JPS59106843A - Canned motor - Google Patents

Abstract

PURPOSE:To prevent the deterioration of insulators of a stator by providing a plurality of a drain slots larger than the thickness of a can for allowing the end face of the can to axially communicated with the outer end face of a frame at the opposite 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 opposite load side of the frame 5 is formed in a shape bent toward the central direction in L-shaped section, a through hole 5a is formed, and a rotational shaft 13 is rotatably supported via a bearing 6. The end of the hole 5a is screwed at 8a between a blocking plug 8 and an O-ring 7. Three slots 5f are formed in outer diameter larger than the thickness of the can 4 at an equal interval substantially on the same circumference to the central diameter of the can 4. Coolant cools the can 4 through the flowing slot 9h of the load side bracket 9 by the rotation of a runner 17. When this coolant is leaded from between the can 4 and the frame 5, it is exhausted from the slots 5f into the atmosphere. In this manner, the deterioration of the insulators for the stator can be prevented.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a can motor having a frame body formed by a molding member for molding a stator and a thin cylindrical can joined to the inner peripheral surface of the stator. - This is related to improvements in torque.

[Prior art]

A conventional cant motor of this type will be explained with reference to FIG. In the figure, 1 is a stator that is wound around a stator core 2 and 2 is a stator winding 3, and 4 is a thin-walled cylinder that is connected to the inner peripheral surface of the stator core 2. 5 is a molded frame made of resin, for example, a molded frame body made of resin, 5
a is a through hole formed on the anti-load side of this frame 5, 5bl
A large diameter portion 5C formed on the outer end side of the through hole 5a.
5d is a threaded part formed in the middle part of the through hole 5a, 5d is a fitting part formed on the inner peripheral surface of the load side end of the frame 5, and 5e is
6 is a fitting portion formed on the inner peripheral side of the load side end of the frame body 5;
1. A co-bearing on the opposite load side fitted into the through hole 5a, 7. An O-ring 6L formed of an elastic body fitted into the large diameter portion 5I+1, 8. A first water seal member 8. (When the 7 part 8a is attached to the l1111 eagle part 5C, (c7 run part 8b presses the first water seal member 7 and the through hole 5a
υ1 air plug that watertightly closes the
d, the fitting part 9b is fitted into the fitting part 5e, and one end part 9c abuts the end of the fitting part 5d; So)・
A through hole 9e is formed in the center of the first hole 9e.
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 through hole formed in the boss portion 9d. Circumferential surface 9g
When fitted, the inner peripheral surface and circumferential surface 9g of the can 4
An O-ring formed of an elastic body that presses against the shoulder of the L
11 is a load side bearing fitted into the through hole 9e, 12 is a rotor core that pairs with the stator core 2, and 13 is on the inner peripheral surface of the rotor core 12. The fitted rotor shaft is rotatably supported by a pair of co-bearings 6 and 11, and one end protrudes from the outer end surface of the load-side bladder 9.

In I4, the fitting part 14a is the outer diameter surface 9a of the load side bracket 9.
Formed adjacent to 17 I: Fitting portion 9 h Ic O! I
It is connected to the load side end of the frame body 5 through the load side bracket 9 (t: pump casing of the circulation pump, 14b , +4c is Otsu's pump casing 14)? Provided with t suction port and discharge "1τ approximately the same axis line"
2, and is substantially orthogonal to the axis of the rotor shaft 13. 14d and 14e are suction passages and discharge passages that communicate with the suction port 14b and the discharge port 14c, respectively, J4f is an opening that communicates the suction passage +4d of B and the discharge passage 14e, and 149+ is connected to the outside of the load side roughness 41 and 9. A filter blade 11 chamber is formed by the end face and the discharge passage 14a of the pump gauging 14, 16 is a thin cylindrical mouth fitting fitted to the inner peripheral surface of the opening 14f, and 17 is a rotor shaft via an insert I fitting 18. An impeller molded from resin is fitted onto one end of the impeller 13, and the outer circumferential surface 17a of the one end faces the inner circumferential surface of the base 16 with a gap therebetween, and is adapted to rotate within the impeller chamber 149. There is. 17bl is the suction side of the impeller 17, and 17c is the discharge side of the impeller 17. In addition, suction port 1
4b (one end thereof is immersed in water in a water tank (not shown), for example; the other end of a suction pipe (not shown) is watertightly connected to the discharge port 14c, and a pipe connected to the water tank is connected to the discharge port 14c). One end of the discharge pipe is connected to the other end of the discharge pipe in a watertight manner.

(None shown). Next, we will explain the operation of something configured like B. When the Canto Motor device switch is turned on, the rotor core 12, rotor shaft 13, and impeller 17 rotate together. When the impeller 17 rotates, the water in the water tank flows through the suction pipe → suction bottom +4b → suction passage 14d → open bottom part 14f → suction side 17b → leaf side J7C → discharge passage +4a
→ Leaf outlet 14C → Discharge pipe → Piping → Circulate like a water tank. On the other hand, a part of the circulating water circulates around the inner circumference of the can 4 through the through hole 9h and circulates through the pair of coaxial bearings 6.11. A conventional cant motor of this type has the following structure. In particular, since the end of the can 4 on the opposite side of the load is sealed in the axial direction by the frame 5, the circulating fluid inside the can 4 is sealed. penetrates the interface between the inner circumferential surface of the anti-load side of the can 4 and the molded part of the frame 5 (7 and penetrates to the outer circumference of the can 4, causing insulation deterioration of the stator winding 3. However, there was a drawback that the life of the cant motor was significantly shortened to 11 it.

[Summary of the invention]

This invention was made in an attempt to solve the problem mentioned above, and is directed to the axial direction of the plurality of sides that are larger than the wall thickness of the can that communicates the non-load side end of the can and the non-load side outer end surface of the frame body. It is characterized by a cane with a single-stage hole.

[Embodiments of the invention]

FIG. 2 shows an embodiment of the present invention. In the figure, 5f is a cane liquid hole consisting of three circular grooves provided at equal intervals on the circumference approximately the same as the center diameter of the can 4 on the anti-load side of the frame 5; The end portion communicates with the outer end surface of the frame 5 on the anti-load side, and the wall thickness of the can 5 is also formed to have a considerably large diameter. The rest of the structure is the same as the conventional cant motor of type Otsu, so the explanation will be omitted.

With this configuration, if there is a small smell,
If the circulating fluid in the can permeates the interface between the anti-load inner peripheral surface of the can 4 and the molded part of the frame 5, the IA liquid hole 5'
is discharged into the outside air. The other operations are the same as those of the conventional cant mall, so the explanation will be omitted.

In addition, in this embodiment, the pump casing 1 of the circulation pump
4 is M fitted to the frame 5 via the load side bracket 9 tl,
One in which circulation 1N circulates inside the can 4 through a through hole 9) 1 provided in the load side bracket 9. Of course, the load side bracket 9 may not have the through hole 9h and the liquid may be filled in the inner circumference of the can 4.Also, in the embodiment B, the drain hole 5f may be , we have explained the case where 3 are provided, but for example, 2
It is also possible to provide one or four.

〔Effect of the invention〕

B's invention (as explained above, 1-cant motor 1 is equipped with a frame body formed from a molding material for molding a stator and a thin cylindrical can bonded to the inner peripheral surface of B's stator). , it is provided in the axial direction on the anti-load side of the frame, and the gray color 1 of the anti-load side end face of the can and the frame is
The can has a plurality of drainage holes that are larger than the wall thickness J of the can that communicates with the side to end surface. There is no deterioration of the insulation of the wire, and the quality is superior.It is effective in providing a long-life can motor.In addition, when molding the can, the end surface on the opposite side of the can is The electric current that matches the inner end face of the drain hole (1) also has the effect of ensuring recan positioning.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional canned type electric pump device, and FIG. 2 is a sectional view showing a fourth embodiment of the invention. In the figure, 1 is a stator, 4 is a can, 511 is a frame body, 5fl is a drain hole, 9 is a load side bracket 11.1° is a second water seal member,
13 is the rotor shaft. In addition, the same reference numerals in the figures indicate the same or corresponding parts. Agent: Makoto Ayano

Claims (1)

[Scope of Claims] A stator, a thin cylindrical can joined to the inner cylindrical surface of the stator of B, a frame formed by a molding material for molding this can and the stator, and a frame of the frame of B. A load-side bracket that is connected to one end surface iζ and rotatably supports one end side of the rotor shaft on its inner peripheral surface, and an outer periphery of the load-side bracket that faces the inner peripheral surface of one end side of the can and the stiff inner peripheral surface. A water seal member is provided with a water seal member that is pressed into contact with the surface (ζ), and is provided in the axial direction on the anti-load side of the frame, and the end face of the other end of the can and the end face of the frame on the anti-load side. A canto mold characterized in that it is provided with drain holes on a plurality of sides that are larger than the wall thickness of the can and communicate with each other.