Zhao Jianyin, Ding Zengjia, is in normal operation. Type air separation equipment, supporting DH71-3 centrifugal air compressor (produced by Shenyang Blower Factory), 4-stage compression, 3-stage cooling, H-type structure. Design flow rate 45000m3/hJ non-air pressure third and fourth stage rotor speed 10864r/min. Month's hot standby state is transferred to the start of production air compressor. Before the start of the preparation work, the normal start state is successful, each operation parameter and calendar According to normal. After ten days of operation, the DCS monitoring value of the air compressor shows that the vibration of the first and second rotors gradually increases from 61|xm) to 69|xm, which is close to the chain parking value (75|xm). There is no obvious change in the running flow, pressure, and discharge temperature. The gap between the detection sensor probes is normal, and the instrument has no obvious faults. Looking at the DCS vibration trend graph, it is found that the vibration rise is synchronous with the oil temperature rise fluctuation, and the bearing temperature is relatively stable. The increase in oil temperature is related to the increase in the temperature of the oil cooling water caused by the increase in ambient temperature. Signal acquisition was performed on the vibration of the air compressor using the Inventec EN900 offline vibration acquisition analyzer. The spectrogram shows that the ratio of the first-order rotor 1 octave to the RMS of the vibration is higher, the rise is obvious, and the waveform diagram and the purified trajectory have no obvious change. Secondly, the vibration horizontal direction is 7 to 14 times and has a sideband (week 2). From the test, once the temperature of the environment exceeds 25T, the life of the pool for every 10T increase is shortened by half. At present, the batteries used in UPS are generally maintenance-free sealed lead-acid batteries, and the design life is generally 5 years, which can be achieved under the environment required by the battery manufacturer. There is a big difference in the length of life that does not meet the required environmental requirements. In addition, the improvement of the environment will lead to an increase in the chemical activity inside the battery, which will generate a large amount of heat energy, which in turn will promote the vicious cycle of the ambient temperature rise, which will accelerate the shortening of the battery life. The float voltage and discharge voltage in the UPS power supply have been debugged to the rated value at the factory, and the discharge current increases with the increase of the load. The load should be adjusted reasonably during use. Under normal circumstances, the load should not exceed 60% of the rated load of the UPS. Within this range, the discharge current of the pool will not be over-discharged. Because UPS is connected to the mains for a long time, in the environment where the power supply quality is high and there is little power outage, the battery will be in a floating state for a long time, and the activity of the battery chemical energy and the electric energy will be reduced for a long time. Aging and shortening the service life. Therefore, it is generally determined that the discharge time of the full discharge per year can be determined according to the capacity of the battery and the load. After a full-load discharge is completed, recharge for more than 8 hours. Since the battery is in a floating state under normal conditions, it is likely that the pressure drop drops too fast during use, and the power failure occurs when the use time is not long. This requires normal testing and inspection of the battery. Currently, there is an instrument. It is specially used to test the voltage and internal resistance of the battery. When the internal resistance is too large, it can be judged that there is a problem with the battery in this section. It can be discharged and charged. If this phenomenon still exists after activation, it can be determined that the battery is damaged. replace. At present, the number of batteries for large and medium-sized UPS power supplies ranges from 3 to 80, or even more. These individual batteries form a battery pack through circuit connections to meet the needs of the UPS DC power supply. In the continuous operation of the UPS, the difference in performance and quality between the mid-week and the performance of the individual battery is degraded, and the storage capacity is not required to be damaged. When one or more batteries in the battery pack are damaged, the male personnel should check each battery to test that J is not a damaged battery. When replacing a new battery, you should strive to purchase batteries of the same model with the same manufacturer. It is forbidden to mix acid-proof batteries and sealed batteries and batteries of different specifications. 106 Equipment Management and Maintenance Maintenance and repair The vibration value of the wot-mail is slowly changing and can be judged by the fluctuation of the oil temperature. The analysis considers that the rotor is not the main cause of vibration, and the oil temperature increases the oil film and causes the vibration to increase. 7~14 times is the high frequency band, and the sideband frequency band is wider. Due to the continuous high temperature of the weather, although the use of a circulating cooling water fan to reduce the water temperature, the oil cooler water volume is maximized, etc. The air compressor shaft vibration still operates in the super alarm state and there is the possibility of interlocking at any time. On June 12, the use of external gas consumption reduction opportunities to repair the air compressor parking. Because the air compressor rotor was last balanced, in October 2007, the face was focused on the impeller rotor, gears and bearings. Dismantle the air compressor rotor, impeller and gearbox, bearing. After disintegration, it was found that the first and second impellers of the air compressor had serious fouling and some of them were zero. The main components of the test scale were Fe304 and dust. According to the analysis, the fouling on the impeller is the main cause of the rotor imbalance and high vibration. The fouling is formed by the oxidized rust on the inner wall of the suction pipe of the air compressor and the high temperature adhesion of the dust in the air to the impeller during the compression process. Checking the gear D toothing condition, it is found that the spindle gear has obvious wear marks near the edge of the tooth tip, which is suspected to be caused by foreign matter entering. It is within the technical requirements to check the matching condition of the rotor bearing. (10~20MPa) was cleaned and all were removed until the impeller color was seen. Replace the self-cleaning filter cartridge in the air suction chamber. The large and small gears were inspected in detail, no other abnormalities were found, and no foreign matter was found. Oil quality testing of the lubricating oil in the fuel tank is carried out and filtered by an off-line coalescing oil filter. The test index is within the acceptable range. A pipe and a shut-off valve are added next to the oil cooler cooling water inlet to prepare the cooling water from the freezer to reduce the water temperature. After the unit was installed, the test was carried out on June 13th. The unit operated smoothly after driving. After the normal load is applied, the vibration of the first and second rotors is maintained at about 57|xm, and the vibration of the third and fourth stages is slightly higher than that before the maintenance. The air compressor was operated for more than two months, and the ambient temperature rose to the highest water temperature and the oil temperature also rose to the highest air compressor operation and normal and stable. Through the handling of this fault, the importance of preventing impeller fouling is recognized. Make sure that the air filter cartridge replacement cycle is changed from 1 year to 6 months. If necessary, the impeller cleaning device should be installed. When the air compressor is parked for a long time, nitrogen gas should be introduced into the inlet and the channel of the carbon steel pipe to prevent oxidation. Before the lubricating oil is driven, it should be tested and filtered to prevent the wax from coalescing into a film, which will affect the cooling effect and increase the oil temperature. Further strengthen the air compressor gear vibration monitoring and deterioration trend comparison analysis to find gear faults as early as possible and prevent sudden faults from deteriorating. Even if it is short-term hot standby, it is necessary to do maintenance work well, and the inspection and maintenance preparation before driving is as full as possible. A parking failure occurs during operation to reduce the number of parking stops. [Editor Wang Qi] Third, the battery test and activation of the new battery has been rigorously tested to the site after the site in order to further check and master the performance of the battery is best tested again, and marked with the number for future maintenance. Before the test, observe the appearance of each battery. When the temperature of the battery is stable at room temperature, the test result is more accurate. jtk refers to the temperature difference between the winter cups. The battery-specific tester can be used to measure online, and the internal resistance and voltage of the measuring cesium are recorded according to the number, so that it is easy to track and control the future operation of each battery. For example, the discharge method of 100AH ​​and 12V batteries uses a special discharge instrument to alarm when a single battery is set below 10.8V, and the discharge is stopped; the overall discharge cutoff voltage can be multiplied by the number of battery segments by 10.8, and the discharge is performed when any of the conditions are satisfied. termination. If a battery is discharged for a few minutes, the battery is lower than 10.8V. At this time, the battery 0 can be exchanged and rectified to discharge the remaining batteries, and then the battery is activated after the end of the overall discharge. It is possible to re-discharge the battery for observation. It is possible that after the activation, the battery performance of this section becomes better. This phenomenon is recommended. Replace the battery. Fourth, how to determine the battery life The use of the battery as a backup power supply equipment, generally more important equipment at this time the battery performance requirements are also relatively high, the backup power supply startup time is too short and rapid deep discharge phenomenon occurs, This puts forward requirements for judging whether the battery is in the best state during normal maintenance. For this reason, at least one online monitoring can be carried out every year according to the situation, and the internal resistance of a certain battery is found to be too large, and the charge and discharge can be activated and the whole batch can be found. The internal resistance of the battery is too large, and it can be judged that the battery life is approaching. Specific judgment data: Take 100AH, 12V battery as an example, the test internal resistance is in 4~6MI1, indicating that the battery is in the optimal state. The test internal resistance is higher than this value. The performance of the pool is declining. If most of the battery internal resistance is above 20MI1, It indicates that the overall life of this batch of batteries has expired, and the internal resistance of individual batteries is too high. It is planned to replace some of the batteries as a whole too high, and prepare for the overall replacement. [Editing Ling Rui] Maintenance and repair equipment management and maintenance 17
We're professional factory producing garden tin products, such as Milk pot, retro design milk pot, galvanized milk pot, country design milk pot, farmhouse milk pot with customized logos and customized colors.
Our milk pots are made from galvanized steel and tinplate materials, which are durable and environmental-friendly, withstanding the test of time, and they can all be applied with powder coated on the suface, making the cans more colorful and beautiful.
Comparing to other similar metal milk pot manufacturers, our products are more competitive in prices, durable in quality.
We sell high quality watering cans to European, North America, enjoying a large market all over the world.
Milk pot, retro design milk pot, galvanized milk pot, country design milk pot, farmhouse milk pot Jiangmen Kimleyda Hardware Co., Ltd , https://www.kldmetalware.com