Low compressibility of ionic liquids and its effects on pulsation within hydraulic system
Sprache des Titels:
Fluid power networks : proceedings : 19th - 21th March 2018 : 11th International Fluid Power Conference, [Bd.] Vol. 1
The paper presents possible use of Ionic Liquids as a lubricant suitable for use as a hydraulic fluid. After a short presentation of ionic liquids and their interesting properties, the paper focuses on very low compressibility (resp. very high Bulk modulus) of ILs compared to the common hydraulic mineral oils and investigates the effects of their high bulk modulus on pressure pulsation and flow ripple of hydraulic pump.
Two most adequate ionic liquids for hydraulic application with highest bulk modulus where chosen and a special test rig was built using bent axis 7-piston pump powered by a servo motor. Results show change of resonance frequencies of entire hydraulic system due to higher bulk modulus and higher density of the ionic liquids. On the other hand, there is no significant change in pump pressure pulsation in non-resonance frequency range below 2500 rpm.