Fluessigkeitsdichtung fuer eine Hochdruckpumpe

摘要

In a high pressure pump having reciprocating pistons each mounted in a cylinder in communication with a crankcase at the lower end thereof, a tubular bearing press fit into an opening communicating the cylinder with the crankcase with the piston stem extending therethrough. The tubular bearing extends coaxial with the piston a substantial distance into the cylinder and an inverted cup-shaped member is affixed to the bottom of the cylinder to extend coaxial with and spaced radially outwardly from the tubular bearing. The parts extend axially a sufficient distance so that the lower end of the cup-shaped member always extends a substantial distance beyond the upper end of the tubular member. A weep slot is formed in the housing in communication with the opening or portion of the cylinder surrounding the upper end of the tubular bearing. Thus, liquid leaking through seals surrounding the piston is retained outside of the tubular bearing and egresses through the weep slots, rather than passing into the crankcase.