Device for supporting rotor through synchronous vibration of air cushion wall and hovering disc in air cushion

Abstract

The utility model discloses a device for supporting a rotor in a synchronous vibration mode of an air cushion wall and a hovering disc in an air cushion, and due to the synchronous vibration of the air cushion wall and the hovering disc, a gap between the hovering disc and the air cushion wall can be very small, so that the sealing effect is better, the air cushion wall can be ensured not to be contacted with the hovering disc, and the safety is not influenced. The independent axial bearing is arranged between the top of the hovering disc and the inner top wall of the air cushion wall, so that the heavier metal air cushion wall can be used, the metal air cushion wall has better machining precision, the machining precision is high, and the gap between the air cushion wall and the hovering disc can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of flywheel energy storage devices, and in particular relates to a device for synchronously vibrating and supporting a rotor in an air cushion by the air cushion wall and the cushion lifting plate. Background Technology

[0002] In the scheme of a synchronously stabilized sealing frame type air cushion flywheel energy storage device disclosed in patent number ZL202310559977.6, the flywheel synchronously stabilized sealing frame must cooperate with the fixed frame, so the diameter of the air cushion cannot be too large. Therefore, a subsequent innovation was made with patent number CN117927612B, entitled "An Air Cushion Flywheel Energy Storage Device". However, in this technical solution, the air cushion wall and the lifting plate cannot vibrate synchronously. Since the flywheel inevitably vibrates when it rotates in the flywheel energy storage device, the lifting plate will vibrate together with the flywheel when it rotates along with the shaft. When the air cushion wall is fixed, the gap of the labyrinth seal between the air cushion wall and the lifting plate cannot be too small, otherwise they will touch each other, which will affect safety. A safety gap must be left, but if the gap is too large, the sealing effect will be poor. Therefore, if the air cushion wall vibrates synchronously with the lifting plate (but does not rotate), the gap of the labyrinth seal can be very small, so the sealing effect is better. Utility Model Content

[0003] (1) Technical problem to be solved: In view of the existing scheme where the air cushion wall cannot vibrate synchronously with the lifting plate, the gap of the labyrinth seal between the air cushion wall and the lifting plate cannot be too small, otherwise they will collide and affect safety. A safety gap must be left, but if the gap is too large, the sealing effect will be poor. This utility model provides a device for synchronously vibrating the air cushion wall and the lifting plate to support the rotor in an air cushion, which can realize the synchronous vibration of the air cushion wall and the lifting plate and can make up for the above defects.

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

[0005] A device for synchronously vibrating and supporting a rotor in an air cushion, comprising a rotor, a rotor shaft, an air compressor, an air cushion wall, and an air cushion plate located inside the air cushion wall. A sealing base is provided at the bottom of the air cushion wall, a first rotary sealing device is provided between the air cushion plate and the air cushion wall, and a flexible sealing device is provided between the air cushion wall and the sealing base. The air cushion wall, the air cushion plate, and the sealing base form an air cushion chamber. The air compressor supplies air to the air cushion chamber. The rotor and the rotor shaft are coaxially fixed, and the rotor shaft is connected to the air cushion plate. An installation hole is provided at the center of the top of the air cushion wall, and a radial bearing is provided inside the installation hole. The air cushion wall is connected to the rotor shaft through the radial bearing, or the air cushion wall is connected to the air cushion plate through the radial bearing.

[0006] A further technical solution is that an axial bearing is provided between the top of the lifting plate and the inner top wall of the air cushion wall.

[0007] A further technical solution is that the air cushion wall is a barrel-shaped sealed wall structure with the opening facing downwards, and the top of the barrel-shaped sealed wall is provided with air cushion wall reinforcing ribs.

[0008] A further technical solution is that the air cushion wall is formed by a sealing wall, supporting spokes and a central ring, the central ring and the sealing wall are fixedly connected by supporting spokes, the mounting hole is located in the middle of the central ring, and the first rotary sealing device is located between the sealing wall and the cushion lifting plate.

[0009] A further technical solution involves placing the axial bearing between the bottom of the central ring and the top of the lifting plate.

[0010] A further technical solution is that the lifting plate is formed by a force-bearing plate, lifting plate reinforcing ribs, an upper plate, and a central body of the lifting plate. The lifting plate reinforcing ribs are fixedly connected between the force-bearing plate and the upper plate, and the central body of the lifting plate passes through the upper plate and the force-bearing plate.

[0011] A further technical solution is that the lifting plate is formed by a disc and a central body of the lifting plate, with the central body of the lifting plate fixed in the middle of the solid disc.

[0012] A further technical solution is that the top and bottom of the air cushion wall are connected to the central ring by support spokes, and radial bearings are provided between the central ring of the upper part of the cushioning plate and the upper part of the central body of the cushioning plate, and between the central ring of the lower part of the cushioning plate and the lower part of the central body of the cushioning plate.

[0013] A further technical solution involves installing a spring between the air cushion wall and the sealed chassis.

[0014] A further technical solution is that a support platform is provided between the lower part of the air cushion wall and the sealed chassis.

[0015] (3) Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] Because the air cushion wall and the lifting plate vibrate synchronously, the gap between the lifting plate and the air cushion wall can be very small, which results in a better sealing effect and ensures that the air cushion wall and the lifting plate will not come into contact, thus not affecting safety.

[0017] An independent axial bearing is installed between the top of the lifting plate and the inner top wall of the air cushion wall. This allows the use of a heavier metal air cushion wall, which has better machining accuracy. Higher machining accuracy reduces the gap between the air cushion wall and the lifting plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0019] Figure 2This is the connection between the outer ring supporting the center ring of the spokes in Embodiment 1 of this utility model;

[0020] Figure 3 This is a schematic diagram of one embodiment of the air cushion portion in Embodiment 2 of this utility model;

[0021] Figure 4 This is a schematic diagram of another embodiment of the air cushion portion in Embodiment 3 of this utility model;

[0022] Figure 5 This is a schematic diagram of the air cushion wall structure in Embodiment 3 of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of Embodiment 4 of this utility model.

[0024] In the diagram, the following are labeled: 1. Air cushion wall; 2. First rotary seal device; 3. Lifting plate; 4. Electric motor / generator; 5. Thrust bearing; 6. Radial bearing; 7. Rotor shaft; 8. Thrust head; 9. Second rotary seal device; 10. Mounting hole; 11. Motor frame; 12. Housing; 14. Rotor; 15. Upper frame; 16. Flexible sealing device; 17. Brake; 18. Guide bearing; 19. Base; 20. Air cushion chamber; 21. Seal. 21. Chassis; 22. Air compressor; 23. Axial bearing; 25. Spring; 26. Support platform; 28. Sealing gasket; 29. ​​Bearing bracket; 30. Support plate; 101. Sealing wall; 102. Outer ring; 103. Support spokes; 105. Central ring; 106. Air cushion wall reinforcing rib; 107. Barrel-shaped sealing wall; 301. Force-bearing plate; 302. Lifting plate reinforcing rib; 303. Upper plate; 305. Lifting plate center body; 306. Disc. Detailed Implementation

[0025] 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.

[0026] like Figures 1-6 As shown.

[0027] In the following embodiments, the air cushion device structure is similar to that in the patents 202310559977.6 (A Synchronous Stable Sealed Frame Type Air Cushion Flywheel Energy Storage Device, Patent No.: 202410323113.9, 202411271154.4, 202411271154.4 (An Air Cushion Chamber and Air Cushion Flywheel Device Using a Split-Type Lifting Plate, Patent No.: 202421788504.X, and 202421788504.X (An Air Cushion Supported Rotor Device with Radial Bearing Located Above the Air Cushion Chamber).

[0028] Example 1

[0029] A device for synchronously vibrating and supporting a rotor in an air cushion, comprising a rotor 14, a rotor shaft 7, an air compressor 22, an air cushion wall 1, and an air cushion disk 3 located inside the air cushion wall 1. A sealing base 21 is provided at the bottom of the air cushion wall 1. A first rotary sealing device 2 is provided between the air cushion disk 3 and the air cushion wall 1. A flexible sealing device 16 is provided between the air cushion wall 1 and the sealing base 21. The air cushion wall 1, the air cushion disk 3, and the sealing base 21 form an air cushion chamber 20. The air compressor 22 supplies air to the air cushion chamber 20. The rotor 14 is coaxial with the rotor shaft 7. The rotor shaft 7 is fixed and connected to the lifting plate 3. A mounting hole 10 is provided at the center of the top of the air cushion wall 1. A radial bearing 6 is installed inside the mounting hole 10. The air cushion wall 1 is connected to the rotor shaft 7 through the radial bearing 6. The radial bearing 6 can be a deep groove ball bearing, cylindrical roller bearing, self-aligning ball bearing, self-aligning roller bearing, angular contact ball bearing, tapered roller bearing, etc. The radial bearing 6 can also be an axial-radial dual-function bearing, such as an axial-radial double-direction thrust ball bearing or a double-direction thrust tapered roller bearing.

[0030] A pit is dug in the ground, and an upper frame 15 is fixed on the pit. The air cushion device is located above the rotor 14. The upper frame 15 can adopt various frame structures used in hydro-generators. A motor frame 11 is mounted on the upper frame 15, and the motor / generator is located above the motor frame 11. A guide bearing 18 is installed in the middle of the upper frame 15. The rotor shaft 7 passes through the upper frame 15 and connects to the rotor 14. A second rotary seal device 9 is provided between the upper frame 15 and the rotor shaft 7. The second rotary seal device 9 is a combination of two sealing devices: a labyrinth seal at the top and a carbon ring seal at the bottom. A base 19 is also provided at the bottom of the pit, and a guide bearing 18 is also provided between the middle of the base 19 and the rotor shaft 7. A brake 17 is also provided on the base 19. The brake 17 functions in the same way as the brake 17 in a hydro-generator. A housing 12 is provided on top of the upper frame 15, covering the entire air cushion device.

[0031] The upper frame 15 also has an air cushion device, which consists of a lifting plate 3, an air cushion wall 1, a first rotary sealing device 2, an air compressor 22, and a sealing base 21 on the upper frame 15. The side of the air cushion wall 1, the top of the sealing base 21, and the bottom of the lifting plate 3 form an air cushion chamber 20. The first rotary sealing device 2 is provided between the side of the air cushion wall 1 and the lifting plate 3. In this embodiment, the first rotary sealing device 2 is a labyrinth seal device. In practical applications, it can be a honeycomb seal or other rotary sealing devices, and multiple sealing device combinations can also be used. The upper frame 15 can replace the sealing base 21. When the upper frame adopts a completely sealed structure, the two can be combined into one, without using a separate sealing base 21. The sealing base 21 can also be set on the top of the upper frame 15. A thrust bearing 5 is also provided between the lifting plate 3 and the sealing base 21 or the upper frame 15. A thrust head 8 is installed on the rotor shaft 7 above the lifting plate 3. The rotor shaft 7 passes through the upper frame 15 and is connected to the rotor 14.

[0032] In this embodiment, the air cushion wall 1 is formed by a sealing wall 101, an outer ring 102, supporting spokes 103, and a central ring 105. The central ring 105 and the outer ring 102 are fixedly connected by the supporting spokes 103. The outer ring 102, supporting spokes 103, and central ring can be machined as a whole or manufactured separately and then welded together. In this embodiment, the supporting spokes 103 are round tubes, and the central ring 105 is a circular ring with a hole of a certain depth drilled on the outer side. A round tube is inserted into the hole on the outer side of the circular ring, and the other side of the round tube is welded to the outer ring 102. The mounting hole 10 is located in the middle of the central ring 105, and the sealing wall 101 is fixed to the lower part of the outer ring 102. The first rotary sealing device 2 is located between the sealing wall 101 and the lifting plate 3, and the radial and axial direction 6 is set between the central ring 105 and the rotor shaft 7. The flexible sealing device 16 at the lower part of the sealing wall 101 is an elastic sealing gasket. When the rotor 14 vibrates, due to the radial bearing 6, the lifting plate 3, the rotor 14 and the air cushion wall 1 vibrate synchronously. That is, the air cushion wall 1 vibrates but does not rotate. The premise of this method is that the lifting plate 3 and the rotor 14 must be completely fixed to achieve synchronization.

[0033] Example 2,

[0034] Unlike Embodiment 1, the air cushion wall 1 is connected to the lifting plate 3 via a radial bearing 6. Furthermore, in this design, the lifting plate 3 is a split-type lifting plate consisting of a force-bearing plate 301, lifting plate reinforcing ribs 302, an upper plate 303, and a lifting plate center body 305. The force-bearing plate 301, lifting plate reinforcing ribs 302, upper plate 303, and the air cushion device structure in the patent (Patent No. 202421788504.X) for an air cushion support rotor device with a radial bearing located above the air cushion chamber, with the lifting plate center body 305 in the center, are similar. The upper hole of the lifting plate center body 305 mates with the rotor shaft 7, and the lower hole of the lifting plate center body 305 is larger than the rotor shaft 7. A sealing gasket 28 is placed between the lifting plate 3 and the rotor shaft 7 within the hole. A thrust bearing 5 is provided between the lower part of the lifting plate 3 and the upper frame 15.

[0035] The air cushion wall 1 consists of a sealing wall 101, supporting spokes 103, and a central ring 105. The central ring 105 is fixedly connected to the sealing wall 101 by the supporting spokes 103. A radial bearing 6 is provided in the middle of the central ring 105, and the radial bearing 6 is mounted on the central body 305 of the lifting plate. An independent axial bearing 23 is provided between the lower part of the central ring 105 and the central body 305 of the lifting plate to increase the axial load bearing capacity. The lower part of the sealing wall 101 is also provided with the same supporting spokes 103 and central ring 105, and the lower supporting spokes 105 are arranged in the gap between the bearing seats of the thrust bearing 5. A radial bearing 6 is provided between the lower part of the central ring 105 of the sealing wall 101 and the lower part of the central body 305 of the lifting plate, and an independent axial bearing is also provided between the upper part of the central ring 105 and the force-bearing plate 301. A spring 25 is also provided at the lower part of the sealing wall 101. Therefore, the sealing wall 101 can vibrate synchronously with the lifting plate 3 without rotating, which allows for a smaller gap. Since there are radial bearings 6 at the top and bottom, the force is better distributed. At the same time, the spring 25 and the axial bearing 23 can also provide upward support for the air cushion wall 1.

[0036] The advantage of this design is that the air cushion wall 1 is connected to the lifting plate 3 via radial bearings 6 at both the top and bottom. Therefore, it can be ensured that the air cushion wall 1 and the lifting plate 3 vibrate in perfect synchronization and that the force distribution is better.

[0037] Example 3

[0038] Based on Embodiment 2, in this embodiment, the air cushion wall 1 is formed by a barrel-shaped sealing wall 107, reinforcing ribs 106, an outer ring 102, supporting spokes 103, and a central ring 105. The top of the barrel-shaped sealing wall 107 is provided with air cushion wall reinforcing ribs 106, similar to the structure of Embodiment 1. The bottom of the barrel-shaped sealing wall 107 is provided with an outer ring 102, which is connected to the central ring 105 through supporting spokes 103. A radial bearing 6 is provided between the central ring 105 and the lifting plate 3. A support platform 2 is provided between the bottom of the outer ring 102 and the sealing base 21. 6. The support platform 26 can be fixed to the sealing chassis 21 or the upper frame 15. The top of the support platform 26 is connected to the air cushion wall 1 by rolling or sliding. The flexible sealing device 16 is set between the outer side of the barrel-shaped sealing wall 107 and the outer edge of the sealing chassis 21. Alternatively, the support platform 26 can be fixed to the air cushion wall 1. The bottom of the support platform 26 is connected to the sealing chassis 21 or the upper frame 15 by rolling or sliding. The support platform 26 can be a rolling support platform with rolling devices such as balls and wheels on the upper part; or it can be a sliding support platform. In order to meet the requirement of synchronous vibration of the air cushion wall 1 with the lifting plate 3 and to enable the support platform 26 to provide greater load-bearing capacity for the air cushion wall 1, the lifting plate 3 has a conical hole in the middle. There is a sealing gasket 28 between the lifting plate 3 and the rotor shaft 7 in the conical hole. The thrust head 8 is fixed on the rotor shaft 7 above the lifting plate 3. The air cushion wall 1 is connected to the lifting plate 3 through a radial bearing 6.

[0039] The advantage of this embodiment is that the sealing device is longer due to the use of a barrel-shaped sealing wall 107.

[0040] Example 4

[0041] Based on Embodiment 1, but with the difference that the air cushion wall 1 is a barrel-shaped sealing wall 107 structure with the opening facing downwards, the barrel-shaped sealing wall 107 has an outer ring 102 at the bottom, the outer ring 102 is connected to the central ring 105 through the support spokes 103, the central ring 105 and the disc 306 are provided with a radial bearing 6 and an independent axial bearing 23, the disc 306 is equivalent to an integral padding plate, the lower part of the outer ring 102 is provided with several support legs that contact the base 19, the flexible sealing device 16 is provided between the outer side of the barrel-shaped sealing wall 107 and the base 19, the sealing base 21 can be replaced by the base 19, in this example the upper part of the air cushion chamber 20 is similar to the air cushion device structure in the patent 202421788504.X a device for supporting a rotor 14 with a radial bearing 6 located above the air cushion chamber 20, the air cushion is set at the bottom of the rotor 14 and is used in the flywheel energy storage device.

[0042] The lifting plate 3 consists of a disc 306 and a central body 305, with the central body 305 fixed to the center of the solid disc 306. A support plate 30 is positioned above the central body 305. Above the support plate 30 are a bearing bracket 29 and a rotor 14. Below the rotor 14 is a brake 17. A guide bearing 18 is mounted on the rotor shaft 7. A housing 12 is mounted on the base 19. An electric motor / generator 4 is installed on the upper part of the rotor shaft 7. An air compressor 22 is also mounted on the upper part of the housing 12.

[0043] After the radial bearing 6 is installed in the mounting hole 10, it is connected to the center body 305 of the lifting plate. At this time, the air cushion wall 1 is connected to the center body 305 of the lifting plate through the radial bearing, and the support plate 30, rotor 14, lifting plate 3, and air cushion wall 1 vibrate synchronously.

[0044] The advantage of this embodiment is that it can be used in flywheel energy storage devices where the air cushion device is located below the rotor shaft, allowing the air cushion device to be used in more flywheel energy storage devices.

[0045] This invention can also be used in generators and other devices, in which the upper frame is generally located on the upper part of the stator.

[0046] The guide bearing in this invention can also be replaced by a radial electromagnetic bearing. The thrust bearing can also be replaced by an axial electromagnetic bearing. Alternatively, a combination of mechanical thrust bearings and axial electromagnetic bearings can be used, with the mechanical thrust bearing serving as a safety redundancy backup, and only the axial electromagnetic bearing used in daily operations.

[0047] The rotary sealing device 12 and rotary sealing device 29 in this utility model can be selected from various rotary sealing devices. For example, in the embodiment of this utility model, a honeycomb seal is used instead of a labyrinth seal. Alternatively, they can be a combination of multiple sealing devices, such as a combination of a labyrinth seal and a magnetohydrodynamic seal.

[0048] In this invention, the components can be manufactured separately or processed as a single piece. Alternatively, the components can be further divided into multiple parts for easier processing.

[0049] The above are merely preferred embodiments of this utility model. Various solutions can be used in combination. For example, various air cushion device solutions with the air cushion device below the rotor shaft can be used in the device with the air cushion device below the rotor shaft.

Claims

1. A device for synchronously vibrating and supporting a rotor in an air cushion, comprising a rotor (14), a rotor shaft (7), an air compressor (22), an air cushion wall (1), and an air cushion disk (3) located inside the air cushion wall (1). A sealing base (21) is provided at the bottom of the air cushion wall (1), a first rotary sealing device (2) is provided between the air cushion disk (3) and the air cushion wall (1), and a flexible sealing device (16) is provided between the air cushion wall (1) and the sealing base (21). The air cushion wall (1), the air cushion disk (3), and the sealing base (21) form an air cushion chamber (20). The air compressor (22) supplies air to the air cushion chamber (20). The rotor (14) and the rotor shaft (7) are coaxially fixed, and the rotor shaft (7) is connected to the air cushion disk (3). The device is characterized in that... The air cushion wall (1) has an installation hole (10) at the top center position. A radial bearing (6) is installed inside the installation hole (10). The air cushion wall (1) is connected to the rotor shaft (7) through the radial bearing (6), or the air cushion wall (1) is connected to the lifting plate (3) through the radial bearing (6).

2. The device for synchronously vibrating and supporting a rotor in an air cushion with the air cushion wall and the lifting plate as described in claim 1, characterized in that, An axial bearing (23) is provided between the top of the lifting plate (3) and the inner top wall of the air cushion wall (1).

3. The device for synchronously vibrating and supporting a rotor in an air cushion with the air cushion wall and the lifting plate as described in claim 2, characterized in that, The air cushion wall (1) is a barrel-shaped sealing wall (107) structure with the opening facing downward, and the top of the barrel-shaped sealing wall (107) is provided with air cushion wall reinforcing ribs (106).

4. The device for synchronously vibrating and supporting a rotor in an air cushion by means of the air cushion wall and the lifting plate as described in claim 1, characterized in that, The air cushion wall (1) is formed by a sealing wall (101), a support spoke (103) and a central ring (105). The central ring (105) and the sealing wall (101) are fixedly connected by the support spoke (103). The mounting hole (10) is located in the middle of the central ring (105). The first rotary sealing device (2) is located between the sealing wall (101) and the pad lifting plate (3).

5. The device for synchronously vibrating and supporting a rotor in an air cushion with the air cushion wall and the lifting plate as described in claim 4, characterized in that, The axial bearing (23) is located between the bottom of the central ring (105) and the top of the lifting plate (3).

6. The device for synchronously vibrating and supporting a rotor in an air cushion by means of the air cushion wall and the lifting plate according to claim 1, characterized in that, The lifting plate (3) is formed by the load-bearing plate (301), the lifting plate reinforcing rib (302), the upper plate (303), and the lifting plate center body (305). The lifting plate reinforcing rib (302) is fixedly connected between the load-bearing plate (301) and the upper plate (303), and the lifting plate center body (305) penetrates through the upper plate (303) and the load-bearing plate (301).

7. The device for synchronously vibrating and supporting a rotor in an air cushion by means of the air cushion wall and the lifting plate according to claim 1, characterized in that, The lifting plate (3) is formed by a disc (306) and a lifting plate center body (305), with the lifting plate center body (305) fixed in the middle of the solid disc (306).

8. A device for synchronously vibrating and supporting a rotor in an air cushion with the air cushion wall and the lifting plate as described in claim 6 or 7, characterized in that, The top and bottom of the air cushion wall (1) are connected to the central ring (105) by support spokes (103). Radial bearings (6) are provided between the central ring (105) at the top of the lifting plate (3) and the upper part of the central body (305) of the lifting plate, and between the central ring (105) at the bottom of the lifting plate (3) and the lower part of the central body (305) of the lifting plate (3).

9. A device for synchronously vibrating and supporting a rotor in an air cushion with the air cushion wall and the lifting plate according to any one of claims 1-7, characterized in that, A spring (25) is provided between the air cushion wall (1) and the sealing base (21).

10. A device for synchronously vibrating and supporting a rotor in an air cushion with the air cushion wall and the lifting plate according to any one of claims 1-7, characterized in that, A support platform (26) is provided between the lower part of the air cushion wall (1) and the sealed base (21).

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