Magnetic suspension power system protection mechanism and rotor system thereof

Abstract

The utility model discloses a magnetic suspension power system protection mechanism and a rotor system thereof, and belongs to the technical field of rotor aircrafts. The utility model solves the problem that an additional protection scheme for the structure is not considered under the condition that ball protection fails, and comprises a shell, the shell is connected with a stator ring through a separable structure, the stator ring is symmetrically provided with two groups of spring telescopic structures, the spring telescopic structures are also provided with balancing weights, and the balancing weights are connected with the shell through a detachable structure. The shell is provided with a plurality of elastic pieces, the elastic pieces are connected with first friction plates, the ends of the spring telescopic structures are rotationally connected with the first friction plates, and second friction plates are arranged at the positions, corresponding to the first friction plates, of the stator ring. When the relative speed of the magnetic suspension rotor wing and the magnetic suspension power system protection mechanism is larger than the critical speed, the centrifugal force borne by the balancing weight drives the spring push rod to push the magnetic suspension power system protection mechanism, and the protection effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotorcraft, and in particular relates to a magnetic suspension power system protection mechanism 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] In the prior art, patent number CN108382566A discloses a magnetically suspended rotor structure, which realizes the support and driving functions of the rotor ring through permanent magnets and disc motors. However, the device only has axial ball bearings, which cannot ensure that the rotor ring rotor will not collide with the electromagnet when the rotor ring is subjected to a sudden change in lateral force. In addition, no additional protection scheme for the structure is considered in the event of ball bearing protection failure. Utility Model Content

[0005] In view of the fact that the prior art only has axial ball bearings, it is impossible to ensure that the rotor ring rotor will not collide with the electromagnet when the rotor ring is subjected to a sudden change in lateral force, and the problem of additional protection solutions for the structure when the ball protection fails is not considered. The utility model provides a magnetic suspension power system protection mechanism and a rotor system thereof.

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

[0007] A magnetic suspension power system protection mechanism comprises a shell, the shell is connected to a stator ring through a detachable structure, two groups of spring telescopic structures are symmetrically arranged on the stator ring, a counterweight block is also arranged on the spring telescopic structure, a plurality of elastic members are arranged on the shell, the elastic members are connected to a first friction plate, an end of the spring telescopic structure is rotatably connected to the first friction plate, and a second friction plate is arranged on the stator ring at a position corresponding to the position of the first friction plate.

[0008] After adopting this technical solution, when the system is in operation, the rotor ring is locked with the stator ring due to sudden disturbance, and the blade drives the stator ring to rotate due to rotational inertia. At this time, the second friction plate on the stator ring and the first friction plate of the magnetic suspension power system protection mechanism rotate relative to each other. While the stator ring rotates, the upper / lower spring telescopic structure, the upper / lower counterweights and the upper / lower rollers are driven to rotate. When the rotation reaches a certain speed, the upper / lower counterweights move outward due to centrifugal force, driving the upper / lower spring telescopic structure to move outward. The upper / lower spring telescopic structure pushes the first friction plate outward through the upper / lower rollers. At this time, a gap is generated between the second friction plate and the first friction plate, and the friction force is reduced to, and the rotor ring and the stator ring rotate freely until the rotation stops naturally. The magnetic suspension power system protection mechanism can effectively ensure that the rotor ring and the stator ring are not damaged due to locking. The magnetic suspension power system protection mechanism is connected to the internal stator ring through a detachable structure, and the tapered ball bearing plays a dual role of radial sliding and axial support. When the relative speed between the magnetic levitation rotor and the magnetic levitation power system protection mechanism is greater than the critical speed, the centrifugal force exerted on the counterweight will drive the spring push rod to push the magnetic levitation power system protection mechanism, thereby causing the first friction plate and the second friction plate to break contact and play a protective role.

[0009] Preferably, each set of spring telescopic structures is composed of a plurality of spring push rods, a roller is provided at the end of each spring push rod, and a groove cooperating with the roller is provided on the first friction plate.

[0010] Preferably, the stator ring is provided with a push rod retainer cooperating with a spring push rod, the spring push rod includes a first spring connected to the stator ring, the first spring is connected to a rod body, one end of the rod body passes through the push rod retainer and is connected to a roller embedded in the groove.

[0011] After adopting this technical solution, the push rod retainer can maintain stable lateral movement of the spring push rod, thereby improving the stability of the device.

[0012] Preferably, the detachable structure is a ball bearing.

[0013] Preferably, the elastic member is a second spring, one end of the second spring is fixedly connected to the housing, and the other end of the second spring is fixedly connected to the first friction plate.

[0014] Preferably, the push rod retainer is a sleeve fixedly arranged on the outer surface of the stator ring, and the rod body is slidably connected to the sleeve.

[0015] A magnetic suspension power system comprises a rotor ring, a stator ring and a rotation drive system for driving the rotor ring to rotate in the stator ring. A magnetic suspension power system protection mechanism is arranged on the outer surface of the stator ring.

[0016] Preferably, an axial support system and a radial support system are provided between the rotor ring and the stator ring so as to provide a gap between the rotor ring and the stator ring.

[0017] 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, and a second side support magnet is arranged on the stator ring at a position corresponding to the first side support magnet; a ball groove is arranged on the rotor ring, and balls are arranged in the ball groove; 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 mechanism is electrically connected to the control system of the electromagnet.

[0018] After adopting this technical solution, when the lift generated by the blade is equal to the gravity of the rotating part itself, the attraction of the first upper supporting magnet and the second upper supporting magnet is controlled to be transformed into repulsion and gradually increase, and the lift generated by the blade is transmitted to the stator ring through the repulsion 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 repulsion 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 active lifting of the rotor ring can be achieved 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 repulsion type suspension mode. When the radial supporting magnet is an electromagnet or a permanent magnet, the suspension protection function can be completed in a repulsion type or an attraction type suspension mode.

[0019] 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.

[0020] 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.

[0021] After adopting this technical solution, the disc motor stator drives the rotor ring rotor to rotate, providing power for the rotation of the blades.

[0022] A rotor system comprises a rotor ring, a stator ring and a rotation drive system for driving the rotor ring to rotate inside the stator ring. A magnetic suspension power system protection mechanism is arranged on the outer surface of the stator ring.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0024] 1. When the lift generated by the blades is equal to the gravity of the rotating part itself, the attraction of the first upper support magnet and the second upper support magnet is controlled to be transformed into repulsion and gradually increase, and the lift generated by the blades is transmitted to the stator ring through the repulsion between the first upper support magnet and the second upper support magnet, so that the aircraft is lifted off. In special cases, when the instantaneous lift is greater than the repulsion generated by the electromagnet control, the rotor ring will contact the ball bearing, causing the rotor ring to rotate normally, thereby achieving the function of protecting the electromagnet and maintaining the normal operation of the power rotor system.

[0025] 2. When the system is in operation, the rotor ring is locked with the stator ring due to sudden disturbance, and the blade drives the stator ring to rotate due to rotational inertia. At this time, the second friction plate on the stator ring and the first friction plate of the magnetic suspension power system protection mechanism rotate relative to each other. The stator ring rotates while driving the upper / lower spring telescopic structure, the upper / lower counterweights and the upper / lower rollers to rotate. When the rotation reaches a certain speed, the upper / lower counterweights move outward due to centrifugal force, driving the upper / lower spring telescopic structure to move outward. The upper / lower spring telescopic structure pushes the first friction plate outward through the upper / lower rollers. At this time, a gap is generated between the second friction plate and the first friction plate, and the friction force is reduced to 0. The rotor ring and the stator ring rotate freely until the rotation stops naturally. The magnetic suspension power system protection mechanism can effectively ensure that the rotor ring and the stator ring are not damaged due to locking. The magnetic suspension power system protection mechanism is connected to the internal stator ring through a detachable structure, and the tapered ball bearing plays a dual role of radial sliding and axial support. When the relative speed between the magnetic levitation rotor and the magnetic levitation power system protection mechanism is greater than the critical speed, the centrifugal force exerted on the counterweight will drive the spring push rod to push the magnetic levitation power system protection mechanism, thereby causing the first friction plate and the second friction plate to break contact and play a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0027] Figure 1 Schematic diagram of the internal structure of the protection mechanism;

[0028] Figure 2 It is a top view cross-sectional view of the protection mechanism of the magnetic levitation power system;

[0029] Figure 3 It is a structural schematic diagram of a spring push rod;

[0030] Among them: 1-stator ring, 2-rod body, 3-housing, 4-push rod holder, 5-tapered ball bearing, 6-counterweight, 7-roller, 8-first friction plate, 9-second spring, 10-second friction plate, 11-second side supporting magnet, 12-first side supporting magnet, 13-motor stator, 14-motor rotor, 15-ball, 16-ball groove, 17-rotor ring, 18-first upper supporting magnet, 19-second upper supporting magnet, 20-first spring. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] Combine the following Figure 1-Figure 3 The utility model is described in detail.

[0034] Example 1

[0035] like Figure 1-3As shown, a magnetic levitation power system protection mechanism includes a shell 3, the shell 3 is connected to the stator ring 1 through a detachable structure, two groups of spring telescopic structures are symmetrically arranged on the stator ring 1, rollers 7 are arranged at the ends of the spring telescopic structures, and a counterweight block 6 is also arranged on the spring telescopic structure. A plurality of elastic members are arranged on the shell 3, and the elastic members are connected to a first friction plate 8. The roller 7 is embedded in a groove on the first friction plate 8, and a second friction plate 10 is arranged on the stator ring 1 at a position corresponding to the position of the first friction plate 8.

[0036] In this embodiment, the push rod holder 4 is a sleeve fixedly arranged on the outer surface of the stator ring 1, and the rod body 2 passes through the sleeve and is slidably connected with the sleeve.

[0037] In this embodiment, the detachable structure is a ball bearing.

[0038] In this embodiment, the elastic member is a second spring 9, one end of which is fixedly connected to the housing 3, and the other end is fixedly connected to the first friction plate 8. The elastic member is composed of three groups of second springs 9, and each group is composed of several second springs 9 uniformly distributed in a ring shape between the first friction plate 8 and the housing 3.

[0039] When the system is in operation, it will drive the stator ring 1 to rotate, and the second friction plate 10 on the stator ring 1 and the first friction plate 8 on the housing 3 will rotate relative to each other. The stator ring 1 rotates while driving the rod body 2, the counterweight 6 and the roller 7 on the upper and lower sides to rotate. When the rotation reaches a certain speed, the counterweight 6 on the upper and lower sides moves outward due to the centrifugal force, driving the rod body 2 to move outward. The rod body 2 on the upper and lower sides pushes the first friction plate 8 to move outward through the end roller 7. At this time, a gap is generated between the second friction plate 10 and the first friction plate 8, and the friction force is reduced to 0. The tapered ball bearing 5 is separated, so that the housing 3 is separated from the stator ring 1, ensuring that the stator ring 1 will not be locked and cause structural damage.

[0040] Example 2

[0041] A rotor system includes a rotor ring 17, a stator ring 1, and a rotation drive system for driving the rotor ring 17 to rotate inside the stator ring 1. A primary protection structure consisting of an axial support system and a radial support system is arranged between the rotor ring 17 and the stator ring 1, and a magnetic suspension power system protection mechanism is arranged on the outer surface of the stator ring 1.

[0042] In this embodiment, the axial support system includes a first upper support magnet 18 arranged on the upper surface of the rotor ring 17, and a second upper support magnet 19 is arranged on the stator ring 1 at a position corresponding to the first upper support magnet 18. The radial support system includes a first side support magnet 12 arranged on the side of the rotor ring 17, and a second side support magnet 11 is arranged on the stator ring 1 at a position corresponding to the first side support magnet 12. A ball groove 16 is arranged on the rotor ring 17, and a ball 15 is arranged in the ball groove 16. The first upper support magnet 18, the second upper support magnet 19, the first side support magnet 12 and the second side support magnet 11 are all electromagnets. The rotor ring 17 or the stator ring 1 is provided with a plurality of distance measuring mechanisms for measuring the axial spacing and radial spacing between the rotor ring 17 and the stator ring 1, and the distance measuring mechanism is electrically connected to the control system of the electromagnet.

[0043] In this embodiment, the rotary drive system includes a disc motor, the motor rotor 14 of the disc motor is arranged at intervals on the lower surface of the stator ring 1, and the motor stator 13 of the disc motor is arranged on the rotor ring 17 at a position corresponding to the motor rotor 14.

[0044] A first upper supporting magnet 18 and its corresponding second upper supporting magnet 19 form a pair, and a first side supporting magnet 12 and its corresponding second side supporting magnet 11 form a pair; in this embodiment, there are 3 pairs of first upper supporting magnets 18 and second upper supporting magnets 19, and the 3 pairs of first upper supporting magnets 18 and second upper supporting magnets 19 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 12 and second side supporting magnets 11; 4 pairs of first side supporting magnets 12 and second side supporting magnets 11 are evenly distributed around the central axis of rotation of the rotor, and cooperate to control the radial displacement limit of the rotor ring 17, 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.

[0045] In this embodiment, Figure 1 As shown, two ball grooves 16 are respectively arranged on the upper surface, the side surface and the lower surface of the stator ring 1 . The ball grooves 16 are annular structures, and balls 15 can be rolled in the ball grooves 16 .

[0046] In this embodiment, the rotary drive system includes a disc motor, the motor rotor 14 of the disc motor is arranged at intervals on the lower surface of the stator ring 1, and the motor stator 13 of the disc motor is arranged on the rotor ring 17 at a position corresponding to the motor rotor 14.

[0047] The specific use method of the utility model is as follows:

[0048] Reference Figure 1-Figure 3When the device starts to operate, the first upper supporting magnet 18 and the second upper supporting magnet 19 first generate gravitational force to attract the rotor ring 17 to rise, so that a gap is generated between the lower surface of the rotor ring 17 and the inner lower surface of the stator ring 1. The motor stator of the disc motor drives the motor rotor on the rotor ring 17 to rotate, providing power for the rotation of the blades. As the speed increases, the lift generated by the blades increases. In this process, the gravitational force generated by the first upper supporting magnet 18 and the second upper supporting magnet 19 is controlled to gradually decrease. When the lift generated by the blades is equal to the gravity of the rotating part itself, the attraction of the first upper support magnet 18 and the second upper support magnet 19 is controlled to be transformed into a repulsive force and gradually increase. The lift generated by the blades is transmitted to the stator ring 1 through the repulsive force between the first upper support magnet 18 and the second upper support magnet 19, and then transmitted to the shell 3 of the secondary protection device by the stator ring 1 through the detachable structure 5, so that the aircraft is lifted off. In special cases, when the instantaneous lift is greater than the repulsive force generated by the control of the first upper support magnet 18 and the second upper support magnet 19, the rotor ring 17 will contact the ball 15, so that the rotor ring 17 rotates normally, achieving the function of protecting the electromagnet and maintaining the normal operation of the power rotor system. When the system is in operation, the rotor ring 17 is locked with the stator ring 1 due to sudden disturbances, and the blades drive the stator ring 1 to rotate due to the rotational inertia. At this time, the second friction plate 10 on the stator ring 1 and the first friction plate 8 on the shell 3 rotate relative to each other. The stator ring 1 rotates while driving the rod body 2, the counterweight 6 and the roller 7 on the upper and lower sides to rotate. When the rotation reaches a certain speed, the counterweight 6 on the upper and lower sides moves outward due to the centrifugal force, driving the rod body 2 to move outward. The rod body 2 on the upper and lower sides pushes the first friction plate 8 to move outward through the end roller 7. At this time, a gap is created between the second friction plate 10 and the first friction plate 8, and the friction force is reduced to, the tapered ball bearing 5 is separated, and the housing 3 is separated from the stator ring 1, and the rotor ring 17 and the stator ring 1 rotate freely until the rotation stops naturally. The secondary protection device can effectively ensure that the rotor ring 17 and the stator ring 1 will not be structurally damaged due to locking.

[0049] The housing 3 is connected to the internal stator ring 1 through a detachable structure 5, and the tapered ball bearing 5 plays a dual role of radial sliding and axial support. When the relative speed between the magnetic suspension rotor and the secondary protection device is greater than the critical speed, the centrifugal force exerted on the counterweight 6 will drive the rod body 2 to push the housing 3, thereby causing the first friction plate 8 and the second friction plate 10 to be out of contact, thus playing a protective role.

[0050] Example 3

[0051] This embodiment is basically the same as Embodiment 2, 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 17 and induction rails arranged on the inner surface of the stator ring 1, and the position of the permanent magnet array corresponds to the position of the induction rail.

[0052] 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 magnetic suspension power system protection mechanism, characterized in that: The invention comprises a shell (3), wherein the shell (3) is connected to a stator ring (1) via a detachable structure, wherein two groups of spring telescopic structures are symmetrically arranged on the stator ring (1), wherein a counterweight block (6) is also arranged on the spring telescopic structure, wherein a plurality of elastic members are arranged on the shell (3), wherein the elastic members are connected to a first friction plate (8), wherein the end of the spring telescopic structure is rotatably connected to the first friction plate (8), and wherein a second friction plate (10) is arranged on the stator ring (1) at a position corresponding to the position of the first friction plate (8).

2. A magnetic suspension power system protection mechanism according to claim 1, characterized in that: Each group of spring telescopic structures is composed of a plurality of spring push rods, each spring push rod is provided with a roller (7) at the end thereof, and the first friction plate (8) is provided with a groove matching with the roller (7).

3. A magnetic suspension power system protection mechanism according to claim 2, characterized in that: The stator ring (1) is provided with a push rod retainer (4) cooperating with a spring push rod, the spring push rod comprises a first spring (20) connected to the stator ring (1), the first spring (20) is connected to a rod body (2), one end of the rod body (2) passes through the push rod retainer (4) and is connected to a roller (7) embedded in the groove.

4. A magnetic suspension power system protection mechanism according to claim 3, characterized in that: The push rod retainer (4) is a sleeve fixedly arranged on the outer surface of the stator ring (1), and the rod body (2) is slidably connected to the sleeve.

5. A magnetic suspension power system protection mechanism according to any one of claims 1 to 4, characterized in that: The elastic member is a second spring (9), one end of the second spring (9) is fixedly connected to the housing (3), and the other end of the second spring (9) is fixedly connected to the first friction plate (8).

6. A magnetic suspension power system protection mechanism according to any one of claims 1 to 3, characterized in that: The detachable structure is a ball bearing (5).

7. A rotor system, characterized in that: It comprises a rotor ring (17), a stator ring (1) and a rotation drive system for driving the rotor ring (17) to rotate inside the stator ring (1), wherein the outer surface of the stator ring (1) is provided with a magnetic suspension power system protection mechanism according to any one of claims 1 to 6.

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