Moving part guiding device for vibration table

Abstract

The invention relates to a vibration test device, and particularly discloses a moving part guiding device for a vibration table. The device comprises an upper guiding shaft, a lower guiding shaft, an upper hydrostatic bearing and a lower hydrostatic bearing, wherein the upper guiding shaft is arranged on the upper portion of a movable coil, the lower guiding shaft is mounted at the bottom of the movable coil, the upper hydrostatic bearing is installed at the top of an iron core, and the lower hydrostatic bearing is positioned at the bottom of the iron core. The upper hydrostatic bearing is sleeved outside the upper guiding shaft, and the lower hydrostatic bearing is sleeved outside the lower guiding shaft. According to the moving part guiding device for the vibration table, the anti-overturning moment capacity can be improved, eccentric large test-piece vibration test requirements are met, influences produced by large installation space of common bearing guiding devices on vibration table magnetic fields are avoided, and a good vibration table movable coil guiding function is achieved.

Description

technical field [0001] The invention belongs to vibration test equipment, in particular to a vibration table moving part guiding device for an electric vibration table. Background technique [0002] The electric vibrating table is a vibration generating device designed according to the principle of electromagnetic induction. As a kind of vibration test equipment, the vibrating table can be used together with a power amplifier and a controller to complete reliability tests such as sine, random and shock, thereby simulating the real use environment of the product. vibration. [0003] The body of the electric vibrating table is mainly composed of excitation coil, moving coil, magnet, supporting and carrying device, upper and lower guiding device of moving coil, cooling system and so on. During the test, the specimen is installed on the moving coil table for vibration test. During the vibration process, the moving coil moves in the direction of the vertical table, and the upper...

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Problems solved by technology

However, ordinary roller and bearing moving coil guides can no longer meet the requirements of the eccentric load test on the shaking table. To improve the guiding ability of the bottom guiding structure, it is necessary to expand the installation space of the bottom guiding structure, which will affect the magnetic field of the shaking table. The characteristics have a certain influence, and at the same time, the ball bearing or nylon bearing and the guide shaft will wear to a certain extent after the system works for a long time, resulting in distortion of the vibration waveform, which will affect the result of the vibration test in severe cases

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