螺杆鼓风机排气温度控制方法

使用过程中，螺杆鼓风机会有出口温度（温升）过高的问题，那如果真空的发生这样的问题的时候，又该如何去处理呢？

In the process of using, the outlet temperature (temperature rise) of screw blower is too high. How to deal with the problem of vacuum?

影响螺杆鼓风机出口温度的因素包括：鼓风机的容积效率、工作压力、内泄漏情况以及入口空气温度等。这些因素中，大部分和鼓风机的设计与工艺水平有关系，它们在鼓风机选型结束就已定型，难以改变，因此简单的就是在降低工作压力、入口温度上进行考虑。

The factors that affect the outlet temperature of screw blower include volume efficiency, working pressure, internal leakage and inlet air temperature. Most of these factors are related to the design and process level of the blower. They have been finalized at the end of the blower selection and are difficult to change. Therefore, the simple consideration is to reduce the working pressure and inlet temperature.

鼓风机入口温度和工作压力的变化会直接影响到出口温度的变化。因此，螺杆鼓风机出口温度如果太高，就可以考虑能否降低工作压力以及入口的空气温度：

The change of inlet temperature and working pressure of blower will directly affect the change of outlet temperature. Therefore, if the outlet temperature of screw blower is too high, we can first consider whether we can reduce the working pressure and the inlet air temperature

1、减少压损。

1. Reduce pressure loss.

我们可以看到压力如果上升1米水柱，螺杆鼓风机的出口温度会有所上升，因此，减少不必要的压损，可以有用降低鼓风机的出口温度，来自管路设计产生的压损、过滤器、曝气头等设备产生的压损等等。

We can see that if the pressure rises by 1 m water column, the outlet temperature of the screw blower will rise. Therefore, reducing unnecessary pressure loss can effectively reduce the outlet temperature of the blower, pressure loss from pipeline design, pressure loss from filters, aeration head and other equipment, etc.

2、降低入口温度。

2. Lower the inlet temperature.

螺杆鼓风机大多安装在室外，因此需要保证良好的通风，同时避免接近其他热源，以降低环境温度与鼓风机入口温度；如果风机是装在室内的，有条件的可以装空调，不仅可以降低设备入口空气温度，进而降低出口排气温度，同时也可以延长电机等设备的寿命。

Screw blowers are mostly installed outdoors, so it is necessary to ensure good ventilation and avoid approaching other heat sources to reduce the ambient temperature and blower inlet temperature; If the fan is installed indoors, air conditioning can be installed if conditions permit. It can not only reduce the air temperature at the inlet of the equipment, but also reduce the exhaust temperature at the outlet. At the same time, it can extend the life of the motor and other equipment.

3、装有隔音罩的，必要时打开隔音罩，如在夏天时。

3. If equipped with acoustic enclosure, open the acoustic enclosure if necessary, such as in summer.

很多的隔音罩起不到明显的隔音作用，倒是可能因封闭的环境导致内部温度增高，从而使鼓风机入口温度偏高，进而影响出口排气温度。所以在必要的场合，可以打开或放弃隔音罩。

A lot of noise enclosures do not play a significant role in sound insulation, but the internal temperature may increase due to the closed environment, which will make the inlet temperature of the blower higher, and then affect the outlet exhaust temperature. So in the necessary occasions, you can open or give up the acoustic enclosure.

鼓风机出口温度太高在很多领域会影响下一步生产作业，如在曝气领域会影响氧溶解以及微生物的生存环境等，因此在发现出口排气温度过高时应该及时处理。

If the outlet temperature of the blower is too high, it will affect the next production operation in many fields, such as in the aeration field, it will affect the oxygen dissolution and the living environment of microorganisms, so it should be dealt with in time when the outlet exhaust temperature is too high.