Crank piston type inerter damping dynamic vibration isolator

Abstract

The invention discloses a crank piston type inerter damping dynamic vibration isolator which includes homologous gears, a crank, a connecting rod, a liquid storage tank, oil, a piston rod, an upper push plate, a lower push plate, a coil spring and the like. The coil spring sleeves a sleeve to play a main supporting role; the lower push plate is connected to an excitation source structure and fixedly connected to the lower end of the piston rod, and the upper push plate is connected to a vibration isolation object; a crank connecting rod mechanism composed of the homologous gears, the crank, the connecting rod, the piston rod and the like converts the vertical vibration of the lower push plate into the rotation of the crank and the homologous gears to play the inerter effect of inertial amplification and modal damping amplification; for cooperating an inerter mechanism, the vibration energy is dissipated through viscous damping generated by oil stirring process performed by blades of the homologous gears and the friction damping generated by a plurality of friction pairs, the vibration energy dissipation efficiency can be greatly improved, and therefore a better energy consumption and vibration reduction effect is achieved.

Description

technical field [0001] The invention relates to a vibration isolator, in particular to a crank-piston type inertial damping dynamic vibration isolator, which is suitable for vibration reduction and isolation occasions of engineering structures such as machinery and civil engineering. Background technique [0002] The passive vibration control method by installing vibration damping devices or tuning devices in the structure is widely used in engineering structures such as machinery and civil engineering. The purpose of the vibrational response of a structure to external excitation. In recent years, with the proposal of inertial components by Japanese and British scholars, the limitations of traditional vibration isolation methods have been broken, and a new direction has been pointed out for the vibration isolation design of engineering structures. The inerter model and inertial vibration isolation system model have become the current research hotspots. Compared with the tr...

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Problems solved by technology

[0003] At present, the existing inerter models are still mainly in the stage of theoretical models, and the physical models are only limited to a few devices such as rack and pinion inerters and ball screw inerters, and these devices have their own conditions and scope of use. , such as insufficient bearing capacity, the influence of meshing clearance on the synchronization of reciprocating motion, etc., are far from meeting the requirements of use in various occasions and conditions, and there are too few types of devices to choose from.

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