305results about "Inertia effect dampers" patented technology

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

According to the present invention there is provided an active vibration control system comprising: an electromagnetic actuator and a control element, the electromagnetic actuator being operable to apply a force on a base structure to which the active vibration control system is attachable such that vibrations of the base structure are actively controllable by the application of said force, wherein the electromagnetic actuator and control element are relatively moveable such that the active vibration control system has at least two modes of vibration, and wherein movement of the electromagnetic actuator causes movement of at least a part of the control element.

The utility model provides a local resonance type phononic crystal primitive cell which comprises a silicon rubber base body serving as an outer ring, a steel scatterer is arranged in an inner cavity of the silicon rubber base body, and the steel scatterer and the silicon rubber base body are connected and fixed through a soft material wrapping layer. The four spring mass subsystems are nested in the steel scattering body; a soft material wrapping layer is arranged on the side wall of the inner cavity of the silicone rubber base body. According to the utility model, a plurality of complete and directional band gaps in a low-frequency range can be effectively formed, and low-frequency elastic waves are effectively inhibited; the hollow and height difference design is adopted among the external silicon rubber base body, the steel scatterer and the spring mass subsystem, so that the vibration damping material has a sufficient deformation space to play a vibration damping role; the steel scatterer, the spring mass subsystem and other structures ensure that the anti-vibration pad has an enough supporting effect, band gap regulation and control of the local resonance type photonic crystal can be effectively achieved through material selection flexibility, and low-frequency vibration control of different frequency bands is achieved.

A vibration absorber arrangement (1) is provided, in particular for tall slender structures, comprising a supporting structure (8), an absorber mass (2) which comprises a center of mass (3), and at least one wheel (4, 5) by means of which the absorber mass (2) is movable on a concavely curved rail arrangement (6), which is connected to the supporting structure (8), from a stable central position in two opposite directions, wherein a friction damper device (9) is provided. One wants to be able to adapt such a vibration absorber arrangement in a simple manner to different operating requirements. For this, it is provided that the friction damper device (9) is adjustable between a first state, in which it does not interact with the absorber mass (2) or only dampeningly, and a second state, in which it controlledly brings a movement of the absorber mass (2) to a standstill.

The invention discloses a sleeve-shaped tuned mass damper mounting method based on parameter design calculation. The sleeve-shaped tuned mass damper mounting method comprises the following steps that S1, parameters of a single-column wind turbine platform and a whole machine structure are calculated; s2, calculating parameters of the sleeve-shaped tuned mass damper according to the structural parameters of the wind turbine; s3, the sleeve-shaped tuned mass damper is installed on the single-column type wind turbine platform; in the step S2, a kinetic equation is established through a kinetic analysis model, the optimal damping coefficient cd and the distance d of the translational and rotational freedom degrees are solved, and the step S2 comprises the substeps that S21, the single-column wind turbine platform and the sleeve-shaped tuned mass damper are simplified into equivalent four-freedom-degree models; s22, assuming that external excitation is a simple harmonic load, and deducing translation response and rotation response of the sleeve-shaped mass body and the single-column type wind turbine platform; s23, determining a damping tuning parameter and a frequency tuning parameter; s24, solving an optimal damping coefficient copt by a simultaneous equation in combination with a branch resonance point condition; and S25, calculating the distance d according to the rotation radius ratio rho.

The invention relates to a self-adaptive tuning inerter damping device and method for suppressing vertical micro-vibration of a structure. The self-adaptive tuning inerter damping device comprises a bearing base, a tuning mass block, a vibration system connecting the bearing base and the tuning mass block, a pneumatic control system and an intelligent measurement and control system. The vibration system is formed by connecting an outer side air spring set and a central air spring in series with a hydraulic inerter unit, an adjustable damping branch and a fixed inerter branch which are connected in parallel are integrated in the hydraulic unit and are respectively provided with an electro-hydraulic proportional valve and a spiral pipe type hydraulic inerter, so that adjustable damping and mass amplification are realized. The pneumatic system adjusts the air pressure of each air spring through an independent air path and a proportional valve so as to change the rigidity. An intelligent system monitors vibration through a sensor, a central controller identifies excitation frequency and optimizes parameters based on a kinetic model, and rigidity and damping are synchronously adjusted. According to the invention, the problem that a mechanical inerter is insufficient in response to micro-vibration is solved, the defects that a traditional passive device is narrow in frequency band and easy to detune are overcome, and broadband, self-adaptive and high-performance suppression of vertical micro-vibration of a structure is realized.

The invention discloses a quasi-zero stiffness electromagnetic-spring-rubber composite vibration isolator with a wide vibration isolation frequency band. The quasi-zero stiffness electromagnetic-spring-rubber composite vibration isolator comprises a vibration isolator shell. The electromagnetic structure core is installed in the vibration isolator shell and comprises a first coil, an annular permanent magnet, a third coil and a second coil which are sequentially arranged from top to bottom, the current direction of the first coil is the same as that of the second coil, and the current direction of the third coil is opposite to that of the second coil; the rubber-spring composite vibration isolation platform is mounted in the vibration isolator shell, and the rubber-spring composite vibration isolation platform is mounted in the vibration isolator shell; high linear positive stiffness provided for the rubber-spring composite vibration isolation platform through an electromagnetic structure core is combined with linear negative stiffness provided for the rubber-spring composite vibration isolation platform, a quasi-zero-stiffness platform with small stiffness and large range is achieved, low-frequency vibration with large amplitude can be isolated, the rubber vibration isolation platform is combined, and the vibration isolation performance of the rubber-spring composite vibration isolation platform is improved. And vibration isolation of a wide vibration isolation frequency band is realized.

The invention belongs to the technical field of vibration isolation, and particularly relates to a quasi-zero stiffness metamaterial sandwich structure, a vibration isolation device and a manufacturing method. The quasi-zero stiffness metamaterial sandwich structure is formed by periodically arranging unit cells in the horizontal direction, and each unit cell comprises an upper panel, a lower panel, a QZS resonator core body and a vertical supporting column; the QZS resonator core comprises a central mass block, QZS resonator units are arranged on the upper portion and the lower portion of the central mass block in a mirroring mode, each QZS resonator unit is composed of two quasi-zero-stiffness unit cells which are arranged in a crossed mode, and each quasi-zero-stiffness unit cell is composed of a negative-stiffness component comprising a horizontal curved beam and a positive-stiffness component comprising an oblique straight beam. According to the sandwich structure, the quasi-zero-stiffness resonator of a novel structure serves as a core body, wider application in the ultra-low frequency vibration reduction field can be achieved, the band gap is adjustable, and the problems that a traditional metal base material structure is high in band gap frequency and limited in application field can be solved.

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.

The invention belongs to the technical field of precision equipment vibration reduction supporting structures, and particularly relates to a precision equipment vibration reduction supporting structure based on an elastic metamaterial, which comprises a precision equipment bottom plate, the precision equipment bottom plate is fixedly welded at the bottom of precision equipment, and the precision equipment bottom plate is fixedly mounted on the mounting ground through fastening bolts. And a damping mechanism is arranged between the precise equipment bottom plate and the fastening bolt. The interiors of the lower vibration reduction columns, the middle vibration reduction columns and the adjusting vibration reduction columns are divided into a plurality of cell structures through the regular hexagonal hole channels distributed in the lower vibration reduction columns, the middle vibration reduction columns and the adjusting vibration reduction columns in a honeycomb array mode, and the cell structures deform to absorb vibration energy and have the reflection and refraction effects on vibration; and finally, wide-frequency-domain and high-efficiency vibration suppression is achieved, stable operation of precision equipment is ensured, the vibration reduction effect is extremely good, and the problems that a traditional rubber vibration reduction pad is narrow in vibration reduction frequency band, and a spring vibration reducer is prone to resonance are solved.

The invention relates to a vibration damping and buffering protection superstructure based on local resonance and compression-torsion coupling. The vibration damping and buffering protection superstructure comprises a middle circular ring and two compression-torsion pipes, wherein the two compression-torsion pipes are symmetrically arranged with the middle circular ring as the center in a chiral mode. Each pressure torsion pipe comprises an outer circular ring and a connecting rod; the outer circular ring and the middle circular ring are coaxially arranged; two ends of the connecting rod are respectively connected to the middle circular ring and the outer circular ring; the plurality of connecting rods are uniformly arranged along the middle circular ring; and a resonance ball is arranged on each connecting rod in a penetrating manner. When vibration or impact invasion occurs, the superstructure generates a local resonance effect and a compression-torsion coupling mechanism, and the wave energy dissipation efficiency is better and more stable. Through the chiral symmetric pressure torsion tube, coupling of longitudinal and torsional deformation modes is realized, and polarization of longitudinal waves and torsional waves is promoted. Therefore, the polarized band gap can be induced to block longitudinal waves. Meanwhile, the resonance balls on the connecting rods generate a remarkable local resonance effect, and wave energy is dissipated through local resonance. According to the invention, impact protection and vibration isolation performance can be synergistically improved.

The utility model discloses a steel lining plastic storage tank with a pipe orifice sealing structure. The steel lining plastic storage tank comprises a steel lining plastic storage tank main body, the sealing assembly is arranged at the top of the steel lining plastic storage tank main body; the sealing assembly comprises a pipe body, a hollow sleeve, an air bag ring, a pipe plug, a pressing plate, threads and a rotary knob, the bottom end of the pipe body fixedly communicates with the top of the steel lining plastic storage tank body, the hollow sleeve is fixedly installed in the pipe body, the bottom of the air bag ring is fixedly connected with the top of the hollow sleeve, and the bottom of the pipe plug is in threaded connection with the interior of the hollow sleeve. The threads are formed in the bottom of the pipe plug and the hollow sleeve and used for connecting the pipe plug and the hollow sleeve, the pressing plate is fixedly installed in the middle of the pipe plug and makes contact with the air bag ring, and the rotary knob is fixedly installed on the top of the pipe plug. According to the scheme, the steel lining plastic storage tank body and the sealing assembly are arranged, the gap of the pipe opening of the pipe body is sealed, and the situation that air enters the steel lining plastic storage tank body and reacts with materials in the steel lining plastic storage tank body, and consequently the material quality is affected is avoided.

The application discloses an adjustable nonlinear dynamic vibration absorber and system, and has the technical scheme that a tuning mass block is slidably connected to the surface of a support plate, and first scissor structures are rotatably connected between the tuning mass block and the two ends of the support plate; the first scissor structures are provided with second scissor structures and dampers, the second scissor structures and the dampers can drive the first scissor structures to stretch and contract through elastic belts, the second scissor structures are provided with elastic elements for driving the second scissor structures to stretch and contract; the stretching direction of the elastic elements is parallel to the sliding direction of the tuning mass block, and is perpendicular to the damping direction of the dampers, so that the first scissor structures and the second scissor structures can realize vibration absorption through geometric nonlinearity when moving. The stiffness and damping characteristics of the application can be adjusted, and the linear elements can be used to realize nonlinear stiffness, damping and super-low natural frequency, and the problem of Duffing system instability that cannot be eliminated by traditional nonlinear vibration absorbers is solved.

An electromagnetic actuator assembly, integrated within a boring tool, for controlling unwanted machining vibration, comprising an outer tubular oscillating mass made of ferromagnetic material, through which the magnetic flux can pass; an inner stator that comprises an electromagnet assembly, located at the center of the tubular oscillating mass, for applying a controllable magnetic field to the oscillating mass; one or more damping elements, each having one or more springs and / or a damping material with predetermined stiffness and damping properties (such as a polymer or oil); a controller for providing a desired current to the electromagnets of the electromagnet assembly to obtain the controllable magnetic field; a holder for allowing the rotation of the electromagnet assembly to a desired angle, for stimulating the oscillating mass to apply a damping force, based on a combination of the magnetic field and stiffness and damping properties, which is aligned with the direction of the unwanted vibration.

The invention provides a resonance unit, a damping device and an applicable reactor thereof. The resonance unit comprises: a substrate having a first surface and a second surface opposite to each other, and an outer peripheral surface located between the first surface and the second surface; the resonance block is located on the first surface and the second surface, and the resonance block comprises a rigid material; the connecting unit comprises a connecting frame and a plurality of connecting columns, the connecting frame surrounds the base plate, each connecting column comprises a first end face and a second end face which are opposite to each other, the first end face is connected with the peripheral face of the base plate, the second end face is connected with the inner wall of the connecting frame, and the connecting unit comprises a flexible material. According to the resonance unit, the damping device and the applicable reactor, low-frequency vibration generated in the operation process of equipment in the reactor can be effectively inhibited, so that the service life of the equipment is prolonged, and the operation safety is improved.

Vibration control device (1) configured to dampen vibrations in an elongated structure, the vibration control device (1) comprising: - a support structure (2) configured to be anchored to the elongated structure, - a rotating frame (3) rotatably mounted on the support structure (2) around a first axis A1, and - a linear spring dashpot (6) comprising a first end (61) that is pivotably attached to the support structure (2) around a second axis A2 and a second end (62) pivotably attached to the rotating frame (3) around a third axis A3, wherein the rotating frame (3) comprises a mass (M) distant from said first axis A1, said linear spring dashpot (6) is configured to exert a force to bring said mass to a rest position such that the mass oscillates around the rest position about the first axis A1 when the vibration control device is biased by a vibration.

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.

A temporary damper assembly (1) for use during vertical storage and / or vertical transportation of a tower (2) is described, the damper assembly (1) comprising a liquid damper (10) tuned to the natural vibration frequency of the tower (2), a tower cover (11) realized to cover a ring-shaped upper opening (20) of the tower (2) during storage and / or transportation, a mounting interface (12) configured to suspend the liquid damper (10) from the ring-shaped upper opening (20) of the tower (2), and a load transfer interface (13) for transferring a load (F) between the liquid damper (10) and the tower (2). A method of suppressing vortex-induced vibrations in a tower (2) during vertical storage and / or vertical transportation of the tower (2) is also described.

A damping device for absorbing and / or damping vibrations of a vehicle part or isolating and / or damping a vibrating vehicle component includes a mass element, a fastening element for fastening the damping device to a vehicle part, and a spring device connecting the mass element to the fastening element to be capable of oscillation. The mass element or fastening element having a fastening device for fastening the spring device. The mass element and / or vehicle part comprises a supporting devices for supporting the spring device, wherein the spring device comprises a fastening device fixed to the fastening means and at least two supporting portions supported in opposite axial direction on the supporting device. The fastening device and supporting device are spaced apart in axial direction such that when supporting sections bear against the supporting device, the spring device is preloaded. The invention relates to a method of assembling a damping device.

To provide a dynamic vibration absorber capable of appropriately attenuating the vibration of an object. 【Solution means】The dynamic vibration absorber has a curved surface that is curved in a concave shape and has at least one groove formed in the bending direction, and moves in accordance with the vibration of the object. The dynamic vibration absorber includes a moving part that rolls or slides on the curved surface, and a mass body that moves in the bending direction by the rolling or sliding of the moving part.

A damping assembly is provided comprising a base comprising a circular opening and a support (200) configured to fit into said circular opening of said base. The support (200) comprises a base (210) having a cylindrical outer side surface. The support (200) comprises a damping cylinder (220) comprising an inner side surface surrounding the outer side surface of said base (210) and an outer side surface (222) configured to hold on said circular opening. Said damping cylinder (220) comprises at least one radial projection (230) extending from the inner side surface of said damping cylinder (220) or from the outer side surface of said damping cylinder (220). [Fig. 4]

It is provided methods of installing a mechanical damper apparatus to an external surface of a tower of a wind turbine, the tower being in an erect state.

The application relates to the technical field of wind power generation, and discloses a wind turbine design method adopting a frictional tuned mass damper, which adds a frictional tuned mass damper to a man platform in a tower drum of a wind turbine, establishes a motion equation of the wind turbine after adding the frictional tuned mass damper based on a structural dynamics principle, deduces a mathematical analytic expression of a system dynamic coefficient, and obtains parameters of the frictional tuned mass damper through a system optimization theory. The application solves the problems that the prior art is difficult to realize damping through the tuned mass damper in the narrow space in the cabin or the tower drum, and the damping control effect is poor.

The invention provides a vibration damping device and an applicable reactor, the vibration damping device comprises a vibration damping plate, the vibration damping plate comprises a plurality of resonance units, each resonance unit comprises a vibration damping base plate, the vibration damping base plate of each resonance unit is connected with the vibration damping base plate of the adjacent resonance unit, each resonance unit further comprises a mass block, and the mass block is connected with the vibration damping base plate of the adjacent resonance unit. The vibration reduction substrate is provided with a first surface and a second surface which are opposite to each other, the mass block is located on the first surface and the second surface, the vibration reduction substrate comprises a flexible material, and the mass block comprises a rigid material; the vibration reduction filter screen comprises a main filter screen plate placed in the first direction and a plurality of supporting rods placed in the second direction different from the first direction, one end of each supporting rod is connected with the vibration reduction plate, and the other end of each supporting rod is connected with the main filter screen plate; the supporting rods support the main filter screen plate so that the main filter screen plate can be located on the side, away from the vibration reduction base plate, of the first mass block or the second mass block.

The present disclosure includes a jounce bumper with a main body and an insert. The main body includes a first polymeric material. The insert is integral with the main body and includes a second polymeric material that is different from the first polymeric material. The insert further includes a first plate, a second plate, and a connecting lattice that connects the first plate and the second plate together. The first polymeric material of the main body is between the first plate and the second plate, and is within the connecting lattice.

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 damping assembly is presented that includes a mount having a circular opening and a support (200) configured to be inserted into the circular opening of the mount. The support (200) includes a base (210) having a cylindrical outer side surface. The support (200) includes a damping cylinder (220) including an inboard surface surrounding an outboard surface of the base (210) and an outboard surface (222) configured to remain on the circular opening. The damping cylinder (220) comprises at least one radial projection (230) protruding from an inner side surface of the damping cylinder (220) or from an outer side surface of the damping cylinder (220).

This invention discloses a tuned mass damper, relating to the field of tuned mass damper technology. The tuned mass damper includes a housing, two mass modules, and a cosine beam. The two mass modules are disposed within the housing and are spaced vertically. Each mass module includes a vibration-absorbing component and multiple elastic elements disposed around its periphery. The multiple elastic elements extend laterally along the vibration-absorbing component, with one end connected to the vibration-absorbing component and the other end connected to the housing. The cosine beam is disposed between the two vibration-absorbing components, with its upper end connected to the upper vibration-absorbing component and its lower end connected to the lower vibration-absorbing component. This application achieves a wider effective vibration suppression frequency band by using two vibration-absorbing components (upper and lower) in conjunction with the cosine beam to absorb vibration. By arranging multiple elastic elements around the vibration-absorbing components, compared to tuned mass dampers that absorb vibration in a single dimension, it achieves vibration absorption in multiple dimensions, and the structure is simple and easy to replace.