How does a single screw pump increase the pressure of liquid?
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How does a single screw pump increase the pressure of liquid? How are the stages of a single screw pump divided? How to calculate the first stage? As shown in the picture below, why are two universal joints used in the middle section? Is one useful? The screw axis itself is eccentric, so why is a universal joint needed? Why is the structure of a single-screw compressor different from that of a single-screw pump? It is composed of two planetary gears?
Through the rotation of the screw, a cavity that continues to move forward is formed between the screw and the stator (bushing), forming continuous transportation. The number of stages is the number of stably existing cavities within the length of the screw. The more stages, the greater the pressure achieved. The function of the universal joint is to enable the screw to rotate at the appropriate position independently.