ISO 7146-2:2019

Plain bearings — Appearance and characterization of damage to metallic hydrodynamic bearings — Part 2: Cavitation erosion and its countermeasures

This document defines, describes and classifies the characteristics of damage occurring in service in hydrodynamically lubricated metallic plain bearings due to cavitation erosion, together with possible countermeasures. It assists in understanding the various characteristic forms of damage which can occur. Consideration is restricted to damage which has a well-defined appearance and which can be attributed to particular causes with a high degree of certainty. Various appearances are illustrated with photographs and diagrams.

Paliers lisses — Aspect et caractérisation de l'endommagement des paliers métalliques à couche lubrifiante fluide — Partie 2: Érosion de cavitation et sa contre-mesure

Drsni ležaji - Tekočinski sloj kovinskih ležajev - Izrazi in značilnosti poškodb - 2. del: Kavitacijske poškodbe in ukrepi za njihovo preprečevanje

Ta dokument opredeljuje, opisuje in razvršča značilnosti poškodb, ki se pojavijo med obratovanjem v hidrodinamično mazanih kovinskih drsnih ležajih zaradi kavitacijske erozije, skupaj z možnimi protiukrepi. Pomaga razumeti različne značilne oblike poškodb, ki se lahko pojavijo.
Obravnava je omejena na poškodbe, ki so jasno vidne in jih je mogoče z veliko stopnjo gotovosti pripisati določenim vzrokom. Različni prikazi poškodb so ponazorjeni s fotografijami in diagrami.

General Information

• Status: Published
• Publication Date: 15-May-2019
• ICS: 21.100.10 - Plain bearings
• Technical Committee: ISO/TC 123/SC 2 - Materials and lubricants, their properties, characteristics, test methods and testing conditions
• Drafting Committee: ISO/TC 123/SC 2 - Materials and lubricants, their properties, characteristics, test methods and testing conditions
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Apr-2024
• Completion Date: 15-Apr-2024
• Ref Project: SIST ISO 7146-2:2023 - Plain bearings - Appearance and characterization of damage to metallic hydrodynamic bearings - Part 2: Cavitation erosion and its countermeasures

Relations

• Revises: ISO 7146-2:2008 - Plain bearings — Appearance and characterization of damage to metallic hydrodynamic bearings — Part 2: Cavitation erosion and its countermeasures
• Effective Date: 23-Apr-2020

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ISO 7146-2:2023
01-april-2023
Drsni ležaji - Tekočinski sloj kovinskih ležajev - Izrazi in značilnosti poškodb - 2.
del: Kavitacijske poškodbe in ukrepi za njihovo preprečevanje
Plain bearings - Appearance and characterization of damage to metallic hydrodynamic
bearings - Part 2: Cavitation erosion and its countermeasures
Paliers lisses - Aspect et caractérisation de l'endommagement des paliers métalliques à
couche lubrifiante fluide - Partie 2: Érosion de cavitation et sa contre-mesure
Ta slovenski standard je istoveten z: ISO 7146-2:2019
ICS:
21.100.10 Drsni ležaji Plain bearings
SIST ISO 7146-2:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 7146-2:2023

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SIST ISO 7146-2:2023
INTERNATIONAL ISO
STANDARD 7146-2
Second edition
2019-05
Plain bearings — Appearance and
characterization of damage to metallic
hydrodynamic bearings —
Part 2:
Cavitation erosion and its
countermeasures
Paliers lisses — Aspect et caractérisation de l'endommagement des
paliers métalliques à couche lubrifiante fluide —
Partie 2: Érosion de cavitation et sa contre-mesure
Reference number
ISO 7146-2:2019(E)
©
ISO 2019

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SIST ISO 7146-2:2023
ISO 7146-2:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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SIST ISO 7146-2:2023
ISO 7146-2:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Cavitation erosion . 1
4.1 Mechanism of cavitation erosion . 1
4.2 Classification of cavitation erosion . 4
4.3 General countermeasures against cavitation erosion . 6
5 Five types of cavitation erosion. 7
5.1 General . 7
5.2 Flow cavitation erosion . 7
5.2.1 Typical damage appearance . 7
5.2.2 Possible causes .
...

INTERNATIONAL ISO
STANDARD 7146-2
Second edition
2019-05
Plain bearings — Appearance and
characterization of damage to metallic
hydrodynamic bearings —
Part 2:
Cavitation erosion and its
countermeasures
Paliers lisses — Aspect et caractérisation de l'endommagement des
paliers métalliques à couche lubrifiante fluide —
Partie 2: Érosion de cavitation et sa contre-mesure
Reference number
ISO 7146-2:2019(E)
©
ISO 2019

---------------------- Page: 1 ----------------------
ISO 7146-2:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 7146-2:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Cavitation erosion . 1
4.1 Mechanism of cavitation erosion . 1
4.2 Classification of cavitation erosion . 4
4.3 General countermeasures against cavitation erosion . 6
5 Five types of cavitation erosion. 7
5.1 General . 7
5.2 Flow cavitation erosion . 7
5.2.1 Typical damage appearance . 7
5.2.2 Possible causes . 8
5.2.3 Possible countermeasures . 8
5.2.4 Typical examples (see Figures 4 to 8) . 8
5.3 Impact cavitation erosion .10
5.3.1 Typical damage appearance .10
5.3.2 Possible damage causes .10
5.3.3 Possible countermea
...