High exhaust temperature is the most common failure of screw air compressors

High exhaust temperature is the most common failure of screw air compressors, and its harm is also greater. Long-term operation of equipment under high exhaust temperature conditions mainly has the following hazards:

(1) The higher the exhaust temperature, the larger the gap left by the compressor to consider expansion, and the efficiency of the compressor will decrease, resulting in the consumption of electricity and the decrease in gas production;

(2) Reduce the service life of oil;

3). High exhaust temperature will cause more lubricating oil to be in the gas phase and increase the difficulty of oil separation, which will cause more oil to enter the gas supply pipe network, which will not only increase the fuel consumption, but also reduce the quality of the gas supply, which may affect the consumption. Quality of gas equipment;

4) Long-term operation of the equipment under high exhaust temperature conditions will result in reduced service life;

5) Increase the ambient temperature and cause the suction temperature to rise. Under the condition of consuming the same power consumption, every time the suction temperature increases by 3°C, the gas production decreases by %.

In this regard, through testing and analysis of unit performance, it was decided to adopt some unconventional methods to solve:

1. Redesign and process the temperature control valve core and implement self-made substitution:

The temperature control valve is the most important core control element of the oil circuit system of the air compressor, and the components of the imported temperature control valve core have been difficult to meet the technological requirements of the old unit. In this regard, the design of two temperature control valve core components is used instead.

Element A Element B

Element A: Used for long-term high outdoor temperature weather (outdoor temperature above 25℃).

Element B is used for long-term low outdoor temperatures.

The design flow of the two components A and B is basically the same. Theoretically, the design flow is about 2% larger than that of the original imported temperature control valve. However, because the resistance of the self-made temperature control valve core is larger, it can be considered that the design flow is basically equal.

2. Water network transformation:

Transform the water system pipe network in the unit. Cancel the original backflushing waterway (the dotted line in Figure 1), and change the series pipe network in the unit to a parallel pipe network (Figure 2: The dotted line is the original pipe, and the thick line is the modified pipe). After the change, the hydraulic resistance of the pipe network is greatly reduced, and the amount of water entering the oil cooler is increased, reducing the oil temperature and finally reducing the exhaust temperature.

3. Air intake modification:

The original air inlet is in a relatively sealed unit, and the air temperature inside the unit is about ℃ higher than that outside the unit.