DE202018103767U1 - Motor arrangement with a containment shell - Google Patents

Abstract

Motor arrangement (20) having an external stator (40), a rotor arrangement (30), a containment shell (50) and a bearing arrangement (36, 37) with a first bearing (36) and a second bearing (37), which rotor arrangement (30) an inner rotor (32) and a shaft (31) and an axial direction (77) and a radial direction (78) of the motor assembly (20) defines which motor assembly (20) has a magnetic air gap (53) between the outer stator (40) and the inner rotor (32), which containment shell (50) has a split tube part (51) and a split pot bottom part (52), which split tube part (51) has a canned region (54), which canned region (54) extends through the magnetic air gap (53 ), which external stator (40) is arranged around the canned area (54), which canned part (51) and which canned bottom part (52) overlap in a first predetermined axial area (55), wherein in the first predetermined axial area (55) a seal (60) zw is provided to the split tube part (51) and the split pot bottom part (52).

Description

The invention relates to a motor with a split pot.

A containment shell can be used constructively to construct an electric motor. Preferably, a containment shell can be used to achieve a seal between an interior space and an exterior space. This may be necessary, for example, when pumping an aerosol containing combustible components.

It is an object of the invention to provide a new engine with a containment shell. This object is achieved by the subject matter of claim 1.

Due to the overlap of the split tube part and the split pot bottom part, the provision of a seal between these parts is simplified and reliable. As is apparent from the dependent claims, the seal may comprise a sealing element, or it may be formed as a cohesive connection between the two parts. The presence of a seal says nothing about the exact quality of the seal or its sealing effect. This depends on the purpose. For protection against dust and splash water, for example, the degree of protection IP 54 may be sufficient for electrical devices. For protection against the escape of explosive aerosols, however, IP 68 or higher may be required.

According to a preferred embodiment, the split pot bottom part has a first bearing seat, in which first bearing seat the first bearing is provided. This facilitates the assembly of the first bearing in the region of the split pot bottom part.

According to a preferred embodiment, the split tube part has a second bearing seat, in which second bearing seat the second bearing is provided. As a result, the assembly of the second bearing is facilitated in the region of the split tube part, and the number of assembly steps can be kept low.

According to a preferred embodiment, the split-pot bottom part is arranged at least partially radially outside the split-tube part in the first predetermined axial region. The split tube part can thereby extend radially outside of the split tube part and define an additional housing section, for example for the stator.

According to a preferred embodiment, the inner rotor and the first bearing are spaced from each other, so that a second axial region between the inner rotor and the first bearing is provided, and the first predetermined axial region is provided in the axial direction partially or completely in the second predetermined axial region. This allows a short design of the containment shell.

According to a preferred embodiment, the split tube part has an axial end facing the split pot bottom part, and the rotor arrangement extends on both axial sides of the axial end. The embedding of the rotor assembly on both axial sides simplifies the assembly and design of the Rotortopfteils, since this can take contact with the rotor assembly during assembly outside of the split tube part.

According to a preferred embodiment, the split tube part or the split pot bottom part has an annular portion, wherein the outer stator is connected on its outer surface to the annular portion, preferably by a press-fit connection, an adhesive connection or a screw connection. The connection of the external stator with one of the parts advantageously reduces the number of components required.

According to a preferred embodiment, the seal on a sealing element, which is formed as connected to the gap pot bottom part layer of an elastomeric material. Such a sealing element can be produced well and reproducibly, and no additional process step during assembly is required for the addition of a separate sealing element.

According to a preferred embodiment, the sealing element is designed as an injection-molded element. The design as an injection molding is low and possible with low tolerances.

• - radial innen zumindest bereichsweise durch das Spaltrohrteil definiert ist,
• - radial außen zumindest bereichsweise durch das Spalttopfbodenteil definiert ist,
• - auf einer ersten axialen Seite zumindest bereichsweise durch das Spalttopfbodenteil definiert ist, und
• - auf einer der ersten axialen Seite gegenüber liegenden zweiten axialen Seite zumindest bereichsweise durch die Spaltrohrteilvorsprünge oder zumindest bereichsweise durch die Formteilvorsprünge definiert ist,

wobei im Dichtelementraum das Dichtelement angeordnet ist.According to a preferred embodiment, the seal has a sealing element, the split tube part has split tube part projections on the outer surface, the outer stator has a stator core, a winding arrangement and a molded part, the molded part has a plurality of molded part projections, and the motor arrangement defines in the first predetermined axial Area a sealing element space, which sealing element space

• is defined radially inside at least partially by the split tube part,
• is defined radially outside at least partially by the split pot bottom part,
• - Is defined on a first axial side at least partially through the split pot bottom part, and
• - is defined at least partially by the split tube part projections or at least partially by the shaped part projections on one of the first axial side opposite second axial side,

wherein the sealing element is arranged in the sealing element space.

This embodiment advantageously defines a sealing element space in which a sealing element can be provided, and the assembly of the sealing element is possible in an advantageous manner. The second axial side can thus also be defined both at least partially by the split tube part projections and at least partially by the shaped part projections.

According to a preferred embodiment, the sealing element has a sealing ring. Sealing rings are advantageous for a circumferential seal between the components.

According to a preferred embodiment, the sealing element has an O-ring, an X-ring or a V-ring. With these types of sealing elements, a good seal can be achieved in the present embodiment.

According to a preferred embodiment, the sealing element has a support ring and a sealing ring, wherein the support ring rests at least partially against the Spaltrohrteilvorsprünge or at least partially against the molded part projections on the second axial side of the Dichtelementraums, and wherein the sealing ring between the support ring and the first axial side of the Seal element space is arranged. The provision of the support ring leads to a more uniform pressure on the sealing ring when the sealing element space is not the same everywhere. As a result, the sealing effect can be increased.

According to a preferred embodiment, the sealing element is at least partially compressed in the radial direction in the sealing element space. By pressing the sealing effect is increased, and this leads to greater safety.

According to a preferred embodiment, the molded part is designed as Statorendscheibe or as Statorumspritzung. With such moldings, the shape of the molding can be made with very small tolerances and in the desired configuration.

According to a preferred embodiment, the molding is additionally formed as an insulating body on which the winding assembly is wound at least partially. As a result, the molded part can also act as an insulating part, and no additional process steps are necessary in order to produce insulation.

According to a preferred embodiment, the molded part is designed as a carrier for a winding connection. With this configuration, the molded part can serve for the arrangement of a winding connection and realize an additional function.

According to a preferred embodiment, the outer stator has stator slots on the inner surface, which stator slots are designed to enable the outer stator to be pushed onto the split tube part during movement of the split tube part projections in the stator slots when mounting the motor assembly. The orientation of the stator is thus through the split tube part projections.

According to a preferred embodiment, the split tube part projections are formed as ribs and extend in the axial direction into the region of the stator slots, thereby enabling alignment of the outer stator relative to the split tube section. The alignment is thereby given across the movement.

According to a preferred embodiment, a gap tube part projection is arranged at least regionally in each stator slot. The forces are thereby distributed evenly.

In a preferred embodiment, the outer stator has salient stator poles with stator pole heads, and the split tube sub-protrusions engage the region of the stator slots between the stator pole heads. This results in an advantageous embodiment in which Statorpolköpfen an alignment of the stator can be done.

According to a preferred embodiment, the seal is formed as an adhesive bond with an adhesive, which adhesive connects the split tube part and the split pot bottom part together. By the use of adhesive, it is possible to produce a seal without an additional molded sealing element.

According to a preferred embodiment, the seal is formed as a welded joint, which weld joint connects the split tube part and the split pot bottom part together. Welded joints can be made without additional sealing element. In addition, welded joints can be made very dense.

According to a preferred embodiment, the split pot bottom part forms at least partially from a groove, in which groove the split tube part engages, wherein the groove is preferably formed as a circumferential groove. The provision of a groove allows for easy installation with different seals, and the alignment is simplified when joining the components. Alternatively, such a groove can also be formed at the axial end of the split tube part.

According to a preferred embodiment, a pump arrangement comprises a motor arrangement according to one of the preceding claims. Such a pump assembly can be well sealed by the motor assembly. In this case, the area of the inner rotor does not have to be sealed off to the area of the impeller.

• 1 in einem Längsschnitt eine Motoranordnung entsprechend der Erfindung,
• 2 ein Detail II von 1,
• 3 eine Seitenansicht einer Motoranordnung entsprechend der Erfindung,
• 4 eine Draufsicht auf die Motoranordnung von 3 entlang des Pfeils IV von 3,
• 5 in einer raumbildlichen Darstellung einen Teil der Motoranordnung von 1,
• 6 in einer raumbildlichen Darstellung die Motoranordnung entsprechend 5 mit einem Dichtelement,
• 7 einen Schnitt entlang der Schnittlinie VII - VII von 4,
• 8 ein Detail VIII von 7,
• 9 einen Schnitt entlang der Schnittlinie IX - IX von 4,
• 10 ein Detail X von 9,
• 11 in einem Detail entsprechend 8 eine weitere Ausführungsform einer Dichtung,
• 12 in einem Detail entsprechend 8 eine weitere Ausführungsform einer Dichtung,
• 13 in einem Längsschnitt eine weitere Ausführungsform der Motoranordnung, und
• 14 in einer raumbildlichen Darstellung die Motoranordnung von 13 vor der Montage.

Further details and advantageous developments of the invention will become apparent from the hereinafter described and illustrated in the drawings, in no way as a limitation of the invention to be understood embodiments, and from the dependent claims. It shows:

• 1 in a longitudinal section of a motor assembly according to the invention,
• 2 a detail II of 1 .
• 3 a side view of a motor assembly according to the invention,
• 4 a plan view of the engine assembly of 3 along the arrow IV of 3 .
• 5 in a three-dimensional representation of a part of the motor assembly of 1 .
• 6 in a three-dimensional view of the engine assembly accordingly 5 with a sealing element,
• 7 a section along the section line VII - VII of 4 .
• 8th a detail VIII of 7 .
• 9 a section along the section line IX - IX of 4 .
• 10 a detail X of 9 .
• 11 in a detail accordingly 8th another embodiment of a seal,
• 12 in a detail accordingly 8th another embodiment of a seal,
• 13 in a longitudinal section, a further embodiment of the motor assembly, and
• 14 in a three-dimensional view of the engine assembly of 13 before assembly.

Terms such as above, below, left and right refer in the following to the respective representation and may vary from figure to figure.

1 shows a pump assembly 10 with a motor arrangement 20 , and 2 shows the detail II of 1 , The engine arrangement 20 drives over a wave 31 a pump wheel 39 to achieve a pumping action.

The engine arrangement 20 has an outside stator 40 , a rotor assembly 30 , a containment shell 50 and a bearing assembly 36 . 37 with a first camp 36 and a second camp 37 , The rotor arrangement 30 has an inner rotor 32 and a wave 31 , By the rotation of the rotor 32 one through the bearing assembly 36 . 37 predetermined rotation axis 76 becomes an axial direction 77 and a radial direction 78 the engine assembly 20 Are defined. The wave 31 has a first axial end 34 and a second axial end 35 ,

The engine arrangement 20 has a magnetic air gap 53 between the outer stator 40 and the inner rotor 32 , As an air gap (English: air gap) is referred to in electrical engineering in the context of magnetic circles, the space or distance between two opposing surfaces, which lead a magnetic flux, in the present case, the space between the inner rotor 32 and the outer stator 40 of the motor assembly 20 , Thus, the air gap does not have to be an area with air, but it is a magnetically poorly conductive space in which vacuum, air, plastic or another magnetically poor or not well conductive material can be provided.

The outside stator 40 has a stator core 41 , which may be formed, for example, as a laminated core, and a schematically indicated winding arrangement 43 ,

The containment shell 50 has a split pipe part 51 and a split pot bottom part 52 , so it is composed of several parts. The canned part 51 has a canned area 54 passing through the magnetic air gap 53 extends. The outside stator 40 is around the canned area 54 arranged around. In other words, the outside stator is located 40 radially outside of the canned area 54 ,

The canned part 51 and the split pot bottom part 52 overlap in a first predetermined axial range 55 , which first predetermined axial range 55 indicated by two arrows. The canned part 51 and the split pot bottom part 52 So both extend into this first predetermined axial range 55 , In the first predetermined axial range 55 is a seal 60 between the split tube part 51 and the split pot bottom part 52 in the form of a sealing element 61 intended. in the Embodiment is the split pot bottom part 52 on the outside of the sealing element 61 provided, and the split tube part 51 on the inside of the sealing element 61 , However, it is also possible, the split tube part 51 outside and the split pot bottom part 52 within the sealing element 61 to provide, or the split pot bottom part 52 both inside and outside the canned part 51 to provide, or vice versa.

The split pot bottom part 52 has a first camp seat 56 in which the first camp 36 is provided. The first camp 36 is by a spring element 38 acted upon with a force. Alternatively, the second camp 37 be acted upon by a spring element with a force.

The provision of the first bearing seat 56 in the split pot bottom part 52 has the advantage that the assembly is simplified by the fact that the first bearing 36 together with the split pot bottom part 52 can be mounted. In addition, the size of the bearing seat by a corresponding embodiment of the split pot bottom part 52 be varied.

The canned part 51 preferably has a second bearing seat 57 in which the second camp 37 is provided. Due to the multi-part design of the containment shell 50 can the second camp 37 from below into the canned part 51 be introduced, as this before the installation of the split pot bottom part 52 an open axial end 59 Has. In other words, it may be from the axial end 59 be introduced. This is advantageous over a one-piece containment shell, as in a one-piece containment shell, the upper opening must be so large that the rotor can be inserted. Therefore, either large second bearings must be used, or it must be after inserting the rotor 30 additional parts are mounted.

The split pot bottom part 52 is in the first predetermined axial range 55 preferably at least partially radially outside of the split tube part 51 arranged. This allows an advantageous embodiment such that the split pot bottom part 52 also the outer space for the outer stator 40 Are defined. Such as in 7 can be seen, in addition, another area of the split pot bottom part 52 be arranged radially inside. But it is also possible a reverse solution.

In the embodiment, the inner rotor 32 and the first camp 36 spaced apart, so that a second axial region 58 between the inner rotor 32 and the first camp 36 is provided. This allows a short design of the containment shell 50 ,

The canned part 51 has an annular section 70 , and preferred is the outer stator 40 on its outer surface with the annular portion 70 connected. This embodiment is advantageous because of the canned area 54 is preferably formed as small as possible in order to keep the magnetic resistance small. The annular section 70 On the other hand, it can be made thicker to secure the outer stator 40 to enable. The annular section 70 may alternatively as the area of the split tube part 51 be formed, or as an additional housing part.

The sealing element 61 is as with the split pot bottom part 52 bonded layer formed of an elastomeric material. By joining the split tube part 51 and the split pot bottom part 52 arises in the first predetermined axial range 55 a compression or compression of the sealing element 61 ,

In applications where, for example, an air / gasoline mixture through the pump assembly 10 is promoted, is a tightness in the region of the sealing element 61 important. In the case of application mentioned above, however, a maximum pressure difference of 0.2 bar is assumed, and the required tightness could be reliably achieved with the exemplary embodiment shown. The embodiment shown is also suitable for higher pressure differences.

The split pot bottom part 52 preferably has plastic as a material, and it is further preferably formed from plastic. The sealing element 61 is preferably formed of an elastomeric material (elastomer). The production of the sealing element 61 can preferably be done by means of an injection molding process. Well suited is a multi-component process, so in the present embodiment, a 2K injection molding. The split-pot bottom part is preferred first 52 injected, for example. From a thermoplastic material, and then what is sealing element 61 molded, preferably made of an elastomeric material.

The embodiment shown with the attachment of the sealing element 61 as a layer on the split pot bottom part 52 has the advantage that only one component is required for this area during assembly.

3 shows a second embodiment of the pump assembly 10 in a side view from the outside. The pump cover 101 has an inlet 121 and an outlet 122.

4 shows a plan view of the pump assembly 10 from 3 along the arrow IV of 3 ,

5 shows an oblique detail view of the pump assembly 10 from 3 but without the split pot bottom part 52 and without the rotor assembly 30 , The outside stator 40 has stator poles 47 which are also pronounced stator poles 47 can be designated. The stator poles 47 have stator pole heads 48 , The canned part 51 has on the outer surface, ie on the outside of the lateral surface, Spaltrohrteilvorsprünge 63 , The molding 42 has a plurality of molding projections 44 extending to the axial end 59 of the canned part 51 extend to near it.

The molded part tabs 44 and the split pipe part protrusions 63 preferably define a common plane 99 near the axial end 59 of the canned part 51 , see. 8th and 10 , Small deviations or manufacturing tolerances are not critical.

The molded part tabs 44 are preferably arranged such that the stator slots 45 , in particular the stator slots 45 in the area between the Statorpolköpfen 48 , during assembly of the molding projections 44 guided and can be positioned with it.

Preferably, the split tube part projections are 63 formed as ribs extending in the axial direction into the region of the stator 45 extends. This allows an orientation of the outer stator 40 relative to the split tube part 51 be achieved after assembly.

6 shows a detailed view accordingly 5 , In addition, a sealing element 61 in the form of a sealing ring on the split tube part 51 is arranged. The sliding of the sealing element 61 is in the embodiment of the molded part projections 44 and the split tube part protrusions axially limited 63, and the sealing member 61 is preferably both against the Spaltrohrteilvorsprünge 63 as well as against the molding projections 44 at.

7 shows a longitudinal section through the pump assembly 10 from 3 along the section line VI - VI of 4 ,

8th shows the detail VIII of 7 , In the first predetermined axial range 55 in which the split tube part 51 and the split pot bottom part 52 overlap is a sealing element space 62 Are defined. The sealing element space 62 is shown by a dashed line. The sealing element space 62 is radially inside ( 71 ) partially or completely through the split tube part 51 defined, radially outside ( 72 ) partially or completely through the split pot bottom part 52 defined on a first axial side 73 partially or completely through the split pot bottom part 52 defined and on one of the first axial side 73 opposite second axial side 74 partially or completely through the molded part projection 44 Are defined.

The sealing element 61 is in the sealing element space 62 arranged, it is shown in its original form, ie before pushing onto the split tube part 51 and before mounting the split pot bottom 52 , The sealing element space 62 does not have to be complete on all pages 71 . 72 . 73 . 74 defined, but it is sufficient, for example, if there are gaps, but these are so small that the sealing element 61 not from the sealing element space 62 can be moved out.

As can be seen, the sealing element has 61 preferably in the original form has a greater radial extent than the radial extent between the sides 71 . 72 of the sealing element space 62 , As a result, the sealing element 61 during installation in the sealing element space 62 compressed, and this leads to a better tightness between the split tube part 51 and the split pot bottom part 52 ,

The molding 42 as illustrated, may be formed as Statorendscheibe or as Statorumspritzung. In the embodiment as Statorendscheibe the molded part 42 and then pushed onto the stator core. In the embodiment as Statorumspritzung the stator core is preferably completely or partially molded with a plastic and thereby the molding 42 educated.

The molding 42 is preferably additionally formed as an insulator, to which the schematically indicated winding arrangement 43 at least partially wound. It is thus at least partially between the winding assembly 43 and the stator core 41 , The molding is preferred 42 additionally as a support for a winding connection 46 trained, for example, for a pen.

9 shows a longitudinal section through the pump assembly 10 from 3 along the section line VIII - VIII of 4 ,

10 shows the detail X of 9 , In the first predetermined axial range 55 in which the split tube part 51 and the split pot bottom part 52 overlap is like in 8th the sealing element space 62 Are defined. The sealing element space 62 is shown by a dashed line. The sealing element space 62 is radially inside ( 71 ) partially or completely through the split tube part 51 defined, radially outside ( 72 ) partially or completely through the split pot bottom part 52 defined on a first axial side 73 partially or completely through the split pot bottom part 52 defined and on one of the first axial side 73 opposite second axial page 74 partially or completely through the split pipe part projection 63 Are defined.

The sealing element 61 is like in 8th in the sealing element space 62 and the comments on 8th ,

Particularly in the embodiment is that the sealing element space 62 on the axial side 74 in the circumferential direction partially through the molding projections 44 ( 8th ) and partially through the split pipe part projections 63 ( 10 ) is defined.

When the sealing element space 62 By contrast, for example, only by the molding projections 44 would be defined, could the sealing element 61 in the gaps between the molding projections 44 be pressed out of the sealing element space, and the seal would possibly be poor, since the fluid to be pumped could flow out of the pump chamber or rotor chamber addition.

The sealing element 61 is formed in the embodiment as a sealing ring, more precisely defined as an O-ring with a round cross-section in the original form. Alternatively, a training as X-ring with X-shaped cross-section or as a V-ring with V-shaped cross section is possible.

Also in the embodiment of 3 Up to Fig. 9 could be the seal between the split tube part 51 and the split pot bottom part 52 by an embodiment with the sealing element 61 according to 1 respectively.

In the embodiment of the 3 to 9 is different than in the embodiment of 1 the annular section 70 as a section of the canned part 51 educated. The outside stator is preferred 40 with its outside in the annular section 70 pressed. But it can also be done another attachment, for example by gluing or welding. These variants have the advantage that no additional component must be provided as a seal. One speaks of a cohesive connection.

11 shows a detail of the area between the split tube part 51 and the split pot bottom part 52 according to the clipping from 8th , Shown is an adhesive bond 65 with an adhesive, for example a physically setting adhesive or a chemically curing adhesive. Particularly suitable are resin-based adhesives. The adhesive forms a seal between the two parts 51 . 52 ,

It is preferred between the split tube part 51 and the split pot bottom part 52 at least partially a gap 82 provided to provide a space for the adhesive. For this purpose, an axial overlap between the split tube part is preferred 51 and the split pot bottom part 52 intended. The axial overlap can - as in the other embodiments - are provided inside, outside, or inside and outside.

Preferably, the split pot bottom part forms 52 at least partially a groove 83 out, in which the split tube part 51 can intervene. As a result, the adhesive for the adhesive connection 65 in the groove 83 be attached before the split pipe part 51 is introduced into the groove 83. More preferred is the gap 82 on the radially outer side of the split tube part 51 intended. As a result, the adhesive is displaced mainly to the outside, and the risk of contamination of the space for the shaft 31 is reduced.

12 shows another seal between the split tube part 51 and the split pot bottom part 52 in the form of a welded joint 66 , Preferably, the welded joint is produced by ultrasonic welding, but other heat-generating methods are possible.

It's like in 11 and in 8th a groove 83 provided, in which the split tube part 51 extends. The canned part 51 preferably has a tip at its end facing the gap bottom part 81 on, in the ultrasonic welding by means of a vibration generated by a sonotrode heat is generated, which leads to a melting in this area with the tip 81 leads, as there is a linear or punctiform contact of the components 51 . 52 is present. The displaced volume takes place in the groove 83 Space and so does not enter the interior of the engine assembly 20 out. A preferred material for the split pot bottom part 52 is a thermoplastic in the context of ultrasonic welding.

After melting of the plastics involved are both components 51 . 52 comparatively tight and mechanically strong connected to each other. The Gesamtschweißweg, ie the way the two components 51 . 52 When welding together, for example, is about 0.6 mm. In the illustration are the components 51 . 52 presented in the final position in which they dive into each other.

13 shows in a longitudinal section a further embodiment of the pump arrangement 10 , and 14 in a three-dimensional view of the embodiment of 13 ,

As in the embodiments of 5 to 10 becomes the seal 60 between the split tube part 51 and the split pot bottom part 52 through a sealing element 61 formed, in particular by an O-ring. The sealing element space 62 (see. 8th ) is additionally supported by a support ring 64 limited. The support ring 64 serves to the axial pressure on the sealing element 61 distribute more evenly. This may be advantageous, for example, if no Spaltrohrteilvorsprünge 63 (see. 10 ) are provided, or when the molding projections 44 (see. 8th ) not to the sealing element space 62 can be extended. By the support ring, the sealing effect of the seal 60 can be improved, and the sealing effect can be ensured even at a higher pressure difference between the interior and the exterior.

For mounting, for example, after mounting the stator 40 the support ring 64 on the split tube part 51 be deferred. The support ring 64 may, for example, against the molding projections 44 (see. 8th ) or against the split tube part projections 63 (see. 10 ) or against both projections. Subsequently, the sealing element 61 on the split tube part 51 postponed.

Naturally, modifications and modifications are possible within the scope of the invention.

An exemplary embodiment was a pump arrangement 10 shown. However, the invention can also be used for example for a fan or as a drive for another application.

LIST OF REFERENCE NUMBERS

10

pump assembly

20

engine location

30

rotor assembly

31

wave

32

(permanent magnetic) inner rotor

33

retaining elements

34

first axial end

35

second axial end

36

first camp

37

second camp

38

spring element

39

impeller

40

outer stator

41

stator core

42

molding

43

winding arrangement

44

Molding projections

45

stator

46

winding connection

47

stator

48

Statorpolköpfe

50

containment shell

51

Canned part

52

Containment shell base part

53

magnetic air gap

54

Canned area

55

first predetermined axial range

56

first bearing seat

57

second bearing seat

58

second predetermined axial range

59

axial end of the split tube part

60

poetry

61

sealing element

62

Sealing element space

63

Canned Part projections

64

support ring

65

adhesive bond

66

welded joint

70

annular section

71

Sealing element space radially inside

72

Sealing element space radially outside

73

Seal element space first axial side

74

Seal element space second axial side

77

axial direction

78

radial direction

81

Tip at the split tube part

82

gap

83

groove

101

pump cover

105

locking element

106

head Start

107

sealing element

109

sealing element

111

sealing element

Claims (25)

Motor arrangement (20) having an external stator (40), a rotor arrangement (30), a containment shell (50) and a bearing arrangement (36, 37) with a first bearing (36) and a second bearing (37), which rotor assembly (30) has an inner rotor (32) and a shaft (31) and defines an axial direction (77) and a radial direction (78) of the motor assembly (20), the motor assembly (20) defining a magnetic air gap (53) between the outer stator (40) and the inner rotor (32), which containment shell (50) a Spaltrohrteil (51) and a split pot bottom part (52), which Spaltrohrteil (51) has a canned area (54), which canned area (54) through extending the magnetic air gap (53), which outer stator (40) is arranged around the canned area (54), which canned part (51) and which split pot bottom part (52) overlap in a first predetermined axial area (55), wherein in the first predetermined Axial region (55), a seal (60) between the split tube part (51) and the split pot bottom part (52) is provided. Motor assembly (20) according to Claim 1 in which the split-pot bottom part (52) has a first bearing seat (56), in which first bearing seat (56) the first bearing (36) is provided. Motor assembly (20) according to Claim 1 or 2 in which the split tube part (51) has a second bearing seat (57), in which second bearing seat (57) the second bearing (37) is provided. Motor assembly (20) according to any one of the preceding claims, wherein the split pot bottom part (52) in the first predetermined axial region (55) at least partially radially outside of the split tube part (51) is arranged. A motor assembly (20) according to any one of the preceding claims, wherein the inner rotor (32) and the first bearing (36) are spaced apart such that a second axial portion (58) is disposed between the inner rotor (32) and the first bearing (36). is provided, and in which the first predetermined axial region (55) in the axial direction (77) partially or completely in the second predetermined axial region (58) is provided. A motor assembly (20) according to any one of the preceding claims, wherein the split tube member (51) has an axial end (59) facing the containment shell portion (52), and wherein the rotor assembly (30) is disposed on both axial sides of the axial end (59). extends. A motor assembly (20) as claimed in any one of the preceding claims, wherein the split tube portion (51) or the split pot bottom portion (52) comprises an annular portion (70), the outer stator (40) being connected at its outer surface to the annular portion (70). preferably by a press-fit connection, an adhesive connection or a screw connection. A motor assembly (20) according to any one of the preceding claims, wherein the seal (60) comprises a sealing member (61) formed as a layer of elastomeric material bonded to the containment shell portion (52). Motor assembly (20) according to Claim 8 in which the sealing element (61) is designed as an injection-molded element. Motor arrangement (20) according to one of the preceding claims, in which the seal (60) has a sealing element (61), wherein the split tube part (51) has split tube part projections (63) on the outer surface, in which the outer stator (40) has a stator core (41), a winding arrangement (43) and a molded part (42), which molding (42) has a plurality of molding projections (44), and which motor arrangement (20) defines a sealing element space (62) in the first predetermined axial area (55), which sealing element space (62) is defined radially inside (71) at least in regions through the split tube part (51), - Radially outside (72) at least partially defined by the split pot bottom part (52), - Is defined on a first axial side (73) at least partially through the split pot bottom part (52), and - Is defined at least partially by the Spaltrohrteilvorsprünge (63) or at least partially through the molded part projections (44) on one of the first axial side (73) opposite the second axial side (74), wherein in the sealing element space (62), the sealing element (61) is arranged. Motor assembly (20) according to Claim 10 in which the sealing element (61) has a sealing ring. Motor assembly (20) according to Claim 10 or 11 in which the sealing element (61) has an O-ring, an X-ring or a V-ring. Motor arrangement (20) according to one of Claims 10 to 12 in which the sealing element (61) has a support ring (64) and a sealing ring (61), wherein the support ring (64) on the second axial side (74) of the sealing element space (62) against the Spaltrohrteilvorsprünge (63) at least partially partially against the mold part projections (44) is applied, and wherein the sealing ring (61) between the support ring (64) and the first axial Side (73) of the sealing element space (62) is arranged. Motor arrangement (20) according to one of Claims 10 to 13 in which the sealing element (61) is compressed at least in regions in the radial direction in the sealing element space (62). Motor arrangement (20) according to one of Claims 10 to 14 , in which the molded part (42) is designed as Statorendscheibe or as Statorumspritzung. Motor arrangement (20) according to one of Claims 10 to 15 in which the shaped part (42) is additionally designed as an insulating body, on which the winding arrangement (43) is wound at least in regions. Motor arrangement (20) according to one of Claims 10 to 16 in which the molded part (42) is designed as a carrier for a winding connection (46). Motor arrangement (20) according to one of Claims 10 to 17 in which the outer stator (40) on the inner surface Statornuten (45), which Statornuten (45) are adapted to the assembly of the motor assembly (20) sliding the Außenstators (40) on the split tube part (51) with movement of the Gap part protrusions (63) in the stator (45) to allow. Motor assembly (20) according to Claim 18 in which the split tube part projections (63) are formed as ribs and extend in the axial direction into the region of the stator slots (45), thereby enabling alignment of the outer stator (40) relative to the split tube part (51). Motor arrangement after Claim 19 in which a split-tube part projection (63) is arranged at least in regions in each stator slot (45). Motor arrangement (20) according to one of Claims 18 to 20 in that the outer stator (40) has salient stator poles (47) with stator pole heads (48), and wherein the split tube part projections (63) engage the region of the stator slots (45) between the stator pole heads (48). A motor assembly (20) according to any one of the preceding claims, wherein the seal (60) is formed as an adhesive bond (65) with an adhesive, which adhesive interconnects the split tube portion (51) and the split pot bottom portion (52). A motor assembly (20) according to any one of the preceding claims, wherein the seal (60) is formed as a weld joint (66) which weld joint (66) interconnects the split tube member (51) and the split pot bottom member (52). Motor assembly (20) according to any one of the preceding claims, wherein the split pot bottom part (52) at least partially forms a groove (83) in which groove (83) engages the split tube part (51), wherein the groove (83) preferably as a circumferential groove ( 83) is formed. A pump assembly (10) comprising a motor assembly (20) according to any one of the preceding claims.

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