GB/T 11348.5-2008 PDF in English
GB/T 11348.5-2008 (GB/T11348.5-2008, GBT 11348.5-2008, GBT11348.5-2008)
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Mechanical vibration evaluation of machine vibration by measurements on rotating shafts -- Part 5: Machine sets in hydraulic power generating and pumping plants
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| GB/T 11348.5-2002 | English | 519 |
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Mechanical vibration of non-reciprocating machines -- Measurements on rotating shafts and evaluation criteria -- Part 5: Machine sets in hydraulic power generating and pumping plants
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Standards related to (historical): GB/T 11348.5-2008
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GB/T 11348.5-2008: PDF in English (GBT 11348.5-2008) GB/T 11348.5-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 17.160
J 04
GB/T 11348.5-2008 / ISO 7919-5:2005
Replacing GB/T 11348.5-2002
Mechanical Vibration – Evaluation of Machine
Vibration by Measurements on Rotating Shafts – Part
5: Machine Sets in Hydraulic Power Generating and
Pumping Plants
(ISO 7919-5:2005, IDT)
ISSUED ON: SEPTEMBER 27, 2008
IMPLEMENTED ON: MAY 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 6
3 Measurement Procedures ... 7
4 Evaluation Criteria ... 8
Annex A (Normative) Evaluation Criteria for Relative Shaft Vibration of
Hydraulic Turbine Sets under Specified Operating Conditions ... 11
Annex B (Informative) Special Features of Shaft Vibration of Hydraulic Machine
Sets ... 17
Annex C (Informative) Analysis Procedure and Applied Regression Technique
... 20
Annex D (Informative) Objectives of this Edition of GB/T 11348.5 ... 22
Bibliography ... 24
Foreword
GB/T 11348 Mechanical Vibration – Measurements of Machine Vibration by
Measurements on Rotating Shafts can be divided into the following 5 parts:
--- Part 1: General Guidelines;
--- Part 2: Large Land-Based Steam Turbine Generators in Excess of 50MW with
Normal Operating Speeds of 1500r/min, 1800r/min, 3000r/min and 3600r/min
--- Part 3: Coupled Industrial Machines;
--- Part 4: Gas Turbine Sets;
--- Part 5: Machine Sets in Hydraulic Power Generating and Pumping Plants.
This Part is Part 5 of GB/T 11348.
This Part of GB/T 11348 equivalently adopts the international standard ISO 7919-
5:2005 Mechanical Vibration – Evaluation of Machine Vibration by Measurements on
Rotating Shafts – Part 5: Machine Sets in Hydraulic Power Generating and Pumping
Plants (English Version).
This Part equivalently adopts ISO 7919-5:2005.
For the ease of use, compared with ISO 7919-5:2005, this Part made the following
editorial modifications:
--- Change “this international standard” into “this Part”;
--- Delete the foreword of the international standard;
--- Use the decimal point symbol “.’ to replace the decimal point symbol “,”;
--- Change the name of the original standard;
--- As for other international standards cited in ISO7919-5:2005, there are those that
are equivalently adopted by China, then the corresponding international
standards are replaced by Chinese standards; but directly cited international
standards that have not been equivalently adopted as Chinese standards.
This Part revised GB/T 11348.5-2002 Mechanical Vibration of Non-Reciprocating
Machines - Measurements on Rotating Shafts and Evaluation Criteria - Part 5: Machine
Sets in Hydraulic Power Generating and Pumping Plants. Compared with GB/T
11348.5-2002, this Part has the major technical changes as follows:
--- Modify the evaluation criteria; use a wider division, divide the entire evaluation
Mechanical Vibration – Evaluation of Machine
Vibration by Measurements on Rotating Shafts – Part
5: Machine Sets in Hydraulic Power Generating and
Pumping Plants
1 Scope
This Part of GB/T 11348 gives guidelines for applying evaluation criteria for shaft
vibration measured at, or close to, the bearings of machines or machine sets in
hydraulic power generating and pumping plants under normal operating conditions.
These guidelines are presented in terms of both steady-state running vibration and any
amplitude changes that can occur in these steady vibration values.
NOTE 1: The numerical values specified are not intended to serve as the only basis for vibration
evaluation since, in general, the vibratory condition of a machine is assessed by consideration
of both the shaft vibration and the associated structural vibration (see GB/T 11348.1 and GB/T
6075.1).
This Part is applicable to machines or machine sets in hydraulic power generating and
pumping plants where the hydraulic machines have speeds from 60 r/min to 1 800
r/min, shell- or shoe-type sleeve bearings, and main engine power of at least 1 MW.
The position of the shaft line can be vertical, horizontal or at an arbitrary angle between
these two directions.
Machine sets covered by this Part include a combination of
a) hydraulic turbines and generators,
b) pumps and electrical machines operating as motors,
c) pump-turbines and motor-generators, and
d) hydraulic turbines, pumps and motor-generators (classic pump-storage machine
sets).
including auxiliary equipment (e.g.: starting turbines or exciters lying in the shaft line).
This Part is also applicable to turbines or pumps connected to generators or electrical
motors via gears and/or radially flexible couplings.
NOTE 2: Electrical machines with speeds between 1 000 r/min and 1 800 r/min are evaluated
according to the criteria specified in GB/T 11348.3.
This Part is not applicable to:
a) pumps in thermal power plants or industrial installations (for these machines, see
GB/T 11348.3),
b) hydraulic machines or machine sets having rolling element bearings, or
c) hydraulic machines with water-lubricated bearings.
As specified in GB/T 11348.1, shaft vibration of machines or machine sets in hydraulic
power generating and pumping plants can be determined with regard to the following
tasks:
a) task A: changes in vibrational behaviour;
b) task B: excessive kinetic load;
c) task C: the monitoring of radial clearance.
2 Normative References
The provisions in following documents become the provisions of this Part through
reference in this Part of GB/T 11348. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Part, however,
parties who reach an agreement based on this Part are encouraged to study if the
latest versions of these documents are applicable. For undated references, the latest
edition of the referenced document applies.
GB/T 11348.1 Mechanical Vibration of Non-Reciprocating Machines -
Measurements on Rotating Shafts and Evaluation Criteria - Part 1: General
Guidelines (GB/T 11348.1-1999, idt ISO 7919-1:1996 Mechanical Vibration –
Evaluation of Machine Vibration by Measurements on Non-Rotating Parts – Part
1: General Guidelines)
GB/T 17189 Code for Field Measurement of Vibrations and Pulsation in Hydraulic
Machines (Turbines Storage Pumps and Pump-Turbines) (GB/T 17189-2007, IEC
60994:1991)
GB/T 21487.1 Rotating Shaft Vibration Measuring Systems - Part 1: Relative and
Absolute Sensing of Radial Vibration (GB/T 21487.1-2008, ISO 10817-1:1998,
IDT)
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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