A water cooling system for casing and winding ends

Abstract

The present invention discloses a casing and a water-cooled cooling system for winding ends, comprising: a cooling circuit integrated with the winding potting, and the inlet and outlet of the cooling circuit are exposed outside the potting body; the first module is configured as a lead-out terminal winding and a first water path of the winding end; the first water path is arranged in a ring shape along the surface of the lead-out terminal winding; the second module is configured as an axial extension terminal winding and a second water path of the winding end; the second water path is arranged in a ring shape along the surface of the axial extension terminal winding; the third module is configured as a casing, and a third water path and a fourth water path in the casing; the third water path and the fourth water path are coiled in a spiral shape along the contour of the casing; the third water path is connected to the first water path through a flow channel; the fourth water path is connected to the second water path through a flow channel. The scheme is based on a modular winding end structure, and the motor structure is efficiently cooled as a whole by arranging a cooling circuit outside the winding end and connecting it to the casing cooling water path.

Description

Technical Field

[0001] The invention relates to the technical field of motor cooling, and in particular to a water-cooling system for a casing and a winding end. Background Art

[0002] At present, the commonly used cooling methods for automotive motors are air cooling and water cooling. The air cooling method has a simple structure and low cost, but the heat dissipation effect and efficiency are not high, and the reliability is poor. Although the water cooling method has a slightly higher cost, it has a significant cooling effect, uniform heat dissipation, low noise, strong environmental adaptability, and is suitable for motors with strict operating conditions. There are three main types of motor water cooling structures: casing water cooling structure, end cover water cooling structure, and shaft water cooling structure. The casing water cooling structure can be used alone, and the other two structures are mixed with the casing water cooling structure. Summary of the invention

[0003] The present invention provides a casing and winding end water cooling system, which solves the problems of poor heat dissipation effect of the motor and inconvenient processing of the cooling structure.

[0004] The technical solution of the present invention is: a casing and winding end water cooling system, comprising: a shaft extension end winding end cooling module, a lead wire end winding end cooling module and a casing cooling module. That is, the shaft extension end winding end cooling module is the first module, the lead wire end winding end cooling module is the second module, and the casing cooling module is the third module.

[0005] The cooling module for the end of the shaft extension winding and the cooling module for the end of the lead wire winding are composed of windings and cooling circuits corresponding to the ends. Specifically, the cooling module for the end of the shaft extension winding includes the shaft extension winding and a first water circuit; the cooling module for the end of the lead wire winding includes the lead wire winding and a second water circuit.

[0006] The electromagnetic wire components in each winding are arranged in an orderly and regular manner according to the motor design requirements, and the cooling circuit is wrapped around the corresponding end of the winding to form a circulating cooling. When the motor is packaged inside, the winding and the corresponding cooling circuit are packaged as one, and the inlet and outlet of the cooling circuit, the terminal and lead-out terminal of the winding are exposed outside the package.

[0007] The encapsulated lead-out winding end cooling module and the shaft extension winding end cooling module are assembled in the casing, and then connected with the casing module by water. Specifically, the casing cooling module includes the casing and the water path in the casing.

[0008] Preferably, the shaft extension end winding, the lead wire end winding and the electromagnetic wire in the iron core are connected correspondingly to form a coil power circuit.

[0009] Specifically, the shaft extension end winding end cooling module includes: the shaft extension end winding and a first water channel.

[0010] The first water path formed by winding a continuous flow channel includes: a first outer ring portion formed along the outer rotating surface of the winding at the shaft end, a first top ring portion formed along the end surface of the winding at the shaft end, and a first inner ring portion formed along the inner rotating surface of the winding at the shaft end.

[0011] The first outer ring portion, the first top ring portion, and the first inner ring portion are sequentially connected to form a one-way circulation circuit, and the first outer ring portion, the first top ring portion, and the first inner ring portion are all arranged in a single flow channel.

[0012] Preferably, the end of the first outer ring portion is folded up to transition to the inner rotating surface of the shaft extension end winding to form the first inner ring portion; the end of the first top ring portion is folded up to transition to the end surface of the shaft extension end winding to form the first top ring portion; and the first waterway inlet is arranged at the end of the first top ring portion.

[0013] Preferably, the starting end of the first outer ring portion is folded up to transition to the end surface of the axial extension end winding, and the first water path outlet is arranged on the starting end of the first outer ring portion; the first water path outlet is adjacent to the first water path inlet, both are located on the end surface of the axial extension end winding, and both extend axially.

[0014] The lead-out terminal winding end cooling module comprises: a lead-out terminal winding and a second water channel.

[0015] The second water path formed by the continuous flow channel comprises: a second outer ring portion formed around the outer rotating surface of the lead-out terminal winding, and a second top ring portion formed around the end surface of the lead-out terminal winding.

[0016] The second outer ring portion and the second top ring portion are connected to form a one-way flow circuit.

[0017] Preferably, the end of the second outer circle portion is folded up to transition to the end surface of the lead-out wire end winding to form a second top circle portion; the second top circle portion forms a concentrically coiled double flow channel arrangement on the end surface of the lead-out wire end winding; the starting end of the second outer circle portion is folded up to transition to the end surface of the lead-out wire end winding, and a second water path outlet is arranged at the starting end of the second outer circle portion.

[0018] Preferably, the second waterway inlet is arranged at the beginning of the second top ring portion; the second waterway outlet is adjacent to the second waterway inlet, both are located on the end surface of the axial extension end winding, and both extend along the axial direction.

[0019] The casing cooling module includes: a casing, a third water channel, and a fourth water channel. The third water channel and the fourth water channel are spirally wound along the inner wall contour of the casing. The third water channel and the fourth water channel are independent water channels that are not connected. The third water channel is close to the shaft extension end, so the third water channel is connected to the first water channel; the fourth water channel is close to the lead-out end, so the fourth water channel is connected to the second water channel.

[0020] Preferably, the third module includes a water inlet for receiving the coolant; the third module includes a water outlet for connecting the water inlet with the first water channel / the second water channel; the water channel between the water inlet and the water outlet does not interfere with the third water channel and the fourth water channel.

[0021] Specifically, a first water inlet is provided on the third waterway, especially on the side of the motor rotating surface, and a first water outlet is arranged on the end surface of the third waterway close to the shaft extension end. At the same time, a third waterway inlet and a third waterway outlet are arranged on the third waterway, the third waterway inlet is adjacent to the first water outlet, and the third waterway outlet is adjacent to the first water inlet, so as to facilitate the management and classification of waterway interfaces. The first water outlet is connected to the first waterway inlet through a separate first connecting waterway to achieve communication, and at the same time, the first waterway outlet is connected to the third waterway inlet through a separate second connecting waterway to achieve communication.

[0022] Therefore, when the third water channel is connected to the first water channel, the flow of the coolant passes through the first water inlet - the first water outlet - the first connecting water channel - the first water channel inlet - the first water channel - the first water channel outlet - the second connecting water channel - the third water channel inlet - the third water channel - the third water channel outlet. The cooling water circulates to form a cooling water channel from the casing to the shaft extension end winding and then back to the casing.

[0023] The third waterway and the fourth waterway are symmetrically arranged, so the fourth waterway inlet and the fourth waterway outlet are arranged on the fourth waterway, the fourth waterway inlet is adjacent to the second water outlet, and the fourth waterway outlet is adjacent to the second water inlet. The second water outlet is connected to the second waterway inlet through a separate third connecting waterway to achieve communication, and at the same time, the second waterway outlet is connected to the fourth waterway inlet through a separate fourth connecting waterway to achieve communication.

[0024] The specific flow order of the coolant is: second water inlet - second water outlet - third connecting water channel - second water channel inlet - second water channel - second water channel outlet - fourth connecting water channel - fourth water channel inlet - fourth water channel - fourth water channel outlet.

[0025] The advantages of the present invention are:

[0026] 1. Mixed cooling method of casing and winding end, good overall cooling effect of motor.

[0027] 2. The winding end cooling structure directly cools the winding end, and the cooling effect is good.

[0028] 3. The cooling water channel at the winding end has a modular structure and can be independently processed according to size requirements and then connected to the casing water channel, which is easy to process.

[0029] 4. After the winding end is potted, the motor has good insulation, and the winding end module can be in direct contact with the casing, further improving the heat dissipation effect

[0030] 5. Apply silicone coating on the outside of the winding module to delay the generation of condensation to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0032] Figure 1 It is a top schematic diagram of the cooling module of the winding end at the shaft extension end;

[0033] Figure 2 It is a bottom schematic diagram of the cooling module of the winding end at the shaft extension end;

[0034] Figure 3 It is a schematic diagram of the first water path wrapped around the winding at the shaft extension end;

[0035] Figure 4 is a schematic diagram of the first waterway;

[0036] Figure 5 It is a top schematic diagram of the cooling module of the lead-out terminal winding end;

[0037] Figure 6 The bottom schematic diagram of the lead-out terminal winding end cooling module;

[0038] Figure 7 It is a schematic diagram of the second water path wrapped around the lead-out terminal winding;

[0039] Figure 8 is a schematic diagram of the second waterway;

[0040] Fig. 9 is a schematic diagram of the third waterway and the fourth waterway;

[0041] Fig.10 The inlet / outlet position layout diagram of the third water channel on the casing cooling module;

[0042] Fig.11 The inlet / outlet position layout diagram of the fourth water channel on the casing cooling module;

[0043] Among them, 1. Shaft extension end winding end cooling module; 2. Casing cooling module; 21. Third water channel; 211. First water inlet; 212. First water outlet; 213. Third water channel inlet; 214. Third water channel outlet; 215. First connecting water channel; 216. Second connecting water channel; 22. Fourth water channel; 221. Second water inlet; 222. Second water outlet; 223. Fourth water channel inlet; 224. Fourth water channel outlet; 225. Third connecting water channel; 226. Fourth connecting water channel; 3. First water channel; 31. First water channel inlet; 32. First water channel outlet; 33, first outer ring; 34, first top ring; 35, first inner ring; 4, axial extension end winding; 41, axial extension end winding end; 42, axial extension end winding end connector; 5, lead-out wire end winding end cooling module; 6, second water channel; 61, second water channel inlet; 62, second water channel outlet; 63, second outer ring; 64, second top ring; 7, lead-out wire end winding; 71, lead-out wire end winding end; 72, lead-out wire end winding end connector; 8, three-phase lead-out wire; 9, second potting component; 10, first potting component. DETAILED DESCRIPTION

[0044] Embodiment 1:

[0045] The shaft extension end winding cooling module 1 comprises: a shaft extension end winding 4 and a first water channel 3 .

[0046] The first water channel 3 formed by winding a continuous flow channel includes a first outer ring portion 33 , a first top ring portion 34 , and a first inner ring portion 35 .

[0047] The first outer ring portion 33 is arranged in a ring shape along the outer rotating surface of the shaft extension end winding 4.

[0048] The first top ring portion 34 is arranged in a ring shape along the end surface of the axial extension end winding 4 .

[0049] The first inner ring portion 35 is arranged in a ring shape along the inner rotating surface of the shaft extension end winding 4.

[0050] The first outer ring portion 33 , the first top ring portion 34 , and the first inner ring portion 35 are sequentially connected to form a one-way circulation circuit, and the first outer ring portion 33 , the first top ring portion 34 , and the first inner ring portion 35 are all arranged in a single flow channel.

[0051] like Figure 4As shown, the end of the first outer ring portion 33 is folded up to transition to the inner rotating surface of the shaft extension end winding 4 to form the first inner ring portion 35; the end of the first top ring portion 34 is folded up to transition to the end surface of the shaft extension end winding 4 to form the first top ring portion 34; the end of the first top ring portion 34 is arranged with the first waterway inlet 31. The beginning of the first outer ring portion 33 is folded up to transition to the end surface of the shaft extension end winding 4, and the first waterway outlet 32 ​​is arranged at the beginning of the first outer ring portion 33; the first waterway outlet 32 ​​is adjacent to the first waterway inlet 31, both are located on the end surface of the shaft extension end winding, and both extend along the axial direction.

[0052] The lead-out terminal winding end cooling module 5 comprises: a lead-out terminal winding 7 and a second water channel 6 .

[0053] The second water channel 6 formed by winding a continuous flow channel includes a second outer ring portion 63 and a second top ring portion 64 .

[0054] The second outer ring portion 63 is arranged in a ring shape along the outer rotating surface of the lead-out terminal winding 7 .

[0055] The second top ring portion 64 is arranged in a ring shape along the end surface of the lead-out terminal winding 7 .

[0056] The second outer ring portion 63 and the second top ring portion 64 are connected to form a one-way flow circuit.

[0057] like Figure 6 As shown, the end of the second outer ring portion 63 is folded up to transition to the end surface of the lead-out terminal winding 7 to form a second top ring portion 64; the second top ring portion 64 forms a concentrically coiled double flow channel arrangement on the end surface of the lead-out terminal winding 7; the beginning of the second outer ring portion 63 is folded up to transition to the end surface of the lead-out terminal winding 7, and the second waterway outlet 62 is arranged on the beginning of the second outer ring portion 63. The second waterway inlet 61 is arranged on the beginning of the second top ring portion 64; the second waterway outlet 62 is adjacent to the second waterway inlet 61, both of which are located on the end surface of the axial extension end winding and both extend along the axial direction.

[0058] The casing cooling module includes: a casing, a third water channel 21, and a fourth water channel 22. The third water channel 21 and the fourth water channel 22 are spirally wound along the inner wall contour of the casing. The third water channel 21 and the fourth water channel 22 are independent water channels that are not connected. The third water channel 21 is close to the shaft extension end, so the third water channel 21 is connected to the first water channel 3; the fourth water channel 22 is close to the lead-out end, so the fourth water channel 22 is connected to the second water channel 6.

[0059] Specifically, a first water inlet 211 is provided on the third waterway 21, especially on the side of the motor rotating surface, and a first water outlet 212 is arranged on the end surface of the third waterway 21 close to the shaft extension end. At the same time, a third waterway inlet 213 and a third waterway outlet 214 are arranged on the third waterway 21, the third waterway inlet 213 is adjacent to the first water outlet 212, and the third waterway outlet 214 is adjacent to the first water inlet 211, so as to facilitate the management and classification of waterway interfaces. The first water outlet 212 is connected to the first waterway inlet 31 through a separate first connecting water 215 to achieve communication, and at the same time, the first waterway outlet 32 ​​is connected to the third waterway inlet 213 through a separate second connecting water 216 to achieve communication.

[0060] The specific flow sequence of the coolant is: first water inlet 211 - first water outlet 212 - first connecting water channel 215 - first water channel inlet 31 - first water channel 3 - first water channel outlet 32 ​​- second connecting water channel 216 - third water channel inlet 213 - third water channel 21 - third water channel outlet 214. The cooling water circulates to form a cooling water channel from the casing to the shaft extension end winding and then back to the casing.

[0061] The third waterway 21 and the fourth waterway 22 are symmetrically arranged, so the second water inlet 221, the second water outlet 222, the fourth waterway inlet 223 and the fourth waterway outlet 224 are arranged on the fourth waterway 22, the fourth waterway inlet 223 is adjacent to the second water outlet 222, and the fourth waterway outlet 224 is adjacent to the second water inlet 221. The second water outlet 222 is connected to the second waterway inlet 61 through a separate third connecting waterway 225 to achieve communication, and at the same time, the second waterway outlet 62 is connected to the fourth waterway inlet 223 through a separate fourth connecting waterway 226 to achieve communication.

[0062] The specific flow order of the coolant is: second water inlet 221 - second water outlet 222 - third connecting water channel 225 - second water channel inlet 61 - second water channel 6 - second water channel outlet 62 - fourth connecting water channel 226 - fourth water channel inlet 223 - fourth water channel 22 - fourth water channel outlet 221 .

[0063] Embodiment 2:

[0064] The motor of this scheme adopts a winding end cooling structure, places the cooling circuit at the end of the winding, and uses potting technology to fix the end winding and the cooling water circuit into one.

[0065] In the shaft extension end winding cooling module 1, the electromagnetic wire elements are arranged regularly in sequence according to the motor design requirements to form the shaft extension end winding 4, and the shaft extension end winding end 41 is formed on the shaft extension end winding 4. The shaft extension end winding end connector 42 is left at the tail end of each electromagnetic wire original in the shaft extension end winding end 41. The first water channel 3 is annularly wrapped around the inner and outer rotating sides of the shaft extension end winding 4, and the spliced ​​and assembled shaft extension end winding 4 and the first water channel 3 are potted to form a first potting component 2, leaving the first water channel inlet 31 and the first water channel outlet 32 ​​of the first water channel 3 outside the first potting component 2.

[0066] In the lead-out terminal winding end cooling module 5, the electromagnetic wire elements are arranged regularly in order according to the motor design requirements and correspond to the electromagnetic wires at the shaft extension end to form the lead-out terminal winding 7. The lead-out terminal winding end 71 is formed on the lead-out terminal winding 7. The tail end of each electromagnetic wire original in the lead-out terminal winding end 71 is left with a lead-out terminal winding end connector 72. The second water channel 6 is annularly wrapped around the outside of the lead-out terminal winding 7, and the assembled lead-out terminal winding 7 and the second water channel 6 are potted to form a second potting component 9, leaving the second water channel inlet 61, the second water channel outlet 62, and the three-phase lead wire 8 of the second water channel 6 outside the second potting component 9.

[0067] There are two annular water paths in the housing 12: the third water path 21 and the fourth water path 22. The rotating surface of the housing is reserved with: the first water inlet 211, the second water inlet 221, the third water path outlet 214, and the fourth water path outlet 224. The two axial ends of the housing are respectively reserved with: the first water inlet 212, the third water path inlet 213, the second water inlet 222, and the fourth water path inlet 223. The housing water path is connected to the winding end water path through the first connecting water path 215, the second connecting water path 216, the third connecting water path 225, and the fourth connecting water path 226 to form a loop.

[0068] The potted axial extension end winding end module 1 and the lead-out line end winding end module 5 are connected to the electromagnetic wire in the iron core to form a coil power circuit.

[0069] The electromagnetic wire element 4 can be a conductive electromagnetic element such as copper wire, aluminum wire, silver wire, etc.;

[0070] The electromagnetic wire element 4 can be a flat wire or a round wire;

[0071] The first potting component 10 and the second potting component 9 need to cover and wrap the winding end and the cooling circuit;

[0072] After potting, apply anti-condensation silicone coating on the outside of the potting parts;

[0073] During the operation of the motor, the temperature of the winding end is usually the highest due to the low air heat dissipation coefficient. Therefore, this solution is based on a modular winding end structure and achieves the purpose of directly cooling the winding end by setting a cooling circuit outside the winding end.

[0074] Embodiment 3:

[0075] The example of this solution is a 48-slot 8-pole motor winding wire. The cooling module 1 at the end of the shaft extension winding is composed of a first water channel 3 and a shaft extension winding 4. The cooling circuit is independently processed based on the size of the end winding and is annularly sleeved on the shaft extension winding 4. The first water channel 3 is composed of three annular water channels, which wrap the inside, outside and upper side of the shaft extension winding 4. After the first water channel 3 is assembled with the shaft extension winding 4, epoxy material is used for potting treatment, and the potting material is wrapped around the shaft extension winding 4 and the first water channel 3.

[0076] In the lead-out terminal winding end cooling module 5, the second water channel 6 is composed of three annular water channels. After being spliced ​​with the lead-out terminal winding 7, the second water channel 6 wraps the outer side and upper side of the lead-out terminal winding 7, and then performs potting treatment. After potting, an anti-condensation silicone coating is applied on the outer side of the potting component.

[0077] The winding end cooling circuit is connected to the casing water channel through a connecting water channel to form a casing and winding end mixed cooling water channel.

[0078] When the motor is running, coolant (cooling water, coolant, liquid cooling gas, etc.) is introduced into the inlet. The coolant passes through the annular water channel, takes away the heat from the winding end, and flows out from the outlet.

[0079] In addition, the epoxy material is in direct contact with the casing, and its thermal conductivity is higher than that of air. The end of the end winding directly conducts heat to the casing through the epoxy material, thereby improving the heat dissipation capacity of the motor.

[0080] The embodiments of the present invention are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A casing and winding end water cooling system, comprising: A cooling circuit integrated with the winding potting, with the inlet and outlet of the cooling circuit exposed outside the potting body; characterized in that: The first module is configured as a first water path of the lead-out terminal winding and the end of the winding; the first water path is arranged in a ring shape along the surface of the lead-out terminal winding; The second module is configured as a second water path of the shaft extension end winding and the end of the winding; the second water path is arranged in a ring shape along the surface of the shaft extension end winding; The third module is configured as a housing, and a third waterway and a fourth waterway in the housing; the third waterway and the fourth waterway are spirally wound along the outline of the housing; The third water channel is connected to the first water channel through a flow channel; the fourth water channel is connected to the second water channel through a flow channel; The first water path formed by winding a continuous flow channel comprises: a first outer ring portion formed along the outer rotating surface of the shaft extension end winding, a first top ring portion formed along the end surface of the shaft extension end winding, and a first inner ring portion formed along the inner rotating surface of the shaft extension end winding; the first outer ring portion, the first top ring portion, and the first inner ring portion are sequentially connected to form a one-way flow loop, the first water path inlet is arranged at the end of the first top ring portion, and the first water path outlet is arranged at the beginning of the first outer ring portion; The second water path formed by a continuous flow channel includes: a second outer ring portion formed along the outer rotating surface of the lead-out terminal winding, and a second top ring portion formed along the end surface of the lead-out terminal winding; the second outer ring portion and the second top ring portion are connected to form a one-way flow loop, a second water path inlet is arranged at the end of the second top ring portion, and a second water path outlet is arranged at the beginning of the second outer ring portion.

2. A casing and winding end water cooling system according to claim 1, characterized in that: The third module includes a water inlet for receiving the coolant; the third module includes a water outlet for connecting the water inlet with the first water channel / the second water channel; the water channel between the water inlet and the water outlet does not interfere with the third water channel and the fourth water channel.

3. A casing and winding end water cooling system according to claim 2, characterized in that: The end of the first outer ring portion is folded to transition to the inner turning surface of the shaft extension end winding to form the first inner ring portion; The end of the first top turn portion is folded up to transition to the end surface of the axial extension end winding to form the first top turn portion.

4. A casing and winding end water cooling system according to claim 1, characterized in that: The starting end of the first outer ring portion is folded up to transition to the end surface of the axial extension end winding; the first waterway outlet is adjacent to the first waterway inlet.

5. A casing and winding end water cooling system according to claim 3, characterized in that: The first outer ring portion, the first top ring portion, and the first inner ring portion are all arranged in a single flow channel.

6. A casing and winding end water cooling system according to claim 2 or 5, characterized in that: The end of the second outer ring portion is folded to transition to the end surface of the lead-out terminal winding to form the second top ring portion; The second top ring portion forms a concentrically coiled double flow channel arrangement on the end surface of the lead-out terminal winding; The starting end of the second outer loop portion is folded up to transition to the end surface of the lead-out terminal winding; The second waterway outlet is adjacent to the second waterway inlet.

7. A casing and winding end water cooling system according to claim 2, characterized in that: The shaft extension end winding, the lead wire end winding and the electromagnetic wire in the iron core are connected correspondingly to form a coil power circuit.

8. A casing and winding end water cooling system according to claim 2, characterized in that: The outside of the potting body is coated with an anti-condensation silicone coating.

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