Experimental consideration on accumulator behavior of oil hydraulic breaker.

Mathematical Modelling of a Hydraulic Accumulator for Hydraulic Hybrid Drives

An experimental study on hydraulic behavior of free-surface radial flow in coarse-grained porous media

The equations of fluids in porous media are very useful in designing the rockfill and diversion dams, gabions, breakwaters and ground water reserves. Researches have been showed that the Forchheimer equation is not sufficient for the analysis of hydraulic behavior of free-surface radial flows; because, in these flows, in addition to the hydraulic gradient and velocity, the variable of radius is...

Compressor Suction Accumulator with Pre-Charged Oil

A compressor accumulator based on a different concept from a conventional suction accumulator is proposed. The new accumulator distinguishes itself from the conventional design in that it is pre~ charged with oil. Primary function of an accumulator being storage of excess refrigerant during certain operating conditions of the air conditioning system, this pre~charging may first seems odd, but f...

Effect of Hydraulic Accumulator on the System Parameters of an Open Loop Transmission System

This paper denouements the study of operating parameters of a hydraulic transmission system with and without the application of hydraulic accumulator. In this respect, the hydraulic system, designed in the open circuit mode, consists of the fixed displacement hydraulic pump which gives pressured fluid to the hydro-motor and charges the accumulator as well. The load on the motor is controlled hy...

A new method for the experimental assessment of finger haemodynamic effects induced by a hydraulic breaker in operative conditions.

The haemodynamic effects, in terms of grip force and hand-transmitted accelerations, produced on the fingers of 10 healthy subjects by operation of a hydraulic breaker held with a low or a high grip were investigated with a new experimental set-up. A novel apparatus consisting of a capacitive sensor matrix and a laser Doppler vibrometer was used to measure the two parameters during breaker oper...