BS ISO 10767-1:2015 - Hydraulic fluid power. Determination of pressure ripple levels generated in systems and components. Method for determining source flow ripple and source impedance of pumps

BS ISO 10767-1:2015

Hydraulic fluid power. Determination of pressure ripple levels generated in systems and components. Method for determining source flow ripple and source impedance of pumps

Status : Current, Under review   Published : March 2016

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This part of ISO 10767 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 this part of ISO 10767, 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:

  1. source flow ripple (in the standard “Norton” model) amplitude, in cubic meter per second[m 3/s], and phase, in degree, over 10 individual harmonics of pumping frequency;

  2. source flow ripple (in the modified model) amplitude, in cubic meter per second [m 3/s], and phase, in degree, over 10 individual harmonics of pumping frequency; and its time history wave form,

  3. source impedance amplitude, in Newton second per meter to the power of five [(Ns)/m 5]., and phase, in degree, over 10 individual harmonics of pumping frequency;

  4. blocked acoustic pressure ripple, in MPa (1 MPa = 10 6 Pa) or in bar (1 bar = 10 5 Pa), over 10 individual harmonics of pumping frequency; and the RMS average of the pressure ripple harmonic f1 to f10.




Standard NumberBS ISO 10767-1:2015
TitleHydraulic fluid power. Determination of pressure ripple levels generated in systems and components. Method for determining source flow ripple and source impedance of pumps
StatusCurrent, Under review
Publication Date31 March 2016
Normative References(Required to achieve compliance to this standard)BS ISO 5598:2020, ISO 5598:2020
Informative References(Provided for Information)ISO 15086-2
ReplacesBS ISO 10767-1:1996
International RelationshipsISO 10767-1:2015
Draft Superseded By13/30265678 DC
DescriptorsFlow rates, Pressure measurement (fluids), Hydraulic transmission systems, Accuracy, Positive-displacement pumps, Fluid outlets, Valves, Wave propagation, Fluid equipment, Fluid equipment components, Testing conditions, Fluid inlets, Installation, Calibration, Interpolation, Fluid engineering, Fluid pressure, Flow measurement, Hydraulic equipment, Circuits, Pumps, Power transmission systems, Frequencies, Test equipment, Linearity, Pressure equipment
ICS23.100.10
Title in FrenchTransmissions hydrauliques. Détermination des niveaux d’onde de pression engendrés dans les circuits et composants. Méthode de détermination de l’onde de flux de la source et de l’impédance de la source des pompes
CommitteeMCE/18/-/8
ISBN978 0 580 79399 8
PublisherBSI
FormatA4
DeliveryYes
Pages40
File Size1.493 MB
Price£214.00


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