ISO 10767-2-1999 PDF

Full title and description

Hydraulic fluid power — Determination of pressure ripple levels generated in systems and components — Part 2: Simplified method for pumps. This International Standard specifies a simplified test procedure for measuring pressure-ripple characteristics produced by hydraulic pumps, enabling consistent reporting of fluid-borne pressure ripple with minimal post-processing.

Abstract

This part of ISO 10767 provides a simplified, repeatable test method for measuring the fluid-borne pressure ripple generated by positive-displacement hydraulic pumps. It is intended as a practical procedure that yields pressure-ripple data with limited data processing and with an expected measurement uncertainty broadly suited to system designers and test laboratories. The procedure covers a range of frequencies and pressures commonly associated with airborne noise generation in hydraulic systems and includes explanatory material on the origin and use of the test method.

General information

• Status: Published; confirmed (last systematic review confirmed the edition).
• Publication date: October 1999 (ISO publication: 1999-10; catalog listings give 7 October 1999).
• Publisher: ISO — International Organization for Standardization.
• ICS / categories: 23.100.10 (Pumps and motors).
• Edition / version: Edition 1 (1999).
• Number of pages: 20 pages.

Scope

Specifies a simplified measurement procedure for determining pressure ripple levels generated by hydraulic pumps (positive-displacement types) under steady-state operating conditions. The scope covers frequencies and pressure ranges found to be relevant to noise emission from hydraulic circuits and is intended to provide data suitable for use by pump manufacturers, system designers and noise/vibration specialists. The procedure is presented as a practical alternative to the more precise (but more complex) methods given elsewhere in the ISO 10767 series.

Key topics and requirements

• Definition of test setup and measurement points for pressure-ripple acquisition on pump discharge lines.
• Procedures for excitation frequencies and pressure levels representative of common system conditions.
• Recommended instrumentation, signal processing and minimal data treatment to produce comparable pressure-ripple spectra.
• Typical accuracy/uncertainty expectations for the simplified method and guidance on interpretation of measured levels.
• Reporting format to allow direct comparison between pumps and to inform system acoustic assessments.
• Informative annex explaining the physical origin of pressure ripple and rationale for the simplified procedure.

Typical use and users

Used by hydraulic pump manufacturers for product characterization, by system designers and acoustic engineers assessing fluid-borne noise sources, and by independent test laboratories performing performance and noise-related tests on hydraulic components. It is also useful for R&D teams developing quieter hydraulic drives and for standards bodies aligning measurement practice.

Related standards

ISO 10767 is a multi-part series. Relevant related documents include ISO 10767-1 (method for determining source flow ripple and source impedance of pumps; later edition published in 2015) and other parts addressing motors and additional methods in the series. A newer revision exists for Part 3 in the series (published subsequently).

Keywords

hydraulic fluid power; pressure ripple; flow ripple; pump testing; acoustic emissions; vibration; test method; ISO 10767; pump measurement; source impedance.

FAQ

Q: What is this standard?

A: ISO 10767-2:1999 is Part 2 of the ISO 10767 series and specifies a simplified test method for measuring fluid-borne pressure ripple produced by hydraulic pumps.

Q: What does it cover?

A: It covers practical test setup, measurement and reporting procedures for pump pressure ripple across frequencies and pressures relevant to airborne-noise generation in hydraulic systems, with guidance on minimal data processing and expected measurement behaviour.

Q: Who typically uses it?

A: Pump manufacturers, hydraulic system designers, acoustic/vibration engineers, and accredited test laboratories use this standard to characterise and compare pressure ripple from pumps and to inform noise-reduction design work.

Q: Is it current or superseded?

A: The 1999 edition of ISO 10767-2 has been subject to ISO periodic review and was confirmed following review; the ISO bibliographic record indicates the edition was last reviewed and confirmed in 2021 and therefore remained current at that confirmation. Users should check the national/ISO catalog before purchase to confirm whether a later revision has been published since that confirmation date.

Q: Is it part of a series?

A: Yes — ISO 10767 is a multi-part series dealing with pressure/flow ripple measurement in hydraulic fluid power. Other parts include Part 1 (precision method for pumps, later editions) and Part 3 (methods for motors), among related documents in the same ICS area.

Q: What are the key keywords?

A: Pressure ripple, flow ripple, pump testing, hydraulic noise, source impedance, measurement method, hydraulic fluid power, ISO 10767.