Double valve load independent control type electro-hydraulic exciter, electro-hydraulic excitation device and bias control method thereof

Abstract

The invention discloses a dual valve load independent control type electro-hydraulic vibration exciter which comprises a hydraulic executing element and a vibration excitation control valve. The hydraulic executing element is provided with an oil port A and an oil port B, and the vibration excitation control valve comprises two rotary valves. Each rotary valve comprises a valve body, wherein the valve body is provided with an oil inlet set and an oil return port set, a valve bush is arranged in the valve body in a sleeved mode, a valve element is arranged in the valve bush, and one end of thevalve body is provided with a linear motor. First oil inlets of the two rotary valves are connected with an oil supply path, first oil return ports of the two rotary valves are connected with an oil return path, the second oil inlet and the second oil return port of one rotary valve are connected with the oil port A, the second oil inlet and the second oil return port of the other rotary valve areconnected with the oil port B, and when the opening between the oil inlet set of one rotary valve and a first through flow valve port is larger than 0, the opening between the oil return port set ofthe other rotary valve and a second through flow valve port is larger than 0. The invention further discloses a dual valve load independent control type electro-hydraulic vibration excitation device and a bias control method.

Description

technical field [0001] The invention belongs to the technical field of fluid pressure actuators, and in particular relates to an electro-hydraulic vibration device with independent load control for double valves, an electro-hydraulic vibration device 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 la...

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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