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GB 10068-2008: [GB/T 10068-2008] Mechanical vibration of certain machines with shaft heights 56 mm and higher-measurement, evaluation and limits of vibration severity
GB 10068-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.01
K 20
GB 10068-2008 / IEC 60034-14:2007
Replacing GB 10068-2000
Mechanical Vibration of Certain Machines with Shaft
Heights 56 mm and Higher - Measurement, Evaluation
and Limits of Vibration Severity
(IEC 60034-14:2007, IDT)
ISSUED ON: JUNE 19, 2008
IMPLEMENTED ON: JUNE 1, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative References ... 5 
3 Terms and Definitions ... 6 
4 Measurement Quantities ... 6 
5 Measurement Equipment ... 7 
6 Machine Mounting ... 7 
7 Conditions of Measurement ... 9 
8 Limits of Bearing Housing Vibration ... 10 
9 Limits of Relative Shaft Vibration ... 12 
Bibliography ... 16 
Foreword
Chapter 8 and Chapter 9 of this Standard are mandatory, and the remaining is
recommended.
This Standard equivalently adopts (IDT) IEC 60034-14:2007 Mechanical Vibration of
Certain Machines with Shaft Heights 56 mm and Higher - Measurement, Evaluation
and Limits of Vibration Severity (Version No. 3 in English).
This Standard serves as a replacement of GB 10068-2000. In comparison with GB
10068-2000, the changes are as follows:
---In Chapter 1 - Scope, the speed range is expanded from the previous 600 r/min
~ 3,600 r/min to 120 r/min ~ 15,000 r/min.
---The position requirements for measurement points of rigid mounting of vertical
machine installation are added.
---The test requirements for variable-frequency drives are added.
---The limits of vibration magnitude are modified from the evaluation of vibration
velocity only to the evaluation of three indexes: vibration displacement,
vibration velocity and vibration acceleration. The vibration magnitude is
modified from three grades (Grade-N, Grade-R and Grade-S) to two grades
(Grade-A and Grade-B).
---For machines at 600 r/min ~ 3,600 r/min, only the vibration velocity needs to be
measured in the inspection and test.
---In Table 1, the vibration magnitude is modified from three grades (Grade-N,
Grade-R and Grade-S) to two grades (Grade-A and Grade-B); the evaluation
covers vibration displacement, vibration velocity and vibration acceleration. In
addition, the limits of vibration velocity are also different from the previous
version, and the requirements are enhanced.
---In Table 2, the limits of relative shaft vibration and maximum radial run-out are
also modified.
This Standard was proposed by China Electrical Equipment Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee 26 on
Electric Rotating Machinery of Standardization Administration of China (SAC/TC 26).
The responsible drafting organizations of this Standard: Shanghai Electrical Apparatus
Research Institute (Group) Co., Ltd.; Zhejiang Jinlong Electrical Machinery Stock Co.,
Ltd.; Weiling Qingjiang Motor Manufacturing Co., Ltd.; Wolong Electric Drive Co., Ltd.;
Shanxi Explosion-proof Motor (Group) Co., Ltd.; Shandong Huali Electric Motor Group
Co., Ltd.; Xiangtan Electric Manufacturing Co., Ltd.; Liuan Jianghuai Motor Co., Ltd.;
CSIC Motor Technology Co., Ltd.; China North Locomotive and Rolling Stock Industry
Group Yongji Motor Factory; Xi’an SIMO Motor Co., Ltd.; Wuxi HWADA Electric Motor
Co., Ltd.; Shandong Qilu Motor Manufacturing Co., Ltd.; Beijing Bijie Electric Motor
Co., Ltd.; Hebei Electric Motor Co., Ltd.; Shanghai Dianke Motor Technology Co., Ltd.;
Tellhow Technology Co., Ltd.
The participating drafting organizations of this Standard: Harbin Institute of Large
Electric Machinery; China National Electric Apparatus Research Institute; Hebei
Hengshui Electric Co., Ltd.; Jiangsu Xi’anda Explosion-proof Co., Ltd.; China Yangtze
Shipping Group Electric Motor Co., Ltd.; Lanzhou Electric Corporation; Shanghai
Nanyang Electric Co., Ltd.; Anhui WanNan Electric Machine Co., Ltd.; Shanghai
Qianghui Motor Co., Ltd.; Jiangsu DZ Electric Motor Co., Ltd.
The drafters of this Standard: Li Xiuying, Ye Jinwu, Zhou Guobao, Meng Fanmin, Yang
Shulin, Zhang Wenbin, Li CHunlin, Liu Lihan, Li Baolai, He Zhixue, Li Anjin, Ge Linhai,
Wu Dezhong, Zhou Shoulian, Yang Xiujun, Kang Maosheng, Fu Changhong, Luo
Junbo.
The issuing of the previous versions:
---GB 2807-1981;
---GB/T 10068.1-1988; GB/T 10068.2-1988;
---GB 10068-2000.
Mechanical Vibration of Certain Machines with
Shaft Heights 56 mm and Higher - Measurement,
Evaluation and Limits of Vibration Severity
1 Scope
This Standard specifies the factory acceptance vibration test procedures and vibration
limits for certain electrical machines under specified conditions, when uncoupled from
any load or prime mover.
It is applicable to d.c. and three-phase a.c. machines, with shaft heights 56 mm and
higher and a rated output up to 50 MW, at operational speeds from 120 r/min up to and
including 15,000 r/min.
This standard is not applicable to machines mounted in situ, three-phase commutator
motors, single-phase machines, three-phase machines operated on single-phase
systems, vertical waterpower generators, turbine generators greater than 20 MW and
machines with magnetic bearings or series-wound machines.
NOTE: For machines measured in situ refer to applicable parts of ISO 10816 and ISO
7919.
2 Normative References
Through the reference in this Standard, the clauses of the following documents
become clauses of this Standard. In terms of references with a specified date, all the
subsequent modification sheets (excluding the corrected content) or revised versions
are not applicable to this Standard. However, the various parties that reach an
agreement in accordance with this Standard are encouraged to explore the possibility
of adopting the latest version of these documents. In terms of references without a
specified date, the latest version is applicable to this Standard.
GB 755-2008 Rotating Electrical Machines - Rating and Performance (IEC 60034-
1:2004, IDT)
GB/T 997 Rotating Electrical Machines - Classification of Types of Construction,
Mounting Arrangements and Terminal Box Position (IM Code) (GB/T 997-2008, IEC
60034-7:2001, IDT)
ISO 2954 Mechanical Vibration of Rotating and Reciprocating Machinery -