Plain bearings — Fluid film bearing materials for vehicular turbocharger

This document specifies the material compositions and required properties of fluid film bearings used for vehicular turbochargers.

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General Information

Status
Withdrawn
Publication Date
28-Aug-2018
Current Stage
6060 - International Standard published
Start Date
21-Aug-2018
Completion Date
29-Aug-2018
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ISO 22507:2018 - Plain bearings -- Fluid film bearing materials for vehicular turbocharger
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INTERNATIONAL ISO
STANDARD 22507
First edition
2018-09
Plain bearings — Fluid film bearing
materials for vehicular turbocharger
Reference number
ISO 22507:2018(E)
ISO 2018
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ISO 22507:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

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.
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Published in Switzerland
ii © ISO 2018 – All rights reserved
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ISO 22507:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Requirements for bearing material .................................................................................................................................................. 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Seizure resistance ................................................................................................................................................................................. 1

4.3 Wear resistance ...................................................................................................................................................................................... 1

4.4 Chemical corrosion resistance .................................................................................................................................................. 2

5 Bearing material ................................................................................................................................................................................................... 2

Annex A (informative) Vehicular turbocharger and bearings ................................................................................................... 4

© ISO 2018 – All rights reserved iii
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ISO 22507:2018(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www .iso .org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 7,

Special types of plain bearings.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved
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INTERNATIONAL STANDARD ISO 22507:2018(E)
Plain bearings — Fluid film bearing materials for vehicular
turbocharger
1 Scope

This document specifies the material compositions and required properties of fluid film bearings used

for vehicular turbochargers.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Requirements for bearing material
4.1 General
Distinctive conditions of turbochargers are:
— sliding speed is high,
— bearings are exposed to high temperature oil, and
— oil contains contaminants such as soot from the engine.

Therefore, fluid film bearing materials for vehicular turbochargers shall have special properties of

seizure resistance, wear resistance and chemical corrosion resistance as described in the following

subclauses.

Materials of mating runner parts such as shaft and thrust collar shall be hard and smooth enough to

use the maximum capability of the bearing materials.
See Annex A for a general description of a vehicular turbocharger and bearings.
4.2 Seizure resistance

There are cases when the sliding speed of bearings exceeds 100 m/s. For such high speed condition,

seizure resistance against a possible metal contact is required for bearing materials.

4.3 Wear resistance

If a bearing comes to contact with the rotating shaft, or if soot is mixed into the lubricating oil, bearing

wear can occur. In recent years, oil viscosity grade has also been decreasing from an environmental

© ISO 2018 – All rights reserved 1
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ISO 22507:2018(E)

point of view. Excessively worn bearings bring vibration and decrease in machine efficiency. For such

condition, wear resistance to assure normal machine operation is required for bearing materials.

4.4 Chemical corrosion resistance

Bearing inlet oil temperature exceeds 100 °C, and the bearings are exposed to the oil at more than

200 °C just after the stop of the engine d
...

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