Mold press screw air compressor structure description

The circular speed of the rotor tip of the die press is an important factor affecting the standard, weight, power and transmission method of the screw air compressor. Traditionally, the circular velocity value of the tooth tip of the positive rotor is commonly used to characterize. Significantly forward top speed, air compressor weight and shape standard guidelines will be improved. In addition, after advancing the top speed, the structure of the screw air compressor of the die press is explained.

Top speed and rotational speed

The circular speed of the rotor tip is an important factor affecting the standard, weight, power and transmission method of the screw air compressor. Traditionally, the circular velocity value of the tooth tip of the positive rotor is commonly used to characterize. Significantly forward top speed, air compressor weight and shape standard guidelines will be improved.

In addition, after advancing the top speed, the relative leakage of gas through the air compressor will be reduced, and at the same time, the volume power and adiabatic power of the air compressor will be advanced. At the same time, it causes the movement of gas in the suction and exhaust orifice and the volume between the teeth to lose, the rotor conflict blast to lose, and the oil percussion loss of the oil injection machine to increase correspondingly, resulting in a decrease in adiabatic power. Theoretically speaking, only at a certain good top speed, the total loss is small, and the air compressor power is high.

In fact, the specific value of the top speed is affected by many factors, which are related to the rotor profile, working method, pressure difference, pressure ratio, exhaust volume, gas properties, open space and other factors. In addition, the structure of the machine and the roughness of the active surface of the gas also have an effect on the optimal tip speed. So, it's always within a certain scale.

Rotor diameter and length-diameter ratio

The rotor diameter of the die press is an important parameter related to the serialization of screw air compressors and the standardization and generalization of parts. The principle of determining the rotor diameter serialization is: within the scale of the optimal crest speed, the minimum number of rotor diameters is standard to meet the widest possible displacement scale. Length-diameter ratio refers to the ratio of the length of the working section of the rotor to the diameter of the positive rotor. Because the exhaust volume of the screw air compressor is proportional to the square of the rotor diameter, the exhaust volume value of the adjacent series rotor diameter is quite different, especially when the rotor diameter is large. For this reason, under each rotor diameter, a plurality of length-diameter ratios are generally selected to change the displacement scale, so that the displacement of adjacent series of rotor diameters is staggered.

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