HYDRAULIC AXIAL-FLOW PUMPING MACHINE Russian patent published in 1996 - IPC

FIELD: hydraulic machine engineering; use of cylinder blocks with antifriction sleeves in hydraulic axial-flow pumping machines press-fitted on one end in bottom part of block and mounted in supporting member on other end to form integral structure. SUBSTANCE: cylinder block is provided with releasing holes made between stiffening ribs and joined with semi-circular slots of sleeve bosses. The latter may be provided with set of drillings for their releasing. EFFECT: improved mechanical endurance of cylinder block. 4 cl, 7 dwg