619results about "Friction dampers" patented technology

The invention discloses a star-shaped particle damping mechanical metamaterial vibration isolation device which comprises a protective shell, a vibration transmission device, a self-lubricating plate and an internal vibration reduction device. The protective shell is composed of an upper protective shell body and a lower protective shell body. The two vibration transmission devices are arranged on the two sides of the protection shell and each comprise a bearing plate, a force transmission plate, a sliding rod and a compressed spring. The sliding rod penetrates through the two ends of the through hole of the protective shell to be connected with the force transmission plate and the internal damping device. The two self-lubricating plates are fixed to the inner surfaces of the upper protective shell and the lower protective shell correspondingly. The vibration reduction device is composed of a vibration reduction outer frame, a cross clamping block, a quadrangular star clamping block and a spherical particle damper, and the vibration reduction outer frame comprises a vibration reduction baffle, an arc-shaped pressing device and a right-angle pressing device; the cross-shaped clamping block comprises a cross-shaped frame and a right-angle pressing device, the cross-shaped clamping block and the quadrilateral star clamping block are periodically arranged on the inner side of the vibration reduction outer frame, and the spherical particle dampers are arranged among the vibration reduction outer frame, the self-lubricating plate, the cross-shaped clamping block and the quadrilateral star clamping block and are pressed through the arc-shaped pressing device and the right-angle pressing device.

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 relates to a transformer vibration reduction method based on particle damping, which comprises the following steps of: finding out the maximum vibration deformation position of a transformer by using modal analysis, arranging a hole-shaped cavity on a radiating fin of the transformer, and filling particles in the hole-shaped cavity; the vibration reduction amplitude values corresponding to the multiple sets of design parameters are obtained through simulation, iteration is conducted on the design parameters by establishing a linear regression model, and the design parameters with the optimal vibration reduction effect are obtained on the premise that the structural rigidity is met; the hole-shaped cavities in the cooling fins extend from the sides, away from the transformer, of the cooling fins to the transformer, and the cooling effect of the cooling fins cannot be affected. A discrete element method and a finite element method are used for conducting simulation analysis on various particle dampers of different design sizes. And after a result is obtained, establishing a regression model by utilizing data obtained by simulation, optimizing parameters, and carrying out iterative simulation to obtain an optimal scheme.

The invention belongs to the technical field of bridge wind-induced vibration control, and provides a one-way friction energy dissipation device for controlling flutter of a large-span bridge. The device is quickly mounted before extremely strong wind comes, the flutter safety of the bridge can be temporarily and greatly improved, the wind resistance design requirement of the device is lowered, and the construction cost is remarkably reduced. After strong wind, the device can be conveniently disassembled, the appearance of the bridge is not influenced, and under-bridge navigation is not interfered. The application of the one-way bearing enables the weight, transportation, loading, unloading and storage cost of the balancing weight to be greatly reduced. The device can adapt to any static wind displacement, is good in robustness, safe, reliable, economical, fast, efficient and practical, can be shared by multiple bridges in different periods, and greatly reduces the self and storage cost. The device can also be applied to vibration control of large ocean structures such as floating ocean platforms and floating fans and temporary berthing ships under the combined action of stormy waves and wind vibration control of soft photovoltaic structures for a long time.

A portable supporting stand for supporting a portable metrology device, such as a laser tracker device, at a predefined height includes at least one leg having an elongated member, where, in a deployed state, the portable supporting stand is a substantially rigid support stand that is arranged to substantially rigidly support the portable metrology device on a floor surface. The portable supporting stand also includes a vibration damper unit for reducing vibrations of the portable supporting stand.

The invention relates to the field of machinery, in particular to a three-way composite vibrator dynamic vibration absorber and a vibration absorbing method. The three-way composite vibrator dynamic vibration absorber comprises an elastic support, the elastic support comprises an elastic support base, and the elastic support base is provided with a fixing hole. The elastic support base is further connected with four free ends, and free end foundation plates are arranged at the four free ends. Mounting holes are formed in the free end foundation plate; the nonlinear oscillator A, the nonlinear oscillator B and the linear oscillator C are combined together to form a special composite oscillator; the vibration absorber has the beneficial effects that dynamic vibration absorption and vibration and noise reduction can be realized in three mutually orthogonal directions, the vibration absorber can normally work in weightlessness, severe and complex environments, can simultaneously adapt to external excitation with different intensities and multiple angles, has a relatively wide matching frequency, can effectively absorb vibration energy of a power device or a mechanical structure, and has a good application prospect. And vibration and noise generated thereby are suppressed.

The invention relates to the technical field of vibration isolation and reduction engineering, and discloses a modular multi-mechanism vibration isolation, energy consumption and vibration absorption integrated device and a control method thereof.The modular multi-mechanism vibration isolation, energy consumption and vibration absorption integrated device comprises a support, a plurality of corrugated plates are fixedly connected to the interior of the support, and magnetorheological dampers are fixedly connected to the bottoms of the inner walls of the corrugated plates; a magneto-rheological damper is fixedly connected to the top of the support, a dynamic vibration absorber is fixedly connected to the top of the magneto-rheological damper, a particle damper is fixedly connected to the top of the dynamic vibration absorber, a control unit is arranged on the outer side of the support, the magneto-rheological damper comprises a first shell, and a piston rod is fixedly connected to the inner wall of the first shell. By integrating multiple mechanisms such as corrugated plate vibration isolation, particle damping energy consumption, dynamic vibration absorber vibration absorption and magneto-rheological damper intelligent control, all-directional vibration suppression is achieved, under different frequencies and vibration working conditions, all modules work cooperatively, the vibration reduction effect is greatly improved, and the vibration isolation efficiency gt within the broadband of 20-2000 Hz is ensured; 85%.

In the field of vibration absorbers, the invention provides an anti-symmetric rack beam type self-adaptive vibration absorption device and a frequency modulation method thereof, and the anti-symmetric rack beam type self-adaptive vibration absorption device comprises two seat plates which are arranged in parallel up and down; the upper rolling wheel is installed on the lower surface of the upper seat plate, the lower rolling wheel is installed on the upper surface of the lower seat plate, the first rack and the second rack are arranged between the two seat plates in parallel, the first rack and the second rack are respectively clamped by at least one rolling wheel set, and the first rack and the second rack are arranged in an antisymmetric mode; the gear is arranged between the first rack and the second rack, the gear is meshed with the first rack and the second rack, and when the gear rotates, the gear drives the two racks to move linearly relative to each other or move linearly opposite to each other at the same time; according to the invention, the effective length is adjusted through gear transmission so as to achieve the purpose of frequency modulation, the frequency modulation is accurate and stable, the structure is simple, the adaptability is high, the maintenance is convenient, and the cost performance is high.

Disclosed in the present application is a plate-shaped structure with vibration damping and limiting functions. The plate-shaped structure comprises an upper plate, a lower plate, phononic crystal vibration-damping cell elements, diagonally tensioned friction-damping cell elements and C-type limiting cell elements, wherein the phononic crystal vibration-damping cell elements and the diagonally tensioned friction-damping cell elements are disposed between the upper plate and the lower plate and are periodically arranged at intervals; and the C-type limiting cell elements are distributed at four corners of the plate-shaped structure. The present application has an ingenious design, and arranging the phononic crystal vibration-damping cell elements and the diagonally tensioned friction-damping cell elements between the upper plate and the lower plate to form a periodically arranged array, and arranging the C-shaped limiting cell elements at the four corners of the plate-shaped structure greatly reduce the mounting space for an electronic device and a vibration control apparatus, and solve the current problems of vibration isolators for electronic devices, i.e., poor vibration-damping and impact-resistant effects and a large displacement during operation.

Embodiments of the present invention relates to friction damper (100) for washing or drying machines comprising a tubular hollow body (110) and a damping rod (120) arranged coaxially with respect to one another for moving along each other telescopically, wherein the damping rod (120) has an outer diameter less than an inner diameter of the hollow body (110).The hollow body (110) further comprises the hollow body (110) comprises a holder (130) for holding a friction unit (200). The friction unit (200) comprises a unit body (210); a friction member (220) inside the unit body (210) to which the damping rod (120) is slidably coupled for generating a friction force onto the damping rod (120); a stationary pressure element (230); a slidable pressure element (240) surrounding at least another part of the friction member (220); a linear actuator (260) fixed to the unit body (210) for providing a sliding motion to the slidable pressure element (240).

A friction damper for dampening out vibrations generated by a drum of a laundry treating machine includes a hollow piston body; a piston rod adapted to move telescopically along a central longitudinal axis of the hollow piston body; a friction element made of a resilient material interposed in between the hollow piston body and the piston rod, wherein a friction occurs when the piston rod moves relative to the hollow piston body; fixation portions provided at free ends of the piston rod and the hollow piston body to connect the friction damper to the laundry treating machine; at least one stopper portion interposed in between the hollow piston body and the piston rod for limitation of a motion of the friction element in a direction of the central longitudinal axis.

A 3D variable damping vibration isolator based on rubber friction and extrusion mechanism is composed of a base, an upper plate, a vibration isolation spring, “” shaped bolts, lock nuts, damped rubber blocks and a shell. The damped rubber blocks are vulcanized and bonded to the external vertical surfaces of vertical steel angles uniformly distributed on the base and are opposite to each other in pairs; the upper end of each “” shaped bolt is fixed to the upper plate by upper and lower (two) lock nuts, and cross bars at the lower end are squeezed by the damped rubber blocks on both sides; contact surfaces of the damped rubber blocks and the “” shaped bolts are flat-a design of variable cross-section. The vibration isolation spring is sheathed between the base and a lug boss in the center of the upper plate.

The utility model discloses a friction damper device, which includes a main support steel plate of the damper device, a mounting flange fixedly connected to the side surface of the main support steel plate of the damper device, a first threaded rod movably connected to the inner ring surface of the main support steel plate of the damper device, a support sheet movably connected to the outer surface of the first threaded rod, a first threaded rod movably connected to the inner ring surface of the main support steel plate of the damper device, and a first gasket movably sleeved on the outer ring surface of the first threaded rod. The device can facilitate users to use and limit the installation of one end of the damper device through the mounting flange fixedly connected to the side of the main support steel plate of the damper device and the multiple mounting openings opened thereon and equipped with bolts, and can facilitate users to use and limit the installation of the other end of the damper device through the multiple clamping openings opened through the fixed clamping block and equipped with bolts.

The present invention provides a terminal-equipped damper device with which it is possible to achieve a reduction in size in a direction intersecting the sliding direction of a rod and leading outward of a case. This terminal-equipped damper device 10 comprises a body case 20, a rod 40, and a damper structure. The rod 40 has a pressing portion 47 that, by means of the sliding position thereof, presses against a first terminal 60 and causes the first terminal 60 to make contact with a second terminal 70. The first terminal 60 is disposed on the outer side of the body case 20 and has a first extending portion 61 that extends in the sliding direction of the rod 40, a first contact portion, and a receiving portion 62 that is pressed by the pressing portion 47. The second terminal 70 is disposed on the outer side of the body case 20 in a position facing the first terminal 69 and has a second contact portion and a second extending portion 71 that extends in the sliding direction of the rod 40.

The invention relates to a vibration absorption unit with a three-dimensional negative Poisson's ratio effect and a vibration absorption device, and relates to the technical field of vibration reduction devices. The vibration absorption unit comprises a metal frame and a vibration absorption unit, wherein the metal frame has a three-dimensional negative Poisson's ratio effect; the elastic piece is arranged in the metal frame, and the elastic piece is connected with the inner wall of the metal frame; the load block is arranged in the metal frame, and the load block is connected with the elastic piece; and the fixing piece is connected with the elastic piece and the load block. The vibration absorption unit provided by the invention overcomes the defect that a traditional two-dimensional negative Poisson's ratio honeycomb structure only presents a negative Poisson's ratio effect in a single dimension, and is suitable for a multi-axis loading condition. Meanwhile, the metal frame is combined with the elastic piece and the load block in the metal frame, so that the vibration reduction effect at a specified frequency point can be achieved, the phenomenon that the low-frequency vibration line spectrum is prominent can be avoided, and when the external excitation frequency is close to the inherent frequency of the vibrator system, the energy of elastic waves is greatly absorbed; therefore, the propagation of elastic waves in the vibration absorption unit and the vibration absorption device is isolated.

The invention discloses an inerter particle damping dynamic vibration absorption system based on a reciprocating pump and a design method. The inerter particle damping dynamic vibration absorption system comprises a spring, the reciprocating pump connected with the spring, a driving impeller unit arranged at the top of the reciprocating pump and a particle damping inerter stirring unit arranged at the top of the driving impeller unit. The reciprocating pump comprises a pump shell, a pump rod and a valve clack; the driving impeller unit comprises an impeller shell arranged at the top of the pump shell and a driving impeller arranged in the impeller shell; the particle damping inerter stirring unit comprises an inerter shell arranged at the top of the impeller shell, damping particles arranged in the inerter shell and a stirring impeller; the driving impeller and the stirring impeller are coaxially connected through an impeller rod; a liquid inlet pipe and a liquid outlet pipe are arranged between the pump shell and the impeller shell; working liquid is pressurized through the reciprocating pump and then drives the driving impeller to rotate, the coaxial stirring impeller is driven to stir the damping particles to rotate, the rotating motion of the damping particles except the up-down motion of the reciprocating pump is achieved, and therefore the vibration absorption effect is improved.

The invention provides a steel rail damper. The steel rail damper comprises a shell, a plurality of damping modules and an elastic piece. The shell is suitable for being assembled on a steel rail; the multiple damping modules are sequentially installed in the shell in the extending direction of the steel rail, and the damping modules are filled with damping particles in a free state; the elastic piece is arranged between the plurality of damping modules and the inner wall of the shell; wherein at least two damping modules are filled with damping particles with different particle diameters and / or filling rates. The invention further provides a design method applied to the steel rail damper.

The invention relates to a staged self-adaptive damping device for the longitudinal bridge direction of a beam bridge, and belongs to the technical field of civil engineering energy dissipation and damping. The damping device is mainly composed of connecting components (including six types of sub-components), energy consumption components (including two types of sub-components) and reset components, the energy consumption components and the reset components are embedded in the sub-connecting components, and the three types of components are matched with one another to form the damping device. The damping device adopts a staged and self-adaptive design concept, that is, the whole device provides rigidity for the structure under a small earthquake, the two types of sub-energy-dissipation components provide energy dissipation ways for the middle earthquake stage and the large earthquake stage respectively, and the self-adaptive threshold value of the device is determined by the length of a transverse long circular hole in a sub-connecting device. The staged self-adaptive damping device for the longitudinal bridge direction of the beam bridge is novel in structural design, reasonable in reset mode, convenient and fast in engineering installation and good in application prospect.

The utility model discloses a composite vibration isolation module structure which comprises a vibration reduction mechanism and a steel plate spring installed in the vibration reduction mechanism. Connecting mechanisms are arranged on the left side and the right side of the vibration reduction mechanism correspondingly, and one side of each connecting mechanism is connected to the bottom end of the base in an attached mode. The damping mechanism comprises a base, limiting grooves are formed in the left side and the right side of the top of the base, and first springs are fixedly connected to one sides of the interiors of the two limiting grooves. One end of the first spring is fixedly connected with a sliding block, and the bottom of the sliding block is slidably connected with the limiting groove. The ends, away from the first springs, of the sliding blocks are fixedly connected with particle dampers, the ends, away from the sliding blocks, of the particle dampers are fixedly connected with the limiting grooves, the vibration isolation and noise reduction requirements of vibration source equipment can be met through the vibration reduction mechanism, and resonance can be well avoided; and by arranging the connecting mechanism, the damping mechanism can be quickly disassembled and assembled without using any tool, so that the working efficiency is improved.

The invention relates to a spindle arrangement for a locking element (2), in particular a tailgate, of a motor vehicle (3), wherein the spindle arrangement (5) comprises a spindle unit (6) with a threadless or threaded spindle (8) having an axially extending geometric spindle axis (7) and a threadless or threaded spindle guide bushing (9) in which the spindle (8) is guided, for performing, in particular, linear adjustment movements along the geometric spindle axis (7) between a spindle-side connection (10) and a spindle guide bushing-side connection (11), wherein the spindle (8) is axially fixedly coupled to the spindle-side connection (10) and the spindle guide bushing (9) is axially secured radially inside a spindle guide tube (12), which is axially fixedly coupled to the spindle guide bushing-side connection (11), on the spindle guide tube (12).It is proposed that, in the event of an axial movement of the spindle (8) relative to the spindle guide tube (12) in at least one direction of movement, the acceleration of the spindle (8) relative to the spindle guide tube (12) exceeding a predetermined threshold activates a braking device (13) which causes the axial movement to be decelerated.

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 seismic device, has a housing configured to be engaged with a first structure, and a plurality of pairs of crossmembers, each pair of crossmembers being configured to receive part of a baseplate member which is configured to be engaged with a second structure. The crossmembers of each pair are biased toward each other to provide a frictional force to the baseplate member to resist axial movement of each crossmember pair relative to the baseplate member.

The present disclosure relates to a strut and a landing gear including the strut, and more particularly, to an disclosure in which a strut is formed of a curved pipe formed of a flexible body to reduce a weight of a component, and at the same time, an impact load of the strut and the landing gear is alleviated through a design of the physical properties and shape of the strut.

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

The invention relates to a particle damping and electromagnetic suspension mixed vibration isolation test platform and a working method thereof. The platform is divided into an upper platform part and a lower platform part, the upper platform part comprises an upper supporting frame, an electromagnet and a suspension vibration sensor, the suspension vibration sensor monitors the suspension vibration condition of the upper platform part and collects signals, and the signals are transmitted to a suspension vibration controller and drive the electromagnet to generate response electromagnetic force for active vibration reduction; suspension vibration isolation is achieved; the platform lower portion comprises a lower supporting frame, a hollow groove, damping particles and a vibration sensor, the vibration sensor monitors the suspension vibration condition of the platform lower portion, the vibration controller calculates the rigidity and damping which should be achieved, the number of the damping particles is controlled to change the rigidity and damping of the platform lower portion, and particle damping vibration attenuation is achieved. Compared with the prior art, the full-band vibration energy attenuation and vibration isolation device has the advantages of achieving full-band vibration energy attenuation and vibration isolation, being good in vibration isolation effect, stable, high in integration degree, high in flexibility, high in practicability and the like.

A helmet comprising first and second parts and a connector connecting the first and second parts of the helmet, the connector comprising: a first plate; a first anchor point on one side of the first plate, configured to be connected to the first part; a second plate located on an opposite side of the first plate from the first anchor point; a second anchor point on an opposite side of the second plate from the first plate, configured to be connected to the second part; a low friction interface provided between opposing surfaces of the first and second plates; and a cuff of deformable material provided around the first and second plates, and configured to at least partially cover the side of the first plate on which the first anchor point is located and to at least partially cover the side of the second plate on which the second anchor point is located.

The invention discloses a multifunctional integrated cooling and safety protection device for underground heat damage treatment. The multifunctional integrated cooling and safety protection device comprises a walking mechanism, a protection shell, a cooling mechanism, a monitoring mechanism, a standby power supply, an emergency material storage cabinet and an ice maker. The device can be flexibly arranged underground and quickly deployed to an underground heat damage area, the energy consumption is lower, and the real-time adjustment delay and hysteresis of the underground temperature are avoided. In the heat damage treatment process, the sound fatigue influence of noise factors on underground miners is fully considered, the noise level is effectively reduced in the equipment operation process, and a relatively quiet operation environment is provided for the underground miners. Aiming at potential operation risks existing in a well, environment monitoring and alarming functions are particularly added, meanwhile, emergency self-rescue and safety protection functions are provided, a temporary safety environment can be provided for miners in an emergency, the survival probability of the miners is increased when dangers occur, and the safety of the miners is improved. Finally, a downhole operation safety guarantee system integrating cooling, noise reduction, environment monitoring and alarming functions is formed.

In order to achieve all the purposes mentioned above and that will emerge from the detailed description below, the present invention is related to a vibration energy damping mechanism (10) having at least one fixing element (20) that can be connected with at least one first structural member (90) and at least one second structural member (100) in order to increase the resistance of structures against events that cause vibrations, such as earthquakes. Accordingly, its novelty is that it comprises at least one plate (30) configured between said at least two fixing elements (20), and in order to increase the load capacity and energy damping capacity of the structural system by increasing the displacements as a result of vibrations, it comprises at least two friction regions (I) having at least one disk (40) providing damping as a result of friction by being positioned between at least two elements that have the degree of freedom to move relative to each other during vibration.