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The main structural components of the fan are impeller, casing, air inlet, bracket, motor, pulley, coupling, muffler, transmission parts (bearings), etc. The unpowered fan uses the air heat convection caused by the natural wind and the indoor and outdoor temperature difference to drive the turbine to rotate so as to use the centrifugal force and negative pressure effect to exhaust the indoor fresh hot air.

風(fēng)機(jī)關(guān)系到系統(tǒng)的輸配能耗，是建筑節(jié)能非常關(guān)鍵的部分。根據(jù)國(guó)家空調(diào)設(shè)備質(zhì)量監(jiān)督檢驗(yàn)多年風(fēng)機(jī)檢測(cè)表明很多風(fēng)機(jī)在額定工況下都存在問(wèn)題，因此需要嚴(yán)格按照產(chǎn)品標(biāo)準(zhǔn)要求生產(chǎn)和制造風(fēng)機(jī)。風(fēng)機(jī)剛開(kāi)始工作時(shí)軸承部位的振動(dòng)很小，但是隨著運(yùn)轉(zhuǎn)時(shí)間的加長(zhǎng)。

Fan is related to the energy consumption of transmission and distribution of the system, and is a very important part of building energy saving. According to the national air conditioning equipment quality supervision and Inspection Center for many years, fan testing shows that many fans have problems under rated conditions, so it is necessary to produce and manufacture fans in strict accordance with product standards. At the beginning of the fan, the vibration of the bearing is very small, but it increases with the running time.

風(fēng)機(jī)內(nèi)粉塵會(huì)不均勻的附著在葉輪上，逐漸破壞風(fēng)機(jī)的動(dòng)平衡，使軸承振動(dòng)逐漸加大，一旦振動(dòng)達(dá)到風(fēng)機(jī)允許的值11mm/s時(shí)（用振幅值表示的允許值如下），風(fēng)機(jī)必須停機(jī)修理（清除粉塵堆積，重做動(dòng)平衡）。因?yàn)檫@時(shí)已是非常危險(xiǎn)的，用戶(hù)千萬(wàn)不可強(qiáng)行使用。在風(fēng)機(jī)振動(dòng)接近危險(xiǎn)值時(shí)，有測(cè)振儀表的會(huì)報(bào)警。

The dust in the fan will adhere to the impeller unevenly, and gradually destroy the dynamic balance of the fan, so that the bearing vibration will gradually increase. Once the vibration reaches the maximum value of 11mm / s allowed by the fan (the maximum allowable value expressed by the amplitude value is as follows), the fan must be shut down for repair (remove the dust accumulation, and do the dynamic balance again). Because it is very dangerous at this time, users must not use it forcibly. When the fan vibration is close to the dangerous value, the vibration measuring instrument will give an alarm.

風(fēng)機(jī)的軸承溫度正常時(shí)為≤70℃，如果一旦升高到70℃，有電控的應(yīng)（會(huì)）報(bào)警。此時(shí)應(yīng)查找原因，首先檢查冷卻水是否正常？軸承油位是否正常？如果一時(shí)找不到原因，軸承溫度迅速上升到90℃，有電控的應(yīng)（會(huì)）再次發(fā)出報(bào)警、停車(chē)信號(hào)，風(fēng)機(jī)開(kāi)車(chē)、停車(chē)或運(yùn)轉(zhuǎn)過(guò)程中，如發(fā)現(xiàn)不正常現(xiàn)象應(yīng)立即進(jìn)行檢查，檢查發(fā)現(xiàn)的小故障應(yīng)及時(shí)查明原因設(shè)法消除。

When the bearing temperature of the fan is normal, it is ≤ 70 ℃. If it rises to 70 ℃, the fan with electric control shall (will) give an alarm. At this time, the reason should be found out. First, check whether the cooling water is normal? Is the bearing oil level normal? If the cause cannot be found for a while, the bearing temperature will rise rapidly to 90 ℃. If there is electric control, the alarm and stop signal shall be sent again. In the process of fan start-up, stop or operation, if abnormal phenomenon is found, it shall be checked immediately, and the small fault found in the check shall be found out in time to eliminate the cause.