CN1621695A

CN1621695A - Centrifugal pump especially for domestic appliances and other similar products

Info

Publication number: CN1621695A
Application number: CN 200310124812
Authority: CN
Inventors: S·伊亚科卡
Original assignee: PLASSET CO Ltd
Current assignee: PLASSET CO Ltd
Priority date: 2003-11-26
Filing date: 2003-11-26
Publication date: 2005-06-01
Anticipated expiration: 2023-11-26
Also published as: CN100465455C

Abstract

The pump for household appliance and similar products includes a synchronous AC motor with permanent magnetic rotor, vane impeller with rotor extending to the hub cavity, the first and the second connection structures separately in the end of the rotor and in the hub of the impeller and including one transverse part extending from the driving body of rigid material on the rotor and one damping structure comprising an elastic sheet on the driving body and a middle connecting and holding part with at least one part penetrating the driving body for firm fixing of the damping structure on the driving body.

Description

Be particularly useful for the centrifugal pump in household electric appliance and other similar product

Technical field

The present invention relates generally to pump, in particular for the pump in household electric appliance and other similar product.

More specifically, the present invention relates to a kind of centrifugal pump of this type, it comprises:

Support housing, this support housing comprises main body and spiral case, thus its middle pump body and spiral case are interconnected with one another and define an active chamber,

By exchanging electrically driven (operated) synchronous motor, this motor have with respect to the static stator of main body and the p-m rotor that in main body, rotates and

Be rotatably installed in the blade impellers in the active chamber, the wheel hub of this impeller has a cavity; Impeller links to each other with the end of rotor in extending to the impeller hub cavity;

The end of described rotor and impeller hub have the first and second horizontal linkage structures respectively, this horizontal linkage structure has angle of strike separately, angle of strike is preset in the mode with angular clearances, is suitable for the startup of acceleration motor between the wheel hub of rotor and impeller; This structure can be interfered behind motor start-up mutually, thereby makes the rotor driven impeller;

The linkage structure parts of the rotor of working in coordination with the linkage structure of impeller are made by elastic material.

Background technique

Such centrifugal pump has for example been described in European patent EP-0207430-B1.Particularly in an embodiment shown in the accompanying drawing 13 of this piece document, the linkage structure of rotor is made of the bending area that an elastic material forms, and its radially outmost surface has sawtooth.This zone that is formed by elastic material axially is inserted into the ring cavity that is positioned at rotor, and its radially outmost surface has respective saw teeth.This scheme requires elastic region and rotor respective saw teeth all to have accurate structure.This elastic region is inserted into the interior insertion portion of rotor for preventing to interfere during insertion so need quite accurate relative angle coordinate.In addition, this elastic region is fixed on the rotor in a kind of unsteady mode, particularly in the axial direction.

Another kind of alternative solution has been described in European patent EP-0287984-B1, the fluid of some viscosity, for example oily and have lubricating property grease, be placed in and be sealed in the cavity of impeller hub, be used to reduce the impact between the linkage structure of impeller and rotor and eliminate the corresponding noise that produces.This solution is difficult to be committed to practice and has produced a lot of problems from the viewpoint that will keep the seal isolation of viscous fluid in the cavity of impeller.

Summary of the invention

The objective of the invention is to propose another kind of alternative structure, this structure can overcome the defective of being summarized according in the above prior art solutions.

Above-mentioned purpose with other obtains a kind of as above specified such centrifugal pump according to the present invention, it is characterized in that the linkage structure of rotor comprises:

Basically horizontal appurtenances radially, these appurtenances extend from being fixed on the epitrochanterian made driving main body of rigid material that is essentially, and with this main body be an integral body and

Damping structure, this structure with the monolithic of making by elastic material be cast in drive on the main body and have on two opposing sides that are cast in appurtenances or two faces on end piece, this end piece matches with the linkage structure of impeller, and connect and holding member in the middle of one, these parts and end piece are connected to each other and extend through the driving main body to small part, thereby this damping structure is in a kind of firm mode, axially and angularly, is fixed on and drives on the main body.

Further aspect of the present invention and advantage will occur in the detailed below description, and this description will also fully provide in conjunction with the accompanying drawings by the embodiment who does not limit to.

Description of drawings

Fig. 1 is the axial section schematic representation of the centrifugal pump according to the present invention;

The planimetric map of Fig. 2 for looking up from impeller bottom side according to the pump of Fig. 1;

Fig. 3 and Fig. 4 are respectively the line III-III of Fig. 2 and the sectional view on the IV-IV;

Fig. 5 a is according to the perspective view that drives main body in the pump of Fig. 1;

Fig. 5 b is the perspective view according to the driving main body of Fig. 5 a, and this driving main body has the damping structure of being made by elastic material;

Fig. 6 and 7 is respectively the planimetric map on the direction shown in Fig. 5 b arrow VI and the arrow VII;

Fig. 8 and 9 is respectively the line VIII-VIII of Fig. 7 and the sectional drawing on the IX-IX;

Figure 10 is the partial view according to the axial section of another centrifugal pump of the present invention;

Figure 11 is the fragmentary, perspective view according to the driving main body in the pump of Figure 10;

Figure 12 is the view in the horizontal direction on the direction shown in the arrow XII in Figure 11; With

Figure 13 and 14 is respectively the line XIII-XIII of Figure 11 and the sectional drawing on the XIV-XIV.

Embodiment

In Fig. 1, represent with reference character 1 usually according to centrifugal pump of the present invention.

In a kind of known intrinsic mode, pump 1 comprises support housing, and this support housing comprises a forming body 2 and spiral case 3 (dotting), thereby the two interconnects and defines an active chamber 4.

Spiral case 3 forms axial suction passage 3a and laterally exports or transfer passage 3b.

Pump 1 comprises the synchronous motor that is driven and represented with reference character 5 usually by Ac.In the native mode that oneself know, motor 5 comprises stator 6 and the p-m rotor 7 that is rotatably installed in main body in static with respect to main body 2.

In by the embodiment shown in the example, main body 2 forms the chamber 8 of a central cylindrical, and the rotor 7 of motor 5 rotatably is contained in wherein.Rotor has a central shaft 9, and the top and bottom of this central shaft rotatably extend in corresponding supporting 10 and 11, and the chamber 8 interior while toric surface seal rings 12 and 13 separately that supporting is installed in main body 2 also are inserted into wherein.

The upper end 9a of the axle 9 of rotor 7 extends in the active chamber 4 as far as possible far, passes a lip seal 14 that is sandwiched in the annular between upper support 10 and the top resolution element 15, and top resolution element 15 is essentially pit shape.

Pump 1 also comprises the blade impellers 16 that is rotatably installed in the active chamber 4 and links to each other with the upper end 9a of the rotor 9 of motor 5.

Have a center hub 17 as Fig. 2 clearer impeller 16 of anticipating as shown in the present embodiment that shows in Fig. 4, this wheel hub is essentially bell and from this wheel hub four radial blades 18 that stretched out, these blades are divided the space equally in the mode of angle.

The wheel hub 17 of impeller 16 has a cavity 19, and the mouth 20 of this cavity faces motor 5.At this mouth place, the wheel hub 17 of impeller 16 has the projection 20a (seeing Fig. 3 and Fig. 4 for details) of a hoop, this projection 20a and annular shoulder 21 define an annular seating 22, have an airtight element 23 to be stuck in the annular seating with the form of annular disk (Fig. 1), the end 9a of rotor shaft 9 extends through this annular disk and toric surface seal ring 24 also is inserted into wherein.

Airtight element 23 is fixed for rotating together with impeller 16, but it is axle 9 rotations with respect to rotor 7.

The end 9a that extends to the axle 9 in the cavity 19 of impeller 16 is pressed under the situation of interfering by driving in the axial passage 25 that main body 26 limits, wherein drive main body 26 and made by the material that is essentially rigidity, for example polypropylene is in conjunction with 20% to 40% glass fibre and preferably about 30% glass fibre.

In Fig. 9, show driving main body 26 at Fig. 5 especially.

In the embodiment shown in the mode of the example in these accompanying drawings, main body 26 comprises substantially and is the parts 27 of tubulose, forms passage 25 and formed annular projection thing 28 on the circumferencial direction of an integral body at an end place of tubular part in tubular part.

Have whole laterally appurtenances 30 that are essentially radially as the driving main body 26 that illustrates especially among Fig. 5 a.According to Fig. 5 in the embodiment of Fig. 9, these appurtenances 30 are essentially the L of a reversing, and have the first and second arm 30a and 30b (Fig. 5 a and 9), these two arms are connected on tubular part 27 and the circular protrusion 28.

(Fig. 5 a) is limited between two the arm 30a and 30b of appurtenances 30 notch 31.

Slit 32 extends in outside the

face

30c and 30d of the opposite side of lateral surfaces or appurtenances angularly, and this slit is adjacent with appurtenances 30, in the annular projection 28 that drives main body 26.

This slit 32 for example has one, is approximately 90 ° angle of strike.On the other hand, appurtenances 30 have one favourable 25 ° to 55 ° and be preferably about 40 ° angle of strike α (Fig. 6).

The damping structure of making by elastic material 35 with the form of monolithic be cast in drive on the main body 26 and, especially, be to be cast on the horizontal appurtenances 30 that drive main body 26 (seeing Fig. 5 b and 6 for details).This damping structure 35 has two and is cast in the apparent surface of appurtenances 30 or end piece 35a and the 35b on face 30c and the 30d, with middle a connection and holding member 35c (seeing Fig. 7 to 9), parts 35c connects end piece 35a and 35b, and extends in the passage that limits in slit 32 and by the notch 31 of appurtenances 30.

Advantageously, as shown in Figure 6, the end piece 35a of

damping structure

35 and 35b have angle of strike β and γ separately, and they are equal to each other and preferably equal to be sandwiched in their angle of strike α of appurtenances 30 therebetween.Specifically, the end piece of damping structure is 25 ° to 55 ° favourable Yan Shenjiao equally with an angle and preferably approximates 40 ° greatly.

The damping structure 35 of single sheet axially and angularly is fixed on the driving main body 26 in a kind of firm mode simultaneously.

Generally, the appurtenances 30 of main body 26 and the end piece 35a of

interconnective damping structure

35 and 35b have constituted a horizontal linkage structure, this structure usually in accompanying drawing 5b and the following drawings with reference character 40 expression, and the linkage structure that produces in the cavity of this horizontal linkage structure with same wheel hub 17 in blade impellers 16 cooperatively interacts effectively.

With reference to figs. 2 to 4, linkage structure 41 is for extending the segment angle of δ, and wherein the favourable angle of δ is 45 ° to 75 ° and preferably approximates 60 ° greatly, and this linkage structure is formed in the cavity 19 of wheel hub 17 of impeller 16.

The linkage structure 40 of motor rotor and the linkage structure 41 of impeller form in a mode that is limited to the angular clearances between rotor and the impeller hub, in a kind of known intrinsic mode, this angular clearances can acceleration motor 5 startup, as well-known, when starting, produce a low-down connection power, so motor has to starting under the uncharged situation basically.Thereby this

linkage structure

40 and 41 also can be interfered after synchronous motor 5 starts each other impeller 16 is driven by the rotor 7 of motor.

When motor 5 provided with alternating voltage, it can start with a kind of sense of rotation or another kind of sense of rotation on an equal basis possibly.But because pump 1 is a centrifugal pump, so this is unimportant.If the rotor 7 of motor 5 has to overcome an extra resisting moment in the inceptive direction of rotation, sense of rotation be reversed and, in case form the structure 41 of the linkage structure 40 opposing impellers of one with rotor, impeller will be driven in rotary manner.The end 35a of

damping structure

35 and 35b guarantee to reduce to impact and reduce effectively to impact the noise that is produced thus.

Damping structure 35 preferably by, for example a kind of thermoplastic elastomer is made.

Figure 10 to 14 shows distortion of the present invention.

In those figure, described in the above parts have provided the identical reference character that is used to discern with element.

In distortion according to Figure 10 to 14, form the appurtenances 30 of the driving main body 26 of one with the rotor of motor, with the end piece 35a of

damping structure

35,35b has end surface 30e and 35e with respect to the axis tilt that drives main body 26 separately on the face away from annular projection 28.Generally, these end surfaces 30e and 35e have formed the surface elements that is essentially conical and projection.

End surface 30e and 35e are 30 ° to 60 ° preferably and preferably approximate 45 ° greatly with respect to the axial inclination that drives main body 26.

By the claimant and with apply for the test that artificial representative is implemented and emulation has shown as mentioned above and in conjunction with the accompanying drawings this linkage structure 40 of 11 to 14 be in operation and form pressure distribution preferably, particularly in the end piece 35a and 35b of damping structure 35.

Naturally, under the identical situation of principle maintenance of the present invention, embodiment's the form and the details of structure can be done very big change according to those embodiments that have been described and illustrated by non-localized example, extend to all the present invention that can obtain same effect embodiment those identical creationary designs are expressed thanks.

Claims

1. a centrifugal pump (1), the centrifugal pump in particular in household electric appliance and other similar product comprises:

Support housing (2,3), this housing comprise a main body (2) and a spiral case (3), thereby they interconnect and define an active chamber (4),

By exchanging electrically driven (operated) synchronous motor (5), this motor have one with respect to the static stator (6) of main body (2) and one in main body (2) rotatable p-m rotor (7) and

A blade impellers (16) that is rotatably installed in the active chamber (4), and this impeller has a wheel hub (17) that cavity (19) are arranged; The end (9a) of the rotor (7) in the cavity (19) of impeller (16) and the wheel hub that extends to impeller (16) (17) links to each other;

The end (9a) of described rotor (7) and the wheel hub (17) of impeller (16) have the first and second horizontal linkage structures (40,41) respectively, and this linkage structure has an angle of strike (alpha+beta+γ who is preset in the mode of angular clearances respectively; δ), this angle of strike is suitable for the startup of acceleration motor (5) between rotor (7) and impeller (16); Connection set (40,41) can be at motor (5) thereby is interfered each other after starting impeller (16) is driven by rotor (7);

(35a's parts of the linkage structure (40) of rotor (7) 35b) will match with the linkage structure (41) of the impeller of being made by elastic material (16);

Pump (1) is characterised in that the linkage structure (40) of rotor (7) comprising:

Basically horizontal appurtenances (30) radially, these appurtenances (30) extend from the driving main body (26) that is fixed on the rotor (7) that is essentially rigid material and makes, and with this drive main body (26) form one and

One damping structure (35), this damping structure (35) is cast on the driving main body (26) with the monolithic of being made by elastic material and has two apparent surface or face (30c that are cast in appurtenances (30), end piece (35a 30d), 35b), this end piece (35a, 35b) linkage structure (41) with impeller (16) interacts, with middle a connection and holding member (35c), these parts and this end piece (35a, 35b) be connected to each other and extend through at least in part this driving main body (26), thereby this damped part (35) axially and angularly is fixed on the driving main body (26) on the whole in a kind of firm mode.

2. centrifugal pump as claimed in claim 1 wherein drives main body (26) and comprises the parts (27) that are essentially tubulose, and this tubular part (27) is suitable for being pressed on the end (9a) of rotor (7) under the condition of interfering.

3. centrifugal pump as claimed in claim 1 or 2 wherein drives the annular projection (28) that main body (26) has a circumferencial direction, and appurtenances (30) are connected thereto.

4. centrifugal pump as claimed in claim 3, wherein appurtenances (30) have one with tubular part (27) with drive the adjacent notch (31) of annular projection (28) of main body (26), and the intermediate member (30c) that this notch (31) defines damping structure (35) is the passage that extends of portion within it.

5. centrifugal pump as claimed in claim 4, wherein appurtenances (30) are essentially the form of L, and have respectively first and second arms that link to each other with annular projection (28) with the tubular part (27) that drives main body (26) (30a, 30b).

6. as the described centrifugal pump of arbitrary claim in the claim 3 to 5, wherein have and the adjacent slit (32) of appurtenances above-mentioned (30) that is positioned at the annular projection (28) that drives main body (26), this slit (32) extends in the apparent surface or the face (30c of appurtenances (30) angularly, 30d), and the intermediate member (35c) of the damping structure of being mentioned above (32) in slit (35) extends at least in part.

7. the described centrifugal pump of arbitrary as described above claim, the appurtenances (30) that wherein drive main body (26) have one to be 25 ° to 55 ° and preferably to approximate 40 ° angle of strike greatly.

8. centrifugal pump as claimed in claim 7, (35a, 35b) to have one be 25 ° to 55 ° to each end piece of the damping structure of being mentioned above wherein (35) and preferably approximate 40 ° angle of strike greatly.

9. centrifugal pump as claimed in claim 3, wherein drive the appurtenances (30) of main body (26) and the end piece (35a of damping structure (35), 35b) on face, has separately end surface (30e away from annular projection (28), 35e), this end surface (30e, 35e) with respect to the axis tilt that drives main body (26), and generally, formed a surface elements that is essentially circular cone and projection.

10. centrifugal pump as claimed in claim 9, wherein (30e is 30 ° to 60 ° with respect to the inclination that drives main body (26) axis 35e), and is preferably 45 ° end surface.

11. the described centrifugal pump of arbitrary as described above claim wherein drives main body (26) and made by synthetic resin, best is polypropylene, wherein contains 20% to 40%, is preferably 30% glass fibre.

12. the described centrifugal pump of arbitrary as described above claim, wherein damping structure (35) is made by thermoplastic elastomer.