Rotating electric machine
By introducing a refrigerant passage and sealing components into the rotating motor, the problem of poor cooling caused by the gap between the stator core and the support components was solved, achieving cost control and effective cooling of the coil ends.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2025-11-13
- Publication Date
- 2026-05-22
AI Technical Summary
In existing rotating electric motors, there is a gap between the outer circumferential surface of the stator core and the oil passage forming part of the support component, which prevents the oil from sufficiently cooling the coil ends, and adding sealing components will increase costs.
The system employs a combination of a refrigerant passage, a refrigerant guiding component, a first sealing component, and a second sealing component. The refrigerant passage guides the coolant to the coil end, while the sealing component prevents coolant leakage, thus reducing the number of components.
Effective cooling of the stator coil ends avoids increased costs, achieves good cooling effect, and reduces the number of parts in the rotating motor.
Smart Images
Figure CN122073398A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to a rotary electric motor, which includes a housing, an annular stator disposed within the housing, and a rotor rotatably disposed within the stator. Background Technology
[0002] Conventionally, a stator for a rotating electric machine is known, comprising a support member that supports the stator core radially outward (see, for example, Patent Document 1). This stator support member includes an annular oil passage forming portion and an annular outer peripheral support portion. The oil passage forming portion includes a first oil passage forming portion and a second oil passage forming portion separated axially, and a circumferential oil passage extending circumferentially between them, integrally joined to the outer peripheral surface of the stator core. The first and second oil passage forming portions have axial oil passages that extend linearly or are formed by multiple holes connected together. The outer peripheral support portion includes a recess forming an oil inlet passage, and a barrel portion that protrudes radially inward and extends axially to fill gaps formed in the first oil passage forming portion, etc. The outer peripheral support portion is integrally joined to the outer peripheral surface of the oil passage forming portion. Oil introduced into the inlet passage of the outer peripheral support portion flows circumferentially along the circumferential oil passage, and a portion of the oil flowing circumferentially is captured by the barrel portion and flows into the axial oil passage of the first oil passage forming portion, etc. Oil in the axial oil passage flows out from the opening of the axial oil passage and drips onto the coil ends of the stator coil. Thus, the coil ends can be cooled using oil.
[0003] Patent document 1: Japanese Patent Application Publication No. 2023-125010. Summary of the Invention The problem that the invention aims to solve
[0004] In the aforementioned existing stators, gaps sometimes form between the outer peripheral surface of the stator core and the oil passage forming portion of the support member, and between the outer peripheral surface of the oil passage forming portion and the outer peripheral support portion. Furthermore, if oil flows into these gaps, it may be impossible to adequately supply oil to the coil ends for proper cooling. Moreover, adding sealing members to seal the gaps between the stator core and the oil passage forming portion, and between the oil passage forming portion and the outer peripheral support portion, increases the cost of the rotating motor due to the increased number of components.
[0005] Therefore, the main objective of this disclosure is to suppress the increase in cost of rotating electric machines and to effectively cool the coil ends of the stator coils. Methods for solving problems
[0006] The rotary electric machine disclosed herein includes a housing, an annular stator disposed within the housing, a rotor rotatably disposed within the stator, a plurality of refrigerant passages, a refrigerant guiding member, a first sealing member, and a second sealing member. The plurality of refrigerant passages are circumferentially spaced on the stator core, extending from one end face of the stator core to the other. The plurality of refrigerant passages open at both one end face and the other end face of the stator core. The refrigerant guiding member includes a cylindrical portion surrounding one end of a stator coil wound around the stator core, and a plurality of refrigerant holes circumferentially spaced on the cylindrical portion. The refrigerant guiding member guides refrigerant from a refrigerant supply portion formed on the housing to the coil end side and the stator core side. The first sealing member seals between one end of the refrigerant guiding member opposite to the stator core side and the housing. The second sealing member includes a plurality of circumferentially spaced recesses, each recess communicating with an opening of a corresponding refrigerant passage at one end face of the stator core. Furthermore, the second sealing member seals between one end face of the stator core and the other end of the stator core side of the refrigerant guiding member, and also seals between one end face of the stator core and the housing.
[0007] In this rotary motor, a portion of the refrigerant from the refrigerant supply unit is guided to one end of the coil via multiple refrigerant holes in the refrigerant guide member. Furthermore, a portion of the refrigerant from the refrigerant supply unit is guided to the stator core by the refrigerant guide member and flows into each refrigerant passage through multiple openings in the second sealing member and an opening at one end face of the stator core. The refrigerant flowing into each refrigerant passage exits from an opening at the other end face of the stator core and is supplied to the other end of the stator coil. Additionally, one end of the refrigerant guide member is sealed to the housing by a first sealing member, and the stator core and the other end of the refrigerant guide member, as well as the stator core and the housing, are sealed by second sealing members. This effectively prevents refrigerant from the refrigerant supply unit from flowing into the space between one end of the refrigerant guide member and the housing, between the stator core and the other end of the refrigerant guide member, and between the stator core and the housing, thereby ensuring sufficient refrigerant supply to both ends of the stator coil. Furthermore, by sealing both the stator core and the other end of the refrigerant guiding member, as well as between the stator core and the housing, the increase in the number of components in the rotating electric motor can be suppressed. As a result, the cost of the rotating electric motor can be suppressed, and the coil ends of the stator coils can be effectively cooled. Attached Figure Description
[0008] Figure 1 This is a schematic structural diagram of the rotary electric machine disclosed herein. Figure 2This is a plan view showing the plate component forming the stator core of the rotating electric machine of the present disclosure. Figure 3 This is a plan view showing another plate component forming the stator core of the rotating electric machine of the present disclosure. Figure 4 This is a plan view showing another plate component forming the stator core of the rotating electric machine of the present disclosure. Figure 5 This is a perspective view showing the refrigerant guiding component of the rotating electric motor of the present disclosure. Figure 6 This is a cross-sectional view showing the main parts of the rotary electric machine of this disclosure. Detailed Implementation
[0009] Next, the method of implementing the invention disclosed herein will be described with reference to the accompanying drawings.
[0010] Figure 1 This is a schematic structural diagram showing the rotary motor 1 of this disclosure. The rotary motor 1 shown in the figure is, for example, a three-phase AC motor used as a driving source or generator for electric vehicles (BEVs), fuel cell vehicles (FCVs), or hybrid electric vehicles (PHEVs, HEVs). As shown, the rotary motor 1 includes a housing 2, an annular stator 3, and a rotor 4 rotatably disposed within the stator 3. The housing 2 includes a cylindrical housing body 20, and an open end of the housing body 20 blocked by a plurality of bolts (not shown). Figure 1 The cover 25 is fixed to the housing body 20 by means of the left end of the cover 25. The housing body 20 and the cover 25 are formed of metal such as aluminum alloy.
[0011] The stator 3 of the rotating electric machine 1 includes a stator core 30 and three-phase (3) stator coils CU, CV, and CW wound around the stator core 30. The stator core 30 is constructed by... Figure 2 , Figure 3 and Figure 4 The electromagnetic steel plates 31, 32, and 33 shown are formed by stacking multiple layers and connecting them in the stacking direction by riveting. However, the stator core 30 can also be formed into a ring shape by pressing and sintering strongly magnetic powder.
[0012] like Figure 2As shown, the electromagnetic steel plate 31 includes a central hole 310, a plurality of protrusions 311, a plurality of notches 312 (e.g., 48 in this embodiment), a plurality of bolt holes 314 (e.g., 3 in this embodiment), and a plurality of holes 315 (e.g., 48 in this embodiment). The plurality of protrusions 311 extend radially from the annular outer periphery of the electromagnetic steel plate 31 toward the central hole 310 (axis) and are adjacent to each other at predetermined circumferential intervals. The plurality of notches 312 extend radially between adjacent protrusions 311 and are arranged at predetermined circumferential intervals, opening at the central hole 310. The plurality of bolt holes 314 are formed circumferentially at intervals (e.g., equal intervals) on the outer periphery of the electromagnetic steel plate 31. The plurality of holes 315 are formed circumferentially at intervals (e.g., equal intervals) on the radially outer side of the base end of each protrusion 311, close to the outer periphery of the electromagnetic steel plate 31.
[0013] like Figure 3 As shown, the electromagnetic steel plate 32 includes a central hole 320, a plurality of protrusions 321, a plurality of notches 322 (e.g., 48 in this embodiment), a plurality of bolt holes 324 (e.g., 3 in this embodiment), and a plurality of slits 325 (e.g., 48 in this embodiment). The plurality of protrusions 321 extend radially from the annular outer periphery of the electromagnetic steel plate 32 toward the central hole 320 (axis) and are adjacent to each other at predetermined intervals in the circumferential direction. The plurality of notches 322 extend radially between adjacent protrusions 321 and are arranged at predetermined intervals in the circumferential direction, and open at the central hole 320. The plurality of bolt holes 324 are formed at circumferential intervals (e.g., equal intervals) on the outer periphery of the electromagnetic steel plate 32. The plurality of slits 325 extend from the base end of each protrusion 321 to the vicinity of the outer periphery of the electromagnetic steel plate 32 and are formed at circumferential intervals (equal intervals) in a manner communicating with the holes 315 of the electromagnetic steel plate 31.
[0014] like Figure 4 As shown, the electromagnetic steel plate 33 includes a central hole 330, a plurality of protrusions 331, a plurality of notches 332 (e.g., 48 in this embodiment), a plurality of bolt holes 334 (e.g., 3 in this embodiment), and a plurality of holes 335 (e.g., 48 in this embodiment). The plurality of protrusions 331 extend radially from the annular outer periphery of the electromagnetic steel plate 33 toward the central hole 330 (axis) and are adjacent to each other at predetermined circumferential intervals. The plurality of notches 332 extend radially between adjacent protrusions 331 and are arranged at predetermined circumferential intervals, opening at the central hole 330. The plurality of bolt holes 334 are formed circumferentially at intervals (e.g., equal intervals) on the outer periphery of the electromagnetic steel plate 33. The plurality of holes 335 are formed circumferentially at intervals (e.g., equal intervals) near the base end of each protrusion 331, communicating with the inner end of the slit 325 of the electromagnetic steel plate 32.
[0015] In this embodiment, a relatively small number of electromagnetic steel plates 31 are stacked to form the lead-side end of the stator core 30. Furthermore, a larger number of electromagnetic steel plates 33 are stacked to form most of the stator core 30 and the lead-side end. Moreover, a plurality of electromagnetic steel plates 32 are stacked between the plurality of electromagnetic steel plates 31 and 33. Furthermore, when the plurality of electromagnetic steel plates 31, 32, and 33 are connected, a plurality of protrusions 311, 321, and 331 overlap to form a plurality of teeth in the stator core 30, and a plurality of notches 312, 322, and 332 overlap to form a plurality of slots in the stator core 30.
[0016] Furthermore, on the stator core 30, multiple bolt holes extending axially are formed by interconnecting the bolt holes 314, 324, and 334 of the electromagnet plates 31, 32, and 33. Moreover, on the stator core 30, multiple (for example, 48 in this embodiment) refrigerant passages 35 are formed circumferentially at intervals through the holes 315 of the electromagnet plate 31, the slits 325 of the electromagnet plate 32, and the holes 335 of the electromagnet plate 33. Each refrigerant passage 35 originates from one end face of the stator core 30 on the lead wire side (… Figure 1 The right end face of the middle) 30a extends to the other end face on the reverse lead side ( Figure 1 The left end face 30b is open at one end face 30a and the other end face 30b.
[0017] The stator coils CU, CV, and CW of the stator 3 are formed by electrically joining multiple segmented coils (coil wires) (not shown), for example, by connecting them to each other in a star connection (Y connection). Each segmented coil is an electrical conductor formed by bending a flat wire with an insulating coating of enamel resin or the like into a roughly U-shape, and has a pair (2) legs. The two legs of each segmented coil are inserted into different slots in the stator core 30, and the legs of each segmented coil protruding from one end face 30a of the stator core 30 are bent.
[0018] After bending, the front ends of each segmented coil are electrically joined to the front ends of the corresponding segmented coils adjacent to it in the radial direction of the stator core 30 by welding. Thus, multiple stator coils CU, CV, and CW are wound around the stator core 30. Furthermore, the annular coil ends Ea of the stator coils CU, CV, and CW protrude from one end face 30a of the stator core 30, and the annular coil ends Eb of the stator coils CU, CV, and CW protrude from the other end face 30b of the stator core 30.
[0019] The rotor 4 of the rotating electric motor 1 is a so-called built-in magnet type (IPM type) rotor. For example... Figure 1As shown, the rotor 4 includes a rotor shaft 40, a rotor core 41 fixed to the rotor shaft 40, and a plurality of permanent magnets (not shown) embedded in the rotor core 41 to form multiple (e.g., 8 poles in this embodiment) magnetic poles. The rotor 4 is disposed within the housing 2 so that the rotor core 41 can rotate freely within the stator 3 through an air gap. In addition, the rotor shaft 40 is supported for rotation by a plurality of bearings (not shown) held by the housing 2.
[0020] Moreover, such as Figure 1 As shown, the rotary motor 1 includes a refrigerant guiding member 50. The refrigerant guiding member 50 is formed of a material such as resin, for example... Figure 5 As shown, it includes an annular cylindrical portion 51, an annular side plate portion 52, and an annular flange portion 53. The cylindrical portion 51 has an inner diameter larger than the outer diameter of one of the stator coils CU, CV, and CW coil ends Ea, an outer diameter smaller than the outer diameter of the stator core 30, and an axial length longer than the length (axial length) by which the coil end Ea protrudes from one end face 30a of the stator core 30. Furthermore, a plurality of refrigerant holes (through holes) 51o are formed circumferentially spaced on the cylindrical portion 51.
[0021] The side plate portion 52 of the refrigerant guiding member 50 extends from one end of the cylindrical portion 51. Figure 5 The right end of the cylindrical portion 51 extends radially inward and radially outward. In this embodiment, the side plate portion 52 has an inner diameter slightly larger than the inner diameter of the stator core 30 and an outer diameter slightly larger than the outer diameter of the cylindrical portion 51. Furthermore, a plurality of refrigerant discharge holes 52o are formed at the lower part of the side plate portion 52. The flange portion 53 extends from the other end of the cylindrical portion 51 (… Figure 5 The flange portion 53 extends radially outward from the left end of the flange portion 52. In this embodiment, the flange portion 53 has an outer diameter that is slightly smaller than the outer diameter of the side plate portion 52.
[0022] like Figure 5 As shown, an annular first gasket (first sealing member) 61 is installed on the outer periphery of the side plate portion 52 of the refrigerant guiding member 50. In this embodiment, the first gasket 61 is formed of, for example, an acrylic rubber material and has an outer diameter that is approximately the same as the outer diameter of the side plate portion 52. The first gasket 61 includes a plurality of holes into which corresponding protrusions formed in the side plate portion 52 are pressed, and the first gasket 61 is installed on the outer periphery of the side plate portion 52 in such a way that it protrudes toward the side of the side plate portion 52 opposite to the side of the cylindrical portion 51.
[0023] Additionally, an annular second washer (second sealing member) 62 is installed on the flange portion 53 of the refrigerant guiding member 50. In this embodiment, the second washer 62 is formed, for example, of an acrylic rubber material, and has an inner diameter approximately the same as the inner diameter of the cylindrical portion 51 and an outer diameter approximately the same as the outer diameter of the stator core 30. The second washer 62 includes a plurality of holes into which corresponding protrusions formed on the flange portion 53 are pressed, and the second washer 62 is installed on the surface of the flange portion 53 opposite to the side plate portion 52 in a radially outward manner. Moreover, on the second washer 62, a plurality of cavities 62o are formed circumferentially spaced at intervals equal to the arrangement spacing of the holes 315 of the electromagnet plate 31, located radially outward of the flange portion 53. Each cavity 62o is formed to have an opening area larger than the holes 315 of the electromagnet plate 31 when the second washer 62 is compressed to a predetermined amount during installation.
[0024] like Figure 6 As shown, a refrigerant guiding member 50 (assembly) equipped with a first washer 61 and a second washer 62 is fitted into a fitted portion (fitting portion) 21 formed on the housing body 20 of the housing 2. The fitted portion 21 is a cylindrical portion having an inner diameter slightly larger than the outer diameter of the side plate portion 52 of the refrigerant guiding member 50 and the first washer 61. The first washer 61 and the side plate portion 52 of the refrigerant guiding member 50 are fitted into the fitted portion 21, and the first washer 61 and the side plate portion 52 of the refrigerant guiding member 50 are fitted into the fitted portion 21. Figure 6 The annular inner facing portion 22 extending radially inward from the right end of the middle abuts against the housing body 20. Furthermore, the outer periphery of the second washer 62 (the radially outer portion of the plurality of cavity portions 62o) abuts against the outer facing portion 23 of the housing body 20, which is radially outer than the aforementioned inner facing portion 22 and closer to the cover 25 side. Figure 6 Extends radially from the left side of the middle.
[0025] Furthermore, an annular space S surrounding the cylindrical portion 51 is defined between the refrigerant guiding member 50 and the housing body 20 in the radial direction. For example... Figure 6 As shown, space S is connected to at least one refrigerant supply hole (refrigerant supply section) 20o formed on the housing body 20, and a lubricating oil (lubricating cooling medium) for lubricating and cooling the rotary motor 1 is supplied to the refrigerant supply hole 20o by an oil pump (not shown). In addition, anti-rotation structures for limiting the rotation of the refrigerant guiding member 50 relative to the housing 2 are provided on the housing body 20 and the refrigerant guiding member 50.
[0026] In addition, such as Figure 6As shown, the stator 3 is assembled inside the housing body 20 such that one coil end Ea is radially spaced and surrounded by the cylindrical portion 51 of the refrigerant guiding member 50, and the outer periphery of one end face 30a of the stator core 30 abuts against the second washer 62. Furthermore, the stator 3 (stator core 30) is fastened to the housing body 20 (housing 2) via bolts (not shown) inserted into a plurality of bolt holes.
[0027] As a result, the first washer 61 is compressed (flattened) as the stator 3 is tightened relative to the housing body 20, thereby sealing the space between the side plate portion 52 at the end of the refrigerant guiding member 50 opposite to the stator core 30 side and the inner facing portion 22 (housing 2) of the housing body 20. Similarly, the second washer 62 is also compressed (flattened) as the stator 3 is tightened relative to the housing body 20. As a result, the second washer 62 seals the space between one end face 30a of the stator core 30 and the flange portion 53 at the other end of the stator core 30 side of the refrigerant guiding member 50, and seals the space between one end face 30a of the stator core 30 and the outer facing portion 23 of the housing body 20.
[0028] like Figure 6 As shown, each cavity 62o of the second washer 62 communicates with the space S and the corresponding refrigerant passage 35 that opens at one end face 30a of the stator core 30. In this embodiment, the opening 36 of each refrigerant passage 35 at one end face 30a of the stator core 30 is defined by holes 315 of a plurality of electromagnet plates 31. Each opening 36 is located inside the corresponding cavity 62o of the second washer 62 and communicates with the space S via the cavity 62o. Furthermore, each refrigerant passage 35 includes a radial passage 37 defined by slits 325 of a plurality of electromagnet plates 32 and an axial passage 38 defined by holes 335 of a plurality of electromagnet plates 33.
[0029] Each refrigerant passage 35 has a radial passage 37 that communicates with a corresponding opening 36, and extends radially inward from the opening 36 to communicate with a corresponding axial passage 38. That is, the opening 36 of each refrigerant passage 35 is connected to the axial passage 38 via the radial passage 37. Moreover, the axial passage 38 of each refrigerant passage 35 extends axially from the inner end (one end face 30a side) of the radial passage 37 toward the other end face 30b of the stator core 30, and opens near the outer periphery of the coil end Eb of the stator coils CU, CV, and CW on the other end face 30b of the stator core 30. Thus, the opening 36 of the plurality of refrigerant passages 35 on one end face 30a of the stator core 30 will be radially outward of the stator 3 than the opening 39 of the plurality of refrigerant passages 35 (axial passages 38) on the other end face 30b of the stator core 30.
[0030] During operation of the rotary motor 1 configured as described above, lubricating and cooling oil is supplied to the refrigerant supply port 20o of the housing body 20. This lubricating and cooling oil flows into the space S from the upper refrigerant supply port 20o. A portion of the lubricating and cooling oil flowing into the space S is as follows: Figure 6 As shown by the dashed line, the refrigerant flows down along the cylindrical portion 51 of the refrigerant guide member 50 and is supplied to the coil end Ea of one of the stator coils CU, CV, and CW through a plurality of refrigerant holes 51o in the cylindrical portion 51. Additionally, a portion of the lubricating cooling oil flowing into the space S... Figure 6 As shown by the dashed line, the refrigerant is guided towards the stator core 30 side by the cylindrical portion 51 of the refrigerant guiding member 50, and flows into each refrigerant passage 35 through the multiple cavities 62o of the second washer 62 and the opening 36 at one end face 30a of the stator core 30.
[0031] The lubricating cooling oil flowing into each refrigerant passage 35 flows through the radial passage 37 and the axial passage 38, and flows out from the opening 39 at the other end face 30b of the stator core 30, supplying the coil end Eb of the stator coils CU, CV, and CW on the other side. Moreover, the side plate portion 52 (one end) of the refrigerant guiding member 50 opposite to the stator core 30 side and the inner facing portion 22 of the housing body 20 are sealed by a first gasket 61; the one end face 30a of the stator core 30 and the flange portion 53 (the other end) of the refrigerant guiding member 50 on the stator core 30 side, as well as the one end face 30a of the stator core 30 and the outer facing portion 23 of the housing body 20, are sealed by a second gasket 62.
[0032] Therefore, the flow of lubricating and cooling oil from the refrigerant supply hole 20o into the gaps between the side plate portion 52 of the refrigerant guide member 50 and the inner facing portion 22 of the housing body 20, the gap between the stator core 30 and the flange portion 53 of the refrigerant guide member 50, and the gap between the stator core 30 and the outer facing portion 23 of the housing body 20 can be effectively suppressed, thereby ensuring sufficient supply of lubricating and cooling oil to the coil ends Ea and Eb of both stator coils CU, CV, and CW. Furthermore, by sealing the space between the stator core 30 and the flange portion 53 of the refrigerant guide member 50, and between the stator core 30 and the outer facing portion 23 of the housing body 20, the increase in the number of components of the rotating electric machine 1 can be suppressed. As a result, the cost increase of the rotating electric machine 1 can be suppressed, and the coil ends Ea and Eb of the stator coils CU, CV, and CW can be effectively cooled. It should be noted that the lubricating oil used to cool the end Ea of one of the stator coils CU, CV, and CW is recycled through the refrigerant discharge hole 52o of the refrigerant guide member 50 and reused for lubrication and cooling of the rotary motor 1. Furthermore, the lubricating oil used to cool the end Eb of the other stator coil CU, CV, and CW is also recycled through an oil passage (not shown) and reused for lubrication and cooling of the rotary motor 1.
[0033] Furthermore, in the aforementioned installation state, each of the plurality of cavities 62o of the second washer 62 has an opening area larger than that of the openings 36 of the plurality of refrigerant passages 35 at one end face 30a of the stator core 30. This prevents the openings 36 from being blocked by the second washer 62, thereby ensuring that the amount of lubricating and cooling oil supplied from the refrigerant supply hole 20o through the plurality of refrigerant passages 35 to the coil end Eb of the stator coils CU, CV, CW is sufficient.
[0034] Furthermore, the first washer 61 is installed on the outer periphery of the side plate portion 52 (one end) of the refrigerant guiding member 50, and the second washer 62 is installed on the flange portion 53 (the other end) of the refrigerant guiding member 50. This further improves the ease of assembly of the first washer 61 and the second washer 62 relative to the stator 3 and the housing body 20 (housing 2). However, the first washer 61 and the second washer 62 do not necessarily need to be installed on the refrigerant guiding member 50; they can also be assembled separately relative to the stator 3 and the housing body 20 (housing 2).
[0035] Furthermore, the housing body 20 includes an inner facing portion 22 and an outer facing portion 23. The inner facing portion 22 is located on the side of the refrigerant supply hole 20o opposite to the stator core 30 side and is radially closer to the stator 3 than the outer facing portion 23, and is spaced apart axially from the side plate portion 52 (one end) of the refrigerant guiding member 50. The outer facing portion 23 is located on the stator core 30 side of the refrigerant supply hole 20o and is spaced apart axially from one end face 30a of the stator core 30. Moreover, the first gasket 61 seals between the side plate portion 52 (one end) of the refrigerant guiding member 50 and the inner facing portion 22. Furthermore, the second washer 62 seals between one end face 30a of the stator core 30 and the flange portion 53 of the refrigerant guiding member 50, and also seals between one end face 30a of the stator core 30 and the outer facing portion 23. Thus, by adjusting the thickness of the first washer 61, fluctuations in the spacing between one end face 30a of the stator core 30 and the outer facing portion 23, as well as fluctuations in the spacing between one end face 30a of the stator core 30 and the flange portion 53 of the refrigerant guiding member 50, can be absorbed.
[0036] Furthermore, each of the plurality of refrigerant passages 35 includes a radial passage 37 and an axial passage 38. Each radial passage 37 connects the opening 36 of the refrigerant passage 35 at one end face 30a of the stator core 30 with the axial passage 38. The axial passage 38 opens at the other end face 30b of the stator core 30 and extends axially toward the radial passage 37 (one end face 30a) along the stator 3. Moreover, the opening 36 of the plurality of refrigerant passages 35 at one end face 30a of the stator core 30 is radially outer of the stator 3 than the opening 39 of the plurality of refrigerant passages 35 at the other end face 30b of the stator core 30. Therefore, lubricating and cooling oil from the refrigerant supply hole 20o can be distributed to the coil end Ea side and the stator core 30 side of one of the stator coils CU, CV, and CW through the cylindrical portion 51 of the refrigerant guide member 50 located radially outside the coil end Ea of one of the stator coils CU, CV, and CW, and lubricating and cooling oil can be supplied to the coil end Eb of the other of the stator coils CU, CV, and CW through each refrigerant passage 35.
[0037] As described above, the rotary motor 1 of this disclosure includes a housing body 20 that, together with a cover 25, forms a housing 2; an annular stator 3 disposed within the housing body 20; a rotor 4 rotatably disposed within the stator 3; a plurality of refrigerant passages 35; a refrigerant guiding member 50; a first washer 61; and a second washer 62. The plurality of refrigerant passages 35 are circumferentially spaced on the stator core 30, extending from one end face 30a to the other end face 30b of the stator core 30. The plurality of refrigerant passages 35 open at one end face 30a and the other end face 30b of the stator core 30, respectively. The refrigerant guiding member 50 includes a cylindrical portion 51 surrounding one end Ea of the stator coils CU, CV, CW wound around the stator core 30; and a plurality of refrigerant holes 51o formed circumferentially spaced on the cylindrical portion 51. The refrigerant guiding member 50 guides lubricating cooling oil (refrigerant) from the refrigerant supply hole 20o formed on the housing body 20 to one of the coil end Ea sides and the stator core 30 side. A first washer 61 seals the side plate portion 52 of the refrigerant guiding member 50 (the end opposite to the stator core 30) between it and the housing body 20. A second washer 62 includes a plurality of circumferentially spaced cavities 62o, each cavity 62o communicating with an opening 36 in the corresponding refrigerant passage 35 at one end face 30a of the stator core 30. Furthermore, the second washer 62 seals the end face 30a of the stator core 30 between it and the flange portion 53 of the refrigerant guiding member 50 (the end on the stator core 30 side), and also seals the end face 30a of the stator core 30 between it and the housing body 20. As a result, the cost increase of the rotating motor 1 can be suppressed and the coil ends Ea and Eb of the stator coils CU, CV, and CW can be cooled well.
[0038] The invention disclosed herein is not limited to the embodiments described above, and various modifications can be made within the scope of this disclosure. Moreover, the above embodiments are merely one specific way of the invention described in the invention summary section, and are not intended to limit the elements of the invention described in the invention summary section. Industrial applicability
[0039] The invention disclosed herein can be applied to industries such as the manufacturing of rotating electric machines.
Claims
1. A rotary electric motor, comprising: case; An annular stator includes a stator core and stator coils wound around the stator core, and is disposed within the housing; as well as The rotor is rotatably configured within the stator. The rotary motor includes: Multiple refrigerant passages are formed circumferentially spaced on the stator core, extending from one end face to the other, and open at the one end face and the other end face of the stator core, respectively. The refrigerant guiding member includes a cylindrical portion surrounding one end of the stator coil and a plurality of refrigerant holes formed circumferentially spaced on the cylindrical portion, guiding refrigerant from a refrigerant supply portion formed on the housing toward the coil end side and the stator core side. The first sealing member seals between one end of the refrigerant guiding member on the side opposite to the stator core and the housing; as well as The second sealing member includes a plurality of circumferentially spaced cavities that communicate with openings at one end face of the corresponding refrigerant passages in the stator core, sealing between the one end face of the stator core and the other end of the refrigerant guiding member on the stator core side, and sealing between the one end face of the stator core and the housing.
2. The rotary motor according to claim 1, wherein, Each of the plurality of cavities of the second sealing member has an opening area larger than that of the openings of the plurality of refrigerant passages at one end face of the stator core.
3. The rotary motor according to claim 1 or 2, wherein, The first sealing member is installed at one end of the refrigerant guiding member, and the second sealing member is installed at the other end of the refrigerant guiding member.
4. The rotary motor according to claim 1 or 2, wherein, The housing includes: The outer facing portion, on the stator core side of the refrigerant supply section, faces the stator core at a distance spaced apart axially in the stator from one end face of the stator core; and The inner facing portion, on the side of the refrigerant supply portion opposite to the stator core side and on the radially inner side of the stator than the outer facing portion, faces the refrigerant guiding member at an axial distance. The first sealing member seals between one end of the refrigerant guiding member and the inner opposing portion. The second sealing member seals between one end face of the stator core and the outer facing portion.
5. The rotary motor according to claim 1 or 2, wherein, Each of the plurality of refrigerant passages includes: An axial passage opens at the other end face of the stator core and extends axially toward the first end face along the stator; and A radial passage connects the axial passage to the opening of the refrigerant passage at one end face of the stator core. The opening of the plurality of refrigerant passages at one end face of the stator core is further outward in the radial direction of the stator than the opening of the plurality of refrigerant passages at the other end face of the stator core.