Micro compressors have applications in medical devices, robotics and “nanosatellites”. The problem of active cooling for photo detectors in “nano-satellites” becomes more important because the majority of space missions target Earth observation, and passive cooling does not provide the required temperatures to achieve the desired SNR levels. Reciprocating compressors used in cryocoolers cause vibrations. VERT Rotors has built an ultralow-vibration rotary compressor with 40mm-long screws, and our prototype delivered 1:10 compression ratio. This “nano” compressor is a non-conventional conical type consisting of an Inner conical screw rotor revolving inside an Outer screw rotor.
Authors:
Olly Dmitriev, Eugene Tabota, Ian Arbon Euring, and Ceng Fimeche
2015 IOP Conf. Ser.: Mater. Sci. Eng. 90 012055
This paper presents a method of general geometrical definitions of screw machine rotors and their manufacturing tools. It describes the details of lobe shape specification, and focuses on a new lobe profile, which yields a larger cross-sectional area and shorter sealing lines resulting in higher delivery rates for the same tip speed. A well proven mathematical model was used to determine the optimum profile, compressor housing size, and compressor ports to achieve the superior compressors.
Geometry of Screw Compressor Rotors
Authors:
Nikola Stosic
Ian Kenneth Smith
Ahmed Kovacevic
Elvedin Mujic
The global market for screw compressors is expected to grow by US$4.2 billion by 2025, claims a report by Report Linker. The growth will be driven by a compounded annual growth rate of 5.4%. Once past the COVID-19 pandemic, growth is predicted to again move back to a new normal.
This report is accessible through the Report Linker website and is available for purchase.
