Cooling mechanism of magnetic suspension power system and rotor system thereof

Abstract

The utility model discloses a magnetic suspension power system cooling mechanism and a rotor system thereof, and belongs to the technical field of rotor aircrafts. The magnetic suspension power system solves the problem that in the prior art, a heat dissipation device needs to be further designed for a magnetic suspension power system, the magnetic suspension power system comprises a rotor ring, a stator ring wrapping the rotor ring and a rotation driving system driving the rotor ring to rotate in the stator ring, an opening is formed in one end of the stator ring, the rotor ring is connected with external blades through the opening, and the rotor ring is connected with the rotor ring. The side walls of the two sides of the opening extend inwards to form extending parts, first gaps are formed between the extending parts and the rotor ring, and ducted cooling channels are formed by second gaps between the rotor ring and the stator ring and the first gaps. According to the utility model, upper negative pressure and lower positive pressure are formed by utilizing the characteristic that air above and below the blades flows downwards and the outward extending structure of the stator ring, so that air in the gap between the rotor ring and the stator ring flows, heat dissipated by the motor is dissipated along with the air, and the heat dissipation problem of the motor is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotorcraft, and in particular relates to a cooling mechanism of a magnetic suspension power system and a rotor system thereof. Background Art

[0002] At present, various applications of magnetic levitation technology are in the ascendant at home and abroad, and the more mature applications are mainly concentrated in the field of magnetic levitation trains. In recent years, with the continuous development of magnetic levitation technology, the application of magnetic levitation technology to rotorcraft has become a new design idea for rotor systems, and its core component is the integrated power magnetic levitation rotor system. The main principle of the magnetic levitation power rotor system is: the magnetic levitation rotor ring composed of propeller blades and inner ring rotors is installed in the groove of the aircraft fuselage duct, and the lift generated by the rotation of the rotor is transmitted to the outer ring through magnetic force, and then to the fuselage through the magnetic levitation support method.

[0003] The application of magnetic levitation technology in the support of rotorcraft takes advantage of the outer edge support, that is, the propeller is embedded in the rotorcraft fuselage, so the propeller is well protected and the stealth of the rotorcraft is also improved. Magnetic levitation support is mainly used in high-speed fields. This method solves the problem that when the rotorcraft adopts outer edge support, conventional mechanical bearings cannot meet the performance requirements due to the high speed of the support, and the upper limit of the rotor ring speed is improved. In addition, due to the non-contact and frictionless characteristics of magnetic levitation support, the friction of the system is reduced, and the vibration of the system is theoretically eliminated, and the working efficiency of the rotorcraft is improved.

[0004] Permanent magnets are essential components of disk motors. When the maximum operating temperature is exceeded, demagnetization will occur, and when the Curie temperature is exceeded, the magnetism will completely disappear. Therefore, the temperature rise of the permanent magnet motor becomes a key factor affecting whether the motor can operate under load for a long time. Good thermal conductivity and heat dissipation can avoid overheating and maintain the normal operation of the equipment. The disk motor winding coils and suspension electromagnet winding coils inside the magnetic levitation rotorcraft generate a lot of heat due to power-on, and the disk motor and suspension magnet are compactly arranged. In order to dissipate the internal heat, in addition to selecting a shell material with strong thermal conductivity, a heat dissipation device needs to be further designed. Utility Model Content

[0005] In view of the problem that the disk motor and the suspension magnet in the prior art are compactly arranged, in order to dissipate the internal heat, in addition to selecting a shell material with strong thermal conductivity, a heat dissipation device needs to be further designed. The utility model provides a magnetic suspension power system cooling mechanism and a rotor system thereof.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A cooling mechanism for a magnetic levitation power system comprises a rotor ring, a stator ring wrapped around the rotor ring, and a rotation drive system for driving the rotor ring to rotate within the stator ring, wherein an opening is provided at one end of the stator ring, the rotor ring is connected to external blades through the opening, both side walls of the opening extend inwardly to form an extension portion, a first gap communicating with the outside is provided between the extension portion and the rotor ring, a second gap communicating with the first gap is provided between the rotor ring and the stator ring, and the first gap and the second gap form a ducted cooling channel.

[0008] After adopting this technical solution, a ducted cooling system is designed, utilizing the characteristic that the air above and below the rotating blades flows downward and the extended structure of the stator ring to form upper negative pressure and lower positive pressure, so that gas flows in the gap between the rotor ring and the stator ring, and the heat dissipated by the internal drive motor is dissipated with the gas, solving the heat dissipation problem of the motor under the dense structure.

[0009] Preferably, a receiving groove cooperating with the extension portion is provided on the rotor ring at a position corresponding to the extension portion.

[0010] After adopting this technical solution, when the rotor ring moves upward or downward, the extension part is accommodated by the accommodating groove, thereby avoiding affecting the contact of the rotating mechanism between the rotor ring and the stator ring.

[0011] Preferably, it further comprises a central connector arranged in the middle of the rotor ring, and the two ends of the blade are detachably connected to the central connector and the rotor ring respectively.

[0012] After adopting this technical solution, the blades are detachably connected to the central connector and the rotor ring, and the inclination angle of the blades can be adjusted.

[0013] Preferably, a plurality of first disc structures are circumferentially arranged on the central connector, a plurality of second disc structures are arranged at the end of the rotor ring on the side close to the accommodating groove, a third disc structure and a fourth disc structure are respectively arranged at the root and the end of each blade, a plurality of holes are arranged on the first disc structure, the second disc structure, the third disc structure and the fourth disc structure, and the holes on the first disc structure are connected to the holes on the second disc structure by bolts, and the holes on the fourth disc structure are connected to the holes on the third disc structure by bolts.

[0014] Preferably, an axial support system and a radial support system are provided between the rotor ring and the stator ring.

[0015] Preferably, the axial support system includes a first upper support magnet arranged on the upper surface of the rotor ring, and a second upper support magnet is arranged on the stator ring at a position corresponding to the first upper support magnet; the radial support system includes a first side support magnet arranged on the side of the rotor ring away from the blades, and a second side support magnet is arranged on the stator ring at a position corresponding to the first side support magnet; the upper surface, the lower surface and the side surface away from the blades of the stator ring are all provided with ball grooves, and balls are arranged in the ball grooves; the first upper support magnet, the second upper support magnet, the first side support magnet and the second side support magnet are all electromagnets; a number of distance measuring mechanisms for measuring the axial spacing and radial spacing between the rotor ring and the stator ring are arranged on the rotor ring or the stator ring, and the distance measuring mechanisms are electrically connected to the control system of the electromagnets.

[0016] After adopting this technical solution, when the lift generated by the blade is equal to the gravity of the rotating component itself, the attraction of the first upper supporting magnet and the second upper supporting magnet is controlled to be transformed into a repulsive force and gradually increase, and the lift generated by the blade is transmitted to the stator ring through the repulsive force between the first upper supporting magnet and the second upper supporting magnet, so that the aircraft is lifted off. In special cases, when the instantaneous lift is greater than the repulsive force generated by the electromagnet control, the rotor ring will contact the ball bearing, so that the rotor ring rotates normally, achieving the function of protecting the electromagnet and maintaining the normal operation of the power rotor system. When the first upper supporting magnet and the second upper supporting magnet are electromagnets, the rotor ring can be actively lifted before the lift is generated, so as to reduce the torque required for the disc motor to drive the stator ring to rotate, and realize the zero friction start of the rotor ring. When the upper supporting magnet is a permanent magnet, it should work in a repulsive suspension mode. When the radial supporting magnet is an electromagnet or a permanent magnet, the suspension protection function can be completed by either a repulsive or attractive suspension mode.

[0017] Preferably, the axial support system and the radial support system are both permanent magnet structures, and the permanent magnet structures include a permanent magnet array and an induction rail respectively arranged on the rotor ring or the stator ring.

[0018] Preferably, the rotary drive system comprises a disc motor, the motor rotor of the disc motor is arranged at intervals on the lower surface of the stator ring, and the motor stator of the disc motor is arranged on the rotor ring at a position corresponding to the motor rotor.

[0019] After adopting this technical solution, the disc motor stator drives the rotor ring rotor to rotate, providing power for the rotation of the blades.

[0020] A rotor system comprises the magnetic suspension power system cooling mechanism.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0022] 1. The utility model designs a ducted cooling system, utilizes the characteristic that the air above and below the rotating blades flows downward and the stator ring protruding structure, forms upper negative pressure and lower positive pressure, makes the gas flow in the gap between the rotor ring and the stator ring, and the heat dissipated by the internal drive motor is dissipated with the gas, thus solving the heat dissipation problem of the motor under the dense structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Among them: 1-blade, 2-rotor ring, 3-extension part, 4-stator ring, 5-motor stator, 6-motor rotor, 7-first gap, 8-second gap, 9-first upper supporting magnet, 10-second upper supporting magnet, 11-first side supporting magnet, 12-second side supporting magnet, 13-ball groove, 14-ball, 15-accommodating groove, 16-bolt. DETAILED DESCRIPTION

[0026] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] Combine the following Figure 1 The utility model is described in detail.

[0029] like Figure 1 As shown, a cooling mechanism of a magnetic levitation power system includes a rotor ring 2, a stator ring 4 covered on the rotor ring 2, and a rotation drive system for driving the rotor ring 2 to rotate in the stator ring 4, one end of the stator ring 4 is provided with an opening, the rotor ring 2 is connected to the external blade 1 through the opening, both side walls of the opening extend inward to form an extension portion 3, a first gap 7 communicating with the outside is provided between the extension portion 3 and the rotor ring 2, a second gap 8 communicating with the first gap 7 is provided between the rotor ring 2 and the stator ring 4, and the first gap 7 and the second gap 8 form a ducted cooling channel.

[0030] In this embodiment, a receiving groove 15 cooperating with the extension part 3 is provided on the rotor ring 2 at a position corresponding to the extension part 3. The size and shape of the receiving groove 15 match the shape and size of the extension part 3, so that the ball 14 in the ball groove 13 can contact the rotor ring 2.

[0031] In this embodiment, a central connector is further included, which is arranged in the middle of the rotor ring 2 , and the two ends of the blade 1 are detachably connected to the central connector and the rotor ring 2 , respectively.

[0032] In this embodiment, a plurality of first disc structures are circumferentially arranged on the central connector, a plurality of second disc structures are arranged at the end of the rotor ring 2 on the side close to the accommodating groove, a third disc structure and a fourth disc structure are respectively arranged at the root and the end of each blade 1, and a plurality of holes are arranged on the first disc structure, the second disc structure, the third disc structure and the fourth disc structure, and the holes on the first disc structure are connected to the holes on the second disc structure by bolts 16, and the holes on the fourth disc structure are connected to the holes on the third disc structure by bolts 16.

[0033] In this embodiment, an axial support system and a radial support system are further provided between the rotor ring 2 and the stator ring 4 .

[0034] In this embodiment, the axial support system includes a first upper support magnet 9 arranged on the upper surface of the rotor ring 2, and a second upper support magnet 10 is arranged on the stator ring 4 corresponding to the first upper support magnet 9. The radial support system includes a first side support magnet 11 arranged on the side of the rotor ring 2 away from the blade 1, and a second side support magnet 12 is arranged on the stator ring 4 corresponding to the first side support magnet 11. The upper surface, lower surface and side surface of the stator ring 4 away from the blade 1 are all provided with ball grooves 13, and balls 14 are arranged in the ball grooves 13.

[0035] In the present embodiment, the first upper supporting magnet 9, the second upper supporting magnet 10, the first side supporting magnet 11 and the second side supporting magnet 12 are all electromagnets. A plurality of distance measuring mechanisms for measuring the axial spacing and radial spacing between the rotor ring 2 and the stator ring 4 are arranged on the inner surface of the stator ring 4. The distance measuring mechanisms are electrically connected to the control system of the electromagnets. In the present embodiment, the distance measuring mechanisms are distance sensors.

[0036] In this embodiment, a first upper supporting magnet 9 and its corresponding second upper supporting magnet 10 form a pair, and a first side supporting magnet 11 and its corresponding second side supporting magnet 12 form a pair; in this embodiment, there are 3 pairs of first upper supporting magnets 9 and second upper supporting magnets 10, and the 3 pairs of first upper supporting magnets 9 and second upper supporting magnets 10 are evenly distributed around the central axis of rotation of the rotor to ensure that the overall axial force of the rotor is balanced, and 3 pairs are conducive to reducing weight. There are 4 pairs of first side supporting magnets 11 and second side supporting magnets 12; 4 pairs of first side supporting magnets 11 and second side supporting magnets 12 are evenly distributed around the central axis of rotation of the rotor, and cooperate to control the radial displacement limit of the rotor ring 2, realize autonomous control of the radial limit, and use 4 pairs to reduce the total weight of the rotor under the premise of ensuring radial regulation.

[0037] In this embodiment, the rotary drive system includes a disc motor, the motor rotor 6 of the disc motor is arranged at intervals on the lower surface of the stator ring 4, and the motor stator 5 of the disc motor is set on the rotor ring 2 corresponding to the motor rotor 6.

[0038] In this embodiment, the bending angle of the extension portion 34 is 30 degrees, the width of the second gap 8 in the axial direction is 10 mm (10 mm both above and below), the width of the second gap 8 in the radial direction is 5 mm, and the vertical distance between the end of the extension portion 3 away from the rotor ring 2 and the rotor ring 2 is 6 mm (6 mm both above and below).

[0039] The specific use method of the utility model is as follows:

[0040] Reference Figure 1When the device starts to operate, the first upper supporting magnet 9 and the second upper supporting magnet 10 generate gravitational force to attract the rotor ring 2 to rise, so that the lower surface of the rotor ring 2 and the lower inner surface of the stator ring 4 generate a second gap 8 and a first gap 7. The motor stator 5 of the disc motor drives the motor rotor 6 on the rotor ring 2 to rotate, providing power for the rotation of the blade 1. As the speed increases, the lift generated by the blade 1 increases. During this process, the gravitational force generated by the first upper supporting magnet 9 and the second upper supporting magnet 10 is controlled to gradually decrease. When the lift generated by the blade 1 is equal to the gravity of the rotating component itself, the gravitational force of the first upper supporting magnet 9 and the second upper supporting magnet 10 is controlled to be converted into repulsive force and gradually increase. The lift generated by the blade 1 is transmitted to the stator ring 4 through the repulsive force between the first upper supporting magnet 9 and the second upper supporting magnet 10, so that the aircraft is lifted. When the blade 1 rotates, the airflow under the blade 1 flows downward, and a positive pressure area is generated through the extension part 3 on the lower left side of the stator ring 4, which guides the airflow from the first gap at the first extension part 3 to the second gap between the rotor ring 2 and the stator ring 4. At the same time, a downward airflow is also generated on the upper part of the blade 1, and the extension portion 3 on the upper left side of the stator ring 4 generates a negative pressure area, which draws the airflow from the second gap 8 between the rotor ring 2 and the stator ring 4 through the first gap 7, and finally generates an airflow passage, which plays a role in cooling the motor drive system.

[0041] Example 2

[0042] This embodiment is basically the same as Embodiment 1, except that: the axial support system and the radial support system are both permanent magnet structures, and the permanent magnet structures include permanent magnet arrays respectively arranged on the rotor ring 2 and induction rails arranged on the inner surface of the stator ring 4, and the position of the permanent magnet array corresponds to the position of the induction rail.

[0043] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A cooling mechanism for a magnetic levitation power system, characterized in that: The invention comprises a rotor ring (2), a stator ring (4) covering the rotor ring (2), and a rotation drive system for driving the rotor ring (2) to rotate in the stator ring (4); an opening is provided at one end of the stator ring (4); the rotor ring (2) is connected to an external blade (1) through the opening; both side walls of the opening extend inward to form an extension portion (3); a first gap (7) communicating with the outside is provided between the extension portion (3) and the rotor ring (2); a second gap (8) communicating with the first gap (7) is provided between the rotor ring (2) and the stator ring (4); the first gap (7) and the second gap (8) form a ducted cooling channel.

2. A cooling mechanism for a magnetic levitation power system according to claim 1, characterized in that: A receiving groove (15) cooperating with the extension part (3) is provided on the rotor ring (2) at a position corresponding to the extension part (3).

3. A cooling mechanism for a magnetic levitation power system according to claim 1 or 2, characterized in that: It also comprises a central connector arranged in the middle of the rotor ring (2), and the two ends of the blade (1) are respectively detachably connected to the central connector and the rotor ring (2).

4. A cooling mechanism for a magnetic levitation power system according to claim 3, characterized in that: A plurality of first disc structures are arranged circumferentially on the central connector, a plurality of second disc structures are arranged at the end of the rotor ring (2) on one side close to the receiving groove, a third disc structure and a fourth disc structure are arranged at the root and the end of each blade (1), respectively, a plurality of holes are arranged on the first disc structure, the second disc structure, the third disc structure and the fourth disc structure, and the holes on the first disc structure are connected to the holes on the second disc structure by bolts (16), and the holes on the fourth disc structure are connected to the holes on the third disc structure by bolts (16).

5. The cooling mechanism of a magnetic suspension power system according to claim 1, characterized in that: An axial support system and a radial support system are also provided between the rotor ring (2) and the stator ring (4).

6. A cooling mechanism for a magnetic levitation power system according to claim 5, characterized in that: The axial support system comprises a first upper support magnet (9) arranged on the upper surface of the rotor ring (2), a second upper support magnet (10) being arranged on the stator ring (4) at a position corresponding to the first upper support magnet (9), the radial support system comprises a first side support magnet (11) being arranged on a side of the rotor ring (2) away from the blade (1), a second side support magnet (12) being arranged on the stator ring (4) at a position corresponding to the first side support magnet (11), and the upper surface and the lower surface of the stator ring (4) being provided with a plurality of magnets. A ball groove (13) is provided on the side surface away from the blade (1), and a ball (14) is provided in the ball groove (13); the first upper supporting magnet (9), the second upper supporting magnet (10), the first side supporting magnet (11) and the second side supporting magnet (12) are all electromagnets; a plurality of distance measuring mechanisms for measuring the axial spacing and radial spacing between the rotor ring (2) and the stator ring (4) are provided on the rotor ring (2) or the stator ring (4); and the distance measuring mechanisms are electrically connected to a control system of the electromagnets.

7. The cooling mechanism of a magnetic suspension power system according to claim 5, characterized in that: The axial support system and the radial support system are both permanent magnet structures, and the permanent magnet structures include a permanent magnet array and an induction rail respectively arranged on the rotor ring (2) or the stator ring (4).

8. A cooling mechanism for a magnetic levitation power system according to any one of claims 1 to 2, characterized in that: The rotary drive system comprises a disc motor, the motor rotor (6) of the disc motor is arranged at intervals on the lower surface of the stator ring (4), and the motor stator (5) of the disc motor is arranged on the rotor ring (2) at a position corresponding to the motor rotor (6).

9. A rotor system, characterized in that: A magnetic levitation power system cooling mechanism comprising any one of claims 1 to 8.

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