A novel pulsation compensator for displacement machines
Sprache des Vortragstitels:
Englisch
Original Tagungtitel:
14. IFK - International Fluid Power Conference, Dresden, Germany, 19-21 March, 2024
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
This paper presents a mechanical compensator for hydraulic pressure pulsations induced by a pump or motor. The compensator is based on the combination of pump or motor mass moment of inertia and the torsional compliance of the adjacent coupling. According to the displacement volume, angular deflections of the resulting oscillator correspond to volumes which can compensate for geometric or dynamic pulsations at the natural frequency of the oscillator. Two design concepts are suggested for the coupling. Three models are set up for various configurations of the overall system, accounting for limited inertia of an electric motor and the influence of an outlet pipeline. Model parameters are determined for a 32 ccm radial piston pump and a 250 ccm axial piston pump. Torsional damping from viscous friction is roughly estimated and considered by different levels. At the pump outlet, frequency response functions between flow rate excitation and pressure response are calculated. The results show that the compensation effect is relevant for both pumps and particularly robust with respect to resonances in the hydraulic system.
Forschungs-