CN110138145A - A kind of water cooling and the oily cold permanent magnet synchronous motor combined - Google Patents

A kind of water cooling and the oily cold permanent magnet synchronous motor combined Download PDF

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Publication number
CN110138145A
CN110138145A CN201910499608.6A CN201910499608A CN110138145A CN 110138145 A CN110138145 A CN 110138145A CN 201910499608 A CN201910499608 A CN 201910499608A CN 110138145 A CN110138145 A CN 110138145A
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China
Prior art keywords
oil
casing
rotor
water
cold
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CN201910499608.6A
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Chinese (zh)
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CN110138145B (en
Inventor
江轶
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SUZHOU LEGO MOTORS CO Ltd
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SUZHOU LEGO MOTORS CO Ltd
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Priority to CN201910499608.6A priority Critical patent/CN110138145B/en
Publication of CN110138145A publication Critical patent/CN110138145A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/32Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/19Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

A kind of water cooling and the oily cold permanent magnet synchronous motor combined, including casing, casing is interior to be equipped with stator assembly and rotor assembly, which includes shaft, rotor punching group and rotor press plate;The casing is equipped with oil inlet, and the cavity being connected to oil inlet is equipped in shaft, and shaft gets rid of oilhole equipped with what is be connected to cavity;The rotor punching group is equipped with and the oil passage getting rid of oilhole and be connected to;The rotor press plate is equipped with annular oil groove and the radial direction crossed and crosses oil groove;Each radial end for crossing oil groove towards rotating shaft core is crossed oil groove with annular and is connected to, and there are cross oil-gap to be connected between its other end and the casing and stator module;Oil trap is offered on the bottom of the casing inner wall, the bottom of the oil trap is equipped with oil return hole, which is connected to through oil pump with oil inlet;Also, cold water channel is equipped with inside the shell wall of the casing, one end of the cold water channel is picked out as the water inlet for being passed through cooling water, and the other end is also picked out as water outlet.

Description

A kind of water cooling and the oily cold permanent magnet synchronous motor combined
Technical field
The present invention relates to permanent magnet synchronous motor fields, more particularly to suitable for a kind of water cooling and oil of New-energy electric vehicle The cold permanent magnet synchronous motor combined.
Background technique
Permanent magnet synchronous motor is the power resources of new-energy automobile, and the motor is used as and mutually converts power supply and mechanical energy Critical component, played an important role in terms of new driving source, transformation efficiency and reliable and stable work are also in industry The key point that technology is captured.Current permanent magnet synchronous motor is to accomplishing efficiently and can stable work under various bad working environments The problem of making, radiating into the most important thing.Especially high-power motor is dissipated in the case where not increasing volume or weight The problem of heat especially looms large.
There are mainly two types of radiating modes for the prior art:
The first, rotor with trapped fuel face is tangent gets rid of oil;This radiating mode the problem is that: rotor is in contact with trapped fuel, when When rotor motion gets up, there is a situation where to stir oil, the resistance ratios for stirring oil are larger, especially the when marquis of motor high-speed rotation, seriously Slow motor speed is dragged, there is very big power loss.
Second, all oil is cooling for casing, and the additional heat exchanger of casing is cooling oil temperature simultaneously;This radiating mode is deposited The problem of be: electric machine structure is more complicated, and cooling oil path, which cannot be integrated in inside motor, forms one, needs to be extended with oil pipe Place other than to motor, and also to match the heat exchanger of certain power, increase cost, and reliability is not high, exists and lets out The risks such as impurity are mixed into dew oil or oil, the disadvantages of motor globality poor, shock resistance is poor, and motor overall efficiency is not high.
Summary of the invention
The present invention provides a kind of water cooling and the oily cold permanent magnet synchronous motor combined, it is therefore intended that the heat dissipation for solving motor is asked The problem of topic, formation heat island especially inside motor, especially for the heat dissipation problem of stator module end.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of water cooling and the cold permanent-magnet synchronous combined of oil Motor, including a casing, the casing is interior to be equipped with stator assembly and rotor assembly;The rotor assembly include a shaft, be located at turn Rotor punching group on axis and the rotor press plate that rotor punching group axial ends is set;The casing is equipped with an oil inlet Mouthful, it is equipped with a cavity along its axis direction in the shaft, cavity extension is connected to the oil inlet, and edge in the shaft It, which is radially provided with, gets rid of oilhole, this gets rid of oilhole and is connected to the cavity;
Oil passage is offered along its axial direction on the center hole wall of the rotor punching group, the oil passage gets rid of oilhole with described Connection;
The end face that each rotor press plate is mutually leaned on the rotor punching group crosses oil groove equipped with annular and radial direction crosses oil groove;Institute It states annular and crosses oil groove around the rotor press plate axial line one circle setting, and the annular crosses oil groove and each oil passage connects It is logical;The radial direction crosses oil groove being arranged radially along the rotor press plate, and multiple radial oil grooves of crossing are in the circumferential direction of rotor press plate Uniformly distributed, each radial end towards rotating shaft core for crossing oil groove is connected to annular oil groove, and its other end is towards described fixed The stator winding end of sub-component is arranged;
There are oil-gap is crossed between the casing and the stator winding end of stator module, this crosses oil-gap and the radial direction is excessively oily Slot is connected to towards one end of the stator winding end;
Oil trap is offered on the bottom of the casing inner wall, the bottom of the oil trap is equipped with an oil return hole, and the oil return hole is through one Oil pump is connected to the oil inlet;
Under working condition, oil in the oil trap, successively through oil return hole, oil pump, oil inlet, cavity, get rid of oilhole and flow to oil Channel, then the axial ends of rotor punching group is branched to by oil passage, oil groove is crossed through annular, multiple radial oil grooves of crossing converge to The stator winding end, finally passed through oil-gap and is back to oil trap, was constituted an oil circulation passage with this;
Also, a cold water channel is equipped with inside the shell wall of the casing, one end of the cold water channel is picked out as being passed through cooling water Water inlet, the other end also picks out as water outlet.
Related content in above-mentioned technical proposal is explained as follows:
1, in above scheme, the cold water channel includes two end face channel sections, which is divided into casing axis To both ends wall surface inside.
2, in above scheme, the end face channel section in the channel that a plane spiral is arranged by constituting.
3, in above scheme, the cold water channel includes the slot bottom channel section positioned at oil-collecting trench bottom.
4, in above scheme, the casing circumferential direction pars intramuralis is equipped with " S " type water channel in the circumferential, is somebody's turn to do pair of " S " type water channel The part of oil-collecting trench bottom should be located at as the slot bottom channel section.
Working principle of the present invention is:
It is oily first from oil groove, pass through oil pipe and oil filter is pumped into oil pump;Oil pipe is penetrated equipped with one in the outlet of oil pump directly will be high Pressure oil is injected into the cavity of shaft.After motor is turned over, oil gets rid of oilhole by two groups that shaft radially opens up and flows to rotor The oil passage of punching group, then flow to rotor press plate annular and cross oil groove, then be thrown out of rotor from radial oil groove of crossing, to determining for periphery Sub-component splashes.Oil falls on stator module end (end of stator winding) and also falls on the inner walls such as shell end cover, in gravity Under effect, being slipped in oil trap along wall also has sub-fraction oil by the slot on chassis end tegmental wall, guides on bearing, finally again It falls in oil trap, loops back and forth like this.Oil has obtained speedup twice in the entire system, is by gear oil pump handle for the first time Oil is from the cavity that the oil trap of bottom of shell is extracted into shaft, the work of centrifugal force when second of speedup is rotor assembly high speed rotation With making it finally obtain non-high kinetic energy from rotor assembly tangential direction with a clamp to the radial speedup in runner of rotor assembly Angle flies out, and shoots down and takes away heat in the places such as winding overhang or stator core and shell end cover.
The oil got on casing inner wall is cooled down by the cold water channel on casing, with this, oil could be recycled.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
1, motor of the invention is by cold water channel in conjunction with oily air-cooled structure, i.e., motor interior oil is cooling, and casing external water is cooling;This The heat dissipation effect that the novel composite radiating type of cooling of kind had both realized motor is more preferable, and inside does not form heat island, especially stator The end of the stator winding of component can take away heat by oil;It is simple that structure is realized again, and oil circuit is formed inside motor and followed Ring forms an entirety, allows motor can stable work under various bad working environments.
2, motor of the invention improves the working efficiency of motor due to good heat dissipation effect, improves motor high-speed working condition Under reliability.
Detailed description of the invention
Attached drawing 1 is diagrammatic cross-section of the invention;
Attached drawing 2 is rotor punching structure schematic diagram of the invention;
Attached drawing 3 is the structural schematic diagram of rotor press plate of the invention;
Attached drawing 4 is oil circuit schematic diagram of the invention.
In the figures above: 1, casing;11, end cap;111, oil inlet;2, stator module;31, shaft;311, cavity;312, Get rid of oilhole;32, rotor punching group;321, rotor punching;3211, iron core crosses oil groove;32111, oil passage;33, rotor press plate; 331, annular crosses oil groove;332, radial to cross oil groove;4, oil trap;41, filter screen;42, fuel outlet;43, oil return hole;51, oil strain Device;52, oil pump;53, oil pipe is penetrated;61, water inlet;62, water outlet;7, air gap;8, oil-gap is crossed.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
Embodiment one:
Referring to shown in attached drawing 1-4, a kind of water cooling and the cold permanent magnet synchronous motor combined of oil, including a casing 1, the shell is by cylinder Body and the end cap at cylinder both ends 11 are constituted, and stator module 2 and rotor assembly, stator module 2 and rotor assembly are equipped in the casing 1 Between there are air gaps 7;The rotor assembly includes that a shaft 31, the rotor punching group 32 being located in shaft 31 and setting are turning The rotor press plate 33 of sub- 32 axial ends of punching group;The stator module 2 includes stator core and stator winding;The rotor punching Piece group 32 is formed by multiple stator punchings 321 are stacked, and the rotor punching 321 and the shaft 31 are interference fitted.
The casing 1 is equipped with an oil inlet 111, and the shaft 31 is interior to be equipped with a cavity 311, the sky along its axis direction The extension of chamber 311 is connected to the oil inlet, and is radially equipped in the shaft 31 and is got rid of oilhole 312, this gets rid of oilhole 312 and institute State the connection of cavity 311.
Oil passage 32111 is offered along its axial direction on the center hole wall of the rotor punching group 32, the oil passage 32111 are formed by crossing oil groove 3211 along the iron core that it is axially opened up on the center hole wall of multiple rotor punchings;It is each described Rotor punching is equipped at least one iron core and crosses oil groove 3211, and with this, the iron core on multiple rotor punchings crosses the perforation of oil groove 3211 Form at least one oil passage 32111;Oil groove 3211 is crossed there are three iron core specifically, setting on each rotor punching, and Uniformly distributed in its circumferential direction, with this, the iron core on multiple rotor punchings crosses oil groove 3211 and is formed through three oil passages 32111; The oil passage 32111 is connected to the oilhole 312 that gets rid of;Specifically, when the oil passage 32111 is equipped with three, institute It states and gets rid of oilhole 312 and be provided with two groups, every group three, and each get rid of oilhole 312 and be connected to oil passage 32111.
Each rotor press plate 33 is equipped with annular with the end face that 32 phase of rotor punching group is leaned on and crosses oil groove 331 and diameter To oil groove 332 excessively;The annular crosses oil groove 331 around 33 axial line one of rotor press plate circle setting, and the annular is excessively oily Slot 331 is connected to each oil passage 32111;The radial direction crosses being arranged radially along the rotor press plate 33 of oil groove 332, and It is multiple it is radial cross that oil grooves 332 are uniformly distributed in the circumferential direction of rotor press plate 33, it is each it is described it is radial cross oil groove 332 towards 31 axle center of shaft End is crossed oil groove 331 with annular and is connected to, and the stator winding end of its other end towards the stator module 2 is arranged.
Between the casing 1 and the stator winding end of stator module 2 there are cross oil-gap 8, this cross oil-gap 8 with it is described Radial oil groove 332 of crossing is connected to towards one end of the stator winding end.
Oil trap 4 is offered on the bottom of 1 inner wall of casing, a filter screen 41, the filtering are additionally provided in the oil trap 4 Net 41 is used to filter the sundries in oil circuit, and such as iron filings are blocked with anti-damage motor and oil circuit;The bottom of the oil trap 4 is equipped with One oil return hole 43 and fuel outlet 42;The fuel outlet 42 is refueled and is drained the oil in motor before being convenient for work;The oil return hole 43 are connected to through an oil pump 52 with the oil inlet 111;It is additionally provided with oil filter 51 between the oil return hole 43 and the oil pump 52, it should Oil filter 51 prevents from being mixed into foreign matter oil pump 52 in oil circuit, and the oil return hole 43 is connected to by oil pipe with the oil filter 51, The oil filter 51 is connected to by oil pipe with the oil pump 52;The oil pump 52 is mounted on the end cap 11 of shell, and equipped with close Seal apparatus, the oil outlet of the oil pump 52 are connected with one and penetrate oil pipe 53, this is penetrated oil pipe 53 and protrudes into cavity 311.
Above-mentioned oil pump 52 is gear oil pump 52, which includes a direct current generator and a gear pump head, the direct current Motor needs to provide corresponding DC power supply (DC24V/ DC24V).
Under working condition, oil in the oil trap 4, successively through oil return hole 43, oil pump 52, oil inlet, cavity 311, get rid of Oilhole 312 flow to oil passage 32111, then the axial ends of rotor punching group 32 is branched to by oil passage 32111, through annular Oil groove 331, multiple radially mistake oil grooves 332 are crossed, gets rid of to winding overhang and is back to oil trap 4 by oil-gap 8, an oil is constituted with this and is followed Ring access;The oil can use ATF oil, and the ATF oil thermal coefficient is high, and has the effect of insulation.
Also, a cold water channel is equipped with inside the shell wall of the casing 1, one end of the cold water channel picks out cold as being passed through But the water inlet 61 of water, the other end are also picked out as water outlet 62.
Specifically, the shell is process by the high aluminium alloy of thermal conductivity.Specifically, the cold water channel includes two End face channel section, two end face channel sections are divided into inside the wall surface at the axial both ends of casing 1;The end face channel section by The channel of one plane spiral arrangement is constituted;The end face channel is cooling to be splashed to the heat that absorbs on the inner wall of end face Oil realizes better cooling effect.
Specifically, the cold water channel includes the slot bottom channel section positioned at 4 bottom of oil trap, due to absorbing the oil of heat It is eventually fallen in oil trap 4 by gravity, the heat of that oil trap 4 will be above elsewhere, so specially in oil trap 4 Bottom is equipped with slot bottom channel section, which can be clathrate, " s " shape etc..
Further, the circumferential pars intramuralis of the casing 1 also is provided with " S " type water channel in the circumferential, is somebody's turn to do the correspondence of " S " type water channel As the slot bottom channel section, being somebody's turn to do " S " type water channel is the prior art for part positioned at 4 bottom of oil trap;In this case slot Bottom channel section can both select the existing prior art, can also select the slot bottom channel section of above-mentioned special construction.
Above-mentioned cold water channel structure is only for example, and is also possible to the cold water channel of other structures, it is important that cold water channel It can realize that water cooling combines the cold purpose to radiate to motor of oil with cooling oil temperature.
Radiating principle: temperature increases after the oil absorption stator module 2 of splashing and the thermal energy of bearing, in the oil trap 4 that converges, Due to oil trap 4 be with the one of casing 1, be process by the high aluminium alloy of thermal conductivity, be connected with cooling in the cold water channel of casing 1 Water, the heat that then oil absorbs can timely be transmitted to casing 1 and be taken away by cooling water, to remain in oil trap 4 Oil temperature will not be too high.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.

Claims (5)

1. a kind of water cooling and the cold permanent magnet synchronous motor combined of oil, including a casing, the casing is interior to be equipped with stator module and turns Sub-component;The rotor assembly includes that a shaft, the rotor punching group being located in shaft and setting are axial in rotor punching group The rotor press plate at both ends;It is characterized by:
The casing is equipped with an oil inlet, is equipped with a cavity along its axis direction in the shaft, the cavity extend with it is described Oil inlet connection, and be radially equipped in the shaft and get rid of oilhole, this gets rid of oilhole and is connected to the cavity;
Oil passage is offered along its axial direction on the center hole wall of the rotor punching group, the oil passage gets rid of oilhole with described Connection;
The end face that each rotor press plate is mutually leaned on the rotor punching group crosses oil groove equipped with annular and radial direction crosses oil groove;Institute It states annular and crosses oil groove around the rotor press plate axial line one circle setting, and the annular crosses oil groove and each oil passage connects It is logical;The radial direction crosses oil groove being arranged radially along the rotor press plate, and multiple radial oil grooves of crossing are in the circumferential direction of rotor press plate Uniformly distributed, each radial end towards rotating shaft core for crossing oil groove is connected to annular oil groove, and its other end is towards described fixed The stator winding end of sub-component is arranged;
There are oil-gap is crossed between the casing and the stator winding end of stator module, this crosses oil-gap and the radial direction is excessively oily Slot is connected to towards one end of the stator winding end;
Oil trap is offered on the bottom of the casing inner wall, the bottom of the oil trap is equipped with an oil return hole, and the oil return hole is through one Oil pump is connected to the oil inlet;
Under working condition, oil in the oil trap, successively through oil return hole, oil pump, oil inlet, cavity, get rid of oilhole and flow to oil Channel, then the axial ends of rotor punching group is branched to by oil passage, oil groove is crossed through annular, multiple radial oil grooves of crossing converge to The stator winding end, finally passed through oil-gap and is back to oil trap, was constituted an oil circulation passage with this;
Also, a cold water channel is equipped with inside the shell wall of the casing, one end of the cold water channel is picked out as being passed through cooling water Water inlet, the other end also picks out as water outlet.
2. water cooling according to claim 1 and the cold permanent magnet synchronous motor combined of oil, it is characterised in that: the cold water is logical Road includes two end face channel sections, inside the wall surface at the both ends which is divided into chassis axial.
3. water cooling according to claim 2 and the cold permanent magnet synchronous motor combined of oil, it is characterised in that: the end face is logical Road section in the channel that a plane spiral is arranged by constituting.
4. water cooling according to claim 1 or 3 and the cold permanent magnet synchronous motor combined of oil, it is characterised in that: described cold Aquaporin includes the slot bottom channel section positioned at oil-collecting trench bottom.
5. water cooling according to claim 4 and the cold permanent magnet synchronous motor combined of oil, it is characterised in that: the casing week It is equipped with " S " type water channel in the circumferential to pars intramuralis, the correspondence for being somebody's turn to do " S " type water channel is located at the part of oil-collecting trench bottom as the slot Bottom channel section.
CN201910499608.6A 2019-06-11 2019-06-11 Water-cooling and oil-cooling combined permanent magnet synchronous motor Active CN110138145B (en)

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CN110138145B CN110138145B (en) 2024-03-22

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN110808659A (en) * 2019-11-11 2020-02-18 宜宾凯翼汽车有限公司 Electric drive assembly
CN111173902A (en) * 2020-03-10 2020-05-19 中南大学 Power transmission system
CN113452202A (en) * 2020-03-26 2021-09-28 上海埃迪特动力技术有限公司 Highly integrated high performance electric drive system power assembly
CN113675980A (en) * 2021-06-28 2021-11-19 东风汽车集团股份有限公司 Electric automobile and driving motor and power assembly thereof
WO2021238762A1 (en) * 2020-05-25 2021-12-02 精进电动科技股份有限公司 Hybrid cooling motor
CN113852236A (en) * 2020-06-28 2021-12-28 中车时代电动汽车股份有限公司 Water-oil combined cooling electric automobile driving system and electric automobile
WO2022028382A1 (en) * 2020-08-03 2022-02-10 安徽威灵汽车部件有限公司 Motor and vehicle
CN114552832A (en) * 2020-11-27 2022-05-27 比亚迪股份有限公司 Electric machine
CN114567102A (en) * 2022-03-03 2022-05-31 苏州睿控电动有限公司 Oil-cooled motor rotor cooling structure

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CN206948095U (en) * 2017-05-11 2018-01-30 江门市地尔汉宇电器股份有限公司 The motor that a kind of electric automobile water cooling and oil cooling combine
CN109327113A (en) * 2018-10-29 2019-02-12 深圳市泉胜新技术开发有限公司 A kind of oil-cooled motor cooling device
CN209896863U (en) * 2019-06-11 2020-01-03 苏州朗高电机有限公司 Water-cooling and oil-cooling combined permanent magnet synchronous motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110808659A (en) * 2019-11-11 2020-02-18 宜宾凯翼汽车有限公司 Electric drive assembly
CN111173902A (en) * 2020-03-10 2020-05-19 中南大学 Power transmission system
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CN113852236B (en) * 2020-06-28 2023-03-24 中车时代电动汽车股份有限公司 Water-oil combined cooling electric automobile driving system and electric automobile
CN113852236A (en) * 2020-06-28 2021-12-28 中车时代电动汽车股份有限公司 Water-oil combined cooling electric automobile driving system and electric automobile
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CN114552832A (en) * 2020-11-27 2022-05-27 比亚迪股份有限公司 Electric machine
CN114552832B (en) * 2020-11-27 2023-09-05 比亚迪股份有限公司 Motor with a motor housing
CN113675980A (en) * 2021-06-28 2021-11-19 东风汽车集团股份有限公司 Electric automobile and driving motor and power assembly thereof
CN114567102A (en) * 2022-03-03 2022-05-31 苏州睿控电动有限公司 Oil-cooled motor rotor cooling structure

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