ISO 4392-1:2002 PDF

Name: ISO 4392-1:2002 — Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and constant pressure
SKU: ISO 4392-1:2002
Price: 25 EUR
Availability: InStock

Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and constant pressure

Название (английский):

ISO 4392-1:2002

Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and constant pressure

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 7 марта 2002 г.
Издание:: ISO IS 4392 edition 3 version 1
ICS:: 23.100.10

Тип поставки:

Full version165 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:2 раб. дн. (перевод)

Цена:165 €

Описание (английский):

This part of ISO 4392 describes a method of determining the low speed characteristics of positive displacement rotary fluid power motors, of either fixed or variable displacement types. The method involves testing at slow speeds which may generate frequencies having a significant influence upon the steady continuous torque output of the motor and affect the system to which the motor would be connected.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview - ISO 4392-1:2002 (Hydraulic fluid power, low speed testing)

ISO 4392-1:2002 specifies a laboratory method for determining the low‑speed characteristics of positive displacement rotary hydraulic motors (fixed or variable displacement). The standard describes a test circuit, required instrumentation and data acquisition, pretest calculations, controlled test conditions, and the procedures and calculations used to derive key performance metrics such as flow, volumetric efficiency and torque characteristics at constant low speed and constant pressure.

Keywords: ISO 4392-1, hydraulic motor testing, hydraulic fluid power, low speed characteristics, positive displacement rotary motors.

Key topics and technical requirements

Scope and motor types: Applies to fixed and variable displacement positive‑displacement rotary motors tested at slow speeds where frequency effects influence steady torque output.

Test installation and circuit: Defines a typical hydraulic test circuit (supply, relief valves, fluid conditioning, cooler/heater, constant‑speed load) and safety considerations.

Instrumentation: Requires measurement of total flow, inlet/outlet pressure and temperature, inlet flow option, output torque, shaft speed and angular displacement. Instruments must meet ISO 9110‑1/2 requirements and resolve signals at frequencies >10× the highest expected fundamental frequency.

Pretest calculations: Guidance for calculating rated geometric torque, displacement pulses per revolution, fundamental data frequency, and ideal flow at rated speed.

Controlled test conditions: Typical conditions include inlet fluid temperatures (50 °C or 80 °C), inlet pressures at 100% and 50% of rated pressure, constant back‑pressure per manufacturer limits, minimum recommended slow speed (or 1 min‑1 if unspecified), and defined displacement settings for variable motors.

Test procedure and tolerances: Maintain inlet/outlet pressure to ±2% or 1 bar (whichever greater), shaft speed ±2%, inlet temperature ±2 °C during recordings; establish thermal equilibrium; record enough revolutions to capture one complete motor cycle.

Data analysis and results: Prescribes computation of derived swept volume flow, mean flow, flow irregularity, flow irregularity index, volumetric efficiency, peak‑to‑peak flow, mean torque, torque irregularity and torque irregularity index.

Measurement accuracy: Defines three accuracy classes (A, B, C) in normative Annex A.

Applications and users

Test laboratories and OEM quality/control teams performing hydraulic motor testing

R&D and validation engineers evaluating low‑speed performance, torque irregularity and volumetric efficiency

System designers and integrators assessing motor behavior under frequencies that affect connected systems

Procurement and certification bodies requiring standardized performance data for positive displacement motors

Practical benefits: consistent comparative data, repeatable test methodology, and clear reporting formats for motor selection, troubleshooting and system integration.

Related standards

ISO 4392-2 (Startability) and ISO 4392-3 (Constant flow and constant torque) - other parts of ISO 4392 series

Normative references cited: ISO 3448, ISO 4391, ISO 5598, ISO 9110‑1, ISO 9110‑2

For engineers and test labs focused on hydraulic motor performance, ISO 4392-1 is a core reference for reliable, repeatable low‑speed hydraulic motor testing.

ISO 4392-1:2002 PDF

Abstract

Похожие стандарты

Overview - ISO 4392-1:2002 (Hydraulic fluid power, low speed testing)

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 4392-1:1989

Hydraulic fluid power — Determination of characteristics of motors — Part 1: At constant low speed and at con…

SIST ISO 9110-1:2021

Hydraulic fluid power -- Measurement techniques

BS ISO 4392-2:2002

Hydraulic fluid power. Determination of characteristics of motors. Startability.

SIST ISO 4392-3:1998

Hydraulic fluid power -- Determination of characteristics of motors -- Part 3: At constant flow and at consta…

ISO 3448:1975

Industrial liquid lubricants — ISO viscosity classification

SIST ISO 4391:1995

Hydraulic fluid power -- Pumps, motors and integral transmissions -- Parameter definitions and letter symbols

ISO 5598:1985

Fluid power systems and components — Vocabulary