Hydropneumatic piston accumulator

US10781830B2 · kind B2 · utility

Assignee

• HYDAC TECHNOLOGY GMBH · DE

Inventors

• Horst Mannebach · Rockenberg, DE
• Peter Kloft · Ransbach-Baumbach, DE

Key dates

• Filing date: Apr 11, 2017
• Grant date: Sep 22, 2020
• Expiry date: May 25, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2201/515
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydropneumatic piston accumulator has an accumulator housing (1) with a cylindrical tube (3) defining a longitudinal axis (11). The cylindrical tube (3) is closed at both ends by housing covers (5, 7). A piston (9) is longitudinally movable in the cylindrical tube (3) and separates a working chamber (13) for a compressible medium from a working chamber for an incompressible medium. A displacement measuring device determines the position of the piston (9) in the housing in a contact-free manner. The displacement measuring device includes a non-magnetic measuring tube (29) extending along the longitudinal axis (11) from one housing cover (5) to the other housing cover (7) and through a passage (31) formed in the piston (9) and is sealed against the interior of the housing (1). In the tube (29), a position sensor (57) is movably guided and follows the piston movements in the measuring tube (29) using a magnetic force acting between the piston sensor (57) and the piston (9). A transmitter/receiver (65) for the displacement measuring device is positioned on one of the housing covers (5, 7) and emits a measurement beam through the open end (25, 26) of the measuring tube (29) to the pos…