An air cushion rotor support device with movable sealing disc auxiliary support

Abstract

This utility model discloses an air cushion supporting rotor device with a movable sealing disc as an auxiliary support. Since the upper part of the sealing disc is connected to the rotor or thrust head through an axial bearing, and the sealing disc is connected to the air cushion wall through a movable sealing device or the air cushion wall is connected to the base or upper frame through a movable sealing device, a second gas rotation sealing device is provided between the middle part of the sealing disc and the rotor shaft or the lifting disc. In this way, the pressure acting on the sealing disc can also be used to support the rotor, so that the lifting force generated by the air cushion is fully used to lift the rotor, thereby improving the efficiency of air cushion use and saving energy.

Description

Technical Field

[0001] This utility model belongs to the field of air cushion supported rotor devices, and particularly relates to an air cushion supported rotor device with movable sealing disc auxiliary support. Background Technology

[0002] In the existing patent number 202410323113.9, an air cushion flywheel energy storage device and other air cushion support rotor devices with a sealing disc or a barrel-shaped air cushion wall structure where the sealing disc is combined with the air cushion wall on the upper part of the lifting plate, the sealing disc or barrel-shaped air cushion wall cannot be connected to the rotating rotor or thrust head above because it does not rotate. Therefore, it has the following shortcomings.

[0003] Firstly, in a gas rotary sealing device, the gas pressure gradually decreases. Therefore, whenever a transverse surface appears in the middle of the longitudinal sealing device, pressure will act on both the upper and lower horizontal surfaces. Thus, as long as there is a longitudinal sealing device between the center of the sealing disc and the shaft, there will be pressure between the sealing disc and the support plate. The downward pressure acting on the support plate offsets part of the pressure in the lower air cushion chamber. The pressure acting on the sealing disc will generate upward pressure, but since the upper part of the sealing disc is not in contact with the rotor and is fixed to the ground, part of the thrust generated by this pressure can only act on the ground and cannot be used to support the rotor, resulting in waste. The larger the diameter of the sealing disc, the greater the pressure between the sealing disc and the support plate, the greater the energy waste, and the greater the losses.

[0004] Secondly, the rotating gas sealing device on the upper part of the lifting plate is very expensive. If the rotor is lighter and the air pressure inside the air cushion is not high, its use can be eliminated or reduced, which will reduce the cost of the entire air cushion device.

[0005] Finally, the sealing effect of the gas rotary seal device is related to the pressure difference. The smaller the pressure difference, the better the sealing effect. The gas rotary seal device on the side of the riser plate is the most important gas rotary seal device and has the longest circumference. Therefore, by adjusting the configuration of the sealing devices in each part, the pressure difference between the upper and lower parts of the riser plate can be reduced, and the sealing effect of the gas rotary seal device on the side of the riser plate, the main sealing part, will be better. However, if the gas pressure at the top of the riser plate is higher, the energy wasted will be greater. Utility Model Content

[0006] (1) Technical problem to be solved: To provide an air cushion support rotor device with movable sealing disc auxiliary support,

[0007] (2) The technical solution adopted by this utility model is as follows: an air cushion support rotor device with movable sealing disc auxiliary support, including an air cushion chamber formed by an air cushion wall, a cushion lifting plate and a base, the cushion lifting plate is connected to the rotor through a rotor shaft, a sealing disc is provided on the top of the air cushion wall, a first gas rotation sealing device is provided between the outer side of the cushion lifting plate and the air cushion wall, the upper part of the sealing disc is connected to the rotor through an axial bearing, the sealing disc is connected to the air cushion wall through a movable sealing device or the air cushion wall is connected to the base through a movable sealing device, and a second gas rotation sealing device is provided between the middle part of the sealing disc and the rotor shaft or the cushion lifting plate.

[0008] A further technical solution involves providing a radial bearing between the sealing disc and the rotor shaft or the lifting disc.

[0009] A further technical solution involves providing a second axial bearing between the sealing disc and the lifting disc.

[0010] A further technical solution is that the sealing disc is fixedly connected to the air cushion wall or is an integral structure, and a synchronization frame is provided at the lower part of the air cushion wall. The synchronization frame is connected to the lifting disc or rotor shaft through a second radial bearing.

[0011] A further technical solution is that the sealing disc is fixedly connected to the air cushion wall or is an integral structure, and a spring is also provided between the lower part of the air cushion wall and the base.

[0012] A further technical solution is that a thrust head is fixedly installed on the rotor shaft, the upper part of the sealing disc is connected to the thrust head through a first axial bearing, a second gas rotation sealing device is provided between the middle part of the sealing disc and the thrust head, a radial bearing is provided between the sealing disc and the thrust head, and a second axial bearing is provided between the sealing disc and the thrust head.

[0013] A further technical solution is that the sealing disc is formed by a central body and a circular disc.

[0014] A further technical solution is that the lifting plate is formed by a central body and a circular disc.

[0015] A further technical solution is that the lifting plate is formed by the lifting plate center body, the lifting plate disc and the upper plate, and a sealing gasket is provided between the lifting plate disc and the upper plate.

[0016] A further technical solution is that the air cushion wall includes an inner side wall and an outer side wall, a first gas rotation sealing device is provided between the outer side wall and the inner side wall of the cushion lifting plate, the sealing plate is connected to the outer side wall through a movable sealing device, and a second movable sealing device is provided between the inner side wall and the outer side wall.

[0017] (3) Due to the adoption of the above technical solution, the beneficial effects of this utility model are: since the upper part of the sealing disc is connected to the rotor through an axial bearing or a thrust head, the sealing disc is connected to the air cushion wall through a movable sealing device or the air cushion wall is connected to the base or thrust head through a movable sealing device, and a second gas rotation sealing device is provided between the middle part of the sealing disc and the rotor shaft or the lifting disc or the thrust head, the pressure acting on the sealing disc can also be used to support the rotor, which has the following advantages.

[0018] First, when the sealing disc is connected to the lower movable part, the pressure acting on the sealing disc is also used to lift the rotor through the axial bearing. Therefore, the pressure of the air cushion can be used entirely to lift the rotor, which improves the efficiency of the air cushion and saves energy.

[0019] Secondly, when the rotor is relatively light and the air pressure inside the air cushion is not high, the use of the rotating gas sealing device on the upper part of the cushion lifting plate can be omitted or reduced, which can reduce the cost of the entire air cushion device.

[0020] Finally, since the pressure acting on the sealing disc is also used to lift the rotor, adjusting the configuration of the sealing devices in each part to increase the pressure at the top of the lifting disc can reduce the pressure difference between the top and bottom of the lifting disc, thus increasing the sealing effect. Furthermore, because the sealing disc also uses pressure to lift the rotor, a higher pressure at the top of the lifting disc will not waste the energy of the air cushion. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram of Example 2;

[0023] Figure 3 This is a schematic diagram of the structure of Example 3. Detailed Implementation

[0024] 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.

[0025] like Figures 1-3 As shown.

[0026] Example 1: An air cushion supported rotor device with movable sealing disc auxiliary support includes an air cushion chamber 4 formed by an air cushion wall 1, a lifting disc 2, and a base 3. The lifting disc 2 is connected to a rotor 6 via a rotor shaft 5. A sealing disc 7 is disposed on the top of the air cushion wall 1. A first gas rotation sealing device 8 is disposed between the outer side of the lifting disc 2 and the air cushion wall 1. The upper part of the sealing disc 7 is connected to the rotor 6 via a thrust tapered roller bearing 9 acting as an axial bearing. The sealing disc 7 is connected to the air cushion wall 1 via a movable sealing device 10, which is a flexible sealing cloth. A second gas rotation sealing device 11 is disposed between the middle part of the sealing disc 7 and the rotor shaft 5 or the lifting disc 2. A radial bearing is disposed between the sealing disc 7 and the rotor shaft 5 or the lifting disc 2.

[0027] The basic structure and unnumbered components of the air cushion supporting rotor device of this utility model can be found in invention patents CN120007788B (a device for liquid-assisted sealing air cushion supporting rotor) and CN117927612B (an air cushion flywheel energy storage device). The working principle is as follows: the air cushion chamber 4 is connected to an air compressor, which supplies air to the interior of the air cushion chamber 4. Since there is a longitudinal second gas rotary sealing device 11 following the first longitudinal gas rotary sealing device 8, there is pressurized gas in the transverse lifting plate 2 and sealing plate 7 between the first gas rotary sealing device 8 and the second gas rotary sealing device 11. The lifting force generated by this pressurized gas acting on the sealing plate 7 can also be used to support the rotor 6. The sealing plate 7 is connected to the rotor shaft 5 through a self-aligning roller bearing 13 acting as a radial bearing. Because the self-aligning roller bearing 13 can withstand a certain axial load, it also supports the sealing plate 7 when the sealing plate 7 is light and the air cushion chamber 4 is not inflated. A thrust tapered roller bearing 9, which serves as an axial bearing, is also provided between the upper part of the sealing disc 7 and the shoulder of the rotor shaft 5. In this way, the lifting force generated by the sealing disc 7 can also be used to support the rotor 6. A second gas rotary sealing device 11 is provided between the middle part of the sealing disc 7 and the rotor shaft 5 or the lifting disc 2. The second gas rotary sealing device 11 can be a carbon ring seal, a mechanical seal, etc. If it is necessary to adjust the air pressure above and below the lifting disc, it can also be a combined seal, such as any combination of a labyrinth or honeycomb seal at the lower part and a carbon ring seal or a mechanical seal at the upper part.

[0028] In this embodiment, the thrust tapered roller bearing 9 can be directly disposed between the bottom of the rotor 6 and the top of the sealing disk 7. In addition, a step is provided at the connection between the rotor shaft 5 and the sealing disk 7, and the thrust tapered roller bearing 9 can be disposed between the top of the sealing disk 7 and the stepped surface.

[0029] In this embodiment, the sealing disc 7 is connected to the air cushion wall 1 through the movable sealing device 10. The purpose is to make a soft connection between the sealing disc 7 and the air cushion wall 1 so that the lifting force generated by the sealing disc 7 can be applied to the rotor shaft 5 or the rotor 6.

[0030] In this embodiment, a second gas rotation sealing device 11 is provided between the middle of the sealing disk 7 and the rotor shaft 5 or the lifting disk 2. In addition to increasing the sealing effect, it is also a necessary device to ensure that there is air pressure between the sealing disk 7 and the lifting disk 2. Since the rotor shaft 5, rotor 6 and lifting disk 2 rotate synchronously, the second gas rotation sealing device 11 can be provided either between the middle of the sealing disk 7 and the rotor shaft 5 or between the middle of the sealing disk 7 and the lifting disk 2.

[0031] In this embodiment, a self-aligning roller bearing 13, which serves as a radial bearing, is provided between the sealing disc 7 and the rotor shaft 5 or the lifting disc 2. Since the rotor shaft 5 and the lifting disc 2 rotate synchronously, while the sealing disc 7 is connected to the air cushion wall 1 and does not rotate, the sealing disc 7 is rotatably connected to the rotor shaft 5 or the sealing disc 7 is rotatably connected to the lifting disc 2. In practical applications, deep groove ball bearings, self-aligning rollers, etc., can also be used as radial bearings.

[0032] Example 2, based on Example 1, adopts the structure of the vertical generator or hydro generator in Example 1 of the invention patent CN120007788B: a device for supporting rotor with liquid-assisted sealing air cushion. The lower part of the upper frame 17 is the rotor 6, and the stator is around the rotor 6. The well-known structure of the lower part of the vertical generator or hydro generator is not shown in the figure.

[0033] The upper part of the sealing disc 7 is connected to the thrust head 12 via a thrust tapered roller bearing 9, which serves as an axial bearing. The thrust head 12 is connected to the rotor shaft 5. The second gas rotary sealing device 11 is disposed between the sealing disc 7 and the rotor shaft 5. The middle part of the sealing disc 7 is connected to the thrust head 12 via a thrust self-aligning roller bearing 16. Since the thrust self-aligning roller bearing 16 can withstand radial and axial loads, it serves as both a radial bearing between the sealing disc 7 and the thrust head 12 and a second axial bearing between the lower part of the sealing disc 7 and the thrust head 12. When the air cushion chamber 4 is not inflated, it also supports the sealing disc 7.

[0034] In this embodiment, just as the lifting plate 2 can be composed of a central body and a disc, the sealing plate 7 is also composed of a sealing plate central body 71 and a sealing plate disc 72. The sealing plate disc 7 is made of steel plate stamped into an arc shape, which has good pressure bearing capacity.

[0035] In this embodiment, a two-layer split air cushion wall 1 is adopted, consisting of an inner wall 21 and an outer wall 20. A first gas rotation sealing device 8 is provided between the outer side of the lifting plate 2 and the inner wall 21. The sealing plate 7 is connected to the outer wall 20 through a movable sealing device 10. A second movable sealing device 22 is provided between the inner wall 21 and the outer wall 20. Here, the movable sealing device 10 is an elastic O-ring seal. Synchronizing frames 14 are provided at both the upper and lower parts of the inner wall 21. The synchronous frames 14 are connected to the lifting plate 2 or the rotor shaft 5 through self-aligning roller bearings 13 (second radial bearings). A spring 15 (used to support the air cushion wall) is provided between the lower part of the inner wall 21 and the upper frame.

[0036] A third gas rotary seal device 19 is installed between the upper frame 17 and the rotor shaft 5.

[0037] Example 3 differs from Example 2 in that the lower rotor 6 has a flywheel structure. The air cushion wall 1 is connected to the sealing base 23 via a movable sealing device 10, which is an elastic O-ring seal. In this method, the sealing disc 7 is fixedly connected to the air cushion wall 1 or is an integral structure (an integral structure, such as an inverted barrel-shaped structure, with the sealing disc 7 at the bottom and the air cushion wall 1 on the wall). The movable sealing device 10 is provided between the integral structure of the air cushion wall 1 and the sealing disc 7 and the sealing base 23. This movable connection allows the lifting force generated by the sealing disc 7 to act on the rotor 6 through the thrust head 12 and the rotor shaft 5. Only the lower part of the sealing disc 7 is provided with a synchronous frame 14, which is connected to the lifting disc 2 or the rotor shaft 5 via a self-aligning roller bearing 13 (a second radial bearing). A spring 15 is also provided between the lower part of the air cushion wall 1 and the base 3. The sealing disc 7 is mounted on the thrust head 12 using a thrust self-aligning roller bearing 16.

[0038] In this embodiment, the rotor shaft 5 is provided with two thrust heads 12. The lower thrust head 12 contacts the center body of the lifting plate 2, and the upper small thrust head contacts the sealing plate 7 through a thrust tapered roller bearing 9, which acts as an axial bearing. In this way, both the lifting plate 2 and the sealing plate 7 can provide support for the rotor 6. In addition, the small thrust head also contacts the motor frame through a thrust tapered roller bearing 9, providing axial positioning when the air cushion thrust is greater than the weight of the rotor 6. A thrust sliding bearing for redundancy is provided between the lower part of the lifting plate 2 and the lower frame 17.

[0039] In this embodiment, the spring 15 bears the weight of the air cushion wall 1, which saves more energy of the air cushion. Of course, the elastic force of the spring 15 can also be greater than that of the sealing disc 7, pressing the sealing disc 7 onto the thrust tapered roller bearing 9. In this way, even if the air cushion chamber 4 is not filled with air, the sealing disc 7 will not fall down, and the thrust self-aligning roller bearing 16 is not needed. Only a radial bearing needs to be installed between the sealing disc 7 and the rotor shaft 5.

[0040] In practical applications, magnetic fluid sealing and other corresponding treatments can also be used. In this embodiment, the lifting plate 2 consists of a central body, a disc, and an upper plate. The disc is arc-shaped for better stress distribution. The upper plate and the air cushion wall 1 can be made of the same material so that they can expand and contract synchronously when the temperature changes. The disc and the upper plate of the lifting plate 2 have sealing gaskets.

[0041] In this invention, the sealing disc can adopt various complex structures similar to the lifting disc in the patent for the air cushion supporting rotor device.

[0042] In this invention, various components may be added between the sealing disc and the rotor, and between the sealing disc and the thrust head, but the most fundamental component is contained within the protection range of the axial bearing between the sealing disc and the rotor, and between the sealing disc and the thrust head.

[0043] For the sake of simplicity, this utility model does not include a gas rotation sealing device between the sealing disc and the lifting disc. In actual use, a gas rotation sealing device can be installed as needed.

[0044] In actual manufacturing, multiple functions can be implemented by one component, and a functional component can be broken down into multiple components.

[0045] In actual manufacturing, minor modifications may be made to the basic shape or small parts may be added, but the basic structure and function are not substantially different from the present invention, and should fall within the protection scope of the present invention.

[0046] This is a utility model. Various variations can be made between the sealing disc and the lower part of the rotor, the upper part of the lifting disc, the thrust head, and the rotor shaft, and various components can be added. However, as long as they provide axial support, radial positioning, and sealing, they are all within the protection scope of this utility model. For example, a stepped bushing for support can be added to the rotor shaft. However, as long as these components have a side parallel to the shaft, radial bearings and a second gas rotary sealing device can be installed.

[0047] The above are merely preferred embodiments of this utility model.

Claims

1. A rotor device with an air cushion support for a movable sealing disc, comprising an air cushion chamber (4) formed by an air cushion wall (1), a lifting disc (2), and a base (3), wherein the lifting disc (2) is connected to a rotor (6) via a rotor shaft (5), a sealing disc (7) is provided on the top of the air cushion wall (1), and a first gas rotation sealing device (8) is provided between the outer side of the lifting disc (2) and the air cushion wall (1), characterized in that, The upper part of the sealing disc (7) is connected to the rotor (6) via an axial bearing. The sealing disc (7) is connected to the air cushion wall (1) via a movable sealing device (10) or the air cushion wall (1) is connected to the base (3) via a movable sealing device (10). A second gas rotation sealing device (11) is provided between the middle part of the sealing disc (7) and the rotor shaft (5) or the lifting disc (2).

2. The air cushion support rotor device with movable sealing disc auxiliary support according to claim 1, characterized in that, A radial bearing is provided between the sealing disc (7) and the rotor shaft (5) or the lifting disc (2).

3. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 1, wherein, A second axial bearing is provided between the sealing disc (7) and the lifting disc (2).

4. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 1, wherein, The sealing disc (7) is fixedly connected to the air cushion wall (1) or is an integral structure. A timing frame (14) is provided at the lower part of the air cushion wall (1). The timing frame (14) is connected to the lifting disc (2) or the rotor shaft (5) through the second radial bearing.

5. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 1, wherein, The sealing disc (7) is fixedly connected to the air cushion wall (1) or is an integral structure. A spring (15) is also provided between the lower part of the air cushion wall (1) and the base (3).

6. A gas bearing support rotor apparatus with active seal disk assisted support as defined in claim 1, wherein, A thrust head (12) is fixedly installed on the rotor shaft (5). The upper part of the sealing disc (7) is connected to the thrust head (12) through an axial bearing. A second gas rotation sealing device (11) is provided between the middle part of the sealing disc (7) and the rotor shaft (5) or the thrust head (12).

7. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 6, wherein, A radial bearing is provided between the sealing disc (7) and the rotor shaft (5) or the thrust head (12).

8. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 6, wherein, A second axial bearing is provided between the sealing disc (7) and the rotor shaft (5) or the thrust head (12).

9. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 6, wherein, The sealing disc (7) is fixedly connected to the air cushion wall (1) or is an integral structure. A timing frame (14) is provided at the lower part of the air cushion wall (1). The timing frame (14) is connected to the lifting disc (2) or the rotor shaft (5) through the second radial bearing.

10. A gas bearing support spindle apparatus with active seal disk assisted support according to claim 6, wherein, The air cushion wall (1) includes an inner wall (21) and an outer wall (20). A first gas rotation sealing device (8) is provided between the outer side of the cushioning plate (2) and the inner wall (21). The sealing plate (7) is connected to the outer wall (20) through a movable sealing device (10). A second movable sealing device (22) is provided between the inner wall (21) and the outer wall (20).

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