CN203261190U - Heat radiation structure of superspeed PMSM - Google Patents

Heat radiation structure of superspeed PMSM Download PDF

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Publication number
CN203261190U
CN203261190U CN 201320246585 CN201320246585U CN203261190U CN 203261190 U CN203261190 U CN 203261190U CN 201320246585 CN201320246585 CN 201320246585 CN 201320246585 U CN201320246585 U CN 201320246585U CN 203261190 U CN203261190 U CN 203261190U
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CN
China
Prior art keywords
stator
rotor
permanent magnet
cooling water
magnet synchronous
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Expired - Lifetime
Application number
CN 201320246585
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Chinese (zh)
Inventor
张宙
张晓敏
李光
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Shanghai Electric Group Shanghai Electric Machinery Co Ltd
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Shanghai Electric Group Shanghai Electric Machinery Co Ltd
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Priority to CN 201320246585 priority Critical patent/CN203261190U/en
Application granted granted Critical
Publication of CN203261190U publication Critical patent/CN203261190U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a heat radiation structure of a superspeed PMSM; the structure comprises a machine housing, a stator arranged in the machine housing, and a rotor arranged in the stator; the structure is characterized in that the machine housing is formed by a stator seat and a housing arranged in sequence from inside-out; the stator seat is a pipe structure with a cooling water interlayer; an air channel at least covering the cooling water interlayer is formed between the stator seat and an inner wall of the housing; the stator is fixedly arranged in the stator seat; furthermore, an axial-flow fan is arranged on a shaft of the rotor and is used for mandatorily generating air flow in an air path commonly formed by at least gaps between the stator and the rotor and the air channel. The advantages are that the axial-flow fan is arranged on the rotor shaft to form inner circulation wind in the motor; the inner circulation wind in the motor brings the heat on the rotor surface to the water cooling interlayer for partial cooling; and then the fan pressurizes and blows air into the gaps and a rotor ventilating port for cooling the rotor.

Description

A kind of radiator structure of ultrahigh speed permanent magnet synchronous motor
Technical field
The utility model relates to motor cooling technology field, relates in particular to a kind of radiator structure of ultrahigh speed permanent magnet synchronous motor.
Background technology
Motor radiating is one of main contents of design of electrical motor, and electric machine temperature rise will directly affect the winding insulation life-span, thereby is related to service life and the reliability of motor.Especially for permanent magnet synchronous motor, its stator winding is main heat generating components, temperature rise is too high can to reduce electric efficiency and insulation life, cause the distortion of motor partial structurtes, and the general temperature coefficient of its inner permanent magnetic material is higher, therefore poor heat stability, the too high permanent magnet irreversible demagnetization that causes of temperature rise especially will note controlling the heat load of motor.And for the permanent magnet synchronous motor (rotating speed is at 6500r/min and above) of ultrahigh rotating speed, the temperature rise during its operation is more remarkable, therefore especially should be noted that radiator structure.
The motor type of cooling kind of main flow is more at present, and a kind of common type of cooling is stator water-cooling, namely uses water as coolant, take away the heat that the motor operation produces, this cooling effect of motor is good, and cost is higher, needs the optional equipments such as band cooling circuit and heat exchanger.But existing water-cooled machine also comes with some shortcomings, and is mainly reflected in the structure of especially existing stator water-cooling, and it is too small that stator covers water area, causes cooling effect relatively poor, and rotor and bearing also can not get sufficient cooling.Especially for pot motor, in the situation of finite volume, it is unconformable that existing motor water cooling technology directly applies on it, therefore further the cooling system of motor is improved, and be necessary to improve its heat-sinking capability.
The utility model content
The purpose of the utility model embodiment is for the structural shortcoming of prior art, a kind of radiator structure of ultrahigh speed permanent magnet synchronous motor is proposed, by installation shaft flow fan on armature spindle, make motor internal form interior circulated air, the interior circulated air of motor internal is blowing into air gap and rotor ventilation mouth cooled rotor by the fan pressurization after the heat of rotor surface is taken to cooling water sandwich and partly cools off.
In order to reach above-mentioned utility model purpose, the radiator structure of a kind of ultrahigh speed permanent magnet synchronous motor that the utility model embodiment proposes is achieved through the following technical solutions:
A kind of radiator structure of ultrahigh speed permanent magnet synchronous motor, comprise casing, be located at the interior stator of casing, be located at the rotor in the stator, it is characterized in that: described casing is made of stator seat and shell from the inside to the outside successively, described stator seat is the tubular structure with cooling water sandwich, and form between this stator seat and the described outer casing inner wall and cover at least the outer air channel of described cooling water sandwich, described stator is fixedly mounted in this stator seat; In addition, the axle of described rotor is provided with aerofoil fan, is used at the wind path that jointly is made of the gap between described stator and the rotor and described air channel at least mandatory generation air-flow.
The cooling water sandwich of described stator seat covers half axial length of stator winding end on the described stator at least.
The rotor yoke of described rotor offers axial ventilation hole.
Described aerofoil fan is positioned at the inside of the stator winding of described stator first end, and the air-flow that makes its generation enters gap and described axial ventilation hole between described stator and the rotor by this first end place.
Be provided with a wind scooper with the coaxial setting of armature spindle in the stator winding of described first end, described aerofoil fan is positioned at described wind scooper, and the bore of this wind scooper dwindles gradually along the airflow direction in it.
Between described stator seat and the described shell by a plurality of joint pins interval and be fixedly connected with.
Described shell is provided with cooling water inlet and coolant outlet, described cooling water inlet and coolant outlet all by pipeline connection in described cooling water sandwich.
Described stator seat is cylindrical.
Compared with prior art, the beneficial effects of the utility model are: by installation shaft flow fan on armature spindle, make motor internal form interior circulated air, the interior circulated air of motor internal is blowing into air gap and rotor ventilation mouth cooled rotor by the fan pressurization after the heat of rotor surface is taken to cooling water sandwich and partly cools off.It is simple in structure, the design is ingenious, has solved existing super high speed electric machine and has caused the bad problem of motor radiating effect because aeration structure is unreasonable, and this motor volume is little, lightweight, and power density significantly improves, and the motor radiating performance significantly strengthens.
Description of drawings
By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.
Fig. 1 is the overall structure schematic diagram of the utility model embodiment motor;
Fig. 2 is the structural representation I of the utility model embodiment motor case part;
Fig. 3 is the structural representation II of the utility model embodiment motor case part.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail, so that technical staff's of the same trade understanding:
As Figure 1-3, label represents respectively:
Shell 1, rotor yoke 2, stator seat 3, cooling water sandwich 4, air channel 5, joint pin 6, armature spindle 7, aerofoil fan 8, wind scooper 9, stator body 10, stator winding 11, dynamic balancing dish 12, bearing 13, axial ventilation hole 14.
Shown in Fig. 1-3, a kind of radiator structure of ultrahigh speed permanent magnet synchronous motor is provided in the present embodiment, this motor comprises motor casing, rotor and stator.Wherein:
This motor casing comprises shell 1 and the end cap that is fixed on shell 1 both ends of the surface, and shell 1 and end cap define the cavity of a hollow jointly thus, in addition, in shell 1, also be coaxially arranged with stator seat 3, this stator seat 3 is roughly cylindrical, by with being located in the shell 1, and be configured to and the inwall of shell 1 between the interval arrange, to form uniform axial ducts 5.Specifically, be fixedly connected with by a plurality of joint pins 6 between described stator seat 3 and the described shell 1, those joint pins 6 are evenly distributed between stator seat 3 and the described shell 1.The inside of stator seat 3 is formed with cooling water sandwich 4, and is corresponding, and described shell 1 is provided with cooling water inlet and coolant outlet, this cooling water inlet and coolant outlet all by pipeline connection in described cooling water sandwich 4.
Stator is made of stator body 10 and the stator winding 11 that is fixed on stator body 10 two ends, and stator body 10 is fixedly mounted on the inner surface of this stator seat 3.And the cooling water sandwich 4 of described stator seat 3 covers half axial length of the stator winding 11 at described stator two ends.
Rotor is located in the stator, comprises armature spindle 7 and the rotor yoke 2 that radially extends from armature spindle 7, and armature spindle 7 is supported by bearing 13 and stretched out outside the shell 1.Rotor yoke 2 and stator are configured to form end play between them.And rotor yoke 2 also offers axial ventilation hole 14, makes air gap between the axial ventilation hole 14 of rotor yoke 2 and stator and rotor form the axial wind path of two-way parallel connection.
In addition, described armature spindle 7 is provided with aerofoil fan 8, and this aerofoil fan 8 is used for the wind path that air gap, axial ventilation hole 14 and described air channel 5 consist of jointly between by stator and rotor, and enforceable generation air-flow is realized the circulated air of shell 1 inside with this.For dwindling motor length, described aerofoil fan 8 is positioned at the inside of stator winding 11 of the first end of stator winding 11, follow the rotation of armature spindle 7, the air-flow that aerofoil fan 8 produces is entered between the described stator and rotor by this first end, and sends from the stator winding 11 of the second end.Be to reduce the pressure loss, the inboard of the stator winding 11 of first end also is provided with a wind scooper 9 with armature spindle 7 coaxial settings, and described aerofoil fan 8 is positioned at described wind scooper 9, and the bore of this wind scooper 9 reduces gradually along airflow direction in it.In the present embodiment, this wind scooper 9 is round table-like.
By such structure, when motor moved, what the cold water in the cooling water sandwich 4 continued lowered the temperature to stator; Simultaneously, aerofoil fan 8 on the armature spindle 7 makes motor internal form interior circulated air, wind scooper 9 place's air are pressurizeed by aerofoil fan 8, blow into air gap and rotor ventilation hole 14 cooled rotor yoke section 2 and armature spindles 7, and the hot blast that carries the rotor surface heat enters the cold water cooling in the water interlayer 4 that is cooled in the air channel 5, returns afterwards aerofoil fan 8 and again pressurizes.By such structure, solve existing super high speed electric machine and caused the bad problem of motor radiating effect because aeration structure is unreasonable, this motor volume is little, lightweight, and power density significantly improves, and the motor radiating performance significantly strengthens.
More than be elaborated for invention intention of the present utility model and execution mode by embodiment; but the utility model one of ordinary skill in the art be appreciated that; the above embodiment of the utility model only is one of preferred embodiment of the present utility model; be the length restriction; here can not all execution modes of particularize; any enforcement that can embody the utility model claim technical scheme is all in protection range of the present utility model.
It should be noted that; above content is in conjunction with concrete execution mode further detailed description of the utility model; can not assert that embodiment of the present utility model only limits to this; under the guidance of above-described embodiment; those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion drop in the protection range of the present utility model.

Claims (8)

1. the radiator structure of a ultrahigh speed permanent magnet synchronous motor, comprise casing, be located at the interior stator of casing, be located at the rotor in the stator, it is characterized in that: described casing is made of stator seat and shell from the inside to the outside successively, described stator seat is the tubular structure with cooling water sandwich, and form between this stator seat and the described outer casing inner wall and cover at least the outer air channel of described cooling water sandwich, described stator is fixedly mounted in this stator seat; In addition, the axle of described rotor is provided with aerofoil fan, is used at the wind path that jointly is made of the gap between described stator and the rotor and described air channel at least mandatory generation air-flow.
2. the radiator structure of a kind of ultrahigh speed permanent magnet synchronous motor according to claim 1, it is characterized in that: the cooling water sandwich of described stator seat covers half axial length of stator winding end on the described stator at least.
3. the radiator structure of a kind of ultrahigh speed permanent magnet synchronous motor according to claim 2, it is characterized in that: the rotor yoke of described rotor offers axial ventilation hole.
4. the radiator structure of a kind of ultrahigh speed permanent magnet synchronous motor according to claim 3, it is characterized in that: described aerofoil fan is positioned at the inside of the stator winding of described stator first end, and the air-flow that makes its generation enters gap and described axial ventilation hole between described stator and the rotor by this first end place.
5. the radiator structure of a kind of ultrahigh speed permanent magnet synchronous motor according to claim 4, it is characterized in that: be provided with a wind scooper with the coaxial setting of armature spindle in the stator winding of described first end, described aerofoil fan is positioned at described wind scooper, and the bore of this wind scooper dwindles gradually along the airflow direction in it.
6. the radiator structure of the described a kind of ultrahigh speed permanent magnet synchronous motor of any one according to claim 1-5 is characterized in that: between described stator seat and the described shell by a plurality of joint pins interval and be fixedly connected with.
7. the radiator structure of the described a kind of ultrahigh speed permanent magnet synchronous motor of any one according to claim 1-5, it is characterized in that: described shell is provided with cooling water inlet and coolant outlet, described cooling water inlet and coolant outlet all by pipeline connection in described cooling water sandwich.
8. the radiator structure of the described a kind of ultrahigh speed permanent magnet synchronous motor of any one according to claim 1-5, it is characterized in that: described stator seat is cylindrical.
CN 201320246585 2013-05-09 2013-05-09 Heat radiation structure of superspeed PMSM Expired - Lifetime CN203261190U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320246585 CN203261190U (en) 2013-05-09 2013-05-09 Heat radiation structure of superspeed PMSM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320246585 CN203261190U (en) 2013-05-09 2013-05-09 Heat radiation structure of superspeed PMSM

Publications (1)

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CN203261190U true CN203261190U (en) 2013-10-30

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CN 201320246585 Expired - Lifetime CN203261190U (en) 2013-05-09 2013-05-09 Heat radiation structure of superspeed PMSM

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107968526A (en) * 2017-12-28 2018-04-27 南京磁谷科技有限公司 A kind of enclosed cooling fan structure of magnetic suspension motor rotor
CN108258849A (en) * 2018-01-31 2018-07-06 华中科技大学 A kind of totally-enclosed high-speed permanent magnet motor of Liquid injection cooling
CN108539889A (en) * 2018-03-30 2018-09-14 合肥巨动力系统有限公司 A kind of permanent-magnetic synchronous motor rotor air-cooled structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107968526A (en) * 2017-12-28 2018-04-27 南京磁谷科技有限公司 A kind of enclosed cooling fan structure of magnetic suspension motor rotor
CN108258849A (en) * 2018-01-31 2018-07-06 华中科技大学 A kind of totally-enclosed high-speed permanent magnet motor of Liquid injection cooling
CN108539889A (en) * 2018-03-30 2018-09-14 合肥巨动力系统有限公司 A kind of permanent-magnetic synchronous motor rotor air-cooled structure

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CX01 Expiry of patent term

Granted publication date: 20131030

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