JPS59213268A - Underwater molded motor - Google Patents

Abstract

PURPOSE:To improve the productivity of an underwater molded motor and to reduce the size and weight of the motor by integralling molding the motor with epoxy varnish of specific moisture permeability filled with glass flake filler having specific aspect ratio and epoxy resin having specific moisture permeability and thermal deformation temperature. CONSTITUTION:Low moisture permeability epoxy varnish having 0.1g/m<2>.24H or lower is previously impregnated, coated on a coil core and dried, glass flake filler having 60-80 of aspect ratio, added with glass flake to equivalent mixture of bisphenol A type liquid epoxy resin and liquid acid anhydride hardener methyltetrahydrophthalic anhydride as a hardener is filled, a stator transfer molded with epoxy molding material having 0.5g/m<2>.24H or lower of moisture permeability and 130 deg.C of higher of thermal deformation temperature is associated. In this manner, a stator can be readily molded, the productivity can be improved, and the size and weight can be reduced.

Description

[Detailed Description of the Invention] This invention relates to a molded submersible electric motor,
In particular, the present invention relates to a seven-wheeled submarine engine in which the stator portion is molded.

In 2011, with the aim of improving the productivity, characteristics, and functions of electrical equipment, transformers, current transformers, switches, capacitors, transistors, hand-shaped motors, etc. were produced using thermosetting molding phase materials. ing. For example, in a small electric motor, part or all of the stator core and coil may be integrally molded from unsaturated polyester, phenol, or epoxy resin. However, with regard to submersible motors, it has not been possible to obtain a perfect molded submersible motor for reasons such as reduced insulation life due to moisture permeability of plastic.

Therefore, this invention was made with attention to the above circumstances, and the stator part is completely molded, resulting in high productivity.
The purpose of this product is to provide a molded submersible electric motor that is small, lightweight, and inexpensive.

This invention will be explained below. As a result of intensive study on completely molding the stator section of an underwater electric motor, the inventors arrived at the idea that the molded underwater electric motor shown in Fig. 7 is appropriate12. It was confirmed that it has the following characteristics. In the structure shown in FIG. 1, a low moisture permeability coating 3 made of an epoxy resin mixed with a glass flake filler having an aspect ratio of 60 to g[theta] is applied to the core and coil core. This film 3 not only blocks water from entering from the outside, but also functions as a buffer layer for preventing silane 4 of the mold layer 7, which will be described below. 6 is a mold layer made of an epoxy resin molding cell, and the epoxy resin 11 molding phase material is a compound of bisphenol A type solid epoxy resin and novolac type epoxy resin, and the curing agent is diaminodiphenylmethane and phenol. (Tsuki) Use your fingers. In addition, as a filler, quartz powder, talc, clay, alumina, etc. are used. The slots in the core/mold layer are provided with a lining can S, and an airtight terminal A, an insert screw 7, etc. are integrally buried in the mold layer.

Thus, in this invention, the coil and core portion are omitted in advance.
l & / 7 + 1"・, After applying a low moisture permeability epoxy varnish of 21IH or less and drying, coat the entire stator part with 7+1".
Transfer molded with an epoxy molding material containing S~g03i3' parts of an inorganic filler, a moisture permeability of θS&/+u・21I−H or less, and a heat distortion temperature of 730U, L)J, ]−. It has a structure that incorporates a stake.

Next, one embodiment of the molded submersible electric motor of the present invention will be described in detail, including the manufacturing process. First, an epoxy resin filled with a glass flake filler having an aspect ratio of 40 to 500 is impregnated and applied to a coil and a core, and then dried and hardened in an electric furnace. In this case, the epoxy resin is a bisphenol A type liquid epoxy resin (for example, Epicoat G, 2g manufactured by Shell), and the curing agent is a liquid acid anhydride curing agent, methyltetrahydrophthalic anhydride (for example, H1, manufactured by Hitachi Chemical). , 2-00) to which 10 parts by weight of glass flakes are added is suitable. Furthermore, in order to improve the adhesion of the interface, an epoxysilane-based coupling agent is used.

The epoxy resin molding material that forms the main body of the mold is as follows:
Solid epoxy resin of bisphenol A type (e.g. Epicor manufactured by Shell Co., Ltd. 100'l, epoxy equivalent 9SO) and novolac epoxy (e.g. Aralgate xV/manufactured by Chinoku Co., Ltd.)
gg, epoxy equivalent/g! ), diaminodiphenylmethane (+,, J 1nA) as a hardening agent, phenol novolac inorganic filler and silica (filling amount is 'ts-go parts by weight) as a reinforcing phase, gas fiber (filling amount 5 to 75 parts by weight) and additives such as an internal mold release agent at various blending ratios to achieve a moisture permeability of 0.5 g/
7rj・, 2riH (in the case of /vm thickness), and a heat distortion temperature of /1l-7°C could be obtained.

The mold stake manufactured by transfer molding using the molding material obtained in this way was heated in water at a constant temperature (Figure 2 shows the test equipment in which the test was carried out. Immersion-Zero 1, /, ? is water flowing in from the water pipe /g, /S is the 4R+ water pipe.

In this device, the mold stator was heated to 10θ to 7.20° C. by applying electricity to the coil, and in this state, changes over time in the core water and the insulation resistance between the main coil and the sub coil were measured. The results are shown in No. J1. As can be seen from this figure, the core water content and the low l· of insulation resistance between the main coil and the sub-coil are not observed, and it can be seen that /2×10'IViΩ is maintained even after 5000 hours.

As described above, in this invention, the stator core, coil end portion, and slot portion are integrally molded with epoxy resin molding material, so the stator portion can be easily molded, productivity is high, and compact diesel oil can be used at low cost. It can be a molded submersible electric motor.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the mounting part of an embodiment of the present invention, and Fig. 2 is a front sectional view of the test equipment for testing the invention.
FIG. 3 shows an example of the test results. /...Core, λ...Coil, 3...Low moisture permeability epoxy coating, G...Epoxy mold layer, S...Can, Otsu...Airtight terminal, 7...Insert screw 7 inner Rihito Masu Oiwa
Male 1 Figure Horse 2 Figure Island 3 Figure Electronic 1i (hrsj Procedural amendment "Spontaneous" l if f'l (7) Manpower O 11 Nanasho
5g-ni 53za No. 2 Name of invention Molded submersible electric motor: 'r, 1lli 11? i・-・）-rudo representative piece 1 (1 person, part 4, substitute 1 person + 11 Column 4 for detailed explanation of the invention of Akimutsu) Contents of amendment (1) Detailed description page 2, line 2θ FXVJ changed to “ "XU," he corrected.

Claims (1)

[Claims] In a molded underwater TIL motor in which the stator core, coil end portion, and slot portion are integrally molded with a resin molding material, the core and the coil are inlaid with a glass flake filler having an aspect ratio of 60 to 60. Filled with a low moisture permeability epoxy varnish with a moisture permeability of 0.197 m・, 2<'H or less, and a moisture permeability mold A-g/rn'・, 2
4fH (/m thickness) or less f Heat deformation temperature force/ , ?
0' is characterized by comprising the resin molding material made of an epoxy resin or more;
Motive.