JPH051968Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an insulating structure for a coil connection part of a rotating machine.

[Conventional technology]

Figures 2 and 3 show the conventional insulation structure of the coil connection part. In the figures, 5 is the conductor of the upper coil of the rotating machine coil, 6 is the conductor of the lower coil, and 7 is the conductor of both of these coils. A connecting piece that connects conductors.
3 and 4 are the insulation coatings of the conductors 5 and 6, respectively, and 9 and 1
0 is a coil end drawn out from the core 11. 1 is an insulating cap attached to the connecting portion of the conductors 5 and 6; 2 is a resin cast inside the cap 1; and 8 is a resin that has been hardened to a predetermined thickness on the bottom of the cap 1 before resin casting. At the bottom.

In this type of cap, an insulating cap 1 is installed around the connection part, and a resin 2 containing an inorganic filler is cast into the cap to prevent the ground potential through the space of the connection part and the potential with the adjacent coil. It has the function of insulating against the ground potential of the connection part due to dew condensation and dust adhesion. On the other hand, this insulating structure also has the function of increasing the mechanical rigidity of the connection part.

[Problem that the invention attempts to solve]

By the way, with the conventional structure as described above, there is no problem if the coil ends 9 and 10 are immediately pulled out from the core 11, but the eighth
If it is pulled out diagonally as shown in the figure,
It is necessary to further bend the connecting part at the tip from the coil ends 9 and 10 and combine it with the insulating cap 1. If the bending at the tip of the coil end is omitted and a square cap is used, the insulating coating of the lower coil The overlap of the casting resin was hidden by the cap, making it difficult to see, resulting in the problem of adding too much or not enough casting resin. In addition, with a square cap, the tip of the cap touches the lower coil end,
However, there was a problem that the overlap could not be taken.

This idea was made to solve the above problems, and the purpose was to create an insulating structure that could be cast as is even if the coil end was pulled out diagonally, and that would allow sufficient casting. There is.

[Means for solving problems]

The insulating structure according to this invention consists of a tube made of thin insulating material, the top surface of which is cut diagonally, and a bottom portion formed in advance on the bottom surface.The coil connection part is inserted through the top opening of the insulating cap, and the coil connection part is inserted into the above insulating cap using resin. It is cast.

[Effect]

With the insulating structure according to this invention, even when the coil end is pulled out diagonally, the insulating cap can be tilted and combined with the connection part. In this case, since the top surface of the cap is cut diagonally,
It is easy to check the overlap between the casting resin and the insulation coating of the lower coil, and a perfect insulation structure can be obtained.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. 21 is an insulating cap made by cutting a tube with a square or rectangular horizontal cross section vertically at the bottom and obliquely at the top, and 23 is a bottom formed by pre-curing a part of casting resin to a predetermined thickness. It is. 27 is an upper coil conductor, 28 is a lower coil conductor, and 29 is a connecting piece that connects these two conductors. 30 is an upper coil end, 25 is an upper coil insulation coating that overlaps with the side of the insulation cap 21, 31 is a lower coil end, and 26 is a lower coil insulation coating that overlaps with the side of the insulation cap 21. 22 is a resin cast into the insulating cap 21, and 24 is its upper surface. 32 is a rotating machine core.

In the above structure, coil end 3
0 and 31 are pulled out diagonally from the core 32, if the upper surface of the insulating cap 21 is cut diagonally according to the inclination, the cap 21 can be easily inserted into the cap 21 so that the connection part can be inserted into the cap 21 without any force. Even if the molded resin 22 is tilted, the resin 22 will not spill out, and the connecting portion including the insulation coatings 25 and 26 can be completely covered with the resin 22, thereby completing the insulation structure.

[Effect of idea]

As described above, according to this invention, when the coil end is pulled out diagonally with respect to the core, the upper surface of the insulating cap is cut diagonally, so when casting, the insulation of the bottom coil is removed. It is easy to check the overlap between the coating and the casting resin, and by adding too much casting resin, a complete insulation structure can be obtained at the joint.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of this invention.
FIG. 2 and FIG. 3 are both side sectional views showing the insulation structure of a conventional coil connection portion. In the figure, 21 is an insulating cap, 22 is a cast resin,
23 is the bottom, 25 and 26 are coil insulation coatings, 2
7 and 28 are coil conductors, and 29 is a connecting piece.

Claims (1)

[Scope of utility model registration request] The cap is made of a tube made of thin insulating material, the top surface of which is cut diagonally, and a bottom portion is previously formed on the bottom surface of the insulating cap.The coil connection portion is inserted through the top opening of the cap, and resin is cast into the insulating cap. Insulation structure of coil connection part.