CN101050769A

CN101050769A - Pump and manufacturing method thereof

Info

Publication number: CN101050769A
Application number: CNA2007100898607A
Authority: CN
Inventors: 秋吉卓也
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2006-04-07
Filing date: 2007-04-05
Publication date: 2007-10-10
Anticipated expiration: 2027-04-05
Also published as: CN100491739C; KR20070100642A; JP2007278195A; KR100873753B1; KR20080083250A; US20070237660A1; KR100873754B1; JP4760503B2

Abstract

A pump includes a pump unit having an impeller for sucking and/or discharging liquid; a motor unit for driving the pump unit; a case for accommodating the pump unit; a partition plate for isolating the motor unit from the pump unit; and a mold resin integrally formed with the motor unit to protect the motor unit. Further, a bottom portion of a cylindrical portion projecting from the partition plate to the motor unit has a liquid-free surface having a convex spherical shape. Moreover, a method of manufacturing a pump, the method includes the steps of installing a partition plate at a lower half; installing a stator and a controlling part at the partition plate; closing the lower half with an upper half; curing resin after filling the resin into a cavity formed between the lower and the upper half; opening a mold; and extracting a molded motor product.

Description

Pump and manufacture method thereof

Technical field

The present invention relates to a kind of by sucking and the pump and the manufacture method thereof of the motor driven that discharge liquid is used.

Background technique

Generally, pump comprises: motor unit, this motor unit have the stator of using in generation magnetic field and control the controller that stator is used; The pump unit, this pump unit has impeller, goes the field drives that produced by described stator, and suction/exhaust fluid, such as liquid etc.; And the dividing plate that is used to separate motor unit and pump unit.

Especially, in order to prevent motor owing to the intrusion of the liquid of revealing from the pump unit or owing to the high corrosion that produces of humidity the installation environment of pump, resin is applied to motor unit and is used for protecting.

In said pump, because dividing plate can deform owing to the outside of the pressure that produces in the pump operation process towards pump, so the bottom surface of dividing plate should have bigger thickness.In addition, the use of a large amount of resins may cause the rising (for example, referring to Japanese patent application No.2004-60620) of the manufacture cost of pump.

In addition, when resin was injected into injection mould, in order to cover motor and to make resin solidification with described resin, the bottom surface of described dividing plate was compressed by resin pressure and is out of shape.Therefore, be difficult to obtain the inside dimension of pump unit in the allowable limit of hope.For this reason, be arranged in the part relevant with Location accuracy in the pump, for example, impeller etc. should carry out machining by lathe etc., thereby increase the manufacture cost of pump.

Summary of the invention

Therefore, an object of the present invention is to provide a kind of pump, described pump can reduce makes the material that dividing plate is used, and the distortion of the bottom surface of inhibition dividing plate is to increase the dimensional stability of product.

According to one embodiment of the present of invention; pump provided by the invention comprises: the pump unit with impeller that suction/discharge liquid uses; the motor unit of driven pump unit; the shell that holds described pump unit; be used to separate the dividing plate of motor unit and pump unit; and with the whole molding resin that forms with the protection motor unit of described motor unit, wherein the bottom of outstanding cylindrical part has aneroid (liquid-free) surface from dividing plate towards motor unit, it is the convex surfaces of sphere.

Here, the bottom of described cylindrical part has relative less area and high intensity.

Therefore, it is possible reduce making the material that dividing plate uses.In addition, it also is possible that such pump is provided, that is, described pump can suppress the distortion of dividing plate bottom surface to increase the dimensional stability of product.

Description of drawings

Above-mentioned and other purpose of the present invention and feature will become clear from the following embodiment's who provides in conjunction with respective drawings explanation, wherein:

Fig. 1 is the cross sectional view according to the pump of first embodiment of the invention;

Fig. 2 is according to described embodiment of the present invention, is illustrated in the cross sectional view that lower half portion is installed the technology of each parts;

Fig. 3 is the cross sectional view according to described embodiment of the present invention technology of closed mould before forming molding process;

Fig. 4 is the cross sectional view that resin is filled into the technology of mould according to described embodiment of the present invention; With

Fig. 5 is according to embodiments of the invention, takes out the cross sectional view of the technology of motor product after molding process.

Embodiment

Hereinafter, describe embodiments of the invention in detail by the reference respective drawings, therefore, those of ordinary skill in the art can easily implement these embodiments.

(embodiment 1)

As shown in Figure 1, the molding resin 2 that is formed by heat reactive resin etc. is installed in the left side of pump unit 4, is used for the motor unit 1 of driven pump unit 4 with covering.By plastics such as PPS (polyphenylene sulfide) or be disposed in the right side of pump unit 4 by the shell 3 that metal forms such as stainless steel.

Be installed in similarly between motor unit 1 and the shell 3 such as PPS or by the dividing plate 5 that metal forms such as stainless steel by plastics, separate motor unit 1 and pump unit 4,4 invade motor units 1 from the pump unit to prevent circulating liquid.In addition, described dividing plate 5 is outstanding with columniform form at the center of its close motor unit 1.That is, dividing plate 5 has cylindrical part 5A, and its size that has is large enough to hold pump unit 4 wherein.The flange that contacts with motor 1 with shell 3 forms around the opening of cylindrical part 5A.

Motor unit 1 comprises the stator that can produce magnetic field 6 of hollow cylindrical, is used to control the controller 7 of stator 6, and is cured with the molding resin 2 of covering stator 6 and controller 7.Stator 6 is disposed on the periphery of cylindrical part 5A of dividing plate 5, and the outside of stator 6 is covered by resin.

Dunnage 8 is connected to the left side of stator 6, and has

electronic component

16A and 16B and be connected to dunnage 8 such as the controller 7 of resistance, transistor etc.

Simultaneously, pump unit 4 comprises: the cylindrical rotor 11 that rotate in the magnetic field that is formed and produced by stator 6 by permanent magnet; The cylindrical impeller 13 integrally formed and that formed such as PPS by plastics with rotor 11 is by using a plurality of blade 12 suction/discharge cycle liquid that are connected to its surface; That form such as stainless steel by metal and support the cylinder axis 14 of rotor 11 and impeller 13 rotationally; With the hollow cylindrical dash receiver 15 that forms by pottery that is used for fixing described axle 14.

Arranging rotor 11 in stator 6, the cylindrical part 5A place giving prominence to towards motor unit 1 inserts dividing plate 5 between the two.

Impeller 13 with a plurality of blades 12 that form at its outer surface is disposed in the right side of rotor 11 and is integrally formed therewith, and is used for supporting rotationally that the axle 14 of rotor 11 and impeller 13 is installed in the center of rotor 11 and impeller 13.

In addition, dash receiver 15 is connected to the two ends of axle 14 with stationary axle 14.

When driving said pump, the pressure in pump unit 4 can rise.Therefore, the internal pressure of rising can be applied in the liquid contact surface 5a to the 5B inboard, bottom of the cylindrical part 5A of dividing plate 5, so cause dividing plate 5 towards molding resin 2 distortion.Yet, because the protruding 5b of aneroid (liquid free) of the bottom 5B at the cylindrical part 5A place of dividing plate 5 has spherical shape, the about radius of 300mm for example, although described projection has less relatively cross section, the cross sectional moment of inertia that described protruding 5b has is bigger than the cross sectional moment of inertia of the conventional planar with uniform thickness, thereby increase its intensity, therefore suppress the distortion of dividing plate bottom surface.As a result, it is possible reducing dividing plate 5 used material quantities, has therefore reduced manufacture cost.

In addition, as the liquid contact surface 5a of the bottom surface of dividing plate when being flat, described bottom has variable thickness, such as the about 2mm in periphery, and the about 3mm in center.Therefore, the cross sectional moment of inertia of variable thickness approximately is 2.5 times of cross sectional moment of inertia of 2mm uniform thickness, thereby has increased intensity.Selectively, when the liquid contact surface 5a of the bottom surface of dividing plate is concave surface, although the bottom has homogeneous thickness, such as the about thick hollow sphere of 2mm, the cross sectional moment of inertia of described concave approximately is 1.25 times of cross sectional moment of inertia of 2mm uniform thickness, thereby has increased intensity.

The technology that covers motor unit 1 with molding resin will be described below.

As shown in Figure 2, indicate lower half portion of forming dies with reference to label 9.Described lower half portion has the cylindrical protrusions part 20 of the cylindrical part 5A of corresponding dividing plate 5.At first, dividing plate 5 is installed in lower half portion 9, and then, stator 6 and controller 7 are installed in the cylindrical part 5A that gives prominence to from dividing plate 5.At this moment, controller 7 has been connected on the dunnage 8 that is arranged on stator 6.

In Fig. 2, with reference to upper half part of label 10 indication forming dies.When starting former, as shown in Figure 3, lower half portion 9, stator 6 and controller 7 are risen towards upper half part 10, afterwards, the mould sealing.When described mould is closed, in mould, form chamber 21.Then, resin is introduced from the resin inlet 17 that forms in upper half part 10, constantly resin is exerted pressure from former, so molding resin 2 is diffused into each corner in the die cavity 21.In Fig. 4, show that molding resin 2 is just being spread to all corners in the chamber 11.

At this moment, exert pressure to the aneroid surface of dividing plate bottom surface 5b via resin from former.Because the size difference of dividing plate 5, gap S that can the about 0.2mm of generation between the end face 20a of the liquid contact surface 5a of dividing plate 5 bottom surfaces and the convex portion 20 of lower half portion 9.When the insufficient strength of dividing plate bottom surface (cylindrical upper section divides the bottom 5B of 5A) is high, owing to impose on the resin pressure of the aneroid surface 5B of dividing plate 5 bottom surfaces, can make the bottom surface distortion, contact with the surface of the upper surface 12a of lower half portion 9 up to the liquid contact surface 5a towards the aneroid surface of dividing plate bottom surface.

As a result, the position of dash receiver installation surface 18 can be towards lower half portion 9 distortion, so when finishing the installation of each parts, the location dimension of dash receiver installation surface 18 is not different with original planning (design) as desired.Yet, because the lobed spherical shape of aneroid surface 5b, be subjected to impose on the pressure effect of molding resin 2 simultaneously by former, the theory of pushing each other based on surface particle, described aneroid surface can resistance resin pressure, the distortion that suppresses dividing plate 5 bottom surfaces is possible, thereby increases the dimensional stability of product.

In operation subsequently,, open described mould and take out molded motor product keeping the mould sealing after molding resin 2 solidifies.Fig. 5 shows the molded motor product of taking out from described mould.With reference to axle spare of label 19 indications, can utilize the such instrument of tweezers that it is separated to finish the manufacturing of molded motor product.

Although adapting to the liquid supply device of the pump of first embodiment of the invention is illustrated as the body lotion circulation means, but can cooperate various other liquid supply device according to pump of the present invention, such as well pumping equipment, hot liquid feeding mechanism, discharge opeing feeding mechanism or the like.

Go for the various pumps that fuel cell system uses according to pump of the present invention unit, heat pump system, or the like.

Although having made with regard to embodiment, the present invention shows and explanation,, those of ordinary skill in the art should be appreciated that under the situation that does not break away from spirit of the present invention and claims restricted portion, can make variations and modifications.

Claims

1, a kind of pump comprises:

The pump unit, it has and is used to suck and/or the impeller of drain;

Motor unit, it is used to drive described pump unit;

Shell, it is used to hold described pump unit;

Dividing plate, it is used to separate described motor unit and pump unit; With

Molding resin, itself and described motor unit are integrally formed with the protection motor unit,

Wherein, the bottom of outstanding cylindrical part has the aneroid surface, its lobed spherical shape from described dividing plate towards motor unit.

2, pump as claimed in claim 1, wherein, the liquid contact surface of the bottom of described cylindrical part has the spherical shape of depression.

3, a kind of method of making pump, described method comprises the steps:

Dividing plate is installed in lower half portion;

Stator and controlling component are installed at the dividing plate place;

With first partially enclosed lower half portion;

Resin is injected into go up the chamber that forms between lower half portion after, make described resin solidification;

Open mould; With

Take out molded motor product.