General failures and treatments of centrifugal pump (III)
1. The pump vibration or abnormal sound
Causes and treatment methods are as follows:
(1) Similar with c (4), (5), (7), (9) the term f.
Approach is to take appropriate measures.
(2)The vibration frequency is 0 to 40% of the working speed. Excessive bearing clearance, bearing loose,
there are impurities in the oil, oil (viscosity, temperature) bad, because the
air or process liquid lead to the blister of the oil, poor lubrication, bearing damage. After checking approach is to
take appropriate measures, such as adjusting the bearing clearance, remove
impurities in the oil, replace with new oil.
(3) The vibration frequency is 60% to 100% of the
working speed. Bearing problems related with (2), or seal the gap is too large,
loose retainer, seal wear. Approach is to check, adjust or replace the seal.
(4) The vibration frequency is double of the operating speed. Misalignment, loose
coupling, seal friction and casing deformation, bearing damage, supporting
resonance, thrust bearing damage, shaft bending, poor co-ordination. Approach
is to examine and take appropriate measures, repair, adjustment or replacement.
(5) The vibration frequency is n times of the working speed. Pressure fluctuation, not the center of the housing
deformation, seal friction, bearings or basic resonance line, the machine
resonance, the same processing method (4), the reinforcing base, or tubing. diesel pump.
(6) the vibration frequency is very high. Friction shaft, seals, bearings, no
precision bearings jitter, undesirable shrinkage fit or the like. Treatment
with (4).
2.
Bearing fever
Causes and treatment methods are as follows:
(1) Bearing
pads scraping undesirable. Approach is to re-repair or replacement of the
bearing pads.
(2) The
bearing clearance is too small. Approach is to re-adjust the bearing clearance
or scraping.
(3) The amount
of lubricating oil
is lubricating, bad oil. Approach is to increase the amount of oil or
change oil.
(4) The bearing assembly is bad. Approach is to check the bearing assembly as requirement, the
eliminate
the undesirable factors.
(5) Cooling
water circuit. Approach is to check, repair.
(6) The bearing
wear or looseness. Approach is bearing repair or scrap. If relaxed,
tight relevant bolts.
(7) If the
shaft is bent. Approach is to correct the shaft.
(8) If the
oil slinger
is distorted, the
oil slinger
can’t rotate and can’t take along oil. Approach is to update the slinger.
(9) Coupling on the bad or axial clearance is too small. Approach is to check
the situation and adjustment of the axial clearance.
Honghai Pump Co.,Ltd.
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