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Water circulating pump, manufacturing method thereof, and heat pump apparatus

A water circulation pump, the technology of the manufacturing method, applied in the direction of the pump device, the components of the pumping device for elastic fluid, the pump, etc., can solve the problems of resin cracking, the gap between the rotor magnet and the iron core becomes larger, and the expansion coefficient is large

Inactive Publication Date: 2013-05-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, since the shaft bounces when the rotor rotates, there are problems such as large vibration due to the swinging rotation of the rotor, partial wear of the bearing, and locking of the rotor by the shaft.
[0007] In addition, it is necessary to consider the swing and rotation of the rotor. In order not to contact the lower casing, the outer diameter of the rotor is reduced, and the gap between the rotor magnet and the iron core becomes larger (the mutual magnetic attraction decreases in proportion to the square of the distance), and the pump's Efficiency reduction and other issues
[0008] When resin is used for the housing, since resin has a larger coefficient of linear expansion than molded resin and metal stators, there are problems such as cracking of the resin due to stress and water pressure caused by cooling and heating cycles.

Method used

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  • Water circulating pump, manufacturing method thereof, and heat pump apparatus
  • Water circulating pump, manufacturing method thereof, and heat pump apparatus
  • Water circulating pump, manufacturing method thereof, and heat pump apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0027] refer to Figure 1 ~ Figure 3 , Embodiment 1 will be described. Embodiment 1 describes the pump 2 (water circulation pump) used in the heat pump device 100 for circulating water. The pump 2 according to Embodiment 1 is characterized in that the gap between the shaft on which the rotor portion is mounted and the mounting portion on the housing side fitted with the shaft (first recess or second recess described later) is filled with a predetermined resin or The adhesive specified for this. By filling the gap with resin or the like, it is possible to reduce the swinging of the rotor portion when the rotor portion rotates. One example of the resin is PPS (polyphenylene sulfide). Examples of adhesives include epoxy and acrylic adhesives.

[0028] figure 1 is a configuration diagram of the heat pump device 100 . figure 2 is a sectional view of the pump 2 .

[0029] (heat pump device 100)

[0030] like figure 1 As shown, the heat pump device 100 is composed of a comp...

Embodiment approach 2

[0054] Next, refer to figure 2 , Figure 4 , Embodiment 2 will be described. Embodiment 2 is in figure 2 Among the upper and lower housings, at least the lower housing 15 is a manufacturing method of the pump 2 formed of thermoplastic resin. The manufacturing method of the pump 2 according to Embodiment 2 is a manufacturing method in which the shaft 27 is fitted into a housing molding mold, thermoplastic resin is injection-molded, and the lower housing 15 is molded in a state where the shaft 27 is fitted. As the thermoplastic resin, there are PPS and SPS (sodium polyvinyl sulfate).

[0055] refer to Figure 4 , the case where the lower case 15 is molded from a thermoplastic resin will be described.

[0056] (S21)

[0057] S21 is a fitting step of the shaft 27 (first fitting step). The mold for forming the lower case 15 used in this step can fit the end of the shaft 27 at a position corresponding to the lower case shaft hole 15 a (second recess). In S21, the end porti...

Embodiment approach 3

[0062] Next, refer to figure 2 , Figure 5 , Embodiment 3 will be described. Embodiment 3 is a manufacturing method of the pump 2 in which the shaft 27 and the molded resin in which the stator is enclosed are embedded in a mold, and thermoplastic resin is injected therein to mold the lower case 15 .

[0063] In the mold for molding lower case 15 according to Embodiment 3, mold resin 16 in a state in which stator 17 a is sealed can also be embedded in the mold for molding according to Embodiment 2 .

[0064] refer to Figure 5 , and a method of manufacturing the pump 2 according to Embodiment 3 will be described.

[0065] (S31)

[0066] S31 is an embedding process. In S31 , the shaft 27 and the “molding resin 16 in the state where the stator 17 a is enclosed” are fitted into the mold for molding the lower case 15 .

[0067] (S32)

[0068] S32 is the injection process of thermoplastic resin. In S32 , the thermoplastic resin is injected into the molding die in which the ...

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Abstract

A highly efficient, long-life water circulating pump with reduced whirling of a rotor part of the pump is provided. At least one of a gap between an end portion of a shaft 17 and an upper casing axial hole 24a and a gap between an end portion of the shaft 17 and a lower casing axial hole 15a is filled with a filler for filling the gap.

Description

technical field [0001] The present invention relates to a water circulation pump and a heat pump device using the water circulation pump. Background technique [0002] A pump used in a conventional heat pump device using water as a refrigerant includes a stator unit, a rotor unit, a pump unit, and a shaft. The shaft is fixed, and the rotor part freely rotates around the shaft. The stator part has an iron core formed by laminating electromagnetic steel sheets, a winding wound around the slit of the iron core via an insulator (insulating member), a circuit board to which leads are connected, and a hollow cylindrical shape with a bottom, that is, roughly a pot shape. lower shell. The circuit board is disposed near the anti-pump portion side of the stator portion. The rotor part is accommodated in the hollow cylindrical interior of the substantially pot-shaped lower case. In addition, a shaft hole into which the shaft fits is formed substantially in the center of the bottom ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D1/00F04D29/42
CPCF04D13/064F04D29/628F04D13/0633Y10T29/49236
Inventor 松永训明麻生洋树山本峰雄川久保守
Owner MITSUBISHI ELECTRIC CORP