In Roots blower, lubricating oil has the functions of lubrication, reducing friction, cooling, protection and washing. After a period of use, the lubricating oil will be polluted, aged and the leakage will be reduced. Therefore, in general, various fan equipment will set the corresponding replacement cycle according to the actual use.

當然實際應用中，羅茨風機是否需要更換潤滑油不一定是一個固定的周期，根據(jù)油品性能的變化情況，其周期可能變短也可能變長，過早換會增加使用成本，過晚換會影響羅茨風機的性能，具體的要看潤滑油實際的品質(zhì)情況，關(guān)于它的判斷可以通過幾個方面來進行判斷：

Of course, in practical application, whether the roots blower needs to replace the lubricating oil is not necessarily a fixed cycle. According to the change of oil performance, its cycle may become shorter or longer. Early replacement will increase the use cost, and too late replacement will affect the performance of Roots blower. The specific depends on the actual quality of lubricating oil. Its judgment can be judged from several aspects:

一看是否氧化變質(zhì)。這點一方面可以通過外觀進行分辨，看油的顏色是否變黑或加深，以及表面有無形成較硬的膠膜。另一方面，也可以取少量油箱底部的油泥置于食指和拇指之間進行捻壓摩擦，如果感覺到膠質(zhì)多、粘附性強，則說明潤滑油己經(jīng)嚴重變質(zhì)，需要更換。

See if it is oxidized and deteriorated. On the one hand, this can be distinguished by appearance to see whether the color of the oil turns black or deepened, and whether a hard adhesive film is formed on the surface. On the other hand, you can also take a small amount of oil sludge at the bottom of the oil tank and place it between your index finger and thumb for twisting and friction. If you feel that there are many colloids and strong adhesion, it indicates that the lubricating oil has seriously deteriorated and needs to be replaced.

二是檢查潤滑油是否混入了較多硬粒雜質(zhì)。這點與上面的檢驗方式一樣，通過取少量潤滑油用手指進行捻壓，憑借感覺即可進行判斷。

Second, check whether the lubricating oil is mixed with more hard particle impurities. This is the same as the above inspection method. It can be judged by feeling by taking a small amount of lubricating oil and twisting it with your fingers.

如果確定要進行潤滑油更換時，需要注意避免新舊潤滑油混合，清理干凈舊油后再充入新油，另外在填充過程中，要注意油量。

If it is determined to replace the lubricating oil, pay attention to avoid mixing the old and new lubricating oil. Clean up the old oil and then fill it with new oil. In addition, pay attention to the amount of oil during filling.

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