SU1430116A1 - Hydrodynamic vibration exciter - Google Patents

Abstract

The invention relates to devices for vibration technology and can be used in the field of mechanical engineering, in particular in devices for testing structures and materials for the effect of vibration loads. The aim of the invention is to increase work efficiency by stabilizing the oscillation frequency. The hydrodynamic vibration exciter is equipped with a spool that is installed with the possibility of rotation around the axis and providing alternate connection of the drain and discharge cavities with the working chambers of the cylinder. 1 hp ff, 1 ill.

Description

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The invention relates to mechanical engineering and can be used to test structures and materials with vibration loads.

The purpose of the invention is to increase the efficiency of operation by reducing the influence of hydrodynamic transient processes on the nature of oscillations.

The drawing shows a hydrodynamic vibration exciter.

The device comprises a hollow body 1c of the discharge cavity 2 and the discharge of 3 working tons. In case 1 cylinder 4 is placed with bypass channels 5-8. The cylinder 4 is placed by the piston 9 on the working chambers 10 III1. The piston 9 is rigidly connected by the rod 12 with the additional piston 13 of the pneumatic cylinder 14. The valve 15 is disposed between the housing 1 and the cylinder 4 and 4 with bypass channels 16-19, kinematically connected with the electric actuator 20.

; The device works as follows.

At the initial moment, the bypass channels 5 and 6 of cylinder 4 are closed, and channels 7 and 8 are open. Through the pumping cavity 2, the bypass channel 19 of the spool 15 and the bypass channel 7 of the cylinder 4, the working body enters the working chamber 11 of the cylinder 4. The piston 9 together with the rod 12 moves upwards and the working body through the bypass channel 8 of the cylinder 4, the bypass channel 18 of the spool 15 and cavity 3 drain from the working chamber 10 is released into the atmosphere. Simultaneously with the movement of the piston 9 upwardly, the electric actuator 20 turns on the spool 15, opening the bypass channels 5 and 6 and closing the channels 7 and 8 of the cylinder 4.

The working fluid through the cavity 2 of the injection - PIA, the bypass channel 16 of the spool 15 and

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The bypass channel 5 of the cylinder 4 is injected into the chamber 10 of the cylinder 4. The piston 9 is mixed downwards and the working body of the chamber 11 through the bypass channel 6 of the cylinder 4, the bypass channel .17 of the spool 15 and the cavity 3 of the drain comes to the atmosphere. Spool 15 continues to attack. The bypass channels 5 and 6 of the cylinder 4 are closed, and the channels 7 and 8 of the cylinder 4 are opened, and the cycle is repeated, while the additional piston 13 is loaded, compensating for the static load on the piston 9, resulting in equality of forward and reverse moves.

Claims (2)

1. Hydrodynamic vibration exciter comprising a hollow body with supply and discharge channels for the working fluid and discharge and discharge cavities, a cylinder coaxially placed in it with overflow channels, a piston divided into two working chambers, a rod rigidly connected to it and an electric actuator differing so that, in order to increase efficiency by stabilizing the oscillation frequency, it is equipped with a spool located between the housing and the cylinder with the possibility of turning around the axis of the latter, separating the cavity of the discharge and injection One from the other, connected to the electric drive and having channels communicating with the bypass channels of the cylinder, and the cylinder rigidly connected to the housing. 2. The vibration exciter according to Claim 1, characterized in that, in order to increase reliability, it is provided with an additional cylinder and a piston fixed in it rigidly connected to the rod.