ISO 22423:2019
Foil bearings — Performance testing of foil thrust bearings — Testing of static load capacity, bearing torque, friction coefficient and lifetime
This document specifies the method for comparing performance evaluation results for a foil thrust bearing that supports load with aerodynamic force generated by the rotation of a driving shaft and lubricates using air, not lubricating oil. The test procedure explained in this document measures and evaluates the static load capacity, bearing torque, friction coefficient and lifetime of the foil thrust bearing and compares the test results to those for different test conditions. The measured static load capacity can be varied depending on the capabilities of the test device used.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
4.1 Basic characters — Roman alphabet
4.2 Basic characters — Greek alphabet
4.3 Additional signs — Subscripts
5 Purpose of test
6 Test conditions
6.1 General
6.2 Design of test apparatus
6.3 Installation of sensors
6.4 Test specimens
7 Test methods
7.1 Principle
7.2 Start–stop test cycle and evaluation of the take-off speed
7.3 Calculation of bearing torque and load
7.4 Determination of static load capacity
7.5 Evaluation of static load capacity per unit area
8 Friction coefficient
9 Durability test and lifetime
9.1 Test procedure
9.2 Determination of lifetime
10 Test report
Annex A (informative) Configuration of a typical foil thrust bearing
Annex B (informative) Test report
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
4.1 Basic characters — Roman alphabet
4.2 Basic characters — Greek alphabet
4.3 Additional signs — Subscripts
5 Purpose of test
6 Test conditions
6.1 General
6.2 Design of test apparatus
6.3 Installation of sensors
6.4 Test specimens
7 Test methods
7.1 Principle
7.2 Start–stop test cycle and evaluation of the take-off speed
7.3 Calculation of bearing torque and load
7.4 Determination of static load capacity
7.5 Evaluation of static load capacity per unit area
8 Friction coefficient
9 Durability test and lifetime
9.1 Test procedure
9.2 Determination of lifetime
10 Test report
Annex A (informative) Configuration of a typical foil thrust bearing
Annex B (informative) Test report
Bibliography