SU964869A1 - Connection assembly of rods of winding of electric machine liquid-cooled stator - Google Patents

Description

The invention relates to electrical engineering, in particular, to the construction of the connection of winding rods with a liquid-cooled stator of an electric machine, for example a turbo-generator.

The known structure of the connection node of the winding rods with liquid cooling, the stator of the electric machine is made in the form of a tip, in which hollow and solid conductors are fixed. The tip is made with nodes for electrical and hydraulic connection of the rods 1.

However, since the electric and hydraulic connection of the rod is coupled in one massive tip, during repair (soldering) of the electric connection, violation of the soldering of the hydraulic connection is possible.

In addition, an individual water supply is provided for each tip, which leads to an increase in the number of water supply hoses.

Closest to the invention is a node connecting the winding rods with a liquid-cooling stator of an electric machine, in particular a turbo-generator, containing

the ends of adjacent recesses, consisting of: elementary alternating hollow and solid conductors, lugs, one of which is designed for electrical and the other for the hydraulic connection of rods 2.

The disadvantage of this design is that the mechanical connection between the hydraulic tips

10 and the electrical connection is provided only by a package of elementary conductors of the rod, in connection with which the possibility of damage to these conductors and disturbance is not excluded.

15 hydraulic density of the rod head. At the same time, due to the rigidity of the package of conductors, it is difficult to fit and assemble the rod hydraulic connection unit.

20

The purpose of the invention is to increase reliability and manufacturability.

This goal is achieved by the fact that the connection node of the liquid-cooled stator studs of the stator 25 of the electric machine is equipped with two brackets, each of which is made in the form of two angled shelves, one of which is attached to the lug for electrical connection, and the other for hydraulic connection of rods, the shelf connected to the tip for hydraulic connection of rods has a recess in which hollow conductors made with bends are placed, in the form of a computer Satori, raspolozhvnnyh in the area of arms.

The tip for the hydraulic connection of the rods is made of two tube plates placed in one plane, in each of which the hollow conductors of one rod are fixed, and a common two-chamber cap of the splicer, coupled with the said tube plates;

Fig; 1 shows a part of the connection unit for winding rods with a liquid-cooled stator of an electric machine, cross section; ON fi 2 - the same, type in the plan; in fig. 3 is a section A-A in FIG. one"

The cores 1 and 2 of the stator windings with liquid cooling consist of elementary conductors, for example, solid 3 and hollow 4 conductors. Inside the latter a cooling liquid flows. At the ends of the rods 1 and 2, the tips of the electric 5 and hydraulic b connections are set aside. These nodes are fixed one in relation to the other with brackets 7. The elementary conductors 4 in the area between the tips of the electric and hydraulic connections, i.e. in the installation zone of the brackets 7, are made with bends Ш Ш in the form of compensators 8.

The coupling of the brackets 7 with the tip of the electrical connection 5 is made in a plane parallel to the longitudinal axis of the rod in this area, and the coupling of the brackets 7 with the tip of the hydraulic connection b is made in the plane perpendicular to the axis of the rod. The part of the bracket 7 that mates with the hydraulic connection tip is made with a recess 9, in which the elementary conductors 4 are located.

The brackets 7 are made of a non-magnetic material with a higher electrical resistivity than that of copper, for example, of non-magnetic steel,

The tip of the hydraulic connection 6 is made of two tube plates 10 and a common two-chamber lid fitting 11.

The tube plates 10 are placed in one plane, for which, if necessary, a gasket is installed between the bracket and the tube plate. Hollow conductors 4 of one of the rods are hollowed into each of the tube plates 10. Cover-fitting 11 sopr wife

with tube plates 10 through independent sealing gaskets 12 closed around the perimeter, embedded in the grooves 13, made in tube plates Y. With a different design, the grooves 13 can be turned out not in the tube plates 10, but in the lid-fitting 11. Brackets 7, tube boards 10 and caps-fittings 11 are bolted 14 with washers 15.

The soldering of the elementary conductors 4 with the tube plate Yu is performed from the side of the end hollow conductors 4, for which a groove 16 is provided. At the same time, the hollow conductors 4 protrude above the surface of the tube plate 10, which facilitates the control of the permeability, for example, IBO repair time; The soldering of conductors 4 with the tube plate 10 can be additionally performed from the side of the tube plate, which is relative to the tip of the electrical connection 5.

The tip of the electrical connection 5 is made of two massive holders 17 with shanks 18, which are twice as thin as the holders themselves. The shanks 18 are located together in a plane, parallel to the axis of the rod. Thus, in a plane perpendicular to this axis, the section of the tip of the electrical connection .5 has the shape of a rectangle. The electrical contact at the interface of the shanks 18 is provided by the force generated by the bolts 19 with the nuts 20, which are secured by the washers 21. To improve the electrical contact, the connection of the shanks 18 to each other can be made permanent, for example, soldered.

Elementary conductors 3 and 4 are assembled in a package placed in the inner window 22 of the casing 17 and secured, for example, by soldering.

Claims (2)

When assembling the stator windings, the rods 1 and 2 are stacked so that the shafts 18 mate with each other in the head, and the clips 17 solder to the conductors 3 and 4 in advance, during the manufacture of the rods. Also, the spares with the conductors 4 and the tube plates 10 are prearranged. Due to the flexibility of the conductors 4, in the place where the compensators 8 are made, the tube plates 10 can be moved in the direction along the axis of the rod in this zone so as to set them in the same plane. This ensures, after the installation of the caps-fittings 11, that there are no undesirable mechanical stresses on the sealing gaskets 12. When brackets 7 are installed, two tube plates 10 are kept in the same plane, for which, if necessary, gaskets are installed between the tube plates and the bracket. When the turbogenerator is in operation, due to the fact that the lugs of the electric 5 and hydraulic b connections are fixed one with respect to each other by brackets 7 / in the solid conductors in the area between these nodes there are no mechanical stresses caused by the vibration of the winding and the water lines to it. Mechanical stresses caused by temperature changes are also minimized due to the performance of bending of the conductors in the form of compensators 8 in this zone. This significantly increases the reliability and durability of the structure. Improvement of technological gi is achieved due to the fact that firstly, an independent soldering of elementary conductors with the clip It and the tube plate 10 is performed, it is solicited for the race of tube plates 10c with wings 11, secondly, due to the combination of two tube plates with one fitting, the number of water pipes. The repair performance is increased due to the fact that the soldering of the conductors 4 can be performed on both sides of the tube plate 10, the replacement of the gaskets 12, etc., becomes simpler and more reliable. Technical and economic efficiency of the proposed device is that, compared with the known. The reliability of the electric machine, its repairability and manufacturability is increased by means of constructions. Claim 1. A junction of rods of a liquid-cooled stator rotor of an electric machine, in particular a turbogenerator, containing at the ends of adjacent rods, consists of elementary alternating hollow and solid conductors, the tips of which one is designed for electrical and the other for hydraulic connection of rods characterized in that, in order to improve reliability and manufacturability, it is equipped with two brackets, each of which is made in the form of two shelves arranged by Lod, one of which is connected to the tip for electrical connection, and the other to the tip for hydraulically connecting the rods, and the shelf connected to the tip for hydraulically connecting the rods has a recess in which hollow conductors are placed, made with bends in the form of compensators / paps in the zone brackets. 2. The assembly according to claim 1, is different from the fact that the tip for the hydraulic connection of the rods is made of wires placed in the same plane of the truss boards, in which the hollow conductors of the same rod are fixed, and the common two-chamber curl 1 ki-1 1tusera, conjugated with ayi-tube tubes. Sources of information and information are taken into account during the examination. 1. USSR author's certificate 276230, class H 02 K 9/19, 1963. 2. Patent of France 1 1467668, Clo H 02 K, 1964. // fi.