Upper guide bearing supporting system of supergravity centrifugal machine

Abstract

An upper guide bearing supporting system of a super-gravity centrifugal machine comprises a centrifugal machine arranged in a civil engineering structure, a vacuum container is arranged above the centrifugal machine, an upper guide bearing supporting system is arranged above a rotating shaft of the centrifugal machine, the upper guide bearing supporting system comprises a center base arranged on the vacuum container, an upper guide bearing is arranged on the center base, and the upper guide bearing is arranged on the center base. The upper guide bearing is arranged on the rotating shaft in a sleeving mode, a supporting arm and an end supporting leg are arranged at the end of the center base, a side wall hole is formed in the side wall of the vacuum container, the end supporting leg penetrates through the side wall hole and is fixed through an embedded plate, and a first flexible vibration isolation connecting device is arranged between the end supporting leg and the side wall of the vacuum container. An opening is formed in the top of the vacuum container, the second flexible vibration isolation connecting device is connected below the opening, the opening cylinder is connected below the second flexible vibration isolation connecting device and fixed to the center base, and the upper guide bearing corresponds to the opening of the opening cylinder.

Description

Technical Field

[0001] This invention relates to an upper guide bearing support system for a centrifuge, belonging to the technical field of centrifuges. Background Technology

[0002] A centrifuge is an important scientific experimental device, typically composed of a motor, shaft, rotating arm, experimental chamber, bearing system, and auxiliary systems. During operation, the motor drives the rotating arm to rotate, generating centrifugal force and centrifugal acceleration *a* within the experimental chamber at the end of the rotating arm. When *a* exceeds the gravitational acceleration *g* (9.81 m / s²), a hypergravity environment is created. Hypergravity allows for scaling, time-lapse, and high-temperature / high-pressure experiments, enabling experiments difficult to perform in normal gravity environments, such as dam failure, pollutant migration, and disaster evolution, thus supporting scientific and technological research and development. Currently, the gravitational acceleration at the end of the centrifuge arm often exceeds 150g. A higher rotational speed generates a greater hypergravity acceleration within the experimental chamber, better meeting experimental requirements. However, a higher rotational speed also leads to greater unbalanced forces during operation, increasing the likelihood of vibration in the centrifuge's rotation system. Therefore, higher requirements are placed on the centrifuge's rotational stability control system. The most crucial subsystem in this system is the centrifuge's bearing support system, which ensures the stability of the high-speed rotating shaft and arms. Simultaneously, as the centrifuge's rotational speed increases, the friction between the arms and the air generates a significant amount of heat. This heat accumulation can affect the arm's structure and the experimental environment. To reduce heat generation, some centrifuges now incorporate a vacuum system. This system places the centrifuge arms within a vacuum container, maintaining the air pressure within the container at a certain vacuum level, thereby reducing heat generation from friction between the arms and the air.

[0003] Current centrifuge bearing support systems typically consist of only a lower guide bearing and a thrust bearing, which ensures operational stability for centrifuges with relatively low centrifugal acceleration. However, for centrifuges with higher centrifugal acceleration, the continuous increase in centrifugal rotation speed and centrifugal force presents significant challenges in controlling and ensuring rotational stability, thus hindering the development of centrifugation simulation technology to some extent. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an upper guide bearing support system for a centrifuge.

[0005] The objective of this invention is achieved through the following technical solution: An upper guide bearing support system for a centrifuge with high gravity includes a centrifuge installed in a civil structure, a vacuum container installed above the centrifuge, and an upper guide bearing support system installed above the centrifuge's rotating shaft. The upper guide bearing support system includes a central base frame installed on the vacuum container, an upper guide bearing installed on the central base frame, and the upper guide bearing sleeved on the rotating shaft. Support arms and end legs are installed at the ends of the central base frame. Side wall holes are provided on the side walls of the vacuum container, and the end legs pass through the side wall holes and are fixed by embedded plates. A first flexible vibration isolation connection device is provided between the end legs and the side walls of the vacuum container. An opening is provided at the top of the vacuum container, and a second flexible vibration isolation connection device is connected below the opening. An open cylinder is connected below the second flexible vibration isolation connection device and is fixed on the central base frame. The upper guide bearing corresponds to the opening of the open cylinder.

[0006] Furthermore, the central base of the frame is provided with six or eight support arms, and each support arm is provided with an end support leg at its end.

[0007] Furthermore, the first flexible vibration isolation connection device comprises a first bellows and a first connecting flange.

[0008] Furthermore, the second flexible vibration isolation connection device comprises a second bellows and a second connecting flange.

[0009] Furthermore, a rotating sealing sleeve is provided under the upper guide bearing.

[0010] Furthermore, the embedded plate is embedded in the civil engineering structure.

[0011] Furthermore, a machine pit is provided in the civil engineering structure, and the vacuum container is placed in the machine pit.

[0012] The beneficial effects of this invention are: To address the stability issues of the rotating system in centrifuges operating at higher centrifugal accelerations, an upper guide bearing support system was installed above the centrifuge, building upon the existing lower guide bearing support assembly and thrust bearing support assembly in current centrifuges. This solves the operational stability problem of the centrifuge shaft system. Simultaneously, the corresponding structure resolves issues such as sealing and vibration isolation between the upper guide bearing support system and the centrifuge vacuum container, which is beneficial for increasing the rotational speed and centrifugal acceleration at the end of the rotor arm, thus laying the foundation for the continuous development of centrifugal scientific experimental technology. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the upper guide bearing support system of a centrifuge for supergravity according to the present invention; Figure 2 This is a top view of the upper guide bearing support system of a centrifuge for supergravity according to the present invention; Figure 3 yes Figure 1 A magnified view of part A; Figure 4 yes Figure 2 A magnified view of section B. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0015] like Figure 1 — Figure 4As shown, an upper guide bearing support system for a centrifuge for supergravity includes a centrifuge installed in a civil structure 1, a vacuum container 11 installed above the centrifuge, the centrifuge including a motor 2 and a rotating shaft 3, a rotating arm 4 installed on the rotating shaft, and an experimental chamber 5 installed at each end of the rotating arm, the rotating shaft 3 equipped with a lower guide bearing support assembly 6 and a thrust bearing support assembly 7, the upper guide bearing support system being installed above the rotating shaft 3, the upper guide bearing support system including a frame center base 9 installed on the vacuum container 11, an upper guide bearing 8 installed on the frame center base 9, and the upper guide bearing 8 being sleeved on the rotating shaft 3. The central base 9 of the frame is provided with a support arm 18 and an end support leg 10. A side wall hole 12 is provided on the side wall of the vacuum container 11. The end support leg 10 passes through the side wall hole 12 and is fixed by a pre-embedded plate 13. A first flexible vibration isolation connection device 15 is provided between the end support leg 10 and the side wall of the vacuum container 11. An opening 14 is provided at the top of the vacuum container 11. A second flexible vibration isolation connection device 17 is connected below the opening 14. An open cylinder 16 is connected below the second flexible vibration isolation connection device 17. The open cylinder 16 is fixed on the central base 9 of the frame, and the upper guide bearing 8 corresponds to the opening of the open cylinder 16. The vacuum container 11 described in this solution is formed by welding steel plates, and its internal air pressure is a vacuum, reducing the heat generated during centrifuge operation. However, since the vacuum container 11 is a thin-walled container, it cannot withstand large vibrations and radial forces during centrifuge operation. A central base 9 is installed on the upper part of the centrifuge, and an upper guide bearing 8 is installed on the central base 9. The upper guide bearing 8 is sleeved on the rotating shaft 3. The upper guide bearing 8 directly constrains the radial displacement and vibration generated when the rotating shaft 3 rotates. The vibration and radial force from the centrifuge are then transmitted to the embedded plate 13 and the civil structure 1 through the central base 9, the support arm 18, and the end support leg 10. Combined with the existing lower guide bearing support assembly and thrust bearing support assembly, the problem of the operating stability of the centrifuge shaft system with higher centrifugal acceleration is solved, which is conducive to improving the rotational speed and centrifugal acceleration at the end of the rotating arm of the centrifuge. The frame 9 support arm 18 is also welded from steel plates and is welded to the end support leg 10. The end support leg 10 is cylindrical, with one end connected to the frame center base 9 and the other end passing through the side wall hole 12 and directly fixed to the embedded plate 13. This allows the radial force generated when the centrifuge shaft rotates to be transmitted to the embedded plate 13 and the civil structure 1 through the upper guide bearing 8, the frame center base 9, the support arm 18, and the end support leg 10. This achieves the transmission of radial force and vibration during centrifuge operation. Since the civil structure 1 is generally a large volume of concrete, it can withstand the vibration from the centrifuge, ensuring the stability of the centrifuge shaft system. Furthermore, since the end support leg 10 passes through the side wall hole 12 and does not directly contact the vacuum container 11, the transmission of vibration to the container side wall is avoided.The first flexible vibration isolation connection device 15 connects and seals the end support leg 10 and the vacuum container 11, preventing vacuum leakage within the vacuum container 11 and isolating the vibration of the frame center base 9 from being transmitted to the vacuum container, which is beneficial to the strength design and safe operation of the vacuum container. The second flexible vibration isolation connection device 1517 connects and seals the open cylinder 16 and the vacuum container 11, preventing vacuum leakage within the vacuum container 11 and isolating the vibration of the frame center base 9 from being transmitted to the top of the vacuum container through the open cylinder 16, which is beneficial to the strength design and safe operation of the vacuum container. Simultaneously, the interior of the open cylinder 16 is connected to the external atmosphere, placing the upper guide bearing 8 in an atmospheric environment, avoiding the adverse effects of the vacuum within the vacuum container 11 on the operating performance of the upper guide bearing 8, and further improving the rotational stability of the shaft.

[0016] Furthermore, the central base 9 of the frame is provided with six or eight support arms 18, and each support arm 18 is provided with an end support leg 10. The central base of the frame adopts an appropriate number of support arms according to its size, which supports the upper guide bearing 8 and the rotating shaft 3.

[0017] Furthermore, the first flexible vibration isolation connection device 15 comprises a first bellows 20 and a first connecting flange 21. The bellows is an existing material with good buffering effect, and the flange is easy to connect.

[0018] Furthermore, the second flexible vibration isolation connection device 17 comprises a second bellows 22 and a second connecting flange 23. The second flexible vibration isolation connection device 17 has the same structure as the first flexible vibration isolation connection device 15. The bellows can provide a good buffering effect, and the flange is easy to connect.

[0019] Furthermore, a rotating sealing sleeve 25 is provided under the upper guide bearing 8 to prevent air leakage from the vacuum container of the centrifuge.

[0020] Furthermore, the pre-embedded plate 13 is pre-embedded in the civil structure 1 to facilitate the fixing of the end support legs.

[0021] Furthermore, a machine pit 24 is provided in the civil structure 1, and the vacuum container 11 is installed in the machine pit 24, ensuring stable installation.

[0022] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. All modifications and equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A supergravity centrifuge upper bearing support system, comprising a centrifuge arranged in a civil structure (1), a vacuum vessel (11) being arranged above the centrifuge, characterized in that: The upper guide bearing support system is arranged above the rotating shaft (3) of the centrifuge, and comprises a central base (9) arranged on the vacuum container (11), an upper guide bearing (8) arranged on the central base (9), and the upper guide bearing (8) being sleeved on the rotating shaft (3). The central base (9) is provided with a support arm (18) and an end leg (10) at the end. A side wall hole (12) is arranged on the side wall of the vacuum container (11), the end leg (10) passes through the side wall hole (12) and is fixed by a pre-embedded plate (13). A first flexible vibration isolation connecting device (15) is arranged between the end leg (10) and the side wall of the vacuum container (11). An opening (14) is arranged at the top of the vacuum container (11), a second flexible vibration isolation connecting device (17) is connected below the opening (14), an opening cylinder (16) is connected below the second flexible vibration isolation connecting device (17), and the opening cylinder (16) is fixed on the central base (9). The upper guide bearing (8) corresponds to the opening of the opening cylinder (16).

2. A top bearing support system for a high gravity centrifuge as claimed in claim 1, wherein Six or eight support arms (18) are arranged on the central base (9), and one end leg (10) is arranged at the end of each support arm (18).

3. A top bearing support system for a high gravity centrifuge as defined in claim 1 wherein The first flexible vibration isolation connecting device (15) comprises a first bellows (20) and a first connecting flange (21).

4. A top bearing support system for a high gravity centrifuge as defined in claim 1 wherein The second flexible vibration isolation connecting device (17) comprises a second bellows (22) and a second connecting flange (23).

5. A top bearing support system for a high gravity centrifuge as defined in claim 1 wherein A rotary sealing sleeve (25) is arranged below the upper guide bearing (8).

6. A top bearing support system for a high gravity centrifuge as defined in claim 1 wherein The pre-embedded plate (13) is pre-embedded in the civil structure (1).

7. A top bearing support system for a high gravity centrifuge as defined in claim 1 wherein The civil structure (1) is provided with a machine pit (24), and the vacuum container (11) is arranged in the machine pit (24).

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