Multi stage blowers are widely used in the industrial field, but sometimes there may be high outlet temperatures that affect their normal operation and efficiency. The following are some of the main reasons.

Firstly, the gas compression process itself generates heat. A multi-stage blower continuously compresses gas through multi-stage impellers, and the collision and friction between molecules increase during the compression process, resulting in an increase in gas temperature. Moreover, if the multi-stage blower has multiple stages and a high compression ratio, it will generate more heat, leading to an increase in outlet temperature.

Secondly, poor sealing performance is also an important factor. If there is a leakage problem with the sealing devices such as the shaft seal and gas seal of the blower, external air may leak into the interior of the blower and mix with high-temperature gas, resulting in an increase in the total amount of gas and releasing more heat during the compression process, thereby increasing the outlet temperature. Meanwhile, leakage can also lead to a decrease in the efficiency of the blower, further exacerbating the phenomenon of temperature rise.

Furthermore, the malfunction of the cooling system cannot be ignored. Multi stage blowers are usually equipped with cooling devices to control temperature, such as lubricating oil cooling systems, gas cooling systems, etc. If the cooling water pipeline is blocked, the cooling water flow is insufficient, or the cooling fan malfunctions, the cooling effect will deteriorate, making it difficult to timely remove the heat generated during the operation of the blower, resulting in an increase in outlet temperature.

In addition, changes in operating conditions can also affect the outlet temperature. For example, when the temperature, pressure, humidity, etc. of the imported gas change, it will alter the specific heat capacity and compression ratio of the gas, thereby affecting the outlet temperature of the blower. In addition, if the blower operates at overload during operation, it will also cause the outlet temperature to rise.

In addition, the aging and wear of equipment can also lead to a decrease in the performance of the blower, resulting in an increase in outlet temperature. For example, the wear of the impeller can cause poor gas flow, increase friction losses, and generate more heat.

Understanding the reasons for the high outlet temperature of multi-stage blowers can help take corresponding measures for optimization and maintenance, and improve the operational efficiency and reliability of blowers.