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                INA water pump bearing damage causes and preventive measures

                Update Time :2014-05-13The view :1853

                1 improper operation

                Cause: The installation, operation or improper disassembly may cause deformation or defect cage

                Recommendation: Use proper operation, installation and removal tool

                2 insufficient lubrication

                The reason: inadequate or improper lubrication may cause abrasions or serious element INA bearing deformation

                Recommendation: Improved lubrication system, timed appropriately supplement or replace the lubricant

                3. Rust and corrosion

                Cause: Contact with water may cause water pump bearing element pitting and rusting. Bearing rust after injury at work may lead to spalling

                Recommendation: Check the seal regularly to ensure a good seal, proper storage INA Bearing

                4 Current

                The reason: When the rotation is powered may cause grooves or nicks. When the bearing is stationary, electrically operated Improper grounding can cause minor burns

                Recommendation: In front of the outside part of INA bearings welded connections to reduce or avoid the current through the bearing through proper grounding

                5 External Materials

                Reason: abrasive particle contamination and debris intrusion may result in the face of imported bearings wear, abrasions and depression

                Recommendation: remove invasive particles and debris, replace the lubricant, check the sealing system

                6. Eccentric

                Reason: eccentric, inclined or excessive load may lead to geometric stress concentration or flaking

                Recommendation: precision machining INA Bearing seat and shoulder block

                INA bearings after installation, in order to check for proper installation, operation should be checked. Small machines can be rotated by hand to verify rotate smoothly. Check the items are dysfunctional because nick, indentation caused due to poor installation, poor mount the torque generated by the processing of instability, torque due to the clearance is too small, the installation error, seal friction caused by too large and so on. If no abnormal power operation can begin.

                   Power operation, from the low-load starts to slowly improve the conditions set forth in rated operation. Commissioning checks matters as whether there is abnormal sound, water pump bearing temperature, lubricant leakage or discoloration, etc. If abnormal, should be immediately discontinued operation, inspection machinery, if necessary, to remove the INA bearing checking.

                1, the assembly to prevent foreign matter: Bearing in balancing the rotor mounted to do when it is easy to iron produced when balancing into the bearing, so do the balancing is best fitted front bearing. There are some manufacturers in order to facilitate assembly, the assembly in the bearing chamber coated with some oil or grease lubrication effect, but often it is difficult for the operator to control the amount of good, if oil or grease in the bearing chamber accumulates more in the pump shaft bearing INA bearing easily enter inside along the axis rotation. Bearing chamber preferably not coated with oil or grease, such as non-coated bearings shall not be have to control indoor accumulates.

                Great, after removing the pump shaft is characterized by rust paint in multiple sealed-type motor, the motor sounds good in the assembly, but in the warehouse for some time, the motor becomes abnormal sound: 2, rust prevention paint even bearing severe rusting. Many manufacturers will be considered a bearing problem, through our continuous publicity, and now have realized that the main motor plant is insulating paint problems. The problem is mainly because the insulating paint out of volatile acid at a temperature, humidity corrosive substance is formed, resulting in damage to the bearing INA bearing channel corrosion. The problem can only be a good choice of insulating paint, and after a period of time after the ventilation drying assembly.

                3, the shaft and the bearing housing tolerances choice and control: pump shaft bearings pressed into the bearing block should be flexible rotation without feeling. If significant rotation is not flexible, it indicates the size of the shaft is too great, the tolerance to be reduced. Even the water pump shaft bearings pressed into the shaft turned by hand after the obvious "imperfections" sense, it may be too much tolerance of the shaft or shaft roundness bad. So when good control shaft and the bearing chamber also control the roundness tolerance, many domestic manufacturers only tolerance control, no roundness control.

                4, the bearing assembly methods: Because bearings are high-precision products, such as improper assembly is likely to cause damage to the pump shaft bearing channel, resulting in INA bearing damage. Bearing in the assembly should have a dedicated mold and can not beat when pressed into the shaft force only a small circle, the circle of force only when the pressure of the big circle. When using pneumatic or hydraulic assembly requirements, touched down at the press-fit to be outside at state level, if inclined bearing channel will cause damage due to power, leaving the bearing guide ring.

                INA bearing life is associated with the manufacture, assembly, use all closely related, must all make every link in order to make the pump shaft bearing in the best operating condition, thus extending bearing life.

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