CN216356261U

CN216356261U - Compound cooling motor casing of embedded water course and motor thereof

Info

Publication number: CN216356261U
Application number: CN202122005777.5U
Authority: CN
Inventors: 童飞遥; 喻泽文; 张梓梁; 钟运平
Original assignee: Wuhan Polytechnic Tongyu Xinyuan Power Co ltd
Current assignee: Wuhan Polytechnic Tongyu Xinyuan Power Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-04-19
Anticipated expiration: 2031-08-24

Abstract

The utility model provides a composite cooling motor shell with an embedded water channel, which comprises a stator core, a shell and a U-shaped water channel, wherein the stator core forms an inner ring of the shell, the shell forms an outer ring of the shell, the U-shaped water channel is positioned between the stator core and the shell, the outer ring of the stator core is provided with a plurality of inwards-concave arc-shaped grooves, the U-shaped water channel is embedded into the inwards-concave arc-shaped grooves, and the height of the outer side of the U-shaped water channel does not exceed the outer wall surface of the stator core; the casing suit is on stator core, and the internal face of casing and stator core's outer wall facial features are laminated. The structure of a stator iron core with an inwards concave arc-shaped groove and an independent U-shaped water channel is adopted, and a cooling water channel is formed by bending a thin-wall water pipe instead of being directly formed on a motor shell in the prior art; the water channel is directly embedded into the outer side of the stator core, so that a complex die and welding process are avoided, the process steps in the machining process can be reduced, the product yield is improved, and the product cost is reduced. Meanwhile, the heat transfer path is shortened, and the heat dissipation capacity of the motor is improved.

Description

Compound cooling motor casing of embedded water course and motor thereof

Technical Field

The utility model relates to the technical field of motors of automobiles, in particular to a composite cooling motor shell with an embedded water channel and a motor thereof.

Background

At present, cooling water channels of a water-cooled motor are inner water channels in a machine shell and mainly comprise a spiral water channel and a U-shaped water channel. The spiral water channel is formed by casting or assembling an inner water jacket shell and an outer water jacket shell, the U-shaped water channel is formed by adopting an extrusion model, and then the water channel is processed into a plurality of reciprocating U-shaped water channels by adopting a welding process. The U-shaped water channel casing is made of extrusion molding materials, so that the length of the casing can be adjusted, and the U-shaped water channel casing can adapt to motors with the same diameter series and different lengths.

The current technology for forming the spiral water channel comprises die-casting forming and assembling of an inner water jacket and an outer water jacket. For example, the CN105871106A adopts the die-casting and friction welding process, the die and the process are complex, and the yield is low; for example, in CN205407473U, the inner and outer water jackets are welded after being assembled, and both the inner and outer water jackets need to be formed by molds and also need to be welded in mass production, and the molds and the process are complex, and the yield is low.

Most of the U-shaped water channels are formed by processing and welding extruded sections. For example, in patent CN110666464A, a friction stir welding process is proposed, but in the processing of the casing, steps are still required to be processed inside the water channel of the casing, and then the casing is welded by using a friction welding process. In the welding process, welding defects are easy to occur, and the product quality and the yield are influenced. Meanwhile, in terms of process, rough machining is needed firstly, then welding is needed, finish machining is needed after welding, and the process is too complex and high in cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems of reducing process steps in the machining process and improving the product yield, and provides a composite cooling motor shell with an embedded water channel and a motor thereof aiming at the defects in the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a compound cooling motor casing of embedded water course which characterized in that: the stator core comprises a stator core forming an inner ring of a shell, a shell forming an outer ring of the shell and a U-shaped water channel positioned between the stator core and the shell, wherein the outer ring of the stator core is provided with a plurality of inwards-concave arc-shaped grooves, the U-shaped water channel is embedded into the inwards-concave arc-shaped grooves, and the height of the outer side of the U-shaped water channel does not exceed the outer wall surface of the stator core; the casing suit is on stator core, and the internal face of casing and stator core's outer wall facial features are laminated.

According to the technical scheme, the U-shaped water channel is formed by bending a section of thin-wall water pipe by adopting an integrated piece, and the head end and the tail end of the thin-wall water pipe are used as a water outlet and a water inlet.

According to the technical scheme, the U-shaped water channel is divided into a plurality of sections, each section is formed by bending a thin-wall water pipe, and the U-shaped water channels of two adjacent sections are welded to form a complete water channel with a water outlet and a water inlet.

According to the technical scheme, the width of the U-shaped water channel is smaller than that of the arc-shaped groove which is concave inwards of the stator core, and the thickness of the U-shaped water channel is smaller than that of the arc-shaped groove which is concave inwards of the stator core.

According to the technical scheme, a certain gap is formed among the outer wall surface of the stator core, the inner wall surface of the shell and the U-shaped water channel, and stator insulating paint is filled among the gaps.

According to the technical scheme, a plurality of groups of radiating fins are arranged on the outer wall surface of the shell at intervals, and the radiating fins are in wave lines.

According to the technical scheme, the stator core is formed by overlapping a plurality of iron core pieces, and the iron core pieces are welded by laser.

According to the technical scheme, the iron core plate is also provided with a W-shaped welding groove for welding.

An electric machine comprising a composite cooling machine housing with an embedded water channel as described above.

The utility model has the following beneficial effects:

1. the utility model adopts a structure of 'stator core with concave arc-shaped groove + independent U-shaped water channel', the cooling water channel is formed by bending a thin-wall water pipe, and the cooling water channel is not formed by directly arranging a motor shell in the prior art; by directly embedding the water channel into the outer side of the stator core, complex dies and welding processes are avoided, process steps in the machining process can be reduced, the finished product rate of products is improved, and the product cost is reduced; in addition, the heat transfer path is shortened, and the heat dissipation capacity of the motor is improved.

2. The gaps among the stator iron core, the water channel and the motor shell are filled with stator insulating paint for encapsulation, so that the heat conduction capability is improved, and the rigidity of the motor shell is also improved.

3. The heat dissipation fins on the outer surface of the shell are provided with wave-shaped auxiliary heat dissipation teeth, so that the motor can dissipate heat through the cooling water channel and can transfer heat to air through the shell, and the heat dissipation effect is improved.

Drawings

FIG. 1 is a radial cross-sectional view of a provided embodiment of the utility model;

FIG. 2 is a schematic structural diagram of a provided embodiment of the utility model;

fig. 3 is a schematic structural view of a stator core according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another embodiment of the present invention;

in the figure, 1, a stator core; 2. a housing; 3. a U-shaped water channel; 4. an inwardly concave arc-shaped slot; 5. heat dissipation fins; 6. a W-shaped solder groove.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 3, the composite cooling motor casing with embedded water channels provided by the utility model comprises a stator core 1 forming an inner ring of the casing, a casing 2 forming an outer ring of the casing, and a U-shaped water channel 3 positioned between the stator core and the casing. The stator core outer lane is equipped with the arc wall 4 of a plurality of indent, and in the arc wall of U type water course embedding indent, guaranteed certain magnitude of interference and rate of tension between U type water course and the stator core during the assembly, guaranteed water pipe inner wall and stator core in close contact with, do benefit to the heat conduction. The height of the outer side of the U-shaped water channel does not exceed the outer wall surface of the stator core; the casing suit is on stator core, and the internal face of casing and stator core's outer wall facial features are laminated. According to the embodiment, the water channel is directly embedded into the outer side of the stator core, so that complex dies and welding processes are avoided, the process steps in the machining process can be reduced, the yield of products is improved, and the cost of the products is reduced.

In some embodiments, the U-shaped water channel is formed by bending a section of thin-wall water pipe, and the head end and the tail end of the thin-wall water pipe are used as a water outlet and a water inlet. The assembly process of the stator core and the U-shaped water channel adopts pressure assembly or hot sleeve assembly.

In other embodiments, the U-shaped water channel is divided into a plurality of sections, each section is formed by bending a thin-wall water pipe, each section of the U-shaped water channel is installed on the stator core, and the U-shaped water channels of two adjacent sections are welded by laser to form a complete water channel with a water outlet and a water inlet. As shown in fig. 4, the U-shaped water channel is of a two-segment structure, and after the water channel is spliced in the concave arc-shaped groove of the stator core, the two water channels are connected into a whole by welding.

In some embodiments, the width of the U-shaped water channel is smaller than the width of the concave arc-shaped slot of the stator core, and the thickness of the U-shaped water channel is smaller than the thickness of the concave arc-shaped slot of the stator core; the U-shaped water channel is in clearance fit with the stator core. After the assembly of the shell, the stator core and the water channel is completed, stator insulating paint is filled among the concave outer wall surface of the stator core, the inner wall surface of the shell and the gap of the U-shaped water channel. The stator core is beneficial to heat conduction in the shell, has the effect of fixing the water channel, is beneficial to improving the rigidity of the stator core, the shell and the water pipe, and can effectively avoid the problem caused by vibration.

In some embodiments, the outer wall surface of the casing is provided with a plurality of groups of heat dissipation fins 5 at intervals, and the heat dissipation fins are provided with wave patterns capable of increasing the heat dissipation area. Stator core and casing adopt interference fit, and the protruding portion (the part at the arc wall both ends of indent) and the casing contact of stator core's lateral surface can give the casing with a wind heat transfer and dispel the heat.

In some embodiments, the stator core is manufactured into the core piece by a stamping process, then the core piece is laminated, and then the outer circular surface of the core is welded by laser to weld the core into a whole. Wherein, when the iron core sheet is punched, the inner groove is directly punched and formed, and in addition, the W-shaped welding groove 6 is punched and formed for welding and forming.

The working principle of the utility model is as follows: in the running process of the motor, heat generated by the winding is transferred to the stator core through contact, the stator core is directly transferred to the U-shaped water channel in contact, and flowing cooling water in the U-shaped water channel takes away the heat to play a role in cooling the motor. Meanwhile, a part of heat is conducted to the shell in a contact way through the convex part of the stator core, and the heat is conducted to the air through the radiating fins of the shell for radiating. The two heat dissipation paths act simultaneously to form a composite cooling heat dissipation mode.

The utility model also provides a motor which comprises the composite cooling motor shell with the embedded water channel.

The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.

Claims

1. The utility model provides a compound cooling motor casing of embedded water course which characterized in that: the stator core comprises a stator core forming an inner ring of a shell, a shell forming an outer ring of the shell and a U-shaped water channel positioned between the stator core and the shell, wherein the outer ring of the stator core is provided with a plurality of inwards-concave arc-shaped grooves, the U-shaped water channel is embedded into the inwards-concave arc-shaped grooves, and the height of the outer side of the U-shaped water channel does not exceed the outer wall surface of the stator core; the casing suit is on stator core, and the internal face of casing and stator core's outer wall facial features are laminated.

2. The channel-embedded composite cooling motor housing of claim 1, wherein: the U-shaped water channel is formed by bending a section of thin-wall water pipe by adopting an integrated piece, and the head end and the tail end of the thin-wall water pipe are used as a water outlet and a water inlet.

3. The channel-embedded composite cooling motor housing of claim 1, wherein: the U-shaped water channel is divided into a plurality of sections, each section is formed by bending a thin-wall water pipe, and the U-shaped water channels of two adjacent sections are welded to form a complete water channel with a water outlet and a water inlet.

4. The composite cooling motor housing with embedded water channels of any one of claims 1-3, wherein: the width of the U-shaped water channel is smaller than that of the arc-shaped groove which is concave inwards of the stator core, and the thickness of the U-shaped water channel is smaller than that of the arc-shaped groove which is concave inwards of the stator core.

5. The channel-embedded composite cooling motor housing of claim 4, wherein: a certain gap is formed among the outer wall surface of the stator core, the inner wall surface of the shell and the U-shaped water channel, and stator insulating paint is filled among the gaps.

6. The composite cooling motor housing with embedded water channels of any one of claims 1-3, wherein: the outer wall surface of the shell is provided with a plurality of groups of radiating fins at intervals, and the radiating fins are in wave lines.

7. The composite cooling motor housing with embedded water channels of any one of claims 1-3, wherein: the stator core is formed by overlapping a plurality of iron core pieces, and laser welding is adopted between the iron core pieces.

8. The channel-embedded composite cooling motor housing of claim 7, wherein: the iron core plate is also provided with a W-shaped welding groove for welding.

9. An electrical machine comprising a composite cooling machine housing with embedded water channels according to any one of claims 1 to 8.