Electrodynamic vibration shaker

Abstract

The invention discloses an electrodynamic vibration shaker which comprises: a shaker body, a magnetic cylinder, an exciting winding, a moving coil skeleton, a drive coil, a suspension supporting guiding device and a cooling device. A wall-cylinder-type metal winding reel is arranged on a bottom of the moving coil skeleton. The metal winding reel is formed by rolling a stainless steel plate. Through holes are arranged on a surface of the stainless steel winding reel. By using the electrodynamic vibration shaker, moving-coil first-order resonant frequency and moving-coil reliability can be raised; a cooling effect of an air-cooled bench can be increased. The stainless steel winding reel and the moving coil skeleton are fission structures so that components and parts processing difficulty and moving-coil winding technology difficulty can be substantially reduced.

Description

technical field [0001] The invention relates to a vibration test device in an environmental mechanical test, in particular to the bobbin part of an electrodynamic vibration table. Background technique [0002] Electric vibration table is a kind of equipment for vibration simulation test of products or components. Through the test, the anti-vibration performance of a product can be evaluated, which provides a reasonable basis for evaluating the quality of the product. Therefore, it is widely used in aerospace, aviation, ships, automobiles, electronics, etc. , communications, home appliances and instrumentation industries. [0003] The electric vibrating table is designed using the principle of electromagnetic vibration. Its structure is mainly composed of table body, magnetic cylinder, excitation winding, moving coil, suspension support guide device and cooling device. The basic working principle is: the excitation winding placed in the magnetic cylinder is fed with direct c...

AI Technical Summary

Problems solved by technology

[0006] 1. Since the existing technology adopts aluminum or magnesium integral casting, and after forming, it needs to be cut, so the wall thickness of the metal bobbin 4 needs to be designed thicker, which takes up a lot of space. The thickness of the magnetic field air gap is guaranteed during design. It will inevitably reduce the space for winding, on the contrary, in order to ensure the space for winding, the thickness of the magnetic field air gap must be increased;

[0007] 2. The existing technology adopts aluminum or magnesium integral casting. In order to achieve rigidity and facilitate cutting processing, the wall thickness of the metal bobbin 4 needs to be designed thicker, which increases the weight of the moving coil 7 and affects a part of the moving coil 7. order resonance frequency;

[0008] Three, because the prior art metal bobbin 4 is integrally processed, in order to avoid the metal bobbin 4 from producing eddy currents, several grooves must be opened on the metal bobbin 4, thereby reducing the mechanical strength of the metal bobbin 4. strength and stiffness;

[0009] Four, because there is no mesh on the metal bobbin 4 of the prior art, it is unfavorable for the heat dissipation of the moving coil 7 in the forced air-cooled vibrating table

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