In May 1997, the aircraft began to run trial production. After running until September, it was found that the vibration value increased slowly (the secondary level vibration value was from 65um to 95um). It was forced to stop the inspection. The cover was found to have broken the four-stage thrust surface. Adjusting the bearing fit clearance, because the bearing is a split-type sliding bearing, the shaft parallelism and the gear meshing surface are adjusted in addition to the finishing guarantee, the 3, 4-stage shaft gear and the main gear meshing surface reach more than 80%, two bearings With the clearance adjustment to the design value, the contact surface of the first and second gears and the main gear is still only 65%, and the secondary bearing clearance is too large to exceed the upper limit of 0. 02mm (if the adjustment is specified, then the gear Less than 60% of the mating surface, the adjustment is completed again, at less than 3 minutes at the rated speed, the vibration gradually rises from 80um to more than 100um, accompanied by strong noise, and the four-stage bearing is severely burned after disintegration after emergency shutdown. The tertiary shaft is also heavily worn. 3 bearing improvement The high and low pressure end bearings of the workshop 6500 air compressors are made of multi-watt block tilting self-adjusting bearings that have been running smoothly. The advantages of this bearing are: 1) the oil film is easy to form; 2) the load capacity of each tile is normal during normal operation; 3) the contact between the shaft and the bearing can be improved, and at the same time, in the operation, each tile of the tilting pad bearing The fluid dynamics generated by the journal's rotating surface adjusts its position so that each tile has an optimal oil wedge. Due to the large gap between the tiles, the oil film is discontinuous, and the instability associated with the rotation of the oil film does not exist. Installation adjustment margin is large; 4) can make up for the shortcomings caused by the deviation of concentricity. The disadvantage is that the carrying capacity is not as good as the split bearing. In addition, the replacement of the DH80 compressor into a plurality of tiltable self-adjusting bearing crude oil seals is also to be modified. After careful analysis and repeated argumentation, with reference to the maintenance practice of the 6500 air compressor, it is considered that the tilting pad is larger than the split bearing and the shaft contact surface, and the bearing energy can be satisfied. After making a decision, in order not to affect the production, it is urgent to make an order to the manufacturer. After the replacement, it was found that the vibration value decreased significantly, and the maximum vibration value decreased from 65 um to 45 um. After one year of operation in 1998, it was stable. Compared with the open-type bearing, there has been a fundamental change, and after a reasonable adjustment in February 1999, the vibration value has been further reduced to less than 40um. A satisfactory result has been achieved. Domestic large air separation (10000NM/3H) is generally equipped with air blow-through of Shenyang Blower Factory. These air compressors have different degrees of vibration affecting the operating cycle and life. We use the success of tilting self-adjusting bearings, although once The cost of bearing spare parts is increased, but the number of air compressor starts is reduced, so that the air compressor can run stably for a long time, and the uninterrupted oxygen supply to the melting workshop is achieved, ensuring the normal production of the whole plant, and the production cost of the factory in the long run. The reduction has played a key role. At the same time, it has also played a valuable reference for the transformation of other oxygen generators. 4 Conclusion At present, the smelter will eventually increase its production capacity to 300,000 tons, and the entire process of the plant will be implemented four times! The operation method, one of which is the high oxygen enrichment concentration, requires that the three sets of oxygen generators in the oxygen plant must be fully loaded, and any production equipment in the oxygen plant is not allowed to have any faults, only through the Wanli and 6500. The two systems will strengthen management, continually tap the potential transformation, and exert the maximum potential of employees and equipment. The total production capacity of the two units will reach 18,500 NM3/H, and strive to contribute to the increase in production, cost reduction and efficiency. However, as an auxiliary workshop for the main process, it is ensured that the supply of qualified oxygen to the smelting, deep digging of the internal potential to increase the technological content, continuous improvement and improvement, is still an eternal subject of oxygen production. Generally speaking, the quality of shuttlecock made from goose feather is better. 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Research on the improvement of bearing in air compressor
The 6500NM 3 /H and 10000Nm 3 /H oxygen generation units of the 1 oxygen plant were built according to the general development requirements of the plant. The commissioning of these two oxygen generators provided sufficient oxygen for the production of 150,000 tons of copper. The stable and direct operation of these two sets of units is an inevitable factor in ensuring the production of 200,000 tons of copper in our factory in 2000. After years of operation, it was found that there were some problems in the design and manufacturing process of the original oxygen generator. We have made some improvements to extend the service life of the equipment and achieve stable operation. Now one of the transformations is introduced as follows: 2 DH80-16 air compressor bearing problems The machine is manufactured by Shenyang Blower Factory. Due to the unsatisfactory handling of the components in the processing, the total error is too large. . 01毫米。 Actually reached 0. 12mm. If the two-axis parallelism is severely out of tolerance, the design requirements are not parallel.