Electric machine for motor vehicle, electric shaft drive, drive train and motor vehicle
By arranging the discontinuity portion and the tooth gap structure on the supply ring, the outflow of the temperature control medium is improved, the problem of medium accumulation and infiltration into the gap is solved, and the operating reliability of the motor is improved.
Patent Information
- Application Number
- CN202422274755.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2023-09-21
- Filing Date
- 2024-09-18
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-09-18
AI Technical Summary
In the prior art, temperature control media easily accumulates in the motor and may penetrate into the gap space, especially when turning or driving on a slope, causing the media to soak the rotating parts of the motor and affecting the normal operation of the motor.
The feed ring is designed to have a discontinuity on the side facing away from the lamination stack, and to have teeth and notches in the circumferential direction to ensure that the temperature control medium can flow out effectively, reduce accumulation, and prevent penetration into the gap space.
By improving the structure of the supply ring, the temperature control medium can flow out better, reducing accumulation and preventing it from seeping into gap spaces, thereby improving the operating reliability of the motor.
Smart Images
Figure CN223462854U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of motor for motor vehicle, the motor includes temperature control device configured to be used to the temperature control of at least part of motor, especially cooling, wherein, motor has lamination set, the lamination set has multiple laminations being arranged abutting each other along the axial direction of motor, wherein, temperature control device has at least one temperature control passage, which extends at least partially through lamination set in axial direction, wherein, supply ring defining supply space is provided adjacent to lamination set in axial direction, and the supply space is communicated with temperature control passage, temperature control medium can be transported by temperature control passage. BACKGROUND
[0002] The motor with temperature control device of the type mentioned in the outset is basically known from the prior art, which is provided for temperature control of the motor, in particular for cooling. The temperature control passage is usually guided through the lamination set of the stator to discharge the heat of the laminations. In order to supply the temperature control medium guided in the temperature control passage to the lamination set, at least one supply ring is usually provided at the axial end of the lamination set, i.e. at the end face of the stator, which delimits a supply space from which the temperature control medium is introduced into the temperature control passage. In other words, the supply space usually forms an annular space into which the temperature control medium is guided. In the supply space, the temperature control medium is under pressure relative to the environment and is sealed relative to the surroundings by the supply ring.
[0003] The temperature control medium enters from the supply space into the temperature control passage through one or more inlet openings, so that the temperature control medium flows through the stator, more precisely the lamination set, and can leave it, usually at the axial end face. In this area, the temperature control medium is guided past the so-called "winding head", i.e. the conductor that protrudes from the lamination set, in order to also temperature control it. After leaving the lamination set and flowing through the winding head, the temperature control medium usually accumulates in the bottom region of the housing, in which a discharge opening is provided. Since a supply ring, more precisely two supply rings, is arranged at the axial end face of the lamination set, there is usually no space for the discharge opening there, so the discharge opening is arranged at a wall portion of the housing that extends in radial direction, i.e. remote from the lamination set.
[0004] This aspect can lead to an accumulation of a certain amount of temperature control medium in the housing until it reaches the discharge outlet. Furthermore, it is possible that, when driving around a bend or on a slope, the liquid surface of the amount of temperature control medium is tilted relative to the housing bottom or relative to the normal due to the acceleration acting on the amount of temperature control medium. Thereby, in unfavorable cases, the temperature control medium can be guided into the gap space between stator and rotor or the temperature control medium can infiltrate the rotating components in the electric machine. Utility model content
[0005] The utility model is based on the purpose of, propose a kind of improved electric machine compared with, the electric machine is especially improved the guidance of temperature control medium, specifically, better prevent temperature control medium infiltrates into gap space.
[0006] As described in the beginning, the utility model relates to an electric machine for a motor vehicle, which has a temperature control device, which is configured for temperature control, for example cooling, of at least one part of the electric machine. The electric machine can be configured, in particular, as a traction drive, in particular as an axle drive, of a motor vehicle. The electric machine has a lamination stack, in which a plurality of laminations are accommodated, which are arranged next to one another in an axial direction. In principle, in the context of the present application, the terms "axial direction", "radial direction" and "circumferential direction" are relative to a longitudinal axis of the electric machine, in particular to a rotation axis of a rotor of the electric machine.
[0007] At least one temperature control channel of the temperature control device extends at least locally in the axial direction through the lamination stack, wherein a temperature control medium is supplied into the temperature control channel via a supply ring, which delimits a supply space, from which the temperature control medium can flow into the temperature control channel. In other words, the supply ring is arranged at the lamination stack such that a supply space is formed between the lamination stack, the supply ring and, if necessary, at least one wall of the housing. The supply ring seals the supply space, in particular, relative to the remaining interior of the electric machine housing by using at least one, in particular two, seals. This makes it possible to guide the temperature control medium in the supply space under pressure and to guide the temperature control medium without pressure after it has left the temperature control channel, for example after it has flowed through the winding head.
[0008] The utility model discloses based on the following cognition: supply ring has at least one discontinuity on the side away from the lamination stack. As described, the supply ring is arranged at the lamination stack, so that the inlet of the temperature control channel in the lamination stack is communicated with the supply space defined by the supply ring. On the opposite side, that is, on the side of the supply ring away from the lamination stack in the axial direction, the supply ring has at least one discontinuity. The discontinuity can be advantageously arranged or the discontinuity can be provided on the supply ring such that the discontinuity can be communicated with the discharge port of the temperature control circuit. In other words, the supply ring can be directly arranged at the lamination stack, and the discharge port is still as close to the lamination stack as possible in order to improve the outflow of the temperature control medium in the bottom area of the motor. If the supply ring is designed in the opposite way without discontinuity, the supply ring will then close the bottom area, so that the discharge port cannot be arranged in this area. By providing the discontinuity, this boundary condition is eliminated, so that the discharge port can be significantly closer to the lamination stack or arranged there, which improves the outflow of the temperature control medium and reduces the amount of temperature control medium blocked in this area.
[0009] The motor can be improved as follows: the supply ring has at least one tooth protruding from the base body of the supply ring in the axial direction on the side away from the lamination stack. The tooth can thus protrude from the base body such that the tooth is surrounded in the circumferential direction by the at least one discontinuity. As an example, two teeth can be provided which are opposite each other in the radial direction or any number of teeth, between which a gap designed as a discontinuity is provided. Thereby it is achieved that the supply ring can be held in its axial position by the at least one tooth in the axial direction, for example can be supported on a housing wall of the housing, while the discontinuity, that is, the at least one gap, can be designed such that the temperature control medium can flow out into the discharge port. As an example, the teeth and the gaps can alternate in the circumferential direction. The base body can in particular be understood as the part of the supply ring which delimits the supply space. On the base body, for example, accommodation for sealing elements, in particular radial and axial seals, is provided.
[0010] It can also be provided for the motor that the at least one tooth is configured to be shorter in the circumferential direction than the discharge port of the temperature control device. According to the described design, the tooth extends in the circumferential direction such that its dimension is smaller than the discharge port of the temperature control device. In other words, the tooth can be arranged in the motor and have an arbitrary orientation in the circumferential direction, since even if the tooth is arranged at the circumferential position of the discharge port, the tooth cannot completely obstruct the discharge port. This in particular provides the advantage that the supply ring can be assembled in the motor without a fixed orientation in the circumferential direction. In the worst case, the at least one tooth is located in the area of the discharge port in the circumferential direction and partially obstructs the discharge port. However, since the dimension of the discharge port, in particular in the circumferential direction, is larger than the tooth, the discharge port is not completely obstructed and the outflow of the temperature control medium is not significantly impeded.
[0011] According to a further design of the electric machine it can be provided that at least one gap configured between two teeth is configured longer in the circumferential direction than the teeth. In principle, the supply ring can thus be arbitrarily positioned into the electric machine, since the teeth located in the region of the discharge opening cannot completely obstruct the discharge opening even in the case of disadvantageous orientations as described above. By configuring the gaps longer in the circumferential direction than the teeth, it is additionally possible to arrange the gaps in complete communication with the discharge opening, i.e. the supply ring can be positioned such that the discharge opening is in complete communication with the gaps, and thus is not obstructed by the teeth.
[0012] According to a further design of the electric machine it can be provided that the temperature control medium accommodated between the edge of the discharge opening and the edge of the gap space defined between the rotor space and the stator space of the electric machine is lower than the connection line between the edge of the discharge opening and the edge. Thus, the temperature control medium that can accumulate in the region of the bottom of the electric machine, in particular in the region of the supply ring, can always be lower than the connection line between the edge of the discharge opening and the edge, in particular regardless of the lateral acceleration or up to a defined lateral acceleration. This means that even in the case of an increased lateral acceleration and a ramp or cornering drive acting on the temperature control medium, only a small amount of temperature control medium can be accommodated between the discharge opening and the edge, so that it cannot exceed the connection line between the discharge opening and the edge. Excess temperature control medium exceeds the edge of the discharge opening and is thus discharged through the discharge opening. In other words, the discharge opening can be so close to the lamination stack that the amount of temperature control medium that can accumulate between the discharge opening and the lamination stack is not sufficient to exceed the edge and to penetrate into the gap space.
[0013] As described above, the supply ring can have at least one tooth that projects in the axial direction from the base of the tooth, i.e. away from the lamination stack in the axial direction. In a further development of the described design it can be provided that the at least one tooth positions the supply ring in the axial direction, in particular between the housing wall of the electric machine housing and the lamination stack. This enables the supply ring with the tooth to abut against another component of the electric machine, for example the housing wall of the electric machine, and thus to be positioned correctly in the axial direction. In particular, by abutting against the housing wall, the supply ring can be pre-stressed in the axial direction relative to the axial end face of the stator, i.e. the end face of the lamination stack. Thus, a seal provided in the region of the supply ring or between the supply ring and the lamination stack can be pre-stressed as desired, thereby improving the sealing effect. In particular, the individual components of the electric machine can thus be assembled from the same side, so that the supply ring, the lamination stack and other components can be positioned into the housing of the electric machine in the axial direction from the same side. Thereby, it is advantageously not necessary to provide additional assembly elements to fix the supply ring in its axial position.
[0014] According to a further design, the electric machine can have the supply ring only on one side of the lamination stack. As described at the outset, electric machine designs are known in which a supply ring is respectively constructed on each side of the lamination stack, for example as a flow inlet on both sides or as a flow inlet and a flow outlet. In the design described herein, the electric machine has only a single supply ring, which is arranged on one of the two axial end faces of the lamination stack, i.e. on one of the end faces of the stator. Thus, no supply ring is provided on the side of the lamination stack opposite the supply ring, but rather the temperature control medium can exit the lamination stack in this region and, for example, under the guidance of the winding head, reach the bottom region of the housing. In this region, the discharge outlet can be arranged particularly close to the lamination stack, since no supply ring needs to be provided in this region.
[0015] In other words, the single supply ring can guide the temperature control medium from the supply space of the supply ring into the lamination stack. There, the temperature control channel can be divided, wherein a first portion returns to the axial end face of the lamination stack on which the supply ring is arranged, wherein a second portion of the temperature control channel leads to the opposite side, so that the temperature control medium is guided through the entire lamination stack on the one hand and a defined portion of the temperature control medium is conducted out of the lamination stack on both sides, for example via the winding head to the bottom region of the housing.
[0016] In addition to the described electric machine, the utility model also relates to an electric shaft drive having the described electric machine. The utility model also relates to a drive train having such a described electric machine and / or a described electric shaft drive. Furthermore, the utility model also relates to a motor vehicle having the described electric machine and / or a described drive train and / or a described electric shaft drive.
[0017] All advantages, details and features described for the electric machine can be fully transferred to the electric shaft drive, the drive train and the motor vehicle. BRIEF DESCRIPTION OF DRAWINGS
[0018] The utility model is explained below with reference to the drawings according to embodiments. These drawings are schematic drawings and:
[0019] Figure 1 A schematic diagram of a portion of an electric machine according to an embodiment is shown;
[0020] Figure 2 A schematic diagram of a portion of an electric machine in the region of a supply ring is shown;
[0021] Figure 3 A schematic diagram of a portion of an electric machine in the region of a discharge outlet is shown; and
[0022] Figure 4 A schematic diagram of a supply ring alone is shown. DETAILED DESCRIPTION
[0023] Figure 1 An electric machine 1 is shown, for example a motor vehicle electric machine 1, which is not shown in detail. The electric machine 1 can be a traction drive of a motor vehicle, for example a component of an electric axle drive or a component of an electric drive train of a motor vehicle. The electric machine 1 has a temperature control device 2, which is configured for temperature control, for example cooling, of the electric machine 1. The temperature control device 2 has a temperature control channel 3, which purely schematically extends through a lamination stack 4 of a stator 5 of the electric machine 1.
[0024] The temperature control channel 3 is schematically shown by arrows, wherein the temperature control channel 3 is supplied with a temperature control medium from a supply space 6, which is delimited by a supply ring 7. The supply space 6 can for example be configured as an annular space, wherein a plurality of inlets for the temperature control channel 3 can be arranged in a circumferential direction in the supply space 6. The supply space 6 is in communication with a supply, by which the temperature control medium is guided into the supply space 6.
[0025] The supply ring 7 has a base body 8, which substantially delimits or seals the supply space 6. Two sealing elements 9, 10 are purely schematically shown on the base body 8, which seal the supply space 6 with respect to the remaining interior space of a housing 11 of the electric machine 1, for example axially and radially. The supply space 6 in turn has a supply, which can be designed arbitrarily, by which the temperature control medium can be introduced into the supply space 6. Here, for example one or a plurality of supplies can be provided at an upper end of the housing 11.
[0026] The supply ring 7 has at least one tooth 12 on the side opposite the lamination stack 4 in the axial direction, which separates the supply ring 7 from a housing wall of the housing 11. In particular, for example as shown in Figure 4 The supply ring 7 has a plurality of teeth 12, which are arranged in the circumferential direction alternatingly with recesses 13. The recesses 13 form here interruptions of the supply ring 7 in the circumferential direction. As Figure 1 Exemplarily shown, such a recess 13 is in communication with a discharge opening 14 in the housing 11 in a lower region of the housing 11 of the electric machine 1. In other words, the discharge opening 14 is not blocked by a tooth 12, but is in communication with the recess 13, so that the temperature control medium leaving the temperature control channel 3 can be discharged through the discharge opening 14.
[0027] As Figures 2 to 4 Exemplarily shown, the recess 13 has a greater extent in the circumferential direction than the teeth 12, namely a greater width or length. In particular, for example a tooth 12 can have a length in the circumferential direction, which is less than half the length of the recess 13 in the circumferential direction. Figure 3It is seen that each tooth 12 is configured to be shorter in the circumferential direction than the discharge opening 14. Thus, regardless of the orientation of the supply ring 7 in the circumferential direction, the discharge opening 14 cannot be obstructed by the tooth 12, even if it happens to be located directly above the discharge opening 14, because the discharge opening 14 extends further in the circumferential direction than the extent of the tooth 12. However, since the length of the gap 13 in the circumferential direction is longer than the length of the tooth 12, the supply ring 7 is normally oriented such that the gap 13 is located above the discharge opening 14, as is also shown in Figure 3 the drawing, so that in both cases the temperature control medium can flow unhindered.
[0028] In Figure 1 the drawing, the connecting line 15 is also shown, which connects the edge of the discharge opening 14 with the edge 16 of the gap between the stator 5 and the rotor 17 of the electric machine 1. In the embodiment shown, the discharge opening 14 can be so close to the lamination stack 4 that the temperature control medium that accumulates in the area between the discharge opening 14 and the edge 16 cannot penetrate into the gap even in the case of transverse acceleration.
[0029] As can also be derived from Figure 1 the drawing, the supply ring 7 is the only supply ring 7, so that the space on the side of the lamination stack 4 opposite the supply ring 7 is free of supply rings 7. This means that in this area it is not necessary to provide a supply ring 7, so that the discharge opening 14' there can be arranged very close to the lamination stack 4, so that the temperature control medium can also flow unhindered there.
[0030] The advantages, details and features shown in the embodiments in connection with the respective drawing can be combined with one another, interchanged with one another and transferred to one another in any way. As described, the electric machine 1 can be a component of an electric axle drive, a component of a drive train or a component of a motor vehicle, so that all the advantages, details and features can also be transferred to the electric axle drive, the drive train and the motor vehicle.
[0031] List of reference signs:
[0032] 1 electric machine
[0033] 2 temperature control device
[0034] 3 temperature control channel
[0035] 4 lamination stack
[0036] 5 stator
[0037] 6 supply space
[0038] 7 supply ring
[0039] 8 base body
[0040] 9, 10 sealing element
[0041] 11 housing
[0042] 12 tooth
[0043] 13 gap
[0044] 14, 14' discharge opening
[0045] 15 connection line
[0046] 16 bevel
[0047] 17 rotor
Claims
1. Electric machine (1) for a motor vehicle, comprising temperature control means (2) configured for temperature control of at least one portion of the electric machine (1), wherein, The electric machine (1) has a lamination stack (4) which has a plurality of laminations which are arranged against one another in an axial direction of the electric machine (1), wherein the temperature control device (2) has at least one temperature control channel (3) which extends at least sectionally in the axial direction through the lamination stack (4), wherein a supply ring (7) which delimits a supply space (6) which is in communication with the temperature control channel (3) through which a temperature control medium can be conveyed is provided in the axial direction adjacent to the lamination stack (4), characterized in that the supply ring (7) has at least one interruption on the side facing away from the lamination stack (4).
2. The electric machine (1) according to claim 1, characterized in that The supply ring (7) has at least one tooth (12) which projects in the axial direction from a base body (8) of the supply ring (7) on the side facing away from the lamination stack (4).
3. The electric machine (1) according to claim 2, characterized in that The at least one tooth (12) is configured to be shorter in the circumferential direction than the discharge opening (14, 14') of the temperature control device (2).
4. The electric machine (1) according to claim 2 or 3, characterized in that At least one gap (13) which is configured between two teeth (12) is configured to be longer in the circumferential direction than the teeth (12).
5. The electric machine (1) according to any one of claims 1-3, characterized in that, The temperature control medium which is accommodated between the discharge opening (14, 14') and an edge (16) which delimits a gap space between a rotor space and a stator space of the electric machine (1) is below a connection line (15) between the edge of the discharge opening (14, 14') and the edge (16).
6. The electric machine (1) according to any one of claims 1-3, characterized in that, The at least one tooth (12) positions the supply ring (7) in the axial direction.
7. The electric machine (1) according to claim 6, characterized in that The at least one tooth (12) positions the supply ring (7) between a housing wall of the electric machine (1) and the lamination stack (4).
8. The electric machine (1) according to any one of claims 1-3, characterized in that, The electric machine (1) has a supply ring (7) only on one side of the lamination stack (4).
9. The electric machine (1) according to claim 1, characterized in that The temperature control device (2) is configured for cooling at least a portion of the electric machine (1).
10. An electrically powered axle drive, characterised in that The electric motor axle drive comprises an electric machine (1) according to any one of the preceding claims.
11. A driveline, characterised in that, The drive train comprises an electric machine (1) according to any one of claims 1 to 9 and / or an electric motor axle drive according to claim 10.
12. Motor vehicle, characterized in that The motor vehicle comprises an electric machine (1) according to any one of claims 1 to 9 and / or a drive train according to claim 11 and / or an electric motor axle drive according to claim 10.