60results about How to "Guaranteed vibration isolation performance" patented technology

The invention discloses an ultralow frequency vibration isolator based on parallel connection of a positive stiffness spring and a negative stiffness spring, comprising a guide post, a sheath cover, a sliding block, a negative stiffness spring, a lower cover, a guide seat, a ball and a main spring. According to the invention, the main spring (a positive stiffness spring) is connected with the negative stiffness spring in parallel, thus a vibration damper can have the characteristics of high static stiffness and low dynamic stiffness, and zero-hertz ultralow frequency vibration isolation is realized; connection of a screw thread pair is adjusted, thus a stiffness curve of a vibration isolator is adjusted according to vibration isolation quality, and vibration isolation performance can be adjustable; and rolling friction is realized by adopting balls, thus frictional resistance is reduced. The ultralow frequency vibration isolator disclosed by the invention can be used as one component and is applicable to an environment under vibrational excitation, especially an environment under low frequency vibrational excitation, such as a vehicle seat, a suspension, precise instrument vibration isolation as well as vibration attenuation and seismic resistance.

The invention discloses a novel positive/negative rigidity parallel low-frequency vibration isolation mechanism. The mechanism comprises a positive-rigidity spring adjusting device, a vertical spring body, a negative-rigidity structure, a negative-rigidity spring adjusting device, a damping structure, a bearing structure, a horizontal spring support column and a base support fixed structure, wherein the positive-rigidity spring adjusting device includes a circular sleeve, an adjusting knob and a pressure sensor 1; the negative-rigidity structure includes a horizontal spring body and a sleeve, horizontal spring slide blocks 1 and 2, a horizontal spring connecting rod and a cylinder side wall hinge device; the negative-rigidity spring adjusting device includes a stud and and an adjusting knob thereof, a stud fixed frame, a pressing spring body, a pressing adjusting nut, and a pressure sensor 2 and a fastening nut thereof; the damping structure includes an adjusting cushion plate, a damper and a connecting plate thereof; the bearing structure includes a bearing table and a cylinder side wall; and the base support fixed structure includes a support plate, a disc base, a support cushion leg, a support column and a linear bearing. The mechanism has such vibration isolation advantages as compact structure and accurate adjustment.

The invention provides a vibration isolator for a track floating slab, which comprises an upper cover plate, a bottom plate, a telescopic sleeve and a vibration isolation assembly, and is characterized in that the telescopic sleeve is connected between the upper cover plate and the bottom plate to form a sealed chamber; the vibration isolation assembly comprises a damping agent placed in the sealed chamber, the upper cover plate is provided with a damping adjustment assembly convenient for injecting and extracting the damping agent, the damping adjustment assembly comprises an injection through hole and a sealing plug, the injection through hole is formed in the upper cover plate, and the sealing plug is detachably mounted in the injection through hole. The vibration isolator has the advantages that large-range effective adjustment of damping is guaranteed, damping adjustment is convenient, and efficiency is high.

The invention relates to a vibration isolation system with back pressing devices, and belongs to the technical field of vibration reduction of civil engineering structures. The vibration isolation system is used for controlling influences of vibration of machinery equipment on external environments or relieving influences of vibration of the external environments on the machinery equipment. The vibration isolation system comprises a counterweight bench and vibration isolators, the vibration isolators are located between a base and the counterweight bench which is supported on the vibration isolators, elastic supporting elements are arranged in the vibration isolators, and the elastic supporting elements are at least composed of metal helical springs; and the vibration isolation system further comprises the back pressing devices, each back pressing device comprises a back pressing elastic element and a connecting part, one end of each back pressing elastic element acts on the counterweight bench, the other end of each back pressing elastic element acts on the corresponding connecting part, the connecting parts is connected with the base or vibration isolator bases, and the direction of acting force of the back pressing elastic elements on the counterweight bench is opposite to that of supporting force of the elastic supporting elements on the counterweight bench. Compared with the prior art, according to the vibration isolation system with the back pressing devices, the inherent frequency is easy to control, and the vibration isolation effect is better guaranteed.

The invention provides a fixed-frequency nonlinear rubber vibration isolator for a floating slab track and a design method. It is guaranteed that in an empty vehicle state, a floating slab track bed has the same vibration isolation performance and the unchanged inherent frequency as those in a heavy vehicle state, the track vertical displacement in the heavy vehicle state is effectively restrained, and the system safety is guaranteed. The fixed-frequency nonlinear rubber vibration isolator comprises a base 1, a conic rubber pile, an upper supporting seat, a heightening cushion board and a locking screw, the top face of the base is attached to the inner conic face of the conic rubber pile, and the bottom face of the upper supporting seat is attached to the outer conic face of the conic rubber pile. The conic rubber pile comprises an inner conic steel disc, an outer conic steel disc and at least one layer of conic rubber body located between the inner conic steel disc and the outer conic steel disc and fixedly connected with the inner conic steel disc and the outer conic steel disc. Each conic rubber body is composed of conic rubber ring units arranged along the conic faces of the inner conic steel disc and the outer conic steel disc at intervals. Each conic rubber ring unit is provided with an exhausting channel communicating with the outer side of the vibration isolator.

The invention discloses a large-scale vibration engineering control device optimization arrangement method. A control device refers to a steel spring vibration isolator. The method includes the steps of (1), determining a steel spring initial arrangement scheme according to the actual engineering; (2), building an integral finite element calculation model of a vibration isolation system; (3), determining a loading condition; (4), calculating actual bearing capacity F of each steel spring by software through finite element calculation; (5), calculating vibration isolation efficiency Etan of each steel spring according to the formula Etan=actual bearing capacity F/ultimate bearing capacity[F]; (6), uniformizing the vibration isolation efficiency and calculating the uniform vibration isolation efficiency[Eta] according to the formula [Eta]=(Eta<1>+Eta<2>+Eta<3>+...+Eta<n>)/n; (7), if the vibration isolation efficiency Etan meets the formula (Eta<n>-[Eta])/[Eta]</=10%, then determining the effective scheme; (8), carrying out model calculation and analysis to the whole vibration isolation model; (9), determining the final scheme if requirement for model is met, in other words, the modal calculation fundamental frequency error is lower than 10%; and (10), arranging the steel springs according to the determined final scheme.

The invention discloses a vibration isolation device for construction equipment installation. The device comprises an installation seat and at least one vibration isolation support device. The vibration isolation support device comprises a vibration isolation support assembly and a torsional damping mechanism. The torsional damping mechanism can convert up-and-down movement generated when an installation seat vibrates into swing movement of a transmission rod, and a vibration isolation effect is further guaranteed. In the torsional damping mechanism, through cooperation of a sliding block anda sliding groove, conversion from up-down motion to swing motion can be effectively achieved without too many parts, and a vibration isolation effect of the installation base is improved in a limitedspace. Vibration transmitted to a building by building equipment can be effectively reduced integrally so that a building structure is protected, and noise pollution is reduced.

The invention provides a vibration-isolating hub for an air blower. On one hand, the vibration-isolating hub allows soft elastic characteristic in the twist direction and enhances the vibration abatement effect, and on the other hand, allows hard elastic characteristic in the direction perpendicular to the axis and in the prizing direction and effectively stables the rotation of main bodies of blades. The vibration-isolating hub (14) for the air blower has a rigid cylindrical member (18), a rigid connecting plate (20) which is rotated integratedly with the main bodies of the blades, and an elastomer which allows elastic connection of the cylindrical member (18) and the connecting plate (20). The vibration-isolating hub (14) is disposed at the center of the rotating air blower and achieves the effect of vibration isolation. The cylindrical member (18) is arranged at such a position that the cylindrical member and the connecting plate (20) are not overlapped in the radial direction, in a manner to wholly deviate along the axis direction relative to the outer members. The cylindrical member (18) and the connecting plate (20) are connected along the axis direction via the elastomer (22).

The invention discloses a quasi-zero stiffness-based vibration isolator, and belongs to the field of ultra-precise vibration attenuation. The vibration isolator is characterized in that an magnetorheological elastomer relatively low in stiffness is connected in parallel on the basis of taking a slotting belleville spring having a negative stiffness displacement region as a main elastic component;stiffness of the magnetorheological elastomer is regulated by a stiffness regulating device, so that a whole vibration isolation system connected in parallel by the slotting belleville spring and themagnetorheological elastomer under a load meets the need of quasi-zero stiffness under a certain working displacement region, and a possibility is provided for realizing low inherent frequency, high load-carrying capacity and small deformation required by the precise vibration isolation system.

The invention discloses an installing system for electric vehicle power assemblies and an electric vehicle. The installing system is connected among a left side longitudinal beam, a right side longitudinal beam and an auxiliary frame, and used for bearing all the power assemblies of the electric vehicle. The system comprises a bracket and a suspending assembly matched with the bracket, the suspending assembly at least comprises a first suspension connected between the bracket and the left side longitudinal beam and a second suspension connected between the bracket and the right side longitudinal beam, the first suspension, the second suspension and a third suspension each comprises a suspension body, a first connecting part and a second connecting part, the first connecting parts and the second connecting parts are connected to the two ends of the suspension bodies, the suspension bodies comprise first cylinders and supporting parts attached to the interiors of the first cylinders, thesupporting parts comprise second cylinders and X-type supports arranged in the second cylinders, and the second cylinders and the X-type supports are integrally arranged. By arranging the suspensionbodies with the X-type supports, the X-type supports conduct supporting in four directions, in this way, turning impact caused by operating of movement parts can be effectively resisted, and then thevibration isolation performance of NVH is guaranteed.

The invention relates to the technical field of track buffering vibration isolators, and discloses a rubber vibration isolator structure applied to a railway track for buffering train vibration. The rubber vibration isolator comprises a track, a cushion block is arranged at the bottom end of the track, clamping plates are arranged on both sides of the track, rubber shells are arranged in the interiors of the clamping plates, metal covers are fixedly installed in the interiors of the rubber shells, rubber particles are fixedly installed in the interiors of the metal covers, and dampers are fixedly connected to the interiors of the rubber particles. According to the rubber vibration isolator structure applied to the railway track for buffering the train vibration, the rubber shells are arranged on the two sides of the track, the metal covers are arranged in the interiors of the rubber shells, the rubber particles are arranged in the interiors of the metal covers, and pressing plates and second springs are arranged in the rubber particles, so that damping and buffering are conveniently carried out through the rubber shells, the metal covers and the rubber particles; and the rubber shells, the metal covers and the rubber particles are all independent units, so that independent replacement is conveniently carried out, and the phenomena of over-high maintenance cost, difficult maintenance and the like are avoided.

The invention provides an open type sinking air floatation platform overhead floor overhanging vibration damping system. The system comprises a vibration isolation platform (2) providing a support plane for upper equipment (1), a plurality of air spring vibration isolators (3) arranged below the vibration isolation platform (2), an overhead floor (4) in which a vibration isolation joint is left onthe side surface of the vibration isolation platform (2) and a gap is left on the top surface of a vibration isolation foundation of an air floatation platform and isolated from the air floatation platform and independent of each other, a supporting main steel beam (5) which is an overhanging type section steel member and used for supporting a supporting secondary steel beam (6) and the overheadfloor (4), the supporting secondary steel beam (6) which is a steel member, connected with the overhead floor (4) and used for supporting the overhead floor (4), and a concrete terrace (7) which is formed by indoor and outdoor terraces around the vibration isolation platform (2) and serves as an anchoring section for the supporting main steel beam (5), wherein one section of the supporting main steel beam (5) is anchored into the concrete terrace (7), so that a supporting structure formed by the overhead floor (4) is completely isolated from the air floatation vibration isolation platform.

The invention provides a vibration isolator for a track floating slab. The vibration isolator comprises an upper cover plate, a base plate, a telescopic sleeve and a vibration isolation assembly, wherein the telescopic sleeve is connected between the upper cover plate and the base plate to form a sealed chamber; the vibration isolation assembly comprises a damping agent, a spiral damping disc anda spring, and the damping agent is arranged in the sealed chamber. One end of the spiral damping disc is detachably mounted on the upper cover plate, the other end of the spiral damping disc extends into the damping agent, and the spring is installed between the upper cover plate and the base plate. The vibration isolator has the advantages of being adjustable and replaceable damping, low in maintenance cost and the like.

The invention discloses a cluster type control moment gyroscope vibration isolation method for inhibiting posture adjustment resonance, and relates to the field of vibration isolation. The invention aims to solve the problem of resonance of a control moment gyroscope caused by coupling of vibration displacement generated by a control motor on the existing control moment gyroscope and a certain-order vibration mode of the control moment gyroscope provided with a vibration isolator. The method includes: constructing a cluster type control moment gyro entity model and a kinetic model; obtaining an inherent frequency according to the two models, and obtaining a theoretical value of space coordinates of a lower fulcrum of the vibration isolator according to the inherent frequency; correcting the theoretical value of the space coordinates of the lower supporting point of the vibration isolator to obtain final space coordinates of the lower supporting point of the vibration isolator; obtaining structural parameters of a plurality of springs and dampers according to the final space coordinates of the lower fulcrum of the vibration isolator, and designing a spring model and a damper model;according to the spring model, the damper model and the final damper lower fulcrum space coordinates, adjusting the vibration isolator structure and the connecting positions of the four vibration isolator lower fulcrums and the fixed plane. The method is used for determining the installation position of the vibration isolator.

The invention relates to a rigid-flexible coupled multi-dimensional vibration isolation platform. The platform is mainly composed of a lower platform, lower platform guide connecting blocks, lower flexible hinges, hollow cylindrical guide rods, solid cylindrical guide rods, upper flexible hinges, upper platform guide connecting blocks and an upper platform. In order to solve the problems that a traditional multi-dimensional vibration isolation platform is large in occupied space, small in vibration isolation amplitude, high in frequency, complex in structure and the like, the multi-dimensional vibration isolation platform takes the flexible hinges as torsion spring units of the vibration isolation platform, length changes of branch chains within a wide range are achieved through small-angle torsion of the flexible hinges, and the vibration isolation requirement of large-amplitude vibration is met. Rigidity-free joint hinges are adopted, the overall rigidity of the multi-dimensional vibration isolation platform is reduced, vibration isolation within the low-frequency range is achieved, and the vibration isolation frequency domain of the multi-dimensional vibration isolation platform is widened. The multi-dimensional vibration isolation platform adopts the same branch chain form, the structure is simple, symmetry is high, motion coupling between the branch chains is avoided, part interchangeability is high, maintaining is convenient, the size is small, the weight is low, and mounting is convenient.

The invention belongs to the technical field of noise vibration control, and particularly relates to an oil-resistant high-temperature-resistant damping rubber, a preparation method and application thereof. The oil-resistant high-temperature-resistant damping rubber comprises 80-100 parts of nitrile butadiene rubber, 10-30 parts of chlorinated butyl rubber, 50-70 parts of a filler and 32-82 partsof an auxiliary agent. According to the damping rubber, chlorinated butyl rubber with weak polarity and nitrile butadiene rubber with strong polarity are used as blending components, so that the working temperature range of the rubber can be widened, the internal friction damping of the rubber can be greatly improved, vibration isolation effects are optimized, and the rubber has good damping and vibration isolation performance; when the rubber is used for noise reduction of a transformer and an electric reactor, outward transmission of noise can be effectively reduced, and the vibration transmission efficiency of a transformer body and an electric reactor body to an oil tank is reduced; and the rubber has good oil resistance and high-temperature resistance and can be used for a long time in insulating oil under the high-temperature condition.

The invention provides a food processer. The food processer comprises a base, an outer cover, a stirring container and a vibration isolation assembly, wherein the base is covered by the outer cover; the stirring container can be placed in a containing cavity of the outer cover; the vibration isolation assembly is detachably arranged on the inner wall of the outer cover; and when the stirring container is in the containing cavity, one end of the vibration isolation assembly pushes against the outer wall of the stirring container. According to the food processer, the outer cover is arranged, specifically, the outer cover is arranged on the base in a covering manner, then an accommodating cavity used for positioning is provided for the stirring container placed inside, and further, the stirring container is located in an omnibearing, multi-angle and multi- dimension manner in match with the vibration isolation assembly; further, due to the arrangement of the structure, the vibration deviation amount of the stirring container in the horizontal direction is reduced, so that the coaxiality of the stirring container and the base is guaranteed, further, the transmission of vibration is reduced, the running noise of the product is reduced, and the use performance and market competitiveness of the product are promoted; and furthermore, due to the arrangement of the vibration isolation assembly, a certain sealing role is played, the effect of attenuating noise is achieved, and further, the running noise of the product is reduced.