Long-stroke moving coil structure for electrodynamic shaker

Abstract

The invention relates to the technical field of electrodynamic vibration generator for testing, and specifically discloses a long-stroke drive coil structure for an electrodynamic vibration generator. The long-stroke drive coil structure designs a structure for fixing a drive coil in the vibration generator as a form including upper and lower bracing frames which form a double bracing frame structure so that the drive coil can be rolled between the upper and lower bracing frames. The two bracing frames are fixed through a connection rod, and transmit the exciting force so that the connection strength after lengthening of the drive coil of the vibration generator and the transmission of force are not influenced; therefore the drive coil and the drive coil bracing frames do not release from the skeleton because of low bonding intensity between the drive coil and the drive coil bracing frames so as to prevent damaging of the drive coil; at the same time, the guiding mode of the drive coil is modified; guiding bars are respectively arranged on the drive coil bracing frames to realize overall guiding of the drive coil structure and to improve the guiding performance; and the lower guiding bar is also provided with a lead slot so that a wiring function is also provided and a service conductor of the drive coil can be led out reliably and the whole vibration generator can stably and safely work.

Description

technical field [0001] The invention relates to the field of mechanical environment test equipment, in particular to a long-stroke moving coil structure used for an electric vibrating table. Background technique [0002] At present, the maximum displacement peak-to-peak value of the electric vibration table for vibration or impact test is only 100mm. When it is necessary to do a large displacement vibration or impact test of more than 100mm, the ordinary electric vibration table cannot meet the requirements. To develop a vibration table with a large displacement, it is necessary to increase the length of the driving coil of the moving coil to ensure that the coil of the moving coil is always in the working air gap during the movement, that is, to ensure that the effective number of turns of the coil remains unchanged. However, if the coil is too long, it will not only affect the transmission of the exciting force and cause force attenuation, but also increase the weight of ...

AI Technical Summary

Problems solved by technology

Although this invention solves the problem of moving coil guidance during long strokes, the linear bearing-type guidance does not limit the axial rotation of the moving coil, and the moving coil will twist during operation; while the roller-type guidance is through the contact between the plane of the support rod and the roller. Linear contact realizes rolling guidance, small contact area, and low lateral stiffness

In addition, this device is only guided by the central support rod, and the stability is poor

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