GB/T 11348.5-2008: 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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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.

Basic Data

Standard ID	GB/T 11348.5-2008 (GB/T11348.5-2008)
Description (Translated English)	Mechanical vibration evaluation of machine vibration by measurements on rotating shafts -- Part 5: Machine sets in hydraulic power generating and pumping plants
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J04
Classification of International Standard	17.160
Word Count Estimation	18,130
Date of Issue	2008-09-27
Date of Implementation	2009-05-01
Older Standard (superseded by this standard)	GB/T 11348.5-2002
Quoted Standard	GB/T 11348.1; GB/T 17189; GB/T 21487.1
Adopted Standard	ISO 7919-5-2005, IDT
Regulation (derived from)	National Standard Approval Announcement 2008 No.16 (Total No.129)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard applies to hydroelectric and pumping plants-assessment or near the bearings in the bearing shaft vibration measurements. According to the steady-state operating conditions of vibration amplitude changes and these values ??may appear to make these guidelines. Note 1: The value is not specified as the sole basis for evaluation of vibration, because the evaluation of the state of the machine vibration is usually considered shaft vibration and bearing vibration two aspects (see GB/T 11348. 1 and GB/T 6075. 1). This section applies to hydroelectric and pumping plants, the rated speed is 60r/min ~ 1800r/min, bush type or drum pad bearing block, main engine power greater than or equal to 1MW.