CN112886760A

CN112886760A - Air cooling structure of motor

Info

Publication number: CN112886760A
Application number: CN202110377227.8A
Authority: CN
Inventors: 刘志鹏
Original assignee: Shanghai Zonggu Power Technology Center LP
Current assignee: Shanghai Zonggu Power Technology Center LP
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-06-01

Abstract

The invention discloses an air cooling structure of a motor, which comprises a rotor and a shell, wherein a stator is fixedly arranged in the shell, two ends of an air cavity in the stator are rotatably connected with the rotor, a bearing seat is fixedly arranged in an end cover, a bearing is rotatably connected in the middle of the bearing seat, the rotor penetrates through the two bearings and is positioned between the two bearings, an axial gap is formed between the rotor and the bearing seat, a radial gap is formed between the rotor and the stator, one end of the rotor is fixedly connected with a heat dissipation impeller, the heat dissipation impeller is positioned between the end covers at two sides, one side of the shell is provided with an air inlet, the other side of the shell is provided with an air outlet, the air cooling structure of the motor is simple, an additional cooling air driving device and a lubricating oil driving device are not needed, the impeller is fixedly connected on, the device does not need maintenance, and has high reliability, good heat dissipation effect and low cost.

Description

Air cooling structure of motor

Technical Field

The invention relates to the technical field of motors, in particular to an air cooling structure of a motor.

Background

The motor is widely used power equipment, the efficiency of any power equipment is not 100%, and loss is caused, that is, electric energy is not completely converted into mechanical energy output by the motor, but a part of the electric energy is converted into heat to be dissipated, the heat is accumulated in the motor and causes the temperature of internal parts of the motor to rise, the high temperature damages the internal parts of the motor, and therefore the heat must be dissipated through a heat dissipation device. The most conventional heat dissipation mode is that heat dissipation fins are arranged on a motor shell, heat inside the motor is dissipated to the air through the heat dissipation fins, and if the heat dissipation capacity of the static heat dissipation fins is insufficient, a fan can be arranged outside the motor shell to blow air to the motor, so that the air can take away the heat more quickly. If the cooling capacity of the wind is not enough, a cooling water channel can be embedded in the shell of the motor, and cooling water flows through the cooling water channel to take away heat.

The existing heat dissipation method only can enable the motor to generate heat and conduct the heat to the shell through internal heat transfer, and then the heat is dissipated through the shell, so that the heat dissipation of the area close to the shell is good, the heat dissipation of the area far away from the shell in the motor is not good, and for the permanent magnet motor, a core rotor is a permanent magnet, and the permanent magnet is afraid of high temperature, so the traditional heat dissipation method is not suitable for the permanent magnet motor.

Disclosure of Invention

The invention aims to provide an air cooling structure of a motor, which aims to solve the problem that the traditional heat dissipation method proposed in the background technology only can lead the heat generated by the motor to be transmitted to a shell through internal heat transfer and then be dissipated through the shell, so that the heat dissipation of the area close to the shell is good, the heat dissipation of the area far away from the shell in the motor is not good, and for a permanent magnet motor, a core rotor is a permanent magnet, and the permanent magnet is afraid of high temperature, so that the traditional heat dissipation mode is not suitable for the permanent magnet motor.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an air cooling structure of motor, includes rotor and casing, the equal fixed mounting in both ends of casing has the end cover, the inside fixed mounting of casing has the stator, the both ends of the inside air cavity of stator all rotate and are connected with the rotor, and the one end of every rotor all passes the outside of arranging the end cover in with the mounting hole, the inside fixed mounting of end cover has the bearing frame, the middle part of bearing frame rotates and is connected with the bearing, the rotor passes two bearings and is located between two bearings, form axial clearance between rotor and the bearing frame, form radial clearance between rotor and the stator, rotor one end fixedly connected with heat dissipation impeller, heat dissipation impeller is located between the end cover of both sides, the inlet port has been seted up to casing one side, the exhaust hole has been seted up to.

As a preferable aspect of the present invention, the heat radiation impeller includes a base, a centrifugal impeller located on one side of the base and located in the axial gap, and an axial impeller located outside the base and located inside the radial gap.

As a preferred embodiment of the present invention, other heat dissipation impellers are also fixedly connected to other positions of the rotor.

As a preferred embodiment of the present invention, the centrifugal impeller and the axial-flow impeller included in different heat dissipation impellers are different from each other.

As a preferred technical scheme of the invention, the outer surfaces of the air inlet hole and the air outlet hole are sleeved with dust covers.

As a preferred technical scheme of the invention, the air inlet is connected with a cooling air source, the air outlet is connected with an exhaust pipeline, and one side of the shell is provided with two wire outlet holes.

In a preferred embodiment of the present invention, a cooling water passage is embedded in the housing, and the cooling water passage is connected to a pipe through which cooling water flows in and out.

As a preferred technical solution of the present invention, the bearing is a rolling bearing or an air foil suspension bearing.

Compared with the prior art, the invention has the beneficial effects that:

the invention has simple structure, the centrifugal impeller is arranged in the axial gap, the impeller can drive air to flow through the bearing and enter the inner space of the motor through the axial gap, the airflow can dissipate heat for the bearing, the axial impeller can be arranged in the radial gap, the impeller can drive air to flow through the surface of the rotor and enter and leave the motor through the hole of the motor shell, the airflow can dissipate heat for the core rotor, the surface of the shell is provided with the air inlet and the air outlet, cooling air driven by the impeller can enter and exit the motor through the air inlet and the air outlet, no additional cooling air driving device or lubricating oil driving device is needed, the impeller is fixedly connected on the rotor of the motor, no maintenance is needed, the reliability is high, the heat dissipation effect is good, and the cost is low.

Drawings

FIG. 1 is a cross-sectional view of the present invention in its entirety;

FIG. 2 is a schematic structural view of the present invention as a whole;

FIG. 3 is a schematic view of the construction of the bearing of the present invention;

fig. 4 is a schematic structural view of the impeller of the present invention.

In the figure: 1. a rotor; 2. an end cap; 3. a housing; 4. a stator; 5. a bearing; 6. a heat dissipation impeller; 7. a substrate; 8. a centrifugal impeller; 9. an axial flow impeller; 10. an air inlet; 11. an exhaust hole; 12. a dust cover; 13. a bearing seat; 14. an axial clearance; 15. a radial gap; 16. a cooling water channel; 17. and (7) a wire outlet hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides an air cooling structure of a motor, which comprises a rotor 1 and a housing 3, wherein both ends of the housing 3 are fixedly provided with end caps 2, a stator 4 is fixedly provided inside the housing 3, both ends of an air cavity inside the stator 4 are rotatably connected with the rotor 1, and the one end of every rotor 1 all passes and is equipped with the ground mounting hole and arranges the outside in end cover 2, the inside fixed mounting of end cover 2 has bearing frame 13, the middle part of bearing frame 13 rotates and is connected with bearing 5, rotor 1 passes two bearing 5 and lies in between two bearing 5, form axial gap 14 between rotor 1 and the bearing frame 13, form radial gap 15 between rotor 1 and the

stator

4, 1 one end fixedly connected with heat dissipation impeller 6 of rotor, heat dissipation impeller 6 is located between the end cover 2 of both sides, inlet port 10 has been seted up to 3 one side of casing, exhaust hole 11 has been seted up to 3 opposite sides of casing.

Preferably, the heat dissipation impeller 6 comprises a base 7, a centrifugal impeller 8 and an axial impeller 9, the centrifugal impeller 8 is located on one side of the base 7, the centrifugal impeller 8 is located in the axial gap 14, the axial impeller 9 is located on the outer side of the base 7, the axial impeller 9 is located in the radial gap 15, and the heat dissipation impeller continues to flow to the left after being pushed by the axial impeller 9 until the heat dissipation impeller flows out of the exhaust hole 11, and the air flow can dissipate heat of the rotor 1.

Preferably, other heat dissipation impellers 6 are also fixedly connected to other positions of the rotor 1.

Preferably, the centrifugal impeller 8 and the axial impeller 9 included on the different heat-dissipating impellers 6 are different from each other.

Preferably, the outer surfaces of the air inlet hole 10 and the air outlet hole 11 are both covered with dust covers 12 to prevent external dust from entering the motor to cause failure.

Preferably, the air inlet 10 is connected with a cooling air source, the exhaust hole 11 is connected with an exhaust pipeline, the air inlet 10 is connected with the cooling air source, the axial-flow impeller 9 can drive air to flow along the axial direction, so that an air flow flows into the motor from the air inlet 10, the air flow continues to flow to the left after being pushed by the axial-flow impeller 9 until flowing out of the exhaust hole 11, the air flow can dissipate heat for the rotor 1, the air flow discharged by the centrifugal impeller 8 can be sucked by the axial-flow impeller 9 and finally flows out through the exhaust hole 11, two wire outlet holes 17 are formed in one side of the shell 3, and the shell is used for extending out a cable of.

Preferably, a cooling water channel 16 is embedded in the housing 3, and the cooling water channel 16 is connected to a pipeline through which cooling water flows in and out, and the cooling water channel 16 through which cooling water flows in and out enhances a heat dissipation effect.

Preferably, the bearing 5 is a rolling bearing or an air foil suspension bearing, and when the bearing 5 is a rolling bearing, the bearing gap is inside the bearing 5, and if the bearing 5 is an air foil suspension bearing, the bearing gap is between the bearing 5 and the rotor 1. The gas can flow in from outside the motor via the bearing gap and then out from the axial gap 14 to the outer radial side via the centrifugal impeller 8, which can dissipate heat from the bearing 5.

When the cooling water channel structure is used specifically, the end covers 2 are arranged at two ends of the shell 3, the stator 4 is arranged in the shell 3, the two rotors 1 are respectively arranged at two ends of an air cavity in the stator 4, the bearing seat 13 is arranged in the end cover 2, the bearing 5 is rotatably connected into the bearing seat 13, an axial gap 14 is formed between the rotor 1 and the bearing seat 13, a radial gap 15 is formed between the rotor 1 and the stator 4, the cooling impeller 6 is sleeved on the rotor 1 through the base body 7, a plurality of centrifugal impellers 8 are arranged at one side of the base body 7, the centrifugal impellers 8 are positioned in the axial gap 14, a plurality of axial-flow impellers 9 are arranged at the side of the base body 7, the axial-flow impellers 9 are positioned in the radial gap 15, two cooling water channels 16 are embedded into the two inner sides of the shell 3, air inlets 10 are respectively arranged at, the outer surface of the air inlet hole 10 and the outer surface of the air outlet hole 11 are both sleeved with dust covers 12 to prevent external dust from entering the motor to cause faults, one side of the shell 3 is provided with two outlet holes 17 for extending out a cable of the stator 4 to conveniently connect with an external power supply, the stator 4 is provided with electric energy, when the rotor 1 rotates, the heat dissipation impeller 6 also rotates along with the rotor 1, the centrifugal impeller 8 drives air to flow from the inner diameter side to the outer diameter side, because the bearing 5 is a moving part and a bearing gap is certainly formed inside the bearing 5, when the bearing 5 is a rolling bearing, the bearing gap is inside the bearing 5, when the bearing 5 is an air foil suspension bearing, the bearing gap is between the bearing 5 and the rotor 1, the air can flow in from the outside of the motor through the bearing gap and then flows out from the shaft gap 14 to the outer diameter side through the centrifugal impeller 8, and the, the axial-flow impeller 9 drives the air to flow along the axial direction, so that an air flow flows into the interior of the motor from the air inlet hole 10, continues to flow towards the left side after being pushed by the axial-flow impeller 9 until the air flows out from the air outlet hole 11, this air flow can dissipate heat from the rotor 1, and the air flow discharged from the centrifugal impeller 8 is sucked by the axial-flow impeller 9, and finally discharged through the discharge hole 11, if greater heat dissipation is desired, a source of cooling air may be placed upstream of the inlet vents 10 to reduce inlet air temperature, increase heat dissipation, or can also use the cooling water to strengthen the radiating effect through the embedded cooling water course 16 in the casing 3, this structure does not need extra cooling air drive arrangement, also does not need lubricating oil drive arrangement, and heat dissipation impeller 6 links firmly on the rotor 1 of motor, does not need to maintain, and the reliability is high, the radiating effect is good, with low costs.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. An air cooling structure of a motor comprises a rotor (1) and a shell (3), the two ends of the shell (3) are fixedly provided with the end covers (2), the interior of the shell (3) is fixedly provided with the stator (4), both ends of the air cavity inside the stator (4) are rotationally connected with rotors (1), one end of each rotor (1) passes through the installation hole provided with the ground and is arranged outside the end cover (2), a bearing seat (13) is fixedly arranged in the end cover (2), the middle part of the bearing seat (13) is rotatably connected with a bearing (5), the rotor (1) passes through the two bearings (5) and is positioned between the two bearings (5), an axial gap (14) is formed between the rotor (1) and the bearing seat (13), form radial clearance (15) between rotor (1) and stator (4), its characterized in that: one end of the rotor (1) is fixedly connected with a heat dissipation impeller (6), the heat dissipation impeller (6) is located between the end covers (2) on the two sides, an air inlet hole (10) is formed in one side of the shell (3), and an air exhaust hole (11) is formed in the other side of the shell (3).

2. An air-cooling structure of a motor according to claim 1, wherein: the heat dissipation impeller (6) comprises a base body (7), a centrifugal impeller (8) and an axial-flow impeller (9), the centrifugal impeller (8) is located on one side of the base body (7), the centrifugal impeller (8) is located in an axial gap (14), the axial-flow impeller (9) is located on the outer side of the base body (7), and the axial-flow impeller (9) is located inside the radial gap (15).

3. An air-cooling structure of a motor according to claim 1, wherein: other heat dissipation impellers (6) are also fixedly connected to other positions of the rotor (1).

4. An air-cooling structure of a motor according to claims 1, 2 and 3, wherein: the centrifugal impeller (8) and the axial flow impeller (9) contained on different heat dissipation impellers (6) are different.

5. An air-cooling structure of a motor according to claim 1, wherein: dust covers (12) are sleeved on the outer surfaces of the air inlet holes (10) and the outer surfaces of the exhaust holes (11).

6. An air-cooling structure of a motor according to claims 1 and 2, wherein: the air inlet hole (10) is connected with a cooling air source, the exhaust hole (11) is connected with an exhaust pipeline, and two wire outlet holes (17) are formed in one side of the shell (3).

7. An air-cooling structure of a motor according to claim 1, wherein: a cooling water channel (16) is embedded in the shell (3), and the cooling water channel (16) is connected with a pipeline through which cooling water flows in and out.

8. An air-cooling structure of a motor according to claim 1, wherein: the bearing (5) is a rolling bearing or an air foil suspension bearing.