555 results about "Tuned mass damper" patented technology

The invention relates to a pendulum eddy current tuning mass damper device which comprises a support, a steel cable, a cable-length adjusting device, a mass block, a permanent magnet adjustment frame, a permanent magnet, a copper plate, a magnetic iron plate, a copper plate and magnetic iron plate adjusting frame, a limiting stopper and a limiting damper. The mass block is formed by connecting of a steel plate through bolts and is hung on the support through the steel cable, the length of the steel cable is adjusted by the cable-length adjusting device, the permanent magnet adjusting frame is installed on the bottom of the mass block, the magnetic iron plate is overlapped on the bottom of the copper plate, and the copper plate and the magnetic iron plate are connected on the copper plate and magnetic iron plate adjusting frame through the bolts. The copper plate and magnetic iron plate adjusting frame is installed on the structural base, the limiting stopper is placed on the periphery of the bottom of the mass block, one end of the limiting damper is connected on the limiting stopper, and the other end of the limiting damper is connected on the structural base which is placed below the limiting damper. The pendulum eddy current tuning mass damper device is long in service life, high in reliability, maintenance-free and high in sensibility and the like, damping adjustment is accurate, convenient and wide in adjustment range, and the friction of the whole TMD structure is nearly zero.

A force transmission device, in particular or power transmission between a drive engine and an output, comprising a damper assembly with at least two dampers, which can be connected in series, and a rotational speed adaptive absorber, wherein the rotational speed adaptive tuned mass damper is disposed between the dampers at least in one force flow direction through the force transmission device.

The invention relates to a permanent-magnet type eddy current tuned mass damper which comprises a steel magnetic-conducting baseplate (10), wherein end plates (3) are respectively arranged at two ends of the baseplate (10). The permanent-magnet type eddy current tuned mass damper is characterized by also comprising a circular shaft (4) and a linear bearing seat (5), wherein two ends of the circular shaft (4) are respectively arranged on the corresponding end plates (3), and the linear bearing seat (5) is sleeved on the circular shaft (4) and can slide on the circular shaft (4); the lower part of the bearing seat (5) is connected with a mass block (6), and two ends of the mass block (6) are respectively connected with the corresponding end plates (3) through spiral springs (7); the lower part of the mass block (6) is connected with a permanent magnet (13), and a copper plate (12) is arranged below the permanent magnet (13) and connected with the baseplate (12) through a cushion block (11). By adopting an eddy current damping model with special design, the permanent-magnet type eddy current tuned mass damper realizes the damping adjustability of the damper in a larger range, realizes the complete separation between the system rigidity and the damper, and cancels the mechanical friction energy consumption and stress concentration elements, thereby avoiding the common TMD damage failure.

A tuned mass damper comprising a frame, at least one bendable spring element being connected from its ends to the frame, and at least one mass element being connected to the spring element at a distance from the ends of the spring element, at least one movable spring support element for adjusting the tuning frequency of the damper, and means for moving the spring support element.

The invention relates to a horizontal vibration energy-absorbing and vibration-damping device used for large engineering structures such as a longspan foot bridge, belonging to the field of vibration control of civil engineering structures. The horizontal vibration energy-absorbing and vibration-damping device comprises a constant strength cantilever beam consisting of struts at two sides and a cross beam, two ends of the cross beam are respectively and correspondingly connected with the struts at two sides, and the bottom ends of the struts at two sides are fixed on a foundation. The horizontal vibration energy-absorbing and vibration-damping device is characterized in that the upper end of a mass block is connected with the cross beam, the lower end of the mass block is provided with a rectangular permanent magnet; and one side of the lower part of the mass block is provided with a copper plate fixedly arranged on the foundation through a supporting member, and a gap is reserved between the copper plate and the rectangular permanent magnet. The invention ensures that the rigidity and the dampness of the tuned mass damper system realize complete separation, easily realizes that the damping ratio of TMD is continuously adjustable within a larger range though regulating the gap between the permanent magnet and the copper plate, and effectively solves the problems of oil leakage failure in the conventional TMD, difficult regulation of the damping parameters and interference on the frequency.

A tuned mass damper for attenuating vibrations in a selected plane of a mechanical structure, by magnetically induced eddy current damping. A moving damper mass is coupled to a vibrating mass through one or more flexures that confine relative movement of the damper mass substantially to the selected plane. A magnet structure is rigidly attached to either the vibrating mass or the damper mass, and a conductor plate is attached to the other of these masses. Movement of the damper mass relative to the vibrating mass induces eddy currents in the conductor plate and thereby generates a damping force that attenuates vibration in the selected plane.

The invention relates to a three-dimensional tuned mass damper device with a clamping groove. The three-dimensional tuned mass damper device comprises an outer sleeve, an outer bottom plate, an upper clamping plate, an upper tunable mass block, a lower tunable mass block, an upper clamping groove outer ring, an upper clamping groove inner ring, a lower clamping groove outer ring, a lower clamping groove inner ring, a horizontal spring, a vertical spring, a horizontal damper and a vertical damper. The mass of the dampers is adjusted by adjusting the number of the mass blocks so as to achieve the frequency adjustment of the dampers; and due to a three-way limiting device, the frequencies in different directions are not influenced and the purpose of three-dimensional shock/vibration absorption is achieved. The three-dimensional tuned mass damper device can control the influence of the air vibration effect on the structure and reduce the effect of an earthquake on the structure, and can be used for vibration control of building structures such as bridge constructions, ocean platforms, large-span cantilever structures and the like.

This invention relates to the braking system of a vehicle and a method to attenuate noise-producing vibrations of components of the braking system by the use of tuned mass dampers of various designs mounted with respect to the brake pads and/or damper plate of a disc brake system. In another embodiment, the tuned mass dampers are attached to the brake shoes and/or drum brake backplate of a drum brake system.

A tuned mass damper for sound-dampening brake squeal noise is located within a hole formed in a brake component such as a backplate supporting a brake pad. The location of the hole and the weight and geometry of the tuned mass damper are tailored to provide effective damping for the particular frequencies that are to be eliminated in the brake system. Locating the tuned mass damper inside of a hole in the component has packaging and manufacturing advantages, and results in a tuned mass damper that is less susceptible to damage when in use. The hole may be blind, the bottom of the hole being thin enough to serve as a spring member to which a vibration damping mass is attached. In one embodiment, the tuned mass damper is a module adapted for insertion into the hole in the brake backplate. Contact between the module and inner surfaces of the hole transfers mechanical vibration of the backplate to the tuned mass damper.

The invention provides an adjustable damping energy storage type tuned mass damper. A damping adjusting device of a damper of consists of a permanent magnet, coils, auxiliary rods, an energy storage battery, an adjustable resistor, a light-emitting diode (LED) pre-warning indicator light; in the reciprocating motion process that the damper absorbs the vibration energy of a main structure so as to generate inertial mass, a cylindrical spiral spring provides damping, the permanent magnet generates a variable magnetic field, induced electromotive force is generated in the coils so as to generate induction current, and the induction current generates electromagnetic damping to inhibit the movement of the permanent magnet; the adjustable resistor in the damping adjusting device is adjusted, so the magnitude of the electromagnetic damping is changed, and the damping ratio of a structure reaches the optimum damping ratio; and residual energy is recovered by using the energy storage battery, the LED pre-warning indicator light provides a pre-warning indication for a pedestrian and a vehicle, and multiple effects of vibration controlling, clean energy recovery, pre-warning and alarming of vibration conditions and the like.

The invention discloses a tuned mass damper structure for reducing pipeline vibration. In the invention, an entire outer ring is in a dividable structure and is formed by combining two identical and symmetrical half outer rings by using two bolts; an entire inner ring is also in a dividable structure and is formed by combining two identical and symmetrical half inner rings by using another two bolts; a plurality of springs and dampers having the same number with the springs are circumferentially and symmetrically arranged between the entire outer ring and the entire inner ring, thus the supporting rigidities and the damping performances of the outer ring in all directions of the circumference are same; and the inner diameter of the entire inner ring is smaller than the outer diameter of a clamped damping pipeline. When the vibration of the traditional pipeline is needed to be reduced, the rigidity of the springs and the damping of the dampers are calculated as actually required, and then a manufactured tuned mass damper is fixed on the pipeline on the spot, thus a required damping effect can be obtained. The damper is in a dividable structure and has the advantages of simple structure, high reliability and easiness for realization.

The present invention is a “beam type” tuned mass damper (TMD) having beams of constrained layer viscoelastic laminate material affixed to a mounting base or directly to the host structure and a method of use. The “beam type” TMD of the present invention is able to damp several frequencies by combining beams of varying characteristics to the mounting base, such as by changing the geometrical or material properties of the constraining layers and the viscoelastic layer of the constrained layer viscoelastic laminate.

A pendulous eddy current tuned mass damper vibration reduction control device comprises a support and 1-4 mass blocks hung at the top end of the support through swing ropes, and an eddy current damping system and a guide mechanism are installed between each mass block and the support; each eddy current damping system comprises a permanent magnet and a conductor plate, the conductor plates are installed on the side faces of the mass blocks, and the permanent magnets are installed on the inner sides, corresponding to the conductor plates, of the support; the guide mechanisms are symmetrically installed on the two sides of the mass blocks in the swing direction, and each guide mechanism comprises guide plates fixedly installed on the two sides of the corresponding mass block and guide bearings installed on the inner sides of the support and making rolling contact with the corresponding guide plates. The support is provided with a pendulum length adjustment component and movable rolling wheels, the four corners of the pendulum length adjustment component are movably connected with the support, and a locking mechanism for fixing the swing ropes is arranged in a frame which is the pendulum length adjustment component. The control device is convenient to move in whole, frequency and damping coefficients are convenient to adjust, frictional damping is low, sensitivity of the mass blocks is high, the damping ratio of eddy currents can be freely adjusted within the range from 1% to 20%, and no additional rigidity is generated.

Disclosed is a rotor adaptive continuous frequency TMD for rotary machinery. The TMD is in a cage structure and comprises a mechanical structure and a control system. The mechanical structure comprises a connection transmission mechanism and a rigidity continuous adjustable tuning mass mechanism. According to the damper, a screw is driven by a stepping motor to rotate, an annular mass block is pulled by a nut matched with the screw to reciprocate to adjust the frequency of the TMD to achieve real-time tracking continuous adjustment of the inherent frequency of a TMD subsystem, so that the frequency of the subsystem is consistent with the main vibration frequency of the rotor to be adapted to the frequency changes of the rotor in the actual condition. The TMD is adaptable to vibration of various frequency components of rotary machinery and has the advantages of being apparent in damping effect, compact in structure, small in required space, high in reliability, large in rigidity adjusting range and the like.

The invention belongs to the technical field of damping for civil engineering structure, and particularly relates to a tuned mass damper used for controlling the low-frequency vibration of a building structure. The tuned mass damper comprises suspension components, a damping device and a mass block and is characterized by further comprising at least one swing support, when more than one swing support is arranged, the swing supports are nested from outside to inside, the lower part of each swing support is connected with the adjacent suspension component at the outer side of the swing support, and the upper part of the swing support is connected with the adjacent suspension component at the inner side of the swing support; the lower end of the adjacent suspension component at the inner side of the swing support is further connected with the adjacent swing support at the inner side of the suspension component or with the mass block; and the damping device is connected with the mass block. The tuned mass damper is compact in spatial structure, suitable for control on the vibrations of structures with frequencies of 0.15 Hz and even lower, great in cost performance, capable of effectively expanding the application range of swing-type tuned mass damper products, and very wide in market application prospect.

The invention relates to a two-way horizontal adjustable tuned mass damper which comprises a rectangular base that is provided with a longitudinal trolley, wherein a transverse trolley is arranged on the top of the longitudinal trolley; the front end and the rear end of the longitudinal trolley are respectively provided with a first damper; one end of each first damper is connected with a longitudinal trolley body by a universal coupling, and the other end of the first damper is connected with the base by another universal coupling; the front end and the rear end of the transverse trolley are respectively provided with a second damper; one end of each damper is connected with a transverse trolley body by a universal coupling, and the other end of the second damper is connected with a second sliding block by another universal coupling; two longitudinal sliding rails are respectively arranged at the two sides of the base; the second sliding blocks are respectively matched with the longitudinal sliding rails; and a balancing weight is arranged on the transverse trolley. The two-way horizontal adjustable tuned mass damper is capable of realizing two-way shock absorption, and only needs one set of balancing weight, so that the weight of the tuned mass damper is lighter than that of the traditional tuned mass damper, the burden of a building is low, and the damping effect is good; and the two-way horizontal adjustable tuned mass damper is especially suitable for buildings such as a high-voltage power transmission tower and a radio tower.

The invention relates to a high-frequency tuning mass damper which comprises a connection plate, elastic elements, damping elements and a mass block. The mass block is arranged between the connection plate and a pre-tensioning connection piece, and the elastic elements are arranged between the mass block and the pre-tensioning connection piece and between the mass block and the connection plate respectively. The damping elements are arranged between the mass block and the pre-tensioning connection piece or/and between the mass block and the connection plate. A pre-tensioning structure is arranged between the connection plate and the pre-tensioning connection piece. The pre-tensioning structure exerts pre-tensioning force on the elastic elements to compress the elastic elements until the end portions of the elastic elements are fully contacted with the adjacent mass block, or the pre-tensioning piece or the connection plate. The elastic elements are made to be in a linear changing stage in which external force borne by the elastic elements and compression displacement of the elastic elements are in direct proportion. The high-frequency tuning mass damper is compact in space structure, suitable for control over vibration of a structure with 15Hz or higher frequency, superior in cost performance ratio, and wide in market application prospect.

A simple self-tuned mass damper is hereby proposed for a broadened frequency band and which can be adapted to large and expensive structures as well as small and inexpensive structures alike. The novel self-tuned mass damper includes an auxiliary mass and a non-linear suspension, which is configured to connect the auxiliary mass to a vibrating structure. The mass of the auxiliary mass and the stiffness of the non-linear suspension are selected such that the natural frequency is at least 6 Hz and that the amplitude of the relative displacement of the auxiliary mass in respect to the vibrating structure is at most 12 mm.

The invention provides a universal swing track supporting turned mass damper. The damper comprises a support, a hemispherical mass block, a cable-stayed spring and a damper body; the support is shaped like a cylinder, the upper portion of the support is provided with a circular-arc concave surface which is provided with a heavy universal sphere, the bottom of the hemispherical mass block is arranged in the circular-arc concave surface, and the periphery of the upper portion of the hemispherical mass block is connected with the support through the cable-strayed spring and the damper body. A high-damping rubber buffer layer is arranged on the circular-arc concave surface of the support, and the heavy universal sphere is fixed on the high-damping rubber buffer layer. According to the universal swing track supporting turned mass damper, wind vibration in different directions and earthquake structure responses can be controlled, the hemispherical mass block can universally swing under the action of wind vibration and earthquakes, and when the hemispherical mass block swings, the cable-stayed spring and the viscous liquid damper can move to dissipate energy simultaneously.

The invention relates to a tuned mass damper adjustable in three directions. The tuned mass damper is used for the vibration reduction of building construction and bridge engineering structures. The tuned mass damper comprises a bracket (2). Slings (1) are arranged on the upper part of the bracket (2). A mass block (5) is arranged on the lower parts of the slings. Springs (7) are arranged on the lower part of the mass block (5), and are positioned on a bottom plate (8). Viscous dampers (6) are arranged between the mass block (5) and the bottom plate (8). A guide rod (4) is connected to the bottom plate (8). The guide rod (4) and a guide sleeve (3) on the bracket form a guide mechanism to limit horizontal movement between the bracket and the bottom plate. The tuned mass damper can be used for the tuned reduction of the vibration of building construction structures, bridge engineering structures and the like in the three directions, natural vibration frequencies in the three directions can be conveniently adjusted, and the damping ratio of the three directions can also be adjusted according to needs.

The invention relates to an optimal design method for a tuned mass damper of elastic support dry friction for controlling cutting vibration, relating to an optimization method of structural parameters for inhibiting a cutting vibration processing damper. The invention, aiming at an elastic support serial dry friction damper, provides the optimization method of structural parameters thereof, comprising the following steps of: firstly, acquiring the primary module state mass, the rigidity and the damping coefficient in a weak loop of a controlled cutting system through the module state testing technology; then establishing module dynamically for the cutting system additionally provided with the tuned mass damper of elastic support dry friction and acquiring the frequency responding function of the controlled cutting system through the numerical calculation method; and finally, carrying out the optimal design by adopting the numerical optimization method, and taking maximum negative real part of the frequency responding function of the controlled cutting system as the optimal object and fixed frequency, elastic support rigidity of the tuned mass damper of elastic support dry friction as the optimal parameters of the damper. The optimum design can exert two energy consumption abilities of friction damping and oscillator vibration at the same time to maximum extend so that the cutting stability is optimized.

The invention belongs to the field of horizontal vibration control devices for civil engineering structures and particularly relates to a magnetic suspension type horizontal tuned mass damper. The magnetic suspension type horizontal tuned mass damper comprises a frame and a mass block in the middle of the frame, the frame comprises vertical plates on two sides, an upper cross beam and a lower cross beam are connected between the vertical plates, and support bottom plates are arranged at the lower ends of the vertical plates. A linear guide rail and a slider sliding along the linear guide rail are fixed above the middle of the lower cross beam, the mass block is fixedly connected with the slider through screw nuts, a damper is connected between the mass block and each vertical plate, a pressure spring sleeving the lower cross beam is mounted between the mass block and each vertical plate, a first rectangular permanent magnet is fixedly mounted at the top of the mass block, and a second rectangular permanent magnet is arranged on the upper cross beam corresponding to the first rectangular permanent magnet. According to the magnetic suspension principle, friction between the slider and the linear guide rail is reduced to enable normality in operation of the horizontal TMD (tuned mass damper) even in weak vibration environment, flexibility and reliability of the TMD are improved, and service lives of the slider and the linear guide rail are prolonged owing to low friction.