58results about How to "Improve low frequency vibration isolation performance" patented technology

The invention provides a composite damping structure for an airborne photoelectric system. The composite damping structure comprises a round upper end cover, a round lower end cover connected with anairborne platform, a round bearing disc connected with the photoelectric system, eight steel wire rope dampers evenly distributed on the periphery, eight rubber dampers evenly distributed on the periphery and a cable connected with the photoelectric system and an upper computer. The upper end cover and the lower end cover are connected through bolts to form a cylindrical sealed inner cavity. The bearing disc is installed in the middle of the inner cavity, and the inner cavity is divided into an upper cavity and a lower cavity. The eight steel wire rope dampers and the eight rubber dampers areevenly distributed in the circumferential direction of the bearing disc in the lower cavity. The cable is arranged and connected into the upper cavity. According to the composite damping structure, the damping structure is externally moved from the interior of the photoelectric system to the position between the photoelectric system and the airborne platform, integrated and compact structure design is used in the aspect of design of the damping structure, the damping structure is designed as a half-closed device which can be replaced wholly, interior components of the damping structure are completely separated from the exterior harsh environment, and the high outer field maintenance and reliability are ensured.

The invention relates to a U-type vibration isolating device with a novel composite material structure. The U-type vibration isolating device comprises an equipment installing base, wherein the equipment installing base is fixedly connected with a vibration isolating raft frame of a sandwich composite material; the sandwich composite material is at least composed of two sandwich composite material structural beams arranged at intervals; inside and outside of every sandwich composite material structural beam and the end part of the sandwich composite material structural beam are connected with a hull steel substrate through a vibration isolator; three-directional limiting mechanisms are further arranged at the outside and the end part of every sandwich composite material structural beam; the three-directional limiting mechanisms are respectively and fixedly connected with the hull steel substrate and the sandwich composite material structural beams. The U-type vibration isolating device combines the vibration isolating raft frame, the vibration isolator and the three-directional limiting mechanisms; obviously damping effect is generated within a wide frequency band scale, and underwater noise caused by transmitting vibration of a power mechanical device to a hull structure is reduced.

The invention discloses an electromagnetic type active and passive integrated vibration isolator. In the structure of the electromagnetic type active and passive integrated vibration isolator, an electromagnetic actuator consists of an actuator stator and an actuator rotor; the actuator rotor is installed inside the actuator stator and is coaxial to the actuator stator; the actuator stator consists of a coil, a stator frame, a stator lower end cover and a stator upper end cover; the coil, the stator frame, the stator lower end cover and the stator upper end cover are adhered to form an overall body by using AB glue; the actuator rotor consists of a permanent magnet and a rotor yoke; the permanent magnet is adhered with the rotor yoke to form one overall body by using the AB glue; a passive vibration isolator and the stator frame of the electromagnetic actuator are fixedly arranged on an actuator pedestal; the rotor yoke and the passive vibration isolator are fixed together, and the passive vibration isolator is positioned inside the rotor yoke; an equipment connecting part and a safety shielding cover are fixed to the rotor yoke; and the equipment connecting part is higher than the safety shielding cover. The electromagnetic type active and passive integrated vibration isolator disclosed by the invention belongs to active and passive combined vibration isolation and has the advantages of low energy consumption, high space utilization rate, high reliability, high adaptability, wide vibration absorption frequency band and the like.