通過類別劃分為羅茨鼓風機(含羅茨鼓風機、羅茨真空泵)、離心風機(含離心鼓風機、離心引風機、離心式壓縮機{透平式壓縮機})、軸流風機(單獨高壓送風叫軸流式壓縮機、含風力發電機)、混流風機(一種是結合離心風機和軸流風機的特點而生產的、另一種則是結合羅茨鼓風機和離心風機特點而生產的)等四大類。風機屬于是把氣體壓縮和氣體輸送機械、通過旋轉的機械能轉換為氣體壓力能和動能，并將氣體做定向輸送的機械設備。

By category, it is divided into Roots blower (including Roots blower and Roots vacuum pump), centrifugal fan (including centrifugal blower, centrifugal induced draft fan, centrifugal compressor {turbine compressor}), axial flow fan (single high-pressure air supply is called axial flow compressor, including wind turbine generator) There are four categories of mixed flow fans (one is produced by combining the characteristics of centrifugal and axial fans, and the other is produced by combining the characteristics of Roots blower and centrifugal fan). Fans belong to mechanical equipment that compresses and transports gas, converts mechanical energy through rotation into gas pressure energy and kinetic energy, and conducts directional transportation of gas.

羅茨鼓風機入口產生負壓的原因及預防措施：

Reasons and preventive measures for negative pressure generated at the inlet of Roots blower:

1.氣框出口水封積水過高，氣體被水封住;

1. The water seal at the outlet of the gas frame is too high, and the gas is sealed by water;

2.氣框出口閥未打開或閥芯脫落;

2. The outlet valve of the air frame is not opened or the valve core is detached;

3.氣框出口管嚴重積灰并落下，使管道被堵塞;

3. The outlet pipe of the air frame has severe dust accumulation and falls, causing the pipeline to be blocked;

4.冬天氣溫突然降低，氣框出口管內冷凝水結冰;

4. In winter, the temperature suddenly decreases, and the condensed water in the outlet pipe of the air frame freezes;

5.由于煤氣爐造氣不佳或設備故障如擋板不開，無風入爐;

5. Due to poor gas production or equipment malfunction in the gas furnace, such as the safety baffle not opening and no air entering the furnace;

6.氣框進口水封積水或氣體倒流等引起氣框壓力急劇下降。

6. Water accumulation or gas backflow at the inlet of the air frame can cause a sharp decrease in the pressure of the air frame.

羅茨鼓風機出現負壓時，應針對其原因分別采取措施進行處理。應適當減少氣量，以免高壓機入口抽成負壓，造成惡性事故，然后查明原因，分別處理，待處理正常后再加負荷。將氣量減少低程度，必然時緊急停車，待煤氣系統處理正常，氣框有上升趨勢時，交換系統應爭取時間開車。

When the Roots blower experiences negative pressure, measures should be taken to address the cause separately. Firstly, the air volume should be appropriately reduced to avoid negative pressure at the inlet of the high-pressure machine, causing a malignant accident. Then, the cause should be identified and dealt with separately. After the treatment is normal, the load should be added. Reduce the gas volume to a low level, and emergency shutdown is necessary. When the gas system processes normally and the gas frame shows an upward trend, the exchange system should strive for time to start.

羅茨鼓風機葉片磨損原因和處理方法：

Reasons and treatment methods for blade wear of Roots blower:

1.葉片凹凸不平

1. Blade unevenness

羅茨鼓風機拆下進口消音器，如果我們發現葉片凹凸不平，這種磨損是回體顆粒導致的，輸送的氣體中，如果存在大顆粒物質，便會對羅茨鼓風機葉輪產生沖擊，造成葉片的磨損。

Remove the inlet muffler of the Roots blower. If we find that the blades are uneven, this wear is caused by returning particles. If there are large particles in the transported gas, it will impact the impeller of the Roots blower, causing wear on the blades.

2.葉輪存在裂紋

2. Impeller has cracks

如果葉片上存在裂紋或者存在一定鐵屑脫落，這是由風機長期運行導致的，也可能與鑄件的質量有關，屬于風機疲勞應力損傷。

If there are cracks or some iron chips falling off on the blades, it is caused by long-term operation of the fan and may also be related to the quality of the casting, which belongs to fatigue stress damage of the fan.

3.葉片存在條紋劃痕

3. There are stripe scratches on the blades

出現條紋劃痕，可能是由風機吸入的固體顆粒導致的，也可能是葉輪之間存在了嚴重的相互摩擦引起的擦傷，如果是葉片相互摩擦，風機會存在異響的情況，要判斷是否是葉輪相互摩擦，還需要對風機進行拆卸，具體檢查。

The appearance of stripe scratches may be caused by solid particles sucked in by the fan, or it may be caused by severe friction between the impellers. If the blades are rubbing against each other and there is abnormal noise in the fan, it is necessary to determine whether the impellers are rubbing against each other and disassemble the fan for specific inspection.

4.葉片存在污漬

4. There are stains on the blades

如果葉輪上存在一些油污，比如輸送沼氣的風機，常常會存在一些油氣，這些油氣會吸附一些灰塵，導致葉片的間隙變小，產生相互摩擦，影響風機葉輪的正常運轉。

If there are some oil stains on the impeller, such as in the fan transporting biogas, there will often be some oil and gas, which will adsorb some dust, causing the gap between the blades to become smaller, causing mutual friction, and affecting the normal operation of the fan impeller.