CN218897150U

CN218897150U - Cooling device of permanent magnet synchronous motor

Info

Publication number: CN218897150U
Application number: CN202222845827.5U
Authority: CN
Inventors: 李红雨
Original assignee: Tianjin Jia Li Elevator Motor Co ltd
Current assignee: Tianjin Jia Li Elevator Motor Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-04-21
Anticipated expiration: 2032-10-27

Abstract

The utility model discloses a cooling device of a permanent magnet synchronous motor, which belongs to the technical field of permanent magnet synchronous motors, wherein a cooling channel is arranged in a motor shell and is communicated with a cooling shell, a porous plate and a baffle plate divide the cooling shell into a plurality of cavities, a diversion shell is arranged at the tops of a liquid collecting cavity and a rotating cavity, the diversion cavity is formed in the diversion shell, cooling liquid channel openings are respectively formed in the top wall of the liquid collecting cavity and the top wall of the rotating cavity, centrifugal blades are arranged in the rotating cavity, inner fins are arranged in a cooling cavity, outer fins are arranged outside the cooling shell and are connected with the inner fins through a heat conducting mechanism, the cooling shell is fixedly connected with the motor shell, and the motor is converted into a comprehensive cooling mode of air cooling and water cooling, and the comprehensive cooling mode has the advantages that the specific heat capacity of water is larger than that of wind is more favorable for heat dissipation, and the heat dissipation performance is obviously improved when the environment temperature is higher, so that the motor works efficiently and stably.

Description

Cooling device of permanent magnet synchronous motor

Technical Field

The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a cooling device of a permanent magnet synchronous motor.

Background

In the using process of the motor, the main heat generating area of the motor mainly occurs in the stator, when the internal temperature of the stator area is too high, the performance of the motor is greatly reduced, the energy consumption is increased, the loss of each part in the motor is improved, and therefore the service life of the motor is shortened.

The existing motor cooling device generally adopts a fan coaxial with the rotating shaft inside the motor so as to rotate, when the motor operates, the shaft of the motor drives the fan to rotate together to form flowing air flow, and heat on the motor is taken away through the air flow, so that the effect of cooling the motor is achieved.

However, because the service environment of the motor is not fixed, if the motor is placed in an environment with higher air temperature, the fan at the tail end of the common motor cannot meet the heat dissipation requirement, and the service life is reduced.

Disclosure of Invention

The utility model aims to solve the technical problems and further provides a cooling device of the permanent magnet synchronous motor.

In order to achieve the above purpose, the specific technical scheme of the utility model is as follows: the utility model relates to a cooling device of a permanent magnet synchronous motor, which is characterized by comprising: cooling channel, cooling shell, perforated plate, baffle, water conservancy diversion shell, coolant liquid access port, centrifugal blade, interior fin, outer fin and heat conduction mechanism, cooling shell and motor housing fixed connection, be provided with perforated plate and baffle in the cooling shell, perforated plate and baffle separate cooling shell from a left side to the right side into liquid collecting cavity, rotation cavity and heat dissipation cavity, motor housing inside is equipped with cooling channel, and two ports of cooling channel communicate with liquid collecting cavity and heat dissipation cavity respectively, the water conservancy diversion shell sets up on cooling shell, and the inside water conservancy diversion cavity that forms of water conservancy diversion shell, liquid collecting cavity and rotation cavity roof all open have the coolant liquid access port, coolant liquid access port and water conservancy diversion cavity intercommunication, centrifugal blade installs on motor rotor's rotation axis, and centrifugal blade sets up in the rotation cavity, interior fin sets up in the heat dissipation cavity, outer fin sets up outside cooling shell, outer fin passes through heat conduction mechanism and is connected with interior fin.

Further, the inner fin and the outer fin have the same structure.

Further, the heat conduction mechanism includes: the cooling device comprises an inner threaded connecting column and connecting bolts, wherein a plurality of inner threaded connecting columns are arranged on the inner fins, and the other ends of the inner threaded connecting columns penetrate through the cooling shell and are connected with the outer fins through the connecting bolts.

Further, sealing rings are arranged among the cooling shell, the porous plate and the partition plate and the rotating shaft of the motor rotor

Further, the centrifugal blade adopts a multi-piece open impeller structure.

Further, the motor shell and the tail part of the motor heat dissipation shell are provided with heat dissipation vent holes.

Further, a heat radiation fan for radiating heat of the outer fins is arranged at the non-output end of the rotating shaft of the motor rotor.

Furthermore, the internal thread connecting column and the connecting bolt are both copper structures.

Further, the cooling passage is spirally arranged inside the motor housing.

The utility model has the following beneficial effects:

compared with the pure air cooling, when the temperature of the environment where the motor is located is increased, the air cooling effect is reduced along with the increase of the air temperature, after the comprehensive cooling mode of the air cooling and the water cooling is adopted, the specific heat capacity of water is larger than that of wind, heat dissipation is facilitated, the cooling liquid directly absorbs heat from the motor shell, heat exchange is performed between the cooling liquid and the radiating fins, the heat dissipation performance is obviously improved when the temperature of the environment is higher, and efficient and stable operation of the motor is facilitated.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the mounting location of the cooling housing of the present utility model;

FIG. 3 is a schematic view of a centrifugal blade according to the present utility model;

the figure indicates:

the cooling device comprises a cooling channel 1, an internal threaded connecting column 101, a connecting bolt 102, a cooling shell 2, a porous plate 3, a partition plate 4, a diversion shell 5, cooling liquid channel openings 6, centrifugal blades 7, inner fins 8, outer fins 9, a heat conducting mechanism 10, a liquid collecting cavity 11, a rotating cavity 12, a heat dissipation cavity 13, a diversion cavity 14, a motor shell 15, a sealing ring 16 and a motor heat dissipation shell 17.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "middle," "outer," "inner," and the like indicate an orientation or a positional relationship, and are merely for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Embodiment one: a cooling device for a permanent magnet synchronous motor, as described with reference to fig. 1 to 3, comprising: the cooling device comprises a cooling channel 1, a cooling shell 2, a porous plate 3, a partition plate 4, a flow guiding shell 5, a cooling liquid channel opening 6, centrifugal blades 7, inner fins 8, outer fins 9 and a heat conducting mechanism 10, wherein the cooling shell 2 is fixedly connected with a motor shell 15, the porous plate 3 and the partition plate 4 are arranged in the cooling shell 2, the porous plate 3 and the partition plate 4 divide the cooling shell 2 into a liquid collecting cavity 11, a rotating cavity 12 and a heat radiating cavity 13 from left to right, and the liquid collecting cavity 11 has the following functions: concentrate the coolant liquid in the cooling channel 1, make things convenient for the coolant liquid to flow into in the rotation cavity 12 through the perforated plate, the effect of rotation cavity 12 is: the centrifugal blades 7 are accommodated, and the cooling liquid is flowed into the heat dissipation cavity 13 through the cooling liquid channel port by the diversion cavity 14, and the heat dissipation cavity 13 has the functions of: the inner fins 8 are accommodated, and after cooling liquid is subjected to heat dissipation, the cooling liquid flows out through the cooling channel 1 at the bottom of the heat dissipation cavity 13. The motor shell 15 is internally provided with a cooling channel 1, two ports of the cooling channel 1 are respectively communicated with a liquid collecting cavity 11 and a heat dissipation cavity 13, the flow guiding shell 5 is arranged on the cooling shell 2, a flow guiding cavity 14 is formed in the flow guiding shell 5, cooling liquid channel ports 6 are formed in the top walls of the liquid collecting cavity 11 and the rotating cavity 12, the cooling liquid channel ports 6 are communicated with the flow guiding cavity 14, the centrifugal blades 7 are arranged on a rotating shaft of a motor rotor, the centrifugal blades 7 are arranged in the rotating cavity 12, the inner fins 8 are arranged in the heat dissipation cavity 13, the outer fins 9 are arranged outside the cooling shell 2, the outer fins 9 are connected with the inner fins 8 through a heat conducting mechanism 10, so set up, make the motor change from simple forced air cooling to forced air cooling and water-cooling's comprehensive cooling mode, when the ambient temperature who locates the motor risees for simple forced air cooling, forced air cooling effect can present the multiple and descend along with the rising of temperature, after adopting forced air cooling and water-cooling's comprehensive cooling mode, water can be bigger than the specific heat capacity of wind, more do benefit to thermal dissipation, the coolant liquid directly absorbs the heat from motor housing, carry out heat exchange through coolant liquid and radiating fin, when ambient temperature is higher, heat dispersion obviously promotes, be favorable to the high-efficient stable work of motor.

Embodiment two: the cooling device of the permanent magnet synchronous motor is described by combining the attached drawings 1-3, the structures of the inner fins 8 and the outer fins 9 are the same, and the structure of the fins 8 and the outer fins 9 is adopted, so that the contact area between the fins and air can be effectively increased, the heat conduction area can be increased, the heat exchange performance is better, and the heat dissipation is better.

Embodiment III: a cooling device of a permanent magnet synchronous motor is described with reference to fig. 1 to 3, and the heat conducting mechanism 10 includes: the internal thread connecting column 101 and the connecting bolt 102 are arranged on the internal fin 8, a plurality of internal thread connecting columns 101 are arranged on the internal fin 8, the other end of the internal thread connecting column 101 penetrates through the cooling shell 2 and is connected with the external fin 9 through the connecting bolt 102, and the internal thread connecting column 101 and the connecting bolt 102 are arranged in such a way that the internal fin 8 and the external fin 9 can be fixed on the cooling shell 2 through the internal thread connecting column 101 and the connecting bolt 102, and heat exchange can be carried out through the internal thread connecting column 101 and the connecting bolt 102.

Embodiment four: the cooling device of the permanent magnet synchronous motor is described with reference to fig. 1-3, and sealing rings 16 are arranged among the cooling shell 2, the porous plate 3, the partition plate 4 and the rotating shaft of the motor rotor, so that the cooling device can ensure that the cooling liquid cannot leak in the cooling shell 2 by adding the sealing rings 16, and the motor is short-circuited. And meanwhile, the normal operation of the motor rotating shaft is ensured.

Fifth embodiment: the cooling device of the permanent magnet synchronous motor is described with reference to the accompanying drawings 1-3, and the centrifugal blades 7 are of a multi-blade open impeller structure, so that the centrifugal blades are compact in structure, free of vibration, low in noise, stable and reliable in operation, high in conveying capacity and capable of conveying cooling liquid with certain corrosiveness.

Example six: the cooling device of the permanent magnet synchronous motor is described with reference to fig. 1-3, and the tail parts of the motor shell 15 and the motor radiating shell 17 are provided with radiating vent holes, so that the cooling air flow can flow into the motor through the radiating vent holes arranged at the tail parts of the motor shell 15 and the cooling shell 2, and an air flow channel is added for air cooling.

Embodiment seven: the cooling device of the permanent magnet synchronous motor is described with reference to fig. 1-3, and a non-output end of a rotating shaft of a motor rotor is provided with a cooling fan for cooling the outer fins 9.

Example eight: the cooling device of the permanent magnet synchronous motor is described with reference to fig. 1-3, wherein the internal thread connecting column 101 and the connecting bolt 102 are both copper structures, and the copper structures are preferred in terms of manufacturing cost, heat conducting property and the like in the heat conducting property of metal, so that the heat radiating property is ensured, and the manufacturing cost is reduced.

Example nine: the cooling device of the permanent magnet synchronous motor is described with reference to fig. 1-3, and the cooling channels 1 are spirally arranged inside the motor housing 15, so that the contact area between the cooling channels 1 and the motor housing 15 is increased through the spiral arrangement of the cooling channels 1, and the heat of the motor housing 15 is more favorably conducted into the cooling liquid of the cooling channels 1.

The working process comprises the following steps:

firstly, cooling channel 1, cooling shell 2 and diversion shell 5 are filled with cooling liquid, after the motor is electrified and started, the rotating shaft of motor rotor drives centrifugal blade 7 to rotate to produce negative pressure, the cooling liquid passes through motor shell 15 to absorb heat produced in the motor, then the cooling liquid flows from cooling channel 1 to liquid collecting cavity 11, the cooling liquid flows to rotating cavity 12 through holes on porous plate 3, the cooling liquid in rotating cavity 12 is rotated by centrifugal blade 7, the cooling liquid passes through cooling liquid channel opening 6 from rotating cavity 12 to flow diversion cavity 14 to heat dissipation cavity 13, heat in the cooling liquid is conducted into outer fin 9 by inner fin 8 through heat conducting mechanism 10, the heat exchange of cold air flow driven by heat dissipating fan is completed to cool the cooling device, and then cooling liquid passes through cooling cavity 13 to flow to motor shell 15 through cooling channel 1 at bottom of heat dissipation cavity 13 to form complete cooling liquid flowing closed loop.

Claims

1. A cooling device for a permanent magnet synchronous motor, comprising: the cooling device comprises a cooling channel (1), a cooling shell (2), a porous plate (3), a partition plate (4), a diversion shell (5), a cooling liquid channel opening (6), a centrifugal blade (7), an inner fin (8), an outer fin (9) and a heat conduction mechanism (10), wherein the cooling shell (2) is fixedly connected with a motor shell (15), the porous plate (3) and the partition plate (4) are arranged in the cooling shell (2), the cooling shell (2) is divided into a liquid collection cavity (11), a rotating cavity (12) and a heat dissipation cavity (13) from left to right by the porous plate (3) and the partition plate (4), the cooling shell (15) is internally provided with the cooling channel (1), two ports of the cooling channel (1) are respectively communicated with the liquid collection cavity (11) and the heat dissipation cavity (13), the diversion shell (5) is arranged on the cooling shell (2), the cooling liquid channel opening (6) is formed in the top wall of the liquid collection cavity (11) and the rotating cavity (12), the cooling liquid channel opening (6) is communicated with the diversion cavity (14), the centrifugal blade (7) is arranged on a rotating shaft of the centrifugal blade (7) in the rotating shaft (7), the inner fins (8) are arranged in the heat dissipation cavity (13), the outer fins (9) are arranged outside the cooling shell (2), and the outer fins (9) are connected with the inner fins (8) through the heat conduction mechanism (10).

2. A cooling device for a permanent magnet synchronous motor according to claim 1, wherein: the inner fins (8) and the outer fins (9) have the same structure.

3. A cooling device for a permanent magnet synchronous motor according to claim 1, wherein: the heat conduction mechanism (10) includes: the cooling device comprises an inner threaded connecting column (101) and connecting bolts (102), wherein a plurality of inner threaded connecting columns (101) are arranged on the inner fins (8), and the other ends of the inner threaded connecting columns (101) penetrate through the cooling shell (2) and are connected with the outer fins (9) through the connecting bolts (102).

4. A cooling device for a permanent magnet synchronous motor according to claim 1, wherein: sealing rings (16) are arranged among the cooling shell (2), the porous plate (3), the partition plate (4) and the rotating shaft of the motor rotor.

5. A cooling device for a permanent magnet synchronous motor according to claim 1, wherein: the centrifugal blades (7) are of a multi-piece open impeller structure.

6. A cooling device for a permanent magnet synchronous motor according to claim 1, wherein: and the tail parts of the motor shell (15) and the motor radiating shell (17) are respectively provided with a radiating vent hole.

7. The cooling apparatus of a permanent magnet synchronous motor according to claim 4, wherein: and a radiating fan for radiating heat of the outer fins (9) is arranged at the non-output end of the rotating shaft of the motor rotor.

8. A cooling device for a permanent magnet synchronous motor according to claim 3, wherein: the internal thread connecting column (101) and the connecting bolt (102) are both copper structures.

9. A cooling device for a permanent magnet synchronous motor according to claim 1, wherein: the cooling channels (1) are arranged in a spiral manner inside the motor housing (15).