Booster thrust tile overtemperature cause analysis and prevention measures

Booster thrust tile overtemperature 2020 - analysis of the causes and preventive measures 01 - 04 air separation unit 1, an overview of the company USES 'triad unit, by MANTURBO company is responsible for the compressor aerodynamic design and structure design, using the world's most advanced efficient level model to optimize the design of the matching software is adopted to improve the aerodynamic performance calculation, make sure that the unit stable working condition of a wide range, excellent technical performance, reliable operation, and provide in Switzerland to manufacture of compressor rotor, bearing, import prewhirl adjustment, water flushing nozzles and other key components. Compressor unit of radial bearings are tilting tile bearing, for the rotor supporting role, adopts the forced lubrication oil. Tilting tile bearing under any operating conditions are conducive to the best oil film formation, ant-vibration performance is good, strong ability to resist oil film oscillation, ensures that the rotor is safe, reliable and smooth running. Each radial bearing and, on two segment near the babbitt metal embedded parts have two as spare heat resistance, can accurately detect the temperature of the bearing segment, to ensure reliability of the rotor running; For perkins berea bearing thrust bearing, its main function is to absorb the rest of the rotor axial thrust. Its features are: Lord, vice thrust bearing capacity, the same bearing segment to adjust flexibly, segment of uniform load distribution, improve the bearing capacity and damping capacity. Lord, vice thrust, in two segment close to the embedded in babbitt wherever possible as spare two thermal resistance, can accurately detect the temperature of the bearing segment, to ensure the reliability of the rotor running. 2, 1) cause analysis Booster belongs to the barrel type centrifugal compressor, by adopting the structure, the vertical cylinder inside and outside the cylinder between the period of type 'O' ring, is made of rubber, because 'triad' unit operation for a long time, the air outlet temperature is higher, between the period of 'O' type sealing ring aging metamorphism, between high pressure gas section mixes up the situation, the rotor axial displacement, axial force, cannot use the thrust plate of complete balance. 2) Factory production of the same type of equipment in a nationwide investigation, has had the similar phenomenon, both experts were analyzed, and the final conclusion is to increase the unit to defects existing in design of balance disc, in the case of the unit capacity, unable to balance the rotor system of the axial force, this is the main cause of overtemperature thrust tile. 3) Stop check the booster thrust tile, thrust tile babbit layer without thoroughly, crack, burn, crushing, defects such as hair, erosion and galvanic, segment after staining examination, babbitt combined with matrix metal. Also found that main force each tile tile bearing surface of large-area oil engine-grease, surface roughness are overweight, Ra value is less than 0. 8) , we can find that, thrust tile medium oil film formed during operation is bad, bad lubrication, lead to bearing overtemperature, oil temperature is higher, a vicious cycle. 4) Booster is bad for the rotor, the thrust plate is not in the center position, undermining thrust tile the formation of oil film, it will also introduce the bearing shell temperature exceeds bid. 3, 1) preventive measures Need parking overhaul about 20 days, returned to the factory on the turbocharger rotor, increasing the balance disc radial dimensions, in order to meet production needs, from the main measures of solving the excess temperature of thrust tile; At the same time review unit of the rotor system. 2) Using the temporary parking for 2 days, to thrust tile tile technical renovation, increase its oil hole to & phi; 2. 5, thus increasing the amount of oil, let bush get adequate cooling and lubrication; To modify booster balance tube at the same time, increasing the number of empty hole, so that we can temporarily relieve excess temperature of thrust tile problem, but with the increase of amount of empty, seal between the level of damage increase, in the later thrust tile temperature exceeds bid badly. 3) Of the technical renovation of the lubricating oil station crew to retrofit the oil cooler to increase heat exchange area; Increase of oil pump motor frequency conversion device at the same time, under the condition of the bearing shell overtemperature, used to adjust the speed of the motor to adjust the frequency, so as to change the pump outlet pressure, to increase the flow of oil, to better cooling and lubrication of bearing, the effective control of bearing temperature is reached. 4) In the case of without a stop, reduce load, air separation system can effectively reduce the temperature of the bearing. （ Source: chemical equipment innovation base)