1. Oil leakage at the compressor end of the supercharger caused by the accumulation of oil and gas at the outlet of the pressure shell: check the supercharger and confirm that the supercharger is qualified. Generally, it can be analyzed from the use of the supercharger. If the air filter is blocked and the negative pressure is more than 5.5 kPa due to the heavy dust in the use environment, the oil leakage at the compressor end of the supercharger will be caused; When the car is going down the mountain slope, the biogas generator unit will drive at a low speed for more than 15 minutes without the fuel filler door, and the gas seal cannot be established on the back of the medium-pressure impeller of the supercharger to form a vacuum, which will also cause oil leakage at the compressor end of the supercharger. As long as the air filter is maintained regularly, the idling time of biogas generator set should not be too long, and this false oil leakage 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. Too high oil pressure will cause oil leakage of supercharger: too high oil inlet pressure of supercharger of biogas generator unit is also one of the reasons for oil leakage of supercharger. When we check and confirm that the supercharger is qualified, and find that the oil pressure of the biogas generator unit is far higher than the specification, we should check whether the lubrication system of the biogas generator unit and the pressure regulating valve are stuck or malfunctioning. If the oil pressure of the biogas generator unit is normal, the oil leakage of the supercharger 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 will cause oil leakage of the supercharger: the oil return of the supercharger of the biogas generator unit is returned from the supercharger oil return pipe to the biogas generator unit by the weight of the oil. If the oil return pipe is shrunk and blocked, the oil return of the supercharger is not smooth, and the supercharger will leak oil at both ends. It should be eliminated that the oil return is not smooth, and the fault will be eliminated if the supercharger 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 stop and start of biogas generator unit during construction: Frequent stop and start of biogas generator unit during construction will cause coking at the turbine end of turbocharger intermediate casing; At the same time, coking is caused in the oil return cavity of the intermediate shell, which causes the oil return cavity of the supercharger to shrink and the oil return is not smooth, resulting in oil leakage. Check whether all vulnerable parts are in good condition 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. The serious gas channeling of biogas generator unit will cause the oil return of the supercharger to be blocked and the supercharger to leak oil: some superchargers find oil leakage or even oil leakage at both ends. After inspection, the supercharger is qualified, and the oil inlet and return are also normal. After disassembly and inspection, it is found that there is thick oil dirt and some hardening in the middle section of the supercharger's main shaft. After cleaning, it is found that the middle section of the main shaft turns pale yellow and there is oil dirt in the supercharger's oil return pipe, From the above phenomena, it can be judged that the blow-by of biogas generator unit causes poor oil return of supercharger. Replace the four matching biogas generator sets to remove the blow-by gas from the biogas generator set, clean the supercharger and oil return pipe, and eliminate the fault.