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Press plate for tightening the metal sheets of a stator core of an electric machine

A technology for stator iron core and motor fastening, which can be used in electrical components, electromechanical devices, electric components, etc., and can solve problems such as five major stresses on the pressure plate

Active Publication Date: 2011-11-16
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This structure allows a large pre-compression force to be applied to the sheet metal pack 3 so that they are well fastened in all states; however, this also induces very high stresses in the pressure plate 5

Method used

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  • Press plate for tightening the metal sheets of a stator core of an electric machine
  • Press plate for tightening the metal sheets of a stator core of an electric machine
  • Press plate for tightening the metal sheets of a stator core of an electric machine

Examples

Experimental program
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Embodiment Construction

[0020] refer to Figure 2-4 , shows the pressure plate 5 for fastening the sheet metal 2 of the stator core.

[0021] In the following the same reference numerals are used for similar components already indicated.

[0022] The pressure plate 5 comprises an annular member 16 having a plurality of holes 17 provided at its side wall 11 .

[0023] The wall 10 opposite the wall 11 is tapered; preferably, the angle of taper α between the tapered side wall 10 and an axis 18 perpendicular to the longitudinal axis 19 of the annular member 16 is less than 2°.

[0024] The hole 17 has a (circumferentially) elongated concave top portion 20 and a cylindrical concave bottom portion 21 extending from a flat top 22 of the elongated concave top portion 20 .

[0025] Specifically, the elongated concave top portion 20 has a major axis 24 tangential to a circumference 25 having a center on the longitudinal axis 19 of the annular member 16 . This makes the virtual uniform stress line substantia...

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PUM

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Abstract

A press plate (5) for tightening the metal sheets (2) of a stator core of an electric machine has an annular element (16) with a plurality of holes (17) provided at a side wall (11) thereof. The holes (17) have an elongated recessed top portion (20) and a cylindrical recessed bottom portion (21) extending from the ceiling (22) of the elongated recessed top portion (20).

Description

technical field [0001] The invention relates to a pressure plate for fastening metal sheets of a stator core of an electric machine. Specifically, the present invention relates to a stator core of a rotating electric machine such as a generator. Background technique [0002] refer to figure 1 A rotating electrical machine such as a generator includes a stator core 1 having a ring shape; a rotor (not shown) is accommodated in the stator core 1 . [0003] The stator core 1 is made of a plurality of metal sheets 2 grouped into packs 3 ; each pack 3 is separated from an adjacent pack by spacers (not shown) to define stator cooling channels 4 . [0004] In order to keep all the sheet metal packs 3 together, pressure plates 5 are provided at the two opposite stator core ends to fix and press the metal sheet packs 3 together. [0005] In order to connect the pressure plate 5 to the sheet metal pack 3, key bars 6 are welded (under tensile load) to the sheet metal 2; Enter seat 8...

Claims

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Application Information

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IPC IPC(8): H02K1/18
CPCH02K3/505H02K1/16H02K1/185
Inventor L·施塔希拉J·M·卡尼茨基D·黑迪格尔L·埃克特
Owner GENERAL ELECTRIC TECH GMBH