CN210780410U

CN210780410U - Air-cooled motor

Info

Publication number: CN210780410U
Application number: CN201922240410.4U
Authority: CN
Inventors: 赵彬; 宋萍萍; 孙贤洲
Original assignee: Qingdao CCS Electric Corp
Current assignee: Qingdao CCS Electric Corp
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-06-16
Anticipated expiration: 2029-12-13

Abstract

An air-cooled motor comprises a shell, a stator and a rotor, wherein a fan is arranged on the shell, and an air supply outlet of the fan is connected with an air inlet arranged on the shell; the stator is arranged in the shell, and a plurality of first air guide grooves which are axially arranged are arranged on the inner wall of the shell; a plurality of mounting holes for penetrating the winding are axially formed in the stator; the rotor is arranged in the stator in a penetrating mode, and a second air guide groove is axially formed in the outer wall of the rotor; one end of the shell is provided with a port, a ventilation end cover is arranged on the port, and a plurality of ventilation holes are formed in the ventilation end cover; the air inlet is positioned at one side of the stator, and the ventilation end cover is positioned at the other side of the stator. The air-cooled motor is characterized in that the air channels are axially arranged on the casing, the stator and the rotor, so that air flow sent into the casing by the fan can axially flow, flows through the casing, the stator and the rotor, fully takes away heat in the motor, is finally discharged through the ventilation holes in the ventilation end cover, and dissipates heat of a structure in the motor in a direct air-cooled heat dissipation mode, so that cooling pipes are not required to be arranged inside and outside the motor.

Description

Air-cooled motor

Technical Field

The utility model belongs to the electrical equipment field especially relates to an air-cooled motor.

Background

Most asynchronous motors are cooling systems using air as a cooling medium, known in the industry as motor ventilation. The ventilation systems of electric motors can be divided into two main categories, external ventilation (cooling of the surface of the machine casing) and internal ventilation, according to the main flow path of the cooling air in the machine, which is divided into three categories, axial ventilation, radial ventilation and axial-radial hybrid ventilation.

At present, the internal parts of domestic and external motor products are in a totally-enclosed radial ventilation mode, an air-air cooler is arranged at the top end, an external fan and an external fan cover are arranged at the non-shaft-extension end, and heat exchange is carried out between cold air of a cooling pipe in the cooler and hot air in a shell, so that the cooling purpose is achieved. The cooling pipe and the fan are arranged, so that the height and the length of the motor are larger, the volume occupation of equipment is increased, the structure is complex, and the weight is heavy.

SUMMERY OF THE UTILITY MODEL

The utility model discloses there is problem bulky, heavy, that the structure is complicated to above-mentioned current ventilation cold type motor, provides one kind can simple structure, small and light in weight's air-cooled motor.

In order to achieve the above object, the utility model discloses a technical scheme be:

an air-cooled motor comprises a shell, a stator and a rotor, wherein a fan is arranged on the shell, and an air supply outlet of the fan is connected with an air inlet arranged on the shell;

the stator is arranged in the shell, and a plurality of first air guide grooves which are axially arranged are formed in the inner wall of the shell;

a plurality of mounting holes for penetrating the winding are axially formed in the stator;

the rotor is arranged in the stator in a penetrating mode, and a second air guide groove is axially formed in the outer wall of the rotor;

a port is formed in one end of the shell, a ventilation end cover is mounted on the port, and a plurality of ventilation holes are formed in the ventilation end cover;

the air inlet is positioned on one side of the stator, and the ventilation end cover is positioned on the other side of the stator.

Preferably, the rotating shaft of the rotor is arranged in a shaft hole formed in the ventilation end cover, and the ventilation hole is circumferentially arranged by taking the shaft hole as a center.

Preferably, the vent holes are all aligned with corresponding mounting holes.

Preferably, the cross section of the vent hole is fan-shaped.

Preferably, a plurality of support ribs are axially arranged on the inner wall of the casing at intervals, and the first air guide groove is positioned between two adjacent support ribs.

Preferably, the supporting ribs are all inserted in mounting grooves formed in the outer wall of the stator.

Preferably, the air inlet is located on a side wall of the casing.

Preferably, the fan is a centrifugal fan.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the air-cooled motor is through at the casing, the axial sets up the wind channel on stator and the rotor, make the air current that the fan sent into in the casing can the axial flow, flow through the casing, stator and rotor, fully take away the heat in the motor, finally discharge through the ventilation hole on the ventilation end cover, structure in the motor is dispelled the heat through the radiating mode of direct forced air cooling, make the inside and outside of motor all need not to set up the cooling tube, moreover, the steam generator is installed to only need one side of motor, the whole axial length of equipment has been reduced, and the fan has the volume that has the smaller tube structure in the cooling tube structure, the holistic volume of equipment occupies has been reduced, the holistic weight of equipment has been reduced by a wide. In addition, the casing and the rotor are provided with the air duct, so that the weight of the structure of the casing and the rotor is reduced, and the overall weight of the equipment can be further reduced.

2. The ventilation hole sets up a week on the end cover that ventilates to make the air current that each department flows in the casing can both directly blow to the ventilation hole discharge, thereby accelerate thermal emission, guarantee the radiating efficiency. The mounting hole aligns the ventilation hole, makes the great winding that generates heat, can be taken away the heat back by the air current, and what direct I stopped discharges through the louvre for the air current velocity of flow of stator part to accelerate the radiating rate of the great part of calorific capacity, guarantee the whole radiating effect of motor. The ventilation holes are of fan-shaped cross sections, so that the ventilation air quantity of the ventilation holes can be improved to the maximum degree, and the heat dissipation efficiency is guaranteed.

3. The casing sets up the brace rod, has improved the mechanical strength of casing, and the setting of the wind-guiding groove of being convenient for simultaneously has reduced the processing degree of difficulty of equipment. The supporting rib is spliced with the mounting groove on the stator, can improve the fastness of stator, can hinder the circulation of air between the wind-guiding groove simultaneously, guarantees the axial flow of air current, improves the radiating efficiency.

4. The air inlet is arranged on the side wall of the shell, so that air flow input by the fan is blown into the shell in the radial direction, the air flow can be fully distributed in the shell, and therefore heat dissipation can be fully performed on all positions of the internal structure of the motor through all air guide channels, and the heat dissipation effect is improved.

Drawings

FIG. 1 is a front view structural diagram of the air-cooled motor of the present invention;

FIG. 2 is a front structural view of the air-cooled motor of the present invention without a blower and a ventilation end cap;

FIG. 3 is a side semi-sectional view of the air-cooled motor of the present invention without the fan and the ventilation end cap;

in the above figures: 1. a housing; 11. an air inlet; 12. a port; 13. supporting ribs; 2. a stator; 21. mounting holes; 22. Mounting grooves; 3. a rotor; 31. a rotating shaft; 4. a fan; 41. an air supply outlet; 51. a first air guide groove; 52. a second air guide groove; 6. a vent end cap; 61. a vent hole; 62. and the shaft hole.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 3, the present invention provides an air-cooled motor, which includes a casing 1, a stator 2 and a rotor 3.

The fan 4 is installed on the machine shell 1, the fan 4 is a centrifugal fan, and an air supply outlet 41 of the fan 4 is connected with an air inlet 11 arranged on the machine shell 1, so that air flow generated by the fan 4 is blown into the machine shell 1.

Stator 2 is fixed mounting in casing 1, and the outer wall of stator 2 and the inner wall contact cooperation of casing 1.

The inner wall of the casing 1 is provided with a plurality of first air guide grooves 51 which are axially arranged, and the outer wall of the stator 2 seals the notches of the first air guide grooves 51 to form a first air guide channel.

A plurality of mounting holes 21 are axially formed in the stator 2, the mounting holes 21 are used for penetrating and fixing the windings, and meanwhile, the mounting holes 21 can be used as second air guide channels, so that air flow can pass through spaces outside the windings in the mounting holes 21, and the air flow can flow through the stator 2.

The rotor 3 is arranged in the stator 2 in a penetrating way, is coaxial with the stator and can rotate under the electromagnetic action.

A second air guiding groove 52 is axially arranged on the outer wall of the rotor 3, and the second air guiding groove 52 can be used as a third air guiding channel to enable the air flow to axially flow through the rotor 3

One end of the casing 1 is provided with a port 12 for communicating the space inside and outside the casing 1 to assemble the stator 2 and the rotor 3.

A vent cap 6 is mounted to the port 12, and a plurality of vent holes 61 are provided in the vent cap 6 to allow air to flow between the inside and outside of the vent cap 6.

The air inlet 11 is positioned at one side of the stator 2, and the ventilation end cover 6 is positioned at the other side of the stator 2.

When the air inlet 11 is located at the front side of the stator 2 and the ventilation end cover 6 is located at the rear side of the stator 2, the air flow generated by the fan is sent into the space at the front side of the stator 2 in the casing 1 through the air inlet 11. The air flows from the space at the front side of the stator 2 to the space at the rear side of the stator 2 along the first air guide channel, the second air guide channel and the third air guide channel, and the heat on the shell 1, the stator 2 and the rotor 3 is taken away. The air carrying heat in the rear space of the stator 2 flows out of the motor through the vent holes 61 of the vent end cover 6 to realize heat dissipation.

Air flows through the three channels in the motor, and the heat on the machine shell 1, the stator 2 and the rotor 3 is sufficiently taken away, so that all parts of the motor can be cooled by air cooling, and the motor has high heat dissipation efficiency.

The fan 4 blows in the air to the motor and directly air-cools, need not set up the cooling tube of labyrinth complicacy in the motor, simple structure, light in weight consequently also can not have the cooling tube moreover and stretch out to occupy the problem in the outer space of motor outside the motor, has reduced the holistic volume of equipment and has occupy.

The arrangement of the first air guiding groove 51, the second air guiding groove 52 and the mounting hole 21 reduces the volume of the casing 1, the stator 2 and the rotor 3, thereby further reducing the weight of the equipment.

In order to sufficiently exhaust air carrying heat in the casing 1, the rotating shaft 31 provided in the rotor 3 is installed in a shaft hole 62 provided in the ventilation end cover 6, and the ventilation holes 61 are circumferentially arranged around the shaft hole 62, so that the ventilation holes 61 are distributed on a circumference around the shaft hole 62.

Each position of stator 2 rear side space in casing 1 all corresponds has ventilation hole 61, can make the air that has the heat pass ventilation end cover 6 fast and leave casing 1, high-efficient heat extraction.

Since the windings need to be annularly arranged on the stator 2, a plurality of mounting holes 21 also need to be annularly arranged by taking the central axis of the stator 2 as a center. In order to allow the air flow passing through the stator 2 to be rapidly discharged out of the casing 1, each of the ventilation holes 61 is aligned with the corresponding mounting hole 21.

The air having heat flowing through the mounting hole 21 can be directly aligned with the vent hole 61, thereby being rapidly discharged through the vent hole 61, and improving heat dissipation efficiency.

In order to increase the ventilation flow, the section of the ventilation hole 61 is fan-shaped, so that the strength of the ventilation end cover 6 can be ensured, and the sectional area of the ventilation hole 61 can be increased, so that more air flow can simultaneously pass through the ventilation end cover 6 and be discharged out of the enclosure 1.

In order to facilitate the processing and manufacturing, a plurality of support ribs 13 are axially arranged on the inner wall of the casing 1 at intervals.

The support ribs 13 are arranged at intervals and are annularly arranged on the inner wall of the machine shell 1 for a circle. The interval between adjacent support ribs 13 forms a first air guiding groove 51 on the inner wall of the casing 1, that is, the first air guiding groove 51 is arranged between two adjacent support ribs 13.

The support ribs 13 can serve as reinforcing ribs of the casing 1, and the structural strength of the casing 1 itself is improved. Meanwhile, the first air guide groove 51 is formed without turning, so that the manufacturing difficulty of the machine shell 1 is reduced.

In order to improve the firmness of the stator 2, the supporting ribs 13 are all inserted in the mounting grooves 22 arranged on the outer wall of the stator 2.

Every brace rod 13 all pegs graft in the mounting groove 22 that corresponds, makes casing 1 and stator 2 be connected inseparabler, and first wind-guiding groove 51 both sides edge is sealed, is difficult to produce the flow of air current between the adjacent first wind-guiding groove 51 to guarantee the whole axial flow of air in the first wind-guiding passageway, guarantee the flow of air current, take away the heat on casing 1 and the stator 2 fast.

The plug connection also limits the degree of freedom of the stator 2, thereby preventing the stator 2 from rotating and deviating and ensuring the firmness of the stator 2.

In order to distribute the air flow sufficiently, the air inlet 11 is located on the side wall of the cabinet 1.

The air flow generated by the fan is sent from the air inlet 11 on the side wall of the machine shell 1, so that the air flow can flow into the machine shell 1 in the radial direction. The air with lower temperature is fully distributed in the casing 1 at the front side of the stator 2, so that more air with lower temperature can flow into each of the first air guide groove 51, the second air guide groove 52 and the mounting hole 21, the heat on each part of the internal structure of the motor is taken away, and the internal structure of the motor is fully cooled and radiated.

Claims

1. An air-cooled motor is characterized by comprising a casing (1), a stator (2) and a rotor (3), wherein a fan (4) is arranged on the casing (1), an air supply outlet (41) of the fan (4) is connected with an air inlet (11) arranged on the casing (1),

the stator (2) is arranged in the shell (1), and a plurality of first air guide grooves (51) which are axially arranged are formed in the inner wall of the shell (1);

a plurality of mounting holes (21) for penetrating windings are axially formed in the stator (2);

the rotor (3) penetrates through the stator (2), and a second air guide groove (52) is axially arranged on the outer wall of the rotor (3);

a port (12) is formed in one end of the shell (1), a ventilation end cover (6) is installed on the port (12), and a plurality of ventilation holes (61) are formed in the ventilation end cover (6);

the air inlet (11) is located on one side of the stator (2), and the ventilation end cover (6) is located on the other side of the stator (2).

2. The air-cooled motor according to claim 1, wherein the rotation shaft (31) of the rotor (3) is fitted in a shaft hole (62) of the ventilating end cover (6), and the ventilating holes (61) are circumferentially arranged centering on the shaft hole (62).

3. The air-cooled electric machine according to claim 2, wherein the ventilation holes (61) are each aligned with a corresponding mounting hole (21).

4. The air-cooled motor according to claim 1, wherein the cross section of the ventilation holes (61) is fan-shaped.

5. The air-cooled motor according to claim 1, wherein a plurality of support ribs (13) are axially and alternately arranged on the inner wall of the casing (1), and the first air guide groove (51) is positioned between two adjacent support ribs (13).

6. An air-cooled electric machine according to claim 5, characterised in that the support ribs (13) are each inserted in a mounting groove (22) provided in the outer wall of the stator (2).

7. The air-cooled electric machine according to claim 1, wherein the air inlet (11) is located on a side wall of the casing (1).

8. An air-cooled electrical machine according to claim 1, characterised in that the fan (4) is a centrifugal fan.