JPS59592A - Motor driven pump apparatus - Google Patents

Abstract

PURPOSE:To simplify the structure of a motor driven pump, to reduce the manufacturing costs and to increase the water resistance, mechanical strength, etc. of the pump, by molding a stator iron core and a stator winding in a watertight manner by a frame made of resin, and coupling the frame to a pump casing in a watertight manner. CONSTITUTION:A circular coupling part 11a of a frame 11 made of resin that molds a stator iron core 2 and a stator winding 3 in a watertight manner is fitted to a coupling part 4a of a pump casing 4 by the intermediary of an O-ring 5. Thus, since the stator iron core 2 and the stator winding 3 are molded in a watertight manner by the frame 11 made of a resin and the frame 11 is coupled to the pump casing 4 in a watertight manner, it is enabled to simplify the structure of a pump.

Description

[Detailed Description of the Invention] This invention uses an axial gap type induction motor as a driving source.
This invention relates to improvements to electric pump devices.

A conventionally known electric pump device of this type will be explained with reference to FIG. In the figure, 1 is one end 1 (11
A bottomed cylindrical frame 1b having a mouth opening 1a is a circular thin plate formed at the bottom of the frame 1, and constitutes a separator. The IC is located at the center of the thin plate part 1b ('+'4
A circular bottomed hole 1d is provided with a small shaft support portion protruding from the inner periphery of the body 1. 2 is a stator core of an annular axial gap type induction motor having one end connected to a thin plate part LB; 3 is a stator core 2 (a stator winding wound around this stator core 2); For example, three connected Hiji wires (not shown) are connected to each other in a terminal box (not shown) connected to the outer end of an opening (not shown) provided in the frame 1. One end is connected to the other end of a composition cable (not shown) connected to a power source. 4 is one end fitting part 4a
is a pump casing connected to the frame body 1t via an O-ring 5, 4b is a spiral chamber provided in this pump casing 4, 40 is a suction port provided in the pump casing 4, and 4d is a suction port provided in the pump casing 4. The vortex H4 is connected through the provided discharge port. 4e is a spider 1 support part provided on the pump casing 4e, which is the same as the bottomed hole 1d.
A bottomed hole 4f is provided on the Q11 section. 5 is a fixed shaft into which both ends of the bottomed hole 1d and the bottomed hole 4f are respectively fitted, and 6.6 is a fixed shaft into which both ends t of the fixed hole 11111+Fl are firmly fitted, and one end of each is fitted into the shaft. Support parts 1c, 4e
A pair of thrust receivers 7.7 are loosely fitted to the fixed shaft 5t, and one end of the flanges 7a, 7a abuts one end of the pair of thrust receivers 6, 6. A pair of bearings 8 has a cylindrical boss portion 8a fitted on the outer circumferential surface of the pair of bearings 7, 7, and both end surfaces of the boss portion 8a are attached to the respective flange portions 7a of the pair of bearings 7, 7, 8b is the suction side of the honeycomb wheel 8, 8C is the discharge side of the honeycomb wheel 8, 8d is a hollow annular portion formed on the stator core 2 side of the honeycomb wheel 8, 9 is inside the second hollow annular part 8d.
The fitted and connected annular rotor core forms the stator core 2.
A) A.

4g is a suction passage that communicates with the suction port 4C and the suction side 8b of the fly wheel 8, and 4h is a discharge passage that communicates with the spiral chamber 4z and the discharge port 4d. Note that a suction pipe (not shown) is watertightly connected to the suction port 401, a discharge pipe (not shown) is connected watertightly to the discharge port 4d, and other end portions of the discharge pipe are connected watertightly. The piping systems are watertightly connected. lO
is a cover having a circular outer circumference and a flat plate shape, which is connected to the opening 1a).

Next, the operation of the system configured as shown here will be explained. When the power supply operation switch is turned on, a rotating magnetic field is generated in the axial gap, so the rotor core 9 and the flywheel 8 fitted and connected with the rotor core 9 are supported by the fixed shaft 5f and moved inside the spiral chamber 4b. to rotate in the specified direction. Rotor core 9
When the fly wheel 8 is full, for example, the hot water in the water heater with one end opening of the suction pipe immersed flows through the suction pipe → suction lo 4C → suction passage 4g → the suction side 8b of the fly wheel → the discharge side 8C of the fly wheel.
→ Suction passage 411 → Discharge port 4d → Discharge pipe → Other piping systems → Circulate like a water heater.

A conventional 111 [dynamic pump device] of this type is constructed as described above, and includes a stator core 2 and a stator wound around the stator core 2 in a bottomed cylindrical frame 1 having a thin plate portion 1b. (3 minutes of the windings must be accommodated and the opening 1a must be watertightly closed with the cover 10).Therefore, it is necessary to manufacture the frame 1 and the cover 10, which increases the manufacturing cost. In addition, the thickness of the thin plate portion 1b is Ii L\, which makes it difficult to manufacture the frame 1, and the thin plate portion 1b is stressed and corroded, making it difficult to maintain the stator core 2 and stator winding 3 watertight. (This has the disadvantage of causing a short circuit accident. Also, the stator core 2, stator coil 3 and frame 1
There is heat dissipation between the inner circumferential surface of There was.

This invention has been made in an attempt to eliminate such deficiency ζ, and an embodiment of the invention will be described with reference to FIG. (shown in the figure), 11 is a frame made of resin in which the stator core 2 and stator winding 3 are watertightly molded, and a circular fitting part 11a is inserted through the O-ring 5. The pump casing 4 is fitted into and connected to the fitting portion 4a of the pump casing 4. Reference numeral 11b is a bottomed hole provided in the center of the frame 11, to which one end of the fixed shaft 5 is coupled. The rest of the structure and operation are the same as those of the conventional electric pump device for this pole, so the explanation will be omitted.

As described above, this invention has a structure in which the stator core and stator winding are watertightly molded in a frame made of resin, and the frame is watertightly connected to the pump casing. It is possible to provide a dynamic pump device that is simple, inexpensive, and has excellent water resistance, thermal conductivity, and mechanical strength.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electric pump device using a conventional axial gap type induction motor as a drive source, and FIG. 2 is a sectional view showing an embodiment of the present invention. In the figure, 2 is an axially gap type city engine stator core, 3 is a stator winding, 4 is a pump casing, 4b is a spiral chamber, 40 is a suction port, 4d is a discharge port, 4g is a water supply passage, 4h' is a discharge passage, 5 is a fixed shaft, 7 is a pair of bearings, 8 is a wing jN, 8a is a boss portion, Bb is a suction side,
8C is the discharge side, 8d is the hollow annular part, 9 is the rotor core, 1
1 is a frame made of resin. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kakuno −μ Figure 1

Claims (1)

[Claims] A stator of an axial gap type induction motor, a frame made of resin that molds the entire circumferential surface of the stator watertightly, and a rotating mechanism that faces the stator through an axial gap and is connected to a flywheel. The child core is coupled to the stator lower end side end face t of the frame body, and the end face e is opposite to the rotor core and a storage chamber for accommodating the flywheel, and a suction port and a discharge port communicating with the storage chamber. an electric pump device comprising: a pump casing having a pump casing; and a fixed shaft having at least one end coupled to the frame body or the pump casing and rotatably supporting the flywheel and the rotor core.