Flywheel storage and speed regulation device

Abstract

The utility model relates to the technical field of flywheel speed regulation devices, in particular to a flywheel storage speed regulation device which comprises an external shell, a transmission shaft is inserted in the upper end of the external shell, a wind wheel rotating shaft is assembled at the upper end of the transmission shaft, a plurality of fan blades are installed on the outer surface of the wind wheel rotating shaft, and a protection bearing is assembled at the lower end of the transmission shaft. Meanwhile, the lower portion of the transmission shaft is connected with a main rotating shaft, a magnetic bearing is installed on the surface of the main rotating shaft, cover plates are arranged at the upper end and the lower end of the magnetic bearing, radial sensors are installed at the upper ends of the cover plates, and a center rotating disc is assembled at the lower end of the main rotating shaft; the device has the advantages that the friction influence is reduced in the process of transmitting mechanical energy generated by the wind wheel at the front end through the magnetic bearing arranged at the upper end, and the situation that the whole power generation effect of the device is influenced due to the fact that the friction of the main rotating shaft is large and much mechanical energy is lost when power of the generator is transmitted and energy is stored for the flywheel is avoided; the energy storage limit of the flywheel is increased through the high-strength composite fiber material.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel speed regulating devices, in particular to a flywheel storage speed regulating device. Background Art

[0002] Flywheel energy storage refers to a storage method that uses an electric motor to drive a flywheel to rotate at high speed, and then uses the flywheel to drive a generator to generate electricity when needed. It is mostly used in wind power generation and other aspects. Due to the randomness and intermittent characteristics of wind energy, the proportion of wind power generation in the power system is increasing. The voltage fluctuations, frequency deviations, harmonic pollution and other problems caused by wind power generation to the power system are becoming increasingly prominent. In addition, my country's areas with rich wind resources are mostly distributed in the central and western parts of the country where the power grid is relatively weak. The grid connection of a large number of wind turbines poses a great challenge to the normal operation of the existing power system.

[0003] For example, a wind turbine generator system based on flywheel energy storage and speed regulation with announcement number CN203201727U includes a fan blade, a wind rotor axis, a flywheel, a main shaft and a generator; the fan blade is fixed at one end of the wind rotor axis, a circular hole is provided on the end face of the other end of the wind rotor axis, a ratchet is provided on the circumferential inner wall of the circular hole, a ratchet is provided on the flywheel, the ratchet extends into the circular hole, a pawl is provided on the ratchet, and the pawl cooperates with the ratchet; the flywheel, the main shaft and the generator are fixedly coaxially connected in sequence, the wind turbine generator system based on flywheel energy storage and speed regulation also includes a wind rotor axis support bearing and a unit casing, the wind rotor axis support bearing supports the wind rotor axis on the unit casing, the wind turbine generator system based on flywheel energy storage and speed regulation also includes a first main shaft support bearing and a second main shaft support bearing, the first main shaft support bearing and the second main shaft support bearing respectively support the main shaft on the inner wall of the wind rotor axis and the inner wall of the unit casing.

[0004] In the above-mentioned device, a flywheel energy storage speed regulation is adopted in the wind power generation system, that is, when the wind blades of the wind turbine rotate under the drive of wind, they drive the flywheel with appropriate rotational inertia to move. When the wind is strong, the wind blades drive the flywheel to accelerate. When the wind is weak, the kinetic energy stored in the flywheel can still drive the wind turbine to generate electricity. By utilizing the inertia principle and storing energy through a flywheel of appropriate mass, the rotation speed of the wind turbine can be automatically stabilized within a certain range. However, the above-mentioned device lacks the corresponding drag reduction effect in the storage of kinetic energy of the flywheel and the transmission of mechanical energy. In this regard, it is easy to cause relatively low conversion efficiency of mechanical energy. In addition, due to the lack of a stable structure of the flywheel when storing energy, it is also easy to cause the flywheel to shake or other phenomena caused by excessive energy storage during energy storage. Utility Model Content

[0005] The purpose of the utility model is to provide a flywheel storage speed regulating device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A flywheel storage speed regulation device, comprising an external housing. A transmission shaft is inserted into the upper end of the external housing, and a wind wheel shaft is assembled at the upper end of the transmission shaft. At the same time, a plurality of fan blades are installed on the outer surface of the wind wheel shaft. A protective bearing is assembled at the lower end of the transmission shaft, and the protective bearing is inserted into the internal of the external housing. At the same time, a main shaft is connected below the transmission shaft. A magnetic bearing is installed on the surface of the main shaft, and cover plates are provided at the upper and lower ends of the magnetic bearing. At the same time, a radial sensor is installed on the upper end of the cover plate. A central turntable is assembled at the lower end of the main shaft.

[0007] Preferably, buffer blocks are provided on the surface of the magnetic bearing, and a recessed opening is provided on the surface of the central turntable. At the same time, a transmission rod is installed inside the recessed opening.

[0008] Preferably, a flywheel is installed on the outside of the central turntable, and meshing teeth are assembled on the inner surface of the flywheel. At the same time, the transmission rod meshes with the meshing teeth.

[0009] Preferably, an isolation shell is assembled on the outside of the flywheel, a connecting shaft is installed on the lower surface of the flywheel. At the same time, a power shaft is installed at the lower end of the connecting shaft.

[0010] Preferably, auxiliary blocks are installed on the surface of the power shaft, a generator is installed at the lower end of the power shaft. At the same time, a protective block is installed at the lower end of the generator.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] 1. Compared with other flywheel storage speed regulation devices, in this device, the influence of friction is reduced during the transmission of mechanical energy generated by the front wind wheel through the magnetic bearing installed at the upper end, avoiding the large friction of the main shaft during the transmission of generator power and the energy storage for the flywheel, resulting in more loss of mechanical energy and affecting the overall power generation effect of the device.

[0013] 2. In addition, considering that sometimes the wind force is large, ordinary flywheel devices cannot bear large kinetic energy, and excessive kinetic energy will also cause instability of the flywheel itself. Therefore, the flywheel rotor of the device is made of high-strength composite fiber materials, which are wound around the metal hub integrated with the motor rotor through a certain winding method to increase the energy storage capacity of the flywheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the front overall view of the present utility model;

[0015] Figure 2 is the structural cross-sectional view of the present utility model;

[0016] Figure 3 is the internal overall view of the present utility model.

[0017] In the figure: external housing 1, transmission shaft 2, fan blade 3, radial sensor 4, main rotating shaft 5, isolation housing 6, connecting shaft 7, power shaft 8, protection block 9, protection bearing 10, central turntable 11, auxiliary block 12, generator 13, magnetic bearing 14, buffer block 15, meshing teeth 16, transmission rod 17, flywheel 18. Specific implementation

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. 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 shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 3 , the present invention provides a technical solution:

[0020] Figure 1 This is the front overall view of the device. The main body is the external housing 1. The transmission shaft 2 is inserted at the upper end of the external housing 1, and the upper end of the transmission shaft 2 is equipped with a wind wheel rotating shaft. The wind wheel rotating shaft is connected to the upper end of the transmission shaft 2 through assembly. A number of fan blades 3 are installed on the outer surface of the wind wheel rotating shaft. The rotation of the wind wheel rotating shaft is driven by the wind force, and the generated mechanical energy is transmitted through the transmission shaft 2. The lower end of the transmission shaft 2 is equipped with a protection bearing 10, and the protection bearing 10 is inserted inside the external housing 1. The protection bearing 10 is installed in the upper internal space of the external housing 1. Its main function is to effectively protect and straighten the upper transmission shaft 2, give a certain supporting effect to the front end of the transmission shaft 2. At the same time, the lower part of the transmission shaft 2 is connected to the main rotating shaft 5. A magnetic bearing 14 is installed on the surface of the main rotating shaft 5, and covers are provided at the upper and lower ends of the magnetic bearing 14. At the same time, a radial sensor 4 is installed on the upper end of the cover. The structure of the radial displacement sensor includes a coil and a permanent magnet block, which is mainly used to measure the radial displacement of the rotating component, that is, the relative position change along the radius direction. The installation of the magnetic bearing 14 reduces the friction of the main rotating shaft 5 and improves the transmission efficiency of mechanical energy as much as possible. The lower end of the main rotating shaft 5 is equipped with a central turntable 11;

[0021] Figure 2This is a structural sectional view of the device. The main body is a magnetic bearing 14. A buffer block 15 is provided on the surface of the magnetic bearing 14. A recessed opening is provided on the surface of the central turntable 11. At the same time, a transmission rod 17 is installed inside the recessed opening. The transmission rod 17 is inserted in the center of the recessed opening. The design of the acute and wide angles of the recessed opening enables the transmission rod 17 to rotate, thereby providing a one-way transmission effect, that is, rotating along the main rotating shaft 5 can drive the flywheel 18, and conversely, it will slide and not engage. The flywheel 18 is installed outside the central turntable 11. The inner surface of the flywheel 18 is equipped with meshing teeth 16. At the same time, the transmission rod 17 meshes with the meshing teeth 16, and the transmission rod 17 is used to drive the flywheel 18 to convert the redundant mechanical energy into the kinetic energy of the flywheel 18 in a small amount;

[0022] Figure 3 This is the internal general view of the device. The main body is the flywheel 18. An isolation shell 6 is assembled outside the flywheel 18. The isolation shell 6 is installed outside the flywheel 18 without contact, providing a sealed space for the flywheel 18 as much as possible to reduce the friction of the flywheel 18 and reduce the friction coefficient of the flywheel 18 to reduce the loss of kinetic energy when the flywheel 18 rotates. A connecting shaft 7 is installed on the lower surface of the flywheel 18. The connecting shaft 7 is welded to the lower end of the flywheel 18 and connected to the main rotating shaft 5. It is mainly affected by the high-speed rotation. At the same time, a power shaft 8 is installed at the lower end of the connecting shaft 7. An auxiliary block 12 is installed on the surface of the power shaft 8 to straighten the position of the power shaft 8. A generator 13 is installed at the lower end of the power shaft 8. At the same time, a protection block 9 is installed at the lower end of the generator 13.

[0023] In actual use, this device generally needs to be installed on a wind turbine 13. As the wind speed drives, the fan blades 3 are blown, and the wind wheel rotating shaft drives the transmission shaft 2 to rotate, which also drives the internal main rotating shaft 5 to rotate. The power shaft 8 connected at the bottom rotates simultaneously to transmit the mechanical energy to the generator 13 for power generation. The redundant force is transmitted to the flywheel 18 through the central turntable 11 installed outside the main rotating shaft 5. Through the action of the transmission rod 17, when the wind force is small, at this time, the transmission rod 17 slides and does not engage. At this time, the rotational speed of the bottom power shaft 8 is lower than that of the flywheel 18, and the connecting shaft 7 starts to drive the power shaft 8 to rotate, providing the kinetic energy required by the generator 13, and converting the energy stored in the flywheel 18 into mechanical energy and continuing to transmit it to the generator 13.

[0024] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flywheel storage speed regulating device, comprising an external housing (1), a transmission shaft (2) is inserted into the upper end of the external housing (1), and a wind wheel shaft is mounted on the upper end of the transmission shaft (2), and a plurality of fan blades (3) are installed on the outer surface of the wind wheel shaft, characterized in that: The lower end of the transmission shaft (2) is equipped with a protective bearing (10), and the protective bearing (10) is inserted into the interior of the external housing (1). At the same time, the lower part of the transmission shaft (2) is connected to the main rotating shaft (5), and a magnetic bearing (14) is installed on the surface of the main rotating shaft (5). The upper and lower ends of the magnetic bearing (14) are provided with cover plates, and a radial sensor (4) is installed on the upper end of the cover plate. The lower end of the main rotating shaft (5) is equipped with a central turntable (11).

2. A flywheel storage speed regulating device according to claim 1, characterized in that: A buffer block (15) is provided on the surface of the magnetic bearing (14), and a recessed opening is provided on the surface of the central rotating disk (11), and a transmission rod (17) is installed inside the recessed opening.

3. A flywheel storage speed regulating device according to claim 2, characterized in that: A flywheel (18) is installed on the outer side of the central rotating disk (11), and meshing teeth (16) are assembled on the inner surface of the flywheel (18), and a transmission rod (17) meshes with the meshing teeth (16).

4. A flywheel storage speed regulating device according to claim 3, characterized in that: An isolation shell (6) is installed on the outer side of the flywheel (18), and a connecting shaft (7) is installed on the lower surface of the flywheel (18), and a power shaft (8) is installed at the lower end of the connecting shaft (7).

5. A flywheel storage speed regulating device according to claim 4, characterized in that: An auxiliary block (12) is installed on the surface of the power shaft (8), a generator (13) is installed at the lower end of the power shaft (8), and a protection block (9) is installed at the lower end of the generator (13).

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