CN115378183A - Electric machine with stator housing and bearing flange - Google Patents
Electric machine with stator housing and bearing flange Download PDFInfo
- Publication number
- CN115378183A CN115378183A CN202110560965.6A CN202110560965A CN115378183A CN 115378183 A CN115378183 A CN 115378183A CN 202110560965 A CN202110560965 A CN 202110560965A CN 115378183 A CN115378183 A CN 115378183A
- Authority
- CN
- China
- Prior art keywords
- cooling ribs
- electric machine
- bearing flange
- preparation
- axial direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 67
- 238000004804 winding Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 15
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to an electric machine having a stator housing and a bearing flange, wherein a bearing receptacle is formed on the bearing flange, in which a bearing, in particular a rolling bearing, for rotatably mounting a rotor shaft of the electric machine is received, wherein a lower part of a terminal box of the electric machine is formed on the bearing flange, in particular wherein the bearing flange is formed integrally, in particular in one piece, with the terminal box.
Description
Technical Field
The invention relates to an electric machine having a stator housing and a bearing flange.
Background
It is generally known that electrical machines have a stator housing which surrounds the stator windings.
Disclosure of Invention
The object of the invention is therefore to design the electric machine efficiently.
According to the invention, this object is achieved by an electric machine according to the features given in claim 1.
In the case of an electric machine having a stator housing and a bearing flange, an important feature of the invention is that a bearing receptacle is formed on the bearing flange, in which a bearing, in particular a rolling bearing, for rotatably supporting a rotor shaft of the electric machine is received,
wherein a lower part of a junction box of the motor is formed on the bearing flange,
in particular, the bearing flange is formed integrally, in particular in one piece, with the terminal box.
The advantage here is that, by forming the lower part on the bearing flange, more mass is required, so that the heat generated by the bearing received in the bearing flange, i.e. the heat loss flow, can be better dissipated. Peak temperatures can thus be avoided during operation. A part of the heat flow discharged to the surroundings is discharged to the surroundings through the wall of the lower part and another part of the heat flow is discharged through the rest of the bearing flange. Thus, the motor can be operated at high peak power as well as sustained power without exceeding the critical temperature.
In an advantageous embodiment, the bearing receptacle is spaced apart from the lower part in the axial direction,
in particular wherein the axial direction is oriented parallel to the axis of rotation of the rotor shaft. The advantage here is that the electrical connections are spaced apart from the bearing and therefore stray currents of the bearing cause less interference, in particular with signal and/or data transmission lines which are also introduced into the terminal box from the external environment.
In an advantageous embodiment, a cover part is mounted on the lower part. The advantage here is that the terminal block is arranged on the axial end face and therefore the wiring can be produced starting from the axial direction.
In an advantageous embodiment, the region covered by the cover part in the axial direction adjoins the region covered by the lower part in the axial direction. The advantage here is that the cover part can be assembled starting from the axial direction. Therefore, the wiring can be operated from the axial direction.
In an advantageous embodiment, the region covered by the cover part in the axial direction is separated from the region covered by the lower part in the axial direction by means of an intermediately arranged seal, in particular a planar seal. The advantage here is that the cover part can be assembled starting from the axial direction. Therefore, the wiring can be operated from the axial direction.
In an advantageous embodiment, a seal, in particular a flat seal, is arranged between the lower part and the cover part, in particular axially between the lower part and the cover part. The advantage here is that a high protection level can be achieved.
In an advantageous embodiment, the bearing flange is designed as a casting, in particular made of steel or aluminum. The advantage here is that an efficient discharge of the heat loss flow to the surroundings can be achieved.
In an advantageous embodiment, the cooling ribs, in particular the second cooling ribs and the third cooling ribs, extend on the bearing flange from the lower part up to a first radial distance with respect to the rotational axis of the rotor shaft,
wherein the stator housing is connected to the bearing flange by means of a screw which is arranged radially outside the cooling ribs and/or whose radial distance with respect to the axis of rotation of the rotor shaft is greater than the maximum radial distance of the cooling ribs. The advantage here is that effective heat dissipation can be achieved independently of the assembly orientation of the electric machine.
In one advantageous embodiment, the circumferential angle covered by the lower part in the circumferential direction amounts to 360 °. The advantage here is that the imaginary axis of rotation of the rotor shaft of the electric machine passes centrally through the terminal box. The wall of the lower part thus radially surrounds the axis of rotation, and heat can be rapidly removed in the radial direction over all circumferential angles.
In an advantageous embodiment, the maximum radial distance of the lower part, in particular with respect to the axis of rotation of the rotor shaft, is smaller than:
maximum radial distance of the bearing flange, and/or
Maximum radial distance of the second cooling ribs and/or of the third cooling ribs, and/or
Maximum radial distance of corner regions, and/or
-the maximum radial distance of the screw connecting the bearing flange with the stator housing.
The advantage here is that the lower part is arranged centrally on the bearing flange and thus a substantially similar high-efficiency heat flow is achieved in all radial directions.
In an advantageous embodiment, the opening of the lower part covered by the cover part opens into the surroundings in the axial direction and/or the opening of the lower part covered by the cover part is arranged at the end side in the axial direction. The advantage here is that a wiring starting from the axial direction can be realized.
In an advantageous embodiment, the bearing flange has an opening extending through the bearing flange in the axial direction, in particular into a terminal box formed by the lower part and the cover part, in particular for guiding lines for supplying power to the stator windings enclosed by the stator housing. The advantage here is that the wires of the stator winding can be introduced directly into the terminal box through the opening. Therefore, the wiring, that is, the electrical connection to the power supply line can be easily achieved.
In an advantageous embodiment, the connecting device, in particular the terminal block, is arranged in a terminal box formed by the lower part and the cover part, in particular for electrically connecting lines leading out of the stator winding to supply lines leading from the outside environment into the terminal box. The advantage here is that simple and effective manufacturability is possible.
In an advantageous embodiment, the supply line is guided through a cable sleeve received in the wall of the lower part. The advantage here is that a high protection level can be effectively achieved.
In an advantageous embodiment, the line leading from the stator winding through the opening is led through a further cable bushing arranged on the bottom of the lower part. The advantage here is that a high protection level can be achieved. The cable sleeve is preferably made of plastic.
In an advantageous embodiment, the second cooling ribs and the third cooling ribs extend on the bearing flange from the lower part up to a first radial distance, in particular up to a first radial distance with reference to the rotational axis of the rotor shaft,
wherein the second cooling ribs are oriented parallel to each other and/or spaced apart from each other,
wherein the third cooling ribs are oriented parallel to each other and/or spaced apart from each other,
wherein the second cooling ribs extend non-parallel to the third cooling ribs and in particular perpendicular to the third cooling ribs,
in particular wherein the area covered by the second cooling ribs in the axial direction is identical and/or identical to the area covered by the third cooling ribs in the axial direction. The advantage here is that the bearing flange has an outer circumferential portion corresponding to the circular flange on its side facing away from the stator housing. The cooling ribs therefore extend only up to this outer circumferential portion, as in the case of circular flanges. Because the second cooling fin is not parallel with the third cooling fin, effective convection heat dissipation can be realized independently of the installation position of the motor.
In one advantageous embodiment, corner regions which are spaced apart from one another in a particularly uniform manner in the circumferential direction are formed on the bearing flange,
the corner area is arranged radially outside the radial distance area covered by the second cooling rib and the third cooling rib,
and/or the corner region has an opening passing through the corner region in the axial direction, through which a screw for connecting the bearing flange to the stator housing is guided.
The advantage here is that the bearing flange has an outer circumference corresponding to the square flange, facing the stator housing. Thus enabling an efficient connection.
In an advantageous embodiment, the maximum radial distance of each second cooling rib and each third cooling rib is always equal, i.e. in particular all second cooling ribs and third cooling ribs extend radially up to this radial distance. The advantage here is that the cooling ribs extend as far as the outer circumference of the circular flange formed on the bearing flange.
In one advantageous embodiment, a web region extending in the radial direction from the bearing receptacle is formed on the bearing flange,
wherein the web region extends up to the maximum radial distance of all second and third cooling ribs. The advantage here is that the heat loss flow which is introduced from the bearing into the bearing flange can be dissipated radially via the web region.
In an advantageous embodiment, first cooling ribs extending in the circumferential direction and spaced apart from one another in the axial direction are formed on the stator housing, in particular integrally and/or in one piece on the stator housing.
The advantage here is that an effective cooling can be achieved, in particular independently of the installation position of the electric machine.
Further advantages are given by the dependent claims. The invention is not limited to the combination of features of the claims. Other possible combinations of the features of the claims and/or of the individual claims and/or of the features of the description and/or of the drawings can be made possible for the person skilled in the art, in particular from the objects set forth and/or by comparison with the prior art.
Drawings
The invention will now be described in detail with reference to the schematic drawings:
fig. 1 shows an electrical machine according to the invention with a bearing flange 1 in an oblique view.
Fig. 2 shows the bearing flange 1 in an oblique view of the front side of the bearing flange.
Fig. 3 shows the bearing flange 1 in an oblique view from the rear side of the bearing flange.
List of reference numerals:
1. bearing flange
2. Stator housing with first cooling fins
3. Lower part of junction box
4. Sealing element
5. Cover part of junction box
20. Second cooling fin
21. Cable sleeve
22. Third cooling fin
23. Corner region
30. Tab region
31. Bearing receiving part
Detailed Description
As shown in the figures, the electric machine has a stator housing 2 which is connected to a bearing flange 1 of the electric machine, which receives a bearing for rotatably supporting a rotor shaft of the electric machine in a bearing receptacle 31 formed on the bearing flange 1.
The stator housing 2 has first cooling ribs extending in the circumferential direction, which are each spaced apart from one another in the axial direction. Preferably, the axial distance between the individual cooling ribs, i.e. in particular the distance measured in the direction of the rotational axis of the rotor shaft, is constant, i.e. always the same.
The bearing flange is connected to the stator housing 2 by means of screws.
On the side of the bearing flange 1 facing away from the stator housing 2, a lower part 3 of the terminal box is formed on the bearing flange 1.
A cover part 5 can be fitted on the lower part 3 to form a junction box. A seal 4 is arranged between the lower part 3 and the cover part 5 for sealingly connecting the lower part 3 and the cover part 5.
The connections of the stator winding are led from the stator enclosed by the stator housing 2 through bores running axially through the bearing flange 1 into the terminal box. In this case, a cable bushing 21 is arranged on the bottom of the terminal box, through which the terminals, i.e. the wires, are guided.
The wires are electrically connected by means of terminals received in the terminal box, in particular terminal blocks, to a supply line which runs from the outside through a further cable bushing received in an opening in the wall of the lower part 3.
A high protection level, in particular a high sealing ability, can thus be achieved.
The bearing flange 1 is therefore formed integrally, in particular in one piece, with the lower part 3 of the terminal box.
The lower member 3 is spaced apart from the radially outer peripheral portion of the bearing flange 1.
The third cooling ribs 22 and the second cooling ribs 20, which are likewise formed on the bearing flange 1, i.e. in particular integrally, in particular in one piece, on the bearing flange 1, extend from the lower part 3 to the outer circumferential portion of the bearing flange 1. The respective second cooling ribs 20 are formed parallel to each other. The respective third cooling ribs are also formed parallel to each other.
However, the second cooling ribs 20 extend perpendicular to the third cooling ribs 22. Thus, as efficient a convection cooling as possible can be achieved in each assembly direction.
The heat loss flow generated by the bearing can be efficiently discharged to the ambient air through the second cooling ribs and the third cooling ribs.
Furthermore, a compact design in the radial direction is possible due to the coaxial orientation of the terminal box and/or the lower part 3 relative to the rotor shaft and/or the bearing. It is possible to operate the terminal starting from the axial direction because the wall of the lower part radially surrounds the terminal.
In particular, the axial region covered by the wall of the lower member 3 in the axial direction includes a region covered by the terminal in the axial direction.
A web region 30, in particular a web region 30 which projects toward the stator housing 2 and/or projects in the axial direction, is formed on the inner side of the bearing flange 1 facing the stator housing 2, in particular integrally, in particular in one piece, with the bearing flange 1.
Preferably, the tab regions 30 are evenly spaced from one another in the circumferential direction. The web region 30 extends from the bearing seat to the radially outer edge of the bearing flange 1, thus contributing to an effective dissipation of the heat loss flow generated by the bearing.
The bearing flange 1 has a cylindrical outer circumference on which four corner regions 23, which are spaced apart uniformly from one another in the circumferential direction, are arranged radially and are formed integrally, in particular in one piece, with the rest of the bearing flange 1, in particular as a casting.
The stator housing 2 and the bearing flange 1 are each made of steel or of cast steel.
The screws for connecting the bearing flange 1 to the stator housing 2 pass through axially through bores arranged in the corner regions 23.
The bearing flange 1 is thus connected to the stator housing 2 in the form of a square flange. However, the cooling ribs extend outwardly to the cylindrical outer circumference, so that the bearing flange is identical to the circular flange on its side facing away from the stator housing 2.
Preferably, the distance of the outer edge of the corner region 23 to the rotational axis of the rotor shaft is the same as the maximum radial distance of the cylindrical outer circumference.
In other embodiments according to the invention, the bearing flange 1 is made of aluminum in order to achieve an improved heat dissipation.
Claims (15)
1. An electric machine having a stator housing and a bearing flange,
it is characterized in that the preparation method is characterized in that,
a bearing receptacle is formed on the bearing flange, in which a bearing, in particular a rolling bearing, is received for rotatably mounting a rotor shaft of the electric machine,
wherein, a lower part of a junction box of the motor is formed on the bearing flange,
in particular, the bearing flange is formed in one piece, in particular integrally, with the terminal box.
2. The electric machine of claim 1 wherein the stator is a stator,
it is characterized in that the preparation method is characterized in that,
the bearing receiving portion is spaced from the lower member in the axial direction,
in particular wherein the axial direction is oriented parallel to the axis of rotation of the rotor shaft.
3. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
a cover member is fitted on the lower member.
4. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the area covered by the cover member in the axial direction adjoins the area covered by the lower member in the axial direction,
or
The region covered by the cover part in the axial direction is separated from the region covered by the lower part in the axial direction by means of a seal arranged in the middle, in particular a planar seal.
5. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
a seal, in particular a planar seal, is arranged between the lower part and the cover part, in particular axially,
and/or
The bearing flange is designed as a casting, in particular made of steel or aluminum.
6. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
on the bearing flange, the cooling ribs, in particular the second cooling ribs and the third cooling ribs, extend from the lower part up to a first radial distance from the axis of rotation of the rotor shaft,
wherein the stator housing is connected to the bearing flange by means of a screw which is arranged radially outside the cooling ribs and/or whose radial distance with respect to the axis of rotation of the rotor shaft is greater than the maximum radial distance of the cooling ribs.
7. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the circumferential angle range covered by the lower part in the circumferential direction is 360,
and/or
The maximum radial distance of the lower part, in particular with respect to the axis of rotation of the rotor shaft, being smaller than
Maximum radial distance of the bearing flange, and/or
Maximum radial distance of the second cooling ribs and/or of the third cooling ribs, and/or
Maximum radial distance of corner regions, and/or
-the maximum radial distance of the screw connecting the bearing flange with the stator housing,
and/or
The opening of the lower part, which is covered by the cover part, opens into the environment in the axial direction and/or is arranged at the end side in the axial direction.
8. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the bearing flange has an opening extending through the bearing flange in the axial direction, in particular for passing through a line for supplying power to a stator winding enclosed by the stator housing, the opening in particular into a terminal box formed by the lower part and the cover part.
9. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
a connection device, in particular a terminal block, is arranged in the terminal box formed by the lower part and the cover part, in particular for electrically connecting lines leading out of the stator windings to supply lines leading into the terminal box from the external environment.
10. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the power supply line is led through a cable bushing received in the wall of the lower part.
11. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the lines running from the stator winding through the openings are led through a further cable bushing arranged on the bottom of the lower part.
12. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
on the bearing flange, the second cooling ribs and the third cooling ribs extend from the lower part up to a first radial distance, in particular with reference to the axis of rotation of the rotor shaft,
wherein the second cooling ribs are oriented parallel to each other and/or spaced apart from each other,
wherein the third cooling ribs are oriented parallel to each other and/or spaced apart from each other,
wherein the second cooling ribs extend non-parallel to the third cooling ribs and in particular perpendicular to the third cooling ribs,
in particular wherein the area covered by the second cooling ribs in axial direction is identical or identical to the area covered by the third cooling ribs in axial direction.
13. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
corner regions are formed on the bearing flange which are spaced apart from one another in the circumferential direction, in particular uniformly,
the corner area is arranged radially outside the radial distance area covered by the second and third cooling ribs,
and/or the corner region has an opening running axially through the corner region, through which a screw for connecting the bearing flange to the stator housing passes.
14. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the maximum radial distance of each second cooling rib and each third cooling rib is always the same, i.e. in particular all second cooling ribs and third cooling ribs extend radially up to this radial distance.
15. The electric machine according to any of the preceding claims,
it is characterized in that the preparation method is characterized in that,
a web region extending in the radial direction from the bearing receptacle is formed on the bearing flange,
wherein the web region extends up to the maximum radial distance of all second and third cooling ribs,
and/or
First cooling ribs which extend in the circumferential direction and are spaced apart from one another in the axial direction are formed on the stator housing, in particular integrally and/or monolithically formed on the stator housing.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110560965.6A CN115378183A (en) | 2021-05-19 | 2021-05-19 | Electric machine with stator housing and bearing flange |
| PCT/EP2022/025184 WO2022242904A1 (en) | 2021-05-19 | 2022-04-26 | Electric motor having a stator housing and a bearing flange |
| EP22725363.0A EP4342057A1 (en) | 2021-05-19 | 2022-04-26 | Electric motor having a stator housing and a bearing flange |
| DE102022001455.6A DE102022001455A1 (en) | 2021-05-19 | 2022-04-26 | Electric motor with stator housing and bearing flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110560965.6A CN115378183A (en) | 2021-05-19 | 2021-05-19 | Electric machine with stator housing and bearing flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115378183A true CN115378183A (en) | 2022-11-22 |
Family
ID=84058624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110560965.6A Pending CN115378183A (en) | 2021-05-19 | 2021-05-19 | Electric machine with stator housing and bearing flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115378183A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024141172A1 (en) * | 2022-12-30 | 2024-07-04 | Sew-Eurodrive Gmbh & Co. Kg | Bearing assembly, in particular for a gear motor, an electric motor, or a transmission |
-
2021
- 2021-05-19 CN CN202110560965.6A patent/CN115378183A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024141172A1 (en) * | 2022-12-30 | 2024-07-04 | Sew-Eurodrive Gmbh & Co. Kg | Bearing assembly, in particular for a gear motor, an electric motor, or a transmission |
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