CAVITATION PITTING EVALUATION IN HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES - PART 2: EVALUATION IN PELTON TURBINES
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 General
1.1 Scope and object
1.2 Excluded topics
1.3 Normative reference
2 Terms, symbols and definitions
2.1 Units
2.2 List of terms
2.3 Location and type of damage to Pelton buckets
3 Nature and extent of cavitation pitting guarantees
3.1 Period of guarantee
3.2 Definition of the amount of cavitation pitting
3.3 Operating ranges and duration of operation
3.3.1 Reference duration of operation
3.3.2 Actual duration of operation
3.3.3 Special conditions
4 Test procedure
4.1 Cavitation pitting repair during the guarantee
period
4.2 Measurement and calculation of the amount of
cavitation pitting
5 Computation of results
5.1 Fulfilment of the guarantee
Annexes
A Examples of amounts of cavitation pittings
B Bibliography
Provides a basis for formulating guarantees on cavitation pitting on Pelton turbine runners, in addition to the measuring and evaluating of the amount of cavitation pitting on Pelton turbine runners of a specific turbine, specified in the contract by power, specific hydraulic energy of machine (head), rotational speed, material, operation, and so on.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 4 |
