JP3125800B2 - Rotating machine stator core - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core structure of a rotary electric machine in which a foil temperature measuring element is embedded, and more particularly to a core structure suitable for use in a stator of a large-capacity turbine generator.

[0002]

2. Description of the Related Art In order to measure the temperature of a stator core of a rotary machine during operation, as shown in FIG. The wire is drawn out to the outer diameter side of the stator core along the attached thin iron plate, connected to the lead wire, and fixed to the lead wire stopper. The distance between the lead wire detent support and the stator core cannot be made large due to restrictions. When connecting the foil temperature measuring element outlet wire and the lead wire, the foil temperature measuring element outlet wire in the stator core is firmly fixed by pressing after lamination of the core,
Unable to move, the foil thermometer outlet at the outer diameter position of the stator core may be repeatedly subjected to excessive force and break.

[0003]

In the conventional method, in order to prevent disconnection at the lead-out position of the lead-out element of the foil temperature measuring element, the distance between the outer diameter of the stator core and the support for stopping the movement of the lead wire is increased. Accordingly, it is necessary to prevent the excessive force from being repeatedly applied to the outlet of the foil temperature measuring element at the outer diameter of the stator during the connection work. As a result, the support for stopping the movement of the lead wire is provided on the outer diameter side, and there is a problem that the entire stator becomes large. In addition, as a stator core,
No. 53 can be mentioned.

It is an object of the present invention to provide a structure for preventing breakage of a lead wire at a lead-out position of a lead wire for measuring a temperature of a foil.

[0005]

The present invention achieves the above object.
To formed, only attached to the outer diameter side thin plates of thin iron plate foil temperature measuring element is attached, to form a notch in the sheet,
To lead the opening outgoing line from the notch, on the outer diameter side of the circumferential direction of the thin iron plate position not attach the foil temperature measuring element, a notch
It is characterized by attaching a thin plate that is not formed .

With this configuration, it is possible to prevent disconnection of the foil temperature measuring element outlet wire on the stator outer diameter side.

[0007]

[Action] When the thin steel plates to form a notch attached to the outer diameter side thin plate pressing after lamination, radial force distribution in the notch of the push after pressurization is as shown in FIG. 2, Hakuhaka temperature as the element opening out lines go to the inner peripheral side from the notch, it will be gentle force is applied, contributes to preventing disconnection of the foil temperature measuring element opening out line.

[0008] In addition, by stacking a thin iron plate on which a thin plate having no notch formed on the outer diameter side is mounted in the circumferential direction at the same position as that on which the foil temperature measuring element is mounted, unevenness in the circumferential direction at the time of stacking is obtained. Can be eliminated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. As shown in FIG. 6, the stator core 1 for a rotating electric machine is formed by laminating a fan-shaped thin iron plate 1a in a cylindrical shape, pressing the stator core holding plate 3 on the end duct 4, and pressing in the axial direction. In order to measure the temperature rise of the stator core during operation, a foil temperature measuring element 7 is mounted inside the stator core. FIG. 6 shows a part of an axial section of a stator core for a rotating machine. FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6, and a support 6 is attached to a fuser iterator 5 attached to the outer diameter side of the end duct 4 by welding.

FIG. 1 shows a mounting position of a foil temperature measuring element. The thin plates 1b and 1c are fixed to the thin iron plate 1a by spot welding or an adhesive, and a thin iron core having a notch formed on the outer diameter side is laminated, and a lead wire of the foil temperature measuring element is drawn from the notch. As shown in FIG. 3, a thin iron plate 1
A thin plate 1d is fixed to a by spot welding or an adhesive, and a thin iron plate without a notch is formed and laminated. As a result, the distance between the support 6 and the fixing position of the foil temperature measuring element lead wire can be increased, and the repetitive force applied to the fixing position of the foil temperature measuring element lead wire during the work of connecting the lead wire to the outside can be reduced. FIG. 2 shows the pressure change in the notch portion in the radial direction when the thin iron plates are pressed after being laminated in a cylindrical shape. As shown in FIG. 2, the pressure in the notch increases toward the inner peripheral side, and there is no abrupt pressure change, and the pressure generated by the repeated bending at the time of connecting the lead wire and the lead wire of the temperature measuring element gradually decreases. Within the range that changes. This is also effective in preventing disconnection of the foil temperature measuring element outlet lead-out portion.

[0011]

According to the present invention, the pressure change at the outlet of the lead-out wire of the foil temperature measuring element can be made gradual, and disconnection of the lead-out wire at the outer diameter position of the stator core can be prevented. It is possible to provide a stator core including a highly reliable temperature measuring element.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of a thin iron plate at a position where a foil temperature measuring element lead wire is drawn according to the present invention.

FIG. 2 is a pressure distribution diagram of a lead wire of a foil temperature measuring element when pressed after lamination according to the present invention.

FIG. 3 is an explanatory view of a structure of a thin iron plate at a position where a foil temperature measuring element is not mounted on the same circumference as a foil temperature measuring element mounting position according to the present invention.

FIG. 4 is an explanatory view of a conventional thin iron core structure at a mounting position of a foil temperature measuring element.

FIG. 5 is a pressure distribution diagram of a foil temperature measuring element outlet line when pressed after lamination by a conventional method.

FIG. 6 is a longitudinal sectional view showing the periphery of the core end of the rotating electric machine stator.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

[Explanation of symbols]

1: stator core, 1a: thin iron plate, 1b, 1c, 1d: thin plate.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toshio Isaka 3-2-2, Sachimachi, Hitachi-shi, Ibaraki Within Hitachi Engineering Services Co., Ltd. (72) Takashi Shibata 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. Co., Ltd. Hitachi, Ltd. In the Hitachi Plant (56) References Japanese Utility Model 58-179873 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 11/00 H02K 1/18

Claims (1)

(57) [Claims] 1. A within a thin iron plate laminated in a cylindrical shape having a plurality of slots for armature coil accommodated in the peripheral side, fitted with Hakuhaka temperature sensor between the thin steel plate, out the mouth of the foil temperature measurement element in the stator core of a rotary electric machine to draw a line on the outside, the foil temperature measuring element is taken
Attach a thin plate to the outer diameter side of the thin steel plate
A notch is formed by a plate, and the lead wire is drawn from the notch.
Of the thin iron plate in the circumferential direction
A stator core for a rotating electric machine, wherein a thin plate having no notch is mounted on an outer diameter side .