An Adjustable Self-excited Oscillation Device for Suppressing Servo Valve

Abstract

The invention discloses an adjustable suppression servo valve self-exciting oscillation device and belongs to the field of hydraulic techniques. The adjustable suppression servo valve self-exciting oscillation device comprises a connecting block and a filtering mechanism. The filtering mechanism is vertically installed on the connecting block in a threaded connection mode. One end of the connecting block is connected with an integration block, the other end of the connecting block is connected with a servo valve, and the joints at the two ends of the connecting block are both sealed with first sealing rings. The filtering mechanism comprises a fixed cylinder body, a movable cylinder body, a piston and an inflation valve. One end of the fixed cylinder body is in threaded connection with the connecting block, the other end of the fixed cylinder body is in threaded connection with the movable cylinder body, and the joints are sealed with third sealing rings. The movable cylinder body is positioned in the radial direction of the fixed cylinder body through a locknut, and the end of the movable cylinder body is connected with the inflation valve. The piston is installed inside the fixed cylinder body. The adjustable suppression servo valve self-exciting oscillation device is simple in structure, convenient to install and low in manufacturing cost, does not change the mechanism and performance of an original hydraulic system, obviously improves pressure fluctuation of the hydraulic system, adjusts the volume of an air cavity, and adapts to pressure fluctuation under different working conditions and different frequencies.

Description

technical field [0001] The invention relates to the field of hydraulic technology, and more specifically relates to an adjustable device for suppressing self-excited oscillation of a servo valve. Background technique [0002] The hydraulic system is developing in the direction of miniaturization and integration in aviation, aerospace, military and other fields. The pumps, hydraulic cylinders and other components of the hydraulic system are integrated in the integrated block. This structure will lead to more prominent pressure fluctuations in the hydraulic system. The servo valve used in the hydraulic system is particularly susceptible to the self-excited oscillation phenomenon caused by the pressure fluctuation disturbance. The self-excited oscillation phenomenon of the servo valve is commonly known as howling. It is usually a high-frequency oscillation, and it is particularly easy to damage the supports and other parts in the servo valve. In turn, the servo valve and the en...

AI Technical Summary

Problems solved by technology

At present, the commonly used method for this phenomenon is to replace the entire servo valve, which will not only greatly increase the cost, but also cannot eradicate the howling phenomenon; lowering the system pressure will improve this phenomenon under certain working conditions, but it will reduce the performance of the system. low stability

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