| 摘要 |
FIELD: motors and pumps.SUBSTANCE: invention relates to the pump unit for fuel supply, preferably diesel oil, to internal-combustion engine. The pump unit contains body (3), plunger pump for fuel supply to the internal-combustion engine, geared pump (2) for fuel supply to the plunger pump, drive shaft (4) installed with the possibility of rotation around its longitudinal axis (5) and to drive both the plunger pump, and the pump (2), and at least one O-ring (7) between the body (3) and shaft (4) to tight separation of two chambers (8, 9), fuel is supplied to at least one chamber. The pump unit also contains at least one reinforcement element (26) installed inside one of the chambers (8, 9) at least to limit deformation of the seal (7) under fuel pressure. The body (3) has groove (28) passing around the axis (5). The element (26) has circlip (27) secured in the groove (28), and side (30) projecting from the circlip (27) in axial direction and passing between the shaft (4) and seal (7).EFFECT: invention creates the pump unit, easy and cheap in production, in which wear of the drive shaft and seal is reduced.9 cl, 4 dwg |
