Method for mounting stator core on generator assembly using the same

Patent metadata

Field	Value
Publication number	US-9812910-B2
Application number	US-201514592553-A
Country	US
Kind code	B2
Filing date	Jan 8, 2015
Priority date	Jan 17, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

Provided is a method for mounting a stator core on a generator, the generator having key bars and spring bars disposed between the key bars and a frame body, the method including pre-laminating stator core sheets to form a stator core bundle in a given unit; conveying the stator core bundle laminated in the given unit; and mounting the stator core bundle on the inner peripheral surface of the frame body.

First claim

What is claimed is:

1. A method for mounting a stator core on a generator, the generator having key bars and spring bars disposed between the key bars and a frame body, the method comprising:
pre-laminating stator core sheets to form a stator core bundle in a given unit; and
conveying the stator core bundle laminated in the given unit to mount the stator core bundle on the inner peripheral surface of the frame body.

2. The method according to claim 1 , wherein the stator core bundle is prelaminated at the outside the frame body.

3. The method according to claim 2 , wherein the stator core bundle has a shape of a donut, and the donut-shaped stator core bundle is conveyed and mounted on an inner peripheral surface of the frame body.

4. The method according to claim 1 , wherein the conveying the stator core bundle to mount the stator core bundle having a donut shape comprises fitting key bar grooves formed on the stator core to dove tails formed on the key bars when the stator core bundle is vertically descended to an interior of the frame body and mounted on an inner peripheral surface of the frame body.

5. The method according to claim 1 , further comprising:
mounting the key bars on the spring bars pre-built on the frame body; and
adjusting a relative distance between the key bars and the spring bars to adjust the alignment of the key bars.

6. The method according to claim 5 , wherein the adjusting the relative distance comprises mounting at least one or more first fixing jigs on the space between one side of the lower portion of each key bar and one side of the lower portion of one side spring bar of the spring bars on which the key bar is disposed, so as to adjust the alignment of the lower sides of the key bars.

7. The method according to claim 6 , wherein the adjusting the relative distance further comprises mounting at least one or more second fixing jigs on the space between one side of an upper portion of each key bar and one side of the upper portion of one side spring bar of the spring bars on which the key bar is disposed, so as to adjust the alignment of upper sides of the key bars.

8. The method according to claim 7 , wherein the adjusting the relative distance further comprises mounting fixing wedges on gaps between a top end of each key bar and top end portions of the spring bars on which the key bar is disposed, so as to fix the alignment of the upper sides of the key bars adjusted by means of the second fixing jigs.

9. The method according to claim 4 , further comprising laminating the stator core sheets at the outside of the frame body to form a donut-shaped stator core bundle, before mounting the donut-shaped stator core bundle.

10. The method according to claim 9 , wherein in the forming the donut-shaped stator core bundle, fan-shaped stator core sheets are connected in a circumferential direction to form a plurality of donut-shaped stator core sheets, and the donut-shaped stator core sheets are laminated to form a stator core lamination structure,
wherein in the state where stator core lamination structures are laminated on top of each other, spacing plates are mounted between neighboring stator core lamination structures to provide space in which a cooling fluid moves from the inner peripheral side of the stator core toward an outer peripheral side of the stator core.

11. The method according to claim 10 , wherein each spacing plate comprises a plurality of spacing beams mounted circumferentially in given intervals to form cooling passages in the space therebetween.

12. The method according to claim 11 , wherein the stator core bundle in which the spacing plates are disposed comprises clamping grooves formed in given intervals on an outer peripheral surface thereof so as to fit clamping jigs of a conveyor thereto, and the spacing beams in which outer ends are located on the positions where the clamping grooves are formed have the outer ends shorter than the outer ends of the neighboring spacing beams, thus preventing the interference with the clamping jigs of the conveyor.

Assignees

• Doosan Heavy Ind & Construction Co Ltd

Inventors

• Lee Sang Man
• Oh Se Wook
• Kwak Mooseok

Classifications

• H02K15/02

  of stator or rotor bodies · CPC title

• H02K1/20 Primary

  with channels or ducts for flow of cooling medium · CPC title

• H02K1/185

  to outer stators · CPC title

• H02K15/028

  Fastening stator or rotor bodies to casings, supports, shafts or hubs · CPC title

• Y10T29/49009

  Dynamoelectric machine · CPC title