EP4032172A1 - Machine électrique refroidie à l'huile - Google Patents
Machine électrique refroidie à l'huileInfo
- Publication number
- EP4032172A1 EP4032172A1 EP20754212.7A EP20754212A EP4032172A1 EP 4032172 A1 EP4032172 A1 EP 4032172A1 EP 20754212 A EP20754212 A EP 20754212A EP 4032172 A1 EP4032172 A1 EP 4032172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- electric machine
- oil
- bearing housing
- ring
- 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.)
- Pending
Links
- 239000000110 cooling liquid Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000005587 bubbling Effects 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 41
- 238000004804 winding Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BIIBYWQGRFWQKM-JVVROLKMSA-N (2S)-N-[4-(cyclopropylamino)-3,4-dioxo-1-[(3S)-2-oxopyrrolidin-3-yl]butan-2-yl]-2-[[(E)-3-(2,4-dichlorophenyl)prop-2-enoyl]amino]-4,4-dimethylpentanamide Chemical compound CC(C)(C)C[C@@H](C(NC(C[C@H](CCN1)C1=O)C(C(NC1CC1)=O)=O)=O)NC(/C=C/C(C=CC(Cl)=C1)=C1Cl)=O BIIBYWQGRFWQKM-JVVROLKMSA-N 0.000 description 1
- 241000782128 Albizia adianthifolia Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
- F16C33/6666—Details of supply of the liquid to the bearing, e.g. passages or nozzles from an oil bath in the bearing housing, e.g. by an oil ring or centrifugal disc
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/067—Fixing them in a housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
Definitions
- the present invention relates generally to the field of electrical engineering and more specifically relates to an electrical machine cooled by a dielectric coolant such as oil.
- oil circulation channels and injectors are positioned in the crankcase of the machine, in order to spray oil on the bearings and on the active parts of the machine.
- This type of cooling system requires a pump, a strainer, injectors and a circulation circuit which significantly increase the cost of the electrical machine.
- One of the aims of the invention is to remedy at least part of the drawbacks of the prior art by providing an electric machine cooled by a dielectric liquid, which is inexpensive while ensuring good cooling of the active parts of the machine and a good lubrication of bearings and dynamic seals of the machine.
- an electric machine comprising:
- a rotor comprising a rotating shaft, a lower part of said rotor bathed in a dielectric cooling liquid
- the casing comprising at least one bearing housing substantially cylindrical receiving by means of a bearing one end of said rotating shaft, said bearing being held in position in said bearing housing by, on the one hand, a retaining ring integral with an outer ring of said bearing, said retaining ring being abutment against an axial end surface of said bearing housing, and on the other hand a circular shoulder of said rotating shaft against which is brought into abutment an internal ring of said bearing, characterized in that an upper angular portion of a substantially cylindrical portion of said bearing housing comprises a receptacle capable of collecting dielectric cooling liquid sprayed into the housing by bubbling said rotor, and in that said upper angular portion comprises at least one channel passing radially through said substantially cylindrical portion, said channel opening axially between the outer ring of said bearing and an internal annular peripheral sidewalk erne said bearing housing.
- the working parts of the machine are cooled by the oil sprayed by the rotor when the rotor rotates, and the bearings of the machine are also lubricated by the oil sprayed by the rotor during operation.
- the machine according to the invention is therefore less expensive, more compact and easier to manufacture than in the prior art.
- said channel opens into a space of at least 2 mm (millimeters) formed between said internal annular peripheral sidewalk of said bearing housing and said bearing, and in which a dynamic seal is arranged around said rotating shaft in the space delimited by said internal annular peripheral sidewalk.
- This space allows good oil circulation all around the bearing and dynamic seal.
- said retaining ring comprises a recess, said recess being located radially between the outer ring of said bearing and an internal cylindrical surface of said bearing housing.
- said recess is located angularly closer to a horizontal plane including the axis of said rotating shaft, than to a vertical axis intersecting the axis of said rotating shaft. This makes it possible to keep a reserve of lubricating oil at the level of the bearing, when the electrical machine is restarted.
- said receptacle and said bearing housing of said housing are made in a single piece obtained by molding. This variant allows easy assembly of the electric machine.
- said receptacle is formed from a separate part interposed axially between an internal wall of said housing and said retaining ring, said part comprising a weir forming said channel and molded in a lower part of said part, said lower part of said part being inserted into a corresponding recess formed in said substantially cylindrical portion of said bearing housing.
- said receptacle is formed of a separate part interposed axially between an internal wall of said casing and said retaining ring, said part having the shape of a deformed crown section, the outer periphery of said crown being offset axially with respect to the inner periphery of said ring, said inner periphery of said ring being attached to said outer periphery of said ring by a corresponding annular section, said outer periphery of said ring resting against said retaining ring, said annular section conforming to the surface of said upper angular portion of said substantially cylindrical portion of said bearing housing, a weir forming said channel being molded in said annular section and in said inner periphery of said ring, said inner periphery of said ring being inserted into a corresponding recess formed in said substantially cylindrical portion of said bearing housing, said part further comprising retaining members in the form of walls extending radially and axially at the longitudinal ends of said annular section.
- said receptacle is made of plastic. It is thus easy to produce by molding and inexpensive.
- the invention also relates to an electric or hybrid vehicle comprising an electric traction machine according to the invention, in which said casing of said electric machine comprises an exchanger in its lower part incorporating a network of coolant channels connected to a cooling circuit. cooling connecting other equipment of said vehicle including the radiator located at the front of said vehicle, said cooling liquid being glycol water.
- This exchanger allows the cooling of the dielectric cooling liquid located in the casing of the machine, in particular when the temperature of said dielectric cooling liquid is above a high temperature threshold.
- said dielectric cooling liquid is oil
- said electrical machine is oil-tight and comprises an oil reservoir in a lower part of said casing provided with a heating element, said vehicle comprising means for activating said heating resistor when the temperature of the oil in said reservoir is below a low temperature threshold, during a starting phase of said vehicle.
- This heating of the oil at start-up allows the machine to operate correctly in very cold conditions, the oil at low temperature not allowing the bearings and dynamic seals of the machine to be lubricated correctly, and inducing significant viscous friction on the rotor.
- said electric machine is dimensioned for a nominal speed not exceeding 9000 revolutions per minute and does not include an internal oil projection circuit. This dimensioning makes it possible to keep a good performance for the electric machine, the friction of the oil on the rotor inducing significant losses at very high speed.
- the electric or hybrid vehicle according to the invention has advantages similar to those of the electric machine according to the invention.
- FIG. 1 shows in longitudinal section an electric machine cooled by a dielectric liquid according to the invention, in this preferred embodiment
- FIG. 2 shows an enlargement of Figure 1 at a bearing of the electric machine according to the invention, in this preferred embodiment
- FIG. 3 shows a part of the machine according to the invention forming a receptacle, in this preferred embodiment
- FIG. 4 shows a rotating shaft of the machine according to the invention, with the position of said part relative to other elements attached to the shaft, in this preferred embodiment.
- an electrical machine ME comprises a sealed CAR casing in which is fixed a stator STAT, a substantially hollow cylindrical assembly, formed of sheets comprising windings of wires. of copper.
- the STAT stator is fixed by screws or by shrinking to the substantially cylindrical internal wall of the CAR casing.
- substantially in this application, is meant “with a few variations”, for example with bumps or holes added relative to to a shape so defined, or with a difference within a range of 10% from a direction or position so defined.
- the STAT stator In the STAT stator is housed a ROT rotor, an assembly of sheets and windings or magnets surrounding an AT rotating shaft.
- the ends of the AT rotating shaft are held in bearings including ball bearings mounted on the AT rotating shaft and housed in substantially cylindrical LP bearing housings formed in the substantially planar walls of the CAR housing.
- the ball bearings are housed in a cylindrical internal part of the bearing housings.
- the RB ball bearing housed in the cylindrical inner part of the LP bearing housing has an outer ring BER and an internal BIR ring.
- the outer ring BER is secured to a retaining ring BR at the level of the axial end of the outer ring of the bearing RB facing the rotor ROT.
- the axial direction refers to the rotating axis AX of the rotor ROT, the radial and ortho-radial direction are also defined with respect to this axis AX.
- the CAR casing is for example designed in two parts, a bottom wall in which the ROT rotor is inserted, and a cover closing the CAR casing, the wall of which is visible in FIG. 2.
- an axial end surface SEA of the LP bearing housing located on the side of the ROT rotor, presses against the retaining ring BR in the direction of the ROT rotor, participating in the stressing of the RB ball bearing.
- the axial end surface SEA extends on a plane orthogonal to the axis AX of the rotor ROT.
- the RB ball bearing is held in position by a circular shoulder EP on the AT rotating shaft, which exerts a force in the opposite direction of the ROT rotor on the BIR inner ring of the RB ball bearing.
- the lower part of the ROT rotor is bathed in a dielectric coolant, which is in this preferred embodiment of the invention, OIL oil.
- OIL oil a dielectric coolant
- the terms lower and upper, or top and bottom in this application refer to a vertical axis V along which the electric machine ME is positioned. This axis is directed in the opposite direction to the direction of the force of gravity.
- the NO level of the OIL oil in the lower part of the ME electric machine is located at the lower winding of the ROT rotor.
- the rotational movement of the ROT rotor brings OIL oil over the entire cylindrical surface of the ROT rotor, which cools the rotor windings.
- OIL oil is further sprayed by the ROT rotor onto the cylindrical inner surface of the STAT stator, thereby cooling the stator windings.
- the sprayed oil which reaches the rotating shaft AT of the ROT rotor only lubricates the ball bearings very lightly. Another portion of the sprayed oil, as it falls, becomes trapped in a REC receptacle disposed on an upper surface of the LP bearing housing.
- a channel passing through this upper part of the LP bearing housing brings the oil thus trapped in the space between the RB ball bearing and a dynamic seal JD extending the wall of the CAR casing to seal the electrical machine ME at the outlet. of the AT rotating shaft.
- the oil effectively lubricates the RB ball bearing as well as the JD dynamic seal.
- the REC receptacle is open in the upper part, its lower part conforming to an upper angular portion of the substantially cylindrical part of the LP bearing housing except at the level of the channel formed by a recess EV in the LP bearing housing and which opens out between the BER outer ring of the RB ball bearing, and an inner annular peripheral TRO curb of the LP bearing housing.
- This ESP space between the sidewalk TRO and the BER outer ring of the RB ball bearing extends axially for at least 2mm, with the RB ball bearing not fully seated in the LP bearing housing.
- This ESP space preferably extends axially over 4 to 6 mm.
- the internal annular peripheral sidewalk TRO of the LP bearing housing defines, in the wall of the CAR casing, a space in which the dynamic seal JD is housed hermetically closing the axial end of the electric machine ME at the level of the ball bearing RB.
- the REC receptacle is a part shown in Figure 3 and assembled on the LP bearing housing, for example clipped or screwed thereto.
- This part for example made of molded plastic, has the shape of an angular section of a flat crown having been axially deformed.
- the outer periphery PE of this crown section is offset axially with respect to the internal periphery PI of this crown section.
- the walls of these external PE and internal PI peripheries of the REC receptacle are connected by an annular surface SA matching the upper surface of the bearing housing LP on which it is placed.
- the wall of the outer periphery PE is pressed against the retaining ring BR, the wall of the inner periphery PI is inserted into the recess EV formed radially in the substantially cylindrical part of the bearing housing LP.
- the REC receptacle also includes ER retaining elements closing the angular ends of the part, these angular elements extending radially along the outer peripheral wall PE and axially over the width of the annular surface SA.
- Radial CAN channels in the inner peripheral wall PI of the REC receptacle form a weir allowing oil to descend to lubricate the RB ball bearing and JD dynamic seal.
- FIG. 4 The position of the REC receptacle with respect to the ball bearing RB on the rotating shaft AT and with respect to the dynamic seal JD is shown in FIG. 4, without the CAR casing of the electric machine ME.
- the target sensor CC position is therefore located outside the CAR casing of the ME electric machine.
- An OR recess in the BR retaining ring allows the oil flowing between the dynamic seal JD and the ball bearing RB to flow into the lower part of the CAR crankcase.
- this recess OR is located radially between the outer ring of the ball bearing RB and the inner cylindrical wall of the bearing housing LP.
- the recess OR is located angularly closer to a horizontal plane (therefore orthogonal to the axis V) including the axis AX of the rotating shaft AT, and the vertical axis V passing through the axis AX of the rotating shaft.
- a heating resistor is placed in the lower part of the CAR casing.
- This heating resistor is connected to a circuit controlled by a computer connected to a temperature sensor.
- This temperature sensor reads the temperature of the OIL oil, or the ambient temperature.
- a low temperature threshold for example -10 ° C (degree Celsius)
- the computer supplies the circuit connected to the heating resistor, which then heats the OIL oil.
- an ECH heat exchanger is integrated in the CAR casing of the electric machine ME.
- This ECH exchanger is for example made up of a brine circuit machined in the lower part of the ME electric machine, and connected to a cooling circuit.
- the ECH exchanger is connected to the main cooling circuit of the vehicle, which cools the power electronics of the vehicle and is connected to the radiator located at the front of the vehicle.
- the oil being in direct contact with the rotor increases the mechanical losses at high speed.
- the electrical machine ME is therefore sized to operate at nominal over a speed threshold of up to 9000 revolutions per minute at most. This maximum nominal speed can be set a little lower, for example 8000 revolutions per minute.
- the vehicle using the electric traction machine ME does not require an internal oil projection circuit including in particular an oil pump.
- each bearing housing of the electrical machine ME is provided with a REC receptacle.
- the REC receptacle and the bearing housing are produced by casting in a single piece obtained by molding.
- a single CAN channel is molded in the part forming the REC receptacle.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1910241A FR3100946B1 (fr) | 2019-09-17 | 2019-09-17 | Machine électrique refroidie à l’huile |
| PCT/EP2020/072121 WO2021052676A1 (fr) | 2019-09-17 | 2020-08-06 | Machine électrique refroidie à l'huile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4032172A1 true EP4032172A1 (fr) | 2022-07-27 |
Family
ID=69172939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20754212.7A Pending EP4032172A1 (fr) | 2019-09-17 | 2020-08-06 | Machine électrique refroidie à l'huile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4032172A1 (fr) |
| CN (1) | CN114402509A (fr) |
| FR (1) | FR3100946B1 (fr) |
| WO (1) | WO2021052676A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12095335B2 (en) | 2022-07-26 | 2024-09-17 | Vault Motors LLC | Submersible-rated roller table motor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1015913A3 (nl) * | 2004-02-23 | 2005-11-08 | Atlas Copco Airpower Nv | Machine met verbeterde lagersmering. |
| US20080135339A1 (en) * | 2006-11-17 | 2008-06-12 | Miller Kent A | Method and apparatus for cooling and lubricating an off-axis motor/generator |
| US8169110B2 (en) * | 2009-10-09 | 2012-05-01 | GM Global Technology Operations LLC | Oil cooled motor/generator for an automotive powertrain |
| JP5500380B2 (ja) * | 2010-09-14 | 2014-05-21 | アイシン・エィ・ダブリュ株式会社 | 回転電機の冷却構造 |
| JP5961857B2 (ja) * | 2012-11-26 | 2016-08-02 | 株式会社明電舎 | 軸受潤滑油路構造 |
| DE102014111461B4 (de) * | 2014-08-12 | 2024-07-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ölfangvorrichtung und Getriebe mit einer solchen Ölfangvorrichtung |
| US10550892B2 (en) * | 2015-09-02 | 2020-02-04 | Nidec Motor Corporation | Motor bearing lubrication arrangement |
| JP2020513722A (ja) * | 2016-11-29 | 2020-05-14 | ティーエム4・インコーポレーテッド | 開放冷却アセンブリに組み合わされた封入冷却アセンブリが設けられた電気機械 |
| FR3066334B1 (fr) | 2017-05-10 | 2019-05-03 | Renault Sas | Systeme de refroidissement a huile d'une machine electrique |
-
2019
- 2019-09-17 FR FR1910241A patent/FR3100946B1/fr active Active
-
2020
- 2020-08-06 EP EP20754212.7A patent/EP4032172A1/fr active Pending
- 2020-08-06 CN CN202080064370.5A patent/CN114402509A/zh active Pending
- 2020-08-06 WO PCT/EP2020/072121 patent/WO2021052676A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3100946B1 (fr) | 2022-10-14 |
| FR3100946A1 (fr) | 2021-03-19 |
| WO2021052676A1 (fr) | 2021-03-25 |
| CN114402509A (zh) | 2022-04-26 |
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