JPS5849065A - Manufacture of stator end cooling facing for rotary electric machine - Google Patents

Abstract

PURPOSE:To obtain a cooling facing of a stator end without leakage of water which can be readily manufactured by pressing and superposing by an explosion pressing method a metal plate having grooves and a metal plate having no groove, thereby forming a coolant passage between both plates. CONSTITUTION:A sector metal plate 6A formed with grooves 11A to become coolant passage on the surface and a sector metal plate 6B having no groove are pressed and superposed by an explosion pressing method to form a segment 6C. After a plurality of the segments 6C are coupled in an annular shape, a fading large diameter part 6D is formed by a bending work. Similarly, a fading small diameter part 6H is formed of a sector metal plate 6E formed with grooves 11B capable of being connected to the grooves 11A of the plate 6A and a sector metal plate 6F having no groove. The part 6D and the part 6H are welded with a connecting piece 6J having a connecting passage 11C and a cover 6K, and are formed at the end of the prescribed stator for a rotary electric machine.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a stator end cooling facing for a rotating electrical machine.

As rotating electric machines become larger, generators in which component parts are assembled in high density require a cooling device that effectively removes heat generated by losses in each part. This problem is particularly important in the case of a gas pumped stator that is compatible with a water-cooled rotor or a superconducting rotor. Generally, rotating electric machines have thin plate iron cores laminated in the axial direction with flanges attached to the end faces and tightened with bolts. In order to prevent overheating caused by the generation of eddy current in the flange on the end face of the stator core due to the magnetic flux of the rotor end coil, the 7 langes are protected with a cooling facing made of a non-magnetic and highly conductive material. In order to prevent this cooling facing from overheating, a water cooling structure is used, but conventionally I'
A method was proposed in which the i7 Acing was made redundant and cooling water was allowed to flow between the pipes, and a method in which cooling pipes were arranged on the surface of the facing.

Cooling facings must not leak water; the former is difficult to manufacture due to the duplication of water, and the latter is difficult to manufacture because the cooling pipes are embedded in the facing, and there is also a risk of damage during stator coil assembly. There was a drawback that it was easy to attach.

An object of the present invention is to provide a method for manufacturing a stator end cooling facing for a rotating electrical machine that is easy to manufacture and does not leak water.

In order to achieve this object, the present invention uses a metal plate provided with grooves to serve as cooling water passages and a metal plate without grooves. A feature is that by forming a cooling facing of an integral structure with water passages, manufacturing is facilitated and water leakage from the overlapping surfaces is prevented.

Hereinafter, the present invention will be explained based on illustrated embodiments. 1st
The figure is a longitudinal sectional side view of the main parts of a rotating electric machine, and the stator core 1 is made up of thin plate iron cores stacked in the axial direction, with flanges 2 attached to the end faces thereof and tightened with ports 3. A stator coil 4 is provided on the inner circumference side of the stator core 1, and the outer circumference of the stator core 1 is supported by a stator frame 5. A cooling facing 6 is attached to the surface of the seven langes 2 facing the stator coil 4, and this cooling facing 6 is supported by the stator frame 5 and connected to the water header 7 and the drainage header 8 with insulating hoses 9. A cooling water passage 11 connected via 10 is provided. When viewed from the front, the cooling facing 6 has an annular shape as shown in FIG. 2, and is divided into a plurality of blocks of 11 cooling water passages, each of which is provided with a water supply port 12 and a drain port 13.

FIGS. 3(a) to 3(i) show the manufacturing process of the cooling facing 6 according to the umbrella invention. (a) to (d) &j In the manufacturing process of the large diameter part, a fan-shaped metal plate 6A with grooves 11A forming the cooling water passages 11 formed on the surface and a fan-shaped metal plate 6B without grooves are crimped by explosive crimping method. Polymerize to form segment 6C. After several to more than ten segments 6C are joined together to form an annular shape, a bending operation is performed to obtain the facing large diameter portion 6D.

(e) to (h) In the manufacturing process of the l-j small diameter part, a fan-shaped metal plate 6E with a groove 11B formed therein for forming a cooling water passage 11 so as to connect the groove 11A to the surface thereof and a fan-shaped metal plate 6E without a groove are formed. A fan-shaped metal plate 6F is pressure-polymerized using an explosive pressure bonding method to produce a segment) 6G. And several to 1 of these segments 6G
After several pieces are combined to form an annular shape, a bending operation is performed to obtain the facing small diameter portion 6H. A connecting piece 6J having a communication path 11C connecting the large diameter portion 6D and the small diameter portion 6H obtained in this manner.
Using the cover 6K, align and weld together so that the cooling water passage 11 is formed, and then connect the water supply port 12 (drain port 13).
is provided to complete the cooling facing 6.

The cooling water passage 11 portion of the cooling facing 6 and the overlapping surfaces of the two plates 6A and 6E are traced as shown in the fourth cross-sectional view. Explosive crimping type crimping type has rippled joints that are highly watertight and have high bonding strength, so even if the pressure of cooling water is increased, there will be no water leakage.

As described above, according to the present invention, a metal plate with grooves and a metal plate without grooves are pressure bonded and polymerized by the explosive pressure bonding method to form a cooling facing of an integral structure having a cooling water passage between the drawing plates, so that manufacturing is easy. This can be done easily and without worrying about water leakage.

[Brief explanation of drawings]

The IR1 page is only for explaining one embodiment of the present invention.
Figure 1 is a vertical side view of the main parts of the rotating electrical machine, Figure 2 is a front view of the cooling facing, Figures 3 (a) to (i) are manufacturing process diagrams of the cooling facing, and Figure 4 is the cooling water passage of the cooling facing. FIG. 1... Stator core, 6... Cooling facing, 6A
. 6B, 6E, 6F...Metal plate, 11...Cooling water passage, No. 15! J ′JF2 Figure 1 Ki

Claims (1)

[Claims] 1. In the manufacturing method of a cooling facing that is attached to the end of a stator of a rotating electric machine to cool the stator end, a metal plate with grooves for cooling water passages and a metal plate without grooves are placed on the groove side. 1. A method for manufacturing a stator end cooling facing for a rotating electric machine, comprising: forming a cooling facing having an integral structure having cooling water passages by crimping and polymerizing a drawing board by an explosive crimping method so as to form a crimping surface.