FIELD: machine building.
SUBSTANCE: invention relates to machine building, mainly to engine building, namely to gas turbines of small dimensions (microturbines), and can be used as a component of gas turbine engines, gas turbine plants, combined-cycle plants, and also as small-size high-speed pneumatic motor. In turbine housing including high-pressure chamber, guide device and low-pressure chamber, multiturn screw is installed on bearings. Housing is made in the form of installed with radial clearance relative to screw bushing, on inner surface of which there are either screw grooves of opposite direction with screw, or annular grooves, depth of which increases in direction of low pressure chamber.
EFFECT: invention objective is to simplify the design and manufacturing process of the screw turbine, as well as to increase its efficiency.
4 cl, 3 dwg
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