CN114069940A - Strong air cooling structure of broadband variable frequency motor - Google Patents

Strong air cooling structure of broadband variable frequency motor Download PDF

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Publication number
CN114069940A
CN114069940A CN202111335651.2A CN202111335651A CN114069940A CN 114069940 A CN114069940 A CN 114069940A CN 202111335651 A CN202111335651 A CN 202111335651A CN 114069940 A CN114069940 A CN 114069940A
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CN
China
Prior art keywords
motor
air
driving end
air inlet
cooling
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
Application number
CN202111335651.2A
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Chinese (zh)
Inventor
周维
李国卿
李蕾
王月刚
薛睿
刘建桥
陈志鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CSIC Electrical Machinery Science and Technology Co Ltd
Original Assignee
CSIC Electrical Machinery Science and Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CSIC Electrical Machinery Science and Technology Co Ltd filed Critical CSIC Electrical Machinery Science and Technology Co Ltd
Priority to CN202111335651.2A priority Critical patent/CN114069940A/en
Publication of CN114069940A publication Critical patent/CN114069940A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium

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

Abstract

The invention discloses a strong air cooling structure of a broadband variable frequency motor, which solves the problem of how to meet the heat dissipation requirement of a high-power wide-frequency variable frequency motor and greatly reduce the occupied space of the whole equipment. A double-air-path cooling structure is adopted in the motor, the traditional form that an air-air heat exchange cooler is arranged at the top end of the motor is changed, the air-air heat exchange cooler is omitted, and a centrifugal fan on a rotating shaft of the motor is omitted; the driving end and the non-driving end on the front side of the motor shell are respectively provided with a front air inlet, the driving end and the non-driving end on the rear side of the motor shell are respectively provided with a rear air inlet, the middle part on the rear side of the motor shell is provided with an air outlet, the air outlet is connected with a cooling fan, and a double-loop strong air cooling air path is formed in the motor through the cooling fan; thereby realizing the strong air cooling of the motor and saving the occupied space of the whole device.

Description

Strong air cooling structure of broadband variable frequency motor
Technical Field
The invention relates to a variable frequency motor, in particular to a strong air cooling structure of a broadband variable frequency motor.
Background
In a large laboratory, a variable frequency motor with a wide frequency modulation range is generally configured, the motor needs to be frequently operated at a speed of 0-50Hz, the power density of the variable frequency motor is high, and the heat of the motor is very serious in the operation process; the ventilation cooling structure of this type of motor that has now generally adopts two wind path cooling structure, and concrete structure is: the top of the AS end and the BS end of the motor shell are respectively provided with an air inlet, the middle of the top end of the motor shell is provided with an air outlet, two ends of a motor rotating shaft in the motor shell are respectively provided with a centrifugal fan, a cooler fan cover with a larger volume is arranged above the top end of the motor shell, an axial air cooling pipe is distributed in the cooler fan cover, and the outer side of the cooler BS is provided with a cooling fan communicated with the air cooling pipe; when the motor runs, cold air in the cooler cover is sucked into the motor shell through the air inlets at the tops of the AS end and the BS end by virtue of the centrifugal fans at the two ends of the rotating shaft of the motor, the cold air sequentially passes through the axial air duct on the rotor of the motor and the radial air duct on the stator to cool the motor, heated air finally returns into the cooler cover through the air outlet, hot air returning into the cooler cover and cold air in the air cooling pipe perform air-air heat exchange, and the air after heat exchange and cooling enters the motor through the air inlets at the tops of the AS end and the BS end again to form a circulating air cooling system; the volume of the cooler shell of the cooling structure is basically close to that of the motor shell, so that the variable frequency motor and the cooler need to occupy larger installation space, but when the laboratory space is limited, the structure motor can meet the problem that the installation space cannot meet the requirement; particularly, when the variable frequency motor runs for a long time under the condition of very low frequency, the defect that the circulating air cooling system cannot meet the heat exchange requirement still exists, and aiming at the condition, the existing design is that a strong cooling fan is additionally arranged at the top of a cooler cover so as to accelerate the flowing speed of circulating cooling air in the motor and the cooling cover and meet the heat exchange requirement, but the requirement of equipment installation space is further increased due to the additional arrangement of the strong cooling fan; how to satisfy the heat dissipation requirement of the wide frequency conversion motor of high power to reduce the occupation space of whole equipment by a wide margin, become a problem that the scene needs to be solved.
Disclosure of Invention
The invention provides a strong air cooling structure of a broadband variable frequency motor, which solves the technical problems of meeting the heat dissipation requirement of a high-power wide-frequency variable frequency motor and greatly reducing the occupied space of the whole equipment.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: a double-air-path cooling structure is adopted in the motor, the traditional form that an air-air heat exchange cooler is arranged at the top end of the motor is changed, the air-air heat exchange cooler is omitted, and a centrifugal fan on a rotating shaft of the motor is omitted; the driving end and the non-driving end on the front side of the motor shell are respectively provided with a front air inlet, the driving end and the non-driving end on the rear side of the motor shell are respectively provided with a rear air inlet, the middle part on the rear side of the motor shell is provided with an air outlet, the air outlet is connected with a cooling fan, and a double-loop strong air cooling air path is formed in the motor through the cooling fan; thereby realizing the strong air cooling of the motor and saving the occupied space of the whole device.
A strong air cooling structure of a broadband variable frequency motor comprises a motor base and a cooling fan, wherein a front side air inlet of a driving end is arranged on the front side surface of a shell on one side of the driving end of the motor base; the middle part of the rear side face of the shell of the motor base is provided with an air outlet, the air outlet is connected with a cooling fan, a spoke type rotor support is arranged on a motor rotating shaft, a middle baffle plate is arranged in the middle part of the motor rotating shaft, and cooling air entering a driving end cover chamber through a driving end front side air inlet and a driving end rear side air inlet sequentially passes through a motor rotor left side axial air path on the left side of the middle baffle plate, a motor stator left side radial air path and the air outlet and is discharged to the outside of the motor after entering the cooling fan; the cooling air entering the non-drive end cover chamber through the non-drive end front air inlet and the non-drive end rear air inlet sequentially passes through the motor rotor right axial air path on the right side of the middle baffle, the motor stator right radial air path and the air outlet, enters the cooling fan and is discharged to the outside of the motor.
Shutters are arranged on the air inlet at the front side of the driving end, the air inlet at the front side of the non-driving end, the air inlet at the rear side of the driving end and the air inlet at the rear side of the non-driving end, and stainless steel wire woven meshes capable of preventing solids with the diameter of 1 mm from penetrating are arranged in the shutters.
The invention has the advantages of simple structure, low cost, good ventilation effect, low protection level and small volume, and can completely meet the requirement of indoor working environment of the motor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the present invention;
fig. 3 is a schematic view of the structure of fig. 2 in a left-hand direction.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a strong air cooling structure of a broadband variable frequency motor comprises a motor base 1 and a cooling fan 2, wherein a driving end front side air inlet 3 is arranged on the front side surface of a shell on one side of a driving end of the motor base 1, a non-driving end front side air inlet 4 is arranged on the front side surface of the shell on one side of a non-driving end of the motor base 1, a driving end rear side air inlet 5 is arranged on the rear side surface of the shell on one side of the driving end of the motor base 1, and a non-driving end rear side air inlet 6 is arranged on the rear side surface of the shell on one side of the non-driving end of the motor base 1; an air outlet 7 is arranged in the middle of the rear side face of a shell of a motor base 1, a cooling fan 2 is connected to the air outlet 7, a spoke type rotor support is arranged on a motor rotating shaft, a middle baffle plate 10 is arranged in the middle of the motor rotating shaft, and cooling air entering a drive end cover chamber 8 through a drive end front side air inlet 3 and a drive end rear side air inlet 5 sequentially passes through a motor rotor left side axial air path 11 on the left side of the middle baffle plate 10, a motor stator left side radial air path 12 and the air outlet 7, enters the cooling fan 2 and is discharged outside a motor; the cooling air entering the non-drive end cover chamber 9 through the non-drive end front air inlet 4 and the non-drive end rear air inlet 6 passes through the motor rotor right axial air passage 13, the motor stator right radial air passage 14 and the air outlet 7 on the right side of the middle baffle plate 10 in sequence, enters the cooling fan 2 and is discharged to the outside of the motor.
Shutters are arranged on the driving end front side air inlet 3, the non-driving end front side air inlet 4, the driving end rear side air inlet 5 and the non-driving end rear side air inlet 6, and stainless steel wire mesh meshes capable of preventing solids with the diameter of 1 mm from penetrating are arranged in the shutters; the motor body is of an axial and radial mixed ventilation structure, the cooling fan cover is of a forced ventilation structure with an exhaust fan, blades of a shutter arranged at an air inlet form an inclined angle of 60 degrees with the vertical direction, and an air outlet is of a forced fan with the exhaust fan and is of a strong air cooling structure with a protection grade IP 23.

Claims (2)

1.一种宽频变频电动机的强风冷结构，包括电机机座（1）和冷却风机（2），其特征在于，在电机机座（1）驱动端一侧的壳体前侧面上，设置有驱动端前侧进风口（3），在电机机座（1）非驱动端一侧的壳体前侧面上，设置有非驱动端前侧进风口（4），在电机机座（1）驱动端一侧的壳体后侧面上，设置有驱动端后侧进风口（5），在电机机座（1）非驱动端一侧的壳体后侧面上，设置有非驱动端后侧进风口（6）；在电机机座（1）的壳体后侧面中部，设置有出风口（7），在出风口（7）上连接有冷却风机（2），在电机转轴上，设置有轮辐式转子支架，在电机转轴中部设置有中间档板（10），经驱动端前侧进风口（3）和驱动端后侧进风口（5）进入到驱动端端盖室（8）的冷却风，是依次通过中间档板（10）左侧的电机转子左侧轴向风路（11）、电机定子左侧径向风路（12）、出风口（7），进入到冷却风机（2）中后排向电机外的；经非驱动端前侧进风口（4）和非驱动端后侧进风口（6）进入到非驱动端端盖室（9）的冷却风，是依次通过中间档板（10）右侧的电机转子右侧轴向风路（13）、电机定子右侧径向风路（14）、出风口（7），进入到冷却风机（2）中后排向电机外的。1. A strong air cooling structure for a wide-frequency variable frequency motor, comprising a motor frame (1) and a cooling fan (2), characterized in that, on the front side of the casing on the side of the drive end of the motor frame (1), a There is an air inlet (3) on the front side of the driving end, and an air inlet (4) on the front side of the non-driving end is arranged on the front side of the casing on the non-driving end side of the motor frame (1). On the rear side of the casing on the side of the driving end, there is an air inlet (5) on the rear side of the driving end, and on the rear side of the casing on the side of the non-driving end of the motor base (1), there is an air inlet on the rear side of the non-driving end. An air outlet (6); an air outlet (7) is arranged in the middle of the rear side of the housing of the motor frame (1), a cooling fan (2) is connected to the air outlet (7), and a spoke is arranged on the motor shaft Type rotor bracket, an intermediate baffle plate (10) is arranged in the middle of the motor shaft, and the cooling air enters the end cover chamber (8) of the driving end through the air inlet (3) on the front side of the driving end and the air inlet (5) on the rear side of the driving end. , is to enter the cooling fan (2) through the left axial air passage (11) of the motor rotor on the left side of the intermediate baffle (10), the radial air passage (12) on the left side of the motor stator, and the air outlet (7) in turn. The middle and rear rows are toward the outside of the motor; the cooling air entering the non-drive end cover chamber (9) through the non-drive end front air inlet (4) and the non-drive end rear air inlet (6) passes through the middle gear in turn. The axial air passage (13) on the right side of the motor rotor on the right side of the plate (10), the radial air passage (14) on the right side of the motor stator, and the air outlet (7) enter the cooling fan (2) and then discharge to the outside of the motor of. 2.根据权利要求1所述的一种宽频变频电动机的强风冷结构，其特征在于，在驱动端前侧进风口（3）上、非驱动端前侧进风口（4）上、驱动端后侧进风口（5）上和非驱动端后侧进风口（6）上，均设置有百叶窗，在百叶窗内均设置有可防止直径1毫米的固体穿过的不锈钢丝编织网。2. The strong air cooling structure of a wide frequency variable frequency motor according to claim 1, characterized in that, on the air inlet (3) on the front side of the driving end, on the air inlet (4) on the front side of the non-driving end, and on the driving end Blinds are arranged on the rear air inlet (5) and the rear air inlet (6) of the non-driving end, and a stainless steel wire woven mesh that can prevent solids with a diameter of 1 mm from passing through is arranged in the blinds.
CN202111335651.2A 2021-11-11 2021-11-11 Strong air cooling structure of broadband variable frequency motor Pending CN114069940A (en)

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Application Number Priority Date Filing Date Title
CN202111335651.2A CN114069940A (en) 2021-11-11 2021-11-11 Strong air cooling structure of broadband variable frequency motor

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Application Number Priority Date Filing Date Title
CN202111335651.2A CN114069940A (en) 2021-11-11 2021-11-11 Strong air cooling structure of broadband variable frequency motor

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CN114069940A true CN114069940A (en) 2022-02-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115263815A (en) * 2022-09-26 2022-11-01 西门子电机(中国)有限公司 Motor fan cover
CN116877431A (en) * 2023-09-07 2023-10-13 冰轮环境技术股份有限公司 Air-cooled variable-frequency screw compressor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201750288U (en) * 2010-03-12 2011-02-16 上海电气集团上海电机厂有限公司 Ventilation system of variable frequency motor
CN112186968A (en) * 2020-09-12 2021-01-05 中船重工电机科技股份有限公司 Direct air cooling structure of three-phase asynchronous variable frequency motor for electrically-driven fracturing
CN213661371U (en) * 2020-09-12 2021-07-09 中船重工电机科技股份有限公司 Heat insulation protection structure of double-wind-path cooling system of synchronous generator
CN217362760U (en) * 2021-11-11 2022-09-02 中船重工电机科技股份有限公司 Strong air cooling structure of broadband variable frequency motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201750288U (en) * 2010-03-12 2011-02-16 上海电气集团上海电机厂有限公司 Ventilation system of variable frequency motor
CN112186968A (en) * 2020-09-12 2021-01-05 中船重工电机科技股份有限公司 Direct air cooling structure of three-phase asynchronous variable frequency motor for electrically-driven fracturing
CN213661371U (en) * 2020-09-12 2021-07-09 中船重工电机科技股份有限公司 Heat insulation protection structure of double-wind-path cooling system of synchronous generator
CN217362760U (en) * 2021-11-11 2022-09-02 中船重工电机科技股份有限公司 Strong air cooling structure of broadband variable frequency motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115263815A (en) * 2022-09-26 2022-11-01 西门子电机(中国)有限公司 Motor fan cover
CN115263815B (en) * 2022-09-26 2023-02-03 西门子电机(中国)有限公司 Motor fan cover
CN116877431A (en) * 2023-09-07 2023-10-13 冰轮环境技术股份有限公司 Air-cooled variable-frequency screw compressor
CN116877431B (en) * 2023-09-07 2023-12-05 冰轮环境技术股份有限公司 Air-cooled variable-frequency screw compressor

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Application publication date: 20220218

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