Analysis of the Causes of High Temperature Jumping of Screw Air Compressor Unloading Li Shaoqing Xuchang Longgang Power Generation Co., Ltd., Chenzhou 461690, Henan Province, responded to the above questions. 1 screw air compressor working principle 2.3 temperature control valve Ingersoll Rand 00 screw air compressor using compressed air cooling oil system working under normal working conditions, air cooling oil after compression by the host, through the oil separator oil valve oil cooler Returning to the main engine, the compressed air is discharged through the minimum pressure valve and after the cooler; the whole machine consists of two parts: the oil circulation system and the air system. Working principle 1 The air compressor's own protection function is relatively perfect. It can reflect various abnormalities in the operation of the air compressor and issue an alarm signal to provide information for the diagnosis of air compressor failure. The high exhaust temperature of the main engine during the operation of the air compressor is The most common alarm signal, able to correctly analyze the cause of the high exhaust temperature of the host will play a multiplier role in our work, especially in the case of air compressor loading conditions, the host exhaust temperature is normal, but in the unloading situation, the host The exhaust gas temperature will rise and trip, and an in-depth analysis of this phenomenon will deepen our understanding of the air compressor. 2 The main engine exhaust temperature is high. The analysis is based on 1 blue for the oil circuit system, and 271 is the main exhaust temperature sensor. It mainly monitors the temperature of the oil and gas mixture discharged from the air compressor. When it exceeds 1031, it alarms. If it exceeds 1091, it will jump over the whole. Oil circulation system interrupt oil solenoid valve oil filter temperature control valve oil cooler check valve and other accessories directly affect the oil circulation, the failure mechanism and causes of each component are analyzed as follows: 2.1 oil cut solenoid valve to prevent air compressor shutdown The lubricant will not be ejected from the suction port. During normal operation, the electromagnetic valve is opened when the electric passage is opened. When the solenoid valve is turned off, the solenoid valve is de-energized, and the passage closing oil passage is cut off. When the machine is turned on or in normal operation, if the solenoid valve is not energized, the oil temperature will rise sharply to protect the machine from immediately stopping. 2.2 The oil filter CF is an oil filter, which is equipped with a differential pressure switch to judge the oil filter differential pressure. When the differential pressure is greater than 1.4, and the injection temperature is greater than 491, the oil filter alarm will be issued. If the oil filter is blocked, the oil circulation will be poor. The exhaust temperature of the main engine is high. Under normal circumstances, the oil filter core should be replaced in time. Ding is a temperature control valve. When the air compressor is just started, the oil temperature is lower. The lubricating oil performance will be determined by the lubricating oil at the same time as the room. In order to protect the air compressor, the lubricating oil will pass through the cooler without passing through the cooler. The six-channel control valve team, when the oil temperature rises at 55, the channel of the temperature control valve is closed, and the oil is cooled by the oil cooler through the temperature control valve. When the diaphragm of the temperature control valve is damaged, the lubricating oil directly passes through the human passage of the temperature control valve without passing through the oil cooler, thereby causing the oil temperature to rise. 2.4 oil cooler, and oil cooler, mainly to cool the lubricating oil to meet the host to determine the cooling effect. When the cooling effect of the oil cooler deteriorates, the oil temperature will gradually increase. The cause of this phenomenon is poor cooling water quality, fouling inside the copper tube of the cooler, resulting in a small cooling passage; the seal of the compartment in the cooling water passage is broken. Short-circuiting the waterway For the model in which the aftercooler is connected in series with the oil cooler waterway, when the aftercooler leaks, the cooling water cannot reach the oil cooler, resulting in poor cooling of the oil cooler. When the oil cooler leaks, the oil pressure in the cooler is greater than the cooling water pressure, and the lubricating oil enters the cooling water to cause the lubricating oil to be deficient in the host. 2.5 Other factors The function of the check valve is to prevent the compressed air in the separator from falling back to the main engine when the air compressor is stopped, causing a large amount of lubricating oil to be discharged from the main air inlet of the main engine without causing the oil path to be unsmooth. When the valve cartridge or the spring loses its elastic force, it is easy to inject oil. The failure of the main engine exhaust temperature sensor is also the cause of high temperature false alarm. In addition, the lubricating oil replacement is not timely, the oil is dirty or the oil is too large, causing the main row. The gas temperature is high. 3 When the unloading, the main engine exhaust temperature is high, the reason is that a certain unit of Ingersoll-Rand milk 00 screw air compressor is put into operation in 2006, and this air compressor frequently appears in March and March. The temperature of the machine jumped, observe the parameters of the operation are normal, the host exhaust temperature is 88., He Xiaoyao, ü, 觳, moo; shirt 1 replace the temperature sensor 1 filter and observe the various transport, I am normal, However, it is still untimely to jump off the machine at high temperature. The reason is confusing. Under the chance of accident, the host exhaust temperature is high during the unloading process. Compared with the above reasons, the high temperature tripping machine can not find the situation of the right seat. Special circumstances have been carefully analyzed and the final locking of the oil-disconnecting solenoid valve is not the normal task. 3.1 The diaphragm of the oil shutoff valve is damaged. In normal operation, the oil shutoff valve is fully open. In particular, the load is internal oil pressure, and the oil shutoff valve can be disengaged, so that the oil pressure is not exceeded but the oil pressure is higher during unloading. Low at 0.25; 1 or so, the diaphragm in the oil shut-off valve can not be opened or the top is not in place, resulting in poor oil path, causing the host to trip at high temperatures. 3.2 When the oil shut-off valve is unloaded, the control of closing the oil shut-off valve is that after the high-pressure switch is closed, the interlocking auxiliary contact is closed, and the oil-disconnecting solenoid valve is energized to open. Since the high-voltage switch is modified by + in March 20, vacuum connection The fungear combination switch was transformed into an electric holding vacuum contactor switch. This failure phenomenon occurred after the day of the transformation. Therefore, it is inferred that the high-pressure opening and closing point will be interrupted during the unloading, and it will also cause the high temperature of the time-lapse machine. For the above analysis, we take two measures. 1 Replace the oil-disconnecting solenoid valve 2. Increase the fan motor switch auxiliary contact that opens the oil-disconnecting valve. This contact can effectively prevent the high-voltage switch of the air compressor from interlocking with the auxiliary contact to pick up the wood food or the bow. The shutdown of the oil cut-off is caused by the high-temperature trip of the air compressor. After taking the above measures, the air compressor operation returned to normal. 4 Conclusion Air compressor main engine exhaust enthalpy is only a fault phenomenon in the operation of air compressors, other fault phenomena are not limited to the length of the space, as long as we master the working principle of air compressors, familiar with the function of each component, I can pass the phenomenon to investigate the nature of the matter, I hope this article can bring you a reference, 1 division Jingbo. Analysis of the causes of burning of large gas ash air compressors and countermeasures 1 electric power equipment, 15 淼! Division, mainly from the sulphur extraction of sulphur Ningbo Yejin Supply Chain Management Co.,Ltd , https://www.car-parts-accessories.com