31results about How to "Lower natural frequency" patented technology

The invention discloses a rigidity-adaptive three-degree-of-freedom low-frequency electromagnetic vibration isolator, and belongs to the technical field of precise vibration isolation. The rigidity-adaptive three-degree-of-freedom low-frequency electromagnetic vibration isolator comprises three sets of low-frequency electromagnetic vibration isolators formed by connecting rigidity-adaptive electromagnetic arrays and spiral springs in parallel. The spiral spring stably supports the load in a passive mode and effectively isolates vibration of middle and high frequency bands; the rigidity self-adaptive electromagnetic array generates high negative rigidity through a moving magnetic array and a fixed magnetic array which are composed of four columns of vertically magnetized equal-cross-section cubic permanent magnets, coil current is adjusted in real time through acceleration feedback, external excitation and load mass changes are responded, the negative rigidity is dynamically adjusted, and the requirement for three-degree-of-freedom near-full-band vibration isolation is met. The vibration isolator has adjustable low dynamic rigidity in the vertical and horizontal rotation freedom degrees, the vibration isolation frequency is low, the frequency band is wide, a super-quiet environment is provided for tip equipment, and the instrument precision is remarkably improved.

The invention discloses an active and passive composite vibration reduction system, and particularly relates to the technical field of vibration reduction equipment, the active and passive composite vibration reduction system comprises a bottom shell, a load platform, a passive vibration reduction device and an active vibration reduction device, and the passive vibration reduction device and the active vibration reduction device are both arranged between the bottom shell and the load platform; the passive damping device comprises a positive stiffness mechanism and a negative stiffness mechanism which are arranged in parallel; the active damping device comprises a controller, a sensor, a piezoelectric actuator and a flat plate type voice coil motor, the sensor is fixed on the load platform, the sensor, the piezoelectric actuator and the flat plate type voice coil motor are all in signal connection with the controller, and the controller processes signals transmitted by the sensor and transmits commands to the piezoelectric actuator and the flat plate type voice coil motor. The method has higher control precision, stronger anti-interference capability and more excellent adaptability and flexibility, the inherent frequency and the formant peak value of the damping device are effectively reduced, the high attenuation of high-frequency vibration is ensured, and broadband vibration attenuation is realized.

The present invention specifically relates to a fan base, the stiffness of which is improved by diagnosing the faults existing in the existing fan base according to the modal vibration data of the model; a wire rope isolator is provided on the fan base. The fan base provided by the present invention effectively isolates and reduces the vibration of the fan, and improves the reliability of the fan operation.

The utility model relates to the technical field of building components, and discloses a metal shock insulation support with multiple shock insulation and adjustable fire prevention and shock absorption, which structurally comprises a connecting plate, embedded ribs, a shock insulation part and a shock absorption part, and has the beneficial effects that vertical vibration force borne by a building is subjected to multiple shock insulation through a vertical shock insulation cylinder and a rubber shock insulation cylinder; and meanwhile, by means of rotating displacement in the opposite directions between the connecting rods and the rotating rods, the buffering air bags are extruded to generate friction buffering energy consumption, transmission of energy from the lower portion to the upper portion can be reduced, deformation of a building structure can be reduced, and due to the fact that the energy consumption devices are distributed on the periphery of the vertical vibration isolation barrel, the stability of the vibration isolation part can be improved.

The utility model discloses a rubber shock absorber. The rubber shock absorber comprises a mounting seat, a rubber shock absorption body and a metal piece, the rubber damping body is fixed on the mounting seat, and a plurality of mounting holes are formed in the mounting seat; and the metal piece is partially embedded into the rubber vibration reduction body along the central axis. By improving the structural design combination between the rubber part and the metal part, the vibration reduction structure which is convenient to install and good in vibration reduction effect is formed; the rubber shock absorber can effectively prevent metal parts from being rusted, has the advantages of low inherent frequency, moderate damping ratio and high transverse rigidity, is low in dynamic coefficient, good in vibration isolation effect, small in size, stable in performance and the like, and is particularly suitable for shock absorption installation of mechanical equipment such as fans, water pumps, engines and air compressors. The shock absorber has a remarkable shock absorption effect on equipment which is shocked and vibrated.

The present invention relates to the field of rail transit technology, and discloses a vibration-damping prefabricated track structure with unloadable support and a construction method, wherein the structure includes a grouting layer, a vibration-damping cushion layer and a prefabricated track plate in order from bottom to top; the vibration-damping cushion layer is arranged between the prefabricated track plate and the grouting layer; the grouting layer is made of a self-compacting concrete material with good fluidity, and the grouting layer is used to support the prefabricated track structure; the vibration-damping cushion layer and the prefabricated track plate are composited into one body, and the vibration-damping cushion layer is arranged under the prefabricated track plate for vibration reduction; two prefabricated plate reserved guide grooves that can be engaged with wedge-shaped support blocks are provided on both sides of the prefabricated track plate, and before the grouting layer is formed, the wedge-shaped support block is used to support the vibration-damping cushion layer and the prefabricated track plate, and after the grouting layer is formed, the wedge-shaped support block is unloaded internally, and the support of the wedge-shaped support block to the vibration-damping cushion layer and the prefabricated track plate is cancelled, so as to achieve contact between the vibration-damping cushion layer and the grouting layer. The vibration-damping prefabricated track structure of the present invention has a good vibration reduction effect.

This invention relates to the field of blade processing equipment technology, and more particularly to a multi-axis rotary polishing machine tool for processing steam turbine blades, comprising: a frame, a grinding wheel base, a mounting shaft, and a clamping seat; the mounting shaft is rotatably connected to the frame; the clamping seat is rotatably connected to the mounting shaft; the grinding wheel base is connected to the frame; the support mechanism can clamp the blade and perform polishing on the blade's fluttering parts, thereby increasing the stiffness of the blade at the clamped part, and thus increasing the blade's natural frequency and eliminating flutter; this invention improves the stiffness of the polished part of the blade edge by clamping the clamping shaft on both sides of the thinner part of the blade edge during polishing, thereby increasing the natural frequency of that part of the blade, so that the natural frequency of the blade at the polished part is offset from the high-frequency vibration frequency generated by the rapid rotation of the grinding wheel base during polishing, thereby reducing the occurrence of flutter during polishing.

This application belongs to the field of valve technology, specifically relating to a pressure reducing valve and a fuel cell vehicle. The pressure reducing valve includes an inlet connector and a gas outlet; a primary pressure reducing assembly includes a primary pressure reducing valve body and a primary pressure reducing component, the primary pressure reducing component being inserted into the primary pressure reducing valve body. The primary pressure reducing component includes a primary pressure reducing section, with the gas outlet portion of the inlet connector inserted into the primary pressure reducing valve body, and the primary pressure reducing section and the gas outlet being positioned opposite each other. In a first direction, the cross-sectional area of ​​the primary pressure reducing section gradually decreases in a second direction, and the first direction intersects the second direction. This solution, through the primary pressure reducing section, can reduce the noise generated during gas pressure reduction, improving the vehicle's noise, vibration, and acoustic roughness characteristics.

The invention provides a negative stiffness adjustable vertical vibration isolation device based on quasi-zero stiffness characteristics, and relates to the technical field of vibration isolation devices. Comprising a bottom plate, a positive stiffness unit and a negative stiffness unit, and the positive stiffness unit comprises a positive stiffness spring and a positive stiffness spring cover plate; the negative stiffness unit comprises a first pressed spring piece, a second pressed spring piece, a third pressed spring piece and a fourth pressed spring piece; a first center plate is arranged between the first pressed spring piece and the second pressed spring piece; a second center plate is arranged between the third pressed spring piece and the fourth pressed spring piece; the first pressed spring piece, the second pressed spring piece, the third pressed spring piece, the fourth pressed spring piece, the first center plate, the second center plate and the positive stiffness spring cover plate are stacked in the vertical direction. Vibration transmission between an object and the base can be effectively reduced, the size of the device is reduced, the vibration isolation performance is not affected, compact design is achieved, and the requirements of some special vibration reduction systems are met.

The present invention relates to the field of fluid control, and specifically to a diaphragm structure and a low-noise air leakage valve. A diaphragm structure comprises a diaphragm body, on which a mass block is arranged. A low-noise air leakage valve comprises a valve housing, in which a diaphragm structure is built, and the diaphragm structure divides the inner cavity of the valve housing into an air inlet side and an air outlet side. An air flow channel is arranged on the diaphragm body, and a one-way cut-off structure for controlling the air flow interruption of the air flow channel is also included. When the air pressure on the air inlet side is greater than the air pressure on the air outlet side, the one-way cut-off structure controls the air flow on the air inlet side to flow to the air outlet side through the air flow channel. By arranging a mass block on the diaphragm body, the natural frequency of the diaphragm structure is reduced, and the higher frequency self-excited resonance is eliminated, so as to achieve the effect of not generating sharp whistling; the lower frequency self-excited resonance is changed to a self-excited resonance with a frequency lower than 20Hz, so as to achieve the effect of not generating audible noise.

The application provides a kind of stator core and motor.The stator core includes: first punching unit, the first punching unit includes first tooth part and first yoke part, one connecting joint is formed at the two ends of the first yoke part respectively, and the first punching unit is a symmetrical structure about the center line of the first tooth part;Second punching unit, the second punching unit includes second tooth part and second yoke part, and the second punching unit is a symmetrical structure about the center line of the second tooth part;Multiple first punching units and second punching units are arranged, multiple first punching units and second punching units are staggered and stacked, and two connecting joints axially adjacent can be rotatably connected to form a chain structure, and the chain structure is connected at the head to form the stator core.The application can reduce resonance and noise problems when the motor is running.

The invention discloses a magnetic coupling type bimodal piezoelectric energy collecting device. The device is composed of a base, a piezoelectric cantilever beam, a mass block and a permanent magnet. Each piezoelectric cantilever beam comprises two piezoelectric patches and is connected with an external load in series; the mass block is fixed at the tail ends of the two piezoelectric cantilever beams to form an L-shaped structure; one permanent magnet is fixed to the free end of the horizontal piezoelectric cantilever beam, the other two permanent magnets are fixed to the base, and the magnets are arranged in a magnetic repulsion mode. According to the designed structure, the inherent frequency of each mode can be effectively reduced, the bimodal characteristic enables the device to present two voltage peak values in a low-frequency environment, and the output voltage under a broadband is improved. Besides, interaction between the magnets is utilized, so that the device shows nonlinear dynamic characteristics, the operation frequency band of the device is further widened, the energy collection efficiency is improved, and the application range of the piezoelectric energy collection device is expanded.

The invention provides a vehicle vibration energy collection device based on piezoelectric effect and nonlinear magnetic coupling and a design method, and belongs to the technical field of vibration energy recovery and automobile energy conservation. The device comprises a shell, a suspension spiral spring, a plurality of cantilever beams, a first permanent magnet and a second permanent magnet, the roots of the cantilever beams are fixed to the inner wall of the shell, the first permanent magnet and the second permanent magnet are fixed to the free ends of the cantilever beams and the suspension spiral spring respectively, and a gap is reserved between the first permanent magnet and the second permanent magnet; and a piezoelectric ceramic piece is arranged on the cantilever beam. The inherent frequency of the energy collection system is effectively reduced through magnetic coupling and mass block loading, efficient matching with the low-frequency vibration environment of the vehicle suspension is achieved, the initial horizontal gap between the first permanent magnet set and the second permanent magnet set is accurately set, the energy recovery efficiency is remarkably improved, and the energy recovery efficiency is improved. And power can be supplied to low-power-consumption vehicle-mounted electronic equipment.

The invention relates to the technical field of noise control, in particular to a cable-supported sound insulation barrier. The sound insulation screen comprises side sound insulation screens arranged on the two sides of a road and a bridge and further comprises a top sound insulation screen arranged above the road and the bridge, the top sound insulation screen comprises a bearing cable net, a main frame, side frames and sound insulation plates, the main frame comprises main stand columns and main beams, and the main stand columns are arranged in the middle of the road and the bridge at intervals in the longitudinal direction of the road and the bridge; the girders are fixedly arranged at the upper parts of the main upright posts along the longitudinal direction of the road bridge; the side frame comprises side stand columns and side beams, the side stand columns are fixedly arranged on the edges of a road bridge at intervals in the longitudinal direction of the road bridge, and the side beams are fixedly arranged on the tops of the side stand columns in the longitudinal direction of the road bridge. The bearing cable net comprises a plurality of main inhaul cables, the main inhaul cables roughly extend in the transverse direction of the road bridge, the two ends of each main inhaul cable are fixed to the corresponding main beam and the corresponding edge beam respectively, the main inhaul cables are arranged at intervals in the longitudinal direction of the road bridge, and the sound insulation plates are arranged on the bearing cable net. The method can be widely applied to noise control projects in the traffic and transportation fields such as highways, railways, subways and high-speed rails.

The present invention discloses a cylindrical double-degree-of-freedom flow-induced vibration experimental device based on a rolling disc design, comprising a main body support, a central axis, a mass pound, a disc assembly and two tension spring assemblies; the disc assembly is sleeved on the upper end of the central axis, the main body support is sleeved on the disc assembly, the two tension spring assemblies are respectively mounted on the upper surface and the lower surface of the main body support, and the tension spring assembly is connected to the central axis, and the lower end of the central axis is mounted on the mass pound. The present invention realizes double-degree-of-freedom movement in the cylindrical plane through the rolling disc design, reduces the friction damping of the experimental mechanism during the flow-induced vibration of the cylinder, improves the accuracy of the experimental results, and provides support for model experiments to study the flow-induced vibration characteristics of risers. The present invention can be used for riser design in marine engineering.

The present invention proposes an ultra-low frequency mass tuned damper, which relates to the field of dampers. An ultra-low frequency mass tuned damper comprises a base, a support structure and a mass block, wherein the support structure comprises two support assemblies symmetrically arranged on both sides of the base, and the mass block is arranged between the two support assemblies. The support assembly comprises a support shaft and a plurality of connecting rod mechanisms, wherein the connecting rod mechanisms comprise two connecting plates, slots are provided at both ends of the connecting plates, the slots between the connecting plates overlap, and the support shaft passes through the slots. The free end of any connecting plate is connected to the base and hinged to the base, and the free end of the other connecting plate is hinged to the mass block. Rib plates are arranged in the middle of the two support shafts, a spring is arranged between the two rib plates, and the two ends of the spring are respectively connected to the two rib plates. The present invention has a simple structure and is easy to install, and can achieve ultra-small horizontal stiffness, thereby adapting to ultra-low vibration frequencies, and playing a better protective role for engineering structures.

A semi-actively controlled submarine propulsion shaft system quasi-zero stiffness vibration isolation device comprises a negative stiffness mechanism that can move axially relative to the propulsion shaft, an automatic equilibrium position adjustment mechanism that adjusts the position of the negative stiffness mechanism, a positive stiffness mechanism, and a semi-active vibration control system; the negative stiffness mechanism comprises a mobile steel frame, a radial damper, a radial spring, and a thrust plate, a thrust bearing, and a thrust flange arranged on the propulsion shaft; the outer cover of the negative stiffness mechanism is provided with a submarine skeleton, the submarine skeleton is fixedly connected to the submarine shell, a plurality of automatic equilibrium position adjustment mechanisms are arranged circumferentially between the submarine skeleton and the outer periphery of the negative stiffness mechanism, and a positive stiffness mechanism is arranged between the submarine skeleton and the two ends of the negative stiffness mechanism; the positive stiffness mechanism comprises a plurality of longitudinal springs and a switch-controllable damper; the automatic equilibrium position adjustment mechanism comprises a swinging oil cylinder, a gear, and a rack. The present invention reduces the natural frequency of the system while having radial and axial vibration isolation effects.

The application discloses a stiffness and damping adjustable vibration isolator and relates to the technical field of vibration isolation devices.The vibration isolator comprises a load platform, a foundation platform, a damping device, a positive stiffness component and a negative stiffness component.The foundation platform is arranged below the load platform, the stiffness component and the damping device are arranged between the foundation platform and the load platform, two working ends of the damping device, the positive stiffness component and the negative stiffness component are respectively connected with the load platform and the foundation platform, the stiffness of the positive stiffness component and the negative stiffness component is adjustable, the damping device can change the damping by changing the current size of the wire on the damping device, the vibration isolator can adjust the positive stiffness, the negative stiffness and the damping, and has a wide application range.

The invention relates to a self-adaptive anti-galloping device for a galloping wire of a power transmission tower. Comprising a support fixedly connected with a cross arm, an upper hanging ring connected with a wire, a piston with the top end fixedly connected with the upper hanging ring, a spring bolt fixedly connected with the bottom end of the piston, a shell in sliding connection with the piston and a lower hanging ring fixedly connected with the shell. The shell is fixedly connected with the bracket; the lower hanging ring is fixedly connected with the insulator string; a jacking device is arranged between the spring bolt and the shell; an elastic pressing device is arranged between the piston and the shell; the device has the beneficial effects that through the arrangement of the piston, the spring bolt, the pressing device and the jacking device, the galloping energy is released, the inherent frequency of the system is reduced, the galloping amplitude is also reduced, and the tension of a wire hanging point is reduced, so that a power transmission line is protected, the probability of wire breakage is greatly reduced, and the loss caused by a power grid accident is reduced.

The invention provides a hydrogenated butadiene-acrylonitrile rubber material, a preparation method thereof and application of the hydrogenated butadiene-acrylonitrile rubber material in an automobile synchronous belt. The hydrogenated nitrile rubber material is prepared from the following components in parts by weight: 30-60 parts of hydrogenated nitrile rubber, 80-130 parts of weight-increasing masterbatch, 2-4 parts of an anti-aging agent, 5-50 parts of carbon black, 1-15 parts of a plasticizer, 0.1-4 parts of a flow dispersing agent, 3-10 parts of short fibers, 1-10 parts of a vulcanizing agent and 0.1-5 parts of an assistant crosslinking agent. The hydrogenated butadiene-acrylonitrile rubber material provided by the invention has improved material density and excellent comprehensive performance, and the automobile synchronous belt prepared from the hydrogenated butadiene-acrylonitrile rubber material can reduce the inherent frequency of the timing belt, control the resonant frequency within a low-speed range, and effectively relieve the formation of high-rotation-speed noise.

A multi-direction low-frequency piezoelectric vibration energy collector comprises a base, a flexible beam, an inertial mass body and a piezoelectric plate. The base is of a cylindrical hollow structure; the inertial mass body is located in the center of the base in a static state; the flexible beam is a sheet which is deformable and has a self-recovery trend during deformation, and the width direction of the flexible beam is along the axial direction of the base; the flexible beam is bent along a fold line in the width direction of the flexible beam and is divided into a piezoelectric flexible beam and an elastic connecting beam which are located on the two sides of the bend, and the included angle between the piezoelectric flexible beam and the elastic connecting beam is smaller than 90 degrees. Wherein the elastic connecting beam is connected with the inertial mass body, and the piezoelectric flexible beam is connected with the edge of the base; and the piezoelectric plate is arranged on the surface of the piezoelectric flexible beam. According to the multi-direction low-frequency piezoelectric vibration energy collector, the inherent frequency of the structure is reduced, the collection efficiency of vibration energy is further improved, and therefore multi-direction and low-frequency vibration energy collection is achieved.

The application relates to a dielectric elastomer-based active-passive integrated vibration isolator, mainly comprising a quasi-zero stiffness vibration isolation part (1), a vibration active control part (2), a guide shaft (3) and a spring supporting base (4), wherein the quasi-zero stiffness vibration isolation part (1) comprises a nonlinear stiffness element supporting spring (10), a nonlinear stiffness element (11) and a stop piece (12); the vibration active control part (2) comprises a dielectric elastomer supporting spring (20) and a dielectric elastomer (23) fixed between a dielectric elastomer fixed inner frame (21) and a dielectric elastomer fixed outer frame (22). Compared with the prior art, the application has the advantages that a lower inherent frequency can be obtained through the combination of positive and negative stiffness, meanwhile, a larger bearing capacity is achieved; the dielectric elastomer (23) is combined with a linear spring, so that the stress and strain are larger; a larger bandwidth of disturbance can be isolated through active-passive integration, and different external excitations can be adapted.

The present invention relates to the field of rail transit technology, and discloses a full-section prefabricated plate vibration-damping track structure and a construction method, wherein the structure includes a grouting layer, a vibration-damping cushion layer and a prefabricated track plate from bottom to top; the vibration-damping cushion layer is arranged under the prefabricated track plate, and the vibration-damping cushion layer and the prefabricated track plate are composited into one; the grouting layer is made of a self-compacting concrete material with good fluidity, and the grouting layer is used to fill the gap between the vibration-damping cushion layer and the arc-shaped shield segment; two prefabricated plate reserved guide grooves that are engaged with wedge-shaped support blocks are arranged on both sides of the prefabricated track plate; before the grouting layer is formed, the wedge-shaped support block is used to support the vibration-damping cushion layer and the prefabricated track plate; after the grouting layer is formed, the wedge-shaped support block cancels the support for the vibration-damping cushion layer and the prefabricated track plate, and realizes the contact between the vibration-damping cushion layer and the grouting layer. The full-section prefabricated plate vibration-damping track structure of the present invention has a good vibration-damping effect.

The present invention belongs to the field of micro-electromechanical systems (MEMS), and specifically relates to a differential resonant MEMS accelerometer with adjustable stiffness, comprising: a sensitive mass block; a folded beam, one end of the folded beam is connected to the sensitive mass block, and the other end of the folded beam is connected to an anchor point; a straight beam resonator, one end of the straight beam resonator is connected to the sensitive mass block, and the other end of the straight beam resonator is connected to the anchor point, and the straight beam resonator is symmetrically placed about the center of the sensitive mass block to form a differential structure; a driving electrode and a sensing electrode are distributed on the same side of the straight beam resonator, and a control electrode is distributed on both sides of the straight beam resonator, and the driving electrode, the sensing electrode and the control electrode are of the same size, and the driving electrode, the sensing electrode and the control electrode are at the same distance from the straight beam resonator. The flexural stiffness of the straight beam resonator can be adjusted, the sensitivity and signal-to-noise ratio of the accelerometer are improved, and a mechanical frequency locking phenomenon is generated, and the early warning effect of acceleration is achieved by switching between two mechanical locking frequencies.

The invention provides a heavy oil separator. The heavy oil separator comprises a shell, an inlet, a liquid phase outlet and a gas phase outlet are formed in the shell, a gas phase gathering area, a separation area and a liquid phase gathering area are arranged in the shell, the gas phase gathering area is communicated with the gas phase outlet, the liquid phase gathering area is communicated with the liquid phase outlet, and the separation area is located between the gas phase gathering area and the liquid phase gathering area; the cyclone separators are arranged in the separation area, each cyclone separator comprises a riser and a downcomer, the cyclone separators are arranged in parallel, a reinforcing structure is arranged in the 1 / 3L-2 / 3L area of the riser in the height direction, the reinforcing structure is fixedly connected with the riser, and the span of the riser is adjusted. According to the heavy oil separator disclosed by the invention, the problem that the riser is easy to break can be effectively improved, the phenomenon that heavy oil carries water is improved, the quality of an intermediate product is improved, and the load of a Fischer-Tropsch device is reduced.

The submarine pipeline damping device comprises a pipeline, a base, an inclined coil spring and a pipe clamp, the inclined coil spring is wound on the outer circumference of the pipeline, the pipe clamp is laid on the outer side of the inclined coil spring, and the inclined coil spring is wrapped by the pipe clamp and the base together. The inclined coil spring structure in the submarine pipeline damping device provided by the invention is a main component for realizing low inherent frequency in the whole system, and plays a key role in system damping. Compared with a traditional rubber shock absorber and a traditional metal shock absorber, the performance in all aspects is greatly improved, the inherent frequency of a system can be effectively regulated and controlled by adjusting the wire diameter, the number of turns and the cross section size of the spring through the design, large-amplitude resonance under external excitation is avoided, and the stability of the system is improved.

This invention discloses a vibration isolation device, relating to the field of vibration isolation control. It comprises a first-level passive vibration isolation unit consisting of a lower plate and lower elastic supports, a middle plate, an inertial reaction force vibration suppression module, and an upper elastic supports, forming a second-level vibration isolation unit. The inertial reaction force vibration suppression module consists of an actuator, a mass block, and quasi-zero stiffness legs. Sensors for acquiring external vibrations and outputting feedback signals are installed on the middle plate. A controller receives the feedback signals and sends action commands to the actuator. The vibration isolation device provided by this invention employs a dual-layer dynamic architecture, deeply integrating a magnetic quasi-zero stiffness mechanism with electromagnetic active control. It aims to completely eliminate the dependence of traditional quasi-zero stiffness systems on the weight of specific equipment, achieve efficient blocking of excitation forces across the entire frequency band under broad loads, and fundamentally solve the problem of dynamic instability in the resonance region of the system.

The invention discloses a shock absorber, and relates to the technical field of shock absorption, the shock absorber comprises a base, the base is provided with a first cavity and a second cavity, and the first cavity communicates with the second cavity; the leveling valve is communicated with the second chamber; the gas film part covers the opening of the first cavity in a sealing manner; the air floating seat is arranged at the opening of the first chamber and is connected with the air film piece; the damping device is arranged in the first cavity and connected with the air floatation seat; and the trigger is used for triggering the leveling valve. The air floating seat is in a suspended state after the first chamber and the second chamber are filled with air; when vibration is generated, the trigger makes contact with the leveler, an external gas source is communicated with the second cavity, gas firstly enters the second cavity and then enters the first cavity, and the situation that the sudden-increasing gas is inflated to impact the gas film, so that the air floating seat generates sudden-increasing height change is prevented; and a force opposite to the vibration direction is generated to suppress the vibration amplitude, so that resonance is prevented.

The invention relates to a variable-stiffness shock insulation structure system and method for strut equipment, the system is installed in a supporting structure below the strut equipment, the system comprises inclined rods, variable-stiffness shock insulation energy consumption connecting sets and self-resetting ribs, the inclined rods arranged in a crossed mode and the self-resetting ribs arranged in a staggered mode are arranged in column limbs of a lattice type tower of the supporting structure, and the inclined rods are connected with the self-resetting ribs. A sliding groove is formed in the column limb in the vertical direction, the pair of inclined rods is hinged to the middle point, the lower ends of the inclined rods are hinged to the column limb, and the upper ends of the inclined rods are connected with the sliding groove in a sliding mode through a variable-rigidity shock insulation energy dissipation connecting set. The variable-stiffness shock insulation energy dissipation connecting set comprises a spring set and a viscous damper, and the upper end of the inclined rod is connected with the lower side surface and the two side surfaces of the sliding groove through the spring set and connected with the upper side surface of the sliding groove through the viscous damper. Compared with the prior art, three-dimensional synergistic shock insulation and nonlinear synergistic energy consumption are achieved on a large-range frequency band, and the deformation limiting function under large deformation and the static bearing requirement under small deformation are met.

The invention discloses a friction sliding three-dimensional shock insulation support which comprises an upper cover plate, a lower cover plate and a sliding shock insulation unit, and the upper cover plate is fixedly connected with an upper structure; the lower cover plate is oppositely arranged below the upper cover plate and is fixedly connected with the lower structure; the vertical bearing capacity of the sliding shock insulation unit is large, the vertical rigidity is small, and the sliding shock insulation unit can be used for vertical shock insulation; the sliding vibration isolation unit can slide between the upper cover plate and the lower cover plate, and horizontal vibration isolation can be achieved. The angle of the sliding shock insulation unit can be automatically adjusted, and the upper cover plate is kept parallel to the lower cover plate. When vibration is small, the sliding vibration isolation units absorb vibration energy through internal self-adjusting sliding, after the vibration is gradually increased, the sliding vibration isolation units move relative to the upper cover plate and the lower cover plate, and the vibration energy is consumed in a sliding friction mode for the second time; the friction sliding three-dimensional shock insulation support can flexibly adapt to shock of different degrees, and is good in shock insulation effect, low in manufacturing cost, simple in structure and convenient to construct.