TWM652902U

TWM652902U - Rotor structure

Info

Publication number: TWM652902U
Application number: TW112214361U
Authority: TW
Inventors: 張金鋒; 朱智盟; 張辰輝; 陳建勲
Original assignee: 富田電機股份有限公司
Priority date: 2023-12-29
Filing date: 2023-12-29
Publication date: 2024-03-11

Abstract

一種轉子結構包含鐵心片、二環蓋以及中空轉軸。鐵心片具有一水平側面以及複數個減重孔呈等角度排列。每一環蓋具有一水平內側面以接觸鐵心片的最外側的水平側面，環蓋的水平內側面具有導引凸塊與減重孔逐一對應。導引凸塊的端面形成導槽，環蓋的油路入口位於環蓋的內環面，油路出口位於環蓋的外環面。鐵心片、二環蓋套設於中空轉軸，環蓋的油路入口流體地連接中空轉軸的注油孔。導引凸塊能夠減緩被離心力甩出油路的流速，讓入油與出油的油量保持一致。A rotor structure includes a core piece, a two-ring cover and a hollow rotating shaft. The core piece has a horizontal side and a plurality of weight-reducing holes arranged at equal angles. Each ring cover has a horizontal inner side to contact the outermost horizontal side of the core piece, and the horizontal inner side of the ring cover has guide protrusions corresponding to the weight-reducing holes one by one. The end face of the guide bump forms a guide groove, the oil channel inlet of the ring cover is located on the inner ring surface of the ring cover, and the oil channel outlet is located on the outer ring surface of the ring cover. The core piece and the second ring cover are sleeved on the hollow rotating shaft, and the oil passage inlet of the ring cover is fluidly connected to the oil filling hole of the hollow rotating shaft. The guide bump can slow down the flow rate of the oil that is thrown out of the oil circuit by centrifugal force, so that the amount of oil in and out is consistent.

Description

轉子結構Rotor structure

本創作關於一種轉子結構，更精確的說，該轉子結構具有能夠改善二側表面的溫度分布的流道結構。This invention relates to a rotor structure. To be more precise, the rotor structure has a flow channel structure that can improve the temperature distribution on both side surfaces.

電機轉子在高速旋轉時會產生高溫，需要在內部設置冷卻油路幫助散熱。其中一種轉子油路設置是，從轉子的中空軸心注入冷卻液，轉子鐵心開設複數個穿孔，由穿孔本身形成軸向冷卻油路，或者於穿孔放入油管形成軸向冷卻油路，冷卻油路的入油孔流體的連接至中空軸心，冷卻油路的出油孔位於最外側的鐵心(或兩側端蓋)。鐵心的內部油路可以設置鐵心的任意位置，例如冷卻油路可以鄰近鐵心內部的永久磁鐵周圍，或使冷卻液直接接觸流過永久磁鐵。The motor rotor will generate high temperatures when rotating at high speed, and a cooling oil circuit needs to be installed internally to help dissipate heat. One of the rotor oil circuit settings is to inject coolant from the hollow axis of the rotor, and open a plurality of perforations in the rotor core. The perforations themselves form an axial cooling oil circuit, or an oil pipe is placed in the perforations to form an axial cooling oil circuit. The cooling oil The oil inlet hole of the cooling oil circuit is fluidly connected to the hollow shaft center, and the oil outlet hole of the cooling oil circuit is located on the outermost core (or end caps on both sides). The internal oil circuit of the core can be set at any position of the core. For example, the cooling oil circuit can be adjacent to the permanent magnets inside the core, or the coolant can directly contact and flow through the permanent magnets.

藉由轉子的離心力，冷卻液將從軸心徑向導入鐵心中，接著從鐵心的兩側徑向導出至出油孔。但若鐵心與鐵心之間組配存在公差，或鐵心與二側端蓋之間因材質相異而於組配後產生公差，鐵心與鐵心之間、或者鐵心與端蓋之間貼合的表面間將存在縫隙。在轉動時的慣性作用下，從中空軸心導出至鐵心的流體會沿著切線方向甩出，由貼合表面之間的縫隙流出，無法確實地進入轉子內部，這也意味著，複數個軸心流道的在同一時間內所含的油量皆不相同。再者，冷卻液若未完全進入油路，將導致內部油量分布不均勻，也會使轉子內部不同流道的流速存在差異，影響熱交換速率，尤其是影響位於兩側端蓋的溫度分布。By the centrifugal force of the rotor, the coolant will be radially introduced into the core from the axis, and then radially directed out from both sides of the core to the oil outlet. However, if there are tolerances in the assembly between the iron core and the two side end caps, or there is a tolerance between the iron core and the end caps on both sides due to different materials after assembly, the surface between the iron core and the iron core, or between the iron core and the end caps, will There will be gaps. Under the action of inertia during rotation, the fluid led from the hollow shaft center to the iron core will be thrown out along the tangential direction, flow out through the gap between the fitting surfaces, and cannot reliably enter the interior of the rotor. This also means that multiple shafts The flow channels of the heart contain different amounts of oil at the same time. Furthermore, if the coolant does not completely enter the oil circuit, it will lead to uneven distribution of internal oil volume, and will also cause differences in the flow rates of different channels inside the rotor, affecting the heat exchange rate, especially the temperature distribution at the end caps on both sides. .

基於上述目的，本創作提供一種轉子結構，包含至少一鐵心片、二環蓋以及中空轉軸。至少一鐵心片具有水平側面以及複數個穿孔，多個穿孔主要由複數個減重孔與複數個磁鐵安裝孔所組成，減重孔的輪廓相同、與圓心等距離並呈等角度排列。環蓋具有水平內側面，以接觸鐵心片的最外側的水平側面，水平內側面具有複數個導引凸塊與減重孔逐一對應，每一個導引凸塊的端面形成導槽的一部分，一些導槽的另一部分形成流道入口位於環蓋的內環面，另一些導槽的另一部分形成流道出口位於環蓋的外環面，流道入口與流道出口是沿著周向交錯設置。鐵心片、二環蓋套設於中空轉軸的外側，環蓋的流道入口流體地連接中空轉軸的注油孔。導引凸塊相對於水平內側面進入減重孔的內部。Based on the above purpose, the present invention provides a rotor structure, including at least one core piece, two ring covers and a hollow rotating shaft. At least one core piece has a horizontal side and a plurality of perforations. The plurality of perforations are mainly composed of a plurality of weight-reducing holes and a plurality of magnet mounting holes. The weight-reducing holes have the same outline, are equidistant from the center of the circle, and are arranged at equal angles. The ring cover has a horizontal inner side to contact the outermost horizontal side of the core piece. The horizontal inner side has a plurality of guide bumps corresponding to the weight reduction holes one by one. The end face of each guide bump forms a part of the guide groove. Some of the guide bumps form a part of the guide groove. Another part of the guide groove forms a flow channel inlet located on the inner annular surface of the ring cover, and another part of the guide groove forms a flow channel outlet located on the outer annular surface of the ring cover. The flow channel inlet and the flow channel outlet are staggered along the circumferential direction. . The core piece and the two ring covers are sleeved on the outside of the hollow rotating shaft, and the flow channel inlet of the ring cover is fluidly connected to the oil filling hole of the hollow rotating shaft. The guide lug enters the interior of the weight relief hole relative to the horizontal inner side.

導引凸塊用來阻擋從貼合表面滲出的冷卻液，以及降低冷卻液從二側環蓋進入鐵心片的流道的流速，增加冷卻液在軸心停留的時間，充分地與軸心作熱交換。The guide bumps are used to block the coolant seeping from the fitting surface, and reduce the flow rate of the coolant from the two side ring covers into the flow channel of the core piece, increase the time the coolant stays on the axis, and fully interact with the axis. heat exchange.

較佳地，中空轉軸的內部設有導油管具有沿著軸向分布的複數個導油孔，讓中空轉軸內部的冷卻液有指向性與限制流量。Preferably, an oil guide pipe is provided inside the hollow rotating shaft and has a plurality of oil guide holes distributed along the axial direction, so that the coolant inside the hollow rotating shaft has directivity and restricts the flow rate.

較佳地，導引凸塊的側表面與端面的邊界具有圓角，當冷卻液從鐵心導引至環蓋時，容易沿著邊界順利流動。Preferably, the boundary between the side surface and the end surface of the guide bump has a rounded corner, so that when the coolant is guided from the core to the ring cover, it is easy to flow smoothly along the boundary.

較佳地，導引凸塊的外輪廓是間隔於減重孔的輪廓如此一來，導引凸塊還具有將滲出的冷卻液導引至軸向冷卻流道的作用，使內部油量穩定。Preferably, the outer contour of the guide bump is spaced apart from the contour of the weight reduction hole. In this way, the guide bump also has the function of guiding the leaked coolant to the axial cooling flow channel to stabilize the internal oil volume. .

較佳地，導槽的另一部分形成相對於水平內側面是凹陷的徑向導槽，用以維持穩定流速。Preferably, another part of the guide groove forms a radial guide groove that is concave relative to the horizontal inner surface to maintain a stable flow rate.

較佳地，徑向導槽與形成於導引凸塊的導槽之間的邊界為弧形導槽，進一步減緩冷卻液從徑向流入/流出徑向導槽的流速。Preferably, the boundary between the radial guide groove and the guide groove formed in the guide protrusion is an arc-shaped guide groove, which further slows down the flow rate of the cooling liquid flowing radially into/out of the radial guide groove.

較佳地，導引凸塊的一側表面的一部分朝向中空轉軸，部分的側表面具有朝向周向延伸的一弧面，用以盡可能地減少冷卻液分散至流道的外側。Preferably, a part of the side surface of the guide bump faces the hollow rotating shaft, and part of the side surface has an arc surface extending in the circumferential direction to minimize the dispersion of the cooling liquid to the outside of the flow channel.

較佳地，鐵心片的數量是複數個並沿著一周向偏移。Preferably, the number of core pieces is plural and offset along a circumferential direction.

請參閱圖1至圖7，繪示轉子的內部結構。轉子結構包含轉子鐵心20、環蓋40A,40B以及中空轉軸50。轉子鐵心20包含至少一鐵心片21。中空轉軸50的具有外擴的底座55位於一側面、以及一外環面56。Please refer to Figures 1 to 7, which illustrate the internal structure of the rotor. The rotor structure includes a rotor core 20 , ring covers 40A, 40B and a hollow rotating shaft 50 . The rotor core 20 includes at least one core piece 21 . The hollow rotating shaft 50 has an expanded base 55 located on one side and an outer annular surface 56 .

環蓋40A、轉子鐵心20、環蓋40B依序套入中空轉軸50的外環面56，環蓋40A的內環面被限制在底座55的內側。外環面56與鐵心片21內環面的結構匹配，使鐵心片21與中空轉軸50同步轉動。前述結構匹配可以是例如，定位鐵心片21內環面具有凸塊215套入外環面56的軸向凹槽561，作輔助定位。端部鎖固件10從中空轉軸50的另一側面鎖固，以夾持環蓋40B，形成轉子內部的冷卻油路。The ring cover 40A, the rotor core 20 and the ring cover 40B are inserted into the outer ring surface 56 of the hollow rotating shaft 50 in sequence, and the inner ring surface of the ring cover 40A is limited to the inside of the base 55 . The structure of the outer ring surface 56 matches the inner ring surface of the core piece 21 so that the core piece 21 and the hollow rotating shaft 50 rotate synchronously. The aforementioned structural matching can be, for example, the inner annular surface of the positioning core piece 21 has a protrusion 215 that fits into the axial groove 561 of the outer annular surface 56 for auxiliary positioning. The end fastener 10 is locked from the other side of the hollow rotating shaft 50 to clamp the ring cover 40B to form a cooling oil passage inside the rotor.

鐵心片21具有位於二側且呈現水平、彼此平行的鐵心側面211,212、以及複數個穿孔貫穿鐵心側面211,212。穿孔包含複數個減重孔23與複數個磁鐵安裝孔24，每一個減重孔23的輪廓相同、與一圓心等距離並呈等角度排列，除了減輕轉子的重量，減重孔23也用來定義鐵心內部的軸向流道；複數個磁鐵安裝孔24相對於減重孔23是遠離該圓心，用以容置永久磁鐵30。The core piece 21 has core side surfaces 211 and 212 located on two sides that are horizontal and parallel to each other, and a plurality of perforations penetrating through the core side surfaces 211 and 212 . The perforations include a plurality of weight-reducing holes 23 and a plurality of magnet mounting holes 24. Each weight-reducing hole 23 has the same outline, is equidistant from the center of a circle, and is arranged at equal angles. In addition to reducing the weight of the rotor, the weight-reducing holes 23 are also used to Define the axial flow channel inside the iron core; a plurality of magnet mounting holes 24 are away from the center of the circle relative to the weight reduction holes 23 to accommodate the permanent magnets 30 .

相對於在鐵心內部個別形成減重孔(形成中空通道)與流道孔(形成流道)，於本實施態樣，直接採用減重孔形成流道，可以增加減重孔流道尺寸與流道儲油量，在相同的冷卻液注入速度下，減少冷卻液流速，使其與鐵心內部充分進行熱交換。在較佳的實施態樣中，減重孔23盡可能的貼近磁鐵安裝孔24，讓冷卻液帶走永久磁鐵30的高溫。Compared with forming the weight-reducing holes (forming hollow channels) and flow channels (forming flow channels) individually inside the core, in this embodiment, the weight-reducing holes are directly used to form the flow channels, which can increase the flow channel size and the oil storage capacity of the weight-reducing holes. Under the same coolant injection speed, the coolant flow rate is reduced, so that it can fully exchange heat with the core. In a preferred embodiment, the weight-reducing holes 23 are as close as possible to the magnet mounting holes 24, so that the coolant can take away the high temperature of the permanent magnet 30.

對照習知技術，雖然在磁鐵安裝孔的周圍開設與磁鐵安裝孔連通的流道孔，讓冷卻液直接地接觸永久磁鐵，也能達成降溫的作用。但若該流道孔的尺寸太小，將導致冷卻液的流阻過大，在徑向流道與軸向流道的交接處，冷卻液難以直接透過旋轉時的離心力，將冷卻液導入或導出小尺寸的流道孔。整個冷卻油路的流速亦不均勻，影響轉子整體的溫度分布。在該習知技術中，若在相鄰元件的貼合表面同時存在縫隙，實際上進入冷卻油路的冷卻液可能更少，可能只有在轉子靜止時，冷卻液無法立即流出鐵心二側的出油孔，讓內部的冷卻液累積，累積的冷卻液進入鐵心的入油孔之中。因此，在運轉時冷卻液不連續的情況下，熱交換的效果就顯得有限。In contrast to the conventional technology, although a flow channel hole connected to the magnet mounting hole is provided around the magnet mounting hole so that the coolant can directly contact the permanent magnet, the cooling effect can also be achieved. However, if the size of the flow channel hole is too small, the flow resistance of the coolant will be too large. At the intersection of the radial flow channel and the axial flow channel, it will be difficult for the coolant to directly pass through the centrifugal force during rotation to introduce or export the coolant. Small size flow hole. The flow rate of the entire cooling oil circuit is also uneven, affecting the overall temperature distribution of the rotor. In this conventional technology, if there are gaps on the bonding surfaces of adjacent components, less coolant may actually enter the cooling oil circuit. It may be that only when the rotor is stationary, the coolant cannot immediately flow out of the outlets on both sides of the core. The oil hole allows the internal coolant to accumulate, and the accumulated coolant enters the oil inlet hole of the iron core. Therefore, when the coolant is discontinuous during operation, the effect of heat exchange is limited.

於本實施態樣中，環蓋40A,40B的結構相同。以環蓋40A為例，具有水平內側面401以及外側面402，內側面401接觸轉子鐵心20最外側的鐵心側面212，外側面402遠離轉子鐵心20並朝向外側。環蓋40A的水平內側面401具有複數個導引凸塊41與複數個減重孔23的數量與位置逐一對應。在轉子組裝完成時，導引凸塊41相對於水平內側面401進入減重孔23的內部，意即，導引凸塊41是位於減重孔23於鐵心片21內部形成的內環壁231之中，也能使環蓋40A與鐵心片21(中空轉軸50)同步轉動。In this embodiment, the structures of the ring covers 40A and 40B are the same. Taking the ring cover 40A as an example, it has a horizontal inner side 401 and an outer side 402. The inner side 401 contacts the outermost core side 212 of the rotor core 20 and the outer side 402 is away from the rotor core 20 and toward the outside. The horizontal inner surface 401 of the ring cover 40A has a plurality of guide protrusions 41 and a plurality of weight-reducing holes 23 corresponding in number and position. When the rotor assembly is completed, the guide bump 41 enters the inside of the weight reduction hole 23 relative to the horizontal inner surface 401 , that is, the guide bump 41 is located on the inner annular wall 231 formed by the weight reduction hole 23 inside the core piece 21 In this case, the ring cover 40A and the core piece 21 (the hollow rotating shaft 50) can also be rotated synchronously.

每一個導引凸塊41具有側表面411以及端面412，一些導引凸塊41形成入油導槽451的一部分，另一些導引凸塊41形成出油導槽452的一部分。入油導槽451是沿著導引凸塊41的端面412以及側表面411向內凹陷，形成轉折的流道，沿著導引凸塊41的側表面411向軸心延伸，於環蓋40A的內側面401凹陷形成筆直的徑向導槽461，接著於環蓋40A的內環面403形成流道入口45A。出油導槽452是沿著導引凸塊41的端面412以及側表面411向內凹陷，形成轉折的流道，沿著導引凸塊41的側表面411向外側延伸，於環蓋40A的內側面401凹陷形成筆直的徑向導槽462，接著於環蓋40A的外環面404形成流道出口45B。Each guide bump 41 has a side surface 411 and an end surface 412 . Some guide bumps 41 form a part of the oil inlet guide groove 451 , and other guide bumps 41 form a part of the oil outlet guide groove 452 . The oil inlet guide groove 451 is recessed inward along the end surface 412 and the side surface 411 of the guide bump 41 to form a turning flow channel, which extends toward the axis along the side surface 411 of the guide bump 41 and ends at the ring cover 40A. The inner surface 401 of the ring cover 40A is recessed to form a straight radial guide groove 461, and then a flow channel inlet 45A is formed on the inner ring surface 403 of the ring cover 40A. The oil outlet guide groove 452 is recessed inward along the end surface 412 and the side surface 411 of the guide convex block 41 to form a turning flow channel, and extends outward along the side surface 411 of the guide convex block 41 and ends at the ring cover 40A. The inner surface 401 is recessed to form a straight radial guide groove 462, and then a flow channel outlet 45B is formed on the outer ring surface 404 of the ring cover 40A.

整體而言，本實施態樣的冷卻油路方向為，轉子冷卻油路從中空轉軸50的軸心注入，從中空轉軸50二側的注油孔511,512流入環蓋40A(40B)的流道入口45A，接著，進入轉子鐵心20內部，再從另一側的環蓋40B(40A)的流道出口45B導出至轉子外側。Generally speaking, the direction of the cooling oil path in this embodiment is that the rotor cooling oil path is injected from the axis center of the hollow rotating shaft 50 , and flows into the flow channel inlet 45A of the ring cover 40A (40B) from the oil injection holes 511 and 512 on both sides of the hollow rotating shaft 50 , then enters the inside of the rotor core 20 and is led out from the flow channel outlet 45B of the ring cover 40B (40A) on the other side to the outside of the rotor.

請參閱圖6與圖7，同樣是以環蓋40A為例，當環蓋40A的側表面411與最外側的鐵心側面212接觸，入油導槽451、出油導槽452、徑向導槽461,462即被封閉，剩下內環面403的流道入口45A與注油孔511(如圖3)對接，外側面402的流道出口45B朝向外側。環蓋40A的流道入口45A與流道出口45B沿著周向交錯設置，環蓋40A的流道入口45A與環蓋40B的流道出口45B流體連接於同一個軸向的冷卻油路，環蓋40B的流道入口45A與環蓋40A的流道出口45B流體連接於同一個軸向的冷卻油路。環蓋40A的流道入口45A對準注油孔511，環蓋40B的流道入口45A對準注油孔512(如圖3)，使得沿著周向環繞轉子鐵心20相鄰流道的流動方向交錯，能使整個轉子鐵心20的溫度分布更均勻。Please refer to Figures 6 and 7. Taking the ring cover 40A as an example, when the side surface 411 of the ring cover 40A contacts the outermost core side 212, the oil inlet guide groove 451, the oil outlet guide groove 452, and the radial guide grooves 461, 462 That is, it is closed, leaving the flow channel inlet 45A of the inner ring surface 403 butting with the oil injection hole 511 (as shown in FIG. 3 ), and the flow channel outlet 45B of the outer surface 402 facing outward. The flow channel inlet 45A and the flow channel outlet 45B of the ring cover 40A are staggered along the circumferential direction. The flow channel inlet 45A of the ring cover 40A and the flow channel outlet 45B of the ring cover 40B are fluidly connected to the same axial cooling oil circuit. The flow channel inlet 45A of the cover 40B and the flow channel outlet 45B of the ring cover 40A are fluidly connected to the same axial cooling oil passage. The flow channel inlet 45A of the ring cover 40A is aligned with the oil filling hole 511, and the flow channel inlet 45A of the ring cover 40B is aligned with the oil filling hole 512 (as shown in Figure 3), so that the flow directions of adjacent flow channels surrounding the rotor core 20 along the circumferential direction are staggered. , can make the temperature distribution of the entire rotor core 20 more uniform.

除了導引凸塊41表面形成的入油導槽451與出油導槽452，由於導引凸塊41凸出於水平內側面401，複數個導引凸塊41沿著圓周作等角度排列，導引凸塊41其餘表面(側表面411)可以阻擋從鐵心片21與環蓋40A之間的水平貼合表面(401,212)滲入的冷卻液，減少冷卻液分散至流道的外側，冷卻液也只能累積在側表面411前方的水平貼合表面，冷卻液更容易進入流道入口45A，使內部油量穩定。In addition to the oil inlet guide groove 451 and the oil outlet guide groove 452 formed on the surface of the guide bump 41, since the guide bump 41 protrudes from the horizontal inner side 401, a plurality of guide bumps 41 are arranged at equal angles along the circumference. The remaining surfaces (side surfaces 411) of the guide bumps 41 can block the cooling liquid from penetrating from the horizontal fitting surfaces (401, 212) between the core piece 21 and the ring cover 40A, reducing the cooling liquid from dispersing to the outside of the flow channel, and the cooling liquid is also It can only accumulate on the horizontal fitting surface in front of the side surface 411, and the coolant can more easily enter the flow channel inlet 45A, making the internal oil volume stable.

另外，依照柏努力原理，速度與壓力成反比，在轉子旋轉時，高速液體撞擊環蓋40A導引凸塊41的側表面411或入油導槽451時，液體的瞬時速度降低，使液體的壓力增加，增加液體在軸心停留的時間，充分增加液體與軸心熱交換量，進而保持在流道內部的油量穩定。In addition, according to the Bolois principle, the speed is inversely proportional to the pressure. When the rotor rotates, when the high-speed liquid hits the side surface 411 of the guide bump 41 of the ring cover 40A or the oil guide groove 451, the instantaneous speed of the liquid decreases, causing the liquid to The increase in pressure increases the time the liquid stays on the axis, fully increasing the amount of heat exchange between the liquid and the axis, and thus keeping the amount of oil inside the flow channel stable.

請參閱圖5，除了前述結構之外，在較佳的實施態樣中，導引凸塊41與減重孔23的輪廓相對應，導引凸塊41的側表面411的一部分朝向中空轉軸50，該部分的側表面411具有朝向周向分布的弧面413，盡可能地減少冷卻液分散至流道的外側。前述所提的輪廓相對應，指的是導引凸塊41與減重孔23的輪廓與尺寸完全一致、或者輪廓形狀相同但尺寸不同。Please refer to FIG. 5 . In addition to the aforementioned structure, in a preferred embodiment, the guide bump 41 corresponds to the outline of the weight reduction hole 23 , and a part of the side surface 411 of the guide bump 41 faces the hollow rotating shaft 50 , the side surface 411 of this part has a circumferentially distributed arc surface 413 to minimize the dispersion of cooling liquid to the outside of the flow channel. The aforementioned corresponding contours means that the contours and sizes of the guide bump 41 and the weight-reducing hole 23 are completely consistent, or the contour shapes are the same but the sizes are different.

除了前述結構之外，在其他實施態樣中，請參閱圖2，中空轉軸50的內部設有導油管53，導油管53具有沿著軸向分布的複數個導油孔531。藉此，讓中空轉軸50內部的冷卻液有指向性與限制流量，減少轉子在旋轉產生的瞬間轉速，而改變入油的流體速率。In addition to the foregoing structure, in other embodiments, please refer to FIG. 2 , an oil guide pipe 53 is provided inside the hollow rotating shaft 50 , and the oil guide pipe 53 has a plurality of oil guide holes 531 distributed along the axial direction. This allows the coolant inside the hollow rotating shaft 50 to have directivity and restrict the flow rate, thereby reducing the instantaneous rotation speed of the rotor and changing the fluid flow rate into the oil.

除了前述結構之外，在其他實施態樣中，導引凸塊41的一側表面411與端面412的邊界還可以具有圓角414。藉此，當冷卻液從轉子鐵心20導引至環蓋40A(40B)時，能更沿著邊界的圓角414順利流動。In addition to the foregoing structure, in other embodiments, the boundary between one side surface 411 and the end surface 412 of the guide bump 41 may also have a rounded corner 414 . Thereby, when the coolant is guided from the rotor core 20 to the ring cover 40A (40B), it can flow more smoothly along the boundary fillet 414.

除了前述結構之外，在其他實施態樣中，導引凸塊41的側表面411形成的外輪廓與減重孔23的輪廓之間還可以存在間隔G，相關具體結構請參閱圖5與圖7。滲入的冷卻液被導引凸塊41的側表面411所阻擋，再次引入減重孔23，保持流道內部的油量穩定，兩側流道出口45B的壓力較為一致，連帶改善二側出油量，使轉子二側溫度較為均勻。In addition to the foregoing structure, in other embodiments, there may be a gap G between the outer contour formed by the side surface 411 of the guide bump 41 and the contour of the weight-reducing hole 23. Please refer to FIG. 5 and FIG. 7. The penetrating coolant is blocked by the side surface 411 of the guide bump 41 and is introduced into the weight-reducing hole 23 again to keep the oil volume inside the flow channel stable. The pressure at the outlet 45B of the flow channels on both sides is relatively consistent, which also improves the oil output on both sides. amount to make the temperature on both sides of the rotor more uniform.

除了前述結構之外，在其他實施態樣中，徑向導槽461與形成於導引凸塊41的入油導槽451(或出油導槽452)之間的邊界還可以呈現內凹的弧形導槽471，進一步減緩徑向流入/流出徑向導槽461的流速，延長冷卻液保在減重孔23的時間，進行充分的熱交換。In addition to the foregoing structure, in other embodiments, the boundary between the radial guide groove 461 and the oil inlet guide groove 451 (or the oil outlet guide groove 452) formed on the guide bump 41 may also present a concave arc. The shape of the guide groove 471 further slows down the flow rate of the radial inflow/outflow of the radial guide groove 461, prolongs the time that the coolant remains in the weight reduction hole 23, and performs sufficient heat exchange.

於圖1所示的實施態樣中，轉子鐵心20的鐵心片21的數量是複數個，多個鐵心片21沿著中空轉軸50的外環面的軸向凹槽561層疊並定位，使對應的減重孔23沿著軸向堆疊，不同層鐵心片21的減重孔23於轉子內部形成互不交錯的複數個流道。然而，前述實施態樣中的結構導致也可以呈現在由一個鐵心片21構成轉子鐵心20，二個環蓋40A,40B的水平內側面401分別貼合於鐵心片21的前側鐵心側面211與後側鐵心側面212。In the embodiment shown in FIG. 1 , the number of core pieces 21 of the rotor core 20 is plural. The plurality of core pieces 21 are stacked and positioned along the axial grooves 561 on the outer ring surface of the hollow rotating shaft 50 so that corresponding The weight-reducing holes 23 are stacked along the axial direction, and the weight-reducing holes 23 of different layers of core sheets 21 form a plurality of non-interlaced flow channels inside the rotor. However, the structure in the aforementioned embodiment can also be presented in a case where the rotor core 20 is composed of one core piece 21, and the horizontal inner sides 401 of the two ring covers 40A and 40B are respectively attached to the front core side 211 and the rear core side 211 of the core piece 21. Side core side 212.

除了前述結構之外，在其他實施態樣中，不同層的鐵心片21可以沿著圓周方向以作等角度的偏移，鐵心片21的減重孔23亦沿著周向偏移，使得軸向的冷卻油路形成傾斜流道。In addition to the aforementioned structures, in other embodiments, the core sheets 21 of different layers can be offset at equal angles along the circumferential direction, and the weight-reducing holes 23 of the core sheets 21 are also offset along the circumferential direction, so that the axis The cooling oil path in the direction forms an inclined flow channel.

在本實施態樣中，連通同一個軸向冷卻油路的環蓋40A的徑向導槽461與環蓋40B的徑向導槽462沒有在同一直線上。然而，於其他實施態樣中，連通同一個軸向冷卻油路的環蓋40A的(入油導槽451的)徑向導槽461也可以對準環蓋40B(出油導槽452的)的徑向導槽462。In this embodiment, the radial guide groove 461 of the annular cover 40A and the radial guide groove 462 of the annular cover 40B connected to the same axial cooling oil circuit are not on the same straight line. However, in other embodiments, the radial guide groove 461 (of the oil inlet guide groove 451) of the annular cover 40A connected to the same axial cooling oil circuit can also be aligned with the radial guide groove 462 (of the oil outlet guide groove 452) of the annular cover 40B.

10:端部鎖固件 20:轉子鐵心 21:鐵心片 211,212:鐵心側面 215:凸塊 23:減重孔 231:內環壁 24:磁鐵安裝孔 30:永久磁鐵 40A,40B:環蓋 401:內側面 402:外側面 403:內環面 404:外環面 41:導引凸塊 411:側表面 412:端面 413:弧面 414:圓角 45A:流道入口 45B:流道出口 451:入油導槽 452:出油導槽 461,462:徑向導槽 471:弧形導槽 50:中空轉軸 511,512:注油孔 53:導油管 531:導油孔 55:底座 56:外環面 561:軸向凹槽 G:間隔 10: End lock piece 20:Rotor core 21:Iron core piece 211,212: Iron core side 215: Bump 23: Weight reduction hole 231:Inner ring wall 24:Magnet mounting hole 30:Permanent magnet 40A, 40B: Ring cover 401: Medial side 402:Outer side 403:Inner ring surface 404: Outer ring surface 41:Guide bump 411:Side surface 412: End face 413:Curved surface 414: rounded corners 45A:Flow channel entrance 45B: Runner outlet 451: Oil guide groove 452:Oil outlet guide groove 461,462: Radial guide groove 471:Arc guide groove 50: Hollow shaft 511,512: Oil filling hole 53:Oil guide pipe 531: Oil guide hole 55:Base 56: Outer ring surface 561: Axial groove G: interval

圖1是轉子結構示意圖。Figure 1 is a schematic diagram of the rotor structure.

圖2是轉子結構的***圖。Figure 2 is an exploded view of the rotor structure.

圖3、圖4是冷卻油路示意圖。Figures 3 and 4 are schematic diagrams of the cooling oil circuit.

圖5是其中一側轉子鐵心的部分與環蓋的示意圖。Figure 5 is a schematic diagram of one side of the rotor core part and the ring cover.

圖6是位在出油導槽的冷卻油路示意圖。Figure 6 is a schematic diagram of the cooling oil circuit located in the oil outlet channel.

圖7是位在入油導槽的冷卻油路示意圖。Figure 7 is a schematic diagram of the cooling oil circuit located in the oil inlet groove.

211,212:鐵心側面 211,212: Iron core side

215:凸塊 215: Bump

231:內環壁 231:Inner ring wall

24:磁鐵安裝孔 24:Magnet mounting hole

30:永久磁鐵 30:Permanent magnet

40A:環蓋 40A: Ring cover

401:內側面 401: Medial side

402:外側面 402: Outer surface

403:內環面 403:Inner ring surface

404:外環面 404: Outer ring surface

411:側表面 411:Side surface

412:端面 412: End face

413:弧面 413:Curved surface

414:圓角 414: rounded corners

45B:流道出口 45B: Runner outlet

452:出油導槽 452:Oil outlet guide groove

462:徑向導槽 462: Radial guide groove

471:弧形導槽 471:Arc guide groove

Claims

一種轉子結構，包含：至少一鐵心片，具有一水平側面以及複數個穿孔，該些穿孔由複數個減重孔與複數個磁鐵安裝孔所組成，該些減重孔的一輪廓相同、與一圓心等距離並呈等角度排列；二環蓋，每一該環蓋具有一水平內側面以接觸該鐵心片的最外側的該水平側面，該水平內側面具有複數個導引凸塊與該些減重孔逐一對應，每一該導引凸塊的一端面形成一導槽的一部分，其中一些該導槽的另一部分形成一流道入口位於該些環蓋的內環面，另一些該導槽的另一部分形成一流道出口位於該些環蓋的外環面，該流道入口與該流道出口是沿著周向交錯設置；一中空轉軸，該鐵心片、該二環蓋套設於該中空轉軸的外側，該環蓋的該流道入口流體地連接該中空轉軸的一注油孔；其中，該些導引凸塊相對於該水平內側面進入該些減重孔的內部。 A rotor structure containing: At least one core piece has a horizontal side and a plurality of perforations. The perforations are composed of a plurality of weight-reducing holes and a plurality of magnet mounting holes. The contours of the weight-reducing holes are the same, equidistant from a center of a circle, and at equal angles. arrangement; Two ring covers, each of which has a horizontal inner side to contact the outermost horizontal side of the core piece, and the horizontal inner side has a plurality of guide bumps corresponding to the weight reduction holes, each of which One end surface of the guiding convex block forms part of a guide groove, and in some of them, the other part of the guide groove forms the first flow channel inlet located on the inner ring surface of the ring cover, and in some cases, the other part of the guide groove forms the first flow channel outlet located on the inner ring surface of the ring cover. On the outer ring surface of the ring cover, the flow channel inlet and the flow channel outlet are staggered along the circumferential direction; A hollow rotating shaft, the core piece and the two ring covers are sleeved on the outside of the hollow rotating shaft, and the flow channel inlet of the ring cover is fluidly connected to an oil filling hole of the hollow rotating shaft; Wherein, the guide protrusions enter the interior of the weight reduction holes relative to the horizontal inner surface.

如請求項1所述之轉子結構，其中，該中空轉軸的內部設有一導油管具有沿著軸向分布的複數個導油孔。The rotor structure of claim 1, wherein an oil guide pipe is provided inside the hollow rotating shaft and has a plurality of oil guide holes distributed along the axial direction.

如請求項1所述之轉子結構，其中，該導引凸塊的一側表面與該端面之間的邊界具有圓角。The rotor structure as claimed in claim 1, wherein the boundary between one side surface of the guide protrusion and the end surface has a rounded corner.

如請求項1所述之轉子結構，其中，該導引凸塊的外輪廓是間隔於該減重孔的該輪廓。The rotor structure as claimed in claim 1, wherein the outer contour of the guide protrusion is spaced apart from the contour of the weight-reducing hole.

如請求項1所述之轉子結構，其中，該導槽的另一部分形成相對於該水平內側面是凹陷的一徑向導槽。The rotor structure as claimed in claim 1, wherein another part of the guide groove forms a radial guide groove that is recessed relative to the horizontal inner side.

如請求項5所述之轉子結構，其中，該徑向導槽與形成於該導引凸塊的該導槽之間的邊界為一弧形導槽。The rotor structure of claim 5, wherein the boundary between the radial guide groove and the guide groove formed on the guide bump is an arcuate guide groove.

如請求項1所述之轉子結構，其中，該導引凸塊的一側表面的一部分朝向該中空轉軸，該部分的該側表面具有朝向周向延伸的一弧面。The rotor structure as claimed in claim 1, wherein a part of the side surface of the guide protrusion faces the hollow rotating shaft, and the side surface of the part has an arc extending toward the circumferential direction.

如請求項1所述之轉子結構，其中，該鐵心片的數量是複數個，該些鐵心片沿著一周向偏移。The rotor structure as claimed in claim 1, wherein the number of the core pieces is a plurality, and the core pieces are offset along a circumferential direction.