Oil leakage at the compressor end of the turbocharger caused by oil and gas accumulation at the outlet of the pressure shell: Check the turbocharger and confirm that it is a qualified product. Generally, the use of the turbocharger can be analyzed. If the environment is dusty, causing blockage of the air filter and negative pressure exceeding 5.5kPa, it will cause oil leakage at the compressor end of the turbocharger; When a car is driving downhill in a mountainous area and the biogas generator set is driven at low speed without refueling for more than 15 minutes, the inability to establish a gas seal on the back of the medium pressure impeller of the turbocharger can also cause oil leakage at the compressor end. As long as the air filter is regularly maintained, the idle time of the biogas generator set should not be too long, and this false oil leakage phenomenon can be eliminated.
Excessive oil pressure can cause oil leakage in the turbocharger: Excessive inlet oil pressure in the turbocharger of a biogas generator set is also one of the reasons for oil leakage in the turbocharger. When we confirm through inspection that the turbocharger is a qualified product and find that the oil pressure of the biogas generator set is much higher than the specifications in the manual, we need to check whether the lubrication system and pressure regulating valve of the biogas generator set are stuck or malfunctioning. If the oil pressure of the biogas generator set is normal, the oil leakage of the turbocharger can be eliminated.
Poor oil return can cause oil leakage in the supercharger: The oil return of the supercharger in the biogas generator set relies on the weight of the oil to return from the supercharger oil return pipe into the biogas generator set. If the oil return pipe shrinks or is blocked, the oil return of the supercharger will be poor, and oil will leak from both ends of the supercharger. It should be ruled out that the oil return is not smooth, and the fault should be eliminated when the turbocharger is intact.
Frequent stopping and starting of biogas generator units during construction: Frequent stopping and starting of biogas generator units during construction can cause coking at the turbine end of the intermediate shell of the turbocharger; At the same time, it causes coking in the intermediate shell return oil chamber, causing the turbocharger return oil chamber to shrink and the return oil to be blocked, resulting in oil leakage. It is necessary to check whether all vulnerable parts are intact and remove coking.
Severe gas leakage in the biogas generator set can cause poor oil return and oil leakage in the booster: some boosters are found to have oil leakage, even at both ends. After inspection, the booster is a qualified product, and the oil inlet and return are also normal. After dismantling and inspection, it was found that there is thick oil scale and some hardening in the middle section of the main shaft of the booster. After cleaning, it was found that the middle section of the main shaft has turned pale yellow and there is also oil scale in the return oil pipe of the booster, From the above phenomena, it can be inferred that the biogas generator unit's blowby caused poor oil return of the booster. Replace the four supporting biogas generator sets to eliminate the downward gas leakage of the biogas generator set, clean the booster and return oil pipe, and the fault can be eliminated.