Electrically driven air pump having a drive motor balanced in situ

US5711652A · kind A · utility

Assignee

• PIERBURG GMBH · DE

Inventors

• Gunter Van De Venne · Mönchengladbach, DE
• Rainer Peters · Goch, DE
• Klaus Muckelmann · Hilden, DE

Key dates

• Filing date: Oct 30, 1995
• Grant date: Jan 27, 1998
• Expiry date: Oct 30, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2300/43
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An electrically driven air pump having a pump mechanism in a first section of a housing and an electric motor in a second section of the housing in driving engagement with the pump mechanism. First and second end covers are sealingly secured on the housing. The electric motor is supported by elastomer rings in the housing. The pump mechanism has two axially spaced rotor wheels secured on the drive shaft of the motor and a stator wheel between the rotor wheels. The electric motor is balanced, in situ, in its mounted state by adjusting that one of the rotor wheels which is exposed in the housing prior to installation of the end cover on the first section of the housing. After the motor is balanced, the end cover is press fit on the housing and stator wheel to form air-tight, friction fit seal joints therebetween in which the engaged parts which are deformed elastically or plastically.