Micro-friction motor and propeller propulsion system

Abstract

The invention provides a micro-friction motor and a propeller propelling system, and relates to the technical field of propellers, the micro-friction motor comprises a rotor assembly, a stator assembly, a rotating shaft and a magnet assembly; the rotor assembly comprises a rotor and a magnetic shoe in limited connection with the rotor; the stator assembly comprises a stator and silicon steel sheets. The stator is in limited connection with a coil. The rotating shaft is obliquely crossed with the coil and the magnetic shoe at a preset angle, and the driving force of the motor can generate axial first acting force; the magnet assembly comprises a first magnet part and a second magnet part, and the first magnet part and the second magnet part are arranged on the stator and the rotor respectively so as to form second acting force in the gap between the stator and the rotor. The first acting force and the second acting force can act at the same time to offset the axial acting force of the bearing part, then the sliding friction force of the bearing part in the on-load state is reduced, the friction loss of the motor bearing part is weakened from two different angles, and the service life of the motor can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of propellers, and in particular to a micro-friction motor and a propeller propulsion system. Background Art

[0002] The stator and rotor of the existing motor are installed parallel to the shaft, and the shaft connects the rotor and stator through the bearing; when the motor is subjected to axial tensile load (such as lift or tensile load generated and transmitted by the propeller), the axial tensile force F will act completely on the bearing. As the motor rotor rotates at a speed of 1200rpm-20000rpm, the axial tensile load borne by the bearing will cause the resistance f=μF when the bearing rotates to increase; where μ is the sliding friction coefficient. Since the friction loss work is P f =fv, where v is the relative linear velocity between the inner and outer rings of the bearing. The resistance f of the bearing at high speed will cause friction loss work P f The friction loss work P caused by the axial tension f , which is eventually converted into friction heat of the bearings. This causes the motor bearings to heat up severely, which in turn reduces the overall life of the bearings and motors.

[0003] In the related technology, the propeller is driven by a motor. During the high-speed rotation of an ordinary propeller, it not only generates circumferential torque, but also axial tension. The circumferential torque is basically balanced with the electromagnetic driving force between the motor stator and rotor. The axial tension is completely transmitted and acts on the motor bearing, and finally converted into friction and heat loss. As a result, the traditional motor propeller system has a series of problems such as low driving efficiency, large friction loss, and short bearing life. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application provides a micro-friction motor and a propeller propulsion system, which solve the problems of large friction loss and short bearing life existing in traditional motors and the propeller propulsion systems driven by them.

[0005] To achieve the above objectives, this application is implemented through the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a micro-friction motor, which includes a rotor assembly, a stator assembly, a rotating shaft and a magnet assembly; wherein the rotor assembly is constructed to include a rotor and a magnetic shoe connected to the rotor limit; the stator assembly is constructed to include a stator and a silicon steel sheet, and the stator limit is connected to a coil; the rotating shaft is coaxially limited and connected to the rotor, and is connected to the stator through a bearing; the rotating shaft is inclined along its own axial direction with the coil and the magnetic shoe at a preset angle in a spatial coordinate system, and when the coil is energized, the driving force of the motor generates a first axial force through the set preset angle; the magnet assembly includes a first magnet part and a second magnet part, and the first magnet part and the second magnet part are respectively arranged on the stator and the rotor to form a second force between the stator and the rotor; the first force and the second force both at least partially offset the axial force of the bearing to reduce the sliding friction of the bearing under load.

[0007] According to the first aspect of the embodiment of the present application, the aforementioned preset angle is 75°, the first force is the vector component of the driving force of the motor along the axial direction of the shaft, and the second force is one of the attractive force and the repulsive force of the interaction between the first magnet part and the second magnet part.

[0008] According to a first aspect of an embodiment of the present application, the stator includes a stator support, a side of the stator support is formed with an inclined groove portion, multiple layers of silicon steel sheets are stacked obliquely, and each layer of silicon steel sheets is provided with a protrusion to engage with the groove portion.

[0009] According to the first aspect of the embodiment of the present application, each pole magnetic tile is arranged in an inclined shape, and its center of curvature is toward the central axis of the rotating shaft; multiple layers of silicon steel sheets are stacked obliquely in a spatial coordinate system, and each pole coil is formed by winding along the side of the multiple layers of silicon steel sheets via a group of conductive wires.

[0010] According to a first aspect of the embodiment of the present application, the magnetic tile of each pole is an integrally formed first magnetic tile.

[0011] According to a first aspect of the embodiment of the present application, each pole magnetic tile is a second magnetic tile and includes more than two arc-shaped branch segments, and the more than two arc-shaped branch segments are arranged in an inclined and sequential manner.

[0012] According to the first aspect of the embodiment of the present application, the bearing assembly includes a first bearing, a second bearing and a third bearing, the first bearing and the third bearing are arranged sequentially along the length direction of the rotating shaft, the second bearing is sleeved on the outside of the third bearing, and the rotating shaft is connected to the stator through the first bearing, the second bearing and the third bearing.

[0013] According to the first aspect of the embodiment of the present application, the first magnet portion includes a first magnet and a second magnet, both of which are carried on the stator; the second magnet portion includes a third magnet and a fourth magnet, both of which are connected to the rotor limiter.

[0014] According to a first aspect of the embodiment of the present application, the first magnet and the third magnet are arranged in pairs and are adjacent to each other, and the second magnet and the fourth magnet are arranged in pairs and are adjacent to each other.

[0015] In the second aspect, an embodiment of the present application provides a propeller propulsion system, which includes a micro-friction motor and multiple blades, and the micro-friction motor is any one of the micro-friction motors described above; the inclination direction of the multiple blades is consistent with the stator inclination direction and rotor inclination direction of the micro-friction motor.

[0016] According to the second aspect of the embodiment of the present application, multiple blades are evenly spaced along the circumference of the micro-friction motor; the bearing of the micro-friction motor generates an axial force during the operation of multiple blades paddling the medium, and the axial force is in the opposite direction to the first force and the second force of the micro-friction motor.

[0017] The present application provides a micro friction motor and propeller propulsion system. Compared with the prior art, it has the following beneficial effects:

[0018] The coil of the micro-friction motor provided in the present application is connected to the motor stator, and the magnetic shoe is arranged on the motor rotor. On the one hand, the output shaft of the motor and the coil and the magnetic shoe are arranged at an inclined angle at a preset angle in the spatial coordinate system in the present application, so that when the coil of the micro-friction motor is energized, the driving force of the motor will generate a first axial force; on the other hand, the present application is provided with a first magnet part and a second magnet part on the stator and the rotor, and the first magnet part and the second magnet part can form a second force in the gap between the stator and the rotor; the first force and the second force in the present application can act at the same time to offset the axial force of the bearing part, thereby reducing the sliding friction force of the bearing part under load. The present application starts from two different angles to weaken the friction loss of the motor bearing part and can increase the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a top oblique cutaway view of the propeller propulsion system provided in an embodiment of the present application after the micro-friction motor has its rotor housing removed;

[0021] Figure 2 is an upward oblique cutaway view of the propeller propulsion system provided in an embodiment of the present application after the rotor housing of the micro-friction motor is removed;

[0022] Figure 3 is a top oblique view of the micro-friction motor provided in an embodiment of the present application;

[0023] Figure 4 is an oblique upward view of the micro-friction motor provided in an embodiment of the present application;

[0024] Figure 5 is a top oblique view of a propeller propulsion system provided in an embodiment of the present application;

[0025] Figure 6 is an oblique upward view of a propeller propulsion system provided in an embodiment of the present application;

[0026] Figure 7 is a top oblique view of the micro-friction motor provided by an embodiment of the present application with the rotor housing removed;

[0027] Figure 8 is a top oblique view of the stator of the micro-friction motor provided in an embodiment of the present application;

[0028] Fig. 9 is a bottom-up oblique view of the stator of the micro-friction motor provided in an embodiment of the present application;

[0029] Fig.10 This is a top oblique view of a first rotor structure of a micro-friction motor provided in an embodiment of the present application;

[0030] Fig.11 This is a top oblique view of a second rotor structure of a micro-friction motor provided in an embodiment of the present application;

[0031] Fig.12 It is an assembly structure diagram of a stator support, a first bearing, a second bearing, a third bearing and a rotating shaft provided in an embodiment of the present application;

[0032] Fig.13 is a top oblique view of a stator support provided in an embodiment of the present application;

[0033] Fig.14 is an oblique upward view of a stator support provided in an embodiment of the present application;

[0034] Fig.15 is a schematic diagram of the structure of a silicon steel sheet provided in an embodiment of the present application;

[0035] Fig.16 It is a three-dimensional schematic diagram of the three-phase winding of the micro friction motor provided in an embodiment of the present application;

[0036] Fig.17 is a schematic structural diagram of a first magnetic tile of a micro-friction motor provided in an embodiment of the present application;

[0037] Fig.18It is a schematic diagram of the structure of the second magnetic tile of the micro-friction motor provided in an embodiment of the present application.

[0038] Figure numerals: micro-friction motor 1; stator 2; rotor 3; rotating shaft 4; first magnet 5; second magnet 6; third magnet 7; fourth magnet 8; first magnetic tile 9; second magnetic tile 10; coil 11; silicon steel sheet 12; stator support 13; groove portion 14; protrusion 15; first bearing 16; second bearing 17; third bearing 18; blade 19. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The embodiment of the present application provides a micro-friction motor and a propeller propulsion system, which solves the problems of large friction loss and short bearing life of the traditional motor and the propeller propulsion system driven by it, thereby achieving the purposes of saving electricity, improving transmission efficiency, reducing friction loss, increasing working time, and improving the life of the propeller propulsion system.

[0041] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0042] The stator and rotor of the existing motor are installed parallel to the shaft, and the shaft connects the rotor and stator through the bearing; when the motor is subjected to axial tensile load (such as lift or tensile load generated and transmitted by the propeller), the axial tensile force F will act completely on the bearing. As the motor rotor rotates at a speed of 1200rpm-20000rpm, the axial tensile load borne by the bearing will cause the resistance f=μF when the bearing rotates to increase; where μ is the sliding friction coefficient. Since the friction loss work is P f =fv, where v is the relative linear velocity between the inner and outer rings of the bearing. The resistance f of the bearing at high speed will cause friction loss work P f The friction loss work P caused by the axial tension f , which is eventually converted into friction heat of the bearings. This causes the motor bearings to heat up severely, which in turn reduces the overall life of the bearings and motors.

[0043] The propeller propulsion system usually includes a drive motor, which drives the propeller. During the high-speed rotation of the ordinary propeller, not only the circumferential torque is generated, but also the axial tension. The circumferential torque is basically balanced with the electromagnetic driving force between the stator and rotor of the motor. The axial tension is completely transmitted and acts on the motor bearing, and finally converted into friction and heat loss. Based on this, the existing traditional propeller system has a series of problems such as low drive efficiency, large friction loss, and short bearing life, which still need to be improved.

[0044] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] The following first introduces a micro friction motor provided in an embodiment of the present application.

[0046] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 and Fig. 9 The present application provides a micro-friction motor 1, which includes a rotor assembly, a stator assembly, a rotating shaft and a magnet assembly; wherein the rotor assembly is constructed to include a rotor 3 and a magnetic tile connected to the rotor 3 in a limited position; the stator assembly is constructed to include a stator 2 and a silicon steel sheet 12, and the stator 2 is limitedly connected to a coil 11; the rotating shaft 4 is coaxially limitedly connected to the rotor 3 and connected to the stator 2 through a bearing; the rotating shaft 4 is tilted at a preset angle along its own axial direction with the coil 11 and the magnetic tile in the spatial coordinate system.

[0047] Specifically, during the process of energizing the coil 11, the driving force of the motor generates a first axial force through a preset angle; the magnet assembly includes a first magnet portion and a second magnet portion, and the first magnet portion and the second magnet portion are respectively arranged on the stator 2 and the rotor 3 to form a second force between the stator 2 and the rotor 3; the first force and the second force at least partially offset the axial force of the bearing component to reduce the sliding friction of the bearing component under load.

[0048] In the embodiment of the present application, it can be understood that the shaft 4, coil 11 and magnetic tile in the present application are arranged non-parallel. When the micro-friction motor 1 is powered on, while the shaft 4 rotates, an axial tensile magnetic force component parallel to the motor shaft 4 is generated, that is, a vector force component; this vector force component reduces the axial load force originally acting on the bearing part, thereby reducing the sliding friction generated inside the bearing part; this vector force component will increase or decrease synchronously with the increase or decrease of the external load on the micro-friction motor 1; for example, in a propeller propulsion system, this vector force component can increase or decrease synchronously with the change state of wind pressure generated when the propeller moves, and can be adaptively adjusted with the different output power of the micro-friction motor 1. This vector force component is the aforementioned first force, which has the function of offsetting or reducing the original load axial force on the bearing part, thereby reducing the sliding friction of the bearing part of the micro-friction motor 1 during operation.

[0049] Furthermore, the aforementioned second force is the attraction or repulsion of the interaction between the first magnet part and the second magnet part. When the shaft 4 rotates after power is turned on, the attraction or repulsion of the interaction also has the function of offsetting or reducing the original load axial force on the bearing part; based on this, the sliding friction generated on the bearing part can be further reduced by setting the first magnet part and the second magnet part. In the present application, the first force and the second force work together to effectively reduce the friction borne by the bearing part and increase the service life of the bearing part and the micro-friction motor 1.

[0050] In one example, the rotating shaft 4 is arranged at a preset angle of 75° along its own axial direction to intersect the coil 11 and the magnetic tile in the spatial coordinate system.

[0051] The above is a specific implementation scheme of the micro-friction motor provided in the embodiment of the present application. On the one hand, the motor shaft 4, the coil 11 and the magnetic shoe in the present application are arranged at an inclined angle at a preset angle in the spatial coordinate system, so that when the coil 11 of the micro-friction motor 1 is energized, the driving force of the micro-friction motor 1 will generate a first force along the axial direction; on the other hand, the present application is provided with a first magnet part and a second magnet part on the stator 2 and the rotor 3, and the first magnet part and the second magnet part can form a second force between the stator 2 and the rotor 3; the first force and the second force in the present application can act simultaneously to offset the axial force of the bearing part, thereby reducing the sliding friction of the bearing part under load. The present application combines two non-mechanical contacts to generate magnetic forces, which can achieve the effect of almost completely eliminating the contact sliding friction on the bearing roller; thereby achieving the purpose of saving power when the motor is loaded, improving the mechanical transmission efficiency of the motor, increasing the working time, and improving the overall life of the motor bearings and the motor.

[0052] In some embodiments, please refer to Fig.12 , Fig.13 and Fig.14 The stator 2 includes a stator support 13, a side of the stator support 13 is formed with an inclined groove portion 14, multiple layers of silicon steel sheets 12 are stacked and arranged obliquely, and each layer of silicon steel sheets 12 is provided with a protrusion 15 to be engaged with the groove portion 14. It can be understood that the protrusion 15 of the silicon steel sheet 12 is inserted into the inclined groove portion 14 on the stator support 13, thereby realizing the overall inclined arrangement of the multiple layers of silicon steel sheets 12.

[0053] In some embodiments, each pole magnetic tile is arranged in an inclined shape, and its center of curvature is toward the central axis of the rotating shaft 4; please refer to Figure 8 , Fig. 9 and Fig.15 , the multi-layer silicon steel sheets 12 are stacked obliquely in the spatial coordinate system; please refer to Fig.16 Each pole coil 11 is formed by winding along the side of the multi-layer silicon steel sheet 12 via a group of conductive wires.

[0054] In an example, see Fig.10 and Fig.17 , each pole magnetic tile can be an integrally formed first magnetic tile 9.

[0055] In another example, see Fig.11 and Fig.18 Each pole magnetic tile can also be a second magnetic tile 10 and include more than two arc-shaped branches, and the more than two arc-shaped branches are arranged in an inclined and sequential manner; that is, each pole magnetic tile can be composed of more than two arc-shaped branches arranged together.

[0056] In the embodiment of the present application, it can be understood that when the micro-friction motor 1 is powered on, the modified magnetic tile arrangement can still generate a certain magnetic force between the coil 11 and the magnetic tile in the axial direction to offset the axial force on the original bearing. In addition, by changing the magnetic tile in the rotor 3 from the first magnetic tile 9 to the second magnetic tile 10, the difficulty of manufacturing the magnetic tile can be further reduced, and by arranging multiple ordinary magnetic tiles in an inclined manner, the monopolar magnetic tile can be tilted as a whole, and the effect of generating a magnetic force component in the axial direction can be achieved.

[0057] In an example, see Fig.11 Each pole magnetic tile can be formed by arranging three arc-shaped branches, each arc-shaped branch corresponds to one ordinary magnetic tile, that is, each pole magnetic tile can be formed by arranging three ordinary magnetic tiles according to a certain arrangement method.

[0058] In some embodiments, please refer to Fig.12The bearing assembly includes a first bearing 16, a second bearing 17 and a third bearing 18. The first bearing 16 and the third bearing 18 are arranged sequentially along the length direction of the rotating shaft 4. The second bearing 17 is sleeved on the outer side of the third bearing 18. The rotating shaft 4 is connected to the stator 2 through the first bearing 16, the second bearing 17 and the third bearing 18.

[0059] It can be understood that when the coil 11 of the micro-friction motor 1 of the present application is energized, based on the fact that the rotating shaft 4 is set at an inclination angle of 75° along its own axial direction with the coil 11 and the magnetic tile, the original load axial force on the friction force borne by the first bearing 16, the second bearing 17 and the third bearing 18 can be offset or reduced, and the sliding friction of the first bearing 16, the second bearing 17 and the third bearing 18 during operation can be reduced.

[0060] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 The first magnet part includes a first magnet 5 and a second magnet 6, both of which are carried on the stator 2; the second magnet part includes a third magnet 7 and a fourth magnet 8, both of which are position-limitedly connected to the rotor 3. The first magnet 5 and the third magnet 7 are arranged in pairs and are adjacent to each other, and the second magnet 6 and the fourth magnet 8 are arranged in pairs and are adjacent to each other.

[0061] In the embodiment of the present application, it can be understood that there is an interactive attraction between the first magnet 5 and the third magnet 7, and between the second magnet 6 and the fourth magnet 8; this attraction has the function of offsetting or reducing the original load axial force on the first bearing 16, the second bearing 17 and the third bearing 18, thereby reducing the sliding friction of the first bearing 16, the second bearing 17 and the third bearing 18 under load.

[0062] In some embodiments, please refer to Figure 5 , Figure 6 , Figure 8 , Fig.10 and Fig.11 The present application also provides a propeller propulsion system, which includes a micro-friction motor 1 and a plurality of blades 19, wherein the inclination direction of the plurality of blades 19 is consistent with the inclination direction of the stator 2 and the inclination direction of the rotor 3 of the micro-friction motor 1. The plurality of blades 19 are evenly spaced along the circumference of the micro-friction motor 1; the bearing of the micro-friction motor 1 generates an axial force during the operation of the plurality of blades 19 paddling the medium, and the axial force is opposite to the first force and the second force of the micro-friction motor 1.

[0063] In the embodiment of the present application, it can be understood that when the blades 19 of the propeller propulsion system are driven to rotate by the micro-friction motor 1, the blades 19 stroke the air, which can generate axial tension on the first bearing 16, the second bearing 17 and the third bearing 18. The axial tension will generate dynamic friction and friction heat on the first bearing 16, the second bearing 17 and the third bearing 18. This friction has a tendency to hinder the improvement of motor efficiency and is prone to burning the bearings when the speed is too fast.

[0064] Since the rotor 3 and stator 2 of the aforementioned micro-friction motor 1 are arranged in an inclined state, after the micro-friction motor 1 is energized, the magnetic field of the coil 11 will generate an axial magnetic component while generating a circumferential rotational torque, that is, the aforementioned first force; the first force can partially offset or completely offset the axial force acting on the first bearing 16, the second bearing 17 and the third bearing 18 due to the paddle 19 paddling the medium.

[0065] Furthermore, due to the mutual attraction between the first magnet part and the second magnet part, there is attraction between the stator 2 and the rotor 3 of the micro-friction motor 1, that is, there is the aforementioned second force between the gap between the stator 2 and the rotor 3, and the second force has the function of reducing or offsetting the axial tension generated on the bearing part due to the blade 19 paddling the medium, and thus has the ability to reduce the sliding friction and friction heat of the bearing part under load. In addition, the aforementioned second force also reduces the axial load force originally acting on the bearing, further reducing the sliding friction generated on the bearing part.

[0066] In summary, compared with the prior art, this application has the following beneficial effects:

[0067] 1. In the present application, the output shaft of the motor, the coil and the magnetic shoe are arranged to be inclined at a preset angle in the spatial coordinate system, so that when the coil of the micro-friction motor is energized, the driving force of the motor will generate a first axial force; the first force can offset the axial force of the bearing component to a certain extent, thereby reducing the sliding friction of the bearing component under load.

[0068] 2. The present application provides a first magnet portion and a second magnet portion on the stator and the rotor, and the first magnet portion and the second magnet portion can form a second force between the gap between the stator and the rotor; the second force can offset the axial force of the bearing component, thereby reducing the sliding friction force of the bearing component under load, weakening the friction loss of the motor bearing component, and increasing the service life of the motor.

[0069] 3. The present application combines two magnetic forces generated by non-mechanical contact, and based on the first force and the second force, it can almost completely eliminate the effectiveness of the contact sliding friction force on the bearing roller; thereby solving the problems of severe friction and heat generation of bearings of ordinary motors when rotating at high speeds, low motor efficiency and short overall life; achieving the purpose of saving electricity when the motor is loaded and improving the mechanical transmission efficiency of the motor, thereby improving the driving efficiency of the propeller propulsion system and extending the service life of the propeller propulsion system.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A micro friction motor, It is characterized in that include: A rotor assembly is constructed to include a rotor and a magnetic shoe connected to the rotor; The stator assembly is constructed to include a stator and silicon steel sheets, wherein the stator is limitedly connected with a coil; A rotating shaft is coaxially limitedly connected to the rotor and connected to the stator through a bearing; the rotating shaft is tilted along its own axial direction with the coil and the magnetic shoe at a preset angle in a spatial coordinate system, and when the coil is energized, the driving force of the motor generates a first force along the axial direction through the preset angle; and A magnet assembly, comprising a first magnet portion and a second magnet portion, wherein the first magnet portion and the second magnet portion are respectively disposed on the stator and the rotor to form a second force between the gaps of the stator and the rotor; Wherein, the first acting force and the second acting force at least partially offset the axial acting force of the bearing component to reduce the sliding friction force of the bearing component under load.

2. The micro friction motor according to claim 1, It is characterized in that The preset angle is 75 ° The first force is the vector component of the driving force of the motor along the axial direction of the rotating shaft, and the second force is one of the attractive force and the repulsive force of the interaction between the first magnet part and the second magnet part.

3. The micro friction motor according to claim 1, It is characterized in that The stator comprises a stator support, a side of which is formed with an inclined groove portion, multiple layers of silicon steel sheets are stacked obliquely, and each layer of silicon steel sheets is provided with a protrusion to be embedded with the groove portion.

4. The micro friction motor according to claim 1, It is characterized in that The magnetic tiles of each pole are arranged in an inclined shape, and the center of curvature thereof is toward the central axis of the rotating shaft; the multiple layers of silicon steel sheets are stacked and arranged obliquely in a spatial coordinate system, and the coils of each pole are wound and formed along the sides of the multiple layers of silicon steel sheets via a group of conducting wires.

5. The micro friction motor according to claim 4, It is characterized in that The magnetic tile of each pole is an integrally formed first magnetic tile; or, The magnetic tile of each pole is a second magnetic tile and includes more than two arc-shaped branches, and the more than two arc-shaped branches are arranged in an inclined and sequential manner.

6. The micro friction motor according to claim 1, It is characterized in that The bearing assembly includes a first bearing, a second bearing and a third bearing. The first bearing and the third bearing are arranged sequentially along the length direction of the rotating shaft. The second bearing is sleeved on the outer side of the third bearing. The rotating shaft is connected to the stator through the first bearing, the second bearing and the third bearing.

7. The micro friction motor according to claim 1, It is characterized in that The first magnet portion includes a first magnet and a second magnet, and the first magnet and the second magnet are both carried by the stator; the second magnet portion includes a third magnet and a fourth magnet, and the third magnet and the fourth magnet are both connected to the rotor limiter.

8. The micro friction motor according to claim 7, It is characterized in that The first magnet and the third magnet are arranged in pairs and are adjacent to each other, and the second magnet and the fourth magnet are arranged in pairs and are adjacent to each other.

9. A propeller propulsion system, It is characterized in that include: A micro-friction motor, wherein the micro-friction motor is the micro-friction motor according to any one of claims 1 to 8; and A plurality of blades, wherein the inclination directions of the plurality of blades are consistent with the inclination directions of the stator and the rotor of the micro-friction motor.

10. The propeller propulsion system according to claim 9, It is characterized in that The multiple blades are evenly spaced along the circumference of the micro-friction motor; the bearing of the micro-friction motor generates an axial force during the operation of the multiple blades paddling the medium, and the axial force is opposite to the first force and the second force of the micro-friction motor.

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