Experimental bladder accumulator based passive resonator

Ville Närvänen

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

16 Lataukset (Pure)

Abstrakti

Abstract. Several industrial rotor systems utilize hydraulic cylinders for adjustable support structures. Such systems are, for example, conveyer belts and paper winders. These rotors systems can experience vibrations due to asymmetries in the rotating bodies themselves or unsteady loads generated by moving materials. Typically, hy-draulic cylinders are of lower dynamic stiffness compared to the mechanical struc-tures, which makes then susceptible to vibrations. This makes increasing the dynamic stiffness of hydraulic cylinders beneficial for the operation of several rotor systems.
If an accumulator is in direct connection with a hydraulic cylinder chamber via an open fluid line, a hydraulic equivalent of a mass-spring system with a damper is cre-ated. This system will be referred as hydraulic resonator in this paper. Resonator has a direct effect on the dynamic stiffness of the hydraulic cylinder, depending on oscil-lation frequency, fluid line length, accumulator throat dimensions, accumulator vol-ume and accumulator charge pressure. By modifying the aforementioned attributes, the hydraulic cylinder’s dynamic stiffness in response to a specific frequency vibra-tion can be lowered or increased.
In this research, experimental hydraulic passive resonator is simulated and con-structed. It’s effect on hydraulic cylinders dynamic stiffness characteristics are measured and compared to baseline values. Depending on cylinder chamber volume and excitation frequency, resonator increases the dynamic stiffness by a factor of 4 to 10 times that of baseline stiffness. Outside optimal frequencies, dynamic stiffness is lowered compared to baseline.
AlkuperäiskieliEnglanti
OtsikkoGFPS PhD Symposium
TilaHyväksytty/In press - 2024
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaGlobal Fluid Power Society PhD Symposium - Hudiksvall, Ruotsi
Kesto: 17 kesäk. 202420 kesäk. 2024
https://liu.se/en/research/gfps2024

Conference

ConferenceGlobal Fluid Power Society PhD Symposium
LyhennettäGFPS
Maa/AlueRuotsi
KaupunkiHudiksvall
Ajanjakso17/06/202420/06/2024
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