Analysis of the Causes of Excessive Temperature of ML37-WC Air Compressor
There should be no obstructions at the inlet and exhaust outlets.
2. Lubricating oil grade, cleaning, oil level Lubricating oil is not only lubricated in the air compressor, but the main function is cooling, taking away the heat generated by the gas during the compression process. Lubricants used in various types of screw air compressors should be selected in accordance with the requirements of the manual, and can not be used on their own, otherwise it will have adverse consequences. When there is no special screw compressor oil, it should be selected according to the recommendations of the manual. Pay attention to all the residual oil, and rinse it with new oil. When the air compressor is put into operation, the use of substitute oil should be closely observed to see if the oil temperature is too high, whether there are a lot of bubbles, etc. Stop using it immediately.
The cleaning of lubricating oil is very important, and many air compressor temperatures are too high.
When the temperature of the screw air compressor is found to be too high, the oil should first be checked. When the color of the lubricating oil becomes darker and a lot of bubbles are generated, the oil has started to deteriorate and should be replaced. The replacement of lubricating oil should be determined according to the working environment and the use conditions. The general work is about 2500h. If the work is less than 2500h a year, it should be replaced after one year.
High oil temperature will cause carbon to precipitate in the lubricating oil, forming coking, which will further increase the oil temperature. At the same time, the air compressor will inhale some dust during the working process. When the oil filter is dirty, the oil temperature will drop and the oil temperature will increase. Therefore, it is necessary to replace the filter regularly. It should be replaced after the first use of 150h. After 2000h, if the environment is bad, the cycle should be shortened.
When oil and gas are separated, there is always some oil discharged along with the gas, so that the lubricating oil will become less and less, and when the oil quantity is insufficient, a high temperature is formed. Therefore, the oil level should be observed frequently. When the oil level is low, the lubricating oil should be replenished in time to avoid high temperature.
3. The load of the exhaust pressure compressor increases with the increase of the air pressure. Especially when the air pressure exceeds the rated air pressure, the load is larger, and the temperature will rise rapidly. Therefore, to avoid overpressure operation, try to keep working below the rated pressure, which can keep the temperature from rising and ensure safety.
4. Cooling of the oil cooler The cooling of the lubricating oil is cooled by a fan on the one hand, and most of the heat is cooled by the cooler on the other hand. When the effect of the oil cooler deteriorates, the oil temperature will rise immediately. The cooling effect can be judged by touching the temperature difference between the inlet and outlet of the cooling water. If the oil temperature is high, the temperature of the cooling water outlet is not high, indicating that the effect of the cooler is poor, and the cleaning should be checked.
There are several reasons for the poor cooling effect: 1 There is a blockage in the oil passage of the cooler, such as the falling off of the rubber seal or the accumulation of carbon on the outer wall of the copper tube. 2 There are scales or other objects in the water passage of the cooler. Pay special attention when the hardness of the cooling water used is too high or there is more suspended solids. 3 The seal of the compartment in the cooling water passage is broken, which makes the short circuit cooling effect of the water passage worse.
Cleaning of the oil cooler can be done with a special cleaning agent. The oil road has a special carbon cleaning agent, and the water circuit has a special scale cleaning agent. The two cleaning agents are respectively poured into their respective channels, plugged with a plug, and rinsed with water for 8 hours. For the oil circuit, the water is washed with dry compressed air.
5. Temperature Control Element The oil cooler bypass has a temperature control valve. When the compressor is just started, the oil temperature is low, the performance of the lubricating oil is deteriorated, and a certain amount of water is precipitated in the cold lubricating oil. In order to protect the air compressor, the lubricating oil at this time cannot pass through the cooler, and is temperature-controlled. valve. When the oil temperature rises (typically at 55 ° C), the thermostatic valve closes naturally, allowing the oil to cool through the cooler.
When the temperature control valve is damaged, if the diaphragm is not closed, the oil will always pass through the temperature control valve without passing through the cooler, and the oil temperature will rise. Simply replace the temperature control valve or diaphragm at this point.
6. When the air compressor of the oil cut solenoid valve is stopped, it is ensured that the lubricating oil will not be ejected from the suction port, and a fuel cut solenoid valve is installed behind the oil filter. During normal operation, the solenoid valve is energized, the solenoid valve loses power when the channel is opened, the channel is closed, and the oil circuit is cut off. When starting or normal operation, if the solenoid valve is not energized, the oil temperature will rise sharply, and the protection will stop immediately. Check whether the line is broken or the electromagnetic coil is burnt out. In addition, when the diaphragm of the oil-disconnecting solenoid valve is damaged, the oil passage will not be smooth, the cooling effect will be deteriorated, and the temperature will rise accordingly.
The above only talked about several reasons for the excessive temperature of the screw air compressor. There are still many reasons for the oil temperature to rise, such as bearing damage, etc. It may also be a combination of the above reasons, which can be checked one by one. Determine the cause and take action.
Author Tonglian: Guangdong Weihua Co., Ltd. Xiyang Town, Meixian County, Guangdong Province [Editor Li Wen] Longmen Planer High Reliable Electronic Combination Travel Switch Price Accompanying City Information Free Address: No. 172, Nan Neihuan Street, Taiyuan City, Daying Pan Primary School Yan Zhihong to Huaguang Computer Department Yan Dingya equipment management and maintenance 2003 No10 maintenance and repair
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