Upper rack air cushion supporting rotor device

Abstract

The utility model discloses an upper frame air cushion support rotor device, which is characterized in that an air cushion device is arranged above a rotor, an air cushion wall of the air cushion device is specifically arranged at the top of an upper frame, a hovering disc, the air cushion wall and the upper frame enclose an air cushion chamber to form the air cushion device, and the upper end of a rotor shaft penetrates through a through hole of the upper frame. The hovering disc lifts the rotor through the rotor shaft, the hovering disc and the rotor shaft can synchronously rotate, the second rotary sealing device is arranged between the rotor shaft and the upper rack to guarantee the sealing performance of the air cushion chamber, the scheme that the upper rack is matched with the air cushion device to hang the rotor is achieved through the structure, and the whole device is arranged on the upper portion, so that maintenance is easy; meanwhile, the supporting device is arranged above the rotor, and the gravity center of the rotor can be lowered, so that the stability is improved, and the rotor has the possibility of realizing a higher rotating speed.

Description

Technical Field

[0001] This utility model belongs to the field of air cushion support rotor devices such as air cushion flywheel energy storage, and particularly relates to an upper frame air cushion support rotor device. Background Technology

[0002] Currently, all of our company's air cushion flywheel technical solutions involve the air cushion device being located below the rotor, directly supporting the flywheel. In this type of solution, the flywheel energy storage device is typically installed in an underground well for safety reasons. Furthermore, large flywheel energy storage devices generally require on-site assembly. After on-site assembly, because the air cushion and other components are below the flywheel, smaller flywheel energy storage solutions, to reduce costs, can only use small wells. This makes maintenance and repair of the air cushion device in the equipment inconvenient, especially since the flywheel rotor has a long maintenance cycle. Therefore, placing the air cushion device above the flywheel can avoid these problems. If the direction of the air cushion flywheel energy storage device is directly reversed, the air cushion will not function properly, thus requiring a redesign of the installation structure between the air cushion and the flywheel rotor. Utility Model Content

[0003] (1) Technical problem to be solved: The existing scheme of directly supporting the upper flywheel by the air cushion device has the defect of being inconvenient to maintain and repair the air cushion device in the equipment. This utility model provides an upper frame air cushion support rotor device that can realize the placement of the air cushion above the flywheel rotor.

[0004] (2) The technical solution adopted by this utility model is as follows:

[0005] An upper frame air cushion support rotor device includes an air compressor (18), an air cushion device (1), and a rotor (2), and also includes an upper frame (3). The air cushion device (1) is located above the rotor (2). The air cushion device (1) includes an air cushion wall (4) and a lifting plate (5). The air cushion wall (4) is located on the top of the upper frame (3), and the lifting plate (5) is located inside the air cushion wall (4). The lifting plate (5), the air cushion wall (4), and the upper frame (3) form an air cushion chamber (7). The machine (18) supplies air to the air cushion chamber (7). A rotary sealing device (8) is provided between the lifting plate (5) and the inner wall of the air cushion wall (4). The rotor (2) is coaxially fixedly connected to the rotor shaft (9). A through hole (10) is provided in the middle of the upper frame (3). The upper end of the rotor shaft (9) is connected to the lifting plate (5) through the through hole (10). A rotary sealing device (11) is provided between the rotor shaft (9) and the upper frame (3). The lifting plate (5) can rotate synchronously with the rotor shaft (9).

[0006] A further technical solution is that the upper end of the rotor shaft (9) passes through the lifting plate (5), and a thrust head (12) is fixed at the upper end of the rotor shaft (9), with the bottom of the thrust head (12) contacting the top of the lifting plate (5).

[0007] A further technical solution is that an elastic gasket (58) is provided between the thrust head (12) and the lifting plate (5).

[0008] A further technical solution is that the upper part of the rotor shaft (9) is a stepped shaft, and the top of the lifting plate (5) contacts the shoulder of the rotor shaft (9).

[0009] A further technical solution is that an elastic gasket (58) is provided between the shoulder of the rotor shaft (9) and the lifting plate (5).

[0010] A further technical solution is that a thrust bearing (20) is provided between the lifting plate (5) and the upper frame (3).

[0011] A further technical solution is that a tray (16) is provided on the rotor shaft (9), the upper part of the tray (16) is in contact with the lifting plate (5), and the tray (16) lifts the lifting plate (5).

[0012] A further technical solution is that a sealing sleeve (22) is fixedly installed in the through hole (10) of the upper frame (3), and a rotary sealing device (11) is installed between the sealing sleeve (22) and the rotor shaft (9).

[0013] A further technical solution is that a radial bearing (21) is provided between the upper frame (3) and the rotor shaft (9).

[0014] A further technical solution is that a rotor housing (55) is provided outside the rotor (2), the rotor shaft (9) passes through the top of the rotor housing (55), and a rotary sealing device (63) is provided at the part where the rotor housing (55) and the rotor shaft (9) are connected.

[0015] (3) Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: by setting the air cushion device above the rotor, the air cushion wall of the specific air cushion device is set at the top of the upper frame, the lifting plate is set inside the air cushion wall, the lifting plate, the air cushion wall and the upper frame form an air cushion chamber to form an air cushion device, the upper end of the rotor shaft is connected to the lifting plate through the through hole, the lifting plate can rotate synchronously with the rotor shaft, and a rotary sealing device is set between the rotor shaft and the upper frame to ensure the airtightness of the air cushion chamber. Through the above structure, the solution of using the upper frame to suspend the rotor with the air cushion device is realized. The entire device is above, so maintenance is easy. In addition, there is no need to dig a larger pit. At the same time, a support device is set above the rotor, and the rotor can improve stability at the bottom, so the rotor may achieve a higher speed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the upper part of Embodiment 2 of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of Embodiment 3 of this utility model;

[0019] Figure 4 yes Figure 3 Enlarged view of a local structure.

[0020] Attached reference numerals: 1. Air cushion device; 2. Rotor; 3. Upper frame; 4. Air cushion wall; 5. Lifting plate; 6. Sealing gasket; 7. Air cushion chamber; 8. Rotary sealing device one; 9. Rotor shaft; 10. Through hole; 11. Rotary sealing device two; 12. Thrust head; 15. Small thrust head; 16. Tray; 17. Housing; 18. Air compressor; 20. Thrust bearing; 21. Radial bearing; 22. Sealing sleeve; 30. Force-bearing plate; 31. Reinforcing rib; 32. Upper plate; 33. Central body; 50. Electric motor / generator; 51. Stator; 52. Sealing chassis; 53. Base; 54. Brake; 55. Rotor housing; 56. Edge guard plate; 57. Motor frame; 58. Elastic gasket; 61. Labyrinth seal device; 62. Carbon ring seal; 63. Rotary sealing device three Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-4 As shown.

[0023] Example 1

[0024] An upper frame air cushion support rotor device includes an air compressor 18, an air cushion device 1, and a rotor 2, and also includes an upper frame 3. The air cushion device 1 is located above the rotor 2. The air cushion device 1 includes an air cushion wall 4 and a lifting plate 5. The air cushion wall 4 is located on the top of the upper frame 3, and the lifting plate 5 is located inside the air cushion wall 4. The lifting plate 5, the air cushion wall 4, and the upper frame 3 form an air cushion chamber 7. The air compressor 18 supplies air to the air cushion chamber 7. A rotary sealing device 11 is provided between the lifting plate 5 and the inner wall of the air cushion wall 4. The rotor 2 is coaxially fixedly connected to a rotor shaft 9. A through hole 10 is provided in the middle of the upper frame 3. The upper end of the rotor shaft 9 passes through the through hole 10 and is connected to the lifting plate 5. A rotary sealing device 211 is provided between the rotor shaft 9 and the upper frame 3. The lifting plate 5 can rotate synchronously with the rotor shaft 9.

[0025] A pit is dug in the ground, and an upper frame 3 is fixed on the pit. In this embodiment, the upper frame 3 adopts a fully sealed structure of a metal disc. An air cushion device 1 is provided above the upper frame 3. The air cushion device 1 consists of a lifting plate 5, an air cushion wall 4, and an air cushion chamber 7. The air cushion wall 4 is located on the top of the upper frame 3, and the lifting plate 5 is located inside the air cushion wall 4. The lifting plate 5, the air cushion wall 4, and the upper frame 3 form the air cushion chamber 7. The air compressor 18 supplies air to the air cushion chamber 7. A rotary sealing device 8 is provided between the inner wall of the lifting plate 5 and the air cushion wall 4. In this embodiment, the rotary sealing device 8 is a labyrinth-type sealing device 61 on the side of the lifting plate 5. Since the air cushion device 1 is installed on the upper part of the rotor 2, it does not affect the stability of the rotor 2. Therefore, a particularly thick lifting plate 5 can be used, and the labyrinth-type sealing device is also longer. This makes the rotor 2 lighter, and when the air cushion pressure is not high, the manufacturing of this embodiment is relatively simple.

[0026] The upper frame 3 has a through hole 10 in the middle. The upper end of the rotor shaft 9 passes through the through hole 10 and is fixedly connected to the lifting plate 5. The lifting plate 5 can be fixed to the rotor shaft 9 by various means such as keys or heat sleeves.

[0027] The rotor 2 is coaxially and fixedly connected to the rotor shaft 9. The lower part of the rotor shaft 9 is a stepped shaft, and the lower part of the rotor 2 is in contact with the shaft shoulder.

[0028] A thrust bearing 20 is installed between the lower part of the lifting plate 5 and the upper frame 3. When not inflated, the lifting plate 5 is supported by the thrust bearing 20. After inflation, the thrust bearing 20, together with the air cushion, lifts the rotor 2 through the lifting plate 5 and the rotor shaft 9.

[0029] A rotary sealing device 2 11 is provided between the upper frame 3 and the rotor shaft 9. The rotary sealing device 2 11 is specifically composed of a labyrinth seal 61 and a carbon ring seal 62, with the labyrinth seal 61 at the upper part and the carbon ring seal 62 at the lower part.

[0030] A radial bearing 21 is provided between the lower part of the upper frame 3 and the rotor shaft 9. This radial bearing 21 is a non-contact electromagnetic bearing. The lower part of the rotor 2 is an electric motor / generator 50, and the shaft of the electric motor / generator 50 is coaxially connected to the rotor 2.

[0031] A housing 17 is provided above the upper frame 3, which covers the entire air cushion device 1.

[0032] Example 2

[0033] In this embodiment, rotor 2 is the rotor 2 of a vertical generator or a hydro-generator. The lower, well-known structure of the vertical generator or hydro-generator is not shown in the figure. The upper frame 3 is fixed to the upper part of the stator 51 of the vertical generator or hydro-generator. The upper frame 3 can adopt various frame structures found in hydro-generators. A sealed base 52 is provided above the upper frame 3. The sealed base 52 is an airtight disc, allowing the upper frame 3 to adopt the commonly used unsealed center body and support arm structure of hydro-generators.

[0034] An air cushion device 1 is installed above the upper frame 3. The air cushion device 1 consists of a lifting plate 5, an air cushion wall 4, and an air cushion chamber 7. The air cushion wall 4 is installed on the sealed base plate 52 on the upper frame 3. The lifting plate 5 is located inside the air cushion wall 4. The lifting plate 5, the air cushion wall 4, and the sealed base plate 52 on the upper frame 3 form the air cushion chamber 7. The air compressor 18 supplies air to the air cushion chamber 7. A rotary sealing device 8 is installed between the lifting plate 5 and the inner wall of the air cushion wall 4. In this embodiment, the rotary sealing device 8 is a labyrinth seal 61 between the side and top of the lifting plate and a carbon ring seal 62 between the middle of the air cushion wall 4 and the rotor shaft 9. This sealing effect is good and can seal very high air pressure, making it suitable for heavier rotors 2.

[0035] A through hole 10 is provided in the middle of the upper frame 3. The upper end of the rotor shaft 9 passes through the through hole 10. The upper part of the rotor shaft 9 is a stepped shaft. The upper part of the lifting plate 5 contacts the shoulder of the rotor shaft 9. The upper part of the rotor shaft 9 may be an excitation winding or other device. The through hole in the middle of the lifting plate 5 is a tapered hole. A sealing gasket 6 is provided in the gap between the lower part of the through hole of the lifting plate 5 and the rotor shaft 9. The sealing gasket 6 ensures the sealing of the air cushion chamber 7.

[0036] A thrust bearing 20 is installed between the lower part of the lifting plate 5 and the upper frame 3.

[0037] A rotary sealing device 2 11 is provided between the upper frame 3 and the rotor shaft 9. The rotary sealing device 2 11 is specifically composed of a labyrinth seal 61 and a carbon ring seal 62, with the labyrinth seal 61 at the upper part and the carbon ring seal 62 at the lower part.

[0038] A radial bearing 21 is provided between the upper part of the upper frame 3 and the rotor shaft 9. This radial bearing is a mechanical bearing.

[0039] An outer casing 17 is provided above the upper frame 3, which covers the entire air cushion device 1.

[0040] Example 3

[0041] A pit is dug in the ground, and a metal edge plate 56 is fixed to the edge of the pit. When the flywheel is heavy, the metal edge plate 56 provides better support for the upper frame 3. The upper frame 3 is fixed on the metal edge plate 56, and the upper frame 3 can adopt various frame structures used in hydro-generators. A motor frame 57 is installed on the upper frame 3, and the electric motor / generator 50 is located above the motor frame 57. A small thrust head 15 is installed on the rotor shaft 9 below the electric motor / generator 50. A radial bearing 21, which is a mechanical bearing, is located between the upper part of the motor frame 57 and the small thrust head 15. A thrust bearing 20 is located between the lower part of the small thrust head 15 and the motor frame 57. The radial bearing 21 and the thrust bearing 20 are installed outside the air cushion device for easy maintenance.

[0042] In this embodiment, the lifting plate 5 consists of a force-bearing plate 30, reinforcing ribs 31, an upper plate 32, and a central body 33. From top to bottom, the components are the upper plate 32, reinforcing ribs 31, force-bearing plate 30, and the central body 33, which is shaped like an inverted cup. This design follows the same principle as described in "Publication (Announcement) No.: CN118998265A: An Air Cushion Chamber 7 and Air Cushion Flywheel Device Using a Split-Type Lifting Plate 5". This structure can withstand greater forces with a relatively lightweight design.

[0043] An air cushion device 1 is installed above the upper frame 3. The air cushion device 1 consists of a lifting plate 5, an air cushion wall 4, and an air cushion chamber 7. The air cushion wall 4 is installed on the sealed base plate 52 on the upper frame 3. The lifting plate 5 is located inside the air cushion wall 4. The lifting plate 5, the air cushion wall 4, and the sealed base plate 52 on the upper frame 3 form the air cushion chamber 7. The air compressor 18 supplies air to the air cushion chamber 7. A rotary sealing device 8 is installed between the lifting plate 5 and the inner wall of the air cushion wall 4. In this embodiment, the rotary sealing device 8 is a labyrinth seal 61 between the side and top of the lifting plate and a carbon ring seal 62 between the middle of the air cushion wall 4 and the rotor shaft 9. This sealing effect is good and can seal very high air pressure, making it suitable for heavier rotors 2.

[0044] A thrust head 12 is fixedly mounted on the rotor shaft 9. An elastic pad 58 is provided at the lower part of the thrust head 12. The lifting plate 5 transmits the air cushion force to the thrust head 12 through the elastic pad 58, thereby lifting the rotor 2 through the rotor shaft 9.

[0045] A tray 16 is also installed and fixed on the rotor shaft 9. The center body 33 overlaps on the tray 16, that is, the upper part of the tray 16 contacts the lifting plate 5. In this way, when the air cushion chamber 7 is not inflated, the lifting plate 5 is supported by the tray 16.

[0046] A sealing sleeve 22 is fixedly installed inside the through hole 10 of the upper frame 3. A labyrinth-type sealing device 61 is provided on both the inner and outer sides of the sealing sleeve 22. A carbon ring seal 62 is provided on the lower side of the labyrinth-type sealing device 61. The labyrinth-type sealing device 61 and the carbon ring seal 62 constitute a rotary sealing device 21. The sealing sleeve 22 increases the length of the labyrinth-type sealing device, making the labyrinth sealing effect better.

[0047] The rotor shaft 9 is fixed with the rotor 2. The rotor shaft 9 at the lower part of the rotor 2 is fixed with an inverted small thrust head 15, which assists in supporting the rotor 2.

[0048] A sealed rotor housing 55 is also fixed to the lower part of the upper frame 3. A sealing gasket 6 is provided between the edge guard plate 56 and the rotor housing 55, thereby sealing the rotor housing 55 around its perimeter. A rotary sealing device 63 is provided between the middle of the rotor housing 55 and the rotor shaft 9. The rotary sealing device 63 can be a magnetohydrodynamic sealing device or a carbon ring seal. This allows helium to be filled into the rotor housing 55, reducing wind resistance, and also allows for vacuuming, reducing energy consumption.

[0049] The bottom of the crater is also equipped with a base 53, and a radial bearing 21 is also installed between the middle of the base 53 and the rotor shaft 9. This radial bearing 21 is a non-contact electromagnetic bearing. A brake 54 is also installed on the base 53. The brake 54 functions in the same way as the brake in a hydro-generator.

[0050] The above are merely preferred embodiments of this utility model.

[0051] Various technologies in different schemes can be used selectively and in combination. For example, in Embodiment 1, the lower part of the lifting plate 5 may not use the thrust bearing 20, but be supported by the electric motor / generator 50, and the lower part of the lifting plate 5 may be equipped with a tray 16, etc.

[0052] In Example 2, an elastic shim 58 can also be provided between the shaft shoulder and the lifting plate.

[0053] The rotary sealing device 1 (8), rotary sealing device 2 (11), and rotary sealing device 3 (63) in this utility model can be any type of rotary sealing device. For example, in this embodiment of the utility model, a honeycomb seal can be used instead of a labyrinth seal. Alternatively, it can be a combination of multiple sealing devices, such as a combination of a labyrinth seal and a magnetohydrodynamic seal.

[0054] The radial bearing 21 of this utility model can be a mechanical bearing or an electromagnetic bearing. The thrust bearing can also be an axial electromagnetic bearing, or an axial electromagnetic bearing can be combined with a thrust bearing.

[0055] The lifting plate in this utility model can be any of the lifting plate structures in the various patents applied for by our company.

[0056] In this embodiment, the lifting plate 5 and the rotor 2 can be connected to the rotor shaft 9 using various axial positioning methods.

Claims

1. A rotor support device for an upper frame, comprising an air compressor (18), an air cushion device (1), and a rotor (2), characterized in that, It also includes an upper frame (3), the air cushion device (1) is located above the rotor (2), the air cushion device (1) includes an air cushion wall (4) and a cushioning plate (5), the air cushion wall (4) is set on the top of the upper frame (3), the cushioning plate (5) is set inside the air cushion wall (4), the cushioning plate (5), the air cushion wall (4) and the upper frame (3) form an air cushion chamber (7), the air compressor (18) supplies air to the air cushion chamber (7), and a rotary sealing device (8) is provided between the cushioning plate (5) and the inner wall of the air cushion wall (4); the rotor (2) is coaxially fixedly connected to the rotor shaft (9), a through hole (10) is provided in the middle of the upper frame (3), the upper end of the rotor shaft (9) passes through the through hole (10) and is connected to the cushioning plate (5), a rotary sealing device (11) is provided between the rotor shaft (9) and the upper frame (3), and the cushioning plate (5) can rotate synchronously with the rotor shaft (9).

2. The upper frame air cushion support rotor device according to claim 1, characterized in that, The upper end of the rotor shaft (9) passes through the lifting plate (5), and a thrust head (12) is fixed at the upper end of the rotor shaft (9). The bottom of the thrust head (12) contacts the top of the lifting plate (5).

3. The upper frame air cushion support rotor device according to claim 2, characterized in that, An elastic gasket (58) is provided between the thrust head (12) and the lifting plate (5).

4. The upper frame air cushion support rotor device according to claim 1, characterized in that, The upper part of the rotor shaft (9) is a stepped shaft, and the top of the lifting plate (5) is in contact with the shoulder of the rotor shaft (9).

5. The upper frame air cushion support rotor device according to claim 4, characterized in that, An elastic gasket (58) is provided between the shoulder of the rotor shaft (9) and the lifting plate (5).

6. A rotor support device for an upper frame according to any one of claims 1-5, characterized in that, A thrust bearing (20) is provided between the lifting plate (5) and the upper frame (3).

7. A rotor support device for an upper frame according to any one of claims 1-5, characterized in that, A tray (16) is provided on the rotor shaft (9). The upper part of the tray (16) contacts the lifting plate (5), and the tray (16) lifts the lifting plate (5).

8. A rotor support device for an upper frame according to any one of claims 1-5, characterized in that, A sealing sleeve (22) is fixedly installed in the through hole (10) of the upper frame (3), and a rotary sealing device (11) is installed between the sealing sleeve (22) and the rotor shaft (9).

9. A rotor support device for an upper frame according to any one of claims 1-5, characterized in that, A radial bearing (21) is provided between the upper frame (3) and the rotor shaft (9).

10. A rotor support device for an upper frame according to any one of claims 1-5, characterized in that, The rotor (2) is also provided with a rotor housing (55), the rotor shaft (9) passes through the top of the rotor housing (55), and a rotary sealing device (63) is provided at the connection between the rotor housing (55) and the rotor shaft (9).

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