Yang Shouming Chongqing Donghua Special Steel Co., Ltd. introduced 150,1 oxygen generator system from Japan. It consists of air compressor oxygen compressor expander diverter tower and liquid oxygen pump. Air compressor is the main equipment for producing oxygen. The overhaul of the air compressor is the key to the entire system.
The technical improvements made to the air compressor are based on summing up the experience of many years of maintenance.
The necessity of the improvement of the air inlet filter The stage speed of the air compressor is 13200rmin, the stage speed is 1650, for example, the exhaust temperature is 90 feet, and the speed and temperature are high. The original design of the air inlet filter uses an oil-immersed suction device. When the air compressor is working, the air enters the impeller through the oil-immersed filter, and some oil molecules are inhaled into the air compressor, and the dust in the inhaled air sticks to the impeller, and the working time is long, and the impeller is on the impeller. The accumulation of ash is thicker and thicker. Due to the high temperature, these ash forms a hard skin such as iron oxide on the impeller, which causes the raw air to be reduced, which in turn affects the oxygen production. In the annual inspection work, in addition to the oil discharge cleaning fin inspection mechanical operation device debugging automatic instrument, etc., the impeller cleaning is the most important work of overhaul. This kind of iron oxide-like hard skin is not afraid of damage to the impeller when it is removed. Chemical cleaning, manual cleaning can not guarantee clean, but also worry about breaking the dynamic balance of the impeller, causing a major safety accident of the flying car. The maintenance personnel are therefore under great psychological pressure, the maintenance cycle must not be delayed, and there are still problems when cleaning the fins. Oil pollution environment, air compressor concentricity correction method is necessary to improve the air compressor is driven by the motor, the air compressor and the motor are connected by the connecting shaft and the gear coupling 1. According to the machine technology It is required that the motor shaft axis must be higher than the air compressor shaft 0.4. After correcting according to this regulation, in the actual operation process, and under the condition that the lubrication condition is quite good, the air compressor is behind the thrust bearing and the motor slides. The temperature of the bearing is 4 5 feet higher than the temperature of other bearings. This indicates that there is an additional load at the rear thrust bearing of the air compressor and the front sliding bearing of the motor, which deteriorates the working condition of the equipment. In order to prevent equipment safety accidents, it is necessary to improve the air compressor coaxiality correction method.
Improved implementation 1. Improvement of the air inlet filter by visiting the manufacturer to collect relevant information, and fully demonstrated, and finally adopted a felt filter to replace the oil-immersed filter method, 2.
2. Air compressor coaxiality correction method improvement In theory, the active and passive connection shaft of the equipment should be kept at the same level. However, in the actual work, due to the error of manual error and the influence of the working environment, it is impossible to fully achieve. The technical requirements of the equipment are coaxiality correction according to the axis of the motor shaft being 4 mm higher than the axis of the air compressor. There is always a problem that the temperature of the thrust bearing and the front sliding bearing of the motor is 45 feet higher than that of other bearings. The root cause is that the error of coaxiality correction is too large. Therefore, combined with many years of maintenance experience, try to use the correction method 3 to adjust the coaxiality according to the axial deviation of 0 radial deviation of ± 0.03. Specific method 4, the diameter of the motor coupling step 200 coupling to 4 distance 1000, to 5 distance 2000, the percentage start value is +3. When the percentage needs to be loaded with the equipment correction rotation week, then the first control is passed. Priority feeding, until the end of feeding, 152 suction can continue to feed. 4 is the feeding timeout alarm. If the 4mi1j is exceeded in the fixed time limit program, and the material level signal of the 160 suction device is still not obtained, the alarm finger is given, and the operator is checked whether the vacuum and the material conveying system are faulty. .
The above program logic relationship is not too complicated, but there are many time interlocking relationships, so more time relays are used to satisfy the timing relationships. After the programming is completed, software simulation can be performed to understand how the program runs and to be familiar with the relationship between the various work steps. The simulation ends through the computer serial communication port, using 313 0300! The dedicated communication line downloads the program to the 1000 power-on operation of the connected line, and observes the actual running effect program again. The computer has completed the debugging through the simulation operation. In the actual circuit, the technical re-election equipment of No. 98, Chaoyang North Street, Beiding City, å¡And maintenance 2.1., 4, calculate the radial left and right difference calculation radial upper and lower difference according to the above calculated difference, and then multiply the distance ratio of the coupling to the screw, 2000 + 200 + force = 14, not 5 should Move 141 to the left. The radial difference is adjusted as follows: The motor should be moved to the left by 0. and the decrease 1 is adjusted according to the above calculated value. After several corrections, the specific number of times is related to the experience and proficiency of the maintenance personnel, and the requirements of the standard can be met.
Improved effect The impeller filter 1 impeller ash is reduced, and since no oil molecules are inhaled, the ash is easily removed. The previous impeller cleaning work required 6 people for 8 days, now only 2 people and 3 days, the amount of cleaning work is greatly reduced.
2 The felt filter is easy to overhaul. It only needs to change the felt after running for a period of time, thus avoiding the tedious and time-consuming work of draining and cleaning the fins, which also greatly reduces the workload.
Solved the problem of oil pollution in the environment when cleaning fins.
The air compressor coaxiality calibration equipment is calibrated according to the above calculated values ​​and put into operation. The temperature of the thrust bearing and the front sliding bearing of the motor is reduced by 451. After a running cycle, the bearing is in good condition without any abnormal. After the equipment has been improved for nearly 10 years, the above bearings have never been replaced and are still in normal use. The company has determined that the axial deviation is zero radial deviation of ±0.03 as the standard value of the coaxiality correction after the equipment is overhauled.
Each device has a fixed life. The initial operation of the equipment has many faults. This is the running-in period of the equipment. The middle period is the normal wear period, and the wear and tear is accelerated in the later stage of the equipment operation, causing frequent failures. This must be based on a scientific attitude and meticulous and serious spirit, digesting the relevant technical materials of the absorption equipment, exploring its operating rules, constantly summing up the courage to explore and dare to innovate, in order to discover the inadequacies of the equipment and find solutions to the problem, thus Achieve the purpose of reducing labor intensity and extending the service life of the equipment. When the company introduced the 15 诎 oxygen concentrator from Japan to the company to inspect the operation of the equipment, it believes that this equipment can only be operated for a long time and cannot be guaranteed to be used normally. However, after scientific maintenance and necessary technical improvements to the equipment, it has been in normal use for more than 20 years. W10.0424 District Shuangbei Tuanjieba No. 143 400032 edited Wang Qi technical transformation, reading record 5.
Calculate the axial up and down difference to calculate the axial left and right difference ES equipment management and maintenance 2010 application 4
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