WO2012111374A1 - 回転電機のケース - Google Patents
回転電機のケース Download PDFInfo
- Publication number
- WO2012111374A1 WO2012111374A1 PCT/JP2012/050942 JP2012050942W WO2012111374A1 WO 2012111374 A1 WO2012111374 A1 WO 2012111374A1 JP 2012050942 W JP2012050942 W JP 2012050942W WO 2012111374 A1 WO2012111374 A1 WO 2012111374A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- case
- cooling
- ribs
- opening
- central axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
Definitions
- the present invention relates to a case of an internal rotation type rotating electrical machine.
- This application claims priority on February 18, 2011 based on Japanese Patent Application No. 2011-033526 filed in Japan, the contents of which are incorporated herein by reference.
- an internal rotation type motor in which an annular stator is fixed inside a case, and a rotor rotates inside the stator.
- the stator is configured by winding a coil in a plurality of slots of a stator core, and a rotor having a permanent magnet is rotated by a rotating magnetic field generated by flowing a three-phase current through the coil, for example.
- the coil and the stator core When a current is passed through the stator coil, the coil and the stator core generate heat, and the temperature of the stator core rises.
- the heat of the stator core is dissipated to the cooling fluid through the case by providing a cooling passage inside the case and circulating the cooling fluid through the cooling passage without relying only on natural heat radiation to the outside air.
- There is a rotating electrical machine configured to positively suppress the temperature rise of the stator.
- the columnar pillars connecting the inner wall and the outer wall of the case are dispersed in the cooling passage.
- a rib is provided on the outer surface of the outer wall of the case (see, for example, Patent Document 1).
- the structure in which the columnar pillars are dispersed and arranged in the cooling passage makes the core parting at the time of casting complicated, increases the man-hours for core sand removal, and increases the manufacturing cost. Furthermore, if the columnar pillars are distributed and arranged in the cooling passage, it becomes difficult to control the flow direction of the cooling fluid flowing through the cooling passage.
- the present invention has been made in view of such circumstances, and an object of the present invention is to provide a case of a rotating electrical machine that can reduce costs and easily control the flow of a cooling fluid while improving rigidity and preventing surface vibration.
- a rotating electrical machine case is a cylindrical rotating electrical machine case disposed on the outer peripheral side of a stator of an inversion-type rotating electrical machine, and the case is disposed inside the case.
- a rib that connects a radially inner wall portion and a radially outer wall portion along the circumferential direction, and is spaced apart from each other in the axial direction of the case to divide the cooling passage into a plurality of ribs;
- the cooling fluid inlet is disposed on one end side in the axial direction of the cooling passage defined by the rib, with the central axis thereof being disposed in parallel with the axial direction of the case.
- Cold The rib communicates with the passage, and the rib penetrates from one side of the cooling passage along the central axis to the other side of the direction along the central axis on an extension of the central axis of the cooling fluid inlet.
- a plurality of the ribs are provided, and the opening provided in each of the ribs is centered on the extension line of the central axis of the cooling fluid inlet.
- the opening of the rib which is circular and has an opening area of the rib disposed on the other side in the direction along the central axis from the opening of the rib disposed on the one side in the direction along the central axis You may get smaller as you go to.
- a plurality of the ribs are provided, and the center of the opening provided in each of the ribs is disposed on one side in the direction along the central axis.
- the rib may be gradually shifted in the circumferential direction from the opening of the rib toward the opening of the rib disposed on the other side in the direction along the central axis.
- the rib is positioned at the circumferential position between the cooling fluid inlet and the cooling fluid outlet.
- the cooling passage may have a second opening penetrating from the one axial side to the other axial side, and an expansion chamber communicating with the cooling passage may be provided in the vicinity of the second opening. .
- the radially inner wall portion and the radially outer wall portion of the cooling passage are connected along the circumferential direction by ribs. For this reason, the rigidity of the case is improved, and the surface vibration of the outer peripheral portion of the case can be suppressed.
- the cooling passage has a structure in which ribs are provided along the circumferential direction, the shape of the cooling passage is simplified, and the core mold part and the core can be easily removed during casting. The remaining amount can be greatly reduced. As a result, the number of sand removal steps can be reduced, and the production cost can be reduced. Furthermore, by providing the rib along the circumferential direction, the cooling water heat transfer area of the rib increases.
- the cooling fluid can easily flow in the circumferential direction and pressure loss is reduced, resulting in cooling capacity. Will improve.
- the rib is provided with an opening on the central axis extension line of the cooling fluid inlet, the cooling fluid flowing in from the cooling fluid inlet is also distributed in the direction of the central axis by passing through the opening. Distributed in the circumferential direction. Accordingly, the cooling fluid can be distributed to each fluid passage defined by the ribs. Further, by reducing the height of the rib, it is possible to increase the flow rate of the cooling fluid and increase the cooling capacity. Further, by reducing the height of the rib, the case can be reduced in size and weight, and as a result, the rotating electrical machine can be reduced in size and weight.
- the cooling fluid flowing from the cooling fluid inlet can be uniformly distributed in the central axis direction.
- the cooling fluid flowing through the cooling passage flows into the expansion chamber and becomes a turbulent flow, so that cooling near the expansion chamber can be promoted.
- FIG. 4 is a cross-sectional view taken along line AA in FIG. 3.
- FIG. 4 is a perspective view at the time of cutting in the diameter direction in the position containing a cooling fluid inlet and a cooling fluid outlet.
- FIG. 4 is a sectional view taken along line BB in FIG. 3.
- FIG. 7 is a cross-sectional view corresponding to FIG. 6 in the case of the rotating electrical machine according to the second embodiment. It is the figure which showed CC section of FIG. 8 typically.
- FIGS. 1 to 9 a rotating electrical machine case according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.
- the rotating electrical machine in this embodiment is an aspect as a motor, and is particularly an aspect as a motor mounted on a vehicle as a driving source for traveling.
- FIGS. 1 to 7 the case of the rotating electrical machine according to the first embodiment will be described with reference to FIGS. 1 to 7.
- reference numeral 1 denotes a case of an internal rotation type motor (rotary electric machine).
- Reference numeral 50 denotes a stator of the motor, and the stator 50 is fixed inside the case 1. That is, the case 1 is disposed outside the stator 50.
- the stator 50 includes a plurality of teeth 54 formed so as to protrude radially inward in an annular stator core 51 and a plurality of teeth 54 formed between adjacent teeth 54, 54.
- a rotor (not shown) is disposed inside the stator 50, and a rotating magnetic field is generated by passing a three-phase current through the coil 53, whereby the rotor rotates.
- Case 1 is made of aluminum and manufactured by aluminum die casting or gravity casting.
- the case 1 has a ring shape so as to surround the outer periphery of the stator 50, and the axial length of the case 1 is longer than the axial length of the stator core 51.
- the axial direction of the case 1 coincides with the axial direction of the rotor (the axial direction of the stator 50).
- a cooling passage 2 through which cooling water (cooling fluid) can flow is formed inside the case 1.
- a cooling water inlet hole (cooling fluid inlet) 4 for introducing cooling water is provided on the end surface 3 on one end side in the axial direction of the case 1 with its central axis arranged in parallel with the axial direction of the case 1.
- a cooling water outlet hole (cooling fluid outlet) 6 for discharging the cooling water is provided at a portion which is approximately the center in the axial direction of the outer peripheral surface 5 of the case 1 and spaced apart from the cooling water inlet hole 4 by about 180 degrees in the circumferential direction.
- the central axis is provided so as to be perpendicular to the axial direction of the case 1.
- the cooling water inlet hole 4 and the cooling water outlet hole 6 communicate with the cooling passage 2.
- the cooling passage 2 is formed by removing the sand mold core set in the mold when the case 1 is cast.
- the outer peripheral surface 5 of the case 1 has three core support holes 7a, 7b, and 7c for positioning and supporting the core in the radial direction in the mold (hereinafter referred to as “ Child support holes 7 ”) are provided at intervals of 90 degrees in the circumferential direction.
- Child support holes 7 are provided at intervals of 90 degrees in the circumferential direction.
- the core support hole 7b disposed at the center in the circumferential direction is spaced from the cooling water inlet hole 4 by about 30 degrees in the circumferential direction.
- the other core support holes 7a and 7c are respectively spaced apart from the cooling water outlet hole 6 or the cooling water inlet hole 4 by about 60 degrees in the circumferential direction.
- the core support hole 7 communicates with the cooling passage 2 and also serves as a sand discharge hole for discharging the core sand after casting. As shown in FIGS. 1 and 2, the core support hole 7 is closed by a cap 60 when the stator 50 is a finished product.
- FIG. 3 is an overall cross-sectional view of the case 1 cut in a direction orthogonal to the axial direction.
- 4 is a cross-sectional view taken along the line AA in FIG.
- FIG. 5 is a perspective view of the case 1 cut in the diameter direction at a position including the cooling water inlet hole 5 and the cooling water outlet hole 7.
- 6 is a cross-sectional view taken along the line BB of FIG.
- the case 1 has a stator attachment portion 10 formed in the center in the axial direction, and connection end portions 11, 11 provided on both sides in the axial direction of the stator attachment portion 10.
- the cooling passage 2 is formed inside the stator mounting portion 10, and has an inner wall portion 12 formed radially inward of the cooling passage 2, an outer wall portion 13 formed radially outward, and an axial direction. It is surrounded by the connecting end portions 11 on both sides and has a ring shape.
- the thickness of the cooling passage 2 i.e., the distance between the inner wall portion 12 and the outer wall portion 13, It is larger than the position.
- the portions other than the vicinity of the cooling water inlet hole 4 and the cooling water outlet hole 6 have the same dimensions both in the circumferential direction and in the axial direction.
- the inner diameter of the inner wall portion 12 in the stator mounting portion 10 is slightly smaller than the inner diameter of the connecting end portion 11.
- the stator 50 is fitted and fixed to the inner wall portion 12 by a method such as shrink fitting, and the inner peripheral surface of the inner wall portion 12 and the outer peripheral surface of the stator core 51 are formed in surface contact.
- the thermal conductivity between the stator core 51 and the case 1 is improved.
- the heat of the stator core 51 is easily radiated to the cooling water or air through the case 1, and the cooling performance is improved.
- the cooling passage 2 includes three ribs 14 ⁇ / b> A, 14 ⁇ / b> B, 14 ⁇ / b> C that are spaced apart from each other in the axial direction of the case 1 (hereinafter referred to as “ Rib 14 ”) and divided into four in the axial direction.
- Rib 14 when it is necessary for explanation, it is distinguished from the cooling passages 2a, 2b, 2c, and 2d.
- the rib 14 connects the inner wall portion 12 and the outer wall portion 13 along the circumferential direction. Adjacent ribs 14 are arranged so as to be parallel to each other.
- each rib 14 is divided into a plurality in the circumferential direction.
- each rib 14 is formed with an opening (second opening) 15 at the position where the core support holes 7a, 7b, 7c are disposed, and the cooling water outlet hole 6 is formed.
- the opening 16 is formed at the position where the is disposed, the opening 17 is formed between the openings 15 and 15, and the opening 18 is formed between the opening 15 and the opening 16.
- Each of the ribs 14A, 14B, and 14C has circular through holes (openings) 19A, 19B, and 19C for distributing the cooling water on the extension of the central axis of the cooling water inlet hole 4 (hereinafter referred to as “penetrating if it is not necessary to distinguish between them).
- a hole 19 is formed so as to penetrate in the central axis direction.
- the center of each through hole 19 is located on the central axis extension line of the cooling water inlet hole 4.
- FIGS. 5 and 6 when the opening areas of these through holes 19A, 19B, and 19C are compared, the opening area of the through hole 19A of the rib 14A disposed on the side closest to the cooling water inlet hole 4 is the same. The biggest.
- the opening area of the through hole 19B of the rib 14B arranged in the middle of the central axis direction is smaller than the opening area of the through hole 19A, and the opening area of the through hole 19C of the rib 14C arranged farthest from the cooling water inlet hole 4 Is smaller than the opening area of the through hole 19B. That is, as the distance from the cooling water inlet hole 4 increases, the opening area of the through hole 19 decreases.
- the opening area ratio of each through hole can be freely set.
- the through passage may be (3/4) S
- the opening area of the through hole 19B may be (1/2) S
- the opening area of the through hole 19C may be (1/4) S.
- FIG. 7 is a perspective view showing only the fluid passage 2.
- the flow of cooling water in case 1 will be described with reference to FIG.
- the cooling water that has flowed in from the cooling water inlet hole 4 flows into the first cooling passage 2 a closest to the cooling water inlet hole 4.
- a part of the cooling water that has flowed into the first cooling passage 2 a is split into two left and right along the circumferential direction of the first cooling passage 2 a and flows toward the cooling water outlet hole 6.
- the cooling water that did not flow in the circumferential direction of the first cooling passage 2a flows into the second cooling passage 2b through the through holes 19A of the ribs 14A.
- a part of the cooling water that has flowed into the second cooling passage 2 b is split into two left and right along the circumferential direction of the second cooling passage 2 b and flows toward the cooling water outlet hole 6.
- the cooling water that did not flow in the circumferential direction of the second cooling passage 2b flows into the third cooling passage 2c through the through hole 19B of the rib 14B.
- a part of the cooling water flowing into the third cooling passage 2c is divided into two left and right along the circumferential direction of the third cooling passage 2c and flows toward the cooling water outlet hole 6.
- the cooling water that has not flown in the circumferential direction of the third cooling passage 2c flows into the fourth cooling passage 2d through the through-hole 19C of the rib 14C, and moves in the left and right directions along the circumferential direction of the fourth cooling passage 2d.
- the cooling passages 2b, 2c communicate with each other through the opening 15. Even when the cap 60 is attached to the core support holes 7a, 7b, and 7c, the portions corresponding to the core support holes 7a, 7b, and 7c bulge radially outward as the expansion chambers. As shown in FIG. 7, the cooling water flowing through the cooling passages 2b and 2c flows into the core support holes 7a, 7b and 7c, and a turbulent flow is generated. As a result, the applicant has clarified from the analysis results that the cooling effect is increased in the expansion chambers (core support holes 7a, 7b, 7c).
- the inner wall portion 12 and the outer wall portion 13 are arranged along the circumferential direction by the ribs 14A, 14B, and 14C. Therefore, the rigidity of the case 1 is improved, and the surface vibration of the outer peripheral portion of the case 1 can be suppressed.
- the cooling passage 2 has a structure in which the ribs 14A, 14B, and 14C are provided along the circumferential direction, the shape of the cooling passage 2 is simplified, and the core mold during casting becomes easy. The child can easily remove sand, and the amount of sand remaining is reduced. As a result, the number of sand removal steps can be reduced and the production cost can be reduced.
- the cooling water heat transfer area of the ribs 14A, 14B, and 14C increases.
- the ribs 14A, 14B, and 14C are spaced apart from each other in the axial direction of the case 1, the cooling passage 2 is divided into four cooling passages 2a, 2b, 2c, and 2d. It becomes easy to flow in the direction and pressure loss is reduced. As a result, the cooling capacity is improved.
- the case 1 can be reduced in size and weight, and as a result, the motor can be reduced in size and weight.
- the rib 14 is provided with a through hole 19 on the central axis extension line of the cooling water inlet hole 4, the cooling water flowing from the cooling water inlet hole 4 passes through the through hole 19, thereby It is distributed in the axial direction and further distributed in the circumferential direction. Therefore, the cooling water can be distributed to the fluid passages 2a, 2b, 2c, 2d defined by the ribs 14.
- the opening area ratio of the through holes 19A, 19B, and 19C can be freely set according to the flow rate distribution method.
- the opening area of the central through hole 19B is maximized so that more cooling water flows through the cooling passages 2b and 2c than the cooling passages 2a and 2b. It is also possible. That is, depending on the size of the through hole 19 provided in the rib 14, it is possible to easily adjust the flow rate when the cooling water is distributed in the axial direction. Further, as described above, the cooling effect can be increased in the expansion chamber (core support holes 7a, 7b, 7c).
- FIG. 8 is a cross-sectional view corresponding to FIG. 6 in the case of the rotating electrical machine according to the first embodiment.
- FIG. 9 is a diagram schematically showing a CC cross section of FIG.
- the first is that the inner diameters of the cooling water inlet hole 4 and the through holes 19A, 19B, 19C formed in the ribs 14A, 14B, 14C are all the same. It is different from the case of the rotating electrical machine according to the embodiment.
- the through holes 19A, 19B, and 19C are arranged overlapping the central axis direction including the central axis extension line of the cooling water inlet hole 4, but the centers of the holes 4, 19A, 19B, and 19C are arranged.
- the difference from the case of the rotating electrical machine according to the first embodiment is that it is gradually shifted in the same direction in the circumferential direction.
- the substantial openings of the through holes 19A, 19B, and 19C are narrowed as indicated by solid line arrows R1, R2, and R3 in FIG. Therefore, the substantial opening area of the through hole 19 ⁇ / b> A can be made smaller than the opening area of the cooling water inlet hole 4.
- the substantial opening area of the through hole 19B can be made smaller than the substantial opening area of the through hole 19A
- the substantial opening area of the through hole 19C can be made smaller than the substantial opening area of the through hole 19B. That is, in the case of the rotating electrical machine according to the second embodiment, as in the case of the rotating electrical machine according to the first embodiment, the cooling water is distributed in the axial direction at a predetermined flow rate ratio (including equality). it can.
- the cooling water flows into the cooling passage 2 a from the cooling water inlet hole 4, the cooling water collides with a protrusion W ⁇ b> 1 protruding in the circumferential direction from the cooling water inlet hole 4 at the rib 14 ⁇ / b> A. Therefore, the cooling water flow rate Q1 flowing to the cooling passage 2a extending in the circumferential direction toward the side having the protruding portion W1 is larger than the cooling water flow rate Q2 flowing in the cooling passage 2a extending to the opposite side in the circumferential direction.
- the protruding portion W2 protruding in the circumferential direction from the through hole 19A in the rib 14B and the protruding portion W3 protruding in the circumferential direction from the through hole 19B in the rib 14C have the same action. That is, the cooling water flow rate Q1 flowing in the cooling passages 2b and 2c extending in the circumferential direction toward the side having the protrusions W2 and W3 is larger than the cooling water flow rate Q2 flowing in the cooling passages 2b and 2c extending in the circumferential direction opposite side.
- FIG. 9 shows a case where the cooling water is evenly distributed in the axial direction of the case 1.
- the axial direction of the case 1 coincides with the direction in which the axle extends, and a case where one side of the radial direction of the case 1 is arranged at the front of the vehicle body (Fr) and the other side is arranged at the rear of the vehicle body (Rr) is shown.
- the cooling capacity at the portion disposed on the rear side of the vehicle body in the case 1 is larger than the cooling capacity at the portion disposed on the front side of the vehicle body.
- the flow rate can be adjusted in the circumferential direction on the front side of the vehicle body and in the circumferential direction on the rear side of the vehicle body. Can be changed. Also in the case of the rotating electrical machine according to the second embodiment, similarly to the case of the rotating electrical machine according to the first embodiment, the flow rate adjustment is performed by changing the inner diameter of the through holes 19A, 19B, and 19C. Is also possible.
- the present invention is not limited to the embodiment described above.
- the number of ribs 14, the spacing between the ribs 14 (that is, the rib interval), and the flow distribution of the cooling fluid in the axial direction and the circumferential direction can be appropriately set according to the temperature distribution of the case 1.
- the rotating electrical machine is not limited to a motor, and may be a generator (generator) or a motor generator.
- the cooling fluid is not limited to cooling water, and may be a cooling liquid or a cooling gas.
- Cooling passage 4 Cooling water inlet hole (cooling fluid inlet) 6 Cooling water outlet hole (cooling fluid outlet) 12 Inner wall (wall on the inner side in the radial direction of the cooling passage) 13 Outer wall portion (wall portion on the outer side in the radial direction of the cooling passage) 14, 14A, 14B, 14C Rib 15 Opening (second opening)
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
本願は、2011年2月18日に、日本に出願された特願2011-033526号に基づき優先権を主張し、その内容をここに援用する。
上述のように内部に冷却通路を備えたケースでは、ケースの剛性を上げるために、冷却通路内に、ケースの内壁と外壁とを連結する円柱状の支柱を分散させて配置されている。また、ケースの外壁の面振動を防止するために、ケースの外壁の外表面にリブが設けられている(例えば、特許文献1参照)。
(1)すなわち、本発明の一態様に係る回転電機のケースは、内転型回転電機のステータの外周側に配置された筒状の回転電機のケースであって、このケースの内部に前記ケースの周方向に沿って設けられて冷却流体が流通可能な冷却通路と;前記冷却通路に連通する冷却流体インレットおよび冷却流体アウトレットと;前記冷却通路の内部に設けられ、前記冷却通路の前記ケースの径方向の内側の壁部と前記径方向の外側の壁部とを前記周方向に沿って連結し、前記ケースの軸方向に互いに離間して配置されて前記冷却通路を複数に区画するリブと;を備え、前記冷却流体インレットは、その中心軸を前記ケースの前記軸方向と平行に配置して、前記リブによって区画された前記冷却通路のうちの前記軸方向の一方の端部側に配置された冷却通路に連通し、前記リブは、前記冷却流体インレットの前記中心軸の延長線上で前記冷却通路における前記中心軸に沿った方向の一方側から前記中心軸に沿った方向の他方側に貫通する開口を有する。
更に、リブを周方向に沿って設けたことにより、リブの冷却水伝熱面積が増大する。加えて、リブをケースの軸方向に互いに離間して配置することで冷却通路を複数に区画しているので、冷却流体が周方向に流れ易くなって圧力損失が低減し、その結果、冷却能力が向上する。
その上、リブには、冷却流体インレットの中心軸延長線上に開口が設けられているので、冷却流体インレットから流入した冷却流体はこの開口を通過することによって、中心軸方向にも分配され、さらに周方向に分配される。したがって冷却流体をリブによって区画された各流体通路に分配できる。
また、リブの高さを低くすることにより、冷却流体の流速を上げ、冷却能力を高めることが可能である。また、リブの高さを低くすることにより、ケースの小型・軽量化を図ることができ、ひいては回転電機の小型・軽量化を図ることができる。
初めに、この第一の実施形態に係る回転電機のケースを図1から図7の図面を参照して説明する。
図1において符号1は、内転型モータ(回転電機)のケースである。符号50は前記モータのステータであって、ステータ50はケース1の内側に固定されている。つまり、ケース1はステータ50の外側に配置されている。
冷却通路2の厚み、すなわち内側壁部12と外側壁部13との間隔は、図3、図5に示すように、冷却水入口孔4と冷却水出口孔6の近傍において周方向のその他の位置よりも大きくなっている。冷却水入口孔4と冷却水出口孔6の近傍以外の部分では周方向においても軸方向においても同一寸法となっている。
図5、図6に示すように、これら貫通孔19A,19B,19Cの開口面積を比較すると、冷却水入口孔4に一番近い側に配置されたリブ14Aの貫通孔19Aの開口面積が一番大きい。中心軸方向の中間に配置されたリブ14Bの貫通孔19Bの開口面積は貫通孔19Aの開口面積より小さく、冷却水入口孔4から一番離れて配置されたリブ14Cの貫通孔19Cの開口面積は貫通孔19Bの開口面積よりも小さい。すなわち、冷却水入口孔4から遠ざかるにしたがって貫通孔19の開口面積が小さくなっている。この各貫通孔の開口面積比は自由に設定可能である。
例えば、軸方向に4分割された冷却通路2a,2b,2c,2dに均一(同一流量)に冷却水を流したい場合には、冷却水入口孔4の開口面積をSとしたときに、貫通孔19Aの開口面積を(3/4)Sとし、貫通孔19Bの開口面積を(1/2)Sとし、貫通孔19Cの開口面積を(1/4)Sとすればよい。
冷却水入口孔4から流入した冷却水は、冷却水入口孔4に一番近い第1冷却通路2aに流入する。第1冷却通路2aに流入した冷却水の一部が第1冷却通路2aの周方向に沿って左右二手に分かれ、冷却水出口孔6に向かって流れる。第1冷却通路2aの周方向に流れていかなかった冷却水は、リブ14Aの貫通孔19Aを通って第2冷却通路2bに流入する。第2冷却通路2bに流入した冷却水の一部が第2冷却通路2bの周方向に沿って左右二手に分かれ、冷却水出口孔6に向かって流れる。第2冷却通路2bの周方向に流れていかなかった冷却水は、リブ14Bの貫通孔19Bを通って第3冷却通路2cに流入する。第3冷却通路2cに流入した冷却水の一部が第3冷却通路2cの周方向に沿って左右二手に分かれ、冷却水出口孔6に向かって流れる。第3冷却通路2cの周方向に流れていかなかった冷却水は、リブ14Cの貫通孔19Cを通って第4冷却通路2dに流入し、第4冷却通路2dの周方向に沿って左右二手に分かれ、冷却水出口孔6に向かって流れる。
つまり、リブ14A,14B,14Cには冷却水入口孔4の中心軸延長線上に貫通孔19A,19B,19Cが設けられているので、冷却水入口孔4から流入した冷却水は、貫通孔19A,19B,19Cを通過することによって中心軸方向に分配できる。さらに、リブ14A,14B,14Cがケース1の周方向に沿ってほぼ全周に設けられているので、冷却水を周方向に分配できる。
また、冷却通路2の内部に、周方向に沿ってリブ14A,14B,14Cを設けるだけの構造であるので、冷却通路2の形状が簡素化し、鋳造時の中子型割も容易となり、中子の砂抜きも容易にでき、砂残り量が低減する。その結果、砂抜き工数を減らすことができるとともに、生産コストを低減できる。
また、リブ14の高さを低くすることにより、冷却水の流速を上げ、冷却能力を高めることが可能である。また、リブ14の高さを低くすることにより、ケース1の小型・軽量化を図ることができ、ひいてはモータの小型・軽量化を図ることができる。
また、リブ14には、冷却水入口孔4の中心軸延長線上に貫通孔19が設けられているので、冷却水入口孔4から流入した冷却水はこの貫通孔19を通過することによって、中心軸方向に分配され、さらに周方向に分配される。したがって冷却水をリブ14によって区画された流体通路2a,2b,2c,2dに分配できる。
また、前述したように、拡開室(中子支え孔7a,7b,7c)において冷却効果を大きくできる。
第二の実施形態に係る回転電機のケース1が第一の実施形態に係る回転電機のケースと異なる点は、リブ14A,14B,14Cに設けた貫通孔19A,19B,19Cの形態である。それ以外の構成については第一の実施形態に係る回転電機のケースと同じであるので説明を省略する。相違点だけを図8、図9を参照して説明する。
図8は、第一の実施形態に係る回転電機のケースにおける図6に対応する断面図である。図9は図8のC-C断面を模式的に示した図である。
リブ14Bにおいて貫通孔19Aよりも周方向に突き出ている突出部W2、および、リブ14Cにおいて貫通孔19Bよりも周方向に突き出ている突出部W3も同様の作用がある。すなわち、突出部W2,W3を有する側へ周方向に延びる冷却通路2b,2cへ流れる冷却水流量Q1は、周方向反対側へ延びる冷却通路2b,2cに流れる冷却水流量Q2よりも多くなる。
第二の実施形態に係る回転電機のケースにおいても、第一の実施形態に係る回転電機のケースと同様に、貫通孔19A,19B,19Cの内径を変えて開口面積比による流量調整を行うことも可能である。
この発明は前述した実施形態に限られるものではない。
例えば、リブ14の本数、リブ14間の離間寸法(すなわちリブ間隔)、軸方向および周方向の冷却流体の流量配分は、ケース1の温度分布に応じて適宜設定可能である。
回転電機はモータに限るものではなく、発電機(ジェネレータ)であってもよいし、モータジェネレータであってもよい。
冷却流体は冷却水に限るものではなく、冷却液あるいは冷却ガスであってもよい。
2 冷却通路
4 冷却水入口孔(冷却流体インレット)
6 冷却水出口孔(冷却流体アウトレット)
12 内側壁部(冷却通路の径方向内側の壁部)
13 外側壁部(冷却通路の径方向外側の壁部)
14,14A,14B,14C リブ
15 開口(第2の開口)
Claims (4)
- 内転型回転電機のステータの外周側に配置された筒状の回転電機のケースであって、
このケースの内部に前記ケースの周方向に沿って設けられて冷却流体が流通可能な冷却通路と;
前記冷却通路に連通する冷却流体インレットおよび冷却流体アウトレットと;
前記冷却通路の内部に設けられ、前記冷却通路の前記ケースの径方向の内側の壁部と前記径方向の外側の壁部とを前記周方向に沿って連結し、前記ケースの軸方向に互いに離間して配置されて前記冷却通路を複数に区画するリブと;
を備え、
前記冷却流体インレットは、その中心軸を前記ケースの前記軸方向と平行に配置して、前記リブによって区画された前記冷却通路のうちの前記軸方向の一方の端部側に配置された冷却通路に連通し、
前記リブは、前記冷却流体インレットの前記中心軸の延長線上で前記冷却通路における前記中心軸に沿った方向の一方側から前記中心軸に沿った方向の他方側に貫通する開口を有する
ことを特徴とする回転電機のケース。 - 前記リブを複数備え、これらリブのそれぞれに設けられた前記開口が、前記冷却流体インレットの前記中心軸の前記延長線を中心とする円形をなし、前記開口の開口面積が、前記中心軸に沿った方向の一方側に配置された前記リブの前記開口から前記中心軸に沿った方向の他方側に配置された前記リブの前記開口に進むにしたがって小さくなることを特徴とする請求項1に記載の回転電機のケース。
- 前記リブを複数備え、これらリブのそれぞれに設けられた前記開口の中心が、前記中心軸に沿った方向の一方側に配置された前記リブの前記開口から前記中心軸に沿った方向の他方側に配置された前記リブの前記開口に進むにしたがって徐々に前記周方向にずれていることを特徴とする請求項1に記載の回転電機のケース。
- 前記リブは、前記冷却流体インレットと前記冷却流体アウトレットとの間の前記周方向位置にて、前記冷却通路における前記軸方向一方側から前記軸方向他方側に貫通する第2の開口を有し、前記第2の開口の近傍に、前記冷却通路に連通する拡開室が設けられていることを特徴とする請求項1~3のいずれか一項に記載の回転電機のケース。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012533415A JP5113306B2 (ja) | 2011-02-18 | 2012-01-18 | 回転電機のケース |
| CN201280002567.1A CN103069693B (zh) | 2011-02-18 | 2012-01-18 | 旋转电机的壳体 |
| US13/813,078 US9331551B2 (en) | 2011-02-18 | 2012-01-18 | Case of electric rotating machine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-033526 | 2011-02-18 | ||
| JP2011033526 | 2011-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012111374A1 true WO2012111374A1 (ja) | 2012-08-23 |
Family
ID=46672315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/050942 Ceased WO2012111374A1 (ja) | 2011-02-18 | 2012-01-18 | 回転電機のケース |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9331551B2 (ja) |
| JP (2) | JP5113306B2 (ja) |
| CN (1) | CN103069693B (ja) |
| WO (1) | WO2012111374A1 (ja) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014087232A (ja) * | 2012-10-26 | 2014-05-12 | Toyota Industries Corp | 回転電機 |
| JP2014140288A (ja) * | 2012-12-20 | 2014-07-31 | Yaskawa Electric Corp | 回転電機および回転電機の筐体 |
| FR3072225A1 (fr) * | 2017-10-09 | 2019-04-12 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Machine electrique et procede de fabrication |
| JP6791463B1 (ja) * | 2020-03-30 | 2020-11-25 | 三菱電機株式会社 | モータ及びモータ装置 |
| JP2021125991A (ja) * | 2020-02-06 | 2021-08-30 | 株式会社明電舎 | 回転電機 |
| JP2022047637A (ja) * | 2020-09-14 | 2022-03-25 | 三菱電機株式会社 | 回転電機 |
| WO2023079719A1 (ja) * | 2021-11-08 | 2023-05-11 | 日立Astemo株式会社 | 回転電機 |
| CN116394743A (zh) * | 2023-05-18 | 2023-07-07 | 蔚来动力科技(合肥)有限公司 | 车辆的驱动装置及包括其的车辆 |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012008209A1 (de) * | 2012-04-21 | 2013-10-24 | Volkswagen Aktiengesellschaft | Elektrische Maschine |
| US9356492B2 (en) | 2013-05-30 | 2016-05-31 | Remy Technologies, Llc | Electric machine with liquid cooled housing |
| CN105264752B (zh) * | 2013-05-30 | 2018-01-26 | 瑞美技术有限责任公司 | 具有液体冷却壳体的电机 |
| DE112015002363A5 (de) * | 2014-05-20 | 2017-02-23 | Schaeffler Technologies AG & Co. KG | Bauraumoptimierter Kühlmantel für eine elektrische Maschine |
| CN104729332B (zh) * | 2015-03-03 | 2019-09-03 | 刘坚 | 一种用于冷却和加热的圆筒构件 |
| AT517533B1 (de) * | 2015-07-20 | 2017-06-15 | Avl List Gmbh | Elektrische Maschine |
| KR101700769B1 (ko) * | 2015-07-24 | 2017-01-31 | 엘지전자 주식회사 | 전동기 및 그의 제조방법 |
| JP2017093207A (ja) * | 2015-11-13 | 2017-05-25 | 株式会社エクセディ | 回転電機 |
| JP6293189B2 (ja) | 2016-03-31 | 2018-03-14 | 三菱電機株式会社 | 回転電機の固定子 |
| JP6312114B1 (ja) * | 2016-06-29 | 2018-04-18 | 三菱電機株式会社 | 車両用回転電機 |
| JPWO2018066076A1 (ja) * | 2016-10-04 | 2018-10-11 | 三菱電機株式会社 | 回転電機及び回転電機の固定子 |
| DE102016225521A1 (de) * | 2016-12-20 | 2018-06-21 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmantel-Gehäuse, insbesondere für eine elektrische Maschine |
| JP2020162187A (ja) * | 2017-07-28 | 2020-10-01 | 日本電産トーソク株式会社 | モータ |
| FR3072224B1 (fr) * | 2017-10-09 | 2019-10-04 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Machine electrique et procede de fabrication |
| KR102575713B1 (ko) * | 2017-12-04 | 2023-09-07 | 현대자동차주식회사 | 모터 냉각구조 |
| JP2019161798A (ja) * | 2018-03-09 | 2019-09-19 | 本田技研工業株式会社 | 回転電機の冷却構造体 |
| JP6982551B2 (ja) * | 2018-06-19 | 2021-12-17 | 日立Astemo株式会社 | 電動機の冷却装置 |
| KR102018231B1 (ko) * | 2018-07-11 | 2019-09-04 | 엘지전자 주식회사 | 전동기 |
| CN110957842B (zh) * | 2018-09-27 | 2023-10-20 | 株式会社电装 | 旋转电机 |
| JP7088033B2 (ja) * | 2019-01-08 | 2022-06-21 | 株式会社デンソー | 回転電機 |
| US20220069663A1 (en) * | 2019-01-10 | 2022-03-03 | Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. | Motor, and inverter-integrated rotating electric machine |
| EP3683938B1 (de) * | 2019-01-15 | 2021-09-01 | GF Casting Solutions AG | Gekühltes gehäuse |
| CN113424416A (zh) * | 2019-03-29 | 2021-09-21 | 日本电产株式会社 | 马达 |
| JP2021010266A (ja) * | 2019-07-02 | 2021-01-28 | 本田技研工業株式会社 | 回転電機ケース及び車両 |
| NL2023483B1 (en) * | 2019-07-11 | 2021-02-03 | Tecnotion Assets B V | Permanent Magnet Synchronous Torque Motor |
| DE102019123685A1 (de) * | 2019-09-04 | 2021-03-04 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmantel für eine elektrische Maschine sowie Verfahren zum Herstellen eines Kühlmantels |
| FR3105649B1 (fr) * | 2019-12-19 | 2021-11-26 | Valeo Equip Electr Moteur | Machine électrique tournante refroidie |
| BE1027955B1 (nl) | 2019-12-31 | 2021-08-04 | Punch Powertrain Nv | Roterende machine en werkwijze voor het koelen van een roterende machine |
| DE102020201127A1 (de) * | 2020-01-30 | 2021-08-05 | Robert Bosch Gesellschaft mit beschränkter Haftung | Elektrischer Antrieb eines elektrisch angetriebenen Fahrzeugs |
| WO2021166171A1 (ja) * | 2020-02-20 | 2021-08-26 | 日産自動車株式会社 | 回転電機及び回転電機の車載構造 |
| JP7402102B2 (ja) * | 2020-03-30 | 2023-12-20 | 住友重機械工業株式会社 | リニアモータの冷却ユニット、リニアモータ、リニアモータの冷却ユニットの製造方法 |
| EP4145676A4 (en) * | 2020-04-26 | 2024-01-10 | SAIC MOTOR Corporation Limited | COOLING SYSTEM FOR NEW ENERGY AUTOMOTIVE DRIVE MOTOR |
| JP7509048B2 (ja) * | 2021-02-02 | 2024-07-02 | トヨタ自動車株式会社 | 電動車両 |
| WO2022190183A1 (ja) * | 2021-03-08 | 2022-09-15 | 日産自動車株式会社 | 回転電機 |
| CN113623183B (zh) * | 2021-08-19 | 2023-05-05 | 势加透博(上海)能源科技有限公司 | 空压机外壳和空压机 |
| JP2025106711A (ja) * | 2024-01-04 | 2025-07-16 | トヨタ自動車株式会社 | モータユニット |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522901A (ja) * | 1991-07-05 | 1993-01-29 | Fanuc Ltd | 電動機の液冷手段とその製造方法 |
| JP2007143247A (ja) * | 2005-11-16 | 2007-06-07 | Ishikawajima Harima Heavy Ind Co Ltd | 水冷モータおよびそのモータフレームの水路加工方法 |
| JP2010041835A (ja) * | 2008-08-06 | 2010-02-18 | Mitsubishi Motors Corp | 回転電機 |
| JP2010206993A (ja) * | 2009-03-04 | 2010-09-16 | Daikin Ind Ltd | 電動機 |
| JP2010213402A (ja) * | 2009-03-09 | 2010-09-24 | Nissan Motor Co Ltd | モータのハウジング構造 |
| JP2010273424A (ja) * | 2009-05-20 | 2010-12-02 | Honda Motor Co Ltd | 電動機 |
| JP2011015578A (ja) * | 2009-07-03 | 2011-01-20 | Fanuc Ltd | 電動機冷却装置 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2862120A (en) * | 1957-07-02 | 1958-11-25 | Onsrud Machine Works Inc | Fluid-cooled motor housing |
| JPH08205474A (ja) | 1995-01-23 | 1996-08-09 | Nippondenso Co Ltd | 液冷式回転電機 |
| JPH08214502A (ja) | 1995-01-31 | 1996-08-20 | Fuji Electric Co Ltd | 永久磁石同期機の冷却装置 |
| DE10141693A1 (de) * | 2001-08-25 | 2003-03-06 | Bosch Gmbh Robert | Elektrische Maschine, insbesondere Generator für Kraftfahrzeuge |
| US6909210B1 (en) * | 2004-02-06 | 2005-06-21 | Emerson Electric Co. | Cooling system for dynamoelectric machine |
| CN1889334A (zh) | 2005-06-29 | 2007-01-03 | 中国科学院电工研究所 | 外水道式蒸发冷却卧式电机 |
| CN101087082B (zh) | 2007-05-25 | 2010-08-04 | 奇瑞汽车股份有限公司 | 一种混合动力汽车电机的冷却水套及制造方法 |
| CN201270453Y (zh) | 2008-08-27 | 2009-07-08 | 比亚迪股份有限公司 | 电机外壳冷却水路结构 |
| CN201355786Y (zh) * | 2008-12-30 | 2009-12-02 | 上海大郡自动化系统工程有限公司 | 用于电机的水冷装置 |
| JP5075874B2 (ja) | 2009-06-02 | 2012-11-21 | 本田技研工業株式会社 | 電動機 |
| CN101656445B (zh) | 2009-09-14 | 2012-05-23 | 精进电动科技(北京)有限公司 | 一种对电机进行冷却的系统和方法 |
-
2012
- 2012-01-18 JP JP2012533415A patent/JP5113306B2/ja not_active Expired - Fee Related
- 2012-01-18 CN CN201280002567.1A patent/CN103069693B/zh active Active
- 2012-01-18 WO PCT/JP2012/050942 patent/WO2012111374A1/ja not_active Ceased
- 2012-01-18 US US13/813,078 patent/US9331551B2/en active Active
- 2012-10-11 JP JP2012225921A patent/JP5518972B2/ja not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522901A (ja) * | 1991-07-05 | 1993-01-29 | Fanuc Ltd | 電動機の液冷手段とその製造方法 |
| JP2007143247A (ja) * | 2005-11-16 | 2007-06-07 | Ishikawajima Harima Heavy Ind Co Ltd | 水冷モータおよびそのモータフレームの水路加工方法 |
| JP2010041835A (ja) * | 2008-08-06 | 2010-02-18 | Mitsubishi Motors Corp | 回転電機 |
| JP2010206993A (ja) * | 2009-03-04 | 2010-09-16 | Daikin Ind Ltd | 電動機 |
| JP2010213402A (ja) * | 2009-03-09 | 2010-09-24 | Nissan Motor Co Ltd | モータのハウジング構造 |
| JP2010273424A (ja) * | 2009-05-20 | 2010-12-02 | Honda Motor Co Ltd | 電動機 |
| JP2011015578A (ja) * | 2009-07-03 | 2011-01-20 | Fanuc Ltd | 電動機冷却装置 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014087232A (ja) * | 2012-10-26 | 2014-05-12 | Toyota Industries Corp | 回転電機 |
| JP2014140288A (ja) * | 2012-12-20 | 2014-07-31 | Yaskawa Electric Corp | 回転電機および回転電機の筐体 |
| FR3072225A1 (fr) * | 2017-10-09 | 2019-04-12 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Machine electrique et procede de fabrication |
| JP2021125991A (ja) * | 2020-02-06 | 2021-08-30 | 株式会社明電舎 | 回転電機 |
| JP7380279B2 (ja) | 2020-02-06 | 2023-11-15 | 株式会社明電舎 | 回転電機 |
| JP6791463B1 (ja) * | 2020-03-30 | 2020-11-25 | 三菱電機株式会社 | モータ及びモータ装置 |
| WO2021199172A1 (ja) * | 2020-03-30 | 2021-10-07 | 三菱電機株式会社 | モータ及びモータ装置 |
| JP2022047637A (ja) * | 2020-09-14 | 2022-03-25 | 三菱電機株式会社 | 回転電機 |
| WO2023079719A1 (ja) * | 2021-11-08 | 2023-05-11 | 日立Astemo株式会社 | 回転電機 |
| CN116394743A (zh) * | 2023-05-18 | 2023-07-07 | 蔚来动力科技(合肥)有限公司 | 车辆的驱动装置及包括其的车辆 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103069693B (zh) | 2014-01-01 |
| JPWO2012111374A1 (ja) | 2014-07-03 |
| US9331551B2 (en) | 2016-05-03 |
| JP5518972B2 (ja) | 2014-06-11 |
| CN103069693A (zh) | 2013-04-24 |
| US20130328423A1 (en) | 2013-12-12 |
| JP2013009597A (ja) | 2013-01-10 |
| JP5113306B2 (ja) | 2013-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5113306B2 (ja) | 回転電機のケース | |
| US20130169077A1 (en) | Electric rotary machine | |
| US20120242178A1 (en) | Rotating electrical machine | |
| JP2019515642A (ja) | 電気機械用フランジ | |
| JP6164179B2 (ja) | 電動モータの冷却構造およびその製造方法 | |
| JP2012100521A (ja) | 回転電機のケース | |
| WO2024001416A1 (zh) | 定子结构、轴向磁通电机、动力总成及车辆 | |
| JP2013543369A (ja) | 電気機械 | |
| CN111697730A (zh) | 包括冷却管道的转子、转子成型方法以及电机冷却系统 | |
| JP2017093207A (ja) | 回転電機 | |
| US12549046B2 (en) | Cooling of an electric motor | |
| JP6452164B2 (ja) | 回転電機のステータ | |
| JP4897587B2 (ja) | 回転電機 | |
| CN111162633A (zh) | 电机转子及汽车 | |
| JP7015213B2 (ja) | 回転電機のロータ、その製造方法および回転電機 | |
| JP5955437B1 (ja) | 回転電機 | |
| JP2010246185A (ja) | ロータおよびモータ | |
| JP2020141543A (ja) | 回転電機のロータ | |
| US8648506B2 (en) | Rotor lamination cooling system and method | |
| JP2020141542A (ja) | 回転電機のロータ | |
| JP6130940B1 (ja) | モータ | |
| JP2014039379A (ja) | 回転電機用ハウジングの製造方法 | |
| JP6372139B2 (ja) | 回転電機 | |
| JP2020114151A (ja) | ロータ及びシャフトの製造方法 | |
| JP2015119595A (ja) | モータ冷却構造 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201280002567.1 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2012533415 Country of ref document: JP |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12747144 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 13813078 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 12747144 Country of ref document: EP Kind code of ref document: A1 |