Reduction of Pressure Pulsations over a Wide Frequency Range in Hydrostatic Systems

This article points out some of the forces acting on the components of a hydraulic system. These forces can lead to changes in the spectrum of pressure pulsations under certain conditions. These forces can originate from outside the hydraulic valve and can be the result of vibrations in the machine frame or the movement of the machine over uneven ground. In addition, an immanent feature of an operating hydraulic system is the pressure pulsation resulting from the pulsation of the output. This is caused by the kinematics of the pump’s displacement components and the impedance of the hydraulic system. A method of determining the amplitude of the pressure pulsation created by the pulsation of the pump performance is presented. It was pointed out that the frequency of the resulting pressure pulsation can vary depending on the type of forcing. Often, the frequency range of pressure pulsation is wide. This study presents the concept of a pressure pulsation damper operating over a wide frequency range. By reducing the amplitudes of pressure pulsations, a reduction in the operating noise of the hydraulic system is also achieved.