Electromagnetic rotating inertial mass damper

Abstract

The invention discloses an electromagnetic rotating inertial mass damper. The electromagnetic rotating inertial mass damper comprises a guiding rod, a rolling ball screw rod, a rolling ball nut, a planet speed increaser, a tail barrel, a power generator, a storage battery and a tail rod; the guiding rod is connected with the rolling ball nut on the rolling ball screw rod through a sliding rod; the guiding rod and the sliding rod are parallel to the rolling ball screw rod which is connected with an input shaft of the power generator through the planet speed increaser; the tail barrel is installed on the rear end face of an inertial mass amplifying box; the power generator is installed in the tail barrel; the tail rod is installed at the rear end of the tail barrel; and an output terminal of the power generator is connected with the storage battery and a variable resistor. A closed structure is adopted for the electromagnetic rotating inertial mass damper, damage to the electromagnetic rotating inertial mass damper caused by sand, dust, rainwater and the like under the severe weather condition can be effectively prevented, and the reliability of the electromagnetic rotating inertial mass damper is effectively guaranteed; the electromagnetic rotating inertial mass damper is simple in structure and good in shock absorbing effect; and the electromagnetic rotating inertial mass damper is additionally provided with a power generator device, the outside mechanical energy can be converted into the electrical energy which is stored, and if the electromagnetic rotating inertial mass damper is used for semi-active control, external electrical energy supply is not needed.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction devices for civil engineering, and in particular relates to an electromagnetic inertial mass damper. Background technique [0002] Civil engineering structures are prone to large vibrations under external excitations such as strong winds and earthquakes, which affect the safety and comfort of the structure. technology. Among them, inertial dampers based on energy dissipation, energy absorption and vibration reduction are applied. In order to increase the mitigation effect of inertial mass dampers on engineering structures, many researchers have carried out research on the adjustment of damping by inertial mass dampers. On the one hand, the research is to provide electric energy from the outside to adjust the resistance. By adjusting the current of the damper to change the damping ratio of the inertial mass damper, the stiffness and damping can be continuously adjusted, and the vertica...

AI Technical Summary

Problems solved by technology

This kind of damper has the dual functions of vibration reduction and energy recovery, but the MR fluid is easy to consume and leak oil, and the sealing is a serious problem. In addition, after a long time of work, the damping force of the MR fluid has decreased; the patent authorization number is CN1421581, the name It is the invention of "tunable mass damper for generator energy consumption", which belongs to the category of tuned mass damper

He adjusts the frequency of the tuned mass damper by increasing or decreasing the number of springs, drives the motor to generate electricity by means of mechanical engagement, and uses the adjustability of the adjustable resistance to adjust the damping ratio of the tuned mass damper to achieve the optimal control effect. And the number of springs is too large, which affects the stability of the system and has poor practicability; the patent authorization number is CN102493572A, and the name is "A tuned mass damper with adjustable damping energy storage", which also belongs to the category of tuned mass dampers

During the reciprocating motion of the mass caused by the damper absorbing the vibration energy of the main structure, the permanent magnet produces a changing magnetic field, and an induced electromotive force is generated in the coil to form electromagnetic damping to suppress the movement of the permanent magnet. By adjusting the adjustable resistance in the damping adjustment device, thereby Change the size of electromagnetic damping, but the efficiency of linear reciprocating motion is low, and the adjustable damping force is small, which is not conducive to large structures

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