Particle impact composite damper

Abstract

The invention relates to a particle impact composite damper which is installed on a building structure and used for damping, and the damper comprises a damper cavity, a particle impact layer and a particle impact layer, the movable baffle is located in the damper cavity and divides the damper cavity into a first cavity body and a second cavity body. The particles are arranged in the first chamber; the impact dampers are arranged in the second cavity and move in the direction close to or away from the baffle, and each impact damper comprises an impact block and an impact shell which is arranged outside the impact block in a sleeving mode and used for colliding with the impact block; the magnet is arranged at one end of the impact block close to the baffle; the electromagnet is arranged on one side, facing the second cavity, of the baffle and attracts the magnet, and the magnetic pole of the electromagnet is opposite to that of the magnet when the electromagnet is electrified. Compared with the prior art, the particle damper combines the advantages of a traditional particle damper and an impact damper, has the advantages of being high in vibration reduction efficiency and wide in application range, and can meet the actual application requirements of mechanical engineering or civil engineering.

Description

Technical Field

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

[0002] Vibration control is a crucial technology and is widely used in various structural systems. Among them, particle dampers and impact dampers are two common vibration reduction devices. Particle dampers use the collision and friction between particles and between particles and cavity walls to dissipate vibration energy. They have the characteristics of simple structure and easy installation. However, traditional particle dampers show poor fluidity and low energy dissipation efficiency under low-frequency vibration conditions. In particular, the mutual collision of particles is weak under low-frequency vibration, resulting in poor vibration reduction effect. Impact dampers dissipate vibration energy through the collision between the impact block and the shell. They can play a good vibration reduction role under high-frequency vibration, but under low-frequency conditions, due to the low collision frequency between the impact blocks, the energy dissipation efficiency is insufficient. Therefore, the existing single particle damper or impact damper often fails to achieve ideal vibration reduction effect when dealing with vibrations in multiple frequency ranges.

[0003] Patent publication number CN111075046A discloses a variable volume particle damper, which combines a particle damper, an impact damper, and a tuned damper. However, at least one movable baffle is provided in the damper cavity, and the baffle is connected to the inner wall of the damper cavity by one or more elastic connectors. The baffle divides the damper cavity into different chambers, and particles or particle groups are arranged in the chambers. It mainly enhances the collision of particles by volume changes, and cannot automatically adjust its working state according to the frequency and amplitude changes of external vibrations, which limits the applicability of the damper in complex dynamic environments and makes it difficult to meet the diverse requirements 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, which combines the advantages of traditional particle dampers and impact dampers, 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 in the first chamber;

[0010] A plurality of impact dampers arranged in the second chamber and moving in a direction close to or away from the baffle, including an impact block fixed to the bottom surface of the damper chamber, and an impact shell sleeved outside the impact block and used to collide with the impact block;

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

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

[0013] Furthermore, the electromagnet has no magnetism when no electricity is supplied, and has a magnetic pole opposite to that of the magnet when electricity is supplied, thereby attracting each other.

[0014] Furthermore, the electromagnet 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; when the power is off, the iron core material is rapidly demagnetized, causing the electromagnet to lose its magnetism.

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

[0016] Furthermore, the impact shell has an opening at the bottom, 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 cover at the bottom, 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 cubic structure.

[0020] Furthermore, buffer pads are provided on both sides of the impact block, which can alleviate the loss 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 arranged 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, and the tracks 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, so as to reduce the influence of unnecessary friction on the damper performance;

[0026] A connecting block is disposed on the top side wall of the baffle, and a retractable baffle for popping up and supporting the toothed track is disposed 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 the 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 does not detect a 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 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 to not be energized, controls the retractable baffle to pop up and hold the toothed track, so that the baffle is fixed, and the displacement sensor does not work at this time; 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 is movable, and the displacement sensor does not work at this time;

[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 position of the baffle 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 chamber, thereby increasing the life of the damper.

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

[0038] Furthermore, the particles are spherical and have 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 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 combined 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 passive vibration reduction control is completed by the particle damper and the impact damper.

[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, and can cooperate with the control strategy to analyze the vibration information of the excitation in advance, reduce the impact of the device's time lag, and comply with the "intelligent controllable" design strategy. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It 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 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 (the electromagnet is energized).

[0051] Description of the markings 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- Toothed track. DETAILED DESCRIPTION

[0060] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or embodiments, if there is no special description of the functional components or structures, it means that they are all 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", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0062] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to 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 arranged 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 cavity 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 disposed on one end of the impact block 4 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 , and its magnetic pole is opposite to that of the magnet 5 when energized.

[0070] In some specific embodiments, the electromagnet 6 has no magnetism when no electricity is supplied, and has a magnetic pole opposite to that of the magnet 5 when electricity is supplied, thereby attracting each other.

[0071] In some specific embodiments, the electromagnet 6 is mainly composed of a core material, a winding material and a shell material. When the electromagnet is energized, the core material is magnetized to enhance the magnetism of the electromagnet 6; when the power is off, the core material is rapidly demagnetized to cause 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 opening at the 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 cubic structure.

[0077] In some specific embodiments, buffer pads 411 are provided on both sides of the impact block 41, which can alleviate the loss 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 disposed 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, a plurality of tracks 7 for the baffle plate 2 to move are disposed on the bottom surface of the damper cavity 1 and are perpendicular to the baffle plate 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 is not in contact with the toothed track 8, so as to reduce the influence of unnecessary friction on the damper performance;

[0083] A connecting block 21 is disposed on the top side wall of the baffle 2 , and a retractable baffle 22 is disposed 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 the vibration effect thereof.

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

[0087] In some specific embodiments, 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;

[0088] When the building structure is stationary, the vibration sensor does not detect a vibration signal, at which 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 not be energized, controls the retractable baffle 22 to pop up and hold the toothed track 8, so that the baffle 2 is fixed in position, and the displacement sensor 23 does not work at this time; 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 be moved, and the displacement sensor 23 does not work at this time;

[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 control.

[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 buffer 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 which is sleeved outside the impact block 41 and is used to collide with the impact block 41;

[0104] A magnet 5 disposed on one end of the impact block 4 close to the baffle 2;

[0105] And an electromagnet 6 is arranged on the side of the baffle 2 facing the second chamber 12 and attracted to the magnet 5, and its magnetic pole is opposite to the magnetic pole of the magnet 5 when it is powered on. The electromagnet 6 is mainly composed of an iron core material, a winding material and a shell material. When the electromagnet is powered on, the iron core material is magnetized to enhance the magnetism of the electromagnet 6; when the power is off, the iron core material is quickly demagnetized to make the electromagnet 6 lose its magnetism. The iron core material is a soft iron rod; the winding material is a copper wire; and the shell material is plastic.

[0106] In this embodiment, the electromagnet 6 has no magnetism when no electricity is supplied, and has a magnetic pole opposite to that of the magnet 5 when electricity is supplied, thereby attracting each other.

[0107] In this embodiment, the impact shell 42 has an opening at the 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 cubic structure.

[0109] In this embodiment, buffer pads 411 are provided on both sides of the impact block 41, which can alleviate the loss 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 disposed at the bottom of the impact shell 42 .

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

[0112] In this embodiment, the bottom surface of the damper cavity 1 is provided with two tracks 7 for the baffle 2 to move, which are perpendicular to the baffle 2. 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. The pulley 421 of the impact shell 42 is placed on the track 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 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 has no contact with the toothed track 8, so as to reduce the influence 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, and its length, width, and height are 250mm, 100mm, and 200mm respectively; the impact block 41 is a cube structure, and its side length is 50mm; the impact shell 42 is a rectangular parallelepiped structure without a bottom cover, and its length, width, and height are 80mm, 60mm, and 100mm respectively. The length, width, and height of the impact shell 42 are 2 times, 1.2 times, and 1.6 times of the length, width, and height of the impact block 41 respectively, 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 the 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 not 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 signal is detected by the vibration sensor. When the detected vibration signal is lower than the set vibration signal, the electromagnet 6 is not energized, and the retractable baffle 22 pops up to support the toothed track 8, so that the baffle 2 is fixed in position. At this time, the particles 3 and the impact damper 4 act separately, and the filling rate of the particles 3 in the first chamber 11 is fixed. The particles 3 in the first chamber 11 dissipate energy 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 consumption of the particle damper; the impact shell 42 moves freely along the track 7 in the second chamber 12. Since the impact block 41 is fixed in position and the baffle 2 is fixed in position, the impact shell 42 collides with the impact block 41 and / or the baffle 2 to dissipate energy, which is the energy consumption of the impact damper.

[0127] When the building structure is subjected to vibration, the vibration signal is detected by the vibration sensor. When the detected vibration signal is higher than or equal to the set vibration signal, the electromagnet 6 is energized to attract the electromagnet 6 and the magnet 5, and the retractable baffle 22 is retracted and separated from the toothed track 8, so that the baffle 2 can move. At this time, the impact damper 4 is connected to the baffle 2 as a whole and moves 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 in the first chamber 11 dissipate energy 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 consumption 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 position of the impact block 41 is fixed, the impact shell 42 and the impact block 41 collide and dissipate energy. This is the energy consumption of the impact damper. The device has increased collision efficiency and good fluidity, and the vibration reduction performance of the particle impact composite damper is improved.

[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 which is sleeved outside the impact block 41 and is used to collide with the impact block 41;

[0134] A magnet 5 disposed on one end of the impact block 4 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 , and its magnetic pole is opposite to that of the magnet 5 when energized.

[0136] In this embodiment, the electromagnet 6 has no magnetism when no electricity is supplied, and has a magnetic pole opposite to that of the magnet 5 when electricity is supplied, thereby attracting each other.

[0137] In this embodiment, the impact shell 42 has an opening at the 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 cubic structure.

[0139] In this embodiment, buffer pads 411 are provided on both sides of the impact block 41, which can alleviate the loss 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 disposed at the bottom of the impact shell 42 .

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

[0142] In this embodiment, the bottom surface of the damper cavity 1 is provided with two tracks 7 for the baffle 2 to move, which are perpendicular to the baffle 2. 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. The pulley 421 of the impact shell 42 is placed on the track 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, 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 influence of unnecessary friction on the damper performance;

[0144] A connecting block 21 is disposed on the top side wall of the baffle 2 , and a retractable baffle 22 is disposed 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, and its length, width, and height are 250mm, 100mm, and 200mm respectively; the impact block 41 is a cube structure, and its side length is 50mm; the impact shell 42 is a rectangular parallelepiped structure without a bottom cover, and its length, width, and height are 80mm, 60mm, and 100mm respectively. The length, width, and height of the impact shell 42 are 2 times, 1.2 times, and 1.6 times of the length, width, and height of the impact block 41 respectively, 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 the building structure and for detecting the vibration effect thereof.

[0155] In this embodiment, the damper is also mounted on the baffle plate 2 and is used to detect the distance between the baffle plate 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 which 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 not be energized, controls the retractable baffle 22 to pop up and hold the toothed track 8, so that the baffle 2 is fixed in position, and the displacement sensor 23 does not work at this time; 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 be moved, and the displacement sensor 23 does not work at this time;

[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 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, and the displacement sensor 23 does not work. At this time, the particles 3, the impact block 41, and the impact shell 42 are stationary, and the particle impact composite damper is in an initial state.

[0164] 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 not be energized, controls the retractable baffle 22 to pop up and support the toothed track 8, so that the baffle 2 is fixed in position, and the displacement sensor 23 does not work at this time. At this time, the particles 3 and the impact damper 4 act separately, the filling rate of the particles 3 in the first chamber 11 is fixed, and the particles 3 in the first chamber 11 dissipate energy 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, which is the energy consumption of the particle damper; the impact shell 42 moves freely along the track 7 in the second chamber 12. Since the impact block 41 is fixed in position and the baffle 2 is fixed in position, the impact shell 42 collides with the impact block 41 and / or the baffle 2 to dissipate energy, which is the energy consumption of 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 be moved. 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 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 in the first chamber 11 dissipate energy 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 consumption 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 position of the impact block 41 is fixed, the impact shell 42 and the impact block 41 collide and dissipate energy. This is the energy consumption of the impact damper. The device has increased collision efficiency and good 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 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. At this time, the particle impact composite damper returns to the state where the particles 3 and the impact damper 4 act alone.

[0167] Although the present invention has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

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 divides 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 (4) close to the baffle (2); and an electromagnet (6) arranged on the 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.

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

3. A 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 without a 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 arranged 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. A particle impact composite damper according to claim 5, characterized in that: 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).

7. The particle impact composite damper according to claim 1, characterized in that: 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 and supporting the toothed track (8).

8. The particle impact composite damper according to claim 7, characterized in that: The damper further comprises a vibration sensor for mounting on the building structure and for detecting the vibration effect thereof.

9. The particle impact composite damper according to claim 8, characterized in that: The damper is also equipped with 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 detects no 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 work; 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 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; When the detected vibration signal reaches a maximum 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 for transmission to the controller; when the baffle (2) moves to a set position, the controller controls the electromagnet (6) to cut off 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.

10. The particle impact composite damper according to claim 9, characterized in that: The vibration signal of the building structure is in the form of a sine wave.

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