The poor quality of the oil scraper ring and scraping oil components of the structure design is not reasonable, installation error, machining parts wear caused by long-term operation, will cause the oil scraping function of oil wiper components decreased, resulting in oil body oil pool along the gap between the piston rod and the oil scraper ring into the tube. If there is a large amount of lubricant in the cylinder, it must be the problem of the oil scraper. The solutions are as follows.
(1) check the oil scraper ring direction is reversed, so that the oil scraper ring lost the best oil scraping effect, install the correct direction of security right is a one-way oil scraper ring blade toward the side of the fuselage.
(2) observe the abrasion of the oil scraping ring, and confirm whether the tension spring can play the role of fastening the oil scraping ring. If the wiper ring is badly worn, the oil scraper ring should be replaced, and the spring should be replaced.
(3) check gap between oil scraper ring and oil scraper box values, the gap is too small or even no gap, resulting in the oil scraper ring in oil scraper box the internal activities of the oil scraper ring blade does not close fit with the piston rod, the oil scraper ring lost good oil scraping function. On the contrary, the gap value is too large, the piston rod to do reciprocating motion, the oil scraper ring with the piston rod to move around, hit the oil scraper box, so the oil scraper ring also can not play a good role in the oil scraper, the oil scraper ring and oil scraper box clearance value should be between 0.05 ~ 0.1mm.
No connection tube structure of compressor oil flow occurs, you should consider the following reasons.
Filler leakage is the key to lube oil loss
Some people think that the lubricating oil consumption and packing leak nothing, in fact, packing leakage is the most important and direct reason for air compressor lubricating oil loss. 5L-40/8 type and 4L-20/8 type air compressor unified national standard design as an example, the compressor packing structure is at the bottom parts (near the side of the fuselage) for oil scraper ring, the upper part (cylinder side) for sealing ring, the filler component is a combined structure of both plays, oil scraping action to prevent lubricating oil into the cylinder body again, to prevent leakage of the gas cylinder, gas seal. When the oil wiper working condition, not the adhesion on the piston rod oil lubricating oil will be all scraped along the gap between the piston rod and the oil scraper ring into the cylinder, resulting in oil consumption. If the sealing ring work filler is poor, when the piston component to the cylinder head direction, it will form a negative pressure inside the cylinder, large oil and gas will be inside the fuselage is sucked into the cylinder, especially the oil scraper ring work effect is poor, oil mist and liquid lubricating oil will enter the gas cylinder. Just imagine, every minute to hundreds of reciprocating movement of the piston, there will be a number of oil and gas is sucked into the cylinder, the oil loss rate is very alarming, this is why the compressor body does not exist defects is caused by oil spills and oil will be important reason for the loss of a large number of.
The function of respirator
Install the crankshaft, connecting rod, crosshead body parts transmission parts of piston compressor, the compressor is the heart of a lubricating oil storage of lubricating oil and the lower part of the fuselage recoverylubricating transmission parts out, play a role in the tank, the equivalent of a sealed container for the ventilation in the body, prevent lubrication oil and gas formation of combustible gas explosion caused by high concentration combustion method, technological requirements of strict compressor usually uses nitrogen replacement, most of the compressor is installed in a certain number of the body of the apparatus for this purpose. Another important function of the respirator can relieve the negative pressure suction caused by the leakage of packing parts, and cause the balance effect of the loss of lubricating oil.
Prevention measures of lubricating oil loss in air compressor station
Lubricating oil is the main cause of combustion and explosion in air compressor station. How to prevent excessive entry of lubricating oil into the cylinder is the key point. The loss of lubricating oil in the oil sump is the most dangerous, once a filler of a serious leak, will be a lot of lubricating oil into the cylinder, as can be imagined.
(1) daily operation and maintenance of running compressor
Be sure to observe the oil level often through the oil plate, once the oil level exceeds the normal fuel consumption decline, should promptly identify the cause, eliminate hidden dangers. Never ignore the serious consequences of the loss of lubricating oil.
(2) suitable lubricating oil should be selected
According to the product instructions provided for the selection of lubricating oil, in order to ensure the safe operation of the compressor, put forward the requirement of lubricating oil is oil film: all should be temporary, namely continuous evaporation and update. The evaporated oil should quickly enter the cold zone of the compressor with the air, and the carbon deposition here is less harmful. Some of them have higher viscosity, evaporate more slowly, and then stay in the hot zone and oxidize strongly. Therefore, it is wrong to think that it is safer to use high flash point lubricants. The higher the flash point is, the easier the oil is to produce more carbon deposition, while the lower flash point has less carbon deposition, which is relatively stable
(3) removal of accumulated carbon deposits
Because of the avoidance of oil oxidation and decomposition is not possible, therefore, timely and regularly clean compressed air system and decomposition of waste lubricating oil is of special importance. Carbon deposit at least once every six months to clear the oil compressor ventilation channel, oil filter, oil filter in before, or before the gas tank, gas tank should be cleaned, including. Soda, alkali or sodium alkylbenzene sulfonate can be used as cleaning agent. After cleaning, the chemical agent must be removed carefully from the system, because its presence can cause corrosion and accelerate the formation of carbon deposits.
If the compressor medium requires absolutely no oil, it is recommended to replace the new wiper ring
