Ball screw type inerter damper capable of optimizing energy consumption

Abstract

The ball screw type inerter damper comprises a cylindrical shell with the two ends closed, and an inner cavity of the shell is divided into a first working cavity and a second working cavity by a partition plate in the center of the interior of the shell; the threaded lead screw penetrates through the second working cavity and extends into the first working cavity to be connected with a piston plate, a telescopic sealing barrel arranged on the periphery of the threaded lead screw in a sleeving mode is arranged between the piston plate and the partition plate, and the space between the sealing barrel and the inner wall of the first working cavity is filled with damping materials; a rotating cylinder with two closed ends is arranged in the second working cavity; an inner cylinder penetrating through the rotating cylinder is arranged in the center of the rotating cylinder in the axial direction, the two ends of the inner cylinder are open, and the threaded lead screw penetrates through the inner cylinder; a nut is fixedly connected to the lower end of the rotating cylinder and engaged with the threaded lead screw. A cavity is formed between the rotating cylinder and the inner cylinder, a flywheel is coaxially and slidably arranged in the middle of the cavity and the rotating cylinder, efficient energy absorption and vibration control are achieved through cooperation of throttling damping and inerter energy absorption, operation is stable, and the vibration damper is suitable for various vibration reduction scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of shock absorbing structures, relates to a damper, and in particular to a ball screw type inertia damper for optimizing energy consumption. Background Art

[0002] Modern engineering structures (such as buildings, bridges, vehicles, etc.) often produce more complex vibration phenomena when facing external forces (such as earthquakes, wind loads, traffic vibrations, etc.). Continuous vibration not only affects the safety and comfort of the structure, but may also reduce the service life of the equipment. Therefore, how to efficiently and reliably control and dissipate these vibration energies has become an important issue in engineering design. Although traditional damping technologies (such as viscous damping, friction damping, etc.) can effectively reduce vibrations, they have problems such as insufficient energy absorption and poor adaptability.

[0003] An inertia damper is a device that uses the "inertia effect" to absorb vibration energy, often combining the combined effects of mass elements, stiffness elements and damping elements. Compared with traditional dampers, inertia dampers have stronger energy absorption capacity and higher efficiency. The core of inertia technology is to enhance energy dissipation by introducing "inertia" elements, thereby providing efficient vibration reduction effects under a wider range of working conditions.

[0004] Inertial elements mainly achieve vibration reduction through inertia adjustment and energy transfer. At present, ball screw and rack and pinion inertial vibration reduction systems are more commonly used. Their working principle is to convert the input linear motion into rotational motion to generate the inertial coefficient. However, these methods have several technical problems: the traditional ball screw structure has limited load-bearing capacity due to its reliance on the ball conversion mechanism, and the connection between the nut and the screw will affect the mechanical stiffness and reduce the transmission efficiency of the system; the gear meshing problem of the traditional rack and pinion structure may lead to a decrease in transmission accuracy or even failure; these mechanical structures cannot operate stably under high acceleration, which limits the output of their inertial effect. Therefore, the traditional inertial vibration reduction system faces challenges in load-bearing capacity, speed response and transmission efficiency, which limits its application in the field of high-performance vibration reduction. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a ball screw inertia damper with optimized energy consumption, which can achieve efficient energy absorption and vibration control through the synergy of throttling damping and inertia energy absorption, and has stable operation and is suitable for a variety of vibration reduction scenarios.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A ball screw type inertia damper for optimizing energy consumption comprises a cylindrical shell with closed ends, wherein a partition parallel to the end surface is arranged in the center of the shell; the partition divides the inner cavity of the shell into a first working cavity near the bottom and a second working cavity near the top;

[0008] The upper end surface of the shell and the center of the partition are both provided with mounting through holes;

[0009] A threaded screw is installed through the installation through hole; the head end of the threaded screw and the center of the bottom of the shell are both provided with connecting ears;

[0010] The tail end of the threaded screw is fixedly connected to a piston plate located in the first working chamber, and a preset distance is provided between the piston plate and the inner wall of the first working chamber;

[0011] In the first working chamber, a retractable sealing cylinder is provided between the piston plate and the partition plate and is sleeved on the outer periphery of the threaded screw. A damping material is filled between the sealing cylinder and the inner wall of the first working chamber.

[0012] The second working chamber is provided with a rotating cylinder with closed ends; the center of the rotating cylinder is provided with an inner cylinder penetrating the rotating cylinder along the axial direction, the inner cylinder is open at both ends, and the threaded screw passes through the inner cylinder;

[0013] The lower end of the rotating cylinder is fixedly connected with a nut, and the nut is meshed with the threaded screw;

[0014] A cavity is formed between the rotating cylinder and the inner cylinder, and a flywheel is provided in the middle of the cavity in a coaxial sliding relationship with the rotating cylinder.

[0015] The present invention also has the following technical features:

[0016] Preferably, a spring is disposed inside the sealing cylinder, with two ends respectively connected to the piston plate and the partition plate.

[0017] Preferably, thrust bearings are provided between the rotating cylinder and the top wall of the shell, and between the nut and the upper end surface of the partition.

[0018] Furthermore, thrust bearing mounting grooves are provided on the top wall of the shell and the upper end surface of the partition.

[0019] Preferably, the nut and the rotating cylinder are connected via a limiting connecting piece.

[0020] Preferably, the outer wall of the flywheel is provided with an external thread, and the inner wall of the flywheel is provided with an internal thread;

[0021] The inner wall of the rotating cylinder is provided with a thread engaged with the external thread;

[0022] The outer wall of the inner cylinder is provided with a thread meshing with the internal thread.

[0023] Preferably, a dustproof sealing ring is provided between the mounting through hole on the upper end surface of the housing and the threaded screw.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] The axial movement of the threaded screw of the present invention can drive the cylinder to rotate, and then drive the flywheel to rotate to absorb inertia energy, thereby optimizing the energy dissipation capacity of the inertia damper; the piston in the first working chamber of the present invention provides damping in the form of throttling, thereby optimizing the energy dissipation capacity of the inertia damper, and energy absorption and regulation are achieved through the throttling damping and inertia energy absorption, thereby achieving efficient energy absorption and vibration control;

[0026] The portion of the threaded screw of the present invention that penetrates into the interior of the shell is supported and guided by a sealing cylinder and a piston; the sealing cylinder effectively prevents the damping material from entering, thereby ensuring the sealing of the damping working chamber, while the movement of the piston in the damping chamber provides precise guiding effect; this structural design not only significantly improves the rigidity of the system and enhances the stability of the mechanical components, but also ensures the efficient operation of the inertia capacity shock absorber under dynamic load, thereby improving the overall performance and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a cross-sectional view of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the rotating drum and the flywheel of the present invention;

[0030] Figure 4 It is a schematic diagram of the housing structure of the present invention;

[0031] The meanings of the numbers in the figure are: 1-housing, 2-partition, 3-first working chamber, 4-second working chamber, 5-threaded screw, 6-connecting ear, 7-piston plate, 8-sealing cylinder, 9-rotating cylinder, 10-inner cylinder, 11-nut, 12-cavity, 13-spring, 14-thrust bearing, 15-thrust bearing mounting groove, 16-limiting connector, 17-flywheel, 18-dustproof sealing ring. DETAILED DESCRIPTION

[0032] The specific contents of the present invention are further explained in detail below in conjunction with embodiments.

[0033] like Figures 1 to 4As shown, this embodiment provides a ball screw type inertia damper for optimizing energy consumption, comprising a cylindrical shell 1 with closed ends, and a partition 2 parallel to the end surface is arranged in the center of the shell 1; the partition 2 divides the inner cavity of the shell 1 into a first working cavity 3 near the bottom and a second working cavity 4 near the top;

[0034] The upper end surface of the shell 1 and the center of the partition 2 are both provided with mounting through holes;

[0035] A threaded screw 5 is installed through the installation through hole; a connecting ear 6 is provided at the head end of the threaded screw 5 and the bottom center of the housing 1; the connecting ear 6 is made of stainless steel;

[0036] The tail end of the threaded screw 5 is fixedly connected to a piston plate 7 located in the first working chamber 3 , and there is a preset distance between the piston plate 7 and the inner wall of the housing 1 .

[0037] In the first working chamber 3, a retractable sealing cylinder 8 is arranged between the piston plate 7 and the partition plate 2 and is sleeved on the outer periphery of the threaded screw 5. The two ends of the sealing cylinder 8 are respectively fixed on the partition plate 2 and the piston plate 7; damping material is filled between the sealing cylinder 8 and the inner wall of the first working chamber 3; the damping material includes silicone oil, high molecular polymer solution, etc.; the preset distance between the piston plate 7 and the inner wall of the shell 1 is used for the circulation of the damping material.

[0038] When the threaded screw 5 moves axially, the piston plate 7 moves axially accordingly. The axial movement of the piston plate 7 directly acts on the damping material, and the damping material is squeezed to varying degrees under the push of the piston plate 7, so that the damping material quickly passes through the preset spacing to perform damping energy consumption, resulting in the conversion of mechanical motion into heat energy or other forms of energy, and effective energy dissipation in the system.

[0039] The second working chamber 4 is provided with a rotating cylinder 9 with both ends closed; an inner cylinder 10 penetrating the rotating cylinder 9 is axially provided at the center of the rotating cylinder 9, and both ends of the inner cylinder 10 are open, and the threaded screw 5 penetrates the inner cylinder 10;

[0040] The lower end of the rotating cylinder 9 is fixedly connected with a nut 11, and the nut 11 is engaged with the threaded screw 5;

[0041] A cavity 12 is formed between the rotating cylinder 9 and the inner cylinder 10, and a flywheel 17 is provided in the middle of the cavity 12 coaxially and slidably with the rotating cylinder 9. The flywheel 17 plays an important role in energy absorption and regulation through its rotational inertia, and acts as a damping element to stabilize the rotation of the system. The inertial characteristics of the flywheel 17 can effectively adjust the rotation rate of the system to avoid excessive acceleration or deceleration, thereby achieving dynamic balance and precise regulation of energy. In addition, the design of the threaded connection makes it possible to accurately adjust the tightness of the connection and the transmission efficiency according to the load requirements, thereby accurately controlling the response characteristics of the flywheel 17. The combination of rotational inertia and mechanical adjustment ensures the optimal performance of the flywheel 17 under different working conditions and significantly improves the stability of the system.

[0042] A spring 13 is provided inside the sealing cylinder 8, and its two ends are connected to the piston plate 7 and the partition plate 2 respectively. The spring 13 is used to elastically buffer the axial movement of the threaded screw 5 to improve the vibration reduction effect. When the threaded screw 5 moves axially until the vibration reduction spring 13 is compressed or stretched to the limit, the inertia vibration reduction system can play the role of a supporting component.

[0043] A thrust bearing 14 is provided between the rotating cylinder 9 and the top wall of the housing 1, and between the nut 11 and the upper end surface of the partition 2. A thrust bearing mounting groove 15 is provided on the top wall of the housing 1 and the upper end surface of the partition 2. The thrust bearings 14 are movably sleeved on the threaded screw 5, and the end of the thrust bearing 14 away from the rotating cylinder 9 is interference fit with the thrust bearing mounting groove 15; the thrust bearing 14 is used to limit the axial position of the rotating cylinder 8, and the mounting groove 15 is used to limit the thrust bearing 14, so that the mechanical components of the system are more stable.

[0044] The nut 11 and the rotating cylinder 9 are connected by a limiting connector 16, so that the nut 11 and the rotating cylinder 9 are relatively fixed. Due to the existence of the limiting connector, the transmission method between the nut 11 and the rotating cylinder 9 is efficient and stable, which can ensure that power is smoothly transmitted from the nut 11 to the flywheel 17.

[0045] The outer wall of the flywheel 17 is provided with an external thread, and the inner wall of the flywheel 17 is provided with an internal thread;

[0046] The inner wall of the rotating cylinder 9 is provided with threads that mesh with the external threads;

[0047] The outer wall of the inner cylinder 10 is provided with a thread meshing with the internal thread. The threads of the flywheel 17, the inner cylinder 10 and the rotating cylinder 9 mesh, and the torque transmitted by the threads of the rotating cylinder 9 directly acts on the flywheel 17, prompting it to rotate to absorb energy through inertia, while preventing it from moving rapidly in the axial direction, thus ensuring the stability of the structure operation.

[0048] A dustproof seal ring 18 is provided on the mounting through hole on the upper end surface of the housing 1. The dustproof seal ring 18 is slidably sleeved on the threaded screw 5. The dustproof seal ring 18 serves to seal the second working chamber 4 to prevent debris and dust from entering.

[0049] The working principle of the ball screw type inertia damper for optimizing energy consumption of the present invention is as follows:

[0050] When the threaded screw 5 performs axial reciprocating motion, the piston plate 7 in the first working chamber 3 in the system makes corresponding motion in the axial direction. The axial motion of the piston plate 7 directly acts on the damping material, thereby applying different degrees of extrusion force to the damping material. The extrusion action causes the damping material to deform within a preset spacing, and dissipates energy through plastic deformation and friction of the material. Specifically, the damping material converts mechanical motion into heat energy or other forms of energy, thereby effectively realizing the energy dissipation of the system, reducing the impact of mechanical vibration and shock, and improving the stability of the system.

[0051] In this process, the spring 13 plays a further role, providing elastic buffering to reduce the impact caused by the axial movement of the threaded screw 5. This elastic buffering mechanism enhances the overall vibration reduction effect and avoids structural damage or efficiency loss caused by excessive vibration or impact.

[0052] The axial movement of the threaded screw 5 drives the nut 11 to rotate, and the nut 11 and the lower thrust bearing 14 move in coordination, driving the upper rotating cylinder 9 to rotate. Due to the existence of the limit connector 16, the transmission method between the nut 11 and the rotating cylinder 9 is efficient and stable, which can ensure that the power is smoothly transmitted from the nut 11 to the flywheel 17. The rotational movement of the rotating cylinder 9 directly acts on the flywheel 17 through the torque transmitted by the thread, causing it to rotate.

[0053] The flywheel 17 plays an important role in energy absorption and regulation through its rotational inertia, and acts as a damping element to stabilize the rotation of the system. The inertial characteristics of the flywheel 17 can effectively adjust the rotation rate of the system to avoid excessive acceleration or deceleration, thereby achieving dynamic balance and precise regulation of energy. In addition, the design of the threaded connection allows the tightness of the connection and the transmission efficiency to be precisely adjusted according to the load requirements, thereby accurately controlling the response characteristics of the flywheel 17. The combination of rotational inertia and mechanical adjustment ensures the optimal performance of the flywheel 17 under different working conditions and significantly improves the stability of the system.

[0054] The energy absorption principle of the flywheel 17 is as follows:

[0055] The mass m of the cylinder and flywheel and the vertical distance r from the cylinder and flywheel to the screw shaft have the following relationship with the moment of inertia I:

[0056] Assume that parameter P is the lead of the screw, in m; the mass of the cylinder m1 and the mass of the flywheel m2, in kg; the vertical distance from the cylinder and the flywheel to the screw shaft is r, in m, then the moment of inertia of the cylinder and the flywheel I (in kg·m 2 ) can be expressed as:

[0057]

[0058] The inertia coefficient X of the flywheel working chamber can be expressed as:

[0059]

[0060] The comprehensive kinematic relationship between the cylinder and the flywheel is as follows:

[0061] 1. Thread transmission relationship

[0062] Angular velocity transmission: Assume that the angular velocity of the rotating cylinder 9 is ω2 (unit: rad / s), the angular velocity of the flywheel 17 is ω6 (unit: rad / s), and they are transmitted through a thread. Assume that the thread transmission ratio is β, then the relationship between the angular velocity of the flywheel 6 and the angular velocity of the rotating cylinder 9 is:

[0063] ω 6＝ βω2

[0064] Wherein, β is the thread transmission ratio, which can be determined by the pitch of the thread and the geometric design of the thread. In this design, the thread transmission ratio is 1, and the angular velocity of the flywheel 17 is the same as that of the rotating cylinder 9.

[0065] 2. Inertia of the flywheel

[0066] The inertia of the flywheel 17 affects its angular acceleration. The moment of inertia of the flywheel is I6 (unit: kg·m 2 ), so the angular acceleration of the flywheel is α6 (unit: rad / s 2 ) and the torque τ6 (unit: N·m) it receives is:

[0067] τ6=I6α6

[0068] Torque transmission: The torque is transmitted between the rotating cylinder 9 and the flywheel 17 through the threaded connection. Assuming that the torque provided by the nut 11 is τ2 (unit: N·m), the torque τ6 transmitted to the flywheel 17 can be expressed as:

[0069] τ6=τ2

[0070] Therefore, the angular acceleration of the flywheel 17 is:

[0071]

[0072] 3. Damping effect of the system

[0073] The flywheel 17 plays an important role in energy absorption and regulation through its rotational inertia, and acts as a damping element to stabilize the rotation of the system. Assuming the damping coefficient of the system is b (unit: N·m·s / rad), the damping torque τ of the flywheel 17 is damping (Unit: N·m) can be expressed as:

[0074] τ damping =-bω6

[0075] 4. Comprehensive equations of motion

[0076] Combining the above aspects, the comprehensive motion relationship between the flywheel 17 and the rotating drum 9 can be expressed as:

[0077] I6α6+bω6=τ2

[0078] in, is the angular acceleration of the flywheel 17, ω6 is the angular velocity of the flywheel 17, τ2 is the torque transmitted to the flywheel 17 by the rotating cylinder 9, b is the damping coefficient, and I6 is the moment of inertia of the flywheel 17.

[0079] The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the technical solutions in the present invention, ordinary technicians with relevant technical fields can derive other various implementation methods through reasonable deduction and experiment without creative work, and these implementation methods also belong to the protection scope of the present invention. In the embodiments of the present invention, the examples involved are illustrated by the accompanying drawings. In the accompanying drawings, if the labels remain consistent from beginning to end, it means that the corresponding elements or components have the same or similar functions in different illustrations. Through the unification of the drawings and labels, the specific implementation and operation principle of the technical solution of the present invention can be more intuitively understood. In addition, the embodiments used in the drawings are exemplary, and the purpose is to help explain the present invention, rather than to limit the implementation of the present invention.

[0080] In the description of the present invention, it should be particularly understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is used based on the relative orientation or positional relationship shown in the accompanying drawings. The use of these terms is mainly to facilitate the description and simplified description of the present invention, and does not mean that the device or element referred to must have a specific orientation structure or operate in a specific direction. Therefore, these orientations or positional relationships should not be interpreted as any restrictions on the implementation of the present invention, nor should they be understood as requiring that the device or element must be configured or operated in a fixed orientation in actual application. In other words, the orientation or positional relationship involved in the terms is only used as a descriptive tool to help understand the structure and working principle of the technical solution, and in the actual implementation process, the relevant devices or elements can be freely adjusted as needed without being restricted by a specific orientation. The scope of protection of the present invention should be determined based on the technical features defined in the claims, rather than being limited to the specific orientation arrangements shown in the accompanying drawings.

[0081] In the present invention, unless otherwise expressly provided, terms such as "connected", "fixed", etc. should be understood broadly. These terms can cover a variety of connection methods, such as fixed connection, detachable connection or integrated connection; it can be a mechanical connection, an electrical connection, or an indirect connection through an intermediary; it can also refer to the internal connectivity or interaction relationship between two elements. Therefore, the terms "connected" and "fixed" are not limited to specific forms, and the specific meanings should be flexibly understood according to actual conditions. For those skilled in the art, they can reasonably judge the specific meanings of these terms in the present invention based on specific applications and technical requirements. This broad understanding helps to flexibly adapt to different implementation methods and technical solutions. In short, the use of terms should not be regarded as a limitation of the present invention, and the scope of protection should be defined according to the technical features in the claims.

Claims

1. A ball screw type inertia damper for optimizing energy consumption, characterized in that: It comprises a cylindrical shell (1) with closed ends, wherein a partition (2) parallel to the end surface is arranged in the center of the shell (1); the partition (2) divides the inner cavity of the shell (1) into a first working cavity (3) near the bottom and a second working cavity (4) near the top; The upper end surface of the shell (1) and the center of the partition (2) are both provided with mounting through holes; A threaded screw (5) is installed through the installation through hole; the head end of the threaded screw (5) and the bottom center of the housing (1) are both provided with connecting ears (6); The tail end of the threaded screw (5) is fixedly connected to a piston plate (7) located in the first working chamber (3), and a preset distance is provided between the piston plate (7) and the inner wall of the first working chamber (3); In the first working chamber (3), a retractable sealing cylinder (8) is arranged between the piston plate (7) and the partition plate (2) and is sleeved on the outer periphery of the threaded screw (5), and a damping material is filled between the sealing cylinder (8) and the inner wall of the first working chamber (3); The second working chamber (4) is provided with a rotating cylinder (9) with both ends closed; an inner cylinder (10) penetrating the rotating cylinder (9) is provided at the center of the rotating cylinder (9) along the axial direction, the inner cylinder (10) is open at both ends, and the threaded screw (5) penetrates the inner cylinder (10); The lower end of the rotating cylinder (9) is fixedly connected with a nut (11), and the nut (11) is meshed with the threaded screw (5); A cavity (12) is formed between the rotating cylinder (9) and the inner cylinder (10), and a flywheel (17) is provided in the middle of the cavity (12) so as to slide coaxially with the rotating cylinder (9).

2. The ball screw type inertia damper with optimized energy consumption according to claim 1, characterized in that: The sealing cylinder (8) is provided with a spring (13) at both ends of which are respectively connected to the piston plate (7) and the partition plate (2).

3. The ball screw type inertia damper with optimized energy consumption according to claim 1, characterized in that: Thrust bearings (14) are provided between the rotating cylinder (9) and the top wall of the shell (1), and between the nut (11) and the upper end surface of the partition plate (2).

4. The ball screw type inertia damper with optimized energy consumption as claimed in claim 3, characterized in that: The top wall of the housing (1) and the upper end surface of the partition (2) are both provided with thrust bearing installation grooves (15).

5. The ball screw type inertia damper with optimized energy consumption according to claim 1, characterized in that: The nut (11) is connected to the rotating cylinder (9) via a limiting connecting piece (16).

6. The ball screw type inertia damper with optimized energy consumption according to claim 1, characterized in that: The outer wall of the flywheel (17) is provided with an external thread, and the inner wall of the flywheel (17) is provided with an internal thread; The inner wall of the rotating cylinder (9) is provided with a thread that meshes with the external thread; The outer wall of the inner cylinder (10) is provided with a thread meshing with the internal thread.

7. The ball screw type inertia damper with optimized energy consumption according to claim 1, characterized in that: A dustproof sealing ring (18) is provided on the mounting through hole on the upper end surface of the housing (1).

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