CN222464269U - Motor rotor end plate, motor rotor assembly and motor - Google Patents
Motor rotor end plate, motor rotor assembly and motor Download PDFInfo
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- CN222464269U CN222464269U CN202420541378.1U CN202420541378U CN222464269U CN 222464269 U CN222464269 U CN 222464269U CN 202420541378 U CN202420541378 U CN 202420541378U CN 222464269 U CN222464269 U CN 222464269U
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Abstract
本申请涉及电机领域，具体涉及一种电机转子的端板、电机转子总成及电机，端板具有朝向转子铁芯的内表面，端板的内表面于圆心处开设有供转子转轴穿设的中心通孔；端板的内表面上还形成有进液流道，进液流道包括第一导流段和第二导流段；第一导流段沿端板的径向延伸，第一导流段的第一端延伸至中心通孔处与转子转轴上的冷却液出口相连通，第一导流段的第二端延伸至第二导流段；第二导流段沿设定圆的圆周方向延伸且与转子铁芯上的冷却液入口相连通，设定圆以端板的圆心为圆心，以中心通孔的半径尺寸、第一导流段的长度尺寸以及第二导流段的宽度尺寸的一半之和为半径；端板的外表面上设有进液流道避让标识；该结构能够满足电机转子内冷却液流量和流速设计要求，电机转子冷却充分，有效提高其冷却效率，且降低电机转子在动平衡校正时的失效率。
The present application relates to the field of motors, and in particular to an end plate of a motor rotor, a motor rotor assembly and a motor, wherein the end plate has an inner surface facing a rotor core, and a central through hole for a rotor shaft to pass through is opened at the center of the inner surface of the end plate; a liquid inlet flow channel is also formed on the inner surface of the end plate, and the liquid inlet flow channel includes a first guide section and a second guide section; the first guide section extends in the radial direction of the end plate, the first end of the first guide section extends to the central through hole and is connected to a coolant outlet on the rotor shaft, and the second end of the first guide section extends to the second guide section; the second guide section extends in the circumferential direction of a set circle and is connected to a coolant inlet on the rotor core, the set circle takes the center of the end plate as the center of the circle, and takes the sum of the radius of the central through hole, the length of the first guide section and half of the width of the second guide section as the radius; a liquid inlet flow channel avoidance mark is provided on the outer surface of the end plate; the structure can meet the design requirements of the coolant flow rate and flow velocity in the motor rotor, the motor rotor is fully cooled, its cooling efficiency is effectively improved, and the failure rate of the motor rotor during dynamic balancing correction is reduced.
Description
Technical Field
The application relates to the field of motors, in particular to an end plate of a motor rotor, a motor rotor assembly and a motor.
Background
With the rapid development of the new energy motor industry, the market demand for high-reliability, high-torque, high-power and high-rotation-speed motors is increasing, wherein the motor materials have a limit on the temperature, so that a reasonable cooling system is required to be designed for the high-performance motors.
At present, to the cooling mode of motor rotor, including through rotor pivot cooling rotor core internal surface to and through rotor pivot and the end plate of rotor (end cover plate's short for) with the cooling liquid introduction scheme such as inside the rotor core, all show simply slightly to the cooling liquid runner that sets up on the motor rotor end plate in each scheme, shape, structure, lead to the motor cooling insufficient, and cooling efficiency is lower. Meanwhile, when the motor rotor subjected to assembly is subjected to dynamic balance adjustment, the inner side cooling fluid flow channel cannot be observed, and the risk of mistakenly penetrating the inner side flow channel during punching exists, so that the cooling fluid flow channel is invalid, and even the motor rotor is scrapped.
Therefore, further optimization is needed for the overall structure of the motor rotor end plate.
Disclosure of utility model
The application aims to provide a novel motor rotor end plate, a motor rotor assembly and a motor, and aims to solve the technical problems that in the prior art, the motor rotor end plate is unreasonable in overall structure arrangement, insufficient in cooling and low in cooling efficiency, and the motor rotor is likely to fail in dynamic balance correction.
In order to achieve the purpose, on the one hand, the technical scheme adopted by the application is that an end plate of a motor rotor is provided, wherein the end plate is in a circular plate shape and is used for being covered at the end part of a rotor core, the end plate is provided with an inner surface facing the rotor core when being covered at the end part of the rotor core, a central through hole for a rotor rotating shaft to penetrate is formed in the inner surface of the end plate at the center of a circle, a liquid inlet channel is further formed in the inner surface of the end plate, the liquid inlet channel comprises a first guide section and a second guide section, the depth dimension of the first guide section and the depth dimension of the second guide section are smaller than the thickness dimension of the end plate, the first guide section extends along the radial direction of the end plate and is provided with a first end and a second end opposite end, the first end of the first guide section extends to the central through hole to be communicated with a cooling liquid outlet on the side wall of the rotor rotating shaft, the second end of the first guide section extends to the second guide section and is communicated with a cooling liquid outlet on the side wall of the second guide section, the second guide section extends along the set circumferential direction, the second guide section extends along the set length of the second guide section is opposite to the center of the end plate, and the radius of the end plate is set to be equal to the radius of the center of the end plate is set to the radius of the end plate on the side of the end plate and the center corresponds to the center of the end plate.
Further, the width dimension of the first flow guiding section is larger than the width dimension of the second flow guiding section, and/or the length dimension of the first flow guiding section is larger than the length dimension of the second flow guiding section, and/or the second end of the first flow guiding section is communicated with the middle part of the second flow guiding section, and the minimum distance from the middle part of the second flow guiding section to the edge of the center through hole is basically consistent with the minimum distance from the middle part of the second flow guiding section to the edge of the end plate.
Further, the end plate is further provided with a liquid outlet channel which is mutually spaced from the liquid inlet channel, the liquid outlet channel comprises a third guide section, a fourth guide section and an inner guide section which are sequentially communicated, the third guide section, the fourth guide section and the inner guide section are formed on the inner surface of the end plate, the depth of the third guide section and the depth of the fourth guide section are smaller than the thickness of the end plate, the third guide section extends along the circumferential direction of the set circle and is communicated with a cooling liquid outlet on the rotor core, the fourth guide section extends along the radial direction of the end plate and is provided with a third end close to the central through hole and a fourth end opposite to the third end, the third end of the fourth guide section is communicated with the third guide section, the inner guide section is provided with a liquid outlet communicated with the outside, and the inner guide section extends from the fourth end of the third guide section to the inner end plate in an inclined manner to the liquid outlet.
Further, the outer surface of the end plate is also provided with a liquid outlet channel avoiding mark.
The shape of the liquid inlet channel avoidance mark is consistent with the projection shape of the second guide section on the outer surface of the end plate, and/or the liquid outlet channel avoidance mark comprises a first mark section, a second mark section and a third mark section, wherein the shape of the first mark section is consistent with the projection shape of the third guide section on the outer surface of the end plate, the shape of the second mark section is consistent with the projection shape of the fourth guide section on the outer surface of the end plate, and the shape of the third mark section is consistent with the projection shape of the inner guide section on the outer surface of the end plate.
The liquid outlet flow passage avoidance mark is a circle with a circle center of the end plate and a radius which is not smaller than a set radius, the set radius is a larger value of the sum of the radius of the set circle and the width of the second flow guide section, the sum of the radius of the set circle and the width of the third flow guide section, the extending direction of the projection of the inner flow guide section on the inner surface is consistent with the extending direction of the fourth flow guide section, the width of the fourth flow guide section is consistent with the width of the inner flow guide section, and the shape of the liquid outlet flow passage avoidance mark is basically consistent with the shape of the part of the projection of the inner flow guide section on the outer surface of the end plate, which is positioned outside the liquid inlet flow passage avoidance mark.
Further, the liquid outlet is positioned in the middle of the side wall of the end plate, and/or the width sizes of the third flow guiding section, the fourth flow guiding section and the inner flow guiding section are basically consistent, and/or the length size of the third flow guiding section is smaller than the length size of the fourth flow guiding section.
Further, the end plate is provided with a plurality of liquid inlet channels and a plurality of liquid outlet channels, wherein the liquid inlet channels and the liquid outlet channels are consistent in shape and structure, the liquid inlet channels and the liquid outlet channels are consistent in number, and the liquid inlet channels and the liquid outlet channels are arranged outside Zhou Jiaocuo of the central through hole.
Further, the number of the liquid inlet flow channels and the number of the liquid outlet flow channels are four, and the included angle between the extending direction of the first flow guiding section of each liquid inlet flow channel and the extending direction of the fourth flow guiding section of the adjacent liquid outlet flow channel is 45 degrees.
Further, the second diversion section of each liquid inlet flow channel is consistent with the third diversion section of each liquid outlet flow channel in shape and structure.
The number of the end plates is two, namely a first end plate and a second end plate, the first end plate and the second end plate are respectively arranged at two ends of the rotor core in a covering mode, the four liquid inlet channels of the first end plate are respectively communicated with the four liquid outlet channels of the second end plate in a one-to-one correspondence mode, and the four liquid inlet channels of the second end plate are respectively communicated with the four liquid outlet channels of the first end plate in a one-to-one correspondence mode.
Compared with the prior art, the end plate of the motor rotor provided by the application is circular plate-shaped and has the inner surface facing the rotor core, and the inner surface of the end plate is provided with a central through hole at the center of the circle for the rotor rotating shaft to pass through; the inner surface of the end plate is also provided with a liquid inlet flow channel, the liquid inlet flow channel comprises a first flow guiding section and a second flow guiding section, the first flow guiding section extends along the radial direction of the end plate and is provided with a first end and a second end which are opposite, the first end of the first flow guiding section extends to the central through hole to be communicated with a cooling liquid outlet on the rotor rotating shaft, and the second end of the first flow guiding section extends to the second flow guiding section and is communicated with the second flow guiding section; the second guide section is convenient to process, and is obtained through CFD simulation optimization analysis, the oil duct structure can meet the design requirements of the flow rate and the flow velocity of the cooling liquid in the motor rotor, the cooling liquid is thrown out from the rotor rotating shaft, enters the cooling liquid inlet on the end face of the rotor core through the first guide section and the second guide section, cools the interior of the rotor core, ensures that the motor rotor is sufficiently cooled, effectively improves the cooling efficiency of the motor rotor, and simultaneously provides a visual machine adding area when the motor rotor is corrected by arranging a liquid inlet channel avoidance mark on the outer surface of the motor rotor, great convenience is provided for balance correction, the drill bit is prevented from damaging the oil passage area on the inner side of the end plate, and the failure probability of the end plate is reduced.
The second aspect of the application provides a motor rotor assembly, which comprises a rotor rotating shaft, a rotor iron core and any one of the end plates of the motor rotor, wherein the rotor iron core is sleeved on the rotor rotating shaft, the end plates are sleeved on the rotor rotating shaft and cover the end parts of the rotor iron core, a cooling liquid outlet is formed in the side wall of the rotor rotating shaft, a cooling liquid inlet is formed in the end face of the rotor iron core, the first end of a first diversion section of the end plates is communicated with the cooling liquid outlet in the rotor rotating shaft, and the second diversion section of the end plates is communicated with the cooling liquid inlet in the rotor iron core. Compared with the prior art, the motor rotor assembly has the advantages that the rotor core and the internal magnetic steel are cooled in a short distance and high efficiency through optimizing the cooling liquid flow passage structure among the rotor rotating shaft, the rotor core and the motor rotor end plate, the cooling effect is better, meanwhile, the liquid inlet flow passage avoiding mark is arranged on the outer surface of the end plate, the assembly of the motor rotor assembly is facilitated, and the failure rate of the motor rotor assembly in dynamic balance correction is reduced.
A third aspect of the present application provides an electric machine comprising the electric machine rotor assembly described above. Compared with the prior art, the motor provided by the application has the beneficial effects that the rotor core and the internal magnetic steel of the motor can realize close-range efficient cooling, the motor is good in cooling effect, the reliability and performance limit of the motor can be obviously improved finally, and the motor is convenient to assemble by arranging the liquid inlet channel avoiding mark on the outer surface of the motor rotor end plate, so that the failure rate of the motor is effectively reduced.
Other advantages and technical effects of the preferred embodiments of the present application will be further described in the following detailed description.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic plan view of a motor rotor assembly provided in an embodiment of the present application;
Fig. 2 is a schematic perspective view of a rotor shaft according to an embodiment of the present application;
Fig. 3 (1), fig. 3 (2), fig. 3 (3), and fig. 3 (4) are respectively a schematic diagram of a flow path of the rotor internal cooling liquid, a schematic diagram of a plane of an inner surface of the first end plate, and a schematic diagram of a plane of an inner surface of the second end plate according to an embodiment of the present application;
fig. 4 is a schematic perspective view of an end plate and a rotor shaft according to an embodiment of the present application;
FIG. 5 is a schematic plan view of the outer surface of a conventional end plate;
FIG. 6 is a schematic plan view of the outer surface of an end plate provided in accordance with one embodiment of the present application;
Fig. 7 is a schematic perspective view of the outer surface of an end plate according to another embodiment of the present application.
Wherein, each reference sign in the figure:
1-a rotor core, 2-a first end plate, 3-a second end plate, 4-a rotor rotating shaft, 5-a lock nut, 21-a liquid inlet flow passage of the first end plate, 22-a liquid outlet flow passage of the first end plate, 31-a liquid inlet flow passage of the second end plate, 32-a liquid outlet flow passage of the second end plate, 41-a cooling liquid inlet of the rotor rotating shaft, 42-a cooling liquid outlet of the rotor rotating shaft, 6-a liquid inlet flow passage avoiding mark, 7-a liquid outlet flow passage avoiding mark, 100-a liquid outlet and an A-punchable area.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
As shown in fig. 1 to 7, an end plate of a motor rotor according to an embodiment of the present application may be a motor rotor end plate of an embedded permanent magnet synchronous motor applied to a new energy automobile, which is disc-shaped and is used for covering an end portion of a rotor core 1, and may be specifically covered at least one end of the rotor core 1, where the end plate is disc-shaped, and both end surfaces of the end plate may be understood to be circular and have a certain thickness, and specifically, the end plate has an inner surface facing the rotor core 1 when being covered at the end portion of the rotor core 1, and the inner surface of the end plate is provided with a central through hole at a center of a circle for the rotor shaft 4 to pass through, alternatively, referring to fig. 2, 3 (3) and 3 (4), a key slot may be formed at an edge of the central through hole for connecting the end plate and the rotor shaft 4 by a key, and may be connected in other manners. The inner surface of the end plate is also provided with a liquid inlet flow channel, the liquid inlet flow channel comprises a first guide section and a second guide section, the depth dimension of the first guide section and the depth dimension of the second guide section are smaller than the thickness dimension of the end plate, and as can be understood, the first guide section and the second guide section do not penetrate through the end plate along the thickness direction of the end plate, preferably, the depth dimension of the first guide section and the depth dimension of the second guide section are the same; the first guide section extends along the radial direction of the end plate, that is, the first guide section is in a straight line shape, and one end of the first guide section points to the center of the inner surface of the end plate, specifically, the first guide section has a first end and a second end which are opposite, the first end of the first guide section extends to the central through hole to be communicated with the cooling liquid outlet 42 on the side wall of the rotor rotating shaft 4, as shown in fig. 3 (3) and fig. 3 (4), wherein the cooling liquid can be water-cooling liquid or oil-cooling liquid, and the cooling liquid can be selected according to practical situations, and is exemplified by cooling machine oil; the second end of the first guide section extends to the second guide section and is communicated with the second guide section, further, the second guide section extends along the circumferential direction of a set circle and is communicated with a cooling liquid inlet on the end face of the rotor core 1, the set circle can be understood as an extension reference circle of the second guide section in the length direction, the guide section has a certain width, after the width dimension of the second guide section is determined, the size and the position of the set circle can be determined, specifically, the set circle takes the center of a circle of an end plate as a circle center and takes the sum of the radius dimension of a central through hole, the length dimension of the first guide section and half of the width dimension of the second guide section as a radius, the end plate is provided with an outer surface opposite to the inner surface, a liquid inlet channel avoidance mark 6 is arranged on the outer surface of the end plate, the liquid inlet channel avoiding mark 6 can be in various patterns and shapes, and can provide references for avoiding the liquid inlet channel for the machined lightening hole during rotor balance correction.
According to the end plate of the motor rotor, the rotor rotating shaft 4, the first guide section and the second guide section are reasonably arranged, so that cooling liquid thrown out from the rotor rotating shaft 4 can flow to the second guide section through the first guide section, then enters a cooling liquid inlet on the end face of the rotor core 1 from the second guide section to cool the interior of the rotor core 1, the motor rotor is sufficiently cooled, the cooling efficiency of the motor rotor is effectively improved, the shape of the second guide section is convenient to process, the cooling liquid channel structure can meet the design requirements of the cooling liquid flow and the flow velocity in the motor rotor through CFD simulation optimization analysis, meanwhile, when the motor rotor is subjected to balance correction, a visible machining area is provided, great convenience is provided for balance correction, the oil channel area on the inner side of the end plate is avoided, and the failure probability is reduced.
Further, referring to fig. 3 and 4 together, as a specific embodiment of the end plate of the motor rotor provided by the application, the width dimension of the first flow guiding section is greater than the width dimension of the second flow guiding section, further alternatively, the length dimension of the first flow guiding section is greater than the length dimension of the second flow guiding section, further alternatively, the second end of the first flow guiding section is communicated with the middle part of the second flow guiding section, and the two sections are in a substantially T-shaped structure, and the minimum distance from the middle part of the second flow guiding section to the edge of the central through hole is substantially consistent with the minimum distance from the middle part of the second flow guiding section to the edge of the end plate. The cooling liquid flow channel structures are obtained through CFD simulation optimization analysis, so that the design requirements of the flow and the flow speed of cooling liquid in the motor rotor can be met, and the cooling effect of the motor rotor is good.
In an embodiment of the present application, as shown in fig. 3 and fig. 4, the end plate is further provided with a liquid outlet channel spaced from the liquid inlet channel, and as can be understood, the liquid inlet channel and the liquid outlet channel on the same end plate are not communicated with each other, the liquid outlet channel comprises a third guide section, a fourth guide section and an inner guide section which are sequentially communicated, the third guide section and the fourth guide section are formed on the inner surface of the end plate, the inner guide section is formed inside the end plate, the depth of the third guide section and the depth of the fourth guide section are smaller than the thickness of the end plate, the third guide section and the fourth guide section do not penetrate the end plate in the thickness direction of the end plate, the third guide section extends along the circumferential direction of the set circle and is communicated with a cooling liquid outlet on the rotor core 1, the second guide section and the third guide section are arranged along the circumference of the same circle, the third guide section and the third guide section are conveniently arranged in a limited space on the end plate, the third guide section and the fourth guide section are reasonably structured, the fourth guide section is formed inside the end plate, the third guide section and the fourth guide section is radially extended from the center of the end plate to the end plate, the third guide section is also obliquely arranged to the inner end plate 100, and the liquid outlet end plate is opposite to the outer end plate, and the liquid outlet end plate is opposite to the third end plate, and the liquid outlet end plate is arranged at a high end plate, and the end plate is opposite to the end plate, and the liquid outlet end plate is capable of being connected to the third end plate.
As further optimization, the outer surface of the end plate is also provided with a liquid outlet channel avoidance mark 7, the liquid outlet channel avoidance mark 7 can be in various patterns and shapes, and references for avoiding the liquid outlet channel can be provided for the machined lightening holes during rotor balance correction.
As can be seen from FIG. 5, the outer surface of the conventional end plate has no corresponding flow passage avoidance mark, which is most likely to cause end plate failure during balance correction, and referring to FIG. 6, in one embodiment, the shape of the flow inlet passage avoidance mark 6 is consistent with the projection shape of the second flow guiding section on the outer surface of the end plate, and the structure is easy to process and identify, so that damage to the flow inlet passage of the end plate during rotor balance correction is effectively prevented.
Optionally, the liquid outlet flow passage avoidance mark 7 comprises a first mark section, a second mark section and a third mark section, wherein the shape of the first mark section is consistent with the projection shape of the third guide section on the outer surface of the end plate, the shape of the second mark section is consistent with the projection shape of the fourth guide section on the outer surface of the end plate, and the shape of the third mark section is consistent with the projection shape of the inner guide section on the outer surface of the end plate, namely the three mark sections of the liquid outlet flow passage avoidance mark 7 can display the three guide section positions of the liquid outlet flow passage in a one-to-one correspondence mode so as to form protection on the liquid outlet flow passage of the end plate during rotor balance correction.
In one embodiment of the present application, referring to fig. 7, the intake runner avoidance mark 6 may be a circle with a center of an end plate as a center and a size not smaller than a set radius size as a radius, the set radius size is a larger value of a sum of the radius size of the set circle and a width size of the second diversion section, and a sum of the radius size of the set circle and a width size of the third diversion section, and the radius size of the specific intake runner avoidance mark 6 may be selected according to practical situations, preferably equal to the set radius size, and the intake runner avoidance mark 6 is easy to process, is easy to identify, and effectively prevents damage to the intake runner of the end plate during rotor balance correction.
Further, the extending direction of the projection of the inner guide section on the inner surface is consistent with the extending direction of the fourth guide section, the width dimensions of the fourth guide section and the inner guide section are consistent, the shape of the liquid outlet passage avoidance mark 7 is basically consistent with the shape of the part, located outside the liquid inlet passage avoidance mark 6, of the projection of the fourth guide section and the inner guide section on the outer surface of the end plate, and likewise, the liquid outlet passage avoidance mark 7 is easy to process, convenient to identify and effectively prevents damage to the liquid outlet passage of the end plate during rotor balance correction.
Optionally, the liquid outlet 100 is positioned in the middle of the side wall of the end plate, so that the stator end winding can be efficiently cooled by means of high-speed oil bundles thrown out of the liquid outlet 100 of the end plate, and the structure is reasonable.
The structure is convenient to process and ensures the design requirements of the flow and the flow speed of the cooling liquid in the motor rotor, thereby effectively ensuring the better cooling effect of the motor rotor.
Further, a plurality of liquid inlet channels and a plurality of liquid outlet channels are arranged on the end plate, wherein the liquid inlet channels and the liquid outlet channels are consistent in shape and structure, the liquid inlet channels and the liquid outlet channels are consistent in number, and the liquid inlet channels and the liquid outlet channels are arranged outside Zhou Jiaocuo of the central through hole. Further, the number of the liquid inlet channels and the liquid outlet channels is four, and the included angle between the extending direction of the first guiding section of each liquid inlet channel and the extending direction of the fourth guiding section of the adjacent liquid outlet channel is 45 degrees, and the specific angle position is shown in fig. 3, which can be understood that the application designs four liquid inlet channels and four liquid outlet channels uniformly distributed on the end plate in a staggered and circumferential manner. By further optimizing, combining with the figures 3 and 4, the second diversion section of each liquid inlet flow channel and the third diversion section of each liquid outlet flow channel are consistent in shape and structure, the structure is convenient to process, the design requirements of the flow and the flow speed of the cooling liquid in the motor rotor are guaranteed, the better cooling effect of the motor rotor is further effectively guaranteed, and the cooling efficiency of the motor rotor is high.
In an embodiment of the present application, referring to fig. 1 and 3, the number of the end plates is two, namely, the first end plate 2 and the second end plate 3 are respectively disposed at the left end and the right end of the rotor core 1, the number and the size of the liquid inlet channels and the liquid outlet channels of the two end plates of the rotor are determined by means of motor cooling flow field simulation, so as to achieve the purpose of uniform cooling of the front end and the rear end of the rotor, in this embodiment, the four liquid inlet channels 21 of the first end plate 2 are respectively in one-to-one correspondence with the four liquid outlet channels 32 of the second end plate 3, the four liquid inlet channels 31 of the second end plate 3 are respectively in one-to-one correspondence with the four liquid outlet channels 22 of the first end plate 2, preferably, the liquid outlet position of the liquid inlet channel 21 of the first end plate 2 is in a straight line, and the liquid inlet position of the liquid outlet channel 32 of the second end plate 3 is preferably parallel to the axis of the rotor shaft, and simultaneously, the liquid outlet position of the liquid inlet channel 31 of the second end plate 3 is preferably in a straight line, and the liquid inlet position of the liquid outlet channel 22 of the first end plate 2 is also preferably parallel to the axis of the rotor shaft.
As shown in fig. 3 (1) and 3 (2), the rotor shaft 4 may be hollow, the right end is a cooling liquid inlet 41, the left and right ends of the rotor shaft 4 are designed with evenly distributed radial channels and cooling liquid outlets 42, the cooling liquid flows into the first end plate 2 (left) and the second end plate 3 (right) of the rotor through the rotor shaft 4, then flows into the rotor core 1 assembly, and cools the rotor, specifically, as shown in fig. 3 (1), the cooling liquid flows into the first end plate 2 of the rotor through the radial oil duct after flowing into the left end along the axial direction, flows into the rotor core 1 assembly through the inlet channel 21 of the first end plate 2, flows into the second end plate 3 of the rotor along the axial direction, finally flows out of the liquid outlet 100 on the side wall of the second end plate 3 through the outlet channel 32 of the second end plate 3, flows into the second end plate 3 of the rotor through the inlet of the right end of the rotor shaft 4 along the axial direction, flows into the second end plate 3 of the rotor core 1 through the inlet channel 31 of the second end plate 3, flows out of the side wall of the first end plate 2 through the outlet channel 2, and finally flows out of the side wall 2 of the first end plate 2 through the outlet channel 2.
It should be noted that the cooling liquid has a high flow rate under the action of high-speed centrifugal force, and can be directly sprayed to the end of the motor stator winding to cool the winding. In the embodiment of the application, correspondingly, eight channels of cooling liquid which are in staggered circulation are formed in the rotor core 1 assembly, so that the rotor core 1 and the magnetic steel can be cooled in a short distance, the cooling effect is better, oil is respectively fed from the left end and the right end of the rotor core 1 assembly, the left end and the right end of the rotor core 1 can be uniformly cooled, the temperature of the left end and the right end of the rotor is uniform, the rotor is sufficiently cooled, and the motor is beneficial to outputting higher performance.
On the other hand, referring to fig. 1, the application provides a motor rotor assembly, which comprises a rotor shaft 4, a rotor core 1 and any one of the end plates of the motor rotor, wherein the rotor core 1 is sleeved on the rotor shaft 4, the end plates are sleeved on the rotor shaft 4 and cover the end parts of the rotor core 1, a cooling liquid outlet 42 is formed in the side wall of the rotor shaft 4, a cooling liquid inlet is formed in the end surface of the rotor core 1, a first end of a first diversion section of the end plates is communicated with the cooling liquid outlet 42 in the rotor shaft 4, and a second diversion section of the end plates is communicated with the cooling liquid inlet in the rotor core 1. Compared with the prior art, the motor rotor assembly provided by the application has the advantages that the rotor rotating shaft 4, the rotor iron core 1 and the cooling liquid flow passage structure between the motor rotor end plates are optimized, so that the rotor iron core 1 and the internal magnetic steel are cooled at a short distance and high efficiency, the cooling effect is better, meanwhile, the liquid inlet flow passage avoiding mark 6 is arranged on the outer surface of the end plates, the assembly of the motor rotor assembly is facilitated, and the failure rate of the motor rotor assembly in dynamic balance correction is reduced.
In one embodiment, as shown in fig. 1, the rotor assembly structure of the embedded permanent magnet synchronous motor comprises a rotor core 1, a first end plate 2, a second end plate 3, a rotor rotating shaft 4, a lock nut 5 and the like. The rotor core 1, the first end plate 2 and the second end plate 3 are sleeved on the rotor rotating shaft 4 in sequence according to the assembly sequence, and finally the components are pressed and fixed by the lock nuts 5. When the motor rotor assembly is installed, the liquid inlet channels on the end plates are required to be aligned with the cooling liquid outlet 42 of the rotor rotating shaft 4, cooling liquid enters through the cooling liquid axial oil passage inlet of the rotor rotating shaft 4 and flows through the left and right radial oil passages of the rotor rotating shaft 4, engine oil respectively flows into the liquid inlet channels on the first end plate 2 and the second end plate 3 of the rotor under the action of oil pressure and rotating centrifugal force, the liquid inlet channels on one end plate guide the engine oil to flow into the rotor core 1, the inside of the rotor is directly cooled, and finally, the engine oil is thrown out from the liquid outlet channel of the other end plate, and the high-speed oil beam cools the end winding of the stator.
In addition, fig. 5 is a rotor baffle in the conventional case, and fig. 6 and 7 are rotor baffles with embossed de-weight ranges according to the present application. In order to avoid mistaken breakdown of an inner oil duct by an end plate machining lightening hole, the application provides a convenient method for marking the oil duct on the outer side of a rotor end plate, wherein the outline of an inner surface flow channel is marked on the outer sides of a first end plate 2 and a second end plate 3 of a rotor by utilizing the technologies such as machining, laser printing or embossing, so that the inner oil duct of the end plate is avoided, and a machining lightening hole area (namely a punching area A) is visualized. Meanwhile, based on the impression mark (the inlet flow channel avoiding mark 6 and the outlet flow channel avoiding mark 7), a better reference angle is provided for the balanced punching operation, the material reduction balance efficiency is greatly improved, and the effect is more remarkable especially under the condition of mass production.
In yet another aspect, referring to fig. 1, the present application provides an electric motor including the above-mentioned electric motor rotor assembly. Compared with the prior art, the motor provided by the application has the advantages that the rotor core 1 and the internal magnetic steel can realize close-range efficient cooling, the cooling effect of the motor is good, the reliability and performance limit of the motor can be obviously improved finally, and the liquid inlet channel avoiding mark 6 and/or the liquid outlet channel avoiding mark 7 are arranged on the outer surface of the motor rotor end plate, so that the motor is convenient to assemble, and the failure rate of the motor is effectively reduced.
It is to be understood that the above examples of the present application are provided for clarity of illustration only and are not limiting of the embodiments of the present application. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are desired to be protected by the following claims.
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420541378.1U CN222464269U (en) | 2024-03-19 | 2024-03-19 | Motor rotor end plate, motor rotor assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420541378.1U CN222464269U (en) | 2024-03-19 | 2024-03-19 | Motor rotor end plate, motor rotor assembly and motor |
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| Publication Number | Publication Date |
|---|---|
| CN222464269U true CN222464269U (en) | 2025-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420541378.1U Active CN222464269U (en) | 2024-03-19 | 2024-03-19 | Motor rotor end plate, motor rotor assembly and motor |
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| Country | Link |
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| CN (1) | CN222464269U (en) |
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