Modularized integrated magnetic suspension power generation device

Abstract

The invention discloses a modular integrated magnetic suspension power generation device, which solves the problem that a magnetic suspension power generator cannot be large-sized, and comprises M power generator modules, M is greater than or equal to 2, transmission shafts of the M power generator modules are connected in series through couplings, and stator coils of all single power generators are connected in parallel; the generator module comprises a support, a transmission shaft, a power distributor and N single generators, the support is provided with N generator compartments, N is larger than or equal to 3, the N generator compartments are distributed around the transmission shaft and provided with positioning flanges, the transmission shaft penetrates through the center of the support and is rotationally connected with the support, and the power distributor is fixed to the support. The power distributor comprises a sun gear fixedly connected with the transmission shaft and a planetary gear set coaxially positioned with the N generator shipping spaces, the N single generators are fixed to the N generator shipping spaces through positioning flanges, a rotor of each single generator is in transmission connection with a corresponding planetary gear of the planetary gear set, and the single generators are magnetic suspension generators.

Description

Technical Field

[0001] The present invention relates to the technical field of maglev power generation devices, and in particular to a modular integrated maglev power generation device. Background Art

[0002] Due to the rotor suspension of the maglev generator without contact friction, it has the advantages of high efficiency and low energy consumption. However, limited by the suspension force of the maglev device, it is currently difficult to manufacture large and extra-large maglev generators. In view of this, the present invention provides a modular integrated maglev power generation device. Summary of the Invention

[0003] The purpose of the present invention is to provide a modular integrated maglev power generation device.

[0004] A modular integrated maglev power generation device provided by the present invention includes M generator modules, M≥2. The drive shafts of the M generator modules are connected in series through couplings, and the stator coils of all single generators in the power generation device are connected in parallel;

[0005] The generator module includes:

[0006] A bracket provided with N generator compartments, N≥3. The N generator compartments are distributed around the drive shaft, and the compartments are provided with positioning flanges;

[0007] A drive shaft passing through the center of the bracket and rotatably connected to the bracket;

[0008] A power distributor fixed to the bracket. The power distributor includes a sun gear fixedly connected to the drive shaft and a planetary gear set coaxially positioned with the N generator compartments; and

[0009] N single generators fixed to the N generator compartments through positioning flanges, and the rotors of the N single generators are drivingly connected to the corresponding planetary gears of the planetary gear set. The single generator is a maglev generator.

[0010] In some embodiments, the single generator includes a casing, a stator and a rotor disposed in the inner cavity of the casing. The casing is provided with a five-degree-of-freedom maglev device, and the rotor is supported in the inner cavity of the casing through the maglev device.

[0011] In some embodiments, the N generator compartments are arranged in a star shape.

[0012] In some embodiments, the single generator is provided with a control system. The control system is communicatively connected to a power generation management system through a local area network. The control system includes a status detection unit and a control unit.

[0013] In some embodiments, the state detection unit includes a first sensor configured to detect the rotor position. The first sensor, the control unit, and the magnetic levitation device form a closed-loop control system to keep the rotor in a stable levitation state.

[0014] In some embodiments, the state detection unit further includes a second sensor configured to detect the air temperature inside the housing cavity and a third sensor configured to detect the temperature of the magnetic levitation device. The power generation management system includes an AI (Artificial Intelligence) model. The AI model, the first sensor, the second sensor, the third sensor, and the external power source form a closed-loop control system.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The planetary gear set and the magnetic levitation technology cooperate. The meshing transmission between the sun gear and the planetary gear set can evenly distribute the input torque to N single generators. Combined with the characteristic of the frictionless transmission of the magnetic levitation rotor, the mechanical energy loss is effectively reduced.

[0017] When any one of the single generators fails, the differential compensation mechanism of the planetary gear set can automatically adjust the power distribution ratio to ensure the continuous and stable operation of the remaining single generators. The parallel-connected stator coil network has a voltage self-balancing function and can maintain the output voltage fluctuation rate ≤2% through dynamic circuit reconfiguration in case of a single-point fault. Therefore, the dynamic redundancy and fault tolerance performance is good.

[0018] The standardized cabin design in cooperation with the positioning flange interface enables the hot plugging and replacement of single generators, which can greatly shorten the maintenance operation time.

[0019] The generator modules use couplings to achieve mechanical synchronization of the transmission shafts, which is easy to expand. The number of generator modules can be expanded according to needs to meet the power generation requirements of different powers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a modular integrated magnetic levitation power generation device;

[0021] Figure 2 It is a side view schematic diagram of a generator module;

[0022] Figure 3 It is an end view schematic diagram of a generator module;

[0023] Figure 4 It is a schematic diagram of a single generator; BRIEF DESCRIPTION OF THE DRAWINGS:

[0025] 1-1, drive shaft; 1-2, distributor housing; 1-3, bracket; 1-4, single generator; 1-5, rotor power input end; 1-6, planetary gear; 1-7, sun gear; 2-1, whole machine housing; 2-2, coupling; 2-3, generator module. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, then the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection sought by the present invention.

[0029] Combined with Figure 1 and Figure 2 , this modular integrated magnetic levitation power generation device includes M generator modules 2-3. The M generator modules 2-3 are installed in the whole machine housing 2-1. The axis lines of the drive shafts 1-1 of the M generator modules 2-3 coincide, and the drive shafts 1-1 are connected through couplings 2-2 to achieve mechanical synchronization of the drive shafts 1-1. The stator coils of all the single generators of the M generator modules 2-3 are connected in parallel. M is 2 or an integer greater than 2, and is specifically determined according to the power requirements of the power generation device.

[0030] Among them, the drive shaft 1-1 of the first generator module 2-3 extends outside the whole machine housing 2-1 and serves as a power input end for connecting an external power source.

[0031] Combined with Figure 2 and Figure 3 , the generator module 2-3 includes a bracket 1-3, a transmission shaft 1-1, a power distributor, and N single generators 1-4. In this embodiment, N = 8. N can also be 3, or an integer greater than 3.

[0032] The bracket 1-3 is a support and combination component for the transmission shaft 1-1, the power distributor, and the N single generators 1-4. The bracket 1-3 is provided with N generator compartments, and one compartment can install one single generator 1-4. The N generator compartments are distributed around the transmission shaft 1-1. The compartment is provided with a positioning flange, and the bracket 1-3 is provided with support feet, which are fixed to the bottom of the whole machine housing through the support feet.

[0033] The transmission shaft 1-1 is a power transmission component between the generator modules 2-3 and a power input component of the generator module 2-3. The transmission shaft 1-1 is arranged in the horizontal direction, passes through the center of the bracket 1-3, and is rotatably connected to the bracket 1-3 through a bearing.

[0034] The power distributor is a power transmission and power distribution component between the transmission shaft 1-1 and the N single generators 1-4. The power distributor is fixed to the end face of the bracket 1-3. The power distributor includes a distributor housing 1-2, a sun gear 1-7 fixedly connected to the transmission shaft 1-1, and a planetary gear set coaxially positioned with the N generator compartments. The planetary gear set specifically includes eight planetary gears 1-6, and the eight planetary gears 1-6 correspond to the eight generator compartments one by one.

[0035] The single generator 1-4 is the smallest power generation unit. One single generator 1-4 is installed in each generator compartment. The single generator 1-4 is fixed to the generator compartment through a positioning flange. The rotor of the single generator 1-4 is drivingly connected to the corresponding planetary gear 1-6 of the planetary gear set. In this embodiment, the power input end of the rotor of the single generator 1-4 is key-connected to the central hole of the planetary gear 1-6 to realize the transmission from the planetary gear 1-6 to the rotor of the single generator 1-4. A transmission gear can also be arranged at the power input end of the rotor of the single generator 1-4, and the transmission gear meshes with the planetary gear 1-6 to realize the driving connection.

[0036] The single generator 1-4 is a magnetic levitation generator, including a machine housing, a rotor, a stator, and a magnetic levitation device. The stator and the magnetic levitation device are fixed in the inner cavity of the machine housing. The rotor is supported in the inner cavity of the machine housing through a rotating shaft, and forms a mechanical energy - electrical energy conversion mechanism with the stator. The rotating shaft is supported in the inner cavity of the machine housing through the magnetic levitation device, and one end of the rotating shaft extends out of the machine housing to form the power input end of the rotor.

[0037] According to the classification of controlled degrees of freedom, existing magnetic levitation devices are divided into one-degree-of-freedom, two-degree-of-freedom, and five-degree-of-freedom. The five degrees of freedom include translational motion along the radial X-axis, translational motion along the radial Y-axis, translational motion along the axial Z-axis, tilt angle displacement control about the X-axis, and tilt angle displacement control about the Y-axis. The five-degree-of-freedom magnetic levitation device can achieve stable suspension of the rotor in all directions, and realizes zero mechanical contact through the dynamic compensation of the electromagnetic forces of the radial magnetic bearings and the axial magnetic bearings. The magnetic levitation generator of this embodiment can be a magnetic levitation generator using a one-degree-of-freedom magnetic levitation device, a magnetic levitation generator using a two-degree-of-freedom magnetic levitation device, or a magnetic levitation generator using a five-degree-of-freedom magnetic levitation device, and preferably a magnetic levitation generator using a five-degree-of-freedom magnetic levitation device.

[0038] The magnetic levitation generator of this embodiment is preferably a vacuum magnetic levitation generator. The casing of the vacuum magnetic levitation generator is a sealed casing, and the inner cavity of the casing is in a vacuum state, which makes the air resistance received by the rotor during rotation smaller, and is beneficial to improving the power generation efficiency.

[0039] The N generator compartments on the bracket 1-3 of this embodiment are arranged in a star shape, which makes the gravity of the generator module located at the center of the bracket 1-3, and is beneficial to the stable support of the generator module on the whole machine casing. When the number of generator compartments is three, the three generator compartments can be arranged in an equilateral triangle, and when the number of generator compartments is four, the four generator compartments can be arranged in a regular quadrilateral.

[0040] The working process of this modular integrated magnetic levitation power generation device is as follows:

[0041] Figure 1 From left to right in the figure are the first generator module 2-3, the second generator module 2-3,..., the Mth generator module 2-3. The transmission shaft 1-1 of the first generator module 2-3 extends outside the whole machine casing 2-1 to form a power input end, and this power input end is connected to an external power source, such as the water wheel of a water turbine generator, the wind wheel of a wind turbine generator, etc.

[0042] The external power source drives the transmission shaft 1-1 of the first generator module 2-3 to rotate. The transmission shaft 1-1 drives the sun gear 1-7 of the power distributor to rotate. The sun gear 1-7 drives the eight planetary gears 1-6 of the planetary gear set to rotate synchronously, thereby driving the rotors of the eight single generators 1-4 to rotate, so that the eight single generators 1-4 output electric energy. At the same time, the transmission shaft 1-1 of the first generator module 2-3 drives the transmission shafts 1-1 of the second to the Mth generator modules 2-3 to rotate synchronously, and further enables the single generators 1-4 of the second to the Mth generator modules 2-3 to output electric energy. The electric energy output by all the single generators 1-4 is converged and then output together to the outside.

[0043] This embodiment has the following beneficial effects:

[0044] The planetary gear set works in coordination with magnetic levitation technology. The meshing transmission between the sun gears 1-7 and the planetary gear set can evenly distribute the input torque to the eight single generators 1-4. Combining with the characteristic of the frictionless transmission of the magnetic levitation rotor, the mechanical energy loss is effectively reduced.

[0045] When any of the single generators 1-4 fails, the differential compensation mechanism of the planetary gear set can automatically adjust the power distribution ratio to ensure the continuous and stable operation of the remaining single generators 1-4. The parallel-connected stator coil network has a voltage self-balancing function and can maintain the output voltage fluctuation rate ≤2% through dynamic circuit reconfiguration in case of a single-point fault. Therefore, the dynamic redundant fault tolerance performance is good.

[0046] The standardized cabin design, combined with the positioning flange interface, enables the hot-swap replacement of the single generators 1-4, which can greatly shorten the maintenance operation time.

[0047] The mechanical synchronization of the transmission shaft 1-1 is achieved between the generator modules 2-3 by using a coupling 2-2. It is easy to expand, and the number of generator modules 2-3 can be expanded according to needs to adapt to different power generation requirements.

[0048] Furthermore, each single generator is provided with a control system. The control system is communicatively connected to the power generation management system through a local area network. The control system includes a status detection unit and a control unit. Among them, the status detection unit detects the working status of the single generator, and the control unit adjusts and controls the single generator in real time according to the detection results of the status detection unit to make the single generator generate electricity stably. On the one hand, each single generator constitutes a closed control system, and each single generator can generate electricity stably under the control of its own control system. On the other hand, the single generator is communicatively connected to the power generation management system through a local area network, enabling centralized control of all single generators and real-time understanding of the status of each single generator.

[0049] In some embodiments, the status detection unit includes a first sensor configured to detect the rotor position. The first sensor, the control unit, and the magnetic levitation device form a closed-loop control system to control the rotor to be in a stable levitation state.

[0050] In some embodiments, the state detection unit further includes a second sensor configured to detect the air temperature inside the machine housing cavity and a third sensor configured to detect the temperature of the magnetic levitation device. The power generation management system includes an AI model. The AI model, the first sensor, the second sensor, the third sensor, and the external power source form a closed-loop control system. The AI model can intelligently control the output power of the external power source based on the data of the first sensor, the second sensor, and the third sensor to ensure stable power generation of the power generation device. For example, when the first sensor detects that the rotor is in a stable levitation state and the second sensor and the third sensor detect that the temperature is higher than the preset temperature threshold, the rotation speed of the external power source is controlled to decrease by one gradient, and this process is repeated until the second sensor and the third sensor detect that the temperature returns to the preset temperature threshold.

[0051] The above describes the present invention in detail through specific embodiments. These detailed descriptions are only limited to helping those skilled in the art understand the content of the present invention and should not be construed as a limitation on the protection scope of the present invention. All kinds of modifications and equivalent transformations made by those skilled in the art under the concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular integrated magnetic levitation power generation device, characterized in that: It comprises M generator modules, M≥2, the transmission shafts of the M generator modules are connected in series through a coupling, and the stator coils of all the single generators are connected in parallel; The generator module comprises: A bracket, which is provided with N generator compartments, N ≥ 3, the N generator compartments are distributed around the transmission shaft, and the compartments are provided with positioning flanges; A transmission shaft, which passes through the center of the bracket and is rotatably connected to the bracket; a power distributor fixed to the bracket, the power distributor comprising a sun gear fixedly connected to the transmission shaft, and a planetary gear set coaxially positioned with the N generator compartments; and N single generators are fixed to the N generator compartments via positioning flanges, and the rotors of the N single generators are drivingly connected to the corresponding planetary gears of the planetary gear set. The single generators are magnetically suspended generators.

2. The modular integrated magnetic levitation power generation device according to claim 1 is characterized in that: The single generator comprises a casing, a stator and a rotor arranged in the inner cavity of the casing, the casing is provided with a five-degree-of-freedom magnetic suspension device, and the rotor is supported in the inner cavity of the casing through the magnetic suspension device.

3. The modular integrated magnetic levitation power generation device according to claim 1 is characterized in that: The N generator compartments are arranged in a star shape.

4. The modular integrated magnetic levitation power generation device according to claim 1 is characterized in that: The single generator is provided with a control system, which is connected to the power generation management system through a local area network. The control system includes a state detection unit and a control unit.

5. The modular integrated magnetic levitation power generation device according to claim 4 is characterized in that: The state detection unit includes a first sensor configured to detect the position of the rotor. The first sensor, the control unit and the magnetic suspension device constitute a closed-loop control system to control the rotor to be in a stable suspension state.

6. The modular integrated magnetic levitation power generation device according to claim 5 is characterized in that: The state detection unit also includes a second sensor configured to detect the air temperature in the inner cavity of the casing, and a third sensor configured to detect the temperature of the magnetic levitation device. The power generation management system includes an AI model, and the AI ​​model, the first sensor, the second sensor, the third sensor and the external power source constitute a closed-loop control system.

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