In order to ensure the use of biogas generator set, next analyze the specific situation of oil leakage fault of supercharger of Weiman biogas generator:

1、压壳出口因油气积累而引起的增压器压气端漏油：检查增压器，确认增压器是合格品，一般可以从增压器的使用情况来分析，如使用环境灰尘大，引起空滤清器堵塞造成负压达5.5kPa以上，即会造成增压器压气端漏油；汽车在山区下大坡，沼气发电机组不加油门低速行驶15分钟以上，增压器中压叶轮背面建立不起气封形成真空也会引起增压器压气端漏油。只要经常保养空滤清器，沼气发电机组怠速时间不要过长，这种假性漏油现象即可排除。

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 service condition of the supercharger. If the dust in the service environment causes the blockage of the air filter and the negative pressure is more than 5.5kpa, it will cause oil leakage at the compressor end of the supercharger; When the car goes downhill in the mountain area, the biogas generator set runs at a low speed for more than 15 minutes without the refueling valve, and the air 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 regularly maintained, the idle time of biogas generator set should not be too long, and this false oil leakage can be eliminated.

2、机油压力过高会引起增压器漏油：沼气发电机组增压器的进油压力过高也是引起增压器漏油的原因之一。当我们经检查确认增压器是合格品，而又发现沼气发电机组的机油压远高于说明书的规定，则要检查沼气发电机组的润滑系统，调压阀是否卡死或失灵，沼气发电机组的机油压力正常了，增压器的漏油即可排除。

2. Too high oil pressure will cause oil leakage of supercharger: too high oil inlet pressure of supercharger of biogas generator set 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 set is much higher than that specified in the manual, we should check whether the lubrication system and pressure regulating valve of the biogas generator set are stuck or fail. If the oil pressure of the biogas generator set is normal, the oil leakage of the supercharger can be eliminated.

3、回油不畅会造成增压器漏油：沼气发电机组增压器的回油是靠油的自重从增压器回油管回入沼气发电机组中，如果回油管出现缩节和阻塞，增压器的回油不畅，增压器会出现两端渗漏机油。应排除回油不畅，在增压器完好的情况下，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 set is returned from the oil return pipe of the supercharger to the biogas generator set by the self weight of the oil. If the oil return pipe shrinks and blocks, the oil return of the supercharger is poor, and the oil leakage at both ends of the supercharger will occur. The poor oil return shall be eliminated. If the supercharger is in good condition, the fault shall be eliminated.

4、沼气发电机组在施工中频繁停车起动：沼气发电机组在施工中频繁停车起动，会引起增压器中间壳涡轮端结焦；同时引起中间壳回油腔结焦，使增压器回油腔缩小回油不畅产生漏油，应检查各易损件是否完好，并清理干净结焦。

4. Frequent shutdown and start-up of biogas generator unit during construction: frequent shutdown and start-up of biogas generator unit during construction will cause coking at the turbine end of booster intermediate shell; At the same time, it will cause coking in the oil return chamber of the intermediate shell, reduce the oil return chamber of the supercharger, and cause oil leakage due to poor oil return. Check whether all vulnerable parts are in good condition and clean up the coking.

5、沼气发电机组窜气严重会造成增压器的回油不畅、增压器漏油：有些增压器发现漏油甚至两端漏油，经检查增压器是合格品，进油回油也正常，再进行拆检发现增压器主轴中段有很厚的油垢还有些发硬，铲除清洗后发现主轴中段变淡黄色且增压器回油管中亦有油垢，从以上现象可以判断为沼气发电机组窜气引起增压器的回油不畅。更换沼气发电机组四配套排除沼气发电机组下窜气，对增压器、回油管进行清洗，故障即可排除。

5. Serious gas channeling of biogas generator set will cause poor oil return of supercharger and oil leakage of supercharger: 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 normal. After disassembly and inspection, it is found that there is thick oil dirt in the middle section of supercharger main shaft and some are hard. After eradication and cleaning, it is found that the middle section of main shaft turns pale yellow and there is oil dirt in the oil return pipe of supercharger, From the above phenomena, it can be judged that the blowby of biogas generator set causes poor oil return of supercharger. Replace the four supporting parts of the biogas generator set, eliminate the gas channeling under the biogas generator set, and clean the supercharger and oil return pipe, and the fault can be eliminated.

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