Apparatus For Impact Testing For Electric Generator Stator Wedge Tightness
First Claim
Patent Images
1. A remote-controlled dynamoelectric machine maintenance vehicle, comprising:
- A frame;
At least one drive module attached to the frame and having a drive train that utilizes magnetic adhesion to traverse an interior ferromagnetic surface of the dynamoelectric machine;
A motor operatively connected to the drive module and responsive to a signal from a remote-controller, the motor providing a motive force to the drive train; and
An effectuator attached to the frame that is driven by a multi-stage pneumatic or hydraulic piston and cylinder assembly wherein a pneumatic or hydraulic working fluid is supplied under pressure in parallel to each stage to activate the piston to drive an impact head to strike a wedge in a coil slot in a stator of a dynamoelectric machine; and
Wherein the dynamoelectric machine maintenance vehicle is sized and configured to fit between the stator and a rotor of the dynamoelectric machine.
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Abstract
A remote-controlled dynamoelectric machine inspection vehicle that can fit and travel within a narrow air gap between a stator and rotor of a dynamoelectric machine. The inspection vehicle has an effectuator that can remotely activate a hammer driven by a high pressure pneumatic three-stage miniature piston that propels the hammer against a stator slot wedge creating an impact force that causes the wedge to vibrate. The vibrations are sensed to determine the tightness of the wedge.
41 Citations
14 Claims
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1. A remote-controlled dynamoelectric machine maintenance vehicle, comprising:
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A frame; At least one drive module attached to the frame and having a drive train that utilizes magnetic adhesion to traverse an interior ferromagnetic surface of the dynamoelectric machine; A motor operatively connected to the drive module and responsive to a signal from a remote-controller, the motor providing a motive force to the drive train; and An effectuator attached to the frame that is driven by a multi-stage pneumatic or hydraulic piston and cylinder assembly wherein a pneumatic or hydraulic working fluid is supplied under pressure in parallel to each stage to activate the piston to drive an impact head to strike a wedge in a coil slot in a stator of a dynamoelectric machine; and Wherein the dynamoelectric machine maintenance vehicle is sized and configured to fit between the stator and a rotor of the dynamoelectric machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification