Multi-layer different-speed air cushion wall type air cushion rotor supporting device

Abstract

The invention discloses a multi-layer different-speed air cushion wall type air cushion rotor supporting device, which is characterized in that the side surface of an air cushion chamber of an air cushion device forms a multi-layer air cushion wall by a fixed air cushion wall and a rotating air cushion wall, the rotating air cushion wall forms different rotating speeds by a rotating speed control device, and contact type rotating sealing devices are arranged among the multi-layer air cushion wall; by controlling the rotating speed difference between the adjacent air cushion walls, the linear speed of the contact type rotary sealing device can be always in an allowable range, and the linear speed of the outer side of the hovering disc is finally achieved through multi-layer speed stacking, so that the contact type rotary sealing device is safely and efficiently used in the environment that the air cushion supports a high-speed rotor.

Description

Technical Field

[0001] This invention belongs to the field of flywheel energy storage, and particularly relates to a device for a multi-layered variable velocity air cushion wall type air cushion support rotor. Background Technology

[0002] In existing air cushion rotor support devices, such as the prior art proposed in CN223622041U (where the air cushion wall and the lifting plate in the air cushion synchronously vibrate to support the rotor) and CN223928172U (where an upper frame air cushion rotor support device is proposed), the air cushion chamber only contains the non-rotating air cushion wall. This approach is more suitable for using non-contact rotary sealing devices. While non-contact sealing devices have the advantage of adapting to high speeds, they also have problems such as high cost and large leakage.

[0003] Contact seals offer advantages such as low cost and minimal leakage. However, they have a drawback: a low maximum permissible linear velocity, making them unsuitable for sealing devices like high-speed flywheels. Therefore, by addressing the issue of low maximum linear velocity in contact seals, adopting contact rotary seals can significantly reduce costs while providing better sealing performance. Summary of the Invention

[0004] (1) Technical problem to be solved: In view of the problem that the existing non-rotating air cushion flywheel energy storage device cannot be used with contact rotary sealing device, the present invention provides a multi-layer variable speed air cushion wall type air cushion support rotor to solve the above problem.

[0005] (2) The technical solution adopted in this invention is as follows: A device for supporting a rotor using a multi-layered, variable-speed air cushion wall includes a base, a lifting plate, and an air cushion chamber formed by air cushion walls. The air cushion chamber is connected to an air supply device. The air cushion walls include rotating air cushion walls and fixed air cushion walls mounted on the base. At least one layer of rotating air cushion walls is disposed between the fixed air cushion walls and the lifting plate. The rotating air cushion walls rotate around the rotor shaft. The lifting plate and the nearest rotating air cushion wall, as well as the rotating air cushion walls and the fixed air cushion walls, are sealed by a contact-type rotary sealing device. The rotating air cushion walls are connected to a speed control device, which controls the rotation speed of the rotating air cushion walls closer to the lifting plate to be higher. The lifting plate is connected to the rotor shaft and the rotor.

[0006] A further technical solution is that a first thrust bearing is provided on the base, the first thrust bearing is concentric with the rotor shaft, and the rotating air cushion wall is installed on the first thrust bearing and rotates around the rotor shaft.

[0007] A further technical solution is that a rotation synchronization device is connected between the rotating air cushion wall and the rotor shaft or the lifting plate, and the rotation synchronization device is rotatably connected to the rotor shaft or the lifting plate.

[0008] A further technical solution is that the fixed air cushion wall includes two layers, the inner fixed air cushion wall is connected to the rotor shaft or the lifting plate by a fixed synchronization device, an elastic sealing device is provided between the two fixed air cushion walls, and the fixed synchronization device is rotatably connected to the rotor shaft or the lifting plate.

[0009] A further technical solution involves installing a second thrust bearing between the bottom wall and the fixed synchronization device, and between the fixed synchronization device and the rotary synchronization device.

[0010] A further technical solution is that the speed control device includes an electric motor, the input shaft of which is connected to a drive wheel, and the drive wheel is connected to the rotating air cushion wall via a transmission connection.

[0011] A further technical solution is that the speed control device includes a generator, the output shaft of which is connected to a second drive wheel, and the second drive wheel is connected to the rotating air cushion wall via a transmission connection.

[0012] A further technical solution is that a rotating air cushion wall sleeve is also installed on the outer side of the rotating air cushion wall.

[0013] A further technical solution is that a lifting plate sleeve is also installed on the outside of the lifting plate.

[0014] A further technical solution is that when the rotating air cushion wall has two or more layers, adjacent rotating air cushion walls are sealed by a contact-type rotary sealing device.

[0015] (3) Due to the adoption of the above technical solution, the beneficial effects of the present invention are: The air cushion device's air cushion chamber consists of multiple layers of air cushion walls, including fixed and rotating air cushion walls. The rotating air cushion walls are rotated at different speeds by a speed control device. Contact-type rotary sealing devices are installed between the multiple layers of air cushion walls. By controlling the speed difference between adjacent air cushion walls, the linear velocity of the contact-type rotary sealing device can always be kept within the allowable range. The combined speeds of the multiple layers ultimately reach the linear velocity of the outer side of the lifting plate, thus enabling the safe and efficient use of the contact-type rotary sealing device in an air-cushioned high-speed rotor environment. This offers three advantages: First, it further reduces costs; second, leakage is minimal, eliminating the need for frequent air compressor replenishment; and third, the air pressure in the air cushion chamber is more stable, with smaller pressure fluctuations, reducing the load requirements on the thrust bearing that mates with the air cushion, allowing the use of cheaper thrust bearings and further reducing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structural principle of Embodiment 1 of the present invention; Figure 2 yes Figure 1 Schematic diagram of a local structure in the middle; Figure 3 This is a schematic diagram of the overall structural principle of Embodiment 3 of the present invention; Figure 4 This is a schematic diagram of the overall structural principle of Embodiment 4 of the present invention; Figure 5 yes Figure 4 A schematic diagram of a local part of the structure. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 - Figure 5 As shown.

[0019] Example 1: A multi-layered, variable-speed air cushion wall type air cushion support rotor device, comprising a base 1, a lifting plate 2, and an air cushion chamber 3 formed by air cushion walls. The air cushion chamber 3 is connected to an air supply device 4. Here, the base 1 is the bottommost metal bottom wall 100. The air cushion wall includes a rotating air cushion wall 6 and a fixed air cushion wall 5 fixedly connected to the base 1. At least one layer of rotating air cushion wall 6 is provided between the fixed air cushion wall 5 and the lifting plate 2. The rotating air cushion wall 6 rotates around the rotor shaft 9. Contact-type rotary sealing devices 7 are installed on the fixed air cushion wall 5 and the rotating air cushion wall 6. The lifting plate 2 is sealed with the nearest rotating air cushion wall 6, and the rotating air cushion wall 6 is sealed with the fixed air cushion wall 5 through the contact-type rotary sealing devices 7. When there are two or more layers of rotating air cushion walls 6, adjacent rotating air cushion walls 6 are sealed with contact-type rotary sealing devices 7. The rotating air cushion wall 6 is connected to a speed control device 8, and the lifting plate 2 is connected to the rotor shaft 9 and the rotor 10. A first thrust bearing 11, which is a thrust ball bearing, is provided on the base 1. The rotating air cushion wall 6 is mounted on the first thrust bearing 11. In this embodiment, the speed control device 8 consists of a motor 800 and a drive wheel 801. The output shaft of the motor 800 is connected to the drive wheel 801, and the drive wheel 801 is connected to the rotating air cushion wall 6 in a transmission connection.

[0020] The various device structures in this embodiment, especially the installation methods of the rotor 10 and rotor shaft 9, can be referenced in Embodiment 4 of the device for synchronous vibration support of the rotor by the air cushion wall and the lifting plate in an air cushion, as proposed in patent publication number CN223622041U. In this structure, the rotor support device is located below the flywheel rotor. The side air cushion wall of the air cushion chamber 3 is composed of a multi-layer air cushion wall structure consisting of a fixed air cushion wall 5 and a rotating air cushion wall 6. The outer fixed air cushion wall 5 is fixed to the base 1 and cannot rotate. The inner side of the fixed air cushion wall 5 consists of two layers of rotating air cushion walls 6. A first thrust bearing 11 is provided on the base 1. The rotating air cushion wall 6 is mounted on the first thrust bearing 11. In this way, the rotating air cushion wall 6 can rotate around the rotor shaft 9.

[0021] Two motors 800 are also provided on the upper part of the bottom wall 100 (in this embodiment, the air cushion is below the rotor 10, and the base 1 is the bottom wall 100). Each motor 800 is provided with a disc-shaped drive wheel 801 that contacts the rotating air cushion wall 6. The disc-shaped drive wheel 801 drives the rotating air cushion wall 6 to rotate by friction. In this way, the two motors 800 can control the two rotating air cushion walls 6 to form different speeds. The rotating air cushion wall 6 that is closer to the lifting plate 2 has a higher speed.

[0022] In this embodiment, since the diameter of the fixed air cushion wall 5 is larger than the diameter of the lifting plate 2, the force exerted on the rotating air cushion wall 6 by the fixed air cushion wall 5 will be greater than the force exerted by the lifting plate 2, and the rotation speed will be less than the required speed. Therefore, the rotating air cushion wall 6 needs to increase its rotation speed through the motor 800 in order to ensure that the required speed is achieved.

[0023] A contact-type rotary sealing device 7 is provided between each layer of air cushion wall. The contact-type rotary sealing device 7 can be a device with stainless steel PTFE oil seal, a sealing device with packing seal, or various other contact-type rotary sealing devices 7.

[0024] In use, the air cushion chamber 3 is first inflated, and then the rotor 10 is rotated. Since the two motors 800 drive the two rotating air cushion walls 6 to rotate at different speeds, this ensures that the rotating air cushion wall 6 closer to the lifting plate 2 rotates at a higher speed. This ensures that the speed difference between two adjacent air cushion walls is within the applicable range of the linear velocity of the contact sealing device. After the speeds of multiple layers are superimposed, the linear velocity of the outer side of the lifting plate can be reached, thus allowing the air cushion walls to safely use the contact rotary sealing device 7.

[0025] If the sealing device uses a stainless steel PTFE oil seal, the maximum linear velocity of the stainless steel PTFE oil seal is generally around 30 m / s. With an air cushion diameter of 1 meter and a lifting plate 2 rotating at 1500 rpm, the edge linear velocity is 78 m / s. Therefore, two layers of rotating air cushion walls 6 are required. Ignoring the slight differences in diameter between the layers of air cushion walls, when the rotation speed of the rotating air cushion wall 6 adjacent to the fixed air cushion wall 5 is controlled at 500 rpm, its linear velocity is approximately 26 m / s. This means the linear velocity difference between the rotating air cushion walls 6 and the fixed air cushion wall 5 is approximately 26 m / s, which does not exceed the maximum linear velocity of the stainless steel PTFE oil seal. When the rotation speed of the rotating air cushion wall 6 adjacent to the lifting plate 2 is controlled at around 1000 rpm, its linear velocity is 52 m / s. The linear velocity difference between the rotating air cushion wall 6 and the lifting plate 2 is 78 m / s minus 52 m / s, which is approximately 26 m / s, also not exceeding the maximum linear velocity of the stainless steel PTFE oil seal. The linear velocity difference between two adjacent rotating air cushion walls 6 is approximately 26 m / s, which is 52 m / s minus 26 m / s.

[0026] The linear velocity difference between the fixed air cushion wall 5 and the outer side of the lifting plate 2 is 78 m / s, which is far higher than the upper limit of the stainless steel PTFE oil seal. Therefore, contact seal 7 cannot be used. However, when two layers of rotating air cushion walls 6 are added between the fixed air cushion wall 5 and the lifting plate 2, since the relative rotation speed between each layer of air cushion wall is below the maximum upper limit of the stainless steel PTFE oil seal, contact seal 7 can be used on the air cushion wall.

[0027] Since a 1-meter diameter carbon ring seal costs over 100,000 yuan, while a 1-meter diameter stainless steel PTFE oil seal costs less than 10,000 yuan, using a stainless steel PTFE oil seal can reduce costs. Furthermore, leakage is minimal, reducing the need for frequent air replenishment in the air compressor. Because of the low leakage, the air pressure in the air cushion chamber 3 is also more stable, with smaller pressure fluctuations. This lowers the load requirements on the thrust bearing that mates with the air cushion, allowing the use of cheaper thrust bearings and further reducing costs.

[0028] Example 2: The various device structures in this example, especially the installation methods of rotor 10 and rotor shaft 9, can be referenced from the installation method of rotor 10 and rotor shaft 9 in the vertical generator or hydro generator of Example 2, proposed in patent publication number CN223928172U. In this structure, the rotor 10 support device is set above the flywheel rotor 10, and the base 1 is the upper frame 101. Based on Example 1, the fixed air cushion wall 5 includes two layers. The inner fixed air cushion wall 5 is connected to the rotor shaft 9 or the lifting plate 2 by a fixed synchronization device 14. An elastic sealing device 15 is provided between the two layers of fixed air cushion walls 5. The fixed synchronization device 14 is rotatably connected to the rotor shaft 9 or the lifting plate 2 (the rotatable connection is achieved by using bearings). The rotating air cushion wall 6 is connected to the rotor shaft 9 or the lifting plate 2 by a rotating synchronization device 16. The rotating synchronization device 16 is rotatably connected to the rotor shaft 9 or the lifting plate 2 (the rotatable connection is achieved by using bearings). The bearings used here are bearings that can withstand radial loads and bidirectional axial loads.

[0029] The fixed synchronization device 14 and the rotating synchronization device 16 mentioned here are the synchronization devices composed of support spokes and a central ring, etc., in a device for synchronous vibration support of the air cushion wall and the lifting plate in an air cushion. The fixed synchronization device 14 ensures that the fixed air cushion wall 5 does not rotate with the vibration of the rotor shaft 9, and the rotating synchronization device 16 ensures that the rotating air cushion wall 6 vibrates and rotates with the vibration of the rotor shaft 9.

[0030] This embodiment differs from Embodiment 2 in that the seal between the upper frame 101 and the rotor shaft 9 is also a contact seal 7 (a non-contact seal can also be used), and the radial bearing is placed in the lower part of the upper frame. Other devices are basically the same.

[0031] The speed control device 8 consists of a generator 803 and a second drive wheel 802. The output shaft of the generator 803 is connected to the second drive wheel 802, and the second drive wheel 802 is connected to the rotating air cushion wall 6 via a transmission connection.

[0032] A generator 803 is also installed on the upper part of the upper frame 101. The generator 803 has a disc-shaped drive wheel 802 that contacts the rotating air cushion wall 6. The disc drive wheel 802 adjusts the rotation speed of the rotating air cushion wall 6 by friction. By controlling the parameters of the generator 803, the rotation speed of the rotating air cushion wall 6 can be controlled within the required range. The optimal rotation speed of the rotating air cushion wall 6 is half that of the lifting plate 2.

[0033] In this embodiment, since the diameter of the fixed air cushion wall 5 is smaller than the diameter of the lifting plate 2, the force exerted on the rotating air cushion wall 6 by the fixed air cushion wall will be less than the force exerted by the lifting plate 2, and the rotation speed will be greater than the required rotation speed. Therefore, the rotating air cushion wall 7 needs to reduce its rotation speed through the generator 803 in order to ensure that the required rotation speed is achieved.

[0034] The side air cushion wall of the air cushion chamber 3 is composed of a multi-layered air cushion wall structure consisting of a fixed air cushion wall 5 and a rotating air cushion wall 6. A fixed air cushion wall 5 is fixed to the upper part of the upper frame 101. Another fixed air cushion wall 5 is located inside the fixed air cushion wall 5. An elastic sealing device 15 is provided between the two layers of fixed air cushion walls 5. A synchronization device 14 is provided on the inner fixed air cushion wall 5, and the inner fixed air cushion wall 5 is fixed to the synchronization device 14. Here, the synchronization device 14 is the same synchronization device as in the prior art. The synchronization device 14 ensures that the inner fixed air cushion wall 5 does not rotate but vibrates synchronously with the rotor shaft 9. The upper part of the stationary air cushion wall 5 is the rotating air cushion wall 6. A rotation synchronization device 16 is provided inside the rotating air cushion wall 6, and the rotating air cushion wall 6 is fixed to the rotation synchronization device 16. This allows the rotating air cushion wall 6 to rotate around the rotor shaft 9, ensuring that the rotating air cushion wall 6 and the stationary air cushion wall 5 have different rotational speeds. A lifting plate sleeve 23 is also fixed to the outside of the lifting plate 2. With the lifting plate sleeve 23, when wear occurs, only the lifting plate sleeve 23 needs to be replaced. A contact-type rotary sealing device 7 is provided between the lifting plate sleeve 23 and the rotating air cushion wall 6.

[0035] In actual use, the number of rotating air cushion walls 6 can be increased as needed.

[0036] A contact-type rotary sealing device 7 is provided between each layer of air cushion wall, and a contact-type rotary sealing device 7 is also provided between the rotating air cushion wall 6 and the lifting plate 2.

[0037] When in use, the air cushion chamber 3 is inflated. Since the rotation speed of each layer of air cushion wall is different, the rotation speed difference between each layer of air cushion wall can ensure that the linear velocity of the contact sealing device 7 is within the operating range. After the rotation speed of multiple layers is superimposed, the linear velocity of the outer side of the lifting plate 2 can be reached, so that the air cushion wall can safely use the contact rotary sealing device 7.

[0038] Example 3: The various device structures in this example, especially the installation methods of rotor 10 and rotor shaft 9, can be referenced from the installation method of rotor 10 and rotor shaft 9 in Example 3 of the upper frame air cushion support rotor device proposed in patent publication number CN223928172U. Based on Example 2, a second thrust bearing 24 is provided between the upper frame 101 and the fixed synchronization device 14, and between the fixed synchronization device 14 and the rotary synchronization device 16. Due to the presence of the second thrust bearing 24, the rotary synchronization device 16 and rotor shaft 9, and the fixed synchronization device 14 and rotor shaft 9 are rotatably connected through bearings that only bear radial loads.

[0039] This embodiment differs from Embodiment 3 in that the seal between the upper frame 101 and the rotor shaft 9 is also a contact seal 7, and a thrust bearing supporting the rotor is installed at the lower part of the rotor. Other devices are basically the same.

[0040] A rotating air cushion sleeve 26 is also installed on the outer side of the rotating air cushion wall 6. With the rotating air cushion sleeve 26, when wear occurs, only the rotating air cushion sleeve 26 needs to be replaced.

[0041] The side air cushion wall of the air cushion chamber 3 is composed of a multi-layered air cushion wall structure consisting of a fixed air cushion wall 5 and a rotating air cushion wall 6. A fixed air cushion wall 5 is fixed to the upper part of the upper frame 101. An additional fixed air cushion wall 5 is located inside the fixed air cushion wall 5. An elastic sealing device 15 is provided between the two layers of fixed air cushion walls 5. The inner fixed air cushion wall 5 is fixed to the synchronizing device 14. Above the fixed air cushion wall 5 is a rotating air cushion wall 6, which is fixed to the synchronizing device 16, allowing the rotating air cushion wall 6 to rotate around an axis.

[0042] The upper frame 101 is also equipped with a motor 800. The motor 800 has a disc-shaped drive wheel 801 that contacts the rotating air cushion wall 6. The disc drive wheel 801 drives the rotating air cushion wall 6 by friction. In this way, the motor 80 can control the rotation speed of the air cushion wall 6 within the required range. The optimal control is to reach half the rotation speed of the lifting plate 2.

[0043] In this embodiment, since the diameter of the fixed air cushion wall 5 is larger than the diameter of the lifting plate 2, the force exerted on the rotating air cushion wall 6 by the fixed air cushion wall 5 will be greater than the force exerted by the lifting plate 2, and the rotation speed will be less than the required speed. Therefore, the rotating air cushion wall 7 needs to increase the rotation speed of the rotating air cushion wall 6 through the motor 800 in order to ensure that the required speed is achieved.

[0044] When in use, the air cushion chamber 3 is inflated. Since the rotation speed of each layer of air cushion wall is different, the rotation speed difference between each layer of air cushion wall can ensure that the linear speed of the contact sealing device is within the operating range. After the rotation speed of multiple layers is superimposed, the linear speed of the outer side of the lifting plate 2 can be reached, so that the air cushion wall can be safely used with the contact rotary sealing device 7.

[0045] In this embodiment, if only one layer of fixed air cushion wall 5 is provided, a thrust bearing can also be provided between the base 1 and the rotation synchronization device 16 to support the rotation synchronization device 16.

[0046] In actual use, the drive wheel 801 or drive wheel 802 can also be driven by gears, belts or other means to drive the air cushion wall 6.

[0047] The speed control device 8 can also be any device that can control the speed of the rotating air cushion wall 6. For example, the air cushion wall 6 and the air cushion wall 6 can be rotated at a certain ratio by a gear device.

[0048] Because of the good contact sealing effect, a valve can be installed, which closes after inflation and opens again for inflation when needed.

[0049] Because of the good contact sealing effect, an air tank can also be installed. Alternatively, a valve can be installed so that an air compressor is not needed after inflation.

[0050] In actual products, the lifting plate 2 and the rotor 10 can be manufactured as a single piece. The lifting plate 2 can also adopt various complex lifting plate structures from existing related patents.

[0051] In actual products, the air cushion wall and the synchronization device can also be manufactured as a single unit.

[0052] In actual products, when the air cushion pressure is very high, devices such as labyrinth seals can be used to help reduce the pressure.

[0053] The above are merely preferred embodiments of the present invention.

Claims

1. A device for supporting a rotor with a multi-layered, variable-velocity air cushion wall, characterized in that, The air cushion chamber (3) is formed by a base (1), a lifting plate (2) and an air cushion wall. The air cushion chamber (3) is connected to an air supply device (4). The air cushion wall includes a rotating air cushion wall (6) and a fixed air cushion wall (5) installed on the base (1). At least one layer of rotating air cushion wall (6) is provided between the fixed air cushion wall (5) and the lifting plate (2). The rotating air cushion wall (6) rotates around the rotor shaft (9). The lifting plate (2) and the closest rotating air cushion wall (6) are sealed by a contact-type rotary sealing device (7), and the rotating air cushion wall (6) and the fixed air cushion wall (5) are sealed by a contact-type rotary sealing device (7). The rotating air cushion wall (6) is connected to a speed control device (8). The speed control device (8) is used to control the rotation speed of the rotating air cushion wall (6) that is closer to the lifting plate (2) to be higher. The lifting plate (2) is connected to the rotor shaft (9) and the rotor (10).

2. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, A first thrust bearing (11) is provided on the base (1). The first thrust bearing (11) is concentric with the rotor shaft (9). The rotating air cushion wall (6) is installed on the first thrust bearing (11) and rotates around the rotor shaft (9).

3. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, The rotating air cushion wall (6) is connected to the rotor shaft (9) or the lifting plate (2) by a rotating synchronization device (16), and the rotating synchronization device (16) is rotatably connected to the rotor shaft (9) or the lifting plate (2).

4. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, The fixed air cushion wall (5) includes two layers. The inner fixed air cushion wall (5) is connected to the rotor shaft (9) or the lifting plate (2) by a fixed synchronization device (14). An elastic sealing device (15) is provided between the two fixed air cushion walls (5). The fixed synchronization device (14) is rotatably connected to the rotor shaft (9) or the lifting plate (2).

5. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 4, characterized in that, A second thrust bearing (24) is provided between the bottom wall (1) and the fixed synchronization device (14), and between the fixed synchronization device (14) and the rotary synchronization device (16).

6. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, The speed control device (8) includes a motor (800), the input shaft of which is connected to a drive wheel (801), and the drive wheel (801) is connected to the rotating air cushion wall (6) via transmission.

7. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, The speed control device (8) includes a generator (803), the output shaft of which is connected to a second drive wheel (802), and the second drive wheel (802) is connected to the rotating air cushion wall (6) via a transmission.

8. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, A rotating air cushion sleeve (26) is also installed on the outside of the rotating air cushion wall (6).

9. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, A lifting plate sleeve (23) is also installed on the outside of the lifting plate (2).

10. The device for supporting a rotor with a multi-layered, variable-velocity air cushion wall according to claim 1, characterized in that, When the rotating air cushion wall (6) has two or more layers, the adjacent rotating air cushion walls (6) are sealed by a contact-type rotary sealing device (7).

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