Internally cooling rotary compression equipment

摘要

A rotary compression equipment includes: a housing having at least two intermeshing hollow rotors rotatably mounted in the housing by two shafts, each rotor formed with a hollow portion for passing a coolant in the hollow portion for cooling the meshing rotors when rotated, and a coolant passage formed in each shaft and fluidically communicated with the hollow portion in the rotor for leading coolant from the coolant passage into the hollow portion in the rotor for removing heat of the rotors outwardly for reducing thermal expansion of the rotary equipment and increasing the efficiency of the rotary equipment.