1、风量参数

1. Air volume parameters

高压罗茨风机风量参数，指的是单位时间内罗茨风机输送气体的体积，一般计量单位为：m/min或者m/h，也存在其他计量单位，高压罗茨风机因行业应用较为广泛，在某些行业中只为辅助设备，无法估算所需的风量参数，如：水泥输送、锅炉返料等。这些工况下可能只能提供单位时间的输送量，如：输送水泥15吨/小时;该物料输送量数据也可以帮助我们估测风量，风量参数是罗茨风机选型时必须要掌握的参数之一。

The air volume parameter of the high-pressure Roots blower refers to the volume of gas transported by the Roots blower per unit time, and the general measurement unit is: m/ Min or m/ h. There are also other measurement units, and high-pressure Roots fans are widely used in the industry. In some industries, they are only auxiliary equipment and cannot estimate the required air flow parameters, such as cement conveying and boiler return. Under these operating conditions, it may only be possible to provide a unit time conveying capacity, such as conveying 15 tons/hour of cement; The material conveying capacity data can also help us estimate the air volume, which is one of the parameters that must be mastered when selecting Roots fans.

2、压力参数

2. Pressure parameters

压力参数指的是高压罗茨风机的出口压力，也指的是罗茨风机需要克服的压力，粤协风机曾一再强调，罗茨风机自身并不产生压力，其克服前方管道压力的能力，我们称之为“罗茨风机压力”。因罗茨风机属于容积式风机，其压力取决于前方管道和大气压力，也是我们常说的“背压”。前方压力多少，压力表上面就会显示多少压力，超过额定压力，高压罗茨风机就会处于超压状态，烧毁电机是随时可能发生的事情。

The pressure parameter refers to the outlet pressure of the high-pressure Roots blower, which also refers to the pressure that the Roots blower needs to overcome. The Guangdong Association of Fans has repeatedly emphasized that the Roots blower itself does not generate pressure, and its ability to overcome the pressure in the front pipeline is called the "Roots blower pressure". Because Roots fans belong to volumetric fans, their pressure depends on the front pipeline and atmospheric pressure, which is also commonly referred to as "back pressure". The amount of pressure ahead will be displayed on the pressure gauge. If it exceeds the rated pressure, the high-pressure Roots blower will be in an overpressure state, and burning the motor is a possible occurrence at any time.

3、转速参数

3. Speed parameters

高压罗茨风机转速影响的有两个方面，一个是风机的风量，一个是风机的使用寿命，在其他参数确定的情况下，转速越高，风机的输送量越大;其次风机转速越高，自身磨损也就越严重，所以，同样的罗茨风机，其他参数全部一样，转速不同，那么，转速高的风机使用寿命会低于转速低的风机。以上，我们就能看出转速参数的重要性了。

There are two aspects that affect the speed of the high-pressure Roots blower: one is the air volume of the blower, and the other is the service life of the blower. When other parameters are determined, the higher the speed, the greater the conveying capacity of the blower; Secondly, the higher the speed of the fan, the more severe its own wear. Therefore, for the same Roots fan, all other parameters are the same, but the speed is different. Therefore, the service life of the fan with higher speed will be lower than that of the fan with lower speed. Above, we can see the importance of speed parameters.

4、介质参数

4. Medium parameters

并非所有气体罗茨风机都能进行输送，像酸碱性较高的气体、易燃易爆的气体，罗茨风机是不能进行输送的。例如：强腐蚀性气体，即便我们可以定制特殊材质的罗茨风机，但是强腐蚀性气体对罗茨风机损坏非常的高，很难适应此类工作环境。市面上大多是铸铁罗茨风机、不锈钢罗茨风机，也都有自己的使用标准，所以，在选型时，即便根据风量和压力能够进行选型，但对输送介质也是有一定要求。

Not all gas Roots blowers can transport gases, such as gases with high acidity and alkalinity, flammable and explosive gases, Roots blowers cannot transport them. For example, strong corrosive gases, even if we can customize Roots blowers with special materials, can cause high damage to the Roots blower and make it difficult to adapt to such working environments. Most of the Roots blowers on the market are cast iron and stainless steel, which also have their own usage standards. Therefore, when selecting, even if the selection can be based on air volume and pressure, there are certain requirements for the conveying medium.

5、密封性参数

5. Sealing parameters

上面我们提到了输送介质，罗茨风机通常输送清洁空气，也可以输送煤气、沼气等气体，在风机选型时，我们还需要考虑到一个参数：密封性，一般罗茨风机的密封都是采用涨圈+活塞环密封，但是输送有特殊气体时，可能需要采用各种机械密封，密封方式的差异，会造成风机型号浮动，也是选型必要参数之一。

As mentioned above, for conveying media, Roots blowers usually transport clean air and can also transport gases such as coal gas and biogas. When selecting a fan, we also need to consider one parameter: sealing. Generally, Roots blowers use expansion rings and piston rings for sealing, but when conveying special gases, various mechanical seals may be required. The difference in sealing methods can cause fluctuations in the price of the fan model, which is also one of the necessary parameters for selection.

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