Dual valve-controlled symmetrical electro-hydraulic exciter, its electro-hydraulic excitation system and bias control method

Abstract

The invention discloses a dual valve control symmetrical electrohydraulic vibration exciter which comprises a hydraulic executive element and a vibration excitation control valve for controlling operation of the hydraulic executive element, wherein the vibration excitation control valve comprises two rotary valves; the rotary valves comprise valve bodies; oil inlet groups and oil return port groups are arranged on the valve bodies; the oil inlet groups comprise first oil inlets and second oil inlets; the oil return port groups comprise first oil return ports and second oil return ports; valvebushes are mounted in the valve bodies in a sleeving manner; valve plugs are arranged in the valve bushes; a linear motor is arranged at one end of each valve body; a driving mechanism is arranged between the two rotary valves; the first oil inlets of the two rotary valves are connected with an oil supply circuit; the second oil inlet of one rotary valve is connected with an oil port A; the secondoil return port of the rotary valve is connected with an oil port B; the second oil inlet of the other rotary valve is connected with the oil port B; and the second oil return port of the rotary valve is connected with the oil port A. The invention further discloses a dual valve control symmetrical electrohydraulic vibration excitation system and a bias control method.

Description

technical field [0001] The invention belongs to the technical field of fluid pressure actuators, in particular to a dual valve-controlled symmetrical electro-hydraulic exciter, an electro-hydraulic excitation system and a bias control method thereof. Background technique [0002] The vibrator is an important device that uses mechanical vibration by applying a certain form and size of excitation to make the excited object obtain corresponding vibrations, and the bias control of the vibrator is to control the exciter around the deviation of the hydraulic actuator ( hydraulic cylinders or hydraulic motors) to balance the vibration at a specific distance from the position. [0003] According to the different excitation methods, the exciter is mainly divided into mechanical type, electric type, electrostrictive or magnetostrictive effect type and electro-hydraulic type. Among them, the electro-hydraulic exciter has inherent advantages such as large power, large thrust, and conven...

AI Technical Summary

Problems solved by technology

In the absence of bias control, on the one hand, when the center of excitation deviates from the equilibrium position of the piston, it cannot be corrected; Working condition of shifting vibration

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