JPH023385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in underwater motors used in wells and the like. Conventional submersible motors have a structure called a can type as shown in FIG. A structure is known in which water (antifreeze) for lubricating the thrust bearing 16 is sealed in the can.

However, although this type of canned motor has good electrical insulation of the stator coil, it also has a collar 1 for sealing the ends of the frame 101 and the can 3.
02 is required, so the collar 102 and frame 1
It is necessary to machine the spigot fitting part of the 01 end and the spigot fitting part of the collar 102 and the brackets 12, 13, and it is also necessary to assemble these parts, which has the disadvantage of increasing manufacturing costs.

This invention was made to eliminate the above-mentioned drawbacks of the conventional products, and aims to reduce manufacturing costs and improve insulation performance.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An underwater motor according to an embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, 1 is 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. Reference numeral 4 denotes a resin mold member made of polyester resin or vinyl ester resin that surrounds the outer periphery and sides of the stator core 2 and the coil end 5 of the stator coil. Reference numeral 6 indicates a plurality of screws embedded in the resin mold member 4 for tightening brackets 12 and 13, which will be described later, and reference numeral 7 indicates a pin 71 to which the power supply cable 8 is detachably connected.
The terminal block is embedded in the resin mold member 4. A sealing material 72 is applied to the entire surface of the terminal block to prevent outside water from entering from around the terminal block 7. A rotor 9 includes a rotor shaft 10, a rotor core 11, and the like. Brackets 12 and 13 are fixed to the resin molded member 4 and support the rotor shaft 10 via sleeve bearings 14 and 15. 16 is a thrust bearing, and 17 is an internal pressure adjustment device. Note that an antifreeze solution such as propylene glycol is sealed inside the can 3.

In this invention, as mentioned above, the stator is molded around the stator with a resin molded member to prevent the intrusion of outside water, so the stator frame and collar of the conventional canned type are not required, and the machining of these is unnecessary. In addition to reducing manufacturing costs by eliminating the need for cables and assembly, the terminal block to which the power supply cable connector is connected is also integrally molded, which shortens the assembly process. Since the is coated with adhesive, it is possible to prevent the intrusion of outside water and improve insulation performance.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a canned submersible motor, Figs. 2 and 3 are related to an embodiment of the present invention, Fig. 2 is an overall sectional view, and Fig. 3 is an enlarged sectional view of a stator. be. Note that the same reference numerals in the figures indicate the same parts. 1 is the stator, 2 is the stator core, 3 is the can, 4
5 is a resin mold member, 5 is a coil end, 7 is a terminal block, 72 is an adhesive, and 8 is a power supply cable.

Claims (1)

[Claims] 1 A resin molded member 4 that covers the outer periphery and sides of the stator core 2 and the periphery of the coil end 5, and an external power supply cable 8 that is embedded in the resin molded member 4 with only the power supply side exposed and detachably supplied. An underwater motor characterized by comprising a terminal block 7 to be connected together, and a sealing material 72 applied to the entire surface of the power supply side of the terminal block 7.