ISO/TR 21784:2018 すべり軸受 — 傾斜パッド軸受用のスプレーノズルタイプの直接潤滑 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 7, Special types of plain bearings.

Introduction

These days, rotating machines such as turbines, generators, compressors, pumps, etc. tend to be increasing in speed and reducing in size. Bearings used in such machines can cause large power losses, which not only degrades machine performance but also results in the associated cooling system being larger in size. Directed lubrication type bearings can reduce the power loss significantly. They are energy-saving bearings that can simplify facilities and improve plant efficiency.

1 Scope

Directed lubrication is an advanced technology that is capable of reducing the power loss and improving the performance of tilting pad type bearings. Unlike flooded lubrication, where the bearing components remain permanently submerged in an oil filled housing, with directed lubrication the components are not submerged and the oil is delivered from an external source directly to the working surfaces of the tilting pads after which it falls freely away to be drained from the bottom of the housing. There are several alternative methods of realising the benefits of directed lubrication in tilting pad bearing designs. As an example, this document specifies a spray nozzle type directed lubrication system where lubricant is supplied to each pad through nozzles mounted between the pads in tilting pad thrust and journal bearings. The design concept of this type of lubrication is described.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

No terms and definitions are listed in this document.

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Bibliography