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What ought to I do if the bearing is hot?

wallpapers Innovations 2020-02-05
  Guide language: high bearing temperature is a not unusual and harmful fault of rotating equipment, so as to cut down the service life of the bearing, boom protection charges. When the temperature rises fast, the temperature exceeds the limit, and it will lead to an unplanned unit shutdown or load discount operation, which has a sizable effect on monetary advantages. Consequently, to speedy decide the motive of the fault and take suitable measures to resolve it is the guarantee of non-stop safe operation of the device.
  common reasons for immoderate bearing temperature:
  1) insufficient lubrication, consisting of insufficient or immoderate lubrication, lubricating oil best does now not meet the requirements, deterioration or debris;
  2) insufficient cooling. If the pipeline is blocked, the cooler is not efficiently decided on, and the cooling impact is weak;
  three) ordinary bearing, which includes bearing harm, inferior bearing assembly era, taking container clearance adjustment does now not meet the necessities;
  Four) big vibration, including the coupling alignment method, is imperfect and does now not meet the standards, rotor dynamic, and static imbalance, negative foundation tension, virtual basis, rotating stall, and surge.
  when the bearing temperature is excessive, we must clear up the problem from the subsequent factors:
  1) improper amount of oil, too little or an excessive amount of lubricating grease
  The bearing box shall be lubricated regularly as required with the aid of the work. Bearing after refueling will occasionally seem excessive temperature, the principle is too much refueling. At this point, the temperature continues to rise. After attaining a particular point (commonly 10℃~15℃ better than the average working temperature), the temperature will continue to be unchanged and then regularly decrease.
  2) Grease introduced to the bearing does now not meet the requirements or is contaminated
  The lubricating oil is not appropriate to form a uniform lubricating movie, which can not reduce the friction internally and put on the bearing. While different kinds of oils and fats are combined, chemical reactions might also occur, ensuing in deterioration and clumping of the oils and reducing the lubrication effect. Grease pollutants will also grow the temperature of the bearing on the way to fall into dirt throughout the grease, including system, resulting in grease pollutants, main to the deterioration of oil within the bearing container to damage the bearing lubrication and growth the temperature.
  Therefore, the right grease has to be selected. At some stage in preservation, the bearing box and bearing have to be cleaned, and the oil line has to be checked and dredge. Distinct types of grease cannot be combined. Fats should be delivered regularly throughout operation and preservation, and the fats must be kept correctly for moisture-proof and dustproof measures.
  3) now not enough cooling
  Test whether the pipeline is blocked. Take a look at whether or not the inlet temperature and go backwater temperature exceed the same old. If the cooler isn't suitable for choice, weak cooling effect, can't meet using necessities, should be a well-timed alternative or parallel set up of a new cooler. The axial fan ought to also take a look at the insulation and sealing of the center tube.
  4) check coupling alignment and bearing after confirming that there is no such trouble
  The look for the coupling is about to fulfill the technical standard. The thermal growth of the device in operation ought to also be taken into consideration in the timing of axial fanatics and hydraulic couplers. Because of the development of the impeller aspect of the brought about a fan, the bearing field rises; in the course of the operation of the hydraulic coupler, the temperature will increase, the bearing field expands, and the bearing increases. Therefore, the timing motor has to be higher. The dimensions of the reserved quantity must be decided in step with the characteristics of the system and the temperature parameters in operation.
  Bearing inspection especially consists of subsequent factors:
  1) Bearing first-rate
  for the duration of the system of disassembling the bearing container, first off, test whether or not the lubricating grease is rancid, caking, impurities, and so on., that's a crucial basis for judging the reasonableness of bearing damage. Secondly, check whether or not the bearing is bitten and worn. Test the floor finish of the inner and outer ring of the bearing, the rolling body and the retainer, in addition to the defects inclusive of crack, rust, peeling, pitting, and overheat discoloration. And degree whether the clearance of the bearing exceeds the same old; check whether or not there's wear, pit factor, peeling if the scenario ought to be replaced with new bearings.
  2) Bearing coordination
  It's miles crucial to fit the internal diameter with the shaft, the outer diameter with the housing while the bearing is established. If creep happens, it's going to harm the wear and tear surface, the pole or the residence, and the wear and tear powder will invade the inside of the bearing, inflicting warmness, vibration, and harm. If the interference is too huge, the outer diameter of the outer ring becomes smaller, or the internal diameter of the internal circle turns into more plentiful, reducing the inner clearance of the bearing. To choose a suitable suit for the cause, it's miles important to don't forget the residences of bearing load, length, temperature conditions, the rotation of the inner and outer earrings of diverse diseases.
  three) alter the matching clearance of sporting elements
  If the Lagerluft is just too small, the immoderate lack of shear and friction of grease within the elimination may even lead to the bearing heating. On the identical time, if the consent is just too small, the quantity of oil will decrease, for you to now not dispose of the heat generated by way of friction and will, in addition growth the temperature rise of the bearing. But, if the clearance is just too large, it will change the dynamic traits of the bearing and the rotor operation will be risky. Consequently, it is vital to choose and confirm the bearing clearance for exclusive device and service conditions.

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