Coolant pump for the automotive industry

US10982676B2 · kind B2 · utility

Assignee

• PIERBURG GMBH · DE

Inventors

• Stephan Zielberg · Bochum, DE
• Michael-Thomas Benra · Castrop-Rauxel, DE
• STEFAN ROTHGANG · Rheinberg, DE
• Andreas Burger · Krefeld, DE
• Helmut Prinz · Neuss, DE

Key dates

• Filing date: Jul 21, 2016
• Grant date: Apr 20, 2021
• Expiry date: Apr 18, 2037

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2270/64
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A coolant pump includes a conveying channel, a drive shaft, a coolant pump impeller arranged on the drive shaft, a control slide which controls a flow cross-section of an annular gap between an exit of the coolant pump impeller and the conveying channel, a side channel pump which includes a side channel pump impeller arranged on the drive shaft and a side channel having an inlet and an outlet where a pressure can be generated by the side channel pump impeller rotating, a pressure channel having a flow cross section which fluidically connects the outlet to a first pressure chamber of the control slide, a valve which closes the flow cross-section, a second pressure chamber arranged on a side of the control slide facing the coolant pump impeller, and a connection channel arranged from the side channel into the second pressure chamber between the inlet and the outlet.