SU1498559A1 - Vibration exciter - Google Patents

Abstract

The invention relates to devices for exciting oscillations and can be used as a vibration exciter in agriculture, in food, construction, chemical and other sectors of the national economy. The aim of the invention is to increase efficiency by increasing the spectrum of amplitude-frequency characteristics during operation. In operation, the electromagnet 10 controls, via the spool regulator 7, the communication of the cavities 5 and 6 of the cylinders 2 among themselves. Periodic communication of cavities 5 and 6 between each other ensures the specified mode of operation. The piston 3 under the action of centrifugal forces, overcoming the force of the spring 4, moves, which causes the appearance of vibration. The amplitude of vibration increases with increasing distance between the piston 3 and the drive shaft 1. When the desired amplitude is reached using the controller 7, the process of changing the position of the piston 3 relative to the drive shaft 1 is stopped. 1 Il.

Description

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The invention relates to devices for the excitation of vibrations and can be used as a vibration exciter in agriculture, food, construction, chemical and other sectors of the national economy.

The purpose of the invention is to increase efficiency by increasing the spectrum of amplitude-frequency characteristics during operation.

The drawing shows the vibration exciter.

The vibration exciter consists of a drive shaft 1, cylinders 2 rigidly attached to it, located symmetrically with respect to the drive shaft 1. In the cylinder 2 there are pistons 3, return springs 4 with different stiffness. Cylinder cavities are filled with working fluid. Sub-piston 5 and over-piston 6 cavities are interconnected through a spool regulator 7 with connecting tubes Sj which are equipped with adjusting valves 9. The spool regulator 7 is controlled by an electromagnet 10.

The vibration exciter operates as follows.

In the initial position, the cavities 5 and 6 of the cylinders are separated by the spool regulator 7. When the vibrator is put into operation, the resonant frequency of the vibration exciter passes in a balanced state. Further, the electromagnet 10 controls the spool regulator 7, periodically together with each other, the cavities 5 and 6 of the cylinders 2, providing the desired mode of operation.

1 When the cavity 5 and 6 communicate with each other through the spool regulator 7 and the connecting pipes 8, the piston 3 under the action of centrifugal forces, having overcome the force of the spring 4, having less rigidity, moves. The working fluid from the cavity 6 through the connecting tubes 8 and zolotniko

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The rotary regulator 7 moves into the cavity 5 of the cylinder 2. Moving only one piston causes the appearance of vibragesch. The vibration amplitude increases with increasing distance between the piston 3 and the drive shaft U. When the required amplitude is reached by means of the regulator 7, the process of changing the position of the piston 3 relative to the drive shaft 1 is stopped.

To reduce the vibration amplitude of the vibration exciter by the controller 7 and the electromagnet 10, the piston 3 is moved with the spring 4 of greater rigidity to a certain position while the piston 3 is fixed with the spring 4 of lesser rigidity.

To stop the driver, both pistons 3 are pre-moved, compressing the spring 4 in a position corresponding to one of the balanced states of the vibration exciter.

Claims (1)

Invention Formula A vibration exciter containing a drive shaft with an unbalance, made in the form of rigidly connected with the shaft and placed two hollow cylinders symmetrically with respect to its axis of rotation and installed in each of them with the possibility of axial movement,. eccentric weights and springs of different stiffness, placed each between the bottom of the cylinder and the eccentric a load, characterized in that, in order to increase efficiency, it is provided with a control device made in the form of an electromagnet and a spool regulator connected to it, the cavities of the cylinders are filled with working fluid, and the eccentric load is thickened As a result, the piston separating the cylinder into two cavities interconnected through a spool regulator. Corrector S.Cherni Order 4490/8 Circulation 421 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Subscription