56results about How to "Meet the needs of vibration reduction" patented technology

The invention provides a micro-vibration convergence type vibration isolation device used for a satellite flywheel. The micro-vibration convergence type vibration isolation device comprises an upper platform, linings, lower joint pieces, a lower platform, fixed pieces, damping layers, movable pieces, vibration isolators and upper joint pieces. Three trapezoid corners which are evenly distributed are arranged on the upper platform in the circumferential direction, and a plurality of first apertures with the diameter of 3.3 mm are formed in the trapezoid corners and used for being connected with the upper joint pieces. Three grooves which are evenly distributed and used for being connected with the lower joint pieces are formed in the lower platform in the circumferential direction. The upper joint pieces, the vibration isolators, the movable pieces, the damping layers, the fixed pieces and the linings are combined to form three vibration isolator assemblies, the three axes of the three vibration isolator assemblies are converged at one point, and the convergence point is located above the upper platform. The upper platform and the lower platform are connected through the lower joint pieces and the vibration isolator assemblies. The damping layers are clamped between the fixed pieces and the movable pieces. The micro-vibration responses caused when the flywheel operates on orbit can be remarkably reduced, and the stability, reliability and safety of the high-accuracy sensitive load on a satellite are ensured.

The invention discloses a vibration damping box with adjustable rigidity and damping, which is suitable for transporting various boxed materials with a vibration damping requirement and has the advantages of simple structure and convenience for use. Fixing supports are respectively at corners of a box body. A material fixing frame is arranged in the box body. The material fixing frame is provided with a plurality of material fixing holes. A vibration isolator is mounted between the material fixing frame and each fixing support. An acute angle formed by the bearing surface of each vibration isolator and a horizontal direction is 45 DEG. A gasket for adjusting the mounting size of the vibration isolator is arranged between each vibration isolator and the corresponding fixing support. The vibration damping box disclosed by the invention has the beneficial effects that the vibration isolators with different vibration damping properties can be mounted between the fixing supports and the material fixing frame by changing the mounting size of each vibration isolator, so that the different vibration damping requirements of the materials in the box can be met. The vibration damping box not only can meet the vibration damping requirements of the transported materials with different quality but also can meet the vibration damping requirements of the different transportation manners by mounting different models and different types of the vibration isolators.

The invention discloses an intelligent self-energized absorber which comprises a piston, a piston rod, an outer cylinder and an inner cylinder. The piston rod is fixedly connected to the inner side of the outer cylinder, the piston is located inside the inner cylinder and is capable of moving up and down relative to the inner cylinder, a ball shaft sleeve is embedded on the inner wall of the outer cylinder, the outer wall of the inner cylinder is vertically sleeved with a plurality of piezoelectric rings, and the inner cylinder is then arranged in the ball shaft sleeve of the inner wall of the outer cylinder in a sleeved mode. Electrorheological elastic bodies are filled in the space, located above and below the piston, in the inner cylinder, and the electrorheological elastic bodies, the piezoelectric rings and an electronic control module are electrically connected. Energy generated by vibration of vehicles can be obtained, vehicle vibration information can be collected, the captured energy is used for supplying power for the electrorheological elastic bodies, the vibration information is used for self-adaptive control, different voltages are provided to control the damping of the electrorheological elastic bodies according to different road conditions, the absorber is made to meet the vibration reduction demands of the different road conditions, and therefore the riding comfortableness and the handling stability of vehicles can be improved.

The invention relates to automobile parts, and discloses a novel hydraulic mount. The novel hydraulic mount comprises a rubber main spring (3), a shell (4) and a bottom film (12). A cavity filled with magnetorheological fluid is defined by the rubber main ring (3), the shell (4) and the bottom film (12). A vibration isolation mechanism (10) is arranged in the cavity, and divides the cavity into an upper fluid chamber (18) and a lower fluid chamber (17). An annular coil (8) is arranged on the vibration isolation mechanism (10), and the two ends of the annular coil (8) are connected with a power source. An inertia channel (9) is arranged on the vibration isolation mechanism (10), a charging ring (11) is arranged in the inertia channel (9) and connected with a solenoid valve (7), and the solenoid valve (7) is connected with an inflator pump (6). Damping of the hydraulic mount is adjusted through magnetism, and the advantages of being simple and compact in structure, and easy to mount are achieved.

The invention relates to a mechanical frequency modulation type dynamic absorber for a satellite flywheel. A guide rod is vertically fixed to the center of a bottom plate. A shock absorption mass block horizontally moves in the axial direction of the guide rod through a linear bearing. Linear modules are symmetrically arranged on the two sides of the guide rod. The mechanical frequency modulation type dynamic absorber comprises a guide rail, a ball screw, a ball nut sliding block, a leaf spring assembly and a motor connection seat, wherein the guide rail is fixed to the bottom plate, the ball screw is arranged on the guide rail, the ball nut sliding block is arranged on the ball screw, the leaf spring assembly is connected between the shock absorption mass block and the ball nut sliding block. The motor connection seat is fixed to one end of the guide rail. By adoption of the symmetrical structural design, the inherent structure frequency is adjusted according to the mechanical frequency modulation principle and changes of the rotation speed of the flywheel, vibration of the flywheel is controlled and restrained to a low order, stability and reliability of the on-satellite high-accuracy sensitivity load in-orbit operation are ensured, and the mechanical frequency modulation type dynamic absorber has the advantages that the frequency tracing speed is high, the vibration absorption performance is excellent, the structure is simple, reliability is high, assembly is convenient, and the manufacturing cost is low.

The invention relates to an elevator tractor damper based on multilayer metal rubber. The elevator tractor damper comprises a base, wherein at least four cushion fixing seats are symmetrically arranged on the upper end surface of the base, a boss is arranged in the center of the cushion fixing seats, hemispherical high-density metal rubber is arranged above the cushion fixing seats, a groove whichis matched with the boss in the center of the cushion fixing seats so as to limit the high-density metal rubber to slide is formed in the center of the hemispherical plane of the high-density metal rubber, hemispherical low-density metal rubber is arranged above the high-density metal rubber, and a hemispherical groove which is matched with the hemispherical curved surface of the high-density metal rubber is formed in the center of the hemispherical plane of the low-density metal rubber. The invention further relates to a working method of the elevator tractor damper based on the multilayer metal rubber. According to the elevator tractor damper, vibration in all directions can be absorbed by the hemispherical high-density metal rubber and the hemispherical low-density metal rubber, and limiting can be performed by a limiting stop block.

The invention discloses a leaf spring combined dynamic absorber for a satellite flywheel. A connecting base is fixed on a base plate; a guide rail is fixed at one end of the connecting base; a ball screw is arranged on the guide rail; a ball nut sliding block is arranged on the ball screw; a switchover block is arranged on the ball nut sliding block; a leaf spring assembly comprises two groups of leaf springs; one ends of the two groups of leaf springs are respectively connected with two sides of a vibration absorbing mass block, and the other ends of the two groups of leaf springs are respectively connected with the switchover block and the base plate. The leaf spring combined dynamic absorber disclosed by the invention is designed in a lightweight manner, utilizes the combined springs to modulate the frequency, adjusts the inherent frequency of the structure according to change of the revolving speed of the flywheel, controls and restrains the vibration of the flywheel at a lower magnitude, ensures high stability and reliability of in-orbit operation of the high-precision sensitive load on the satellite, and has the advantages of high frequency tracking speed, excellent vibration damping performance, simplicity in structure, high reliability, good convenience in assembly and low manufacturing cost.

The invention discloses a production process for an ethylene propylene diene monomer microporous base plate. The production process comprises the following steps: adding ethylene propylene diene monomer into a kneading machine to knead, and then adding zinc oxide, stearic acid, carbon black, a moisture absorbent, an acid and alkali regulator, a softening agent and an inorganic filler into the kneading machine to knead, thereby preparing a master batch; adding the prepared master batch into an open mixing machine, adding a vulcanizing agent, a promoter, a foaming agent and a foaming aid, uniformly mixing, regulating roll spacing to 0.8-1.3 millimeters for thin-passing, carrying out triangular packaging for 3-4 times, regulating the roll spacing to 5-6 millimeters for discharging, so as to prepare a rubber compound, and standing the rubber compound for not smaller than 16 hours; putting the rubber compound on a cutter for cutting; feeding prepared rubber strips into a cold feeding extruder to extrude; sequentially feeding the prepared rubber strips into a high-temperature section, a microwave section and an oven section to carry out continuous vulcanizing until complete vulcanizing; and pulling the prepared vulcanized rubber into the cutter through a pulling machine, and cutting the prepared vulcanized rubber into a needed dimension, thereby obtaining a microporous base plate finished product. The invention further provides an ethylene propylene diene monomer microporous base plate.

The invention provides a vibration isolation device of a satellite control moment gyro, which is used for vibration isolation of the control moment gyro and comprises vibration isolator assemblies and a cellular plate, wherein the vibration isolator assemblies are disposed on the cellular plate; the vibration isolator assembly comprises a sealing cover, a connecting rod, a vibration isolator, a damping layer, a switch-over part and a base, the connecting rod, the vibration isolator, the damping layer, the switch-over part and the base are connected in sequence; the sealing cover is disposed on the outer side of the connecting rod, the vibration isolator and the damping layer; the base is connected to the cellular plate; and the connecting rod is used to connect the control moment gyro. Quantity of the vibration isolator assemblies is four; the four vibration isolator assemblies are distributed in a rectangular manner; and the two adjacent vibration isolator assemblies are distributed symmetrically. The vibration isolation device of the satellite control moment gyro provided by the invention is rational in structural design, can significantly reduce interference of micro-vibration responses caused by the control moment gyro during in-track running to a sensitive load, and ensures stability, reliability and safety of the high-precision sensitive load on a satellite during the in-track running.

The invention provides a periodic pile and vibration isolation device. The periodic pile and vibration isolation device comprises a periodically designed pile structure; the pile structure comprises aplurality of piles; the cross section of each pile is X-shaped; the piles comprises scattered piles and locally resonant piles; scattered bodies of the scattered piles are a single material; a wrapping layer of a different material is added between a matrix and scattered bodies of locally resonant piles. The arrangement of the piles comprises hexagonal lattice arrangement, square lattice arrangement and rectangular lattice arrangement with different aspect ratios. The periodic pile and vibration isolation device utilizes the elastic wave band gap characteristic of a periodic structure (piles), so that the vibration level of a target frequency band is remarkably reduced to meet the vibration reduction requirement.

The invention discloses a single-rod air bag type magnetorheological damper, which comprises a working cylinder, an electric magnet, a damping bar and an air bag, wherein the working cylinder is cylindrical, and an end cover is respectively fixed on the upper end and the lower end of the working cylinder; a hole is arranged in the centre of the upper end cover and a sliding bearing is arranged inside the hole; the inner diameter of the working cylinder is larger than the outer diameter of the air bag; the distance between the upper end cover and the lower end cover of the working cylinder is greater than the height of the air bag; the air bag is installed on the bottom inside the working cylinder; one end of the air bag is fixed with the lower end cover of the working cylinder, and the other end of the air bag is fixed with one end of the damping bar; and the other end of the damping bar extends out of the interior of the working cylinder through a bearing on the upper end cover of the working cylinder; a magnetorheological fluid injected in the working cylinder is higher than the air bag and the height of the magnetorheological fluid injected in the working cylinder is less than the distance between the upper end cover and the lower end cover of the working cylinder; and the electric magnet is fixed on the outer circle of the working cylinder.

The invention discloses a frictional damping dynamic vibration absorber. The frictional damping dynamic vibration absorber comprises an inverted-T-shaped base (5) connected with the opening end of a spherical shell (3). An elastic sleeve (4) is fixedly connected between the inverted-T-shaped base and the opening end of the spherical shell. A vibration damping cavity (10) defined by the spherical shell (3) is filled with a plurality of vibration damping balls (2). An adjusting nut (1), which is screwed out upwards or screwed in downwards to change the size of the vibration damping cavity, is arranged on the upper part, corresponding to the opening of the spherical shell, of the spherical shell and is used for adjusting the movement range of the vibration damping balls in the vibration damping cavity. According to the inherent frequency of a printed-circuit board (PCB), the number of the vibration damping balls filling the vibration damping cavity is calculated through a dynamic vibration absorption theoretical formula. By adopting the frictional damping dynamic vibration absorber, the problems that an existing vibration absorber is provided with an electromagnetic source and a power source which are likely to generate radiated interference on electronic equipment, and cannot be used for damping vibration of a small thin-board structure of the PCB due to the large size and weight in the prior art are solved. The frictional damping dynamic vibration absorber has the characteristics of good vibration damping effect, small size and weight and the like and meets the requirements for vibration damping of PCBs under the condition of the high vibration magnitude.

The invention relates to a forcer for fixing a machine tool base. The forcer comprises a body, a retaining disc, a spring and two studs. A boss is disposed on the body. The retaining disc is connected to the lower end of the body through threads. The spring is mounted between the boss and the retaining plate. The length of the spring is a quarter of that of the body. The studs are connected to the lower end of the body in a threaded manner. The included angle between the two studs is 90 degrees. By the forcer, machine tool vibration during mechanical machining is solved effectively, and vibration reduction requirements of factories can be satisfied effectively. In addition, the forcer is simple in structure, convenient to operate, economical and practical.

The invention relates to the technical field of valves, and discloses a flow control valve, a vehicle suspension shock absorber assembly and a vehicle suspension system. The flow control valve comprises a valve body assembly and multiple high-speed switch valves; the valve body assembly comprises a main valve body, multiple mounting parts are arranged on the main valve body, oil inlet holes and oil outlet holes which communicate with the interiors of the mounting parts are formed in the positions, located on the mounting parts, of the main valve body correspondingly, and the oil inlet holes communicate with the corresponding oil outlet holes to form multiple oil channels arranged in parallel; the high-speed switch valves are arranged in the mounting parts respectively and are in sealing fit with the mounting parts, and the on-off states of the oil channels are controlled by controlling opening and closing of the high-speed switch valves. The flow control valve has the characteristics of being large in flow adjusting range, high in response speed and high in flow control precision, and can be applied to different working conditions.

The invention discloses a cylindrical eddy current damping device, a damping regulation method and a bridge vibration attenuation structure, and relates to the technical field of vibration attenuationdevices. The damping device comprises a supporting frame, a mass block, an induction strong magnet, a straight line guide rail and a copper pipe, wherein the induction strong magnet comprises a firstinduction strong magnet and a second induction strong magnet; the copper pipe comprises a first copper pipe and a second copper pipe; the first induction strong magnet and the second induction strongmagnet are respectively arranged at two sides of the mass block; the first copper pipe and the second copper pipe are respectively arranged at two sides of the supporting frame; when the mass block vibrates, the first induction strong magnet and the second induction strong magnet respectively carry out reciprocating motion in the first copper pipe and the second copper pipe. According to the damping regulation method, the internal radius and the external radius of the copper pipe and the size of the induction strong magnet are regulated to realize different damping coefficients. The bridge vibration attenuation structure comprises the damping device. Through a Ferrari electromagnetic induction principle, the energy of structure vibration is adsorbed, and a damping proportionality coefficient can be conveniently regulated.

The invention relates to automobile parts and discloses a semi-active hydraulic suspension. The semi-active hydraulic suspension comprises a rubber main spring (13), a shell (3) and a bottom film (7). A cavity is defined by the rubber main spring (13), the shell (3) and the bottom film (7) in an enclosed mode. A vibration isolation mechanism (5) is arranged in the cavity and divides the cavity into an upper liquid chamber (21) and a lower liquid chamber (22). A first channel (51) and a second channel (52) are formed in the vibration isolation mechanism (5). A cover plate (81) is arranged on the vibration isolation mechanism (5) and located below the first channel (51). The cover plate (81) is provided with at least one square hole (811). A motor (84) is arranged on the shell (3) and provided with a lifting shaft (83). The lifting shaft (83) is provided with a flow limiting block (82) which controls opening and closing of the square holes (811). The dynamic characteristics of the hydraulic suspension are controlled through the motor, so that the semi-active hydraulic suspension meets the requirements for vibration reduction under different working conditions.

The invention discloses a vibration reduction method for aeolian vibration of circular tube components of a power transmission tower. The vibration reduction method comprises the following steps firstly, field investigation is carried out, and the circular tube components needing to be subjected to vibration reduction on the power transmission tower are determined, then at least one iron tower fixing part close to the circular tube components is selected for each circular tube component on the power transmission tower, and then an adjustable inerter is installed between the circular tube components and the iron tower fixing parts so as to restrain vibration of the circular tube components. The method has the beneficial effects that the used inerter is simple in structure, low in economic cost and convenient to use, the inertia force characteristic of the inerter is easily adjusted by adjusting the structure of the inerter, the vibration reduction requirements of the power transmission tower circular tube components are met, and simulation experiments and engineering practice prove that the inerter can achieve the ideal vibration reduction effect.