Instrument holder and method for inspection of a dynamo-electric machine in a gap between a stator and a rotor and dynamo-electric machine having the instrument holder

US5635780A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Erich Kohlert · Erlangen, DE
• Otto Wirxel · Essen, DE

Key dates

• Filing date: Oct 11, 1995
• Grant date: Jun 3, 1997
• Expiry date: Oct 11, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/34
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A dynamo-electric machine includes a stator having a ferromagnetic yoke with an internal recess and a rotor disposed in the internal recess defining a gap between the yoke and the rotor. An instrument holder to be introduced into the gap for inspecting the dynamo-electric machine includes a frame section and instruments secured to the frame section for inspecting the dynamo-electric machine. At least one wheel set has at least three wheels for moving the instrument holder in the gap. Each of the wheels is rotatable about a respective one of approximately mutually parallel axes. A connection device is to be connected to leads for connecting the instrument holder to a control and evaluation device. At least one magnet presses the wheels of the instrument holder against the yoke in the gap. A method for inspecting the dynamo-electric machine includes introducing an instrument holder, carrying means for inspecting the machine, into the gap; and pressing the instrument holder against the yoke with at least one magnet. A dynamo-electric machine has the instrument holder disposed in the gap.