CN112769294A - Oil-cooling flat wire motor heat dissipation structure and motor - Google Patents
Oil-cooling flat wire motor heat dissipation structure and motor Download PDFInfo
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- CN112769294A CN112769294A CN202110369785.XA CN202110369785A CN112769294A CN 112769294 A CN112769294 A CN 112769294A CN 202110369785 A CN202110369785 A CN 202110369785A CN 112769294 A CN112769294 A CN 112769294A
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- cooling medium
- slot wedge
- wedge body
- oil
- vortex
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Abstract
The invention provides an oil-cooled flat wire motor heat dissipation structure and a motor, comprising a slot wedge, wherein the slot wedge is inserted into a slot opening of a slot of a stator core, the slot wedge comprises a slot wedge body and a turbulence part, and the turbulence part is arranged on one side surface of the slot wedge body; the quantity of vortex portion is a plurality of, and the same side of slot wedge body is all located to a plurality of vortex portions, and a plurality of vortex portions set up along the length direction of slot wedge body, and coolant sprays on the slot wedge body and flows along slot wedge body surface, and the coolant that flows is cut apart into a plurality of flow layers by vortex portion to form the small area vortex at the back in vortex portion so that coolant keeps the torrent state to flow. The invention has the advantages that the turbulence part is added to disturb the cooling medium flowing between the two coils in the groove, after the cooling medium flows through the turbulence part, small-area eddy current appears behind the turbulence part, the cooling medium in the groove flows and becomes a turbulent current state, the heat convection and exchange capability between the cooling medium and the coils is improved, and the heat radiation performance of the motor is improved.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a heat dissipation structure of an oil-cooled flat wire motor and the motor.
Background
In recent years, with the inclination of national policies, new energy vehicles have been developed at a rapid pace, and various large vehicles and component manufacturers are developing new energy vehicles and supporting facilities thereof meeting market demands, motors are used as one of core components and are integrated with gearboxes or controllers, and with the demand for higher power density, the heat dissipation problem of the motors is more important regardless of being used as a whole or a single motor, and therefore, the cooling mode is also required to be higher.
At present, the heat dissipation of the motor with the same integrated structure mainly adopts the mode that the end parts of the stator and the middle part of the stator core are cooled by oil, and the rotor throws the oil to the end parts at the two sides of the stator. Similar scheme is more suitable for the distribution winding stator, and concentrated winding stator has the limitation to its heat dissipation because the tip is shorter and the tip structure is more dispersed, and the space is great.
In the working process of the motor, the main heating component is a motor stator coil which generates a rotating magnetic field when alternating current passes through and interacts with the magnetic field of the rotor to generate electromagnetic torque, so that the motor rotates. Therefore, temperature rise control of the stator coil becomes very important.
Disclosure of Invention
In view of the above problems, the present invention provides a heat dissipation structure for an oil-cooled flat-wire motor and a motor, so as to solve the above or other problems in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a heat dissipation structure of an oil-cooled flat wire motor comprises a slot wedge, wherein the slot wedge is inserted into a slot opening of a slot of a stator core, the slot wedge comprises a slot wedge body and a turbulence part, and the turbulence part is arranged on one side surface of the slot wedge body;
the quantity of vortex portion is a plurality of, and the same side of slot wedge body is all located to a plurality of vortex portions, and a plurality of vortex portions set up along the length direction of slot wedge body, and coolant sprays on the slot wedge body and flows along slot wedge body surface, and the coolant that flows is cut apart into a plurality of flow layers by vortex portion to form the small area vortex at the back in vortex portion so that coolant keeps the torrent state to flow.
Further, a plurality of spoiler portions are provided to be located in a space between adjacent stator winding coils in one slot of the stator core, and the slot wedge body and the adjacent stator winding coils configure a cooling medium flow space in which the cooling medium is maintained in a turbulent state to flow so that the cooling medium located in the cooling medium flow space can be mixed with the cooling medium on the stator winding coils.
Furthermore, among the plurality of turbulence portions, a gap is formed between the turbulence portion closest to the stator winding coil and the wall surface of the stator winding coil, so that the cooling medium can flow through the gap.
Furthermore, the plurality of turbulence parts are arranged at intervals, the plurality of turbulence parts are at least arranged in one group, and in each group, the adjacent turbulence parts are arranged in a staggered manner so that the plurality of turbulence parts in each group are arranged in a curve shape or a broken line shape, so that the cooling medium is mixed after being disturbed by the turbulence parts;
or in each group, the plurality of turbulence parts are linearly arranged, so that the cooling medium is mixed after being disturbed by the turbulence parts.
Furthermore, in the two groups of turbulence parts close to the adjacent stator winding coils, a gap is formed between the turbulence part closest to the stator winding coil and the wall surface of the stator winding coil, so that the cooling medium can flow through the gap.
Further, in each group of turbulence parts, in the transverse direction, adjacent turbulence parts are arranged at equal intervals with transverse gaps, and in the longitudinal direction, adjacent turbulence parts are arranged at equal intervals with longitudinal gaps.
Furthermore, the turbulence part is a turbulence column.
Furthermore, the cross section of the turbulence column is circular, oval, rhombic or triangular.
Further, the slot wedge still includes reposition of redundant personnel portion, and arbitrary end of slot wedge body is located to reposition of redundant personnel portion, and the slot wedge is installed, and the reposition of redundant personnel portion is corresponding with coolant spray set's nozzle, shunts the coolant who sprays to reposition of redundant personnel portion, shunts most coolant shunt stator core's inslot for coolant flows along the slot wedge body.
Furthermore, the shunting part is convexly arranged on one side surface of the slot wedge body, and the shunting part and the turbulence part are arranged on the same side surface of the slot wedge body.
Further, reposition of redundant personnel portion includes platform portion and transition portion, and platform portion is connected with transition portion, and platform portion sets gradually along the length direction of slot wedge body with transition portion, and the tip parallel and level of platform portion and slot wedge body, and transition portion is the curve structure, and transition portion plane recess is to the slot wedge body.
An oil-cooling flat wire motor comprises the oil-cooling flat wire motor heat dissipation structure.
By adopting the technical scheme, the turbulence part is additionally arranged on the slot wedge of the flat wire concentrated winding motor to disturb the cooling medium flowing between the two coils in the slot, the cooling medium flows through the turbulence part and then generates a small-area vortex behind the turbulence part, the vortex mixes the cooling medium on the upper side and the lower side of the turbulence part after being disturbed, the high-temperature cooling medium on the surface of the coil and the low-temperature cooling medium in the middle of the slot are mixed and then flow back to the surface of the coil, so that the cooling medium flows through the gap between the two coils in a turbulence state, the convection heat exchange capability of the cooling medium and the stator winding coil is enhanced, the heat dissipation efficiency of the cooling medium on the coil is improved, the heat dissipation capability of the motor is improved, and the power density of the motor is improved; the cooling medium in the groove flows to be in a turbulent flow state, the heat convection capacity between the cooling medium and the coil is improved, the heat dissipation performance of the motor is improved, the outflow of the cooling medium at the two ends of the groove can be effectively controlled, the distribution is more reasonable, and the temperature consistency of the coil is improved; the split part is added on the slot wedge, the flow of the cooling medium flowing out from the oil injection port side is restrained, the outflow quantity of the cooling medium at two ends of the slot is reasonably distributed, and the consistency of the coil temperature is improved.
Drawings
Fig. 1 is a schematic view of an installation structure of a stator and a cooling medium spray device according to an embodiment of the present invention;
FIG. 2 is a front view of a slot wedge according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a slot wedge according to an embodiment of the present invention;
fig. 4 is a sectional view of one slot of the stator core according to the embodiment of the present invention, illustrating a flow direction of the cooling medium;
fig. 5 is a schematic view of a cooling medium flow direction in another angular sectional structure of one slot of a stator core according to an embodiment of the present invention;
FIG. 6 is a schematic view of the cooling medium flow direction of the stator winding overhang of an embodiment of the present invention;
FIG. 7 is a schematic structural view of a slot wedge when the cross-sectional shape of the turbulence column is elliptical according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a slot wedge when the cross-sectional shape of the turbulence column is a diamond shape according to an embodiment of the present invention;
FIG. 9 is a schematic structural view of a slot wedge when the cross-sectional shape of the turbulence column is triangular according to an embodiment of the present invention;
fig. 10 is a state diagram of a flow field simulation in which a cooling medium is maintained in a turbulent state according to an embodiment of the present invention.
In the figure:
1. slot wedge 2, coil 3, stator core
4. Oil spout 5, cooling medium spray set 100, slot wedge body
101. A spoiler portion 102, a flow splitting portion.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention, which relates to a heat dissipation structure of an oil-cooled flat wire motor and a motor, and is used for dissipating heat of a flat wire motor, wherein a spoiler is disposed on a slot wedge, so that when a cooling medium flows through a gap between adjacent stator winding coils, a small-area vortex is formed behind the spoiler, and the cooling media at two sides of the spoiler are mixed after being scrambled, so that the cooling medium keeps flowing in a turbulent state, thereby enhancing the heat convection capability between the cooling medium and the stator winding coils and improving the heat dissipation capability of the motor; meanwhile, the slot wedge is provided with the shunting part, so that the flow of the cooling medium flowing out from the oil spraying port side of the cooling medium spraying device is inhibited, the outflow of the cooling medium on the two sides of the slot is reasonably distributed, and the temperature consistency of the stator winding coil is improved.
A kind of oil-cooled flat wire electrical machinery heat-dissipating structure, as shown in figure 1-6, including the slot wedge 1, the slot wedge 1 is inserted in the notch of the trough of the stator core 3, and the slot wedge 1 is abutted against coil 2 of the stator winding located on stator core 3, the slot wedge 1 includes the body 100 of the slot wedge and turbulence part 101, the turbulence part 101 locates on a side of the body 100 of the slot wedge, in order to make the turbulence part 101 can carry on the turbulence to the cooling medium in the course of flowing, the turbulence part 101 locates on a side of the body 100 of the slot wedge facing inside of the trough of the stator core 3;
the number of the turbulent flow portions 101 is multiple, the turbulent flow portions 101 are all arranged on the same side face of the slot wedge body 100, and the turbulent flow portions 101 are arranged along the length direction of the slot wedge body 100 to stir the cooling medium sprayed on the slot wedge body 100, so that the cooling medium does irregular motion, and the cooling medium keeps flowing in a turbulent flow state, because the slot wedge is inserted in the notch of the slot of the stator core 3, the length direction of the slot wedge is the same as the axial direction of the slot of the stator core 3, the turbulent flow portions 101 are arranged along the axial direction of the slot of the stator core 3, and the axial direction of the cooling medium is the same as the flowing direction of the cooling medium, so that the flowing mode of the cooling medium can be changed in the flowing process of the cooling medium, so that the cooling medium keeps in a turbulent flow state when flowing, as shown in fig. 10, after the cooling medium flows through the turbulent flow portions 101, a small-area vortex is formed, this vortex is disturbed the cooling medium remixing of vortex portion 101 both sides for cooling medium gets into two coils 2 respectively at the in-process that flows, flow out again from coil 2 and mix along the cooling medium that 100 length directions of slot wedge body flow, the temperature of the cooling medium on coil 2 surface is higher, the cooling medium temperature that does not flow in coil 2 is lower, the higher cooling medium of temperature mixes the back with the lower cooling medium of temperature and gets into coil 2 again, simultaneously, because the formation of small area vortex, can disperse more cooling medium to coil 2 surface, the radiating efficiency of cooling medium and coil 2 has been improved.
Specifically, as shown in fig. 2 to 5, the stator winding is provided on the stator core 3, and one coil 2 is provided on each tooth portion on the stator core 3, so that there are portions of two coils 2 in each slot of the stator core 3, and a space is provided between the two coils 2 in the slot, and the cooling medium flows in the space to cool the stator winding. The plurality of flow disturbing parts 101 are arranged in a space between adjacent stator winding coils 2 in one slot of the stator core 3, the slot wedge body 100 and the adjacent stator winding coils 2 form a cooling medium flowing space, when a cooling medium flows in the cooling medium flowing space, the cooling medium is divided into a plurality of flow layers by the flow disturbing parts 101 and then mixed, so that the flowing state of the cooling medium is a turbulent flow state and the cooling medium keeps flowing in the turbulent flow state, the cooling medium flows in from one end of the stator core 3, in the flowing process, the cooling medium is blocked by the flow disturbing parts 101, the cooling medium is divided into a plurality of flow layers, after flowing through each flow disturbing part 101, a small area vortex is formed behind the flow disturbing part 101, the cooling medium on two sides of the flow disturbing part 101 is mixed, the vortex simultaneously disperses and flows more cooling medium into the two adjacent coils 2 in the slot, and exchanges heat with the coils 2, the cooling of coil 2 is carried out, the temperature of the cooling medium after heat exchange rises, the cooling medium flows back to the cooling medium flowing space and then mixes with the cooling medium with lower temperature in the space, the mixed cooling medium flows back to the surface of coil 2 again under the turbulent flow effect of another turbulent flow part 101 and exchanges heat with coil 2 again, and the cooling medium passes through the turbulent flow, dispersion and mixing processes for many times in the flowing process of the cooling medium from one end to the other end of stator core 3, so that the heat dissipation efficiency of the cooling medium to coil 2 is improved.
Among a plurality of vortex portions 101, the vortex portion 101 nearest to stator winding coil 2 and stator winding coil 2 wall have the clearance between them, make cooling medium flow through in the clearance, when a plurality of vortex portions 101 set up along the length direction of slot wedge body 100, among a plurality of vortex portions 101, some vortex portions 101 are set up to be close to adjacent stator winding coil 2, and have the clearance between vortex portion 101 nearest to stator winding coil 2 and stator winding coil 2 wall, vortex portion 101 nearest to stator winding coil 2 does not contact with coil 2, so that cooling medium can flow through in the clearance, be convenient for simultaneously with coil 2 through the cooling medium return to in the cooling medium flow space of heat exchange, also be convenient for in cooling medium flow space's cooling medium flows into stator winding's coil 2.
The wedge body 100 has a plate-shaped structure and has a certain width, which is selected according to the structural size of the slots of the stator core 3, and is not particularly required here. The wedge body 100 has a portion inserted into the slot of the stator core 3 so that the wedge can be inserted at the notch of the slot of the stator core 3, and the portion of the wedge body 100 facing the inside of the slot is configured to arrange a plurality of spoiler portions 101. When arranging, a plurality of vortex portions 101 interval sets up, length direction along slot wedge body 100 sets gradually, certain distance has between two adjacent vortex portions 101, and a plurality of vortex portions 101 are a set of setting at least, when a plurality of vortex portions 101 are the multiunit setting, multiunit vortex portion 101 sets up along the width direction of slot wedge body 100, the group number of vortex portion 101 is selected according to the width of slot wedge body 100 and the distance between two sets of adjacent vortex portions 101, do not do the specification here. In each group, adjacent vortex portion 101 crisscross setting is so that a plurality of vortex portions 101 in each group are curve shape or broken line shape setting, namely, in each group's vortex portion 101, a plurality of vortex portions 101 set up along the length direction and the width direction of slot wedge body 100, have two at least vortex portions 101, the vortex portion 101 in two adjacent columns is crisscross the setting, make cooling medium do the curvilinear flow at the flow in-process, maximum and coil 2 contact, and all form the small area vortex behind each vortex portion 101.
Or, in each group, a plurality of vortex portions 101 are the straight line setting to make the cooling medium mix after being disturbed by vortex portion, when a plurality of vortex portions 101 are the straight line setting, then a plurality of vortex portions 101 are a set of at least, and the cooling medium all forms the small area vortex after each vortex portion 101 flows through, makes the cooling medium maximum and coil 2 contact.
In each group of the spoiler portions 101, the adjacent spoiler portions 101 are arranged at equal intervals in the lateral direction with the lateral gap therebetween, and the adjacent spoiler portions 101 are arranged at equal intervals in the longitudinal direction with the longitudinal gap therebetween, and the lateral gap and the longitudinal gap are selected according to the in-slot size structure of the stator core 3, which is not specifically required here. Preferably, in each group of spoiler portions 101, the plurality of spoiler portions 101 are arranged in a sine curve or a cosine curve.
Further optimize the scheme, among the multiunit vortex portion 101, when vortex portion 101 in every group is the curve or the broken line setting, in two sets of vortex portions 101 that are close to adjacent stator winding coil 2, have the clearance between the closest vortex portion 101 of stator winding coil 2 and the wall of stator winding coil 2 with stator winding coil 2, the vortex portion 101 that is closest to stator winding coil 2 does not contact with coil 2, so that cooling medium can flow through in the clearance, be convenient for simultaneously with coil 2 through the cooling medium flow return to in the cooling medium flow space of heat exchange, also be convenient for in cooling medium flow space's cooling medium flows into in stator winding's coil 2.
As shown in fig. 2-3 and 7-9, the flow disturbing part 101 is a flow disturbing column, the flow disturbing column is a columnar structure, and the cross-sectional shape of the flow disturbing column may be a circle, an ellipse, a square, a triangle, or a diamond, or other shapes, and is selected according to actual requirements, which is not specifically required here. The dimensions of the turbulence columns, such as diameter and height, are selected according to the dimensional structure of the slots of the stator core 3, and are not specifically required here.
The turbulence column and the slot wedge body 100 can be vertically arranged or obliquely intersected, selection is performed according to actual requirements, no specific requirement is made here, in the embodiment, the turbulence column and the slot wedge body 100 are preferably vertically arranged, the turbulence column and the slot wedge body 100 are fixedly connected, and the fixed connection mode is preferably integrally formed.
In a further optimized scheme, as shown in fig. 2 to 6, the slot wedge 1 further includes a shunting portion 102, the shunting portion 102 is disposed at any end of the slot wedge body 100, when the slot wedge 1 is installed, the shunting portion 102 corresponds to the oil spray opening 4 of the cooling medium spray device 5, and shunts the cooling medium sprayed to the shunting portion 102, so that most of the cooling medium is shunted into the slot of the stator core 3, and the cooling medium flows along the slot wedge body 100, thereby suppressing the flow rate of the cooling medium flowing out from the end of the stator core 3 where the shunting portion 102 is disposed, reasonably distributing the outflow rate of the cooling medium at two ends of the stator winding, and improving the uniformity of the temperature of the coil 2 of the stator winding. After being ejected from the oil ejection port 4, the cooling medium flows to the wedge body 100, is dispersed to the coils 2 on both sides under the blockage of the wedge body 100, and flows along the surface of the coils 2, and at the same time, the cooling medium ejected to the wedge body 100 flows along the surface of the wedge body 100, and under the action of the flow dividing portion 102, a small amount of the cooling medium flows to the end portion of the stator winding coil 2 corresponding to the flow dividing portion 102 along the flow dividing portion 102, flows along the shape of the end portion of the coil 2, and is divided to flow along different directions.
The shunting portion 102 is protruded on one side of the slot wedge body 100, the shunting portion 102 and the spoiler portion 101 are disposed on the same side of the slot wedge body 100, the shunting portion 102 is fixedly connected with the slot wedge body 100, and the fixed connection mode is preferably integrally formed. Under the action of the shunting part 102, most of the cooling medium sprayed from the oil spray opening 4 flows along the surface of the slot wedge body 100, and a small part of the cooling medium flows along the end part of the coil 2 of the stator winding, so that most of the cooling medium and the coil 2 of the stator winding are positioned in the in-slot part of the stator core 3 to be in contact with each other, and the stator winding is fully cooled.
The flow dividing part 102 comprises a platform part and a transition part, the platform part is connected with the transition part, the platform part and the transition part are sequentially arranged along the length direction of the slot wedge body 100, the platform part is flush with the end part of the slot wedge body 100, the transition part is of a curve structure, the surface of the transition part is concave towards the slot wedge body 100, the height of the transition part is lower than that of the platform part, the extending direction of the transition part is consistent with the flowing direction of the cooling medium flowing out of the oil nozzle 4, the surface of the transition part facing the oil nozzle 4 is approximately parallel to the plane formed by the flowing direction of the cooling medium sprayed out of the oil nozzle 4, so that the cooling medium is sprayed out of the oil nozzle 4 and is in contact with the upper surface of the transition part, a small part of the cooling medium is reflected under the blocking effect of the transition part and flows towards the direction of the platform part, the cooling medium flows through the platform part and flows along the end parts of two adjacent coils 2, and most, and thus flows over the surface of the wedge body 100.
The height of the platform part is selected according to the size structure in the slot of the stator core 3 and the size and arrangement of the spoiler 101, and is not specifically required here.
An oil-cooling flat wire motor comprises the oil-cooling flat wire motor heat dissipation structure.
The heat dissipation process of the oil cooling flat wire motor heat dissipation structure to the flat wire motor is as follows: after a stator winding is arranged on a stator core 3, a slot wedge provided with a flow disturbing part 101 and a flow dividing part 102 is inserted at a slot opening of each slot of the stator core 3, one side surface of a slot wedge body 100 facing a stator winding coil 2 is abutted with the coil 2, the flow disturbing part 101 is arranged in a cooling medium flowing space formed by the slot wedge body 100 and the two coils 2 in the slot, the flow dividing part 102 is configured to correspond to the position of an oil spray opening 4 of a cooling medium spraying device 5 of a motor, the spraying direction of the cooling medium from the oil spray opening 4 is approximately parallel to the extending direction of a transition part, after the cooling medium is sprayed from the oil spray opening 4, the cooling medium flows to the transition part, most of the cooling medium flows to the other end direction of the stator core 3 under the blocking effect of the transition part, and a small part of the cooling medium flows to the platform part; among the cooling media flowing to the other end of the stator core 3, a part of the cooling media is scattered to the surfaces of the coils 2 on both sides by the transition part and flows along the shape of the wire of the coil 2, and the part of the cooling media exchanges heat with the surfaces of the coils 2; a part of the cooling medium flows along the surface of the slot wedge body 100, and in the flowing process, the part of the cooling medium meets the blocking of the plurality of flow disturbing parts 101, under the blocking effect of each flow disturbing part 101, the part of the cooling medium is divided into a plurality of flow layers, and a plurality of flow routes are provided, meanwhile, after passing through each flow disturbing part 101, the cooling medium forms a small-area vortex behind the flow disturbing part 101, so that the cooling medium is changed into a turbulent flow state, and the turbulent flow state is kept to flow, because of the formed small-area vortex, the cooling medium positioned in the cooling medium flow space is dispersed to the surface of the coil 2, meanwhile, the cooling medium on the surface of the coil 2 is attached to the cooling medium flow space, the cooling medium on the two sides of the flow disturbing parts 101 is mixed after being disturbed, the cooling medium positioned on the surface of the coil 2 exchanges heat with the coil 2, so that the temperature of the part of the cooling, the temperature of the cooling medium in the cooling medium flowing space is low, the cooling medium with higher temperature is mixed with the cooling medium with lower temperature and then dispersedly flows to the surface of the coil 2 again, and then exchanges heat with the coil 2 again, the actions are repeated in the process that the cooling medium in the cooling medium flowing space flows to the other end of the stator core 3, compared with the prior art that the cooling medium only carries out laminar flow and does not carry out the mixing process of the cooling medium with higher temperature and the cooling medium with lower temperature, the heat dissipation capability of the motor is enhanced, the average temperature of the surface of each coil 2 is 83 ℃ after the cooling medium flowing in a turbulent flow state flows to the other end from one end of the stator core 3, and in the prior art, the average temperature of the surface of each coil 2 is 90 ℃ after the cooling medium flows through, the surface temperature of the coil 2 is obviously reduced, and the heat dissipation capacity of the motor is improved by 30%; the partial cooling medium that flows to platform portion flows along the cooling medium of the flow of platform portion and along coil 2's turn portion, flows to coil 2's inside, and then flows through whole coil 2, cools down coil 2 for stator winding's coil temperature uniformity is good. The presence of the small-area eddy current causes the cooling medium flowing in the cooling medium flow space to flow more toward the surface of the coil 2, thereby suppressing the flow rate of the cooling medium flowing out from the end of the coil 2.
Due to the arrangement of the shunting part 102, the cooling medium flowing out of the oil injection port 4 flows along the slot wedge body 100 mostly, and flows towards the platform part in a small part, so that the outflow of the cooling medium from the two ends of the slot is reasonably distributed, and the temperature consistency of the coil of the stator winding is good.
By adopting the technical scheme, the turbulence part is additionally arranged on the slot wedge of the flat wire concentrated winding motor to disturb the cooling medium flowing between the two coils in the slot, the cooling medium flows through the turbulence part and then generates a small-area vortex behind the turbulence part, the vortex mixes the cooling medium on the upper side and the lower side of the turbulence part after being disturbed, the high-temperature cooling medium on the surface of the coil and the low-temperature cooling medium in the middle of the slot are mixed and then flow back to the surface of the coil, so that the cooling medium flows through the gap between the two coils in a turbulence state, the convection heat exchange capability of the cooling medium and the stator winding coil is enhanced, the heat dissipation efficiency of the cooling medium on the coil is improved, the heat dissipation capability of the motor is improved, and the power density of the motor is improved; the cooling medium in the groove flows to be in a turbulent flow state, the heat convection capacity between the cooling medium and the coil is improved, the heat dissipation performance of the motor is improved, the outflow of the cooling medium at the two ends of the groove can be effectively controlled, the distribution is more reasonable, and the temperature consistency of the coil is improved; the split part is added on the slot wedge, the flow of the cooling medium flowing out from the oil injection port side is restrained, the outflow quantity of the cooling medium at two ends of the slot is reasonably distributed, and the consistency of the coil temperature is improved.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (11)
1. The utility model provides an oil-cooling flat wire motor heat radiation structure, includes the slot wedge, the slot wedge is pegged graft in the notch in stator core's groove, its characterized in that: the slot wedge comprises a slot wedge body and a flow disturbing part, and the flow disturbing part is arranged on one side surface of the slot wedge body;
the quantity of vortex portion is a plurality of, and is a plurality of vortex portion all locates same side of slot wedge body, and a plurality of vortex portion along the length direction of slot wedge body sets up, and coolant sprays in on the slot wedge body and along slot wedge body surface flow, the coolant that flows quilt vortex portion cuts apart into a plurality of flow layers, and vortex portion forms the small area vortex at the back so that coolant keeps the torrent state to flow.
2. The oil-cooled flat wire motor heat dissipation structure of claim 1, characterized in that: the plurality of flow disturbing parts are arranged in a space between adjacent stator winding coils in one slot of the stator core, the slot wedge body and the adjacent stator winding coils form a cooling medium flowing space, and the cooling medium flows in a turbulent state in the flowing space, so that the cooling medium in the cooling medium flowing space can be mixed with the cooling medium on the wall surface of the stator winding coil.
3. The oil-cooled flat wire motor heat dissipation structure of claim 2, characterized in that: in the plurality of spoiler portions, a gap is formed between the spoiler portion closest to the stator winding coil and the wall surface of the stator winding coil, so that a cooling medium can flow through the gap.
4. The oil-cooled flat wire motor heat dissipation structure according to any one of claims 1 to 3, characterized in that: the plurality of turbulence parts are arranged at intervals, and the plurality of turbulence parts are arranged in at least one group;
in each group, the adjacent turbulence parts are arranged in a staggered manner so that the plurality of turbulence parts in each group are arranged in a curve shape or a broken line shape, and cooling media are mixed after being disturbed by the turbulence parts;
or, in each group, the turbulence parts are linearly arranged, so that the cooling medium is mixed after being disturbed by the turbulence parts.
5. The oil-cooled flat wire motor heat dissipation structure of claim 4, characterized in that: in each group in the vortex portion, on horizontal direction, it is adjacent set up with horizontal clearance equidistant between the vortex portion, on longitudinal direction, it is adjacent set up with vertical clearance equidistant between the vortex portion.
6. The oil-cooled flat wire motor heat dissipation structure of any one of claims 1-3 and 5, wherein: the flow disturbing part is a flow disturbing column.
7. The oil-cooled flat wire motor heat dissipation structure of claim 6, characterized in that: the cross section of the turbulence column is circular, oval, rhombic or triangular.
8. The oil-cooled flat wire motor heat dissipation structure according to any one of claims 1 to 3, 5 and 7, characterized in that: the slot wedge further comprises a shunting part, the shunting part is arranged at any end of the slot wedge body, when the slot wedge is installed, the shunting part corresponds to an oil spray opening of the cooling medium spraying device, the cooling medium sprayed to the shunting part is shunted, and most of the cooling medium is shunted into the slot of the stator core, so that the cooling medium flows along the slot wedge body.
9. The oil-cooled flat wire motor heat dissipation structure of claim 8, wherein: the convex portion of reposition of redundant personnel is located on a side of slot wedge body, just reposition of redundant personnel with vortex portion locates same side of slot wedge body.
10. The oil-cooled flat wire motor heat dissipation structure of claim 8, wherein: the reposition of redundant personnel portion includes platform portion and transition portion, platform portion with the transition portion is connected, platform portion with the transition portion along the length direction of slot wedge body sets gradually, just platform portion with the tip parallel and level of slot wedge body, transition portion is the curve structure, the plane of transition portion concave to the slot wedge body.
11. The utility model provides an oil-cooling flat wire motor which characterized in that: a heat dissipating structure for an oil-cooled flat wire motor including an oil-cooled flat wire motor as claimed in any one of claims 1 to 10.
Priority Applications (1)
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| CN112769294B (en) | 2021-07-20 |
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Address after: Free House R&D Building, No. 69, West 11th Road, Tianjin Binhai New Area Pilot Free Trade Zone (Airport Economic Zone), 300308 Patentee after: BorgWarner Powertrain (Tianjin) Co.,Ltd. Address before: 300308 Building 1, block B, No. 1, Xishi Road, pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee before: Tianjin Songzheng Auto Parts Co.,Ltd. |
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