Semi-active dynamic vibration absorber for magneto-rheological elastomers and selection and installation method

Abstract

The invention discloses a semi-active dynamic vibration absorber for magneto-rheological elastomers and a selection and installation method. According to the semi-active dynamic vibration absorber andthe selection and installation method, multiple layers of cross-shaped cross beams arranged in parallel are fixed to the positions below a bottom frame base located at the bottom of a railway vehiclein a suspended mode through four vertical magnetic conductive rods arranged vertically and penetrating through the four end parts of cross-shaped beam arms; multiple layers of stacked structures which are spaced from each other are formed between multiple layers of grooving vibrators and the cross-shaped cross beams; vertical mounting through holes are formed in the centers of the cross-shaped cross beams; the annular magneto-rheological elastomers are arranged between the mounting through holes and a connecting shaft of the multiple layers of grooving vibrators; the multiple layers of grooving vibrators can vibrate up and down relative to the bottom frame base in the axial direction of the mounting through holes; winding grooves are formed in the beam arms of the cross-shaped cross beams; and excitation coils are wound in the winding grooves. The semi-active dynamic vibration absorber has the advantages that the vibration absorption effect is good, the energy consumption is small, the structure is simple and compact, the installation is easy, the safety and the reliability are high, the utilization of the residual space under the railway vehicle is reasonable, and vertical wide-frequency vibration reduction can be carried out on a railway vehicle body which suffers form an abnormal vibration problem due to the fact that a railway is unsmooth.

Description

technical field [0001] The invention relates to the field of rail vehicle vibration reduction and vibration absorption, in particular to a magneto-rheological elastomer semi-active dynamic vibration absorber and a method for selecting and installing the same. Background technique [0002] When rail vehicles are running, the wheel-rail vibration caused by track irregularities is transmitted to the car body through the primary and secondary suspension systems, which not only reduces the running quality of the vehicle, but also has a certain impact on the comfort of passengers. Due to the advantages of simple structure and good vibration reduction effect, dynamic vibration absorber has become one of the effective means to reduce the vibration of the car body and improve the passenger comfort. [0003] Dynamic vibration absorbers are generally divided into three types: passive type, active type and semi-active type: passive type vibration absorbers have a simple structure and ca...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a magnetorheological elastomer semi-active dynamic vibration absorber for rail vehicles and a selection and installation method, which has good vibration absorption effect and low energy consumption, and overcomes the narrow frequency band of the passive dynamic vibration absorber. , can perform vertical broadband vibration reduction on the rail vehicle body that has abnormal vibration problems due to track irregularities; overcomes the shortcomings of active dynamic vibration absorbers such as complex structure, high manufacturing cost, and high energy consumption, and has a simple and compact structure and is easy to install , high safety and reliability, reasonable use of the remaining space under the rail vehicle, it is beneficial to be arranged at the bottom of the rail vehicle, and will not affect the safety of urban rail vehicle operation

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