Reciprocating internal combustion engine driven alternating current generating sets-Part 9: Measurement and Evaluation of Mechanical Vibrations
1 Scope
This document describes a procedure for measuring and evaluating the external mechanical vibration behaviour of generating sets at the measuring points stated in this document.
It applies to RIC engine driven a.c. generating sets for fixed and mobile installations with rigid and/or resilient mountings. It is applicable for land and marine use, excluding generating sets used on aircraft or those used to propel land vehicles and locomotives.
For some specific applications (essential hospital supplies, high rise buildings, etc.) supplementary requirements may be necessary. The provisions of this document are intended to be regarded as a basis for such applications.
For generating sets driven by other reciprocating-type prime movers (e.g. sewage gas engines, steam engines), the provisions of this document are intended to be regarded as a basis for such applications.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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
Note: GB/T 2298-2010 Mechanical vibration, shock and condition monitoring - Vocabulary (ISO 2041:2009, IDT).
ISO 8528-5:2022 Reciprocating internal combustion engine driven alternating current generating sets - Part 5: Generating sets
Note 1: There is no technical difference between the content cited in ISO 8528-5:2022 and the content cited in ISO 8528-5:2013.
Note 2: GB/T 2820.5-2009, Reciprocating internal combustion engine driven alternating current generating sets - Part 5: Generating (ISO 8528-5:2005, IDT).
3 Terms and definitions
For the purposes of this document, the following terms and definitions given in ISO 2041 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
——ISO:http://www.iso.org/obp/
——IEC:http://www.electropedia.org/
3.1
vibration severity
generic term that designates a value or set of values, such as a maximum value, average value or rms value, or other parameter that is descriptive of the vibration
Note: It may refer to instantaneous values or average values.
4 Symbols and abbreviated terms
For the purposes of this document, the following symbols apply.
f: Frequency.
nr: Declared engine speed.
s: Displacement.
t: Time.
v: Velocity.
w: Angular velocity.
x: Axial co-ordinate.
y: Transverse co-ordinate.
z: Vertical co-ordinate.
The following subscripts are used in conjunction with the vibration quantities v and s.
rms: Value of vibration quantity.
x: Measured value of vibration quantity in the axial direction.
y: Measured value of vibration quantity in the transverse direction.
z: Measured value of vibration quantity in the vertical direction.
1,2,…,n: Progressive values.
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Regulations and additional requirements
6 Measuring devices
7 Location of measuring points and direction of measurements
8 Operating conditions during measurement
9 Evaluation of results
10 Test report
Annex A (Informative) Typical generating set configurations
Annex B (Informative) Remarks on the assessment of vibrations of the generating set
Annex C (Informative) Vibration values
Annex D (Informative) Measuring report
Bibliography
