CN217388348U

CN217388348U - Disc type motor rotor with fan blades

Info

Publication number: CN217388348U
Application number: CN202221074967.0U
Authority: CN
Inventors: 陈拯民
Original assignee: Tongling Hardcore Technology Co ltd
Current assignee: Huzhou Hardcore Pai Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-09-06
Anticipated expiration: 2032-05-06

Abstract

The utility model relates to a motor field, concretely relates to take disc motor rotor of flabellum, including rotor backplate, magnetic conductive plate and magnet steel, the rotor backplate be opening form casing, the whole ring form that is of magnetic conductive plate, in the cavity of rotor backplate is arranged in to the magnetic conductive plate, the magnet steel be provided with two and more than two, the magnet steel is attached on the surface that the magnetic conductive plate is close to rotor backplate opening part one side, and a plurality of magnet steels are provided with the flabellum more than two on the bottom lateral surface of rotor backplate along the even interval arrangement of circumference of magnetic conductive plate, the multi-disc flabellum uses the geometric centre of rotor backplate to be the radial distribution in center. The rotor backplate is equivalent to the fan, and the rational utilization bottom space of disk motor rotor backplate is integrated as an organic whole with fan and rotor backplate, avoids increasing the fan in addition, reduces spare part, also practices thrift the space simultaneously.

Description

Disc type motor rotor with fan blades

Technical Field

The utility model relates to the field of electric machines, concretely relates to take disc electric motor rotor of flabellum.

Background

The disc type motor is an axial permanent magnet motor, and a rotor of the motor mainly comprises a rotor back plate, a magnetic conduction plate and magnetic steel, wherein the magnetic steel and the magnetic conduction plate are fixed on the rotor back plate. When the rotor is operated and kept in a high-speed running state for a long time, friction is generated between the rotor and a bearing, a rotating shaft, an oil seal and the like, and the mechanical friction generates very large heat. The magnetic steel of the rotor can generate eddy current loss, the magnetic conduction plate can also generate iron loss, and the losses can be converted into heat to be gathered on the rotor, so that the local heat of the rotor is too high. The magnetic performance of the magnetic steel can be greatly reduced due to the overhigh temperature of the rotor, and the magnetic steel can be demagnetized when the temperature is serious. In addition, too high temperature may also cause deformation of parts on the rotor, resulting in unstable fixation. If the heat is not timely transmitted to the outside of the motor, after the heat of the motor reaches a certain degree, insulation breakdown easily occurs, and the motor is burnt out.

Disclosure of Invention

The utility model aims at providing a take disc electric motor rotor of flabellum that radiating effect is good.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a take disk motor rotor of flabellum, includes rotor backplate, magnetic conductive plate and magnet steel, the rotor backplate be opening form casing, the magnetic conductive plate is whole to be the ring form, the magnetic conductive plate is arranged in the cavity of rotor backplate, the magnet steel be provided with two and more than two, the magnet steel is attached on the surface that the magnetic conductive plate is close to rotor backplate opening part one side, and a plurality of magnet steels along the even interval arrangement of circumference of magnetic conductive plate, be provided with the flabellum more than two on the bottom lateral surface of rotor backplate, the radial distribution of multi-disc flabellum uses the geometric centre of rotor backplate as the center

Due to the adoption of the technical scheme, the rotor back plate is equivalent to a fan, the rotor normally works and simultaneously stirs the air flow in the motor, the heat in the motor is quickly and timely taken away, and the heat dissipation effect of the motor is improved. The bottom space of the rotor back plate of the disc type motor is reasonably utilized, the fan and the rotor back plate are integrated, the additional increase of the fan is avoided, parts are reduced, and the space is saved.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a top sectional view of the present invention;

fig. 4 is a perspective view of a rotor back plate.

Detailed Description

The utility model provides a take disk motor rotor of flabellum, includes rotor backplate 10, magnetic conduction board 20 and magnet steel 30, rotor backplate 10 be opening form casing, magnetic conduction board 20 is whole to be the ring form, magnetic conduction board 20 is arranged in the cavity of rotor backplate 10, magnet steel 30 be provided with two and more than two, magnet steel 30 is attached on the surface that magnetic conduction board 20 is close to rotor backplate 10 opening part one side, and a plurality of magnet steels 30 along the even interval arrangement of circumference of magnetic conduction board 20, be provided with flabellum 12 more than two on the 11 lateral surfaces in bottom of rotor backplate 10, a plurality of flabellums 12 use the geometric centre of rotor backplate 10 as the radial distribution in center. The bottom 11 refers to the outer bottom surface of the rotor back plate 10, and the plurality of fan blades 12 are uniformly distributed on the rotor back plate 10 to avoid affecting the dynamic balance of the rotor. In order to meet the requirement of installing a heat dissipation fan on the motor for heat dissipation, a mounting cavity of the fan needs to be arranged, the fan needs to keep a sufficient gap with adjacent parts such as a rotor and the like to avoid mutual interference, so that the cavity for installing the fan needs to be large enough, and the whole volume of the motor is undoubtedly increased. The utility model discloses in, set up a plurality of flabellums on the bottom 11 of rotor backplate 10, when the rotor is rotatory, flabellum 12 will follow person rotor backplate 10 and rotate, and rotor backplate 10 of this structure is equivalent to the fan. When the rotor normally works, the air flow in the motor is stirred, the heat in the motor is quickly and timely taken away, and the heat dissipation effect of the motor is improved. And rationally utilized the bottom space of disk motor rotor backplate, integrated as an organic whole with fan and rotor backplate, avoided increasing the fan in addition, reduced spare part, also practiced thrift the space simultaneously. The fan blades 12 are arranged to be equivalent to the reinforcing ribs of the rotor back plate 10, and the strength of the rotor back plate 10 can be increased, so that multiple purposes are achieved.

And a lightening hole 13 is formed in the area between two adjacent fan blades 12 on the bottom 11. The rotor back plate 10 mainly bears the suction force of the magnetic steel to the rotor back plate, the stress is not very large, and the strength does not need to be particularly high. In addition, the fan blades 12 play a role of reinforcing ribs, so that lightening holes 13 can be reasonably formed in the rotor back plate 10, and the weight of the rotor back plate 10 can be lightened. The lightening holes 13 can be through holes or blind holes, and can be specifically designed according to the structure of the rotor back plate 10, preferably, the lightening holes 13 are designed into through holes, so that the lightening holes 13 can communicate the inside and the outside of the rotor to play a role of ventilation. The heat inside the rotor back plate 10 is directly and quickly dissipated to the outside of the rotor, heat accumulation is effectively avoided, and the heat dissipation effect of the rotor is improved.

The thickness of the fan blade 12 is 1-7 mm. Too thick fan blades 12 may waste material and unnecessarily add weight, while too thin fan blades 12 may not meet the strength requirements, so the specific thickness may be specifically selected according to the size of the motor. For example, the small motor is stressed less, the fan blades do not need to be too thick and usually have the thickness of about 3mm, and the large motor needs to be stressed more and then needs to have a slightly larger thickness, usually about 5 mm.

The number of the fan blades 12 is the same as that of the magnetic steels 30, and the positions of the fan blades 12 correspond to the joint of two adjacent magnetic steels 30 in the circumferential direction. The setting of flabellum 12 corresponding magnet steel 12 can guarantee that the power that bears on the flabellum 12 is unanimous, and the atress is more even, is favorable to the dynamic balance of rotor more.

The tail ends of the fan blades 12 extend to the outer part of the edge of the rotor back plate 10, and a distance is reserved between the starting ends of the fan blades 12 and the geometric center of the rotor back plate 10 and is 20-60% of the radius of the rotor back plate 10.

In other words, the starting ends of the fan blades 12 start from a position approximately in the middle of the rotor back plate 10, where the middle is a half of the radius of the rotor back plate 10. The distance between the starting end of the fan blades 12 and the geometric center of the rotor back plate 10 forms a wind gathering area where the wind amount gathers and then disperses among the fan blades. The middle of the rotor backplate forms a low pressure region and the edge of the rotor backplate 10 forms a high pressure region. Under the action of pressure difference, wind current can flow to the outside of rotor and stator from the clearance between rotor and the stator, if open the ventilative hole on motor housing, wind current will discharge from the ventilative hole, forms the wind circulation between stator and the rotor working face for the radiating rate of stator and rotor.

The fan blades 12 are upright in root and inclined towards the same side at the tail ends. The tail end of the fan blade inclines towards the outer edge, the structure is favorable for guiding wind flow, the inclination direction of the fan blade is consistent with the rotation direction of the rotor, the wind flow can be ensured to be smoother, and the wind quantity is larger.

The cavity of the rotor back plate 10 is internally provided with an annular boss 14, an annular region formed between the inner side wall of the rotor back plate 10 and the annular boss 14 is used for accommodating the magnetic conduction plate 20, the middle part of the outer side surface of the rotor back plate 10 bulges towards the outer side to form a convex part 15, the middle part of the annular boss 14 is provided with a through hole for a shaft to pass through, the through hole extends to the convex part 15, and the height of the fan blade 12 is slightly higher than or equal to the outer end surface of the convex part 15. The structure is favorable for converging the wind flow, and the wind flow is ensured to be smoother.

The lightening holes 13 are small and large flared holes inside, wherein the hole diameter close to the middle of the rotor back plate 10 is small, and the hole diameter close to the outer edge of the rotor back plate 10 is large. The aperture of the lightening holes 13 increases from the inner side to the outer side, wherein the outermost side of the lightening holes 13 extends to the fan blades 12, the whole structure is similar to a fan shape, the width of the inner ring is 5mm, and the width of the outer ring is 8 mm. The lightening holes 13 are located outward from the inner side of the rotor back plate 10.

The rotor back plate 10 comprises a rotor back plate body and a shell with fan blades, and the shell is clamped and fixed on the rotor back plate body. The rotor back plate 10 and the fan blades 12 may be formed by one-time die casting, or may be formed as a separate component, for example, a dedicated housing may be designed for the fan blades, and the housing is fixed on the rotor back plate, so that the two can be fixedly mounted. The housing and the fan blades of the structure can be made into plastic parts, so that the cost is lower, and the weight is lighter. The practical split structure can simplify the structure of the rotor back plate and reduce the processing difficulty and the production cost. The rotor back plate 10 formed by integral die casting has higher strength and has advantages, and can be specifically designed according to requirements.

Claims

1. The utility model provides a take disk motor rotor of flabellum, includes rotor backplate (10), magnetic conduction board (20) and magnet steel (30), rotor backplate (10) be opening form casing, magnetic conduction board (20) wholly is the ring form, in the cavity of rotor backplate (10) is arranged in to magnetic conduction board (20), its characterized in that: magnet steel (30) be provided with two and more than two, magnet steel (30) are attached on the surface that is close to rotor backplate (10) opening part one side in magnetic conduction board (20), and a plurality of magnet steel (30) are along the even interval arrangement of circumference of magnetic conduction board (20), are provided with flabellum (12) more than two on bottom (11) lateral surface of rotor backplate (10), and multi-disc flabellum (12) use the geometric centre of rotor backplate (10) as the radial distribution in center.

2. The bladed disc motor rotor of claim 1, characterized in that: and lightening holes (13) are formed in the area between two adjacent fan blades (12) on the bottom (11).

3. The bladed disc motor rotor of claim 2, characterized in that: the thickness of the fan blade (12) is 1-7 mm.

4. The bladed disc motor rotor of claim 3, characterized in that: the number of the fan blades (12) is consistent with that of the magnetic steels (30), and the positions of the fan blades (12) correspond to the joint of two adjacent magnetic steels (30) in the circumferential direction.

5. The bladed disc motor rotor of claim 4, characterized in that: the tail ends of the fan blades (12) extend to the outer part of the edge of the rotor back plate (10), and a distance is reserved between the starting end of the fan blade (12) and the geometric center of the rotor back plate (10), wherein the distance is 20% -60% of the radius of the rotor back plate (10).

6. The bladed disc motor rotor of claim 5, characterized in that: the root of the fan blade (12) is upright, and the tail end of the fan blade inclines towards the same side.

7. The bladed disc motor rotor of claim 6, characterized in that: the cavity of rotor backplate (10) in be provided with annular boss (14), the annular region that forms between the inside wall of rotor backplate (10) and annular boss (14) is used for holding magnetic conduction board (20), the middle part of the lateral surface of rotor backplate (10) constitutes convex part (15) towards outside uplift, the middle part of annular boss (14) sets up the through-hole that supplies the axle to pass, this through-hole extends to convex part (15), flabellum (12) highly be more than a little more than or equal to the outer terminal surface of convex part (15).

8. The bladed disc motor rotor of claim 7, characterized in that: the inner part of the lightening hole (13) is a small flared hole, the outer part of the lightening hole is a large flared hole, the aperture close to the middle part of the rotor back plate (10) is small, and the aperture close to the outer edge of the rotor back plate (10) is large.

9. The bladed disc motor rotor of claim 8, characterized in that: the aperture of each lightening hole (13) is gradually increased from the inner side to the outer side, wherein the outermost side of each lightening hole (13) extends to the position of each fan blade (12) and is similar to a fan shape as a whole, the inner ring width is 5mm, and the outer ring width is 8 mm.

10. The bladed disc motor rotor of claim 9, characterized in that: the rotor back plate (10) comprises a rotor back plate body and a shell with fan blades, and the shell is clamped and fixed on the rotor back plate body.