Resonator with ring-shaped chamber between an inner tube and an outer wall and with a dividing rib extending from the inner tube toward the outer wall

US10403256B2 · kind B2 · utility

Assignees

• Umfotec GmbH · DE
• PROF. DR. DIETRICH DENKER · DE

Inventors

• Dietrich Denker · Lehre, DE
• Ralf Buck · Schelldorf, DE

Key dates

• Filing date: Oct 30, 2015
• Grant date: Sep 3, 2019
• Expiry date: May 10, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/30
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A resonator (1, 1′, 1″) for reducing airborne noise has at least one first ring-shaped chamber (2, 2′, 2″) arranged between an inlet piece (6, 6′) and an outlet piece (7, 7′). An inner tube (3) or inner tube pieces (4, 4″, 5) are arranged between the inlet piece (6, 6′) and outlet piece (7, 7′) and have wall apertures (18, 19, 28, 28″, 29, 29″, 30, 30″) as a connection to the adjacent ring-shaped chamber (2, 2′, 2″). The first ring-shaped chamber (2, 2′, 2″) is divided by at least one radially encircling dividing rib (13, 13′, 13″) into at least two sub-chambers (14, 14′, 14″, 15, 15′, 15″). The dividing rib (13, 13′, 13″) has a free end that, relative to the wall that is adjacent in a radial direction, forms an encircling annular space (16) for receiving an air layer that co-resonates in steady-state.