DEVICE FOR THE WEDGING OF COILS OF ROTORS OF ELECTRIC MACHINES

• US 3,739,212 A
• Filed: 10/04/1971
• Issued: 06/12/1973
• Est. Priority Date: 10/06/1970
• Status: Expired due to Term

• Current Assignee: Christian Lehuen, Joseph D.E. Vaulx, Robert Koelbel, Roger Gillet
• Original Assignee: Christian Lehuen, Joseph D.E. Vaulx, Robert Koelbel, Roger Gillet
• Inventors: Gillet, Roger, Koelbel, Robert, De Vaulx, Joseph, Lehuen, Christian
• Primary Examiner(s): Duggan, D. F.
• Application Number:
  US05/186,421
• Time in Patent Office: 617 Days
• Field of Search: 310/269,194,214,218
• US Class Current: 310/194
• CPC Class Codes: H02K 3/527 applicable to rotors only

Abstract

The invention relates to the wedging of coils on the rotors with salient poles of electric machines with wedges put between the coils. The wedges are kept in place through studs which connect them through ball-and-socket joints to attachment pieces resting under two adjacent coils. Such a wedging is especially useful in long machines wherein the rotor is subjected to extensive heating.

Claims

1. In a salient Pole dynamo electric machine, a device for wedging coils on the rotors, comprising wedges (4) placed between the coils (1);

attachment pieces (6) located beneath two adjacent coils;

studs (5) connecting the wedges (4) and the attachment pieces (6) to secure them together while exerting upon them radial stress toward the outside of the rotor. the improvement comprising a ball and socket joint (7) connecting the corresponding attachment piece (6) and the stud (5).

2. In the machine of claim 1, a second ball and socket joint (8) located between the attachment pieces (6) and the coils (1).

3. In the machine of claim 2, an intermediate support element (8'"'"''"'"') located between the coil (1) and the corresponding attachment piece (6), said intermediate element and said attachment piece, at their matching surfaces, being formed with said second ball and socket joint (8).