30results about How to "Good vibration reduction effect" patented technology

The utility model relates to the technical field of keyboards, and discloses a spring damping buffer structure for a keyboard, which comprises a keyboard whole body, the keyboard whole body comprises keyboard keys and a buffer mechanism arranged below the keyboard keys, and the lower part of the buffer mechanism is connected with a damping mechanism; the buffering mechanism comprises a bearing seat, a buffering spring is connected to the lower portion of the bearing seat, the bottom end of the buffering spring is connected to the mounting plate, and a connecting seat is mounted below the mounting plate. When a user presses the keys of the keyboard, the buffer mechanism below the keys firstly absorbs part of impact force through the buffer spring. And through the high-elasticity design of the reset springs and the buffer springs, the keyboard keys can still keep good hand feeling and vibration reduction effect after being used for a long time.

The present invention discloses a shock absorber, comprising a connector 1, a connector 2 and a plurality of shock-absorbing wires, wherein the two ends of the shock-absorbing wires are respectively connected to the connector 1 and the connector 2, and the connection of the shock-absorbing wires on the connector 1 forms a connection surface 1, and the connection of the shock-absorbing wires on the connector 2 forms a connection surface 2, and the connection surface 1 is inclined to the connection surface 2. The shock absorber of the present invention realizes multi-dimensional shock absorption of a single element, has a good shock absorption effect, can effectively simplify the vibration isolation mechanism of the aircraft, reduce the required assembly space, improve the compactness of the structure, reduce waste weight, and improve the carrying capacity of the unmanned aerial vehicle.

The application discloses a multi-mode magneto-rheological actuator, which comprises a magneto-rheological damper, a working cylinder and a control cylinder which are connected in parallel, a piston is arranged in the working cylinder, so that the working cylinder is divided into a first working cavity and a second working cavity by the piston; an adjusting valve core is arranged in the control cylinder, so that the control cylinder is divided into a first control cavity and a second control cavity by the adjusting valve core; the first working cavity, the second working cavity, the first control cavity and the second control cavity are filled with magneto-rheological fluid; the first working cavity is communicated with the first control cavity, and the communication flow in the two cavities is controllable; the second working cavity is communicated with the second control cavity, and the communication flow in the two cavities is controllable; the two cavities are filled with magneto-rheological fluid; the magneto-rheological actuator has two working modes, a mode switching switch of active damping and magneto-rheological semi-active damping is formed by a motor and the adjusting valve core, and model selection is actively carried out for different scenes, so that the damping requirements of different application scenes can be met.

The golf swing practice rod comprises a first rod body, a second rod body, a grip and a rod head, external threads are arranged on the periphery of the upper portion of the first rod body, internal threads are arranged on the inner side of the lower portion of the second rod body, and the external threads of the first rod body are connected with the internal threads of the second rod body through a thread structure. A sliding rod is fixedly installed in the middle of the interior of the first rod body, a permanent magnet is slidably installed on the sliding rod, and an electromagnet is fixedly installed above the permanent magnet and in the first rod body. The rod body extends and retracts through threaded connection, and can be used by practicers with different heights; meanwhile, a magnetic attraction device is arranged in the rod body, potential safety hazards are avoided, the magnitude of current can be adjusted through a current regulator according to different requirements of practicers so as to adjust the magnitude of attractive force between the permanent magnet and the electromagnet, the practice difficulty level can be adjusted, the swing posture of the practicers can be corrected, and the swing strength can be exercised; therefore, a better exercise effect is achieved.

The invention discloses a copper-based powder metallurgy friction material containing composite iron powder and a preparation method of the copper-based powder metallurgy friction material. The friction material is prepared from, by weight, 45%-60% of electrolytic copper powder, 10%-20% of the composite iron powder, 10%-15% of granular graphite, 1%-5% of barite, 3%-6% of tungsten oxide, 2%-4% of high-carbon ferrochrome, 2%-4% of silicon dioxide and 1%-2% of porous zirconium carbide ceramic. Compared with the prior art, the friction material has the positive effects that the iron powder prepared by two different processes is added into the friction material, and optimal granularity matching is carried out, so that the strength and the hardness of the material are improved, and meanwhile, the noise generated in the braking process is effectively reduced. According to the invention, the porous zirconium carbide ceramic is added into the friction material, so that the heat resistance of a brake pad can be improved, the stability of a friction coefficient is ensured, and vibration and noise during braking are reduced.

The present invention discloses an assembled floating unit plate and an assembly connection construction method, including a plurality of floating plate unit blocks and a connection structure. The plurality of floating plate unit blocks are arranged in sequence along the extension direction of the track line. The connection structure is arranged between adjacent floating plate unit blocks, so as to connect the plurality of floating plate unit blocks to form a linear floating unit plate extending along a straight line, or to connect the plurality of floating plate unit blocks to form a curved floating unit plate with a curved curvature. Compared with the common prefabricated floating plate in the prior art, the floating unit plate of the present invention is not limited by the construction space and transportation and hoisting, and can be transported and hoisted more conveniently and labor-savingly; it can be connected to form a floating unit plate of any length according to the actual length of the track line, and has a very high flexibility in use, a stable and firm floating unit plate structure, no connection gap between adjacent floating plate unit blocks, very high driving safety, and a very good vibration reduction effect.

The application discloses an oil film damper damping structure, which comprises a bearing, a support seat and an adjusting structure, wherein the bearing comprises a bearing outer ring and a bearing inner ring, the bearing inner ring is suitable for being connected with a rotor; the inner ring of the support seat is coaxially arranged with the bearing outer ring to enclose an oil film cavity suitable for containing lubricating oil; the adjusting structure is fixedly arranged in the oil film cavity, and the adjusting structure is fixed on the bearing outer ring or the inner ring of the support seat; the adjusting structure comprises a flow control part, the flow control part comprises a streamlined surface and a flow resistance plane which are connected with each other, and the streamlined surface and the flow resistance plane are used for controlling the flow speed of the lubricating oil; the friction coefficient of the flow resistance plane is greater than that of the streamlined surface. The structure plays a damping role under the action of the friction resistance and the pressure difference resistance of the lubricating oil on the adjusting structure, the control effect of the oil film extrusion flow is strengthened, and the use and application range of the extrusion oil film damper are increased.

A kind of floating construction floor structure for sound insulation and vibration reduction of machine room equipment, the floating construction floor structure includes concrete floor structure layer, sound insulation and vibration reduction layer, waterproof structure layer, floating construction layer in turn from bottom to top distribution, the periphery of concrete floor structure layer is built with surrounding edge structure to form with vibration reduction floating construction installation area, the inner side of surrounding edge structure is pasted with frame isolation strip, sound insulation and vibration reduction layer is fixed in the vibration reduction floating construction installation area above concrete floor structure layer, waterproof structure layer is fixed above sound insulation and vibration reduction layer, floating construction layer is fixed above waterproof structure layer.The utility model can separate sound insulation and vibration reduction layer from building main body by installing frame isolation strip on one side of surrounding edge structure, so that floating construction floor structure plays the maximum acoustic effect, the lower part of floating construction layer is laid with sound insulation and vibration reduction layer, waterproof structure layer layer, can effectively improve the function of concrete structure floor sound insulation, waterproof, dustproof, effectively reduce the vibration frequency generated when equipment runs.

The application relates to an intelligent variable-damping inertance damping system for offshore wind power, which comprises a wind turbine tower, a plurality of variable-damping rods, a mass block, universal rollers, a data acquisition and control module, sensors and a limiting platform; the limiting platform is fixedly arranged in the wind turbine tower, the mass block is arranged on the limiting platform, the two ends of the variable-damping rod are connected to the inner wall of the wind turbine tower and the outer wall of the mass block respectively, the variable-damping rod comprises a viscous damping chamber 21, a flow rate control chamber 25 and an inertance chamber 28; the sensors are arranged on the inner wall of the wind turbine tower and used for monitoring the vibration condition of the wind turbine tower; the data acquisition and control module is used for collecting the data of the sensors and controlling the magnetic field intensity of the electromagnet in the flow rate control chamber of the variable-damping rod, so as to adjust the rotating speed of the variable-speed water wheel, adjust the liquid flow rate and realize intelligent damping regulation and control.

This utility model provides a support suspension device and a washing machine including the same. The support suspension device includes a first bracket, a second bracket, and an elastic support assembly. The elastic support assembly is made of elastic material and includes: a first vibration isolation support portion having a connected drum end, a vibration isolation support body, and a housing end along the height direction, the vibration isolation support body being supported between the drum end and the housing end; and a second vibration isolation support portion disposed on the drum end and extending from the drum end toward the housing end, the end of the second vibration isolation support portion toward the housing end being configured to move closer to or further away from the housing end relative to the weight of the drum, and to move relative to the housing end in the horizontal plane along the direction of approaching or moving away from the vibration isolation support body. This suspension support device can achieve better vibration isolation and damping effects, reduces the number of parts, has a more compact structure, significantly reduces the space occupied in the housing, and avoids structural noise generated by component operation.

The invention discloses a thermally-induced rigidity-variable high-performance mounting bracket and a control method thereof, relates to the technical field of vibration reduction equipment, and aims to solve the technical problem that an existing vehicle-mounted motor vibration reduction bracket cannot be adaptively adjusted along with temperature change. Through the TiNiNb shape memory alloy pull column, temperature self-adaption rigidity switching, low-temperature rigidity fixing impact resistance and normal-high-temperature flexible vibration reduction are achieved, and vibration characteristics of different temperature ranges of the motor are adapted; the vibration buffering gasket is matched with the air damping mechanism to form double vibration reduction, and the high-frequency broadband vibration attenuation effect is greatly improved through the triple damping effect; the ventilation air bag realizes forced air circulation by means of motor vibration, vibration reduction heat is quickly discharged, and high-temperature vibration reduction stability is guaranteed; the vibration wave mechanism is matched with the one-way shaft ring, vibration is converted into reverse rotation force of the radial vibration buffering ring, eccentric radial vibration force of the rotor is counteracted from the source, and accurate radial vibration reduction is achieved.

The invention belongs to the technical field of polyurethane cushions, and relates to a continuous production method of a polyurethane cushion, and the polyurethane cushion comprises a protective layer, a damping layer and an isolating layer which are arranged in sequence; the vibration reduction layer comprises a vibration reduction area and a filling area which are arranged at an interval; the continuous production method comprises the following steps that the isolating layer is flatly laid below the polyurethane pouring mechanism, and the protective layer is flatly laid above the isolating layer and is a certain distance away from the isolating layer; a polyurethane pouring mechanism pours a first polyurethane foaming material and a second polyurethane foaming material to the isolation layer at the same time, and after pouring, the materials start to be in contact with the protection layer and enter a heating drying tunnel together with the protection layer; after being heated by the heating drying tunnel, the material is cured to form the vibration reduction area and the filling area, the vibration reduction area and the filling area are compounded into an integrated vibration reduction layer, and the isolation layer, the protection layer and the vibration reduction layer are bonded and compounded into an integrated continuous composite polyurethane plate; and the continuous composite polyurethane plate is cut by a cutting device to form the polyurethane cushion pad.

The application discloses a detachable dust-removing and shock-absorbing buffer device containing a high-strength crash-resistant buffer structure, which comprises a bottom layer steel plate and a top plate, a high-strength foam aluminum sandwich layer is installed on the bottom layer steel plate, a top layer steel plate is installed on the high-strength foam aluminum sandwich layer, a spring hydraulic shock-absorbing structure and a center large spring hydraulic shock-absorbing structure are arranged on the top layer steel plate, the upper ends of the spring hydraulic shock-absorbing structure and the center large spring hydraulic shock-absorbing structure are connected to the bottom of the top plate, and a crash-resistant buffer structure is further arranged between the top layer steel plate and the bottom layer steel plate, and the device has a better shock-absorbing effect.

The invention provides a vibration reduction lifting device, and relates to the field of optical equipment, the vibration reduction lifting device is used for bearing the optical equipment, the vibration reduction lifting device comprises a lifting platform, the lifting platform is provided with a bearing surface, and the bearing surface is used for bearing the optical equipment; the lifting assembly is connected with the lifting table and used for driving the lifting table to do lifting motion; the damping device is located between the lifting table and the lifting assembly and is connected with the lifting table and the lifting assembly; the lifting platform is further provided with installation structures fixed to the bearing face, the installation structures are located above the bearing face, the multiple installation structures are arranged at intervals, and each installation structure is at least connected with one vibration reduction device so that the rigid center of each vibration reduction device can coincide with the mass center of the optical equipment and the overall mass center of the lifting platform. The vibration reduction lifting device has better vibration reduction capacity.

This invention provides a rubber-coated metal material that exhibits excellent hot water resistance and vibration damping properties even when an adhesive layer and a rubber layer are formed on a metal substrate using an aqueous dispersion of an adhesive (adhesive aqueous dispersion) and an aqueous dispersion of rubber, respectively. The rubber-coated metal material is a rubber-coated metal material in which an adhesive layer and a rubber layer are sequentially disposed on a metal substrate. The adhesive layer is characterized by containing an adhesive and a compound having hydrophilic groups, and the rubber layer contains rubber, a surfactant, and a plate-like filler.

The utility model relates to pelletizer technical field, concretely relates to no heating environmental protection pelletizer, including support, one side bottom of support fixed with power structure, the output side of power structure is externally provided with extrusion structure, the end of extrusion structure is fixed with extrusion plate structure, including extrusion cylinder and the tail plate fixed in the extrusion structure in extrusion structure outside, including the outer plate and locking bolt fixed in the outer plate inside in extrusion plate structure, the outer plate is fixed in the tail plate outside through locking bolt, the inner groove of outer plate inside and the extrusion hole design of middle part, the structure that sets up in the inner groove in combination fastening ring, make the compact reasonable layout of the component of drive shaft end, the multiple groups of fan -shaped hole structure in the middle part of fastening ring, cooperate the cutting piece of same length with the inner groove radius, when drive shaft drives cutting piece rotation, can accurate, efficient cutting to the material that extrudes from extrusion hole, guarantee the even and consistent of the size after cutting, improved the quality of granulation.

This invention provides a vibration damping component and its manufacturing method for an electronic device, as well as an electronic device and a back cover assembly for the electronic device. The vibration damping component of the electronic device comprises, from the inside out, a zeolite porous layer and a viscoelastic polymer barrier layer. The zeolite porous layer includes a viscoelastic polymer matrix and zeolite powder dispersed within the viscoelastic polymer matrix, and the zeolite porous layer contains large pores. The vibration damping component of the electronic device provided by this invention combines viscoelastic polymer material and zeolite powder, and when placed in the gap between the back cover and the electronic device substrate, it not only achieves excellent vibration reduction, almost eliminating shell vibration of the electronic device, but also significantly improves the low-frequency acoustic performance.

The utility model relates to the technical field of buildings, in particular to a wind and rain vibration resistant inhaul cable which is provided with an inner layer and a water blocking surface layer, and the water blocking surface layer forms a continuous groove or protrusion structure through a main steel wire and an auxiliary steel wire which are different in radial thickness, so that a forming path of a water film on the surface of the inhaul cable is effectively damaged. The aerodynamic force on the surface of the inhaul cable is stabilized, so that wind and rain vibration is avoided, the vibration reduction effect is good, and the service life of the inhaul cable of the cable-stayed structure is prolonged; compared with a vibration reduction mode of a traditional damper, the vibration reduction device has the remarkable advantages of being simple in structure, free of maintenance and long in service life, and a brand new solution is provided for the wind and rain vibration resistance design of the large bridge inhaul cable. Wherein the main steel wires and the auxiliary steel wires are Z-shaped section steel wires, so that mutual lap joint is facilitated, and the integrity and the structural strength of the water-blocking surface layer are ensured. And the inner layer adopts a composite structure of the bearing core layer and the transition reinforcing layer, so that a stable mounting foundation is provided for the water-blocking surface layer while the mechanical property of the inhaul cable is ensured.

This invention discloses a locally resonant phonon crystal unit cell, a vibration reduction structure, and an installation method, belonging to the field of track vibration reduction technology. The locally resonant phonon crystal unit cell includes a silicone rubber matrix as the outer ring, with a steel scatterer disposed within the cavity of the silicone rubber matrix. The steel scatterer and the silicone rubber matrix are connected and fixed by a soft material encapsulation layer. Four spring-mass subsystems are nested within the steel scatterer. The inner cavity sidewalls of the silicone rubber matrix are also encapsulated with a soft material. Using the locally resonant phonon crystal unit cell, vibration reduction structure, and installation method described in this invention can solve the problem of poor vibration reduction effect of existing vibration reduction measures for low-frequency vibrations.

The damping vibration and noise reduction type steel bar truss composite floor comprises a prefabricated bottom plate, and a plurality of supporting units are arranged in the prefabricated bottom plate in an array mode; a damping vibration attenuation device is arranged in each supporting unit, so that the composite floor forms a periodic composite structure. Compared with other common floor slabs, the damping floor slab has better damping capacity, a damping device is installed on the middle layer, energy is dissipated through rolling of rolling mass balls and mutual friction between the rolling mass balls, meanwhile, the tuning purpose can be achieved by adjusting the sizes of the rolling mass balls, the size of a sliding face and materials, and the damping floor slab is suitable for large-scale popularization and application. The structure has good vibration and noise reduction capability; meanwhile, the top layer forms a periodic composite structure through the scattering units, the reinforcing mesh, the concrete layer and the like, the forbidden band frequency range of the structure is controlled by adjusting a structure array according to the Bragg scattering mechanism, transmission of vibration in the structure is controlled, and therefore the anti-vibration capacity of the structure is improved.

The invention relates to the field of vehicle dynamics and damping control, discloses a novel electromagnetic air damping shock absorber, is applied to an automobile suspension system, aims to provide a shock absorber capable of adjusting damping force in real time, and comprises a sleeve, a guide rail rod, a Halbach permanent magnet array, an electromagnetic coil, a buffer conductor cylinder, a small wafer, a sealing ring and a guide sliding block. The guide rail rod is located in the center of the sleeve and is kept coaxial with the sleeve. The two sides of the sleeve are provided with five throttle holes, and the buffer conductor cylinder is sleeved on the guide rail rod and is sealed by a sealing ring. The guide slide block is in close contact with the buffer conductor cylinder, the Halbach permanent magnet array and the electromagnetic coil are respectively embedded and wound on the guide rail rod, and the small wafers are embedded at two ends of the guide rail rod and are adjacent to the Halbach permanent magnet array. According to the design, the active characteristic of electromagnetic damping and the passive characteristic of air damping are integrated, dependence on an external power source is reduced, the overall performance and reliability of the shock absorber are improved, and the riding comfort and the driving safety are remarkably improved.

This invention belongs to the field of marine engineering and structural vibration control technology, and discloses a ball-bearing supported bidirectional active-passive tuned mass damper, which is composed of two arc-shaped tuned mass dampers with perpendicular motion directions. The inertial mass is supported on an arc-shaped base by a ball bearing assembly, cleverly converting sliding friction into low-resistance rolling friction, making the damper more sensitive to start, while maintaining a compact structure. In terms of passive control, the device dissipates energy through electromagnetic damping generated by the relative motion between the magnet assembly and the conductor plate. The integrated active control system, composed of a drive coil and a magnet assembly, can apply additional active control force to the TMD, thereby upgrading the traditional passive TMD to a higher-performance active-passive hybrid system, enhancing its adaptability and robustness to complex loads. In addition, the device adopts a non-contact electromagnetic guidance design, utilizing a figure-eight coil assembly in conjunction with a lateral magnet assembly to eliminate the friction of traditional mechanical guidance mechanisms.

The utility model provides a kind of support suspension device and the washing machine comprising it, support suspension device includes first support, second support and elastic support component, elastic support component is made of elastic material, including: upper vibration isolation support part, the second end of connecting first support along circumferential direction;Lower vibration isolation support part, the second end of connecting second support;And left vibration isolation support part and right vibration isolation support part, all extend along up-down direction and are connected between upper vibration isolation support part and lower vibration isolation support part respectively.The left vibration isolation support part and right vibration isolation support part have bending part along extension direction.The lower vibration isolation support part is configured to be able to change with the gravity of cylinder, relative to upper vibration isolation support part in left-right direction close or away.This suspension support device can achieve better vibration isolation and damping effect, reduce the number of parts, structure is more compact, significantly reduce the occupation of box space, and avoid the structure noise generated by component operation.

The invention relates to a large thin-wall workpiece turning vibration reduction tool which comprises a fixed vibration reduction mechanism and a fixed vibration reduction mechanism, the fixed vibration reduction mechanism comprises a plurality of vibration reduction rings, the inner sides of the vibration reduction rings are connected with vibration reduction structures, the vibration reduction rings are arranged outside a machined workpiece in a surrounding mode and connected with a lathe faceplate, and the vibration reduction structures provide damping force for workpiece vibration; the movable vibration reduction mechanism comprises a connecting base, a vibration reduction plate and a vibration reduction assembly, the vibration reduction plate can move relative to the connecting base in the first direction, the vibration reduction assembly comprises a displacement amplification structure and a damper, the displacement amplification structure is connected with the vibration reduction plate and the damper, and the displacement of the vibration reduction plate is amplified and input into the damper; the vibration reduction plate is attached to the outer wall or the inner wall of the turning position of the machined workpiece, the first direction is parallel to a first straight line which passes through a cutting point and perpendicularly intersects with the axis of the machined workpiece, and the connecting base is fixed relative to the machined workpiece in the first direction. Vibration in the workpiece machining process can be reduced, machining can be conducted under high machining technological parameters, and high quality and high efficiency of workpiece machining are guaranteed.

The present application provides a multi-directional displacement vibration-damping spring support and hanger, in which two suspension mechanisms are respectively installed at the two ends of a first bearing assembly. The first universal joint is installed on the ceiling, the second universal joint is installed on the first bearing assembly, the first suspension assembly is installed on the first universal joint, the second suspension assembly is installed on the second universal joint, and is passed through the first suspension assembly, multiple first elastic assemblies are installed on the first suspension assembly, and are supported on the outer periphery of the second suspension assembly, and the second elastic assembly is installed on the second suspension assembly, and is supported between the first suspension assembly and the second suspension assembly. The multi-directional displacement vibration-damping spring support and hanger provided by the present application can reduce vibration from different directions, prevent vibration from being transmitted to the first suspension assembly and causing damage to the multi-directional displacement vibration-damping spring support and hanger, and has a good vibration reduction effect, which helps to improve the structural stability of the multi-directional displacement vibration-damping spring support and hanger during use, is not easy to fall off, and helps to extend the service life of the multi-directional displacement vibration-damping spring support and hanger.

The invention discloses a marine flexible connecting pipe with a double-layer flexible pipe body structure, which comprises an inner-layer rubber flexible pipe, an outer-layer metal corrugated pipe, a sealing flange, a locking flange and a fastening ring, and is characterized in that the inner-layer rubber flexible pipe is arranged in the outer-layer metal corrugated pipe in a penetrating manner; the two sealing flanges are arranged on the outer sides of the end portions of the two ends of the inner-layer rubber flexible pipe respectively, and the two locking flanges are arranged on the outer sides of the end portions of the two ends of the outer-layer metal corrugated pipe respectively and connected with the end portions of the two ends of the inner-layer rubber flexible pipe and the end portions of the two ends of the outer-layer metal corrugated pipe respectively. The number of the fastening rings is two, and the fastening rings are arranged on the inner sides of the two ends of the inner-layer rubber flexible pipe respectively and correspondingly clamped between the sealing flange and the locking flange which are arranged at the same end. The invention has the advantages that: the safety is high, and the service life is long; the damping effect is good; connection is simple and reliable, and maintenance is convenient; the size is small, and optimized space application of a pipeline system is facilitated.

The application discloses a cab suspension damping device, a sound quality improving method and system and engineering machinery. The cab suspension damping device comprises a base connected with a vehicle frame, a top plate connected with a cab bottom plate, and an intermediate platform located between the base and the top plate. The intermediate platform is connected with the top plate through a plurality of magnetorheological dampers. The intermediate platform is connected with the base through a limiting damping assembly and a plurality of variable stiffness springs. The cab suspension damping device has simple structure, good damping effect, and is easy to install and maintain. Meanwhile, the rigidity and damping of the cab suspension damping device can be adjusted in real time, the sound quality of the cab is improved, and the driving comfort and the accuracy of the driver's conversation are improved.

The application discloses an adjustable collision acoustic black hole periodic damping shock absorbing device, comprising a plurality of identical damping shock absorbing units arranged periodically on the surface of a structure to be damped; the damping shock absorbing unit comprises a U-shaped cavity wall and a mass block-acoustic black hole beam combined structure arranged in the U-shaped cavity wall; the adjustable collision acoustic black hole periodic damping shock absorbing device has periodicity in the direction perpendicular to the U-shaped cavity wall; the U-shaped cavity wall comprises an upper cavity and a top ventilation hole arranged at the top end of the upper cavity; the mass block-acoustic black hole beam combined structure comprises an acoustic black hole beam, a mass block and a cavity perpendicular to the structure to be damped; the end of the acoustic black hole beam is provided with a damping layer, the mass block moves up and down in the cavity, collides with the acoustic black hole beam arranged below to transfer vibration energy and is absorbed and dissipated by the damping layer. The application realizes a broadband damping effect by arranging the damping shock absorbing units periodically on the surface of the structure to be damped.

This invention relates to a vibration-damping boring bar and boring machine based on an acoustic black hole, comprising a tool bar with a tool head fixed at one end, a sleeve sleeved at a predetermined position on the tool bar, at least one vibration-damping block fixed on the sleeve, and a cavity inside the vibration-damping block, within which a wedge-shaped tapering vibration-damping component is provided. Along the direction away from the tool head, the thickness of the vibration-damping component gradually decreases to form an acoustic black hole structure. The boring bar of this invention has a simple structure, generates low noise, and has a wide applicable frequency range and strong applicability.

The present application relates to the technical field of damping device, and provides a ship damping structure, which comprises a plurality of lattice units, each of which comprises a polyhedral lattice structure and an internal lattice structure; the internal lattice structure is arranged in the interior of the polyhedral lattice structure and is connected with each vertex of the polyhedral lattice structure respectively; the lattice unit is isotropic; and the plurality of lattice units are arranged in an array and are connected with each other. The ship damping structure of the present application is composed of a plurality of lattice units connected with each other, each of which is composed of a polyhedral lattice structure and an internal lattice structure in the interior of the polyhedral lattice structure. By reasonably designing the structures of the polyhedral lattice structure and the internal lattice structure, the lattice unit can be isotropic. The plurality of lattice units are arranged in an array and are connected with each other, so that an isotropic ship damping structure can be formed. When the ship damping structure bears vibration impact, the damping performance of the ship damping structure in each direction is basically consistent or similar, and the damping effect is better.