JPS59103537A - Canned motor - Google Patents

Abstract

PURPOSE:To prevent insulators of a canned motor from deteriorating by arranging water sealing members between the inner peripheral surface of the end of a frame molded with a stator and the outer peripheral surface of a can, and between the outer peripheral surface of the end of the can and a bracket. CONSTITUTION:A frame 1 is formed by molding a stator core 3, a stator winding 4 and a can 5 with a molding material. Water sealing members 18, 19 are respectively inserted between the outer peripheral surface of the end of the can 5 and the frame 1, and watertight O-rings 9, 12 are respectively inserted between the outer peripheral surfaces of brackets 6, 10 and the inner peripheral surface of the can 5. In this manner, the frame 1 is double-shielded from sealing liquid by the water sealing members to remarkably improve the deterioration of the insulators. Thus, it becomes not necessary to consider the water resistance of the molding material, and inexpensive molding material can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to the improvement of a canted motor used as a drive source for, for example, a canned type electric circulation pump device. .

[Prior art]

A conventional type of cant motor will be explained with reference to FIG. In the figure, ■ is a frame formed of iron casting, for example, 1a is a shoulder provided on the inner circumferential surface of the frame 10 on the anti-load side of B, and 1b is connected to the Y1 part 1a of B in an approximately perpendicular direction. 11 through holes that communicate with the IC (Maoto's 11 through holes 1)) and multiple through female screws carved at equal intervals on the circumference concentric with the IC (Maoto's 11 through holes 1), 1d
1e is a circumferential fitting portion formed on the inner circumferential surface of the load side end of the frame body 1; 1e is a pair of through holes provided at a predetermined location on the radial outer circumference of the frame body; 2 is the frame body; A stator consisting of a β1 stator core 3 fi attached to the inner circumference of the body J and a stator winding 4 wound around the stator core 3 B; A thin cylindrical can made of a threadless hook whose outer circumferential surface is joined, and reference numeral 6 denotes a plurality of cans each having a fitting portion 6a fitted into the through hole 1b and each screwed into a plurality of through female threads 1C. The bolts 7 and 7 rungs 6b are connected to the outer end surface of the cold body 1, and a hollow anti-load side bladder T1 is fitted with an anti-load side co-bearing 88 fitted on the inner peripheral surface. A female thread 6c is formed on the outer end of the inner circumferential surface along with the inner circumferential surface. 6d is a circumferential groove formed on the circumferential surface of one end of the anti-load side bracket 6;
9 is the circumference of Otsu)? The first water seal member is molded from synthetic rubber and is fitted on the can 5.
It is in watertight pressure contact with the inner circumferential surface of one end side. 1o is the fitting part 1
It is a hollow anti-load side bracket having an outer surface 10.1 fitted to d and a fitting part 10.1 consisting of an annular protrusion formed on one end side. The portion 11 is fitted. 10b is a circumferential groove formed on the outer circumferential surface of the load a1 rebracket 10 facing the inner circumferential surface on the other end side of the can 5;
Reference numeral 12 denotes a second water sealing member made of an O-ring molded from synthetic rubber that is fitted into the circumferential groove 10b, and is in watertight pressure contact with the inner circumferential surface on the other end side of the can 5. 13 is a rotor core paired with the stator core 3, and 14 is a rotor shaft fitted to the rotor core 13, which is rotatably supported by a pair of cylindrical bearings 8.11. 15 is an exhaust plug, female thread part 1.5
A is screwed onto the female thread 60, and the flané portion 15b is a synthetic rubber-molded O-ring.
It is in pressure contact with e in a watertight manner. Reference numeral 17 denotes a sealed liquid made of fresh water or the like, which is poured into the inner circumference of the can 5. Note that a bomb caning of the circulation pump is watertightly fitted into the fitting portion 10a via a fourth water seal member made of an O-ring molded from synthetic rubber, and the pump caning is connected to a load side bracket, It is screwed to the load side end of the frame l via 110 (not shown). Further, an impeller that rotates within the pump casing is fitted to one load-side end of the rotor shaft 14 (not shown).

Next, we will briefly explain the operation of a device configured as shown in FIG. When the operation switch of the canto motor is turned on, the rotor core 13, rotor shaft 14 and impeller rotate and the circulation pump device is driven. It is stirred by rotation and flows, cooling the inside of the electric motor and a pair of cylindrical bearings 8.11.
Perform lubrication. In the case of B, since the can 5 and the first and second water seal members 9 and 12 are provided, the enclosure 1y17 is prevented from coming to the stator 2 side. , but stator 2
The surrounding area contains moisture. Air is flowing in and it is enclosed
ri l 7) is low, the humidity around the stator 2 is included. However, the air condensed and caused insulation failure in the stator winding 4, which caused the stator winding 4 to burn out. As a countermeasure to this problem, a method of filling resin around the coil E'-1 of the stator winding 4 may be adopted, but this method has the drawbacks of poor productivity and high cost.

[Invention (,!λ required)]

[This invention] has not been attempted to overcome these drawbacks.The first method is to mold the stator with a mold, mold the frame body with a mold, and form a frame body with a pair of brackets connected to both ends of the frame body. j
・A pair of water seal members are installed 4i on the part facing the inner peripheral surface of the can.
In addition, the present invention is characterized in that another pair of water seal members are provided at opposing portions between the outer circumferential surface of both ends of the can and the inner circumferential surface of both ends of the frame.

[Embodiments of the invention]

FIG. 2 shows an embodiment of the present invention. In the figure, 1 is a mold for stator 2, for example, IJ (J in fat).
A frame body, 1F (, 1) is molded on the load-side inner circumferential portion of the frame body 1, and is a circumferential fitting part formed concentrically with the fitting part 1b. 1g is tlW joint 1
adjacent to b, the joint part 11) is formed concentrically and has a slightly small diameter; A'6 side 7 dents j10 (This is formed t: Circumferential fitting part towards the tip; Yki... J
It abuts against the - end side end surface of 5, but faces the inner end surface of the IK joint 1 with a gap therebetween. 181. t 11
>;In addition to the can 5, it should be fitted in the joint 1g (,:
ij Fl (, N; j surface and outer peripheral surface are watertightly pressed against the inner peripheral surface of the fitting part 1g; 1 + ring-shaped fifth water seal member; one is connected to the inner peripheral surface of the fitting part 1r; A ring-shaped sixth water mark member 20 is connected to the outer circumferential surface of one end of the can 5 and the distal end surface of the fitting part 10c in a watertight manner. When molding body 1, insert insert 1.
Multiple inserts with IJ markings 1. What are the metal objects 3 and 7 arranged at equal 7 intervals on a circumference concentric with the opening hole 1b? , V several ins-1 metal body 20
σr; At the same time, attach the anti-load side bracket 6 to the frame]
The inverse of f5:j Oi +;'+ :f:j tThis is the pol 1 of 111, plus, and other j. 11 of that song
``-^The construction is the conventional structure, do-seven-tor and studs, so I'll omit the explanation.

・In the structure similar to the second one, the joint between the first and second water sealing members 9.12 and the inner circumferential surface of the key 15, the L-liquiton 5] 7 (J 5th and 6th water - 1
', completely 1 by 1 member 18.19! Jl was stopped,
B and B in contact with the inner circumferential surface of the frame body 1 are prevented 11-. The other operations are the same as those of the conventional cant mole and stud, so the explanation will be omitted.

〔Effect of the invention〕

As explained above, this invention involves molding the stator into a frame body using a molding member, and a pair of brackets that are connected to both ends of the frame body and rotatably support the rotor shaft. A pair of water seal members are fitted into the outer circumferential surfaces facing the inner circumferential surface of the can in watertight contact with the inner circumferential surface of the can, and another pair of water seal members are fitted in water-tight pressure contact with the outer circumferential surfaces of both ends of the can. Since the sealing member is fitted to the inner circumferential surface of the frame with a staggered configuration, the frame can be
The insulation deterioration of the stator winding is significantly improved by the A-shaped molding member, and the water sealing effect of each pair of water fountain members completely prevents the enclosure i12 from coming into contact with the frame, so the molding material This has the advantage that there is no need to consider water permeability and water deterioration resistance, and it is possible to use inexpensive molding materials. In addition, since there is no need to consider the water deterioration resistance of the mold material, it is possible to use materials with good thermal conductivity for the parts, which also has the effect of suppressing and muffing the temperature rise of the electric motor.

[Brief explanation of drawings]

Figure 1 shows an example of a conventional cant mole 1i)j
The top view and FIG. 2 are cross-sectional views showing an embodiment of the invention of B. In the figure, 1 is a frame, 2 is a stator, 3 is a stator core, 4 is a stator winding, 5 is a can, 6 is a bladder/throat on the anti-load side,
8.11 is the intermediate bearing, 10 is the load side brary", 1., 13
is the rotor core, 9 is the tenth water seal member, 12 is the second water seal member, 14 is the rotor shaft, 17 is the filled liquid, 18 is the fifth water seal member, 191 is the sixth water seal It is a member. In the figure, the same 7 in the figure, ■Cho 1.1. 'rI'il-:l
l j,: L, indicates the portion corresponding to l -J.

Claims (1)

[Claims] a stator, a frame formed from a molding material for molding the stator of Part B, a pair of brackets each coupled to both ends of the frame of Part B and rotatably supporting the rotor shaft;
A thin cylindrical can that is joined to the inner circumferential surface of the stator, fits into the outer circumferential surface of each of the pair of brackets facing the inner circumferential surface of both ends of the can, and a pair of first water seal members that are in watertight pressure contact with the circumferential surfaces, and a pair of first water seal members that are respectively fitted on the inner circumferential surfaces of both ends of the frame and are in watertight pressure contact with the outer circumferential surfaces of both ends of the can, respectively; A canto motor comprising two water seal members.