Fan wheel and method for making a fan wheel

US11795961B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Jan Pawlowski · Poppenweiler, DE
• Benjamin Barth · Waterloo, CA

Key dates

• Filing date: Jun 1, 2022
• Grant date: Oct 24, 2023
• Expiry date: Jun 1, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/16
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The disclosure concerns a fan wheel, including a base body with a rotational axis, and a swing part. The base body is made of a first material and the swing part is made of a second material. The density of the second material and the density of the first material are different. The swing part has a surface. The swing part is at least partially surrounded by the base body, so that the base body covers at least 80%, in particular at least 90%, preferably at least 95% of the surface of the swing part. The first material has a first thermal expansion coefficient, and the second material has a second thermal expansion coefficient. The second thermal expansion coefficient amounts to 70% to 110%, in particular 80% to 100%, preferably 85% to 95% of the first thermal expansion coefficient, and/or the swing part is substantially annular and runs fully closed around the rotational axis.