High speed rotor with removable can

• US 4,598,218 A
• Filed: 11/30/1984
• Issued: 07/01/1986
• Est. Priority Date: 08/17/1983
• Status: Expired due to Fees

• Current Assignee: Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Sundstrand Corporation (Rtx Corporation)
• Inventors: Aleem, Mohd A., Wefel, Jerry D., Lobsinger, James L.
• Primary Examiner(s): Skudy, R.
• Application Number:
  US06/677,673
• Time in Patent Office: 578 Days
• Field of Search: 310/42, 310/211, 310/85, 310/86, 310/87, 310/228, 310/261, 310/262, 310/264, 310/265, 310/216, 310/270, 310/179, 29/598, 29/426.4, 83/54, 83/179, 83/187
• US Class Current: 310/216.055
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 15/0006 Disassembling, repairing or modifying dynamo-electric machines repairing of cooling fluid boxes H02K15/0093
• CPC Class Codes: Y10T 29/49012 Rotor
• CPC Class Codes: Y10T 29/49821 by altering or destroying work part or connector
• CPC Class Codes: Y10T 83/0596 Cutting wall of hollow work

Abstract

According to the invention, a rotor is provided having a cylindrical core and a protective can closely fit and secured with the core. The core is provided with two axially spaced, annular reliefs spaced inwardly from points of welding which secure the can and core and connected by at least two circumferentially spaced, axial reliefs. To effect removal of the can, a cutting tool is extended through the can along the extent of the reliefs. With the cuts completed, access sections are defined and are separable from the core. The remainder of the can, including the weld material, can be machined off using conventional techniques.

Claims

1. In a rotor of the type having a core subassembly having opposed ends, an outer peripheral surface and a rotational axis and a cylindrical can having inner and outer surfaces, said inner surface disposed closely over and fixed to the outer surface of the core subassembly, the improvement comprising:

a plurality of annular reliefs in the outer peripheral surface of the core subassembly; and

a plurality of axially extending reliefs in the outer surface of the core subassembly and each intersecting both of the annular reliefs,

said reliefs permitting cutting of the can completely through the can over the reliefs without damaging the core subassembly;

whereby with the can cut over the reliefs said can can be separated from the core subassembly to expose the core subassembly for refurbishment thereof.

2. The improved rotor of claim 1 wherein said core subassembly comprises a core and an end turn support at each axial end of the core and said annular reliefs provided in the end turn supports.

3. The improved rotor of claim 1 wherein said core has an axial recess with a longitudinally extending wall and a wedge is provided in the recess to accommodate field windings, said wedge in conjunction with the wall defining the axially extending reliefs.

4. The improved rotor of claim 2 wherein an end shaft fitting is attached to the end turn support and means connect the can to the end shaft fitting.

5. In a rotor of the type having a core subassembly having opposed ends, an outer peripheral surface over which a cylindrical can can be closely fit and a rotational axis, the improvement comprising:

at least one relief in the outer surface of the core subassembly defining a cutting path,

said cutting path configured so that with the can cut completely therethrough along the path, at least a portion of the can can be separated from the core subassembly without deforming the can portion;

said relief permitting cutting of the can completely therethrough over the at least one relief without damaging the core subassembly.