JPS6130496B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead cable line for electrical machine windings.

Conventionally, after placing the winding coil in the core groove, attaching the outlet cable wire with a protective part made of glass fiber to the outer sheath and performing the full impregnation treatment, the treated resin is impregnated into the protective part made of glass fiber of the outlet cable wire. Ru. Then, the protective part after drying and hardening becomes hard and loses its flexibility, making it difficult to attach the lead cable wire to the terminal block, and sometimes making it impossible to attach it. In addition, the hardened protective portion may break, resulting in a decrease in insulation. Furthermore, the hardened lead cable wire is not flexible, so it cannot be strongly connected along the connection wire between the coils, and the vibration of the rotating electrical machine causes a resonance phenomenon and causes damage.

For this reason, a complete impregnation process is performed before connecting the winding coil and the lead cable wire, and the connection is performed before the resin hardens. In this case as well, since the lead portion of the winding coil is hardened, breakage occurs during the connection work. Furthermore, the connecting portion becomes longer in the axial direction, resulting in longer coil end dimensions. Furthermore, since the entire coil was impregnated except for the connecting parts, it was not possible to integrate the insulation of the entire winding coil, including the lead-out cable wire, and there were weak parts in the insulation.

The present invention eliminates these drawbacks, and aims to prevent the impregnated resin from penetrating into the protective portion formed by braiding fibers that serve as the outer sheath of the lead-out cable wire.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a lead-out portion of a winding coil housed in a core groove (not shown), and a lead-out cable wire 2 connected to lead-out portion 1 is covered with silicone rubber, and the surface of the silicone rubber coating is covered with glass fiber. It is covered with a first protection part 4 consisting of. Further, an insulating layer 3 is formed by winding mica tape at the connection portion between the outlet portion 1 of the winding coil and the outlet cable wire 2.
The glass fiber of the first protection part 4, which is the outermost covering of the outlet cable line 2 near this connection part, is removed. The sealing layer 5 is formed by winding a self-adhesive silicone tape or silicone rubber, for example, to a thickness equal to or greater than the thickness of the first protection part, or attaching it with an adhesive to the removed part of the first protection part. do.
Next, both the sealing layer 5 and the first protection part are covered with a tube-shaped second protection part made of a heat-shrinkable film material. Then, on the upper part of the sealing layer 5, a second protection part 6 is formed.
A rubber cap 8 is placed over the end of the second protection part 6 on the side opposite to the seal layer, and the opening of this cap 8 and the second protection part A self-adhesive silicone tape (not shown) is wrapped around the surface of 6. After that, when the surface of the second protection part is heated, for example, with a hair dryer, the second protection part 6 is brought into close contact with the first protection part 4 due to heat contraction of the second protection part 6 and the string 7, which are heat-shrinkable materials, and the string 7 is heated. The second protective portion 6 is sealed by the seal layer 5.

When the entire core housing the winding coil connecting the outlet cable wire 2 and the outlet part 1 having the seal structure configured in this manner is impregnated, the second protective part 6 is made of a film material, so the impregnation is performed from the outer peripheral surface. Resin does not enter the first protection part 4.
Further, since the vicinity of the end of the second protection part 6 on the side of the insulating layer 3 is also sealed by the string 7 and the seal layer 5, the impregnated resin does not enter the first protection part 4. (The anti-insulating layer of the second protection part 6 is sealed with the cap 8, so no intrusion will occur.) Therefore, the outlet cable wire 2 maintains its flexibility, making it easy to attach the outlet cable wire 2 to the terminal block. In addition to this, the fixation to the connecting wire between the coils is also strong, and there is no damage due to resonance. Further, since the lead cable wire 2 and the lead part 1 of the winding coil are flexible, there is no breakage and no deterioration in insulation, and the axial length of the connection part is shortened, resulting in a short coil end dimension.

Furthermore, since the entire lead-out cable wire 2 and the lead-out portion 1 are subjected to impregnation treatment after being connected, the winding coil including the lead-out cable wire 2 is integrated into an insulating structure, which improves insulation properties and improves reliability.

As described above, according to the present invention, by providing a sealing layer between the first protection part and the second protection part on the output cable line side near the connection part between the output part of the winding coil and the output cable line, the entire This has the effect of preventing the impregnated resin from entering the first protective part during the impregnation process.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of a lead cable line showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Exit part of winding coil, 2... Output cable wire, 3... Insulating layer, 4... First protection part, 5
... Seal layer, 6 ... Second protection part, 7 ... String, 8
...cap.

Claims (1)

[Claims] 1 Connect one end of the wire coil housed in the iron core groove to one side of the lead-out cable wire having a protective part made of braided fibers on the surface, and cover this entire connection part with an insulating layer,
The other side of the lead cable wire is covered with a cap and the entire core is completely impregnated in a microwave, and the first protection is made of braided fibers that cover the outer sheath of the lead cable wire on the side connected to the winding coil. A sealing layer made of a self-adhesive material is attached to the deleted portion of the first protective portion to a thickness equal to or greater than the thickness of the protective portion, and a heat-shrinkable sealing layer that covers the first protective portion and the sealing layer. A second protection part made of a flexible material and a string made of a heat shrinkable material were tied to the upper part of the seal layer from the outer peripheral surface of the second protection part and heated and dried to prevent the impregnated resin from entering the first protection part. A method for preventing resin intrusion into an outlet cable line, which is characterized by: