Standard No.:	GB/T 11348.2-2007
Chinese Name:	旋转机械转轴径向振动的测量和评定 第2部分: 50MW以上 额定转速1500r/min、1800r/min、3000r/min、3600r/min陆地安装的汽轮机和发电机
English Name:	Mechanical vibration—Evaluation of machines vibration by measurements on rotating shafts—Part 2:Land-based steam turbines and generators in excess of 50 MW with normal operating speeds of 1 500/r/min，1 800 r/min 3 000 r/min and 3 600 r/min
Professional Classification:	J04 Basic standards and general methods
Professional Classification:	GB National Standard
ICS Classification:	17.160
Issued by:
Issued on:	2007-04-30
Implemented on:	2007-11-01
Status:	ABOLISHED
Replace:	GB/T11348.2-1997 Mechanical vibration of non-reciprocating machines--Measurements on rotating shafts and evaluation criteria--Part 2: Large land-based steam turbine generator sets
Replace By:	GB/T11348.2-2012 Mechanical vibration—Evaluation of machines vibration by measurements on rotating shafts—Part 2:Land-based steam turbine-generators in excess of 50 MW with normal operating speeds of 1 500 r/min,1 800 r/min,3 000 r/min and 3 600 r/min
Replace By Date:	2013-03-01
Language:	English
File Format:	PDF
Word Count:
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1 Scope

This part specifies measuring method and evaluate criteria for radial vibration of rotating shaft located at or near bearing of turbines and generators; they include:
- Vibration under working condition of normal and stable operation;
- Transient vibration including raising speed or deceleration by resonance speed;
- Vibration changes generated under working condition of normal and stable operation.
In a general way, vibrational state of turbines and generators shall be evaluated on two aspects of vibration on rotating shaft and bearing block.
This part is applicable to steamship sails and generators with the normal operating speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/min and the power above 50 MW; it’s also applicable to turbines and generators (such as combined cycle application) connected with combustion gas turbines directly; here the criteria of this part can only be used for turbines and generators. Vibration of combustion gas turbine shall be evaluated according to GB/T 11348.4 and GB/T 6075.4.

2 Normative References

The following normative documents contain provisions which, through reference of GB/T 11348 in this part, constitute provisions of this part. For dated normative references, thereof whereafter all the change notifications (excluding correction contents) or revisions are not applicable to this part without exception. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, thereof latest editions are applicable to this part.