CENTRIFUGAL COMPRESSOR ADJUSTABLE DIFFUSER Russian patent published in 1998 - IPC

FIELD: mechanical engineering; diffusers with adjustable blades. SUBSTANCE: adjustable diffuser of centrifugal compressor has blades in compressor housing between diaphragm and diffuser wall installed for turning and provided with trunnions arranged in diffuser wall, and rotary disk mechanically coupled with blade trunnions through levers and with drive through drive lever. drive lever is installed between end face wall of housing wall of diffuser on fixed axle whose ends are arranged in end wall of housing and diffuser wall. Drive shaft of drive is installed in hole made in compressor housing shell and arranged in parallel with blade trunnions. Shafts is furnished with crank installed on end face. Radial slot is made in housing shell in plane of crank location. One end of drive lever is placed in slot for engagement with crank, and the other, for engagement with rotary disk. Rotary disk is installed by its outer diameter on rollers placed in bor made in diffuser wall. Inner bore of diffuser wall can have diameter exceeding that of outer diameter of compressor impeller. EFFECT: provision of reliable mechanical coupling between drive and blades, reduced required blade turning force. 2 cl, 3 dwg