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Retention assembly for stator bar using shim with stator wedge and related method

A technology for holding components and stator slots, which is used in the use/manufacture of slot locking devices, electric components, windings, etc., and can solve problems such as damage and increased cost

Active Publication Date: 2016-12-21
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The re-wedging process can also cause damage to other components of the generator, adding to the cost

Method used

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  • Retention assembly for stator bar using shim with stator wedge and related method
  • Retention assembly for stator bar using shim with stator wedge and related method
  • Retention assembly for stator bar using shim with stator wedge and related method

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Embodiment Construction

[0077] As indicated above, the present disclosure provides a retaining assembly for retaining a plurality of components in a stator slot of an electric machine. The present disclosure also provides an electric machine including a retainer assembly, and a related method of installing a shim.

[0078] Figure 4 is a section view, and Figure 5 is a detailed cross-sectional view of a portion of the electric machine 100 and retainer assembly 102 in accordance with an embodiment of the invention. Electric machine 100 may comprise any now known or later developed electric machine, such as a motor or generator. like Figure 4 As shown in , electric machine 100 may include a stator 140 including a stator core 142 having stator slots 144 . As will be appreciated, the stator core 142 actually includes a plurality of radially extending stator slots 144 (not shown here, see figure 1 ), each of which is arranged to house a plurality of elements 104 therein. Stator slots 144 are defin...

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PUM

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Abstract

A retention assembly (102) for retaining a plurality of elements (104) in a stator slot (144) of an electric machine (100) is provided. The retention assembly (102) may include a stator wedge (164) fixedly positioned in a dovetail (166) in the stator slot (144) to retain the plurality of elements (104); a top ripple spring (168) between the plurality of elements (104) and the stator wedge (164); and at least one shim (110) positioned between the stator wedge (164) and a load bearing surface (165) of the dovetail (166). A method may include compressing the stator wedge (164) in the stator slot (144) from a first position thereof relative to the dovetail (166) of the stator slot (144), the compressing creating a gap (184B) between the stator wedge (164) and the dovetail (166). A shim (110) may be inserted in the gap (184B); the compressing released such that the shim (110) retains the stator wedge (164) in a second position that is more compressed relative to the plurality of elements (104) in the stator slot (144) compared to the first position.

Description

technical field [0001] The present disclosure relates generally to electric machine stators, and more particularly to retaining assemblies using shims with respect to stator wedges of electric machines and related methods. Background technique [0002] Electric machines, such as motors and generators, include stator windings (also known as stator coils or stator bars) that are routinely inspected during planned outages to verify their operation. figure 1 is an end perspective view of a conventional motor 10 . The electric machine 10 includes a stator core 16 having a plurality of stator slots 12 to receive stator bars to generate electromagnetic flux. The stator slots 12 are configured to receive stator bars to be positioned in the stator slots defined around the inner circumference of the stator core 16 . The stator bar may be formed from a plurality of flat bar conductors coupled together to form a predetermined winding path. In one approach, the stator bars are made fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/487H02K15/00
CPCH02K3/487H02K15/0018H02K1/16H02K15/024
Inventor E.S.巴斯柯克A.D.布朗J.J.格兰特C.M.赫伯特B.A.曼库索M.R.马丁J.M.鲍威尔斯
Owner GENERAL ELECTRIC TECH GMBH
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