A number of geometrical curves have been used to form the wraps of scroll compressor. When the suction pressure, pressure ratio, scroll wrap height and thick, and the suction volume are constant, the effects of involute curves of circle, square, and line segment on performances of scroll compressor, such as geometrical parameters , leakage wire length, and various of gas forces acting on the orbiting scroll are analyzed in this paper. These effects of scroll wraps on performances of scroll compressor vary as the suction volume changes. The research results in this paper should be considered in scroll compressor design.
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