Technical characteristics of fuel inlet and outlet valve components for fuel injection pumps

Technical characteristics:

1. An oil inlet and outlet valve assembly for a fuel injection pump, comprising a plunger sleeve, a plunger, an oil inlet valve assembly and an oil outlet valve assembly; wherein the oil inlet valve assembly is installed on the upper part of the plunger cavity in the plunger sleeve, On the upper part of the valve assembly, the plunger sleeve is screwed with an oil inlet valve tight seat, the oil inlet valve tight seat is provided with an oil inlet collecting cavity communicating with the oil inlet oil path, and the plunger sleeve is also provided with The oil drain circuit connected with the plunger cavity is equipped with an oil outlet valve assembly on the oil outlet oil path in the plunger sleeve; it is characterized in that the oil inlet valve assembly adopts a flat-sealed valve assembly, including an oil inlet valve plate and an oil inlet valve Spring; The inlet valve sheet is in sealing contact with the lower end surface of the inlet valve seat, the inlet valve sheet presses down on the inlet valve spring, and the lower end of the inlet valve spring abuts on the shoulder on the upper part of the plunger cavity The oil outlet valve assembly adopts a ball valve assembly, including an oil outlet valve ball fitted with a spherical groove on the oil outlet, the oil outlet valve ball abuts on the hollow oil outlet valve stem, the oil outlet valve stem The side wall is provided with an oil inlet, the outlet valve stem is provided with an outlet valve spring positioning table, the outlet valve spring is installed in the outlet valve stem, and the outlet valve spring and the outlet valve spring are positioned The oil outlet valve spring is fitted with a hollow oil outlet valve spring seat; a valve stem and an oil valve spring are arranged between the oil outlet valve stem and the oil outlet valve spring seat Move space. 2. The oil inlet and outlet valve assembly for a fuel injection pump according to claim 1, wherein an oil drain hole is provided in the plunger sleeve, a sealing member is installed in the oil drain hole, and the upper end surface of the sealing member An oil return space is formed with the upper top of the oil drain hole, and the oil return space is connected with the oil return oil passage of the plunger cavity.

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