The Design of Efficient Screw Compressors for Delivery of Dry Air
نویسنده
چکیده
This paper describes two high efficiency oil-free screw compressors designed for dry air delivery. Their design is based on the authors’ own rack generated ‘N’ rotor profiles. The optimum rotor size and speed, together with the shape and position of the suction and discharge ports, were determined by mathematical modelling, taking full account of the limitations imposed by bearing and seal selection required to maximise endurance and reliability. Together, the two machines cover the discharge range of 350-1000 m/h. Prototype tests showed that both the volumetric and adiabatic efficiencies of these machines were higher than the published values of any equivalent compressors currently manufactured. This confirmed the advantages of both the rotor profile and the design procedure.
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