Light-medium high-energy head compressor model stage with flow coefficient of 0.0154 and design method

Abstract

The invention provides a light-medium high-energy head compressor model stage with a flow coefficient of 0.0154. The model stage comprises an impeller, a blade diffuser, a curve and a flow returner; the impeller is positioned in an inlet position of the model stage; the blade diffuser is arranged in an outlet of the impeller; the flow returner is positioned in an outlet position of the model stage; the blade diffuser communicates with the flow returner through the curve; a machine mach number Ma2 of the model stage is 0.2-0.65; a design point flow coefficient phi 1 is 0.0154; a design point energy head coefficient t is 0.68; a various frequency npol under design flow coefficient working conditions is 0.8011; and an applied flow range is 0.71-1.66 of a design point. The invention further provides a design method of the model stage. The model stage is high in efficiency, high in energy head coefficient, high in hub ratio and small in span; the model stage can be adopted to enable a light-medium compressor to achieve higher operation efficiency and wider working condition range; and meanwhile, the reduction of the rotor work rotating speed is facilitated, the bearing span is shortened, and the rotor stability is improved.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a model stage and a model stage design method of a light medium high-energy head compressor with a flow coefficient of 0.0154. Background technique [0002] Light-medium high-energy head compressors are generally used in methanol (outlet pressure below 90 kg) and fertilizer plants (outlet pressure 150-160 kg). There are about 20-30 sets of syngas units on the market every year, and the demand is large. At the same time, its Industrial products are key products that affect people's livelihood. The quality of the model and design will affect the performance, operation stability and energy consumption of the unit. [0003] At present, the efficiency of the existing light medium compressor model stage is low. At the same time, the existing model-level hub is relatively small, which is not conducive to the stability of the rotor when the number of stages is large, and there are r...

AI Technical Summary

Problems solved by technology

[0003] At present, the efficiency of the existing light medium compressor model stage is low

At the same time, the existing model-level hub is relatively small, which is not conducive to the stability of the rotor when the number of stages is large, and there are relatively large problems in the critical speed of the product, the stability of the rotor and the stiffness of the shaft, which brings great challenges to product design. difficulty

In addition, the performance of the unit is lower than that of similar foreign products

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