JPS5851750A - Underwater molded motor - Google Patents

Abstract

PURPOSE:To improve the dimensional accuracy of an underwater molded motor by molding the periphery of a coil end with unsaturated polyester resin and covering the outer periphery of a stator core with glass and unsaturated polyester resin, thereby eliminating the damage to the coil. CONSTITUTION:The outer periphery and the side of a stator core 2, to which a stainless steel can 3 is inserted into the inner periphery and the periphery of a stator coil end 5 are molded with resin molding member 4 made of unsaturated polyester resin, and the outer periphery of the member 4 is covered with an inner layer sheath 61 made of glass and a metal sheath 62 made of unsaturated polyester resin. In this manner, since the resin can be molded at low pressure and temperature, a damage of a coil can be eliminated, and the damage of the sheath 61 due to external force can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a molded underwater model used in wells and the like. An embodiment of the present invention will be described below.

In FIG. 1, reference numeral 1 denotes a stator consisting of a stator core 2 and a stator coil, and a thin stainless steel can 3 is inserted into the inner periphery of the stator core 2. As shown in FIG.

4 is a resin mold member made of unsaturated polyester resin that surrounds the outer periphery and sides of the stator core 2 and the coil end 5 of the stator coil; 61 and 62 are first and second resin mold members that cover the outer periphery of the resin mold member 4; The outer cover 2 and 7 are screw metal.

Reference numeral 8 denotes a trochanter, 9 a rotor shaft, and 10 a bracket, which supports the rotor shaft 9 through a bearing 11. 12 is a bolt that is tightened.

The first (inner) jacket 61 is made of glass, and the second (outer) jacket 62 is made of thermoplastic or other resin.

The resin mold member 4 is formed by pouring unsaturated polyester into the inner sheath 61 with the stator l concentrically assembled therein, and then the outer sheath 62 is formed.

As described above, in this invention, since the resin mold member for molding at least the periphery of the coil end is made of unsaturated polyester resin, low-pressure, low-temperature molding is possible, eliminating damage to the coil, and reducing shrinkage. In addition to improving dimensional accuracy due to its high quality, the glass inner layer is fitted to the outside of the resin molded member.
It is possible to prevent the penetration of outside water, and this inner layer is inexpensive and has the effect of not rusting.Furthermore, since the outer layer is made of resin and is provided on the outside of the inner layer, it can withstand external forces. This has the effect of preventing damage to the inner layer and outer covering due to excessive heat and improving the appearance.

[Brief explanation of drawings]

The figure is a sectional view of a main part of an embodiment of the present invention. In the figure, 1 is a stator, 2 is a stator core, 8 is a can, 4 is a resin mold member, 5 is a coil end,
61 and 62 are outer covers, 7 is a screw, 8 is a rotor, 9 is a rotor shaft, 10 is a bracket), 11 is a bearing, and 12 is a tightening bolt.

Claims (1)

[Claims] In the case where the periphery of the coil end protruding to the side of the stator core is molded with a resin mold member, and the outer ring J of the stator core is covered with a two-layer outer cover, the resin mold member is made of unsaturated polyester resin. This is a molded underwater model with an inner sheath made of glass and an outer sheath made of unsaturated polyester resin.