A semi-active inertial container based on pressure control

Abstract

This invention discloses a semi-active inertial container based on pressure control, belonging to the field of seismic resistance and vibration isolation technology. It includes a main support structure composed of a top plate and a bottom plate, with support frames evenly distributed between the top and bottom plates. A drive assembly is installed at the center of the main support structure, and a pressure regulating assembly is connected to the bottom of the drive assembly. The drive assembly includes a ball screw, and the pressure regulating assembly includes a flywheel. The bottom of the ball screw is connected to the flywheel via a connecting flange. Liquid inside the flywheel is distributed in the inner and outer cavities of the flywheel. The inner cavity of the flywheel is installed in the central region of the flywheel and connected to a pressure intelligent regulator, enabling real-time adjustment of the inertial coefficient according to external conditions. This invention, employing a semi-active inertial container based on pressure control, not only achieves stepless adjustment of the inertial coefficient but also effectively avoids wear problems in mechanical devices, reducing the manufacturing and maintenance costs of the device.

Description

Technical Field

[0001] This invention relates to the field of seismic resistance and vibration reduction technology, and in particular to a semi-active inertial container based on pressure control. Background Technology

[0002] Vibration is an unavoidable problem in daily life and production practices, with far-reaching impacts. Severe vibration can affect the sensitivity and accuracy of precision machining equipment, and even lead to component or structural failure. Furthermore, vibration can reduce the comfort of the working environment and cause discomfort to personnel. To suppress undesirable vibrations, researchers both domestically and internationally have proposed various vibration control methods, mainly including passive control, semi-active control, active control, and hybrid control. Among these, passive control is widely used due to its simple structure and independence from external energy input. Common passive control devices include tuned mass dampers (TMDs) and viscous fluid dampers (VDs). These two types of devices have attracted much attention in the engineering field due to their excellent control effects, but both have certain problems that limit their widespread application. Specifically, the control effect of tuned mass dampers is highly dependent on the mass ratio between the added mass and the main structure, usually requiring a relatively large mass ratio to achieve excellent control; viscous fluid dampers suffer from problems such as oil leakage, and their long-term durability is a challenging issue.

[0003] In recent years, inertial containers, as a novel mechanical component, have been widely used to improve and enhance traditional vibration damping devices. The basic function of an inertial container is to convert the relative acceleration between two points into force, complementing common springs (energy storage elements) and dampers (energy dissipation elements). Its unique advantage lies in its ability to provide large inertial mass without significantly increasing the system's mass, and it is currently applied in fields such as automotive suspension, building vibration damping, and bridge seismic resistance.

[0004] However, most existing inertial navigation systems fall under the category of passive control and cannot adaptively adjust according to changes in the external environment and the dynamic characteristics of the structure itself, which poses a potential risk of performance degradation.

[0005] Meanwhile, existing semi-active inertial containers mostly use electromagnetic control, variable speed gearboxes, magnetic powder clutches, etc., which result in complex device structures, limited inertial mass adjustment range, and high manufacturing and maintenance costs. Summary of the Invention

[0006] The purpose of this invention is to provide a semi-active inertial container based on pressure control, which can not only achieve stepless adjustment of the inertial capacity coefficient, but also effectively avoid the wear problem of mechanical devices and reduce the manufacturing and maintenance costs of the device.

[0007] To achieve the above objectives, the present invention provides a semi-active inertial container based on pressure control, comprising a main support structure, the main support structure being composed of a top plate and a bottom plate, with support frames evenly distributed between the top plate and the bottom plate, and a drive assembly installed at the center of the main support structure, the bottom of which is connected to a pressure regulating assembly.

[0008] Preferably, the drive assembly includes a ball screw that vertically penetrates the top plate and the bottom plate and is connected to a ball nut.

[0009] Preferably, the top and bottom ends of the ball screw are fixed to the top and bottom plates by bearing seats.

[0010] Preferably, the outer side of the ball screw is fitted with a washer, and the two sides of the washer are sleeved on the support frame through flange bearings, and the flange bearings are installed on the support frame by bolts.

[0011] Preferably, the pressure regulating assembly includes a flywheel, the bottom of the ball screw is connected to the flywheel via a connecting flange, and a buffer block is provided between the connecting flange and the washer.

[0012] Preferably, the flywheel includes an inner cavity and an outer cavity, the inner cavity is installed in the central region of the flywheel, and the inner cavity is connected to a pressure intelligent regulator.

[0013] Preferably, the flywheel inner cavity is connected to the flywheel outer cavity via a double-bottomed pipe, and radial partitions are uniformly provided between the flywheel inner cavity and the flywheel outer cavity.

[0014] Preferably, the support frame is fixedly connected to the top plate and the bottom plate by bolts, and the bottom plate is provided with a fixing gasket on the inner side.

[0015] Therefore, the present invention employs a semi-active inertial container based on pressure control, which promotes the flow of liquid within the flywheel cavity by controlling the pressure inside the flywheel, adjusting the mass distribution of the liquid between the inner and outer cavities of the flywheel, and realizing dynamic adjustment of the moment of inertia, thereby achieving stepless adjustment of the inertial capacity coefficient; by using pressure adjustment (e.g., inflation and deflation), the internal pressure can be adjusted in real time during flywheel operation, which can effectively avoid mechanical damage caused by friction of mechanical devices or uneven load.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a semi-active inertial container embodiment based on pressure control according to the present invention;

[0018] Figure 2This is a front view of an embodiment of a semi-active inertial container based on pressure control according to the present invention;

[0019] Figure 3 This is a schematic diagram of the flywheel portion structure of an embodiment of a pressure-controlled semi-active inertial container according to the present invention;

[0020] Figure 4 This is a cross-sectional view of a flywheel half-section of an embodiment of a pressure-controlled semi-active inertial container according to the present invention;

[0021] Figure 5 This is a schematic diagram of the liquid flow inside and outside the flywheel in an embodiment of a pressure-controlled semi-active inertial container according to the present invention.

[0022] Figure Labels

[0023] 1. Ball screw; 2. Ball nut; 3. Top plate; 4. Bottom plate; 5. Support frame; 6. Flange bearing; 7. Radial partition; 8. Flywheel inner cavity; 9. Flywheel outer cavity; 10. Flywheel; 11. Intelligent pressure regulator; 12. Double-bottom pipe; 13. Fixing gasket; 14. Connecting flange; 15. Washer; 16. Bearing housing; 17. Buffer block. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0026] Example 1

[0027] like Figure 1 , Figure 2 As shown, the present invention provides a semi-active inertial container based on pressure control, including a main support structure, which is composed of a top plate 3 and a bottom plate 4. Support frames 5 are evenly distributed between the top plate 3 and the bottom plate 4. The support frames 5 are fixed by bolts to ensure a rigid connection between them and the top plate 3 and the bottom plate 4. A fixing gasket 13 is provided on the inner side of the bottom plate 4. The main support structure provides a foundation for the installation and fixing of internal components.

[0028] A drive assembly is installed at the center of the main support structure, and a pressure regulating assembly is connected to the bottom of the drive assembly. The drive assembly includes a ball screw 1, which vertically passes through the top plate 3 and the bottom plate 4, and is connected to a ball nut 2, thus forming the main transmission structure. The ball nut 2 engages with the ball screw 1, causing the ball screw 1 to drive the pressure regulating assembly to rotate, providing inertial power. The top and bottom ends of the ball screw 1 are fixed to the top plate 3 and the bottom plate 4 by bearing seats 16. The bearing seats 16 provide rotational support and reduce friction, while ensuring that the bearings are fixed in a preset position.

[0029] The outer side of the ball screw 1 is fitted with washers 15, and the two sides of the washers 15 are sleeved on the support frame 5 through flange bearings 6. The flange bearings 6 are bolted to the support frame 5. The flange bearings 6 ensure the rotational accuracy of the ball screw 1 and prevent radial deviation.

[0030] The pressure adjustment assembly includes a flywheel 10. The bottom of the ball screw 1 is connected to the flywheel 10 via a connecting flange 14. A buffer block 17 is provided between the connecting flange 14 and the washer 15 to reduce mechanical impact between the components.

[0031] The rotational motion of the ball screw 1 converts linear motion into rotational motion through its helical structure, driving the flywheel 10 to move. When the ball screw 1 rotates, the ball nut 2 moves along the axial direction of the ball screw 1, thereby driving the flywheel 10 connected to it to rotate and providing inertial force. The rotational angular velocity of the flywheel 10 depends on parameters such as the lead, rotational angular velocity, and diameter of the ball screw 1. By adjusting the rotational speed of the ball screw 1 and its design parameters, the rotational speed of the flywheel 10 can be controlled, thus affecting the inertial characteristics of the device.

[0032] like Figure 3 , Figure 4 As shown, the flywheel 10 includes an inner cavity 8 and an outer cavity 9. The inner cavity 8 is installed in the central region of the flywheel 10, and the top of the flywheel 10 is tightly connected to the bottom of the ball screw 1, enabling the flywheel 10 and the ball screw 1 to move synchronously. The inner cavity 8 is connected to a pressure intelligent regulator 11 to adjust the air pressure inside the flywheel 10 in real time. The pressure intelligent regulator 11 controls the pressure of the inner cavity 8 by inflating and deflating air, thereby affecting the flow of liquid.

[0033] When the intelligent pressure regulator 11 applies pressure, the air pressure inside the flywheel cavity 8 increases, causing liquid to flow into the flywheel outer cavity 9 through the double-bottom pipe 12. The liquid distribution within the flywheel outer cavity 9 changes, with the liquid concentrating at the outer edge of the flywheel outer cavity 9. As liquid enters the flywheel outer cavity 9, the inertial mass increases due to the distribution of liquid at a larger radius, increasing the inertia of the device. Conversely, when the intelligent pressure regulator 11 reduces the air pressure inside the flywheel cavity 8, the liquid flows back from the flywheel outer cavity 9 to the flywheel inner cavity 8, reducing the inertial mass. Figure 5As shown.

[0034] Radial baffles 7 are uniformly arranged between the inner cavity 8 and the outer cavity 9 of the flywheel. The purpose of the radial baffles 7 is to effectively control the distribution of liquid in the outer cavity 9 of the flywheel and the double-bottom pipe 12, ensuring uniform liquid flow in the flywheel system and preventing eddies or slippage caused by unstable liquid flow, which may lead to device instability. When liquid enters the outer cavity 9 of the flywheel, the radial baffles 7 ensure uniform liquid distribution in the outer cavity 9 of the flywheel by dividing the liquid flow path, further stabilizing the inertial response of the device and enhancing its operational reliability.

[0035] The flywheel inner cavity 8 is connected to the flywheel outer cavity 9 via a double-bottomed pipe 12, forming a connected fluid system. According to the principles of fluid mechanics, liquid flow depends on the pressure difference between the inner and outer cavities. When the air pressure changes, a pressure difference is created between the inner and outer cavities, causing liquid to flow between them until the pressures are balanced. At constant temperature, air pressure is inversely proportional to gas volume. When the gas in the flywheel inner cavity 8 is compressed, the inner pressure increases and the volume decreases; conversely, when the gas expands, the air pressure decreases and the volume increases, thus adjusting the moment of inertia of the flywheel 10.

[0036] As the liquid rotates around the lead screw shaft in the rotating flywheel 10, the intelligent pressure regulator 11 controls the redistribution of the liquid inside the flywheel 10. The centrifugal pressure of the rotating liquid is counteracted by pre-pressurizing the outer cavity 9 of the flywheel; the pre-pressurization pressure depends on factors such as the rotational angular velocity and the radial distance of the double-bottom channels. By adjusting these parameters, the distribution of liquid in the inner and outer cavities of the flywheel can be controlled, thereby adjusting the inertia of the device. The flow of liquid and the regulation of internal pressure are dynamic processes. When liquid flows from the inner cavity 8 of the flywheel to the outer cavity 9, the inertia of the device increases; conversely, when liquid flows back from the outer cavity to the inner cavity, the inertia decreases.

[0037] The radius of the flywheel inner cavity 8 and the density of the liquid determine the variable volume of the liquid, thus affecting the range of inertial volume variation. By designing the dimensions of the flywheel inner cavity 8, the maximum liquid volume can be controlled, directly affecting the variable range of the device's inertial volume. The higher the liquid level and the greater its mass, the greater the amplitude of the inertial volume variation. The diameters of the flywheel inner cavity 8 and the flywheel outer cavity 9 can be freely chosen within the space between them according to design requirements. The radius of the flywheel outer cavity 9 determines the volume of gas in contact with the fluid, which can be limited by adjusting the radius of the flywheel outer cavity 9. By designing the dimensional ratio of the inner and outer cavities, the liquid flow and the effect of inertial volume regulation can be optimized.

[0038] When the flywheel 10 reduces its rotational speed, the air pressure in the flywheel inner cavity 8 decreases accordingly. The pre-charged air pressure in the flywheel outer cavity 9 plays a major role, pushing the liquid back through the double-bottom pipe 12 to the flywheel inner cavity 8. This moves the liquid and its mass from the larger radius position of the flywheel outer cavity 9 to the smaller radius position of the flywheel inner cavity 8, reducing the inertia of the device. When the pressure intelligent regulator 11 pushes the liquid from the flywheel inner cavity 8 into the flywheel outer cavity 9, the pressure difference in the pipe drives the liquid flow. The pressure drop of the liquid flow is affected by factors such as pipe friction, liquid density, and flow velocity. These factors determine the flow of liquid between the inner and outer cavities of the flywheel, thus affecting the response speed of the inertia regulation.

[0039] The intelligent pressure regulator 11 adjusts the air pressure in the flywheel cavity 8 to dynamically change the air pressure gradient generated when the liquid flows between the inner and outer cavities. The pressure drop generated during liquid flow directly affects the fluid velocity and flow rate, leading to changes in the internal mass distribution and thus adjusting the inertial characteristics of the device. By controlling the air pressure in the flywheel cavity 8, rapid and flexible adjustment of inertia can be achieved.

[0040] The technical principle of this device is as follows: a ball screw 1 drives a flywheel 10 to rotate, providing inertial force. An intelligent pressure regulator 11 dynamically adjusts the air pressure inside the flywheel cavity 8, thereby controlling the mass distribution of the internal liquid and achieving stepless continuous adjustment of the inertial coefficient. Since the liquid is incompressible, its volume remains essentially constant during operation. By effectively controlling the air pressure inside the flywheel cavity 8, the mass distribution of the liquid is dynamically adjusted, thus achieving continuous adjustment of the inertial coefficient.

[0041] Example 2

[0042] In this invention, the drive component can also be a gear drive, belt drive, or direct drive motor. The most suitable drive method can be selected according to application requirements and cost considerations.

[0043] The main support structure in this invention can be made of high-strength, lightweight materials, such as carbon fiber composites or high-strength aluminum alloys; the liquid medium used in the device can be replaced according to specific needs, such as using liquids of different densities or viscosities to adjust the sensitivity and range of inertial changes.

[0044] In this invention, a self-regulating electric pump system can be added to the intelligent pressure regulator to achieve higher response speed and better energy-saving effects. By optimizing the pump control strategy and adjusting the pressure of the hydraulic system, more precise fluid flow control can be achieved, further improving the accuracy of inertial regulation. Users can select the most suitable hydraulic components according to specific engineering requirements and environmental conditions to optimize overall performance.

[0045] Therefore, the present invention employs a semi-active inertial container based on pressure control, which not only enables stepless adjustment of the inertial capacity coefficient, but also effectively avoids wear problems of mechanical devices and reduces the manufacturing and maintenance costs of the device.

[0046] It is worth noting that all the contents not described in detail in this invention are existing technologies and are well known to those skilled in the art.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A semi-active inertial container based on pressure control, characterized in that: It includes a main support structure, which is composed of a top plate and a bottom plate. Support frames are evenly distributed between the top plate and the bottom plate. A drive assembly is installed at the center of the main support structure, and a pressure adjustment assembly is connected to the bottom of the drive assembly. The drive assembly includes a ball screw that vertically penetrates the top plate and the bottom plate and is connected to a ball nut. The pressure adjustment assembly includes a flywheel, and the bottom of the ball screw is connected to the flywheel via a connecting flange. A buffer block is provided between the connecting flange and the washer. The flywheel includes an inner cavity and an outer cavity. The inner cavity is installed in the central region of the flywheel and is connected to a pressure intelligent regulator. The flywheel inner cavity is connected to the flywheel outer cavity through a double-bottomed pipe, and radial partitions are uniformly provided between the flywheel inner cavity and the flywheel outer cavity; The intelligent pressure regulator controls the pressure inside the flywheel cavity by inflating and deflating the flywheel, thereby affecting the flow of liquid. When the intelligent pressure regulator increases the pressure, the air pressure inside the flywheel cavity increases, causing the liquid to flow into the flywheel outer cavity through the double-bottom pipe. When the intelligent pressure regulator decreases the air pressure inside the flywheel cavity, the liquid flows back from the flywheel outer cavity to the flywheel inner cavity, achieving dynamic adjustment of the moment of inertia and thus stepless adjustment of the inertial capacity coefficient.

2. The semi-active inertial container based on pressure control according to claim 1, characterized in that: The top and bottom ends of the ball screw are fixed to the top and bottom plates by bearing seats.

3. A semi-active inertial container based on pressure control according to claim 2, characterized in that: The outer side of the ball screw is fitted with washers, and the two sides of the washers are sleeved on the support frame through flange bearings. The flange bearings are installed on the support frame by bolts.

4. A semi-active inertial container based on pressure control according to claim 1, characterized in that: The support frame is fixedly connected to the top plate and the bottom plate by bolts, and the inner side of the bottom plate is provided with fixing gaskets.

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