Critical Hydraulic Eccentricity Estimation in Vertical Turbine Pump Impeller to Control Vibration

Table 4

Vibration displacement when the impeller is on hydraulic unbalance.

Sr. no	Hydraulic eccentricity (μm)	Bell mouth	Shaft	Impeller	Suction bearing	Discharge bend	Motor
Maximum vibration displacement (μm)
1	0 (design)	166	78	74	60	20	44
2	200	204	125	117	93	30	71
3	300	223	149	139	109	36	84
4	400	242	172	160	126	41	98
5	500	261	196	182	142	47	112
6	688	296	239	222	173	57	137
Maximum vibration displacement (μm)
1	0 (design)	236	138	132	111	27	47
2	200	273	185	174	143	38	74
3	300	292	208	196	159	43	88
4	400	310	232	217	176	49	101
5	500	329	255	239	192	54	115
6	688	364	298	279	222	64	141