SU442550A1 - Tip for outputting windings of electrical machines - Google Patents

Description

one

The invention relates to the field of electrical engineering and can be used in electric machines with direct cooling of current-carrying parts. Ferrules for the hydraulic and electrical connection of the windings of electric machines are known, comprising a chamber connected to the socket with the ends of the hollow conductors arranged therein for circulating a cooling agent.

A disadvantage of the known tip designs is that they allow the cooling substance in each winding rod to pass in one direction, in connection with which the rod

: has uneven heating along the length: the core has more heating on the output side of the cooling medium than on the input side. This will negatively affect the allowable power and reliability.

. electric machines ..

The proposed tip does not have the indicated drawbacks and differs from the well-known one in that in order to increase reliability by providing counter-circulation of a coolant in each rod, the conductors are combined into groups, each of which is connected to one of the two. chambers formed in the choke, by partitioning it. This makes it possible to increase the reliability and the power of an electric machine with direct cooling of the windings.

FIG. 1 shows a tip with a coaxial arrangement of cavities; FIG. 2 shows a cross-section of the tip at the point where the conductors are introduced into the chambers; in fig. Figure 3 shows as an example a tip with a number of spaced cavities; FIG. 4 shows a cross-section of said tip.

Hollow conductors of the winding rod are fixed in the housing 1 of the tip in two groups arranged coaxially: one group 2, another group 3. Fitting 4. has coaxially located cavities 5 and 6. These cavities 6 are spaced between groups of conductors sealed from each other by a gasket 7, body fastening and the nozzle end is produced by a cap nut 8.

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Cavity fittings 5 and 6 are made by separating fitting 4 with a coaxial septum 9. In the assembled tip, a group of hollow conductors of winding 2 communicate with the cavity of fitting 6, and a group of conductors 3 with the cavity of fitting 5. The cavities of fitting 5 and 6 are connected with hoses to the supply or drain manifold electric machine, depending on the direction of flow of the binding liquid received by 1 along the groups of hollow conductors of the winding. When coolant is supplied to the cavity of fitting 6, it is drained through cavity 5, and the flow of coolant in hollow conductors, winding groups 2 and 3, is directed oppositely.

It is also possible to design the tip with a number of spaced cavities, with the hollow conductors of the winding being fixed in the housing of the tip 10 to two groups: one group 11, the other 12. The union 13 has the cavities 14 and 15 alongside, the cavities between the groups The conductors are sealed from each other by a gasket 16. The fastening of the tip body and the fitting is produced with a cap nut 17. The cavities of fitting 14 and 15 are made by separating fitting 13 with a partition 18. In the assembled tip there is a group of hollow conductors 11 sec. Communicates with the cavity of the fitting 15, and the group of conductors 12 - with the cavity 14, Cavities 14 and 15 are connected by hoses with the supply or drain manifold of the electric machine depending on the received direction of flow of the coolant through the groups of hollow conductors of the winding. When coolant is supplied to the cavity of fitting 15, it merges through cavity 14, and the flow: the cooling fluid in the hollow conductors of winding groups 11 and 12 is directed oppositely. It is also possible to perform baffles with a different configuration, for example, of zigzag shape,

The proposed design allows the passage of coolant in two groups of hollow conductors of each rod in different directions (counter).

To provide multi-path coolant circulation in each rod, the tip is made with several at least two fitting cavities that are sealed relative to each other and articulated with these cavities of groups of hollow core conductors. .

The proposed design of the tip is reliable in operation and allows counter-circulation of the coolant in each stator winding, so that the heating of the rod along the length will be uniform and the absolute temperature of the most heated part of the rod will be less than with the flow of cooling fluid in each rod in one direction . This makes it possible to increase the power of the electric machine and increase the reliability of its operation.

Subject invention

A terminal for outputting the windings of electric racks containing a fitting, a box, an adapter, with ends of hollow conductors fixed therein for circulating a cooling agent, characterized in that, in order to increase the operational reliability of the machine by providing counter circulation of the cooling agent, the conductors are combined into groups, each of which communicates with; one of the chambers formed in the choke through partitioning.

2

15

FIG.