A Highly Reliable Displacement Classification Mechanism for Pumps

Abstract

The invention discloses a highly reliable displacement classification mechanism for a pump, which comprises a piston, a roller, a pin, a push rod, a piston seat, a piston seal, a push rod seal, a push rod seat and a swing frame. The axial direction of the piston is arranged symmetrically on both sides of the large-diameter end face of the piston. The roller is installed in the roller groove in the middle of the large-diameter end of the piston. The piston forms a piston chamber in the piston seat. The push rod moves to the right until the limit of the bottom surface of the push rod. The push rod forms a push rod cavity in the push rod seat. The high-pressure oil enters the push rod cavity from the oil inlet hole of the push rod, and pushes the push rod and the piston to move left until the limit of the bottom surface of the piston. , The roller moves left and right with the piston, and the roller rests on the lug position of the swing frame. The maximum swing angle position of the swing frame is limited by the limit position of the roller. The invention can automatically change the position of the swing frame limit mechanism by responding to the input of high-pressure kerosene from the outside, so as to realize the switching function of the displacement gear of the pump, and has a compact structure and high reliability.

Description

technical field [0001] The invention relates to a highly reliable displacement classification mechanism for a pump, which is a highly reliable swash plate limiting mechanism suitable for a swash plate type constant pressure variable plunger pump and can realize double gear switching, and belongs to the technical field of plunger pump design. Background technique [0002] Servos require extensive ground testing prior to delivery. The power of the servo system in the ground test phase and the launch flight phase is generally different, so the power requirements for the plunger pump are also different, and the difference between large and small power can sometimes reach more than three times. It is common practice to use different variable displacement plunger pumps for the ground test phase and the flight phase. With this method, two sets of primary energy sources are required to support two types of plunger pumps, the system structure is complex, the workload of product stat...

AI Technical Summary

Problems solved by technology

Using this method, two sets of primary energy sources are required to support two types of plunger pumps, the system structure is complex, the workload of product status control and maintenance is heavy, and the reliability is affected

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