1. 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 and causes the air filter to block, resulting in a negative pressure of over 5.5kPa, it will cause oil leakage at the compressor end of the turbocharger; When a car is driving down a steep slope in a mountainous area, the biogas generator set will drive at a low speed without refueling for more than 15 minutes. If the gas seal cannot be established on the back of the medium pressure impeller of the turbocharger, forming a vacuum, it can also cause oil leakage at the compressor end of the turbocharger. 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.

2、機油壓力過高會引起增壓器漏油：沼氣發電機組增壓器的進油壓力過高也是引起增壓器漏油的原因之一。當我們經檢查確認增壓器是合格品，而又發現沼氣發電機組的機油壓遠高于說明書的規定，則要檢查沼氣發電機組的潤滑系統，調壓閥是否卡死或失靈，沼氣發電機組的機油壓力正常了，增壓器的漏油即可排除。

2. Excessive oil pressure can cause oil leakage in the supercharger: Excessive inlet oil pressure in the supercharger of biogas generator sets is also one of the reasons for oil leakage in the supercharger. 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 the lubrication system of the biogas generator set, whether the pressure regulating valve is stuck or malfunctioning, and if the oil pressure of the biogas generator set is normal, the oil leakage of the turbocharger can be eliminated.

3、回油不暢會造成增壓器漏油：沼氣發電機組增壓器的回油是靠油的自重從增壓器回油管回入沼氣發電機組中，如果回油管出現縮節和阻塞，增壓器的回油不暢，增壓器會出現兩端滲漏機油。應排除回油不暢，在增壓器完好的情況下，故障也即排除。

3. Poor oil return can cause oil leakage in the supercharger: The oil return of the supercharger of a biogas generator set is returned from the supercharger oil return pipe to the biogas generator set by the weight of the oil. If there is a contraction or blockage in the oil return pipe, the oil return of the supercharger will not be smooth, and oil leakage will occur at both ends of the supercharger. It should be ruled out that the oil return is not smooth, and the fault can be eliminated even if the turbocharger is intact.

4、沼氣發電機組在施工中頻繁停車起動：沼氣發電機組在施工中頻繁停車起動，會引起增壓器中間殼渦輪端結焦；同時引起中間殼回油腔結焦，使增壓器回油腔縮小回油不暢產生漏油，應檢查各易損件是否完好，并清除結焦。

4. 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 turbocharger intermediate casing; At the same time, it causes coking in the intermediate shell oil return chamber, causing the turbocharger oil return chamber to shrink and the oil return is not smooth, resulting in oil leakage. It is necessary to check the integrity of all vulnerable parts and remove coking.

5、沼氣發電機組竄氣嚴重會造成增壓器的回油不暢、增壓器漏油：有些增壓器發現漏油甚至兩端漏油，經檢查增壓器是合格品，進油回油也正常，再進行拆檢發現增壓器主軸中段有很厚的油垢還有些發硬，鏟除清洗后發現主軸中段變淡黃色且增壓器回油管中亦有油垢，從以上現象可以判斷為沼氣發電機組竄氣引起增壓器的回油不暢。更換沼氣發電機組四配套排除沼氣發電機組下竄氣，對增壓器、回油管進行清洗，故障即可排除。

5. Severe gas leakage in the biogas generator unit can cause poor oil return of the turbocharger and oil leakage from the turbocharger. Some turbochargers have found oil leakage, even at both ends. After inspection, the turbocharger is qualified and the oil inlet and return are normal. After disassembly and inspection, it was found that there are thick oil stains and some hardening in the middle section of the turbocharger's main shaft. After cleaning, it was found that the middle section of the main shaft has turned pale yellow and there are also oil stains in the turbocharger's oil return pipe, From the above phenomenon, it can be inferred that the gas leakage of the biogas generator unit causes poor oil return of the turbocharger. Replace the four matching biogas generator sets to eliminate gas leakage from the biogas generator set, clean the turbocharger and return oil pipe, and eliminate the fault.