A water-cooled motor shell with adjustable cooling water channel, motor and adjusting method

Abstract

This invention belongs to the field of electric vehicle electric drive assembly technology, specifically relating to a water-cooled motor housing with adjustable cooling channels, a motor, and an adjustment method. It includes an inner shell and an outer shell coaxially sleeved outside the inner shell, with the inner shell and outer shell connected, forming an annular sealed space between them. Multiple first mounting slots are arranged axially around the central axis of the outer surface of the inner shell, extending from one end of the annular sealed space to the other. A first water channel rib and multiple second water channel ribs are installed within each first mounting slot. The number of water channel ribs is less than or equal to the number of first mounting slots. Adjacent water channel ribs form water channel branches. The second water channel ribs form flow channels between two water channel branches on their sides, thereby forming cooling channels that run circumferentially along the annular sealed space. The first water channel ribs block the connection between two water channel branches on their sides, forming the beginning and end ends of the cooling channels.

Description

Technical Field

[0001] This invention belongs to the field of electric vehicle electric drive assembly technology, specifically relating to a water-cooled motor housing with adjustable cooling channels, a motor, and an adjustment method. Background Technology

[0002] As one of the core components of an electric vehicle's three-electric system (battery, motor, and electronic control), the motor's operating condition is greatly affected by temperature. On the one hand, high temperatures cause changes in the material properties of permanent magnet motors, leading to significant changes in core losses, winding copper losses, and rotor losses, resulting in decreased motor efficiency. On the other hand, excessively high motor temperatures can cause irreversible demagnetization of the permanent magnets and damage to the enameled wire insulation. Therefore, excellent heat dissipation is one of the key factors in enhancing product competitiveness and reliability.

[0003] Currently, water-cooled motors dissipate heat by forming cooling channels within the motor housing. Coolant flows through these channels, cooling the housing and carrying away the heat transferred from the motor stator to the housing. Properly designing the motor's cooling channels, reducing flow resistance within the channels, and increasing the contact between the coolant and the channels can further improve heat dissipation efficiency.

[0004] Currently, cooling water channel structures are mainly divided into U-shaped water channels and spiral water channels. For the relatively simple U-shaped water channel, the water channel is usually formed by casting or extrusion shell. If the water channel structure needs to be adjusted, the mold needs to be repaired. The repair cycle is usually 2 months and incurs corresponding costs. If the repair scale is too large, it may be necessary to re-open the mold, further increasing the development cycle and costs.

[0005] For complex spiral water channels, methods such as sand core casting are required to form the water channels. Sand core casting requires adding disposable sand cores to the mold, and the sand cores need to be added again for each casting. Therefore, the production consistency is worse than that of non-sand core casting samples. Furthermore, the addition of sand cores may cause product defects such as sand holes during shell processing. If the water channel structure needs to be adjusted, the shell with spiral water channels cannot be directly adjusted based on the existing shell. Instead, the adjusted sand cores need to be added to the mold and a new shell needs to be recast. If the adjustment of the water channel structure involves changes to the shell structure, the mold needs to be repaired or re-opened.

[0006] In summary, existing water-cooled motor housings cannot be directly adjusted when structural changes to their cooling channels are required. Instead, the housing must be recast, resulting in high development costs and long development cycles for adjusting the cooling channels of existing water-cooled motor housings. Furthermore, since mold repair or re-molding is often required before recasting, or the addition of adjusted sand cores to the mold, the development cycle and costs are further increased. Summary of the Invention

[0007] This invention provides a water-cooled motor housing with adjustable cooling channels, a motor, and an adjustment method. This addresses the technical problem of existing water-cooled motor housings where adjustments to the cooling channels cannot be made directly on the existing housing; the housing must be recast. This results in high development costs and long development cycles for adjusting the cooling channels of existing water-cooled motor housings. Furthermore, because recasting often requires mold repair or re-molding, or the addition of adjusted sand cores to the mold, the development cycle and costs are further increased.

[0008] The technical solution adopted in this invention is: a water-cooled motor housing with adjustable cooling channels, including an inner shell and an outer shell coaxially sleeved outside the inner shell, wherein the inner shell is connected to the outer shell and an annular sealing space is formed between the outer peripheral surface of the inner shell and the inner peripheral surface of the outer shell;

[0009] Multiple first mounting slots are arranged at intervals around the central axis on the outer circumferential surface of the inner shell. Each first mounting slot extends axially from one end of the annular sealing space to the other end. Multiple water channel ribs are arranged at intervals circumferentially within the annular sealing space. The number of water channel ribs is less than or equal to the number of the first mounting slots. The water channel ribs are installed in the first mounting slots, so that water channel branches are formed between adjacent water channel ribs. Each water channel rib includes one first water channel rib and multiple second water channel ribs. The second water channel ribs are used to form a flow channel between two water channel branches on both sides of them to connect the two water channel branches on both sides, thereby forming a cooling water channel running circumferentially along the annular sealing space. The first water channel ribs are used to block the connection between the two water channel branches on both sides of them to form the beginning and end ends of the cooling water channel.

[0010] By adjusting the number of the second waterway stiffeners, the number of the first mounting slots between two adjacent waterway stiffeners can be adjusted, thereby adjusting the flow area of ​​each waterway branch.

[0011] By adjusting the structure or installation position of the second water channel rib, the position of the flow passage between each water channel branch can be adjusted, thereby adjusting the connection position between each water channel branch and realizing the adjustment of the flow direction of the cooling water in each water channel branch.

[0012] In summary, when adjusting the cooling channels of the adjustable water-cooled motor housing, only the structure or installation position of the second channel rib plate needs to be adjusted to achieve the adjustment of the cooling channels. This solves the technical problem that existing water-cooled motor housings cannot be directly adjusted on the existing housing when structural adjustments to the cooling channels are required. The housing needs to be recast, resulting in high development costs and long development cycles for adjusting the cooling channels of existing water-cooled motor housings. Furthermore, since mold repair or re-molding is often required before recasting, or the addition of adjusted sand cores to the mold is also necessary, the development cycle and costs are further increased.

[0013] The phrase "the second waterway stiffener is used to form a flow passage between the two waterway branches on both sides" can be implemented in various ways, including but not limited to:

[0014] 1. The length of the second waterway rib is less than the length of the first mounting groove; by adjusting the installation position of the second waterway rib in the first mounting groove, one or two flow channels can be formed between the two waterway branches on both sides of the second waterway rib. This allows for adjustment of the installation position of the second waterway rib in the first mounting groove, such that the beginning of one of the two waterway branches on both sides of the second waterway rib is connected to the beginning of the other waterway branch, or the end of one waterway branch is connected to the end of the other waterway branch. The tail ends are connected, or the beginning end of one of the waterway branches is connected to the beginning end of another waterway branch, while the tail ends of one of the waterway branches are connected to the tail ends of another waterway branch; based on this, by adjusting the overall installation position of each of the second waterway ribs in the corresponding first mounting groove, the position of the flow channel between each waterway branch can be adjusted, thereby adjusting the connection position between two adjacent waterway branches, thus realizing the adjustment of the flow direction of the cooling water in each waterway branch; thereby realizing the adjustment of the cooling water channel.

[0015] 2. An overflow port is provided on the side of the second waterway rib plate. The overflow port is used to form an overflow channel between the two waterway branches on both sides of the second waterway rib plate to connect the two waterway branches on both sides of the second waterway rib plate.

[0016] Furthermore, the second waterway rib has an overflow port on its side to form an overflow channel between the two waterway branches on both sides, so as to connect the two waterway branches on both sides.

[0017] By adjusting the number of flow outlets on each of the second water channel ribs and the position of the flow outlets on each of the second water channel ribs, the position of the flow channel between each water channel branch can be adjusted, thereby adjusting the connection position between two adjacent water channel branches, thus realizing the adjustment of the flow direction of the cooling water in each water channel branch; thereby realizing the adjustment of the cooling water channel.

[0018] Furthermore, one end of the inner shell extends outward to form a first flange, and the other end of the inner shell is provided with a male stop. The end of the outer shell near the first flange abuts against the first flange and is fixedly connected to the first flange. The end of the outer shell away from the first flange extends inward to form a flange, and a female stop that mates with the male stop is provided on the inner circumferential surface of the flange. Through the engagement of the male stop and the female stop, the annular sealing space is formed between the outer circumferential surface of the inner shell and the inner circumferential surface of the outer shell, and the central axis of the outer shell and the central axis of the inner shell are coaxial.

[0019] Furthermore, a first annular seal is provided between the first flange and the end face of the housing near the first flange; a second annular seal is provided between the male stop and the female stop.

[0020] By setting the first annular seal and the second annular seal, the annular sealing space between the outer shell and the inner shell is further sealed to prevent cooling water leakage.

[0021] Furthermore, the first flange has blind holes on the side near the male stop, which are the same number and position as the first mounting grooves. The inner side of the blind hole mates with the outer side of the water channel rib plate, and the inner side of the blind hole communicates with the corresponding first mounting groove. The end of each water channel rib plate near the first flange is inserted into the corresponding blind hole, and the end of each water channel rib plate away from the first flange abuts against the flange. This presses each water channel rib plate between the flange and the bottom of the blind hole.

[0022] Through the above technical solution, the water-cooled motor housing with adjustable cooling channels is assembled. When the male stop and the female stop are engaged, each of the water channel ribs is pressed between the flange and the bottom of the blind hole, so that each of the water channel ribs is axially interference-fitted between the flange and the bottom of the blind hole, thereby improving the stability of each of the water channel ribs after the water-cooled motor housing with adjustable cooling channels is assembled, and preventing each of the water channel ribs from vibrating during the operation of the cooling channels.

[0023] Meanwhile, since the inner side of the blind hole matches the outer side of the waterway rib plate, it is convenient to fix the waterway rib plate when installing it.

[0024] Furthermore, the outer casing extends outward from one end near the first flange to form a second flange, which abuts against the first flange and is fixedly connected to the first flange.

[0025] Furthermore, the inner circumferential surface of the outer shell is provided with a second mounting groove that is the same number and position as the first mounting groove. The second mounting grooves all extend axially from one end of the annular sealing space to the other end. The bottom end of the water channel rib is installed in the first mounting groove, and the top end of the water channel rib is installed in the corresponding second mounting groove.

[0026] By setting the second mounting groove and installing the bottom end of the water channel rib plate in the first mounting groove and the top end of the water channel rib plate in the corresponding second mounting groove, the stability of each water channel rib plate after the adjustable water-cooled motor housing of the cooling water channel is improved, and vibration of each water channel rib plate during the operation of the cooling water channel is avoided.

[0027] Furthermore, the radial cross-sections of both the first mounting groove and the second mounting groove are in the shape of an isosceles trapezoid, and both the first mounting groove and the second mounting groove are recessed inward from the groove opening towards the groove bottom.

[0028] By setting the radial cross-sections of both the first mounting groove and the second mounting groove to an isosceles trapezoidal shape, and by making both the first mounting groove and the second mounting groove recessed inward from the groove opening toward the groove bottom, the first mounting groove and the second mounting groove can assist in guiding the waterway rib plate during assembly.

[0029] The present invention also provides an electric motor, comprising a water-cooled motor housing with variable cooling channels according to the present invention, a stator, a rotor, and a rotor shaft installed within the water-cooled motor housing with variable cooling channels.

[0030] Based on the water-cooled motor housing with variable cooling channels provided by the present invention, the present invention also provides a method for adjusting the cooling channels, comprising:

[0031] Assemble the inner shell and the outer shell, and arrange multiple water channel ribs circumferentially between the inner shell and the outer shell; so that multiple water channel branches are formed in the annular sealed space, thereby forming the cooling water channel running circumferentially along the annular sealed space, and adjust the flow area of ​​each water channel branch.

[0032] By adjusting the reinforcing ribs of each of the second water channels, the position of the flow passage between each of the water channel branches is adjusted, thereby adjusting the connection position between each of the water channel branches, thus achieving the adjustment of the flow direction of the cooling water in each of the water channel branches; thereby achieving the adjustment of the cooling water channel.

[0033] Furthermore, the method for adjusting the flow area of ​​each of the waterway branches includes: adjusting the number of the second waterway stiffeners to adjust the number of the first mounting slots between two adjacent waterway stiffeners, thereby adjusting the flow area of ​​each of the waterway branches.

[0034] Furthermore, the method for adjusting each of the second water channel stiffeners includes: by adjusting the number of flow outlets on the second water channel stiffeners and the opening position of the flow outlets, the position of the flow passage between each of the water channel branches can be adjusted, thereby adjusting the connection position between two adjacent water channel branches, thereby realizing the adjustment of the flow direction of the cooling water in each of the water channel branches; thereby realizing the adjustment of the cooling water channel. Attached Figure Description

[0035] Figure 1 This is a perspective view of the water-cooled motor housing with variable cooling channels in the embodiment;

[0036] Figure 2 This is a schematic diagram of the assembly structure of the inner shell and the waterway stiffener in the embodiment;

[0037] Figure 3 This is a schematic diagram of the outer shell structure in the embodiment;

[0038] Figure 4 This is a schematic diagram of the radial cross-section of the water-cooled motor housing with variable cooling channels in the embodiment.

[0039] Figure 5 This is a schematic diagram of the axial cross-sectional structure of the water-cooled motor housing with variable cooling channels in the embodiment;

[0040] Figure 6 This is a three-dimensional schematic diagram of the first waterway stiffener in the embodiment;

[0041] Figure 7 This is a three-dimensional schematic diagram of the second waterway stiffener in the embodiment;

[0042] Figure 8 This is a schematic diagram of the assembly of the waterway stiffener and inner shell in the first adjustment method of the embodiment;

[0043] Figure 9 This is a schematic diagram of the cooling water flow direction in the cooling water channel of the first adjustment method in the embodiment;

[0044] Figure 10This is a schematic diagram of the assembly of the waterway stiffener and inner shell in the second adjustment method embodiment;

[0045] Figure 11 This is a schematic diagram of the cooling water flow direction in the cooling water channel of the second adjustment method in the embodiment;

[0046] Figure 12 This is a schematic diagram of the assembly of the waterway stiffener and inner shell in the third adjustment method of the embodiment;

[0047] Figure 13 This is a schematic diagram of the cooling water flow direction in the cooling water channel of adjustment method three in the embodiment;

[0048] Wherein, 1—outer shell, 2—inner shell, 3—waterway stiffener, 4—first annular seal, 5—second annular seal;

[0049] 11—Second mounting groove; 12—Flange; 13—Female stop; 14—Second flange;

[0050] 21—First mounting groove, 22—First flange, 23—Male stop, 24—Blind hole;

[0051] 31—First waterway reinforcing plate, 32—Second waterway reinforcing plate;

[0052] 321—Flow port. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings:

[0054] Example:

[0055] like Figures 1 to 4 As shown, this embodiment provides a water-cooled motor housing with adjustable cooling channels, including an inner shell 2 and an outer shell 1 coaxially sleeved outside the inner shell 2. The inner shell 2 is connected to the outer shell 1, and an annular sealing space is formed between the outer peripheral surface of the inner shell 2 and the inner peripheral surface of the outer shell 1.

[0056] Multiple first mounting grooves 21 are arranged at intervals around the central axis on the outer peripheral surface of the inner shell 2 (preferably, in this embodiment, multiple first mounting grooves 21 are evenly distributed around the central axis on the outer peripheral surface of the inner shell 2). The first mounting grooves 21 extend axially from one end of the annular sealing space to the other end. Multiple water channel ribs 3 are arranged at intervals along the circumference in the annular sealing space. The number of water channel ribs 3 is less than or equal to the number of first mounting grooves 21. The water channel ribs 3 are installed in the first mounting grooves 21 so that water channel branches are formed between adjacent water channel ribs 3.

[0057] like Figure 2 , Figure 6 and Figure 7As shown, the water channel stiffener 3 includes a first water channel stiffener 31 and multiple second water channel stiffeners 32. The second water channel stiffener 32 is used to form a flow passage between two water channel branches on both sides to connect the two water channel branches on both sides, thereby forming a cooling water channel running circumferentially along the annular sealed space. The first water channel stiffener 31 is used to block the connection between the two water channel branches on both sides to form the beginning and end ends of the cooling water channel.

[0058] The flow area of ​​each waterway branch can be adjusted by adjusting the number of second waterway stiffeners 32 to adjust the number of first mounting slots 21 between two adjacent waterway stiffeners 3.

[0059] In this way, by adjusting the structure or installation position of the second water channel stiffener 32, the position of the flow passage between each water channel branch can be adjusted, thereby adjusting the connection position between each water channel branch and realizing the adjustment of the flow direction of cooling water in each water channel branch.

[0060] In summary, when adjusting the cooling channels of an adjustable water-cooled motor housing, only the structure or installation position of the second channel rib 32 needs to be adjusted to achieve the adjustment of the cooling channels. This solves the technical problem that existing water-cooled motor housings cannot be directly adjusted on the existing housing when structural adjustments to the cooling channels are required. The housing needs to be recast, resulting in high development costs and long development cycles for adjusting the cooling channels of existing water-cooled motor housings. Furthermore, since mold repair or re-molding is often required before recasting, or the addition of adjusted sand cores to the mold is also necessary, the development cycle and costs are further increased.

[0061] The "second waterway stiffener 32 is used to form a flow passage between the two waterway branches on both sides" can be implemented in various ways, including but not limited to:

[0062] 1. The length of the second waterway rib plate 32 is less than the length of the first mounting groove 21. By adjusting the installation position of the second waterway rib plate 32 in the first mounting groove 21, one or two flow channels can be formed between the two waterway branches on both sides of the second waterway rib plate 32. Furthermore, by adjusting the installation position of the second waterway rib plate 32 in the first mounting groove 21, one of the two waterway branches on both sides of the second waterway rib plate 32 can be connected at its beginning to the beginning of the other waterway branch, or the end of one waterway branch can be connected to the end of the other waterway branch. The ends of the branch channels are connected, or the beginning of one waterway branch channel is connected to the beginning of another waterway branch channel, while the end of one waterway branch channel is connected to the end of another waterway branch channel. Based on this, by adjusting the installation position of each second waterway rib plate 32 in the corresponding first installation groove 21, the position of the flow passage between each waterway branch channel can be adjusted, thereby adjusting the connection position between two adjacent waterway branches channel, thus realizing the adjustment of the flow direction of cooling water in each waterway branch channel channel; thereby realizing the adjustment of the cooling water channel.

[0063] 2. An overflow port 321 is opened on the side of the second waterway stiffener 32. The overflow port 321 is used to form an overflow channel between the two waterway branches on both sides to connect the two waterway branches on both sides.

[0064] Preferably, in this embodiment, the side of the second waterway rib 32 is provided with an overflow port 321 to form an overflow channel between the two waterway branches on both sides, so as to connect the two waterway branches on both sides.

[0065] By adjusting the number of flow outlets 321 opened on each second water channel rib plate 32 and the opening position of the flow outlets 321 on each second water channel rib plate 32, the position of the flow passage between each water channel branch can be adjusted, thereby adjusting the connection position between two adjacent water channel branches, thus realizing the adjustment of the flow direction of cooling water in each water channel branch; thereby realizing the adjustment of the cooling water channel.

[0066] The number of flow outlets 321 and their positions on the second water channel rib plate 32 can both be adjusted (that is, the number of flow outlets 321 on the second water channel rib plate 32 and their positions on the second water channel rib plate 32 are set according to the actual needs of cooling water circuit adjustment). Figure 7 The second waterway stiffener 32 shown is only one configuration and does not constrain the number of flow outlets 321 on the second waterway stiffener 32 or the location of the flow outlets 321 on the second waterway stiffener 32.

[0067] like Figure 2 , Figure 4 and Figure 5As shown, one end of the inner shell 2 extends outward to form a first flange 22, and the other end of the inner shell 2 is provided with a male stop 23. The end of the outer shell 1 near the first flange 22 abuts against the first flange 22 and is fixedly connected to the first flange 22. The end of the outer shell 1 away from the first flange 22 extends inward to form a flange 12. A female stop 13 that mates with the male stop 23 is provided on the inner circumferential surface of the flange 12. Through the cooperation of the male stop 23 and the female stop 13, an annular sealing space is formed between the outer circumferential surface of the inner shell 2 and the inner circumferential surface of the outer shell 1, and the central axis of the outer shell 1 and the central axis of the inner shell 2 are coaxial.

[0068] like Figure 5 As shown, a first annular seal 4 is provided between the end face of the first flange 22 and the end face of the outer shell 1 near the first flange 22; a second annular seal 5 is provided between the male stop 23 and the female stop 13.

[0069] By setting the first annular seal 4 and the second annular seal 5, the annular sealing space between the outer shell 1 and the inner shell 2 is further sealed to prevent cooling water leakage.

[0070] like Figure 2 and Figure 5 As shown, the first flange 22 has blind holes 24 on the side near the male stop 23, which are the same number and position as the first mounting groove 21. The inner side of the blind hole 24 matches the outer side of the water channel rib plate 3. The inner side of the blind hole 24 communicates with the corresponding first mounting groove 21. The end of each water channel rib plate 3 near the first flange 22 is inserted into the corresponding blind hole 24, and the end of each water channel rib plate 3 away from the first flange 22 abuts against the flange 12. This makes each water channel rib plate 3 pressed between the flange 12 and the bottom of the blind hole 24.

[0071] Through the above technical solution, the water-cooled motor housing with adjustable cooling channels is assembled. When the male stop 23 and the female stop 13 are engaged, each water channel stiffener 3 is pressed between the flange 12 and the bottom of the blind hole 24, so that each water channel stiffener 3 has an axial interference fit between the flange 12 and the bottom of the blind hole 24, thereby improving the stability of each water channel stiffener 3 after the water-cooled motor housing with adjustable cooling channels is assembled, and avoiding vibration of each water channel stiffener 3 during the operation of the cooling channels.

[0072] Meanwhile, since the inner side of the blind hole 24 matches the outer side of the water channel rib plate 3, it is convenient to fix the water channel rib plate 3 when installing it.

[0073] like Figure 3 and Figure 5 As shown, the outer casing 1 extends outward from one end near the first flange 22 to form a second flange 14, which abuts against the first flange 22 and is fixedly connected to the first flange 22.

[0074] like Figure 3 and Figure 4 As shown, the inner circumferential surface of the outer shell 1 is provided with the same number of second mounting grooves 11 as the first mounting grooves 21 and corresponding in position. The second mounting grooves 11 all extend axially from one end of the annular sealing space to the other end. The bottom end of the water channel rib plate 3 is installed in the first mounting groove 21, and the top end of the water channel rib plate 3 is installed in the corresponding second mounting groove 11.

[0075] By setting a second mounting groove 11 and installing the bottom end of the water channel stiffener 3 in the first mounting groove 21 and the top end of the water channel stiffener 3 in the corresponding second mounting groove 11, the stability of each water channel stiffener 3 after the water-cooled motor housing with adjustable cooling water channel is improved, and vibration of each water channel stiffener 3 during the operation of the cooling water channel is avoided.

[0076] The inner surface of the blind hole 24 is connected to the corresponding second mounting groove 21.

[0077] like Figure 4 As shown, the radial cross-sections of the first mounting groove 21 and the second mounting groove 11 are both isosceles trapezoidal in shape, and both the first mounting groove 21 and the second mounting groove 11 are recessed inward from the groove opening towards the groove bottom.

[0078] By setting the radial cross-sections of the first mounting groove 21 and the second mounting groove 11 to an isosceles trapezoidal shape, and by making the first mounting groove 21 and the second mounting groove 11 both inward along the groove opening toward the groove bottom, the first mounting groove 21 and the second mounting groove 11 can assist in guiding the waterway rib plate 3 when it is assembled.

[0079] Based on the water-cooled motor housing with variable cooling channels provided in this embodiment, this embodiment also provides a motor, including the water-cooled motor housing with variable cooling channels provided in this embodiment, a stator, a rotor and a rotor shaft installed in the water-cooled motor housing with variable cooling channels.

[0080] Based on the water-cooled motor housing with variable cooling channels provided in this embodiment, this embodiment also provides a method for adjusting the cooling channels, including:

[0081] Assemble the inner shell 2 and the outer shell 1, and arrange multiple water channel ribs 3 circumferentially between the inner shell 2 and the outer shell 1; so that multiple water channel branches are formed in the annular sealed space, thereby forming a cooling water channel running circumferentially along the annular sealed space, and adjust the flow area of ​​each water channel branch.

[0082] By adjusting the reinforcing plates 32 of each second water channel, the position of the flow passage between each water channel branch is adjusted, thereby adjusting the connection position between each water channel branch, thus achieving the adjustment of the flow direction of cooling water in each water channel branch; and thus achieving the adjustment of the cooling water channel.

[0083] The method for adjusting the flow area of ​​each waterway branch includes: adjusting the number of second waterway stiffeners 32 to adjust the number of first mounting slots 21 between two adjacent waterway stiffeners 3, thereby adjusting the flow area of ​​each waterway branch.

[0084] The method for adjusting each second water channel stiffener 32 includes: by adjusting the number and position of the flow outlets 321 on the second water channel stiffener 32, the position of the flow passage between each water channel branch can be adjusted, thereby adjusting the connection position between two adjacent water channel branches, thereby adjusting the flow direction of cooling water in each water channel branch; thus achieving the adjustment of the cooling water channel.

[0085] The following are specific methods for adjusting the cooling water channels using the variable cooling water channel water-cooled motor housing provided in this embodiment:

[0086] Adjustment method 1:

[0087] like Figure 8 As shown, only one flow outlet 321 is opened on each of the second waterway stiffeners 32;

[0088] In any two adjacent second water channel ribs 32, the opening position of the flow port 321 of one second water channel rib 32 is close to one end of the axial direction of the second water channel rib 32, and the opening position of the flow port of the other second water channel rib 32 is close to the other end of the axial direction of the second water channel rib 32; the water channel branch adjacent to one side of the first water channel rib 31 is connected to other water channel branches in sequence until it is connected to the water channel branch adjacent to the other side of the first water channel rib 31 to form a cooling water channel and form the beginning and end ends of the cooling water channel; an inlet and an outlet are opened on the outer shell 1; the inlet is connected to the beginning end of the cooling water channel, and the outlet is connected to the end end of the cooling water channel.

[0089] In practical applications, the cooling channels adjusted by this method are suitable for flat wire motors. Due to current technological limitations, the winding height at the stator welding end is higher than that at the stator insertion end, resulting in higher heat generation at the stator welding end. When selecting motor windings, the maximum temperature limit of the winding material must be considered. Therefore, when considering the arrangement of cooling channels in the flat wire motor housing, the arrangement of these channels must ensure that the cooling efficiency of the coolant at the stator welding end is higher than that at the stator insertion end. This allows the cooling channels to effectively balance the winding temperatures at the stator welding end and the stator insertion end, preventing excessive temperature differences between the two ends. This facilitates the selection of winding materials with lower temperature limits, thereby reducing costs.

[0090] like Figure 9As shown, the cooling channel obtained by the above adjustment method allows the coolant to flow axially from the welded end of the stator to the stator terminal, then turn at the end and flow axially from the terminal to the welded end again. This process repeats. As the coolant continuously carries away the heat generated by the stator assembly in the channel, the temperature of the coolant gradually increases along the forward direction. During each reciprocating flow, the coolant first exchanges heat with the welded end and then with the terminal, resulting in a better cooling effect on the welded end than on the terminal. Therefore, the variable cooling channel of the water-cooled motor housing obtained by the above adjustment method can effectively balance the winding temperature of the welded end and the terminal of the stator in the flat wire motor.

[0091] Adjustment method two:

[0092] like Figure 10 As shown, two flow ports 32 are provided on each of the two second waterway stiffeners 32 adjacent to the first waterway stiffener 31; and in any two adjacent second waterway stiffeners 32, one of the second waterway stiffeners 32 is provided with two flow ports 321, and the other second waterway stiffener 32 is provided with one flow port 321.

[0093] On a second waterway rib plate 32 with two flow outlets 321, one flow outlet 321 is located near one end of the second waterway rib plate in the axial direction, and the other flow outlet 321 is located near the other end of the second waterway rib plate in the axial direction; on a second waterway rib plate 32 with one flow outlet 321, the flow outlet 321 is located in the middle of the second waterway rib plate 32.

[0094] The number of second waterway stiffeners 32 is an odd number of not less than 3;

[0095] An inlet and an outlet are provided on the outer casing 1; the inlet is connected to the middle of the waterway branch adjacent to one side of the first waterway rib 31; the outlet is connected to the middle of the waterway branch adjacent to the other side of the first waterway rib 31.

[0096] In practical applications, the cooling channels adjusted by this method are suitable for round wire motors. Since the stator output and non-output winding heights of current round wire motors are almost the same, the heat generation at the output and non-output ends of the stator is also almost the same. Therefore, when considering the arrangement of the cooling channels in the housing of the round wire motor, the arrangement of the cooling channels needs to ensure that the cooling efficiency of the coolant on the output and non-output ends of the stator is the same. This allows the cooling channels to effectively balance the winding temperatures at the output and non-output ends of the stator, preventing the temperature difference between the two ends from being too large. This facilitates the selection of winding materials with lower temperature limits, thereby reducing costs.

[0097] like Figure 11 As shown, the cooling water channel obtained by the above-mentioned adjustment method two allows the coolant to enter the housing from the middle of the motor and flow axially to the output end and non-output end of the stator respectively. After turning at the end, it flows axially from the end back to the middle of the motor and repeats this process, so that the cooling efficiency of the coolant on the output end and non-output end of the stator is the same. Therefore, the water-cooled motor housing with variable cooling water channel obtained by the above-mentioned adjustment method two can effectively balance the winding temperature of the output end and non-output end of the stator in the circular wire motor.

[0098] Adjustment method three:

[0099] like Figure 12 and Figure 13 As shown, in adjustment method three, the arrangement of the flow outlet 321 on the second water channel rib 32 is the same as in adjustment method one, and the resulting cooling water channel structure is also similar. The difference is that, compared to adjustment method one, adjustment method three reduces the number of second water channel ribs 32 (that is, increases the number of first mounting slots 21 between two adjacent water channel ribs 3), making the width of each water channel branch in adjustment method three larger than the width of each water channel branch in adjustment method one. Consequently, the flow area of ​​each water channel branch in adjustment method three is larger than that of each water channel branch in adjustment method one. For the cooling water channel of the motor, if the flow area of ​​the water channel is too small, the flow resistance will increase, and the cooling effect will deteriorate; if the flow area of ​​the water channel is too large, the coolant will turbulent, which will also deteriorate the cooling effect.

[0100] Therefore, by using the above-mentioned adjustment methods one and three, and combining them with simulation experiments, it is possible to select an optimal result between the increased flow resistance caused by an excessively small flow area of ​​the water channel and the turbulent flow of the coolant caused by an excessively large flow area of ​​the water channel, thereby optimizing the cooling effect.

[0101] The water-cooled motor housing, motor, and adjustment method with adjustable cooling channels provided by the present invention have at least the following technical effects or advantages:

[0102] 1. When adjusting the cooling channels of the water-cooled motor housing with adjustable cooling channels provided by the present invention, only the structure or installation position of the second water channel rib plate 32 needs to be adjusted to achieve the adjustment of the cooling channels. This solves the technical problem that when the existing water-cooled motor housing needs to adjust its cooling channels, it is impossible to directly adjust it on the existing housing. The housing needs to be recast, which results in high development costs and long development cycles for adjusting the cooling channels of the existing water-cooled motor housing. Furthermore, since the mold often needs to be repaired or re-opened before recasting, or the adjusted sand core needs to be added to the mold, the development cycle and costs are further increased.

[0103] 2. By adjusting the number of flow outlets 321 opened on each second water channel rib plate 32 and the opening position of the flow outlets 321 on each second water channel rib plate 32, the position of the flow passage between each water channel branch can be adjusted, thereby adjusting the connection position between two adjacent water channel branches, thus realizing the adjustment of the flow direction of cooling water in each water channel branch; thereby realizing the adjustment of the cooling water channel.

[0104] 3. By setting the first annular seal 4 and the second annular seal 5, the annular sealing space between the outer shell 1 and the inner shell 2 is further sealed to prevent cooling water leakage.

[0105] 4. By assembling the water-cooled motor housing with adjustable cooling channels, when the male stop 23 and the female stop 13 are engaged, each water channel stiffener 3 is pressed between the flange 12 and the bottom of the blind hole 24, so that each water channel stiffener 3 has an axial interference fit between the flange 12 and the bottom of the blind hole 24, thereby improving the stability of each water channel stiffener 3 after the water-cooled motor housing with adjustable cooling channels is assembled, and preventing each water channel stiffener 3 from vibrating during the operation of the cooling channels.

[0106] 5. By setting a second mounting groove 11 and installing the bottom end of the water channel stiffener 3 in the first mounting groove 21 and the top end of the water channel stiffener 3 in the corresponding second mounting groove 11, the stability of each water channel stiffener 3 after the water-cooled motor housing with adjustable cooling water channel is improved, and vibration of each water channel stiffener 3 during the operation of the cooling water channel is avoided.

[0107] 6. By setting the radial cross-section of the first mounting groove 21 and the second mounting groove 11 to an isosceles trapezoidal shape, and by making the first mounting groove 21 and the second mounting groove 11 both inward along the groove opening towards the groove bottom, the first mounting groove 21 and the second mounting groove 11 can assist in guiding the waterway rib plate 3 when it is assembled.

[0108] 7. By adjusting the number of second waterway stiffeners 32, the number of first mounting slots 21 between two adjacent waterway stiffeners 3 can be adjusted, thereby adjusting the flow area of ​​each waterway branch.

[0109] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. A water-cooled motor housing with adjustable cooling channels, characterized in that: It includes an inner shell and an outer shell coaxially sleeved outside the inner shell, the inner shell and the outer shell being connected, and forming an annular sealed space between the outer peripheral surface of the inner shell and the inner peripheral surface of the outer shell; Multiple first mounting slots are arranged at intervals around the central axis on the outer circumferential surface of the inner shell. Each first mounting slot extends axially from one end of the annular sealing space to the other end. Multiple water channel ribs are arranged at intervals circumferentially within the annular sealing space. The number of water channel ribs is less than or equal to the number of the first mounting slots. The water channel ribs are installed in the first mounting slots, so that water channel branches are formed between adjacent water channel ribs. Each water channel rib includes one first water channel rib and multiple second water channel ribs. The second water channel ribs are used to form a flow channel between two water channel branches on both sides of them to connect the two water channel branches on both sides, thereby forming a cooling water channel running circumferentially along the annular sealing space. The first water channel ribs are used to block the connection between the two water channel branches on both sides of them to form the beginning and end ends of the cooling water channel. The inner circumferential surface of the outer shell is provided with a second mounting groove that is the same number and position as the first mounting groove. The second mounting grooves all extend axially from one end of the annular sealing space to the other end. The bottom end of the water channel rib is installed in the first mounting groove, and the top end of the water channel rib is installed in the corresponding second mounting groove.

2. The water-cooled motor housing with adjustable cooling channels according to claim 1, characterized in that: The second waterway rib has an overflow port on its side, which is used to form an overflow channel between the two waterway branches on both sides to connect the two waterway branches on both sides.

3. The water-cooled motor housing with adjustable cooling channels according to claim 2, characterized in that: One end of the inner shell extends outward to form a first flange, and the other end of the inner shell is provided with a male stop. The end of the outer shell near the first flange abuts against the first flange and is fixedly connected to the first flange. The end of the outer shell away from the first flange extends inward to form a flange, and the inner circumferential surface of the flange is provided with a female stop that mates with the male stop. Through the engagement of the male stop and the female stop, the annular sealing space is formed between the outer circumferential surface of the inner shell and the inner circumferential surface of the outer shell, and the central axis of the outer shell and the central axis of the inner shell are coaxial.

4. The water-cooled motor housing with adjustable cooling channels according to claim 3, characterized in that: A first annular seal is provided between the first flange and the end face of the housing near the first flange; a second annular seal is provided between the male stop and the female stop.

5. The water-cooled motor housing with adjustable cooling channels according to claim 3, characterized in that: The first flange has blind holes on the side near the male stop, which are the same number and position as the first mounting groove. The inner side of the blind hole matches the outer side of the water channel rib plate. The inner side of the blind hole communicates with the corresponding first mounting groove. The end of each water channel rib plate near the first flange is inserted into the corresponding blind hole, and the end of each water channel rib plate away from the first flange abuts against the flange. This presses each water channel rib plate between the flange and the bottom of the blind hole.

6. The water-cooled motor housing with adjustable cooling channels according to claim 3, characterized in that: The outer casing extends outward from one end near the first flange to form a second flange, which abuts against the first flange and is fixedly connected to the first flange.

7. The water-cooled motor housing with adjustable cooling channels according to claim 1, characterized in that: Both the first mounting groove and the second mounting groove have radial cross-sections in the shape of an isosceles trapezoid, and both the first mounting groove and the second mounting groove taper inward from the groove opening toward the groove bottom.

8. An electric motor, characterized in that: It includes a water-cooled motor housing with variable cooling channels as described in any one of claims 1-7, a stator, a rotor, and a rotor shaft installed within the water-cooled motor housing with variable cooling channels.

9. A method for adjusting a cooling water channel, characterized in that: This is achieved using a water-cooled motor housing with variable cooling channels as described in any one of claims 1-7, comprising: Assemble the inner shell and the outer shell, and arrange multiple water channel ribs circumferentially between the inner shell and the outer shell; so that multiple water channel branches are formed in the annular sealed space, thereby forming the cooling water channel running circumferentially along the annular sealed space, and adjust the flow area of ​​each water channel branch. By adjusting the reinforcing ribs of each of the second water channels, the position of the flow passage between each of the water channel branches is adjusted, thereby adjusting the connection position between each of the water channel branches, thus achieving the adjustment of the flow direction of the cooling water in each of the water channel branches; thereby achieving the adjustment of the cooling water channel.

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