Gap plate, rotor, motor and vehicle

Abstract

The application discloses a magnetic isolation plate, a rotor, a motor and a vehicle, and belongs to the technical field of motors. The magnetic isolation plate comprises a plate body, wherein the plate body comprises: a first flow guide groove arranged on a first side of the plate body, the first flow guide groove being configured to throw out cooling liquid flowing through the first flow guide groove outward by centrifugal force when the plate body rotates around a first axis, so as to cool a stator assembly; and a second flow guide groove arranged on a second side of the plate body, the second flow guide groove being configured to make liquid flowing through the second flow guide groove flow to a rotor assembly when the plate body rotates around the first axis, so as to cool the rotor assembly, which helps to reduce the overall temperature rise of the motor, thereby helping the motor to maintain stable output performance and improving the stability and long-term reliability of system operation.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a magnetic shielding plate, rotor, motor and vehicle. Background Technology

[0002] Permanent magnet synchronous motors are a type of motor with high power density and good energy efficiency, featuring energy saving and environmental protection characteristics. In this type of motor, the rotor, as a rotating component, generates armature reaction through the interaction of the rotor magnetic field and the stator magnetic field, thereby realizing the conversion of electrical energy into mechanical energy.

[0003] In electric vehicle applications, some drive motors employ oil cooling to cool the rotor in order to meet the thermal management requirements under high power density conditions. However, existing motor oil circuit designs have limitations in terms of cooling paths and heat exchange efficiency, making it difficult to effectively control the motor's temperature rise, which may adversely affect the motor's output performance, system stability, and long-term reliability. Utility Model Content

[0004] This application provides a magnetic shielding plate, a rotor, a motor, and a vehicle, which improves the cooling efficiency of the motor and at least partially solves the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a magnetic shielding plate is provided, comprising a plate body, said plate body including: A first flow guide channel is disposed on the first side of the plate body. The first flow guide channel is configured to, when the plate body rotates about a first axis, use centrifugal force to throw the coolant flowing through the first flow guide channel outward, thereby achieving cooling of the stator assembly; and A second flow channel is disposed on the second side of the plate body. The second flow channel is configured to allow liquid flowing through the second flow channel to flow to the rotor assembly for cooling the rotor assembly when the plate body rotates about the first axis.

[0006] In some embodiments, the first guide groove extends radially along the plate.

[0007] In some embodiments, the second guide groove extends radially along the plate.

[0008] In some embodiments, the first guide channel and the second guide channel are spaced apart.

[0009] In some embodiments, the depth of the first guide groove gradually decreases along a first direction from the center side to the outer periphery of the plate.

[0010] In some embodiments, the width of the first guide channel gradually increases from the bottom of the channel to the opening side in the depth direction.

[0011] In some embodiments, at least two of the first flow channels are provided at circumferential intervals along the plate.

[0012] In some embodiments, the at least two first guide grooves are evenly distributed along the circumference of the plate.

[0013] In some embodiments, the number of the first guide channels is a, where: 2 ≤ a ≤ 6.

[0014] In some embodiments, the depth of the first guide channel is b, where: 1mm≤b≤4mm.

[0015] In some embodiments, the width of the first guide groove is c, where: 2mm≤c≤5mm.

[0016] In some embodiments, the angle between the extension direction of the first guide groove and the radial direction of the plate is α, where: 1°≤α≤5°.

[0017] In some embodiments, there are two plates, one plate is configured to be located at the first end of the iron core, and the other plate is configured to be located at the second end of the iron core.

[0018] In some embodiments, the plate is provided with a liquid outlet hole, which is used to communicate with a second guide groove on another plate.

[0019] In some embodiments, the diameter of the liquid outlet hole of the plate is d, wherein: 2mm≤d≤4mm.

[0020] In some embodiments, the second flow channel is disposed on the plate body.

[0021] In some embodiments, the number of the second flow channels is at least two.

[0022] In some embodiments, the number of the second guide grooves is half the number of core poles.

[0023] In some embodiments, the plate is provided with a liquid inlet, which is connected to the second guide channel. The liquid inlet is configured to guide the liquid into the second guide channel when the liquid flows through the liquid inlet.

[0024] In some embodiments, the diameter of the liquid inlet is e, where: 3mm≤e≤5mm.

[0025] In some embodiments, the liquid inlet is provided in a one-to-one correspondence with the second guide channel.

[0026] In some embodiments, a turbulence groove is provided on the side of the plate away from the iron core.

[0027] In some embodiments, the turbulence groove extends in an arc shape with the first axis as the center.

[0028] In some embodiments, the central angle of the turbulence channel is β, wherein 30°≤β≤60° is satisfied.

[0029] In some embodiments, the width of the turbulence groove along the radial direction of the plate is f, where: 2mm≤f≤5mm.

[0030] In some embodiments, the depth of the turbulence groove is g, where: 1mm≤g≤3mm.

[0031] According to a second aspect of this application, a rotor is provided, comprising the magnetic shielding plate described above.

[0032] In some embodiments, it also includes: The rotating shaft has a channel and a radially extending first and second connecting holes; and An iron core is fitted onto the rotating shaft, and the iron core is provided with cooling channels; The plate is sleeved on the rotating shaft and located at the end of the iron core. The first connecting hole is connected to the first guide groove, the second connecting hole is connected to the second guide groove, and the second guide groove is connected to the cooling channel.

[0033] In some embodiments, the cooling channel includes an inlet and an outlet, the inlet being located at one end of the iron core and the outlet being located at the other end of the iron core, the second guide groove communicating with the inlet and the outlet hole of the plate communicating with the outlet.

[0034] In some embodiments, the number of cooling channels is at least two, and the at least two cooling channels are evenly distributed at circumferential intervals along the iron core.

[0035] In some embodiments, the cooling channel includes a first channel and a second channel; The liquid inlet of the first flow channel is located at the first end of the iron core, and the liquid inlet of the second flow channel is located at the second end of the iron core; The liquid inlet of the first flow channel is connected to the second guide groove of the plate located at the first end of the iron core, and the liquid outlet of the first flow channel is connected to the liquid outlet hole of the plate located at the second end of the iron core. The inlet of the second flow channel is connected to the second guide groove of the plate located at the second end of the iron core, and the outlet of the second flow channel is connected to the outlet hole of the plate located at the first end of the iron core.

[0036] In some embodiments, the number of the first flow channels is multiple, and the number of the second flow channels is equal to the number of the first flow channels.

[0037] In some embodiments, the first flow channel and the second flow channel are staggered along the circumference of the iron core and are arranged at equal angular intervals.

[0038] In some embodiments, the number of cooling channels is the same as the number of poles of the iron core.

[0039] In some embodiments, the number of poles of the iron core is 4, 6 or 8.

[0040] In some embodiments, the core includes a permanent magnet, which is at least partially located within the cooling channel.

[0041] According to a third aspect of this application, an electric motor is also provided, including the magnetic shielding plate described in the above technical solution, or the rotor described in the above technical solution.

[0042] According to a fourth aspect of this application, a vehicle is also provided, including the magnetic shielding plate described in the above-described technical solution, or the rotor described in the above-described technical solution, or the motor described in the above-described technical solution.

[0043] In the magnetic shielding plate of this application embodiment, the cooling oil can be guided to the winding end area under the action of rotation through the first guide groove, thereby cooling the winding; through the second guide groove, the cooling oil can enter the rotor core to cool the core. The formation of the above cooling path helps to reduce the overall temperature rise of the motor to a certain extent, thereby helping the motor maintain stable output performance and improving the stability and long-term reliability of system operation.

[0044] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0047] Figure 1 This is a schematic diagram of the overall structure of the magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 2 This is a cross-sectional view of the magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 3This is a top view of the magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 4 This is a top view of another magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 5 This is a top view of another magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 6 This is a top view of another magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 7 This is a bottom view of the magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 8 This is a bottom view of another magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 9 This is a bottom view of another magnetic shielding plate provided in an exemplary embodiment of this disclosure; Figure 10 This is a schematic diagram of the iron core structure provided in an exemplary embodiment of this disclosure; Figure 11 This is a schematic diagram of the rotor provided in an exemplary embodiment of this disclosure; Figure 12 This is a partial structural schematic diagram of the rotor provided in an exemplary embodiment of this disclosure.

[0048] Explanation of reference numerals in the attached figures: 10. Rotating shaft; 11. First connecting hole; 12. Second connecting hole; 13. Channel; 20. Iron core; 21. Cooling channel; 21a. Liquid inlet; 21b. Liquid outlet; 21c. First channel; 21d. Second channel; 22. First end; 23. Second end; 24. Permanent magnet; 100. Plate; 110. First guide groove; 120. Second guide groove; 130. Liquid outlet; 140. Liquid inlet; 150. Turbulence groove. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0050] According to the first aspect of this application, referring to Figures 1 to 9 This disclosure provides a magnetic shielding plate applied to a rotor. Exemplarily, the magnetic shielding plate can be installed at the end of the rotor core 20, for example, respectively disposed at both ends of the core 20, thereby fixing the position of the core 20 to a certain extent.

[0051] In some embodiments, the magnetic shielding plate includes a plate body 100. Exemplarily, the plate body 100 may be disc-shaped to achieve a relatively uniform force distribution when it engages with the iron core 20 at the rotor end, which is beneficial for the stable fixation of the iron core 20. The plate body 100 may be made of a metallic material, such as aluminum alloy or steel, which helps to provide a certain degree of thermal conductivity while maintaining structural strength, thereby aiding in heat dissipation at the rotor end.

[0052] In some embodiments, the plate body 100 includes a first guide groove 110 and a second guide groove 120. The plate body 100 has a first side and a second side, the first guide groove 110 is disposed on the first side of the plate body 100, and the second guide groove 120 is disposed on the second side of the plate body 100.

[0053] The first guide channel 110 is configured to, when the plate 100 rotates about the first axis, use centrifugal force to throw the coolant flowing through the first guide channel 110 outwards, thereby cooling the stator assembly. The coolant is sprayed through the first guide channel 110 onto the end region of the stator assembly, achieving cooling of the stator end windings. Since the stator end windings are typically a concentrated heat-generating area, the spraying of coolant helps reduce their operating temperature, thereby improving stator insulation life and operational stability.

[0054] The second guide channel 120 is configured to direct the liquid flowing through it to the rotor assembly for cooling the rotor assembly when the plate 100 rotates about the first axis. The coolant passing through the second guide channel 120 helps control the internal temperature of the rotor. Exemplarily, the second guide channel 120 can be formed on the side of the plate 100 that mates with the iron core 20, and the coolant is introduced by connecting with the channel 13 on the rotating shaft 10 or the flow path of the iron core 20. In this way, the coolant not only cools the iron core 20 but also covers the area near the permanent magnet 24, which positively contributes to suppressing the risk of demagnetization of the permanent magnet due to temperature rise.

[0055] Through the cooperation of the first guide groove 110 and the second guide groove 120, cooling of the stator assembly and the rotor assembly can be achieved respectively during the rotation of the plate 100. This structure is beneficial to optimizing the overall thermal management of the motor, forming a path for coordinated cooling of the stator and rotor, thereby improving the stable operating performance and long-term reliability of the motor under high power density conditions.

[0056] In some embodiments, refer to Figure 1 and Figure 2 The first guide channel 110 extends radially along the plate 100 and is configured to cause the liquid in the first guide channel 110 to be thrown out radially along the plate 100 when the plate 100 rotates about the first axis.

[0057] In some embodiments, the second guide groove 120 extends radially along the plate 100. When the plate 100 rotates, the second guide groove 120 can guide the liquid to flow to the end of the iron core 20, which is beneficial to improving the flow path of the liquid in the cooling channel 21, thereby providing a certain degree of regulation on the temperature rise of the iron core 20.

[0058] In some embodiments, the second guide channel 120 is spaced apart from the first guide channel 110.

[0059] For example, the plate 100 has a first end face on its first side and a second end face on its second side. A first guide groove 110 is located on the first end face of the plate 100, while a second guide groove 120 is located on the second end face of the plate 100. The first end face and the second end face are two opposite faces on the plate 100. For example, the second guide groove 120 is located on the end face that mates with the iron core 20. This arrangement allows the liquid to be guided from the center to the outer edge during the rotation of the plate 100 and smoothly enter the cooling channel 21 of the iron core 20, thereby improving the uniformity of liquid distribution and cooling effect at the rotor end to a certain extent.

[0060] Through the above structure, some of the cooling oil is thrown along the first guide groove 110 on the first end face of the plate 100 to the inside of the stator end winding, thereby providing cooling for the end winding to a certain extent and helping to reduce the local temperature of the end winding; at the same time, another part of the cooling oil enters the core 20 along the second guide groove 120 on the second end face of the plate 100, which helps to cool the core 20 and improves the temperature distribution of the core 20 and the magnet to a certain extent.

[0061] With the design of this flow channel, the liquid can form a split path at the rotor end, which guides the liquid to the end winding on the one hand and enters the cooling channel 21 of the iron core 20 on the other hand, realizing multi-area cooling of key rotor components, which is conducive to improving the overall thermal management efficiency of the rotor.

[0062] For example, refer to Figure 2 and Figure 3 The first guide groove 110 is opened from the center side of the plate 100 outward. After the plate 100 is installed on the rotor shaft 10, the connecting hole on the shaft 10 is connected to the first guide groove 110, and the cooling oil can be thrown towards the winding area at the stator end through the guide groove, forming effective spray cooling during rotation. The structure of the second guide groove 120 is similar, but its function is to allow the cooling oil in the shaft 10 to enter the iron core 20 through the second guide groove 120 and flow along the cooling channel 21 inside the iron core 20, thereby achieving cooling and temperature rise control of the iron core 20 to a certain extent.

[0063] In some embodiments, refer to Figure 2 and Figure 3From the center side of the plate 100 to the outer periphery, the depth of the first guide groove 110 gradually decreases along the first direction. This gradual depth design allows the liquid to be thrown out radially in a certain pattern when the plate 100 rotates, which is beneficial to forming a more uniform liquid distribution, thereby improving the cooling effect of the end winding to a certain extent. At the same time, it can reduce the local impact that may be generated during the liquid throwing process, making the liquid flow more stable.

[0064] For example, the first direction is a radial direction from the center of the plate 100 to the outer periphery, that is, from the center side of the plate 100 to the outer periphery side of the plate 100. The depth of the first guide groove 110 gradually decreases, which is beneficial to gradually guide the cooling oil to be sprayed obliquely towards the inner side of the stator end winding.

[0065] In some embodiments, the width of the first guide groove 110 gradually increases from the bottom to the opening side in the depth direction. That is, the first guide groove 110 is flared. This flared design is beneficial to allow the cooling oil to be thrown out more smoothly in the radial direction when the plate 100 rotates, thereby facilitating the liquid to be sprayed into the end winding area and achieving a more uniform cooling effect.

[0066] In some embodiments, refer to Figure 4 and Figure 5 At least two first guide grooves 110 are provided at circumferential intervals along the plate 100. The distribution of at least two first guide grooves 110 is conducive to the multi-point ejection of cooling oil during the rotation of the plate 100, thereby improving the cooling coverage of the winding end to a certain extent, making the cooling effect more uniform, and helping to reduce the risk of local overheating.

[0067] In some embodiments, at least two first guide grooves 110 are evenly distributed along the circumference of the plate 100. This arrangement helps to evenly distribute the cooling oil to different positions at the winding ends when the plate 100 rotates, thereby improving the cooling coverage to a certain extent, reducing the unevenness of local temperature rise, and benefiting the overall thermal management effect of the winding.

[0068] In some embodiments, refer to Figure 4 and Figure 5 The number of the first guide grooves 110 is 'a', where 2 ≤ a ≤ 6. This range of design facilitates uniform arrangement around the plate 100, resulting in a more balanced distribution of cooling oil spray. On the other hand, it avoids the problems of uneven cooling due to too few guide grooves, or weakened strength and increased processing complexity due to too many.

[0069] For example, the number of first guide channels 110 can be 2, 3, 4, 5 or 6, and this application embodiment does not specifically limit this.

[0070] In some embodiments, the depth of the first guide groove 110 is b, where 1 mm ≤ b ≤ 4 mm. This depth range is beneficial for providing sufficient volume for cooling oil to flow while maintaining the overall structural strength of the plate 100. When the depth is less than 1 mm, the flow rate of cooling oil may be insufficient, affecting the spraying effect; while when the depth is greater than 4 mm, it may cause local weakening of the plate 100, which is not conducive to long-term stable use.

[0071] For example, the depth of the first guide groove 110 can be 1.0mm, 1.2mm, 1.5mm, 1.7mm, 1.9mm, 2.1mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.3mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.85mm, 3.9mm, 3.95mm or 4.0mm, and this application embodiment does not specifically limit it.

[0072] In some embodiments, the width of the first guide groove 110 is c, where 2mm ≤ c ≤ 5mm. When the width of the first guide groove 110 is set within this range, on the one hand, it can provide suitable flow space for the radial ejection of cooling oil, so that the cooling oil maintains a certain flow velocity and spray angle during the ejection process, which is conducive to the formation of a well-covered oil film in the end winding area, thereby playing a role in uniform cooling; on the other hand, this width range avoids the excessive flow resistance that may be caused by the guide groove being too narrow, and also avoids the dispersion of cooling oil flow and non-concentrated spray that may be caused by the guide groove being too wide, thereby achieving a balance between cooling efficiency and flow stability to a certain extent.

[0073] For example, when the width of the first guide groove 110 is 2 mm, the cooling oil spray velocity is relatively high, which is suitable for forming concentrated impact cooling in a local area; when the width of the first guide groove 110 is 5 mm, the spray coverage area is wider, which is suitable for achieving large-area coverage cooling at the winding end. This application embodiment does not specifically limit this.

[0074] For example, the width of the first guide groove 110 can be 2.0mm, 2.2mm, 2.35mm, 2.5mm, 2.65mm, 2.8mm, 2.95mm, 3.1mm, 3.25mm, 3.4mm, 3.55mm, 3.7mm, 3.85mm, 4.0mm, 4.2mm, 4.35mm, 4.55mm, 4.7mm, 4.85mm or 5.0mm, and this application embodiment does not specifically limit it.

[0075] In some embodiments, refer to Figure 2 and Figure 3The angle between the extension direction of the first guide groove 110 and the radial direction of the plate 100 is α, where 1°≤α≤5°. This angle setting ensures that the cooling oil is not strictly thrown out radially during the rotation of the plate 100, but forms a certain deflection spray angle, which is beneficial to the diffusion and coverage of the cooling oil on the inner side of the winding end or the transition area of ​​the iron core 20, and avoids insufficient cooling in some areas due to the spray path being too simple.

[0076] When α is small (e.g., close to 1°), the cooling oil is sprayed out primarily radially, resulting in a shorter flow path and facilitating rapid discharge. When α is large (e.g., close to 5°), the cooling oil sprays out at a certain angle, which helps to form a wider coverage area and enhances the cooling uniformity of the winding end region. By setting this angle range, it is possible to balance spray concentration and coverage to a certain extent, thereby improving the cooling oil utilization efficiency and the overall cooling performance of the motor.

[0077] For example, the angle between the extension direction of the first guide groove 110 and the radial direction of the plate 100 can be: 1.0°, 1.3°, 1.6°, 1.9°, 2.2°, 2.5°, 2.8°, 3.0°, 3.2°, 3.4°, 3.6°, 3.8°, 4.0°, 4.2°, 4.4°, 4.6°, 4.7°, 4.8°, 4.9°, or 5.0°. This application embodiment does not specifically limit this.

[0078] Within the above range, at smaller included angles (such as 1.0°–2.0°), the cooling oil is basically thrown out radially, the liquid jet path is short, and it can be quickly guided to the inner side of the stator end, which is suitable for achieving efficient fixed-point cooling. At a medium angle (e.g., 2.2°–3.4°), the cooling oil spray trajectory deflects to a certain extent, which helps the cooling oil cover a larger area of ​​the end winding or the transition zone of the core 20, forming a relatively uniform cooling distribution. At a larger angle (e.g., 3.6°–5.0°), the cooling oil spray exhibits obvious oblique diffusion, and the liquid can cover a wider area after being thrown out, which helps to reduce cooling dead zones and improve the uniformity and stability of overall cooling.

[0079] In some embodiments, refer to Figure 2 and Figure 11There are two plates 100, one located at the first end 22 of the iron core 20 and the other at the second end 23 of the iron core 20. By arranging plates 100 at both ends of the iron core 20, cooling oil can be guided into different flow paths when the motor rotor rotates, ensuring that both ends of the iron core 20 receive cooling oil. On the one hand, this helps reduce the temperature difference between the two ends of the iron core 20, avoiding localized overheating; on the other hand, the cooperation of the two-end plates 100 allows the cooling oil to act on both the end winding area and the interior of the iron core 20, thereby improving the overall cooling uniformity and efficiency to a certain extent.

[0080] In some embodiments, refer to Figure 5 and Figure 6 The plate 100 is provided with a liquid outlet 130, which is used to communicate with the second guide groove 120 on another plate 100. Through this structural design, the cooling oil can form a flow path between the two plates 100, making the transfer of cooling oil between the plates 100 smoother. For example, after the cooling oil enters from the second guide groove 120 of the plate 100 at the first end 22 of the core 20, it flows through the cooling channel 21 inside the core 20 to the liquid outlet 130 of the plate 100 at the second end 23 of the core 20, and is sprayed from the liquid outlet 130 onto the inner side of the stator end winding, thereby cooling the winding end. Similarly, after the cooling oil enters from the second guide groove 120 of the plate 100 at the second end 23 of the iron core 20, it flows through the cooling channel 21 inside the iron core 20 to the liquid outlet 130 of the plate 100 at the first end 22 of the iron core 20, and is sprayed from the liquid outlet 130 onto the inner side of the stator end winding, which can achieve cooling of the iron core 20 and the stator end winding, thereby helping to control the temperature rise of the motor and improve the output performance and reliability of the motor.

[0081] In some embodiments, the diameter of the liquid outlet hole 130 of the plate 100 is d, wherein 2mm≤d≤4mm. The diameter design of the liquid outlet hole 130 can adjust the flow rate of the sprayed cooling oil to a certain extent, thereby helping to control the amount of cooling oil sprayed onto the inner side of the stator end winding, achieving uniform cooling, and reducing the local impact of the spray impact on the winding to a certain extent.

[0082] For example, the diameter of the liquid outlet hole 130 of the plate 100 can be 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm or 4.0mm, and the embodiments of this application do not specifically limit it.

[0083] In some embodiments, the second guide groove 120 is disposed on the plate 100. By disposing the second guide groove 120 on the plate 100, it is possible to avoid opening grooves on the iron core 20, thereby reducing damage to the structure of the iron core 20, which is beneficial to maintaining the integrity and magnetic conductivity of the iron core 20, while still effectively guiding the cooling oil into the internal flow channel of the iron core 20 to achieve cooling of the iron core 20.

[0084] In some embodiments, refer to Figure 7 and Figure 8 The number of second guide grooves 120 is at least two. Setting multiple second guide grooves 120 is beneficial to guide the cooling oil evenly to different positions of the iron core 20, thereby improving the overall cooling effect of the iron core 20 to a certain extent, and helping to control the uniform distribution of the temperature of the iron core 20 and reduce the possibility of local overheating.

[0085] In some embodiments, refer to Figure 9 and Figure 10 The number of second guide grooves 120 is half the number of poles in the iron core 20. Here, the number of poles in the iron core 20 refers to the number of poles on the rotor or motor, i.e., the number of magnetic poles on the rotor. Each magnetic pole corresponds to a change in the direction of the magnetic field generated by the rotor during rotation; therefore, the number of poles reflects the distribution characteristics and rotation period of the rotor's magnetic field. By setting the number of second guide grooves 120 to half the number of poles in the iron core 20, it is beneficial to ensure that the cooling oil is evenly distributed in the iron core 20 corresponding to each pole, thereby improving the cooling effect and temperature uniformity to a certain extent.

[0086] In some embodiments, refer to Figure 11 and Figure 12 The plate 100 is provided with a liquid inlet 140, which communicates with the second guide groove 120. The liquid inlet 140 is configured to guide the liquid into the second guide groove 120 when the liquid flows through the liquid inlet 140. Through the liquid inlet 140, external cooling oil can smoothly enter the second guide groove 120 to cool the inside of the iron core 20. For example, when the plate 100 is installed on the rotating shaft 10, the rotating shaft 10 is provided with a hole that mates with the liquid inlet 140. Cooling oil can flow from inside the rotating shaft 10 into the liquid inlet 140 through this hole and further into the second guide groove 120, thereby forming a cooling oil passage from the rotating shaft 10—liquid inlet 140—second guide groove 120—internal channel of the iron core 20, achieving effective cooling of the iron core 20.

[0087] In some embodiments, the diameter of the liquid inlet 140 is e, where 3mm ≤ e ≤ 5mm. By setting the diameter of the liquid inlet 140 within the above range, it is beneficial to control the flow rate of cooling oil flowing into the second guide channel 120, so that the liquid can smoothly enter the second guide channel 120 and achieve uniform cooling of the inside of the iron core 20 to a certain extent, while avoiding local impact or flow instability caused by excessive flow velocity.

[0088] For example, the diameter of the liquid inlet 140 can be 3.0mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4.0mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm or 5.0mm, and this application embodiment does not specifically limit it.

[0089] In some embodiments, the liquid inlet 140 is provided in a one-to-one correspondence with the second guide channel 120. For example, each liquid inlet 140 corresponds to one second guide channel 120, so that when liquid flows through the liquid inlet 140, it can directly enter the corresponding second guide channel 120. This arrangement is beneficial for uniformly distributing the cooling oil along the iron core 20, which can improve the cooling uniformity of the iron core 20 to a certain extent, and at the same time helps to reduce local impact of the liquid during the guiding process, maintaining smooth flow.

[0090] In some embodiments, a turbulence groove 150 is provided on the side of the plate 100 opposite to the iron core 20. The turbulence groove 150 can create turbulence for the ejected cooling oil during the rotation of the plate 100, which helps to break the concentration of localized liquid flow, making the distribution of cooling oil on the end winding more uniform, and directing the cooling oil towards the end winding. Exemplarily, the turbulence groove 150 can extend along the circumference of the plate 100, or it can be opened in a radial direction or a direction perpendicular to the radial direction; the shape of the turbulence groove 150 can be arc-shaped or straight. The turbulence groove 150 helps to reduce the localized impact that may occur during the ejection of liquid, thereby improving the cooling effect of the end winding to a certain extent and contributing to the smoothness of liquid flow.

[0091] In some embodiments, refer to Figure 4 and Figure 6 The turbulence groove 150 extends in an arc shape with the first axis as the center. This arc-shaped extension is beneficial to forming annular turbulence during the rotation of the plate 100, making the distribution of the thrown-out cooling oil on the end winding more uniform, thereby improving the cooling effect of the end winding to a certain extent, while reducing the local impact that the liquid may generate during the throwing process, which is conducive to the smoothness of the liquid flow.

[0092] In some embodiments, the central angle of the turbulence groove 150 is β, wherein 30°≤β≤60° is satisfied. By setting an appropriate central angle, it is beneficial to form a moderate annular turbulence when the plate 100 rotates, so that the distribution of the ejected cooling oil on the end winding is more uniform, and at the same time, it can alleviate the local impact of the liquid to a certain extent, thereby facilitating the smooth flow of the cooling oil and improving the cooling effect of the winding.

[0093] For example, the central angle of the turbulence groove 150 can be 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 42°, 44°, 46°, 48°, 50°, 52°, 54°, 56°, 58° or 60°, and the embodiments of this application do not specifically limit it.

[0094] In some embodiments, the width of the turbulence groove 150 along the radial direction of the plate 100 is f, where 2mm≤f≤5mm. The width design of the turbulence groove 150 is beneficial to generate a certain liquid turbulence when the plate 100 rotates, thereby making the distribution of the ejected cooling oil more uniform, which is conducive to improving the oil uniformity of the end winding, and at the same time can reduce local liquid impact to a certain extent and maintain the stability of liquid flow.

[0095] For example, the width of the turbulence groove 150 along the radial direction of the plate 100 can be 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5.0mm, and this embodiment does not specifically limit it.

[0096] In some embodiments, the depth of the turbulence groove 150 is g, where 1 mm ≤ g ≤ 3 mm. The turbulence groove 150 can disturb the liquid flow when the plate 100 rotates, which helps to reduce the local impact that may occur during the radial ejection of the liquid. At the same time, it can make the liquid more evenly distributed in the radial and circumferential directions, thereby improving the cooling effect of the end winding to a certain extent, and helping to stabilize the liquid flow, reduce possible turbulence and vortex phenomena, and make the cooling oil sprayed onto the inner side of the end winding more evenly, thereby improving the overall heat dissipation efficiency of the rotor.

[0097] For example, the depth of the eddy current groove 150 can be 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3.0mm, and the embodiments of this application do not specifically limit it.

[0098] According to the second aspect of this disclosure, referring to Figure 11 and Figure 12 A rotor is provided, including the magnetic shielding plate described in the above embodiments. This rotor possesses all the beneficial effects of the aforementioned magnetic shielding plate, which will not be elaborated further herein.

[0099] In some embodiments, refer to Figure 11 and Figure 12 The rotor also includes a shaft 10 and an iron core 20. The shaft 10 is provided with a channel 13 and a radially extending first connecting hole 11 and second connecting hole 12. The first connecting hole 11 and the second connecting hole 12 are both connected to the channel 13. The channel 13 is used to connect with an external coolant system, so that the coolant enters the interior of the channel 13 and enters the plate 100 through the first connecting hole 11 and the second connecting hole 12. The iron core 20 is sleeved on the shaft 10 and is provided with a cooling channel 21.

[0100] The plate 100 is sleeved on the rotating shaft 10 and located at the end of the iron core 20. The first connecting hole 11 is connected to the first guide groove 110, the second connecting hole 12 is connected to the second guide groove 120, and the second guide groove 120 is connected to the cooling channel 21.

[0101] The first guide groove 110 on the plate 100 is connected to the first connecting hole 11, allowing the coolant flowing inside the shaft 10 to be radially ejected along the first end face of the plate 100, providing cooling for the stator end winding. The second guide groove 120 on the plate 100 is connected to the second connecting hole 12, and further connected to the cooling channel 21 inside the core 20, allowing the coolant to enter the core 20 along the second guide groove 120, flow through the internal channel of the core 20 to the outlet hole 130 of the plate 100 at the other end, and thus spray onto the inner side of the stator end winding, achieving cooling for the core 20 and the winding.

[0102] This structural design allows the liquid to form multiple cooling paths as the rotor rotates. This benefits both the uniform distribution of coolant to the end windings and the effective transfer of heat from the iron core 20 to the coolant, thus controlling the motor's temperature rise. To a certain extent, this arrangement reduces potential localized impacts during liquid flow, maintaining a relatively stable flow as the liquid exits and enters the channels. This contributes to stable cooling and improves the overall heat dissipation efficiency and long-term reliability of the rotor.

[0103] In some embodiments, refer to Figure 11 and Figure 12The cooling channel 21 includes an inlet 21a and an outlet 21b. The inlet 21a is located at one end of the iron core 20, and the outlet 21b is located at the other end of the iron core 20. The second guide groove 120 is connected to the inlet 21a, and the outlet hole 130 of the plate 100 is connected to the outlet 21b.

[0104] The second guide groove 120 on the plate 100 is connected to the liquid inlet 21a, so that the coolant can enter the flow channel inside the iron core 20 along the second guide groove 120; the liquid outlet 130 on the plate 100 is connected to the liquid outlet 21b, so that the coolant flowing through the cooling flow channel 21 inside the iron core 20 is sprayed out from the liquid outlet 130 and further sprayed to the inner side of the stator end winding, thereby achieving cooling of the iron core 20 and the end winding.

[0105] This arrangement, to a certain extent, helps to form a continuous cooling path from plate 100 to the interior of iron core 20 and then to another plate 100, allowing the coolant to be evenly distributed during rotation, while reducing local liquid impact and making the flow more stable. Through the synergistic effect of the inlet 21a, the second guide channel 120, the cooling channel 21, and the outlet hole 130, it is beneficial to effectively control the motor temperature rise and improve the output performance of the motor and the system stability under different operating conditions.

[0106] In some embodiments, refer to Figure 11 and Figure 12 The number of cooling channels 21 is at least two, and the at least two cooling channels 21 are evenly distributed along the circumference of the iron core 20. This arrangement is beneficial to forming a uniform coolant distribution during rotor rotation, thereby providing a balanced cooling effect to various parts of the iron core 20 to a certain extent, reducing the risk of excessive local temperature, and helping to maintain the overall temperature balance of the rotor and the stability of the motor system.

[0107] In some embodiments, refer to Figure 11 and Figure 12 The cooling channel 21 includes a first channel 21c and a second channel 21d. The inlet 21a of the first channel 21c is located at the first end 22 of the iron core 20, and the inlet 21a of the second channel 21d is located at the second end 23 of the iron core 20. The inlet 21a of the first channel 21c communicates with the second guide groove 120 of the plate 100 located at the first end 22 of the iron core 20, and the outlet 21b of the first channel 21c communicates with the outlet hole 130 of the plate 100 located at the second end 23 of the iron core 20. The inlet 21a of the second channel 21d communicates with the second guide groove 120 of the plate 100 located at the second end 23 of the iron core 20, and the outlet 21b of the second channel 21d communicates with the outlet hole 130 of the plate 100 located at the first end 22 of the iron core 20.

[0108] The inlet 21a of the first flow channel 21c is connected to the second guide groove 120 of the first end 22 plate 100 of the core 20. Coolant enters the first flow channel 21c through the second guide groove 120, flows along the interior of the core 20 to the second end 23, and finally exits from the outlet 130 of the second end 23 plate 100, spraying onto the inner side of the end winding. The inlet 21a of the second flow channel 21d is connected to the second guide groove 120 of the second end 23 plate 100 of the core 20. Coolant enters the second flow channel 21d through the second guide groove 120, flows along the interior of the core 20 to the first end 22, and finally exits from the outlet 130 of the first end 22 plate 100, also spraying onto the inner side of the end winding. This design helps to achieve balanced cooling of the core 20 and the end winding to a certain extent, while maintaining the smoothness of the coolant flow and the overall heat dissipation effect of the system.

[0109] In some embodiments, refer to Figure 11 and Figure 12 The number of first flow channels 21c is multiple, and the number of second flow channels 21d is equal to the number of first flow channels 21c. By setting multiple flow channels, the coolant can be evenly distributed inside the iron core 20 along different paths, which is beneficial to achieving temperature balance between the poles of the iron core 20 to a certain extent. This is beneficial to the overall heat dissipation of the rotor and the cooling effect of the end windings, while also helping to maintain the stability of the coolant flow in the flow channels.

[0110] In some embodiments, the first flow channel 21c and the second flow channel 21d are staggered along the circumference of the core 20 and are arranged at equal angular intervals. This arrangement is beneficial for making the weight distribution of the core 20 more uniform during rotation, thereby reducing to some extent the eccentric rotation or wear that may be caused by uneven weight distribution, which is conducive to maintaining the smooth operation of the rotor and extending the service life of the rotor.

[0111] In some embodiments, refer to Figure 10 and Figure 11 The iron core 20 includes a permanent magnet 24, which is at least partially located within the cooling channel 21. Exemplarily, to facilitate the installation of the permanent magnet 24, a through slot can be formed on the iron core 20. After the permanent magnet 24 is placed into the through slot, a gap is formed between the through slot and the permanent magnet 24, serving as the cooling channel 21. When the coolant passes through this channel, it can cool the iron core 20 and also help lower the temperature of the permanent magnet 24, thereby mitigating the adverse effects of temperature rise on magnetic properties to a certain extent, which is beneficial for maintaining the motor's output performance and long-term reliability.

[0112] In some embodiments, the number of cooling channels 21 is the same as the number of poles of the iron core 20. This arrangement is beneficial in ensuring that the permanent magnet 24 of each pole can be cooled, thereby mitigating the adverse effects of temperature rise on the magnetic properties of the permanent magnet 24 to a certain extent, and helping to maintain the stability and long-term reliability of the motor output performance.

[0113] In some embodiments, the iron core 20 has 4, 6, or 8 poles. Different pole numbers are beneficial for adapting to motor designs with different power levels and speed requirements, and can also adjust the rotor's magnetic flux distribution and torque characteristics to a certain extent, thereby optimizing the motor's operating performance.

[0114] According to a third aspect of this disclosure, an electric motor is provided, including the magnetic shielding plate or the rotor described in the above embodiments. This motor possesses all the beneficial effects of the aforementioned magnetic shielding plate or rotor, which will not be elaborated further herein.

[0115] According to a fourth aspect of this disclosure, a vehicle is provided, including the magnetic shielding plate, the rotor, or the motor described in the above embodiments. This vehicle possesses all the beneficial effects of the aforementioned magnetic shielding plate, rotor, or motor, which will not be elaborated further herein.

[0116] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0117] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0118] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0119] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0120] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A magnetic shielding plate, characterized in that, Includes a plate body, the plate body comprising: A first guide channel is disposed on the first side of the plate body. The first guide channel is configured to, when the plate body rotates about a first axis, use centrifugal force to throw the coolant flowing through the first guide channel outward, thereby achieving cooling of the stator assembly; and A second flow channel is disposed on the second side of the plate body. The second flow channel is configured to allow liquid flowing through the second flow channel to flow to the rotor assembly for cooling the rotor assembly when the plate body rotates about the first axis.

2. The magnetic shielding plate according to claim 1, characterized in that, The first guide groove extends radially along the plate; and / or, The second guide groove extends radially along the plate; and / or, The first guide channel and the second guide channel are spaced apart.

3. The magnetic shielding plate according to claim 2, characterized in that, From the center side of the plate to the outer periphery, the depth of the first guide groove gradually decreases along the first direction; and / or, The width of the first guide channel gradually increases from the bottom to the opening side in the depth direction; and / or, At least two of the first flow channels are provided at circumferential intervals along the plate; and / or, The number of the first guide channels is 'a', where: 2 ≤ a ≤ 6; and / or, The depth of the first guide channel is b, where: 1mm ≤ b ≤ 4mm; and / or, The width of the first guide channel is c, where: 2mm ≤ c ≤ 5mm; and / or, The angle between the extension direction of the first guide groove and the radial direction of the plate is α, where: 1°≤α≤5°.

4. The magnetic shielding plate according to claim 3, characterized in that, The at least two first guide grooves are evenly distributed along the circumference of the plate.

5. The magnetic shielding plate according to any one of claims 1 to 4, characterized in that, The number of plates is two, one plate is configured to be located at the first end of the iron core, and the other plate is configured to be located at the second end of the iron core; and / or, The second flow channel is disposed on the plate; and / or, The number of the second guide channels is at least two; and / or, The number of the second guide grooves is half the number of iron core poles; And / or, The plate is provided with a liquid inlet, which is connected to the second guide channel. The liquid inlet is configured to guide the liquid into the second guide channel when the liquid flows through the liquid inlet; and / or, A turbulence groove is provided on the first side of the plate.

6. The magnetic shielding plate according to claim 5, characterized in that, The plate is provided with a liquid outlet hole, which is used to communicate with a second guide groove on another plate; and / or The diameter of the liquid inlet is e, where: 3mm ≤ e ≤ 5mm; and / or, The liquid inlet is provided in a one-to-one correspondence with the second guide channel; and / or, The turbulence channel extends in an arc shape with the first axis as its center; and / or, The width of the turbulence groove along the radial direction of the plate is f, where: 2mm ≤ f ≤ 5mm; and / or, The depth of the turbulence groove is g, where: 1mm≤g≤3mm.

7. The magnetic shielding plate according to claim 6, characterized in that, The diameter of the liquid outlet hole of the plate is d, where: 2mm ≤ d ≤ 4mm; and / or, The central angle of the turbulence channel is β, where 30°≤β≤60° is satisfied.

8. A rotor, characterized in that, Includes the magnetic shielding plate according to any one of claims 1 to 7.

9. The rotor according to claim 8, characterized in that, Also includes: The rotating shaft has a channel and a radially extending first and second connecting holes; and An iron core is fitted onto the rotating shaft, and the iron core is provided with cooling channels; The plate is sleeved on the rotating shaft and located at the end of the iron core. The first connecting hole is connected to the first guide groove, the second connecting hole is connected to the second guide groove, and the second guide groove is connected to the cooling channel.

10. The rotor according to claim 9, characterized in that, The cooling channel includes an inlet and an outlet. The inlet is located at one end of the iron core, and the outlet is located at the other end of the iron core. The second guide groove communicates with the inlet, and the outlet hole of the plate communicates with the outlet; and / or... The number of cooling channels is the same as the number of poles of the iron core; and / or, The iron core has 4, 6, or 8 poles; and / or, The iron core includes a permanent magnet, which is at least partially located within the cooling channel.

11. The rotor according to claim 10, characterized in that, The number of cooling channels is at least two, and the at least two cooling channels are evenly distributed at intervals along the circumference of the iron core.

12. The rotor according to claim 11, characterized in that, The cooling channel includes a first channel and a second channel; The liquid inlet of the first flow channel is located at the first end of the iron core, and the liquid inlet of the second flow channel is located at the second end of the iron core; The liquid inlet of the first flow channel is connected to the second guide groove of the plate located at the first end of the iron core, and the liquid outlet of the first flow channel is connected to the liquid outlet hole of the plate located at the second end of the iron core. The inlet of the second flow channel is connected to the second guide groove of the plate located at the second end of the iron core, and the outlet of the second flow channel is connected to the outlet hole of the plate located at the first end of the iron core.

13. The rotor according to claim 12, characterized in that, The number of the first flow channels is multiple, and the number of the second flow channels is equal to the number of the first flow channels; and / or, The first flow channel and the second flow channel are staggered along the circumference of the iron core and are set at equal angular intervals.

14. An electric motor, characterized in that, It includes the magnetic shielding plate according to any one of claims 1 to 7, or the rotor according to any one of claims 8 to 13.

15. A vehicle, characterized in that, It includes the magnetic shielding plate according to any one of claims 1 to 7, the rotor according to any one of claims 8 to 13, or the motor according to claim 14.

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