SU1606201A1 - Electric mechanical vibration exciter - Google Patents

Abstract

The invention relates to vibration technology and allows to simplify the design and expand the operational capabilities of the device. The vibration exciter contains a reactive mass 1 with an electromagnet 4 installed on it. Measuring 6 is placed on the active mass 3. Subharmonic oscillation modes are realized due to the presence of elastic stops 5 on the reactive mass 1, which limit the movement of the active mass in the direction of electromagnet 4. 2 Il.

Description

Phie.

The invention relates to a vibration technique and can be used in those industries where mechanical vibrations are used.

The purpose of the invention is to simplify the design and expand the operational capabilities of the device.

FIG. 1 shows the device, a general view; in fig. 2 - strength characteristic of the elastic system.

The vibration exciter consists of a reactive mass (stator) 1, to which an active mass 3 is attached through an elastic system 2. An electromagnet 4 and elastic stops 5 are mounted on the reactive mass 1, and a measles 6 is placed on the active mass 3.

When the electromagnet is turned on, an alternating electromagnetic force arises in it that acts on the bark 6 with the frequency of the mains supply. Under the action of this force, the measles 6 with the active mass 3, after a short transient process, begin to make stable subharmonic oscillations with a frequency that is n times lower than the frequency of the excitation. The elements of the elastic system work only for stretching.

The stiffness of the elastic system 2 for the implementation of a given subharmonic mode is determined by the formula

( - . P

0

where C is the stiffness of the elastic system;

m is the mass of the core and the reactive mass;

f-frequency power of the electromagnet;

p is the order of the subharmonic mode. The implementation of subharmonic modes is carried out due to the presence of elastic stops 5, since the restoring force acting on the active mass 3 has a bilinear elastic characteristic. The stiffness of the stops 5 is determined from

Cy / ,.

The purpose of the elastic stops 5 is

ensuring the conversion of high frequency oscillations of the supply voltage into

low frequency oscillations of the working organ.

Claims (1)

Invention Formula An electromechanical vibration exciter comprising an electromagnet mounted on a reactive mass connected through an elastic system to an active mass on which measles is installed, characterized in that, in order to simplify the design and expand its operational capabilities, it is provided with elastic stops mounted on the reactive mass with the possibility limiting the movement of the active mass in the direction of the electromagnet.