182 results about "Particle damping" patented technology

An apparatus for reducing noise in an aircraft cabin is disclosed. The apparatus comprises a structure portion and filler material. The structure portion further comprises an internal member having at least one cavity disposed therein. Each of the at least one cavity of the structure portion are filled with the filler material.

The invention relates to a damping and vibration reduction cutter rod. The knife rod includes: a knife handle (2) and a cutter head (1) arranged at the lower end of the knife handle (2), and a cylindrical cavity (4) is coaxially arranged in the knife handle (2). Damping particles (5) are sealed and filled in the cylindrical cavity (4). The present invention has the advantages that: 1) the anti-vibration cutter of the particle damping and vibration-reduction system is used in the vibration-damping cutter bar, which can realize a large length-to-diameter ratio at a relatively low cost, making the processing process simpler and more efficient. high. 2) The vibration-damping tool holder of the present invention can improve the machining precision of the tool and prolong the life of the tool. 3) At the same time, in mechanical processing, the use of vibration-damping tools can improve the quality of surface processing and greatly improve work efficiency, especially in boring tools, using this vibration-damping tool bar to bore and cut deep holes, improve the quality of the inner surface and speed up boring Cutting speed will help a lot.

The invention discloses a mass particle-tuning type round-bottom all-direction quake damper and belongs to the technical field of quake resistance and damping of structural engineering. The mass particle-tuning type round-bottom all-direction quake damper comprises a particle damping box, damping particles, limit springs, vertical isolation springs, a viscous-elastic material, a steel-mixed support, a first spherical steel plate, a second spherical steel plate, wheels and retaining plates. The particle damping box and the damping particles above the wheels in the damper are used for horizontal tuning to damp and dissipate energy. All parts above the vertical isolation springs are used as vertical and swing-direction mass tuning to damp and dissipate energy, and the viscous-elastic material, the lead and steel mixed support and the arc-shaped steel plates form a rotating system which can be used as torsion-direction mass tuning to damp and dissipate energy. Accordingly, damping and energy dissipation can be realized by the damper in all directions. The damper has the advantages of multi-dimensional quake damping, simplicity in manufacturing, convenience and flexibility in arrangement and the like. Under the action of earthquake, the damper can realize energy dissipation and damping in various horizontal, vertical and horizontal torsion directions.

The invention provides a particle damping vibration absorbing device which comprises a spring piece, a particle damping container and a connecting device, wherein damping particles are placed in the particle damping container, and the connecting device is located between the spring piece and the particle damping container. In addition, a perturbator can be additionally arranged on the particle damping vibration absorbing device. The particle damping vibration absorbing device can provide effective vibration control over micro-vibration (vibration acceleration amplitude Aa < 1g, g=9.8m / s<2>) and strong vibration (vibration acceleration amplitude Aa > 1g) of a structure of a mechanical system and overcome the defect that the damping particles can not work in the micro-vibration environment. The particle damping vibration absorbing device with the perturbator additionally arranged is also suitable for controlling vibration in the space weightlessness environment. The particle damping vibration absorbing device is simple in structure, and can be installed inside a main structure or simply hung on the main structure so as to save the space.

The invention relates to a particle damping vibration attenuation design method for umbrella-type vibration of a wheel structure. The design method includes filling scheme design and position scheme design of a damper and totally includes eight steps. In the filling scheme design, based on wheel structure vibration characteristics obtained by finite element analysis, a designed orthogonal experiment scheme is simulated by the aid of a particle damping discrete metaprogram to obtain key impact factors of particle damping, and the best filling scheme of the damper is determined according to change rules of particle damping. In the position scheme design, the best position scheme for mounting the particle damper is determined according to distribution characteristics of umbrella-type vibration response and impact rules of particles with different materials and different particle sizes under the condition of different non-dimensional accelerations gamma on particle damping. Effectiveness of the method is verified by experiments, and the method has a fine practical value and a wide application prospect in the field of application of particle damping to complicated structures.

The invention relates to a damping vibration attenuation gear. The center of the gear is provided with a shaft hole, the circumference of the upper edge of the hub of the gear is provided with a plurality of symmetrical axial hub cavities (2), and damping particles (4) are filled in the hub cavities (2) in a sealing way. The damping vibration attenuation gear is characterized in that the particle damping technology is applied on the vibration attenuation gear. When the gear carries out transmission, the particles in the hub cavities can more sufficiently exert the collision and friction energy dissipation mechanism of the particles under the effects of centrifugal force and the gravity of the particles, and vibration can be effectively attenuated from the two aspects of controlling the vibrating source and controlling the conduction of vibration.

The invention discloses a semi-active electromagnetic particle damping shock absorber for a railway vehicle, and belongs to the technical field of vehicle shock absorption. A certain shock absorption effect is achieved on transverse vibration and longitudinal vibration while vertical shock absorption is provided. The semi-active electromagnetic particle damping shock absorber comprises an upper cover plate type connector, a lower cover plate type connector, a rubber spherical hinge, pin shafts, an external round spring, a shell, shock absorption particles, wear-proof metal separation layers and inductance coils. The shell is divided into an upper groove and a lower groove, the wear-proof metal separation layers are arranged in the upper groove and the lower groove, the shock absorption particles of a certain volume and lubrication oil of a certain amount are arranged in the separation layers, and the inductance coils are arranged in the wear-proof metal separation layers and the grooves. The upper connector is fixedly connected with one end of the shell. The lower connector and the other end of the shell are welded. The rubber spherical hinge and the pin shafts are assembled, and the shock absorber and a bogie are connected together according to standards. Through the damping effect generated by collisions between the particles and collisions between the particles and the wall of the shell, vibration transmission from wheels to a framework is rapidly attenuated, and the good shock absorption effect in different directions is achieved. Meanwhile, the size of an electrification magnetic field can be changed according to changes of a running line, then the damping value of the shock absorber is changed, semiautomatic control over the damping effect is achieved, high reliability and large safety redundancy are achieved, and the semi-active electromagnetic particle damping shock absorber adapts to various severe environments.

A piezoelectric-electromagnetic combined energy gathering vibration damping device is arranged below a floor or a decking, and aims to gather the kinetic energy in the floor or decking and convert same into electric power for storage; the electric power can be released so as to form a damping effect, thus alleviating the floor or decking vibrations; the piezoelectric-electromagnetic combined energy gathering vibration damping device mainly comprises an inductance coil, a permanent magnet, a lithium ion battery, a particle damping container, a multi-grading electromagnetic particle damping, a piezoelectric ceramics, a loading plate, anchoring bolts, an insulation pad, and an electric quantity identification and control induction member; anchoring bolts are reserved on the loading plate and the piezoelectric ceramics; each member is placed in the loading plate according to required positions; the whole device is fixed below the floor or decking through the anchoring bolts. The piezoelectric-electromagnetic combined energy gathering vibration damping device can gather and utilize the energy of vibrations in the environment, and can effectively alleviate the floor or decking vibrations.

The invention discloses an assembly type beam column joint and a construction method thereof. An upper flange of a connecting pair is connected with an upper flange of an H-shaped steel beam through bolts; a lower flange of the connecting pair is connected with a lower flange of the H-shaped steel beam through bolts; holes, which are connected with the bolts, of the upper flange and the lower flange of the connecting pair are slot holes of which the length directions are positioned in the length direction of the H-shaped steel beam; and an end plate of the connecting pair is attached to a concrete column. The construction method comprises the following steps of (1) manufacturing the concrete column; (2) manufacturing the H-shaped steel beam and the connecting pair; (3) mounting a particle damping energy-consuming device; (4) connecting the H-shaped steel beam and the connecting pair; and (5) connecting the column and the beam. When an earthquake comes, the bolts can slide in the slot holes, and earthquake energy can be consumed. Even if the joint deforms greatly, attenuation of strength and rigidity and participation deformation are small, residual deformation of the joint can be reduced after the earthquake, and the assembly type beam column joint has good deformation recovery capability and structure function recoverability.

The invention relates to a piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper. The piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper comprises inductive coils, a permanent magnet, a particle damping container, multi-level electromagnetic particle damping parts, piezoelectric ceramic, an insulating pad, a spring, a viscous damper, a storage battery, a current controller and partition boards (11). The permanent magnet is fixed to one side of the particle damping container, the permanent magnet and the particle damping container are isolated through the insulating pad, the inductive coils are wound around the particle damping container, the container is filled with the multi-level electromagnetic particle damping parts, and the multi-level electromagnetic particle damping parts are separated layer by layer through the partition boards. By means of the piezoelectric and electromagnetic compound energy harvesting type semi-active turned mass particle damper, vibration energy of a building structure can be collected, utilized and consumed through the energy harvesting mode and the tuning and vibration reduction mode, and the purpose of reducing vibration amplitudes of relevant members and structures is achieved.

The invention discloses a particle damping vibration absorption device under the weightless environment. The device comprises damping particles, a power vibration absorption structure and a shell containing the damping particles and the power vibration absorption structure; the power vibration absorption structure comprises two spring-mass block systems and specifically comprises two light cylindrical spiral compression springs and two cylindrical mass blocks; the shell comprises a cylindrical shell with internal threads at the two ends, two screw plugs and two guide rods used for guiding motion of the mass blocks in the power vibration absorption structure; and according to the device, the two mass blocks connected with the vibration system in a different-elasticity manner are utilized for continuously impacting the particles under the weightless environment, and continuous collision, friction and extrusion among the particles are promoted so as to dissipate energy of the vibration system.

The invention discloses a driven type particle damping shock absorber for a railway vehicle, and belongs to the technical field of vehicle shock absorption. The driven type particle damping shock absorber comprises an upper cover plate type connector, a lower cover plate type connector, a rubber spherical hinge, a pin shaft, a circular spring, a shell, shock absorption particles and the like. Column bodies are spliced and welded to form the shell. The shock absorption particles accounting for 50-70% of the size of the shell are arranged in the shell. The upper connector is fixedly connected with one end of the shell through a shock absorption piece. The lower connector is welded to the other end of the shell. The rubber spherical hinge and the pin shaft are assembled. The shock absorber and a bogie are connected together after the requirement that a framework has certain rigidity and displacement relative to an axle box is met. The circular spring has certain rigidity as the elastic element and is pressed between end plates of the upper connector and the lower connector. Vibration energy is consumed through collision and friction between the particles and between the particles and the boundary, and the driven type particle damping shock absorber is simple in structure, is basically not influenced by temperature and is high in reliability.

The invention relates to a composite damping rubber shock-absorbing bearing. It is composed of high-strength fine steel wire mesh, high damping rubber layer, upper sealing plate, fine soft steel rod, multi-graded mixed filling material and lower sealing plate. The multi-graded mixed filling material is mixed with fine particle damping material and fine rubber elastic sphere Composition: The upper end of the thin soft steel rod is fixed on the upper sealing plate and embedded in the multi-graded mixed filler; the high-strength fine-density steel wire mesh and the high-damping rubber layer reserve holes for filling the multi-graded mixed filler. In the damping system described in the present invention, each component can give full play to its own advantages, and realize the organic combination of functions between the components, so that the composite damping rubber shock-absorbing bearing has ultra-high damping performance, so there is no need to configure such as dampers, etc. Other auxiliary shock-absorbing equipment can greatly reduce engineering cost investment and reduce the difficulty of design and construction. The invention has the characteristics of high performance, low carbon and environmental protection, reasonable economy, convenient maintenance and the like, and has broad application prospects.

The invention discloses a built-in particle damping shock absorber type wheel for a railway vehicle, and belongs to the technical field of vehicle shock absorption. The wheel comprises a rigid wheel body, a wear-resistant rubber partition layer, shock absorption particles, a sealing plate and the like. The rigid wheel body adopts an existing wheel structure and is only internally provided with a plurality of grooves and the wear-resistant rubber partition layer, a certain number of shock absorption particles and a small volume of lubricating oil are arranged in the wear-resistant rubber partition layer, and then the rigid wheel body is welded and sealed. The existing wheel structure is fully used, a shock absorber simple in structure is arranged in the wheel while the rigidity and strength of the wheel are ensured, and the wheel has the advantages of being low in cost, good in shock absorption effect, high in reliability and the like.

The invention relates to a particle damping and vibration reduction machine tool. The machine tool includes a machine tool structural part, a cavity (2) is arranged in the machine tool structural part, and damping particles (3) are sealed and filled in the cavity (2). The machine tool structural parts include a machine tool bed (1), a machine tool top beam (4), a machine tool column (5), a machine tool beam and a machine tool reinforcement beam. In the present invention, not only the steel plate welding technology is used to manufacture a large machine tool bed, but compared with the traditional casting processing technology, it has the advantages of relatively simple manufacturing process, short processing and manufacturing cycle, low cost, and saving metal materials; it can also significantly reduce the vibration of the machine tool amplitude, and has the advantages of small changes to the original structure and small additional mass, which not only ensures the machining accuracy of the machine tool, but also saves a lot of metal materials, reduces manufacturing costs, and plays the role of energy saving and emission reduction.

The invention relates to a compound vibration isolating device based on an air spring and a particle damping material. The compound vibration isolating device comprises an air spring component, a particle damping component and a metal spring, wherein the particle damping component comprises a particle holding chamber with throttling holes and particles; the air spring component comprises an air filling hole, a top plate, an air bag layer and a bottom plate; the upper part and the lower part of an elastic component are separately connected with the top plate and the particle holding chamber through welding, or bolts and other technologies; the lower part of the particle holding chamber is connected to the bottom plate through gluing or bolts; and as a result, a whole compound vibration isolating device based on the air spring and the particle damping material is formed. According to the compound vibration isolating device, through changing the particle holding chamber into an additional air chamber, the whole size is greatly reduced than adopting an air spring with an external air chamber; and at the same time, through combining the air spring component, the particle damping component and the metal spring together, the compound vibration isolating device is integrated with the vibration isolating function of the air spring with the air chamber, the energy consuming function of the particles and the vibration isolating function of the metal spring, so that the compound vibration isolating device better buffers the power impact of upper load, consumes vibration energy, reduces noise and has a great vibration isolating effect when excitation frequency is lower than 20Hz.

The invention relates to a wheel disc type particle damping absorber for a rail vehicle. The wheel disc type particle damping absorber comprises disc type shells concentrically arranged on wheels, wherein multiple concentric annular sealing grooves are formed in the disc type shells; and multiple spherical damping particles are filled in the annular sealing grooves. Compared with the prior art, the wheel disc type particle damping absorber fully uses a traditional wheel structure, is provided with the absorber having simple and effective structure on the basis of guaranteeing the wheel rigidity and strength, and has such advantages as low additional mass, low manufacturing cost, good damping effect and high reliability.

The invention discloses a particle damping absorber with wheel and electromagnetic rheological fluid for railway vehicles. The particle damping absorber comprises the rigid wheel, a disc shock absorber, shock-absorbing particles, magnet exciting coils and the like. Two grooves are formed in the inner side and the outer side of a disc shock absorber shell respectively, and the shock-absorbing particles of a certain number and a certain size are installed in the grooves in the inner side and the outer side; the magnet exciting coils are installed in the groove in the inner side; the existing rigid wheel structure is adopted, and the disc shock absorber is fixed to a spoke through bolts. According to the particle damping absorber, the existing wheel structure is fully utilized, on the basis of guaranteeing the rigidity and the strength of the wheel, the effective shock absorber simple in structure is arranged, and the amplitude of damping of the shock absorber can be automatically adjusted according to the vibration condition of the wheel. The particle damping absorber has the advantages that the adjustable range of damping is wide, the excitation utilization rate is high, the energy consumption is small, the shock absorbing effect is good, and the reliability is high.

The invention relates to a pneumatic and particle damping based walking-aiding protection device for old people. The pneumatic and particle damping based walking-aiding protection device comprises an air bag body fit with the rear side of the leg of a human body, wherein the air bag body comprises a haunch support fit with the haunch of the human body, thigh supports fit with the thighs of the human body, shank supports fit with the shanks of the human body and sole supports fit with the soles of the human body, wherein damping particles are filled in the haunch support. The pneumatic and particle damping based walking-aiding protection device for old people can reduce burden of the old people in walking and going upstairs and relieve impact force produced when the old people fall to the ground and the haunch knocks against the ground, accordingly reduce the probability that the pelvic bones are injured and has active aiding and protecting roles on the old people in walking and going upstairs.

The invention discloses a steel rail damper. The damper includes at least one cavity structure; the cavity structures are provided with fillers; and the fillers can be fluidly arranged in the cavity structures. The damper can be commonly formed by the cavity structures and discrete particles, so that the damper can absorb the vibration of a steel rail through a principle of a dynamic vibration absorber and also can absorb the vibration of the steel rail through a principle of particle damping; and with the existence of particle damping, the vibration absorption efficiency and vibration absorption bandwidth of the damper can be enhanced, and better vibration absorption effects can be generated.

A toolholder includes a cutting tool mounted to a head attached to a collar at a first end of the toolholder. A shank is located at a second, opposite end of the toolholder. A central cavity extends inwardly from the first end toward the shank. A passive vibration absorber assembly is disposed within the central cavity. The passive vibration absorber assembly includes an absorber body and an absorber cap attached to the absorber body. The absorber body has a first end, a second end opposite the first end, and one or more cavities formed in the second end. The one or more cavities of the absorber body are partially of wholly filled with metal or ceramic particles or powders to provide particle damping for suppressing vibration of the toolholder.

A plate for a braking system of a motor vehicle includes a back plate, a friction layer and a particle damping device.

The invention discloses a coupled electromagnetic field particle damper with a ferromagnetic end cover additionally arranged at one end and a vibration reduction method of the particle damper for a vibration structure. The coupled electromagnetic field particle damper comprises a non-ferromagnetic cavity with openings in two ends, the ferromagnetic end cover is installed at one end of the non-ferromagnetic cavity, a non-ferromagnetic end cover is installed at the other end of the non-ferromagnetic cavity, the ferromagnetic end cover and the non-ferromagnetic end cover seal the non-ferromagnetic cavity, ferromagnetic particles are arranged in the non-ferromagnetic cavity, and the outer side of the non-ferromagnetic cavity is wound with a coil. When the particle damper is powered on, an electromagnetic field generated by a spiral pipe will magnetize the ferromagnetic particles and the ferromagnetic end cover, the ferromagnetic particles interacts with the electromagnetic field after being magnetized to increase the relative movement between the particles, and the purpose of increasing energy consumption is achieved; in the space weightlessness environment, the ferromagnetic end cover can apply whole one-way force on all the ferromagnetic particles, positive pressure between the particles is increased, and therefore the probability of collision between the particles and friction energy consumption are increased, and the vibration reduction function of particle damping is improved; under the condition of large inertia force, a good vibration reduction effect is also achieved.

The invention discloses a compound adjustable transmission system twisting damping device with particle damping and electromagnetic damping. The device comprises a first mass flywheel, a second mass flywheel, an electromagnetic adjustable damper and particle dampers, wherein a rotor of the electromagnetic adjustable damper is detachably fixed between the first mass flywheel and a stator end cover;the particle dampers are uniformly distributed in the peripheral direction of the outer side of the second mass flywheel; the particle dampers comprise shells, damping particles and cover plates; andthe damping particles are filled in cavities formed by the shells and the cover plates. The device is simple in structure, novel and reasonable in design, convenient to realize, low in cost and highin working stability under bad environments, can greatly reduce the transmission system twisting vibration, improves the transmission system working performance, lowers the transmission noise, and ishigh in practicability and convenient to popularize and apply.

The invention relates to an urban rail vehicle wheel composite damping vibration attenuation noise reduction device. The device comprises two noise reduction assemblies which are concentric with a wheel spoke plate. The two noise reduction assemblies are respectively arranged on two sides of the wheel spoke plate. Each noise reduction assembly comprises an annular particle damping mechanism, an elastic damping layer, and a packing medium layer. The packing medium layer is abutted against the wheel spoke plate. The elastic damping layer is between the particle damping mechanism and the packing medium layer. The particle damping mechanism is formed by a particle damping container and a particle damping material in the particle damping container. The device has double vibration and noise reduction function of a dynamic absorbing damper and a particle damper. The device is advantaged by wide application range, less modification on the original structure of a wheel, low added mass, wide acting bandwidth, obvious vibration reduction effect, and especially good inhibition effect on wheel vibration noise with high-frequency characteristic.

The invention discloses an RV reducer based on a particle damping shell. The RV reducer comprises the shell and a cycloidal gear. Holes are punched in the upper portion and the lower portion of the edge of the shell, abrasion-resistant rubber interlayers are embedded, a certain quantity of damping particles are packed in the interlayers, and then the two ends are sealed. According to the RV reducer, a damping effect is achieved through collision between the damping particles on the edge of the shell as well as between the damping particles and the inner wall of the shell, and vibration caused by sudden stopping and sudden starting in the working process of the RV reducer is attenuated in time. The RV reducer is reasonable in structure, good in damping effect, and capable of prolonging the service life of main parts and components, and the transmission stability and accuracy of the RV reducer are improved.

The invention aims to provide a track board vibration-guiding vibration-isolating vibration absorber based on particle damping and a phononic crystal. The track board vibration-guiding vibration-isolating vibration absorber comprises a sound insulating plate, a sound guide plate, a vibration absorbing box, and a localized phononic crystal scatterer. The sound insulating plate and the sound guide plate are assembled together by a matrix and a 'point defect' localized phononic crystal vibration absorbing component through periodic uniform distribution. The vibration absorbing box is a dual-particle damping vibration absorber, and fixed on the sound guide plate through a spring. The track board vibration-guiding vibration-isolating vibration absorber is simple in whole structure, convenient to manufacture, has the good vibration and noise reduction effects to wheel track vibration and noise caused by an uneven rail track, lower requirements to a working environment, and can be used for reducing the noise generated by wheels of a high-speed train, improving noise and vibration performance of the high-speed train wheels, reducing the effect to the surrounding environment, and improvingthe working environment of workers and the like.

The invention relates to application of particle damping in large-scale precision equipment. A support frame based on a particle damping technology is provided. The support frame based on the particle damping technology comprises a top, a bottom, a particle damping cavity and particle damping; the particle damping cavity comprises multiple branch cavities, the bottom layer of each branch cavity is smooth, and the side wall and the top layer of each branch cavity are each of a coarse structure; the material of the particle damping comprises one or more of iron, lead particles, barite, aluminum, rubber coating particles, magnesian inorganic particles, glass particles, tungsten alloy particles and IPN composites. According to the support frame, when the large-scale precision equipment produces noise or vibration, the vibration energy can be absorbed and consumed through vibration in the damping cavity. Meanwhile, the support frame based on the particle damping technology is simple in structure, low in cost, convenient to implement and worthy of promotion.

The invention relates to an inerter-based particle damper, comprising fixing plate (3) fixed on a ground, and an inerter unit and a particle damping unit slidably arranged on the bottom; the inerter unit is connected with the particle damping unit through connection spring (7); the fixing plate (3) is connected with the inerter unit through gear unit (2) and drives the inerter unit to move. Compared with the prior art, the inerter-based particle damper with various energy-dissipating aseismic measures has good energy-dissipating capacity and applicability.

The invention discloses a balance block used for a washing machine and the washing machine provided therewith. Multiple cavities are formed in the balance block. Multiple damping particles are arranged in each cavity. According to the balance block used for the washing machine, damping and vibration reduction effect of particle damping technology can be fully utilized by arranging the multiple cavities having damping particles in the balance block. Therefore, vibration energy during an overall dehydration process of the washing machine is effectively consumed so that amplitude of the washing machine is reduced and the vibration noise problem of the washing machine is improved. In addition, particle damping technology is adopted with little changes in a conventional balance block, the damping ratio of a structure is effectively improved with no additional quality generated. The effect of vibration reduction and noise reduction is achieved.