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ISO 10767-1:2015

Current
Current

The latest, up-to-date edition.

Hydraulic fluid power — Determination of pressure ripple levels generated in systems and components — Part 1: Method for determining source flow ripple and source impedance of pumps
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

French, English

Published date

29-09-2015

ISO 10767-1:2015 establishes a test procedure for measuring the source flow ripple and source impedance of positive-displacement hydraulic pumps. It is applicable to all types of positive-displacement pumps operating under steady-state conditions, irrespective of size, provided that the pumping frequency is in the range from 50 Hz to 400Hz.

Source flow ripple causes fluid borne vibration (pressure ripple) and then airborne noise from hydraulic systems. This procedure covers a frequency range and pressure range that have been found to cause many circuits to emit airborne noise which presents a major difficulty in design of hydraulic fluid power systems. Once the source flow ripple and source impedance of hydraulic fluid power pump are known, the pressure ripple generated by the pump in the fluid power system can be calculated by computer simulation using the known ripple propagation characteristics of the system components. As such, this part of ISO 10767 allows the design of low noise fluid power systems to be realized by establishing a uniform procedure for measuring and reporting the source flow ripple and the source impedance characteristics of hydraulic fluid power pumps.

In ISO 10767-1:2015, calculation is made for blocked acoustic pressure ripple as an example of the pressure ripple. An explanation of the methodology and theoretical basis for this test procedure is given in Annex B. The test procedure is referred to here as the two pressures/two systems method. Ratings are obtained as follows:

a) source flow ripple (in the standard "Norton" model) amplitude, in cubic meter per second[m3/s], and phase, in degree, over 10 individual harmonics of pumping frequency;

b) source flow ripple (in the modified model) amplitude, in cubic meter per second [m3/s], and phase, in degree, over 10 individual harmonics of pumping frequency; and its time history wave form,

c) source impedance amplitude, in Newton second per meter to the power of five [(Ns)/m5]., and phase, in degree, over 10 individual harmonics of pumping frequency;

d) blocked acoustic pressure ripple, in MPa (1 MPa = 106 Pa) or in bar (1 bar = 105 Pa), over 10 individual harmonics of pumping frequency; and the RMS average of the pressure ripple harmonic f1 to f10.

Committee
ISO/TC 131/SC 8
DevelopmentNote
Supersedes ISO/DIS 10767-1. (09/2015)
DocumentType
Standard
Pages
28
PublisherName
International Organization for Standardization
Status
Current
Supersedes

Standards Relationship
JIS B 8349-1:2017 Identical
UNI ISO 10767-1:2016 Identical
UNI ISO 10767-1 : 1999 Identical
NF ISO 10767-1 : 2015 Identical
BS ISO 10767-1:2015 Identical

BS ISO 4413:1998 Hydraulic fluid power. General rules relating to systems
ISO 20155:2017 Ships and marine technology — Test method of flow induced in-pipe noise source characteristics for a ship-used pump
00/707842 DC : DRAFT APR 2000 ISO/CD 17559 - HYDRAULIC FLUID POWER - TEST METHOD FOR ELECTRICITY CONTROLLED OIL HYDRAULIC PUMPS
BS ISO 20155:2017 Ships and marine technology. Test method of flow induced in-pipe noise source characteristics for a ship-used pump
BS ISO 17559:2003 Hydraulic fluid power. Electrically controlled hydraulic pumps. Test methods to determine performance characteristics
SAE J 1776 : 2014 MARINE VEHICLES - HYDRAULIC SYSTEM PUMPS AND MOTORS - DESIGN AND SPECIFICATION GUIDE
17/30317139 DC : 0 BS ISO 20155 - SHIPS AND MARINE TECHNOLOGY - TEST METHOD OF FLOW INDUCED IN-PIPE NOISE SOURCE CHARACTERISTICS FOR A SHIP-USED PUMP
SAE J 1782 : 2013 SHIP SYSTEMS AND EQUIPMENT - HYDRAULIC SYSTEMS - NOISE CONTROL
ISO 17559:2003 Hydraulic fluid power — Electrically controlled hydraulic pumps — Test methods to determine performance characteristics
ISO 10767-2:1999 Hydraulic fluid power Determination of pressure ripple levels generated in systems and components Part 2: Simplified method for pumps
BS ISO 10767-2:1999 Hydraulic fluid power. Determination of pressure ripple levels generated in systems and components Simplified method for pumps

ISO 5598:2008 Fluid power systems and components Vocabulary
ISO 15086-2:2000 Hydraulic fluid power — Determination of the fluid-borne noise characteristics of components and systems — Part 2: Measurement of the speed of sound in a fluid in a pipe

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