Motor

Abstract

The utility model relates to a motor, which is provided with a stator shell, a stator winding surrounded by the stator shell, especially along the radial direction, a flange component and a rotor shaft supported in a rotatable mode, the rotor shaft penetrates through a through notch of the stator shell, and a flange area is formed on the stator shell. The flange region protrudes in the axial direction into an inner cavity region surrounded by the stator housing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of motor. BACKGROUND

[0002] As is known, the motor has a rotor shaft which is supported in a rotatable manner. SUMMARY

[0003] It is therefore an object of the utility model to improve a motor in which an increased safety shall be achieved.

[0004] According to the utility model, this object is achieved by a motor having the following features.

[0005] In the motor, an important feature of the utility model is that the motor has

[0006] a stator housing,

[0007] a stator winding which is surrounded by the stator housing, in particular in the radial direction,

[0008] a rotor shaft which is supported in a rotatable manner, and

[0009] a flange part,

[0010] wherein the rotor shaft passes through a through-going recess / opening / hole of the stator housing,

[0011] wherein a flange region is formed on the stator housing, which flange region protrudes in the axial direction into an inner cavity region of the motor which is surrounded by the stator housing,

[0012] in particular wherein the flange region is configured annularly, and the rotor shaft passes through an annular opening of the flange region.

[0013] An advantage here is that the support of the rotor shaft is achieved outside the inner cavity region. The bearing is therefore arranged outside the explosion-proof inner cavity region. To this end, the flange region is configured protruding to the inside and a gap of suitable size can therefore be formed between the flange region and the rotor shaft, such that the propagation of an explosion front, in particular into the gap from the inner cavity region, is prevented.

[0014] In an advantageous design, a hollow-cylindrical air gap or clearance is configured between the flange region and the rotor shaft, in particular wherein the gap prevents the propagation of an explosion front. An advantage here is that the gap is configured sufficiently long and narrow, such that the propagation of an explosion front is prevented.

[0015] In an advantageous design, the stator housing is configured uninterruptedly and / or integrally in the region covered by the flange region in the axial direction radially outside the flange region and / or radially outside radially inside the flange region. An advantage here is that the flange region is arranged within the stator housing and the bearing is arranged outside the stator housing.

[0016] In an advantageous design, a flange part is connected to the stator housing, through which the rotor shaft passes. An advantage here is that the bearing is arranged outside the stator housing.

[0017] In an advantageous design, the length measured in the axial direction of the radially inner side of the flange region or the length measured in the axial direction of the gap between the stator housing together with the flange region and the rotor shaft is greater than the length measured in the axial direction of the bearing. An advantage here is that a sufficiently large axial length is provided in order to be able to prevent the propagation of an explosion front.

[0018] In an advantageous design, the flange region is configured in the form of a complete circumferential ring around the recess of the stator housing, in particular uninterruptedly. An advantage here is that an improved explosion protection can be achieved.

[0019] In an advantageous design, the flange region is configured in the form of a complete circumferential ring around the rotor shaft, in particular uninterruptedly. An advantage here is that an improved explosion protection can be achieved.

[0020] In an advantageous design, an axial seal ring is arranged on the side of the bearing facing away from the gap in the axial direction, the axial seal ring being received together with the bearing in a protrusion projecting in the opposite axial direction on the stator housing. An advantage here is that the bearing and the axial seal ring can be received on the stator housing from the environment.

[0021] In an advantageous design, the protrusion projects from the stator housing on the side facing away from the gap in the axial direction. An advantage here is that the bearing and the axial seal ring are arranged outside the explosion protection region. In particular, thermal problems in the region of the bearing or the axial seal ring are thus taken into account.

[0022] In an advantageous design, the axial seal ring seals towards the rotor shaft,

[0023] In particular, a sealing lip of the axial seal ring contacts the rotor shaft. An advantage here is that the sealing function is achieved outside the inner chamber.

[0024] In an advantageous design, the area covered in the axial direction by the stator winding of the electric machine overlaps the area covered in the axial direction by the flange region. The advantage here is that the stator winding overlaps the flange region in the axial direction. The flange part thus projects so far into the inner chamber region that an axial overlap occurs. Here, the stator winding and the flange region are spaced apart from one another in the radial direction.

[0025] In an advantageous design, the area covered in the axial direction by the stator winding of the electric machine overlaps the area covered in the axial direction by the gap, in particular a hollow-cylindrical gap. The advantage here is that the stator winding overlaps the gap in the axial direction. The flange part thus projects so far into the inner chamber region that an axial overlap occurs. Here, the stator winding and the gap are spaced apart from one another in the radial direction.

[0026] In an advantageous design, the area covered in the radial direction by the stator housing of the electric machine completely, in particular strictly, encloses the area covered in the radial direction by the stator winding of the electric machine. The advantage here is that the stator housing encloses the stator winding in the radial direction and is closed on the A side.

[0027] In an advantageous design, a further bearing for rotatably supporting the rotor shaft is received in a bearing flange, the bearing flange being connected to the stator housing on the side of the stator housing which faces away from the flange part in the axial direction, and the bearing flange closing the stator housing, in particular such that the stator winding is enclosed by the stator housing together with the bearing flange in the manner of a housing. The advantage here is that the second bearing can also be arranged outside the inner chamber region and likewise shaped on the bearing flange with a flange region which projects into the inner chamber region, wherein a gap, in particular a hollow-cylindrical gap, can likewise be formed between this flange region and the rotor shaft for preventing the propagation of an explosion front in the gap.

[0028] In an advantageous design, the flange part is arranged radially outside the flange region. The advantage here is that the flange part projects on the outside of the stator housing and the flange region projects on the inside of the stator housing.

[0029] In an advantageous design, the stator housing and the flange part are each made of steel. The advantage here is that an explosion-proof embodiment of the electric machine can be achieved simply.

[0030] The utility model is not limited to the above-mentioned feature combinations. For the person skilled in the art, in particular from the objects proposed and / or by comparison with the prior art, other reasonable combination possibilities of the above-mentioned feature combinations and / or individual features and / or the features to be explained below and / or the features of the drawings can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0031] The utility model will now be explained in detail on the basis of the schematic drawings:

[0032] In Figure 1 the region of the output side of the electric machine according to the utility model, in particular the A side, is shown in cross-section.

[0033] List of reference signs:

[0034] 1 stator housing

[0035] 2 stator winding

[0036] 3 flange region

[0037] 4 bearing

[0038] 5 shaft seal ring

[0039] 6 flange part

[0040] 7 rotor shaft DETAILED DESCRIPTION

[0041] As shown in Figure 1 the electric machine has a stator housing 1 which encloses a stator winding 2 and which receives a bearing 4, in particular a rolling bearing, by means of which the rotor shaft of the electric machine is rotatably supported.

[0042] The axial direction is here always parallel to the rotational axis of the rotor shaft 7. The radial direction is based on the rotational axis of the rotor shaft 7, as is the circumferential direction.

[0043] The stator housing 1 is configured in the region of its output side in the manner of a pot, wherein the rotor shaft 7 passes through an aperture in the pot bottom of the stator housing.

[0044] On the stator housing 1 a flange region 3 is formed which protrudes into the inner cavity region enclosed by the stator housing 1 and which is configured in the manner of a ring around the aperture and / or the rotor shaft 7.

[0045] Between the rotor shaft 7 and the flange region 3 a hollow-cylindrical, in particular very narrow, air gap is configured which serves as a spark-protected gap, so that the electric machine is designed as a press-pack electric machine.

[0046] The axial length of the air gap preferably exceeds the axial construction length of the bearing 4.

[0047] The flange region 3 is arranged radially inside the stator winding 2 of the electric machine.

[0048] The region covered by the flange region 3 in the axial direction overlaps the region covered by the stator winding 2. The flange region 3 thus protrudes into the region covered by the stator winding 2.

[0049] The bearing receiving region, in particular the bearing seat, constructed on the stator housing 1 is arranged on the side of the air gap which faces away from the inner cavity region in the axial direction. In particular, the bearing 4 is thus separated from the inner cavity region by means of the air gap.

[0050] On the side of the bearing 4 which faces away from the air gap in the axial direction, a shaft seal ring 5 is arranged. The shaft seal ring 5 is received in the stator housing 1. To this end and in order to receive the bearing 4, a corresponding protrusion is constructed on the stator housing 1 which points away from the flange region 3, i.e. in particular protrudes into the environment. The axial length of the protrusion exceeds the axial length of the flange region. Here, the protrusion is arranged radially outside the flange region 3 with reference to the rotational axis of the rotor shaft 7.

[0051] The flange part 6 is mounted on the outer side of the stator housing 1 such that the rotor shaft 7 passes through the flange part 6. Since the flange part 6 is only fixed on the stator housing 1 by means of screws which are screwed into threaded holes of the stator housing part, the flange part can be quickly and easily exchanged without changing or influencing the explosion-proof properties of the electric machine. Since, due to the pot-shaped design of the stator housing 1, no explosion-proof spark gap is required between the flange part 6 and the stator housing 1. Such an air gap only exists between the rotor shaft 7 and the flange region 3 of the stator housing 1.

[0052] On the side of the stator housing 1 which faces away from the flange part 6 in the axial direction, a bearing cover is connected to the stator housing 1. The bearing cover in particular covers the pot opening of the pot-shaped stator housing 1 and / or serves as a pot cover of the pot-shaped stator housing.

[0053] A second bearing is received in the bearing cover for rotatably supporting the rotor shaft 7.

[0054] In other embodiments according to the application, instead of an air gap, a gap is used which is at least partially filled with oil and / or grease.

Claims

1. An electric machine, having - a stator housing, - a stator winding radially surrounded by the stator housing, - a rotor shaft supported in a rotatable manner, and - a flange part, characterized in that the rotor shaft passes through a through-opening of the stator housing, a flange region is formed on the stator housing, which flange region protrudes in the axial direction into a region of the interior of the electric machine surrounded by the stator housing. The flange region is configured annularly, the rotor shaft passing through an annular opening of the flange region.

3. The electric machine according to claim 1 or 2, characterized in that a hollow-cylindrical air gap or clearance is configured between the flange region and the rotor shaft, which clearance prevents the propagation of an explosion front.

4. The electric machine according to claim 1 or 2, characterized in that the stator housing is configured uninterruptedly and / or integrally radially outside the flange region and / or radially outside radially inside the flange region in a region covered by the flange region in the axial direction.

5. The electric machine according to claim 1 or 2, characterized in that the flange part is connected to the stator housing, the rotor shaft passing through the flange part.

6. The electric machine according to claim 2, characterized in that a length measured in the axial direction of the radially inside of the flange region or of a clearance arranged between the rotor shaft and the stator housing together with the flange region is greater than a length measured in the axial direction of the bearing.

7. The electric machine according to claim 2, characterized in that the flange region is configured in such a way that it completely surrounds the opening of the stator housing in the circumferential direction, and / or the flange region is configured in such a way that it completely surrounds the rotor shaft in the circumferential direction.

8. The electric machine according to claim 1 or 2, characterized in that a shaft sealing ring is arranged on a side of the bearing facing away from the clearance in the axial direction, which shaft sealing ring is received together with the bearing in a protrusion protruding counter to the axial direction on the stator housing.

2. The electric machine of claim 1, wherein, 9. The electric machine according to claim 8, characterized in that the protrusion protrudes on the stator housing on a side facing away from the clearance in the axial direction.

10. The electric machine according to claim 8, characterized in that the shaft sealing ring seals towards the rotor shaft, a sealing lip of the shaft sealing ring contacting the rotor shaft.

11. The electric machine according to claim 1 or 2, characterized in that a region covered by the stator winding of the electric machine in the axial direction overlaps a region covered by the flange region in the axial direction.

12. The electric machine according to claim 3, characterized in that a region covered by the stator winding of the electric machine in the axial direction overlaps a region covered by the hollow-cylindrical clearance in the axial direction.

13. The electric machine according to claim 1 or 2, characterized in that a region covered by the stator housing in the radial direction completely surrounds a region covered by the stator winding of the electric machine in the radial direction.

14. The electric machine according to claim 1 or 2, characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A further bearing for rotatably supporting the rotor shaft is received in a bearing flange, which is connected to the stator housing on the side of the stator housing axially facing away from the flange part, the bearing flange enclosing the stator housing such that the stator winding is surrounded by the stator housing together with the bearing flange in the manner of a housing.

15. The electric machine of claim 1 or 2, characterized in that The flange part is arranged radially outside the flange region.

16. The electric machine of claim 1 or 2, characterized in that The stator housing and the flange part are each made of steel.

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