527results about How to "Improve the vibration isolation effect" patented technology

The invention discloses a precise leveling system of a vibration isolation foundation bed. The lower bottom surface of the vibration isolation foundation bed is supported by air springs; a precise optical vibration isolation platform is arranged on the vibration isolation foundation bed; one or two level monitors are arranged on the precise optical vibration isolation platform for measuring an included angle between the vibration isolation platform and the absolute level in two mutually vertical directions; flexible leg monitoring devices are respectively connected with the own air springs; the output ends of the level monitors and the flexible leg monitoring devices are respectively connected with the input ends of controllers; the output ends of the controllers are connected with all control valves; an air channel port of each control valve is respectively connected with the own air spring; air supplying devices respectively supply air for each control valve. The precise leveling system realizes vibration isolation of Grade II; the vibration isolation platform has highly precise planarity and meets requirements of various precision instruments for the environment; the control valves realize the air inflow of a small amount during the charging process of the air springs, improve leveling precision and can keep the system stable. The precise leveling system is applicable to ultra precise measurement and processing.

The invention belongs to the field of wind power generation, in particular to a damping composite type variable rigidity vibration attenuating support for a gearbox of a wind powered generator. The support mainly comprises an upper yoke (1), a lower yoke (3), four hollow vertical columns (2), an upper elastic body (4), a lower elastic body (4), an upper base (5) and a lower base (5), wherein the upper yoke (1), the lower yoke (3) and the four hollow vertical columns (2) form a combined type main frame of the vibration attenuating support; a viscoelastic damping vibration attenuating layer (11) is compounded on the main frame; after being respectively combined with the upper base (5) and the lower base (5), the upper elastic body (4) and the lower elastic body (4) are respectively fixed on the upper yoke (1) and the lower yoke (3); the vibration attenuating support is connected to the main machine frame (6), and a gearbox torque arm (9) is arranged between the upper elastic body and the lower elastic body. The invention has the characteristics of light dead weight and low cost, the rigidity of the vibration attenuating support can form a non-linear change along with the increase of loads, and the vibration attenuating support has damping attenuation capability and further reduces the transfer of the vibration and the noise of a system to a lower foundation.

The air spring vibrating isolation base with the magnetic suspension unit includes the: the basal body, a group of air spring, the air feed system, the high controlling system, many magnetic suspension units, the low stiffness righting device. The input of the air feed system and the high controlling system are connected with each other. The output of the high controlling system is connected with every air spring; the magnetic suspension unit is connected to the air feed system. The magnetic suspension and the air spring are connected under the basal body in series to support it; the side of the basal body is installed with the low rigidity righting device. The invention can be proper for the super high air spring isolation base in the condition of not changing the bearing ability of the vibration separation system.

The invention provides a precise vibration isolation system which comprises a first layer of vibration isolator, a second layer of vibration isolator and a micrometric displacement detector; the first layer of vibration isolator is formed by connecting a first air spring and a magnetorhelogical fluid vibration isolation device in parallel, and the second layer of vibration isolator is formed by connecting a second air spring and a micrometric actuating element in parallel; the second layer of vibration isolator is arranged above the first layer of vibration isolator, and the first layer of vibration isolator and the second layer of vibration isolator are connected in series to be an integral; the micrometric displacement detector is connected with the magnetorhelogical fluid vibration isolation device of the first layer of vibration isolator, and the micrometric actuating element is connected with a vibration measurement sensor; a precise instrument is arranged above the second layer of vibration isolator and connected with the micrometric displacement detector by a vibration measurement light path. By adopting a double layer vibration isolation structure based on control by the micrometric actuating element, the invention can meet the requirement of the precise instrument on low frequency vibration isolation noise reduction and greatly improve anti-vibration capacity of the precise instrument.

The invention discloses a band gap adjustable type phononic crystal vibration isolator based on shape memory alloy and relates to a vibration isolator. The band gap adjustable type phononic crystal vibration isolator based on shape memory alloy aims to solve the problems of existing one-dimensional phononic crystal vibration isolators that the periodicity of period materials is low, vibration isolating effect is poor, working space is limited, the band gap can not be adjusted, and the vibration isolation frequency range is narrow. The band gap adjustable type phononic crystal vibration isolator comprises a vibration input support, lateral skin, upper skin, lower skin, a secondary vibration isolation upper support, a vibration output support, a primary vibration isolation lower support, three primary vibration isolation phononic crystal support pillars, three secondary vibration isolation phononic crystal support pillars, three trinary vibration isolation phononic crystal support pillars, three sets of primary vibration isolation shape memory alloy compression driving components, three sets of secondary vibration isolation shape memory alloy compression driving components, three sets of trinary vibration isolation shape memory alloy compression driving components, three sets of primary vibration isolation phononic crystal components, three sets of seconday vibration isolation phononic crystal components and three sets of trinary vibration isolation phononic crystal components. The band gap adjustable type phononic crystal vibration isolator is used for vibration isolation and noise reduction.

The invention provides a suspension system for an electric vehicle power assembly. The suspension system comprises a left longitudinal beam, a right longitudinal beam, a beam, plate brackets and a power assembly, wherein the beam is rigidly connected with the left longitudinal beam and the right longitudinal beam; the plate brackets are arranged on the beam in the longitudinal direction at intervals; two ends of each plate bracket are connected with the left longitudinal beam and the right longitudinal beam by virtue of a left suspension cushion and a right suspension cushion; the front part of the power assembly is rigidly connected with the plate brackets in the vertical direction; the rear part of the power assembly is hoisted on the beam by virtue of a left suspension assembly and a right suspension assembly. By adopting the suspension system disclosed by the invention, the space arrangement requirements, anti-vibration performance requirements and anti-collision requirements of the electric vehicle power assembly can be simultaneously met when the electric vehicle is manufactured by adopting the frame of the traditional fuel power train vehicle.

There is provided a vibration isolator capable of, (1) vibration isolation performance for ground motion disturbance: vibration isolation for floor vibration, and (2) vibration control performance for direct acting disturbance: suppression of swing due to driving reaction force caused by stage movement, significantly improving the above (2), i.e., the vibration control performance, with keeping the above (1), i.e., the vibration isolation performance, at a high level.

The invention provides a railway vehicle second level vertical suspension applying an inerter and a parameter determining method thereof. The railway vehicle second level vertical suspension comprises the inerter, a damper, a main spring and an auxiliary spring, and the main spring is in parallel connection with the damper and then is in parallel connection with a series connection structure of the inerter. According to the suspension parameter determining method, the minimum of a Sperling index is used as an optimization object, under the premise that the root-mean-square value of the dynamic deflection of the second level vertical suspension is not beyond one third of a limiting stroke, the parameter is obtained by optimization through a particle swarm optimization algorithm. A simulation analysis result shows that the railway vehicle second level vertical suspension and the parameter determining method thereof, the Sperling index of railway vehicles can be effectively lowered in the riding process, and the riding stability of the railway vehicles can be improved.

The invention discloses a periodic-structure vibration isolation device which comprises two panels, multiple vertical rods and multiple oblique rods, wherein the two panels are arranged at intervals; one panel is connected with equipment which needs vibration isolation through a vibration isolator, and the other panel is connected with a mounting base by virtue of a vibration isolator; the multiple vertical rods are arranged in an array and are vertically arranged between the two panels so as to form multiple vibration isolation regions, reinforced rib plates are arranged at connection parts between all vertical rods in each vibration isolation region and the upper and lower panels; one oblique rod is arranged between every two reinforced rib plates which are arranged in opposite angles of each vibration isolation region, and the oblique rods in the two adjacent vibration isolation regions are arranged symmetrically relative to the common vertical rod, so that a vibration isolation structure with periodic arrangement is formed, the band notched characteristic of the periodic structure is formed and effective vibration isolation and noise reduction are realized. The device is capable of not only providing sufficient static rigidity and dynamic rigidity, but also effectively isolating low-frequency narrow-band line spectrums and wide-band vibration transfer which are generated by main and auxiliary mechanical devices and restraining noise radiation caused by vibration transfer.

The invention discloses a laminated type PVDF actuator comprising multilayer PVDF piezoelectric film units. PET films are adhered to the two sides of the multilayer PVDF piezoelectric film units. In the multilayer PVDF piezoelectric film units, directions of polarization of two adjacent layers of PVDF piezoelectric films are opposite, and the two adjacent layers of the PVDF piezoelectric films are mutually adhered via epoxy resin layers. Conductive lead wires are respectively led out of all layers of the PVDF piezoelectric films in the multilayer PVDF piezoelectric film units and between the PVDF piezoelectric films and the PET films. All conductive lead wires are mutually connected in a spacing way so that a first electrode and a second electrode are formed respectively. Besides, the invention discloses an active and passive hybrid vibration isolator on the basis of the laminated type PVDF actuator. Compared with common passive vibration isolators, vibration in wide frequency range and particularly vibration near natural frequency of the system can be more effectively isolated by the vibration isolator so that appropriate working environment of the instrument is ensured. Meanwhile, volume, mass and structure of the vibration isolator are smaller than those of the passive vibration isolators.

The invention discloses a double-layer vibration isolation seat, which comprises a seat surface and a vibration isolation platform arranged below the seat surface, wherein a seat base is arranged below the vibration isolation platform, and is characterized in that: a first-layer vibration isolation structure positioned at the lower layer and a second-layer vibration isolation structure positionedat the upper layer are arranged between the seat base and the vibration isolation platform, wherein the first-layer vibration isolation platform structure comprises vertically arranged vertical damping springs and negative rigidity vibration isolation structure arranged at the front and rear sides of the vertical damping springs, and the second-layer of vibration isolation structure is arranged above the vertical damping spring. The double-layer vibration isolation seat disclosed by the invention is simple and compact in structure and good in vibration isolation effect; the vibration isolationstructure at the bottom layer is connected with the spring damping above in series to form the double-layer vibration isolation structure, so that the damping ratio, the mass ratio and the rigidity ratio can be properly reduced, thereby the vibration isolation performance of the whole double-layer vibration isolation system is improved; meanwhile, the chair has the advantages of low cost, high reliability and comfort, and better application prospect.

The invention relates to a pneumatic spring vibration isolator of an air flotation type forward and backward swing concatenation mechanism based on a ball head connecting rod, which belongs to the ultra-precise measurement and processing field. An inner cylinder is assembled in an outer cylinder of the vibration isolator, an air bag for an air spring is sleeved outside the upper end of the inner cylinder, a support rod is arranged in the chamber of the inner cylinder after penetrating through an annular cover plate, and the upper end and the lower end of a diagonal cable wire are respectively fixed with the annular cover plate and the support rod to form a single swing mechanism; an upper ball seat and a lower ball seat are respectively arranged on the lower end of the support rod and the upper end surface of the air spring, and the upper end and the lower end of the ball head connecting rod are respectively arranged in the upper ball seat and the lower ball seat to form a reversed swing mechanism; and the single swing mechanism and the reversed swing mechanism form the forward and backward swing concatenation mechanism. The air spring is used as a reversed swing spring, and the rigidity of the reversed swing spring can be changed by continuously adjusting the internal pressure of the air spring, thereby the real time adjustment of the rigidity of the forward and backward swing concatenation mechanism can be realized to meet requirements of different operating conditions. The pneumatic spring vibration isolator is introduced by the forward and backward swing concatenation mechanism, which not only enhances the comprehensive vibration isolation performance of the isolator, but also overcomes many disadvantages of other types of isolators.

The invention relates to the technical field of shock absorption and shock isolation of buildings and particularly relates to a prefabricated compound shock isolation member for an assembling type building. The prefabricated compound shock isolation member for the building comprises a member main body, a connecting assembly arranged on the member main body, and a pre-embedded assembly and reinforcing bars, which are arranged in the member main body; the prefabricated compound shock isolation member is integrally molded through concrete pouring; the connecting assembly is connected with a building member; the pre-embedded assembly is connected with a shock isolation support. The pre-embedded assembly, the reinforcing bars and the connecting assembly are integrally molded through the concrete pouring, so that precision requirements of the reinforcing bars and the pre-embedded assembly are guaranteed and manufacturing can be standardized; the installation efficiency, installation quality and installation precision of the shock isolation support are improved; the shock isolation performance of the building is improved. The pre-embedded assembly is flexible in design and can also be connected with a tensile device, a wind-resisting device and/or a fireproof device, so that the shock isolation support has fireproof, tensile and wind-resisting functions.

The invention discloses an air spring vibration isolation base with gas lubricating unit, which is characterized by the following: comprising base (5), a group of air spring (4), air feed system (1), height controlled system (2), a plurality of gas lubricating unit (3)and erection device with low rigidity; connecting the air feed system (1)to the inputting end of the height controlled system (2); connecting the outputting end of the height controlled system (2)to each air spring (4)separately; connecting the gas lubricating unit (3)to the air feed system (1)directly; cascading the gas lubricating unit (3)and the air spring (4); assembling under the base (5)to support the base; layouting erection device (6)with low hardness at the lateral of the base (5). This invention is fit for super air spring vibration isolation base.

The invention relates to a low-frequency air spring vibration isolator with a motion converter and belongs to the field of precision measurement and precision mechanical/optical processing. The low-frequency air spring vibration isolator is characterized in that the motion converter is assembled inside a traditional air spring passive vibration isolator, is a combined part and mainly comprises a flywheel mass, a screw rod and the like; the load vertical vibration is converted into the rotating motion of a flywheel in the load vibration process. The vibration isolator has the benefits that a certain mechanical damping is provided, so that a vibration signal can be can quickly attenuated; the inherent frequency of the vibration isolator can be further reduced on the basis of not changing the air spring stiffness, so that the stability of a vibration isolation system under the large load is greatly improved.

There is provided a support system for a forklift power train, having little vibration transmission to a body frame, but capable of effectively suppressing movement of the power train against even a quick movement of a vehicle occurred in such a case as when the vehicle is accelerated, decelerated, turned or the like, and simpler in construction for assembling workability.

• In the support structure for a power train of a forklift having a counterweight in the rear part of the body frame, while a front side support is provided at one location positioned at a differential gear case or a frame side cross member and in the vicinity of the roll axis of the power train, a rear side support is provided at two locations, on the right and left sides of the roll axis of the power train, respectively, in the rear part of the body frame, thereby supporting the power train at three locations in all.

The invention relates to a periodic curved beam structure floating raft based on wave mode conversion. The periodic curved beam structure floating raft mainly comprises an upper panel, a plurality of middle periodic curved beam structures and a lower panel, wherein the plurality of the periodic curved beam structures are arranged in the length direction and the width direction of the panels side by side and periodicity is formed in each of the length direction and the width direction; in the thickness direction of the panels, the periodic curved beam structures are of the periodic structures formed by multiple layers of small panels and curved beams; when vibration is propagated along the thickness direction via the curved beams, transfer and conversion of waves can occur, the stop band characteristics of the periodic structures are formed, and the vibration can be greatly attenuated; and the small panels of all the periodic curved beam structures are connected with the upper panel and the lower panel. The floating raft provided by the invention utilizes the stop band characteristics of the periodic structures and utilizes the curved beams with a wave mode conversion effect as elastic elements for providing static stiffness and dynamic stiffness, thereby increasing vibration attenuation, realizing a wideband gap in a lower frequency band and increasing the vibration isolation performances of a low frequency band and a wide frequency band of a vibration isolation device of the floating raft.

The invention discloses a permanent magnet type ultralow-frequency vertical tuned mass damper. The permanent magnet type ultralow-frequency vertical tuned mass damper comprises an inertia mass system, an electromagnetic damping system and a support system, wherein the inertia mass system comprises a counterweight block, a flywheel, an inclined flexible hinge and a vertical flexible hinge; the electromagnetic damping system comprises a conductor plate and a permanent magnet; and the support system comprises a bearing bracket, a flexible hinge fixed plate, an extension spring, a bearing frame, an upper spring cross beam, a lower spring cross beam, a bearing and a base. A straight circular flexible hinge is adopted as a linear-rotary motion conversion mechanism; the space structure of the flexible hinge is well designed; and when the main structure is slowly and slightly vibrated, a small linear motion of the counterweight block can be effectively converted to a rotating motion of the flywheel, so that the problem of excessive static elongation of the spring of the ultralow-frequency vertical tuned mass damper is solved, and the vibration isolating performance of the tuned mass damper in the field of ultralow-frequency weak vibration is improved.