BS ISO 10767-1:1996

Hydraulic fluid power. Determination of pressure ripple levels generated in systems and components. Precision method for pumps | Status: Revised, Superseded, Withdrawn

1 Scope This part of ISO 10767 specifies a procedure for the determination of a rating of the source flow ripple, source impedance and pressure ripple levels generated by positive-displacement hydraulic pumps. Ratings are obtained as the following:

1. a) the source flow ripple amplitude, in litres per second, over ten individual harmonics of pumping frequency;
2. b) the source impedance amplitude, in newton seconds per metre to the power of five [(N·s)/m5], and phase, in degrees, over ten individual harmonics of pumping frequency;
3. c) the anechoic pressure ripple amplitude, in bars1), over ten harmonics of pumping frequency;
4. d) the overall r.m.s. anechoic pressure ripple, in bars;
5. e) the blocked acoustic pressure ripple amplitude, in bars, over ten harmonics of pumping frequency;
6. f) the overall r.m.s. blocked acoustic pressure ripple, in bars.

This part of ISO 10767 is applicable to all types of positive-displacement pump operating under steady-state conditions, irrespective of size, provided that the pumping frequency is in the range from 50 Hz to 400 Hz.