Motor device with built-in annular magnetic track power

Abstract

The invention discloses a motor device with built-in annular magnetic track power. The motor device comprises a machine shell, an annular magnetic track and a magnetic track car. A rotor assembly and a stator assembly which form a core electric energy-mechanical energy conversion mechanism are arranged in an inner cavity of the machine shell, a rotating shaft is axially arranged in the center of the rotor assembly and supported in the inner cavity of the machine shell, and at least one end of the rotating shaft extends out of the machine shell to form a power input end or a power output end. The annular magnetic track is fixed to the inner wall face of the machine shell in a closed ring shape and arranged on the radial outer side of the rotating shaft in a surrounding mode. The magnetic rail car is supported on the annular magnetic rail through a support, forms torque transmission connection with the rotating shaft and can move circumferentially along the annular magnetic rail under the driving of a magnetic field of the annular magnetic rail. The energy-saving performance is improved in a breakthrough mode, the structure is simple, manufacturing is convenient, the annular magnetic track and the stator assembly share the radial space of the inner cavity of the machine shell, power transmission path integration is achieved through the support of the magnetic track car, and the axial size of the whole machine is small.

Description

Technical Field

[0001] The present invention relates to the technical field of motor devices, and in particular, to a motor device with an internal ring-shaped magnetic track power source. Background Art

[0002] Motor devices can be divided into electric motors and generators. Electric motors convert electrical energy into mechanical energy, and generators convert mechanical energy into electrical energy. The structures of current electric motors and generators are already very mature, and energy conservation has become a development direction for electric motors and generators. Therefore, the present invention provides a motor device with an internal ring-shaped magnetic track power source. Summary of the Invention

[0003] The object of the present invention is to provide a motor device with an internal ring-shaped magnetic track power source.

[0004] A motor device with an internal ring-shaped magnetic track power source provided by the present invention includes a housing, a ring-shaped magnetic track, and a magnetic track vehicle; a rotor assembly and a stator assembly that constitute a core electrical energy-mechanical energy conversion mechanism are arranged in the inner cavity of the housing. A rotating shaft is axially arranged at the center of the rotor assembly. The rotating shaft is supported in the inner cavity of the housing, and at least one end of the rotating shaft extends to the outside of the housing to form a power input end or a power output end; the ring-shaped magnetic track is fixedly arranged in a closed ring shape on the inner wall surface of the housing and is arranged around the outside of the radial direction of the rotating shaft; the magnetic track vehicle is supported on the ring-shaped magnetic track by a bracket and is torque-transmittingly connected to the rotating shaft, and can move circumferentially along the ring-shaped magnetic track under the drive of the magnetic field of the ring-shaped magnetic track.

[0005] In some embodiments, the center distance between the magnetic track vehicle and the rotating shaft is greater than the radius of the rotor assembly.

[0006] In some embodiments, the bracket is a disc, a shaft hole is provided at the center of the disc, the shaft hole is in interference fit with the shaft shoulder of the rotating shaft, and the magnetic track vehicle is fixed to the outer edge of the disc.

[0007] In some embodiments, a clamping flange is provided on the outer periphery of the ring-shaped magnetic track, and the clamping flange is clamped and fixed to the positioning groove on the inner wall surface of the housing.

[0008] In some embodiments, the annular magnetic track includes a first magnetic track side portion and a second magnetic track side portion. Both of the magnetic track side portions extend circumferentially along the rotation axis and form a radial gap with an opening facing the axis in the radial direction. A first permanent magnet array is embedded in the inner working surface of the first magnetic track side portion, and a second permanent magnet array is embedded in the inner working surface of the second magnetic track side portion. The magnetic pole directions of both the first permanent magnet array and the second permanent magnet array are axial. The magnetic track vehicle includes an insertion portion, a third permanent magnet array, and a fourth permanent magnet array. The insertion portion extends into the radial gap. The third permanent magnet array is disposed on the first axial side of the insertion portion, forms an axial spacing with the first permanent magnet array, and constitutes a first magnetic circuit channel. The fourth permanent magnet array is disposed on the second axial side of the insertion portion, forms an axial spacing with the second permanent magnet array, and constitutes a second magnetic circuit channel.

[0009] In some embodiments, the stator assembly is disposed on the outer periphery of the rotor assembly; the annular magnetic tracks and the magnetic track vehicles are provided at both ends of the stator assembly.

[0010] In some embodiments, the motor device is a generator; the end of the rotation axis extending outside the housing forms a power input end, which provides a first power for the start and continuous rotation of the rotor assembly; the annular magnetic track and the magnetic track vehicle form a magnetic force assisted traction device, which provides a second power for the continuous rotation of the rotor assembly.

[0011] In some embodiments, the motor device is a motor; the stator assembly provides a third power for the start and continuous rotation of the rotor assembly; the annular magnetic track and the magnetic track vehicle form a magnetic force assisted traction device, which provides a second power for the continuous rotation of the rotor assembly.

[0012] In some embodiments, the rotation axis is supported in the inner cavity of the housing by a magnetic levitation device. The magnetic levitation device includes a magnetic levitation bearing, a position sensor, and a controller. The position sensor is fixed to the inner wall surface of the housing and is used to obtain the position data of the rotor assembly. The controller is communicatively connected to the position sensor and the magnetic levitation bearing, and is used to receive the position data from the position sensor, generate magnetic force control data based on the position data, and send the magnetic force control data to the magnetic levitation bearing to form a closed-loop control.

[0013] In some embodiments, the magnetic levitation bearing is a five-degree-of-freedom magnetic levitation bearing, and the five degrees of freedom include translational motion in the radial X-axis, translational motion in the radial Y-axis, translational motion in the axial Z-axis, tilt angle displacement control about the X-axis, and tilt angle displacement control about the Y-axis.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] The energy-saving performance has achieved a breakthrough improvement. An internal ring-shaped magnetic track power mechanism is built in, which converts magnetic field energy into mechanical rotational force, provides additional direct driving force for the rotor assembly, forms a resultant force drive with the external power, reduces the dependence on external energy, and the energy-saving performance has achieved a breakthrough improvement.

[0016] The structure is simple and convenient for manufacturing. An internal ring-shaped magnetic track power mechanism is composed of a ring-shaped magnetic track and a magnetic track vehicle. Among them, the ring-shaped magnetic track is fixedly arranged on the inner wall surface of the casing in a closed ring shape and is arranged around the radial outside of the rotating shaft. The magnetic track vehicle is supported on the ring-shaped magnetic track by a bracket and forms a torque transmission connection with the rotating shaft. Driven by the magnetic field of the ring-shaped magnetic track, it can move circumferentially along the ring-shaped magnetic track, making the structure of the internal magnetic track power mechanism simple, and the combination with the casing and the rotating shaft is simple, thus being convenient for manufacturing.

[0017] The ring-shaped magnetic track and the stator assembly share the radial space of the inner cavity of the casing, and the power transmission path is integrated through the bracket of the magnetic track vehicle, making the overall axial dimension of the machine smaller. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the generator in Embodiment 1;

[0019] Figure 2 It is a schematic cross-sectional diagram of the ring-shaped magnetic track and the magnetic track vehicle;

[0020] Figure 3 It is an example of the magnet arrangement of the magnetic track and the magnetic track vehicle;

[0021] Figure 4 It is a schematic structural diagram of the power generation device in Embodiment 2;

[0022] Figure 5 It is a schematic structural diagram of the power generation device in Embodiment 3; Description of the Drawings:

[0024] 1. Rotating shaft; 2. Magnetic suspension bearing; 3. Bracket; 4. Magnetic track vehicle; 5. Ring-shaped magnetic track; 6. Rotor assembly; 7. Stator assembly; 8. Casing; 41. Axial first side; 42. Axial second side; 43. Insertion part; 51. First magnetic track side part; 52. Second magnetic track side part; 53. Radial gap; A1. Axial; A2. Radial; A3. Circumferential; Z1. First permanent magnet array; Z2. Second permanent magnet array; Z3. Third permanent magnet array; Z4. Fourth permanent magnet array; C1. First magnetic circuit channel; C2. Second magnetic circuit channel. Detailed Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, then such descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection sought by the present invention.

[0028] Embodiment 1: Generator with Built-in Ring Magnetic Track Power

[0029] As Figure 1 shown, this generator includes a machine shell 8, a ring magnetic track 5, and a magnetic track vehicle 4.

[0030] A rotor assembly 6 and a stator assembly 7 are arranged in the inner cavity of the machine shell 8. The stator assembly 7 is fixed to the inner wall surface of the machine shell 8. The rotor assembly 6 is rotatably arranged in the inner cavity of the stator assembly 7. The stator assembly 7 and the rotor assembly 6 constitute the core electric energy - mechanical energy conversion mechanism. A rotating shaft 1 is axially arranged at the center of the rotor assembly 6. The rotating shaft 1 is supported in the inner cavity of the machine shell 8 through a magnetic levitation device. One end of the rotating shaft 1 extends to the outside of the machine shell 8 to form a power input end.

[0031] The ring magnetic track 5 is in a closed ring shape. The ring magnetic track 5 is fixed to the inner wall surface of the machine shell 8 and is arranged around the radial outside of the rotating shaft 1. The ring magnetic track 5 is arranged on the axial right side of the stator assembly 7.

[0032] The magnetic track vehicle 4 is supported on the ring magnetic track 5 by a bracket 3 and forms a torque transmission connection with the rotating shaft 1, and can perform circumferential movement along the ring magnetic track 5 under the drive of the magnetic field of the ring magnetic track 5.

[0033] The magnetic track vehicle 4 and the annular magnetic track 5 together form an internal annular magnetic track power mechanism. Among them, the annular magnetic track 5 is a magnetic force traction component, and the magnetic track vehicle 4 is a magnetic force powered moving component.

[0034] In this embodiment, by setting the center distance between the magnetic track vehicle 4 and the rotating shaft 1 to be greater than the radius of the rotor assembly 6 in a special configuration, based on the physical principle of the torque formula M = F·r, under the action of the same magnetic driving force, the length of the magnetic force acting arm is effectively extended. This design innovation significantly improves the output torque of the internal annular magnetic track power mechanism, and the torque gain amplitude can reach ΔM = Δr×F, where Δr is the increased length of the acting arm.

[0035] In this embodiment, a disc bracket 3 is used to achieve dual-functional coupling. A shaft hole is provided at the center of the disc and is in interference fit with the shaft shoulder of the rotating shaft 1, and the magnetic track vehicle 4 is fixed to the outer edge of the disc. Using the disc bracket 3 is beneficial to maintaining the rotational balance of the rotating shaft 1. The disc is preferably formed of an aluminum alloy material, and it is also preferably provided with holes on the disc to reduce the weight of the disc itself.

[0036] As a preferred method, a clamping flange is provided on the outer periphery of the annular magnetic track 5, and a positioning groove is provided on the inner wall surface of the housing 8. The annular magnetic track 5 is fixed to the inner wall surface of the housing 8 by clamping the clamping flange with the positioning groove on the inner wall surface of the housing 8. This modular structure can improve the installation efficiency of the annular magnetic track 5 in the housing 8.

[0037] Figure 2 Schematically shows the cross-section of the annular magnetic track 5 and the magnetic track vehicle 4, Figure 3 Schematically shows the magnet arrangement thereon. Among them, the arrow A1 represents the axial direction of the rotating shaft, the arrow A2 represents the radial direction of the rotating shaft, and the arrow A3 represents the circumferential direction of the rotating shaft.

[0038] Combined with Figure 2 and Figure 3, in this embodiment, the annular magnetic track 5 includes a first magnetic track side portion 51 and a second magnetic track side portion 52. Both the first magnetic track side portion 51 and the second magnetic track side portion 52 extend circumferentially along the rotation axis 1 in the A3 direction and form a radial gap 53 with an opening facing the axis in the A2 direction. The inner working surface of the first magnetic track side portion 51 is embedded with a first permanent magnet array Z1, and the inner working surface of the second magnetic track side portion 52 is embedded with a second permanent magnet array Z2. The magnetic pole directions of both the first permanent magnet array Z1 and the second permanent magnet array Z2 are in the A1 direction; the magnetic track vehicle 4 includes an insertion portion 43, a third permanent magnet array Z3, and a fourth permanent magnet array Z4. The insertion portion 43 extends into the radial gap 53 on the annular magnetic track 5. The third permanent magnet array Z3 is arranged on the first axial side 41 of the insertion portion 43, forms an axial distance from the first permanent magnet array Z1, and constitutes a first magnetic circuit channel C1. The fourth permanent magnet array Z4 is arranged on the second axial side 42 of the insertion portion 43, forms an axial distance from the second permanent magnet array Z2, and constitutes a second magnetic circuit channel C2. In this embodiment, through the design of a double magnetic coupling channel, the magnetic flux density is superimposed. Through the design of the radial gap 53, the magnetic path length is shortened, the magnetic resistance is reduced, and the output torque of the built-in annular magnetic track power mechanism is increased, which can further reduce the dependence on external power and improve the energy-saving effect.

[0039] In this embodiment, the rotation axis 1 is supported in the inner cavity of the machine housing 8 by a magnetic levitation device. The magnetic levitation device and the built-in magnetic track power mechanism produce the following synergistic effects: The magnetic levitation device realizes zero mechanical contact between the rotation axis 1 and the machine housing 8, reduces mechanical friction, and the built-in magnetic track power mechanism provides auxiliary power to the rotation axis 1, realizing a dual-power drive of internal magnetic energy + external input power. The two work together to greatly improve the energy-saving effect of the generator.

[0040] Furthermore, the magnetic levitation device includes a magnetic levitation bearing 2, a position sensor, and a controller. Among them, the position sensor is fixed on the inner wall surface of the machine housing 8 and is used to obtain the position data of the rotor assembly 6. The controller is communicatively connected to the position sensor and the magnetic levitation bearing 2. The controller is configured to: receive position data from the position sensor, generate magnetic force control data based on the position data, and send the generated magnetic force control data to the magnetic levitation bearing 2 to form a closed-loop control, realizing real-time adjustment of the suspension attitude of the rotor assembly 6 and ensuring stable rotation operation of the rotor assembly 6.

[0041] The magnetic levitation bearing 2 is preferably a five-degree-of-freedom magnetic levitation bearing. The five degrees of freedom include translational motion in the X-axis direction in the radial direction, translational motion in the Y-axis direction in the radial direction, translational motion in the Z-axis direction in the axial direction, tilt angle displacement control around the X-axis, and tilt angle displacement control around the Y-axis. By using the five-degree-of-freedom magnetic levitation bearing 2, stable suspension of the rotor assembly 6 in all directions can be realized. Zero mechanical contact is achieved through dynamic compensation of the electromagnetic forces of the radial magnetic bearing and the axial magnetic bearing, and moreover, the vibration friction between the rotor assembly 6 and the air can be reduced, further improving the energy-saving effect.

[0042] The working process of this generator is as follows:

[0043] Connect the power input end of the rotating shaft 1 to an external power source, such as the water wheel of a water turbine generator, the wind wheel of a wind turbine generator, etc. When the external power source drives the rotating shaft 1 to rotate, the generator starts. After starting, under the magnetic field drive of the annular magnetic track 5, the magnetic track vehicle 4 makes a circumferential movement along the annular magnetic track 5. The torque of the magnetic track vehicle 4 is transmitted to the rotating shaft 1 through the bracket 3, and together with the power from the power input end of the rotating shaft 1, it drives the rotating shaft 1 to rotate. The rotating shaft 1 drives the rotor assembly 6 to rotate, causing the stator assembly 7 to generate current and output it.

[0044] Embodiment 2: Generator with Built-in Annular Magnetic Track Power

[0045] Figure 4 Shows the structure of the generator in Embodiment 2.

[0046] Embodiment 2 is also a generator with built-in annular magnetic track power, including a machine housing 8, an annular magnetic track 5, and a magnetic track vehicle 4.

[0047] The structure of Embodiment 2 is basically the same as that of Embodiment 1. The difference is that: in Embodiment 1, the built-in magnetic track power mechanism is arranged on the side of the stator assembly 7 away from the power input end of the rotating shaft 1, while in Embodiment 2, the built-in magnetic track power mechanism is arranged on the side of the stator assembly 7 close to the power input end of the rotating shaft 1.

[0048] Embodiment 3: Generator with Built-in Annular Magnetic Track Power

[0049] Figure 5 Shows the structure of the motor in Embodiment 3.

[0050] Embodiment 3 is also a generator with built-in annular magnetic track power, including a machine housing 8, an annular magnetic track 5, and a magnetic track vehicle 4.

[0051] The structure of Embodiment 3 is basically the same as that of Embodiment 1. The difference is that: in Embodiment 1, a magnetic track power mechanism is arranged on the side of the stator assembly 7 away from the power input end of the rotating shaft 1, while in Embodiment 3, magnetic track power mechanisms are respectively arranged on the side of the stator assembly 7 away from the power input end of the rotating shaft 1 and on the side close to the power input end of the rotating shaft 1.

[0052] Compared with Embodiment 1 and Embodiment 2, Embodiment 3 has better energy-saving effect.

[0053] Embodiment 4: Generator with Built-in Annular Magnetic Track Power

[0054] Embodiment 4 has basically the same structure as Embodiment 1. The difference lies in that: the support mechanism of the rotating shaft is different. In Embodiment 1, the rotating shaft 1 is supported by a magnetic levitation device, while in Embodiment 4, the rotating shaft is supported by connecting to the casing through a rolling bearing.

[0055] Compared with Embodiment 4, the friction between the rotating shaft 1 and the casing 8 in Embodiment 1 is smaller, and the energy-saving effect is better.

[0056] Embodiment 5: An electric motor with an internal ring magnetic track power

[0057] Embodiment 5 is an electric motor, including a casing, a ring magnetic track and a magnetic track vehicle.

[0058] Embodiment 5 has basically the same structure as Embodiment 1. The difference lies in that: Embodiment 1 is a generator, and one end of the rotating shaft 1 extending outside the casing 8 forms a power input end, receiving mechanical energy from an external power source to drive the rotor assembly 6 to rotate, so that the stator assembly 7 outputs electrical energy outward. Embodiment 5 is an electric motor, and one end of the rotating shaft extending outside the casing forms a power output end. The stator assembly is connected to an external power source, receiving electrical energy from the external power source, driving the rotor assembly to rotate, and outputting mechanical energy outward through the rotating shaft.

[0059] The present invention has been described in detail through specific embodiments. These detailed descriptions are only limited to helping those skilled in the art understand the content of the present invention, and should not be construed as a limitation on the protection scope of the present invention. Various modifications, equivalent transformations, etc. made by those skilled in the art to the above solutions under the concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A motor device with built-in annular magnetic track power, characterized in that: The motor device comprises a housing, an annular magnetic track and a magnetic track vehicle; The inner cavity of the casing is provided with a rotor assembly and a stator assembly constituting a core electric energy-mechanical energy conversion mechanism, and a rotating shaft is axially arranged at the center of the rotor assembly. The rotating shaft is supported in the inner cavity of the casing, and at least one end thereof extends to the outside of the casing to form a power input end or a power output end; The annular magnetic track is fixed to the inner wall surface of the housing in a closed ring shape and is arranged around the radial outer side of the rotating shaft; The magnetic rail vehicle is supported on the annular magnetic track by a bracket and forms a torque transmission connection with the rotating shaft. Driven by the magnetic field of the annular magnetic track, the magnetic rail vehicle can move circumferentially along the annular magnetic track.

2. The motor device with built-in annular magnetic track power according to claim 1 is characterized in that: The center distance between the magnetic rail car and the rotating shaft is greater than the radius of the rotor assembly.

3. The motor device with built-in annular magnetic track power according to claim 1, characterized in that: The bracket is a disc, the center of which is provided with an axial hole, the axial hole is interference-fitted with the shoulder of the rotating shaft, and the magnetic rail car is fixed to the outer edge of the disc.

4. The motor device with built-in annular magnetic track power according to claim 1, characterized in that: A clamping flange is provided on the outer periphery of the annular magnetic track, and the clamping flange is clamped and fixed to the positioning groove on the inner wall surface of the casing.

5. The motor device with built-in annular magnetic track power according to claim 1, characterized in that: The annular magnetic track comprises a first magnetic track side portion and a second magnetic track side portion, both of which extend along the circumference of the rotating shaft and form a radial gap with an opening facing the axis in the radial direction, a first permanent magnet array is embedded in the inner working surface of the first magnetic track side portion, and a second permanent magnet array is embedded in the inner working surface of the second magnetic track side portion, and the magnetic pole direction of the first permanent magnet array and the magnetic pole direction of the second permanent magnet array are both axial; The magnetic railcar comprises an insertion portion, a third permanent magnet array and a fourth permanent magnet array, wherein the insertion portion extends into the radial gap, the third permanent magnet array is arranged on an axial first side of the insertion portion, forms an axial spacing with the first permanent magnet array and constitutes a first magnetic circuit channel, and the fourth permanent magnet array is arranged on an axial second side of the insertion portion, forms an axial spacing with the second permanent magnet array and constitutes a second magnetic circuit channel.

6. The motor device with built-in annular magnetic track power according to claim 1, characterized in that: The stator assembly is arranged on the outer periphery of the rotor assembly; The annular magnetic track and the magnetic track car are both provided at the two ends of the stator assembly.

7. The motor device with built-in annular magnetic track power according to claim 1, characterized in that: The motor device is a generator; The end of the rotating shaft extending outside the casing forms a power input end, which provides a first power for starting and continuously rotating the rotor assembly; The annular magnetic track and the magnetic track vehicle form a magnetic auxiliary traction device to provide a second power for the continuous rotation of the rotor assembly.

8. The motor device with built-in annular magnetic track power according to claim 1, characterized in that: The motor device is an electric motor; The stator assembly provides a third power for starting and continuously rotating the rotor assembly; The annular magnetic track and the magnetic track vehicle form a magnetic auxiliary traction device to provide a second power for the continuous rotation of the rotor assembly.

9. The motor device with built-in annular magnetic track power according to any one of claims 1 to 8, characterized in that: The rotating shaft is supported in the inner cavity of the casing by a magnetic suspension device; The magnetic levitation device includes a magnetic levitation bearing, a position sensor and a controller. The position sensor is fixed to the inner wall of the casing and is used to obtain position data of the rotor assembly. The controller is communicatively connected to the position sensor and the magnetic levitation bearing and is used to receive position data from the position sensor, generate magnetic control data based on the position data, and send the magnetic control data to the magnetic levitation bearing to form a closed-loop control.

10. The motor device with built-in annular magnetic track power according to claim 9, characterized in that: The magnetic suspension bearing is a five-degree-of-freedom magnetic suspension bearing, and the five degrees of freedom include radial X-axis translation, radial Y-axis translation, axial Z-axis translation, tilt angle displacement control around the X-axis, and tilt angle displacement control around the Y-axis.

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