Kolbenpumpe

Details

Veröffentlichungs-Nr.

EP4800246

Anmeldetag

26. November 2024

Veröffentlichung

5. Juni 2025

Rechtsraum

EP

IPC

F04B53/14, F04B39/00, F16J9/20

Abstract

A reciprocating pump includes a pump body including a piston that compresses liquid and a cylinder that covers the piston from an outer side, a drive unit that causes the piston to reciprocate in a reciprocating direction, and a piston ring provided in a gap between the piston and the cylinder, in which an annular groove is formed on an outer-peripheral surface of the piston, a space in the cylinder is partitioned, by the piston ring, into a high-pressure region in which the compressed liquid flows and a low-pressure region having a lower internal pressure than the high-pressure region, the piston ring includes a high-pressure side ring disposed on a high-pressure region side in the annular groove and a low-pressure side ring provided on a low-pressure region side in the annular groove with respect to the high-pressure side ring, and a notch surface that recedes toward the high-pressure region side is formed on an end edge on an outer-peripheral side of a surface of the low-pressure side ring facing the low-pressure region side.

Anmelder

Firma

Mitsubishi Heavy Industries, Ltd.

Land

🇯🇵 Japan

Fachgebiete