ISO 20816-5-2018 pdf free download.Mechanical vibration – Measurement and evaluation of machine vibration – Part 5: Machine sets in hydraulic power generating and pump-storage plants.
This document provides guidelines for evaluating the vibration measurements made at the bearings. bearing pedestals or bearing housings and also for evaluating relative shaft vibration measurements made on machine sets in hydraulic power generating and pump-storage plants when the machine is operating within its normal operating range. The normal operating ranges for each type of turbine covered by this document are defined in Annex A.
This document is applicable to machine sets in hydraulic power generating plants and in pump-storage plants with typical rotational speeds of 60 r/min to 1 000 r/min fitted with shell or pad (shoe) type oil- lubricated bearings.
NOTE The current database Includes machine speeds ranging from 60 r/min to 750 r/min (with a very small sample of 1 000 r/min machines).
This document defines different limit values of bearing housing and shaft vibration depending on the type of turbine, the orientation of the shaft (i.e. horizontal or vertical) and for each of the bearing locations.
This document Is based on statistical analysis and provides criteria for the most common types of turbines, pump-turbines and pumps. For specific information on which types of units are covered In this document, see AnuexA.
Machine sets covered by this document can have the following configurations:
a) generators driven by hydraulic turbines:
b) motor-generators driven by pump-turbines;
c) motor-generators driven by hydraulic turbines and separate pumps;
d) pumps driven by electric motors.
This document is not applicable to the following unit configurations. parameters and operating conditions:
hydraulic machines with water-lubricated bearings;
— hydraulic machines or machine sets having rolling element bearings (for these machines. see IEC 62006 and/or ISO 10816-3);
— pumps in thermal power plants or industrial installations (for these machines. see Iso 10816-7);
— electrical machines operating as motors except for the use of these machines in pump-storage applications;
— hydro generators operating as synchronous condensers (with the water in the turbine depressed by compressed air);
2 Normative references
The following documents are referred to in the text in such a way that sonic or all of their content constitutes requirements 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.
ISO 20816-1, Mechanical vibration — Measurement and evaluation of machine vibration — Part 1: General guidelines
I EC 60994. Guide for field measurement of vibrations and pulsations in hydraulic machines (turbines, storage pumps and pump-turbines)
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 httpsfwwwiso.orgJøbp/
— IF.C Electropedia: available at http://www.elettropedia.org/
4 MachIne arrangements
The large variety of arrangements of hydraulic machine sets means that separation into four principal groups Is useful when considering bearing arrangements and the locations where vibration measurements should be taken. These four principal groups are as follows:
Group 1: Horizontal machine sets with the generator equipped with end-shield or pedestal bearings mounted on a rigid foundation.
— Group 2: Horizontal machine sets with bearing housings which are braced against the casing of the hydraulic machine.
— Group 3: Vertical machine sets where all the bearing housings are supported by the station foundations.ISO 20816-5 pdf free download.
Tags: Mechanical vibration
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