JPS59106842A - Canned motor - Google Patents

Abstract

PURPOSE:To prevent the deterioration of insulators by providing a drain slot for introducing water leaked from a water sealing member out of a motor body between a bracket for engaging a stator with a can at the load side of a molded frame and the frame. CONSTITUTION:A stator core 2, a stator winding 3 and a can 4 are molded to integrally mold a frame 5. The frame 5 is engaged between a load side bracket 9 and a water sealing member 10, a plurality of draining slots 5f are formed on the opposed surface to the bracket 9 and allowed to communicate with the radially outer peripheral surface. The bracket 9 rotatably supports a shaft 13 via a bearing 11. A runner 17 is engaged with the shaft 13, water is circulated by rotation, and a water stream is partly passed through the hole 9h of the bracket 9 to cool a rotor 12 and the can 4. When this coolant is leaked from the member 10, it is exhausted out of the motor body from the slots 5f. In this manner, the deterioration of the insulators for the stator 1 can be prevented.

Description

[Detailed description of the invention] [Technical details of the invention] The invention of B is a frame body formed by a molding material for molding a stator and a thin cylindrical can joined to the inner peripheral surface of the stator of B. The present invention relates to an improvement of a cant motor having a cant motor.

[Prior art]

This will be explained according to FIG. 1, which is a conventional example of a cant motor. In the figure, 1 is a stator core 2 and a stator winding wound around this stator core 2! a3; 4, a thin cylindrical can joined to the inner peripheral surface of the stator core 2; 5; 5a is a through hole formed on the anti-load side of the frame body 5, 5b is a large diameter portion formed on the outer end side of the through hole 5a, and 5C is a through hole 5.
5d is a fitting portion formed on the inner peripheral surface of the load side end of the frame 5; 5e is a fitting portion formed on the inner peripheral surface of the load side end of the frame 5; 6 is a through hole 5a.
7 is a first water sealing member made of a Ql ring formed by an elastic body fitted into the large diameter portion 5b; 8 is a first water seal member having a male threaded portion 8a connected to the female threaded portion 5c; While being screwed, the flange portion 8b presses the first water seal member 7 17.
an exhaust plug that watertightly closes the through hole 5a; 9 is an outer diameter surface 9a;
is loosely fitted into the fitting portion 5d, and the fitting portion 9b is loosely fitted into the fitting portion 5d.
(9d is this load side bracket) which is fitted into e and whose one end surface 9c abuts the end surface of the fitting part 5d.
・B through hole 9e is formed in the center of the inner circumference of 9.
9f and 9g are circumferential surfaces of different diameters formed continuously on the outer peripheral surface of the boss portion 9d, 9h is a through hole provided in the axial direction of the boss portion 9d, and 10 is a circular hole. Peripheral surface 9g
A second water seal member 11 is made of an O-ring formed of an elastic body and is fitted into the through hole 9e and is pressed against the shoulders of the inner circumferential surface and the circumferential surface 9g of the can 4. A load side bearing 121, a rotor core paired with the stator core 2, and 13 a rotor shaft fitted on the inner circumferential surface of the rotor core 12, which is rotatable in a pair of bearings 6 and 11. It is supported by the load side bracket, and one end thereof protrudes from the outer end surface of the load side bracket 9.

]4, the fitting part 14a is the load side bracket, and the outer diameter surface 9 of the
It is watertightly fitted into the fitting part 9h formed adjacent to a through the third water sealing member 15 made of an O-ring, and
A pump casing of the circulation pump, 14b, which is connected to the load side end of the frame 5 via the load side bracket 9;
Reference numeral 14c denotes a suction port and a discharge port respectively provided in the pump casing 14, which are disposed on the same axis and are substantially orthogonal to the axis of the rotor shaft 13. 14d, 14
14f is an opening that communicates with the suction passage 14d and the discharge passage 14e; 149 is a load-side bladder;
Outer end surface of 1 and 9 and discharge port of pump casing 14 $14
an impeller chamber formed by e, 16 is an opening 14;
A thin cylindrical base 17 is fitted on the inner peripheral surface of f, and 17 is an impeller molded from resin that is fitted to one end of the rotor shaft 13 via an insert fitting 18, with one end on the outer peripheral surface 17a.
It faces the inner peripheral surface of the cap 16 with a gap in between, and rotates within the impeller chamber 149. 17b
17c is the suction side of the impeller 7, and 17c is the discharge side of the impeller 17. Note that the other end of a suction pipe (not shown), one end of which is immersed in water in a water tank (not shown), is connected to the suction port J4b in a watertight manner, and the discharge port 14c is connected to a water tank (C-connected). One end of the discharge pipe is connected to the other end of the discharge pipe, and the other end of the discharge pipe is not watertightly connected to the pipe (both not shown).

Next, we will explain the operation of something configured like B. When the device switch of the canto motor 1 is turned on, the rotor core 12, the rotor shaft 13, and the impeller 17 rotate together. When the impeller 17 rotates, the water in the water tank flows through the suction pipe -> suction tube 14b - suction passage 14d.

→Opening part 14↑→Suction side 17b→Discharge side 17c→Discharge passage #14e→Discharge hole 14c→Discharge pipe→Piping→Water tank. On the other hand, some of these circulating water flows through the through hole 9.
It circulates around the inner circumference of the can 4 via a pair of coaxial bearings 6.
Lubricate 11.

Since the conventional cant motor of type B is constructed as described above, the circulating water in the can 4 may leak from the joint of the second water seal member 10 for some reason and cause damage to the fitting part 5e and the frame. When the leaked water reaches the space between the opposing surfaces of the body 5 and the load side bladder 9, it accumulates in the space. Second, the accumulated water permeates into the inside of the mold material that forms the frame 5, and eventually the insulation of the stator winding 3 deteriorates, significantly shortening the life of the motor and making it uneconomical. There was a big drawback.

[Summary of the invention]

This invention was made in J. No. 1 in order to solve such drawbacks, and one end of the can is communicated with the radial outer peripheral surface of the frame at the end surface of the frame body 5 facing the load-side bladder and the side wall 9. It is characterized by having a drainage groove.

[Embodiments of the invention]

FIG. 2 shows an embodiment of the present invention. In FIG. 0, 5f is a load-side bladder of the frame 5, and a plurality of drainage liquids formed on the surface facing the connection with the socket 9 in a direction that allows drainage. In the ditch
The load-side end surface of the can 4 and the radially outer circumferential surface of the frame 5 are communicated with each other. The rest of the structure is the same as the conventional cant mall, so the explanation will be omitted.

In this structure, the circulating water in the can 4 leaks from the joint of the second water seal member 10 for some reason and connects to the fitting part 5e and the frame 5 to the negative ipsilateral bracket l-9. When the circulating water reaches the space between the opposing surfaces, it is discharged from the outer circumferential surface of the frame 5 through the plurality of drain grooves 5f without accumulating in the space. The other operations are the same as those of the conventional cant motor of this type, so the explanation will be omitted. In this embodiment, the pump casing 14 of the circulation pump is coupled to the frame body 5 made of a molding material for molding the stator and the can, but this is not limited to the embodiment of B. Of course. In addition, in this embodiment, a through hole 9h is provided in the load side bracket 9, and the circulating water circulated by the circulation pump flows into the electric motor through the through hole 9h and is discharged to the outside of the electric motor. Of course, the present invention is not limited to this, and the liquid sealed in the can 4 may be watertightly sealed between the frame body and the load-side bracket.

〔Effect of the invention〕

As explained above, this invention includes a frame body molded with a molding material for molding a stator and a can, and a frame body that is connected to one end surface of the frame body and has one end side of a rotor shaft rotatably attached to an inner circumferential surface of the frame body. In a case where a water sealing member is press-welded between the supporting load-side bracket and the outer circumferential surface of the load-side bracket (which faces the inner circumferential surface of one end of the can), the load-side bracket of the frame body is connected to Since the structure is such that at least one drainage groove is formed on the surface to communicate between one end of the can and the radial outer circumferential surface of the frame, it is possible that the sealing liquid or circulating water may come into contact with the water sealing member for some reason. Even if leakage occurs from the outside of the frame toward the outer circumference of the frame, it is immediately discharged from the drainage groove to the outside air, so sealing liquid or circulating water does not permeate into the molding material used to form the frame. Cantomotor with excellent quality and long life without deterioration of winding insulation.
This has the effect of allowing parties to provide dollars. In addition, since the drain groove is formed on the end face of the frame, it is possible to insert the disassembly tool into the drain groove when disassembling the load side bracket, making the disassembly work easier.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional canned electric pump device, and FIG. 2 is a sectional view showing an embodiment of the present invention. In the figure,
1 is a stator, 4 is a can, 5 is a frame, 5f is a drain groove, 9
9 is a load side bracket, 9h is a through hole, 10 is a second water seal member, and 13 is a rotor shaft. Note that the same reference numerals in the drawings indicate corresponding parts. Agent Makoto Kuzuno -21:

Claims (1)

[Claims] A stator, a thin cylindrical can joined to the inner circumferential surface of this stator, a frame molded with a molding material for molding the can and the stator, and a frame joined to one end surface of this frame. a load-side bracket formed on the inner circumferential side together with the rotor and rotatably supporting one end of the rotor shaft on the inner circumferential surface of the boss portion; and a load-side bracket that is fitted on the outer circumferential surface of the boss portion and one end of the can In the water sealing member that is in pressure contact with the side inner circumferential surface, at least one connecting surface of the load-side bracket of the frame body communicates one end of the can with the radial circumferential surface of the frame body. A canto motor characterized in that one drainage groove is formed.