A passive magnetic levitation rotor

Abstract

The present invention belongs to the technical field of magnetic levitation rotors and discloses a passive magnetic levitation rotor, comprising a base, wherein the base is equipped with a motor fixing seat, two protective bearing fixing seats and two magnetic levitation bearing fixing seats; the motor fixing seat is equipped with a motor, the output end of the motor is connected to a wireless power transmission primary side component, the protective bearing fixing seat is equipped with a protective bearing, the magnetic levitation bearing fixing seat is equipped with a magnetic levitation bearing, the axis of the protective bearing and the axis of the magnetic levitation bearing are equipped with a rotating shaft together, the rotating shaft is equipped with an inertia disk, the wireless power transmission secondary side component is equipped at the end of the rotating shaft, the wireless power transmission secondary side component is located inside the wireless power transmission primary side component, the rotating shaft is equipped with an electromagnetic coil, the position of the electromagnetic coil corresponds to the magnetic levitation bearing, and the electromagnetic coil is electrically connected to the wireless power transmission secondary side component.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic suspension rotors, and in particular relates to a passive magnetic suspension rotor. Background Art

[0002] Bearings, key components providing support in the machinery industry, have long been dominated by simple, easily adjustable mechanical bearings. However, with the acceleration of modern industrialization, higher performance requirements have emerged. For example, bearings used in high-speed motors are required to withstand higher rotor speeds, higher operating temperatures, and minimal friction losses—performance requirements that exceed the capabilities of traditional bearings. Furthermore, bearings are increasingly being used in a wider range of applications, requiring greater flexibility. These demands are bound to drive further research into new bearing technologies.

[0003] The magnetic levitation rotor, also known as a magnetic bearing or electromagnetic bearing, is a high-performance bearing that uses the force of the magnetic field to suspend the rotor in space so that there is no mechanical contact between the rotor and the stator. Compared with traditional rolling bearings and sliding bearings, the magnetic levitation rotor has no mechanical contact, so the shaft can reach a very high operating speed. It has the advantages of no mechanical wear, low energy consumption, low noise, long life, no need for lubrication, and no pollution.

[0004] Magnetic levitation rotors, based on their control methods for rotor suspension, can be simply categorized as active and passive. The operating principle of an active magnetic levitation rotor is as follows: electromagnets are mounted on magnetic bearings, and permanent magnets are mounted on the rotating shaft. The magnetic force exerted by the bearings on the rotating shaft acts as an attractive force, creating a gradually unstable system. If the rotating shaft moves downward during operation, a displacement sensor transmits the displacement signal to the electromagnet power supply, which adjusts the current in the electromagnets to generate a stronger attractive force on the electromagnets above the rotating shaft, thereby returning the rotating shaft to its original position. Therefore, active magnetic levitation rotors require a complex control system to ensure stable operation.

[0005] Generally, permanent magnets are installed on magnetic bearings and rotating shafts. The bearings apply thrust to the rotating shaft. The rotor system is a self-stabilizing system, which can make the rotor work stably without applying any control. However, the permanent magnets on the rotating shaft will demagnetize during use, affecting the normal operation of the rotor. Summary of the Invention

[0006] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a passive magnetic levitation rotor.

[0007] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0008] A passive magnetic levitation rotor comprises a base, wherein the base is provided with a motor fixing seat, two protective bearing fixing seats and two magnetic levitation bearing fixing seats;

[0009] The motor fixing seat is installed with a motor, the output end of the motor is connected to a wireless power transmission primary component, the protective bearing fixing seat is installed with a protective bearing, the magnetic bearing fixing seat is installed with a magnetic bearing, the axis of the protective bearing and the axis of the magnetic bearing are installed with a rotating shaft, the rotating shaft is installed with an inertia disk, the wireless power transmission secondary component is installed at the end of the rotating shaft, the wireless power transmission secondary component is located inside the wireless power transmission primary component, the rotating shaft is installed with an electromagnetic coil, the position of the electromagnetic coil corresponds to the magnetic bearing, and the electromagnetic coil is electrically connected to the wireless power transmission secondary component.

[0010] It is further defined that the wireless power transmission primary component is composed of a rectifier inverter circuit and a primary winding. The industrial frequency AC power generated by the motor is transmitted to the primary winding through the rectifier inverter circuit. In this design, the rectifier inverter circuit is responsible for converting DC power into AC power and then transmitting it to the primary winding. In this process, the energy conversion and transmission process can be optimized and energy loss can be reduced. The primary winding is a key part of energy transmission, and its design and material selection have a direct impact on the energy transmission efficiency. The optimized primary winding design can reduce resistance and inductance, and reduce energy loss during transmission. The combination of the current inverter circuit and the primary winding can form a stable energy transmission system, and the rectifier inverter circuit Through precise control strategies, the stability and quality of the output power can be ensured, thereby reducing the impact on the primary winding and the entire system. The design of the primary winding also takes into account the stability requirements of the system. Through reasonable winding and insulation design, the stability and reliability of the winding can be ensured during long-term operation, thereby improving the stability of the entire system. The combination of the rectifier inverter circuit and the primary winding makes the wireless power transmission system more flexible and convenient. The rectifier inverter circuit can adjust the frequency and amplitude of the output power as needed to adapt to different power transmission needs and scenarios. The design of the primary winding can also be customized and optimized according to different application requirements to meet the wireless power transmission needs in different scenarios.

[0011] It is further defined that the wireless power transmission secondary side component is composed of a complex variable winding and a current conditioning circuit, and the complex variable winding is connected to the electromagnetic coil through the current conditioning circuit. Such a design makes the conversion of current and voltage more flexible and efficient. In the wireless power transmission system, the complex variable winding can adjust the magnitude and direction of current and voltage according to different power transmission requirements and scenarios, thereby achieving more efficient energy transmission. This flexibility enables the wireless power transmission system to adapt to a wider range of application scenarios and improve the overall power transmission efficiency. The current conditioning circuit plays a key bridge role between the complex variable winding and the electromagnetic coil. It can accurately condition and control the current output by the complex variable winding to ensure the stability and quality of the current. Through the current conditioning circuit, the clutter and interference in the current can be eliminated, the purity of the current can be improved, thereby reducing the energy loss during the transmission process. At the same time, the current conditioning circuit can also amplify or reduce the current to meet the current requirements of the electromagnetic coil and ensure the stable operation of the wireless power transmission system.

[0012] The invention further specifies that the magnetic bearing comprises a stator and a permanent magnet connected thereto. With this design, the magnetic bearing uses magnetic force to suspend the rotor in a magnetic field, without mechanical contact between the rotor and the stator. This contactless support eliminates the energy loss and wear caused by contact friction in traditional mechanical bearings, thereby extending the bearing's service life. Since there is no physical contact between the rotor and stator of the magnetic bearing, the friction coefficient is extremely low, almost zero, significantly reducing problems such as heat, wear, and dust generated by friction, lowering maintenance costs and improving equipment reliability. The rotor of the magnetic bearing can rotate at very high speeds without becoming unstable due to centrifugal force. Furthermore, by precisely regulating the current of the electromagnet through a control system, the magnitude and direction of the magnetic buoyancy force can be effectively controlled, maintaining the rotor in a stable suspended state, thereby improving the operational stability and precision of the equipment.

[0013] It is further defined that there is a gap between the rotating shaft and the protective bearing. With this design, when the rotor is powered on, the protective bearing maintains a certain distance from the rotating shaft to avoid mechanical contact. When the rotor is powered off and stops working, the rotating shaft loses its suspension force, and the protective bearing then plays a supporting role in the rotating shaft.

[0014] The beneficial effects of the present invention are as follows:

[0015] The present invention avoids the mechanical connection between the rotating shaft and the motor through wireless power transmission. The electromagnetic coil generates a specific electromagnetic field, which interacts with the permanent magnet of the magnetic levitation bearing to generate a levitation force. Compared with active magnetic levitation rotors, the present invention is a self-stabilizing system that can maintain stable operation of the rotor without a complex control system. Compared with general passive magnetic levitation rotors, the rotating shaft will not be demagnetized, ensuring the reliability of the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0017] Figure 1 This is a schematic structural diagram of an embodiment of a passive magnetic levitation rotor according to the present invention;

[0018] Figure 2 This is a schematic diagram of the rotating shaft structure of an embodiment of a passive magnetic levitation rotor of the present invention;

[0019] Figure 3 This is a cross-sectional structural diagram of the location of the primary side components of wireless power transmission in an embodiment of a passive magnetic levitation rotor according to the present invention;

[0020] The main component symbols are described as follows:

[0021] Base 1; motor fixing seat 2; protective bearing fixing seat 3; magnetic bearing fixing seat 4; motor 5; wireless power transmission primary side component 6; protective bearing 7; magnetic bearing 8; rotating shaft 9; inertia disk 10; wireless power transmission secondary side component 11; electromagnetic coil 12. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 、 Figure 2 、 Figure 3 As shown, a passive magnetic suspension rotor of the present invention comprises a base 1, on which a motor fixing seat 2, two protective bearing fixing seats 3 and two magnetic suspension bearing fixing seats 4 are installed;

[0024] The motor fixing seat 2 is installed with a motor 5, and the output end of the motor 5 is connected to the wireless power transmission primary side component 6. The protective bearing fixing seat 3 is installed with a protective bearing 7. The magnetic levitation bearing fixing seat 4 is installed with a magnetic levitation bearing 8. The axis of the protective bearing 7 and the axis of the magnetic levitation bearing 8 are installed with a rotating shaft 9. The rotating shaft 9 is installed with an inertia disk 10. The wireless power transmission secondary side component 11 is installed at the end of the rotating shaft 9. The wireless power transmission secondary side component 11 is located inside the wireless power transmission primary side component 6. The rotating shaft 9 is installed with an electromagnetic coil 12. The position of the electromagnetic coil 12 corresponds to the magnetic levitation bearing 8. The electromagnetic coil 12 is electrically connected to the wireless power transmission secondary side component 11.

[0025] Preferably, the wireless power transmission primary component 6 is composed of a rectifier inverter circuit and a primary winding. The industrial frequency AC power generated by the motor 5 is transmitted to the primary winding through the rectifier inverter circuit. In this design, the rectifier inverter circuit is responsible for converting DC power into AC power and then transmitting it to the primary winding. In this process, the energy conversion and transmission process can be optimized and energy loss can be reduced. The primary winding is a key part of energy transmission, and its design and material selection have a direct impact on the energy transmission efficiency. The optimized primary winding design can reduce resistance and inductance, and reduce energy loss during transmission. The combination of the current inverter circuit and the primary winding can form a stable energy transmission system. The rectifier inverter circuit is used Precise control strategies can ensure the stability and quality of the output power, thereby reducing the impact on the primary winding and the entire system. The design of the primary winding also takes into account the stability requirements of the system. Through reasonable winding and insulation design, the stability and reliability of the winding can be ensured during long-term operation, thereby improving the stability of the entire system. The combination of the rectifier inverter circuit and the primary winding makes the wireless power transmission system more flexible and convenient. The rectifier inverter circuit can adjust the frequency and amplitude of the output power as needed to adapt to different power transmission needs and scenarios. The design of the primary winding can also be customized and optimized according to different application requirements to meet the wireless power transmission needs in different scenarios.

[0026] Preferably, the wireless power transmission secondary component 11 is composed of a complex variable winding and a current conditioning circuit. The complex variable winding is connected to the electromagnetic coil 12 through the current conditioning circuit. Such a design makes the conversion of current and voltage more flexible and efficient. In the wireless power transmission system, the complex variable winding can adjust the magnitude and direction of current and voltage according to different power transmission requirements and scenarios, thereby achieving more efficient energy transmission. This flexibility enables the wireless power transmission system to adapt to a wider range of application scenarios and improve the overall power transmission efficiency. The current conditioning circuit plays a key bridge role between the complex variable winding and the electromagnetic coil. It can accurately condition and control the current output by the complex variable winding to ensure the stability and quality of the current. Through the current conditioning circuit, the clutter and interference in the current can be eliminated, the purity of the current can be improved, and thus the energy loss during the transmission process can be reduced. At the same time, the current conditioning circuit can also amplify or reduce the current to meet the current requirements of the electromagnetic coil and ensure the stable operation of the wireless power transmission system.

[0027] The magnetic bearing 8 preferably includes a stator and a permanent magnet connected thereto. With this design, the magnetic bearing 8 uses magnetic force to suspend the rotor in the magnetic field, without mechanical contact between the rotor and the stator. This contactless support method eliminates the energy loss and wear caused by contact friction in traditional mechanical bearings, thereby extending the service life of the bearing. Since there is no physical contact between the rotor and stator of the magnetic bearing, the friction coefficient is extremely low, almost zero, which significantly reduces the heat, wear, and dust problems caused by friction, reduces maintenance costs, and improves the reliability of the equipment. The rotor of the magnetic bearing can rotate at very high speeds without being unstable due to centrifugal force. At the same time, by precisely adjusting the current of the electromagnet through the control system, the magnitude and direction of the magnetic buoyancy force can be effectively controlled, maintaining the rotor in a stable suspended state, thereby improving the operational stability and accuracy of the equipment.

[0028] It is preferred that there is a gap between the rotating shaft 9 and the protective bearing 7. With this design, when the rotor is powered on, the protective bearing 7 maintains a certain distance from the rotating shaft 9 to avoid mechanical contact. When the rotor is powered off and stops working, the rotating shaft 9 loses its suspension force. At this time, the protective bearing 7 plays a supporting role for the rotating shaft 9. Furthermore, the gap size needs to be regulated. If the distance is too close, vibration during rotation of the rotating shaft 9 may cause mechanical contact between the rotating shaft 9 and the protective bearing 7. If the distance is large, when the rotor stops working, the protective bearing 7 cannot protect the rotating shaft 9 well. Therefore, the gap size between the two needs to be adjusted according to the specific situation.

[0029] In this embodiment, when a passive magnetic levitation rotor is used, the industrial frequency alternating current output by the motor 5 enters the wireless power transmission primary component 6, causing the wireless power transmission primary component 6 to generate an electromagnetic field. Under the effect of the electromagnetic field, the wireless power transmission secondary component 11 located in the wireless power transmission primary component 6 generates current due to electromagnetic induction, and then outputs the working current to the electromagnetic coil 12. After the electromagnetic coil 12 is energized, it also generates an electromagnetic field. Under the effect of this electromagnetic field, it interacts with the magnetic field generated by the magnetic levitation bearing 8 to generate a levitation force as the kinetic energy for the suspension of the rotating shaft 9, thereby achieving the purpose of serving as a passive magnetic levitation rotor.

[0030] In summary, the suspension force of the rotating shaft 9 comes from the electromagnetic force of the electromagnetic coil 12, and no permanent magnet is installed as in the prior art, so there is no problem of permanent magnet demagnetization, ensuring its service life and reliability.

[0031] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A passive magnetic levitation rotor, comprising a base (1), characterized in that: The base (1) is equipped with a motor fixing seat (2), two protective bearing fixing seats (3) and two magnetic suspension bearing fixing seats (4); The motor fixing seat (2) is installed with a motor (5), the output end of the motor (5) is connected to a wireless power transmission primary side component (6), the protective bearing fixing seat (3) is installed with a protective bearing (7), the magnetic suspension bearing fixing seat (4) is installed with a magnetic suspension bearing (8), the axis of the protective bearing (7) and the axis of the magnetic suspension bearing (8) are installed with a rotating shaft (9), the rotating shaft (9) is installed with an inertia disk (10), the end of the rotating shaft (9) is installed with a wireless power transmission secondary side component (11), the wireless power transmission secondary side component (11) is located inside the wireless power transmission primary side component (6), the rotating shaft (9) is installed with an electromagnetic coil (12), the position of the electromagnetic coil (12) corresponds to the magnetic suspension bearing (8), and the electromagnetic coil (12) is electrically connected to the wireless power transmission secondary side component (11).

2. A passive magnetic levitation rotor according to claim 1, characterized in that: The wireless power transmission primary component (6) is composed of a rectifier inverter circuit and a primary winding, and the industrial frequency alternating current generated by the motor (5) is transmitted to the primary winding through the rectifier inverter circuit.

3. The passive magnetic levitation rotor according to claim 2, characterized in that: The wireless power transmission secondary side component (11) is composed of a complex variable winding and a current conditioning circuit, and the complex variable winding is connected to the electromagnetic coil (12) via the current conditioning circuit.

4. The passive magnetic levitation rotor according to claim 3, characterized in that: The magnetic suspension bearing (8) comprises a stator and a permanent magnet connected thereto.

5. The passive magnetic levitation rotor according to claim 4, characterized in that: There is a gap between the rotating shaft (9) and the protective bearing (7).

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