Particle impact composite damper

Abstract

The present application relates to a kind of particle impact composite damper, it is installed on building structure, for vibration damping, damper includes: damper cavity;The movable baffle in damper cavity, it separates into first chamber and second chamber with damper cavity;A plurality of particles are arranged in first chamber;A plurality of impact dampers are arranged in second chamber, move in the direction close to or away from baffle, including impact block, and impact shell is sleeved outside impact block and is used for colliding with impact block;Magnet is arranged in the end of impact block close to baffle;And electromagnet is arranged in the side of baffle towards second chamber, and it is attracted with magnet, when magnet pole is opposite with magnet pole when being electrified.Compared with prior art, the present application combines the advantages of traditional particle damper and impact damper, vibration damping efficiency is high, the characteristics of wide application range, can meet the practical application needs of mechanical engineering or civil engineering.

Description

Technical Field

[0001] The invention relates to the field of civil engineering structure vibration control, in particular to a particle impact composite damper. Background Art

[0002] Vibration control is a crucial technology widely used in various structural systems. Particle dampers and impact dampers are two common vibration reduction devices. Particle dampers dissipate vibration energy through collisions and friction between particles and between particles and cavity walls, and are characterized by a simple structure and easy installation. However, traditional particle dampers exhibit poor fluidity and low energy dissipation efficiency under low-frequency vibration conditions. In particular, at low frequencies, the mutual collisions between particles are weak, resulting in poor vibration reduction. Impact dampers dissipate vibration energy through collisions between impact blocks and the shell. They can effectively reduce vibration at high frequencies, but at low frequencies, due to the low collision frequency between impact blocks, the energy dissipation efficiency is insufficient. Therefore, existing single particle dampers or impact dampers often struggle to achieve ideal vibration reduction when dealing with vibrations in multiple frequency ranges.

[0003] Patent publication number CN111075046A discloses a variable volume particle damper that combines a particle damper, an impact damper, and a tuned damper. However, this device is implemented by providing at least one movable baffle within the damper cavity, which is connected to the inner wall of the damper cavity via one or more elastic connectors. The baffle divides the damper cavity into distinct chambers, within which particles or particle groups are placed. This device primarily enhances particle collisions through volume changes and is unable to automatically adjust its operating state based on changes in the frequency and amplitude of external vibrations. This limits the damper's applicability in complex dynamic environments and makes it difficult to meet the diverse demands for vibration reduction efficiency in practical applications. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, such as poor fluidity under low-frequency conditions and insufficient collision efficiency under high-frequency conditions, and to provide a particle impact composite damper. It combines the advantages of traditional particle dampers and impact dampers, and has the characteristics of high vibration reduction efficiency and a wide range of applications, and can meet the actual application needs of mechanical engineering or civil engineering.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A particle impact composite damper, comprising:

[0007] damper cavity;

[0008] a movable baffle located in the damper cavity, which separates the damper cavity into a first chamber and a second chamber;

[0009] disposing a plurality of particles within the first chamber;

[0010] a plurality of impact dampers disposed in the second chamber and movable in a direction approaching or away from the baffle, comprising an impact block fixed to the bottom surface of the damper chamber, and an impact shell sleeved outside the impact block and configured to collide with the impact block;

[0011] A magnet disposed on one end of the impact block close to the baffle;

[0012] and an electromagnet arranged on a side of the baffle facing the second chamber and attracted to the magnet, wherein the magnetic pole of the electromagnet is opposite to that of the magnet when energized.

[0013] Furthermore, the electromagnet has no magnetism when it is not energized, and has a magnetic pole opposite to that of the magnet when it is energized, thereby attracting each other.

[0014] Furthermore, the electromagnet is mainly composed of iron core material, winding material and shell material. When the electromagnet is energized, the iron core material is magnetized, enhancing the magnetism of the electromagnet; when the power is off, the iron core material is quickly demagnetized, causing the electromagnet to lose its magnetism.

[0015] Furthermore, the core material is silicon steel sheet or soft iron rod; the winding material is copper wire, aluminum wire or nickel wire; and the shell material is plastic or wood.

[0016] Furthermore, the bottom of the impact shell is open, and the size of the impact shell is larger than the size of the impact block.

[0017] Furthermore, the impact block is a rectangular parallelepiped, the impact shell is a rectangular parallelepiped without a bottom cover, and the volume of the impact shell is 2.475 to 5.85 times the volume of the impact block.

[0018] Furthermore, the length, width and height of the impact shell are 1.5 to 2.5 times, 1.1 to 1.3 times and 1.5 to 1.8 times the length, width and height of the impact block respectively.

[0019] Furthermore, the impact block is a cube structure.

[0020] Furthermore, cushion pads are provided on both sides of the impact block, which can alleviate the wear of the material surface caused by the collision between the impact block and the impact shell, thereby extending the life of the damper;

[0021] A plurality of pulleys are provided at the bottom of the impact shell.

[0022] Furthermore, the material of the buffer pad includes rubber, plastic or foam.

[0023] Furthermore, the bottom surface of the damper cavity is provided with a plurality of tracks for the baffle to move, which are perpendicular to the baffle.

[0024] Furthermore, the track is a straight track, and its length is equal to the sum of the lengths of the first chamber and the second chamber.

[0025] Furthermore, a toothed track is provided on the top surface of the damper cavity, and a gap is provided between the highest point of the baffle and the lowest point of the toothed track, so that the baffle and the toothed track are not in contact, thereby reducing the impact of unnecessary friction on the damper performance;

[0026] A connecting block is provided on the top side wall of the baffle, and a retractable baffle for popping up and supporting the toothed track is provided on the connecting block.

[0027] Furthermore, the length of the toothed track is equal to the sum of the lengths of the first chamber and the second chamber.

[0028] Furthermore, the damper also includes a vibration sensor for being installed on a building structure and for detecting the vibration effect thereof.

[0029] Furthermore, a displacement sensor is installed on the baffle and is used to detect the distance between the baffle and the side wall of the damper cavity.

[0030] Furthermore, the vibration sensor and the displacement sensor are electrically connected to a controller, and the controller is electrically connected to the retractable baffle and the electromagnet respectively;

[0031] When the building structure is stationary, the vibration sensor detects no vibration signal, the electromagnet is not energized, the retractable baffle pops up to support the toothed track, the baffle is fixed in position, and the displacement sensor does not work;

[0032] When the building structure is subjected to vibration, the vibration sensor detects a vibration signal, converts the vibration signal into an electrical signal and transmits it to the controller; when the detected vibration signal is lower than a set vibration signal, the controller controls the electromagnet to be de-energized, controls the retractable baffle to pop up and press against the toothed track, so that the baffle is fixed in position, and at this time the displacement sensor does not work; when the detected vibration signal is higher than or equal to the set vibration signal, and the vibration signal is increasing, the controller controls the electromagnet to be energized, so that the electromagnet and the magnet attract each other, controls the retractable baffle to retract and separate from the toothed track, so that the baffle can move, and at this time the displacement sensor does not work;

[0033] When the detected vibration signal reaches the highest value, the controller controls the displacement sensor to work, detects the distance between the baffle and the side wall of the damper cavity, and converts the displacement signal into an electrical signal and transmits it to the controller. When the baffle moves to the set position, the controller controls the electromagnet to cut off power, and at the same time controls the retractable baffle to pop up and support the toothed track, so that the baffle position is fixed.

[0034] Furthermore, the controller is PLC controlled.

[0035] Furthermore, the vibration signal of the building structure is in the form of a sine wave.

[0036] Furthermore, a buffer layer is provided on the inner wall of the damper cavity, which is obtained by coating the inner wall of the damper cavity with a buffer material, and is used to reduce the collision between the particles and the first cavity, thereby increasing the life of the damper.

[0037] Furthermore, the buffer material includes rubber, plastic or foam.

[0038] Furthermore, the particles are spherical with a diameter of 5 to 10 mm.

[0039] Furthermore, the particles, the damper cavity, the impact block, the impact shell, the track, and the toothed track are all made of steel.

[0040] Compared with the prior art, the present invention has the following advantages:

[0041] (1) The particle impact composite damper of the present invention combines the advantages of particle dampers and impact dampers, can work effectively under low-frequency and high-frequency vibration conditions, and can adjust the working mode through a linkage control structure, thereby solving the shortcomings of the particle dampers and impact dampers in the prior art in terms of working performance at different frequencies, and providing a more efficient and flexible solution for vibration control in mechanical engineering and civil engineering.

[0042] (2) The particle impact composite damper provided by the present invention is provided with a vibration sensor, a displacement sensor, and a controller, so that the particle impact composite damper can actively realize the power on and off of the electromagnet and the pop-up or retraction of the retractable baffle through the change of the vibration effect or the change of the baffle position, thereby realizing the function of adjusting the filling rate of the particle damper and the impact cycle of the impact damper, and can realize the adaptive adjustment of the separate operation or joint operation of the particle damper and the impact damper, thereby improving the robustness of the structure under the action of vibration excitation.

[0043] (3) The particle impact composite damper provided by the present invention can change the filling rate of the damper according to demand, increase the fluidity of the device when the excitation effect is large, improve the energy dissipation performance of the damper, and has good robustness and wide applicability.

[0044] (4) The particle impact composite damper provided by the present invention responds to the design principle of low carbon and energy saving. The particle filling rate of the particle damper is changed by the displacement of the impact damper. In the case of no excitation or small excitation, the device does not require external energy input, and the particle damper and the impact damper complete the passive vibration reduction control.

[0045] (5) The displacement sensor in the present invention can monitor and adjust the filling rate of the particle damper and the impact range of the impact damper in real time. It can cooperate with the control strategy to analyze the vibration information of the excitation in advance and reduce the impact of the device's time lag, which is in line with the "intelligent and controllable" design strategy. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a front view of the particle impact composite damper shown in Example 1 (the electromagnet is not energized);

[0047] Figure 2 It is a side view of the particle impact composite damper shown in Example 1;

[0048] Figure 3 for Figure 1 A magnified schematic diagram of part A;

[0049] Figure 4 This is a schematic structural diagram of the baffle shown in Example 1;

[0050] Figure 5 This is a front view of the particle impact composite damper shown in Example 1 (with the electromagnet energized).

[0051] Description of the marks in the figure:

[0052] 1-damper cavity, 11-first chamber, 12-second chamber, 13-buffer layer;

[0053] 2- baffle, 21- connecting block, 22- retractable baffle, 23- displacement sensor;

[0054] 3-granules;

[0055] 4-impact damper, 41-impact block, 411-buffer pad, 42-impact shell, 421-pulley;

[0056] 5- Magnet;

[0057] 6-electromagnet;

[0058] 7-track;

[0059] 8-tooth track. DETAILED DESCRIPTION

[0060] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are based on the technical solutions of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve the corresponding functions.

[0061] It should be noted that in the description of the present invention, the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0063] A particle impact composite damper, comprising:

[0064] Damper cavity 1;

[0065] a movable baffle 2 located in the damper cavity 1, which divides the damper cavity 1 into a first chamber 11 and a second chamber 12;

[0066] Setting a plurality of particles 3 in the first chamber 11;

[0067] A plurality of impact dampers 4 are provided in the second chamber 12 and move toward or away from the baffle 2, including an impact block 41 fixed to the bottom surface of the damper chamber 1, and an impact shell 42 which is sleeved outside the impact block 41 and is used to collide with the impact block 41;

[0068] A magnet 5 provided on one end of the impact block 41 close to the baffle 2;

[0069] And an electromagnet 6 is arranged on the side of the baffle 2 facing the second chamber 12 and attracted to the magnet 5. When energized, the electromagnet 6 has a magnetic pole opposite to that of the magnet 5.

[0070] In some specific embodiments, the electromagnet 6 has no magnetism when it is not energized, and has a magnetic pole opposite to that of the magnet 5 when it is energized, thereby attracting each other.

[0071] In some specific embodiments, the electromagnet 6 is mainly composed of an iron core material, a winding material and a shell material. When the electromagnet is energized, the iron core material is magnetized, enhancing the magnetism of the electromagnet 6; when the power is off, the iron core material is quickly demagnetized, causing the electromagnet 6 to lose its magnetism.

[0072] In some specific embodiments, the core material is silicon steel sheet or soft iron rod; the winding material is copper wire, aluminum wire or nickel wire; and the shell material is plastic or wood.

[0073] In some specific embodiments, the impact shell 42 has an open bottom, and the size of the impact shell 42 is larger than the size of the impact block 41 .

[0074] In some specific embodiments, the impact block 41 is a rectangular parallelepiped, the impact shell 42 is a rectangular parallelepiped without a bottom cover, and the volume of the impact shell 42 is 2.475 to 5.85 times the volume of the impact block 41 .

[0075] In some specific embodiments, the length, width, and height of the impact shell 42 are 1.5 to 2.5 times, 1.1 to 1.3 times, and 1.5 to 1.8 times the length, width, and height of the impact block 41 , respectively.

[0076] In some specific embodiments, the impact block 41 is a cube structure.

[0077] In some specific embodiments, buffer pads 411 are provided on both sides of the impact block 41 to alleviate the wear of the material surface caused by the collision between the impact block 41 and the impact shell 42, thereby extending the life of the damper.

[0078] A plurality of pulleys 421 are provided at the bottom of the impact shell 42 .

[0079] In some specific embodiments, the material of the buffer pad 411 includes rubber, plastic or foam.

[0080] In some specific embodiments, the bottom surface of the damper cavity 1 is provided with a plurality of tracks 7 for the baffle 2 to move, and the tracks 7 are perpendicular to the baffle 2 .

[0081] In some specific embodiments, the track 7 is a straight track, and its length is equal to the sum of the lengths of the first chamber 11 and the second chamber 12 .

[0082] In some specific embodiments, a toothed track 8 is provided on the top surface of the damper cavity 1, and a gap is provided between the highest point of the baffle 2 and the lowest point of the toothed track 8, so that the baffle 2 and the toothed track 8 are not in contact, thereby reducing the impact of unnecessary friction on the damper performance;

[0083] A connecting block 21 is provided on the top side wall of the baffle 2 , and a retractable baffle 22 is provided on the connecting block 21 for popping up and supporting the toothed track 8 .

[0084] In some specific embodiments, the length of the toothed track 8 is equal to the sum of the lengths of the first chamber 11 and the second chamber 12 .

[0085] In some specific embodiments, the damper further comprises a vibration sensor for being mounted on a building structure and for detecting vibration effects thereof.

[0086] In some specific embodiments, a displacement sensor 23 is installed on the baffle 2 and is used to detect the distance between the baffle 2 and the side wall of the damper cavity 1 .

[0087] In some specific embodiments, the vibration sensor and the displacement sensor 23 are electrically connected to a controller, and the controller is electrically connected to the retractable baffle 22 and the electromagnet 6 respectively;

[0088] When the building structure is stationary, the vibration sensor does not detect a vibration signal. At this time, the electromagnet 6 is not energized, the retractable baffle 22 pops up to support the toothed track 8, the baffle 2 is fixed in position, and the displacement sensor 23 does not work.

[0089] When the building structure is subjected to vibration, the vibration sensor detects the vibration signal, converts the vibration signal into an electrical signal and transmits it to the controller. When the detected vibration signal is lower than the set vibration signal, the controller controls the electromagnet 6 to be de-energized, controls the retractable baffle 22 to pop up and press against the toothed track 8, so that the position of the baffle 2 is fixed, and at this time the displacement sensor 23 does not work; when the detected vibration signal is higher than or equal to the set vibration signal, and the vibration signal is increasing, the controller controls the electromagnet 6 to be energized, so that the electromagnet 6 and the magnet 5 attract each other, controls the retractable baffle 22 to retract and separate from the toothed track 8, so that the baffle 2 can move, and at this time the displacement sensor 23 does not work;

[0090] When the detected vibration signal reaches the highest value, the controller controls the displacement sensor 23 to work, detects the distance between the baffle 2 and the side wall of the damper cavity 1, and converts the displacement signal into an electrical signal and transmits it to the controller. When the baffle 2 moves to the set position, the controller controls the electromagnet 6 to cut off the power, and at the same time controls the retractable baffle 22 to pop up and support the toothed track 8, so that the position of the baffle 2 is fixed.

[0091] In some specific embodiments, the controller is a PLC controller.

[0092] In some specific embodiments, the vibration signal of the building structure is in the form of a sine wave.

[0093] In some specific embodiments, the inner wall of the damper cavity 1 is provided with a buffer layer 13, which is obtained by coating the inner wall of the damper cavity 1 with a buffer material, and is used to reduce the collision between the particles 3 and the first chamber 11, thereby increasing the life of the damper.

[0094] In some specific embodiments, the cushioning material includes rubber, plastic or foam.

[0095] In some specific embodiments, the particles 3 are spherical and have a diameter of 5 to 10 mm.

[0096] In some specific embodiments, the particles 3 , the damper cavity 1 , the impact block 41 , the impact shell 42 , the track 7 , and the toothed track 8 are all made of steel.

[0097] The above embodiments can be implemented individually or in any combination of two or more.

[0098] Example 1

[0099] A particle impact composite damper, such as Figures 1 to 5 As shown, including:

[0100] Damper cavity 1;

[0101] a movable baffle 2 located in the damper cavity 1, which divides the damper cavity 1 into a first chamber 11 and a second chamber 12;

[0102] Setting a plurality of particles 3 in the first chamber 11;

[0103] The impact damper 4 is arranged in the second chamber 12 and moves in a direction close to or away from the baffle 2, and includes an impact block 41 fixed to the bottom surface of the damper cavity 1, and an impact shell 42 sleeved outside the impact block 41 and used to collide with the impact block 41;

[0104] A magnet 5 provided on one end of the impact block 41 close to the baffle 2;

[0105] An electromagnet 6 is disposed on the side of the baffle 2 facing the second chamber 12 and is attracted to the magnet 5. When energized, its magnetic poles are opposite those of the magnet 5. The electromagnet 6 is primarily composed of an iron core, a winding, and a casing. When energized, the core becomes magnetized, enhancing the magnetism of the electromagnet 6. When de-energized, the core rapidly demagnetizes, causing the electromagnet 6 to lose its magnetism. The iron core is made of a soft iron rod; the winding is made of copper wire; and the casing is made of plastic.

[0106] In this embodiment, the electromagnet 6 has no magnetism when it is not energized, and has a magnetic pole opposite to that of the magnet 5 when it is energized, thereby attracting each other.

[0107] In this embodiment, the impact shell 42 has an open bottom, and the size of the impact shell 42 is larger than the size of the impact block 41 .

[0108] In this embodiment, the impact block 41 is a cube structure.

[0109] In this embodiment, buffer pads 411 are provided on both sides of the impact block 41 to alleviate the wear of the material surface caused by the collision between the impact block 41 and the impact shell 42, thereby extending the life of the damper.

[0110] Four pulleys 421 are provided at the bottom of the impact shell 42 .

[0111] In this embodiment, the buffer pad 411 is made of rubber.

[0112] In this embodiment, the bottom surface of the damper chamber 1 is provided with two tracks 7 for the movement of the baffle 2, which are perpendicular to the baffle 2. The tracks 7 are straight tracks, and their length is equal to the sum of the lengths of the first chamber 11 and the second chamber 12. The pulley 421 of the impact housing 42 is placed on the tracks 7, and the impact block 41 is located between the two tracks 7.

[0113] In this embodiment, a toothed track 8 is provided on the top surface inside the damper cavity 1, and there is a gap between the highest point of the baffle 2 and the lowest point of the toothed track 8, so that the baffle 2 and the toothed track 8 have no contact, so as to reduce the impact of unnecessary friction on the damper performance; a connecting block 21 is provided on the top side wall of the baffle 2, and a retractable baffle 22 is provided on the connecting block 21 for popping up to support the toothed track 8.

[0114] In this embodiment, the length of the toothed track 8 is equal to the sum of the lengths of the first chamber 11 and the second chamber 12 .

[0115] In this embodiment, limit blocks are provided on both sides of the toothed track 8 to prevent the baffle 2 from moving out of the toothed track 8 .

[0116] In this embodiment, a buffer layer 13 is provided on the inner wall of the damper cavity 1, which is obtained by coating the inner wall of the damper cavity 1 with a buffer material, and is used to reduce the collision between the particles 3 and the first cavity 11, thereby increasing the life of the damper.

[0117] In this embodiment, the buffer material is rubber.

[0118] In this embodiment, the particles 3 are spherical and have a diameter of 5 to 10 mm.

[0119] In this embodiment, the damper cavity 1 is a rectangular parallelepiped structure with a length, width, and height of 250 mm, 100 mm, and 200 mm, respectively. The impact block 41 is a cube with a side length of 50 mm. The impact shell 42 is an uncovered rectangular parallelepiped structure with a length, width, and height of 80 mm, 60 mm, and 100 mm, respectively. The length, width, and height of the impact shell 42 are respectively 2 times, 1.2 times, and 1.6 times the length, width, and height of the impact block 41, and the volume of the impact shell 42 is 3.84 times the volume of the impact block 41.

[0120] In this embodiment, the length of the track 7 is 250 mm, and the spacing between the tracks 7 is 60 mm.

[0121] In this embodiment, the length of the toothed track 8 is 250 mm.

[0122] In this embodiment, the particles 3, the damper cavity 1, the impact block 41, the impact shell 42, the track 7, and the toothed track 8 are all made of steel.

[0123] In this embodiment, the damper further comprises a vibration sensor for being mounted on a building structure and for detecting the vibration effect thereof.

[0124] In this embodiment, the working principle of the particle impact composite damper is:

[0125] When the building is stationary, the electromagnet 6 is de-energized, the retractable baffle 22 pops up to support the toothed track 8, and the baffle 2 is fixed in position. At this time, the particles 3, impact block 41, and impact shell 42 are stationary, and the particle impact composite damper is in an initial state.

[0126] When the building structure is subjected to vibration, the vibration sensor detects a vibration signal. When the detected vibration signal is lower than the set vibration signal, the electromagnet 6 is de-energized, and the retractable baffle 22 pops up to press against the toothed track 8, fixing the position of the baffle 2. At this time, the particles 3 and the impact damper 4 act independently. The filling rate of the particles 3 in the first chamber 11 is fixed. The particles 3 dissipate energy in the first chamber 11 through mutual collisions between the particles 3, collisions between the particles 3 and the damper cavity 1, and collisions between the particles 3 and the baffle 2. This is the energy dissipation of the particle damper. The impact shell 42 moves freely along the track 7 in the second chamber 12. Since the impact block 41 and the baffle 2 are fixed in position, the impact shell 42 collides with the impact block 41 and / or the baffle 2, dissipating energy. This is the energy dissipation of the impact damper.

[0127] When the building structure is subjected to vibration, the vibration sensor detects a vibration signal. When the detected vibration signal is greater than or equal to a set vibration signal, the electromagnet 6 is energized, causing attraction between the electromagnet 6 and the magnet 5. The retractable baffle 22 retracts and separates from the toothed track 8, allowing the baffle 2 to move. At this point, the impact damper 4 and baffle 2 are integrally connected and move together along the track 7. The filling rate of the particles 3 within the first chamber 11 changes with the movement of the baffle 2. Within the first chamber 11, the particles 3 dissipate energy through collisions with each other, with the damper cavity 1, and with the baffle 2. This is energy dissipated by the particle damper. The impact shell 42 and the baffle 2 move freely along the track 7 within the second chamber 12. Since the impact block 41 is fixed in position, the impact shell 42 and the impact block 41 collide and dissipate energy. This is energy dissipated by the impact damper. This device increases collision efficiency and exhibits improved fluidity, improving the vibration damping performance of the particle impact composite damper.

[0128] Example 2

[0129] A particle impact composite damper, comprising:

[0130] Damper cavity 1;

[0131] a movable baffle 2 located in the damper cavity 1, which divides the damper cavity 1 into a first chamber 11 and a second chamber 12;

[0132] Setting a plurality of particles 3 in the first chamber 11;

[0133] The impact damper 4 is arranged in the second chamber 12 and moves in a direction close to or away from the baffle 2, and includes an impact block 41 fixed to the bottom surface of the damper cavity 1, and an impact shell 42 sleeved outside the impact block 41 and used to collide with the impact block 41;

[0134] A magnet 5 provided on one end of the impact block 41 close to the baffle 2;

[0135] And an electromagnet 6 is arranged on the side of the baffle 2 facing the second chamber 12 and attracted to the magnet 5. When energized, the electromagnet 6 has a magnetic pole opposite to that of the magnet 5.

[0136] In this embodiment, the electromagnet 6 has no magnetism when it is not energized, and has a magnetic pole opposite to that of the magnet 5 when it is energized, thereby attracting each other.

[0137] In this embodiment, the impact shell 42 has an open bottom, and the size of the impact shell 42 is larger than the size of the impact block 41 .

[0138] In this embodiment, the impact block 41 is a cube structure.

[0139] In this embodiment, buffer pads 411 are provided on both sides of the impact block 41 to alleviate the wear of the material surface caused by the collision between the impact block 41 and the impact shell 42, thereby extending the life of the damper.

[0140] Four pulleys 421 are provided at the bottom of the impact shell 42 .

[0141] In this embodiment, the buffer pad 411 is made of rubber.

[0142] In this embodiment, the bottom surface of the damper chamber 1 is provided with two tracks 7 for the movement of the baffle 2, which are perpendicular to the baffle 2. The tracks 7 are straight tracks, and their length is equal to the sum of the lengths of the first chamber 11 and the second chamber 12. The pulley 421 of the impact housing 42 is placed on the tracks 7, and the impact block 41 is located between the two tracks 7.

[0143] In this embodiment, a toothed track 8 is provided on the top surface of the damper cavity 1. A gap is provided between the highest point of the baffle 2 and the lowest point of the toothed track 8, so that the baffle 2 and the toothed track 8 do not contact each other, thereby reducing the impact of unnecessary friction on the damper performance.

[0144] A connecting block 21 is provided on the top side wall of the baffle 2 , and a retractable baffle 22 is provided on the connecting block 21 for popping up and supporting the toothed track 8 .

[0145] In this embodiment, the length of the toothed track 8 is equal to the sum of the lengths of the first chamber 11 and the second chamber 12 .

[0146] In this embodiment, limit blocks are provided on both sides of the toothed track 8 to prevent the baffle 2 from moving out of the toothed track 8 .

[0147] In this embodiment, a buffer layer 13 is provided on the inner wall of the damper cavity 1, which is obtained by coating the inner wall of the damper cavity 1 with a buffer material, and is used to reduce the collision between the particles 3 and the first cavity 11, thereby increasing the life of the damper.

[0148] In this embodiment, the buffer material is rubber.

[0149] In this embodiment, the particles 3 are spherical and have a diameter of 5 to 10 mm.

[0150] In this embodiment, the damper cavity 1 is a rectangular parallelepiped structure with a length, width, and height of 250 mm, 100 mm, and 200 mm, respectively. The impact block 41 is a cube with a side length of 50 mm. The impact shell 42 is an uncovered rectangular parallelepiped structure with a length, width, and height of 80 mm, 60 mm, and 100 mm, respectively. The length, width, and height of the impact shell 42 are respectively 2 times, 1.2 times, and 1.6 times the length, width, and height of the impact block 41, and the volume of the impact shell 42 is 3.84 times the volume of the impact block 41.

[0151] In this embodiment, the length of the track 7 is 250 mm, and the spacing between the tracks 7 is 60 mm.

[0152] In this embodiment, the length of the toothed track 8 is 250 mm.

[0153] In this embodiment, the particles 3, the damper cavity 1, the impact block 41, the impact shell 42, the track 7, and the toothed track 8 are all made of steel.

[0154] In this embodiment, the damper further comprises a vibration sensor for being mounted on a building structure and for detecting the vibration effect thereof.

[0155] In this embodiment, the damper is further mounted on the baffle 2 and is used to detect the distance between the baffle 2 and the side wall of the damper cavity 1 by a displacement sensor 23;

[0156] The vibration sensor and displacement sensor 23 are electrically connected to a controller, and the controller is electrically connected to the retractable baffle 22 and the electromagnet 6 respectively;

[0157] When the building structure is stationary, the vibration sensor does not detect a vibration signal. At this time, the electromagnet 6 is not energized, the retractable baffle 22 pops up to support the toothed track 8, the baffle 2 is fixed in position, and the displacement sensor 23 does not work.

[0158] When the building structure is subjected to vibration, the vibration sensor detects the vibration signal, converts the vibration signal into an electrical signal and transmits it to the controller. When the detected vibration signal is lower than the set vibration signal, the controller controls the electromagnet 6 to be de-energized, controls the retractable baffle 22 to pop up and press against the toothed track 8, so that the position of the baffle 2 is fixed, and at this time the displacement sensor 23 does not work; when the detected vibration signal is higher than or equal to the set vibration signal, and the vibration signal is increasing, the controller controls the electromagnet 6 to be energized, so that the electromagnet 6 and the magnet 5 attract each other, controls the retractable baffle 22 to retract and separate from the toothed track 8, so that the baffle 2 can move, and at this time the displacement sensor 23 does not work;

[0159] When the detected vibration signal reaches the highest value, the controller controls the displacement sensor 23 to work, detects the distance between the baffle 2 and the side wall of the damper cavity 1, and converts the displacement signal into an electrical signal and transmits it to the controller. When the baffle 2 moves to the set position, the controller controls the electromagnet 6 to cut off the power, and at the same time controls the retractable baffle 22 to pop up and support the toothed track 8, so that the position of the baffle 2 is fixed.

[0160] In this embodiment, the controller is PLC control.

[0161] In this embodiment, the vibration signal of the building structure is in the form of a sine wave.

[0162] In this embodiment, the working principle of the particle impact composite damper is:

[0163] When the building structure is stationary, the vibration sensor detects no vibration signal. At this time, the electromagnet 6 is de-energized, the retractable baffle 22 pops up to press against the toothed track 8, the baffle 2 is fixed in position, and the displacement sensor 23 is inoperative. At this time, the particles 3, impact block 41, and impact shell 42 are stationary, and the particle impact composite damper is in its initial state.

[0164] When the building structure is subjected to vibration, the vibration sensor detects the vibration signal, converts it into an electrical signal, and transmits it to the controller. When the detected vibration signal is lower than the set vibration signal, the controller deenergizes the electromagnet 6 and controls the retractable baffle 22 to pop up and press against the toothed track 8, fixing the position of the baffle 2. At this time, the displacement sensor 23 is inoperative. At this time, the particles 3 and the impact damper 4 act independently. The filling rate of the particles 3 in the first chamber 11 is fixed. The particles 3 dissipate energy in the first chamber 11 through collisions with each other, collisions with the damper cavity 1, and collisions with the baffle 2. This is energy dissipated by the particle damper. The impact shell 42 moves freely along the track 7 within the second chamber 12. Since the impact block 41 and the baffle 2 are fixed in position, the impact shell 42 collides with the impact block 41 and / or the baffle 2, dissipating energy. This is energy dissipated by the impact damper.

[0165] When the building structure is subjected to vibration, the vibration sensor detects the vibration signal, converts the vibration signal into an electrical signal and transmits it to the controller. When the detected vibration signal is higher than or equal to the set vibration signal and the vibration signal is increasing, the controller controls the electromagnet 6 to be energized, so that the electromagnet 6 and the magnet 5 attract each other, controls the retractable baffle 22 to retract and separate from the toothed track 8, so that the baffle 2 can move. At this time, the displacement sensor 23 does not work. At this time, the impact damper 4 and the baffle 2 are connected as a whole and move together along the track 7. The filling rate of the particles 3 in the first chamber 11 changes with the movement of the baffle 2. The particles 3 dissipate energy in the first chamber 11 through mutual collisions between the particles 3, collisions between the particles 3 and the damper cavity 1, and collisions between the particles 3 and the baffle 2. This is the energy dissipation of the particle damper. The impact shell 42 and the baffle 2 move freely along the track 7 in the second chamber 12. Since the impact block 41 is fixed in position, the impact shell 42 and the impact block 41 collide and dissipate energy. This is the energy dissipation of the impact damper. The device has increased collision efficiency and better fluidity, and the vibration reduction performance of the particle impact composite damper is improved.

[0166] When the building structure is subjected to vibration, the vibration sensor detects the vibration signal, converts the vibration signal into an electrical signal, and transmits it to the controller. When the detected vibration signal reaches its maximum value, the controller controls the displacement sensor 23 to operate, detects the distance between the baffle 2 and the side wall of the damper cavity 1, and converts the displacement signal into an electrical signal and transmits it to the controller. When the baffle 2 moves to the set position, the controller controls the electromagnet 6 to cut off the power and controls the retractable baffle 22 to pop up and support the toothed track 8, fixing the position of the baffle 2. At this time, the particle impact composite damper returns to a state where the particles 3 and the impact damper 4 act separately.

[0167] Although the present invention has been described in detail above using general explanations, specific embodiments, and experiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the present invention. Therefore, such modifications and improvements, which do not depart from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A particle impact composite damper, characterized in that: It is installed on the building structure for vibration reduction. The damper includes: Damper cavity (1); a movable baffle (2) located in the damper cavity (1), which separates the damper cavity (1) into a first chamber (11) and a second chamber (12); Disposing a plurality of particles (3) in the first chamber (11); A plurality of impact dampers (4) are arranged in the second chamber (12) and move in a direction close to or away from the baffle (2), comprising an impact block (41) fixed to the inner bottom surface of the damper chamber (1), and an impact shell (42) sleeved outside the impact block (41) and used to collide with the impact block (41); A magnet (5) disposed on one end of the impact block (41) close to the baffle (2); and an electromagnet (6) disposed on a side of the baffle (2) facing the second chamber (12) and attracted to the magnet (5), wherein the electromagnet (6) has a magnetic pole opposite to that of the magnet (5) when energized; A toothed track (8) is provided on the top surface inside the damper cavity (1), and a gap exists between the highest point of the baffle (2) and the lowest point of the toothed track (8); A connecting block (21) is provided on the top side wall of the baffle (2), and a retractable baffle (22) is provided on the connecting block (21) for popping up to support the toothed track (8); The damper further comprises a vibration sensor for mounting on the building structure and for detecting the vibration effect thereof; The damper further comprises a displacement sensor (23) mounted on the baffle (2) and used to detect the distance between the baffle (2) and the side wall of the damper cavity (1); The vibration sensor and the displacement sensor (23) are electrically connected to a controller, and the controller is electrically connected to the retractable baffle (22) and the electromagnet (6) respectively; When the building structure is stationary, the vibration sensor does not detect a vibration signal, the electromagnet (6) is not energized, the retractable baffle (22) pops up to support the toothed track (8), the baffle (2) is fixed in position, and the displacement sensor (23) does not operate; When the building structure is subjected to vibration, the vibration sensor detects a vibration signal, converts the vibration signal into an electrical signal and transmits it to the controller; when the detected vibration signal is lower than the set vibration signal, the controller controls the electromagnet (6) to be de-energized, controls the retractable baffle (22) to pop up and press against the toothed track (8), so that the baffle (2) is fixed in position, and at this time the displacement sensor (23) does not work; when the detected vibration signal is higher than or equal to the set vibration signal, and the vibration signal is increasing, the controller controls the electromagnet (6) to be energized, so that the electromagnet (6) and the magnet (5) attract each other, controls the retractable baffle (22) to retract and separate from the toothed track (8), so that the baffle (2) can move, and at this time the displacement sensor (23) does not work; When the detected vibration signal reaches the highest value, the controller controls the displacement sensor (23) to work, detects the distance between the baffle (2) and the side wall of the damper cavity (1), and converts the displacement signal into an electrical signal and transmits it to the controller. When the baffle (2) moves to the set position, the controller controls the electromagnet (6) to cut off the power, and at the same time controls the retractable baffle (22) to pop up and press against the toothed track (8), so that the position of the baffle (2) is fixed.

2. The particle impact composite damper according to claim 1, characterized in that: The impact shell (42) has an open bottom, and the size of the impact shell (42) is larger than the size of the impact block (41).

3. The particle impact composite damper according to claim 2, characterized in that: The impact block (41) is a rectangular parallelepiped, the impact shell (42) is a rectangular parallelepiped with no bottom cover, and the volume of the impact shell (42) is 2.4 to 5.85 times the volume of the impact block (41).

4. The particle impact composite damper according to claim 1, characterized in that: Buffer pads (411) are provided on both sides of the impact block (41); A plurality of pulleys (421) are provided at the bottom of the impact shell (42).

5. The particle impact composite damper according to claim 1, characterized in that: The bottom surface inside the damper cavity (1) is provided with a plurality of tracks (7) for the baffle (2) to move, and the tracks are perpendicular to the baffle (2).

6. The particle impact composite damper according to claim 5, characterized in that: The track (7) is a straight track, the length of which is equal to the sum of the lengths of the first chamber (11) and the second chamber (12).

7. The particle impact composite damper according to claim 1, characterized in that: The vibration signal of the building structure is in the form of a sine wave.

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