59results about How to "Improve vibration damping ability" patented technology

The invention provides a damping type buffering device for underwater entry of a navigation body. The damping type buffering device comprises a fairing, a buffering device body and an electromagnet device, wherein the head of the fairing is sealed, and the tail of the fairing is detachably connected with the outer wall of the head of a main elastic body; the buffering device body is arranged in the fairing, located between the head of the fairing and the head of the main elastic body and used for buffering the acting force between the main elastic body and the fairing after the main elastic body enters water; and the electromagnet device is installed in the head of the main elastic body and used for attracting the buffering device body. The damping type buffering device is used for head load reduction in the air-drop or medium-high-speed launching underwater entry process of the navigation body and can be suitable for the buffering load reduction purpose of vertical or large-angle inclined underwater entry of the navigation body at the speed of 20m/s to 100m/s. The damping type buffering device is simple in structure and convenient to implement and install, and different hydraulicdampers can be adjusted or replaced according to actual working conditions and requirements to achieve the load reduction purpose of different degrees.

The invention discloses a shock-insulation and vibration-reduction table and a construction method thereof. The shock-insulation and vibration-reduction table comprises a base and shock isolators, wherein vibration reduction supports are arranged on the base. Grooves for storing the vibration reduction supports are formed in the base. Each vibration reduction support is provided with troughs used for storing the corresponding shock isolator, and the troughs of each vibration reduction support are composed of grooves in the horizontal direction and a groove in the vertical direction. The vibration reduction supports are made of high-damping polymers. The shock isolators are extrusion type friction-pendulum vibration isolators. The shock-insulation and vibration-reduction table has vibration reduction and shock insulation functions at the same time, not only can the horizontal earthquake effect be lowered, but also the vertical earthquake effect can be lowered.

The invention discloses a magnetorheological elastomer shock absorber which comprises a shock abosrbing rod, an inner sleeve and a base, wherein the shock absorbing rod, the inner sleeve and the base are connected together in the axial direction. The shock absorbing rod extends into the inner sleeve. A piezoelectric module and a shock absorption module are axially arranged between the portion, in the inner sleeve, of the shock absorbing rod and the base. The shock absorption module is mainly composed of an upper permanent magnet, an upper magnetorheological elastomer, a ferromagnet, a lower magnetorheological elastomer and a lower permanent magnet which are arranged together in the axial direction. A coil is arranged on the periphery of the ferromagnet. The two ends of the coil are connected with the piezoelectric module correspondingly. The magnetorheological elastomer shock absorber is compact in structure and high in shock absorption property.

The invention discloses a packing box capable of achieving damping vibration attenuation. The box comprises an outer box body and an inner box body which is arranged inside the outer box body and used for storing articles, a vibration attenuation device used for conducting longitudinal vibration attenuation on the inner box body is arranged between the bottom wall of the outer box body and the bottom wall of the inner box body, and the vibration attenuation device comprises a pressing plate, a compression bar, a sleeve, a piston, a spring base plate, a vibration attenuation rubber body and vibration attenuation springs; by arranging the vibration attenuation device for conducting longitudinal vibration attenuation on the inner box body, when the inner box body is subjected to longitudinal oscillation, the vibration attenuation springs and the damping piston work together to generate buffering damping force under the action of the pressing plate and the compression bar, the damping strength is high, when the action of the vibration attenuation springs and the damping piston is ended, and the vibration attenuation rubber body conducts damping vibration attenuation, in other words, the vibration attenuation device of the structure is provided with multilevel vibration attenuation. According to the packing box, the vibration attenuation effect is powerful and good, in the transportation process, the packing box can resist against vibration caused by bumpiness of road conditions, safety of the articles in the transportation process is guaranteed, and the articles are prevented from being damaged.

The invention discloses a self-adaptive inverse vibration isolation control method for a super-magnetostrictive vibration isolation platform. The self-adaptive inverse vibration isolation control method comprises the following steps that S1, a Filtered-epsilon LMS self-adaptive inverse controller is adopted to control a super-magnetostrictive actuator to output isolation vibration. The method utilizes a nonlinear adaptive filter and adopts the self-adaptive inverse controller adopting Filtered-epsilon LMS algorithm structure design, the size of vibration signals of the super-magnetostrictive actuator is estimated, then the Filtered-epsilon LMS self-adaptive inverse controller is adopted to control the super-magnetostrictive actuator to output isolation vibration, and accordingly the vibration isolation control precision and stability of the super-magnetostrictive vibration isolation platform are improved.

The invention relates to a laundry treating apparatus which includes a cabinet, a drum accommodated in the cabinet, a tub accommodating the drum, and a dynamic absorber provided to absorb oscillationof the cabinet. The dynamic absorber includes a support plate coupled to the cabinet, mass bodies movably provided on the support plate, and sliders arranged between the mass bodies and the support plate, and the sliders can enable the mass bodies to perform reciprocating motion on the support plate while attenuating due to frictional force.

The invention relates to a semi-active temperature control vibration reduction device and method based on shape memory alloy. The semi-active temperature control vibration reduction device comprises amass block, wherein the mass block can move in a set plane, the mass block is connected with a rigid rod through a connecting mechanism, an end of the rigid rod extends into a temperature control box, an end plate is fixed to the end of the rigid rod, the end plate is fixedly connected with one end of a spring, the other end of the spring is fixedly connected with the box wall of the temperaturecontrol box, the mass block can drive the end plate to move in the temperature control box through the connecting mechanism and the rigid rod, the spring is made of the shape memory alloy, and a temperature control device is arranged in the temperature control box and is used for controlling the temperature in the temperature control box. According to the vibration reduction device, variable-rigidity intelligent vibration reduction and broadband vibration reduction can be realized.

The invention discloses an energy consumption spherical support base comprising a spherical support base body which can slide unidirectionally and a damping wall arranged on the spherical support base body. The spherical support base body comprises a lower support base plate, a middle main body arranged on the lower support base plate and an upper support base plate arranged on the middle main body. The bottom face of the damping wall is fixed to the top face of the lower support base plate. The upper end of the damping wall is fixedly connected with the middle main body. The energy consumption spherical support base has strong vertical bearing capacity, also has strong capacity of horizontal energy consumption and the excellent damping effect; unidirectional horizontal sliding of the spherical support base is achieved, meanwhile the certain rotating function, strong tensile capacity and insensitivity to the temperature are achieved, and reducing of structure responding can be achieved in a wide frequency domain range; and the damping wall of the energy consumption spherical support base is simple in structure, has the low requirement for sealing performance and is convenient to install and low in cost.

The invention discloses a TLMD vibration isolation system. The system comprises a TLD and multiple TMDs, and each TMD comprises a mass block, a first spring, a second spring, a third spring and liquid; the TLD also comprises liquid and a liquid storage box, and operation steps comprise that before parameters of all parts of the TMDs are selected, the main frequency and external excitation frequency spectrum characteristics of a needed vibration isolation structure are measured, through the vibration isolation need, the modal mass ratio of the TMD and a main structure is determined, and the selection range is 1 to 5%; according to the vibration isolation frequency range determined in S1 and the corresponding mass value, the TMD swing rod length and the spring rigidity are designed, and theTMDs are symmetrically arranged relative to a main structure. The vibration frequency of the mass blocks of the multiple TMDs is adjusted according to the outer motivation, the broadband vibration isolation is achieved, TLD liquid serves as TMD damping liquid, meanwhile, the TLD liquid can vibrate, and through shaking and collision with the wall of the liquid storage box, vibration isolation is achieved.

The invention relates to the loudspeaker box system technology field and especially relates to a vibration reduction loudspeaker box system. A loudspeaker box body in the vibration reduction loudspeaker box system adopts an electromagnet to suspend a loudspeaker. A foot stand adopts a hollow column which is filled with a cast iron powder. And a top panel is made of a vibration reduction plate. The column, the top panel and a bottom panel are connected and fixed through spot welding. By using the loudspeaker box system, vibration is small and sound quality is good.

The invention discloses a ground barrier vibration damping device, and relates to the technical field of vibration isolation buildings. The device comprises a vibration damping plate, a particle layer, a water bag layer, a friction layer and a high damping plate, wherein a layer of powdery solid particles is laid in the vibration damping plate to form the particle layer, the water bag layer is arranged between the vibration damping plate and the friction layer, the water bag layer comprises a plurality of closely arranged water bags, the high damping plate is fixedly connected to the side, away from the water bag layer, of the friction layer, and the friction layer and the water bag layer can be mutually rubbed. According to the device, vibration near the foundation can be efficiently reduced.

The invention relates to the technical field of sound systems, specifically to a vibration-reducing loudspeaker box system. A loudspeaker box main body in the vibration-reducing loudspeaker box system adopts electromagnets to suspend a loudspeaker, and a foot stool is a hollow stand column filled with cast iron powder, and vibration reducing legs are arranged at the bottom of the foot stool. The loudspeaker box system is relative small in vibration, and better in tone quality while producing sound.

The invention discloses a gradient pressure-torsion energy storage and vibration reduction structure. The structure is characterized in that a plurality of pressure-torsion unit cells can rotate the load direction when being subjected to load, the pressure-torsion unit cells are arranged to form a layer of energy storage and vibration reduction unit in an array, and a plurality of layers of energy storage and vibration reduction units are sequentially overlapped to form the gradient pressure-torsion energy storage and vibration reduction structure; each pressure-torsion unit cell sequentially comprises an upper face plate, a plurality of pressure-torsion structures, a lower face plate and a bottom plate from top to bottom, and the pressure-torsion structures are arranged between the upper face plates and the lower face plates in an overlapped mode. Impact energy is converted into structure rotation energy and counterweight rotation energy, the energy absorption efficiency of a traditional structure is greatly improved, meanwhile, the structure can further absorb the rotation energy through a transmission means in the rotation process, the structure is high in designability, and the rigidity and the strength of the structure can be improved by increasing the number of inclined rods of the unit cells, so that the structure has a wider application space.

The invention relates to a high-damping rubber material with high vibration attenuation performance. The material is prepared from 100 parts of brominated butyl rubber, 40-60 parts of a reinforcing agent, 20-60 parts of a filling agent, 10-30 parts of a plasticizer, 1-3 parts of an acid-base regulator, 1-3 parts of a release agent, 2-6 parts of an anti-aging agent RD, 10-40 parts of a Tg regulator, 2-10 parts of an activating agent, 1-2 parts of an activating aid and 4-16 parts of a vulcanizing agent. By replacing the main rubber, the carbon black, the Tg regulator, the vulcanization system and the like, the loss factor of the high-damping rubber material is high (greater than 1.0), and the vibration attenuation capacity is high; through the Tg regulator, the loss factor peak value of thematerial becomes greater, and meanwhile, the peak value also falls within the use temperature range; the vulcanization system enables long cross-linking bonds to be formed among molecular chains so asto increase displacement of forced movement of the molecular chains, so that the loss factor of the material is increased; in addition, the brominated butyl main rubber and the superfine carbon blackcan overcome greater inherent internal friction when the molecular chain of the rubber is displaced, so that the loss factor of the material is improved.

The invention discloses a thrust converting device of a pulse detonation engine, comprising an aircraft mount, a spring cavity, a linear viscous damper, an engine mount, a parallel spring and a seriesspring; the thrust converting device comprises an aircraft mount, a spring cavity, a linear viscous damper, an engine mount, a parallel spring and a series spring. The thrust conversion device is connected with the aircraft and the pulse detonation engine through an aircraft mount and an engine mount. The linear viscous damper is designed as a symmetrical double-output rod clearance damper, so that the damping property thereof does not change with the change of the motion direction, and is convenient to control. Adopting the structure design of two springs mounted side by side not only improves its ability to isolate high frequency, periodic, pulse-type and large peak-to-peak thrust, but also reduces the axial displacement of the engine. Pulse detonation engine produces periodic, pulsed,large peak-to-peak thrust transfer to the engine mount, through the spring storage energy, damper energy consumption, and ultimately converted into a small fluctuation of the quasi-steady force, through the mount transfer to the aircraft.

The invention discloses a multi-suspension external connection system on an electric automobile, which comprises a frame and a suspension connecting device, wherein the frame comprises a rear cross beam, a left longitudinal beam, a right longitudinal beam, a short longitudinal beam and three cross beams which are connected with one another; the suspension connecting device comprises a left connecting unit, a right connecting unit and a rear connecting unit; the part, which is clamped between the first cross beam and the second cross beam, of the short longitudinal beam is connected with the top end of the left connecting unit; the part, which is clamped between the first cross beam and the second cross beam, of the right longitudinal beam is connected with the top end of the right connecting unit; the part, which is clamped between the right longitudinal beam and the short longitudinal beam, of the third cross beam is connected with the top end of the rear connecting unit; and the bottom ends of the left connecting unit, the right connecting unit and the rear connecting unit are each provided with a pipe penetrating shaft to be connected with corresponding damping modules on left,middle and rear suspensions. According to the design, the assembling difficulty is low, the assembling efficiency is high, the manufacturing cost is low, and the vibration reduction effect is good.