ISO 13373-5-2020 pdf free.Condition monitoring and diagnostics of machines一Vibration condition monitoring 一 Part 5: Diagnostic techniques for fans and blowers.
This document sets out the specific procedures to be considered when carrying out vibration diagnostics of various types of fans and blowers.
This document is intended to be used by condition monitoring practitioners, engineers and technicians and provides a practical, step-by-step, vibration-based approach to fault diagnosis. In addition, it gives a number of examples for a range of machine and component types and their associated fault symptoms.
The approach given in this document is based on established good practice, put together by experienced users, although it is acknowledged that other approaches can exist. Recommended actions for a particular diagnosis depend on individual circumstances, the degree of confidence in the fault diagnosis (e.g. has the same diagnosis been made correctly before for this machine), the experience of the practitioner, the fault type and severity as well as on safety and commercial considerations. It is neither possible nor the aim of this document to recommend actions for all circumstances.
2 Normative references
The following documents are referred to in the text in such a way that some 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 2041, Mechanical vibration, shock and condition monitoring — Vocabulary ISO 13372, Condition monitoring and diagnostics of machines — Vocabulary
ISO 13373-1, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 1: General procedures
ISO 13373-2, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 2: Processing, analysis and presentation of vibration data
ISO 13373-3:2015, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 3: Guidelines for vibration diagnosis
ISO 2 1940-2, Mechanical vibration — Rotor balancing — Part 2: Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041, ISO 13372 and
ISO 21940-2 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4.1 Vibration measurements
Vibration measurements may be obtained using two main categories of transducers:
— non-contacting, e.g. inductive, capacitive and eddy current probes used on rotating shafts; and
— seismic transducers, e.g. accelerometers or velocity transducers used on non-rotating parts, such as bearing housings.
International Standards are available to help assess the vibration severity for the described types of measurement, in particular the ISO 7919, ISO 10816 and ISO 20816 series.
Descriptions of transducer and measurement systems as well as specification of techniques are given in ISO 13373-1 and ISO 13373-2, which shall be considered for appropriate selection.
4.2 Machine operational parameter measurements
Machine operational parameter measurements are operational parameters, e.g. rotational speed, load, fan orientation (vertical or horizontal), mounting configuration (solid or flexible support arrangement) and temperatures, that can have an influence on the machine vibration characteristics and are therefore important to acquire in order to arrive at an appropriate diagnosis. For a given machine, these parameters can be associated with a range of steady-state and transient operating conditions.
5 Initial analysis
An initial analysis shall be performed in accordance with ISO 13373-3:2015, Annex A. This analysis should identify safety concerns, the presence of high vibration and, if so, its vibration severity, past history, effects of operating parameters, consequences of not taking corrective actions and the need for a fan shutdown. Other factors such as mounting configuration, position relative to other rotating machines, building structure, environment, etc. should be considered during an initial analysis. See also ISO 13373-3:2015, Annexes B to D, for common faults such as from installation and bearing defects.
6 Specific analysis of fans and blowers
This document covers vibration diagnosis information for the most common types of fans and blowers. Symptoms of the most prevalent fan and blower defects that cause excessive vibration magnitudes are given in Annex A. which shall be used. This annex does not cover fan or blower vibration from hydrodynamic bearing or rolling element bearing problems, which are addressed in ISO 13373-3:2015, Annexes C and 0, respectively.
The systematic procedure used in the 150 13373 series includes usage of fault tables and a step-by-step methodology of vibration diagnosis of faults. For this document, the fault table for the diagnosis of fans and blowers to be used is given by TableA.1. while the methodology of vibration diagnosis is presented in Annex B. Examples of the use of the fault table and methodology of vibration diagnosis of fans and blowers are given in Annex C.ISO 13373-5 pdf free download.