SU1357085A1 - Vibration exciter - Google Patents

Abstract

The invention relates to a vibration technique and can be used in construction, mining and other fields of industry. The aim of the invention is to improve the reliability of the vibration exciter in operation by balancing the unbalances during the acceleration of the shaft. When the drive is turned on, the electromagnet winding is turned on simultaneously. The electromagnetic interaction of the electrically conductive disk 6 and the electromagnet expands the movable debalance 3 until it stops, thereby balancing it with a fixed unbalance 4. After the acceleration of the shaft 2, the electromagnet winding is turned off and the neutral unbalance 3 is turned on the shaft and aligned with a fixed debalance. 4. The vibratory exciter begins to generate forced vibrations. 1 il.

Description

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The invention relates to vibration technology and can be used in the construction, mining, chemical and other industrial sectors ..

The purpose of the invention is to improve the reliability of the vibration exciter by using induction braking to balance the unbalance during the acceleration of the shaft to maximum speed,

The drawing shows the proposed vibration exciter.

The vibration exciter consists of a housing 1, a shaft 2 on which rotational unbalance 3, fixed unbalance 4, stop 5 are installed, and devices for changing their relative position in the form of an electrically conductive disk 6 mounted on the end surface of the rolling unbalance 3 coaxially with the axis of rotation of the shaft 2 and placed between the poles of an electromagnet (not shown) fixedly mounted on the housing 1.

Vibro works as follows.

When the drive (not shown) is turned on, the shaft 2 simultaneously switches on the electromagnet interacting with the disk 6, in which

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VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

570852

induction current. The induction current generated in the disk 6 as it rotates interacts with the magnetic field of the electromagnet, creating a braking force in the form of the Ampere force acting on the disk 6 and turning debalance 3. The latter turns on the shaft 2 until it stops 5, at this moment the unbalances 3 and 4 are balanced. Acceleration of a balanced vibration exciter occurs. At the end of the acceleration, the device for changing the mutual position rotates the movable unbalance 3 on the shaft 2 and combines with the fixed unbalance 4. The vibration exciter begins to generate forced oscillations.

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Claims (1)

Invention Formula An exciter comprising a housing, a shaft with a rotatable and stationary unbalance, and a device for changing their relative position, characterized in that, in order to increase reliability, it is equipped with an electromagnet fixedly mounted on the housing and an electrically conductive disc mounted on the end surface of the rotary unbalance and placed , between the poles of an electromagnet.