JPS5914337A - Binding method for coil end of underwater motor - Google Patents

Abstract

PURPOSE:To eliminate the production of a slack of the binding part of a coil end by binding the coil end with a binding material which has a strength of long lifetime. CONSTITUTION:The head part of a coil end 4 which is projected from a stator core 2 is bound by a binding material 5 to enhance the rigidity so as to prevent the coil end 4 and a lead 7 from fluctuating due to the turning flow or flow of water, liquid 9 produced due to the rotation of a rotor 8. In this case, the used binding material selects nonfibrous member. Since the nonfibrous binding material has longer lifetime than a fibrous binding material, the slack of the binding part of the coil end can hardly occur.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to binding for stopping movement of winding ends of a submersible electric motor.

Generally, in a rotating electric machine, the part of the stator winding in the stator core groove is sufficiently protected and fixed by the groove, but the part that protrudes from both ends of the stator core, that is, the winding end, is supported by a fixed object. It must be supported in some way. For example, based on the developed stator winding diagram shown in FIG. 1 according to the conventional example, the stator core shown in FIG. 2 according to the conventional example, and the vertical cross-sectional view of the end of the stator winding,
is a stator frame, the stator core 2 is laminated on the inner periphery of the stator frame l, and the winding end 4 protruding from the end surface of the laminated core presser plate 3 is made of a plurality of wire sets. It is necessary to bundle the strands together and to support the winding end 4 itself. In this example, 5 locations shown in the figure are bound with binding material.

That is, at the same time as each wire set is tied, three adjacent winding end portions 4 are folded against each other to increase rigidity. Another method is to remove the outer periphery of each winding end 4 (provide a coil support JJ6, tie each winding end 4 to this coil support 6 using a binding material, and then A method of bundling and supporting each winding end 4 was also adopted. Furthermore, a method has also been adopted in which the coil support element 6 is fixed to a fixed object. In any case, the members used for this type of binding are desired to have high strength and long life, since the rotating electric machine itself cannot generally be inspected internally on a daily basis.

In particular, if the area where the binding material is used is underwater or other liquid, and the water or liquid is flowing, a temporary force from the water or liquid is applied to the binding material.

In submersible motors, the ends of the windings are placed in flowing water or liquid, so in order to prevent damage due to movement of the ends of the windings and leads, conventionally nylon fibers or glass fibers have been used as the material for the above-mentioned binding. A cord or dezo was used.

However, during long-term use, the knots or the entire binding layer become loose due to damage and swelling due to the flow resistance of water and liquids, and the original purpose of binding each strand and supporting the ends of each winding is lost. It had the disadvantage of not being able to do anything.

The object of this invention is to eliminate the above-mentioned drawbacks and to bind the ends of the windings using a binding material with long life and strength, so that the bound parts of the ends of the windings do not become loose.
To achieve this objective, the materials were bound using a non-fibrous material as the binding material.

Embodiments of the present invention will be described below based on the drawings. 1st
The figure is a developed view of a stator winding according to a conventional example, and Fig. 2 is a vertical cross-sectional view of the stator core and the end of the stator winding of a conventional example.As shown in the figure, the winding protrudes from the stator core 2. In order to prevent the end portion 4 and the lead portion 7 from swinging due to the swirling flow (arrow) or flow of water or liquid 9 generated by the rotation of the rotor 8, the head portion of the winding end portion 4 is wrapped in a binding material 5. It binds together and increases rigidity. A non-fibrous material was selected as the binding material used in this case. That is, as shown in the perspective view of FIG. 3 according to an embodiment of the present invention, a thin insulated wire 1O is used, in which a core wire (copper or other conductive metal) 10a is coated with an insulation coating (vinyl chloride, polyethylene, rubber, etc.) 10b. there was. In addition, a plurality of core wires 11a (of the same material as in FIG. 3) as shown in the perspective view of FIG. 4 according to an embodiment of the present invention are lined up and insulated (the material is the same as in FIG. 3). 11
A flat cable 11 coated with b may also be used. All of them are commercially available products and can be easily obtained. Experience and experimental results using this material have confirmed that it has much longer lifespan than fiber-based binding systems.

[Brief explanation of drawings]

FIG. 1 is a developed view of a stator winding according to a conventional example, FIG. 2 is a vertical cross-sectional view of an end portion of a stator core and stator winding according to a conventional example, and FIG. 3 is a winding according to an embodiment of the present invention. FIG. 4 is a perspective view of an insulated wire as a binding material used in the wire end binding method, and FIG. 4 is a perspective view of a flat cable as a binding material according to another embodiment of the present invention. 4. Winding end, 5. Binding material, 10... Insulated wire, 1
1...Flat cable. -21・

Claims (1)

[Claims] 1) The ends of the stator windings are bound using a binding material, so that the stator windings and leads protruding from the stator core are caused by the swirling flow generated as the rotor rotates. 1. A method for tying winding ends of a submersible motor which is designed to prevent rocking, characterized in that a non-fibrous tying material is used as the tying material. 2. A winding end binding method for an underwater motor according to claim 1, characterized in that a vinyl chloride insulated wire, a polyethylene insulated wire, a rubber insulated wire, etc. is used as the binding material. How to tie wire ends. 3) In the method for tying the ends of windings of an underwater electric motor as described in claim 1, a vinyl chloride insulated flat couple, a polyethylene insulated flat cable, a rubber insulated flat cable, etc. are used as the tying material. Features: A method for tying the winding ends of underwater motors.