Electric-hydraulic vibration exciter based on magnetostrictive driving

Abstract

The invention provides an electric-hydraulic vibration exciter based on magnetostrictive driving, which solves the problem that the excitation frequency of an existing electric-hydraulic vibration exciter is low. The electric-hydraulic vibration exciter comprises a double-rod hydraulic cylinder which is connected with a to-be-excited body through a piston rod, two piezoelectric ceramic driven two-position three-way reversing valves which are respectively connected with a left oil cavity and a right oil cavity of the double-rod hydraulic cylinder, a magnetostrictive driving pump which is connected with the two piezoelectric ceramic driven two-position three-way reversing valves, two one-way valves which have different opening directions and are arranged on the magnetostrictive driving pumps, and an energy accumulator which is arranged between one one-way valve with an inward opening and one piezoelectric ceramic driven two-position three-way reversing valve, wherein the magnetostrictive driving pump comprises an oil cylinder and a magnetostrictive driver; the oil cylinder and the magnetostrictive driver are separated by an elastic mebrane and are packaged into a whole through a shell; and the two one-way valves are connected with the two piezoelectric ceramic driven two-position three-way reversing valves. According to the electric-hydraulic vibration exciter disclosed by the invention, rapid responding can be realized by magnetostriction and piezoelectric ceramics, so that high-frequency excitation output can be realized.

Description

technical field [0001] The invention relates to the technical field of vibration testing, in particular to an electro-hydraulic vibrator driven by magnetostriction. Background technique [0002] The vibration characteristics of materials and structures are related to their mechanical properties. Therefore, vibration testing has become a basic test in modern industry and has gradually become an important means of product development. It is widely used in many important engineering fields, such as road simulation of automobiles and walking machinery Test, fundamental frequency test of large equipment, anti-vibration fatigue test of engineering materials, dams and high-rise buildings, etc. [0003] There are mainly three types of excitation methods: mechanical, electric and electro-hydraulic. Among them, the mechanical vibration table has the advantages of simple structure and low cost. Large and has the disadvantages of mechanical clutter; the electric vibration table has the...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low excitation frequency in existing electro-hydraulic exciters, the present invention provides an electro-hydraulic exciter based on magnetostrictive drive

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