Saddle bearing liner for axial piston pump

Details Saddle bearing liner for axial piston pump Saddle bearing liner for axial piston pump

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 1/20 (2006.01) F16C 33/04 (2006.01)

Patent

CA 2443433

A saddle bearing liner (30) for a variable displacement axial piston pump (10) includes two axially-spaced apart bearing surfaces (62, 64) with an offset central section (54) integrally joining them. A hollow projection (80) extends radially from the convex side of the pressure bearing section (50) and is received with a recess (82) of the housing (12) to locate the liner (30). The liner (30) has radially extending ledges (70, 72) which mate with surfaces (74, 76) of the housing (12) to inhibit skewing of the bearing liner (30) relative to the axis of the bearing surfaces (62, 64). The projection (80) is hollow and opens to the bearing surface (62) so that presurrized fluid from the housing (12) can be injected between the bearing surface (62) and the mating surface (22) of the swashblock (20). The projection (80) also prevents the liner (30) from rotating about the bearing surface axis.

Cette garniture de coussinet en berceau (30) pour pompe à piston axial à déplacement variable (10) inclut deux surfaces (62, 64) de coussinet axialement séparées avec une section centrale décalée (54) les joignant intégralement. Une protubérance creuse (80) prenant naissance radialement sur la face convexe de la section de coussinet de pression (50), est reçue avec un évidement (82) du carter (12) de façon à positionner la garniture (30). La garniture (30) comporte des arêtes orientées radialement (70, 72) qui s'adaptent aux surfaces (74, 46) du carter (12) de façon à empêcher la perte d'alignement de la garniture de coussinet (30) par rapport à l'axe des surfaces de garniture (62, 64). La protubérance (80), qui est creuse, s'ouvre en direction de la surface du coussinet (62) de façon que le fluide sous pression sortant du carter (12) puisse être injecté entre la surface du coussinet (62) et la surface complémentaire (22) du bloc oscillant (20). La protubérance (80) empêche également la garniture (30) de tourner autour de l'axe de la surface du coussinet.

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