Large-displacement electric vibration table

Abstract

The invention relates to a large-displacement electric vibration table comprising a cable body, a moving coil which is arrange at the center of the table body and can move upwardly and downwardly, a DC excitation device, suspension support members, a flexible air bag and a moving coil support base which bear and support the bottom part of the moving coil, a guide shaft and a driving circuit. The moving coil is composed of a bobbin and a driving coil. Circumferential moving coil rib plates are integrally arranged on the upper end of the bobbin. Multiple upward limiting wedge plates are fixedly arranged on the table body in a way of being corresponding to the moving coil rib plates. The suspension support members are multiple U-shaped elastic arms which are arranged in a way of surrounding the moving coil and connected between the table body and the upper part of the moving coil. The excitation device mainly comprises a magnetic cylinder, upper and lower excitation coils, an upper pole plate and a lower pole plate. The large-displacement electric vibration table is characterized in that the length of the guide shaft is increased for 10-12mm in comparison with the length of the present guide shaft; the collision stroke of the wedge plates and the moving coil rib plate limiting edges is increased for 10-12mm in comparison with the present collision stroke; and the stretching length of the U-shaped elastic arms is increased for 10-12mm in comparison with the stretching length of the present U-shaped elastic arms.

Description

technical field [0001] The invention relates to the technical field of mechanical environmental tests, in particular to a large-displacement electrodynamic vibrating table. Background technique [0002] The electric vibration table is used to simulate the vibration environment of electrical and electronic products in the process of transportation, storage and use in the laboratory, and to test the vibration resistance of the products. It is widely used in aviation, aerospace, electrical engineering, electronics, instrumentation, medical treatment, machinery and other industries. [0003] The electric vibrating table is a vibrating table driven by the electromotive force generated by the interaction of a constant DC magnetic field and a coil with a certain alternating current in the magnetic field. Its structure mainly includes the table body, the moving coil set in the center of the table body that can move up and down, the excitation device surrounding the moving coil to pr...

AI Technical Summary

Problems solved by technology

With the rapid development of various industries such as aerospace, some components require a large displacement identification test with an effective stroke peak-to-peak value ≥ 100mm in the development stage, and the existing hydraulic vibration table cannot meet the test requirements.

Images