通过类别划分为罗茨鼓风机(含罗茨鼓风机、罗茨真空泵)、离心风机(含离心鼓风机、离心引风机、离心式压缩机{透平式压缩机})、轴流风机(单独高压送风叫轴流式压缩机、含风力发电机)、混流风机(一种是结合离心风机和轴流风机的特点而生产的、另一种则是结合罗茨鼓风机和离心风机特点而生产的)等四大类。风机属于是把气体压缩和气体输送机械、通过旋转的机械能转换为气体压力能和动能，并将气体做定向输送的机械设备。

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.

罗茨鼓风机入口产生负压的原因及预防措施：

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

1.气框出口水封积水过高，气体被水封住;

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

2.气框出口阀未打开或阀芯脱落;

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

3.气框出口管严重积灰并落下，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.冬天气温突然降低，气框出口管内冷凝水结冰;

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

5.由于煤气炉造气不佳或设备故障如安全挡板不开，无风入炉;

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.气框进口水封积水或气体倒流等引起气框压力急剧下降。

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.

罗茨鼓风机出现负压时，应针对其原因分别采取措施进行处理。首先应适当减少气量，以免高压机入口抽成负压，造成恶性事故，然后查明原因，分别处理，待处理正常后再加负荷。将气量减少至低程度，必然时紧急停车，待煤气系统处理正常，气框有上升趋势时，交换系统应争取时间开车。

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.

罗茨鼓风机叶片磨损原因和处理方法：

Reasons and treatment methods for blade wear of Roots blower:

1.叶片凹凸不平

1. Blade unevenness

罗茨鼓风机拆下进口消音器，如果我们发现叶片凹凸不平，这种磨损是回体颗粒导致的，输送的气体中，如果存在大颗粒物质，便会对罗茨鼓风机叶轮产生冲击，造成叶片的磨损。

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.叶轮存在裂纹

2. Impeller has cracks

如果叶片上存在裂纹或者存在一定铁屑脱落，这是由风机长期运行导致的，也可能与铸件的质量有关，属于风机疲劳应力损伤。

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.叶片存在条纹划痕

3. There are stripe scratches on the blades

出现条纹划痕，可能是由风机吸入的固体颗粒导致的，也可能是叶轮之间存在了严重的相互摩擦引起的擦伤，如果是叶片相互摩擦，风机会存在异响的情况，要判断是否是叶轮相互摩擦，还需要对风机进行拆卸，具体检查。

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.叶片存在污渍

4. There are stains on the blades

如果叶轮上存在一些油污，比如输送沼气的风机，常常会存在一些油气，这些油气会吸附一些灰尘，导致叶片的间隙变小，产生相互摩擦，影响风机叶轮的正常运转。

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.