Combined type inerter damper capable of enhancing energy consumption

Abstract

The combined type inerter damper comprises a cross-shaped upper shell, a first working cavity is formed in the upper shell, and threaded lead screws are installed in a penetrating mode through through holes in the top face and the bottom face of the upper shell; a flywheel meshed with the threaded lead screw is arranged in the first working cavity, multiple sets of small flywheels are meshed with the periphery of the flywheel, and the small flywheels are connected with first pistons through push rods; a lower shell is arranged at the bottom of the upper shell, a second working cavity is formed in the lower shell, the inner wall of the second working cavity and a second piston connected with the bottom of the threaded lead screw form a second piston cylinder, through the synergistic effect of the threaded lead screw, the flywheel set and piston adjustment, secondary conversion of kinetic energy, rotation inertia and friction energy consumption is achieved, and the higher energy density is achieved; the energy dissipation efficiency is remarkably improved, the vibration energy can be more effectively absorbed and dissipated, and the vibration amplitude of the system is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of shock-absorbing structures, relates to a damper, and in particular to a composite inertia-capacitance damper with enhanced energy dissipation. Background Art

[0002] Traditional structural vibration control devices primarily include mass-tuned dampers, viscous dampers, and metal yield dampers. These devices achieve vibration reduction by dissipating energy or altering the dynamic characteristics of the structure. However, in practical applications, traditional dampers often suffer from bulkiness, limited frequency adaptability, and insufficient energy dissipation efficiency. Their performance is particularly limited when responding to broadband random excitations such as earthquakes and strong winds, making them unable to meet the high-performance vibration isolation requirements of modern high-rise buildings, long-span bridges, and precision equipment.

[0003] The development of mechanical network theory provided the theoretical foundation for the development of inertia-capacitance dampers. This theory abstracts a mechanical system into a combination of three basic components: a spring, a damper, and an inertia chamber. The inertia chamber, through the coupling of its internal inertial mass with the transmission mechanism, can introduce an equivalent mass term into the dynamic equations. This feature overcomes the limitations of traditional dampers, which rely solely on stiffness or damping adjustment, making it possible to alter the natural frequency of a structure by adjusting the inertia-capacitance ratio.

[0004] In engineering practice, structural vibration control devices must also take into account reliability, economy, and ease of maintenance. Traditional inertial capacity dampers often require regular lubrication and maintenance due to their complex internal mechanical structure, and are prone to performance degradation in harsh environments. At the same time, existing designs lack research on the dynamic matching relationship between the inertial mass block and the transmission mechanism, resulting in the device potentially causing additional resonance risks under non-ideal working conditions. These problems have prompted researchers to explore new ways to implement inertial capacity, such as using magnetorheological materials to achieve variable inertia effects, or combining intelligent control algorithms to build active adjustment systems, but related technologies still face bottlenecks such as high energy consumption and control lag. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a composite inertia damper with enhanced energy dissipation, which significantly improves the energy dissipation efficiency and vibration control efficiency through the synergistic effect of the threaded screw, flywheel assembly and piston adjustment.

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

[0007] A composite inertia damper with enhanced energy dissipation comprises a cross-shaped upper shell, the four ends of the upper shell being closed, a cross-shaped first working chamber being formed inside the upper shell, the top and bottom surfaces of the upper shell being provided with through holes, and threaded screws being installed through the through holes in the top and bottom surfaces of the upper shell;

[0008] A piston cylinder is provided near each of the four ends of the first working chamber, and a transverse groove is provided in the middle of the end surface of the piston cylinder near the center of the first working chamber;

[0009] The bottom of the upper shell is vertically fixedly connected to a cylindrical lower shell, the bottom end of the lower shell is closed, and a second working chamber is formed inside;

[0010] The top of the threaded screw is provided with a connecting ear, and the bottom is provided with a second piston, and the second piston is located in the second working chamber and is in sealing and sliding contact with the inner wall of the second working chamber;

[0011] The portion of the threaded screw located in the first working chamber is provided with a flywheel, a mounting hole is vertically provided at the center of the flywheel, and an inner wall of the mounting hole is provided with an internal thread engaged with the threaded screw;

[0012] The flywheel is provided with a mounting groove at the bottom center, a thrust bearing is provided in the mounting groove, a mounting concave ring is provided on the top outer edge of the flywheel, and an inner tooth surface is provided on the inner wall of the mounting concave ring;

[0013] A fixed support is provided at the positions corresponding to the four ends of the outer side of the flywheel and the upper shell, and a small flywheel is provided on each of the fixed supports, and the tooth surface of the outer wall of the small flywheel meshes with the inner tooth surface of the mounting concave ring;

[0014] A fixing seat is provided near the outer edge of the top of the small flywheel, a connecting rod is hinged on the fixing seat, a push rod is hinged on the tail end of the connecting rod, the tail end of the push rod extends through a transverse groove to the piston cylinder where a first piston is provided, and the first piston is in sealing sliding contact with the inner wall of the piston cylinder.

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

[0016] Preferably, a dustproof sealing ring is provided on the through hole at the top center of the upper shell.

[0017] Preferably, the connecting rod and the push rod are hinged in a limited position.

[0018] Preferably, air holes are provided at the bottom of the second working chamber.

[0019] Preferably, ventilation holes are correspondingly provided at the four ends of the upper shell and the outer side wall of the piston cylinder.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] The present invention realizes the secondary conversion of kinetic energy → rotational inertia → friction energy consumption through the synergistic effect of the threaded screw, the flywheel group and the piston adjustment, has a higher energy density, significantly improves the energy dissipation efficiency, can more effectively absorb and dissipate vibration energy, and reduce the vibration amplitude of the system; on the one hand, the threaded screw converts axial vibration into flywheel rotation, and realizes the inertia effect through the multi-stage amplification of the small flywheel group, instantly absorbing the impact energy. At the same time, the small flywheel in the first working chamber drives the piston movement when rotating through the connection with the piston rod, and synergistically realizes energy absorption and regulation; on the other hand, the axial movement of the threaded screw realizes energy absorption and regulation through the movement of the piston in the second working chamber, realizing efficient energy absorption and vibration control;

[0022] Furthermore, the present invention provides air vents on the piston cylinder of the first working chamber and air holes at the bottom of the second working chamber, and controls the gas flow rate by controlling the aperture size of the air holes and the air holes, thereby better absorbing and regulating energy; on the other hand, by controlling the aperture size of the air holes and the air holes to adjust the gas flow rate, efficient energy absorption and vibration control can be achieved according to different vibration conditions, and the working state of the damper can be flexibly adjusted according to actual needs, so that the system always maintains stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the housing structure of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3 A top view of the present invention;

[0026] The meanings of the numbers in the figure are: 1-upper shell, 2-lower shell, 3-transverse groove, 4-first working chamber, 5-second working chamber, 6-threaded screw, 7-connecting ear, 8-air hole, 9-second piston, 10-flywheel, 11-small flywheel, 12-fixed seat, 13-first piston, 14-piston cylinder, 15-vent, 16-thrust bearing, 17-mounting groove, 18-fixed support, 19-dustproof sealing ring, 20-connecting rod, 21-push rod. DETAILED DESCRIPTION

[0027] The specific contents of the present invention are further explained in detail below with reference to the embodiments.

[0028] like Figures 1 to 3 As shown, this embodiment provides a composite inertia damper with enhanced energy dissipation, comprising a cross-shaped upper shell 1, the four ends of the upper shell 1 being closed, and a cross-shaped first working chamber 4 being formed inside. The top and bottom surfaces of the upper shell 1 are both provided with through holes, and a threaded screw 6 is installed through the through holes in the top and bottom surfaces of the upper shell 1.

[0029] A piston cylinder 14 is provided near each of the four ends of the first working chamber 4. A transverse groove 3 is provided in the middle of the end surface of the piston cylinder 14 near the center of the first working chamber 4.

[0030] The bottom of the upper shell 1 is vertically fixedly connected to a cylindrical lower shell 2. The bottom end of the lower shell 2 is closed, and a second working chamber 5 is formed inside.

[0031] The top of the threaded screw 6 is provided with a connecting ear 7, and the bottom is provided with a second piston 9. The second piston 9 is located in the second working chamber 5 and is in sealing and sliding contact with the inner wall of the second working chamber 5.

[0032] The portion of the threaded screw 6 located in the first working chamber 4 is fitted with a flywheel 10. A mounting hole is vertically provided in the center of the flywheel 10. An inner wall of the mounting hole is provided with an internal thread that meshes with the threaded screw 6.

[0033] A mounting groove 17 is provided at the bottom center of the flywheel 10, and a thrust bearing 16 is provided in the mounting groove 17. A mounting recessed ring is provided on the top outer edge of the flywheel 10, and an inner tooth surface is provided on the inner wall of the mounting recessed ring. The thrust bearing 16 is used to limit the bottom of the flywheel 10, making the mechanical components of the system more stable.

[0034] A fixed support 18 is provided at the position corresponding to the four ends of the outer side of the flywheel 10 and the upper shell 1, and a small flywheel 11 is provided on the fixed support 18. The tooth surface of the outer wall of the small flywheel 11 is engaged with the inner tooth surface of the mounting concave ring; the fixed support 18 is used to support the small flywheel 11 to prevent the small flywheel 11 from deflecting with the movement of the first piston 13.

[0035] A fixing seat 12 is provided at the top of the small flywheel 11 near the outer edge, and a connecting rod 20 is hinged on the fixing seat 12. A push rod 21 is hinged at the tail end of the connecting rod 20. The tail end of the push rod 21 extends through the transverse groove 3 to the piston cylinder 14 where a first piston 13 is provided. The first piston 13 is in sealing sliding contact with the inner wall of the piston cylinder 14.

[0036] A dustproof seal ring 19 is provided on the through hole at the top center of the upper shell 1. The dustproof seal ring 189 serves to seal the first working chamber 4 to prevent debris and dust from entering.

[0037] The connecting rod 20 and the push rod 21 are hinged in a limited position.

[0038] The bottom of the second working chamber 5 is provided with an air hole 8. Through the movement of the second piston 9, air is sucked and exhausted through the air hole 8 at the bottom of the second working chamber 5, which is used to buffer the axial movement of the threaded screw 6.

[0039] Vents 15 are provided at the four ends of the upper housing 1 and the outer wall of the piston cylinder 14. When the first piston 13 moves, it exhausts and inhales air through the vents 15, converting mechanical motion into heat or other forms of energy, and dissipating energy effectively in the system.

[0040] The working principle of the composite inertia damper with enhanced energy dissipation of the present invention is as follows:

[0041] When the threaded screw 6 performs axial reciprocating motion, the flywheel 10 in the first working chamber 4 rotates accordingly, and then the inner tooth surface of the concave ring of the flywheel 10 and the tooth surface of the outer wall of the small flywheel 11 drive the small flywheel 11 to rotate. When the flywheel 11 rotates, the connecting rod 20 and the push rod 21 hinged on the fixed seat 12 drive the first piston 13 to reciprocate. The first piston 13 pushes the air to inhale and exhaust through the vent 15. The flywheel 10, the four groups of small flywheels 11 and the four groups of first pistons 13 move in coordination, thereby improving energy consumption efficiency.

[0042] The second piston 9 in the second working chamber 5 performs axial reciprocating motion along with the threaded screw 6. When the second piston 9 moves, it pushes the air in the second working chamber 5 in and out through the air hole 8 at the bottom of the cylindrical lower shell 2. By controlling the aperture of the air hole 8, the movement speed of the second piston 9 is limited, thereby limiting the movement speed of the threaded screw 6, reducing the impact of mechanical vibration and impact, and improving the stability of the system.

[0043] The second piston 9, the flywheel 10, the small flywheel 11 and the first piston 13 play an important role in energy absorption and regulation through coordinated movement, achieving the dynamic balance of the system and precise regulation of energy;

[0044] The motion principle of the flywheel 10, the small flywheel 11 and the first piston 13 is as follows:

[0045] Assuming the thread transmission ratio is β, the relationship between the angular velocity of the flywheel 10 and the angular velocity of the threaded screw 6 is:

[0046] ω 10 =βω6

[0047] Among them, β is the thread transmission ratio, which can be determined by the pitch of the thread and the geometric design of the thread.

[0048] Since the flywheel 10 and the small flywheel 11 are meshed through gears, their angular velocity is inversely proportional to the number of teeth on the gears. Assuming the number of teeth on the flywheel 10 is Z10 and the number of teeth on the small flywheel 11 is Z11, the transmission ratio is:

[0049]

[0050] The relationship between the angular velocities of the flywheel 10 and the small flywheel 11 is:

[0051] ω 10 =i·ω3

[0052] Here, ω10 is the angular velocity of the flywheel 10 , and ω13 is the angular velocity of the small flywheel 11 .

[0053] Since the flywheel 10 and the small flywheel 11 are rigidly connected, their angular accelerations are the same:

[0054] α 10 =α 13 =α

[0055] Here, α10 is the angular acceleration of the flywheel 10, α11 is the angular acceleration of the small flywheel 11, and α is their common angular acceleration.

[0056] The torque relationship between the flywheel 10 and the small flywheel 11 can be expressed as:

[0057] τ 10 =I 10 α

[0058] τ 11 =I 11 α

[0059] Among them, τ10 is the torque acting on the flywheel 10, I10 is the moment of inertia of the flywheel 10, τ11 is the torque acting on the small flywheel 11, and I11 is the moment of inertia of the small flywheel 11.

[0060] The movement speed of the first piston 13 is proportional to the edge linear speed of the small flywheel 11, so

[0061] v 塞 =r 11 ·ω 11

[0062] The acceleration a of the first piston 13 is proportional to the angular acceleration of the small flywheel 11:

[0063] a 塞 =r 11 α

[0064] Wherein, r11 is the radius of the small flywheel 11.

[0065] The damping torques τd10 and τd11 between the flywheel 10 and the small flywheel 11 can be expressed as:

[0066] τ d10 =f g10 ·ω 10

[0067] τ d11 =f g11 ·ω 11

[0068] Wherein, fg10 and fg11 are the gear meshing damping coefficients of flywheel 10 and small flywheel 11 respectively;

[0069] The piston damping force Fd can be expressed as:

[0070] F d =f·v 塞

[0071] Where f is the damping coefficient and v is the velocity of the piston.

[0072] In the description of the present invention, it should be noted that the terms "top", "bottom", "up", "down", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0073] The above embodiments are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A composite inertia damper with enhanced energy dissipation, characterized in that: The invention comprises a cross-shaped upper shell (1), the four ends of the upper shell (1) are closed, and a cross-shaped first working chamber (4) is formed inside. The top and bottom surfaces of the upper shell (1) are both provided with through holes, and a threaded screw (6) is installed through the through holes of the top and bottom surfaces of the upper shell (1); A piston cylinder (14) is provided near each of the four ends of the first working chamber (4), and a transverse groove (3) is provided in the middle of the end surface of one end of the piston cylinder (14) near the center of the first working chamber (4); The bottom of the upper shell (1) is vertically fixedly connected to a cylindrical lower shell (2), the bottom end of the lower shell (2) is closed, and a second working chamber (5) is formed inside; The top of the threaded screw (6) is provided with a connecting ear (7), and the bottom is provided with a second piston (9). The second piston (9) is located in the second working chamber (5) and is in sealing and sliding contact with the inner wall of the second working chamber (5); The portion of the threaded screw (6) located in the first working chamber (4) is fitted with a flywheel (10), a mounting through hole is vertically provided at the center of the flywheel (10), and an internal thread meshing with the threaded screw (6) is provided on the inner wall of the mounting through hole; The flywheel (10) is provided with a mounting groove (17) at the bottom center thereof, a thrust bearing (16) is provided in the mounting groove (17), a mounting concave ring is provided at the top outer edge of the flywheel (10), and an inner tooth surface is provided on the inner wall of the mounting concave ring; A fixed support (18) is provided at positions corresponding to the four ends of the outer side of the flywheel (10) and the upper shell (1), and a small flywheel (11) is provided on each of the fixed supports (18), and the tooth surface of the outer wall of the small flywheel (11) meshes with the inner tooth surface of the mounting concave ring; A fixing seat (12) is provided at the top of the small flywheel (11) near the outer edge, a connecting rod (20) is hinged on the fixing seat (12), a push rod (21) is hinged at the tail end of the connecting rod (20), the tail end of the push rod (21) extends through the transverse groove (3) to the piston cylinder (14) where a first piston (13) is provided, and the first piston (13) is in sealing sliding contact with the inner wall of the piston cylinder (14).

2. The composite inertia damper with enhanced energy dissipation according to claim 1, characterized in that: A dustproof sealing ring (19) is provided on the through hole at the top center of the upper shell (1).

3. The composite inertia damper with enhanced energy dissipation according to claim 1, characterized in that: The connecting rod (20) and the push rod (21) are hinged with each other in a limited position.

4. The composite inertia damper with enhanced energy dissipation according to claim 1, characterized in that: The bottom of the second working chamber (5) is provided with an air hole (8).

5. The composite inertia damper with enhanced energy dissipation according to claim 1, characterized in that: The four ends of the upper shell (1) and the outer side wall of the piston cylinder (14) are correspondingly provided with ventilation holes (15).

Images