CN214900435U - Electric machine - Google Patents
Electric machine Download PDFInfo
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- CN214900435U CN214900435U CN202121104976.5U CN202121104976U CN214900435U CN 214900435 U CN214900435 U CN 214900435U CN 202121104976 U CN202121104976 U CN 202121104976U CN 214900435 U CN214900435 U CN 214900435U
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- stator
- electric machine
- bearing flange
- cooling ribs
- bearing
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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 bearing receptacle a bearing, in particular a rolling bearing, is received for rotatably supporting a rotor shaft of the electric machine, 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 integrally, with the terminal box.
Description
Technical Field
The utility model relates to a motor with stator housing and bearing flange.
Background
It is generally known that electrical machines have a stator housing which surrounds the stator windings.
SUMMERY OF THE UTILITY MODEL
Therefore, the object of the present invention is to design the motor efficiently.
According to the invention, this object is achieved by an electric machine according to the features given below.
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 the lower part of the 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, 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 with respect to 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. The advantage here is that an effective heat dissipation can be achieved independently of the assembly orientation of the electric machine.
In one advantageous embodiment, the circumferential angular range covered by the lower part in the circumferential direction is 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 rib and/or the third cooling rib, 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 bushing received in a wall of the lower part. The advantage here is that a high protection level can be achieved effectively.
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 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 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 an advantageous embodiment, corner regions are formed on the bearing flange which are spaced apart from one another in the circumferential direction in a particularly uniform manner,
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 a recess 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 circumferential portion 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 is formed on the bearing flange, which web region extends in the radial direction from the bearing receptacle,
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.
The present invention is not limited to the above-described combinations of features. The above-described combinations of features and/or individual features and/or other possibilities of reasonable combinations of features described below and/or of features shown in the drawings can be brought about by a person skilled in the art, in particular from the object set out 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
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 in each case 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 with 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 perpendicularly 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 terminals in the axial direction.
On the inner side of the bearing flange 1 facing the stator housing 2, a web region 30 is formed, in particular a web region 30 projecting toward the stator housing 2 and/or projecting in the axial direction, which is formed, 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 are arranged radially, which are spaced apart uniformly from one another in the circumferential direction, 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 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 axis of rotation 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 (23)
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 receiving portion in which a bearing for rotatably supporting a rotor shaft of the motor is received is formed on the bearing flange,
wherein the lower part bearing flange of the terminal box of the motor formed on the bearing flange is formed integrally with the terminal box.
2. The electric machine of claim 1, wherein the bearing is a rolling bearing.
3. The electric machine according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the bearing receptacle is spaced apart from the lower component in an axial direction, wherein the axial direction is oriented parallel to the axis of rotation of the rotor shaft.
4. The electric machine according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
a cover member is fitted on the lower member.
5. The electric machine of claim 4 wherein the stator is a stator,
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.
6. The electric machine of claim 5, wherein the seal is a planar seal.
7. The electric machine of claim 4 wherein the stator is a stator,
it is characterized in that the preparation method is characterized in that,
the seal is arranged axially between the lower part and the cover part,
and/or
The bearing flange is designed as a casting.
8. The electric machine of claim 7, wherein the seal is a planar seal.
9. The electric machine of claim 7, wherein the bearing flange is made of steel or aluminum.
10. The electric machine according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
on the bearing flange, 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 or which has a radial distance with respect to the rotational axis of the rotor shaft which is greater than the first radial distance of the cooling ribs.
11. The electric machine of claim 10 wherein the stator is a stator,
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 with respect to the rotation axis of the rotor shaft is smaller than
Maximum radial distance of the bearing flange, and/or
Maximum radial distance of cooling ribs, and/or
Maximum radial distance of corner regions formed on the bearing flange at a distance from one another in the circumferential direction, or
-the maximum radial distance of the screw connecting the bearing flange with the stator housing,
and/or
A cover part is mounted on the lower part, the opening of the lower part covered by the cover part opening into the surroundings in the axial direction and/or being arranged at the end side in the axial direction.
12. The electric machine of claim 4 wherein the stator is a stator,
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 for passing through a line for supplying power to a stator winding enclosed by the stator housing.
13. The electric machine of claim 12, wherein the opening opens into a junction box formed by the lower member and the cover member.
14. The electric machine of claim 13 wherein the stator is a stator,
it is characterized in that the preparation method is characterized in that,
a connection device for electrically connecting lines leading out of the stator windings to supply lines leading from the external environment into the terminal box is arranged in the terminal box formed by the lower part and the cover part.
15. The electric machine of claim 14 wherein the wiring device is a terminal block.
16. The electric machine of claim 14 wherein the stator is a stator,
it is characterized in that the preparation method is characterized in that,
the power supply lines are led through a cable bushing received in the wall of the lower part.
17. The electric machine of claim 14 wherein the stator is a stator,
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.
18. The electric machine according to claim 1 or 2,
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 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 fins do not extend parallel to the third cooling fins,
wherein the area covered by the second cooling ribs in the axial direction is identical or identical to the area covered by the third cooling ribs in the axial direction.
19. The electric machine of claim 18, wherein the second cooling ribs extend perpendicular to the third cooling ribs.
20. The electric machine of claim 18 wherein the stator is a stator,
it is characterized in that the preparation method is characterized in that,
corner regions are formed on the bearing flange so as to be spaced apart from each other in the circumferential direction,
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 running axially through the corner region, through which a screw for connecting the bearing flange to the stator housing passes.
21. The electric machine of claim 20 wherein the corner regions are evenly spaced.
22. The electric machine of claim 18 wherein the stator is a stator,
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, to which maximum radial distance all second cooling ribs and third cooling ribs extend in radial direction.
23. The electric machine of claim 22 wherein the stator is a stator,
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 extending in the circumferential direction and spaced apart from one another in the axial direction are formed on the stator housing, the first cooling ribs being formed integrally on the stator housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121104976.5U CN214900435U (en) | 2021-05-19 | 2021-05-19 | Electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121104976.5U CN214900435U (en) | 2021-05-19 | 2021-05-19 | Electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214900435U true CN214900435U (en) | 2021-11-26 |
Family
ID=78936532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121104976.5U Active CN214900435U (en) | 2021-05-19 | 2021-05-19 | Electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214900435U (en) |
-
2021
- 2021-05-19 CN CN202121104976.5U patent/CN214900435U/en active Active
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