Device for installing a header cap on a water header of a stator coil

• US 5,423,473 A
• Filed: 05/09/1994
• Issued: 06/13/1995
• Est. Priority Date: 05/09/1994
• Status: Expired due to Term

• Current Assignee: Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Westinghouse Electric Company LLC (Brookfield Asset Management Incorporated)
• Inventors: Dailey, George F., O'Leary, Michael T.
• Primary Examiner(s): Cuda, Irene
• Application Number:
  US08/239,491
• Time in Patent Office: 400 Days
• Field of Search: 228/44.3, 228/212, 29/890.052, 29/732
• US Class Current: 228/44.3
• CPC Class Codes: B23K 20/023 Thermo-compression bonding
• CPC Class Codes: H02K 15/0093 Manufacturing or repairing cooling fluid boxes, i.e. terminals of fluid cooled windings ensuring both electrical and fluid connection
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence
• CPC Class Codes: Y10T 29/4935 Heat exchanger or boiler making
• CPC Class Codes: Y10T 29/49389 Header or manifold making
• CPC Class Codes: Y10T 29/53143 Motor or generator

Abstract

A header cap and the mating surface of a water header are placed in abutting relationship with a seal for forming a layered, contiguous connection. A pressure device is attached in operative association with the header cap for operatively applying a pressure to the header cap. A spring which is received by the pressure device is compressed for applying a constant and unidirectional pressure to the pressure device which, in turn, transmits the constant and unidirectional pressure to the header cap. The connection is finally heated for brazing the header cap and water header together and for forming a seal.

Claims

1. A system for forming a seal between a header cap and a water header both positioned on a stator coil comprising:

(a) a spring operatively associated with the header cap for generating a generally constant and unidirectional pressure;

(b) pressure means in abutting contact with the header cap generally at a point directly over the centroid of the water header and cooperatively receiving said spring for transmitting the constant and unidirectional pressure of said spring to the header cap; and

(c) brazing means for brazing the header cap to the water header.

2. The system as in claim 1, wherein said pressure means includes a plate having a first stud projecting from the plate and in abutting contact with the header cap at the point directly over the centroid of the water header for applying the pressure to the header cap.

3. The system as in claim 2, wherein said spring includes a plurality of springs all in abutting contact with the plate for applying a generally constant and unidirectional pressure to the header cap.

4. The system as in claim 3 further comprising a tightener in contact with the spring for adjusting the compression on the spring.

5. The system as in claim 4, wherein said plate further includes a second stud projecting from the plate and in abutting contact with a nozzle of the header cap for assisting in maintaining the constant and unidirectional pressure of said plurality of springs.