Electrohydraulic system for a valve

US11754097B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alexandre Orth · Hettstadt, DE
• Gottfried Hendrix · Kirchberg, DE
• Tor Jensen · Ski, NO

Key dates

• Filing date: Oct 20, 2020
• Grant date: Sep 12, 2023
• Expiry date: Oct 20, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K31/1635
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An electrohydraulic system includes an output shaft, a hydraulic piston, and a preload device. The output shaft rotationally drives the valve and extends along a first axis. The hydraulic piston extends along a second axis perpendicular to the first axis, is actuated by a pressure medium, and rotates the output shaft. The preload device stores energy via preloading of an elastic element, which extends along a third axis, by a hydraulic cylinder and to transmit the energy to the output shaft in the event of a fault. The hydraulic piston is guided into first and second cylinder housings, and at least one of the cylinder housings is connected to the hydraulic cylinder. A check valve is arranged between the cylinder housing and the hydraulic cylinder, and is configured to decouple the preload device from the hydraulic piston, the blocking direction going from the hydraulic cylinder to the cylinder housing.