SU1624296A1 - Electrodynamic vibrational test stand - Google Patents

Abstract

This invention relates to a technique for testing vibration and fatigue strength. The purpose of the invention is to increase the efficiency of excitation. The vibration table contains a magnetic core, made in the form of two horseshoe-shaped magnets facing each other with the same poles. The windings 5 of the magnetic bias magnetically are connected with a constant current. At the ends of the core winding 3 excitations are placed, wound oppositely. The rigid connection of the core with the free end of a cantilever resonator provides the excitation of bending oscillations in the latter. 2 or

Description

The invention relates to a technique for testing vibration and fatigue strength.

The purpose of the invention is to increase the efficiency of excitation of bending vibrations of a cantilever resonator.

FIG. I and 2 show two projections of the electrodynamic stand exciter.

The cantilever resonator 1 is connected by its free end to the core 2, on which are placed the windings 3 of the impulses placed between the poles of the horseshoe-shaped magnetic lines 4 with the windings 5 of magnetizing. Magni-conduits are stationary on the base 6.

The device works as follows.

The bias magnetizations are read by direct current in such a way that the poles facing each other are underconverted

and ;: - they have the same polarity. An alternating current is applied to the windings wound at the ends of the core, which are wound in opposite windings, which are connected after the post-1 afterwards. Due to the counter winding of the excitation windings 5, both sides of the magnetic field of the magnetic cores 4 are affected by forces pushing the core in one direction. Since core 2 is rigidly connected to the free end of a cantilever resonator, the latter experiences flexural vibrations. Formupa invention

An electrodynamic vibration table containing a magnetic core with bias windings, a core movable relative to the magnitowires with excitation windings at its ends, due to the fact that, in order to increase the excitation efficiency, the magnetic circuit is

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horseshoe-shaped magnets, facing the free end of a cantilever friend to a friend with the same poles, a torus having a large mobility

The core is made in the form of a rectangular direction, perpendicular to the plane-parallel box and rigidly attached to the 5th excitation windings.

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Claims (1)

Claim An electrodynamic vibrostand containing a magnetic circuit with magnetization windings, movable relative to core cores with field windings at its ends, characterized in that, in order to increase the excitation efficiency, the magnetic circuit is made in the form of two i horseshoe magnets facing each other with the same poles, the core is made in the form of a rectangular parallelepiped and is rigidly attached to the $ free end of the cantilever resonator, which has great mobility in the direction perpendicular to the plane of the field windings. Figure 1