure the accuracy of the relative position between the stator winding 700 and the permanent magnet 330.

With continued reference to fig. 1, the rotor disc 300 includes a shaft sleeve 320 sleeved on the rotor shaft 200 and a disc body 310 disposed on the shaft sleeve 320, the disc body 310 is located between the stator windings 700 on two sides, and the permanent magnets 330 are disposed on two sides of the disc body 310 and are respectively disposed opposite to the stator windings 700 on the same side. In this way, the rotor shaft 200 can operate under the combined action of the stator windings 700 on both sides, thereby improving the output efficiency of the motor while ensuring the compactness.

The two axial magnetic suspension bearings 400 are respectively located at two axial sides of the disc body 310, and the axial suspension position of the rotor disc 300 is controlled by the magnetic force of the axial magnetic suspension bearings 400 at the two axial sides, so that the axial magnetic suspension bearings 400 and the rotor disc 300 are free from contact and mechanical wear, the service life of the motor is prolonged, and the rotating speed and the output efficiency of the motor are improved. The axial magnetic bearings 400 may be directly mounted to the motor casing 100, or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 1, two axial magnetic bearings 400 are respectively mounted on the inner end surfaces of the first cylindrical structure 111 and the second cylindrical structure 121, so that the motor structure is simpler and more compact, and the relative position between the axial magnetic bearings 400 and the rotor disc 300 is precisely controlled.

The two radial magnetic suspension bearings 500 are respectively located at two axial sides of the shaft sleeve 320, and the magnetic force of the radial magnetic suspension bearings 500 at the two axial sides controls the radial suspension position of the rotor disc 300, so that the radial magnetic suspension bearings 500 and the rotor shaft 200 are free of contact and mechanical wear, the service life of the motor is prolonged, and the rotating speed and the output efficiency of the motor are improved. The radial magnetic bearings 500 may be directly mounted to the motor casing 100 or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 1, two radial magnetic bearings 500 are respectively mounted on the inner surfaces of the first cylindrical structure 111 and the second cylindrical structure 121, so that the motor structure is simpler and more compact, and the radial distance between the radial magnetic bearings 500 and the rotor shaft 200 is precisely controlled.

The radial magnetic suspension bearing 500 can be located at any axial position of the first cylindrical structure 111 and the second cylindrical structure 121, and in the embodiment shown in fig. 1, the radial magnetic suspension bearing 500 is located at a position close to the outer port of the first cylindrical structure 111 and the second cylindrical structure 121, respectively, and is mounted on the glands 130 at both sides.

Further, the magnetic suspension disk motor provided by the present embodiment further includes a protection bearing 600, the protection bearing 600 is located at both axial sides of the shaft sleeve 320, and the rotor shaft 200 is axially and radially protected by the protection bearing 600, so that in case that the axial magnetic suspension bearing 400 and the radial magnetic suspension bearing 500 do not work or fail for some reason, the rotor disk 300 is prevented from impacting other structures in the radial and axial directions thereof.

The protection bearings 600 may be directly mounted on the motor casing 100 or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 1, two protection bearings 600 are respectively mounted on the inner surfaces of the first cylindrical structure 111 and the second cylindrical structure 121. Rotor shaft 200 is the stepped shaft, specifically, the rotor shaft includes the middle shaft section, be located the first shaft section of middle shaft section axial both sides and be located two second shaft sections of rotor shaft outside, the middle shaft section, the first shaft section, the diameter of second shaft section reduces in proper order, thereby form the ladder face between middle shaft section and first shaft section, the axle sleeve 320 cover of rotor dish 300 is located on the middle shaft section, protection bearing 600 cover is established at the first shaft section, radial magnetic suspension bearing 500 covers is established at the second shaft section, make protection bearing 600's interior terminal surface relative with the ladder face. The clearance between the protection bearing 600 and the rotor shaft 200 is smaller than the clearance between the radial magnetic bearing 500 and the rotor shaft 200, and the clearance between the protection bearing 600 and the opposite stepped surface is smaller than the clearance between the axial magnetic bearing 400 and the disk body 310.

When the rotor disc 300 is unstable and shakes in the axial direction, the gap between the protection bearing 600 and the opposite stepped surface is smaller than the gap between the axial magnetic suspension bearing 400 and the disc body 310, so that the stepped surface on the rotor shaft 200 can contact the protection bearing 600 without damaging the axial magnetic suspension bearing 400; when the rotor disc 300 shakes in the radial direction due to instability or stopping of the motor, the rotor shaft 200 may contact the protection bearing 600 without damaging the radial magnetic bearing 500 because the gap between the protection bearing 600 and the rotor shaft 200 is smaller than the gap between the radial magnetic bearing 500 and the rotor shaft 200.

Further, as shown in fig. 1, the magnetic levitation disk type motor provided in the present embodiment further includes a displacement sensor 800, and the radial and axial displacements of the rotor shaft 200 are detected by the displacement sensor 800, so as to adjust the magnetic forces generated by the axial magnetic levitation bearing 400 and the radial magnetic levitation bearing 500 according to the detection result of the displacement sensor 800, so as to ensure that the rotor shaft 200 is always in a levitation state in the axial and radial directions. The displacement sensor 800 may be disposed between the radial magnetic bearing 500 and the protection bearing 600, or may be disposed at other positions that can conveniently detect the displacement of the rotor shaft 200, such as at the outer side of the radial magnetic bearing 500 or at the inner side of the protection bearing 600, and in addition, the positions of the radial magnetic bearing 500 and the protection bearing 600 may be interchanged.

The magnetic suspension disk type motor provided by the embodiment can be a permanent magnet synchronous motor, so that the effects of low-speed constant torque and high-speed constant power can be achieved, and the magnetic suspension disk type motor can also be a reluctance motor and other types of motors. The magnetic suspension disc type motor provided by the embodiment can be applied to a new energy automobile to drive or generate electricity, and the magnetic suspension bearing system with the rigidity adjustable along with the working condition is arranged, so that even if the jolt working condition is met, the rotor shaft 200 cannot touch the protection bearing 600, and the performance is greatly improved compared with that of a common disc type motor.

Example two

Fig. 2 shows a schematic structural diagram of a double-stator single-rotor maglev disk motor, which includes a motor casing 100, a rotor shaft 200, a rotor disk 300, a stator winding 700, permanent magnets 330, an axial maglev bearing 400, and a radial maglev bearing 500, as shown in fig. 2.

Unlike the embodiment shown in fig. 1, in the embodiment shown in fig. 2, two radial magnetic bearings 500 are respectively located at positions of the first cylindrical structure 111 and the second cylindrical structure 121 near the outer port, and are directly pressed against the motor casing 100 by the gland 130.

The magnetic suspension disc type motor provided by the embodiment can be applied to a new energy automobile to drive or generate electricity, and the rotor shaft 200 cannot touch the protection bearing 600 even if encountering a bumpy working condition because the magnetic suspension bearing system with the rigidity adjustable along with the working condition is arranged, so that the performance is greatly improved compared with that of a common disc type motor.

EXAMPLE III

Fig. 3 shows a schematic structural diagram of a double-stator single-rotor maglev disk motor, which includes a motor casing 100, a rotor shaft 200, a rotor disk 300, a stator winding 700, permanent magnets 330, an axial maglev bearing 400, and a radial maglev bearing 500, as shown in fig. 3.

Different from the embodiment shown in fig. 1 and 2, in the embodiment shown in fig. 3, the rotor shaft 200 is a stepped shaft, specifically, the rotor shaft 200 includes a middle shaft section, a first shaft section located at two axial sides of the middle shaft section, and two second shaft sections located at the outermost side of the rotor shaft, the diameters of the middle shaft section, the first shaft section, and the second shaft sections are sequentially reduced, so that a stepped surface is formed between the first shaft section and the second shaft sections, the shaft sleeve 320 of the rotor disc 300 is sleeved on the middle shaft section, the radial magnetic suspension bearing 500 is sleeved on the first shaft section, the protection bearing 600 is sleeved on the second shaft sections, so that the inner end surface of the protection bearing 600 is opposite to the stepped surface. The clearance between the protection bearing 600 and the rotor shaft 200 is smaller than the clearance between the radial magnetic bearing 500 and the rotor shaft 200, and the clearance between the protection bearing 600 and the opposite stepped surface is smaller than the clearance between the axial magnetic bearing 400 and the disk body 310.

The magnetic suspension disk type motor provided by the embodiment can be a permanent magnet synchronous motor, so that the effects of low-speed constant torque and high-speed constant power can be achieved, and the magnetic suspension disk type motor can also be a reluctance motor and other types of motors. The magnetic suspension disc type motor provided by the embodiment can be applied to a new energy automobile to drive or generate electricity, and the rotor shaft 200 cannot touch the protection bearing 600 even if encountering a bumpy working condition because the magnetic suspension bearing system with the rigidity adjustable along with the working condition is arranged, so that the performance is greatly improved compared with that of a common disc type motor.

Example four

Fig. 4 shows a schematic structural diagram of a single-stator dual-rotor maglev disk motor, which includes a motor housing 100, a rotor shaft 200, a rotor disk 300, stator windings 700, permanent magnets 330, an axial maglev bearing 400, and a radial maglev bearing 500, as shown in fig. 4.

Motor casing 100 includes the first half shell 110 and the second half shell 120 that dock mutually, the first face of first half shell 110 docks with the second face of second half shell 120, be provided with first tubular structure 111 on the lateral wall of first half shell 110, be provided with second tubular structure 121 on the lateral wall of second half shell 120, rotor shaft 200 runs through first tubular structure 111 and second tubular structure 121, the outer port of first tubular structure 111 and the outer port of second tubular structure 121 all fix and are provided with gland 130.

The magnetic suspension disk type motor can be a single-side output, such as a left-side output or a right-side output shown in fig. 4, and when the magnetic suspension disk type motor is a left-side output, the output shaft thereof extends through the left-side gland 130, and when the magnetic suspension disk type motor is a right-side output, the output shaft thereof extends through the right-side gland 130. The magnetic suspension disk motor may also be a double-side output motor, in which the left output shaft extends through the left gland 130, and the right output shaft extends through the right gland 130. The output shaft extension can adopt structural forms such as splines, flanges and the like according to interface requirements, and can be connected with structures such as a planetary gear reducer, a cycloidal pin gear reducer and a spline hole without axial force according to actual requirements.

The first tubular structure 111 and the second tubular structure 121 both extend to the outside of the motor casing 100, so that the inner end face of the first tubular structure 111 and the inside space of the side wall of the motor casing 100 form an accommodating space of the left rotor disc 300, and the inner end face of the second tubular structure 121 and the inside space of the side wall of the motor casing 100 form an accommodating space of the right rotor disc 300.

The stator winding 700 includes a core and an armature winding 730, and the armature winding 730 is used for input and output of motor current. The back of the iron core of the stator winding 700 is welded after being wound and molded, so that the coil stripping is prevented. With continued reference to fig. 4, the maglev disc motor further comprises a stator outer ring 710 and a stator inner ring 720, the stator outer ring 710 being located outside the core of the stator winding 700 and the stator inner ring 720 being located inside the core of the stator winding 700. The stator outer ring 710 and the stator inner ring 720 may be made of aluminum alloy and other materials with good processability, after the iron core of the stator winding 700 is welded, the stator outer ring 710 and the stator inner ring 720 are respectively press-fitted at two ends of the stator winding 700 and may be formed by a turning process, so that the stator winding 700, the stator outer ring 710 and the stator inner ring 720 form an assembly, and finally the assembly is clamped between the first half shell 110 and the second half shell 120 and may be further fixedly connected to the motor casing 100 by fasteners such as screws. The stator outer ring 710 and the stator inner ring 720 constitute a stator mounting portion for mounting the stator winding 700 in the motor casing 100, and in addition, the center position of the stator winding 700 can be adjusted by providing the stator outer ring 710 and the stator inner ring 720, so as to ensure the accuracy of the relative position between the stator winding 700 and the permanent magnet 330.

With continued reference to fig. 4, two rotor disks 300 are respectively disposed at two sides of the stator winding 700 at the middle position, the rotor disks 300 include a shaft sleeve 320 sleeved on the rotor shaft 200 and a disk body 310 disposed on the shaft sleeve 320, the disk body 310 is respectively disposed at two sides of the stator winding 700 at the middle position, and the inner side of the disk body 310 is disposed with a permanent magnet 330 disposed opposite to the stator winding 700 at the middle position. In this way, the rotor shaft 200 can be operated by the stator winding 700 at the intermediate position, and the output efficiency of the motor can be improved while the compactness is ensured.

The two axial magnetic suspension bearings 400 are respectively located at two axial sides of the stator inner ring 720 and at the inner sides of the two rotor discs 300, and the magnetic force of the axial magnetic suspension bearings 400 respectively controls the axial suspension positions of the two rotor discs 300, so that the axial magnetic suspension bearings 400 and the rotor discs 300 are free from contact and mechanical wear, the service life of the motor is prolonged, and the output efficiency of the motor is improved. The axial magnetic bearings 400 may be directly mounted on the stator winding 700 or may be connected to the stator winding 700 through other structures, for example, as shown in fig. 4, two axial magnetic bearings 400 are respectively mounted on two axial sides of the stator winding 700, so that the structure of the motor is simpler and more compact, and the relative position between the axial magnetic bearings 400 and the rotor disc 300 is precisely controlled.

The two radial magnetic suspension bearings 500 are respectively located at the axial outer sides of the shaft sleeve 320, and the magnetic force of the two radial magnetic suspension bearings 500 at the axial outer sides controls the radial suspension position of the rotor disc 300, so that the radial magnetic suspension bearings 500 and the rotor shaft 200 are in no contact with each other, mechanical abrasion is avoided, the service life of the motor is prolonged, and the output efficiency of the motor is improved. The radial magnetic bearings 500 may be directly mounted to the motor casing 100 or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 4, two radial magnetic bearings 500 are respectively mounted on the inner surfaces of the first cylindrical structure 111 and the second cylindrical structure 121, so that the motor structure is simpler and more compact, and the radial distance between the radial magnetic bearings 500 and the rotor shaft 200 is precisely controlled.

The radial magnetic suspension bearing 500 can be located at any axial position of the first cylindrical structure 111 and the second cylindrical structure 121, and in the embodiment shown in fig. 4, the radial magnetic suspension bearing 500 is located at a position near the inner end surface of the first cylindrical structure 111 and the second cylindrical structure 121, respectively.

Further, the magnetic suspension disk motor provided by the present embodiment further includes a protection bearing 600, the protection bearing 600 is located at the axial outer side of the shaft sleeve 320, and the rotor shaft 200 is axially and radially protected by the protection bearing 600, so that in case that the axial magnetic suspension bearing 400 and the radial magnetic suspension bearing 500 do not work or fail for some reason, the rotor disk 300 is prevented from hitting other structures in the radial and axial directions thereof.

The protection bearings 600 may be directly mounted on the motor casing 100, or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 4, two protection bearings 600 are respectively mounted on the inner surfaces of the first cylindrical structure 111 and the second cylindrical structure 121. Rotor shaft 200 is the stepped shaft, specifically, the rotor shaft includes middle shaft section, be located the first shaft section of middle shaft section axial both sides and be located two second shaft sections of rotor shaft outside, middle shaft section, first shaft section, the diameter of second shaft section reduces in proper order, thereby form the ladder face between first shaft section and second shaft section, the both sides edge of middle shaft section is located respectively to the axle sleeve 320 cover of two rotor discs 300, radial magnetic suspension bearing 500 covers and establishes at first shaft section, protection bearing 600 covers and establishes at the second shaft section, make protection bearing 600's interior terminal surface relative with the ladder face. The clearance between the protection bearing 600 and the rotor shaft 200 is smaller than the clearance between the radial magnetic bearing 500 and the rotor shaft 200, and the clearance between the protection bearing 600 and the opposite stepped surface is smaller than the clearance between the axial magnetic bearing 400 and the disk body 310.

Further, as shown in fig. 4, the magnetic levitation disk type motor provided in the present embodiment further includes a displacement sensor 800, and the radial and axial displacements of the rotor shaft 200 are detected by the displacement sensor 800, so as to adjust the magnetic forces generated by the axial magnetic levitation bearing 400 and the radial magnetic levitation bearing 500 according to the detection result of the displacement sensor 800, so as to ensure that the rotor shaft 200 is always in a levitation state in the axial and radial directions. The displacement sensor 800 may be disposed between the radial magnetic bearing 500 and the protection bearing 600, or may be disposed at other positions that can conveniently detect the displacement of the rotor shaft 200, such as the inner side of the radial magnetic bearing 500 or the outer side of the protection bearing 600, and in addition, the positions of the radial magnetic bearing 500 and the protection bearing 600 may be interchanged.

The magnetic suspension disk type motor provided by the embodiment can be a permanent magnet synchronous motor, so that the effects of low-speed constant torque and high-speed constant power can be achieved, and the magnetic suspension disk type motor can also be a reluctance machine and other types of motors. The magnetic suspension disc type motor provided by the embodiment can be applied to a new energy automobile to drive or generate electricity, and the rotor shaft 200 cannot touch the protection bearing 600 even if encountering a bumpy working condition because the magnetic suspension bearing system with the rigidity adjustable along with the working condition is arranged, so that the performance is greatly improved compared with that of a common disc type motor.

EXAMPLE five

Fig. 5 is a schematic structural diagram of a single-stator double-rotor maglev disc motor, which includes a motor housing 100, a rotor shaft 200, a rotor disc 300, stator windings 700, permanent magnets 330, an axial maglev bearing 400, and a radial maglev bearing 500, as shown in fig. 5.

Different from the embodiment shown in fig. 4, in the embodiment shown in fig. 5, the rotor shaft 200 is a stepped shaft, specifically, the rotor shaft includes a middle shaft section, a first shaft section located at two axial sides of the middle shaft section, and two second shaft sections located at the outermost side of the rotor shaft, the diameters of the middle shaft section, the first shaft section, and the second shaft sections are sequentially reduced, so that a stepped surface is formed between the middle shaft section and the first shaft section, the shaft sleeves 320 of the two rotor disks 300 are respectively sleeved at two side edges of the middle shaft section, the protection bearing 600 is sleeved at the first shaft section, and the radial magnetic suspension bearing 500 is sleeved at the second shaft section, so that the inner end surface of the protection bearing 600 is opposite to the stepped surface. The clearance between the protection bearing 600 and the rotor shaft 200 is smaller than the clearance between the radial magnetic bearing 500 and the rotor shaft 200, and the clearance between the protection bearing 600 and the opposite stepped surface is smaller than the clearance between the axial magnetic bearing 400 and the disk body 310.

Example six

Fig. 6 shows a schematic structure of a single-stator single-rotor magnetic suspension disk motor, which includes a motor casing 100, a rotor shaft 200, a rotor disk 300, a stator winding 700, permanent magnets 330, an axial magnetic suspension bearing 400, and a radial magnetic suspension bearing 500, as shown in fig. 6.

The magnetic suspension disk motor may be a single-sided output, such as a left-sided output or a right-sided output as shown in fig. 6, and when the magnetic suspension disk motor is a left-sided output, its output shaft extends through the left-sided gland 130, and when the magnetic suspension disk motor is a right-sided output, its output shaft extends through the right-sided gland 130. The magnetic suspension disk motor may also be a double-side output motor, in which the left output shaft extends through the left gland 130, and the right output shaft extends through the right gland 130. The output shaft extension can adopt structural forms such as splines, flanges and the like according to interface requirements, and can be connected with structures such as a planetary gear reducer, a cycloidal pin gear reducer and a spline hole without axial force according to actual requirements.

The first tubular structure 111 extends to the outside of the motor casing 100, and the second tubular structure 121 extends to the inside of the motor casing 100, so that the second tubular structure 121 and the side wall of the motor casing 100 enclose the accommodating space of the stator winding 700.

The stator winding 700 includes a core and an armature winding 730, and the armature winding 730 is used for input and output of motor current. The back of the iron core of the stator winding 700 is welded after being wound and molded, so that the coil stripping is prevented. With continued reference to fig. 6, the maglev disc motor further comprises a stator outer ring 710 and a stator inner ring 720, the stator outer ring 710 being located outside the stator windings 700 and the stator inner ring being located inside the stator windings 700. The stator outer ring 710 and the stator inner ring 720 can be made of aluminum alloy and other materials with good processing performance, after the iron core of the stator winding 700 is welded, the stator outer ring 710 and the stator inner ring 720 are respectively pressed at two ends of the stator winding 700 and can be formed through a turning process, so that the iron core of the stator winding 700, the stator outer ring 710 and the stator inner ring 720 form an assembly, and finally the assembly is pressed into the motor casing 100 and can be further fixedly connected with the motor casing 100 through fasteners such as screws. The stator outer ring 710 and the stator inner ring 720 constitute a stator mounting portion for mounting the stator winding 700 in the motor case 100, and in addition, the center position of the stator winding 700 can be adjusted by providing the stator outer ring 710 and the stator inner ring 720, so as to ensure the accuracy of the relative position between the stator winding 700 and the permanent magnet 330.

With continued reference to fig. 6, the rotor disc 300 includes a shaft sleeve 320 sleeved on the rotor shaft 200 and a disc body 310 disposed on the shaft sleeve 320, the disc body 310 is located at the left side of the stator winding 700, and a permanent magnet 330 is disposed at one side of the disc body 310 and is disposed opposite to the stator winding 700 at the right side. In this way, the rotor shaft 200 can be operated by the stator winding 700, and the output efficiency of the motor can be improved while the compactness is ensured.

The two axial magnetic suspension bearings 400 are respectively located at two axial sides of the disc body 310, and the axial suspension position of the rotor disc 300 is controlled by the magnetic force of the axial magnetic suspension bearings 400 at the two axial sides, so that the axial magnetic suspension bearings 400 and the rotor disc 300 are not in contact with each other and are not mechanically abraded, the service life of the motor is prolonged, and the output efficiency of the motor is improved. The axial magnetic bearings 400 may be directly mounted to the motor casing 100, or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 6, two axial magnetic bearings 400 are respectively mounted on the inner end surfaces of the first cylindrical structure 111 and the second cylindrical structure 121, so that the motor structure is simpler and more compact, and the relative position between the axial magnetic bearings 400 and the rotor disc 300 is precisely controlled.

The two radial magnetic suspension bearings 500 are respectively located at two axial sides of the shaft sleeve 320, and the magnetic force of the radial magnetic suspension bearings 500 at the two axial sides controls the radial suspension position of the rotor disc 300, so that the radial magnetic suspension bearings 500 and the rotor shaft 200 are free of contact and mechanical wear, the service life of the motor is prolonged, and the rotating speed and the output efficiency of the motor are improved. The radial magnetic bearings 500 may be directly mounted to the motor casing 100 or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 6, two radial magnetic bearings 500 are respectively mounted on the inner surfaces of the first cylindrical structure 111 and the second cylindrical structure 121, so that the motor structure is simpler and more compact, and the radial distance between the radial magnetic bearings 500 and the rotor shaft 200 is precisely controlled.

The radial magnetic bearings 500 may be located at any axial position of the first cylindrical structure 111 and the second cylindrical structure 121, and in the embodiment shown in fig. 6, the radial magnetic bearings 500 are located at positions near the inner end surfaces of the first cylindrical structure 111 and the second cylindrical structure 121, respectively, and are directly mounted on the motor casing 100.

Further, the magnetic suspension disk motor provided by the embodiment further includes a protection bearing 600, the protection bearing 600 is located at both axial sides of the shaft sleeve 320, and the rotor shaft 200 is axially and radially protected by the protection bearing 600, so that the rotor disk 300 is prevented from impacting the structure at the outer side thereof in the radial and axial directions under the condition that the axial magnetic suspension bearing 400 and the radial magnetic suspension bearing 500 do not work or fail for some reason.

The protection bearings 600 may be directly mounted on the motor casing 100 or may be connected to the motor casing 100 through other structures, for example, as shown in fig. 6, two protection bearings 600 are respectively mounted on the inner surfaces of the first cylindrical structure 111 and the second cylindrical structure 121. Rotor shaft 200 is the stepped shaft, specifically, the rotor shaft includes the middle shaft section, be located the first shaft section of middle shaft section axial both sides and be located two second shaft sections of rotor shaft outside, the middle shaft section, first shaft section, the diameter of second shaft section reduces in proper order, thereby form the ladder face between first shaft section and second shaft section, the middle shaft section is located to the axle sleeve 320 cover of rotor dish 300, radial magnetic suspension bearing 500 cover is established at first shaft section, protection bearing 600 cover is established at the second shaft section, make protection bearing 600's interior terminal surface relative with the ladder face. The gap between the protection bearing 600 and the rotor shaft 200 is smaller than the gap between the radial magnetic bearing 500 and the rotor shaft 200, and the gap between the protection bearing 600 and the opposite stepped surface is smaller than the gap between the axial magnetic bearing 400 and the disc body 310.

Further, as shown in fig. 6, the magnetic levitation disk type motor provided in the present embodiment further includes a displacement sensor 800, and the radial and axial displacements of the rotor shaft 200 are detected by the displacement sensor 800, so as to adjust the magnetic forces generated by the axial magnetic levitation bearing 400 and the radial magnetic levitation bearing 500 according to the detection result of the displacement sensor 800, so as to ensure that the rotor shaft 200 is always in a levitation state in the axial and radial directions. The displacement sensor 800 may be disposed between the radial magnetic bearing 500 and the protection bearing 600, or may be disposed at other positions that can conveniently detect the displacement of the rotor shaft 200, such as the inner side of the radial magnetic bearing 500 or the outer side of the protection bearing 600, and in addition, the positions of the radial magnetic bearing 500 and the protection bearing 600 may be interchanged.

EXAMPLE seven

Fig. 7 is a schematic structural diagram of a single-stator single-rotor magnetic suspension disk motor, which includes a motor casing 100, a rotor shaft 200, a rotor disk 300, a stator winding 700, permanent magnets 330, an axial magnetic suspension bearing 400, and a radial magnetic suspension bearing 500, as shown in fig. 7.

Different from the embodiment shown in fig. 6, in the embodiment shown in fig. 7, the rotor shaft 200 is a stepped shaft, specifically, the rotor shaft includes a middle shaft section, a first shaft section located at two axial sides of the middle shaft section, and two second shaft sections located at the outermost side of the rotor shaft, the diameters of the middle shaft section, the first shaft section, and the second shaft sections are sequentially reduced, so that a stepped surface is formed between the middle shaft section and the first shaft section, the shaft sleeve 320 of the rotor disc 300 is sleeved on the middle shaft section, the protection bearing 600 is sleeved on the first shaft section, and the radial magnetic suspension bearing 500 is sleeved on the second shaft section, so that the inner end surface of the protection bearing 600 is opposite to the stepped surface. The clearance between the protection bearing 600 and the rotor shaft 200 is smaller than the clearance between the radial magnetic bearing 500 and the rotor shaft 200, and the clearance between the protection bearing 600 and the opposite stepped surface is smaller than the clearance between the axial magnetic bearing 400 and the disk body 310.

The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but encompasses equivalent technical means as would be appreciated by those skilled in the art based on the inventive concept.

Claims

1. A magnetically suspended disc motor, comprising:

a motor housing;

the rotor shaft penetrates through the motor shell;

the stator winding is arranged on the motor shell through a stator mounting part;

the permanent magnet is arranged on the disc body and is opposite to the stator winding;

the axial magnetic suspension bearing is mounted on the motor shell or the stator mounting part and is arranged opposite to the disc body;

and the radial magnetic suspension bearings are positioned on two axial sides of the shaft sleeve, and the rotor shaft penetrates through the radial magnetic suspension bearings.

2. The maglev disk motor of claim 1, wherein the motor case comprises a first half shell and a second half shell which are butted, a first face of the first half shell is butted with a second face of the second half shell, a first cylindrical structure is arranged on a side wall of the first half shell, a second cylindrical structure is arranged on a side wall of the second half shell, and the axial maglev bearings located on two axial sides of the rotor disk are respectively mounted on end faces of the first cylindrical structure and the second cylindrical structure.

3. The magnetic levitation disc motor as recited in claim 2, further comprising:

and the protective bearings are positioned on two axial sides of the shaft sleeve and are used for axially and radially protecting the rotor shaft.

4. The magnetic levitation disc motor as recited in claim 3, wherein the protection bearings on both axial sides of the shaft sleeve are mounted on inner surfaces of the first cylindrical structure and the second cylindrical structure, respectively;

the rotor shaft is a stepped shaft, and the inner end face of the protection bearing is opposite to a stepped face on the stepped shaft;

the gap between the end face of the protection bearing and the opposite stepped face is smaller than the gap between the axial magnetic suspension bearing and the disc body.

5. A magnetic levitation disc motor as recited in claim 3, wherein the radial magnetic levitation bearings on both axial sides of the shaft sleeve are mounted on inner surfaces of the first cylindrical structure and the second cylindrical structure, respectively;

the protective bearing is positioned on one side of the radial magnetic suspension bearing, which is far away from the rotor disc, and the gland presses the protective bearing on the motor casing; alternatively, the first and second electrodes may be,

the radial magnetic suspension bearing is positioned on one side of the protection bearing far away from the rotor disc, and the gland presses the radial magnetic suspension bearing on the motor shell.

6. The magnetic levitation disc motor as recited in claim 2, wherein the outer ports of the first and second cylindrical structures are each provided with a gland, the radial magnetic levitation bearing being mounted on the gland.

7. The magnetic levitation disc motor as recited in claim 2, wherein the stator windings comprise two groups, one on each axial side of the disc; alternatively, the first and second electrodes may be,

when the stator windings comprise two groups, the first tubular structure and the second tubular structure are arranged in a protruding mode towards the inner side of the motor shell, one group of the stator windings are located in a space formed by the first tubular structure and the peripheral wall of the first half shell in a surrounding mode, and the other group of the stator windings are located in a space formed by the second tubular structure and the peripheral wall of the second half shell in a surrounding mode;

when the stator winding includes a set of, first tubular structure to the outside protrusion setting of motor casing, second tubular structure to the inboard protrusion setting of motor casing, the stator winding is located second tubular structure with the perisporium of second half shell encloses the space that closes formation.

8. The magnetic levitation disc type motor as recited in claim 7, further comprising an inner stator ring and an outer stator ring, wherein the stator winding is sandwiched between the inner stator ring and the outer stator ring, and the inner stator ring and the outer stator ring are press-fitted into the motor casing.

9. The maglev disc motor of claim 2, wherein the rotor discs comprise two, the two rotor discs are respectively located at two sides of the stator winding, the stator mounting part is sandwiched between the first half shell and the second half shell and extends to between the two rotor discs, and the axial maglev bearings are respectively mounted at two sides of the stator mounting part.

10. The magnetic levitation disc motor as recited in any one of claims 1 to 9, further comprising: