143 results about "Inerter" patented technology

The invention discloses a low-frequency vertical tuned mass damper with a negative stiffness nonlinear energy trap, and belongs to the technical field of structural vibration control. The tuned mass damper comprises a bottom plate, a thrust bearing, a spiral spring, a ball screw, a ball nut, a mass block, a moving permanent magnet set, a fixed steel plate, a fixed permanent magnet set, a sliding bearing and a copper flywheel. The tuned mass damper has the negative stiffness nonlinear energy trap characteristic by utilizing the nonlinearity of the attraction force between the moving permanent magnet set and the fixed permanent magnet set; the equivalent vibration mass of the tuned mass damper is amplified through a ball screw type inerter mechanism, the vibration reduction effect of the tuned mass damper is improved, and meanwhile the problem that the net elongation of a spring of an ultralow-frequency vertical tuned mass damper is too large is solved. The low-frequency vertical tuned mass damper integrates the advantages of a nonlinear energy trap and a tuned mass damper, and broadens the control frequency band of the tuned mass damper; and meanwhile, the durability of the low-frequency vertical tuned mass damper is improved by adopting an eddy current damping technology.

The invention discloses an adjustable ultralow-frequency vertical eddy current tuned mass damper (TMD) and belongs to the technical field of structural vibration control. The ultralow-frequency vertical eddy current TMD comprises a base, a rigid framework, a rigid framework cross beam, a mass block position adjusting rod, a first nut, a second nut, a mass block, a permanent magnet fixed plate, a permanent magnet set, a conductor copper plate, a magnetic conductive steel plate, a first linear guide rail, an inerter-damping system, a coil spring and a second linear guide rail. The actual physical mass of the TMD is reduced by the inerter-damping system, and the problem of net elongation of a spring of an ultralow-frequency vertical eddy current is too large is solved; the device frequency isadjusted continuously by adjusting the distance between the mass block and a fixed reamer; and an eddy current damping technology is adopted, and the device damping is adjusted continuously by adjusting the distance between the permanent magnet set and the conductor copper plate. In addition, the device has the advantages of simple assembly, easy-to-adjust frequency and damping, good durability and the like.

The invention relates to a vertical tuned mass magnetic lead screw type inerter eddy current damper. The vertical tuned mass magnetic lead screw type inerter eddy current damper comprises a spring mass system, an inertia mass system, an eddy current damping system and a supporting system; the spring mass system comprises a spring and a clump weight; the inertia mass system comprises a flywheel, amagnetic lead screw nut pair and a magnetic suspension thrust bearing; the eddy current damping system comprises a straight-strip-shaped permanent magnet, a conductor plate and back iron; and the supporting system comprises guide rods, a supporting bracket and an outer frame. According to the damper, the inerter principle is introduced, physical balance weight is reduced, the net elongation of thespring of a low-frequency structure controlled by the device is reduced while the mass ratio of the device is increased; by adopting the magnetic lead screw nut pair, the friction between a lead screw and a nut is eliminated, and the working efficiency is improved; meanwhile, the magnetic suspension thrust bearing is used cooperatively to ensure that the flywheel is suspended in a flywheel chamber to work normally; and the overall friction of the damper is greatly reduced, and the service life is prolonged.

The invention provides a vertical tuned mass ball screw type inerter eddy current damper. The vertical tuned mass ball screw type inerter eddy current damper comprises an outer frame, a vertically-arranged guide rod, a support frame, a mass block, a spring, a permanent magnet, a conductor plate and an iron plate, and a set gap is reserved between the permanent magnet and the conductor plate; and the damper further comprises a vertically-arranged ball screw, a nut, a flywheel and a thrust bearing. When vibration energy of the controlled structure is transmitted to the damper, the mass block iscaused to vibrate up and down, the flywheel is driven to rotate at a high speed through the ball screw, the conductor plate cuts magnetic induction lines of the permanent magnet, and the eddy currentdamping effect is formed; and the back iron can reduce magnetic flux leakage and improve the damping energy consumption efficiency. According to the vertical tuned mass ball screw type inerter eddy current damper, a gap between the permanent magnet and the conductor plate remains unchanged in the moving process of the mass block, so that the distance between the permanent magnet and the conductorplate can be set to be very small, and very large damping force can be generated; the mass block does linear motion, the damping force has no torque on the mass block, the pressure between the mass block and the guide rod is not increased, and the motion is smooth.

The invention belongs to the field of vibration and noise control, and relates to a three-dimensional vibration isolation device combining an inerter and a rubber support. The three-dimensional vibration isolation device combining the inerter and the rubber support comprises a spiral spring, a rotary shaft, a rotary disc, rotary disc constraint parts, coils, neodymium magnets, damping liquid, damping rods, an upper sleeve, a lower sleeve, a Teflon sleeve, laminated rubber, a lead core, a rubber protective sleeve, an upper connecting plate, a lower connecting plate, a rubber support upper protection plate and a rubber support lower protection plate. According to the three-dimensional vibration isolation device combining the inerter and the rubber support, three-dimensional vibration isolation is achieved by connecting an inerter vibration isolation system and the rubber support in a decoupling mode; and effective vertical vibration isolation can be achieved by connecting the spiral spring and the inerter system in parallel, horizontal vibration isolation can be achieved by the rubber support, and a decoupling system is arranged, so that horizontal vibration isolation and vertical vibration isolation function respectively to achieve three-dimensional vibration isolation. The three-dimensional vibration isolation device combining the inerter and the rubber support is widely applicable to buildings built over a subway and important instruments and equipment with three-dimensional vibration isolation requirements, and the three-dimensional vibration isolation effect is better than that of an existing steel spring vibration isolator.

The invention discloses a damping device for tuning the collision inerter mass of a fan. The device comprises a bearing mechanism, a damper, a mass block, multiple inerter mechanisms and multiple collision mechanisms. The bearing mechanism is arranged on a platform, the damper is installed on the bearing mechanism, the upper portion of the damper is connected with the lower portion of the mass block, a piston rod of the damper is fixedly connected to the bearing mechanism, and the mass block is connected with the cabin wall of a fan power generator cabin through multiple connection mechanisms.Inerters and the collision mechanisms are arranged on the outer side of the mass block separately at intervals, one end of each inerter mechanism is fixedly connected with the outer wall of the massblock, and the other end of each inerter mechanism is connected with the cabin wall of the fan power generator cabin. A collision gap is reserved between each collision mechanism and the outer wall ofthe mass block. The damping device for tuning the collision inerter mass of the fan has the advantages that the inerters are combined with the collision mechanisms, the inertia force, inerter force,collision force and damping force generated by coupling the inerters with the collision mechanisms are used for structural vibration attenuation, and the work space of the mass block is narrowed.

An apparatus for damping an actuator includes an inerter. The inerter includes a first terminal and a second terminal movable relative to one another along an inerter axis and configured to be mutually exclusively coupled to a support structure and a movable device actuated by an actuator. The inerter further includes a rod coupled to and movable with the first terminal and a threaded shaft coupled to and movable with the second terminal. The inerter further includes a flywheel having a flywheel annulus coupled to one of the rod and the threaded shaft. The flywheel is configured to rotate in proportion to axial acceleration of the rod relative to the threaded shaft in correspondence with actuation of the movable device by the actuator.

The invention relates to a commercial vehicle inerter with an adjustable inertance being self-adaptive to working conditions and belongs to the technical field of inerters for vehicles. The commercialvehicle inerter with the adjustable inertance being self-adaptive to working conditions comprises an inerter body, a flywheel assembly, a metamorphic mechanism and a connection rod-slider mechanism.The inerter body converts vertical movement of a vehicle frame and an axle into rotation of the flywheel assembly, and the effect of increasing the 'virtual mass' of the inerter is achieved. The commercial vehicle inerter with the adjustable inertance being self-adaptive to working conditions is reliable in work and free of time lag; under the no-load work condition and the full load working condition, based on the metamorphic principle, the structure of the metamorphic mechanism can conduct self-reconstruction and reassembly; when the vehicle is under the no-load working condition, the inerter works, the effect of lowering the no-load offset frequency is achieved by increasing the 'virtual mass' of the inerter, the flywheel assembly can conduct self-adaptive adjustment of the inertance according to the external excitation frequency, so that the inertance is continuously variable; when the vehicle is under the full-load working condition, the inerter does not work, it is guaranteed that the offset frequency of a suspension system is the designed full-load offset frequency, the stress of the suspension system is not increased, and the service life of the suspension is prolonged.

The invention discloses a crank piston type inerter damping dynamic vibration isolator which includes homologous gears, a crank, a connecting rod, a liquid storage tank, oil, a piston rod, an upper push plate, a lower push plate, a coil spring and the like. The coil spring sleeves a sleeve to play a main supporting role; the lower push plate is connected to an excitation source structure and fixedly connected to the lower end of the piston rod, and the upper push plate is connected to a vibration isolation object; a crank connecting rod mechanism composed of the homologous gears, the crank, the connecting rod, the piston rod and the like converts the vertical vibration of the lower push plate into the rotation of the crank and the homologous gears to play the inerter effect of inertial amplification and modal damping amplification; for cooperating an inerter mechanism, the vibration energy is dissipated through viscous damping generated by oil stirring process performed by blades of the homologous gears and the friction damping generated by a plurality of friction pairs, the vibration energy dissipation efficiency can be greatly improved, and therefore a better energy consumption and vibration reduction effect is achieved.

The invention relates to an eddy current type particle inerter damper. The eddy current type particle inerter damper comprises a simple pendulum damping unit and a particle inerter unit which are connected through a gear transmission assembly, and swing of the simple pendulum damping unit can be transmitted to the particle inerter unit through the gear transmission assembly; the simple pendulum damping unit comprises a simple pendulum damping unit box body and a simple pendulum mass body, the simple pendulum mass body is arranged in the simple pendulum damping unit box body in a swinging mode,the upper end of the simple pendulum mass body is connected with the gear transmission assembly, and a permanent magnet is arranged on the simple pendulum mass body; and a conductor plate corresponding to the permanent magnet is arranged on the inner wall of the simple pendulum damping unit box body, and the simple pendulum mass body generates an eddy current damping effect when swinging. Energyconsumption can be tuned through the simple pendulum mass body, energy consumption can further be achieved through particle collision and elasticoplastic deformation, multiple energy consumption mechanisms are achieved, in addition, the particle collision efficiency is improved through the inerter amplification effect, and thus the vibration reduction and energy consumption effect is better.

The invention provides an inerter device with multistage adjustable inerter coefficients and a control method of the inerter device. The inerter device comprises a hydraulic cylinder, a hydraulic motor, a one-way valve, a flywheel box, a linear motor, an ECU and a sensor. Two flywheels with different rotational inertia are arranged in the flywheel box; the ECU determines an inertial coefficient value of the current working condition; a command is sent to the linear motor based on the smaller inertia coefficient value difference value, the linear motor drives a shifting fork shaft to move in the axial direction, such that a joint sleeve is made to be meshed with or not meshed with the joint gear ring of the flywheel with the small inertia coefficient value difference value, and therefore the output shaft of the hydraulic motor drives different flywheels to rotate, and the inertia coefficient of the whole inerter device is changed. Due to the fact that the joint sleeve is meshed with ornot meshed with joint gear rings of different flywheel, the inertia mass coefficient of the inertia volume device can be adjusted in a multistage mode, and the comfort and stability of a vehicle are improved.

The invention discloses an electromagnetic multistage adjustable variable inertial capacitance and variable damping device. An iron core is magnetized by arranging an electromagnetic coil winding outside the iron core and applying a current action to the electromagnetic coil winding; an air gap magnetic field is generated in an air gap by using the magnetized iron core and a permanent magnet so asto cause the change of shear damping force among a driving shear plate, a driven shear plate and a magnet yoke, and the problem that mechanical properties of an inerter cannot be fully utilized because of friction generated by mutual contact among the parts is avoided; and therefore, multistage real-time adjustability of an inertial capacitance coefficient and a damping coefficient of the devicecan be realized.

The invention discloses a gear and rack type electromechanical inertia mass energy feedback device, which adopts a structural form of coupling a linear motor, a rotating motor and a rack and rack mechanism, and can realize three different working modes of energy feedback, passive control and active control, wherein the vibration energy recovery of the system can be effectively realized in the energy feedback mode so as to achieve high energy recovery efficiency, in the passive control mode, a complex mechanical network can be simulated through the linear motor and an electric network on the outer end of the rotating motor while integrated design of the complex mechanical and electrical network is achieved, and in the active control mode, the gear and rack type electromechanical inertia mass energy feedback device can be used as a force generator to perform tuning control on the vibration system. According to the invention, the novel gear and rack type electromechanical inertia mass energy feedback device is excellent in dynamic performance, has multiple working modes, can achieve complex system impedance output, effectively saves installation space and achieves recovery of vibration energy.

The invention belongs to the field of vibration and noise control, and provides an inerter and friction pendulum support combined three-dimensional vibration isolation device. The device comprises a spiral spring, a rotating shaft, a rotating disc, rotating disc constraint components, coils, neodymium magnets, damping fluid, damping rods, an inerter system upper cover plate, an inerter system lower cover plate, a Teflon protection sleeve, a sliding block, an upper connecting plate and a lower connecting plate. An inerter vibration isolation system and a friction pendulum support are connectedin a decoupling manner so as to achieve three-dimensional vibration isolation. The spiral spring and the inerter system are connected in parallel so that effective vertical vibration isolation can beachieved, the a friction pendulum support can achieve the function of horizontal vibration isolation, due to the existence of a decoupling system, horizontal vibration isolation and vertical vibrationisolation can be achieved respectively, and three-dimensional vibration isolation is achieved. The inerter and friction pendulum support combined three-dimensional vibration isolation device can be widely applied to floating floors and other structures and important large equipment needing three-dimensional vibration isolation in special vibration reduction sections of rail traffic and with highrequirements for vibration reduction and noise reduction, and the three-dimensional vibration isolation effect is superior to that of existing steel spring vibration isolators.

The invention relates to the technical field of building damping, and discloses a novel tuning inertial rotary damper. The rotary damper comprises a spring part used for axial movement of a transmitting structure and a rotary damping part used for dissipating energy; the spring part and the rotary damping part are connected through a ball screw pair, so that conversion from axial movement to radial movement is achieved, and the movement amplitude is amplified; and a nut connected with the ball screw pair is further connected with an adjustable mass adjusting block. The novel tuning inertial rotary damper has the functions of an energy dissipation type damper and a tuning type damper, and the performance parameters of the damper can be rapidly adjusted by adjusting the overall rigidity of the spring part, the lead of the ball screw pair and the mass of the mass adjusting block.

The invention relates to a fluid-solid coupling inerter which comprises a cylinder body (1), a piston (7) and a spiral pipeline (3). The piston (7) is movably located in the cylinder body (1) and divides the interior of the cylinder body (1) into two cavities, the spiral pipeline (3) is wound on the outer side wall of the cylinder body (1) in the circumferential direction, the spiral pipeline (3)is communicated with the cylinder body (1), and the cylinder body (1) and the spiral pipeline (3) are filled with fluid (4). The fluid (4) contains solid particles (5). Compared with the prior art, the inerter is simple in structure, the synergistic effect of the apparent mass (inerter coefficient) of the inerter can be further enhanced, and meanwhile the inerter has the energy consumption synergistic function.

The invention relates to the field of earthquake resistance and shock absorption of buildings, in particular to a friction pendulum type three-dimensional multi-stage vibration isolation device with an inerter, which comprises a decoupling system, a horizontal vibration isolation system and a vertical vibration isolation system, the horizontal vibration isolation system is a friction pendulum support mechanism, and the vertical center line of the vertical vibration isolation system and the vertical center line of the friction pendulum support mechanism are kept consistent; the friction pendulum support mechanism is connected with the upper structure; the vertical vibration isolation system is arranged below the friction pendulum support mechanism and connected with a foundation. The inerter vibration isolation system and the friction pendulum support are connected in a decoupling mode to achieve three-dimensional vibration isolation. Effective vertical vibration isolation can be achieved by connecting the spiral spring and the inerter system in parallel, the friction pendulum support can play a role in horizontal vibration isolation, due to the existence of the decoupling system, horizontal vibration isolation and vertical vibration isolation can play roles respectively, and three-dimensional vibration isolation is achieved.

The invention belongs to the technical field of structure vibration control and particularly relates to an inerter unit and spring unit parallel connection ternary vibration reducing device and a design and assembling method. The device comprises a spring unit, a damping unit and an inerter unit. The spring unit and the inerter unit are connected in parallel, and then the spring unit and the inerter unit are connected with the damping unit in series to form a ternary vibration reducing structure. By means of the inerter unit and spring unit parallel connection ternary vibration reducing deviceand the design and assembling method, two sets of ball screw transmission systems are adopted for achieving the inerter unit and spring unit parallel connection ternary vibration reducing structure,a turning effect can be achieved on damping force, the energy consumption capability of the damping unit is sufficiently developed, and the energy consumption and vibration reducing efficiency of thevibration reducing device is improved. In addition, an assembly technology is adopted, and the beneficial effects that adjusting is easy, durability is good, and the energy consumption capability is high are achieved.

The invention discloses a planet roller screw type inerter and an inertia coefficient calculating method thereof. The planet roller screw type inerter comprises a shell; the shell comprises an upper shell and a lower shell; the upper shell and the lower shell are connected through a bolt to form a cavity; a planet roller screw type inerter module is arranged in the cavity, and comprises a center lead screw, a planet rolling column, shaft end baffle plates and a flywheel; the center lead screw is positioned in the center of the flywheel, and is in threaded connection with the planet rolling column through a thread; the two ends of the planet rolling column are rotationally mounted in the shaft end baffle plates; the shaft end baffle plates are fixed in the centers of the upper and lower surfaces of the flywheel through screws; the planet rolling column is in engaged connection with the flywheel through threads; and the flywheel is rotationally mounted in the cavity through a bearing. The planet rolling column and the flywheel are adopted to commonly generate an inertia effect; and through dual motions of revolving and rotation of the planet rolling column, the inertia ratio and theapplicability of the inerter are effectively improved.

The invention relates to the field of railway vehicles, in particular to a vehicle suspension with an adjustable shock absorber damping coefficient and a collaborative design method. The vehicle suspension with the adjustable damping coefficient of the shock absorber comprises a spring, the shock absorber with the adjustable damping coefficient and an inerter, and the spring, the shock absorber with the adjustable damping coefficient and the inerter are arranged in parallel. The damping-adjustable shock absorber is an electromagnetic eddy current shock absorber, the damping coefficient of theshock absorber can be adjusted by adjusting the excitation current of an electromagnet, and the damping coefficient of the shock absorber can be adjusted to the most suitable value by matching with acontrol system according to the requirements of different working conditions and the attributes of a spring and an inerter in the vehicle running process. and thus, the driving safety and comfort of the railway vehicle are improved. The invention further provides a collaborative design method for the spring rigidity, the maximum damping coefficient of the damping-adjustable shock absorber and theinertia mass of the inerter.

The invention relates to an inerter energy-consuming and efficiency-increasing device. The inerter energy-consuming and efficiency-increasing device comprises a ball screw type inerter assembly and a viscous damping assembly, wherein the ball screw type inerter assembly comprises a No. 1 outer cylinder, a screw pair and a rotating flywheel; a screw rod stroke chamber and a flywheel chamber communicated with the outside are arranged in the No. 1 outer cylinder; the screw pair comprises a screw rod, a nut and a plurality of balls; the viscous damping assembly comprises a No. 2 outer cylinder, a guide rod and a piston; the No. 2 outer cylinder is connected with the No. 1 outer cylinder; a main cavity and an auxiliary cavity which are communicated with each other are formed in the No. 2 outer cylinder; the main cavity is communicated with the screw rod stroke chamber; the guide rod is connected with the screw rod; the piston divides the main cavity into a No. 1 chamber and a No. 2 chamber; and the No. 1 chamber and the No. 2 chamber are both filled with viscous fluid. Compared with the prior art, the device is large in output force, long in stroke, capable of avoiding the dead jacking phenomenon and enhancing the stability through the double-outlet-rod structure, simple in form and easy to achieve; and the device is mounted in a structure after being connected with a spring or a support and the like, an asynchronous phase can be generated with the structure, and energy absorption-energy dissipation damping synergy is generated.

The present invention provides an impact-resistant inerter device comprising two non-returning devices. The two non-returning devices are located in an outer shell, and the two non-returning devices are connected by a wheel train; the non-returning directions of the two non-returning devices are reversed, and the two non-returning devices positively or negatively rotate simultaneously so that therotating direction output by the wheel train keeps unchanged. Each non-returning device includes a rack, a gear and a ratchet, wherein the rotatable gear is fixed in the outer shell, the gear is engaged with the rack, and one end of the rack extends out of the outer shell to be connected with external force; and each ratchet is mounted inside the corresponding gear, and an output shaft of each ratchet is connected to the wheel train. According to the impact-resistant inerter device, a transmission system is designed so that a flywheel can always rotate in one direction, the problem that a flywheel of a current gear and rack type inerter changes the direction and generates impact force is solved, and the impact-resistant inerter device is compact in structure and convenient to arrange.

The invention belongs to the field of variable inertia mass control, and particularly discloses an inertia mass vibration reduction system with an adjustable inertia mass coefficient. The inertia massvibration reduction system involves a flywheel main body, mass blocks, actuators, guide rails, a control unit and a base, wherein the flywheel main body is arranged on the base; the plurality of guide rails extending towards the radial direction of the flywheel main body are uniformly distributed and connected to the peripheral edge of the flywheel main body, and one mass block is arranged on each guide rail; and the actuators are arranged on the flywheel main body and used for independently pushing the mass blocks to slide on the guide rails where the mass blocks are located under the control of the control unit, so that the inertia mass vibration reduction system has the actually-needed inertia mass coefficient, and stepless adjustment of the inertia mass coefficient is achieved. According to the inertia mass vibration reduction system, the mass blocks can be controlled to be close to or away from the center of a flywheel according to a control instruction in the control unit, so that the inertia mass coefficient of inertia mass can still be adjusted at will after installation, that is, the inertia mass coefficient of the inertia mass can be adjusted and controlled in a steplessmode; and redisassembly and reassembly are not needed in engineering application, so that the inertia mass vibration reduction system is very convenient.

The invention discloses a double-inerter parallel type four-order vibration reduction structure. The double-inerter parallel type four-order vibration reduction structure comprises two stages of second-order vibration reduction structures, and the two stages of second-order vibration reduction structures are divided into the first-stage second-order vibration reduction structure and the second-stage second-order vibration reduction structure; each of the first-stage second-order vibration reduction structure and the second-stage second-order vibration reduction structure comprises a spring, aninerter and a damper, and the first-stage second-order vibration reduction structure and the second-stage second-order vibration reduction structure are both in a series connection form of the spring, the damper and the inerter or in a series-parallel connection integrated form; and the upper end point and the lower end point of the first-stage second-order vibration reduction structure are connected with the upper end point and the lower end point of the second-stage second-order vibration reduction structure respectively to form a double-inerter parallel type fourth-order vibration reduction structure. According to the double-inerter parallel type four-order vibration reduction structure, the damping ratio and the vibration reduction effect of a fan system can be effectively improved.

The invention discloses a particle damper. The particle damper comprises an inerter energy absorption mechanism and a friction energy dissipation mechanism, wherein the inerter energy absorption mechanism is installed on a controlled component and configured to rotate and generate inertia force when the controlled component vibrates, and then vibration energy of the controlled component is absorbed; and the friction energy dissipation mechanism is connected with the action end of the inerter energy absorption mechanism and configured to rotate along with the inerter energy absorption mechanism and generate a collision and / or friction effect when the inerter energy absorption mechanism rotates, so that the energy of the particle damper is consumed. The particle damper has the advantages of simple structure, low price, rich raw materials, convenient and fast installation and the like, has the dual functions of inerter energy absorption and damping particle energy dissipation, and can achieve the function of effectively absorbing and dissipating the energy of a controlled structure when the structure shakes (vibrates) slightly.

A kit is described that comprises a device adapted to dampen the vibrations transmitted by the rotor to the fuselage; the device comprises two first elements movable along a first axis; two second elements rotatable about the first axis; a first inerter with a first female screw, a first screw, and first rollers rotatable about respective second axes and around the first axis with respect to the first female screw and first screw; a second inerter with a second female screw, a second screw operatively connected to the second female screw; and a plurality of second rollers rotatable about second axes and around the first axis with respect to the second female screw and second screw; the first and second female screws defining the first threaded elements, and the first and second screws defining the second threaded elements; or the first and second screws defining the first threaded elements and the first and second female screws defining the second threaded elements.

The invention discloses a three-mass four-parameter adjustable two-stage vibration reduction passive suspension and a working method thereof. The suspension comprises a traditional vibration reduction structure composed of a first oil cylinder, a first piston rod, a first adjustable throttling valve, a second energy accumulator, a first electromagnetic valve and a first energy accumulator, the suspension also comprises an anti-resonance vibration reduction structure composed of a second oil cylinder, a second piston rod, a first inerter spiral pipe, a second adjustable throttling valve, a second inerter spiral pipe, a second electromagnetic valve, a third energy accumulator, a third electromagnetic valve and a fourth energy accumulator, and the cylinder body of the first oil cylinder and the cylinder body of the second oil cylinder are fixedly connected with a suspension third mass. The suspension third mass vibrates to absorb a part of sprung mass vibration energy input, the sprung mass vibration acceleration is greatly reduced, the working states of the adjustable throttling valves and all the electromagnetic valves can be conveniently adjusted according to the load state of an automobile, and a good suspension comprehensive performance index improvement effect can be achieved under different automobile load states.

The invention discloses a parallel type internal and external combined shock absorber, and belongs to the technical field of auto parts. The parallel type internal and external combined shock absorber comprises an upper base plate, a lower base plate and a shock absorption body, wherein the shock absorption body comprises an external connection shock absorption mechanism and an internal connection shock absorption mechanism; the external connection shock absorption mechanism comprises a small-diameter pressure spring, a medium-diameter tension spring and a large-diameter pressure spring which jointly form a tandem type large-small-diameter tension-compression spring, and a small-diameter frame cylinder and a large-diameter frame cylinder are inserted into the tandem type large-small-diameter tension-compression spring in a sleeving mode to form the external connection shock absorption mechanism; the internal connection shock absorption mechanism is formed by sequentially connecting a first damper, a first inerter, a second inerter and a second damper in series; and the internal connection shock absorption mechanism is sleeved with the external connection shock absorption mechanism to form the shock absorption body, and the shock absorption body is fixedly connected between the upper base plate and the lower base plate to form the parallel type internal and external combined shock absorber. The parallel type internal and external combined shock absorber has the beneficial effects that the vibration frequency can be mixed, the frequency and the amplitude are induced to be converted, the vibration is converted into low-frequency vibration, the vibration in the running process of the automobile is continuously reduced, and the riding comfort of the automobile is improved.

The invention relates to an ultralow-frequency tuned mass inertial damper, and relates to the technical field of damping vibration attenuation devices, the ultralow-frequency tuned mass inertial damper comprises a fixed box and a damper body arranged in the fixed box, the damper body comprises a spring, a damping piece, a mass block and an inertial container, and one end of the spring and one end of the damping piece are fixed to the top of the fixed box; the mass block is fixedly connected with the other end of the spring and the other end of the damping piece and rotationally connected with a rotating shaft. The inerter comprises a rack, a flywheel and a gear, the rack is vertically fixed in the fixed box, the flywheel is fixedly sleeved at one end of the rotating shaft, the gear is fixedly sleeved at one end, close to the flywheel, of the rotating shaft, and the gear is located on the side of the rack and can be meshed with the rack; the mass block can be driven by the spring to move up and down and can drive the flywheel and the gear to move up and down through the rotating shaft, and the gear can be meshed with the rack and drive the flywheel to rotate around the rotating shaft while moving up and down. The static elongation of the spring can be reduced, the frequency and the initial friction resistance can be reduced, and ultralow-frequency structure vibration reduction is achieved.

The invention discloses a method for determining parameters of a self-energized active suspension taking comfort and safety into consideration, application of the method, the suspension designed by applying the parameter determination method and a working method of the suspension, and belongs to the field of automobiles. The method comprises the following steps: firstly, determining five parameters of rigidity of a traditional vibration reduction structure, rigidity of an anti-resonance vibration reduction structure, inerter of the anti-resonance vibration reduction structure, damping of the traditional vibration reduction structure and damping of the anti-resonance vibration reduction structure in a comfortable mode, and then determining two parameters of damping of the traditional vibration reduction structure and damping of the anti-resonance vibration reduction structure in a safe mode; the two requirements of automobile riding comfort and driving safety are considered at the same time, switching among an initial mode, a safe mode and a comfortable mode can be achieved, circulation opening and cut-off control is conducted through oil in the second damping pipe and the fourth damping pipe, two-stage hierarchical control is conducted on damping of a traditional vibration reduction structure and damping of an anti-resonance vibration reduction structure, and the damping effect is good. And the whole suspension can perform work selection of a safety mode and a comfort model according to driving working conditions.