AXIAL-PLUNGER PUMP Russian patent published in 2002 - IPC

FIELD: mechanical engineering; pumps. SUBSTANCE: rotor of pump is provided with peripheral channels connecting first rotor space with second rotor space. One space is connected with lower pressure space, for instance, with fuel tank, and the other is separated by web from disk cavity and is connected directly with cavity and through jet, with intake main line. Milled cuts are made on disk end face from rotor side which are connected with central hole through channels. Drilled holes made in rotor and disk are designed for fitting-in two-step pin. Diameter of drilled hole in rotor is greater then diameter of drilled hole in disk. Concentric slot is made on rotor end face from side of fitting of sleeves into rotor. One rotor space is separated from other rotor space by means of sliding bearing installed by its outer diameter in housing, rotor is arranged on its inner diameter. Inclined plate is installed on support ring with trunnions on support shoes provided with strips and installed in cavities made in pump cover. Each bearing is provided with cavities for inserts. Projection with reverse cone is provided in center of step bearing. Cone is made also on peripheral surface of step bearing cavity in which through holes are made. Projection of step bearing is fitted in cavities of each insert. Projections uniformly spaced over periphery of insert are fitted in through holes of step bearing. EFFECT: improved reliability and increased service life of pump. 7 cl, 5 dwg