332results about "Friction dampers" patented technology

The present invention belongs to the technical field of wind-induced vibration control of bridges, and provides a one-way friction energy dissipation device for controlling the flutter of large-span bridges. The device is quickly installed before the arrival of extremely strong winds, which can temporarily and significantly improve the flutter safety of the bridge, reduce its own wind-resistant design requirements, and significantly reduce the project cost. After the strong wind, it can be easily disassembled without affecting the beauty of the bridge or interfering with navigation under the bridge. The use of one-way bearings greatly reduces the weight, transportation, loading and unloading, and storage costs of the counterweight. The device can adapt to any static wind displacement, has good robustness, is safe and reliable, economical, fast, efficient and practical, and can be shared by multiple bridges at different times, greatly reducing its own and storage costs. The device can also be used for long-term vibration control of large marine structures such as floating offshore platforms, floating wind turbines, and temporarily docked ships under the combined action of wind and waves, and wind vibration control of gentle photovoltaic structures.

The invention is suitable for the technical field of shock insulation equipment, and provides a composite buffer type shock absorber which comprises an upper fixing seat, a lower fixing seat, an elastic shock insulation unit and a plurality of transverse limiting buffers, the elastic shock insulation unit is arranged between the upper fixing seat and the lower fixing seat, the two ends of the elastic shock insulation unit abut against the friction faces of the fixing seats through sliding friction blocks, and the transverse shock absorption function is provided through sliding friction energy consumption. The four transverse limiting buffers which are arranged in an annular array mode are connected with the upper fixing base and the lower fixing base, the transverse reset capacity is enhanced and the displacement amount is limited through the elastic stretching and retracting of buffer springs and the synergistic effect of damping liquid, and the friction blocks are prevented from being disengaged; the multi-directional vibration reduction performance is further optimized, the vertical vibration isolation function and the transverse limiting function are achieved, and the problem that due to too large transverse deviation of a traditional vibration reducer, an elastic unit is torn is effectively solved.

A composite damping device for vibration reduction of a tower drum and blades of an offshore wind turbine belongs to the technical field of vibration reduction of wind driven generators, and is characterized by comprising a blade integration unit and a tower drum tuning unit, the blade integration unit adopts a cylindrical particle damping cavity, the center of the cylinder is connected with a mass ball through a spring, and the cavity is filled with damping particles; the steel wire rope is fixed in the blade to restrain vibration displacement; the tower tube tuning unit is connected with the mass block through a steel wire rope, the mass block is circumferentially provided with the springs and connected with the tower tube wall, the lower portion of the mass block is connected with the mass ball, and the upper periphery and the lower periphery of the mass block are connected with the tower wall through the hydraulic inerter dampers. And the working space is obviously reduced, the multi-direction vibration control capability is improved, and the method is suitable for vibration control of offshore wind turbine towers and blades.

To provide an impact absorption device that can be reused by reverting a holder after use, and that is less likely to generate a repulsive force because impact is absorbed by a friction force generated at the time of press fitting of a columnar member.SOLUTION: An impact absorption device includes: a plate-shaped holder 3 which is detachably assembled to a frame body 2; and a columnar member 4 provided on the holder 3. The holder 3 has a through hole 3a open thereon. Both of one face and the other face of the holder 3 can be assembled to the frame body 2. With one end part 41 side of the columnar member 4 being disposed in the through hole 3a and the other end part 42 side of the columnar member 4 extending to an opposite side of the frame body 2, when an external force toward the one end part 41 side is applied to the other end part 42 side of the columnar member 4, the one end part 41 of the columnar member 4 is displaced toward the side of the frame body 2 and a middle part of the columnar member 4 is press-fitted into the through hole 3a.SELECTED DRAWING: Figure 1

A damping shock absorber includes a pipe and a plurality of shock absorbers configured on the pipe. The shock absorber includes a main body sleeved on the outer periphery of the pipe and a damping medium filled in the main body. The main body is provided with an inner cavity, and the inner cavity is divided into a plurality of chambers for placing the damping medium separately. A method for designing the damping shock absorber, wherein the main body is filled with the damping medium, such that the shock of the pipe or a shaft body is reduced, ensuring the smooth operation of the pipe or the shaft body, and further ensuring the safety and efficiency of the pipe or the shaft body in a working process. The damage to the pipe or the shaft body and the shock interference to other linked apparatuses are greatly avoided.

The invention discloses a swing check valve, and particularly relates to the technical field of valves, the swing check valve comprises a valve body, a valve cover, a support piece, a bolt shaft, a rocker, a valve clack and a limiting block, and further comprises a damping assembly. Through the arrangement of the damping assembly, a driving plate can be pushed to drive a second piston to extrude gas in a driving cavity into two driven cavities while a valve clack is opened, so that two second mounting plates drive corresponding friction blocks to move in the direction of a corresponding first mounting plate; the friction block can be in contact with the first friction plate or the second friction plate to generate a rotary damping effect, the valve clack cannot directly overcome friction force to deflect under the condition of large-flow pulsating flow, repeated oscillation of the valve clack is avoided, the service life of the valve is prolonged, the closing speed of the valve clack can be slowed down under the condition of small-flow pulsating flow, and the service life of the valve is prolonged. Damage caused by quick closing of the sealing face of the valve clack is avoided, and the service life of the valve is further prolonged.

The invention discloses a multi-pendulum-type particle tuned damper and a vibration reduction method thereof. The problems that a traditional tuned mass damper (TMD) is poor in robustness, narrow in vibration reduction frequency band and difficult to adapt to the complex and changeable vibration environment of an offshore wind power tower drum are solved. According to the damper, the supporting plate is hung through the flexible traction component to form a pendulum type tuned mass unit, the N-order inherent frequency of the pendulum type tuned mass unit is tuned to be matched with the N-order inherent frequency of a tower barrel, and efficient resonance energy absorption of main frequency vibration is achieved; meanwhile, the particle filling box is arranged on the supporting plate, the swinging type unit swings to drive particle materials to generate violent relative movement, and broadband vibration energy is widely dissipated through inelastic collision and friction. According to the application, the adaptability, the robustness and the overall vibration reduction efficiency of the damper in a severe marine environment can be remarkably improved.

An apparatus is provided. The apparatus includes an equipment support structure configured to support a semiconductor fabrication component. The apparatus includes a damper assembly configured to resist a lateral force induced by a seismic event to the equipment support structure. The damper assembly includes a gear rack coupled to the equipment support structure. The damper assembly includes a first flywheel assembly including a first mass damper flywheel and a first gear meshed with the gear rack and selectively engaged with the first mass damper flywheel.

The invention discloses a horizontal floating raft vibration isolation device, and belongs to the technical field of floating raft vibration isolation. The first vibration isolation assembly is detachably connected to the two sides of the lower end of the buoyant raft body through the fixing assembly, the first vibration isolation assembly is movably provided with a plurality of steel wire rope rings, and the first vibration isolation assembly isolates vibration through the steel wire rope rings; the second vibration isolation assembly comprises a plurality of anechoic tiles, the multiple anechoic tiles are glued to the upper end of the buoyant raft body, and multiple cavities are formed in the bottom faces of the multiple anechoic tiles; the third vibration isolation assembly is fixedly connected into the lower end of the buoyant raft body; the bottom of the first vibration isolation assembly and the bottom of the third vibration isolation assembly are both fixedly connected with the base. Multiple vibration isolation modes such as steel wire rope ring vibration isolation and anechoic tile vibration isolation are adopted for vibration isolation, and the vibration isolation effect is enhanced.

The present invention relates to a flexible energy-absorbing structure based on the interactive motion of a group of magnetic elements. The structure comprises a magnetic particle element structure and an external flexible wrapping membrane. The magnetic particle element structure comprises multiple magnetic particle elements, which are filled within the external flexible wrapping membrane, which is sealed using a hot melt method. Compared with existing technologies, the present invention offers advantages such as lightweight, high impact resistance, extensive design and performance control options, strong environmental adaptability, and excellent self-repair capabilities. It is widely applicable to applications such as aircraft impact-resistant structures and vibration-damping protective structures.

The present invention provides one or more carrier devices capable of varying contact damping with pressured displacement. The device is configured to be installed on mechanical force-receiving structures that have rolling wheels, rolling balls or slidably displaceable terminal block structure, carrying devices and transportation devices for humans or objects. When receiving pressure smaller than a set value, the device provides low contact damping and is thus easy to move. On the other hand, when receiving pressure greater than the set value, it provides high contact damping so as to prevent slip and thereby ensure safe placement. In addition, when receiving pressure smaller than the set value, the device has its pre-stressed structure generate modulation to displacement corresponding to the size of the pressure it receives for the purpose of shock absorbency.

A power wheelchair includes a frame, a powertrain including a motor, gearbox, and powertrain suspension coupled to a drive wheel. The powertrain suspension includes a powertrain mount connected to the motor. The mount is pivotally connected to and resiliently supported by an upper link and a lower link for movement of the drive wheel relative to the frame. The power wheelchair further includes a base suspension connected between the frame and the caster support arms. The base suspension is dynamically controllable to vary caster suspension movements in response to sensor outputs to reduce pitching motions.

The application discloses a kind of discontinuous friction damper and its use method, belong to friction damper technical field, including damper pull rod, pull rod groove, limit hole, damper shell, damper cover, pin hole, connecting piece, fixed bolt, compression bolt, disc spring, guide bolt, pressure block, friction block, friction damper provided by the application can withstand large stroke and large tonnage, when tower crane faces sudden unloading working condition, damper initial operation provides damping force, buffer arm frame upwarp impact force, cancel damping force after a certain stroke, facilitate arm frame upwarp fast drop balance arm tail balance weight, after balance weight drop is completed, friction damper provides damping force, for arm frame continues to overturn under the action of inertia force provides certain resistance, to reduce arm frame upwarp displacement, prevent arm frame under the action of inertia force overturn from thereby causing arm frame drop dangerous.

The invention provides a friction damper which comprises a cuboid-shaped shell, a friction plate and a friction plate. The plane friction plate is arranged in the shell, an actuating rod and a limiting rod extend out of the end faces of the two sides, in the length direction of the shell, of the plane friction plate, at least one driver sleeve is arranged on the plane friction plate, and the driver sleeves vertically face the cover plate; the limiting plate is arranged on the inner wall of the bottom of the shell, and the limiting rod penetrates through the limiting plate; the resetting device comprises a first resetting device and a second resetting device, the limiting rod is sleeved with the first resetting device, and the actuating rod is sleeved with the second resetting device; the at least one piezoelectric ceramic driver is arranged on the plane friction plate, the axial direction of the piezoelectric ceramic driver is perpendicular to the inner wall of the bottom of the shell, a sliding mechanism is arranged at the top end of the piezoelectric ceramic driver, and the sliding mechanism is in sliding contact with the inner wall of the cover plate; and the connecting rod is fixedly arranged on the outer surface of the shell. The friction damper provided by the invention has a variable damping function.

The invention discloses a particle damping vibration absorption device applied to an airborne display module, which is characterized in that a particle damping vibration absorber unit is arranged on an airborne display unit, and the airborne display unit comprises a structural component, a liquid crystal screen component, an optical component, a circuit component and a backlight component, the structure assembly, the liquid crystal screen assembly, the optical assembly, the backlight assembly and the circuit assembly are arranged in sequence, and the man-machine interaction function can be achieved. According to the scheme, the particle damping vibration absorption device is simple in structure, particle damping vibration absorption is achieved by arranging the particle damping vibration absorber unit at the vibration response peak point on the airborne display unit, effective vibration absorption in the airborne severe environment is achieved through cooperation of an elastic element, damping particles and a damping pad in the particle damping vibration absorber unit, and the particle damping vibration absorption device is simple in structural form and convenient to use. The device has the characteristics of high reliability, simplicity and convenience in operation, easiness in maintenance, capability of meeting normal use in an airborne severe environment and the like, and can effectively reduce the vibration response peak value on the liquid crystal display screen.

The present invention relates to the field of damper technology, and specifically provides a tuned particle damper, comprising: a first mounting portion, a second mounting portion, a spiral mechanism, and a tuned particle rotating portion, wherein the first mounting portion is slidably connected to the second mounting portion; the spiral mechanism is disposed within the second mounting portion and is used to convert linear sliding between the first mounting portion and the second mounting portion into rotational motion and output it; the tuned particle rotating portion is rotatably mounted within the first mounting portion, and the output end of the spiral mechanism is connected to the tuned particle rotating portion to provide rotational force to the tuned particle rotating portion. The present invention effectively solves the problem of the prior art that tuned mass dampers require a large mass ratio, achieving the goal of achieving a good shock absorption effect using a tuned mass damper with a smaller mass ratio.

The invention involves a triangular prismatic tuned mass damper suitable for large-span or cantilever structures, including a triangular prism box, particle damping units inside the triangular prism box, and a steel mass block. Below the triangular prism box are high-damping springs. The particle damping unit consists of a particle damping cavity, particles of three different sizes, and foam rubber pads. When the structural vibration amplitude is small, the particles dissipate energy by compressing the foam rubber pads and rolling. When the amplitude of structural vibration is large, the energy is dissipated by the collision of particles and the compression of the foam rubber.

A friction damper that is disposed between a pair of members which move relative to one another in a prescribed direction and suppresses said relative movement by means of frictional force between pressure contact plates that slide in conjunction with the relative movement, said friction damper comprising a first pressure contact plate integrally provided to one member among the pair of members, a second pressure contact plate integrally provided to the other member among the pair of members, and a fastening member that is inserted into a through hole in the first pressure contact plate and a through hole in the second pressure contact plate to press the first pressure contact and the second pressure contact into contact in the plate thickness direction, wherein: one through hole among the through hole in the first pressure contact plate and the through hole in the second pressure contact plate is an elongated hole that is elongated in the prescribed direction; the other through hole among the through hole in the first pressure contact plate and the through hole in the second pressure contact plate is a bolt hole; the fastening member has a bolt that is inserted through the elongated hole and the bolt hole, a nut that is threaded onto the bolt, and a pipe that accommodates the bolt and is accommodated in the elongated hole and the bolt hole; and when the friction damper is subjected to an axial force in the prescribed direction, the pipe contacts the short-diameter portion of the elongated hole to suppress buckling in an intersecting direction intersecting the prescribed direction and the plate-thickness direction.

The invention provides a foam structure, a display module and a display device, the foam structure comprises a plurality of foaming particles, the plurality of foaming particles comprise a first type of foaming particles and a second type of foaming particles, and in at least one direction, the particle size of the first type of foaming particles is larger than that of the second type of foaming particles; wherein at least part of the second type of foaming particles are wrapped by the first type of foaming particles, and / or at least part of the second type of foaming particles are located in gaps between every two adjacent first type of foaming particles. By increasing the volume of the first type of foaming particles and / or increasing the density of the foaming particles in the foam structure, the gap filling rate of the foaming particles in the foam structure can be increased, so that the strength of the foam structure is improved, and the external force extrusion resistance and the external force impact resistance of the foam structure are improved.

To provide a displacement-dependent damper which can be installed on a seismic isolation layer irrespective of the form of a seismic isolation bearing.SOLUTION: A displacement dependent damper includes: a lower shoe 2 which has a V-shaped recessed lower slide-contact face 23 on an upper face in an X-direction (a first direction), and which is fixed to an upper part of a lower structure 14 of a construction; an upper shoe 3 which has a V-shaped recessed upper slide-contact face 33 on a lower face in a Y-direction (a second direction) being orthogonal to the X-direction on a horizontal face, and which is fixed to a lower part of an upper structure 15 of the construction; a slider 4 having a lower slide-contact face which can slide with respect to the lower slide-contact face 23 in the X-direction and an upper slide-contact face 46 which can slide with respect to the upper slide-contact face in the second direction; and a compression spring 51 (an elastic member) which is disposed between the upper shoe 3 and the upper structure 15, and is elastically deformable in a vertical direction.SELECTED DRAWING: Figure 3

To provide a shock absorber capable of improving ride comfort on a vehicle by changing friction force according to the vibration states of a vehicle body.SOLUTION: A shock absorber D includes a shaft 1 rotatable in the peripheral direction, a first friction disc 2 fixed to the shaft 1, a second friction disc 3 for generating friction force between the first friction disc 2 and itself to suppress the rotation of the shaft 1, a third friction disc 4 for generating friction force between the first friction disc 2 and itself to suppress the rotation of the shaft 1, a first opposite member 5 non-rotatable in the peripheral direction and arranged on the counter first friction disc side of the second friction disc 3 in the axial direction, a second opposite member 6 non-rotatable in the peripheral direction and arranged on the counter first friction disc side of the third friction disc 4 in the axial direction, a first elastic body 7 connected to the first opposite member 5 and the second friction disc 3, and a second elastic body 8 connected to the second opposite member 6 and the third friction disc 4.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of noise reduction nails, in particular to a hollow shock absorption and noise reduction nail structure. The hollow shock absorption and noise reduction nail structure comprises a nail body, an inner cavity is formed in the nail body, and a nail cap is installed at the tail of the nail body in a sliding connection mode. An inner cavity formed in the nail body is filled with metal sand and is provided with a steel ball, and the metal sand is distributed in the inner cavity on the two sides of the steel ball; a protruding part is arranged at the tail of the nail body, and a plurality of outwards-inclined inserting cavities distributed in an annular mode are formed in the protruding part. A plurality of annularly-distributed inserting pieces are fixedly embedded in the inner wall of the nail cap. According to the hollow shock-absorbing and noise-reducing nail structure, the nail cap is knocked by a hammer, so that the inserting column slides along the inner cavity and tightly compresses the metal sand, and the metal sand can be plastically deformed to absorb vibration energy, so that the metal sand on the two sides of the steel ball can be deformed and the impact amplitude on the steel ball is reduced; therefore, internal stress generated when the nail body is impacted is effectively reduced, and the effect of reducing noise generated when the nail body is knocked by a hammer is achieved.

A vehicle, comprising an electric damping device. The electric damping device comprises a first lead screw assembly, a second lead screw assembly, a first electric motor assembly and a second electric motor assembly. The first lead screw assembly is connected to the second lead screw assembly. The first electric motor assembly is in limiting fit with the first lead screw assembly, and the second electric motor assembly is in limiting fit with the second lead screw assembly.

The present invention discloses a non-local particle damping rotating superstructure wide low-frequency vibration reduction device, comprising a mechanical superstructure and an external cavity; the mechanical superstructure is composed of a plurality of unit cell structures periodically arranged in an XY plane, and the unit cell structure is composed of a non-local connection structure, a matrix damping structure, a connection damping structure and a rod; the matrix damping structure is composed of a particle damping group, a baffle, a partition and a matrix damping cavity; the connection damping structure is composed of a particle damping group, a baffle, a partition and a connection damping cavity; the non-local connection structure is composed of a particle damping group, a partition, a baffle and a non-local cavity; a plurality of layers of particle damping groups are arranged in the matrix damping cavity, the connection damping cavity and the non-local cavity, partitions are provided between each layer of particle damping groups, and baffles are detachably installed in each cavity; the external cavity and the mechanical superstructure are connected to each other by a rotating connection rod, and the bottom of the non-local connection structure in the mechanical superstructure is in a suspended state.

The invention relates to a vibration and noise reduction assembly, a driving assembly and a vehicle, and relates to the technical field of vehicles, the vibration and noise reduction assembly is used for solving the problem of how to improve the vibration and noise reduction effect of the driving assembly, the vibration and noise reduction assembly comprises a supporting piece and damping particles, the supporting piece comprises an acoustic black hole part, and the acoustic black hole part is used for absorbing and attenuating vibration energy; the supporting piece is also provided with an accommodating cavity which is arranged at an interval with the acoustic black hole part; the damping particles are arranged in the containing cavity and used for dissipating vibration energy. The vibration and noise reduction assembly is used for reducing vibration and noise of the driving assembly.

The utility model relates to the technical field of medical instruments, in particular to a guide wire inserter with damping. The guide wire inserter with the damping function comprises a guide wire inserter body and a damping block, a conical guide wire channel opening is formed in the guide wire inserter body, a tip opening is formed in the left side of the guide wire inserter body, and a tail end opening is formed in the right side of the guide wire inserter body. The guide wire channel opening is communicated with the tip opening and the tail end opening of the guide wire inserter body, a damping block is integrally formed in the position, close to the tail end opening, in the guide wire inserter body in an inclined mode, and a connecting opening is formed by the inclined upwarp position of the damping block and the guide wire inserter body. According to the guide wire inserter, the damping block is arranged at the position, close to the tail end opening, of the guide wire channel opening, and when the guide wire exits from the tip opening of the guide wire inserter body, the damping block can automatically clamp the guide wire and generate certain resistance to the guide wire, so that the guide wire is prevented from falling off, and the stability and safety in the guide wire insertion process are effectively improved.

The application provides a salt mist corrosion resistant damper, which comprises a particle damper and a pad damper; the particle damper comprises a particle damper shell; an upper cover is arranged on the upper end of the particle damper shell; damping particles are arranged in the particle damper shell; the particle damper shell is fixed with a gas turbine generator set and various types of driving device chassis; the particle damper shell is connected with one end of a positioning screw rod, the positioning screw rod passes through an upper metal mesh pad and is connected with the pad damper; the positioning screw rod is sequentially connected with a base after passing through an intermediate shell, an outer ring metal mesh pad and an inner ring metal mesh pad in the pad damper; a transverse mesh pad is arranged between the intermediate shell and the base. The application can not only well consume the vibration energy of the full frequency band of the gas turbine generator set and various types of driving device on the offshore platform or land, but also can work stably for a long time in the high and low temperature and high salt mist environment.

This invention relates to a kind of displacement amplification self-centering friction damper. The device uses gears to convert the axial deformation into the rotation of the friction-disc, and the friction device engages in friction at the edge of the friction-disc, then the displacement can be amplified and therefore it can reduce the frictional force and prolong the service life of friction components. At the same time, through gear transmission, the friction force provided by the friction device can increase with the increase of relative displacement, then it can provide suitable energy dissipation capability under different working conditions. Additionally, the device can automatically return to its initial state by disc-spring, and also provides self-centering capability for the structure simultaneously, advantageous in reducing residual deformation of the structure under severe earthquake. Compared with existing technologies, this invention has a better energy dissipation effect and is suitable for vibration control in engineering structures.

This invention relates to a hydraulic amplification device based on a semi-circular friction damper, belonging to the field of vibration control technology. It includes a large pull plate, a damper connector, a semi-circular friction damper, a rack and pinion connector, a fisheye ball joint, a short pin, a long pin, a reversing lever, a piston rod, an upper barrel fixing component, an upper barrel receiving component, an upper barrel, a side plate, a lower plate, a guide tube, a reaction frame cover plate, a reaction frame vertical plate, a lower barrel, a base support, a pressure plate, a friction plate, a threaded cover, a rectangular brake pad, a fluororubber sheet, a piston head, a piston, and hydraulic oil. When the amplification device is under load, the semi-circular friction damper has no output force, the reversing lever and the hydraulic amplification part do not function, and the friction plate dissipates energy under its own weight. When the amplification device is under unload, the semi-circular friction damper generates damping force. This damping force is amplified once by the reversing lever and then amplified a second time by the hydraulic pressure in the upper and lower barrels, transforming into normal pressure at the friction plate, which, combined with the movement of the friction plate, generates frictional force.