compression mechanism and volute compressor

摘要

compression mechanism and volute compressor. the present invention aims to increase the strength and stiffness of a compression mechanism and to prevent its adherence simultaneously. a volute compressor (1) includes a compression mechanism (15) which compresses the refrigerant. the compression mechanism (15) includes a fixed volute (24) and a movable volute (26). the fixed volute (24) and the mobile volute (26) are formed of different materials. one of the two volutes is a cast iron cast manufactured using a semi-cast pressure foundry, while the other is a gray cast iron. gray iron cast has a tensile strength greater than or equal to 250 n / mm2 and less than 300 n / mm2.