Self-adaptive unbalance loading combined type valve plate for plunger pump

The invention relates to a self-adaptive unbalance loading combined type valve plate for a plunger pump. According to the technical scheme, the valve plate is formed by nesting a first valve plate sheet (1) and a second valve plate sheet (3), a seal ring (2) is installed between the first valve plate sheet (1) and the second valve plate sheet (3), and the first valve plate sheet (1) and the second valve plate sheet (3) are circulate disks with equal diameters. A center through hole (5) is formed in the valve plate, an oil suction window (4) is formed in one side of the center through hole (5), an oil pressing window (6) is formed in the other side of the center through hole (5), and the oil suction window (4) and the oil pressing window (6) are both C-shaped through holes. The inner side face of the first valve plate sheet (1) is evenly provided with convex plates (7), and the convex plates (7) are located on the edge of the first valve plate sheet (1). Grooves (9) are correspondingly formed in the inner side face of the second valve plate sheet (3), and the convex plates (7) and the grooves (9) are mutually nested; an annular sealing groove (8) is formed in the inner side face of the second valve plate sheet (3). The self-adaptive unbalance loading combined type valve plate for the plunger pump has the advantage that the cost is low, the machining is simple, and the service life is long.