Magnetic suspension wind power generation transmission shaft control system

Abstract

The utility model relates to the technical field of wind driven generators, in particular to a magnetic suspension wind power generation transmission shaft control system which comprises a tower drum long shaft, one end of the tower drum long shaft is connected with a wind power blade installation base, the other end of the tower drum long shaft is connected with a rotation accelerator, and a permanent magnet outer assembly base is sleeved on the tower drum long shaft. An upper conical surface needle bearing and a lower conical surface needle bearing are arranged at the two ends of the permanent magnet outer assembly base correspondingly, a shaft body of the tower drum long shaft is installed in the permanent magnet outer assembly base through the upper conical surface needle bearing and the lower conical surface needle bearing, and an installation cavity is formed between the interior of the permanent magnet outer assembly base and the tower drum long shaft. A permanent magnet assembly is arranged in the mounting cavity, the initial torque of the small tower rotating system is reduced, and the system can normally work under the action of small wind power to conduct wind power generation.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, specifically to a magnetic levitation wind turbine drive shaft control system. Background Technology

[0002] Bearings are crucial components of wind turbine generators. Their function is to support the rotating mechanical parts, withstand the pressure of the wind turbine, and, during operation, also bear the axial and torsional forces exerted on the blades by the wind. Therefore, their performance is critical to the wind turbine. Currently, wind turbine bearings typically use ball bearings, which require a large starting torque and are subject to high wind power requirements. Utility Model Content

[0003] The purpose of this invention is to provide a magnetic levitation wind power generation drive shaft control system to solve the problem of reducing the starting torque of the tower rotation system, so that the system can work normally under very small wind forces and generate wind power.

[0004] To achieve the above objectives, this utility model provides the following technical solution: It includes a long shaft for a tower, one end of which is connected to a wind turbine blade mounting base, and the other end is connected to a rotary accelerator. A permanent magnet external assembly base is fitted onto the long shaft. An upper tapered needle roller bearing and a lower tapered needle roller bearing are respectively provided at both ends of the permanent magnet external assembly base. The shaft of the long shaft is mounted inside the permanent magnet external assembly base via the upper and lower tapered needle roller bearings. An installation chamber is provided between the permanent magnet external assembly base and the long shaft, and a permanent magnet assembly is provided within the installation chamber.

[0005] Preferably, the permanent magnet assembly includes a plurality of external permanent magnet positioning blocks and internal permanent magnet positioning blocks, which are arranged sequentially from bottom to top. The external permanent magnet positioning blocks are fixed on the inner wall of the external permanent magnet assembly base, and the internal permanent magnet positioning blocks are fixed close to the long axis of the tower. A set of permanent magnets is installed between the opposite faces of adjacent external permanent magnet positioning blocks and internal permanent magnet positioning blocks.

[0006] Preferably, the permanent magnet external positioning block has a vertically arranged vertical limiting part and a first horizontal support part arranged at the bottom of the vertical limiting part; the permanent magnet internal positioning block has a vertical support part near the long axis of the tower, and a second horizontal support part is arranged at the lower part of the vertical support part; the upper end of the vertical limiting part is higher than the upper surface of the second horizontal support part, so that there is an movable gap between the two adjacent sets of permanent magnet external positioning blocks and permanent magnet internal positioning blocks; the permanent magnets are respectively arranged on the upper surface of the first horizontal support part and the lower surface of the second horizontal support part, and a load-bearing gap is provided between the two permanent magnets.

[0007] Preferably, a magnetic drum damping brake is installed on the long shaft of the tower near the lower conical needle roller bearing, and the magnetic drum damping brake is equipped with a Hall counter.

[0008] Preferably, the permanent magnet is composed of multiple groups, each group having two permanent magnets, which are respectively located on the external positioning block and the internal positioning block of the permanent magnet.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] (1) This device provides axial magnetic force through a permanent magnet array to offset 70%-80% of the shaft's self-weight, reducing the starting torque of the tower rotation system, so that the system can work normally under very small wind force and generate wind power.

[0011] (2) By cooperating with the upper tapered needle roller bearing and the lower tapered needle roller bearing, the radial offset of the long axis of the tower is constrained (e.g., displacement caused by sudden wind load changes or vibration), thus ensuring the stability of the device.

[0012] (3) This device is equipped with a magnetic drum damping brake, and the magnetic drum damping brake is equipped with a Hall counter to effectively control the speed and prevent runaway. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the permanent magnet internal positioning block of this utility model;

[0015] Figure 3 This is a cross-sectional view of the permanent magnet external positioning block of this utility model;

[0016] In the figure: 1. Long axis of the tower; 2. Upper conical needle roller bearing; 3. Permanent magnet; 4. External positioning block of permanent magnet; 5. Internal positioning block of permanent magnet; 6. Lower conical needle roller bearing; 7. External assembly base of permanent magnet; 8. Magnetic drum damping brake; 9. Vertical limiting part; 10. First horizontal support part; 11. Vertical support part; 12. Second horizontal support part. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-3 As shown, this utility model provides the following technical solution:

[0019] The device includes a long shaft 1 for the tower, one end of which is connected to a wind turbine blade mounting base, and the other end is connected to a rotary accelerator. A permanent magnet external assembly base 7 is mounted on the long shaft 1. The permanent magnet external assembly base 7 has a honeycomb-shaped impact-resistant layer. The two ends of the permanent magnet external assembly base 7 are respectively provided with an upper conical needle roller bearing 2 and a lower conical needle roller bearing 6. The shaft of the long shaft 1 is mounted in the permanent magnet external assembly base 7 through the upper conical needle roller bearing 2 and the lower conical needle roller bearing 6. Under the action of total gravity, there can be slight contact between the upper and lower surfaces of the conical needle roller bearings. Through the cooperation of the upper conical needle roller bearing 2 and the lower conical needle roller bearing 6, the radial displacement of the long shaft 1 of the tower is constrained (e.g., displacement caused by sudden changes in wind load or vibration), ensuring the stability of the device. An installation chamber is provided between the permanent magnet external assembly base 7 and the long shaft 1, and a permanent magnet assembly is provided in the installation chamber.

[0020] The permanent magnet assembly includes several external permanent magnet positioning blocks 5 and internal permanent magnet positioning blocks 4, arranged sequentially from bottom to top. The external permanent magnet positioning blocks 5 are fixed to the inner wall of the external permanent magnet assembly base 7, and the internal permanent magnet positioning blocks 4 are positioned near the long axis 1 of the tower. A set of permanent magnets 3 is installed between the opposing faces of adjacent external and internal permanent magnet positioning blocks 5 and 4. The external permanent magnet positioning blocks 5 have vertically arranged vertical limiting parts 9 and a first horizontal support part 10 located at the bottom of the vertical limiting parts 9; the internal permanent magnet positioning blocks 4 have a position near the tower. The vertical support part 11 of the long axis 1 has a second horizontal support part 12 at its lower part; the upper end of the vertical limiting part is higher than the upper surface of the second horizontal support part, so that there is an movable gap between the two adjacent sets of permanent magnet external positioning blocks 5 and permanent magnet internal positioning blocks 4; the permanent magnets 3 are respectively located on the upper surface of the first horizontal support part and the lower surface of the second horizontal support part, and there is a load-bearing gap between the two permanent magnets 3. The permanent magnet internal positioning block 4 and the permanent magnet external positioning block 5 forcibly constrain the fluctuation of the suspension gap. When the permanent magnet internal positioning block 4 is overloaded, it will preferentially contact and wear, protecting the permanent magnet from impact.

[0021] A magnetic drum damping brake 8 is installed on the long shaft 1 of the tower near the lower conical needle roller bearing 6. The magnetic drum damping brake 8 can provide stronger braking force in a limited space. The magnetic drum damping brake 8 is equipped with a Hall counter, which works in conjunction with the Hall counter to effectively control the speed and prevent runaway.

[0022] The permanent magnet is composed of multiple groups, each group having two permanent magnets 3. The two permanent magnets are respectively located on the external positioning block and the internal positioning block of the permanent magnet. There is a load-bearing gap between the two permanent magnets in each group. The load-bearing gap between the magnetic groups can ensure that the whole is protected from collision under the action of gravity.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic levitation wind power generation drive shaft control system, characterized in that: The system includes a long shaft (1) of a tower, one end of which is connected to a wind turbine blade mounting base and the other end of which is connected to a rotary accelerator. A permanent magnet external assembly base (7) is mounted on the long shaft (1). The two ends of the permanent magnet external assembly base (7) are respectively provided with an upper conical needle roller bearing (2) and a lower conical needle roller bearing (6). The shaft of the long shaft (1) is installed in the permanent magnet external assembly base (7) through the upper conical needle roller bearing (2) and the lower conical needle roller bearing (6). An installation chamber is provided between the permanent magnet external assembly base (7) and the long shaft (1). A permanent magnet assembly is provided in the installation chamber.

2. The magnetic levitation wind power generation drive shaft control system according to claim 1, characterized in that: The permanent magnet assembly includes several external permanent magnet positioning blocks (5) and internal permanent magnet positioning blocks (4). The external permanent magnet positioning blocks (5) and internal permanent magnet positioning blocks (4) are arranged sequentially from bottom to top. The external permanent magnet positioning blocks (5) are fixed on the inner wall of the external permanent magnet assembly base (7), and the internal permanent magnet positioning blocks (4) are fixed on the long axis (1) of the tower. A set of permanent magnets (3) is installed between the opposite faces of adjacent external permanent magnet positioning blocks (5) and internal permanent magnet positioning blocks (4).

3. The magnetic levitation wind power generation drive shaft control system according to claim 2, characterized in that: The permanent magnet external positioning block (5) is provided with a vertically arranged vertical limiting part (9) and a first horizontal support part (10) at the bottom of the vertical limiting part (9); the permanent magnet internal positioning block (4) is provided with a vertical support part (11) near the long axis (1) of the tower, and a second horizontal support part (12) is provided at the lower part of the vertical support part (11); the upper end of the vertical limiting part (9) is higher than the upper surface of the second horizontal support part (12), so that there is an active gap between the two adjacent sets of permanent magnet external positioning blocks (5) and permanent magnet internal positioning blocks (4); the permanent magnets are respectively provided on the upper surface of the first horizontal support part (10) and the lower surface of the second horizontal support part (12), and there is a load-bearing gap between the two permanent magnets.

4. The magnetic levitation wind power generation drive shaft control system according to claim 1, characterized in that: A magnetic drum damping brake is fitted on the tower long shaft (1) near the lower conical needle roller bearing (6), and the magnetic drum damping brake is equipped with a Hall counter.

5. The magnetic levitation wind power generation drive shaft control system according to claim 1, characterized in that: The permanent magnet is composed of multiple groups, each group having two permanent magnets, which are respectively located on the external positioning block and the internal positioning block (4) of the permanent magnet.

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