ISO 12152:2012 潤滑剤、工業用オイルおよび関連製品—平歯車テストリグを使用した工業用ギアオイルの発泡および空気放出特性の決定—フレンダーフォームテスト手順 | ページ 2

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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 2.

The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 12152 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants.

Introduction

Excessive formation of foam by a lubricant in service may affect the gearbox service negatively. The reason for foaming might be poor antifoaming and air release properties of the lubricant and/or contamination of the lubricant in service. In order to study the foaming properties of lubricants during the formulation work, numerous laboratory glassware tests, e.g. the test procedure used for gear oils that is described in ISO 6247, have been developed. As the foam formation during this test is different to the foam formation in a real gear drive, the demand for a standardized foam test, using test conditions close to those seen in a gear drive, has been increasing. The requirements for lubricants for gearboxes in wind turbines have finally led to this International Standard.

It has been assumed by the compilers of this test method that anyone using the method will be either fully trained and familiar with all normal engineering and laboratory practice, or under the direct supervision of such a person.

It is the responsibility of the operator to ensure that all local legislative requirements are met.

1 Scope

This International Standard describes a test method based on a single-stage spur gear rig to determine the foaming properties of oils used for the lubrication of gears.

This method is used for evaluating the foaming and air release properties of lubricating oils, in conditions close to real gearbox conditions.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

Bibliography