CN110460197B

CN110460197B - Rotor baffle and motor

Info

Publication number: CN110460197B
Application number: CN201910796929.2A
Authority: CN
Inventors: 贾武豪; 卢素华; 方磊
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-10-16
Anticipated expiration: 2039-08-27
Also published as: CN110460197A

Abstract

The application provides a rotor baffle and a motor, which comprise a plate body, an overflowing channel (13) arranged on the plate body and a plurality of fan blades (14) arranged in the overflowing channel (13); the fan blade (14) comprises a first section (141) and a second section (142), an included angle is formed between the first section (141) and the second section (142), the rotor baffle (1) rotates along with the rotor (2), and the fan blade (14) is used for guiding cooling fluid to the opposite side from one side of the rotor baffle (1). The rotor baffle provided by the embodiment of the invention can accelerate the gas circulation speed in the motor, improve the cooling efficiency and reduce the temperature rise of the motor.

Description

Rotor baffle and motor

Technical Field

The application belongs to the technical field of motors, and particularly relates to a rotor baffle and a motor.

Background

The existing motor is cooled by adopting a shell surface cooling mode, heat generated in the motor is transferred to the surface of the shell through air in the motor, the surface of the shell is cooled by a cooling fan at the tail part of the motor and outside air, the cooling mode leads the one end, far away from the cooling fan, of the motor to be incapable of obtaining good heat dissipation, the temperature rise of the one end, far away from the cooling fan, of the motor is high, and the motor is easy to damage.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a rotor baffle, motor, can accelerate the inside gas circulation speed of motor, improves cooling efficiency, reduces the temperature rise of motor.

In order to solve the problems, the application provides a rotor baffle, which comprises a plate body, an overflowing channel arranged on the plate body and a plurality of fan blades arranged in the overflowing channel;

the fan blade comprises a first section and a second section, an included angle is formed between the first section and the second section, the rotor baffle rotates along with the rotor, and the fan blade is used for guiding cooling fluid to the opposite side from one side of the rotor baffle.

Preferably, the rotor baffle comprises an inner disc and an outer ring, the transfer passage being located between the inner disc and the outer ring.

Preferably, the first section extends out of the plane of the outer ring.

Preferably, the second section extends from one end of the inner disc to the other end of the inner disc in a twisting manner, the second section comprises a first end face and a second end face which are oppositely arranged, and the first end face is connected with the first section.

Preferably, the second section further comprises a third end surface and a fourth end surface which are oppositely arranged, the third end surface is connected with the second end surface to form a first corner, the fourth end surface is connected with the second end surface to form a second corner, the first corner is connected to the inner disc, and the second corner is connected to the outer ring.

Preferably, a midpoint of an intersection line of the first end surface and the third end surface is a1, a midpoint of an intersection line of the first end surface and the fourth end surface is a2, a connecting line of a1 and a2 is L1, a midpoint of an intersection line of the second end surface and the third end surface is B1, a midpoint of an intersection line of the second end surface and the fourth end surface is B2, a connecting line of B1 and B2 is L2, and an included angle between projections of L1 and L2 in a plane where the inner disc is located is not less than 30 ° and not more than 70 °.

Preferably, the projection length of the second end face in the radial direction of the plate body in the plane of the plate body is L3, the plate body has an annular structure, the annular width of the plate body is L4, and L3 is not less than one third of L4.

Preferably, the second sections of the adjacent fan blades are overlapped, and the overflowing channel is formed between the two overlapped second sections.

Preferably, the width of one end of the fan blade close to the inner disc is larger than that of one end close to the outer ring.

Preferably, dynamic balance preformed holes are uniformly arranged on the plate body in the circumferential direction.

In another aspect of the invention, an electric machine is provided, comprising the rotor guard described above.

Preferably, the motor includes a rotor and a heat dissipation fan, the rotor baffle includes a first rotor baffle, the rotor is disposed coaxially with the first rotor baffle, and the first rotor baffle is located at an end of the rotor away from the heat dissipation fan.

Preferably, the rotor baffle further includes a second rotor baffle, the rotor and the second rotor baffle are coaxially disposed, the second rotor baffle is located at one end of the rotor close to the heat dissipation fan, and the air exhaust directions of the first rotor baffle and the second rotor baffle are the same.

Preferably, the motor includes the stator, the yoke portion of stator is provided with yoke portion through-flow hole, the rotor includes magnet steel and magnet steel groove, the circulation gap has between magnet steel and the magnet steel groove, the passageway that overflows of first rotor baffle the circulation gap the passageway that overflows of second rotor baffle with yoke portion through-flow hole forms part of cooling circuit.

Advantageous effects

The rotor baffle provided by the embodiment of the invention can accelerate the gas circulation speed in the motor, improve the cooling efficiency and reduce the temperature rise of the motor.

Drawings

FIG. 1 is a front view of an embodiment of the present application;

FIG. 2 is a schematic rear perspective view of an embodiment of the present application;

FIG. 3 is a schematic cross-sectional structure of an embodiment of the present application;

fig. 4 is a schematic structural diagram of a fan blade according to an embodiment of the present application;

fig. 5 is a schematic structural view of a second section of a fan blade according to an embodiment of the present application;

FIG. 6 is a half sectional view of a rotor baffle of an embodiment of the present application;

fig. 7 is a sectional view of a motor according to an embodiment of the present application.

The reference numerals are represented as:

1. a rotor baffle; 11. an outer ring; 12. an inner disc; 13. an overflow channel; 14. a fan blade; 141. a first stage; 142. a second stage; 1421. a first end face; 1422. a second end face; 1423. a third end face; 1424. a fourth end face; 1425. a first corner portion; 1426. a second corner portion; 15. dynamic balance preformed holes; 16. mounting holes; 17. a through hole of the rotating shaft; 2. a rotor; 21. a flow-through slit; l3, the projection length of the fan blade in the plane of the plate body along the radial direction of the plate body; l4, the difference between the outer diameter of the plate body and the radius of the through hole of the rotating shaft.

Detailed Description

Referring to fig. 1 to 6 in combination, according to an embodiment of the present application, a rotor baffle includes a plate body, an overflow channel 13 disposed on the plate body, and a plurality of fan blades 14 disposed in the overflow channel 13; the fan blades 14 comprise a first section 141 and a second section 142, the first section 141 and the second section 142 form an included angle, the rotor baffle 1 rotates with the rotor 2, and the fan blades 14 are used for guiding cooling fluid from one side of the rotor baffle 1 to the opposite side. Through setting up the baffle, and set up on the baffle and flow through passageway 13 and fan blade 14, when rotor baffle 1 rotated along with rotor 2, rotor baffle 1 can be with being located in the motor and in rotor 2 outside air introduction to rotor 2, cool off in rotor 2, and with the motor, especially the heat that the radiator fan one end was kept away from to the stator takes to the motor one end that is close to radiator fan, make hot-air cool off fast, because of being airtight space in the motor, the air after the cooling returns one side that the radiator fan was kept away from to the motor baffle again, again inhaled to rotor 2 in, circulation cools off rotor 2, can accelerate the inside gas circulation speed of motor, improve cooling efficiency, reduce the temperature rise of motor.

Furthermore, the motor is a closed space, and the cooling fluid is air in the motor.

Rotor baffle 1 includes inner disc 12 and outer loop 11, overflows passageway 13 and is located between inner disc 12 and the outer loop 11, and then has guaranteed that it sets up to overflow passageway 13 circumference on the plate body, has improved the stability of plate body when the air current flows through the plate body.

Furthermore, the flow passage 13 is arranged on the plate body in a circular ring shape, the fan blade 14 is connected to the inner wall of the flow passage 13, and the fan blade 14 drives air to flow through the flow passage 13, so that the air flows in the motor, and further the rotor 2 is cooled.

Furthermore, the plate body is circular, and the flow passage 13 and the plate body are coaxially arranged, so that the stability of the plate body when air flows through the plate body is further ensured.

Further, a plurality of fan blades 14 are evenly arranged in the flow passage 13 and are circumferentially arranged along the central axis of the baffle, so that smooth air flow is ensured, and the uniform stress of the plate body is ensured.

Further, a plurality of dynamic balance reserved holes 15 are uniformly formed in the inner disc 12 along the axial lead of the inner disc 12 and used for inserting balance blocks to correct the dynamic balance of the rotor 2.

Further, a plurality of mounting holes 16 are uniformly formed in the inner disc 12 along the axial line of the inner disc 12, and are used for connecting the rotor 2 and the rotor baffle 1, so that the rotor 2 and the rotor baffle 1 are formed into a whole.

Further, a rotating shaft through hole 17 is formed in the center portion of the inner disc 12, and the inner disc 12 is sleeved on the motor shaft through the rotating shaft through hole 17.

The first section 141 extends out of the plane of the outer ring 11, so that air can be better introduced between the second section 142 and the overflowing channel 13, an air gathering effect can be achieved, and the wind guiding capacity of the fan blades 14 is enhanced.

Further, the top surface of the inner disc 12 and the top surface of the outer ring 11 are located in the same plane, the bottom surface of the inner disc 12 and the bottom surface of the outer ring 11 are located in the same plane, and the first section 141 is located on the top surface side of the outer ring 11 and extends out of the plane where the top surface of the outer ring 11 is located.

Further, the second section 142 is located between the plane of the top surface and the plane of the bottom surface of the outer ring 11.

Furthermore, the joints of the first section 141 and the second section 142 with the inner disk 12 and the outer ring 11 are provided with cambered structures so as to be better connected to the outer ring 11 and the inner disk 12.

The second section 142 is twisted and extended from one end of the inner disc 12 to the other end of the inner disc 12, the second section 142 includes a first end surface 1421 and a second end surface 1422 which are oppositely arranged, and the first end surface 1421 is connected with the first section 141, so that when the fan blades 14 drive air, the air generates vortex, the interior of the rotor 2 can be better cooled, and heat in the rotor 2 is taken away.

Further, the second segment 142 has a twist angle of not more than 180 °.

As shown in fig. 4, the second segment 142 further includes a third end surface 1423 and a fourth end surface 1424, which are oppositely disposed, the third end surface 1423 is connected to the second end surface 1422 to form a first corner 1425, the fourth end surface 1424 is connected to the second end surface 1422 to form a second corner 1426, the first corner 1425 is connected to the inner disk 12, and the second corner 1426 is connected to the outer ring 11, so that the fan blades 14 generate a larger vortex when driving air, and the rotor 2 is better cooled.

Further, as shown in fig. 5, the second end surface 1422 has a bevel structure on both left and right sides to generate a vortex.

The middle point A1 of the intersection line of the first end surface 1421 and the third end surface 1423, the middle point of the intersection line of the first end surface 1421 and the fourth end surface 1424 is A2, the connecting line of A1 and A2 is L1, the middle point B1 of the intersection line of the second end surface 1422 and the third end surface 1423, the middle point of the intersection line of the second end surface 1422 and the fourth end surface 1424 is B2, the connecting line of B1 and B2 is L2, the included angle of the projection of L1 and L2 in the plane of the inner disc 12 is not less than 30 degrees and not more than 70 degrees, and the air can be better swirled.

As shown in fig. 1, the projection length L3 of the second end surface 1422 in the radial direction of the plate body in the plane of the plate body, the plate body has an annular structure, the annular width of the plate body is L4, and L3 is not less than one third of L4, so that the air can be better swirled, and the blades can be ensured to generate strong wind power to make the air flow through the motor.

The second sections 142 of the adjacent fan blades 14 are overlapped, the overflowing channel 13 is formed between the two overlapped second sections 142, and the fan blades 14 can better collect and push air and can ensure that the air entering the overflowing channel 13 is blown out in a certain direction by forming the overflowing channel 13.

The width of one end of the fan blade 14 close to the inner disc 12 is larger than that of one end close to the outer ring 11.

As shown in fig. 7, in another aspect of the present embodiment, there is provided a motor including the rotor guard 1 described above.

The motor includes rotor 2 and radiator fan, and rotor baffle 1 includes first rotor baffle, and rotor 2 sets up with first rotor baffle is coaxial, and first rotor baffle is located rotor 2 and keeps away from radiator fan's one end. The rotor baffle 1 further comprises a second rotor baffle, the rotor 2 and the second rotor baffle are coaxially arranged, the second rotor baffle is located at one end, close to the cooling fan, of the rotor 2, and the air exhaust directions of the first rotor baffle and the second rotor baffle are the same. In can introducing rotor 2 with the air through first rotor baffle, can be outside air escape rotor 2 through second rotor baffle to make the air flow in the motor, the heat that will keep away from the motor of radiator fan one side is taken to the one side that is close to radiator fan, and then dispels the heat with higher speed.

Further, as shown in fig. 2, in the rear view of the rotor baffle 1, the blades 14 extend twisted in a clockwise direction to ensure that the first rotor baffle can introduce wind into the rotor 2 and the second rotor baffle can expel wind from the rotor 2.

Furthermore, the heat dissipation fan is located at the tail end of the motor, when the rotor 2 rotates, the rotor baffle 1 is driven to rotate together, the first rotor baffle sucks air into the rotor 2 from the head end of the motor, the second rotor 2 enables the air in the rotor 2 to be exhausted out of the rotor 2 at an accelerated speed and exhausted out of the tail end of the motor, and therefore heat at the head end of the motor is brought to the tail end of the motor and matched with the heat dissipation fan, all parts of the motor have good heat dissipation effects, and the heat dissipation speed is high.

Further, the first section 141 of the first rotor baffle is arranged towards the rotor 2 and the second section 142 of the first rotor baffle is arranged away from the rotor 2.

The motor includes the stator, and the yoke portion of stator is provided with yoke portion through-flow hole, and rotor 2 includes magnet steel and magnet steel groove, has circulation gap 21 between magnet steel and the magnet steel groove, and the passageway 13 that overflows of first rotor baffle, circulation gap 21, second rotor baffle overflows passageway 13 and yoke portion through-flow hole and forms cooling circuit's partly.

Furthermore, the flow passage 13 of the first rotor baffle and the flow passage 13 of the second baffle are arranged opposite to the flow gap 21 between the magnetic steel and the magnetic steel groove, and air can flow through the flow passage 13 of the first rotor baffle, the flow gap 21 and the flow passage 13 of the second baffle in sequence.

Further, when rotor 2 is rotatory, first rotor baffle inhales the air to circulation gap 21 in from the head end of motor, arrange to the motor tail end through second rotor baffle, and give the motor casing of motor tail end heat transfer, dispel the heat to the motor tail end through the radiator fan who sets up at motor tail end outside, make the air cooling of arranging to the motor tail end, because the motor is inside to be airtight space, the air after the cooling returns to the motor head end again from yoke portion through-flow hole, accomplish a cycle period, realize the inside air forced circulation of motor, reduce the temperature rise of motor, the life of improvement motor.

Further, air at the tail end of the motor can also return to the head end of the motor through the air gap.

According to the rotor baffle plate 1 provided by the embodiment of the invention, a closed airflow accelerating loop is formed in the motor, so that the gas circulation speed in the motor can be accelerated, the cooling efficiency is improved, the temperature rise of the motor is reduced, and the temperature of the stator rotor 2 of the motor is reduced.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A rotor baffle is characterized by comprising a plate body, an overflowing channel (13) arranged on the plate body, and a plurality of fan blades (14) arranged in the overflowing channel (13);

the fan blade (14) comprises a first section (141) and a second section (142), an included angle is formed between the first section (141) and the second section (142), the rotor baffle (1) rotates along with the rotor (2), and the fan blade (14) is used for guiding cooling fluid to the opposite side from one side of the rotor baffle (1);

the rotor baffle (1) comprises an inner disc (12) and an outer ring (11), and the overflowing channel (13) is positioned between the inner disc (12) and the outer ring (11);

the second section (142) extends from one end of the inner disc (12) to the other end of the inner disc (12) in a twisting mode, the second section (142) comprises a first end face (1421) and a second end face (1422) which are arranged oppositely, and the first end face (1421) is connected with the first section (141);

the second section (142) further comprises a third end face (1423) and a fourth end face (1424) which are oppositely arranged, the third end face (1423) is connected with the second end face (1422) to form a first corner portion (1425), the fourth end face (1424) is connected with the second end face (1422) to form a second corner portion (1426), the first corner portion (1425) is connected to the inner disc (12), and the second corner portion (1426) is connected to the outer ring (11).

2. The rotor baffle according to claim 1, characterized in that the first section (141) extends out of the plane of the outer ring (11).

3. The rotor baffle as recited in claim 1, wherein a midpoint a1 of an intersection of the first end surface (1421) and the third end surface (1423), a midpoint of an intersection of the first end surface (1421) and the fourth end surface (1424) is a2, a connection of a1 and a2 is L1, a midpoint B1 of an intersection of the second end surface (1422) and the third end surface (1423), a midpoint of an intersection of the second end surface (1422) and the fourth end surface (1424) is B2, a connection of B1 and B2 is L2, and an angle between projections of L1 and L2 in a plane of the inner disc (12) is not less than 30 ° and not more than 70 °.

4. The rotor baffle of claim 1, wherein the second end face (1422) has a projected length L3 in a radial direction of the plate body in a plane of the plate body, the plate body has an annular configuration, and an annular width of the plate body is L4, and L3 is not less than one third of L4.

5. The rotor baffle according to claim 1, characterized in that the second sections (142) of adjacent blades (14) are stacked, and the overflow channel (13) is formed between two stacked second sections (142).

6. The rotor baffle according to claim 1, characterized in that the width of the end of the fan blade (14) close to the inner disc (12) is greater than the width of the end close to the outer ring (11).

7. The rotor baffle of claim 1, wherein the plate body is uniformly provided with dynamic balance reserved holes in the circumferential direction.

8. An electrical machine, characterized in that it comprises a rotor guard (1) according to any one of claims 1-7.

9. The machine according to claim 8, characterized in that the machine comprises a rotor (2) and a radiator fan, the rotor baffle (1) comprising a first rotor baffle, the rotor (2) being arranged coaxially with the first rotor baffle, the first rotor baffle being located at an end of the rotor (2) remote from the radiator fan.

10. The electrical machine according to claim 9, characterized in that the rotor baffle (1) further comprises a second rotor baffle, the rotor (2) being arranged coaxially with the second rotor baffle, the second rotor baffle being located at an end of the rotor (2) close to the cooling fan, the first and second rotor baffles being arranged in the same direction of air discharge.

11. The electric machine according to claim 10, characterized in that the electric machine comprises a stator, the yoke part of the stator is provided with a yoke through-flow aperture, the rotor (2) comprises magnetic steel and a magnetic steel slot with a through-flow gap (21) between them, the through-flow channel (13) of the first rotor baffle, the through-flow gap (21), the through-flow channel (13) of the second rotor baffle and the yoke through-flow aperture form part of a cooling circuit.