is/iso 8528-9 (1995): reciprocating internal combustion ... · of mechanical vibration’ issued by...
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IS/ISO 8528-9 (1995): Reciprocating Internal CombustionEngine Driven Alternating Current Generating Sets, Part 9:Measurement and Evaluation of Mechanical Vibrations [TED 2:Automotive Primemovers]
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Indian StandardRECIPROCATING INTERNAL COMBUSTIONENGINE DRIVEN ALTERNATING CURRENT
GENERATING SETSPART 9 MEASUREMENT AND EVALUATION OF MECHANICAL VIBRATIONS
ICS 29.160.40
© BIS 2012
November 2012 Price Group 7
B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
IS/ISO 8528-9 : 1995
Automotive Primemovers Transmission and Steering Systems and Internal Combustion EnginesSectional Committee, TED 2
NATIONAL FOREWORD
This Indian Standard (Part 9) which is identical with ISO 8528-9 : 1995 ‘Reciprocating internalcombustion engine driven alternating current generating sets — Part 9: Measurement and evaluationof mechanical vibration’ issued by the International Organization for Standardization (ISO) was adoptedby the Bureau of Indian Standards on the recommendation of the Automotive Primemovers Transmissionand Steering Systems and Internal Combustion Engines Sectional Committee and approval of theTransport Engineering Division Council.
The text of ISO Standard has been approved as suitable for publication as an Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attentionis particularly drawn to the following:
a) Wherever the words ‘International Standard’ appear referring to this standard, they should beread as ‘Indian Standard’.
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker.
In this adopted standard, reference appears to certain International Standards for which IndianStandards also exist. The corresponding Indian Standards which are to be substituted in their respectiveplaces are listed below along with their degree of equivalence for the editions indicated:
International Standard Corresponding Indian Standard Degree of Equivalence
1S0 2041 : 1990 Vibration and shock— VocabularyISO 5348 : 1998 Mechanical vibrationand shock — Mechanical mountingof accelerometersISO 8528-5 : 1993 Reciprocatinginternal combustion engine drivenalternating current generating sets —Part 5: Generating setsIEC 34-7 : 1992 Rotating electricalmachines — Part 7 : Classificationof types of construct ions andmounting arrangements (IM Code)
IS 11717 : 2000 vibration and shock— VocabularyIS 14883 : 2000 Mechanical vibrationand shock — Mechanical mountingof accelerometersIS/ISO 8528-5 : 2005 Reciprocatinginternal combustion engine drivenalternating current generating sets:Part 5 Generating setsIS 2253 :1974 Designation for typesof construct ion and mountingarrangement of rotating electricalmachines (first revision)
Identical
do
Identical withISO 8528-5 : 2005
Technically Equivalent
For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value, observed or calculated, expressing the result of a test or analysis, shall be rounded off inaccordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number ofsignificant places retained in the rounded off value should be the same as that of the specified valuein this standard.
Indian StandardRECIPROCATING INTERNAL COMBUSTIONENGINE DRIVEN ALTERNATING CURRENT
GENERATING SETSPART 9 MEASUREMENT AND EVALUATION OF MECHANICAL VIBRATIONS
IS/ISO 8528-9 : 1995
1
2
IS/ISO 8528-9 : 1995
IS/ISO 8528-9 : 1995
3
4
IS/ISO 8528-9 : 1995
Annex A (informative)
ISO 8528-9: 1995(E)
Typical generating set configurations
There are a number of possibilities for the assembly of a reciprocating internal combustion engine and a generator. Figures A.1 to A.6 show examples of typical configurations.
I I I I I I I I Id \
- I v I _~_-- ----- -~_ I m I
IJ
Figure A.l - Engine and generator rigidly mounted
I I I I I I I I 1, T
m -_~-- _~_-_ L
Figure A.2 - Engine resiliently mounted, generator rigidly mounted, flexible coupling
r
I I I I I I I I 1,
m I - -_~- ~--_ ~_ -~---- I w 1 \
Figure A.3 - Engine and generator rigidly mounted on resiliently mounted base frame
IS/ISO 8528-9 : 1995
5
ISO 8528-9: 1995(E)
Figure A.4 - Engine resiliently mounted, generator rigidly mounted on resiliently mounted base frame, flexible coupling
Figure A.5 - Assembly with flange housing and resilient mounting on the engine and generator
Figure A.6 - Assembly with flange housing and resilient mounting of the engine
6
IS/ISO 8528-9 : 1995
ISO 8528-9: 1995(E)
Annex B (informative)
Remarks on the assessment of vibrations of the generating set
It has been found that generators operating in gener- ating sets suffer higher values of Vibration severity compared with those running independently.
Typical features of RIC engines are the oscillating masses, torque fluctuation and pulsating forces in the associated Pipe-work. All these features exert con- siderable alternating forces on the main supports and give rise to high Vibration amplitudes on the main frame. The Vibration amplitudes are generally higher than those for rotating machinery, but since they are largely influenced by the design features of the gen- erating Sets, they tend to remain more constant over the life of the RIC engine than they do for rotating machinery.
The Vibration values determined by using this part of ISO 8528 allow us to make a general Statement on the vibrational behaviour of the generating set and a general assessment of the running behaviour and the Vibration interactions of the total set. However, the determined Vibration values do not allow us to make a Statement on the mechanical Stresses of fixed or moving Parts of the generating Sets.
Neither do the determined values of Vibration severity allow us to make a Statement of the torsional and linear vibrational behaviour of the shaft System.
Even if accurate assessment of mechanical Stresses in the generating set by using Vibration measurement is not possible, experience has shown that the vi- bration level above which important Parts of the gen- erating set are mechanically damaged by undue Vibration stress is usually significantly higher than the level which is accepted as “usual” from experience with similar generating Sets.
However, if the above “usual” ranges are exceeded, darnage to additional attachments and connecting Parts of the generating set, as well as to governing and monitoring devices, etc., may occur.
The sensitivity of these components depends on their design and how they are mounted. Thus, in some in- dividual cases, it may be difficult to avoid Problems even when the assessment value lies in the “usual” range. Such Problems have to be rectified by specific “local measures” on the generating set (e.g. by elim- ination of mounted component resonances).
IS/ISO 8528-9 : 1995
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8
IS/ISO 8528-9 : 1995
[ Blank Page ]
IS/ISO 8528-9 : 1995
9
0
Decl
ared
en
gine
Ra
ted
powe
r ou
tput
of
the
ge
nera
ting
set
Vibr
atio
n di
spla
cem
entl)
, s,
,, Vi
brat
ion
velo
city
, v,
,~
Vibr
atio
n ac
cele
ratio
nl),
arm
s Sp
eed
(cos
cp =
0,8
) RI
C G
ener
ator
2)
RI
C RI
C en
gine
*)
3,
engi
ne
2)s)
G
ener
ator
2)
en
gine
*)
3)
Gen
erat
or
2)
valu
e 1
valu
e 2
valu
e 1
valu
e 2
valu
e 1
valu
e 2
min
-l kV
A kW
m
m
mm
m
m
mm
/s
mm
/s
mm
/s
m/s
* m
/s*
m/s
*
GI5
G
I2
(1 -c
ylin
der
(1 -c
ylin
der
1,ll
1,27
70
80
44
50
>
2 00
0 bu
t en
gine
) en
gine
) <
3 60
0 <
50
< 40
W
3 0,
95
50
60
31
38
> 50
>4
0 0,
64 4
) 0,
8 4’
40
4)
50 4
) 25
4)
31 4
)
< 10
~8
>
10 b
ut
> 8
but
< 40
-
< 50
0,
64
40
25
> 1
300
but
> 50
but
>
40 b
ut
< 2
000
< 12
5 <
100
0,4
0,48
25
30
16
19
> 12
5 bu
t >
100
but
< 25
0 <
200
0,72
0,
4 0,
48
45
25
30
28
16
19
> 25
0 >
200
0,72
0,
32
0,45
45
20
28
28
13
18
> 25
0 bu
t >
200
but
> 72
0 bu
t <
1 00
0 0,
32
0,39
20
24
13
15
<
1 25
0 28
<
1300
0,
72
45
> 1
250
> 1
000
0,29
0,
35
18
22
11
14
13
< 72
0 >
1250
>
1 00
0 0,
72
0,24
0,
32
15
20
92
(0,1
6) 5
' (0
,24)
5'
45
(IO)
5)
(15)
5)
28
65)
5'
(9,5
) 5'
NOTE
-
The
rela
tions
hip
betw
een
Vibr
atio
n ve
loci
ty
and
Vibr
atio
n fre
quen
cy
is s
hown
in
fig
ure
Cl.
1)
The
valu
es
of s
,,~ a
nd a
rms a
re d
eter
min
ed
from
th
e fo
llowi
ng
equa
tions
by
usi
ng t
he v
alue
s gi
ven
in th
e ta
ble
for
v,,,,
~.
S rms =
0,0
159
x vr
ms
a rm
s = 0
,628
x v,
ms
2)
In th
e ca
se o
f fla
nge
hous
ing
coup
led
gene
ratin
g se
ts t
he v
alue
s m
easu
red
at P
oint
5 [
see
figur
e 1
a)]
shal
l m
eet
the
valu
es
for
gene
rato
rs.
3)
The
stat
ed
valu
es
for
RIC
engi
nes
are
appl
icab
le
for
engi
nes
with
po
wer
Out
puts
of
mor
e th
an
100
kW.
For
smal
ler
engi
nes
with
po
wer
Out
puts
be
low
100
kW,
no t
ypic
al
valu
es
exis
t.
4)
Thes
e va
lues
ar
e su
bjec
t to
agr
eem
ent
betw
een
the
man
ufac
ture
r an
d cu
stom
er.
5)
The
valu
es
give
n in
par
enth
eses
ar
e ap
plie
d to
gen
erat
ors
mou
nted
on
sol
id c
oncr
ete
foun
datio
ns.
In t
hese
ca
ses
the
axia
l m
easu
rem
ent
for
Poin
ts
7 an
d 8
in fi
gure
1
a)
and
b) s
hall
be 5
0 %
of
the
valu
es
give
n in
par
enth
eses
.
m 0 0
10
IS/ISO 8528-9 : 1995
IS/ISO 8528-9 : 1995
11
12
IS/ISO 8528-9 : 1995
IS/ISO 8528-9 : 1995
13
14
IS/ISO 8528-9 : 1995
IS/ISO 8528-9 : 1995
15
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This Indian Standard has been developed from Doc No.: TED 2 (781).
Amendments Issued Since Publication______________________________________________________________________________________
Amendment No. Date of Issue Text Affected______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
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